Display device for vehicle

Abstract

A vehicle display device (1) is provided with a display device (10) that emits display light (L2) toward a display surface (410) of a vehicle (400). The display device (10) has a display unit (100), a circuit board (212) that is formed of a conductive metal material and on which a light source is mounted, and a backlight housing (300) that houses the light source and the display unit (100). Furthermore, the circuit board (212) includes a main body portion (212a) to which a light source is mounted and which is connected to ground (GND), and an extension portion (212b) extending from the main body portion (212a) toward the display portion (100), and in a state in which the circuit board (212) is attached to the backlight housing (300), the main body portion (212a) is disposed so as to be exposed from the backlight housing (300), the extension portion (212b) is disposed so as to be in contact with the display portion (100), and the extension portion (212b) is disposed so as to be in contact with the display portion (100). As a result, the display unit (100) is connected to the ground (GND) via the extension unit (212b) and the main body unit (212a).

Description

Technical Field

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

[0002] For example, Patent Document 1 discloses a vehicle display device including a display unit (display), a plurality of light sources for illuminating the display, and a circuit board on which the plurality of light sources are mounted. In addition, Patent Document 2 discloses a vehicle display device capable of efficiently dissipating heat generated by the light sources.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2011-165624

[0006] Patent Document 2: Japanese Patent Application Publication No. 2011-90976 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, the vehicle display devices described in Patent Documents 1 and 2 have room for further improvement in terms of so-called noise countermeasures in addition to heat dissipation measures for efficiently dissipating heat generated by the light source.

[0009] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle display device capable of appropriately achieving noise countermeasures.

[0010] Means for solving problems

[0011] In order to achieve the above-mentioned purpose, the vehicle display device involved in the present invention is characterized in that it has a display device, which is mounted on a vehicle and emits an image that is visually recognized as a virtual image by a passenger of the vehicle as display light toward a display surface arranged on the vehicle. The display device has: a metal circuit substrate, which is formed of a conductive plate-shaped metal material and is equipped with a light source; a display unit, which is arranged opposite to the light source and emits the display light; and a backlight housing, which accommodates the light source and the display unit internally, and the metal circuit substrate is constructed to include: a main body, which is equipped with the light source and is connected to the ground; and an extended portion, which is extended from the main body toward the display unit, and when the metal circuit substrate is assembled in the backlight housing, the main body is exposed to the outside of the backlight housing, and the extended portion is arranged in contact with the display unit so that the display unit is connected to the ground via the extended portion and the main body.

[0012] Effects of the Invention

[0013] The vehicle display device of the present invention has the effect of being able to appropriately implement noise countermeasures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a diagram showing a schematic configuration of a vehicle display device according to an embodiment.

[0015] Figure 2 It is an exploded perspective view showing a schematic structure of a display device constituting the vehicle display apparatus of the embodiment.

[0016] Figure 3 It is a cross-sectional view showing a schematic structure of a display device constituting the vehicle display apparatus of the embodiment. DETAILED DESCRIPTION

[0017] Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings. In addition, the present invention is not limited to the embodiment. In addition, the constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art, or substantially the same elements.

[0018] [Example]

[0019] The vehicle display device 1 is applied to a vehicle 400 such as an automobile, and is a head-up display device mounted in an instrument panel (not shown) provided on a dashboard of the vehicle 400 .

[0020] like Figure 1 , Figure 2As shown, the vehicle display device 1 includes a display 2 and a control unit (not shown), and the display 2 includes a display device 10 that emits display light L2 toward a display surface 410 provided at the front of the vehicle 400. The display device 10 can display an image on the display screen 110 of the display unit 100 by irradiating the display unit 100 with the emitted light L1 from the LED chip 211 as a light source, and emit the image as the display light L2. In addition, the display 2 can make the image projected on the display surface 410 be visually recognized as a virtual image Vi that is seen overlapping with the scenery seen from the eye point EP by reflecting the display light L2 emitted by the display device 10 toward the display surface 410 toward the eye point (visual position) EP side. In addition, the eye point EP for the vehicle display device 1 is the position of the viewpoint of the driver 500, a passenger of the vehicle 400, and is presumed to be a spatial area. In addition, the display surface 410 for reflecting the display light L2 emitted by the display device 10 is composed of a windshield WS provided at the front of the vehicle 400. However, the form of the display surface 410 is not particularly limited, and for example, it may be a transparent or translucent panel (e.g., a synthesizer) provided on the driver 500 side of the windshield WS. In addition, in the vehicle display device 1, the connection method between the components for power supply, control signals, and transmission and reception of various information, etc., may be any of wired connection via wiring materials such as wires and optical fibers (e.g., including optical communication via optical fibers, etc.), wireless communication, and wireless connection such as contactless power supply, unless otherwise specified.

