Panoramic head-up display

Abstract

A panoramic head-up display comprises a reflecting mirror arranged on an instrument desk and a plurality of flat panel display modules located below the reflecting mirror. The reflecting mirror extends between the left side edge and the right side edge of the instrument desk, a mirror base fixed to the instrument desk is arranged behind the reflecting mirror, a transparent protective cover for supporting is arranged in front of the reflecting mirror, the reflecting face of the reflecting mirror has low reflectivity, light rays of the instrument desk are prevented from being reflected, the reflecting mirror can absorb the light rays penetrating through the reflecting face of the reflecting mirror, double images are avoided, and the reflecting effect is good. Each flat panel display module projects an image light beam to the reflector, and the reflector reflects the image light beam to the eyes of a viewer.

Description

TECHNICAL FIELD

[0001] The present invention relates to a head-up display, in particular to a panoramic head-up display which uses the light shielding region of the lower edge of the windshield as a reflecting mirror to provide a display effect similar to or better than the prior art curved display from the left A-pillar to the right A-pillar. BACKGROUND

[0002] The windshield of a vehicle is fixed to the vehicle body by adhesive tape and sealant. With time and exposure to the sun and wind, the windshield 6 will inevitably age. Therefore, a light shielding region is provided around the periphery of the windshield 6. The light shielding region is formed by a ceramic sintering technology, which is a glass structure similar to ceramic, i.e. a dark glaze is fired onto the glass. As shown in Figure 1A and 1B The black light shielding region LSR is positioned to cover the adhesive tape and sealant, blocking direct sunlight, preventing the adhesive tape and sealant from aging, and avoiding direct sunlight from causing the adhesive tape and sealant to deteriorate prematurely, thereby maintaining the service life of the adhesive tape and sealant.

[0003] In addition to preventing the adhesive tape and sealant from aging, the prior art can also expand the area of the light shielding region LSR between the left A-pillar L-AP and the right A-pillar R-AP of the lower edge of the windshield 6 without blocking the required downward viewing angle θd, as shown in Figure 2A and 2B The curved display panel CDP is formed by extending from the left A-pillar L-AP to the right A-pillar R-AP of the vehicle to form a panoramic display, providing the driver and passengers with information about the vehicle status, navigation instructions, or other information. However, the curved display panel CDP is expensive and difficult to introduce widely to various vehicle models.

[0004] Another prior art panoramic head-up display uses the light shielding region LSR of the lower edge of the windshield 6 as a reflecting mirror, as shown in Figure 3A A flat display module 3 is provided below the light shielding region LSR. The flat display module 3 projects an image beam D onto the light shielding region LSR, which reflects the image beam D to the eyes E of the driver or passengers, so that the eyes E can visually see the image virtual image VI behind the light shielding region LSR of the windshield 6. In this way, the panoramic head-up display does not need to use an expensive curved display panel, but can provide vehicle status, navigation instructions, or other information, as shown in Figure 3B

[0005] ​The aforementioned design of the panoramic head-up display is feasible for the windshield of a general sedan, because as shown in Figure 3A the windshield 6 of a general sedan has an angle θw of about 30 degrees with the instrument desk ID. However, for the windshield 6 of a sports car as shown in Figure 3C the windshield 6 has a smaller angle θw with the instrument desk ID, for example, about 20 degrees, and thus it is difficult for the image light beams D projected by the planar display modules 3 below the light shielding area LSR to be reflected via the light shielding area LSR to the eyes E of the viewer, and if the planar display modules 3 are adjusted to positions where the image light beams D can be reflected to the eyes E of the viewer via the light shielding area LSR, the planar display modules 3 will interfere with the firewall, and the up-and-down viewing angle is small. SUMMARY

[0006] To overcome the problems of the prior art, the purpose of the present application is to provide a panoramic head-up display which not only can use a mirror to replace the light shielding area at the lower edge of the windshield as a reflecting element for reflecting image light beams to the eyes of the viewer, so as to adapt to various vehicles, but also can provide a display effect similar to or better than that of a curved panoramic display.

