Vehicle display device

Abstract

A vehicle display device (1) comprises a display device (100) that emits display light (L2) towards a display surface (410) of a vehicle (400) and a main housing (300). The display device (100) comprises a display (110) that includes a display screen (111), a backlight (120) that includes an LED substrate (121), and a device housing (130) on which the LED substrate (121) is mounted. The display screen (111) is arranged so that it is inclined with respect to an optical axis (L1x) of the emitted light (L1). The LED substrate (121) is arranged so that it faces the display screen (111). The multitude of LED chips (121a) are arranged along an inclination of the display screen (111) such that they are offset stepwise with respect to the optical axis direction (L1d) along the optical axis (L1x).

Description

Area

[0001] The present invention relates to a vehicle display device. background

[0002] For example, patent literature 1 discloses a vehicle display device comprising a display device, a light source illuminating the display device, and a delay plate (λ / 4 plate or λ / 2 plate) provided to indicate light emitted by the display device. Citation list for patent literature

[0003] Patent literature 1: Japanese patent no. JP 6 027 727 B2 Summary: Technical Task

[0004] However, if external light enters the housing of the vehicle display device described in patent literature 1 above, and the display surface is inclined relative to the optical axis to prevent light reflected from the display surface of the device mounted in the housing from returning to the occupant's eyes, the housing of the device, and consequently the entire vehicle display device, may become large due to the inclination. Therefore, there is potential for improvement regarding its suitability for mounting on the vehicle.

[0005] The present invention was made in light of the above circumstances and one of its aims is to provide a vehicle display device that can achieve space savings. Solution to the task

[0006] To achieve the aforementioned objective, a vehicle display device according to the present invention comprises: a display device which is mounted on a vehicle and emits as a display light an image which is to be visually recognized as a virtual image by an occupant of the vehicle in the direction of a display surface provided on the vehicle;and a main housing containing the display device and having an opening through which the display light is emitted towards the display surface, the display device comprising a display including a display screen capable of displaying the display light, a backlight comprising an LED substrate with a plurality of LED chips mounted on a substrate, the backlight illuminating the display with emission light, and a device housing containing the backlight, the display screen being arranged to be inclined with respect to an optical axis of the emission light, the LED substrate being arranged facing the display screen, and the plurality of LED chips being arranged along an inclination of the display screen being offset stepwise with respect to an optical axis direction along the optical axis. Advantageous effects of the invention

[0007] The vehicle display device according to the present invention can achieve a space saving. Brief description of the drawings Fig. Figure 1 is a view showing a schematic configuration of a vehicle display device according to one embodiment. Fig. Figure 2 is a view showing a schematic configuration of a display device that forms the vehicle display device according to the embodiment. Fig. Figure 3 is a view showing a schematic configuration of a display device that forms a vehicle display device according to a modification of the embodiment. Description of embodiments

[0008] An embodiment of the present invention is described in detail below with reference to the drawings. It should be noted that the invention is not limited to these embodiments. Additionally, components in the following embodiments include those that can be easily replaced by a person skilled in the art or those that are essentially the same. [Version]

[0009] A vehicle display device 1 is used in a vehicle 400, such as an automobile, and is a setup display device that is mounted in a control panel (not shown) provided on a dashboard of the vehicle 400.

[0010] As in the Fig. 1 and Fig. As shown in Figure 2, the vehicle display device 1 comprises a display unit 10 and a control unit (not shown), and the display unit 10 comprises a display device 100, a mirror 200, and a main housing 300. The display device 100 also comprises a display 110, which includes a display screen 111 capable of displaying indicator light L2, a backlight 120 comprising an LED substrate 121 as a light source, and a device housing 130. The vehicle display device 1 reflects the indicator light L2 emitted by the display device 100 toward a display surface 410 provided in the front section of the vehicle 400, toward the side of the eyepoint (viewing position) EP, so that the image reflected at the display surface 410 can be visually perceived as a virtual image Vi, which is seen as an overlapping scene from the eyepoint EP.The eyepoint EP with respect to the vehicle display device 1 is the position of a driver 500, who is an occupant of the vehicle 400, and is presupposed to be a spatial area. Furthermore, the display surface 410, on which the display light L2 emitted by the display device 100 is reflected, is formed by a windscreen WS provided in the front section of the vehicle 400. However, the shape of the display surface 410 is not specifically restricted and could, for example, be a transparent or translucent panel (such as a combiner) provided on the driver 500's side of the windscreen WS.Furthermore, unless otherwise specified, the vehicle display device 1 may include a connection method between the respective components for supplying power, transmitting and receiving control signals, various types of information and the like, which may be any wired connection (for example, optical communication via an optical fiber is also included) via a wiring element, such as an electrical conductor or an optical fiber, and a wireless connection, such as wireless communication or contactless power supply.

