JP2010107267A - Display device for vehicle - Google Patents

Abstract

An object of the present invention is to provide a vehicular display device capable of obtaining good visibility by extending the distance (focal length) between a dial and a viewer as compared with the prior art.
A dial (5, 6), a pointer (9), a movement (8) and a substrate (7) are stored in a storage space formed by a back cover (2) and a front cover (3). In the vehicular display device, the dial plate (5, 6) is arranged on the inner wall of the back cover (2), the substrate (7) is arranged in front of the dial plate (5, 6), and the movement (8 ) Is mounted on the front side of the substrate (7), and the drive shaft (8a) of the movement (8) penetrates the back side of the substrate (7) and projects to the dial (5, 6) side, at its tip The pointer (9) is attached, and the front glass (4) is attached to the opening (3a) formed in the front cover (3) so that the dial (5, 6) can be seen from the front. .
[Selection] Figure 2

Description

  The present invention relates to a vehicle display device.

  2. Description of the Related Art Conventionally, a vehicular display device including a first display unit including a pointer display and a second display unit including a liquid crystal display has a configuration as disclosed in Japanese Patent Application Laid-Open No. 2005-24306. is there.

  As shown in FIG. 7, this vehicle display device is a speedometer that represents the speed of the vehicle, for example, and includes a pointer 22, a dial plate 23, a display 24, and a faceplate 25.

  The pointer 22 is illuminated by the pointer light source 29 and rotates on the dial 23. The dial plate 23 includes indicator portions 23 a and 23 aa that are transmitted and illuminated by the dial light source 30. A window 26 through which the display 24 is exposed is provided below the dial 23. The indicator 23aa is a scale and is close to the display 24. The other indicator portion 23a includes characters, symbols, and the like representing the speed represented by a square in addition to the scale.

  The dial plate 23 is a transparent synthetic resin plate-like body, and a portion other than the indicator portions 23a and 23aa is provided with a light shielding layer formed of a light shielding paint. A frame 27 made of synthetic resin is provided behind the dial plate 23. A circuit board 28 is provided behind the frame 27. The circuit board 28 is provided with light emitting diodes serving as a pointer light source 29 and a dial light source 30. A movement M for rotationally driving the pointer 22 is provided on the back side of the circuit board 28.

  The frame 27 includes a pointer illumination chamber 27a for accommodating the pointer light source 29 and a dial illumination chamber 27b for accommodating the dial light source 30, and a cylindrical wall 27c forming the pointer illumination chamber 27a. Thus, the pointer illumination chamber 27a and the dial illumination chamber 27b are separated. The dial illumination chamber 27b illuminates the indicator portion 23a with the dial light source 30.

  The display 24 holds a liquid crystal display element 31 that is a transmissive display unit, a liquid crystal light source 32 that is a light source for a transmissive display unit that transmits and illuminates the liquid crystal display element 31, and a liquid crystal light source. And a liquid crystal holder 33 for storing 32. The liquid crystal light source 32 is a surface-mounted light emitting diode. The liquid crystal display element 31 is electrically connected to the circuit board 28 by a plurality of lead pins 34.

In this configuration, all the light sources such as the pointer light source 29 and the dial plate light source 30 are mounted on the circuit board 28 disposed on the back side of the dial plate 23, and the movement M for driving the pointer 22 is the circuit board. The drive shaft of the movement M extends through the circuit board 28 to the front side of the circuit board 28.
Japanese Patent Laying-Open No. 2005-024306

  However, in the above-described configuration of the vehicle display device, the circuit board 28 on which the movement M is mounted is arranged on the back side of the dial plate 23 and the partition wall of the light source is provided. When the structure becomes thick and assembled to the vehicle, the distance (focal length) of the dial plate 23 from the viewer is reduced by the thickness. For this reason, when the vehicle display device is stored in the storage portion of the vehicle display device in the vehicle, the distance (focal length) between the dial plate 23 and the viewer may become short, and good visibility may not be obtained. There is a problem.

