Head-up display

Abstract

The utility model provides a head-up display device. The head-up display device comprises: a display device (20) having a light emitting surface (20a) for emitting display light; a concave mirror for reflecting the display light; a housing for accommodating the display device (20) and the concave mirror; and a cover (80) having a display cover portion (83) surrounding the outer periphery of the light emitting surface (20a), and a first shielding portion (81) and a second shielding portion (82) formed integrally with the display cover portion (83) and formed to shield at least a portion of the display device (20) from an optical path space for the display light to pass through in the housing (30). According to the head-up display device of the utility model, it can be easily assembled.

Description

Technical Field

[0001] The utility model relates to a head-up display device. Background Art

[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 accommodates the backlight unit and the display unit. The housing includes a light shielding cover (intermediate housing) that shields components that cause stray light from the optical path space. The display unit has a liquid crystal panel and a retaining frame cover that surrounds the outer periphery of the liquid crystal panel.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2022 / 045064 Utility Model Content

[0006] Issues to be Solved by Utility Models

[0007] In the structure described in Patent Document 1, the shading cover and the holder cover need to be assembled separately, and there is room for improvement in the assemblability of the head-up display device.

[0008] The utility model is completed in view of the above actual situation, and its purpose is to provide a head-up display device that can be easily assembled.

[0009] Means for solving problems

[0010] In order to achieve the above-mentioned object, the head-up display device of the utility model has:

[0011] A display device having a light emitting surface for emitting display light;

[0012] a reflector that reflects the display light;

[0013] a housing that accommodates the display device and the reflector; and

[0014] A cover includes a display cover portion surrounding the outer periphery of the light emitting surface, and a shielding portion formed integrally with the display cover portion and formed to shield at least a portion of the display device from an optical path space in the housing through which the display light passes.

[0015] Utility Model Effect

[0016] According to the utility model, assembly can be easily performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of a head-up display device according to one embodiment of the present invention.

[0018] Figure 2 It is a perspective view of a head-up display device according to one embodiment of the present invention.

[0019] Figure 3 It is omitted Figure 2 Figure 1. Upper case of the vehicle.

[0020] Figure 4 It is a perspective view of a lower housing, a display device, and a cover according to an embodiment of the present invention.

[0021] Figure 5 It is a perspective view of a lower housing, a display device, and a cover according to an embodiment of the present invention.

[0022] Figure 6 yes Figure 5 Figure 2 shows the hood being removed.

[0023] Figure 7 This is an exploded perspective view of a part of the lower case and the cover according to one embodiment of the present invention.

[0024] Figure 8 This is a perspective view of a cover according to one embodiment of the present invention.

[0025] Fig. 9 It is a perspective view of the locking portion of the cover and the locked convex portion of the lower case according to one embodiment of the present invention.

[0026] Fig.10 It is a cross-sectional view of the locking portion of the cover and the locked convex portion of the lower case according to one embodiment of the present invention.

[0027] Fig.11 This is a perspective view of a display device with a cover attached according to one embodiment of the present invention.

[0028] Fig.12 It is a perspective view of a cover, a display panel, etc. according to one embodiment of the present invention.

[0029] Fig.13 It is a perspective view of a cover, a display panel, a light box, etc. according to one embodiment of the present invention.

[0030] Fig.14 It is a three-dimensional view of a light box according to one embodiment of the present invention.

[0031] Fig.15 It is a three-dimensional view of a light box according to one embodiment of the present invention.

[0032] Fig.16It is a partial bottom view of a head-up display device with a lower housing omitted according to an embodiment of the present invention.

[0033] Fig.17 yes Fig.16 Figure 1. Heat sink with screws removed.

[0034] Fig.18 yes Fig.17 Figure 1 shows the circuit board being removed.

[0035] Fig.19 yes Fig.18 Figure 2 shows a diagram of each lens being removed.

[0036] Fig. 20 It is a stereoscopic diagram of three lenses according to one embodiment of the present invention.

[0037] Fig.21 It is a stereoscopic diagram of three lenses according to one embodiment of the present invention. DETAILED DESCRIPTION

[0038] A head-up display device according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, the head-up display device is mounted on a dashboard of a car.

[0039] like Figure 1 As shown, the head-up display device 100 displays a virtual image V by projecting display light L onto a windshield 201 as an example of a projection target member.

[0040] The head-up display device 100 includes a concave mirror 50 , a folding mirror 60 , a display device 20 , a mirror driving mechanism 70 , a cover 80 , and a housing 30 .

