Display device for vehicle

Abstract

The utility model provides a display device for a vehicle. The display device can restrain noise from being transmitted through an elastic component. A vehicle display device is provided with: a display having a display surface on which information is displayed; a housing that accommodates the display and has an opening; a protective panel member that is formed in a translucent plate shape that blocks the opening of the housing, and that adheres the display surface to the rear surface of the housing on the housing space side; a circuit board located on the rear surface side of the display and having a ground pattern; and an elastic member which is made of a conductive material, is mounted on the surface of the circuit board facing the display, and presses the display. The circuit board has a mounting pattern, which is a region where the elastic member is mounted, and which is formed on the surface at a position away from the ground pattern as a conductive pattern different from the ground pattern.

Description

Technical Field

[0001] This utility model relates to a display device for vehicles. Background Technology

[0002] Patent Document 1 describes a vehicle display device comprising: a circuit board on which a light source and a grounding terminal are mounted; a display panel located on the surface side of the circuit board, through which light is partially transmitted; and a display element located between the circuit board and the display panel for displaying an image. The grounding terminal mounted on the circuit board is composed of a Z-shaped metal elastic member, which releases static electricity carried by the display panel to the grounding pattern of the circuit board, thereby suppressing the application of static electricity to the display element.

[0003] Citation List

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6837103 Utility Model Content

[0006] Technical issues

[0007] In the structure described in the aforementioned Patent Document 1, noise may propagate between the display element and the circuit board via the grounding terminal.

[0008] This invention was made in view of the above-mentioned actual situation, and its purpose is to provide a vehicle display device that can suppress the transmission of noise through elastic components.

[0009] Technical means

[0010] To achieve the above objectives, the vehicle display device of this utility model comprises:

[0011] A monitor, which has a display surface for displaying information;

[0012] A housing that houses the display and has an opening;

[0013] A protective panel component is formed as a light-transmitting plate that blocks the opening of the housing, and the display surface is bonded to the back side of the housing on the storage space side;

[0014] A circuit board, located on the rear side of the display, and having a grounding pattern; and

[0015] An elastic component, made of conductive material, is mounted on the surface of the circuit board opposite the display and presses against the display.

[0016] The circuit board has a mounting pattern for the area where the elastic member is mounted, and a conductive pattern, different from the grounding pattern, is formed on the surface at a position away from the grounding pattern.

[0017] Effects of the utility model

[0018] According to this invention, noise can be suppressed from propagating through elastic components. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of a vehicle display device according to one embodiment of the present invention.

[0020] Figure 2 This is a schematic plan view of a circuit board according to one embodiment of the present invention.

[0021] Figure 3 This is a schematic plan view showing an enlarged view of the periphery of the mounting pattern of the circuit board according to one embodiment of the present invention.

[0022] Figure 4 This is a schematic cross-sectional view of the periphery of the mounting pattern of the circuit board according to one embodiment of the present invention.

[0023] Figure 5 This is a schematic plan view with an enlarged view of the periphery of the mounting pattern of the circuit board of a modified embodiment of this utility model.

[0024] Symbol Explanation

[0025] 10: Vehicle display device; 20: Circuit board; 20F: Surface; 20B: Back side; 21: Grounding pattern; 21c, 25c: Connecting discs; 22, 25: Mounting patterns; 23: Wiring pattern; 25a: Main body; 25b: Current path; 27: Mounting element; 30: Housing; 31: Opening; 40: Protective panel component; 50: Display; 51: Display panel; 51a: Display surface; 52: Backlight unit; 60: Adhesive layer; 70: Elastic component; 80: Insertion element; 81: Component insertion space; A: Image; C: Gap; F: Surface side; B: Back side; Sp: Storage space; Sq: Rectangle. Detailed Implementation

[0026] A vehicle display device according to one embodiment of the present invention will be described with reference to the accompanying drawings. This vehicle display device is mounted on a vehicle, such as a motorcycle or other straddle-type vehicle.

[0027] like Figure 1As shown, the vehicle display device 10 includes a circuit board 20, a housing 30, a protective panel component 40, a display 50 that displays an image A including vehicle information such as vehicle speed, an adhesive layer 60, and multiple elastic components 70.

[0028] In the following description, based on the viewpoint of the observer in image A, the left-right direction is defined as the X direction, the up-down direction as the Y direction, and the front-back direction as the Z direction. The observer's near-front side in the Z direction is defined as the surface side F, and the depth side is defined as the back side B.

[0029] The housing 30 is formed of light-shielding resin or metal, and houses the circuit board 20, display 50 and elastic component 70 in the storage space Sp. The housing 30 is box-shaped with an opening facing the surface side F.

[0030] The protective panel component 40 is formed into a plate shape from a light-transmitting resin or glass and is configured to block the opening 31 of the housing 30.

[0031] The display 50 includes a display panel 51 and a backlight unit 52.