  Further, since the distance (focal length) of the dial plate 23 from the viewer is short, when the dial plate 23 is viewed from different directions, there may be a difference in the indicated position of the pointer 22. There is also.

  Therefore, in view of the above-described problems, the present invention has an object to provide a vehicle display device that can obtain better visibility by extending the distance (focal length) between the dial and the viewer than before. Yes.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that the storage space formed by the back cover (2) and the front cover (3) has a dial (5, 6), a pointer (9), and a movement. (8) and the substrate (7) are housed, and the front glass (4) is placed in the opening (3a) formed in the front cover (3) so that the dial (5, 6) can be seen from the front. The vehicle display device is attached, wherein the dial (5, 6) is disposed on an inner wall of the back cover (2), and the substrate (7) is mounted on the dial (5, 6). The movement (8) is mounted on the front side of the substrate (7), and the drive shaft (8a) of the movement (8) passes through the back side of the substrate (7) and is placed on the dial. It protrudes to the (5, 6) side, and the pointer (9) is attached to its tip. To.

  According to a second aspect of the present invention, there is provided a vehicle display device according to the first aspect, wherein the dial is disposed so as to be in close contact with the inner wall of the back cover (2). It comprises a light (5) and a transparent display board (6) disposed on the backlight (5) and provided with an index (6A).

  The invention according to claim 3, which has been made in order to solve the above-described problem, is the vehicle display device according to claim 1 or 2, wherein the pointer (9) is shined on the back side of the substrate (7). The pointer illumination light source (12) is arranged, and the backlight (5) is fed from the substrate (7).

  Note that the reference numerals in parentheses in the description of the means for solving the above-described problems correspond to the reference numerals in the description of the best mode for carrying out the invention below. It does not limit the interpretation of the range.

  According to the present invention, the dial is disposed on the inner wall of the back cover, and the pointer, movement, substrate, and the like are disposed on the front side of the dial. Therefore, the distance (focal length) to the viewer is longer than before, and good visibility is obtained. In addition, since the components can be arranged efficiently, the vehicle display device can be thinned. In addition, since the dial illumination component (backlight) is separated from the substrate, the substrate can be reduced in size.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a case where the present invention is applied to a combination meter of a tachometer and a speedometer will be described. Note that the tachometer and the speedometer have different indices such as scales, but the other configurations are the same, so in this embodiment, the configuration of the tachometer part will be mainly described, and the same part as the configuration of the tachometer A description of the components of the speedometer will be omitted.

  1 is a front view of a vehicle display device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG.

  The vehicle display device 1 includes a backlight 5 that is a light source for illuminating a transparent display board, a transparent display board 6, a substrate 7, a stepper motor 8, and a storage space formed by the back cover 2 and the front cover 3. An indicator LED 10 that is an indicator illumination light source, an FPC (flexible printed circuit board) connector 11, an indicator illumination LED (light emitting diode) 12 that is an indicator light source, an external connector 13, and a housing 14 In addition, parts such as an indicator 15 and an LCD (Liquid Crystal Display) 16 are accommodated. A front glass 4 is attached to the opening 3 a formed in the front cover 3.

  As shown in the front view of FIG. 1, the transparent display board 6 is provided with an index 6A such as a scale for a tachometer on the left side and an index 6B such as a scale for a speedometer on the right side. In addition, an opening 6a which is a window for exposing the display screen of the LCD 16 is provided at the upper center. Only the tip of the pointer 9 indicating the indexes 6A and 6B is shown. On the display screen of the LCD 16, for example, average fuel consumption and travel distance display are displayed. The front cover 3 is provided with a plurality of indicators 15 (only one is shown in FIG. 1) for direction indication and warning display.