[0041] The display device 20 has a light emitting surface 20a for emitting display light L. The light emitting surface 20a is rectangular and faces upward. The specific structure of the display device 20 will be described later.

[0042] In the following description, the long side direction of the light exit surface 20a is the vehicle width direction, which is defined as the X direction. The short side direction of the light exit surface 20a is the front-rear direction of the vehicle, which is defined as the Y direction. The direction perpendicular to the light exit surface 20a is the height direction of the vehicle, which is defined as the Z direction.

[0043] 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 reflection surface of the folding mirror 60 faces the front and lower direction of the vehicle. The folding mirror 60 is a plane mirror or a concave mirror.

[0044] In addition, the folding mirror 60 may be omitted.

[0045] 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 the upper rear direction of the vehicle. The display light L reflected by the windshield 201 reaches the viewer (mainly the driver).

[0046] The reflector drive mechanism 70 rotates the concave mirror 50 around the rotation axis AX. The rotation axis AX extends in the X direction. The reflector drive mechanism 70 includes, for example, a motor and a conversion mechanism that converts the rotational force of the motor into a linear motion, and transmits the linear motion converted by the conversion mechanism to the concave mirror 50, thereby rotating the concave mirror 50 around the rotation axis AX.

[0047] like Figure 1 As shown, the housing 30 is formed of a light-shielding resin or metal in a hollow shape having an optical path space 30A. The optical path space 30A is a space in the housing 30 through which the display light L passes.

[0048] The housing 30 includes a lower case 31 and an upper case 32 .

[0049] like Figure 3 and Figure 4 As shown in FIG. 1 , the lower case 31 is in the shape of a box that opens upward. The lower case 31 includes a display device storage portion 31a for storing the display device 20, a reflector storage portion 31b for storing the concave mirror 50, a plurality of latched convex portions 31c, and a plurality of Figure 7 The bottom wall portion 31L, the convex portion surrounding portion 31d and the heat sink exposure recess 31e are shown. The reflector storage portion 31b is located further forward of the vehicle than the display device storage portion 31a. The reflector storage portion 31b and the display device storage portion 31a are formed as a space connected in the lower case 31.

[0050] The heat sink exposure recess 31e is formed on the side wall 31s away from the mirror housing 31b among the side walls of the lower case 31 surrounding the display housing 31a. The heat sink exposure recess 31e is formed in a rectangular recess shape that is open upward and is long in the X direction.

[0051] like Fig. 9 and 10 As shown, the latched protrusion 31c is a portion where the latching portion 84a described later of the cover 80 is latched. A plurality of (two in this example) latched protrusions 31c are provided on the surface of the bottom wall portion 31L on the side of the display device storage portion 31a, and the bottom wall portion 31L divides the display device storage portion 31a and the reflector storage portion 31b. The latched protrusion 31c has an inclined surface inclined in the height direction that slides in the middle of the insertion of the latching portion 84a, and a lower surface that contacts when the latching portion 84a is latched. The two latched protrusions 31c are provided at both ends of the bottom wall portion 31L in the vehicle width direction in the lower housing 31.

[0052] The convex portion surrounding portion 31 d is provided on the bottom wall portion 31L so as to surround the locked convex portion 31 c in a U-shape when viewed from the Z direction.

[0053] like Figure 1 As shown, the upper case 32 is formed as a cover portion that closes the opening of the lower case 31. The upper case 32 includes a window portion 32a and a reflector storage portion 32b. The window portion 32a is composed of a light-transmitting member that transmits the display light L reflected by the concave mirror 50. The reflector storage portion 32b holds the folding mirror 60 in the housing 30.

[0054] like Figure 5 , Figure 7 and Figure 8 As shown, the cover 80 is composed of a member formed of a light-shielding resin or metal, and has the function of covering the outer periphery of the light emitting surface 20a, and blocking the light path space 30A (see Figure 1 ) has the function of covering the side of the display device 20 and dividing the optical path space 30A, and the function of accommodating the display panel 21 and the relay substrate 24.

[0055] The cover 80 includes a display cover portion 83, a first shielding portion 81, a second shielding portion 82, and locking portions 84a, 84b, 84c as buckles. The display cover portion 83, the first shielding portion 81, and the second shielding portion 82 are seamlessly integrally formed of the same material.

