WO2025113398A1 - Control instruction transmission method, dimmer, and backlight unit - Google Patents

Abstract

A control instruction transmission method, a dimmer (132), and a backlight unit (13). The dimmer (132) first receives a control instruction group, then decodes a target control instruction in the control instruction group, and finally filters out the target control instruction in the control instruction group and sends the control instructions left after the filtering to a next-stage dimmer (132) connected in series to the dimmer (132), wherein the target control instruction is a control instruction corresponding to the dimmer (132). Since the dimmer (132) transmits, during control instruction transmission, control instructions other than the control instruction decoded by itself, compared with the transmission of all control instructions in the prior art, the bandwidth can be reduced, and the communication quality can be improved.

Description

A method for controlling command transmission, a dimmer and a backlight unit

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on November 27, 2023, with application number 202311595885.X and application name "A method for controlling instruction transmission, dimmer and backlight unit", the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of display technology, and in particular to a method for controlling instruction transmission, a dimmer and a backlight unit.

Background Art

With the development of local dimming technology, the performance of liquid crystal display (LCD) has been greatly improved. The local dimming system includes the timing controller (TCON), dimming controller and backlight unit (BLU). The backlight unit is an important part of the local dimming system, and the performance of the backlight unit will directly affect the display effect of the image.

The backlight unit includes a dimmer (English: DIMMER) and a sub-millimeter light emitting diode (English: Mini Light Emitting Diode, Mini LED for short). Usually, the dimmers in the backlight unit are connected in series, and the dimming controller and the dimmers connected in series use a single-wire (English: Single Wire) protocol to communicate. The dimming controller is connected to the first-level dimmer in the dimmers connected in series, and the dimmer sends a control instruction group to the first-level dimmer, and the first-level dimmer sends the control instruction group to other dimmers connected in series step by step.

The method of transmitting control instructions for dimmers provided in the related art wastes bandwidth and affects the communication quality.

Summary of the invention

The present invention provides a control instruction transmission method, a dimmer and a backlight unit, which are used to solve the problem in the prior art that the dimmer transmits control instructions in a manner that wastes bandwidth and affects communication quality.

In a first aspect, the present application provides a method for transmitting a control instruction, which is applied to dimmers connected in series, and the method comprises:

receiving a control instruction group;

Decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer;

The target control instruction in the control instruction group is filtered out, and the filtered control instruction is sent to the next stage dimmer connected in series with the current dimmer.

In a possible implementation, if the order of the dimmers connected in series is the same as the order of the control instructions corresponding to the dimmers in the control instruction group, decoding the target control instruction in the control instruction group includes:

The first control instruction in the control instruction group is decoded.

In a possible implementation manner, after decoding the first control instruction in the control instruction group, the method further includes:

Locking the first control instruction in the control instruction group;

The step of filtering out the target control instruction in the control instruction group and sending the filtered control instruction to the next-stage dimmer connected in series with the current dimmer includes:

The unlocked control instructions in the control instruction group are sent to the next-stage dimmer connected in series with the current dimmer.

In a possible implementation manner, after receiving the control instruction group and before decoding the target control instruction in the control instruction group, the method further includes:

It is determined that the control instructions in the control instruction group have not been decoded.

In a possible implementation, if the current dimmer is a first-stage dimmer connected in series, the receiving control instruction group includes:

Receiving a first control instruction group sent by a dimming controller;

If the current dimmer is the non-first-stage dimmer connected in series, the receiving control instruction group includes:

receiving a second control instruction group sent by a previous-stage dimmer connected in series with the dimmer;

If the current dimmer is the last dimmer in the series-connected dimmers, the control instruction group is the last control instruction in the first control instruction group.

In a possible implementation, the number of control instructions in the first control instruction group is the same as the total number of dimmers connected in series;

The number of control instructions in the second control instruction group is the difference between the total number of controllers connected in series and the position-related information of the current dimmer, and the position-related information of the current dimmer is the difference between the position of the current controller in the controllers connected in series and 1.

In a possible implementation manner, each control instruction in the control instruction group includes a control signal; or

Control signals and dimming data; or

Identification, control signals and dimming data.

In a second aspect, the present application provides a dimmer, comprising:

A receiving module, used for receiving a control instruction group;

A decoding module, used for decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer;

The sending module is used to filter the target control instructions in the control instruction group, and send the filtered control instructions to the next-stage dimmer connected in series with the current dimmer.

In a third aspect, the present application provides a dimmer, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the control instruction transmission method as described in any one of the first aspects are implemented.

