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WO2018123813A1 - Dispositif d'affichage intégré avec panneau tactile - Google Patents

Dispositif d'affichage intégré avec panneau tactile Download PDF

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Publication number
WO2018123813A1
WO2018123813A1 PCT/JP2017/045946 JP2017045946W WO2018123813A1 WO 2018123813 A1 WO2018123813 A1 WO 2018123813A1 JP 2017045946 W JP2017045946 W JP 2017045946W WO 2018123813 A1 WO2018123813 A1 WO 2018123813A1
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WO
WIPO (PCT)
Prior art keywords
signal lines
display device
common electrode
touch panel
wiring
Prior art date
Application number
PCT/JP2017/045946
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English (en)
Japanese (ja)
Inventor
一順 光本
冨永　真克
Original Assignee
シャープ株式会社
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Filing date
Publication date
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Publication of WO2018123813A1 publication Critical patent/WO2018123813A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the present invention relates to a touch panel integrated display device.
  • a display device with a touch panel provided with a touch sensor mechanism for detecting a touch position of a user's finger or pen has been widely used.
  • a so-called in-cell touch panel integrated display device in which a touch sensor mechanism is provided in a display panel is known (see, for example, Patent Document 1 below).
  • a structure in which all the components of the touch sensor mechanism are provided inside the display panel is called a full-in-cell type.
  • the electrodes in the display panel are used as touch sensor electrodes.
  • a common electrode for supplying a common voltage to the pixels of the liquid crystal display panel can be divided into a plurality of parts and used as touch sensor electrodes.
  • FIG. 12 is a plan view showing a schematic configuration of a conventional full-in-cell touch panel integrated display device.
  • a plurality of touch sensor electrodes 901 are formed by dividing a common electrode for supplying a common voltage to pixels.
  • a sensor line 902 (902a to 902d) is connected to each of the touch sensor electrodes 901.
  • the sensor line 902 is connected to the controller 903 outside the display area.
  • the controller 903 supplies a common voltage for driving the pixel to the touch sensor electrode 901 via the sensor line 902 during the display period of the pixel.
  • the touch sensor electrode 901 functions as a counter electrode (also referred to as a common electrode) that generates an electric field for driving the liquid crystal so as to face the pixel electrode during a pixel display period.
  • a touch drive signal for causing the touch sensor electrode 901 to perform a sensing operation is supplied to the touch sensor electrode 901 via the sensor line 902.
  • the present invention reduces the difference in wiring resistance between signal lines that supply signals to the counter electrode (common electrode), thereby making the auxiliary capacitance in the display area uniform and causing inconvenience such as display unevenness.
  • the purpose is to eliminate.
  • a touch panel integrated display device disclosed below is: An active matrix substrate; A counter substrate facing the active matrix substrate; A liquid crystal layer sandwiched between the active matrix substrate and the counter substrate; A plurality of pixel electrodes formed on the active matrix substrate; A plurality of common electrodes formed on the active matrix substrate and forming capacitances with the plurality of pixel electrodes; A controller disposed on the active matrix substrate and generating a control signal for the plurality of common electrodes; A plurality of signal lines connecting the controller and each of the plurality of common electrodes, Among the plurality of signal lines, at least a part of the signal lines connected to the common electrode other than the common electrode farthest from the controller has a folded portion in the region where the common electrode is formed.
  • the auxiliary capacitance in the display area can be made uniform, and problems such as display unevenness can be eliminated. it can.
  • FIG. 1 is a cross-sectional view of a display device with a touch panel according to the first embodiment.
  • FIG. 2 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate.
  • FIG. 3 is an enlarged view of a part of the active matrix substrate.
  • FIG. 4 is a plan view showing the positional relationship between signal lines and gate and source lines.
  • FIG. 5 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the second embodiment.
  • FIG. 6 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the third embodiment.
  • FIG. 1 is a cross-sectional view of a display device with a touch panel according to the first embodiment.
  • FIG. 2 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate.
  • FIG. 3 is an enlarged view
  • FIG. 7 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the first modification.
  • FIG. 8 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the second modification.