[0056] The display cover 83 is provided on the light exit surface 20a of the display panel 21 and is in the shape of a frame covering the outer periphery of the light exit surface 20a. The display cover 83 is in the shape of a rectangular flat plate frame. The display cover 83 functions as a spacer that shields the outer periphery of the light exit surface 20a, and the display light L passes through the hole in the frame.

[0057] In order to fix the display cover 83 to the light box 90, a plurality of locking portions 84c are locked to the locked protrusion 93c of the light box 90. The two locking portions 84c are located on both sides of the display cover 83 in the X direction and are in a U shape extending in the downward direction perpendicular to the display cover 83. The two locking portions 84c are configured to be elastically deformable in a direction away from each other in the X direction.

[0058] The first shielding portion 81 and the second shielding portion 82 shield the display device 20 from the optical path space 30A, thereby suppressing the mixing of stray light into the display light L, and further suppressing the reduction in the display quality of the virtual image V.

[0059] like Figure 5 and Figure 6As shown, the first shielding portion 81 is disposed in a position close to the cable 23a in the light emitting surface 20a of the display panel 21. The first shielding portion 81 and the display cover portion 83 are formed on the same plane. The first shielding portion 81 is in the shape of a rectangular plate that is longer in the X direction. The length of the first shielding portion 81 in the X direction is formed to be longer than the length of the display cover portion 83 in the X direction. Both ends of the first shielding portion 81 in the X direction are located at positions opposite to the inner side wall of the upper housing 32.

[0060] In order to fix the first shielding portion 81 to the light box 90, a plurality of locking portions 84b are locked to a later-described locked protrusion 93c of the light box 90. The two locking portions 84b are located on the lower surface of the first shielding portion 81 and are in a U-shape extending in a downward direction perpendicular to the first shielding portion 81. The two locking portions 84b are configured to be elastically deformable in a direction away from each other in the X direction.

[0061] like Figure 4 and Figure 7 As shown, the second shielding portion 82 is connected to the end of the first shielding portion 81 away from the display cover portion 83 in the Y direction. The second shielding portion 82 is inclined relative to the first shielding portion 81, and more specifically, is inclined downward as it moves away from the first shielding portion 81 in the Y direction. The second shielding portion 82 extends from a position opposite to the upper surface of the circuit substrate 41 to the side surface of the circuit substrate 41.

[0062] The second shielding portion 82 is in the shape of a rectangular plate that is long in the X direction. The length of the second shielding portion 82 in the X direction is the same as the length of the first shielding portion 81 in the X direction.

[0063] The second shielding 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 V-shaped when viewed from the Z direction. The lower end of the side wall of the upper housing 32 is provided at the upper end of each side wall portion 82a.

[0064] In order to fix the second shielding portion 82 on the lower housing 31, a plurality of locking portions 84a are locked to the locked protrusion 31c of the lower housing 31. The two locking portions 84a are located at both ends of the front end side of the second shielding portion 82 in the X direction, and are in a U-shape extending downward. The two locking portions 84a are arranged in a direction orthogonal to the locking portions 84b and 84c, and are configured to be elastically deformable in the Y direction. The two locking portions 84a are located at a position lower than the circuit substrate 41.

[0065] The locking portion 84a is not limited to the lower case 31, but may be locked to the circuit board 41. In this case, the locked protrusion 31c of the lower case 31 is omitted, and a locked protrusion into which the locking portion 84a fits is formed on the circuit board 41.

[0066] like Figure 8and Fig.12 As shown, the cover 80 includes display panel urging 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.

[0067] The display panel biasing portions 85 a , 85 b , and 85 c are provided on the lower surface (the surface on the lamp box 90 side) of the display cover portion 83 , and press the display panel 21 between the display panel positioning portions 85 d and 85 e to hold the display panel 21 .

[0068] The display panel force applying parts 85a and 85b are provided at the edge of the display cover part 83 extending in the X direction and are arranged in the X direction. The display panel force applying parts 85a and 85b are configured to be elastically deformable in the Y direction, and press the side of the display cover part 83 toward the plurality of display panel positioning parts 85d. The plurality of (two in this example) display panel positioning parts 85d are located on the back side of the first shielding part 81 and are arranged in the X direction. The display panel positioning part 85d is located on the opposite side of the display panel force applying parts 85a and 85b with the display panel 21 sandwiched in the Y direction, and contacts the side of the display panel 21.