In a fourth aspect, the present application provides a backlight unit, comprising a Mini LED and a plurality of dimmers as described in the third aspect connected in series, wherein:

The dimmer is used to control the Mini LED connected to the dimmer according to the decoded control instructions.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of an application scenario of a control instruction transmission method provided in an embodiment of the present application;

FIG2 is a schematic structural diagram of a backlight unit provided in the related art;

FIG3 is a schematic diagram of a method for transmitting a signal instruction group provided by the related art;

FIG4 is a schematic diagram of another method for transmitting a signal instruction group provided by the related art;

FIG5 is a schematic diagram of a flow chart of a method for transmitting a control instruction provided in an embodiment of the present application;

FIG6 is a schematic diagram of a method for transmitting a signal instruction group provided in an embodiment of the present application;

FIG7 is a schematic diagram of another method for transmitting a signal instruction group provided in an embodiment of the present application;

FIG8 is a schematic diagram of another method for transmitting a signal instruction group provided in an embodiment of the present application;

FIG9 is a schematic diagram of a control instruction transmission and locking action provided by an embodiment of the present application;

FIG10 is a flow chart of a method for each dimmer to transmit instructions provided by an embodiment of the present application;

FIG11 is a schematic diagram of the structure of a dimmer provided in an embodiment of the present application;

FIG12 is a schematic diagram of the structure of another dimmer provided in an embodiment of the present application;

FIG13 is a schematic diagram of the structure of a program product provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

As shown in Figure 1, it is a schematic diagram of an application scenario of the method for transmitting control instructions provided in an embodiment of the present invention. The regional dimming system includes a timing controller (TCON) 11, a dimming controller (Dimming Controller) 12 and a backlight unit (BLU) 13, wherein the backlight unit 13 includes a backlight matrix composed of multiple Mini LEDs (L11, ..., L(2n)m) and multiple dimmers (Dimmer 11, ..., Dimmer nm). Exemplarily, the Mini LED (L11, ..., L(2n)m) can be a direct-type AM (English: Active Matrix, Chinese: active matrix) Mini LED. Specifically, the number of Mini LEDs that make up the backlight matrix can be determined according to the size of the liquid crystal panel (LCP) 14 (English: Liquid Crystal Panel, abbreviation: LCP), and the number of dimmers can be determined according to the total number of Mini LEDs and the number of Mini LEDs controlled by one dimmer. For example, one dimmer can control two Mini LEDs, and one dimmer can also control four Mini LEDs. The embodiment of the present invention is described by taking one dimmer controlling two Mini LEDs as an example.

In a specific implementation, the timing controller 11 is connected to the dimming controller 12 and the liquid crystal panel 14, respectively, for transmitting local dimming data to the dimming controller 12, and transmitting a display image signal to the liquid crystal panel 14, so that the liquid crystal panel 14 displays an image according to the display image signal; the dimming controller 12 is also connected to the dimmer (Dimmer 11, ..., Dimmer nm) in the backlight unit 13, for controlling the dimmer (Dimmer 11, ..., Dimmer nm). Specifically, the interface connecting the dimming controller 12 and the dimmer (Dimmer 11, ..., Dimmer nm) can be a single thread (Single Lin) of a clock embedded (CLOCK Imbedded). e) interface to achieve simple and effective wiring; the dimmers (Dimmer 11, ..., Dimmer nm) can also be distributed in a matrix according to the distribution of the backlight matrix. Taking the first-level dimmer (Dimmer 11) as an example, since it controls two Mini LEDs (L11, L21), the first output end of Dimmer 11 is electrically connected to the negative electrode of Mini LED L11, the second output end of Dimmer 11 is electrically connected to the negative electrode of Mini LED L21, and the positive electrode of Mini LED L11 and the positive electrode of Mini LED L21 are both connected to the power supply terminal VDD. The connection method of other levels of dimmers is similar to that of Dimmer 11, and the repeated parts are not repeated. The dimmers (Dimmer 11, ..., Dimmer nm) are used to control the brightness of the Mini LED connected thereto according to the received local dimming data, thereby realizing the adjustment of the brightness of the backlight unit 13.

As shown in FIG2 , it is a schematic diagram of the structure of a backlight unit provided in the related art. The backlight unit 13 includes an array-distributed Mini LED 131 and an array-distributed dimmer 132. The array-distributed dimmer 132 includes a plurality of groups of dimmers connected in series. For each group of dimmers connected in series, a dimming controller is connected to a first-level dimmer in each group of dimmers connected in series. The dimming controller outputs the output control instruction group to the first-level dimmer, and then the first-level dimmer transmits the control instruction group to the next-level dimmer, and so on. After each level of dimmer receives the control instruction group, it decodes the control instruction in the control instruction group to obtain the control instruction corresponding to the dimmer, and the dimmer controls the Mini LED connected to the dimmer according to the control instruction.

As shown in Figure 3, a schematic diagram of a signal instruction group transmission method provided by the related technology is shown. Figure 3 shows the use of the same set of command communication between dimmers connected in series, that is, the same control command is transmitted between dimmers connected in series, and the control signal included in the control command is the same. The dimming controller sends n control commands to dimmer 1 (first-level dimmer) in the series-connected dimmers. After receiving the n control commands, dimmer 1 decodes the n control commands and controls the Mini LED connected to dimmer 1 according to the decoded commands. Dimmer 1 sends n control commands to dimmer 2 (second-level dimmer). After receiving the n control commands, dimmer 2 decodes the n control commands and controls the Mini LED connected to dimmer 2 according to the decoded commands, and so on, until n control commands are sent to dimmer n (the last-level dimmer).

