Display device for vehicle

Abstract

A vehicle display device (1) is provided with a display device (100) that emits display light (L2) toward a display surface (410) of a vehicle (400), and a main case (300), the display device (100) having a display (110) including a display screen (111), a backlight (120) including an LED substrate (121), and a device case (130) in which the LED substrate (121) is assembled, the display screen (111) being disposed obliquely with respect to an optical axis (L1x) of the emitted light (L1), the LED substrate (121) being disposed facing the display screen (111), and the display screen (111) being disposed obliquely with respect to the optical axis (L1x) of the emitted light (L1). The plurality of LED chips (121a) are arranged so as to be staggered in a stepped manner in the optical axis direction (L1d) along the optical axis (L1x) along the inclination of the display screen (111).

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, a light source for illuminating the display, and a phase difference plate (λ-display plate or λ-plate) provided for display light emitted from the display.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6027727 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the vehicle display device described in the above-mentioned Patent Document 1, when external light enters the housing of the device, in order to prevent the light reflected by the display surface of the display mounted in the housing from returning to the eyes of the occupant, the display surface is arranged to be tilted relative to the optical axis. This may cause the housing of the display to become larger due to the tilt, and the vehicle display device as a whole to become larger. Therefore, there is room for further improvement in terms of vehicle mountability.

[0008] 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 achieving space saving.

[0009] Means for solving problems

[0010] In order to achieve the above-mentioned purpose, the vehicle display device involved in the present invention is characterized in that it comprises: a display device, which is mounted on a vehicle and emits an image as display light toward a display surface provided in the vehicle, which is visually recognized as a virtual image by the occupants of the vehicle; and a main shell, which accommodates the display device internally and has an opening portion for emitting the display light toward the display surface, the display device comprising: a display, which is configured to include a display screen capable of displaying the display light; a backlight, which is configured to include an LED substrate formed by mounting a plurality of LED chips on a substrate, and the backlight irradiates outgoing light to the display; and an equipment shell, which accommodates the backlight internally, the display screen is arranged obliquely relative to the optical axis of the outgoing light, the LED substrate is arranged opposite to the display screen, and the plurality of LED chips are arranged in a stepwise staggered manner in the optical axis direction along the optical axis along the inclination of the display screen.

[0011] Effects of the Invention

[0012] The vehicle display device of the present invention has the effect of achieving space saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing a schematic configuration of a vehicle display device according to an embodiment.

[0014] Figure 2 It is a diagram showing a schematic configuration of a display device constituting the vehicle display apparatus of the embodiment.

[0015] Figure 3 It is a diagram showing a schematic configuration of a display device constituting a vehicle display apparatus according to a modified example of the embodiment. DETAILED DESCRIPTION

[0016] 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.

[0017] [Example]

[0018] 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 in a dashboard of the vehicle 400 .

[0019] like Figure 1 , Figure 2As shown, the vehicle display device 1 includes a display 10 and a control unit (not shown), and the display 10 includes a display device 100, a reflector 200, and a main housing 300. In addition, the display device 100 includes: a display 110, which is configured to include a display screen 111 capable of displaying display light L2; a backlight 120, which is configured to include an LED substrate 121 as a light source; and a device housing 130. The vehicle display device 1 reflects the display light L2 emitted from the display device 100 toward a display surface 410 provided in the front of the vehicle 400 toward the eye point (visual position) EP side, so that the image projected on the display surface 410 can be visually recognized as a virtual image Vi displayed overlapping with the scenery observed from the eye point EP. The eye point EP for the vehicle display device 1 is the position of the viewpoint of the driver 500 who is an occupant of the vehicle 400, and is pre-conceived as a spatial area. In addition, the display surface 410 for reflecting the display light L2 emitted by the display device 100 is composed of a windshield WS disposed 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 (such as a synthesizer) disposed on the driver 500 side relative to the windshield WS. In addition, in the vehicle display device 1, the connection method between the various components used for power supply, control signals, various information, etc., can be any of wired connections via wiring materials such as wires and optical fibers (for example, also including optical communication via optical fibers, etc.) and wireless connections such as wireless communication and contactless power supply, unless otherwise specified.