[0069] The display panel force applying portion 85c is provided at the edge portion of the display cover portion 83 extending in the Y direction. The display panel force applying portion 85c is configured to be elastically deformable in the X direction, and presses the side surface of the display cover portion 83 toward the display panel positioning portion 85e. The display panel force applying portion 85c is located on the back surface of the first shielding portion 81, and is located on the opposite side of the display panel positioning portion 85e with the display panel 21 sandwiched in the X direction, and contacts the side surface of the display panel 21.

[0070] As described above, the display panel 21 is held in the Y direction by the display panel urging portions 85 a and 85 b and the display panel positioning portion 85 d , and is held in the X direction by the display panel urging portion 85 c and the display panel positioning portion 85 e .

[0071] The two L-shaped portions 86L are located at two corners in the X direction at the front end side of the second shielding portion 82 and are L-shaped plates extending in the X and Y directions when viewed from the Z direction. The locking portion 84a is located inside the L-shaped portion 86L.

[0072] The contact portions 86a and 86b are portions that contact the lower housing 31 and are hemispherical convex. The contact portion 86a is located on a rectangular surface that is longer in the X direction at the lower end surface of the L-shaped portion 86L. The contact portion 86b is located on a rectangular surface that is longer in the Y direction at the lower end surface of the L-shaped portion 86L.

[0073] The contact portions 86a, 86b are in contact with the upper end surface of the bottom wall portion 31L of the lower case 31 (see Fig.10The second shielding portion 82 is restricted from moving downward by the contact between the contact portions 86a and 86b and the lower housing 31, and the second shielding portion 82 is restricted from moving upward by the contact between the locking portion 84a and the locked protrusion 31c (more precisely, its lower surface). Thus, the vibration of the second shielding portion 82 in the up-down direction (Z direction) is suppressed.

[0074] Next, the structure of the display device 20 will be described.

[0075] like Figure 1 As shown, the display device 20 includes a display panel 21, a lighting device 40, a circuit board 41, a control element 22, cables 23a, 23b, and a relay board 24. The lighting device 40 includes a plurality of light sources 42, a lamp box 90, lenses 45, 46, 47, and a heat sink 48.

[0076] like Figure 4 As shown in FIG. 1 , the circuit substrate 41 is arranged on the inner bottom surface of the lower housing 31 along the XY plane. The circuit substrate 41 is fixed to the inner bottom surface of the lower housing 31 by a plurality of (three in this example) substrate fixing screws 41s. The head of the substrate fixing screw 41s is located on the upper surface of the circuit substrate 41, and the shaft of the substrate fixing screw 41s passes through a hole that passes through the thickness direction of the circuit substrate 41 and is screwed to a threaded hole 31h (see FIG. 1 ) formed on the inner bottom surface of the lower housing 31. Figure 7 ) screw together.

[0077] like Figure 1 and Figure 5 As shown, the circuit board 41 includes: a light source board area 41A, which is mounted with a plurality of light sources 42; and a control board area 41B, which is mounted with a control element 22 composed of a microcomputer. The control board area 41B is located closer to the second shielding portion 82 of the cover 80 than the light source board area 41A. As a result, the position of the light source 42 is moved away from the concave mirror 50 in the Y direction, the optical path distance of the display light L is increased, and the size of the head-up display device 100 in the Y direction is suppressed. Since the display position of the virtual image V is determined by the optical path distance, by sufficiently obtaining the optical path distance, it is easy to overlap the virtual image V with the actual scenery.

[0078] A plurality of light sources 42 are mounted on the upper surface of the circuit substrate 41. A connector 41c and a control element 22 are mounted on the lower surface of the circuit substrate 41. The connector 41c is connected to the relay substrate 24 via a cable 23b in a manner capable of transmitting and receiving various signals. The cable 23b is a flexible flat cable. The control element 22 sends a control signal for controlling the display panel 21 to the display panel 21 via the connector 41c, the cable 23b, the relay substrate 24, and the cable 23a. In addition, the circuit substrate 41 is connected to a CAN (Controller Area Network) via a signal line not shown.

[0079] The light box 90 is composed of a single member formed of light-shielding resin or metal, and supports the lenses 45 , 46 , 47 and the display panel 21 .

[0080] like Figures 13 to 15 As shown, the lamp box 90 includes a cylindrical portion 91, lens positioning pins 91a, 91b, a display panel installation portion 93, an optical path cover support portion 95, and a heat sink fixing threaded hole 90h.