[0007] According to an embodiment of the present application, a panoramic head-up display is adapted to be arranged on an instrument desk, and comprises: a mirror arranged on the upper surface of the instrument desk and extending between the left and right side edges of the instrument desk, the front surface of the mirror facing the viewer has an angle smaller than 90 degrees with the upper surface of the instrument desk; a mirror seat arranged on the instrument desk and used to fix the mirror on the instrument desk; a transparent protective cover arranged on the side of the mirror close to the viewer, the upper edge of the transparent protective cover is engaged with the mirror seat, and the lower edge of the transparent protective cover is fixed on the instrument desk to support the mirror seat; and a plurality of planar display modules arranged below the mirror and used to respectively project an image light beam to the mirror, the mirror reflects the image light beams projected by the planar display modules to the eyes of the viewer, so as to visually form a plurality of image virtual images behind the mirror.

[0008] Thus, the panoramic head-up display provided by the present application can reduce manufacturing cost and be well adapted to various vehicles.

[0009] Optionally, the mirror comprises a plurality of reflecting elements adjacent to each other.

[0010] Optionally, the rear surface of the mirror opposite to the front surface is provided with a dark light-absorbing layer.

[0011] Optionally, the deep color light-absorbing layer has a refractive index that is the same as or similar to the refractive index of the material of the mirror.

[0012] Optionally, the color of the material of the mirror is dark.

[0013] Optionally, the deep color light-absorbing layer is black paint, dark blue paint, dark green paint, or paint of other dark color.

[0014] Optionally, the front surface of the mirror is curved.

[0015] Optionally, the material of the mirror is a material that can partially reflect and partially transmit light.

[0016] Optionally, the reflectivity of the front surface of the mirror to the image light beam is less than 40%.

[0017] Optionally, the front surface of the mirror is provided with a low reflectivity material layer, and the reflectivity of the low reflectivity material layer to the image light beam is less than 40%. Alternatively, the material of the mirror has a refractive index of 1.4-1.9 to visible light, and the incident angle of the image light beam to the front surface of the mirror is greater than 0 degrees but less than 70 degrees.

[0018] Optionally, the mirror seat is opaque, and the outer surface of the mirror seat has light extinction properties.

[0019] Optionally, the material of the transparent protective cover is a material that allows most (for example, but not limited to, more than 80%) of the image light beam to pass through, such as but not limited to transparent glass or plastic.

[0020] Optionally, the transparent protective cover comprises a plurality of transparent cover elements that are adjacent to each other.

[0021] Optionally, the flat display modules are arranged in the recesses of the instrument panel.

[0022] Optionally, the angle between the display surface of the flat display module and a horizontal plane is greater than or equal to 0 degrees but less than 10 degrees.

[0023] Optionally, the flat display module comprises a flat display panel for displaying an image and a directional backlight module comprising a backlight source array for projecting a directional backlight light beam that passes through the flat display panel to form the image light beam.

[0024] Optionally, the transverse diffusion angle of the directional backlight light beam is greater than the longitudinal diffusion angle.

[0025] Optionally, the transverse diffusion angle is more than three times greater than the longitudinal diffusion angle.

[0026] Optionally, the orientation of the directional backlight module is adjustable.

[0027] Optionally, the orientation of the directional backlight module is adjustable in conjunction with the orientation of the flat display panel.

[0028] Optionally, the flat display panels of the flat display modules are spaced apart from each other.

[0029] Optionally, the flat display panels of the flat display modules are not aligned in parallel with each other. BRIEF DESCRIPTION OF DRAWINGS

[0030] Other aspects of the application will become apparent upon reading the detailed description in conjunction with the drawings.

[0031] Figure 1A and 1B is a schematic diagram of a prior art windshield;

[0032] Figure 2A and 2B is a schematic diagram of a prior art panoramic display using curved display panels at different viewing angles;

[0033] Figure 3A and 3B is a schematic diagram of a prior art panoramic head-up display using light-avoiding area reflection applied to a general vehicle at different viewing angles;

[0034] Figure 3C is a schematic diagram of a prior art panoramic head-up display using light-avoiding area reflection applied to a sports car;

[0035] Figure 4A and 4B is a schematic diagram of a panoramic head-up display according to an embodiment of the present application installed in a vehicle at different viewing angles;

[0036] Figure 4C and 4D is a schematic diagram of the structure of a mirror according to different embodiments of the present application;

[0037] Figure 5A is a schematic diagram of an example of the light path when an image beam is projected on a mirror;

