Head-up display device

Abstract

To provide a head-up display device that can be easily assembled.SOLUTION: A head-up display device includes a display device 20 having a light exit surface 20a that emits display light, a concave mirror that reflects the display light, a housing in which the display device 20 and the concave mirror are housed, and a cover 80 having a display cover portion 83 that surrounds the outer periphery of the light exit surface 20a, and first and second blind portions 81, 82 that are formed integrally with the display cover portion 83 and are formed so as to hide at least a portion of the display device 20 from an optical path space through which the display light passes within the housing 30.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a head-up display device. [Background technology]

[0002] The head-up display device described in Patent Document 1 includes a backlight unit that emits illumination light, a display unit that receives the illumination light from the backlight unit and emits display light, and a housing that houses the backlight unit and the display unit. The housing includes a blind cover (inner case) that hides members that cause stray light from the optical path space. The display unit has a liquid crystal panel and a holder cover that surrounds the outer periphery of the liquid crystal panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 045064 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, the blind cover and the holder cover need to be assembled separately, and there is room for improvement in the ease of assembly of the head-up display device.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and has an object to provide a head-up display device that can be easily assembled. [Means for solving the problem]

[0006] In order to achieve the above object, a head-up display device according to the present disclosure includes: a display device having a light exit surface for emitting display light; a mirror that reflects the display light; a housing in which the display device and the mirror are housed; The display device comprises a display cover portion surrounding the outer periphery of the light exit surface, and a cover having a blind portion formed integrally with the display cover portion and formed so as to hide at least a portion of the display device from the optical path space through which the display light passes within the housing. Effect of the Invention

[0007] According to the present disclosure, assembly can be made easier. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of a head-up display device according to an embodiment of the present disclosure. [Diagram 2] 1 is a perspective view of a head-up display device according to an embodiment of the present disclosure. [Diagram 3] FIG. 3 is a diagram in which the upper case of FIG. 2 is omitted. [Figure 4] FIG. 2 is a perspective view of a lower case, a display device, and a cover according to an embodiment of the present disclosure. [Diagram 5] FIG. 2 is a perspective view of a lower case, a display device, and a cover according to an embodiment of the present disclosure. [Figure 6] FIG. 6 is a view of FIG. 5 with the cover removed. [Figure 7] FIG. 2 is an exploded perspective view of a portion of a lower case and a cover according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is a perspective view of a cover according to one embodiment of the present disclosure. [Figure 9] 1 is a perspective view of a locking portion of a cover and a locked protrusion of a lower case according to an embodiment of the present disclosure. FIG. [Figure 10] 4 is a cross-sectional view of a locking portion of the cover and a locked protrusion of the lower case according to an embodiment of the present disclosure. FIG. [Figure 11] FIG. 1 is a perspective view of a display device with a cover attached according to an embodiment of the present disclosure. [Figure 12] FIG. 2 is a perspective view of a cover, a display panel, and the like according to an embodiment of the present disclosure. [Figure 13] FIG. 2 is a perspective view of a cover, a display panel, a light box, etc. according to an embodiment of the present disclosure. [Figure 14] FIG. 1 is a perspective view of a light box according to one embodiment of the present disclosure. [Figure 15] FIG. 1 is a perspective view of a light box according to one embodiment of the present disclosure. [Figure 16] 1 is a partial bottom view of a head-up display device according to an embodiment of the present disclosure, in which a lower case is omitted. FIG. [Figure 17] FIG. 17 is a view of FIG. 16 with the heat sink and screws removed. [Figure 18] FIG. 18 is a view of FIG. 17 with the circuit board removed. [Figure 19] FIG. 19 is a view of FIG. 18 with the lenses removed. [Figure 20] FIG. 1 is a perspective view of three lenses according to one embodiment of the present disclosure. [Figure 21] FIG. 1 is a perspective view of three lenses according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A head-up display device according to an embodiment of the present disclosure will be described with reference to the drawings. In this embodiment, the head-up display device is mounted on a dashboard of an automobile. As shown in FIG. 1, the head-up display device 100 displays a virtual image V by projecting display light L onto a windshield 201, which is an example of a projection target member.

[0010] The head-up display device 100 includes a concave mirror 50, a folding mirror 60, a display device 20, a mirror drive mechanism 70, a cover 80, and a housing 30.