[0032] The display panel 51 is a TFT (Thin Film Transistor) type liquid crystal display panel. Under the control of the control elements (not shown) on the circuit board 20, the display panel 51 displays image A on the display surface 51a on the surface side F. The display surface 51a is a rectangle that is longer in the X direction. The display surface 51a of the display panel 51 is fixed to the back of the protective panel component 40 by optical bonding (adhesive layer 60).

[0033] The backlight unit 52 is located on the back side B of the display panel 51 and illuminates the display panel 51 under the control of the control elements (not shown) on the circuit board 20. The backlight unit 52 has a plurality of LEDs (light emitting diodes) arranged in a matrix on the XY plane as light sources.

[0034] In addition, in this example, the display panel 51 and the backlight unit 52 of the display 50 are integrated, but the display 50 may also be composed of only the display panel 51, with multiple LEDs for illuminating the display panel 51 disposed on the surface 20F of the circuit board 20.

[0035] The adhesive layer 60 is located between the display surface 51a and the back of the protective panel component 40, fixing the display surface 51a of the display panel 51 to the back of the protective panel component 40. The adhesive layer 60 is an optically clear adhesive (OCA).

[0036] The circuit board 20 has a surface 20F and a back surface 20B as mounting surfaces on both its front and back sides. Multiple mounting elements 27 and elastic members 70 are mounted on the surface 20F, and multiple mounting elements 27 are mounted on the back surface 20B. The multiple mounting elements 27 include a CPU (Central Processing Unit), a GDC (Graphics Display Controller), memory, connectors, discrete components, etc. The CPU and GDC are control elements.

[0037] like Figure 2 As shown, a grounding pattern 21, a mounting pattern 22, and a wiring pattern 23 are formed on the surface 20F of the circuit board 20 as copper foil patterns. The height (length in the Z direction) of the mounting element 27 mounted on the back side 20B is greater than the height of the mounting element 27 mounted on the surface 20F.

[0038] The inner layers (not shown) of the back surface 20B and the circuit board 20 are also formed with grounding patterns and wiring patterns, etc., which are not shown, in the same way as the surface 20F.

[0039] Grounding pattern 21 is a full-surface ground covering the outer periphery of wiring pattern 23 and mounting pattern 22. Grounding pattern 21 is formed to reduce the influence of external noise and suppress the release of noise to the outside.

[0040] Wiring pattern 23 is the current path through which electrical signals are transmitted and received between mounting components 27.

[0041] Each mounting pattern 22 is disposed on the corner of a virtual rectangle Sq that is approximately similar to the circuit board 20 on the surface 20F of the circuit board 20.

[0042] like Figure 3 and Figure 4 As shown, each mounting pattern 22 is a mating pad or solder pad for mounting the elastic member 70. The mounting pattern 22 is rectangular in top view, and in this example, it is a rectangle longer in the Y direction. Furthermore, in Figure 3 The illustration of the elastic component 70 is omitted in the text.

[0043] A gap C is formed between the outer shape of the mounting pattern 22 and the grounding pattern 21 surrounding the outer periphery of the mounting pattern 22. The gap C is formed over the entire outer periphery of the mounting pattern 22. The mounting pattern 22 and the grounding pattern 21 are insulated from each other through the gap C.

[0044] like Figure 1As shown, multiple elastic members 70 support the display 50 from the rear side and are mounted on mounting patterns 22 on the surface 20F of the circuit board 20. Each elastic member 70 is formed of a metal material as a conductive material and is a leaf spring that elastically deforms in the Z direction. Each elastic member 70 is compressed in the Z direction at a position between the rear side of the display 50 and the surface 20F of the circuit board 20, thus pressing against the rear side of the display 50.

[0045] Each elastic component 70 is, for example, an onboard contactor (registered trademark). The elastic component 70 can be any type of known onboard contactor (registered trademark). For example, as an example of an elastic component 70, there are types that exhibit Z-shaped overall elastic deformation, or types where a leaf spring portion supports the back of the press display 50 via a base mounted on the mounting pattern 22. Besides onboard contactors (registered trademark), the elastic component 70 can also be a grounding foam pad. This grounding foam pad is an electromagnetic wave shielding material; its outer skin is formed of conductive fibers or metal foil, and its interior is filled with polyurethane sponge material, enabling it to simultaneously provide electromagnetic wave shielding and grounding (grounding) effects.

[0046] Furthermore, the elastic member 70 is not limited to supporting the back of the display 50, but can also be a structure that supports the back of the display panel 51.

[0047] (Effect)

[0048] According to one implementation method described above, the following effects are achieved.