[0038] Figure 5B is a graph of the reflectivity of a mirror according to the present application versus the incident angle of an image beam;

[0039] Figure 6A is a schematic diagram of a flat display module according to the present application installed in an instrument panel;

[0040] Figure 6B is a schematic diagram of the structure of a flat display module according to the present application;

[0041] Figure 6C Fig. 1 is a schematic diagram of the arrangement of the flat display module of the present application;

[0042] Figure 6D and 6E Fig. 2 is a schematic diagram of the position and angle of the flat display module of the present application;

[0043] Figure 7A 、 7B Fig. 3 is a schematic diagram of the directional backlight module of the display module of the present application when projecting a directional backlight beam;

[0044] Figures 8A-8C Fig. 4 is a schematic diagram of the ring-shaped head-up display when adjusting the projection angle according to the eyes of the viewer; and

[0045] Figures 9A-9C Fig. 5 is another schematic diagram of the ring-shaped head-up display when adjusting the projection angle according to the eyes of the viewer.

[0046] Explanation of the symbols in the drawings:

[0047] 1: mirror

[0048] 11: front surface

[0049] 12: back surface

[0050] 13: dark light-absorbing layer

[0051] 3: flat display module

[0052] 31: flat display panel

[0053] 311: display surface

[0054] 32: directional backlight module

[0055] 321: LED

[0056] 4: mirror holder

[0057] 41: outer surface

[0058] 5: transparent protective cover

[0059] 6: windshield

[0060] a: lateral diffusion angle

[0061] b: longitudinal diffusion angle

[0062] A: lateral diffusion angle

[0063] B: longitudinal diffusion angle

[0064] BL: backlight beamlet

[0065] CDP: curved display panel

[0066] D: image beam

[0067] D_2: image beam

[0068] D_3: image beam

[0069] D_4: image beam

[0070] E: eye

[0071] E1: eye

[0072] E2: eye

[0073] E3: eye

[0074] L: directional backlight beam

[0075] L-AP: left A-pillar

[0076] LSR: light-shielded region

[0077] ID: instrument panel

[0078] ID_rc: recess

[0079] R-AP: right A-pillar

[0080] RM: reflective element

[0081] Rs: S-wave reflectivity

[0082] Rp: P-wave reflectivity

[0083] VI: image virtual image

[0084] θd: downward angle of view

[0085] θi: angle of incidence

[0086] θm: included angle

[0087] θw: included angle DETAILED DESCRIPTION

[0088] Please refer to Figures 4A to 7F to solve the problem of the small included angle between the windshield 6 and the instrument panel ID, the present application provides a panoramic head-up display, which comprises a mirror 1 and a plurality of flat display modules 3 (for example, but not limited to 3 flat display modules 3).

[0089] As Figure 4A , 4BAs shown, the mirror 1 is disposed on an instrument panel ID of the vehicle, and the angle between the mirror 1 and the horizontal plane can be customized according to the vehicle model. The angle θm between the front surface 11 of the mirror 1 facing the viewer and the instrument panel ID is greater than 0 degrees but less than 90 degrees, and the mirror 1 extends between the left and right side edges of the instrument panel ID (for example, but not limited to, extending from the left side edge of the instrument panel ID to the right side edge of the instrument panel ID, which is equivalent to extending from the left A-pillar L-AP of the vehicle to the right A-pillar R-AP of the vehicle).

[0090] Each planar display module 3 is disposed below the mirror 1 and respectively projects an image beam D to the mirror 1, so that the mirror 1 can reflect the image beam D projected by each planar display module 3 to the viewer's eyes E, thereby forming an image virtual image VI behind the mirror 1 in the viewer's vision to provide the viewer with the vehicle status, navigation instructions or other information (for example, but not limited to, entertainment video information).

[0091] The panoramic head-up display is provided with a mirror seat 4 on the back side of the mirror 1, the mirror seat 4 is engaged with the mirror 1 and the instrument panel ID, thereby fixing the mirror 1 on the instrument panel ID and not blocking the projection path of the image beam D.

[0092] The material of the mirror seat 4 is opaque, and an outer surface 41 of the mirror seat 4 facing the windshield 6 can also be provided with light extinction properties, thereby avoiding the mirror seat 4 reflecting external light to the windshield 6 and affecting the forward view.