The dimmer decodes the received control command, executes the corresponding settings, and forwards the control command to the next level dimmer. Since the dimmers are connected in series, only the time of forwarding the control command is different, and all dimmers can be set in the same way.

In the method for transmitting the signal instruction group shown in FIG3 , since the n control instructions are the same, the dimmer identifier, such as the dimmer address or the dimmer identity (English: Identity Document, abbreviated as: ID), may not be added to the control instruction. For control instruction groups with different control instructions, in order to ensure that the control instruction obtained by dimmer decoding is the control instruction corresponding to the dimmer, the dimmer identifier, such as ID, may be carried in the control instruction, as shown in FIG4 .

As shown in FIG4 , a schematic diagram of another signal instruction group transmission method provided by the related art is shown. Similarly, FIG4 also includes n dimmers connected in series (dimmer 1, dimmer 2, dimmer 3… dimmer n-1, dimmer n). The dimming controller sends n control instructions to dimmer 1. After receiving the n control instructions, dimmer 1 decodes the control instructions corresponding to dimmer 1 in the received control instructions. For example, the first control instruction among the n control instructions is used, and the remaining (n-1) control instructions are not decoded. Dimmer 1 controls the Mini LED connected to dimmer 1 according to the decoded control instructions. Dimmer 1 sends n control instructions to dimmer 2. After receiving n control instructions, dimmer 2 decodes the control instruction corresponding to dimmer 2 among the received control instructions, for example, the second control instruction among the n control instructions, and the remaining (n-1) control instructions are not decoded. Dimmer 2 controls the Mini LED connected to dimmer 2 according to the decoded control instructions; ... After dimmer n receives n control instructions sent by dimmer n-1, it decodes the control instruction corresponding to dimmer n among the received control instructions, for example, the last control instruction among the n control instructions, and the remaining (n-1) control instructions are not decoded. Dimmer n controls the Mini LED connected to dimmer n according to the decoded control instructions.

Specifically, the dimmer selects the control instruction corresponding to the dimmer based on the ID in the control instruction. For example, the dimmer has its own ID set, and the control instruction in the received control instruction with the same ID as the ID set by the dimmer itself is used as the control instruction corresponding to the dimmer.

When a dimmer decodes a received control command, it can only execute settings and data if it is the same as the ID or address assigned to itself, and forward the control command to the next level dimmer. Since the dimmers are connected in series, there are differences in the time of control command transmission, and the ID or address of all dimmers is independent, so different settings and data can be executed.

It should be noted that in the control instruction transmission method of the related technology shown in Figures 3 and 4, the order of control instructions in the control instruction group sent by the dimming controller is different from the order of the dimmers connected in series. Figures 3 and 4 are only for the convenience of description.

In the above two signal instruction group transmission methods, since the number of control instructions transmitted between dimmers is n, bandwidth will be wasted and communication quality will be affected.

Based on this, the embodiments of the present invention provide a method for controlling instruction transmission, a dimmer, and a backlight unit to reduce the bandwidth occupied during instruction transmission and improve communication quality.

The solution provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

As shown in FIG5 , a control instruction transmission method provided in an embodiment of the present application is applied to dimmers connected in series. The method includes the following steps:

S501, receiving a control instruction group;

S502, decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer;

S503: Filter the target control instruction in the control instruction group, and send the filtered control instruction to the next-stage dimmer connected in series with the current dimmer.

The embodiment of the present application provides a method for transmitting control instructions. The current dimmer first receives a control instruction group, then decodes a target control instruction in the control instruction group, and finally filters the target control instruction in the control instruction group, and sends the filtered control instruction to the next-level dimmer connected in series with the current dimmer, wherein the target control instruction is a control instruction corresponding to the current dimmer. Since the dimmer transmits other control instructions except the control instructions decoded by itself during the process of transmitting the control instructions, compared with the prior art of transmitting all control instructions, the bandwidth can be reduced and the communication quality can be improved.

It should be noted that in the embodiment of the present invention, there is no restriction on the number of dimmers connected in series.

In one implementation, if the current dimmer is a first-level dimmer among the dimmers connected in series, the control instruction group is a first control instruction group sent by the dimming controller; if the current dimmer is a dimmer of another level except the first-level dimmer among the dimmers connected in series, the control instruction group is a second control instruction group sent by the previous level dimmer of the current dimmer, wherein the dimmer directly connected to the dimming controller is the first-level dimmer.

The control instruction group received by the dimmer in the embodiment of the present application is composed of control instructions received in sequence. For example, dimmer 1 receives the control instruction group sent by the dimming controller, first receives the first control instruction in the control instruction group, then receives the second control instruction in the control instruction group, and then receives the third control instruction in the control instruction group...