[0021] Furthermore, the vehicle display device 1 of the present embodiment realizes a structure capable of appropriately implementing noise countermeasures by making the metal circuit substrate (equivalent to the metal circuit substrate) 212 on which the LED chip 211 is mounted include a main body 212a on which the LED chip 211 is arranged and connected to the ground GND, and an extended portion 212b extended from the main body 212a and assembled in a state of contact with the display unit 100. Figure 1 to Figure 3 Each structure of the vehicle display device 1 will be described in detail.

[0022] also, Figure 1The width direction of the vehicle display device 1 shown is typically equivalent to the vehicle width direction of the vehicle 400 to which the vehicle display device 1 is applied (hereinafter referred to as the vehicle width direction Y). In addition, the depth direction of the vehicle display device 1 is typically equivalent to the front-back direction of the vehicle 400 to which the vehicle display device 1 is applied (in other words, the traveling direction of the vehicle 400, hereinafter referred to as the vehicle front-back direction X). In addition, the front side of the vehicle display device 1 is the side facing the driver's seat of the vehicle 400, and is typically equivalent to the side visually recognized by the driver 500 sitting in the driver's seat. On the other hand, the back side of the vehicle display device 1 is the side opposite to the front surface side in the depth direction, and is typically equivalent to the side accommodated inside the instrument panel. In addition, in the following description, in the vehicle front-back direction X, the side where the vehicle 400 moves forward is sometimes referred to as the "front", and the side where the vehicle 400 moves backward is sometimes referred to as the "rear". In addition, in the height direction of the vehicle 400 (hereinafter referred to as the vehicle height direction Z), the upper side in the vertical direction is sometimes referred to as the "upper side", and the lower side in the vertical direction is sometimes referred to as the "lower side".

[0023] In the following description, in the display device 10, light emitted from the display screen 110 of the display unit 100 is referred to as display light L2. In addition, parallel light emitted from the field lens 230 of the backlight 200 is referred to as outgoing light L1, and the axis of the outgoing light L1 is referred to as an optical axis L1x. In addition, the extending direction of the optical axis L1x is referred to as an optical axis direction L1d.

[0024] In addition, Figure 2 , Figure 3 The depth direction of the display device 10 shown is referred to as the "device front-to-back direction D1", the width direction is referred to as the "device width direction D2", and the height direction is referred to as the "device height direction D3". The device front-to-back direction D1, the device width direction D2, and the device height direction D3 are orthogonal to each other. In addition, the device front-to-back direction D1 is typically a direction along the optical axis direction L1d, and when the device is set to the vehicle 400, it is parallel to the optical axis L1d. Figure 1 The vehicle front-rear direction X shown in FIG. 1 is obliquely intersecting with the vehicle front-rear direction X. In addition, the device width direction D2 is typically along Figure 1 In the following description, in the device front-rear direction D1 of the display device 10 , the side where the display unit 100 is located is sometimes referred to as the “front”, and the side where the backlight 200 is located is sometimes referred to as the “rear”.

[0025] In addition, for the sake of explanation, Figure 2 The display device 10 shown in the figure only shows the display portion 100 , the LED substrate 210 , and the backlight housing 300 .

[0026] In addition, each direction used in the following description is a direction in a state where each part of the vehicle display device 1 is assembled, or a direction in a state where each part of the display unit 10 is assembled, unless otherwise specified.

[0027] [monitor]

[0028] The display 2 is located between the windshield WS and the eye point EP in the vehicle front-rear direction X, and is a part that enables the driver 500 to recognize various information such as the status of the vehicle 400 by projecting a virtual image Vi onto the windshield WS. The display 2 is controlled by a control unit (not shown), and by causing the display screen 110 of the display unit 100 to display an image generated based on the information obtained by the control unit, the virtual image Vi can be displayed superimposed on the scenery seen from the eye point EP. Figure 1 As shown, the display 2 includes a display device 10 , a reflector 20 , and a main housing 30 .

