Display device for vehicle

Abstract

To provide a display device for vehicles which improves electromagnetic compatibility.SOLUTION: A display device for vehicles comprises: a TFT liquid crystal display 100 as an example of a first display including a first display panel 110 forming a first display screen 111 and a shield 130 covering an edge of the first display panel 110 while exposing the first display screen 111; a segment liquid crystal display 200 as an example of a second display including a second display panel 210 forming a second display screen 211 and a connector 220 formed in one end of an edge of the second display panel 210; a control section for controlling display of the TFT liquid crystal display 100 and the segment liquid crystal display 200; and a conductive member electrically connecting the other end 214 in the edge of the second display panel 210 at an opposite side of the connector 220 with the second display screen 211 interposed therebetween with the shield.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a display device for a vehicle. [Background technology]

[0002] Conventionally, a configuration such as that shown in Patent Document 1 has been disclosed. The circuit board (ground structure) disclosed in this document includes a noise ground layer (140) that transmits noise generated by a noise source (200), and a circuit ground layer (100) for a power supply supplied to electronic components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-111642 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, even with this configuration, there is still room for improvement in terms of resistance to external noise (immunity, electromagnetic susceptibility, EMS) and noise emission (electromagnetic interference, EMI). In particular, high electromagnetic compatibility (EMC) is required around connectors that connect high-speed signal lines used for transmitting and receiving video and other signals.

[0005] SUMMARY OF THE PRESENT EMBODIMENT In view of the above, an object of the present invention is to provide a vehicle display device having improved electromagnetic compatibility. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a display device for a vehicle, comprising: a first display having a first display panel forming a first display surface and a shield covering an edge of the first display panel while exposing the first display surface; a second display having a second display panel forming a second display surface and a connector formed at one end of an edge of the second display panel; A control unit that controls display of the first display and the second display; The second display panel further includes an electrically conductive member that electrically connects the shield to another end portion of the second display panel, the other end portion being opposite the connector across the second display surface. [Brief description of the drawings]

[0007] [Figure 1] 1 is a diagram showing an external appearance of a meter 1 according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a diagram showing the appearance of the meter 1 with the visor 20 removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, examples of an embodiment and a modified example of a vehicle display device according to the present disclosure that are mounted on a vehicle will be described in the following order with reference to the drawings. [First embodiment] [Example of effect] [Variations]

[0009] [First embodiment] <1-1. Description of the configuration> 1 is a diagram showing an example of the appearance of a vehicle display device according to the present disclosure. As a preferred application form, the vehicle display device according to the present disclosure is configured as a meter 1 mounted on a vehicle as shown in FIG.

[0010] A vehicle is a vehicle such as an automobile or motorcycle, and is equipped with, for example, a power source and a power transmission system to move a user (a passenger or user) or loaded cargo. The user inputs operation information as an electrical signal to the vehicle's control means (such as a microcomputer) by operating an operation unit (such as a switch or touch panel). The control means controls and operates the electrical components mounted on the vehicle based on the input operation information.

[0011] The meter 1 includes a visor 20, which is one of the exterior components. The visor 20 is a light-shielding member that is made of synthetic resin painted in a dark color and forms an opening that exposes the display surface so that it can be viewed. The meter 1 displays information about the vehicle in which the meter 1 is mounted, using a first display surface 111 and a second display surface 211 that are provided so as to be visible through an opening in the visor 20. The information about the vehicle includes vehicle operation information related to navigation, vehicle driving information related to the driving of the vehicle such as speed and engine output, driving environment information related to other vehicles and roads, and vehicle body information related to the maintenance status of the vehicle equipment.

[0012] FIG. 2 shows the appearance of the meter 1 with the visor 20 removed. The meter 1 includes a TFT liquid crystal display 100, a segment liquid crystal display 200, a circuit board 10, a lower case 21, and a conductive tape 30.

[0013] The TFT liquid crystal display 100 is a module that is composed of an electronic display that performs various displays in response to input electrical signals and its peripheral circuits (such as a backlight and a driver). The TFT liquid crystal display 100 has a first display panel 110, a connector 120, and a shield 130.

