Head-up display

Abstract

The present embodiment comprises: an illumination optical module comprising a plurality of light sources; an image generator that receives light generated from the plurality of light sources and generates image light; and a heat dissipation mechanism that dissipates heat from the illumination optical module and the image generator. The heat dissipation mechanism comprises an illumination heat dissipation unit for dissipating heat of the plurality of light sources; and an image generator heat dissipation unit that dissipates heat of the image generator. The illumination heat dissipation unit comprises a first heat dissipation unit used for dissipating heat of at least one light source in the plurality of light sources; and the second heat dissipation unit is used for dissipating heat of another light source in the plurality of light sources.

Description

Technical Field

[0001] This invention relates to a head-up display. Background Technology

[0002] A head-up display (HUD) is a device installed in a vehicle that projects an image onto the vehicle's windshield. Vehicle HUDs can display various information, including vehicle operating information.

[0003] The head-up display includes: a display panel that generates and outputs image light; and at least one mirror that reflects the image light generated on the display panel.

[0004] The light from the image generated on the display panel can be incident on the vehicle's windshield through the mirror, allowing the driver to perceive a virtual image in front of the windshield.

[0005] Korean Patent Publication No. 10-2467924B1 (November 17, 2022) discloses a head-up display for vehicles.

[0006] A head-up display for vehicles includes: a housing having an internal space and disposed below a windshield; an image mechanism housed in the internal space and emitting first linearly polarized light in a first direction; an internal mirror disposed separately from the image mechanism in the internal space and reflecting the first linearly polarized light emitted from the image mechanism in the first direction; a polarizing film that allows the first linearly polarized light reflected from the internal mirror to pass through and reflects second linearly polarized light in a second direction orthogonal to the first direction; and a phase-delay mirror disposed outside the internal space that converts the phase of the first linearly polarized light reflected from the internal mirror and transmitted through the polarizing film into second linearly polarized light and emits it toward the polarizing film; the second linearly polarized light emitted from the phase-delay mirror is reflected by the polarizing film to the windshield; and the first linearly polarized light reflected from the internal mirror passes through the polarizing film and then toward the windshield. Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The purpose of this embodiment is to provide a head-up display that can effectively dissipate heat from a plurality of light sources and an image generator.

[0009] Technical solutions to the problem

[0010] The head-up display of this embodiment includes: an illumination optics module including a plurality of light sources; an image generator that receives light generated from the plurality of light sources and generates image light; and a heat dissipation mechanism for dissipating heat from the illumination optics module and the image generator.

[0011] The heat dissipation mechanism includes: an illumination heat dissipation unit for dissipating heat from a plurality of light sources; and an image generator heat dissipation unit for dissipating heat from the image generator.

[0012] The lighting heat dissipation unit includes: a first heat dissipation unit for dissipating heat from at least one of the plurality of light sources; and a second heat dissipation unit for dissipating heat from another of the plurality of light sources.

[0013] The head-up display may also include: a housing; and a screen, housed within the housing.

[0014] The first heat dissipation unit may include: a heat dissipation connector, which is in thermal contact with the first light source and the second light source among a plurality of light sources, and in thermal contact with the cover; and a first heat sink, which is in thermal contact with the heat dissipation connector.

[0015] The first light source can be an R light source (red light source) that illuminates red light; the second light source can be a G light source (green light source) that illuminates green light.

[0016] The first heat dissipation unit may further include: a first thermal pad disposed between the first light source and the heat dissipation connector; a second thermal pad disposed between the second light source and the heat dissipation connector; and a third thermal pad disposed between the heat dissipation connector and the first heat sink.

[0017] The heat dissipation connector may include: a thermal contact body that contacts each of the first, second, and third thermal pads; a housing contact body that contacts a housing; and a connecting body that connects the thermal contact body and the housing contact body.

[0018] The first heat dissipation unit may also include a cover plate that covers the contact body of the shroud.

[0019] The second heat dissipation unit may include a second heat sink that is in thermal contact with a third light source among a plurality of light sources.

[0020] The third light source can be a B light source (blue light source) that emits blue light.

[0021] The size of the second heat sink can be smaller than that of the first heat sink.

[0022] The second heat dissipation unit may also include a thermal pad disposed between the third light source B and the second heat sink.

[0023] The direction of light illumination of at least one of the plurality of light sources may be different from the direction of light illumination of another of the plurality of light sources.

[0024] The image generator heat dissipation unit may include a heat sink that is in thermal contact with the image generator.

[0025] The image generator heat dissipation unit may also include a thermal pad configured between the image generator and the heat sink.

[0026] The illumination optics module may further include: a base having a space; a cover covering the space; a plurality of optical elements guiding light from the plurality of light sources toward the image generator; a prism allowing light passing through the plurality of optical elements to pass through to the image generator and reflecting image light generated from the image generator; and a retainer fixing the prism to at least one of the base and the cover.

[0027] Multiple optical devices, prisms, holders, and image generators can be accommodated in space.

[0028] Multiple light sources can be configured on the base.

[0029] The lighting heat dissipation unit and the image generator heat dissipation unit can be configured on the outside of the base.

[0030] Invention Effects

[0031] According to this embodiment, the first heat dissipation unit dissipates heat to at least one of the plurality of light sources, the second heat dissipation unit dissipates heat to another of the plurality of light sources, and the image generator heat dissipation unit can dissipate heat to the image generator, thereby enabling more effective heat dissipation for each of the plurality of light sources and the image generator.

[0032] In addition, the heat dissipation connector of the first heat dissipation unit is in thermal contact with each of the first light source, the second light source, and the housing. The heat from the first light source and the second light source is transferred to the housing through the heat dissipation connector, so the housing can be used as a heat sink.

[0033] In addition, the heat from the first light source and the heat from the second light source can be dispersed to the first heat sink and the cover, thereby enabling faster heat dissipation from the first light source and the second light source.

[0034] In addition, the housing of the heat dissipation connector can be protected by a cover plate.

[0035] In addition, the light illumination direction of at least one of the plurality of light sources is different from that of another of the plurality of light sources, thereby enabling the lighting optical module to be more compact. Attached Figure Description

[0036] Figure 1 This is a diagram of the head-up display showing information in this embodiment.

[0037] Figure 2 This is a schematic diagram illustrating the head-up display of this embodiment.

[0038] Figure 3 This is a perspective view that schematically illustrates the light path of an example of a head-up display in this embodiment.

[0039] Figure 4This is an exploded perspective view of an example of a head-up display in this embodiment.

[0040] Figure 5 It is shown Figure 4 The rear view inside the image generation unit of the head-up display shown.

[0041] Figure 6 This is a perspective view of the image generation unit in this embodiment.

[0042] Figure 7 This is an exploded perspective view of the lighting optical module in this embodiment.

[0043] Figure 8 This is a perspective view showing the lighting optical module and the cover of this embodiment.

[0044] Figure 9 This is an exploded perspective view of the projection optical module in this embodiment.

[0045] Figure 10 This is a perspective view showing the light-transmitting portion formed on the cover or top cover in this embodiment.

[0046] Figure 11 This is a perspective view showing the light-transmitting portion of the image generation unit in this embodiment.

[0047] Figure 12 This is a perspective view showing the head-up display of this embodiment.

[0048] Figure 13 This is a side view of the head-up display in this embodiment.

[0049] Figure 14 This is a perspective view showing the screen module of this embodiment.

[0050] Figure 15 This is an exploded perspective view of the screen module in this embodiment.

[0051] Figure 16 This is a magnified view of the tilter in this embodiment.

[0052] Figure 17 This is a partial sectional perspective view of the movable bracket in this embodiment.

[0053] Figure 18 This is a cross-sectional view of the screen in this embodiment.

[0054] Figure 19 This is a rear view of the screen showing this embodiment.

[0055] Figure 20 This is a cross-sectional view of the Fresnel layer of the screen in this embodiment.

[0056] Figure 21This is a perspective view showing a modified example of a head-up display according to this embodiment.

[0057] Figure 22 This is a perspective view showing the interior of a modified example of the head-up display of this embodiment.

[0058] Figure 23 This is a schematic diagram showing a modified example of a head-up display according to this embodiment.

[0059] Figure 24 This is a control block diagram of the head-up display in this embodiment. Detailed Implementation

[0060] The following is related to the appendix. Figure 1 The specific embodiments of the present invention will be described in detail below.

[0061] Figure 1 This is a diagram showing the information displayed on the head-up display in this embodiment. Figure 2 This is a schematic diagram illustrating an example of a head-up display according to this embodiment.

[0062] The head-up display can be installed on the dashboard and emits an image light D toward the vehicle's windshield WS, so that the driver H1 or passenger H2 or other occupants H can recognize the virtual image FI in front of the windshield.

[0063] Multiple head-up displays can be installed on the dashboard, and the multiple head-up displays may include: a first head-up display that provides information FI1 to the driver H1 sitting in the driver's seat; and a second head-up display that provides information FI2 to the passenger H2 sitting in the front passenger seat.

[0064] One example of a first head-up display could provide a wide hover screen (WHS) for the driver H1.

[0065] Another example of a first head-up display can be an ultra-wide hovescreen (EWHS). The horizontal length of the ultra-wide hovescreen (EWHS) can be longer than that of the wide hovescreen.

[0066] The first head-up display can replace the instrument cluster or CID (vehicle information guidance display).

[0067] The second head-up display can provide a passenger hover screen (PHS) for the passenger H2 sitting in the front passenger seat.

[0068] The second head-up display can provide a large virtual infotainment display of 20 inches or more.

[0069] The second head-up display can provide device control such as navigation or air conditioning adjustment, entertainment such as music or movies, internet search, or mobile office or mobile connecting.

[0070] The second head-up display can replace the CDD (passenger seat display).

[0071] Figure 3 This is a perspective view that schematically illustrates the light path of an example of a head-up display in this embodiment. Figure 4 This is an exploded perspective view of an example of a head-up display in this embodiment. Figure 5 It is shown Figure 4 The rear view inside the image generation unit of the head-up display shown.

[0072] The head-up display of this embodiment may include: a housing 1, which has a space S1 inside; a screen module 2, which is housed in the space S1 and faces the windshield WS; and a picture generation unit 3, which generates image light D outside the space S1 and projects the image light D onto the screen module 2.

[0073] The cover 1 can form the appearance of a head-up display.

[0074] The top surface of the cover 1 can be open. The cover 1 may include a peripheral body 1a surrounding the outer periphery of the screen module 2. The cover 1 may include a base plate 1b formed inside the peripheral body 1a. The internal space S1 may be formed by the peripheral body 1a and the base plate 1b. A fastening part 1c may be formed in the cover 1 for fastening to the instrument panel with fastening members such as screws.