[0011] The vehicle display device 1 of the present embodiment achieves space savings by arranging the LED substrate 121 such that it is offset in steps along the inclination of the display screen 111. Each configuration of the vehicle display device 1 is described in detail below with reference to the Fig. 1 and Fig. 2 described.

[0012] The width direction of the vehicle display device 1 typically corresponds to the width direction Y of the vehicle 400 in which the vehicle display device 1 is installed. The depth direction of the vehicle display device 1 typically corresponds to the front-to-back direction X (in other words, the direction of travel of the vehicle 400) of the vehicle 400 in which the vehicle display device 1 is installed. The front surface of the vehicle display device 1 is the side facing the driver's seat of the vehicle 400 and typically corresponds to a side that can be visually perceived by the driver 500 sitting in the driver's seat. On the other hand, the rear surface of the vehicle display device 1 is the side opposite the front surface in the depth direction and typically corresponds to the side that is mounted in the instrument panel.

[0013] In the following description, in the front-back direction X of vehicle 400, a side on which vehicle 400 moves forward can be referred to as a "front" and a side on which vehicle 400 moves backward can be referred to as a "rear". In the width direction Y of vehicle 400, a left side facing forward in the front-back direction X can be referred to as a "left side" and a right side facing forward in the front-back direction X can be referred to as a "right side". In the height direction Z of vehicle 400, an upper side in the vertical direction can be referred to as a "top" and a lower side in the vertical direction can be referred to as a "bottom". Each direction used in the following description indicates a direction in a state in which each part is assembled, unless otherwise specified.

[0014] In the following description, light emitted from the display screen 111 of the display 110 in the display device 100 is referred to as display light L2. Furthermore, parallel light emitted from a field lens 123 of the backlight 120 is referred to as emission light L1, and one axis of the emission light L1 is referred to as an optical axis L1x. The direction of extension of the optical axis L1x is also referred to as an optical axis direction L1d. [Display setup]

[0015] The display device 10 is arranged between the windscreen WS and the eye point EP with respect to the front-back direction X and is a section that can cause the driver 500 to recognize the state of the vehicle 400 by projecting the virtual image Vi onto the windscreen WS.

[0016] The display device 100 emits the indicator light L2 towards the mirror 200. When the emission light L1 from the backlight 120 is emitted onto the display 110, the display device 100 can display an image on the display screen 111 of the display 110 and output the image as indicator light L2. Details of the display device 100 will be described later.

[0017] Mirror 200 reflects the indicator light L2 towards the windshield WS. As in Fig. As shown in Figure 1, mirror 200 has a concave reflective surface and can magnify an image. It should be noted that the shape of the reflective surface is, for example, a freeform surface and can be a shape that corrects image distortion and aberration.

[0018] The main housing 300 is formed from a resin material or the like and is designed in a box shape so that the display device 100, the mirror 200, and the like can be accommodated on the inside (internal section 300S). As shown in Fig. As shown in Figure 1, the main housing 300 of the present embodiment is formed by a wall section 300K and includes a mounting opening 300a on which the display device 100 can be mounted and an opening 300b through which the display light L2 can be emitted towards the outside.

[0019] As in Fig. As shown in Figure 1, the mounting opening 300a is located on the rear of the main housing 300 and is designed to open along the front-to-back direction X. Furthermore, the display device 100 is mounted such that the rear of the device housing 130 is exposed to the outside of the main housing 300. Therefore, the display device 100 is mounted on the main housing 300 in such a way that the indicator light L2 emitted by the display 110 is directed towards the front, and the area surrounding the display 110 is covered by the wall section 300K, thus shielding the indicator light L2.