In one embodiment, if the order of the dimmers connected in series is the same as the order of the control instructions corresponding to the dimmers in the control instruction group, the current dimmer decodes the first control instruction in the control instruction group, that is, the target control instruction is the first control instruction in the control instruction group, and the target control instruction in the control instruction group is filtered, and the filtered control instruction is sent to the next-level dimmer connected in series with the current dimmer, that is, the other control instructions in the control instruction group except the first control instruction are sent to the next-level control instruction.

For example, the dimmers connected in series are dimmer 1, dimmer 2 and dimmer 3, and the control instruction group received by dimmer 1 is CMD.1, CMD.2, and CMD.3. Dimmer 1 receives the control instruction group CMD.1, CMD.2, and CMD.3, decodes the first control instruction CMD.1, filters the first control instruction CMD.1 in the control instruction group CMD.1, CMD.2, and CMD.3, and sends the filtered control instructions CMD.2 and CMD.3 to dimmer 2; dimmer 2 receives the control instruction group CMD.2 and CMD.3, decodes the first control instruction CMD.2, filters CMD.2 in the control instruction group CMD.2 and CMD.3, and sends the filtered control instruction CMD.3 to dimmer 3; dimmer 3 receives the control instruction CMD.3, decodes the first control instruction CMD.3. Since dimmer 3 receives only one control instruction, there is no need to filter the control instruction group.

In one embodiment, after the dimmer receives the first control instruction, it can lock the first control instruction after decoding the received first control instruction, and then all control instructions belonging to the control instruction group received are forwarded to the next-level dimmer.

For example, as shown in Figure 6, it is a schematic diagram of a signal instruction transmission method provided in an embodiment of the present application. In Figure 6, the control instruction group sent by the dimming controller has the same order of control instructions in the control instruction group as the order of the dimmers connected in series, that is, the control instruction corresponding to dimmer 1 is CMD.1, the control instruction corresponding to dimmer 2 is CMD.2..., the control instruction corresponding to dimmer n is CMD.n, dimmer 1 receives the control instruction group (n control instructions) sent by the dimming controller, dimmer 1 decodes the first control instruction (CMD.1) of the control instruction group, and then sends the other control instructions except the first control instruction (CMD.1) to dimmer 2, after dimmer 2 receives the control instruction group ((n-1) control instructions), it decodes the first control instruction (CMD.2) in the received control instruction group, and then sends the other control instructions except the first control instruction (CMD.2) to dimmer 2, and so on, until the control instruction is sent to the last level dimmer, that is, dimmer n.

In the embodiment of the present application, since the control instruction decoded and locked by the dimmer is the first control instruction in the received control instruction group, there is no need to set an inherent address or ID, thereby reducing the complexity of data processing and improving processing efficiency.

It should be noted that before sending the control instruction group, the dimming controller needs to sort the control instructions in the control instruction group according to the order of the dimmers connected in series. For example, the order of the dimmers is dimmer 1, dimmer 2, dimmer 3... dimmer n-1, dimmer n, the control instruction corresponding to dimmer 1 is CMD.1, the control instruction corresponding to dimmer 2 is CMD.2, the control instruction corresponding to dimmer 3 is CMD.3,..., and the control instruction corresponding to dimmer n is CMD.n. Then the control instruction group sent by the dimming controller is CMD.1, CMD.2, CMD.3,..., CMD.n.

It can be seen from Figure 6 that the last-level dimmer (dimmer n) only receives one control instruction, that is, if the current dimmer is the last-level dimmer connected in series, the control instruction group received by the last-level dimmer is the last control instruction in the control instruction group sent by the dimming controller.

During implementation, after the current dimmer decodes the control instruction, the Mini LED connected to the dimmer is controlled according to the decoded control instruction.

In a specific implementation, the number of control instructions in the first control instruction group (the control instruction group sent by the dimming controller) in the embodiment of the present application is the same as the total number of dimmers connected in series. For example, as shown in Figure 6, the control instruction group sent by the dimming controller includes n control instructions; the number of control instructions in the second control instruction group (the control instruction group sent by the dimmer) in the embodiment of the present application is the difference between the total number of controllers connected in series and the position-related information of the dimmer, wherein the position-related information of the dimmer is the difference between the position of the dimmer in the dimmers connected in series and 1. For example, as shown in Figure 6, the difference between the total number of dimmers connected in series, n, and the position-related information of dimmer 1, the position-related information of dimmer 1 is the difference between 1 and 1, that is, 0, then the number of control instructions in the control instruction group sent by dimmer 1 is (n-(1-1))=n.

In one embodiment, each control instruction in the control instruction group may include only a control signal, and the control signal in each control instruction may be the same control signal, as shown in FIG6 .

In another embodiment, as shown in FIG. 7 , each control instruction in the control instruction group includes both a control signal and dimming data. In this case, the control signal in each control instruction may be different or the same, and the dimming data in each control instruction may be different or the same.