[0075] The housing 1 can be made of metal. Heat from the image generation unit 3 can be transferred to the housing 1, and the housing 1 can dissipate the heat transferred from the image generation unit 3. The housing 1 can be made of metal. The housing 1 can be aluminum (Al). The housing 1 can be a heat sink for dissipating heat transferred from the image generation unit 3.

[0076] A top cover 11 can be configured on the cover 1.

[0077] The top cover 11 can be disposed on the upper part of the cover 1. The top cover 11 can be fastened to the cover 1 by fastening members such as screws. An opening 11a can be formed in the top cover 11. The top cover 11 can be made of polycarbonate (PC).

[0078] A dust cover 12 may be provided on the top cover 11.

[0079] The dust cover 12 can cover the space S1 and prevent dust and other foreign objects from entering the space S1. The dust cover 12 can be attached to the top cover 11 with double-sided tape 13. The double-sided tape 13 can be polyurethane foam (PU foam).

[0080] The head-up display may include a control board 14 and a bottom cover 15.

[0081] The control board 14 can be disposed on the housing 1. The control board 14 can control the overall operation of the head-up display. The control board 14 can be fixed to one of the housing 1 and the bottom cover 15. The control board 14 can be disposed on the bottom surface of the base plate 1a. The control board 14 can be mounted to the base plate 1a by fastening components such as screws. The control board 14 may include a main PCB (printed circuit board) housed between the housing 1 and the bottom cover 15.

[0082] The bottom cover 15 can be attached to the housing 1. The bottom cover 15 can be disposed on the underside of the housing 1. The bottom cover 15 can form the bottom surface appearance of the head-up display. The bottom cover 15 can cover the control board 14. The bottom cover 15 can be a PCB cover protecting the main PCB. The bottom cover 15 can be made of polycarbonate (PC).

[0083] Image light projected from image generation unit 3 can be imaged on screen module 2. Screen module 2 can then reflect the image light D onto the windshield WS.

[0084] Screen module 2 can be generally rectangular in shape. Screen module 2 can have a long side in the left-right direction and a short side in the front-back direction. Screen module 2 can include one end 2a and another end 2b, and the distance between one end 2a and the image generation unit 3 can be shorter than the distance between the other end 2b and the image generation unit 3. One end 2a of screen module 2 can be the rear end in the front-back direction of the vehicle. The other end 2a of screen module 2 can be the front end in the front-back direction of the vehicle.

[0085] Screen module 2 may include screen 21. Image light D can be imaged on screen 21. Screen 21 may face the windshield WS. Screen 21 may reflect image light D onto the windshield WS. A Fresnel pattern may be formed on screen 21. Screen 21 may have a directional anisotropic micro-Fresnel pattern and may have a diffuse pattern. Screen 21 may be disposed in housing 1. Screen 21 may be housed in space S1 of housing 1 and may reflect image light D toward the windshield WS. Screen 21 may be composed of an assembly of multiple components.

[0086] The screen module 2 may also include a screen holder 22. The screen holder 22 can support the screen 21. The screen holder 22 can form the bezel of the screen module 2. The screen 21 can be disposed on the screen holder 22. A space for accommodating the screen 21 can be formed in the screen holder 22.

[0087] The screen module 2 may also include a screen cover 23. The screen cover 23 may be disposed on the upper side of the screen 21. The screen cover 23 may cover the bezel of the screen 21. An opening 23a may be formed in the screen cover 23 to allow image light D to pass through. The screen cover 23 may be made of polycarbonate (PC).

[0088] The screen module 2 may also include screen tape 24. Screen tape 24 can attach the screen 21 or screen cover 23 to the screen holder 22. Screen tape 24 can be attached to the screen holder 22. Screen tape 24 may be made of polyethylene (PE).

[0089] The image generation unit 3 may include: an illumination optics module 4 that generates and illuminates light; an image generator 6 that receives the light illuminated by the illumination optics module 4 and generates an image light D; and a projection optics module 7 that projects the image light D generated by the image generator 6 onto the screen module 2.

[0090] The image generation unit 3 may be a rear image generation unit that is configured on the back of the cover 1 and the back of the top cover 11 and projects image light D toward the screen 21 of the screen module 2.

[0091] When the head-up display provides a wide hover screen (WHS), the image generation unit 3 can be configured on the back of the housing 1 or the back of the top cover 11.

[0092] The image generation unit 3 can provide a large screen. In order to minimize the size, it can use a light-emitting diode (LED) or a laser diode and image the image on the screen 21 through a projection optics system or a MEMS scanner.

[0093] The illumination optics module 4 can generate light and illuminate the image generator 6.

[0094] The illumination optical module 4 may include: a plurality of light sources 41, 42, 43 for illuminating light; dual-frequency mirrors 44, 45, the number of which is less than the number of light sources 41, 42, 43; a compound eye lens 46 for separating light and forming a square illumination shape; a first relay lens 47 for focusing the light separated by the compound eye lens 46; an illumination conversion mirror 48 for reflecting the light transmitted through the first relay lens 47; and a second relay lens 49 for focusing the light reflected by the illumination conversion mirror 49.

[0095] An example of each of the plurality of light sources 41, 42, 43 may include a light-emitting diode (LED).

[0096] Another example of each of the plurality of light sources 41, 42, 43 may include a laser diode (LD).

[0097] The plurality of light sources 41, 42, 43 may include a first light source 41, a second light source 42, and a third light source 43.

[0098] The plurality of light sources 41, 42, and 43 may include a first light source 41 that emits red laser light, a second light source 42 that emits green laser light, and a third light source 43 that emits blue laser light.

[0099] The first light source 41 can be an R light source that illuminates red light. The first light source 41 can also be an R laser light source that emits red laser light.

[0100] The second light source 42 can be a G light source that illuminates green light. The second light source 42 can be a G laser light source that emits green laser light.

[0101] The third light source 43 can be a B-source that illuminates blue light. The third light source 43 can also be a B-laser source that emits blue laser light.

[0102] The light illumination direction of some of the plurality of light sources 41, 42 may be different from the light illumination direction of the remaining light sources 43. The light illumination direction of at least one of the plurality of light sources 41, 42 may be different from the light illumination direction of another light source 43 among the plurality of light sources 41, 42, 43.

[0103] The first light source 41 and the second light source 42 can be configured side by side.

[0104] Each of the first light source 41 and the second light source 42 can emit light in a vertical direction. Each of the first light source 41 and the second light source 42 can emit light in a downward direction.

[0105] The third light source 43 can illuminate light in the left-right direction. The third light source 43 can illuminate light in the direction below the first light source 41 and the second light source 42.

[0106] R light emanating from the first light source 41, G light emanating from the second light source 42, and B light emanating from the third light source 43 can be reflected by or through a dual-frequency mirror, and can be synthesized.

[0107] Multiple dual-frequency mirrors 44 and 45 can be provided. Multiple dual-frequency mirrors 44 and 45 can constitute a synthetic optical system that combines R-beams, B-beams, and B-beams.

[0108] Multiple dual-frequency mirrors 44 and 45, including the first dual-frequency mirror 44 and the second dual-frequency mirror 45.

[0109] An example of the first dual-frequency mirror 44 could be a dichroic mirror, which is formed of multiple thin layers of material with different refractive indices, reflecting one color of light while allowing other colors of light to pass through.

[0110] The first dual-frequency mirror 44 can reflect the R light generated from the first light source 41 and allow the B light emitted from the third light source 43 to pass through.

[0111] The first dual-frequency mirror 44 can be disposed below the first light source 41. The first dual-frequency mirror 44 can be disposed next to the third light source 43.

[0112] The first dual-frequency mirror 44 can be tilted to a set angle.

[0113] An example of the second dual-frequency mirror 45 could be a dichroic mirror, which is formed of multiple thin layers of material with different refractive indices, reflecting light of one color while allowing light of other colors to pass through.

[0114] The second dual-frequency mirror 44 can reflect the G light generated from the second light source 42, while allowing the R light emitted from the first light source 41 and the B light emitted from the third light source 43 to pass through. The second dual-frequency mirror 45 can be disposed below the second light source 42. The second dual-frequency mirror 45 can be disposed next to the first dual-frequency mirror 44. The second dual-frequency mirror 45 can be tilted at a set angle.

[0115] The illumination optical module 4 may also include at least one first collimating lens 41a, which is disposed between the first light source 41 and the first dual-frequency mirror 44 to collect light.

[0116] The illumination optical module 4 may also include at least one second collimating lens 42a, which is disposed between the second light source 42 and the second dual-frequency mirror 45 to collect light.

[0117] The illumination optical module 4 may also include at least one third collimating lens 43a, which is disposed between the third light source 43 and the first dual-frequency mirror 44 to collect light.

[0118] The compound eye lens 46 can be positioned next to the second dual-frequency mirror 44 to divide the synthesized tri-color light into multiple parts and form a square illumination shape.

[0119] The first relay lens 47 can be positioned between the compound eye lens 46 and the illumination conversion mirror 48.

[0120] The illumination conversion mirror 48 can reflect light transmitted through the first relay lens 47 downwards. The illumination conversion mirror 48 can be a conversion mirror that converts the light path. The illumination conversion mirror 48 can convert the light transmitted through the first relay lens 47 in a downward direction or a downward tilt direction. The illumination conversion mirror 48 can be configured at an angle like the dual-frequency mirrors 44 and 45.

[0121] The second relay lens 49 can be disposed below the first relay lens 47 and the illumination conversion mirror 48. The second relay lens 49 can focus the light reflected by the illumination conversion mirror 48 onto the prism 50.

[0122] The illumination optics module 4 may also include a prism 50. The prism 50 may be configured between the second relay lens 49 and the image generator 6.

[0123] Prism 50 allows light passing through the second relay lens 49 to pass through to the image generator 6, and allows the image light generated by the image generator 6 to be reflected to the projection optical module 7.

[0124] Prism 50 may include: a first prism 50a facing the second relay lens 49; and a second prism 50b, combined with the first prism 50a, facing the image generator 6 and the projection optics module 7.

[0125] The first prism 50a can be disposed above the second prism 50b. The first prism 50a may include a bottom surface facing the image generator 6, a side surface facing the projection optics module 7, and an inclined surface facing the second prism 50b.

[0126] The second prism 50b may include an inclined surface facing the first prism 50b, a top surface facing the second relay lens 49, and a side surface orthogonal to the top surface.