[0020] Furthermore, the vehicle display device 1 of the present embodiment realizes space saving by staggering the LED substrates 121 in a stepwise manner along the inclination of the display panel 111. Figure 1 , Figure 2 Each structure of the vehicle display device 1 will be described in detail.

[0021] In addition, the width direction of the vehicle display device 1 is typically equivalent to the vehicle width direction Y of the vehicle 400 to which the vehicle display device 1 is applied. In addition, the depth direction of the vehicle display device 1 is typically equivalent to the front-rear direction X of the vehicle 400 to which the vehicle display device 1 is applied (in other words, the traveling direction of the vehicle 400). In addition, the front surface side of the vehicle display device 1 is the side opposite to the driver's seat surface 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.

[0022] In the following description, in the front-rear direction X of the vehicle 400, the side on which the vehicle 400 moves forward is sometimes referred to as the "front", and the side on which the vehicle 400 moves backward is sometimes referred to as the "rear". In the vehicle width direction Y of the vehicle 400, the left side when facing the front of the front-rear direction X is sometimes referred to as the "left side", and the right side when facing the front of the front-rear direction X is sometimes referred to as the "right side". In the height direction Z of the vehicle 400, 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". The directions used in the following description represent directions in a state where the components are assembled to each other unless otherwise specified.

[0023] In the following description, in the display device 100, light emitted from the display screen 111 of the display 110 is referred to as display light L2. In addition, parallel light emitted from the field lens 123 of the backlight 120 is referred to as output light L1, and the axis of the output light L1 is referred to as the optical axis L1x. In addition, the extending direction of the optical axis L1x is referred to as the optical axis direction L1d.

[0024] [monitor]

[0025] The display 10 is located between the windshield WS and the eye point EP in the front-rear direction X, and is a portion that enables the driver 500 to recognize the status of the vehicle 400 by projecting a virtual image Vi onto the windshield WS.

[0026] The display device 100 is a part that emits the display light L2 toward the reflector 200. The display device 100 can display an image on the display screen 111 of the display 110 by irradiating the outgoing light L1 from the backlight 120 to the display 110, and emit it as the display light L2. The details of the display device 100 will be described later.

[0027] The reflector 200 is a part that reflects the display light L2 toward the windshield WS. Figure 1 As shown, the reflector 200 has a concave reflective surface and can magnify the image. In addition, the shape of the reflective surface is, for example, a free-form surface, and can be set to a shape that can correct the distortion and aberration of the image.

[0028] The main housing 300 is made of a resin material or the like, and is formed into a box shape so as to accommodate the display device 100, the reflector 200, etc. in the interior (interior space 300S). Figure 1 As shown, the main housing 300 of the present embodiment is formed by a wall portion 300K, and has an assembly opening portion 300a into which the display device 100 can be assembled, and an opening portion 300b from which the display light L2 can be emitted to the outside.

[0029] like Figure 1As shown, the assembly opening 300a is located on the rear side of the main housing 300 and is formed in a manner of opening along the front-rear direction X. In addition, the display device 100 is assembled in a manner that the rear side of the device housing 130 is exposed to the outside of the main housing 300. Therefore, the display device 100 is assembled to the main housing 300 in a manner that the display light L2 emitted from the display 110 is emitted toward the front side, and the periphery of the display 110 is covered by the wall portion 300K, so that the display light L2 is blocked.

[0030] On the other hand, Figure 1 As shown, the opening 300b is provided in the wall portion 300Kb located on the upper side of the main housing 300 (the side where the display surface 410 is located), and is formed to be open along the height direction Z. Therefore, if the display light L2 emitted from the display 110 is directed toward the opening 300b via the reflector 200 or the like, the main housing 300 can emit the display light L2 toward the outside. Therefore, when the display 10 is mounted in the instrument panel, the display light L2 can be emitted toward the display surface 410 located on the upper side of the opening 300b. In addition, the opening 300b can also be closed by a transparent cover that allows the display light L2 to pass through.

[0031] [Control Department]

[0032] The control unit is configured as a microcomputer and is a part capable of controlling the display 10. The control unit can obtain the status of the vehicle 400 from a device or a server mounted on the vehicle 400. In addition, the control unit generates an image based on the acquired information and displays the image on the display screen 111 of the display 110, thereby being able to perform processing for overlapping and displaying the virtual image Vi with the scenery seen from the eye point EP.