  • FIG. 9 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the third modification.
  • FIG. 10 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the fourth modification.
  • FIG. 8 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the second modification.
  • FIG. 9 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate in the touch panel integrated display device according to the third modification.
  • FIG. 11 is a plan view showing an example of the arrangement of common electrodes and signal lines formed on an active matrix substrate in a touch panel integrated display device according to Modification 5.
  • FIG. 12 is a schematic diagram showing the arrangement of common electrodes and signal lines in a conventional touch panel integrated display device.
  • the touch panel integrated display device is: An active matrix substrate; A counter substrate facing the active matrix substrate; A liquid crystal layer sandwiched between the active matrix substrate and the counter substrate; A plurality of pixel electrodes formed on the active matrix substrate; A plurality of common electrodes formed on the active matrix substrate and forming capacitances with the plurality of pixel electrodes; A controller disposed on the active matrix substrate and generating a control signal for the plurality of common electrodes; A plurality of signal lines connecting the controller and each of the plurality of common electrodes, Among the plurality of signal lines, at least a part of the signal lines connected to the common electrode other than the common electrode farthest from the controller has a folded portion in the region where the common electrode is formed.
  • the signal lines connected to the common electrode other than the common electrode farthest from the controller among the plurality of signal lines has a folded portion in a region where the common electrode is formed. .
  • the wiring length of the signal line is increased by the folded portion, so that the difference in wiring resistance with the signal line connected to the common electrode farthest from the controller is reduced. .
  • the difference in the supply voltage to the common electrode due to the difference in the wiring resistance of the signal line is alleviated, the auxiliary capacitance in the display area can be made uniform, and inconveniences such as display unevenness can be eliminated.
  • the touch panel integrated display device includes the first configuration,
  • the active matrix substrate further includes a gate wiring and a source wiring,
  • the folded portion is disposed so as to overlap with at least one of the gate wiring and the source wiring in a plan view.
  • the folded portion of the signal line is arranged so as to overlap at least one of the gate wiring and the source wiring in plan view, thereby suppressing the influence of the folded portion on the transmittance of the pixel. it can.
  • the touch panel integrated display device is the first or second configuration
  • the plurality of signal lines have substantially the same wiring resistance between the connection terminal with the controller and the contact with the common electrode.
  • the folded portion is formed in the signal line so that the wiring resistance between the connection terminal with the controller and the contact with the common electrode is substantially equal.
  • the length of the folded portion is reduced so as to reduce the difference in the wiring length. Etc. can be determined.
  • the touch panel integrated display device includes any one of the first to third configurations.
  • Each of the plurality of signal lines includes a dummy extension line, In the plurality of signal lines, the area overlapping the common electrode is substantially equal.
  • the area where the plurality of signal lines including the dummy extension lines overlap with the common electrode is almost uniform for all the signal lines.
  • the load capacity of the signal line is also made uniform, so the difference in supply voltage to the common electrode can be more effectively reduced.
  • the auxiliary capacity in the display area can be made more uniform, and inconveniences such as display unevenness can be more effectively eliminated.
  • the touch panel integrated display device is the touch panel integrated display device according to the fourth configuration, wherein each of the plurality of signal lines including the dummy extension lines has the same pattern in a plan view in the region where the common electrode is formed. Is formed.
  • the plurality of signal lines including the dummy extension lines are formed in the same pattern in a plan view in the display area, there is an advantage that the signal lines are hardly visible.
  • the touch panel integrated display device is the redundant wiring connected to each of the plurality of signal lines and connected to the signal lines in any of the first to fifth configurations. Is further provided.
  • the redundant wiring is provided so as to run in parallel with respect to each of the plurality of signal lines, there is an advantage that even if the signal line is disconnected, it is difficult to cause a malfunction. In addition, there is an effect that the wiring resistance of the signal line can be reduced.
  • a plurality of contacts for connecting the signal line and the common electrode are provided in each of the plurality of signal lines. It is the structure which was made.
  • each signal line is provided with a plurality of contacts for connecting the signal line and the common electrode, there is an advantage that even if there is a contact failure, it is difficult to cause an operation failure. In addition, there is an effect that the contact resistance can be reduced.