[0127] Light passing through the second relay lens 49 can pass through the second prism 50b and the first prism 50a in sequence.

[0128] The boundary surface (i.e., the inclined surface) of the first prism 50a and the second prism 50b can be a transmission surface that allows light passing through the second relay lens 49 to pass through, or a reflection surface that reflects the image light generated by the image generator 6 to the projection optical module 7.

[0129] At least a portion of the light path (path 1, path 2) of the illumination optical module 4 can be parallel to one end 2a of the screen module 2.

[0130] The light path (path 1, path 2) of the illumination optical module 4 may include: a first light path (path 1) that is long in the left-right direction; and a second light path (path 2) that is tilted at a predetermined angle relative to the first light path (path 1) and is orthogonal to the first light path (path 1).

[0131] The first optical path (path 1) can be parallel to one end 2a of the screen module 2.

[0132] The third light source 43, the first dual-frequency mirror 44, the second dual-frequency mirror 45, the compound eye lens 46, the first relay lens 47, and the illumination conversion mirror 48 can be arranged in a row along the left and right directions to form the first light path (path 1).

[0133] The third light source 43, the first dual-frequency mirror 44, the second dual-frequency mirror 45, the compound eye lens 46, the first relay lens 47, and the illumination conversion mirror 48 can be arranged in a row on the first light path (path 1).

[0134] The illumination conversion mirror 48, the second relay lens 49, and the prism 50 can form a second optical path (path 2). The illumination conversion mirror 48, the second relay lens 49, and the prism 50 can be arranged in a row on the second optical path (path 2).

[0135] Image generator 6 can be configured below illumination optics module 4. Image generator 6 can be configured below prism 50. Illumination conversion mirror 48, second relay lens 49, prism 50 and image generator 6 can be configured in a row on the second optical path (path 2).

[0136] Image generator 6 can receive light passing through prism 50 and generate image light.

[0137] Examples of image generator 6 may include projection optical systems or microelectromechanical systems (MEMS) scanners (hereinafter referred to as MEMS scanners).

[0138] MEMS scanners can control the direction of the incident laser beam by rotating a reflective mirror using voltage.

[0139] Ultrashort focal length optical systems have high magnification, are difficult to design, and are sensitive to temperature. In contrast, MEMS scanners can be focus-free optical systems that can easily achieve imaging performance.

[0140] The light emitted from the first light source 41, the second light source 42, and the third light source 43 can be combined by a light-collecting lens (e.g., a collimating lens) and a combining optical system. The combined laser can be incident on the MEMS scanner and reflected, and can be scanned and imaged on the surface of the screen 21.

[0141] Compared to the case of using an ultra-short focal length optical system, the structure of the image generation unit 3 can be simpler and its volume can be minimized when the image light generated by the MEMS scanner is imaged on the screen 21.

[0142] The illumination optics module 4 and the image generator 6 can constitute an optical module for generating image light D.

[0143] The projection optics module 7 may include: at least one projector lens 71; a projection conversion mirror 72 that reflects the image light D transmitted through the projector lens 71; and a concave mirror 73 that magnifies the image light D reflected from the projection conversion mirror 72 onto the screen module 2.

[0144] The projector lens 71 can be positioned between the prism 50 and the projection conversion mirror 72. The projector lens 71 can magnify and project small images to form a large screen.

[0145] The projector lens 71 may include a plurality of lenses arranged in a row, which may be arranged in a row along the left-right direction.

[0146] The projection conversion mirror 72 allows the image generation unit 3 to be maximized in compactness. The projection conversion mirror 72 can be a conversion mirror that converts the light path. The projection conversion mirror 72 can convert the image light passing through the projector lens 71 in an upward direction. The projection conversion mirror 72 can be parallel to the illumination conversion mirror 48. The projection conversion mirror 72 can reflect the image light passing through the projector lens 71 to the concave mirror 73.

[0147] The concave mirror 73 can be configured above the projection conversion mirror 72. The concave mirror 73 can reflect image light D onto the top surface of the screen 21.

[0148] At least a portion of the optical path (path 3) in the optical path (path 4, path 5) of the projection optical module 7 can be parallel to one end 2a of the screen module 2.

[0149] The optical paths (paths 3, 4, and 5) of the projection optical module 7 may include a third optical path (path 3) that is long in the left-right direction; and a fourth optical path (path 4) that is tilted at a predetermined angle or orthogonally bent relative to the third optical path (path 3).

[0150] The third light path (path 3) can be parallel to one end 2a of the screen module 2.

[0151] A plurality of projector lenses 71 and projection conversion mirrors 72 can form a third light path (path 3).

[0152] The projection conversion mirror 72 and the concave mirror 73 can form a fourth light path (path 4).

[0153] The light path (path 3, path 4, path 5) of the projection optical module 7 may also include a fifth light path path 5 that directs the light reflected from the concave mirror 73 toward the screen 21.

[0154] The image generation unit 3 is preferably configured to be as compact as possible outside the cover 1, and preferably the width in the left-right direction and the height in the up-down direction of the image generation unit 3 are minimized to the maximum extent.

[0155] The illumination optical module 4 can be configured as follows: The projection optical module 7 can be configured in an approximate "L" shape.

[0156] A portion of the illumination optics module 4 can be configured in the area next to the concave mirror 73 and above the projector lens 71.

[0157] Multiple light sources 41, 42, 43 and dual-frequency mirrors 44, 45 can be configured in the area next to the concave mirror 73 and above the projector lens 71.

[0158] Another part of the illumination optics module 4 can be configured in the area next to the projector lens 71.

[0159] The second relay lens 49 and prism 50 can be configured in the area next to the projector lens 71.

[0160] The projection conversion mirror 72 can be configured in the area next to the projector lens 71 and below the concave mirror 73.

[0161] The lower part of the illumination optical module 4 is preferably positioned next to the projector lens 71.

[0162] Figure 6 This is a perspective view of the image generation unit in this embodiment. Figure 7 This is an exploded perspective view of the lighting optical module in this embodiment. Figure 8 This is a perspective view showing the lighting optical module and the cover of this embodiment.

[0163] Each of the first light source 41, the second light source 42, and the third light source 43 may include a substrate and an optical device mounted on the substrate. An example of the optical device may be an LED diode.

[0164] The first light source 41 may further include a first light source holder 41b for fixing the substrate. The first light source 41 may also include a rubber holder 41c disposed between the substrate and the first light source holder 41b.

[0165] The second light source 42 may further include a second light source holder 42b for fixing the substrate. The second light source 42 may also include a rubber holder 42c disposed between the substrate and the second light source holder 42b.

[0166] The third light source 43 may further include a third light source holder 43b for fixing the substrate. The third light source 43 may also include a rubber holder 43c disposed between the substrate and the third light source holder 43b.

[0167] The image generation unit 3 may also include a heat dissipation mechanism. The heat dissipation mechanism can dissipate the heat from the plurality of light sources 41, 42, 43 and the heat from the image generator 6.

[0168] The heat dissipation mechanism may include a lighting heat dissipation unit 51. The lighting heat dissipation unit 51 can dissipate heat from the lighting optical module 4. The lighting heat dissipation unit 51 can dissipate heat from a plurality of light sources 41, 42, and 43.

[0169] The lighting heat dissipation unit 51 may include a heat sink with a plurality of fins that can dissipate heat into the air.

[0170] A plurality of lighting heat dissipation units 51 may be provided. The plurality of lighting heat dissipation units 51 may include a first heat dissipation unit 51A and a second heat dissipation unit 51B.

[0171] At least one of the first heat dissipation unit 51A and the second heat dissipation unit 51B can dissipate heat from a plurality of light sources.

[0172] The number of light sources in the first heat dissipation unit 51A and the second heat dissipation unit 51B can be different. The number of light sources in the first heat dissipation unit 51A can be more than the number of light sources in the second heat dissipation unit 51B.

[0173] The first heat dissipation unit 51A can dissipate heat from at least one of the plurality of light sources 41, 42, and 43. The first heat dissipation unit 51A can dissipate heat from two laser light sources 41 and 42.

[0174] The second heat dissipation unit 51B can dissipate heat from another light source among the plurality of light sources 41, 42, and 43. The other light source among the plurality of light sources 41, 42, and 43 can be the remaining light source 43 among the plurality of light sources 41, 42, and 43 that has not been dissipated by the first heat dissipation unit 51A. The second heat dissipation unit 51B can dissipate heat from a single laser light source.

[0175] The first heat dissipation unit 51A can dissipate heat from the relatively high-heat light sources among the first light source 41, the second light source 42, and the third light source 43. The first light source 41 is more susceptible to heat than the other laser light sources 42 and 43.

[0176] The first heat dissipation unit 51A can dissipate heat from the light source that is relatively susceptible to heat among the first light source 41, the second light source 42, and the third light source 43. The power of the second light source 42 can be higher than the power of the other laser light sources 41 and 43.

[0177] The first heat dissipation unit 51A can dissipate heat for both the first light source 41 and the second light source 42.

[0178] The first heat dissipation unit 51A can make thermal contact with each of the first light source 41 and the second light source 42.

[0179] The first heat dissipation unit 51A may include a first heat sink having a plurality of fins. The first heat dissipation unit 51A may also include a thermal pad 52. The first heat dissipation unit 51A may also include a heat dissipation connector 53.

[0180] The first heat sink can be in thermal contact with the heat sink connector 53. A portion of the heat transferred to the heat sink connector 53 can be transferred to the first heat sink, and heat can be dissipated from the first heat sink to the atmosphere.

[0181] The thermal pad 52 can be disposed between the first heat sink and the first light source 41, and between the first heat sink and the second light source 42.

[0182] At least one thermal pad 52 may be provided. A plurality of thermal pads 52 may be provided. The plurality of thermal pads 52 may include a first thermal pad 52A, a second thermal pad 52B, and a third thermal pad 52C.

[0183] The first thermal pad 52A can be disposed on the first light source 41. The first thermal pad 52A can be disposed on the top surface of the first light source 41. The first thermal pad 52A can be an R-type thermal pad. The first thermal pad 52A can be disposed between the first light source R and the heat dissipation connector 53.

[0184] The second thermal pad 52B can be disposed on the second light source 42. The second thermal pad 52B can be disposed on the top surface of the second light source 42. The second thermal pad 52B can be a G thermal pad. The second thermal pad 52B can be disposed between the second light source G and the heat dissipation connector 53.