[0093] The panoramic head-up display is provided with a transparent protective cover 5 on the side of the mirror 1 close to the viewer, the upper edge of the transparent protective cover 5 is engaged with the mirror seat 4, and the lower edge is fixed on the instrument panel ID to support the mirror seat 4 and avoid damage to the structure under external pressure. The transparent protective cover 5 extends between the left and right side edges of the instrument panel ID. The transparent protective cover 5 is made of a material that allows the image beam D to pass through, for example, but not limited to, transparent glass or transparent plastic, thereby allowing the image beam D to pass through the transparent protective cover 5 and project to the viewer's eyes, and providing a protective effect to avoid surrounding debris falling in and blocking the mirror 1 to affect the projection path.

[0094] The width of the transparent protective cover 5 is similar to the width of the mirror 1, or the width of the transparent protective cover 5 is wider than the width of the mirror 1. In fact, the size of the transparent protective cover 5 is designed to cover the entire mirror 1.

[0095] Optionally, the transparent protective cover 5 can be a single transparent element, or composed of multiple small transparent elements. In fact, the present application does not limit the number of transparent elements and the spacing distance between adjacent transparent elements, as long as the mirror seat 4 can be supported.

[0096] In this way, the panoramic head-up display of the present application can provide similar display effects as the panoramic display of the prior art, but has the advantages of lower cost and flexible combination compared with the curved display panel used in the prior art. Moreover, by virtue of the self-provided mirror 1, the panoramic head-up display of the present application is not limited by the angle of the windshield 6 of the vehicle body, and can replace the expensive curved display panel.

[0097] In the present embodiment, the mirror 1 is a single-piece reflective element, as shown in Figure 4C , but the present application is not limited thereto. In other embodiments, the mirror 1 can also be composed of a plurality of small-area reflective elements RM abutting each other, as shown in Figure 4D , thereby reducing the difficulty of the manufacturing process, improving the yield, and saving costs.

[0098] On the other hand, when sunlight or other light is incident on the instrument panel ID, it is possible to be reflected from the instrument panel ID to the mirror 1, and then reflected from the mirror 1 to the viewer's eyes, causing glare and affecting the image quality, as shown in Figure 5A . To solve this problem, in the present embodiment or other embodiments, the mirror 1 can use a material that allows the image light beam D to partially penetrate and partially reflect, such as glass, plastic, etc., and the surface treatment of the front surface 11 of the mirror 1 and the incident angle of the image light beam D are designed to have a low reflectivity of the mirror 1 to the image light beam D, for example, less than 40%.

[0099] As shown in Figure 5B , the refractive index of general optical glass in the wavelength range of visible light is about 1.4-1.9. For example, taking the reflectivity of visible light projected on the surface of a mirror glass with a refractive index of 1.5 as an example, when the incident angle θi is less than 70 degrees, the sum of the P-wave reflectivity Rp and the S-wave reflectivity Rs is less than 40%.

[0100] The factors affecting the reflectivity are the surface treatment of the mirror and the incident angle of the light, so by pasting a thin film with lower reflectivity on the front surface 11 or plating a coating with lower reflectivity, or by setting a suitable incident angle θi, for example but not limited to 65 degrees, while keeping the original material of the mirror 1 without special treatment, the image light beam D projected by each flat display module 3 can be reflected by the mirror 1 only at a reflectivity of 40% or less. Moreover, the brightness of the backlight of the flat display module 3 is also increased; for example but not limited to, the luminance of the image light beam D projected by the flat display module 3 is adjusted to 1000 cd / m 2 , so that after being reflected by the mirror 1, the luminance of the image light beam D is reduced to 400 cd / m 2 . In this way, the viewer can only see the image projected by the flat display module 3, and will not see the reflection from the instrument panel ID.

[0101] In the embodiment or other embodiments, the front surface 11 of the mirror 1 can be a curved surface, such as a torus, a hyperboloid, or a free-form surface, etc.

[0102] In addition, as shown in Figure 5A , the image light beam D partially penetrates the front surface 11 of the mirror 1 to become the image light beam D_2, the image light beam D_2 is partially reflected by the rear surface 12 of the mirror 1 to become the image light beam D_3, the image light beam D_3 again partially penetrates the front surface 11 to form the image light beam D_4, and the image light beam D_4 travels to the viewer's eyes to form the ghost image.