  • the touch panel integrated display device is a configuration in which meandering portions are provided in at least a part of the plurality of signal lines in any of the first to seventh configurations.
  • the wiring length can be adjusted not only by the folded portion but also by the meandering portion. Thereby, an area
  • the touch panel integrated display device is the configuration in which the meandering portion is provided at a position overlapping the common electrode to which the signal line provided with the meandering portion is connected in the eighth configuration.
  • the meandering portion provided in each signal line is provided at a position overlapping the common electrode to which the signal line is connected. Therefore, there is an effect that the capacitance formed between the other common electrodes can be reduced.
  • the touch panel integrated display device is the configuration in which the meandering portion is provided in the lead-out wiring area in the eighth configuration.
  • the wiring length of the signal line can be adjusted by the meandering portion provided in the lead-out wiring portion (that is, outside the display area). Thereby, there is an effect that the wiring resistance and the parasitic capacitance in the display area can be reduced.
  • FIG. 1 is a cross-sectional view of a touch panel integrated display device (hereinafter simply referred to as a “display device”) 10 according to the first embodiment.
  • the display device 10 includes an active matrix substrate 1, a counter substrate 2, and a liquid crystal layer 3 sandwiched between the active matrix substrate 1 and the counter substrate 2.
  • Each of the active matrix substrate 1 and the counter substrate 2 is provided with a glass substrate that is substantially transparent (having high translucency).
  • the counter substrate 2 includes a color filter (not shown).
  • the display device 10 includes known components such as a backlight and a polarizing plate.
  • the display device 10 has a function of displaying an image and a touch sensor mechanism in order to have a function of detecting position information (touch position) input by the user based on the displayed image.
  • the display device 10 is a so-called full-in-cell touch panel integrated display device in which a touch sensor mechanism (electrodes, wiring, etc. for detecting a touch) is provided inside the display panel.
  • the driving method of the liquid crystal molecules contained in the liquid crystal layer 3 is a horizontal electric field driving method.
  • the pixel electrode and the common electrode for forming an electric field for driving the liquid crystal are formed on the active matrix substrate 1.
  • FIG. 2 is a diagram showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate 1.
  • the plurality of common electrodes 21 are formed on the surface of the active matrix substrate 1 on the liquid crystal layer 3 side. As shown in FIG. 2, the common electrode 21 has a rectangular shape, and a plurality of common electrodes 21 are arranged in a matrix on the active matrix substrate 1. 2 shows the common electrodes 21 having two columns in the X direction and only four rows in the Y direction for the sake of simplification, the number of common electrodes is not limited to this and is arbitrary. .
  • the active matrix substrate 1 is provided with a controller 20.
  • the controller 20 performs control for displaying an image and control for detecting a touch position.
  • the controller 20 and each common electrode 21 are connected by a signal line 22 extending in the Y-axis direction. That is, the same number of signal lines 22 as the number of common electrodes 21 are formed on the active matrix substrate 1.
  • the common electrode 21 is paired with a pixel electrode and is used for image display control and also for touch position detection control.
  • the common electrode 21 has a parasitic capacitance between the adjacent common electrode 21 and the like.
  • a capacitance is formed between the common electrode 21 and the human finger, the touch pen, or the like, so that the capacitance of the common electrode 21 increases.
  • the controller 20 supplies a touch drive signal to the common electrode 21 via the signal line 22 and receives the touch detection signal via the signal line 22.
  • the signal line 22 functions as a line for transmitting and receiving a touch drive signal and a touch detection signal.
  • FIG. 3 is an enlarged view of a part of the active matrix substrate 1.
  • the plurality of pixel electrodes 31 are arranged in a matrix.
  • TFTs thin film transistors
  • the common electrode 21 is provided with a plurality of slits 21 a in a portion overlapping the pixel electrode 31. This is to improve the transmittance of the pixel.
  • a gate wiring 32 and a source wiring 33 are provided around the pixel electrode 31.
  • the gate wiring 32 extends in the X-axis direction, and a plurality of gate wirings 32 are provided at predetermined intervals along the Y-axis direction.