[0029] The display device 10 is a part that emits the display light L2 toward the reflector 20. The display device 10 can display an image on the display screen 110 of the display unit 100 by irradiating the outgoing light L1 from the backlight 200 to the display unit 100 and emit it as the display light L2. The details of the display device 10 will be described later.

[0030] The reflector 20 is a part that reflects the display light L2 toward the windshield WS. Figure 1 As shown, the reflector 20 has a concave reflective surface and can magnify the image. In addition, the shape of the reflective surface can be, for example, a free-form surface, and can be set to a shape that can correct the distortion and aberration of the image.

[0031] The main housing 30 is made of a resin material or the like, and is formed into a box shape so as to accommodate the display device 10, the reflector 20, etc. in the interior (interior space 30S). Figure 1 As shown, the main housing 30 is formed of a wall portion 30K, and is configured to include an assembly opening portion 30 a to which the display device 10 can be assembled, and an opening portion 30 b to emit the display light L2 to the outside.

[0032] The assembly opening 30a is located on the rear side of the main housing 30, and is a portion that communicates the inside and outside of the main housing 30 by opening along the vehicle front-rear direction X. The display device 10 is assembled through the assembly opening 30a in a state where the rear side of the backlight housing 300 is exposed to the outside of the main housing 30. Therefore, the display device 10 is assembled to the main housing 30 in a manner that the display light L2 emitted from the display unit 100 is emitted toward the front side, and the periphery of the display unit 100 is covered by the wall portion 30K, so that the display light L2 is blocked.

[0033] On the other hand, the opening 30b is provided in the wall portion 30Kb located on the upper side of the main housing 30 (the side where the display surface 410 is located), and is a portion that makes the inside and outside of the main housing 30 communicate with each other by opening along the vehicle height direction Z. Therefore, when the display light L2 emitted from the display unit 100 is directed toward the opening 30b via the reflector 20 or the like, the main housing 30 can emit the display light L2 toward the outside. Therefore, when the display 2 is mounted in the instrument panel, it can emit the display light L2 toward the display surface 410 located on the upper side of the opening 30b. In addition, the opening 30b can also be closed by a transparent cover that allows the display light L2 to pass through.

[0034] [Display device]

[0035] Next, the display device 10 is described in detail. The display device 10 is a part that can operate as follows: by irradiating the display unit 100 with the emission light L1 from the LED chip 211 as a light source, an image is displayed on the display screen 110 of the display unit 100, and the image is emitted toward the front side as the display light L2. Figure 2 , Figure 3 As shown, the display device 10 includes a display portion 100 , a backlight 200 , and a backlight housing 300 .

[0036] The display unit 100 is a part that transmits the outgoing light L1 and emits the light as the display light L2. The display panel 110 of the display unit 100 is composed of a light-transmitting TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) or the like.

[0037] The backlight 200 is a unit including an LED substrate 210 , a condenser lens 220 , and a field lens 230 .

[0038] The LED substrate 210 is configured to include a plurality of LED chips 211 and a circuit substrate 212 on which each LED chip 211 can be mounted. The LED chip 211 is a light source composed of a light emitting diode, and is a component that emits light by supplying power from a power source (not shown) such as a secondary battery of the vehicle 400. In addition, the circuit substrate 212 is composed of a conductive plate-shaped metal material, such as an aluminum plate, and is a component that can fix the LED chip 211 in a predetermined area (a main body 212a described later). The circuit substrate 212 is formed by performing various processes such as punching, stamping, and bending on a metal plate, thereby forming each part in a three-dimensional integrated manner. The LED chips 211 are arranged in a lattice shape on the circuit substrate 212. When the circuit substrate 212 is assembled in the backlight housing 300, the LED chips 211 are arranged opposite to the display screen 110, thereby being able to emit light toward the display screen 110. In addition, the structure of the circuit substrate 212 will be described later.

[0039] The condenser lens 220 is a lens made of glass or transparent resin. The condenser lens 220 has an incident surface formed of a flat surface and an exit surface formed of a convex curved surface, and the incident surface is arranged opposite to the LED chip 211. Figure 3 As shown, a condenser lens 220 is provided for each LED chip 211 , thereby enabling light emitted from each LED chip 211 to be condensed.