[0020] On the other side, the opening is 300b, as in Fig. As shown in Figure 1, the display device 10 is provided in a wall section 300Kb, which is located on the top (the side on which the display surface 410 is arranged) of the main housing 300 and is designed to open along the vertical direction Z. Therefore, when the display light L2 emitted by the display 110 is directed towards the opening 300b via the mirror 200 or the like, the main housing 300 can emit the display light L2 towards the outside. Therefore, the display device 10 can emit the display light L2 towards the display surface 410, which is located above the opening 300b, when it is mounted in the instrument panel. The opening 300b can be closed by a transparent cover that allows the display light L2 to pass through. [Control unit]

[0021] The control unit is configured as a microcomputer and can control the display device 10. The control unit can receive information about the status of the vehicle 400 from a device mounted on the vehicle 400, a server, or the like. Furthermore, the control unit generates an image based on the received information and displays the image on the display screen 111 of the display 110, thereby processing the overlay and display of the virtual image Vi in color for viewing from the eye point EP. [Display device]

[0022] Next, details of the display device 100 will be described.

[0023] The display 110 is a section that emits the emission light L1 as the display light L2 by transmitting the emission light. The display screen 111 of the display 110 comprises a transmissive thin-film transistor (TFT) liquid crystal display or the like.

[0024] The backlight 120 is a unit comprising an LED substrate 121, a converging lens 122 and a field lens 123.

[0025] The LED substrate 121 comprises a multitude of LED chips 121a and a substrate 121b on which each LED chip 121a can be mounted. The substrate 121b is made of a metallic material, such as aluminum, and is an element that can fix the LED chip 121a to a surface by being formed in a flat plate shape. Furthermore, the LED chip 121a is a light source comprising a light-emitting diode and is an element that emits light when current is supplied from a power source (not shown), such as a secondary battery of the vehicle 400. The LED chips 121a are arranged in a grid pattern on the substrate 121b and are positioned so that they face the display screen 111 when the substrate 121b is mounted on the device housing 130, thus allowing light to be emitted towards the display screen 111.

[0026] The converging lens 122 is a lens made of glass or a transparent resin. The converging lens 122 has an incidence surface formed by a flat surface and an emission surface formed by a convexly curved surface, and is arranged such that the incidence surface faces the LED chip 121a. As shown in Fig. As shown in Figure 2, each of the collecting lenses 122 is provided on the LED chip 121a so that light emitted by the LED chip 121a can be collected.

[0027] The field lens 123 is a lens made of glass or a transparent resin. The field lens 123 has an incidence surface and an emission surface and is arranged such that the incidence surface faces the converging lens 122. As shown in Fig. As shown in Figure 2, the field lens 123 is positioned between the converging lens 122 and the display screen 111, allowing the direction of the incident light entering through the converging lens 122 to be set to a predetermined direction. Therefore, the backlight 120 can emit parallel light towards the display screen 111.

[0028] The device housing 130 is formed from a resin material or the like and is formed in a box shape so that the display 110, the backlight 120, and the like can be accommodated in the interior (the interior section 130S). As shown in the Fig. 1 and Fig. As shown in Figure 2, the device housing 130 of the present embodiment is formed by a wall section 130K and includes a mounting opening 130a on which the display 110 can be mounted and a mounting opening 130b on which the LED substrate 121 can be mounted, which forms the backlight 120.

[0029] As in the Fig. 1 and Fig. As shown in Figure 2, the mounting opening 130a is located on the front of the device housing 130 and is designed to open along the front-to-back direction X in a state in which the display device 100 is mounted on the main housing 300. Furthermore, the display screen 111 of the display 110 is mounted on the mounting opening 130a and is arranged to be inclined in a direction Z1 with respect to the optical axis L1x of the emitted light L1 when mounted in the instrument panel. In particular, the display screen 111 of the present embodiment is inclined such that an end section P1, which is located on the side of the opening 300b (the side of the display surface 410) of the main housing 300 in the vertical direction Z, is designed to project forward (the side of the display screen 111 in the optical axis direction L1d of the optical axis L1x) in the emission direction of the emitted light L1.At this point, in the display device 100, the end section P1 of the display screen 111 is arranged on the front of the end section P2, which is located on the opposite side to the side of the opening 300b, so that a reflected light L3, reflected from the display screen 111, can be directed towards one side of the end section P2 when the external light enters the main housing 300 through the opening 300b. 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 re-emitted from the opening 300b after following the path of incidence.

[0030] On the other side is the mounting opening 130b, as shown in Fig. The opening 130b, as shown in Figure 2, is located on the rear of the device housing 130 and is designed to open along the front-to-back direction X in a state in which the display device 100 is mounted on the main housing 300. The LED substrate 121, which forms the backlight 120, is mounted to a predetermined section of the wall section 130K of the device housing 130 with a fastening element, such as a screw, so that it closes the mounting opening 130b.