[0049] The vehicle display device 10 includes: a display 50 having a display surface 51a for displaying information; a housing 30 housing the display 50 and having an opening 31; a protective panel member 40 formed as a light-transmitting plate that blocks the opening 31 of the housing 30, and the display surface 51a is adhered to the back side of the housing 30 on the storage space Sp side (the back side B side of the protective panel member 40); a circuit board 20 located on the back side of the display 50 and having a grounding pattern 21; and an elastic member 70 made of conductive material, mounted on the surface 20F of the circuit board 20 opposite to the display 50, and pressing the display 50. The circuit board 20 has a mounting pattern 22, which is the area for mounting the elastic member 70, and is formed on the surface 20F as a conductive pattern different from the grounding pattern 21 at a position away from the grounding pattern 21.

[0050] As a comparative example, in a structure where the elastic component is located on the grounding pattern of the circuit board, noise may propagate between the circuit board and the display via the elastic component.

[0051] Regarding this, according to the above structure, the grounding pattern 21 and the mounting pattern 22 of the mounting elastic member 70 can be electrically separated, thereby suppressing noise propagation between the circuit board 20 and the display 50 via the elastic member 70. Therefore, noise immunity performance can be improved. Specifically, it is possible to suppress the propagation of noise from the display 50 to the circuit board 20 via the elastic member 70, and the propagation of noise from the circuit board 20 to the display 50 via the elastic member 70, thereby improving interference immunity.

[0052] Furthermore, this utility model is not limited to the above embodiments and drawings. Appropriate modifications (including the deletion of constituent elements) can be made without altering the spirit of this utility model. Hereinafter, an example of a modification will be described.

[0053] (Modified Example)

[0054] In the above embodiment, the mounting pattern 22 and the grounding pattern 21 are insulated from each other by a gap C. However, as... Figure 5 As shown, a component insertion space 81 may also be formed on the surface 20F of the circuit board 20. This component insertion space 81 is provided with an insertion element 80 that can electrically connect the mounting pattern 25 and the grounding pattern 21. The insertion element 80 may be, for example, a noise countermeasure element such as a bridging resistor or a capacitor.

[0055] The mounting pattern 25 includes a rectangular main body 25a and a current path 25b extending from the main body 25a. The current path 25b has a width shorter than the length of each side of the main body 25a and extends in a direction away from the main body 25a. In this example, the current path 25b is formed to extend from the corner of the main body 25a in the X direction. A bonding pad 25c is formed at the front end of the current path 25b away from the main body 25a, which can be connected to one end of the insertion element 80. The other end of the insertion element 80 can be connected to the bonding pad 21c located in the grounding pattern 21. The bonding pad 21c is located in the grounding pattern 21 opposite to the bonding pad 25c across a gap C. The component insertion space 81 is located between the bonding pads 21c and 25c. Furthermore, at least one of the bonding pads 21c and 25c can also be a solder pad.

[0056] according to Figure 5 The variation shown achieves the following effect.

[0057] The installation pattern 25 is surrounded by the grounding pattern 21 with a gap C between them.

[0058] The circuit board 20 has a component insertion space 81, which can accommodate an insertion element 80 electrically connected between the mounting pattern 25 and the grounding pattern 21.

[0059] According to this structure, by pre-preparing the component insertion space 81, the presence or absence of an electrical connection between the display 50 and the circuit board 20 can be easily selected, thereby improving the versatility of the circuit board 20.

[0060] In the above embodiment, the entire outer periphery of the mounting patterns 22 and 25 is surrounded by the grounding pattern 21 with a gap C, but it is also possible that only a portion of the outer periphery of the mounting patterns 22 and 25 is surrounded by the grounding pattern 21 with a gap C.

[0061] Furthermore, in the above embodiments, the display 50 is not limited to a TFT liquid crystal display panel, but may also be an organic EL display device.

[0062] In addition, in the above embodiments, the vehicle display device 10 can also be combined with a pointer indicator.

[0063] In addition, in the above embodiment, the adhesive layer 60 can be omitted.

[0064] Alternatively, in the above embodiment, the protective panel component 40 may also be located as part of the display 50 on the outermost surface F of the display 50.

[0065] In addition, in the above embodiments, the vehicle display device 10 may also be mounted on an object other than a vehicle, that is, it may simply be a display device.

Claims

1. A display device for a vehicle, characterized by comprising: Possessing: a display having a display surface that displays information; a housing that houses the display and has an opening portion; a protective panel member formed as a plate having light transmissivity that plugs the opening portion of the housing and has the display surface adhered to the back surface on the side of the housing's receiving space; a circuit board located on the back surface side of the display and having a ground pattern; and an elastic member composed of an electrically conductive material, mounted to the surface of the circuit board opposite the display, and pressing the display, the circuit board having a mounting pattern, which is a region where the elastic member is mounted, formed on the surface as an electrically conductive pattern different from the ground pattern at a position away from the ground pattern.

2. The display device for a vehicle according to claim 1, characterized in that the mounting pattern is surrounded by the ground pattern with a gap, the circuit board has an element insertion space that can provide an insertion element electrically connected between the mounting pattern and the ground pattern.

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