[0033] [Display device]

[0034] Next, the details of the display device 100 are described.

[0035] The display 110 is a part that transmits the outgoing light L1 and emits the outgoing light L1 as display light L2. The display screen 111 of the display 110 is composed of a light-transmitting TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) or the like.

[0036] The backlight 120 is configured as a unit including an LED substrate 121 , a condenser lens 122 , and a field lens 123 .

[0037] The LED substrate 121 is configured to include a plurality of LED chips 121a and a substrate 121b on which each LED chip 121a can be mounted. The substrate 121b is made of a metal material such as aluminum, and is a component that is formed into a flat plate shape so that the LED chip 121a can be fixed on the surface of one side. On the other hand, the LED chip 121a 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. The LED chips 121a are arranged in a grid shape on the substrate 121b, and are arranged to be opposite to the display screen 111 when the substrate 121b is assembled in the device housing 130, thereby being able to emit light toward the display screen 111.

[0038] The condenser lens 122 is a lens made of glass or transparent resin. The condenser lens 122 has an incident surface made of a flat surface and an exit surface made of a convex curved surface, and is arranged so that the incident surface faces the LED chip 121a. Figure 2 As shown, the condenser lens 122 is provided for each LED chip 121 a , thereby being able to condense the light emitted from the LED chip 121 a .

[0039] The field lens 123 is a lens made of glass or transparent resin. The field lens 123 has an incident surface and an exit surface, and is arranged so that the incident surface faces the condenser lens 122. Figure 2 As shown, the field lens 123 is provided between the condenser lens 122 and the display screen 111 , thereby being able to adjust the traveling direction of the incident light respectively incident from the condenser lens 122 to a predetermined direction. Therefore, the backlight 120 can emit parallel light toward the display screen 111 .

[0040] The device housing 130 is made of a resin material or the like, and is formed into a box shape so as to accommodate the display 110, the backlight 120, etc. in the interior (internal space 130S). Figure 1 , Figure 2 As shown, the device housing 130 of this embodiment is formed by a wall portion 130K, and has an assembly opening 130 a to which the display 110 can be assembled and an assembly opening 130 b to which the LED substrate 121 constituting the backlight 120 can be assembled.

[0041] like Figure 1 , Figure 2As shown, the assembly opening 130a is formed so that, when the display device 100 is assembled to the main housing 300, the assembly opening 130a is located on the front side of the device housing 130 and is open along the front-rear direction X. In addition, the display screen 111 of the display 110 is assembled to the assembly opening 130a, so that it is arranged to be inclined in the inclined direction Z1 relative to the optical axis L1x of the emitted light L1 when it is mounted in the instrument panel. More specifically, the display screen 111 of the present embodiment is arranged to be inclined so that the end P1 located on the opening 300b side (display surface 410 side) of the main housing 300 in the height direction Z is formed to protrude toward the front side (the display screen 111 side in the optical axis direction L1d of the optical axis L1x) in the emission direction of the emitted light L1. At this time, the display device 100 arranges the end P1 of the display screen 111 at a position forward of the end P2 on the side opposite to the opening 300b, so that when the external light enters the main housing 300 through the opening 300b, the reflected light L3 reflected from the display screen 111 can be directed toward the end P2. Therefore, the display device 100 can change the path of the light so that the external light reflected from the display screen 111 does not return to the eyes of the driver 500 by being emitted from the opening 300b again along the incident path.

[0042] On the other hand, Figure 2 As shown, the assembly opening 130b is formed such that, when the display device 100 is assembled to the main housing 300, the assembly opening 130b is located at the rear side of the device housing 130 and is open along the front-rear direction X. In addition, the LED substrate 121 constituting the backlight 120 is assembled to a predetermined position of the wall 130K of the device housing 130 by means of fastening members such as screws, thereby being assembled in a manner to close the assembly opening 130b. In more detail, as Figure 2 As shown, the backlight 120 of the present embodiment is provided with a field lens 123, a condenser lens 122, and an LED substrate 121 in order from the display screen 111 side, and the LED substrate 121 is assembled at a position exposed to the outside of the main housing 300. In addition, the LED substrate 121 is formed so that, in the height direction Z, an end Q1 located on the opening 300b side (display surface 410 side) of the main housing 300 protrudes forward in the emission direction of the emitted light L1 more than an end Q2 located on the side opposite to the opening 300b side.

