CN112034620A - Target reflection type diffusion sheet head-up display device - Google Patents
Target reflection type diffusion sheet head-up display device Download PDFInfo
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- CN112034620A CN112034620A CN201910481425.1A CN201910481425A CN112034620A CN 112034620 A CN112034620 A CN 112034620A CN 201910481425 A CN201910481425 A CN 201910481425A CN 112034620 A CN112034620 A CN 112034620A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
Abstract
The invention discloses a head-up display device of a target reflection type diffusion sheet, which comprises a projection module and the target reflection type diffusion sheet, wherein the target reflection type diffusion sheet is provided with an array of micro mirrors, an image light source projected by the projection module can be reflected and diffused to a designed diffusion area, the intersection range of the diffusion areas is an eye box, and the projected image can be seen as long as human eyes are in the eye box range, so that the problem of uneven brightness caused by interference phenomenon is reduced, and the image brightness can achieve the maximum effect.
Description
Technical Field
The present invention relates to a head-up display device with a target reflective diffuser, and more particularly, to a head-up display device with a target reflective diffuser capable of reducing interference, thereby reducing the problem of brightness unevenness caused by the interference, and having no redundant structure, thereby reducing the cost and maximizing the image brightness.
Background
The head-up display technology used in the present automobile is an optical system, which generally consists of two main devices, namely a projector and an image-overlapping mirror; the projector consists of a signal light source, a projection lens and other optical elements; the signal light source of the projector is composed of LCD or projector and image screen, the light is emitted from the signal light source, then projected onto the image-superimposing lens (combiner) on the glass or special transparent screen by the projector, and then displayed by the image-superimposing lens to overlap the characters or images with the real scene in front of the eye.
As shown in fig. 1, projectors Po (including DLP) need to use a screen or a diffusion sheet for image formation, and projectors Po for rear projection are arranged on the back of the diffusion sheet and use a translucent transmission diffusion sheet; the principle of the projector Po is that a picture is scanned to project different color light spots to each point of a projected plane, the light spots form a picture, when the light spots are projected to the mirror surface of the reflector a, because the incident angle is equal to the reflection angle, the reflection plane a1 projected to the reflector a by the projector Po is like a mirror surface, the reflected picture only has a point of light reflected to the eye Eo of a specific viewer, so that the viewer can only see a point light source at any angle, and cannot see a complete picture.
Therefore, the projector Po cannot project onto the reflection plane of the mirror surface when in use, and needs to project onto the reflection plane B1 (as shown in fig. 2) of the fog surface to scatter the reflected light and disperse the reflected light to various reflection angles, the reflector with the reflection plane B1 of the fog surface is called a diffusion sheet B, the light hits one reflection plane B1, part of the light is absorbed, the rest of the light is reflected, and if the reflected light is diffused to each angle, each angle can make the eye Eo view the whole picture, but the light quantity obtained from a single angle becomes very small, so that when the projector Po plays, a better projection curtain usually contains powder for increasing reflection in a dark environment, so as to reduce the absorption of the light and increase the intensity of the reflected light, but the cost is relatively increased, and the effect is limited, only a reduced proportion of the absorbed is achieved, but the losses resulting from the dispersion into angles are not remedied.
The laser is theoretically constructive interference due to the relationship of continuous synchronization of light beams, but the laser projector can image by projecting on a diffusion sheet, generally, the diffusion sheet adopts a method of surface roughness to diffuse image pixels, but the roughness also enables irregular phase difference to be generated in the reflected laser stroke, so that certain points have constructive interference, and certain points have bright and dark light spots of destructive interference, and the light spots directly influence the image quality of the laser projector and are not easy to remove.
Generally, there are many methods for reducing laser spots, and a general method is to provide a transparent disc with irregular lines on a light source and rotate the transparent disc by the driving of a motor so as to destroy the consistency of the laser light source.
In order to solve the above problems, various solutions are proposed continuously, and related patent documents may refer to patent documents TW I622505, TW I367405, TW I449950, TW M455182, TW I506299, TW I485432, TW I579591, TW I578085, and the like.
In the aforesaid patent publications, most of the technologies of the existing head-up display devices can be improved, but some defects still need to be overcome, for example, the problem of uneven brightness caused by interference phenomenon cannot be effectively solved, or the problem of cost increase caused by large structure, and the effect that the image brightness cannot reach the maximum, etc. are technical bottlenecks to be broken through.
Disclosure of Invention
Accordingly, the present invention has been made in an infinite number of research and improvements, and an object of the present invention is to provide a target reflective diffuser head-up display apparatus capable of reducing interference, wherein the characteristics of an elliptic curved surface are utilized to make an image light source reflected to a user eye box through any point on a diffuser have the same optical path, the diffused light is continuously synchronized, consistent constructive interference is maintained, image brightness consistency is maintained, no light spot is generated, the problem of uneven brightness caused by the interference is reduced, no redundant structure is generated, the cost is low, and the image brightness is maximized.