[0040] The field lens 230 is a lens made of glass or transparent resin. The field lens 230 has an incident surface and an exit surface, and the incident surface is arranged opposite to the focusing lens 220. Figure 3 As shown, the field lens 230 is disposed between the condenser lens 220 and the display screen 110 , thereby being able to adjust the traveling direction of the incident light respectively incident from the condenser lens 220 to a predetermined direction. Therefore, the backlight 200 can emit parallel light toward the display screen 110 .

[0041] The backlight housing 300 is made of resin material and is assembled Figure 2 The LED substrate 210 shown in the figure can accommodate the display unit 100, LED chip 211, condenser lens 220, field lens 230 and other parts. Figure 2 , Figure 3 As shown, the backlight housing 300 is formed of a wall portion 300K, and is configured to include an assembly wall portion 300Ka to which the display unit 100 can be assembled, a pair of side wall portions 300Kb, and a bottom wall portion 300Kc.

[0042] The assembly wall 300Ka is a plate-shaped wall formed in a substantially rectangular shape. Figure 2 As shown, the assembly wall 300Ka is located in front of the backlight housing 300. In addition, the assembly wall 300Ka is opened along the device front-back direction D1 to form an opening 300a that connects the inside and outside of the backlight housing 300. The opening 300a is formed in a substantially rectangular shape. Therefore, when the display unit 100 is assembled, the assembly wall 300Ka is located at a position surrounding the edge of the display unit 100 when viewed from the device front-back direction D1. In addition, as shown in FIG. Figure 3 As shown, the display unit 100 is assembled in a state where the assembly wall 300Ka is in contact with the front surface of the display unit 100, and the image displayed on the display screen 110 is exposed through the opening 300a, so that the image can be emitted as the display light L2. Figure 3As shown, the assembly wall portion 300Ka of the present embodiment is located at a position inclined relative to the optical axis L1x of the emitted light L1. Therefore, when the backlight housing 300 is assembled to the main housing 30, the end portion of the assembly wall portion 300Ka located on the upper side is configured to protrude toward the front side more than the end portion located on the lower side. Therefore, when the display device 10 of the present embodiment causes the external light incident on the main housing 30 to be reflected on the display screen 110 of the display unit 100, the light can be directed as reflected light L3 toward the side opposite to the display surface 410 (the lower side). Furthermore, the display device 10 can change the path of the light so that the reflected light L3 does not return to the eyes of the driver 500 by following the incident path of the external light.

[0043] In addition, the side wall portion 300Kb is formed into a substantially trapezoidal shape and is a plate-like wall portion with the device width direction D2 being the plate thickness direction. Figure 2 As shown, a pair of side wall portions 300Kb are located at positions spaced apart from each other along the device width direction D2. In addition, the pair of side wall portions 300Kb are formed to be substantially the same size when viewed from the device width direction D2, and each side wall portion 300Kb is connected to both ends of the assembly wall portion 300Ka in the device width direction D2.

[0044] In addition, the bottom wall portion 300Kc is formed in a substantially rectangular shape and is a plate-shaped wall portion with the device height direction D3 being the plate thickness direction. Figure 2 As shown, both ends of the bottom wall portion 300Kc in the device width direction D2 are connected to the ends of each side wall portion 300Kb located on the lower side in the device height direction D3.

[0045] Therefore, the assembly wall portion 300Ka, a pair of side wall portions 300Kb and a bottom wall portion 300Kc of the backlight housing 300 of this embodiment are formed as a whole, and are constructed to include an internal space portion 300S formed by the wall portion, an opening portion 300b opening in the front-to-back direction D1 of the device, and an opening portion 300c opening in the height direction D3 of the device.

[0046] The internal space of 300S is composed of Figure 2 The assembly wall 300Ka, the pair of side walls 300Kb and the bottom wall 300Kc are divided and formed (see Figure 3 ). In addition, the internal space portion 300S mentioned here refers to a portion that can hold the display unit 100, the circuit substrate 212 mounted with the LED chip 211, etc. by assembling any one of the wall portion 300Ka, the side wall portion 300Kb, and the bottom wall portion 300Kc. Therefore, the internal space portion 300S includes a space surrounded by a plurality of wall portions, a space divided by opposing wall portions, a space set along the wall surface of a wall portion, and the like.