  • the source wiring 33 extends in the Y-axis direction, and a plurality of source wirings 33 are provided at predetermined intervals along the X-axis direction. That is, the gate wiring 32 and the source wiring 33 are formed in a lattice shape, and the pixel electrode 31 is provided in a region partitioned by the gate wiring 32 and the source wiring 33.
  • the signal line 22 extending in the Y-axis direction is arranged so as to partially overlap the source wiring 33 extending in the Y-axis direction in the normal direction of the active matrix substrate 1. Yes.
  • the signal line 22 is provided in an upper layer than the source wiring 33, and the signal line 22 and the source wiring 33 partially overlap in plan view.
  • the common electrode 21 and the signal line 22 are connected via a contact 35.
  • the signal line 22a connected to the common electrode 21a farthest from the controller 20 does not have a folded portion and is straight from the controller 20 to the contact 35a.
  • the signal lines 22b, 22c, 22d connected to the common electrodes 21b, 21c, 21d close to the controller 20 have folded portions 22b1, 22c1, 22d1, respectively.
  • the “folded portion” refers to a portion where the signal line 22 extends in a different direction from a portion where the signal line 22 extends in one direction (in FIG. 2, the connection terminal of the controller 20 starts in the Y direction).
  • the folded portion 22b1 of the signal line 22b includes a first portion 22b1x extending along the X direction and a second portion 22b1y extending downward in the Y direction.
  • the folded portion 22c1 of the signal line 22c is configured by a first portion 22c1x extending along the X direction and a second portion 22c1y extending downward in the Y direction.
  • the folded portion 22d1 of the signal line 22d is composed of a first portion 22d1x extending along the X direction and a second portion 22d1y extending downward in the Y direction.
  • the lengths of the folded portions 22b1, 22c1, and 22d1 of the signal lines 22b, 22c, and 22d are designed so that the wiring lengths of these signal lines are substantially equal to the wiring length of the signal line 22a.
  • the signal lines 22a to 22d have a uniform wiring width.
  • the wiring length of the signal line 22a (the wiring length from the connection terminal of the controller 20 to the contact 35a) is L22a
  • the wiring length of the signal line 22b is L22b
  • the distance from the controller 20 to the contact 35b of the common electrode 21b is L35b.
  • the wiring length L22d of the signal line 22d is set such that the distance from the controller 20 to the contact 35d of the common electrode 21d is L35d, the length of the first portion 22d1x of the folded portion 22d1 is L22d1x, and the length of the second portion 22d1y.
  • L22d1y, L22d L35d + 2 ⁇ L22d1y + L22d1x It can be expressed by the formula L22a and L22d are substantially equal.
  • the signal lines 22b to 22d other than the longest signal line 22a are provided with folded portions so that the wiring lengths of the signal lines 22a to 22d are substantially equal. Since the signal lines 22a to 22d have the same wiring width, the wiring lines of the signal lines 22a to 22d that connect the controller 20 and the common electrodes 21a to 21d are provided by providing the folded portions so that the wiring lengths are equal. The resistance is made uniform. As a result, display unevenness due to the potential difference between the auxiliary capacitors can be suppressed.
  • the first portions 22b1x, 22c1x, and 22d1x extending along the X direction overlap the gate wiring 32 in plan view.
  • the second portions 22b1y, 22c1y, and 22d1y extending along the Y direction are arranged so as to overlap the source wiring 33 in plan view.
  • the folded portion of the signal line 22 does not affect the transmittance of the pixel. .
  • the length of the folded portion of the signal lines 22b to 22d is determined so that the wiring lengths of the signal lines 22a to 22d are substantially equal. Most preferred. However, even if there is a slight difference in the wiring lengths of the signal lines 22a to 22d, the object of the invention can be achieved if the display unevenness caused by the difference in wiring resistance is within an allowable level. Therefore, the wiring length of the signal lines 22a to 22d is not necessarily uniform.
  • the width of the signal line 22 is substantially uniform. However, if there is a portion where the width is different in the signal line 22, the wiring of the signal lines 22a to 22d is taken into account. The length of the folded portion may be determined so that the resistance is made uniform.