[0081] The display panel installation part 93 is in a flat plate shape along the XY plane and faces the display cover part 83 of the cover 80 via the display panel 21. The display panel installation part 93 has a rectangular light passage hole 93h that is long in the X direction and through which light from the light source 42 passes.

[0082] like Fig.15 As shown, the display panel installation portion 93 includes: a panel installation surface 93a on which the display panel 21 is installed; a plurality of elastic support portions 93b that elastically support the display panel 21; and a plurality of locked protrusions 93c.

[0083] Two elastic support parts 93b are provided on both ends of the panel installation surface 93a in the X direction, and the two elastic support parts 93b are arranged in the Y direction. The plurality of elastic support parts 93b are configured to be elastically deformable in the Z direction and press the display panel 21 toward the display cover 83 .

[0084] The plurality of locked protrusions 93c and the locked protrusions 31c (see Fig.10 ) are of the same shape and are located on the side of the display panel setting portion 93, and are respectively locked by the locking portion 84c of the cover 80. The locked protrusions 93c are provided with two each on the two side surfaces extending along the Y direction of the display panel setting portion 93, and a total of four are provided.

[0085] The barrel 91 is in the shape of a barrel surrounding the lenses 45, 46, 47. In this example, it is in the shape of a rectangular barrel and is located around the light passage hole 93h on the lower surface of the display panel setting portion 93. Lens positioning pins 91a and 91b are vertically provided on the lower surface of the display panel setting portion 93 in the barrel 91. Fig.19 As shown, the lens positioning pins 91 a and 91 b are located at both ends in the X direction inside the cylinder 91 .

[0086] like Fig.13 As shown, the light path cover support part 95 is in a plate shape along the lower surface of the second shielding part 82 and is formed to be inclined relative to the display panel installation part 93. The light path cover support part 95 is formed to be smaller than the second shielding part 82.

[0087] The optical path cover support portion 95 includes a plurality of elastic support portions 95b that elastically support the second shielding 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 to press the relay substrate 24 toward the second shielding portion 82. Thus, the shaking of the second shielding portion 82 is suppressed.

[0088] A plurality of (two in this example) heat sink fixing threaded holes 90h are located outside the cylinder 91 in the X direction, and are provided for heat sink fixing screws 49 (see FIG. 4 ) for fixing the heat sink 48 to the lamp box 90. Fig.16 ) screw together.

[0089] like Fig.11 As shown in FIG. 1 , 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 in surface contact with the lower surface of the circuit substrate 41, and a second plate portion 48b extending in an upward direction opposite to the weight direction relative to the first plate portion 48a. The upper end of the second plate portion 48b is located above the upper surface of the circuit substrate 41 and is located on the side of the cylinder portion 91. The first plate portion 48a and the second plate portion 48b are formed to have the same length in the X direction.

[0090] like Figure 2 As shown, the second plate portion 48b is located in the heat sink exposure recess 31e of the lower housing 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 housing 32. The heat recovered by the heat sink 48 is easily 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 exposure recess 31e.

[0091] The first plate portion 48a is provided with screw through holes 48j through which the shafts of the heat sink fixing screws 49 are inserted. The heat sink 48 is fixed to the lamp housing 90 by two heat sink fixing screws 49 with the circuit board 41 interposed therebetween.

[0092] like Fig.18 , Fig. 20 and Fig.21 As shown in FIG. 1 , lenses 45, 46, and 47 are stacked in the thickness direction and accommodated in the cylinder 91. The lenses 45, 46, and 47 adjust the illumination light by transmitting the illumination light from the light source in the respective thickness directions. The lenses 45, 46, and 47 are arranged in the order of lens 45 → 46 → 47 from the position close to the light source. The lens 45 is a focusing lens having the function of making the illumination light from the light source substantially parallel to the Z direction.

[0093] Lenses 46 and 47 are biconvex lenses. Lens 46 has a function of diverging light in the Y direction to suppress uneven light intensity in the Y direction. Lens 47 has a function of diverging light in the X direction to suppress uneven light intensity in the X direction.

[0094] The lenses 45, 46, 47 are provided with positioning parts 45a, 46a, 47a, 45b, 46b, 47b, respectively. The positioning parts 45a, 46a, 47a and the positioning parts 45b, 46b, 47b are located at both ends of the lenses 45, 46, 47 in the X direction and at the center in the Y direction. The positioning parts 45a, 46a, 47a overlap each other in the Z direction, and in this overlapping state, a concave part is formed which is connected in the Z direction and opens to the outside in the X direction. The lens positioning pin 91a is embedded in the concave part.