[0011] The display device 20 has a light exit surface 20a that emits display light L. The light exit surface 20a has a rectangular shape and faces upward. A specific configuration of the display device 20 will be described later. In the following description, the longitudinal direction of the light exit surface 20a is the vehicle width direction and is defined as the X direction. The lateral direction of the light exit surface 20a is the vehicle front-rear direction and is defined as the Y direction. The direction perpendicular to the light exit surface 20a is the vehicle height direction and is defined as the Z direction.

[0012] The folding mirror 60 reflects the display light L emitted from the display device 20 toward the concave mirror 50. The folding mirror 60 is located above the display device 20, and the reflective surface of the folding mirror 60 faces toward the front and lower direction of the vehicle. The folding mirror 60 is a plane mirror or a concave mirror. The folding mirror 60 may be omitted.

[0013] The concave mirror 50 reflects the display light L reflected by the folding mirror 60 toward the windshield 201. The reflecting surface of the concave mirror 50 faces toward the rear and upper direction of the vehicle. The display light L reflected by the windshield 201 reaches a viewer (mainly the driver).

[0014] The mirror drive mechanism 70 rotates the concave mirror 50 about a rotation axis AX. The rotation axis AX extends in the X direction. The mirror drive mechanism 70 includes, for example, a motor and a conversion mechanism that converts the rotational force of the motor into linear motion, and transmits the linear motion converted by the conversion mechanism to the concave mirror 50 to rotate the concave mirror 50 about the rotation axis AX.

[0015] 1, the housing 30 is made of light-shielding resin or metal and is hollow, having an optical path space 30A. The optical path space 30A is a space within the housing 30 through which the display light L passes. The housing 30 includes a lower case 31 and an upper case 32 .

[0016] 3 and 4, the lower case 31 is box-shaped and opens upward. The lower case 31 includes a display device accommodating section 31a that accommodates the display device 20, a mirror accommodating section 31b that accommodates the concave mirror 50, and a plurality of locked protrusions 31c, and, as shown in FIG. 7, a bottom wall section 31L, a protrusion surrounding section 31d, and a heat sink exposing recess 31e. The mirror accommodating section 31b is located further forward in the vehicle than the display device accommodating section 31a. The mirror accommodating section 31b and the display device accommodating section 31a are formed as a connected space within the lower case 31.

[0017] The heat sink exposing recess 31e is formed in a side wall 31s farther from the mirror accommodating portion 31b among the side walls of the lower case 31 that surrounds the display device accommodating portion 31a. The heat sink exposing recess 31e is formed in a rectangular recess that is elongated in the X direction and opens upward. 9 and 10, the locked protrusions 31c are portions to which the locking parts 84a of the cover 80, which will be described later, are locked. The multiple (two in this example) locked protrusions 31c are provided on the surface of the bottom wall 31L that separates the display device housing part 31a from the mirror housing part 31b, on the side of the display device housing part 31a. The locked protrusions 31c have an inclined surface that is inclined in the height direction along which the locking parts 84a slide during insertion, and a lower surface that the locking parts 84a contact when locked. The two locked protrusions 31c are provided on both ends of the bottom wall 31L in the lower case 31 in the vehicle width direction. The convex portion surrounding portion 31d is provided on the bottom wall portion 31L so as to surround the locked convex portion 31c so as to form a U-shape when viewed from the Z direction.

[0018] 1, the upper case 32 is formed as a lid that closes the opening of the lower case 31. The upper case 32 includes a window 32a and a mirror housing 32b. The window 32a is made of a light-transmitting material that transmits the display light L reflected by the concave mirror 50. The mirror housing 32b holds the folding mirror 60 within the housing 30.

[0019] As shown in Figures 5, 7 and 8, the cover 80 consists of a single part formed from light-blocking resin or metal, and has the functions of covering the outer periphery of the light exit surface 20a, of covering and concealing the sides of the display device 20 from the optical path space 30A (see Figure 1) to partition the optical path space 30A, and of accommodating the display panel 21 and the relay substrate 24.