[0185] The third thermal pad 52C can be disposed on the first heat sink. The third thermal pad 52C can be in contact with the first heat sink. The third thermal pad 52C can be a common thermal pad for transferring heat from the first light source 41 and the second light source 42 to the first heat sink. The third thermal pad 52C can be disposed between the thermal connector 53 and the first heat sink.

[0186] The heat dissipation connector 53 can constitute a first heat dissipation unit 51A, or can be a part of the first heat dissipation unit 51A. The heat dissipation connector 53 can transfer heat from the illumination optical module 4 to the housing 1. The heat dissipation connector 53 can be a heat transfer component for transferring heat from the illumination optical module 4 to the housing 1. An example of the heat dissipation connector 53 can be a copper plate. The heat dissipation connector 53 can transfer heat from the first light source 41 and the second light source 42 to the housing 1. The heat dissipation connector 53 can make thermal contact with the first light source 41 and the second light source 42 among the plurality of light sources 41, 42, and 43. The heat dissipation connector 53 can make thermal contact with the housing 1.

[0187] The heat dissipation connector 53 may include: a thermal contact body 53A that contacts the thermal pad 52; a housing contact body 53B that contacts the housing 1; and a connecting body 53C that connects the thermal contact body 53A and the housing contact body 53B.

[0188] The thermal contact body 53A can contact each of the first thermal pad 52A, the second thermal pad 52B, and the third thermal pad 52C.

[0189] The bottom surface of the thermal contact body 53A can contact each of the first thermal conductive pad 52A and the second thermal conductive pad 52B. The top surface of the thermal contact body 53A can contact the third thermal conductive pad 52C. The thermal contact body 53A can be a heat-absorbing body that contacts the thermal conductive pad 52 and absorbs heat transferred from the first light source 41 and from the second light source 42.

[0190] The cover contact body 53B can be located inside the cover 1. The cover contact body 53B can be a cover contact body that contacts the cover 1. The cover contact body 53B can contact the base plate 1b of the cover 1. The cover contact body 53B can be a heat dissipation body that transfers heat from the first light source 41 and heat from the second light source 42 to the cover 1.

[0191] The housing contact body 53B can be covered by a cover plate 53D. The cover plate 53D can be made of electro-galvanized steel sheet (SECC). The cover plate 53D can be fastened to the housing 1 by screws or other fastening components. The cover plate 53D can cover the housing contact body 53B from the underside. The cover plate 53D can constitute a first heat dissipation unit 51A. The cover plate 53D can be part of the first heat dissipation unit 51A.

[0192] The connecting body 53B can be formed elongated in the vertical direction, and can transfer heat from the thermal contact body 53A to the cover contact body 53B. The connecting body 53B can be at each bend of the thermal contact body 53A and the cover contact body 53B. The connecting body 53B can contact the peripheral body 1a of the cover 1. The connecting body 53B and the cover contact body 53B can be heat dissipation bodies that transfer heat from the first light source 41 and heat from the second light source 42 to the cover 1.

[0193] The heat dissipation connector 53 can transfer the heat from the first light source 41 and the second light source 42 to the cover 1 through the heat contact body 53A, and the heat transferred to the cover 1 can be diffused by the cover 1.

[0194] The cover 1 that contacts the heat dissipation connector 53 can function as a heat sink to dissipate the heat from the first light source 41 and the second light source 42, thereby minimizing the damage to the first light source 41 or the second light source 42 caused by heat.

[0195] The heat from the first light source 41 and the second light source 42 can be conducted to the first heat dissipation unit 51A through the thermal contact body 53A, and can be dissipated from the first heat dissipation unit 51A to the atmosphere.

[0196] The heat from the first light source 41 and the second light source 42 can be conducted to the housing 1 through the heat dissipation connector 53, and can be dissipated from the housing 1 to the atmosphere.

[0197] The first light source 41 and the second light source 42 can be effectively cooled by each of the first heat dissipation unit 51A and the cover 1.

[0198] The second heat dissipation unit 51B can dissipate heat from the third light source 43 among the plurality of light sources 41, 42, and 43. The second heat dissipation unit 51B may include a second heat sink that is in thermal contact with the third light source 43 among the plurality of light sources 41, 42, and 43. The size of the second heat sink may be smaller than the size of the first heat sink.

[0199] The second heat dissipation unit 51B can dissipate heat from the third light source 43. The second heat dissipation unit 51B can be in thermal contact with the third light source 43. The second heat dissipation unit 51B may also include a thermally conductive pad 54 disposed between the third light source 43 and the second heat sink. The thermally conductive pad 54 may be a fourth thermally conductive pad, different from the first thermally conductive pad 52A, the second thermally conductive pad 52B, and the third thermally conductive pad 52C.

[0200] One example of the second heat dissipation unit 51B can be separated from the first heat dissipation unit 51A. Another example of the second heat dissipation unit 51B can be in thermal contact with the first heat dissipation unit 51A.

[0201] The image generation unit 3 may include an image generator heat dissipation unit 55.

[0202] The image generator heat dissipation unit 55 can dissipate heat from the image generator 6. The image generator heat dissipation unit 55 can be in thermal contact with the image generator 6. The image generator heat dissipation unit 55 may include a heat sink that is in thermal contact with the image generator (DMD). The heat sink of the image generator heat dissipation unit 55 may be formed with a plurality of fins, which can dissipate heat into the atmosphere.

[0203] The heat sink of the image generator heat dissipation unit 55 may be a third heat sink, different from the first and second heat sinks. The heat sink of the image generator heat dissipation unit 55 may be in thermal contact with at least one of the first heat dissipation unit 51A and the second heat dissipation unit 51B.

[0204] The lighting optical module 4 may also include a base 56 and a cover 57.

[0205] A space S2 may be formed in one of the base 56 and the cover 57, and the space S2 may be covered by the other of the base 56 and the cover 57. The space S2 may be formed inside the base 56, and the cover 57 may cover the space S2.

[0206] The base 56 can be equipped with a plurality of light sources 41, 42, and 43.

[0207] Multiple light sources 41, 42, and 43 can be configured on the outer surface of the base 56.

[0208] The base 56 may have a retainer mounting portion for mounting the first light source retainer 41b of the first light source 41 and a first light transmission hole 56a for transmitting R-light irradiated from the first light source 41. The first light source 41 may be disposed on the top surface of the base 56.

[0209] The base 56 may have a retainer mounting portion for mounting the second light source retainer 42b for the second light source 42, and a second light transmission hole 56b for transmitting G-light irradiated from the second light source 42. The second light source 42 may be disposed on the top surface of the base 56.

[0210] The base 56 may have a retainer mounting portion for mounting the third light source retainer 43b for the third light source 43, and a third light transmission hole 56c for transmitting B light irradiated from the third light source 43. The third light source 43 may be disposed on one side of the base 56.

[0211] Space S2 can accommodate all or part of the lighting optical module 4.

[0212] Space S2 can accommodate: a plurality of collimating lenses 41a, 42a, 43a; dual-frequency mirrors 44, 45; compound eye lens 46; first relay lens 47; illumination conversion mirror 48; second relay lens 49; and prism 50.

[0213] The plurality of collimating lenses 41a, 42a, 43a; dual-frequency mirrors 44, 45; compound eye lens 46; first relay lens 47; illumination conversion mirror 48; and second relay lens 49 may be a plurality of optical devices that guide light from the plurality of light sources 41, 42, 43 to the image generator 6.

[0214] Prism 50 can allow light passing through a plurality of optical devices to pass into image generator 6, and can reflect image light generated from image generator 6.

[0215] A plurality of optical devices and prisms 50 can be accommodated in space S2.

[0216] The space S2 can accommodate the prism holder 58 that fixes the prism 50.

[0217] The prism retainer 58 can be fastened to one of the base 56 and the cover 57.

[0218] The image generator 6 can be accommodated in space S2. The image generator 6 can be accommodated in space S2 and can be protected by base 56 and cover 57.

[0219] The image generator 6 may include a digital micromirror device (DMD) 61, an interposer 62, and a flexible circuit board 63.

[0220] The digital micromirror device 61 may have at least one micromirror built in.

[0221] Intermediate layer 62 may protrude downwards from the bottom surface of digital micromirror device 61. Intermediate layer 62 may be connected to flexible circuit board 63.

[0222] The image generation unit 3 may also include a spring 64 and a lower clip 65 disposed between the heat sink (i.e., the third heat sink) of the image generator heat dissipation unit 55 and the flexible circuit board 63.

[0223] Spring 64 can be configured between the heat sink (i.e., the third heat sink) of image generator heat dissipation unit 55 and lower clip 65.

[0224] The lower clip 65 can be configured between the spring 64 and the flexible circuit board 63.

[0225] The image generator 6 may also include an upper clip 66 configured between the digital micromirror device 61 and the flexible circuit board 63.

[0226] The image generator heat dissipation unit may include at least one thermal pad 66, 67. The at least one thermal pad 66, 67 may be configured between the image generator 6 and the heat sink (i.e., the third heat sink). A plurality of thermal pads may be provided. The plurality of thermal pads may also include an upper thermal pad 67 and a lower thermal pad 68.

[0227] The upper thermal pad 67 can contact the bottom surface of the digital micromirror device 61. The upper thermal pad 67 can be a fourth thermal pad, different from the first thermal pad 52A, the second thermal pad 52B, and the third thermal pad 55.

[0228] The upper clip 66 can be configured between the upper thermal pad 67 and the lower thermal pad 68.

[0229] The lower thermal pad 68 can contact the top surface of the flexible circuit board 63. The lower thermal pad 68 can be a fifth thermal pad that is different from the first thermal pad 52A, the second thermal pad 52B, the third thermal pad 55, and the fourth thermal pad.

[0230] Rubber 69 can be configured on the top surface of the digital micromirror device 61.

[0231] One example of the image generator heat dissipation unit 55 may be spaced apart from each of the first heat dissipation unit 51A and the second heat dissipation unit 51B. Another example of the image generator heat dissipation unit 55 may be in thermal contact with at least one of the first heat dissipation unit 51A and the second heat dissipation unit 51B.

[0232] The lighting heat dissipation unit 51 and the image generator heat dissipation unit 55 can be configured outside the base 56. The lighting heat dissipation unit 51 and the image generator heat dissipation unit 55 can be exposed to the outside of the base 56 and the cover 57.

[0233] The first heat dissipation unit 51A can cover the top surface of the base 56 and the upper part of one side of the base 56. The first heat dissipation unit 51A can be bent. The first heat dissipation unit 51A can include an upper body covering the top surface of the base 56 and a side body covering the upper part of one side of the base 56.