To achieve the above object, the present invention provides a head-up display device with a target reflective diffuser, comprising:
a projection module for projecting an image light source;
the target reflection type diffusion sheet is provided with a plane, the plane is provided with an array of micro mirrors, the image light source is projected to the target reflection type diffusion sheet, and the micro mirrors have different reflection angles;
the micro-mirror can reflect and diffuse the projected image light source to a designed diffusion area, the intersection range of the designed diffusion areas of the micro-mirrors is an eyebox, and the projected image can be seen as long as human eyes are in the eyebox range.
The head-up display equipment of the target reflection type diffusion sheet further comprises a reflecting mirror and a concave mirror, wherein the target reflection type diffusion sheet reflects the image light source to the reflecting mirror, the reflecting mirror reflects the image light source to the concave mirror, and the concave mirror reflects the image light source to the eye box position of a user.
The invention further comprises a reflecting mirror, a concave mirror and a windshield, wherein the target reflection type diffusion sheet reflects the image light source to the reflecting mirror, the reflecting mirror reflects the image light source to the concave mirror, the concave mirror reflects the image light source to the windshield, and the windshield reflects the image light source to the eye box position of a user.
The micro-mirror array on the target reflection type diffusion sheet reflects the projection picture by using all or part of the micro-mirrors, so that the required projection picture can be achieved.
The micro-mirrors with different diffusion regions can have the same or different diffusion regions.
The projection module is a laser projection device, and the spot diameter of the laser beam is smaller than that of the micro-mirror.
The head-up display device further comprises a reflector, wherein the target reflection type diffusion sheet reflects the image light source to the reflector, and the reflector reflects the image light source to the eye box position of a user.
The head-up display equipment further comprises a reflector and a windshield, wherein the target reflection type diffusion sheet reflects the image light source to the reflector, the reflector reflects the image light source to the windshield, and the windshield reflects the image light source to the eye box position of a user.
The reflecting mirror is a concave mirror, and the concave mirror can reflect and amplify images.
The windshield is provided with a reflecting film with a semitransparent and semi-reflecting effect.
The invention relates to a head-up display device of a target reflection type diffusion sheet, which comprises:
a projection module for projecting an image light source;
the target reflection type diffusion sheet is provided with a curved surface, the curved surface is provided with an array of micro mirrors, and the image light source is projected to the target reflection type diffusion sheet;
the micro-mirror can reflect and diffuse the projected image light source to a designed diffusion area, the intersection range of the designed diffusion areas of the micro-mirrors is an Eye Box (Eye Box), and the projected image can be seen as long as the human Eye is in the Eye Box range.
The head-up display equipment of the target reflection type diffusion sheet further comprises a reflecting mirror and a concave mirror, wherein the target reflection type diffusion sheet reflects the image light source to the reflecting mirror, the reflecting mirror reflects the image light source to the concave mirror, and the concave mirror reflects the image light source to the eye box position of a user.
The invention further comprises a reflecting mirror, a concave mirror and a windshield, wherein the target reflection type diffusion sheet reflects the image light source to the reflecting mirror, the reflecting mirror reflects the image light source to the concave mirror, the concave mirror reflects the image light source to the windshield, and the windshield reflects the image light source to the eye box position of a user.
The micro-mirror array on the target reflection type diffusion sheet reflects a projection picture by using all or part of micro-mirrors in the area, so that the required projection picture can be achieved, and the designed diffusion areas of the micro-mirrors in different positions of the diffusion area can be the same or different diffusion areas.
The projection module is a laser projection device, and the spot diameter of the laser beam is smaller than that of the micro-mirror.
The head-up display device further comprises a reflector, wherein the target reflection type diffusion sheet reflects the image light source to the reflector, and the reflector reflects the image light source to the eye box position of a user.
The head-up display equipment further comprises a reflector and a windshield, wherein the target reflection type diffusion sheet reflects the image light source to the reflector, the reflector reflects the image light source to the windshield, and the windshield reflects the image light source to the eye box position of a user.
The reflecting mirror is a concave mirror, and the concave mirror can reflect and amplify images.
The windshield is provided with a reflecting film with a semitransparent and semi-reflecting effect.
The invention relates to a head-up display device of a target reflection type diffusion sheet, wherein the curved surface of the target reflection type diffusion sheet is an elliptic curved surface.
The head-up display device of the target reflection type diffusion sheet is characterized in that the target reflection type diffusion sheet is manufactured into an array which is fully distributed with micro mirrors in the same direction on a flexible plane soft board, then the flexible plane soft board is attached to the curved surface, and the micro mirrors on the target reflection type diffusion sheet can be projected to the required direction.
Drawings
Fig. 1 is a schematic view of a conventional projection apparatus.
Fig. 2 is a schematic diagram of another embodiment of a conventional projection apparatus.