[0020] The cover 80 includes a display cover portion 83, a first blind portion 81, a second blind portion 82, and snap-fit ​​locking portions 84a, 84b, and 84c. The display cover portion 83, the first blind portion 81, and the second blind portion 82 are integrally formed from the same material without any seams. The display cover part 83 is disposed on the light exit surface 20a of the display panel 21, and has a frame shape that covers the outer periphery of the light exit surface 20a. The display cover part 83 has a rectangular flat frame shape. The display cover part 83 functions as a partition material that hides the outer periphery of the light exit surface 20a, and the display light L passes through holes in the frame.

[0021] The multiple locking portions 84c are locked to locked protrusions 93c of the light box 90 in order to fix the display cover portion 83 to the light box 90. The two locking portions 84c are located on both sides of the display cover portion 83 in the X direction and form a U-shape extending downward perpendicular to the display cover portion 83. The two locking portions 84c are configured to be elastically deformable in directions away from each other in the X direction.

[0022] The first and second blind portions 81, 82 hide the display device 20 from the optical path space 30A, thereby preventing stray light from being mixed into the display light L, and thus preventing the display quality of the virtual image V from deteriorating. 5 and 6, the first blind portion 81 is disposed on the light exit surface 20a of the display panel 21, closer to the cable 23a. The first blind portion 81 is formed on the same plane as the display cover portion 83. The first blind portion 81 has a rectangular plate shape that is long in the X direction. The length of the first blind portion 81 in the X direction is longer than the length of the display cover portion 83 in the X direction. Both ends of the first blind portion 81 in the X direction are positioned opposite the inner side walls of the upper case 32.

[0023] The multiple locking portions 84b lock onto lockable protrusions 93c (described later) of the light box 90 in order to fix the first blind portion 81 to the light box 90. The two locking portions 84b are located on the lower surface of the first blind portion 81 and form a U-shape extending downward perpendicular to the first blind portion 81. The two locking portions 84b are configured to be elastically deformable in directions away from each other in the X direction.

[0024] 4 and 7, the second blind portion 82 is connected to an end of the first blind portion 81 that is farther from the display cover portion 83 in the Y direction. The second blind portion 82 is inclined with respect to the first blind portion 81, and more specifically, is inclined downward as it moves away from the first blind portion 81 in the Y direction. The second blind portion 82 extends from a position facing the upper surface of the circuit board 41 toward the side surface of the circuit board 41.

[0025] The second blind portion 82 has a rectangular plate shape that is long in the X direction. The length of the second blind portion 82 in the X direction is the same as the length of the first blind portion 81 in the X direction. The second blind portion 82 has side wall portions 82a erected in the Z direction at both ends in the X direction. Each side wall portion 82a is substantially L-shaped or substantially V-shaped when viewed from the Z direction. The lower end of the side wall of the upper case 32 is installed on the upper end of each side wall portion 82a.

[0026] The multiple locking portions 84a lock onto the locked protrusions 31c of the lower case 31 to fix the second blind portion 82 to the lower case 31. The two locking portions 84a are located at both ends in the X direction of the tip side of the second blind portion 82 and form a U-shape extending downward. The two locking portions 84b are provided in a direction perpendicular to the locking portions 84a, 84b and are configured to be elastically deformable in the Y direction. The two locking portions 84b are located below the circuit board 41. The locking portion 84a may be locked to the circuit board 41, not limited to the lower case 31. In this case, the locked protrusion 31c of the lower case 31 is omitted, and the circuit board 41 is provided with a locked protrusion into which the locking portion 84a fits.

[0027] As shown in FIGS. 8 and 12, the cover 80 includes display panel biasing portions 85a, 85b, and 85c functioning as leaf springs, a plurality of display panel positioning portions 85d and 85e, a plurality of contact portions 86a and 86b, and a plurality of L-shaped portions 86L. The display panel biasing portions 85a, 85b, and 85c are provided on the lower surface (the surface on the light box 90 side) of the display cover portion 83, and press the display panel 21 between themselves and the display panel positioning portions 85d and 85e to hold the display panel 21. The display panel biasing portions 85a, 85b are provided on edges of the display cover portion 83 extending in the X direction, and are aligned in the X direction. The display panel biasing portions 85a, 85b are configured to be elastically deformable in the Y direction, and press the side surfaces of the display cover portion 83 toward the multiple display panel positioning portions 85d. The multiple (two in this example) display panel positioning portions 85d are located on the rear surface of the first blind portion 81, and are aligned in the X direction. The display panel positioning portions 85d are located on the opposite side of the display panel 21 in the Y direction from the display panel biasing portions 85a, 85b, and come into contact with the side surfaces of the display panel 21.