  As shown in the AA line cross-sectional view of FIG. 2, the tachometer portion has the backlight 5 disposed so as to be in close contact with the inner wall of the back cover 2 forming the storage space, and the transparent display board 6 is disposed on the upper surface thereof. Has been. The backlight 5 and the transparent display board 6 constitute a dial. A substrate 7 is fixed and stored by screwing or the like at the tip of a support portion 2b that is integrally formed from the inner wall of the back cover 2 and is erected. A stepper motor 8 serving as a movement, a plurality of indicator LEDs 10, and a plurality of FPC connectors 11 are mounted on the front side of the substrate 7, and a plurality of pointer illumination LEDs 12 and an external connector 13 are mounted on the back side. ing. Each of the plurality of indicator LEDs 10 is surrounded by a housing (partition wall) 14 that prevents light leakage to other indicators.

  The drive shaft 8a of the stepper motor 8 penetrates to the back side of the substrate 7 and protrudes toward the transparent display board 6, and a pointer 9 is attached to the tip thereof. The pointer 9 is arranged so as to rotate the grazing on the surface of the transparent display board 6. A front cover 3 is arranged in front of the front side of the substrate 7 so as to cover and cover parts such as the stepper motor 8 mounted on the front side of the substrate 7 and fixed so as to form a storage space together with the back cover 2. Has been. The front glass 4 is attached to the opening 3a formed in the upper part of the front cover 3 so that the indicators 6A and 6B of the transparent display board 6 and the display screen of the LCD 16 can be viewed from the front (viewer side). .

  As shown in FIG. 4, the backlight 5 includes an LED 5b and a prism 5c built in a housing 5a, and a diffusing plate 5d is arranged in the light emission direction of the prism 5c. The backlight 5 emits light from the LED 5b fed through the FPC 5e connected to the FPC connector 11 and is incident on the end face of the prism 5c so that the backlight 5 emits surface light from the diffusion plate 5d through the prism 5c. Thus, the transparent display board 6 is illuminated. The transparent display board 6 is a transparent flat plate made of a translucent material such as acrylic resin, and an index 6A is provided on one side by white printing.

  The external connector 13 is exposed to the outside through an opening 2a formed in the back cover 2 so that an external connector can be connected.

  As shown in the sectional view taken along the line B-B in FIG. 3, the LCD 16 is disposed so as to be in close contact with the inner wall of the back cover 2, and its display screen can be viewed through the opening 6 a of the transparent display plate 6. . The LCD 16 is an LCD with a thin backlight and is provided with an FPC 16a. The FPC 16a is connected to the FPC connector 11 mounted on the substrate 7 and is supplied with power. Thus, since the LCD 16 has a thin structure, it can be arranged in a relatively large size at the center position of the back cover 2 (transparent display board 6).

  FIG. 5 is a diagram illustrating the assembly of each part. As shown in FIG. 5A, the backlight 5 and the LCD 16 are fixed so as to be in close contact with the inner wall by engaging claws 2b and 2c formed integrally with the back cover 2. Next, as shown in FIG. 5B, the transparent display board 6 is fixed on the backlight 5 and the LCD 16. The method of fixing the transparent display panel 6 may be the same as the method of fixing the backlight 5 and the LCD 16 described above, or may be adhesive fixing to the backlight 5 and the LCD 16. Next, as shown in FIG. 5C, the substrate 7 is fixed to the support portion erected on the back cover 2.

  Prior to fixing the substrate 7, the pointer 9 is attached to the drive shaft 8 a of the stepper motor 8 mounted on the substrate 7, and the substrate 9 is placed on the lower side (transparent display plate 6 side). 7 is fixed to the back cover 2. The pointer 9 is passed by the surface of the transparent display panel 6 and is driven to rotate by the stepper motor 8. As described above, since the pointer 9 is arranged at the surface of the transparent display board 56, even if the viewpoint on the viewer side is deviated, it is possible to reduce the instruction difference indicating the index. The pointer 9 emits light emitted from the pointer illumination LED 12 mounted on the back side of the substrate 7 to the front side (front glass 4 side). After the substrate 7 is fixed, the FPCs 5e and 16a are respectively inserted into the FPC connectors 11 mounted on the substrate 7.