[0234] The second heat dissipation unit 51B may cover the other side of the base 56 and a portion of the cover 57. The second heat dissipation unit 51B may be in a bent shape. The second heat dissipation unit 51B may include a side body covering the other side of the base 56 and a rear body covering a portion of the cover 57.

[0235] The image generator heat dissipation unit 55 can cover the bottom surface of the base 56 and the lower part of one side of the base 56. The image generator heat dissipation unit 55 can be in a bent shape. The image generator heat dissipation unit 55 can include a lower body 55a covering the bottom surface of the base 56 and a side body 55b covering the lower part of one side of the base 56.

[0236] The heat dissipation unit assembly 51A, 51B, 55, consisting of the first heat dissipation unit 51A, the second heat dissipation unit 51B, and the image generator heat dissipation unit 55, can cover a portion of the outer surface of the illumination optical module 4.

[0237] The heat dissipation unit assembly 51A, 51B, 55, consisting of the first heat dissipation unit 51A, the second heat dissipation unit 51B, and the image generator heat dissipation unit 55, can cover the top surface, left and right sides, and bottom surface of the base 56, and can also cover the back of the cover 57.

[0238] The illumination optical module 4, the image generator 6, and the heat dissipation unit assemblies 51A, 51B, and 55 can constitute the optical module for generating image light D.

[0239] This optical module can be fastened to the projection optical module 7 by fastening members such as screws next to it. A fastening part can be formed in the illumination optical module 4, which can be fastened to the projection optical module 7 by fastening members such as screws. The fastening part can be formed in at least one of the base 56 and the cover 57.

[0240] Figure 9 This is an exploded perspective view of the projection optical module in this embodiment.

[0241] The projection optics module 7 may also include: a bottom housing 74 for housing the projector lens 71; a mirror holder 75 for housing the projection conversion mirror 72 and disposed in the bottom housing 74; and a top housing 76 for covering the concave mirror 73.

[0242] The bottom housing 74 can form a space S3 for accommodating the projector lens 71 and the projection conversion mirror 72.

[0243] The projector lens 71 may include a lens housing 71a that houses a plurality of lenses. The projection optics module 7 may include a lens assembly, which may include the lens housing 71a and a plurality of lenses housed within the lens housing 71a.

[0244] The bottom housing 74 can accommodate a lens assembly, and the concave mirror 73 can be supported on the bottom housing 74. The concave mirror 73 can be mounted on the bottom housing 74.

[0245] The bottom housing 74 may include a front bottom housing 74a and a rear bottom housing 74b coupled to the front bottom housing 74a. The front bottom housing 74a and the rear bottom housing 74b may be fastened by fastening members such as screws.

[0246] The space S3 for accommodating the projector lens 71 and the projection conversion mirror 72 can be formed between the front bottom housing 74a and the rear bottom housing 74b. The space S3 for accommodating the projector lens 71 and the projection conversion mirror 72 can be formed in each of the front bottom housing 74a and the rear bottom housing 74b.

[0247] The bottom housing 74 may have a fastening part that allows the lighting optical module 4 to be fastened by fastening members such as screws. An example of the fastening part may be a fastening boss. The fastening part may be formed in each of the front bottom housing 74a and the rear bottom housing 74b.

[0248] The mirror holder 75 can support the projection conversion mirror 72. The mirror holder 75 can be housed together with the projection conversion mirror 72 in the space S3 of the bottom housing 74. The mirror holder 75 can be an intermediate housing disposed between the front bottom housing 74a and the rear bottom housing 74b.

[0249] The top housing 76 can be combined with at least one of the bottom housing 74 and the mirror retainer 75. The top housing 76 can protect the concave mirror 73 on the upper side of the concave mirror 73. The top housing 76 can be mounted on the upper part of the concave mirror.

[0250] Figure 10 This is a perspective view showing the light-transmitting portion formed in the cover or top cover of this embodiment. Figure 11 This is a perspective view showing the light-transmitting portion of the image generation unit in this embodiment.

[0251] The illumination optical module 4 can be fixed to the projection optical module 7. The projection optical module 7 can be fixed to the back or side of at least one of the housing 1 and the top cover 11.

[0252] The projection optical module 7 may include a fastening body 74c that is fastened to at least one of the housing 1 and the top cover 11. The fastening body 74c may be formed in the bottom housing 74. The fastening body 74c may be formed in at least one of the front bottom housing 74a and the rear bottom housing 74b. The fastening body 74c may be fastened to at least one of the housing 1 and the top cover 11 by fastening members such as screws.

[0253] At least one of the housing 1 and the top cover 11 may have fastening portions 1d and 1e for securing the projection optical module 7 by fastening members such as screws. Examples of fastening portions 1d and 1e may be fastening bosses. A plurality of fastening portions 1d and 1e may be provided in the housing 1. The plurality of fastening portions 1d and 1e may include: a lower fastening portion 1d, protruding rearward from the lower part of the back surface of the housing 1; and an upper fastening portion 1e, protruding rearward from the upper part of the back surface of the housing 1. The lower fastening portion 1d and the upper fastening portion 1e may protrude from the peripheral body 1a of the housing 1.

[0254] At least one of the housing 1 and the top cover 11 may have a position determining part 1f that determines the position of the projection optical module 7. The position determining part 1f may be formed on the housing 1. The position determining part 1f may be spaced apart from the fastening parts 1d and 1e. The projection optical module 7 may be engaged in the position determining part 1f.

[0255] After being restricted and temporarily assembled by the positioning part 1f, the projection optical module 7 can be fastened to the fastening parts 1d and 1e by fastening components such as screws.

[0256] The image generation unit 3 may have a first light-transmitting portion 77 that allows image light to pass through. The first light-transmitting portion 77 may be formed in the projection optical module 7.

[0257] The image light D reflected from the concave mirror 73 can leak out to the outside of the projection optical module 7 through the first light transmission part 77.

[0258] The first light-transmitting portion 77 can be a light projection path that projects the image light D to the outside of the projection optical module 7. An example of the first light-transmitting portion 77 can be an opening through which the image light passes. The first light-transmitting portion 77 can be formed in at least one of the top housing 76 and the bottom housing 74, or it can be formed between the top housing 76 and the bottom housing 74.

[0259] The portion surrounding the first light-transmitting part 77 in the projection optical module 7 can be a light-shielding part.

[0260] The first light-transmitting portion 77 can be formed on the top housing 76, and the top housing 76 can have a light-transmitting portion 77 that allows the image light magnified by the concave mirror 73 to be projected onto the screen 21.

[0261] At least one of the cover 1 and the top cover 11 may have a second light-transmitting portion 11b that allows the image light D transmitted through the first light-transmitting portion 77 to pass through.

[0262] The second light-transmitting portion 11b can be a light inflow path that allows image light D to flow into the interior of the cover 1. An example of the second light-transmitting portion 11b can be an opening through which image light passes. The second light-transmitting portion 11b can be formed in at least one of the cover 1 and the top cover 11 or formed between the cover 1 and the top cover 11.

[0263] The portion around the second light-transmitting portion 11b in the cover 1 and the top cover 11 can be a light-blocking portion.

[0264] The image light D reflected from the concave mirror 73 can form a light crossover point inside the projection optical module 7. The light crossover point can be formed on the lower side of the concave mirror 73.

[0265] The size of the first light-transmitting part 77 can be larger than the size of the second light-transmitting part 11b.

[0266] Figure 12 This is a perspective view showing the head-up display of this embodiment. Figure 13 This is a side view of the head-up display in this embodiment.

[0267] The dust cover 12 may have one end 12a and another end 12b. One end 12a of the dust cover 12 may be the end of the dust cover 12 closest to the image generating unit 3. The other end 12b of the dust cover 12 may be the end of the dust cover 12 furthest from the image generating unit 3. There may be curvature between one end 12a and the other end 12b of the dust cover 12. The height of one end 12a of the dust cover 12 may be higher than the height of the other end 12b. One end 12a of the dust cover 12 may be located on the upper rear side of the dust cover 12. There may be a downward indentation between one end 12a and the other end 12b of the dust cover 12 to minimize back reflection of sunlight.

[0268] The dust cover 12 may include a near area 12c and a far area 12d.

[0269] The near region 12c can be the area in the dust cover 12 that is close to the image generating unit 3. The distance between the near region 12c and the image generating unit 3 can be shorter than the distance between the far region 12d and the image generating unit 3.

[0270] When the dust cover 12 is divided into two regions with the center line C1 as the reference, the near region 12c can be the region between the center line C1 and one end 12a of the dust cover 12.

[0271] The center line C1 of the dust cover 12 can be extended in the left and right directions.

[0272] The height of the near region 12c can be higher than the height of the far region 12d.

[0273] The distant region 12d can be the region in the dust cover 12 that is far from the image generation unit 3.

[0274] When the dust cover 12 is divided into two regions with the center line C1 as a reference, the far region 12d can be the region between the center line C1 and the other end 12b of the dust cover 12.

[0275] The upper end of the projection optical module 7 may be higher than the height of one end 12a of the dust cover 12. The upper end 76a of the top housing 76 may be higher than the height of one end 12a of the dust cover 12.

[0276] Figure 14 This is a perspective view showing the screen module of this embodiment. Figure 15 This is an exploded perspective view of the screen module in this embodiment. Figure 16 This is an enlarged view of the tilter in this embodiment. Figure 17This is a partial sectional perspective view of the movable bracket in this embodiment.

[0277] The screen module 2 may be provided with a tilting axis 26. The screen module 2 can be rotatably accommodated in the space S1 of the housing 1.

[0278] The screen module 2 can be tilted and accommodated in the space S1 of the housing 1 with the tilt axis 26 as the center. The screen module 2 can be configured horizontally or tilted in the space S1 of the housing 1.

[0279] Image light can be imaged on screen 21, and screen 21 can display an image. Screen 21 can have one end 21a and another end 21b. One end 21a of screen 21 can be the end of screen 21 closest to image generating unit 3. The other end 21b of screen 21 can be the end of screen 21 furthest from image generating unit 3. One end 21a and the other end 21b of screen 21 can be flat.

[0280] Screen 21 may include a near area 21c and a far area 21d.

[0281] The near region 21c can be the region on screen 21 that is close to the image generation unit 3. The distance between the near region 21c and the image generation unit 3 can be shorter than the distance between the far region 21d and the image generation unit 3.

[0282] When screen 21 is divided into two regions with the center line C2 as the reference, the near region 21c can be the region between the center line C2 and one end 21a.