[0028] The display panel biasing portion 85c is provided on an edge portion extending in the Y direction of the display cover portion 83. The display panel biasing portion 85c is configured to be elastically deformable in the X direction, and presses a side surface of the display cover portion 83 toward the display panel positioning portion 85e. The display panel biasing portion 85c is located on the rear surface of the first blind portion 81, and is located on the opposite side of the display panel positioning portion 85e in the X direction with the display panel 21 in between, and comes into contact with a side surface of the display panel 21. As described above, the display panel 21 is held in the Y direction by the display panel biasing portions 85a and 85b and the display panel positioning portion 85d, and the display panel 21 is held in the X direction by the display panel biasing portion 85c and the display panel positioning portion 85e.

[0029] The two L-shaped portions 86L are located at both corners in the X direction on the tip side of the second blind portion 82, and form an L-shaped plate extending in the X and Y directions when viewed from the Z direction. The locking portion 84a is located within the L-shaped portion 86L.

[0030] The contact portions 86a and 86b are portions that come into contact with the lower case 31 and are hemispherically convex. The contact portion 86a is located on a rectangular surface that is long in the X direction on the lower end surface of the L-shaped portion 86L. The contact portion 86b is located on a rectangular surface that is long in the Y direction on the lower end surface of the L-shaped portion 86L. The contact portions 86a, 86b come into contact with an upper end surface (see FIG. 10) of the bottom wall portion 31L of the lower case 31. The contact between the contact portions 86a, 86b and the lower case 31 restricts downward movement of the second blind portion 82, and the contact between the locking portion 84a and the locked protruding portion 31c (more precisely, its lower surface) restricts upward movement of the second blind portion 82. This suppresses vibration of the second blind portion 82 in the up-down direction (Z direction).

[0031] Next, the configuration of the display device 20 will be described. 1, the display device 20 includes a display panel 21, an illumination device 40, a circuit board 41, a control element 22, cables 23a and 23b, and a relay board 24. The illumination device 40 includes a plurality of light sources 42, a light box 90, lenses 45, 46, and 47, and a heat sink 48.

[0032] 4, the circuit board 41 is installed on the inner bottom surface of the lower case 31 so as to be aligned along the XY plane. The circuit board 41 is fixed to the inner bottom surface of the lower case 31 by a plurality of (three in this example) board fixing screws 41s. The heads of the board fixing screws 41s are located on the upper surface of the circuit board 41, and the shafts of the board fixing screws 41s pass through holes penetrating the circuit board 41 in the thickness direction and are screwed into screw holes 31h (see FIG. 7) formed in the inner bottom surface of the lower case 31.

[0033] 1 and 5, the circuit board 41 includes a light source board area 41A on which a plurality of light sources 42 are mounted, and a control board area 41B on which a control element 22 consisting of a microcomputer is mounted. The control board area 41B is located closer to the second blind portion 82 of the cover 80 than the light source board area 41A. This makes it possible to increase the optical path distance of the display light L by moving the position of the light source 42 away from the concave mirror 50 in the Y direction, while preventing the head-up display device 100 from becoming large in the Y direction. Since the display position of the virtual image V is determined by this optical path distance, by ensuring a sufficient optical path distance, it is easy to superimpose the virtual image V on the actual scenery.

[0034] A plurality of light sources 42 are mounted on the upper surface of the circuit board 41. A connector 41c and a control element 22 are mounted on the lower surface of the circuit board 41. The connector 41c is connected to the relay board 24 via a cable 23b so as to be able to transmit and receive various signals. The cable 23b is a flexible flat cable. The control element 22 transmits a control signal for controlling the display panel 21 to the display panel 21 via the connector 41c, the cable 23b, the relay board 24, and the cable 23a. In addition, the circuit board 41 is connected to a CAN (Controller Area Network) via a signal line (not shown).