In the related art, if the control instructions in the control instruction group are different, the only way is to set the ID in the dimmer, and set the ID in both the control signal and the dimming data in the control instruction. Since the ID is set in both the control signal and the dimming data in the control instruction, the communication bandwidth will increase. However, with the gradual high configuration of AM Mini-LED display devices, the number of dimmers installed on the BLU increases, so that the communication bandwidth may not be able to bear the bandwidth requirements of the increased number of dimmers. On the other hand, if the number of dimmers increases, the communication bandwidth needs to be increased. The increase in communication bandwidth may cause electromagnetic interference (English: Electro Magnetic Interference, abbreviated as: EMI) or electromagnetic compatibility (English: Electro Magnetic Compatibility, abbreviated as: EMC) problems.

By adopting the control instruction transmission method provided in the embodiment of the present application, on the one hand, the dimmer can lock the control instruction corresponding to itself and send the unlocked control instruction to the next-level dimmer. Since the transmission of the control instruction is reduced, the bandwidth can be reduced, thereby reducing the problem of bandwidth meeting the demand caused by the increase of dimmers and affecting the communication quality. When the number of dimmers increases, the bandwidth will not increase, thereby reducing EMI or EMC. On the other hand, not setting the ID in the control instruction will further reduce the communication bandwidth and reduce EMI or EMC.

As shown in the following table, when the control instruction carries an ID or address, it occupies 6 bits, the control signal Config and the dimming data Data occupy 16 bits, a total of 24 bits; if the control instruction does not carry an ID or address, the control signal Config and the dimming data Data occupy 16 bits, a total of 16 bits. It can be seen that the bandwidth is increased by 50% when the control instruction carries an ID or address compared to the control instruction without an ID or address.

AM Mini-LED display devices are becoming increasingly highly configured, and the number of dimmers will increase, so the number of bits of the ID or address will also increase, the number of transmitted control instructions will also increase, and thus the communication bandwidth will also increase. The method for transmitting control instructions provided in the embodiment of the present application can reduce bandwidth and improve communication quality compared to the method for transmitting control instructions provided in the prior art.

In another embodiment, as shown in Figure 8, each control instruction in the control instruction group includes an identifier, a control signal and dimming data, wherein the identifier may be the ID of the dimmer, and the identifier carried in each control instruction is an identifier corresponding to the dimmer, for example, the ID carried in ID/CMD/DAT.1 is an ID corresponding to dimmer 1, such as ID1, and the ID carried in ID/CMD/DAT.2 is an ID corresponding to dimmer 2, such as ID2. At the same time, an identifier corresponding to the dimmer is also set in each dimmer, for example, the identifier set in dimmer 1 is ID1, and the identifier set in dimmer 2 is ID2. After the dimmer decodes the control instruction, the decoded identifier can be compared with the identifier set in the dimmer to confirm that the control instruction is the control instruction sent by the dimming controller to the dimmer.

If the ID obtained after the dimmer is decoded is different from the ID set in the dimmer, the dimmer may not control the Mini LED connected to the dimmer.

In a specific implementation, after the dimmer receives the control instruction group, it decodes the control instruction corresponding to the dimmer in the control instruction group, locks the control instruction corresponding to the dimmer, and sends the unlocked control instruction in the control instruction group to the next-level dimmer connected in series with the dimmer.

For example, as shown in Figure 6, the control instruction group received by dimmer 1 is n control instructions, CMD.1, CMD.2, CMD.3, ...., CMD.n-1, CMD.n. Dimmer 1 decodes the control instruction CMD.1 which is the first one in the control instruction group, and then locks the control instruction CMD.1. Dimmer 1 sends the unlocked control instructions (CMD.2, CMD.3, ...., CMD.n-1, CMD.n) to dimmer 2; the control instruction group received by dimmer 2 is n-1 control instructions, CMD.2, CMD.3, ...., CMD.n-1, CMD.n. Dimmer 2 decodes the control instruction CMD.2 which is the first one in the control instruction group, and then locks the control instruction CMD.2. Dimmer 2 sends the unlocked control instructions (CMD.3, ...., CMD.n-1, CMD.n) to dimmer 3.

After receiving the control instruction group, before decoding the target control instruction in the control instruction group, the dimmer first determines whether the dimmer has decoded the control instructions in the control instruction group. If not, the target control instructions in the received control instruction group are decoded and locked. If decoded, the received control instruction group is sent to the next-level dimmer connected to the dimmer.

In a specific implementation, the dimmer determines whether the control instruction in the control instruction group has been decoded. The judgment can be made based on the identifier of the control instruction group. For example, each control instruction in the control instruction group 1 carries the identifier 1 of the control instruction group. After the dimmer decodes the control instruction in the control instruction group 1, it marks the control instruction. After marking, when the dimmer receives the control instruction in the control instruction group 1 again, it does not decode the control instruction, but directly sends it to the next-level dimmer connected to the dimmer.