[0014] The first display panel 110 is an electronic display panel that forms the first display surface 111, and is composed of a TFT (Thin Film Transistor) liquid crystal, an organic EL (Electro-Luminescence), or the like. In this disclosure, an example is shown in which a liquid crystal module using a TFT and an LED light source is applied. The first display panel 110 performs various displays on the first display surface 111 in response to an electrical signal input from the connector 120.

[0015] The connector 120 is connected to the circuit board 10 and transmits electrical signals representing an image generated by a control unit (to be described later) or an image generating unit outside the meter 1 .

[0016] The shield 130 is made of a material capable of blocking electromagnetic waves, such as an aluminum alloy. It is a shielding member that covers the periphery (edge) of the first display panel 110 while leaving the first display surface 111 exposed. The shield 130 is electrically connected to the circuit board 10 and the ground wiring of the vehicle in order to suitably block electromagnetic waves.

[0017] The segment liquid crystal display 200 is composed of an electronic display that performs various displays in response to an input electrical signal and its peripheral circuits (such as a backlight and a driver). The segment liquid crystal display 200 is arranged side by side with the TFT liquid crystal display 100 in the left-right direction. The segment liquid crystal display 200 includes a second display panel 210, a connector 220, and a light source.

[0018] The second display panel 210 is configured, for example, with a so-called segment liquid crystal panel. That is, the second display panel 210 displays symbols such as warning lights, numbers in seven-segment display, and scales on a bar graph by controlling the on / off of liquid crystal for each segment whose shape does not change. Depending on whether the liquid crystal for each segment is on or off, the transmission or non-transmission of illumination light emitted from a light source is switched. The second display panel 210 forms a plurality of segments inside the second display surface 211.

[0019] The outer shape (end portion) of the second display panel 210 is a rectangle that is long in the vertical direction of the drawing, with one short side being end portion 213 (one end portion) and the other short side being the other end portion 214 (the other end portion). A connector 220 is formed at end portion 213. Connector 220 is connected to circuit board 10, and transmits an electric signal that represents an image generated by a control portion (to be described later) or an image generating portion outside meter 1.

[0020] The circuit board 10 is a printed circuit board in which conductor wiring is applied to a base material made of an insulating material and various electric and electronic elements are mounted. The circuit board 10 can be configured, for example, as a printed circuit board in which a copper foil pattern is printed on a glass epoxy base material.

[0021] The circuit board 10 is electrically connected to the vehicle's electrical components via a controller area network (CAN) or the like. The circuit board 10 is also electrically connected to a TFT liquid crystal display 100 and a segment liquid crystal display 200. The circuit board 10 controls the display and lighting of the TFT liquid crystal display 100 and the segment liquid crystal display 200 in response to electrical signals input from the electrical components.

[0022] The lower case 21 is an exterior part made of synthetic resin and holds the above-mentioned components. The lower case 21 fits with the visor 20 to form a closed space with a certain degree of sealing ability to prevent dust from entering from the outside of the meter 1, and holds the above-mentioned components inside this closed space.

[0023] <1-2. About the conductive tape 30> The conductive tape 30 is composed of an adhesive surface and a base material, and is configured as an example of a conductive member. The conductive tape 30 electrically connects the attached members to each other. In this embodiment, the conductive tape 30 electrically connects the shield 130 and the other end 214. Specifically, the conductive tape 30 is attached to the shield 130 near a corner close to the other end 214, and is attached to the second display panel 210 so as to completely cover one short side (the other end 214) of the four sides of the rectangular shape.

[0024] The conductive tape 30 electrically connects the other end 214 and the shield 130, thereby improving the EMC of the meter 1. Specifically, the other end 214 is located opposite the connector 220 within the second display panel 210. In other words, the other end 214 is located on the outer periphery of the second display panel 210, opposite the connector 220 with the second display surface 211 in between.