[0035] The light box 90 is made of a single component made of light-shielding resin or metal, and supports the lenses 45, 46, and 47 and the display panel 21. As shown in FIGS. 13 to 15, the light box 90 includes a cylinder portion 91, lens positioning pins 91a and 91b, a display panel installation portion 93, a light path cover support portion 95, and a heat sink fixing screw hole 90h.

[0036] The display panel installation portion 93 has a flat plate shape along the XY plane and faces the display cover portion 83 of the cover 80 with the display panel 21 interposed therebetween. The display panel installation portion 93 has a rectangular light passing hole 93h that is long in the X direction and through which light from the light source 42 passes. As shown in FIG. 15, the display panel mounting portion 93 includes a panel mounting surface 93a on which the display panel 21 is mounted, a plurality of elastic support portions 93b that elastically support the display panel 21, and a plurality of locked protrusions 93c.

[0037] The elastic support portions 93b are provided in pairs on both ends in the X direction of the panel mounting surface 93a, and the two elastic support portions 93b are arranged side by side in the Y direction. The multiple elastic support portions 93b are configured to be elastically deformable in the Z direction, and press the display panel 21 toward the display cover portion 83.

[0038] The multiple locked protrusions 93c have the same shape as the above-mentioned locked protrusions 31c (see FIG. 10), are located on the side surfaces of the display panel installation portion 93, and are each locked with the locking portions 84c of the cover 80. A total of four locked protrusions 93c are provided, two on each side surface of the display panel installation portion 93 extending in the Y direction.

[0039] The tube portion 91 has a cylindrical shape, a rectangular cylindrical shape in this example, surrounding the periphery of the lenses 45, 46, and 47, and is located around a light passing hole 93h on the lower surface of the display panel installation portion 93. The lens positioning pins 91a and 91b are erected on the lower surface of the display panel installation portion 93 inside the tube portion 91. As shown in Fig. 19, the lens positioning pins 91a and 91b are located at both ends in the X direction inside the tube portion 91.

[0040] 13, the light path cover support part 95 has a plate shape that fits along the lower surface of the second blind part 82, and is formed at an angle with respect to the display panel installation part 93. The light path cover support part 95 is formed to be smaller in size than the second blind part 82. The optical path cover support portion 95 includes a plurality of elastic support portions 95b that elastically support the second blind portion 82 via the relay substrate 24. The plurality of elastic support portions 95b are located at both ends of the optical path cover support portion 95 in the X direction. The plurality of elastic support portions 95b are configured to be elastically deformable in the thickness direction of the optical path cover support portion 95, and press the relay substrate 24 toward the second blind portion 82. This suppresses flapping of the second blind portion 82.

[0041] A plurality of (two in this example) heat sink fixing screw holes 90h are located on the outer side of the tube portion 91 in the X direction, and heat sink fixing screws 49 (see FIG. 16) that fix the heat sink 48 to the light box 90 are screwed into the heat sink fixing screw holes 90h.

[0042] 11, the heat sink 48 is formed by bending a metal plate into an L shape. The heat sink 48 includes a first plate portion 48a that is in surface contact with the lower surface of the circuit board 41, and a second plate portion 48b that extends upward and faces the first plate portion 48a in the weight direction. The upper end of the second plate portion 48b is located above the upper surface of the circuit board 41 and is located to the side of the tube portion 91. The first plate portion 48a and the second plate portion 48b are formed to have the same length in the X direction.

[0043] 2, the second plate portion 48b is located in the heat sink exposing recess 31e of the lower case 31 and is exposed to the outside. A gap Sk is formed between the upper end of the second plate portion 48b and the lower end of the upper case 32. Heat collected by the heat sink 48 is likely to be released to the outside through the gap Sk. In addition, a gap Sj is also formed between the lower end of the second plate portion 48b and the bottom surface of the heat sink exposing recess 31e. The first plate portion 48a has screw passing holes 48j through which the shafts of the heat sink fixing screws 49 pass. The heat sink 48 is fixed to the light box 90 by the two heat sink fixing screws 49, with the circuit board 41 sandwiched between them.

[0044] 18, 20 and 21, the lenses 45, 46, 47 are stacked in the thickness direction and housed in the tube portion 91. The lenses 45, 46, 47 adjust the illumination light by transmitting the illumination light from the light source in the thickness direction of each lens. The lenses 45, 46, 47 are arranged in the order of lens 45 → 46 → 47 from the position closest to the light source. The lens 45 is a condenser lens having a function of approximately collimating the illumination light from the light source in the Z direction.