In another embodiment, if the order of the dimmers connected in series is different from the order of the control instructions corresponding to the dimmers, the dimmer compares the ID carried in the control instructions received in sequence and the ID set by the dimmer itself during the process of receiving the control instructions in the control instruction group. If they are different, the control instruction is sent to the next-level dimmer. If they are the same, the control instruction is decoded and locked, and then other unlocked control instructions in the control instruction group are sent to the next-level dimmer.

For example, the order of the dimmers connected in series is dimmer 1, dimmer 2, dimmer 3, ..., dimmer n-1, dimmer n, and the order of the control instructions in the control instruction group is ID/CMD/DAT.1, ID/CMD/DAT.3, ID/CMD/DAT.2, ... In this case, the dimmer first determines the control instruction corresponding to itself according to its own set ID and the ID in the control instruction, then decodes and locks the determined control instruction, and finally sends the unlocked control instruction to the next For example, the control instructions in the control instruction group received by dimmer 1 are ID/CMD/DAT.1, ID/CMD/DAT.3, ID/CMD/DAT.2, etc., dimmer 1 compares the ID1 set by itself with the ID1 carried in the control instruction ID/CMD/DAT.1, and determines that they are the same, then dimmer 1 decodes the control instruction ID/CMD/DAT.1 and locks the control instruction ID/CMD/DAT.1, and dimmer 1 determines that the control instruction ID/CMD/DAT.1 is the same as the control instruction ID/CMD/DAT.1. The control instructions in the control instruction group of ID/CMD/DAT.1, ID/CMD/DAT.3, ID/CMD/DAT.2... are decoded, and the received control instructions ID/CMD/DAT.3, ID/CMD/DAT.2... are sent to dimmer 2. After dimmer 2 receives the control instructions ID/CMD/DAT.3, ID/CMD/DAT.2..., dimmer 2 replaces the ID2 set by itself and the control instructions ID/CMD/DAT.3 with the control instructions ID/CMD/DAT. If the ID3 carried by the dimmer is compared and determined to be different, dimmer 2 sends the control instruction ID/CMD/DAT.3 to dimmer 3, and then dimmer 2 compares the ID2 set by itself with the ID2 carried in the next control instruction ID/CMD/DAT.2. If it is determined to be the same, dimmer 2 decodes the control instruction ID/CMD/DAT.2 and locks it. Dimmer 2 sends other unlocked control instructions to dimmer 3. After receiving the control instruction, dimmer 3 continues to execute the above steps.

As shown in Figure 9, it is an action diagram of control instruction transmission and locking provided in an embodiment of the present application. Figure 9 shows that 1 control instruction transmission represents that the dimming controller sends the first control instruction ID/CMD/DAT.1 to dimmer 1 (Dimmer#1), 1 control instruction decoding represents that dimmer 1 decodes the first control instruction ID/CMD/DAT.1, and 1 instruction locking represents that dimmer 1 locks the first control instruction ID/CMD/DAT.1; 2 control instruction transmissions represent that the dimming controller sends the second control instruction ID/CMD/DAT.2 to dimmer 1, and 2 control instruction forwardings represent that dimmer 1 forwards the second control instruction ID/CMD/DAT.1 to dimmer 2. Control instruction ID/CMD/DAT.2, 2 control instruction decoding means that dimmer 2 decodes the second control instruction ID/CMD/DAT.2, 2 control instruction locking means that dimmer 2 locks the second control instruction ID/CMD/DAT.2; 3 control instruction transmissions means that the dimming controller sends the third control instruction ID/CMD/DAT.3 to dimmer 1, 3 control instruction forwardings for the first time means that dimmer 1 sends the third control instruction ID/CMD/DAT.3 to dimmer 2, 3 control instruction forwardings for the second time means that dimmer 2 sends the third control instruction ID/CMD/DAT.3 to dimmer 3, and so on.

As shown in FIG. 10 , it is a flowchart of a method for each dimmer to transmit instructions provided in an embodiment of the present application, and the specific steps are as follows:

S1001, the previous level dimmer transmits the control instruction to the current level dimmer;

S1002, the current-stage dimmer receives the control instruction;

S1003, the current-stage dimmer determines whether the control instruction in the control instruction group has been decoded, if so, execute S1004, otherwise execute S1005;

S1004, the current-stage dimmer forwards the received control instruction to the next-stage dimmer, and returns to step S1002;

S1005, the current-stage dimmer decodes the control instruction;

S1006: The current-stage dimmer locks the control instruction and returns to step S1002.

In the control instruction forwarding method provided in the embodiment of the present application, the dimmer decodes and locks the first control instruction received, and forwards the received control instruction that is not locked to the next-level dimmer, thereby reducing the communication bandwidth, thereby reducing EMI or EMC in the development of AM Mini-LED display devices, and manufacturing cost-effective BLU. In addition, the reduction in communication bandwidth means that more dimmers can be connected than in the prior art under the same conditions, so it is expected that a high configuration of the AM Mini-LED display device can be achieved by using more LEDs.