  • FIG. 5 is a diagram showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the touch panel integrated display device according to the second embodiment.
  • the wiring length of the signal line 22 is not uniform in the lead-out wiring area 41 outside the display area 40. That is, among the signal lines 22 (22a to 22p) shown in FIG. 5, the signal line 22p has the shortest wiring length and the signal line 22a has the longest wiring length in the lead-out wiring area 41.
  • the length of the folded portion in each of the signal lines 22a to 22p is designed so as to cancel out the difference in the wiring length in the lead-out wiring area 41.
  • the signal line 22a to 22p has a substantially uniform wiring length (the length from the connection terminal to the controller 20 to the contact 35).
  • the wiring resistance of the signal lines 22a to 22p is made uniform.
  • the voltages supplied to the common electrodes 21a to 21p are uniform, and display unevenness due to the potential difference of the auxiliary capacitors can be suppressed.
  • the object of the invention can be achieved if the display unevenness caused by the difference in wiring resistance is within an allowable level. Therefore, the wiring lengths of the signal lines 22a to 22p are not necessarily uniform.
  • the width of the signal line 22 is substantially uniform. However, if there is a portion with a different width in the signal line 22, the wiring of the signal lines 22 a to 22 p is taken into account. The length of the folded portion may be determined so that the resistance is made uniform.
  • FIG. 6 is a diagram showing an example of the arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the touch panel integrated display device according to the third embodiment.
  • the touch panel integrated display device according to the present embodiment has a configuration in which each signal line 22 includes a dummy extension line 52 in addition to the configuration of the touch panel integrated display device according to the second embodiment. is there.
  • the dummy extension line 52 is schematically indicated by a broken line, but the actual dummy extension line is a continuous line.
  • the dummy extension line 52 is formed in the same layer as the signal line 22 using the same material as the signal line 22.
  • the width of the dummy extension line 52 is substantially the same as that of the signal line 22.
  • the dummy extension line 52 is provided along the Y direction so as to compensate for a short portion in the Y direction for each of the signal lines 22.
  • the signal line 22a when the signal line 22a is viewed from the connection terminal of the controller 20 as a starting point, the signal line 22a extends upward from the connection terminal of the controller 20 in the Y direction, and once extends in the X direction at a point P1 in the common electrode 21d. Extends downward in the Y direction, extends in the X direction at the point P3, extends upward in the Y direction at the point P4, and reaches the contact 35a of the common electrode 21a through the common electrodes 21c and 21b.
  • the dummy extension line 52a of the signal line 22a includes a first portion 52a1 extending upward in the Y direction from the point P1, a second portion 52a2 extending upward in the Y direction from the point P2, and a third portion extending upward in the Y direction from the contact 35a. Part 52a3.
  • the upper ends in the Y direction of the first portion 52a1, the second portion 52a2, and the third portion 52a3 of the dummy extension line 52a are at the same position in the Y direction.
  • the signal line 22a and the dummy extension line 52a are in a connected state at the point P1, the point P2, and the contact 35a.
  • the dummy extension line 52 a does not contribute as a signal line for transmitting the touch detection signal of the common electrode 21 a to the controller 20.
  • the signal line 22b when the signal line 22b is viewed from the connection terminal of the controller 20 as a starting point, the signal line 22b extends upward from the connection terminal of the controller 20 in the Y direction, and once extends in the X direction at a point P5 in the common electrode 21c. It extends downward in the Y direction at the point P6, extends in the X direction at the point P7 in the common electrode 21d, extends upward in the Y direction at the point P8, and reaches the contact 35b of the common electrode 21b through the common electrode 21c.
  • the dummy extension line 52b of the signal line 22b includes a first portion 52b1 extending upward in the Y direction from the point P5, a second portion 52b2 extending upward in the Y direction from the point P6, and a third portion extending upward in the Y direction from the contact 35b. Part 52b3.