[0045] The lenses 46 and 47 are lenticular lenses. The lens 46 has a function of diverging light in the Y direction to suppress the occurrence of unevenness in the light intensity in the Y direction. The lens 47 has a function of diverging light in the X direction to suppress the occurrence of unevenness in the light intensity in the X direction.

[0046] The lenses 45, 46, and 47 include positioning portions 45a, 46a, 47a, 45b, 46b, and 47b, respectively. The positioning portions 45a, 46a, and 47a and 45b, 46b, and 47b are located at both ends of the lenses 45, 46, and 47 in the X direction and at the center in the Y direction. The positioning portions 45a, 46a, and 47a overlap each other in the Z direction, and in this overlapping state, a recess is formed that communicates in the Z direction and opens outward in the X direction. A lens positioning pin 91a fits into this recess. The positioning portions 45b, 46b, and 47b overlap each other in the Z direction, and in this overlapping state, a through hole communicating in the Z direction is formed. A lens positioning pin 91b fits into this through hole. As described above, the lenses 45, 46, and 47 are positioned within the cylindrical portion 91 by fitting the positioning portions 45a, 46a, 47a, 45b, 46b, and 47b into the lens positioning pins 91a and 91b.

[0047] The lens 45 includes a plurality of positioning pins 45p (two in this example). The two positioning pins 45p are located at both ends of the lens 45 in the X direction and are cylindrical extending downward. Each positioning pin 45p passes through each through hole 41h (see FIG. 17) formed in the circuit board 41 and each through hole 48h (see FIG. 16) formed in the heat sink 48, and fits into a receiving hole 31j (see FIG. 7) in the lower case 31. Thus, the positional relationship between the lens 45, the circuit board 41, and the heat sink 48 is determined by the positioning pin 45p. With this positional relationship determined, as described above, the heat sink 48 is fixed to the light box 90 by the two heat sink fixing screws 49, sandwiching the circuit board 41. Thus, the display device 20 is integrated.

[0048] Next, a method of assembling the head-up display device 100 will be described. First, as shown in FIG. 12, the display panel 21 is placed on the underside of the display cover portion 83 of the cover 80, and the relay board 24 connected to the display panel 21 via the cable 23a is placed on the underside of the second blind portion .

[0049] 13, the light box 90 is attached to the cover 80. At this time, the multiple locking portions 84b, 84c are locked to the locked protrusions 93c. Next, the lenses 45, 46, and 47 are inserted into the cylindrical portion 91 of the light box 90. Thereafter, the positioning pins 45p of the lens 45 are inserted into the through holes 41h of the circuit board 41 and the through holes 48h of the heat sink 48 in order. Then, the two heat sink fixing screws 49 are screwed into the heat sink fixing screw holes 90h of the light box 90, thereby fixing the circuit board 41 and the heat sink 48 to the light box 90. Through the above steps, an intermediate assembly consisting of the display device 20 and the cover 80 is completed. This intermediate assembly is fixed to the inner bottom surface of the lower case 31 via the circuit board 41 by three board fixing screws 41s. Then, after the concave mirror 50, the mirror driving mechanism 70, etc. are attached inside the lower case 31, the upper case 32 with the folding mirror 60 housed therein is attached to the lower case 31. With the above, the assembly of the head-up display device 100 is completed.

[0050] (effect) According to the embodiment described above, the following effects are achieved. (1) The head-up display device 100 includes a display device 20 having a light exit surface 20a that emits display light L, a concave mirror 50 which is an example of a mirror that reflects the display light L, a housing 30 in which the display device 20 and the concave mirror 50 are housed, and a cover 80 having a display cover portion 83 that surrounds the outer periphery of the light exit surface 20a, and first and second blind portions 81, 82 that are formed integrally with the display cover portion 83 and are formed so as to hide at least a portion of the display device 20 from an optical path space 30A through which the display light L passes within the housing 30 as a countermeasure against stray light. According to this configuration, since the display cover part 83 and the first and second blind parts 81, 82 are integrally formed, it is not necessary to separately assemble the display cover part 83 and the first and second blind parts 81, 82. Therefore, the head-up display device 100 can be easily assembled. Moreover, the cover 80 is configured so as to be attachable to the display device 20. The display device 20 with the cover 80 attached is housed in the lower case 31 of the housing 30. With this configuration, the display device 20 can be assembled into the housing 30 from one direction, and there is no need to assemble the blind cover and the holder cover from different directions as in the configuration described in Patent Document 1. This makes it easier to assemble the head-up display device 100.