Based on the same concept, an embodiment of the present invention further provides a dimmer, which is applied to a backlight unit. The principle of solving the problem by the dimmer is similar to that of the method, so the implementation of the dimmer can refer to the implementation of the method, and the repeated parts will not be repeated.

As shown in FIG11 , it is a schematic diagram of the structure of a dimmer provided in an embodiment of the present application. The dimmer is applied to a backlight unit, and the dimmer includes:

A receiving module 1101 is used to receive a control instruction group;

A decoding module 1102, configured to decode a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer;

The sending module 1103 is used to filter the target control instruction in the control instruction group, and send the filtered control instruction to the next stage dimmer connected in series with the current dimmer.

In a possible implementation, if the order of the dimmers connected in series is the same as the order of the control instructions corresponding to the dimmers in the control instruction group, the decoding module is specifically configured to:

The first control instruction in the control instruction group is decoded.

In a possible implementation, the dimmer further includes a locking module, and after decoding the first control instruction in the control instruction group, the locking module is used to:

Locking the first control instruction in the control instruction group;

The sending module is specifically used for:

The unlocked control instructions in the received control instruction group are sent to the next stage dimmer connected in series with the current dimmer.

In a possible implementation, the dimmer further includes a determination module, and after receiving the control instruction group and before decoding the target control instruction in the control instruction group, the determination module is configured to:

It is determined that the control instructions in the control instruction group have not been decoded.

In a possible implementation, if the current dimmer is a first-stage dimmer connected in series, the receiving module 1101 is specifically configured to:

Receiving a first control instruction group sent by a dimming controller;

If the current dimmer is the non-first-stage dimmer connected in series, the receiving module 1101 is specifically configured to:

A second control instruction group sent by an upper-level dimmer connected in series with the dimmer is received.

In a possible implementation manner, if the current dimmer is the last-stage dimmer in the dimmers connected in series, the control instruction group is the last control instruction in the first control instruction group.

In a possible implementation, the number of control instructions in the first control instruction group is the same as the total number of dimmers connected in series;

The number of control instructions in the second control instruction group is the difference between the total number of controllers connected in series and the position-related information of the current dimmer, and the position-related information of the current dimmer is the difference between the position of the controller in the controllers connected in series and 1.

In a possible implementation manner, each control instruction in the control instruction group includes a control signal; or

Control signals and dimming data; or

Identification, control signals and dimming data.

Based on the same concept, an embodiment of the present invention further provides a dimmer, which is applied to a backlight unit. Since the dimmer is the dimmer in the method in the embodiment of the present invention, and the principle of solving the problem by the dimmer is similar to that of the method, the implementation of the dimmer can refer to the implementation of the method, and the repeated parts will not be repeated.

The dimmer according to this embodiment of the present invention is described below with reference to Fig. 12. The dimmer shown in Fig. 12 is only an example and should not bring any limitation to the function and application scope of the embodiment of the present invention.

As shown in FIG12 , the dimmer includes a memory 1202 and a processor 1201 , wherein the memory 1202 stores a computer program, and the processor 1201 implements the following steps when executing the computer program:

receiving a control instruction group;

Decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer;

The target control instruction in the control instruction group is filtered, and the filtered control instruction is sent to the next stage dimmer connected in series with the current dimmer.

In a possible implementation manner, if the order of the dimmers connected in series is the same as the order of the control instructions corresponding to the dimmers in the control instruction group, the processor is specifically configured to:

The first control instruction in the control instruction group is decoded.

In a possible implementation manner, after decoding the first control instruction in the control instruction group, the processor is further configured to:

Locking the first control instruction in the control instruction group;

The filtering of the first control instruction in the control instruction group, and sending the filtered control instruction to the next-stage dimmer connected in series with the current dimmer, wherein the processor is specifically configured to:

The unlocked control instructions in the control instruction group are sent to the next-stage dimmer connected in series with the current dimmer.

In a possible implementation manner, after receiving the control instruction group and before decoding the target control instruction in the control instruction group, the processor is further configured to:

It is determined that the control instructions in the control instruction group have not been decoded.

In a possible implementation manner, if the current dimmer is a first-stage dimmer connected in series, the processor is specifically configured to:

Receiving a first control instruction group sent by a dimming controller;

If the current dimmer is the non-first-stage dimmer connected in series, the processor is specifically configured to:

A second control instruction group sent by a previous-stage dimmer connected in series with the current dimmer is received.

In a possible implementation manner, if the current dimmer is the last-stage dimmer in the dimmers connected in series, the control instruction group is the last control instruction in the first control instruction group.

In a possible implementation, the number of control instructions in the first control instruction group is the same as the total number of dimmers connected in series;

The number of control instructions in the second control instruction group is the difference between the total number of controllers connected in series and the position-related information of the current dimmer, and the position-related information of the current dimmer is the difference between the position of the controller in the controllers connected in series and 1.

In a possible implementation manner, each control instruction in the control instruction group includes a control signal; or

Control signals and dimming data; or

Identification, control signals and dimming data.