  • the upper ends in the Y direction of the first portion 52b1, the second portion 52b2, and the third portion 52b3 of the dummy extension line 52b are at the same position in the Y direction, and the first portion of the dummy extension line 52a
  • the upper end portions in the Y direction of 52a1, the second portion 52a2, and the third portion 52a3 are at the same position.
  • the signal line 22b and the dummy extension line 52b are in a connected state at the point P5, the point P6, and the contact 35b.
  • the dummy extension line 52 b does not contribute as a signal line for transmitting the touch detection signal of the common electrode 21 b to the controller 20.
  • dummy extension lines 52c to 52p are provided for the other signal lines 22c to 22p.
  • the signal lines 22a to 22p including the dummy extension lines 52a to 52p have a common pattern in plan view in the region where the common electrode 21 is provided.
  • the signal lines 22a to 22p including the dummy extension lines 52a to 52p all have the same wiring area overlapping the common electrode 21.
  • the wiring area where the signal lines 22a to 22p and the common electrode 21 overlap is made substantially uniform for all the signal lines, so that the load capacity for each wiring is substantially reduced. It can be made uniform. Further, since the dummy extension line 52 is a wiring that does not contribute as a signal line, the uniformity of the wiring resistance of the signal line 22 is not affected by the dummy extension line 52.
  • the wiring resistance of the signal line 22 substantially uniform by the folded portion, it is possible to suppress display unevenness due to the potential difference of the auxiliary capacitance, and to make the wiring load capacitance substantially uniform. Therefore, the voltage supplied to the common electrode 21 becomes uniform, display unevenness due to the potential difference of the auxiliary capacitance can be more effectively suppressed, and uniform display can be realized in the entire display area.
  • the dummy extension line 52 is provided so as to compensate for a short portion in the Y direction in the signal line 22, and the signal lines 22a to 22p including the dummy extension lines 52a to 52p are connected to the common electrode 21.
  • the common pattern was formed in plan view.
  • the pattern of the dummy extension line 52 is not limited to this specific example. That is, any pattern can be adopted as long as the wiring area where the signal line 22 including the dummy extension line 52 and the common electrode 21 overlap is substantially uniform for all the signal lines 22.
  • Modification 1 is a modification of the first embodiment.
  • FIG. 7 is a diagram illustrating an arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the first modification. As shown in FIG. 7, in the first modification, redundant wirings 22A to 22D are provided so as to run in parallel to the signal lines 22a to 22d, respectively. The redundant wirings 22A to 22D are connected to the signal lines 22a to 22d in the vicinity of the controller 20 (outside the pixel area).
  • connection line 22aA The signal line 22a and the redundant wiring 22A are connected by a connection line 22aA.
  • the connection line 22aA may be provided in at least one place between the signal line 22a and the redundant wiring 22A. However, the provision of the connection line 22aA in a plurality of places is effective in preventing malfunction due to disconnection described later. It is preferable in terms.
  • connection lines 22bB to 22dD are provided at least at one place (preferably a plurality of places) between the signal lines 22b to 22d and the redundant wirings 22B to 22D.
  • Modification 2 is another modification of the first embodiment.
  • FIG. 8 is a diagram showing an arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the second modification. As shown in FIG. 8, in the second modification, two redundant contacts 35a1 are provided on the signal line 22a on the side closer to the controller 20 than the contact 35a. Further, the signal line 22a is extended from the contact 35a, and two redundant contacts 35a2 are provided in the extended portion. That is, in Modification 2, the signal line 22a and the common electrode 21a are connected by a total of five contacts (contact 35a, two redundant contacts 35a1, and two redundant contacts 35a2).
  • the redundant contact 35b1 and the redundant contact 35b2 are provided between the signal line 22b and the common electrode 21b in addition to the contact 35b. The same applies to the signal lines 22c to 22d.
  • the redundant contacts 35a1 ⁇ a2 to 35d1 ⁇ d2 are provided, so that the modified example 2 has a poor contact.
  • the contact resistance connection resistance between the signal line 22 and the common electrode 21
  • FIG. 9 is a diagram illustrating an arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the third modification.
  • a meandering portion 22b2 is provided in a portion of the signal line 22b that overlaps the common electrode 21b.