[0051] (2) The display device 20 includes a plurality of light sources 42, a display panel 21 having a light emission surface 20a and receiving illumination light from the plurality of light sources 42 and emitting display light L, a control element 22 that controls the display panel 21, and a circuit board 41 on which the plurality of light sources 42 and the control element 22 are mounted. According to this configuration, only one circuit board 41 is required, which facilitates assembly of the head-up display device 100. In addition, the head-up display device 100 can be easily configured to be compact.

[0052] (3) The circuit board 41 includes a light source board region 41A on which the multiple light sources 42 are mounted, and a control board region 41B on which the control element 22 is mounted. The control board region 41B is provided at a position closer to the second blind section 82 than the light source board region 41A. According to this configuration, by moving the position of the light source 42 away from the concave mirror 50, the optical path distance of the display light L can be increased, and it is easy to superimpose the virtual image V on the actual scenery. In addition, the control board area 41B prevents the head-up display device 100 from becoming large.

[0053] (4) The cover 80 is located at the tip of the second blind portion 82 far from the display cover portion 83 and has a locking portion 84a that locks onto the locked protrusion 31c, which is an example of a locked portion, located inside the housing 30. According to this configuration, flapping of the second blind portion 82 can be suppressed, and also, the generation of abnormal noises associated with the flapping can be suppressed.

[0054] (5) The display device 20 includes a light box 90 having a cylindrical tube portion 91 surrounding the multiple light sources 42, and an optical path cover support portion 95 which is an example of a support portion that is integrally formed with the tube portion 91 and indirectly supports the second blind portion 82 from the opposite side of the optical path space 30A via the relay substrate 24. According to this configuration, flapping of the second blind portion 82 can be suppressed, and also, the generation of abnormal noises associated with the flapping can be suppressed.

[0055] (6) The display device 20 includes a heat sink 48 having a first plate portion 48a that is in surface contact with the circuit board 41, and a second plate portion 48b that is bent upwardly relative to the first plate portion 48a in the weight direction. According to this configuration, the heat collected by the first plate portion 48a is easily dissipated upward along the second plate portion 48b.

[0056] (7) The head-up display device 100 includes a folding mirror 60, which is an example of a first mirror that reflects the display light L from the display device 20, and a concave mirror 50, which is an example of a second mirror that reflects the display light L from the folding mirror 60. The second blind portion 82 is inclined with respect to the display cover portion 83, and is formed so as to extend along the display light L traveling from the folding mirror 60 toward the concave mirror 50. According to this configuration, the head-up display device 100 can be configured compactly.

[0057] The present disclosure is not limited to the above-described embodiments and drawings. Modifications (including deletion of components) can be made as appropriate within the scope of the present disclosure. An example of a modification will be described below.

[0058] (Modification) In the above embodiment, either the first blind portion 81 or the second blind portion 82 may be omitted from the cover 80. In the above embodiment, the positions, number and shapes of the locking portions 84a, 84b, 84c and the locked protrusions 31c, 93c can be changed as appropriate. For example, the locking portions 84a, 84b, 84c may be claw portions, and the locked protrusions 31c, 93c may be replaced with recesses into which the tips of the claw portions fit. Also, for example, the locking portion 84a and the locked protrusions 31c may be omitted.

[0059] In the above embodiment, elements mounted on either relay board 24 or circuit board 41 may be mounted on the other, and elements mounted on the other may be mounted on either one. In the above embodiment, the relay board 24 may be omitted. In this case, the light path cover support portion 95 may directly support the second blind portion 82. Also, in the above embodiment, the light path cover support portion 95 of the light box 90 may be omitted. In the above embodiment, the heat sink 48 is not limited to an L-shape, and may be fin-shaped. In the above embodiment, the control board region 41B was located closer to the second blind section 82 than the light source board region 41A, but this is not limited to the above and the control board region 41B may be located farther from the second blind section 82 than the light source board region 41A. In the above embodiment, the circuit board 41 may be configured such that the light source board area 41A and the control board area 41B are separate boards. In the above embodiment, the mirror driving mechanism 70 may be omitted.