Based on the same concept, an embodiment of the present invention further provides a backlight unit, comprising a Mini LED and a dimmer as described above, wherein:

The dimmer is used to control the Mini LED connected to the dimmer according to the decoded control instructions.

The principle of solving the problem by the backlight unit is similar to that of the aforementioned dimmer, so the implementation of the backlight unit can refer to the implementation of the aforementioned dimmer, and the repeated parts will not be repeated.

In some possible embodiments, various aspects of the present invention may also be implemented in the form of a program product, which includes a program code. When the program product runs on a terminal device, the program code is used to enable the terminal device to execute the steps of each module in the device for transmitting control instructions according to various exemplary embodiments of the present disclosure described in the above "Exemplary Method" section of this specification, for example, receiving a control instruction group; decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the dimmer; filtering the target control instruction in the control instruction group, and sending the filtered control instruction to the next-level dimmer connected in series with the current dimmer.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

As shown in Figure 13, a program product 130 of a method for controlling instruction transmission according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

A readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, wherein readable program code is carried. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium other than a readable storage medium, which may transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, and the like, as well as conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

It should be noted that although several modules or submodules of the system are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above can be embodied in one module. Conversely, the features and functions of one module described above can be further divided into multiple modules to be embodied.

In addition, although the operations of the modules of the system of the present invention are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some operations may be omitted, multiple operations may be combined into one operation, and/or one operation may be decomposed into multiple operations.

The present application is described above with reference to the block diagrams and/or flow charts showing the methods, devices (systems) and/or computer program products according to the embodiments of the present application. It should be understood that a block of the block diagram and/or flow chart diagram and a combination of blocks of the block diagram and/or flow chart diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer and/or other programmable data processing device to produce a machine, so that the instructions executed by the computer processor and/or other programmable data processing device create a method for implementing the functions/actions specified in the block diagram and/or flow chart block.

Accordingly, the present application may also be implemented with hardware and/or software (including firmware, resident software, microcode, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium, for use by an instruction execution system or in conjunction with an instruction execution system. In the context of the present application, a computer-usable or computer-readable medium may be any medium that may contain, store, communicate, transmit, or convey a program for use by an instruction execution system, device, or apparatus, or in conjunction with an instruction execution system, device, or apparatus.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

A method for transmitting a control instruction, characterized in that it is applied to dimmers connected in series, and the method comprises: receiving a control instruction group; Decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer; The target control instruction in the control instruction group is filtered, and the filtered control instruction is sent to the next stage dimmer connected in series with the current dimmer. The method of claim 1, wherein if the order of the dimmers connected in series is the same as the order of the control instructions corresponding to the dimmers in the control instruction group, decoding the target control instruction in the control instruction group comprises: The first control instruction in the control instruction group is decoded. The method according to claim 2, characterized in that after decoding the first control instruction in the control instruction group, it also includes: Locking the first control instruction in the control instruction group; The filtering the target control instruction in the control instruction group and sending the filtered control instruction to the next-stage dimmer connected in series with the current dimmer includes: The unlocked control instructions in the control instruction group are sent to the next-level dimmer. The method according to claim 1, characterized in that after receiving the control instruction group and before decoding the target control instruction in the control instruction group, it also includes: It is determined that the control instructions in the control instruction group have not been decoded. The method according to claim 2, characterized in that if the current dimmer is a first-stage dimmer connected in series, the receiving control instruction group comprises: Receiving a first control instruction group sent by a dimming controller; If the current dimmer is the non-first-stage dimmer connected in series, the receiving control instruction group includes: receiving a second control instruction group sent by a previous-stage dimmer connected in series with the current dimmer; If the current dimmer is the last dimmer in the series-connected dimmers, the control instruction group is the last control instruction in the first control instruction group. The method according to claim 5, characterized in that the number of control instructions in the first control instruction group is the same as the total number of dimmers connected in series; The number of control instructions in the second control instruction group is the difference between the total number of controllers connected in series and the position-related information of the current dimmer, and the position-related information of the current dimmer is the difference between the position of the current controller in the controllers connected in series and 1. The method according to any one of claims 1 to 6, characterized in that each control instruction in the control instruction group comprises a control signal; or Control signals and dimming data; or Identification, control signals and dimming data. A dimmer, characterized by comprising: A receiving module, used for receiving a control instruction group; A decoding module, used for decoding a target control instruction in the control instruction group, wherein the target control instruction is a control instruction corresponding to the current dimmer; The sending module is used to filter the target control instructions in the control instruction group, and send the filtered control instructions to the next-stage dimmer connected in series with the current dimmer. A dimmer, characterized in that it comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the control instruction transmission method according to any one of claims 1 to 7 when executing the computer program. A backlight unit, characterized by comprising a Mini LED and a plurality of dimmers as claimed in claim 9 connected in series, wherein: The dimmer is used to control the Mini LED connected to the dimmer according to the decoded control instructions.