  • a meandering portion 22c2 is provided in a portion overlapping the common electrode 21c. The same applies to the signal line 22d.
  • the meandering portion of the signal line 22 means a portion extending in a direction that forms an angle with respect to the extending direction of the signal line 22.
  • the meandering portion can be configured in an arbitrary shape on condition that the meandering portion does not intersect with other portions of the signal line 22.
  • the wiring lengths of the meandering portions 22b2 to 22d2 are preferably adjusted in consideration of the wiring lengths of the folded portions 22b1 to 22d1 (see FIG. 2) so that the total wiring lengths of the signal lines 22a to 22d are equal to each other.
  • the signal lines 22b to 22d are provided with meandering portions 22b2 to 22d2 in addition to the folded portions 22b1 to 22d1 (see FIG. 2), so that the wiring of the signal lines 22b to 22d can be effectively utilized.
  • the length can be increased.
  • the meandering portion 22b2 of the signal line 22b in a region overlapping the common electrode 21b, the capacitance formed between the other segments (common electrodes 21a, 21c, and 21d) can be reduced.
  • FIG. 9 illustrates the configuration in which the signal lines 22b to 22d are provided with meandering portions
  • the number of signal lines provided with meandering portions is arbitrary.
  • a meandering portion may be provided only on the signal lines 22c to 22d, or a meandering portion may be provided only on the signal line 22d.
  • Modification 4 is a modification of the second embodiment.
  • FIG. 10 is a diagram illustrating an arrangement of common electrodes and signal lines formed on the active matrix substrate 1 in the fourth modification. As shown in FIG. 10, in the fourth modification, meandering portions 22b3 to 22p3 are provided in the lead-out wiring area 41 for the signal lines 22b to 22p, respectively.
  • the wiring length of the meandering portions 22b3 to 22p3 is preferably adjusted in consideration of the wiring length of the folded portion in the display area (common electrode area) so that the total wiring length of the signal lines 22a to 22p is equal to each other. . That is, as can be seen from a comparison between FIG. 5 and FIG. 10, in the modified example 4, the wiring length of the folded portion in the display area is reduced by the amount of the meandering portions 22b3 to 22p3. .
  • the modification 4 is characterized in that meandering portions 22b3 to 22p3 for reducing the difference in wiring length between the signal lines 22a to 22p are provided in the lead-out line area 41.
  • the wiring length of the display area (common electrode area) can be shortened by the meandering portions 22b3 to 22p3.
  • the wiring resistance and parasitic capacitance in the display area can be reduced.
  • FIG. 11 shows a configuration (Modification 5) in which the dummy extension line described in the third embodiment is combined with the redundant wiring of Modification 1.
  • the dummy extension line 53a of the signal line 22a extends from the contact 35a in the Y direction upward, then extends in the X direction, and further extends downward in the Y direction.
  • the second portion 53a12 extends from the contact 35A of 22A upward in the Y direction, then extends in the X direction, and further extends downward in the Y direction.
  • the dummy extension line 53b of the signal line 22b includes first to fourth parts 53b1 to 53b4 extending upward from the part where the signal line 22b extends along the X direction, and contacts 35b and 35B. And fifth and sixth portions 53b5 and 53b6 extending downward in the Y direction.
  • the first to sixth portions 53b1 to 53b6 are provided on extension lines of portions extending in the Y direction in the signal line 22b and the redundant wiring 22B.
  • dummy extension lines are provided for the signal line 22c and the redundant wiring 22C, and the signal line 22d and the redundant wiring 22D.
  • the dummy extension line 53 is connected to the signal lines 22a to 22d and the redundant wirings 22A to 22D. However, the dummy extension line 53 does not contribute as a signal line for transmitting the touch detection signal of the common electrode 21 to the controller 20.