[0043] In addition, if Figure 2As shown, the substrate 121b of the LED substrate 121 of the present embodiment is formed in a stepped shape, and the substrate 121b is alternately formed with an opposing portion D and a connecting portion E, the opposing portion D is located at a position opposing the display screen 111, and the connecting portion E is located at a position intersecting with the opposing portion D and connecting the opposing portions D to each other. In addition, the LED substrate 121 is configured so that when assembled in the assembly opening 130b, the distance X1 from the opposing portion D of the substrate 121b to the display screen 111 is a constant value. In addition, by arranging the LED chips 121a on the opposing portions D of the LED substrate 121, the LED chips 121a are arranged opposite to the display screen 111, and are arranged staggered in a stepwise manner in the emission direction of the emitted light L1. Therefore, the LED substrate 121 can arrange the LED chips 121a along the inclination of the display screen 111, and the distance from the LED chips 121a to the display screen 111 can be made constant. In addition, the processing method of the substrate 121b is not particularly limited, and the substrate 121b can be formed into a step shape by bending or the like.

[0044] The display device 100 of this embodiment can reduce the height X2 of the backlight 120 accommodated in the internal space 130S by assembling the LED substrate 121 constructed as described above into the assembly opening 130b of the device housing 130. Figure 2 Compared with the case where the main housing 300 is formed along the height direction Z based on the position of the end portion Q2 shown, that is, when the base plate 121 b is formed in a straight line, the size (volume) of the main housing 300 becomes smaller.

[0045] In addition, the LED substrate 121 can increase the surface area by forming the substrate 121b into a step shape. Compared with the substrate 121b formed into a straight line, the surface area is increased by the amount of the connecting portion E located between the opposing portions D. Therefore, the LED substrate 121 can efficiently release the heat generated when the LED chip 121a emits light. In addition, the LED substrate 121 is assembled in a manner that the substrate 121b is assembled to the opening of the device housing 130 and one surface of the substrate 121b is exposed from the main housing 300, thereby being able to efficiently release the heat generated when the LED chip 121a emits light.

[0046] In addition, the substrate 121b of the LED substrate 121 is formed in a step shape, and thus, the external space portion S formed on the side opposite to the display screen 111 side across the LED substrate 121 is formed in a step shape along the inclination of the display screen 111. In addition, the end portion Q1 of the substrate 121b of the LED substrate 121 located on the upper side is formed to protrude toward the front side in the emission direction of the emitted light L1 compared with the end portion Q2 located on the lower side, and thus, the portion of the external space portion S located on the end portion Q1 side of the substrate 121b protrudes toward the display screen 111 side in the optical axis direction L1d relative to the portion located on the end portion Q2 side of the substrate 121b. Therefore, the external space portion S can release the heat generated when the LED chip 121a emits light upward.

[0047] The vehicle display device 1 described above comprises: a display device 100 mounted on a vehicle 400, which emits an image as display light L2 toward a display surface 410 provided in the vehicle 400 so that a driver 500 who is a passenger of the vehicle 400 can visually recognize the image as a virtual image Vi; and a main housing 300 which accommodates the display device 100 therein and has an opening 300b for emitting the display light L2 toward the display surface 410. In addition, the display device 100 comprises: a display 110 which includes a display screen 111 capable of displaying the display light L2; a backlight 120 which includes an LED substrate 121 having a plurality of LED chips 121a mounted on a substrate 121b and irradiates the display 110 with the emission light L1; and a device housing 130 which accommodates the LED substrate 121 therein. In addition, the display screen 111 is tilted relative to the optical axis L1x of the emitted light L1, the LED substrate 121 is arranged opposite to the display screen 111, and the plurality of LED chips 121a are staggered in a stepwise manner along the optical axis direction L1d along the optical axis L1x along the tilt of the display screen 111.

[0048] According to such a structure, the display device 100 can reduce the height X2 of the backlight 120 accommodated therein by staggering the LED chips 121a of the LED substrate 121 in a stepwise manner. Therefore, compared with the case where the LED chips 121a are arranged in a straight line, the display device 100 can reduce the volume, and accordingly, the vehicle display device 1 can reduce the volume of the portion exposed outside the main housing 300. Therefore, the vehicle display device 1 can achieve space saving.