[0103] The ghost image will affect the image quality of the viewing, so in the embodiment or other embodiments, a dark light-absorbing layer 13, such as but not limited to black paint, dark blue paint, dark green paint, or other dark color paint, can be provided on the rear surface 12 of the mirror 1, and the material of the dark light-absorbing layer 13 has the same or similar refractive index as the material of the mirror 1 for the wavelength of the image light beam. The image light beam D_2 that penetrates the front surface 11 of the mirror 1 will reach the interface between the rear surface 12 of the mirror 1 and the dark light-absorbing layer 13, and since the refractive index of the mirror 1 and the dark light-absorbing layer 13 is the same or similar, most of the light will enter the dark light-absorbing layer 13 and be absorbed, only a small part of the light is reflected to become the image light beam D_3, and only part of the image light beam D_3 will penetrate the front surface 11 to become the image light beam D_4. In this way, the image light beam D_4 that forms the ghost image can be greatly weakened.

[0104] In the embodiment or other embodiments, the material of the mirror 1, in addition to the general transparent glass or plastic, can also be a dark color material, such as but not limited to black, dark blue, dark green, or other dark color glass or plastic, thereby increasing the absorption rate of the image light beam D_2 and the image light beam D_3 that penetrate the front surface 11 of the mirror 1, thereby greatly weakening the image light beam D_4 that forms the ghost image, and helping to reduce the ghost image.

[0105] If the mirror 1 made of dark color material has a high enough absorption rate for the image light beam D_2 and the image light beam D_3, it is not necessary to provide any dark light-absorbing layer 13 on the rear surface 12 of the mirror 1, and the effect of avoiding the ghost image can also be achieved.

[0106] On the other hand, in the embodiment or other embodiments, the upper surface of the instrument panel ID below the mirror is provided with a recess ID_rc as shown in Figure 6A , so that the above-mentioned plurality of flat display modules 3, such as three flat display modules 3, can be arranged in the recess ID_rc as shown in Figure 6B .

[0107] In the present or other embodiments, each flat display module 3 comprises, for example but not limited to, a flat display panel 31 and a directional backlight module 32.

[0108] Each flat display panel 31 can display an image, and each directional backlight module 32 comprises an LED array (backlight array) composed of a plurality of LEDs 321. The directional backlight module 32 can project a directional backlight beam, which can penetrate the flat display panel 31 to form an image beam D shown in the figure. Figure 4A The image beam D is projected to the mirror 1 and then reflected by the mirror 1 to the viewer’s eyes, so that the viewer can see the image virtual image VI located behind the mirror 1.

[0109] The position of the image virtual image VI is close to the setting position of the curved display panel used in the prior art. In this case, if the front surface 11 of the mirror 1 is a concave mirror, the size of the image virtual image VI can be enlarged and the distance of the image virtual image VI relative to the viewer can be pulled away, so that a smaller area of the flat display panel 31 can be used to obtain the same display effect as the curved display panel used in the prior art, or even a larger and farther display effect.

[0110] In the present or other embodiments, as shown in the figure, Figure 6C The flat display panels 31 of the plurality of flat display modules 3 can be arranged, for example but not limited to, in a spaced and non-adjacent manner, and / or in a non-parallel alignment manner, as long as the viewer can see the image projected by each flat display panel 31 through the mirror 1.

[0111] In the present or other embodiments, the flat display panels 31 of the plurality of flat display modules 3 are arranged in an approximately horizontal manner, and the included angle between the display surface 311 of each flat display panel 31 and the horizontal plane is greater than or equal to 0 degrees but less than 10 degrees, so that an excessively large angle can be avoided, which can easily allow the viewer to directly see the flat display panel 31, as shown in the figure, and can also shorten the depth of the groove ID_rc, as shown in the figure. Figure 6D Figure 6E

[0112] In the case where the plurality of flat display modules 3 simultaneously display images, if the dark light-absorbing layer 13 and / or the mirror 1 made of dark material are used, and the front surface 11 is arranged to have a low reflectivity, as long as the brightness of the backlight is increased, the viewer can see a clear and bright ring image extending from the left side of the instrument panel ID to the right side of the instrument panel ID through the reflection of the mirror 1, without seeing the reflection from the instrument panel ID, without seeing the gap between the adjacent flat display panels 31, and without realizing that the image virtual image seen is provided by the images projected by the plurality of flat display panels 31. ​​

[0113] In addition, the spread angle of a beam is generally expressed as full width at half maximum (FWHM), which is the angle at which the light intensity is equal to half of the maximum intensity value.