[0031] In particular, as in Fig. As shown in Figure 2, in the backlight 120 of the present embodiment, the field lens 123, the converging lens 122, and the LED substrate 121 are arranged in that order from the side of the display screen 111, and the LED substrate 121 is mounted in a position exposed to the outside of the main housing 300. In the LED substrate 121, an end section Q1, located on the side of the opening 300b (the side of the display area 410) of the main housing 300 in the vertical direction Z, projects forward in the emission direction of the emission light L1 from an end section Q2, which is located on the opposite side to the side of the opening 300b.

[0032] In the LED substrate 121 of the present embodiment, as described in Fig. As shown in Figure 2, the substrate 121b is configured in a stepped form and is alternately configured with an facing section D, which is arranged to face the display screen 111, and a connecting section E, which is arranged to cross the facing section D and connect the facing sections D to each other. Furthermore, the LED substrate 121 is configured such that a distance X1 from the facing section D of the substrate 121b to the display screen 111 is a constant value when mounted at the mounting opening 130b. Additionally, by arranging the LED chip 121a on each of the facing sections D of the LED substrate 121, the LED chip 121a is positioned to face the display screen 111 and is arranged to be offset in steps with respect to the emission direction of the emission light L1.Therefore, in the LED substrate 121, the LED chip 121a can be arranged along the inclination of the display screen 111, and the distance from the LED chip 121a to the display screen 111 can be set to a constant value. The processing method of the substrate 121b is not specifically limited, and the substrate is formed in a stepped shape by bending or the like.

[0033] In the display device 100 of the present embodiment, the LED substrate 121, configured as described above, is mounted at the mounting opening 130b of the device housing 130, thereby reducing the height X2 of the backlight 120 contained within the internal section 130S. Therefore, the main housing 300 has a smaller size (volume) than if the substrate 121b were formed along the vertical direction Z, with respect to the position of the end section Q2, as shown in Fig. 2 is shown, i.e., when substrate 121b is formed linearly.

[0034] Furthermore, the surface area of ​​the LED substrate 121 can be increased because the substrate 121b is formed in a stepped shape. Compared to the case where the substrate 121b is formed in a linear shape, the surface area of ​​the substrate is increased by the extent of the connecting section E, which is arranged between the facing sections D. Therefore, the LED substrate 121 can effectively dissipate heat generated when the LED chip 121a emits light. Moreover, since the substrate 121b is mounted in the opening of the device housing 130 and an area of ​​the substrate 121b is mounted so that it is exposed to the main housing 300, heat generated when the LED chip 121a emits light can be effectively dissipated in the LED substrate 121.

[0035] Since the substrate 121b of the LED substrate 121 is formed in a step shape, an outer space section S, which is formed on the opposite side to the side of the display screen 111, with the LED substrate 121 arranged in between, is also formed in a step shape along the inclination of the display screen 111. Furthermore, the outer space section S, since the end section Q1 of the LED substrate 121, which is arranged on the top of the substrate 121b, is designed such that it projects forward from the end section Q2, which is arranged on the bottom side in the emission direction, in the emission direction of the emission light L1, is arranged such that it projects towards the display screen 111 in the optical axis direction L1d with respect to the section of the substrate 121b which is arranged on the side of the end section Q1 with respect to the section which is arranged on the side of the end section Q2 of the substrate 121b.Therefore, the outer space section S can release heat upwards, which is generated when the LED chip 121a emits light.

[0036] The vehicle display device 1 described above comprises the display device 100, which is mounted on the vehicle 400 and emits an image such that it is visually recognized as the virtual image Vi by the driver 500, who is an occupant of the vehicle 400, as the indicator light L2 in the direction of the display surface 410 provided in the vehicle 400, and the main housing 300, which accommodates the display device 100 and has the opening 300b that emits the indicator light L2 in the direction of the display surface 410. Furthermore, the display device 100 comprises the display 110, which includes the display screen 111, which can display the indicator light L2, the backlight 120, which includes the LED substrate 121, on which a plurality of LED chips 121a are mounted on a substrate 121b and illuminates the display 110 with the emission light L1, and the device housing 130, which accommodates the LED substrate 121 therein.Furthermore, the display screen 111 is arranged so that it is inclined with respect to the optical axis L1x of the emission light L1, the LED substrate 121 is arranged so that it faces the display screen 111, and the plurality of LED chips 121a are arranged along the inclination of the display screen 111 so that they are offset stepwise with respect to the optical axis direction L1d along the optical axis L1x.