[0049] Furthermore, the substrate 121b described above is formed into a step shape by a metal material along the inclination of the display screen 111, and the LED chips 121a are respectively arranged on the surface (opposing portion D) of the substrate 121b formed into a step shape and facing the display screen 111. According to such a structure, the substrate 121b is formed into a step shape, so that the surface area can be increased compared to a straight line shape. Therefore, the LED substrate 121 can efficiently dissipate the heat generated when the LED chip 121a emits light through the substrate 121b.

[0050] Furthermore, the display screen 111 of the vehicle display device 1 described above is configured so that when external light enters the main housing 300 via the opening 300b, the reflected light L3 reflected by the display screen 111 is inclined relative to the optical axis L1x of the emitted light L1 in a manner toward the side opposite to the side where the opening 300b is located. In addition, the external space portion S formed on the side opposite to the display screen 111 side across the LED substrate 121 is formed in a stepped shape along the inclination of the display screen 111, and the portion located on the side of the opening 300b protrudes toward the display screen 111 side in the optical axis direction L1d relative to the portion located on the side opposite to the opening 300b side. According to such a structure, the display device 100 can suppress the volume of the portion located on the side of the opening 300b (the portion located on the upper side in the height direction Z) compared to when the LED chip 121a is arranged in a straight line. In addition, when the gas around the LED substrate 121 expands due to the heat generated when the LED chip 121a emits light and the gas is released upward, the display device 100 can efficiently release the heat contained in the gas to the outside of the main shell 300 by efficiently releasing the gas.

[0051] 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.

[0052] For example, the tilt direction Z1 of the display screen 111 is not particularly limited. Figure 2 As shown, the end P1 of the display screen 111 located on the opening 300b side of the main housing 300 is formed to protrude forward, but the end P2 located on the opposite side of the opening 300b may also be formed to protrude forward.

[0053] In addition, the method of assembling the LED substrate 121 relative to the device housing 130 is not particularly limited, and the shape of the substrate 121b of the LED substrate 121 is not particularly limited as long as the LED chips 121a are arranged along the tilt of the display screen 111 and are arranged in a stepwise staggered manner in the optical axis direction L1d along the optical axis L1x. Figure 2As shown in the figure, the case where the LED substrate 121 is directly assembled to the assembly opening 130b of the device case 130 is described, but it can also be indirectly assembled via other structural members that can be assembled to the assembly opening 130b.

[0054] For example, Figure 3 The display device 100A is applied to the vehicle display apparatus 1A according to the modification. The display device 100A includes a display 110 , a backlight 120A, and a device case 130 , and further includes a heat sink 600 that can be assembled to an assembly opening 130 b of the device case 130 .

[0055] The heat sink 600 is a so-called heat sink, and is made of a metal material. In addition, the heat sink 600 is formed in a stepped shape along the inclination of the display screen 111, and alternately forms an opposing portion DA and a connecting portion EA, the opposing portion DA is located at a position opposite to the display screen 111, and the connecting portion EA is located at a position intersecting the opposing portion DA. In addition, the heat sink 600 is formed so that the end R1 located on the opening portion 300b side (display surface 410 side) of the main housing 300 in the height direction Z protrudes forward in the emission direction of the emitted light L1 more than the end R2 located on the side opposite to the opening portion 300b side.

[0056] In addition, the backlight 120A is configured to include a plurality of LED substrates 121A, a condenser lens 122, and a field lens 123. The LED substrate 121A includes a substrate 121bA formed in a strip shape and a plurality of LED chips 121a arranged in a straight line on the substrate 121bA. The LED substrates 121A are respectively assembled to the opposing portions DA of the heat sink 600 by fastening members such as screws. Furthermore, the heat sink 600 assembled with the LED substrates 121A is assembled to a predetermined portion of the wall 130K of the device housing 130, thereby being assembled in a manner to close the assembly opening 130b. Therefore, each LED chip 121a is arranged together with the substrate 121bA on the surface of the heat sink 600 formed in a stepped shape and facing the display screen 111, and is arranged to be staggered in a stepped manner in the optical axis direction L1d along the optical axis L1x along the inclination of the display screen 111.