[0095] The positioning parts 45b, 46b, and 47b overlap each other in the Z direction, and in the overlapped state, a through hole is formed which communicates in the Z direction. The lens positioning pin 91b is fitted into the through hole.

[0096] As described above, the lenses 45 , 46 , 47 are positioned in the tube 91 by the engagement of the positioning portions 45 a , 46 a , 47 a , 45 b , 46 b , 47 b with the lens positioning pins 91 a , 91 b .

[0097] The lens 45 has a plurality of (two in this example) positioning pins 45p. The two positioning pins 45p are located at both ends of the lens 45 in the X direction and are cylindrically shaped and extend downward. Each positioning pin 45p is inserted through each through hole 41h (see Fig.17 ) and each through hole 48h formed in the heat sink 48 (refer to Fig.16 ) and is inserted into the receiving hole 31j in the lower housing 31 (refer to Figure 7). Therefore, the positional relationship among the lens 45, the circuit substrate 41, and the heat sink 48 is determined by the positioning pin 45p. In the state where the positional relationship is determined, as described above, the heat sink 48 is fixed to the light box 90 by sandwiching the circuit substrate 41 by two heat sink fixing screws 49. Therefore, the display device 20 is in an integrated state.

[0098] Next, a method of assembling the head-up display device 100 will be described.

[0099] First, if Fig.12 As shown, the display panel 21 is disposed on the lower surface of the display cover portion 83 of the cover 80 , and the relay substrate 24 connected to the display panel 21 via the cable 23 a is disposed on the lower surface of the second shielding portion 82 .

[0100] Then, if Fig.13 As shown, the lamp box 90 is mounted on the cover 80. At this time, the plurality of locking portions 84b and 84c are locked to the locked protrusion 93c.

[0101] Next, the lenses 45, 46, and 47 are inserted into the cylindrical portion 91 of the lamp housing 90. After that, the through holes 41h of the circuit board 41 and the through holes 48h of the heat sink 48 are sequentially inserted into the positioning pins 45p of the lens 45.

[0102] Then, the circuit board 41 and the heat sink 48 are fixed to the light box 90 by screwing the two heat sink fixing screws 49 into the heat sink fixing threaded holes 90h of the light box 90. The intermediate assembly consisting of the display device 20 and the cover 80 is completed through the operations so far. The intermediate assembly is fixed to the inner bottom surface of the lower housing 31 via the circuit board 41 by three substrate fixing screws 41s. After the concave mirror 50 and the reflector drive mechanism 70 are installed in the lower housing 31, the upper housing 32 in which the folding mirror 60 is stored is installed on the lower housing 31.

[0103] As described above, the assembly of the head-up display device 100 is completed.

[0104] (Effect)

[0105] According to the embodiment described above, the following effects are obtained.

[0106] (1) The head-up display device 100 includes: a display device 20 having a light emitting surface 20a for emitting display light L; a concave mirror 50 as an example of a reflector for reflecting the display light L; a housing 30 for accommodating the display device 20 and the concave mirror 50; and a cover 80 having a display cover portion 83 surrounding the outer periphery of the light emitting surface 20a, and a first shielding portion 81 and a second shielding portion 82 formed integrally with the display cover portion 83 and formed so as to shield at least a portion of the display device 20 from an optical path space 30A through which the display light L passes from within the housing 30 as a countermeasure against stray light.

[0107] According to this structure, the display cover 83 is integrally formed with the first shielding portion 81 and the second shielding portion 82, so it is not necessary to separately assemble the display cover 83 and the first shielding portion 81 and the second shielding portion 82. Therefore, the head-up display device 100 can be easily assembled.

[0108] In addition, the cover 80 is configured 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. According to this structure, the display device 20 can be assembled into the housing 30 from one direction, and there is no need to assemble the hood and the holder cover from different directions as in the structure described in Patent Document 1. Therefore, the head-up display device 100 can be easily assembled.

[0109] (2) The display device 20 includes: a plurality of light sources 42; a display panel 21 having a light emitting surface 20a for receiving illumination light from the plurality of light sources 42 and emitting display light L; a control element 22 for controlling the display panel 21; and a circuit substrate 41 on which the plurality of light sources 42 and the control element 22 are mounted.