  • SYMBOLS 1 Active matrix substrate, 2 ... Counter substrate, 3 ... Liquid crystal layer, 10 ... Touch panel integrated display device, 20 ... Controller, 21 ... Common electrode, 22 ... Signal line, 22A-22D ... Redundant wiring, 31 ... Pixel electrode, 32 ... Gate wiring, 33 ... Source wiring, 35 ... Contact, 40 ... Display area, 41 ... Lead-out line area, 52 ... Dummy extension line, 53 ... Dummy extension line

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Chemical & Material Sciences (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)

Abstract

La présente invention concerne un dispositif d'affichage intégré à un panneau tactile entièrement intégré qui peut minimiser la différence dans les résistances de câblage de lignes de signal pour fournir des signaux à une électrode commune et ainsi homogénéiser la capacité auxiliaire dans une zone d'affichage et résoudre le problème d'inégalité d'affichage ou similaire. Le dispositif d'affichage intégré à un panneau tactile comprend : une pluralité d'électrodes de pixel formées sur un substrat de matrice active 1; une pluralité d'électrodes communes 21 qui créent une capacité avec la pluralité d'électrodes de pixel; un dispositif de commande 20 disposé sur le substrat de matrice active 1 et générant un signal de commande pour la pluralité d'électrodes communes; et une pluralité de lignes de signal 22 qui connectent le dispositif de commande 20 à chacune de la pluralité d'électrodes communes 21. Chaque ligne de signal 22b, 22c, et 22d parmi la pluralité de lignes de signal 22 qui est connectée à une électrode commune à l'exclusion de l'électrode commune la plus éloignée du contrôleur 20 comprend une partie pliée 22b1, 22c1 ou 22d1 dans une région où l'électrode commune est formée.
PCT/JP2017/045946 2016-12-26 2017-12-21 Dispositif d'affichage intégré avec panneau tactile WO2018123813A1 (fr)

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DE112020001859T5 (de) 2019-04-10 2021-12-30 Panasonic Intellectual Property Management Co., Ltd. Anzeigesystem, Steuerungsvorrichtung und Steuerungsverfahren
US11847279B2 (en) 2019-08-07 2023-12-19 Panasonic Intellectual Property Management Co., Ltd. Display system, control device, and control method
CN113853574B (zh) * 2019-08-07 2024-05-10 松下汽车电子系统株式会社 显示系统、控制装置及控制方法
DE112020003745T5 (de) 2019-08-07 2022-05-12 Panasonic Intellectual Property Management Co., Ltd. Anzeigesystem, steuervorrichtung und steuerverfahren
DE112020003747T5 (de) 2019-08-07 2022-05-05 Panasonic Intellectual Property Management Co., Ltd. Anzeigesystem, steuervorrichtung und steuerverfahren
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US11586310B2 (en) 2019-08-07 2023-02-21 Panasonic Intellectual Property Management Co., Ltd. Display system and control method
CN113853574A (zh) * 2019-08-07 2021-12-28 松下知识产权经营株式会社 显示系统、控制装置及控制方法
WO2021024745A1 (fr) * 2019-08-07 2021-02-11 パナソニックＩｐマネジメント株式会社 Système d'affichage, dispositif de commande et procédé de commande
JP7460871B2 (ja) 2019-08-07 2024-04-03 パナソニックオートモーティブシステムズ株式会社 表示システム、制御装置および制御方法
KR20210085388A (ko) * 2019-12-30 2021-07-08 엘지디스플레이 주식회사 터치 디스플레이 장치
KR102741706B1 (ko) 2019-12-30 2024-12-12 엘지디스플레이 주식회사 터치 디스플레이 장치
US11941205B2 (en) 2020-03-27 2024-03-26 Panasonic Intellectual Property Management Co., Ltd. Display system, control device, and control method that apply a touch drive signal including a harmonic to common electrodes
DE102021116823A1 (de) 2020-07-01 2022-01-05 Panasonic Intellectual Property Management Co., Ltd. Anzeigegerät, Steuergerät und Steuerverfahren
US11354004B2 (en) 2020-07-01 2022-06-07 Panasonic Intellectual Property Management Co., Ltd. Display device, control device, and control method
CN113253872A (zh) * 2021-05-24 2021-08-13 武汉华星光电技术有限公司 触控面板和显示装置
CN113253872B (zh) * 2021-05-24 2023-11-28 武汉华星光电技术有限公司 触控面板和显示装置

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