[0037] Since the LED chip 121a of the LED substrate 121 is arranged in a stepped configuration, the height X2 of the backlight 120 incorporated in the display device 100 can be reduced according to this configuration. Therefore, the display device 100 can reduce its volume compared to the case in which the LED chip 121a is arranged linearly, and consequently, the vehicle display device 1 can reduce the volume of the section exposed to the outside of the main housing 300. Therefore, the vehicle display device 1 can achieve a space saving.

[0038] Furthermore, the previously described substrate 121b is formed from a metal material in a stepped shape along the inclination of the display screen 111, and each of the LED chips 121a is arranged on a surface (facing section D) in the substrate 121b, which is formed in a stepped shape, that faces the display screen 111. According to this configuration, because the substrate 121b is formed in a stepped shape, the surface area can be increased compared to a linear substrate. Therefore, the LED substrate 121 can effectively dissipate heat generated when the LED chip 121a emits light.

[0039] Furthermore, the display screen 111 of the vehicle display device 1 described above is arranged such that it is inclined with respect to the optical axis L1x of the emission light L1 such that the reflected light L3, which is reflected by the display screen 111, is directed to the opposite side to the side where the opening 300b is located when the external light enters the main housing 300 through the opening 300b.Furthermore, the outer space section S, which is formed on the side opposite to the side of the display screen 111, with the LED substrate 121 arranged between them, is formed in a stepped shape along the inclination of the display screen 111, and a section arranged on the side of the opening 300b is arranged such that it projects in the direction of the side of the display screen 111 in the optical axis direction L1d with respect to a section arranged on the side opposite to the side of the opening 300b. According to such a configuration, the display device 100 can contain the volume of the section arranged on the side of the opening 300b (the section arranged on the top in the vertical direction Z) compared to the case in which the LED chip 121a is arranged linearly.Furthermore, when the gas around the LED substrate 121 expands due to the heat generated when the LED chip 121a emits light and the gas tries to escape upwards, the display device 100 can effectively release the heat contained in the gas to the outside of the main body 300 by effectively releasing the gas.

[0040] It should be noted that the vehicle display device 1 of the present invention described above is not limited to the embodiment described above and various modifications can be made within the scope described in the claims.

[0041] For example, the tilt direction Z1 of the display screen 111 is not specifically restricted. As in Fig. As shown in Figure 2, the display screen 111 is described such that the end section P1, which is arranged on the side of the opening 300b of the main housing 300, projects forward. However, the end section P2, which is arranged on the side opposite the side of the opening 300b, can also project forward.

[0042] Furthermore, a method for mounting the LED substrate 121 on the device housing 130 is not specifically limited, and the shape of the substrate 121b of the LED substrate 121 is not specifically limited, as long as the LED chip 121a is arranged along the inclination of the display screen 111 and is arranged such that it is offset in steps with respect to the optical axis direction L1d along the optical axis L1x. As in Fig. As shown in Figure 2, the LED substrate 121 is described as being mounted directly on the mounting opening 130b of the device housing 130, but can be mounted indirectly via another construction element which can be mounted on the mounting opening 130b.

[0043] For example, Fig. 3 represents a display device 100a, which is used in a vehicle display device 1a according to a modification. The display device 100a comprises a display 110, a backlight 120a and a device housing 130 and further comprises a radiation plate 600, which can be mounted on the mounting opening 130b of the device housing 130.

[0044] The radiation plate 600 is a so-called heat sink and is made of metal. Furthermore, the radiation plate 600 is formed in a stepped shape along the inclination of the display screen 111, and an opposing section DA, which faces the display screen 111, and a connecting section EA, which intersects the opposing section DA, are arranged alternately. Additionally, the radiation plate 600 has an end section R1, which is arranged on the side of the opening 300b (the side of the display area 410) of the main housing 300 in the vertical direction Z, such that it projects forward in the emission direction of the emission light L1 from an end section R2, which is arranged on the side opposite the side of the opening 300b.