[0047] The opening 300b is a portion that connects the inside and outside of the backlight housing 300, and is formed by dividing the opening 300b with a pair of side walls 300Kb. Figure 2 As shown, the opening 300b is located at the rear side in the device front-rear direction D1, and is divided and formed by being clamped by the rear end portions of each side wall portion 300Kb. Figure 3 As shown, the opening 300b is arranged at a distance from the assembly wall 300Ka and is located at a position facing the assembly wall 300Ka.

[0048] The opening 300c is a portion that connects the inside and outside of the backlight housing 300, and is formed by dividing the opening 300c with a pair of side walls 300kb. Figure 2 As shown, the opening 300c is located on the upper side in the device height direction D3, and is divided and formed by being clamped by the upper end portions of each side wall portion 300Kb. Figure 3 As shown, the opening portion 300c is arranged at a distance from the bottom wall portion 300Kc and is located at a position facing the bottom wall portion 300Kc.

[0049] [Circuit board]

[0050] Next, the structure of the circuit substrate 212 will be described in more detail. Figure 2 , Figure 3 As shown, the circuit board 212 is configured to include a main body portion 212 a on which the LED chip 211 is mounted and an extended portion 212 b formed to protrude from the main body portion 212 a .

[0051] like Figure 2 As shown, the main body 212a is formed in a substantially rectangular shape, and is a portion in which the front-back direction D1 of the device is the plate thickness direction. The main body 212a is configured to include a light source portion 212aa on which an LED chip 211 is mounted on one surface, and a connection portion 212ab connected to the connectors CN1 and CN2. In addition, the main body 212a is connected to the display portion 100 via the connector CN1, and is connected to the ground GND via the connector CN2.

[0052] The light source portion 212aa of the main body 212a is a portion disposed on the upper side in the device height direction D3. When assembled in the backlight housing 300, the light source portion 212aa is located between a pair of side walls 300Kb of the backlight housing 300, and is disposed in a position that closes the opening 300b by being disposed toward the bottom wall portion 300Kc along the device height direction D3. Figure 3As shown, the LED chip 211 mounted on the main body 212a is arranged at a distance from the display unit 100 assembled on the assembly wall 300Ka of the backlight housing 300, and is arranged opposite to the display unit 100. In addition, the main body 212a is assembled in a state where the LED chip 211 is accommodated in the internal space 300S of the backlight housing 300. In addition, the outer surface of the main body 212a located on the opposite side of the inner surface where the LED chip 211 is mounted is exposed to the outside of the backlight housing 300, and is assembled in a state adjacent to the side wall 300Kb and the bottom wall 300Kc of the backlight housing 300. Therefore, when the main body 212a is assembled to the backlight housing 300, it can constitute the device housing 10H of the display device 10 together with the backlight housing 300.

[0053] The connecting portion 212ab of the main body 212a is a portion provided at the lower side in the device height direction D3. The connecting portion 212ab is arranged outside the backlight housing 300 when assembled to the backlight housing 300. Figure 3 As shown, the connectors CN1 and CN2 connected to the main body 212a are arranged outside the backlight housing 300. The main body 212a allows current to flow from the connector CN2 to the ground GND, thereby suppressing noise caused by a potential difference.

[0054] In addition, if Figure 2 , Figure 3 As shown, the extension portion 212b is a portion bent in a direction intersecting the extension direction of the main body portion 212a. The extension portion 212b is configured to include a support portion 212ba extending from the main body portion 212a toward the display unit 100 and a contact portion 212bb extending from the end of the support portion 212ba, and the extension portion 212b is connected to the display unit 100 via the contact portion 212bb.

[0055] The support portion 212ba of the extended portion 212b is a portion formed continuously with the light source portion 212aa of the main body 212a, and is formed in a substantially rectangular shape. It is a portion that is bent along the device front-rear direction D1 that intersects the extension direction of the main body 212a so that the device height direction D3 becomes the plate thickness direction. When the support portion 212ba is assembled in the backlight housing 300, it is located between a pair of side wall portions 300Kb of the backlight housing 300, and is arranged in a position that closes the opening portion 300c by being arranged along the device front-rear direction D1 from the main body 212a toward the display unit 100. Furthermore, as Figure 3As shown, the extended portion 212b is configured in a manner that the outer surface is exposed toward the outside of the backlight housing 300, and is assembled in a state adjacent to the side wall portion 300Kb and the assembly wall portion 300Ka of the backlight housing 300. Therefore, when the extended portion 212b is assembled to the backlight housing 300, it can constitute the device housing 10H of the display device 10 together with the backlight housing 300.