[0283] The center line C2 of screen 21 can divide screen 21 into two parts along the front and back, and can be extended along the left and right directions.

[0284] In the near region 21c, the upper part of the image displayed through the windshield WS can be shown.

[0285] The far region 21d can be a region on screen 21 that is far from the image generation unit 3. The far region 21d can be farther from the image generation unit 3 than the inner region 21c.

[0286] When screen 21 is divided into two regions with the center line C2 as a reference, the far region 21d can be the region between the center line C2 and the other end 21b.

[0287] In the far region 21d, the lower part of the image displayed through the windshield WS can be shown.

[0288] A screen 21 can be mounted on the screen holder 22. The screen holder 22 can form a space to accommodate the screen 21.

[0289] The screen cover 23 can hold the screen 21 in place of the screen holder 22. The screen cover 23 may have a fastening portion that can be detachably engaged with the protrusion formed on the screen holder 22. The screen holder 22 may have a connector 25 connected to the tilter 8, and may have a tilting shaft 26 serving as the tilting center. The connector 25 may be formed on one side of the screen holder 22, and the tilting shaft 26 may be formed on the other side of the screen holder 22.

[0290] Connector 25 can be closer to near region 21c in near region 21c and far region 21d. Connector 25 can be rotatably connected to tilter 8. Connector 25 can be rotatably connected to movable bracket 84 of tilter 8. A hinge shaft 25a can be formed in connector 25.

[0291] The tilt axis 26 may be closer to the far region 21d in the near region 21c and the far region 21d. The tilt axis 26 may protrude from the screen holder 22. A pair of tilt axes 26 may be provided in the screen holder 22. The pair of tilt axes 26 may include a left tilt axis protruding from the left side of the screen holder 22 and a right tilt axis protruding from the right side of the screen holder 22.

[0292] Screen module 2 may include a spring 27 that elastically supports tilt axis 26. Spring 27 may surround tilt axis 26. Spring 27 may be provided in pairs. A pair of springs 27 may include a left spring that elastically supports the left tilt axis and a right spring that elastically supports the right tilt axis.

[0293] The housing 1 may be equipped with a shaft support 28 that supports the tilting shaft 26 so that it can rotate. The shaft support 28 may include a bracket 28a and a bearing 28b.

[0294] The bracket 28a can be installed on the housing 1. The bracket 28a can be accommodated in the space S1 of the housing 1. The bracket 28a can be fixed to the housing 1. A space for accommodating the bearing 28b can be formed in the bracket 28a. The bracket 28a can be a bearing housing for accommodating the bearing 28b.

[0295] Bearing 28b can be disposed on bracket 28a. Bearing 28b can support tilting shaft 26 between bracket 28a and tilting shaft 26 so that it can rotate.

[0296] The tilting shaft 26 can be inserted into the bearing 28b, which supports the tilting shaft 26 so that it can rotate.

[0297] A pair of shaft supports 28 may be provided. The pair of shaft supports 28 may include a left shaft support that supports the left tilted shaft to be rotatable and a right shaft support that supports the right tilted shaft to be rotatable.

[0298] One end 2a of the screen module 2 can be the end of the screen module 2 that is close to the concave mirror 73. The other end 2b of the screen module 2 can be the end of the screen module 2 that is away from the concave mirror 73.

[0299] The screen module 2 may include a near area NA with a connector 25 and a far area FA with a tilt axis 26.

[0300] The near region NA can be the area in screen module 2 that is close to the concave mirror 73. The distance between the near region NA and the concave mirror 73 can be shorter than the distance between the far region FA and the concave mirror 73.

[0301] When dividing the screen module 2 into two regions based on the center line, the near region NA can be the region behind the center line, and can include one end 2a of the screen module 2.

[0302] The distant region FA can be the area in screen 21 that is far from the concave mirror 73.

[0303] When dividing the screen module 2 into two regions based on the center line, the far region FA can be the region in front of the center line, and can include the other end 2b of the screen module 2.

[0304] The distance between the outermost contour of the near region NA and the concave mirror 73 can be shorter than the distance between the outermost contour of the far region FA and the concave mirror 73.

[0305] The head-up display may also include a tilter 8.

[0306] The tilter 8 can adjust the angle of the screen module 2. The tilter 8 can adjust the tilt angle of the screen module 2. The tilter 8 can be an angle adjuster for adjusting the angle of the screen module 2. The tilter 8 can tilt the screen module 2 around the tilt axis 26. The tilter 8 can tilt the screen 21 by tilting the screen module 2 around the tilt axis 26.

[0307] The tilter 8 may include a drive source 81 and a moving bracket 84.

[0308] The drive source 81 may include a motor 82 capable of linearly reciprocating the movable bracket 84. The motor 82 may provide a lead screw 83. The lead screw 83 may include a rotating rotor and a lifting rod that linearly reciprocates the rotor.

[0309] Drive source 81 can raise or lower the movable bracket 84. Drive source 81 can raise the movable bracket 84 to the upper height. Drive source 81 can lower the movable bracket 84 to the lower height.

[0310] The drive source 81 can raise and lower the lead screw 83 and the moving bracket 84 within a range of ±10mm.

[0311] The movable bracket 84 can move linearly by ±3mm.

[0312] The driver 81 can rotate the screen module 2 within a range of ±5°.

[0313] Screen module 2 can be tilted counterclockwise by a maximum of 5° with the horizontal line as the reference.

[0314] Screen module 2 can be tilted clockwise by a maximum of 5° with the horizontal line as the reference.

[0315] The tilt angle of screen module 2 can be within 10°.

[0316] Screen module 2 can be tilted by a maximum of 2° or a maximum of -2° relative to a reference plane. The reference plane can be the same as the horizontal plane.

[0317] If the drive source 81 causes the lead screw 83 to rise, the screen module 2 can tilt counterclockwise around the tilt axis 26, and the top surface of the screen 21 can face the front and upper side.

[0318] If the drive source 81 causes the lead screw 83 to descend, the screen module 2 can tilt clockwise around the tilt axis 26, and the top surface of the screen 21 can face the rear and upper side.

[0319] Control board 14 (reference) Figure 4 The motor can be controlled to raise or lower the movable bracket 84 to a set height after the movable bracket 84 is at a reference height.

[0320] When driven by the drive source 81, the movable bracket 84 can rotate the screen module 2.

[0321] The movable bracket 84 can be connected to the drive source 81 and transmit the driving force of the drive source 81 to the screen holder 22.

[0322] The movable bracket 84 can be connected to the lead screw of the motor 82. The movable bracket 84 may also include: an outer bracket 85, which is connected to the lead screw 83 of the motor 82; and an inner bracket 86, which has a contact end that contacts the connector 25.

[0323] The outer bracket 85 may have a space for accommodating the inner bracket 86. The outer bracket 85 may also have a rotatable receiving body 85a for accommodating the hinge shaft 25a of the connector 25.

[0324] The receiving body 85a can be formed in the lower part of the outer bracket 85. The receiving body 85a can support the hinge shaft 25a so that it can rotate.

[0325] The outer bracket 85 may have a fastening part 85b for fastening the lead screw 83 with fastening components such as pins or screws.

[0326] The inner bracket 86 can be disposed on the outer bracket 85 and contact the connector 25. The inner bracket 86 can be configured to move along the length of the outer bracket 84 within the outer bracket 85.

[0327] The inner bracket 86 may include a rod 86a and a contact body 86b.

[0328] Rod 86a can be configured inside the outer bracket 85.

[0329] The contact body 86b can protrude from the lower end of the rod 86a and can contact the connector 25. A contact end that contacts the connector 25 can be formed on the bottom surface of the contact body 86b.

[0330] The movable bracket 84 may also include a spring 87, which is disposed on the outer bracket 85 and elastically supports the inner bracket 86.

[0331] Spring 87 can be accommodated in the space formed inside the outer bracket 85, and can elastically support the inner bracket 86. Spring 87 can press the rod 86a downward, so that the contact body 86b is always in contact with the hinge axis 25a of the connector 25.

[0332] The connector 25 and the movable bracket 84 can maintain high reliability without arbitrarily disengaging, thanks to the inner bracket 86 and the spring 87.

[0333] The control board 14 can change the position of the eye box by controlling the motor 82.

[0334] The eye box serves as an effective area to ensure optical performance. It provides a region where the occupant can reliably recognize the virtual image (FI) formed by the head-up display. If the occupant's eyes are positioned within the eye box, they can reliably recognize the virtual image formed by the head-up display.

[0335] In the case of a short passenger, the position (i.e., height) of the eye box is preferably low, and in the case of a tall passenger, the position (i.e., height) of the eye box is preferably high.

[0336] The control board 14 can change the position of the eye box EB according to the adjustment displacement of the movable bracket 84.

[0337] If the movable bracket 84 rises to a height higher than the reference height, the height of the virtual image FI in front of the windshield WS can be lowered, and the eye box EB can be lowered.

[0338] If the movable bracket 84 descends to a height lower than the reference height, the height of the virtual image FI in front of the windshield WS can be increased, and the eye box EB can be increased.

[0339] In order to lower the eye box EB, the control board 14 can control the motor 82 in an upward mode.

[0340] To improve the eye box EB, the control board 14 can control the motor 82 in an upward mode.

[0341] Figure 18 This is a cross-sectional view of the screen in this embodiment.

[0342] Figure 18 (a) is a diagram showing the first example of the screen.

[0343] A Fresnel pattern can be formed on screen 21. The Fresnel pattern can be anisotropic micro-Fresnel pattern.

[0344] The first example of screen 21 may include Fresnel lens 100, reflector 110 and diffuser 120.

[0345] The Fresnel lens 100 can have the same function as a convex lens, can be a lens with reduced thickness than a typical convex lens, and can be an optical component with continuous concentric grooves formed in plastic.

[0346] A Fresnel pattern can be formed on the bottom surface of the Fresnel lens 100.

[0347] Fresnel patterns can be formed sequentially with a plurality of concentric grooves of different sizes, and can be formed into a shape corresponding to the curvature of the windshield WS.

[0348] The Fresnel lens 100 may include a substrate 102 and a Fresnel layer 104 formed on the bottom surface of the substrate 102.

[0349] The substrate 102 can be made of plastic.

[0350] Fresnel patterns can be formed in Fresnel layer 104.

[0351] Peaks 105 and valleys 106 can be alternately formed on the bottom surface of Fresnel layer 104.

[0352] The multiple concentric grooves that make up the Fresnel pattern can be formed by alternating peaks 105 and valleys 106.