[0057] In addition, the external space portion SA formed on the side opposite to the display screen 111 across the LED substrate 121A is formed in a stepped shape in the same manner as the external space portion S described above, and the portion located on the opening portion 300b side protrudes forward in the emission direction of the emitted light L1 relative to the portion located on the side opposite to the opening portion 300b.

[0058] According to such a structure, the heat sink 600 is configured such that the distance from the opposing portion DA to the display screen 111 is constant, similarly to the substrate 121b described above, thereby making it possible to make the distance from the LED chip 121a to the display screen 111 constant. In addition, by assembling the LED substrate 121A on the heat sink 600 having high thermal conductivity, the heat generated when the LED chip 121a emits light can be efficiently dissipated through the heat sink 600. In addition, the display device 100A can suppress the height of the backlight 120A housed inside, similarly to the display device 100 described above, and accordingly, the vehicle display device 1A can suppress the volume of the portion exposed to the outside of the main housing 300. Therefore, the vehicle display device 1A can achieve space saving. In addition, further, the external space portion SA is formed in a step-like shape along the inclination of the display screen 111, similarly to the external space portion S described above, so that the heat generated when the LED chip 121a emits light can be efficiently released to the outside of the main housing 300.

[0059] In addition, the vehicle display device 1 , 1A of the present embodiment may be configured by appropriately combining the components of the above-described embodiment and modified examples.

[0060] Description of Reference Numerals

[0061] 1.1A Vehicle display device

[0062] 100, 100A display device

[0063] 111 Display

[0064] 110 Display

[0065] 120, 120A backlight

[0066] 121, 121A LED substrate

[0067] 121a LED chip

[0068] 121b, 121bA substrate

[0069] 130 Equipment housing

[0070] 200 Reflector

[0071] 300 main housing

[0072] 300b Opening of the main housing

[0073] 400 vehicles

[0074] 410 display surface

[0075] 500 Drivers (crew)

[0076] L1 Outgoing light

[0077] L1x optical axis

[0078] L1d Optical axis direction

[0079] L2 Display light

[0080] L3 reflected light

[0081] S, SA External Space Department

[0082] Vi virtual image

[0083] X front and back direction

[0084] Y Vehicle width direction

[0085] Z height direction

[0086] Z1 Tilt direction

Claims

1. A vehicle display device, characterized in that: have: A display device mounted on a vehicle, the display device emitting an image as a virtual image visually recognized by an occupant of the vehicle as display light toward a display surface provided on the vehicle; as well as a main housing, the main housing accommodating the display device therein and having an opening for emitting the display light toward the display surface, The display device comprises: a display, the display being configured to include a display screen capable of displaying the display light; a backlight, the backlight being configured to include an LED substrate in which a plurality of LED chips are mounted on a substrate, and the backlight irradiates the display with emitted light; and a device housing, the device housing housing the backlight. The display screen is arranged to be tilted relative to the optical axis of the emitted light, The LED substrate is arranged opposite to the display screen. The plurality of LED chips are arranged to be staggered in a stepwise manner in an optical axis direction along the optical axis along the inclination of the display panel.

2. The vehicle display device according to claim 1, wherein: The substrate is formed into a step shape by a metal material along the inclination of the display screen. The LED chips are arranged on a surface of the substrate formed in a step shape that faces the display panel.

3. The vehicle display device according to claim 1, wherein: The display device has a heat dissipation plate, which is formed into a stepped shape along the inclination of the display screen by a metal material. The LED chips are arranged on a surface of the heat dissipation plate formed in a stepped shape that faces the display panel.

4. The vehicle display device according to any one of claims 1 to 3, characterized in that: The display screen is arranged obliquely with respect to the optical axis of the emitted light so that when external light enters the main housing through the opening, the reflected light reflected by the display screen is directed toward the side opposite to the side where the opening is located. The external space portion formed on the side opposite to the display screen sandwiching the LED substrate is formed in a stepped shape along the inclination of the display screen, and the portion of the external space portion located on the opening side protrudes toward the display screen side in the optical axis direction relative to the portion on the side opposite to the opening side.

Images