[0110] According to this configuration, only one circuit board 41 is required, so that the head-up display device 100 can be easily assembled. In addition, the head-up display device 100 can be easily configured compactly.

[0111] (3) The circuit board 41 includes a light source board region 41A on which the plurality of 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 closer to the second shielding portion 82 than the light source board region 41A.

[0112] According to this configuration, by positioning the light source 42 away from the concave mirror 50 , the optical path distance of the display light L can be increased, making it easier to overlap the virtual image V with the real scenery. In addition, by controlling the substrate region 41B, the head-up display device 100 can be prevented from being enlarged.

[0113] (4) The cover 80 includes the locking portion 84 a located at the front end of the second shielding portion 82 away from the display cover portion 83 and locked to the locked protrusion 31 c which is an example of a locked portion located in the housing 30 .

[0114] According to this configuration, it is possible to suppress the second shielding portion 82 from shaking, and to suppress the generation of abnormal noise associated with the shaking.

[0115] (5) The display device 20 includes a light box 90 having a cylindrical portion 91 surrounding a plurality of light sources 42, and an optical path cover support portion 95 which is an example of a support portion integrally formed with the cylindrical portion 91 and indirectly supporting the second shielding portion 82 via the relay substrate 24 from the side opposite to the optical path space 30A.

[0116] According to this configuration, it is possible to suppress the second shielding portion 82 from shaking, and to suppress the generation of abnormal noise associated with the shaking.

[0117] (6) The display device 20 includes the heat sink 48 having the first plate portion 48 a in surface contact with the circuit board 41 and the second plate portion 48 b bent upward relative to the first plate portion 48 a and opposite to the weight direction.

[0118] According to this structure, the heat recovered by the first plate portion 48a can be easily dissipated upward along the second plate portion 48b.

[0119] (7) The head-up display device 100 includes: a folding mirror 60 as an example of a first reflector that reflects the display light L from the display device 20; and a concave mirror 50 as an example of a second reflector that reflects the display light L from the folding mirror 60. The second shielding portion 82 is inclined relative to the display cover portion 83 and is formed to extend along the display light L from the folding mirror 60 toward the concave mirror 50.

[0120] According to this configuration, the head-up display device 100 can be configured compactly.

[0121] In addition, the present invention is not limited to the above-mentioned embodiments and drawings. It can be appropriately modified (including deletion of components) within the scope of not changing the gist of the present invention. An example of the modification is described below.

[0122] (Variation Example)

[0123] In the above-described embodiment, either the first shielding portion 81 or the second shielding portion 82 may be omitted from the cover 80 .

[0124] In the above embodiment, the positions, numbers and shapes of the locking portions 84a, 84b, 84c and the locked convex portions 31c, 93c can be changed appropriately. For example, the locking portions 84a, 84b, 84c can be claws, and the locked convex portions 31c, 93c can be replaced by recesses into which the front ends of the claws are embedded. In addition, for example, the locking portions 84a and the locked convex portions 31c can be omitted.

[0125] In the above-described embodiment, a component mounted on either one of the relay substrate 24 and the circuit substrate 41 may be mounted on the other, or a component mounted on the other may be mounted on either one.

[0126] In the above embodiment, the relay substrate 24 may be omitted. In this case, the light path cover support portion 95 may directly support the second shielding portion 82. In addition, in the above embodiment, the light path cover support portion 95 of the lamp box 90 may be omitted.

[0127] In the above-described embodiment, the heat sink 48 is not limited to the L-shape, and may be in a fin shape.

[0128] In the above embodiment, the control substrate region 41B is disposed closer to the second shielding portion 82 than the light source substrate region 41A, but the present invention is not limited thereto and the control substrate region 41B may be disposed farther from the second shielding portion 82 than the light source substrate region 41A.

[0129] In the above-described embodiment, the circuit board 41 may be configured such that the light source board region 41A and the control board region 41B are separate boards.

[0130] In the above-mentioned embodiment, the mirror driving mechanism 70 may be omitted.

[0131] In the above embodiment, the display device 20 is not limited to a structure including a liquid crystal display panel, but may also be a structure including an organic EL (Electro Luminescence), a DMD (Digital Micromirror Device) or a MEMS (Micro Electro Mechanical Systems) mirror.

[0132] In the above-mentioned embodiments, the head-up display device 100 is used in a vehicle, but it is not limited thereto and may be mounted on a vehicle such as an airplane or a ship. In addition, the projection component is not limited to the windshield 201 and may be a dedicated combiner.