[0353] Peak 105 can be formed such that its size gradually decreases as it approaches the lower side. Peak 105 can be inverted triangular in shape.

[0354] Peak 105 may include a first surface 105a and a second surface 105a.

[0355] The first surface 105a can be an inclined surface. The second surface 105b can be an inclined surface or a vertical surface.

[0356] When both the first surface 105a and the second surface 105b are inclined surfaces, the first surface 105a can be a surface with a gentle inclination, and the second surface 105b can be a surface with a steep inclination.

[0357] The first surface 105a and the second surface 105b can be formed alternately.

[0358] Valley 106 can be formed such that its size gradually decreases as it approaches the upper side.

[0359] The reflecting mirror 110 can be formed on the bottom surface of the Fresnel lens 100. The reflecting mirror 110 can be formed on a Fresnel pattern. The reflecting mirror 110 can be formed on the first surface 105a.

[0360] The reflecting mirror 110 can be formed by a mirror coating. The reflecting mirror 110 can be a mirror coating layer formed on the first surface 105a. The reflecting mirror 110 can be tilted relative to the vertical surface.

[0361] A diffuser 120 may be formed on the top surface of the Fresnel lens 100. The diffuser 120 may be formed from a diffusion layer formed on the top surface of the Fresnel lens 100. The diffusion layer may be formed on the top surface of the substrate 102. The diffuser 120 may include a diffusion pattern.

[0362] The Fresnel lens 100 may also include an absorption layer 130.

[0363] The absorption layer 130 can be a light-absorbing layer. The absorption layer 130 can be formed on the second surface 105b.

[0364] The absorption layer 130 can be formed alternately with the mirror coating layer.

[0365] Image light D can pass through diffuser 120 and Fresnel lens 100 in sequence and can be reflected by mirror 110. Image light D reflected by mirror 110 can be imaged in diffuser 120 after passing through Fresnel lens 100.

[0366] Figure 18 (b) is a diagram showing the second example of the screen.

[0367] like Figure 18 As shown in (b), the second example of the screen may include a Fresnel lens 100, a reflective mirror 110, and a diffuser 120, and may also include an absorption layer 130' for absorbing light.

[0368] The Fresnel lens 100 may be the same as or similar to the Fresnel lens 100 in the first example on the screen. To avoid repetitive description, the same reference numerals are used and the description of it is omitted.

[0369] The reflector 110 may be the same as or similar to the reflector 110 in the first example of the screen. To avoid repetitive description, the same reference numerals are used and the description of it is omitted.

[0370] The diffuser 120 may be the same as or similar to the diffuser 120 in the first example on the screen. To avoid repetitive description, the same reference numerals are used and the description of it is omitted.

[0371] An absorption layer 130' may be formed on the bottom surface of the Fresnel lens 100. The absorption layer 130' may be formed at the lower end of the Fresnel lens 100. The absorption layer 130' may contact the lower ends of a plurality of peaks 105. The absorption layer 130' may contact the lower ends of each of the plurality of peaks 105, and may be in a shape connecting the lower ends of the plurality of peaks 105.

[0372] The absorption layer 130' can shield peak 105 and valley 106. The absorption layer 130' can be formed in parallel with the diffuser 120.

[0373] A hollow space can be formed between the absorption layer 130' and the Fresnel lens 100.

[0374] Figure 18 (c) is a diagram showing the third example of the screen.

[0375] like Figure 18 As shown in (c), the third example of the screen may include: a Fresnel lens 100 with a Fresnel pattern formed on its bottom surface; a reflective mirror 100 formed on the Fresnel pattern; a diffuser 120 formed on the top surface of the Fresnel lens 100; and an absorption layer 130' for absorbing light.

[0376] The Fresnel lens 100 may include: a substrate 102; and a Fresnel layer 104 formed on the bottom surface of the substrate 102, having a Fresnel pattern. The Fresnel lens 100 may be the same as or similar to the Fresnel lens 100 in the first example of the screen. To avoid repetitive description, the same reference numerals are used and the description of it is omitted.

[0377] The reflector 110 is the same as or similar to the reflector 110 in the first example of the screen. To avoid repetitive description, the same reference numerals are used and the description of it is omitted.

[0378] The diffuser 120' may include a diffuser substrate 122 and a diffusion layer 124.

[0379] The diffuser substrate 122 can be bonded to the top surface of the substrate 102 by adhesive 126.

[0380] The diffusion layer 124 can be formed on the top surface of the diffuser substrate 122.

[0381] The absorption layer 130' may be the same as or similar to the absorption layer 130 of the first example of the screen or the absorption layer 130' of the second example of the screen. In order to avoid repetitive description, the same reference numeral as the absorption layer 130' of the second example of the screen is used and the description of it is omitted.

[0382] Figure 19 This is a rear view of the screen showing this embodiment.

[0383] The center C3 of screen 21 can be offset from the center C4 of Fresnel pattern F.

[0384] The center C3 of screen 21 can be the center of the active area where the image light D is focused on screen 21. The bezel of screen 21 can be covered by screen cover 23. The image light D can be focused on the inner area of ​​the bezel of screen 21, or it can be not focused on the bezel of screen 21.

[0385] Screen 21 may include: an active area, in which image light D is focused; and an inactive area, in which image light D is not focused.

[0386] The active area can be the area of ​​screen 21 that is not covered by screen cover 23. The active area can also be the area that can be observed through the opening 23a of screen cover 23.

[0387] The inactive area can be the area on screen 21 that is covered by screen cover 23.

[0388] The center C4 of the Fresnel pattern F can be the center of the concentric circles P1, P2, P3, P4, P5, P6, P7, P8, P9, and P10 that constitute the Fresnel pattern F.

[0389] The radius of the horizontal axis (X-axis) and the vertical axis (Y-axis) of a Fresnel pattern F can be different. The horizontal axis (X-axis) can be extended in the left-right direction, and the vertical axis (Y-axis) can be extended in the front-back direction.

[0390] In each of the concentric circles P1, P2, P3, P4, P5, P6, P7, P8, P9, and P10, the radius RH of the horizontal axis (X-axis) and the radius RV of the vertical axis (Y-axis) can be different. The radius RH of the horizontal axis (X-axis) can be greater than the radius RV of the vertical axis (Y-axis).

[0391] The distance L between the center C3 of the active area and the horizontal axis (X-axis) of the Fresnel pattern F can be greater than half of the vertical length H of the active area, H / 2.

[0392] When the spacing distance L is half of the longitudinal length H of the active area (H / 2), the offset can be defined as 100%. The spacing distance L can be greater than half of the longitudinal length H of the active area (H / 2) so that the offset exceeds 100%.

[0393] The center C3 of the active area can be separated from the vertical axis (Y-axis) of the Fresnel pattern F.

[0394] The windshield WS can have curvature in both the vertical and horizontal directions.

[0395] The Fresnel pattern F on screen 21 can be formed corresponding to the curvature of the windshield WS. The curvature of the Fresnel pattern F can have a tendency opposite to that of the curvature of the windshield WS. The curvature of the Fresnel pattern F can be inversely proportional to the curvature of the windshield WS.

[0396] As the horizontal curvature of the windshield WS increases, the horizontal curvature of the Fresnel pattern F can decrease. That is, the ratio RH / RV of the radius of the horizontal axis (X-axis) and the radius of the vertical axis (Y-axis) can increase. As the horizontal curvature of the windshield WS increases, the radius RH of the horizontal axis (X-axis) of the Fresnel pattern F can increase.

[0397] Conversely, as the horizontal curvature of the windshield WS decreases, the horizontal curvature of the Fresnel pattern F can increase. That is, the ratio of the radius RH on the horizontal axis (X-axis) to the radius RV on the vertical axis (Y-axis) RH / RV can decrease. As the horizontal curvature of the windshield WS decreases, the radius RH on the horizontal axis (X-axis) of the Fresnel pattern F can decrease.

[0398] As the vertical curvature of the windshield WS increases, the vertical curvature of the Fresnel pattern F can decrease. That is, the ratio of the radius RH on the horizontal axis (X-axis) to the radius RV on the vertical axis (Y-axis) RH / RV can decrease. As the vertical curvature of the windshield WS increases, the radius RV on the vertical axis (Y-axis) can increase.

[0399] Conversely, as the vertical curvature of the windshield WS decreases, the vertical curvature of the Fresnel pattern F can increase. That is, the ratio RH / RV of the horizontal axis (X-axis) and the vertical axis (Y-axis) radius can increase. As the vertical curvature of the windshield WS decreases, the vertical axis (Y-axis) radius RV can decrease.

[0400] When the head-up display is a left-side head-up display located on the left side of the dashboard, the center C3 of the active area in screen 21 can be offset to the right relative to the center C4 of the Fresnel pattern F. In this case, the center C3 of the active area can be located to the right of the vertical axis (Y-axis) of the Fresnel pattern F.

[0401] That is, the center (c) of the active area in the screen 21 of the left head-up display can be offset to the right based on the center C4 of the Fresnel pattern F.

[0402] Conversely, the Fresnel pattern F of the screen 21, which is included in the left head-up display with reference to the center C3 of the active area, can be shifted to the left.

[0403] When the head-up display is a right-side head-up display located on the right side of the dashboard, the center C3 of the active area in screen 21 can be offset to the left relative to the center C4 of the Fresnel pattern F. In this case, the center C3 of the active area can be located to the left of the vertical axis (Y-axis) of the Fresnel pattern F.

[0404] That is, the center C3 of the effective area of ​​the screen 21 included in the right head-up display can be offset to the left based on the center C4 of the Fresnel pattern F.

[0405] Conversely, the Fresnel pattern F of the screen 21, which is included in the right-side head-up display with reference to the center C3 of the active area, can be shifted to the right.

[0406] As the horizontal curvature of the windshield WS increases, the offset dimension (i.e., the offset amount) can increase. As the horizontal curvature of the windshield WS increases, the center C3 of the active area in the screen 21 can be offset further from the vertical axis (Y-axis).

[0407] The near region 21c of screen 21 can be separated from the horizontal axis (X-axis) of the Fresnel pattern F. The near region 21c of screen 21 can be separated from the horizontal axis (X-axis) of the Fresnel pattern F in the front-back direction.

[0408] The center C3 of the effective region can be separated from the vertical axis (Y-axis) of the Fresnel pattern F.

[0409] Figure 20 This is a cross-sectional view of the Fresnel layer of the screen in this embodiment.

[0410] The pitch of the Fresnel pattern F can be in the range of 50 μm to 150 μm.