[0056] The contact portion 212bb of the extended portion 212b is a portion protruding from the end of the support portion 212ba located on the front side in the device front-rear direction D1, and is a portion bent in a direction intersecting the extension direction of the support portion 212ba. Figure 2 As shown in FIG. 1 , the contact portion 212bb of the present embodiment is formed into a substantially rectangular shape and is formed into a strip shape along the device width direction D2. Figure 3 As shown, the display unit 100 is assembled in a state where the contact portion 212bb of the extended portion 212b contacts the back of the display unit 100, and is fixed by being clamped by the contact portion 212bb of the extended portion 212b and the assembly wall portion 300Ka. Therefore, the circuit substrate 212 receives electricity from the display unit 100 via the contact portion 212bb of the extended portion 212b, and allows the electricity to flow in the order of the extended portion 212b and the main body 212a, so that the electricity can flow from the connector CN2 connected to the main body 212a toward the ground GND.

[0057] The vehicle display device 1 described above includes a display device 10, which is mounted on a vehicle 400 and emits an image visually recognized as a virtual image Vi by a passenger 500 of the vehicle 400 as display light L2 toward a display surface 410 provided in the vehicle 400. In addition, the display device 10 includes: a circuit substrate (metal circuit substrate) 212, which is formed of a conductive plate-shaped metal material and has an LED chip 211 mounted thereon as a light source; a display unit 100, which is arranged opposite to the LED chip 211 and emits the display light L2; and a backlight housing 300, which accommodates the LED chip 211 and the display unit 100 therein. In addition, the circuit substrate 212 is configured to include a main body 212a on which the LED chip 211 is mounted and connected to the ground GND, and an extension portion 212b extending from the main body 212a toward the display unit 100. When the circuit substrate 212 is assembled in the backlight housing 300, the main body 212a is exposed to the outside of the backlight housing 300. Furthermore, the circuit substrate 212 is arranged in contact with the display unit 100 via the extension portion 212b, so that the display unit 100 is connected to the ground GND via the extension portion 212b and the main body 212a.

[0058] According to such a structure, the main body 212a of the circuit substrate 212 absorbs the heat generated when the LED chip 121a emits light, and the opposite side of the surface on which the LED chip 211 is mounted is exposed from the backlight housing 300, so that the heat can be efficiently dissipated to the outside. Therefore, the circuit substrate 212 can be used as a substitute for a heat sink (heat sink) without the need for a heat sink, so that the display device 10 can be miniaturized. In addition, the extended portion 212b of the circuit substrate 212 is configured in contact with the display unit 100, so that the electric charge carried by the display unit 100 can be moved from the display unit 100 toward the main body 212a to flow the current, and the current can flow from the main body 212a to the ground GND. Therefore, the circuit substrate 212 can suppress the noise generated by the potential difference between the parts, or prevent the noise generated by the discharge of static electricity from the display unit 100. In addition, the circuit substrate 212 is configured to partially cover the internal space (internal space portion 300S) that accommodates the display unit 100, and can therefore also function as a shielding member that shields noise generated by various components. Therefore, in addition to the function of the circuit substrate 212 as a circuit substrate on which the LED chip 211 is mounted, it can also function as a heat dissipation countermeasure and a noise countermeasure. Therefore, the vehicle display device 1 can appropriately implement noise countermeasures.

[0059] Furthermore, the vehicle display device 1 does not need to configure the heat dissipation countermeasure component and the noise countermeasure component with a component separate from the circuit board 212, so the number of components can be reduced. Therefore, the vehicle display device 1 can easily assemble the components.

[0060] Furthermore, the backlight housing 300 of the vehicle display device 1 described above has openings 300b and 300c that connect the inside and outside of the backlight housing 300. In addition, when the backlight housing 300 and the circuit board 212 are assembled with each other, the main body 212a and the extension portion 212b close the openings 300b and 300c of the backlight housing 300, thereby forming the device housing 10H of the display device 10. According to such a structure, the backlight housing 300 and the circuit board 212 are assembled with each other to form a box shape, and can form a housing. Therefore, the vehicle display device 1 can suppress the enlargement of the display device 10 by assembling the circuit board 212 provided with the extension portion 212b as a noise countermeasure to the backlight housing 300.