[0114] In this embodiment or other embodiments, the directional backlight module 32 is rectangular. The direction of the longer side of the directional backlight module 32 is defined as horizontal, and the direction of the shorter side of the directional backlight module 32 is defined as vertical. The directional backlight beam emitted by the directional backlight module 32 is wider horizontally and narrower vertically, allowing the projected image beam D to expand in the direction to the left and right of the viewer's eyes and narrow in the direction above and below the viewer's eyes. This effectively covers the driver and co-driver without wasting space, allowing the large-area flat panel display panel 31 to display high-brightness images while also achieving power saving and cooling effects.

[0115] like Figure 7A As shown, each LED 321 constituting the directional backlight module 32 projects a backlight beam BL. For example... Figure 7B and 7C As shown, the lateral diffusion angle 'a' of this backlight beam BL is greater than the longitudinal diffusion angle 'b'. In order to cover the wide viewing angle requirements of the driver and co-driver, the lateral direction needs to be wide; in order to improve light utilization and achieve the effect of saving power and reducing heat, the longitudinal direction needs to be narrow. For example, but not limited to, the backlight beam BL can be set to meet the following condition: a>3b.

[0116] like Figure 7D As shown, the entire directional backlight module 32 projects a directional backlight beam L. Figure 7E and 7F As shown, the lateral diffusion angle A of this directional backlight beam L is greater than the longitudinal diffusion angle B. In order to cover the wide viewing angle requirements of the driver and co-driver, the lateral direction needs to be wide; in order to improve light utilization and achieve the effect of saving power and reducing heat, the longitudinal direction needs to be narrow; for example, but not limited to, the directional backlight beam L can be set to meet the following condition: A>3B.

[0117] In this invention, such as Figures 8A to 9C As shown, the panoramic head-up display can also adjust the projection angle of the image beam D according to the position of the viewer's eyes, deflecting it in the vertical direction so that the image beam D can be projected onto the eyes E1, E2 or E3 of the viewer at different horizontal heights.

[0118] The following are illustrative examples of how to adjust the projection angle to correspond to different eye positions.

[0119] <First type>

[0120] like Figures 8A-8CAs shown, the flat panel display 31 is fixed, the directional backlight module 32 is connected to a rotation drive device (not shown), the rotation drive device is connected to a controller (not shown), and the controller is connected to an eye position detection device (not shown).

[0121] Under these conditions, when the eye position detection device detects a change in the vertical direction in the viewer's eye, the controller, based on the detection result of the eye position detection device, controls the rotation drive device to rotate the directional backlight module 32, thereby changing the angle of the directional backlight module 32 relative to the flat panel display 31, such as... Figures 8A-8C .

[0122] Selectively, the angle between the display surface 311 of the flat panel 31 and the horizontal plane is maintained within the range of greater than or equal to 0 degrees but less than 10 degrees.

[0123] <Second type>

[0124] like Figures 9A-9C As shown, the housing of the flat panel display module 3 is connected to a rotation drive device (not shown), which is connected to a controller (not shown), and the controller is connected to an eye position detection device (not shown).

[0125] Under these conditions, when the eye position detection device detects a change in the vertical direction of the viewer's eye, the controller, based on the detection result, controls the rotation drive device to rotate the flat panel display module 3, causing the directional backlight module 32 and the flat panel display panel 31 to change their orientation, thereby changing the angle of the display surface 311 relative to the horizontal plane. Figures 9A-9C As shown.

[0126] Selectively, the angle between the display surface 311 of the flat panel 31 and the horizontal plane is maintained at greater than or equal to 0 degrees but less than 10 degrees.