[0045] The backlight 120a comprises a plurality of LED substrates 121a, a converging lens 122, and a field lens 123. The LED substrate 121a comprises a ribbon-shaped substrate 121bA and a plurality of LED chips 121a arranged linearly on the substrate 121bA. The LED substrates 121a are each mounted to the facing sections DA of the emitting plate 600 using fasteners such as screws. The emitting plate 600, to which the LED substrate 121A is mounted, is then assembled to close the mounting opening 130b by being attached to a predetermined section of the wall section 130K of the device housing 130.Therefore, each of the LED chips 121a together with the substrate 121bA is arranged on the surface facing the display screen 111 in the emission plate 600, which is designed in a stepped shape and is arranged along the inclination of the display screen 111 such that it is offset stepwise with respect to the optical axis direction L1d along the optical axis L1x.

[0046] Furthermore, an external space section SA, which is formed on the side opposite to the side of the display screen 111, with the LED substrate 121a arranged in between, is formed in a stepped shape similar to the external space section S, as described above, and a section which is arranged on the side of the opening 300b is arranged such that it projects forward in the emission direction of the emission light L1 with respect to a section which is arranged on the side opposite to the side of the opening 300b.

[0047] According to such a configuration, the emitting plate 600 is configured similarly to the substrate 121b described above, such that the distance from the facing section DA to the display screen 111 has a constant value, thereby allowing the distance from the LED chip 121a to the display screen 111 to be fixed at a constant value. Furthermore, the LED substrate 121a can effectively dissipate heat generated when the LED chip 121a emits light via the emitting plate 600, as it is mounted on the emitting plate 600, which has high thermal conductivity. Additionally, the display device 100a can limit the height of the backlight 120a contained within it, similar to the display device 100 described above, and accordingly, the vehicle display device 100a can limit the volume of the section exposed to the outside of the main housing 300.Therefore, the vehicle display device 1a can achieve a space saving. Furthermore, in a similar manner to the external space section S described above, the external space section SA is formed in a stepped shape along the inclination of the display screen 111, so that heat generated when the LED chip 121a emits light can be effectively dissipated to the outside of the main housing 300.

[0048] It should be noted that the vehicle display devices 1 and 1a according to the present embodiment can be formed by a suitable combination of the components of the embodiments and modifications described above. Reference symbol list 1, 1a Vehicle display device 100, 100a Display device 111 Display screen 110 display 120, 120a Backlight 121, 121a LED substrate 121a LED chip 121b, 121bA Substrat 130 device housings 200 mirrors 300 main cases 300b Opening of the main case 400 vehicles 410 display area 500 drivers (passengers) L1 emission light L1x optical axis L1d optical axis direction L2 indicator light L3 reflected light S, SA Exterior section Vi virtual image X front-back direction Y Vehicle width direction Z Altitude direction Z1 Inclination direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 6 027 727 B2

[0003]

Claims

[1] Vehicle display device comprising: a display device mounted on a vehicle which, as a display light, emits an image intended to be visually recognized as a virtual image by an occupant of the vehicle towards a display surface provided on the vehicle; and a main housing which accommodates the display device and has an opening through which the display light is emitted towards the display surface, wherein The display device comprises a display, which includes a display screen capable of displaying the display light, a backlight comprising an LED substrate with a plurality of LED chips mounted on a substrate, wherein the backlight illuminates the display with emission light, and a device housing that accommodates the backlight therein. the display screen is arranged so that it is tilted with respect to an optical axis of the emitted light, the LED substrate is arranged facing the display screen, and The multitude of LED chips are arranged along an inclination of the display screen in such a way that they are offset stepwise with respect to an optical axis direction along the optical axis. [2] The vehicle display device according to claim 1, wherein the substrate is made of a metal material in a stepped shape along an inclination of the display screen, and Each of the LED chips is arranged on a surface facing the display screen on the substrate, which is formed in a stepped shape. [3] The vehicle display device according to claim 1, wherein the display device comprises a radiation plate made of a metal material and designed in a stepped shape along an inclination of the display screen, and Each of the LED chips, together with the substrate, is arranged on a surface facing the display screen in the emission plate, which is designed in a stepped shape. [4] The vehicle display device according to any one of claims 1 to 3, wherein the display screen is arranged so that it is inclined with respect to an optical axis of the emitted light such that reflected light reflected from the display screen is directed to one side opposite to the side where the aperture is located when external light enters the main housing through the aperture, and an exterior space section is formed on one side opposite to the side of the display screen across the LED substrate in a stepwise manner along an inclination of the display screen, and a section that is arranged on the side of the opening is arranged such that it projects in the direction of the side of the display screen in the optical axis direction with respect to a section that is arranged on one side opposite to the side of the opening.

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