[0061] Furthermore, the backlight housing 300 of the vehicle display device 1 described above is made of a resin material. According to such a structure, the weight can be reduced compared to the case where the backlight housing 300 is made of a metal material or the like. In addition, by making the backlight housing 300 of a resin material having excellent processability, it can be easily formed into a desired shape.

[0062] In addition, the vehicle display device 1 of the present invention described above is not limited to the above-mentioned embodiment, and various changes can be made within the scope described in the claims.

[0063] For example, the main body portion 212 a and the extended portion 212 b of the circuit board 212 may be assembled in a state where they overlap with the wall portion 300K of the backlight housing 300 .

[0064] In addition, the form of the device housing 10H of the display device 10 is not particularly limited. Figure 2 The LED substrate 210 shown is assembled to the backlight housing 300, so that the device housing 10H of the display device 10 in this embodiment is composed of two wall portions (main body 212a and extension portion 212b) of the circuit substrate 212 and four wall portions (assembly wall portion 300Ka, a pair of side wall portions 300Kb and bottom wall portion 300Kc) of the backlight housing 300. However, there is no particular limitation on the combination of the wall portions constituting the device housing 10H of the display device 10 as long as the circuit substrate 212 is configured to include the main body 212a and the extension portion 212b. For example, in addition to the main body 212a and the extended portion 212b, the circuit substrate can also be constructed to include a pair of side wall portions that are spaced apart and opposite to each other along the device width direction D2. The backlight housing 300 can be composed only of the assembly wall portion 300Ka and the bottom wall portion 300Kc. The device housing 10H of the display device 10 can be composed of the four wall portions of the circuit substrate 212 and the two wall portions of the backlight housing 300.

[0065] In addition, from the viewpoint of weight reduction and processability, the constituent material of the backlight housing 300 is preferably made of a resin material, but is not particularly limited.

[0066] In addition, the vehicle display device 1 of the present embodiment may be configured by appropriately combining the components of the above-described embodiments and modified examples.

[0067] Description of Reference Numerals

[0068] 1 Display device for vehicle

[0069] 10 Display Devices

[0070] 10H Equipment housing

[0071] 100 Display unit

[0072] 200 Backlight

[0073] 210LED substrate

[0074] 211LED chip (light source)

[0075] 212 circuit substrate (metal circuit substrate)

[0076] 212a Main body

[0077] 212b Extension part

[0078] 300 Backlight housing

[0079] 300a, 300b, 300c openings

[0080] 400 vehicles

[0081] 410 display surface

[0082] 500 Drivers (passengers)

[0083] GND Ground

[0084] L1 Outgoing light

[0085] L1x optical axis

[0086] L1d Optical axis direction

[0087] L2 Display light

[0088] L3 reflected light

[0089] Vi virtual image

[0090] X Vehicle front and rear direction

[0091] Y Vehicle width direction

[0092] Z vehicle height direction

[0093] D1 front and back direction of the device

[0094] D2 device width direction

[0095] D3 device height direction

Claims

1. A vehicle display device, characterized in that: A display device is provided, the display device being mounted on a vehicle and emitting an image visually recognized as a virtual image by a passenger of the vehicle as display light toward a display surface provided on the vehicle, The display device comprises: a metal circuit substrate, the metal circuit substrate is formed of a conductive plate-shaped metal material and is mounted with a light source; a display unit, the display unit is arranged opposite to the light source and emits the display light; and a backlight housing, wherein the backlight housing accommodates the light source and the display unit, The metal circuit substrate is configured to include: a main body, the main body having the light source mounted thereon and connected to the ground; and an extension portion extending from the main body toward the display portion, wherein when the metal circuit substrate is assembled in the backlight housing, the main body is configured to be exposed to the outside of the backlight housing, and the extension portion is configured to be in contact with the display portion, thereby connecting the display portion to the ground via the extension portion and the main body.

2. The vehicle display device according to claim 1, wherein: The backlight housing has an opening that allows the inside and outside of the backlight housing to communicate with each other. When the backlight housing and the metal circuit substrate are assembled with each other, the main body and the extended portion close the opening of the backlight housing, thereby constituting a device housing of the display device.

3. The vehicle display device according to claim 1 or 2, characterized in that: The backlight housing is made of resin material.

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