[0060] In the above embodiment, the display device 20 is not limited to a configuration including a liquid crystal display panel, and may be a configuration including an organic EL (Electro Luminescence), a DMD (Digital Micro mirror Device), or a MEMS (Micro Electro Mechanical Systems) mirror. In the above embodiment, the head-up display device 100 is mounted on a vehicle, but the present invention is not limited to this and may be mounted on a vehicle such as an airplane, a ship, etc. In addition, the projection member is not limited to the windshield 201 and may be a dedicated combiner. [Explanation of symbols]

[0061] 20 Display device 20a Light exit surface 21 Display Panel 22 Control element 23a, 23b Cable 24 Relay board 30 Case 30A optical path space 31 Lower case 31L bottom wall 31a Display device housing 31b, 32b Mirror housing 31c, 93c Locked convex part 31d Convex enclosure 31e Heat sink exposed recess 31h Screw hole 31j Receiving hole 31s side wall 32 Upper case 32a Window section 40 Lighting Equipment 41 Circuit Board 41A Light source board area 41B Control board area 41c Connector 41h,48h through hole 41s Board fixing screw 42 Light source 45,46,47 Lenses 45a, 45b, 46a, 46b, 47a, 47b Positioning parts 45p Locating pin 48 Heatsink 48a 1st plate part 48b 2nd plate part 48j Screw Through Hole 49 Heat sink fixing screw 50 Concave Mirror 60 Folding Mirror 70 Mirror drive mechanism 80 Cover 81 First Blind Section 82 2nd Blind Section 82a Side wall part 83 Display cover 84a, 84b, 84c Locking part 85a, 85b, 85c Display panel energizing portion 85d, 85e Display panel positioning section 86L L-shaped part 86a,86b Contact part 90 Lightbox 90h Heat sink fixing screw hole 91 Cylinder part 91a, 91b Lens positioning pin 93 Display panel installation section 93a Panel installation surface 93b, 95b Elastic support part 93h Light passing hole 95 Optical path cover support 100 Head-up display device 201 Windshield L display light V Virtual Image AX Rotation Axis Sk, Sj Gap

Claims

1. a display device having a light exit surface for emitting display light; a mirror that reflects the display light; a housing in which the display device and the mirror are housed; A display cover portion that surrounds the outer periphery of the light exit surface, and a cover having a blind portion that is integrally formed with the display cover portion and is formed so as to hide at least a part of the display device from an optical path space through which the display light passes within the housing. Head-up display device.

2. The display device includes: A plurality of light sources; a display panel having the light exit surface, receiving illumination light from the plurality of light sources and emitting the display light; A control element for controlling the display panel; and a circuit board on which the light sources and the control element are mounted. The head-up display device according to claim 1 .

3. The circuit board includes: a light source substrate region on which the plurality of light sources are mounted; a control board region on which the control element is mounted; The control board region is provided at a position closer to the blind section than the light source board region. The head-up display device according to claim 2 .

4. The cover is located at a tip end of the blind section far from the display cover section and has a locking section that locks onto a locking section located inside the housing. The head-up display device according to claim 1 .

5. The display device includes a light box having a cylindrical tube portion surrounding the plurality of light sources and a support portion integrally formed with the tube portion and supporting the blind portion directly or indirectly from the opposite side of the optical path space. The head-up display device according to claim 2 .

6. The display device includes a heat sink having a first plate portion that is in surface contact with the circuit board, and a second plate portion that is bent in a direction opposite to a weight direction relative to the first plate portion. The head-up display device according to claim 2 .

7. The head-up display device includes: a first mirror that serves as the mirror and reflects the display light from the display device; a second mirror that reflects the display light from the first mirror as the mirror other than the first mirror, The blind portion is inclined with respect to the display cover portion and is formed to extend along the display light traveling from the first mirror to the second mirror. The head-up display device according to any one of claims 1 to 6.

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