[0133] Description of Reference Numerals

[0134] 20: display device;

[0135] 20a: light exit surface;

[0136] 21: Display panel;

[0137] 22: control element;

[0138] 23a, 23b: cables;

[0139] 24: Relay substrate;

[0140] 30: Shell;

[0141] 30A: optical path space;

[0142] 31: lower housing;

[0143] 31L: bottom wall portion;

[0144] 31a: display device storage portion;

[0145] 31b, 32b: reflecting mirror storage part;

[0146] 31c, 93c: stopped convex parts;

[0147] 31d: convex part surrounding part;

[0148] 31e: Radiator exposed recess;

[0149] 31h: threaded hole;

[0150] 31j: receiving hole;

[0151] 31s: side wall;

[0152] 32: upper shell;

[0153] 32a: window;

[0154] 40: Lighting device;

[0155] 41: Circuit board;

[0156] 41A: light source substrate area;

[0157] 41B: control substrate region;

[0158] 41c: Connector;

[0159] 41h, 48h: through hole;

[0160] 41s: base plate fixing screw;

[0161] 42: light source;

[0162] 45, 46, 47: lens;

[0163] 45a, 45b, 46a, 46b, 47a, 47b: positioning parts;

[0164] 45p: positioning pin;

[0165] 48: Radiator;

[0166] 48a: first plate portion;

[0167] 48b: second plate portion;

[0168] 48j: screw through hole;

[0169] 49: Radiator fixing screw;

[0170] 50: concave mirror;

[0171] 60: Reentry mirror;

[0172] 70: reflector drive mechanism;

[0173] 80: hood;

[0174] 81: first shielding portion;

[0175] 82: second shielding portion;

[0176] 82a: side wall portion;

[0177] 83: display cover;

[0178] 84a, 84b, 84c: locking parts;

[0179] 85a, 85b, 85c: display panel force applying part;

[0180] 85d, 85e: display panel positioning part;

[0181] 86L: L-shaped part;

[0182] 86a, 86b: contact portion;

[0183] 90: Light box;

[0184] 90h: Radiator fixing threaded hole;

[0185] 91: barrel;

[0186] 91a, 91b: lens positioning pins;

[0187] 93: display panel setting unit;

[0188] 93a: panel setting surface;

[0189] 93b, 95b: elastic supporting parts;

[0190] 93h: light passes through the hole;

[0191] 95: optical path cover supporting portion;

[0192] 100: head-up display device;

[0193] 201: Windshield;

[0194] L: display light;

[0195] V: virtual image;

[0196] AX: rotation axis;

[0197] Sk, Sj: gap.

Claims

1. A head-up display device, characterized in that: The head-up display device comprises: A display device having a light emitting surface for emitting display light; a reflector that reflects the display light; a housing that accommodates the display device and the reflector; and The cover comprises: a display cover portion surrounding the outer periphery of the light emitting surface; and a shielding portion formed integrally with the display cover portion and formed to shield at least a portion of the display device from an optical path space in the housing through which the display light passes.

2. The head-up display device according to claim 1, characterized in that: The display device comprises: Multiple light sources; A display panel having the light emitting surface, the display panel receiving illumination light from the plurality of light sources and emitting the display light; a control element that controls the display panel; and A circuit substrate is provided with the plurality of light sources and the control element mounted thereon.

3. The head-up display device according to claim 2, characterized in that: The circuit substrate comprises: a light source substrate region, on which the plurality of light sources are mounted; and a control substrate area on which the control element is mounted, The control substrate region is disposed at a position closer to the shielding portion than the light source substrate region.

4. The head-up display device according to claim 1, characterized in that: The cover has a locking portion, which is located at a front end portion of the shielding portion away from the display cover portion and is locked to a locked portion located in the housing.

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

6. The head-up display device according to claim 2, characterized in that: The display device includes a heat sink having a first plate portion in surface contact with the circuit substrate and a second plate portion bent in an upward direction opposite to a weight direction with respect to the first plate portion.

7. The head-up display device according to any one of claims 1 to 6, characterized in that: The head-up display device comprises: a first reflecting mirror serving as the reflecting mirror to reflect the display light from the display device; and a second reflecting mirror, which is different from the first reflecting mirror and reflects the display light from the first reflecting mirror, The shielding portion is inclined with respect to the display cover portion, and is formed so as to extend along the display light from the first reflector toward the second reflector.

Images