[0127] In summary, the surround-view head-up display of the present invention extends between the left and right edges of the dashboard via a reflector. A mirror mount for fixing to the dashboard is provided behind the reflector, and a transparent protective cover for support is provided in front of the reflector. The reflector's reflective surface has a low reflectivity to avoid reflecting light from the dashboard. The reflector can absorb light that penetrates its reflective surface, avoiding ghosting. Multiple planar display modules are installed within the dashboard below the reflector. Each planar display module projects an image beam to the reflector, which reflects the image beam to the viewer's (i.e., passenger's) eyes, allowing the viewer to visually see a virtual image from the left to the right side of the dashboard. This displays more information to different viewers inside the vehicle, thus adapting to different windshield angles and achieving a display effect similar to or better than that of expensive surround-view displays in the prior art.

[0128] While the application has been disclosed with reference to the previously described embodiments, further modifications and improvements will occur to others skilled in the art. It is intended that the scope of the application be defined by the following claims, including all equivalents.

Claims

1. A surround view head-up display, characterized by, The surround-view head-up display is suitable for placement on a dashboard and includes: A reflector is disposed on the upper surface of the dashboard and extends between the left and right edges of the dashboard, wherein the angle between the front surface of the reflector facing the viewer and the upper surface of the dashboard is less than 90 degrees. A mirror mount is provided on the instrument panel and is used to fix the reflector to the instrument panel; A transparent protective cover is provided on the side of the reflector closest to the viewer. The upper edge of the transparent protective cover is engaged with the mirror base, and the lower edge of the transparent protective cover is fixed to the dashboard to support the mirror base. as well as Multiple flat panel display modules are disposed below the reflector and are used to project an image beam onto the reflector respectively. The reflector reflects the image beams projected by these flat panel display modules to the viewer's eyes, thereby visually forming multiple virtual images located behind the reflector.

2. The surround view head-up display of claim 1, wherein, The mirror contains multiple adjacent reflective elements.

3. The surround view head-up display of claim 1, wherein, The mirror has a dark light-absorbing layer on its rear surface, opposite to the front surface.

4. The surround view head-up display of claim 3, wherein, The dark light-absorbing layer has the same or similar refractive index to the image beam as the material of the mirror.

5. The surround view head-up display of claim 1, wherein, The material of this reflector is dark in color.

6. The surround view head-up display of claim 1, wherein, The front surface of the mirror is curved.

7. The surround view head-up display of claim 1, wherein, The reflector is made of a material that can partially reflect and partially transmit light.

8. The surround view head-up display of claim 1, wherein, The front surface of the mirror has a reflectivity of less than 40% for the image beam.

9. The surround view heads-up display of claim 8, wherein, The front surface of the mirror is provided with a low-reflectivity material layer, which has a reflectivity of less than 40% for the image beam.

10. The surround view heads-up display of claim 8, wherein, The material of the reflector has a refractive index of 1.4 to 1.9 for visible light, and the incident angle of the image beam on the front surface of the reflector is greater than 0 degrees but less than 70 degrees.

11. The surround view head-up display of claim 1, wherein, The lens mount is opaque, and its outer surface has an matte finish.

12. The surround view head-up display of claim 1, wherein, These flat panel display modules are housed in recesses on the instrument panel.

13. The surround view head-up display of claim 1, wherein, The angle between the display surface of this flat panel display module and a horizontal plane is greater than or equal to 0 degrees but less than 10 degrees.

14. The surround view head-up display of claim 1, wherein, The flat panel display module includes a flat panel display and a directional backlight module. The flat panel display is used to display an image, and the directional backlight module includes a backlight array for projecting a directional backlight beam. The directional backlight beam passes through the flat panel display to form the image beam.

15. The surround view heads-up display of claim 14, wherein, The directional backlight beam has a lateral diffusion angle greater than a longitudinal diffusion angle.

16. The surround view heads-up display of claim 15, wherein, The lateral diffusion angle is more than three times the longitudinal diffusion angle.

17. The surround view heads-up display of claim 14, wherein, The orientation of the directional backlight module is adjustable.

18. The surround view heads-up display of claim 14, wherein, The orientation of the directional backlight module can be adjusted in conjunction with the orientation of the flat panel display.

19. The surround view heads-up display of claim 14, wherein, The flat panel displays of these flat panel display modules are spaced apart from each other.

20. The surround view heads-up display of claim 14, wherein, The flat panel displays of these flat panel display modules are not parallel to each other.

Images