[0411] The angle of the first face 105a of the Fresnel pattern F can gradually increase as it moves from the near region 21c to the far region 21d. The angle of the first face 105a in the far region 21d can be greater than the angle of the first face 105a in the near region 21c.

[0412] The Fresnel pattern F can have the same pitch, and the valley depth G1 of the near region 21c can be different from the valley depth G2 of the far region 21d. When the Fresnel pattern F has the same pitch, the valley depth G2 of the far region 21d can be greater than the valley depth G1 of the near region 21c. When the Fresnel pattern F has the same pitch, the valley depth of the Fresnel pattern F can gradually increase as it moves from the near region 21c towards the far region 21d.

[0413] The valley depths of the Fresnel pattern F can be the same, and the spacing of the near region 21c can differ from the spacing of the far region 21d. When the valley depths of the Fresnel pattern F are the same, the pitch of the far region 21d can be smaller than the pitch of the near region 21c. When the valley depths of the Fresnel pattern F are the same, the spacing of the Fresnel pattern F can gradually decrease as it moves from the near region 21c closer to the far region 21d.

[0414] Figure 21 This is a perspective view showing a modified example of a heads-up display according to this embodiment. Figure 22 This is a perspective view showing the interior of a modified example of the head-up display of this embodiment. Figure 23 This is a schematic diagram showing a modified example of a head-up display according to this embodiment.

[0415] Another example of a head-up display may include: a housing 1'; a screen module 2 housed in the housing 1'; a top cover 11 disposed on the upper side of the housing 1'; a dust cover 12 disposed on the top cover 11; and an image generation unit 3 disposed on one side of at least one of the housing 1' and the top cover 11.

[0416] The left-right length of the cover 1' can be longer than the left-right length of the cover 1 included in the head-up display example.

[0417] Screen module 2 may include screen 21'.

[0418] Image light D can be imaged on screen 21', and screen 21' can reflect image light D onto the windshield.

[0419] The screen 21' can have a directional anisotropic micro-Fresnel pattern or a diffuse pattern.

[0420] Screen module 2 may be the same as or similar to screen module 2 in a head-up display example. To avoid repetitive descriptions, the same reference numerals are used and detailed descriptions are omitted.

[0421] The left-right length of screen module 2 can be longer than the left-right length of screen module 2 included in the head-up display example.

[0422] The image generation unit 3 can be in an overall "L" shape.

[0423] The image generation unit 3 can be a side image generation unit configured on one side of the cover 1' or one side of the top cover 11 and the lower side of the cover 1', which can project image light D toward the screen 21' of the screen module 2.

[0424] The image generation unit 3 may include: an illumination optics module 4, which generates and illuminates light; an image generator 6, which receives the illuminated light from the illumination optics module 4 and generates an image light D; and a projection optics module 7', which projects the image light D generated by the image generator 6 onto the screen module 2.

[0425] The illumination optics module 4 and the image generator 6 can be configured on the underside of the housing 1'.

[0426] The illumination optical module 4 may be the same as or similar to the illumination optical module 4 of a head-up display. To avoid repetitive descriptions, the same reference numerals are used and detailed descriptions of it are omitted.

[0427] Image generator 6 may be the same as or similar to image generator 6 in an example of a head-up display. To avoid repetitive descriptions, the same reference numerals are used and detailed descriptions of it are omitted.

[0428] The projection optical module 7' may include: at least one projector lens 71; a projection conversion mirror 72 that reflects the image light transmitted through the projector lens 71 upwards; and a concave mirror 73 that magnifies the image light reflected from the projection conversion mirror 72 to the screen module 2.

[0429] The projection optical module 7' can be an overall "L" shape.

[0430] The projector lens 71 can be configured on the underside of the housing 1'.

[0431] The projection conversion mirror 72 can be positioned next to the projector lens 71. The projection conversion mirror 72 can be spaced apart from the projector lens 71 in the left-right direction.

[0432] The concave mirror 73 can be configured on the upper side of the projection conversion mirror 72. The concave mirror 73 can be configured next to the cover 1' or the top cover 11, and can project image light D onto the screen 21'.

[0433] Head-up displays can be configured as ultra-wide hove screens (EWHS).

[0434] Figure 24 This is a control block diagram of the head-up display in this embodiment.

[0435] The head-up display may also include an illuminance sensor 200 for sensing the illuminance of the vehicle interior. The illuminance sensor 200 may be an external illuminance sensor disposed outside the head-up display. The illuminance sensor 200 may be installed on the dashboard, etc. The illuminance sensor 200 may be connected to the control board 14 via a signal line. The illuminance sensor 200 can sense the illuminance and transmit a signal based on the sensed value to the control board 14.

[0436] If the control board 14 receives a signal from the illuminance sensor 200, it can change at least one of the brightness and color of the image generation unit 3 or 3'. The image generation unit 3 or 3' can control a plurality of light sources 41, 42, 43.

[0437] The control board 14 can receive driver information and control the motor 82 of the tilter 8 based on the received information.

[0438] The head-up display may include a sensor 210 for sensing the driver's eyes. Sensor 210 may be an optical sensor. An example of sensor 210 may be a camera sensor.

[0439] Driver information can be obtained by sensor 210, which can transmit the sensed value to control board 14. If a signal is received from sensor 210, control board 14 can receive driver information.

[0440] If the driver's eye height received from sensor 210 is lower than the reference eye height, the control board 14 can control motor 82 to rise, and the moving bracket 84 can rise.

[0441] If the driver's eye height received from sensor 210 is higher than the reference eye height, the control board 14 can control motor 82 to enter descent mode, and the moving bracket 84 can descend.

[0442] The head-up display may also include a memory 220 that stores the pattern preceding the power-off event when the power is off. The memory 220 may be located on the control board 14.

[0443] If power is applied again after the power is turned off, the control board 14 can compare the mode stored in the memory 220 with the mode based on the driver information, and control the motor 82 of the tilter 8 according to the comparison result.

[0444] The control board 14 may include a control unit 300.

[0445] The control unit 300 may also include a main control unit 302 that controls the image generation unit 3.

[0446] The main control unit 302 can control a plurality of light sources 41, 42, 43 and image generator 6.

[0447] The main control unit 302 can change at least one of the brightness and color of the image generation unit 3 based on the sensing value of the illuminance sensor 200.

[0448] The main control unit 302 can control a plurality of light sources 41, 42, and 43 based on the sensing value of the illuminance sensor 200.

[0449] The control unit 300 may also include a tilter control unit 304 for controlling the tilter 8.

[0450] The tilter control unit 304 can control the motor 82 of the tilter 8.

[0451] The control unit 300 may further include an AR control unit (Augmented Reality Control unit) 306 for adding virtual graphics to an image. The AR control unit 306 can send signals to the main control unit 302, which can control the addition of virtual graphics to the image by controlling a plurality of light sources 41, 42, 43 and the image generator 6.

[0452] The above description is merely an exemplary illustration of the technical concept of the present invention. For those skilled in the art, various modifications and variations can be made without departing from the essential characteristics of the present invention.

[0453] Therefore, the embodiments disclosed in this invention are not intended to limit the technical concept of this invention, but are intended to illustrate it. These embodiments do not limit the scope of the technical concept of this invention.

[0454] The scope of protection of this invention should be interpreted through the following claims, and all technical concepts within the same scope should be interpreted as being included within the scope of the claims of this invention.

Claims

1. A head-up display, wherein, comprises: an illumination optical module including a plurality of light sources; an image generator receiving light generated from the plurality of light sources and generating image light; and a heat dissipation mechanism dissipating heat of the illumination optical module and the image generator; the heat dissipation mechanism comprises: an illumination heat dissipation unit dissipating heat of the plurality of light sources; and an image generator heat dissipation unit dissipating heat of the image generator; the illumination heat dissipation unit comprises: a first heat dissipation unit dissipating heat of at least one light source of the plurality of light sources; and a second heat dissipation unit dissipating heat of another light source of the plurality of light sources. further comprises:

2. The head-up display of claim 1, wherein, a cover; and a screen accommodated in the cover; the first heat dissipation unit comprises: a heat dissipation connector in thermal contact with a first light source and a second light source of the plurality of light sources, respectively, and in thermal contact with the cover; and a first heat sink in thermal contact with the heat dissipation connector.

3. The head-up display according to claim 2, wherein the first light source is a red light source irradiating red light; the second light source is a green light source irradiating green light.

4. The head-up display according to claim 2, wherein the first heat dissipation unit further comprises: a first thermal pad disposed between the first light source and the heat dissipation connector; a second thermal pad disposed between the second light source and the heat dissipation connector; and a third thermal pad disposed between the heat dissipation connector and the first heat sink.

5. The head-up display according to claim 4, wherein the heat dissipation connector comprises: a thermal contact body in contact with each of the first thermal pad, the second thermal pad, and the third thermal pad; a cover contact body in contact with the cover; and a connection body connecting the thermal contact body and the cover contact body.

6. The head-up display according to claim 5, wherein the first heat dissipation unit further comprises a cover plate covering the cover contact body.

7. The head-up display according to claim 2, wherein the second heat dissipation unit comprises a second heat sink in thermal contact with a third light source of the plurality of light sources.

8. The head-up display according to claim 7, wherein the third light source is a blue light source irradiating blue light; a size of the second heat sink is smaller than a size of the first heat sink.

9. The head-up display according to claim 7, wherein the second heat dissipation unit further comprises a thermal pad disposed between the third light source and the second heat sink.

10. The head-up display according to claim 1, wherein a light irradiation direction of at least one light source of the plurality of light sources is different from a light irradiation direction of another light source of the plurality of light sources.

11. The head-up display according to claim 1, wherein the image generator heat dissipation unit comprises a heat sink in thermal contact with the image generator.

12. The head-up display according to claim 1, wherein the image generator heat dissipation unit further comprises a thermal pad disposed between the image generator and the heat sink.

13. The head-up display according to claim 1, wherein the illumination optical module further comprises: ​ ​ a base formed with a space; a cover covering the space; a plurality of optical devices guiding light emitted from a plurality of light sources to the image generator; a prism allowing light transmitted through the plurality of optical devices to be transmitted to the image generator and reflecting image light generated from the image generator; and a holder fixing the prism to at least one of the base and the cover; the plurality of optical devices, the prism, the holder, and the image generator are accommodated in the space.

14. The head-up display according to claim 13, wherein the plurality of light sources are disposed in the base.

15. The head-up display according to claim 13, wherein the illumination heat dissipation unit and the image generator heat dissipation unit are disposed outside the base.

Images