  FIG. 6 is a system configuration diagram. As shown in FIG. 6, a control circuit 17 such as a CPU is mounted on the substrate 7. A stepper motor 8, an indicator LED 10, an FPC connector 11, a pointer illumination LED 12, and an external connector 13 mounted on the substrate 7 are connected to the control circuit 17 by printed wiring. FPCs 5e and 16a for supplying power to the backlight 5 and the LCD 16 are connected to the FPC connector 11, respectively. The backlight 5 and the LCD 16 are controlled by the control circuit 17.

  As described above, according to the present invention, the backlight 5 is disposed on the back cover 2 so as to be in close contact with the inner wall surface, the transparent display board 6 is disposed on the backlight 5, and the stepper motor 8 serving as a movement. Since the transparent display board 6 is located at the back of the vehicular display device 1 by arranging the substrate 7 mounted in an inverted manner on the front side of the transparent display board 6, the distance (focal length) from the viewer is reduced. It is farther than before and good visibility is obtained. In addition, since the components can be arranged efficiently, the vehicle display device can be thinned. Further, the arrangement of the display element (LCD 16) which is a separate part is advantageous in terms of space. Further, by separating the light source for dial illumination (backlight 5 in this embodiment) from the substrate 7, the substrate 7 can be reduced in size. In addition, the dial 7 light source (backlight 5), the pointer illumination light source (LED 12 for pointer illumination), and the display element (LCD 16) different from the dial plate are supplied with power from the substrate 7, so it is necessary to supply power separately. There is no. Moreover, since the housing (partition wall) 14 for the indicator 15 is provided on the front side of the substrate 7, it contributes to a reduction in thickness by effectively using the space. Further, since no partition wall is required on the dial side, the dial light source may be illuminated with a backlight or the like, which contributes to further thinning.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various deformation | transformation and application are possible.

  For example, in the above-described embodiment, the dial is separated into the backlight 5 and the transparent display board 6, but instead of this, as an integrated self-luminous dial with built-in lighting parts such as EL. Also good.

  In the above-described embodiment, the LCD 16 with a thin backlight is disposed as a display at the center of the vehicle display device. Instead, a TFT type LCD, a self-luminous organic EL display, or the like is provided. May be arranged.

  In the above-described embodiment, the light shielding housing (partition wall) 14 of the indicator LED 10 is provided on the front side of the substrate 7, but instead of this, it is integrally formed on the front cover 3. May be.

It is a front view of the display apparatus for vehicles concerning an embodiment of the invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a schematic sectional drawing which shows the structure of the backlight in FIG. (A)-(C) are the figures explaining the assembly | attachment method of each part in the display apparatus for vehicles. It is a system block diagram of the display apparatus for vehicles. The structural example of the conventional display apparatus for vehicles is shown, (A) is a front view, (B) is the XX sectional view taken on the line in (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus for vehicles 2 Back cover 3 Front cover 3a Opening part 4 Front glass 5 Backlight (a part of dial)
6 Transparent display board (part of dial)
6A Index 7 Substrate 8 Stepper motor (movement)
8a Drive shaft 9 Pointer 12 Pointer illumination LED (Light source for pointer illumination)

Claims (3)

The dial, pointer, movement and substrate are stored in the storage space formed by the back cover and front cover, and the front glass is attached to the opening formed in the front cover so that the dial can be seen from the front. A vehicle display device,
The dial is disposed on the inner wall of the back cover,
The substrate is disposed in front of the dial,
The movement is mounted on the front side of the substrate,
The display device for vehicles, wherein the drive shaft of the movement penetrates the back side of the substrate and protrudes toward the dial plate, and the pointer is attached to the tip thereof. The vehicle display device according to claim 1,
The dial is composed of a backlight disposed in close contact with an inner wall of the back cover, and a transparent display plate disposed on the backlight and provided with an index. Vehicle display device. The vehicle display device according to claim 1 or 2,
On the back side of the substrate, a light source for pointer illumination for shining the pointer is arranged,
The display device for a vehicle, wherein the backlight is supplied with power from the substrate.

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