[0025] The connector 220 transmits image data to be displayed on the second display panel 210 as an electrical signal. It is therefore desirable for the connector 220 to be configured so as to be less susceptible to the effects of noise. In this regard, in this configuration, the conductive tape 30 attached to the other end 214 suitably releases various noises applied to the segment liquid crystal display 200 from the other end 214, which is distant from the connector 220. This makes it difficult for noise to affect the electrical signals flowing through the connector 220, thereby reducing the occurrence of disturbances in the display of the segment liquid crystal display 200.

[0026] [Example of effect] First, the meter 1, which is an example of a vehicle display device according to the present disclosure, A TFT liquid crystal display 100 as an example of a first display having a first display panel 110 forming a first display surface 111 and a shield 130 covering the edge of the first display panel 110 while exposing the first display surface 111; A segment liquid crystal display 200, which is an example of a second display, has a second display panel 210 forming a second display surface 211 and a connector 220 formed at one end of the edge of the second display panel 210; A control unit that controls the display of the TFT liquid crystal display 100 and the segment liquid crystal display 200; The second display panel 210 further includes a conductive tape 30 that electrically connects the shield 130 to another end 214 of the edge of the second display panel 210, the other end 214 being opposite the connector 220 across the second display surface 211.

[0027] This configuration improves the EMC of the vehicle display device, and is particularly suitable for use in vehicles, since vehicles have many noise sources such as motors, engines, transformer elements, and microcomputers. The inventors also tested the following patterns for the locations where the conductive tape was attached. However, they found that the above configuration improved EMC more than the configuration shown in the following patterns. Pattern A: A conductive tape is attached so as to cover the entire edge of the second display panel 210, and the conductive tape is also connected to the shield 130. Pattern B: A configuration in which the conductive tape is attached so as to entirely cover both the end portion 213 of the second display panel 210 and the connector 220, and the conductive tape is not connected to the shield . Pattern C: A configuration in which the conductive tape is attached so as to cover the entire end portion 213 of the second display panel 210, and the conductive tape is not connected to the shield 130. In both patterns, the configuration is such that the electrical signal is easily affected by noise transmission near connector 220, which is thought to be the reason for the difference in EMC.

[0028] Second, the meter 1 of the present disclosure has The second display surface 211 has a rectangular shape. The end portion 213 is one of the short sides of the rectangular shape. The other end 214 is the other short side of the rectangular shape.

[0029] This configuration improves the EMC of the vehicle display device.

[0030] Second, the meter 1 of the present disclosure has The conductive tape 30 is formed so as to cover the other end 214 entirely.

[0031] This configuration improves the EMC of the vehicle display device.

[0032] [Variations] Although the vehicle display device of the present disclosure has been exemplified in the manner described above, it may be configured in other manners. For example, although the conductive tape 30 is applied, other conductive members may be applied. For example, the conductive member may be made of conductive ink, a conductive dial, a conductive resin, or the like. [Explanation of symbols]

[0033] 1. Meter (an example of a vehicle display device) 100 TFT LCD display (example of the first display) 110 First display panel 111 First display surface 120 Connector 130 Shield 200 segment LCD display (an example of a secondary display) 210 Second display panel 211 Second display screen 213 End 214 Other end 220 Connector 10 Circuit Board 20 Visor 21 Lower case 30 Conductive Tape

Claims

1. a first display having a first display panel forming a first display surface and a shield covering an edge of the first display panel while exposing the first display surface; a second display having a second display panel forming a second display surface and a connector formed at one end of an edge of the second display panel; A control unit that controls display of the first display and the second display; a conductive member electrically connecting the shield to another end of the edge of the second display panel, the other end being on the opposite side to the connector across the second display surface. Vehicle display device.

2. The second display surface has a rectangular shape, The end portion is one of the short sides of the rectangular shape, The other end is the other short side of the rectangular shape. The display device for a vehicle according to claim 1 .

3. The conductive member is formed to cover the entire end portion. The display device for a vehicle according to claim 1 or 2.

Images