FIG. 3 is an enlarged schematic view of an array structure of a micro-mirror according to the present invention.
FIG. 4 is a schematic size diagram of a micro-mirror according to the present invention.
FIG. 5 is an enlarged view of the micro-mirror of the present invention.
Fig. 6 is a schematic view of a target diffuser projection image of the present invention.
FIG. 7 is a schematic view of the diffusion of the micro-mirror according to the present invention.
FIG. 8 is a schematic view of an eye box after the micro-mirror array on the target diffuser of the present invention has been diffused.
Fig. 9 is a schematic view of a first embodiment of the present invention.
Fig. 10 is another schematic diagram of the first embodiment of the present invention.
Fig. 11 is another schematic view of the first embodiment of the invention.
Fig. 12 is a schematic view of a second embodiment of the present invention.
FIG. 13 is another schematic diagram of the second embodiment of the present invention.
Fig. 14 is another schematic view of the second embodiment of the present invention.
FIG. 15 is a schematic view of an elliptic curve surface according to a second embodiment of the present invention.
FIG. 16 is another schematic view of an elliptic curve surface according to a second embodiment of the present invention.
Fig. 17 is a schematic view of a third embodiment of the present invention.
Fig. 18 is a schematic view of a fourth embodiment of the present invention.
Fig. 19 is a schematic view of a fifth embodiment of the present invention.
Fig. 20 is an enlarged virtual image schematic view of a concave mirror according to the present invention.
Fig. 21 is a schematic view of a sixth embodiment of the present invention.
Fig. 22 is a schematic view of a seventh embodiment of the present invention.
Fig. 23 is a schematic view of an eighth embodiment of the present invention.
Fig. 24 is a schematic view of a ninth embodiment of the present invention.
Description of reference numerals: a Po-projector; a-a mirror; a 1-reflection plane; b-a diffusion sheet; b1-reflection plane; eo-eye; 1-a projection module; an L-image light source; 2-target reflective diffusion sheet; 21-a micro mirror; 211-reflection angle; 212-concave mirror; 213-convex mirror; 214-a flat mirror; e-eye box; f1 — first focus; f2 — second focus; 3-a mirror; 31-concave mirror; 4-a windshield; 41-a reflective film; f-focus is; 61-an object; 62-erecting the virtual image; q-image distance; p-object distance; ho — object height; hi-imaging height.
Detailed Description
As shown in fig. 3 to 11, a first embodiment of a target reflective diffuser head-up display apparatus according to the present invention (see fig. 9) includes:
a projection module 1 for projecting an image light source L, wherein the projection device 1 is a laser projection device;
a target reflective diffusion sheet 2 having a plane on which an array of micro mirrors 21 is disposed, the image light source L being directed toward the target reflective diffusion sheet 2, wherein the micro mirrors 21 are arranged at different reflection angles 211.
As shown in fig. 3, the target reflective diffusion sheet 2 is arranged in a square array or a hexagonal honeycomb array by using a plurality of micro mirrors 21.
As shown in FIG. 4, the size of each micro-mirror 21 can be, but is not limited to, 25um to 0.25mm for the embodiment.
The micro mirror 21 can be a concave mirror, a convex mirror or a plane mirror, as shown in fig. 5, taking an enlarged view of the micro mirror 21 as a concave mirror as an example, the reflection angle 211 of each mirror of the micro mirror 21 can be directed to any direction according to the design requirement, so that the directivity of the target reflective diffusion sheet 2 has a very high degree of freedom.
As shown in fig. 6, the array of micro mirrors 21 on the target reflective diffusion sheet 2 can achieve a desired projection image by reflecting the projection image using all or a part of the micro mirrors 21.
As shown in fig. 7, the micro mirror 21 on the target reflective diffusion sheet 2 can be a concave mirror 212, a convex mirror 213 or a plane mirror 214, and the disposition angle and the curved surface of the micro mirror 21 can be designed according to the functional requirements, so as to control the diffusion angle and range, i.e. when the light from the image light source L is projected onto the micro mirror 21, the light will be diffused to a specific angle and range.
When the projection apparatus 1 of the present invention is a laser projection apparatus, as long as the spot diameter of the laser beam is smaller than the micro mirror 21, the same laser beam does not strike the plurality of micro mirrors 21, so that the interference phenomenon can be avoided, thereby solving the spot problem.
As shown in fig. 8, the present invention further uses a plurality of micro mirrors 21 distributed on the target reflective diffusion sheet 2, each micro mirror 21 having a different angle or curved surface.
The present invention is characterized in that the micro mirror 21 reflects and diffuses the projected image light source L to a designed diffusion region, the designed diffusion regions of the micro mirrors 21 at different positions can be the same or different diffusion regions, and the intersection range of the designed diffusion regions of the micro mirrors 21 is an eye box E (eye box), so that the projected image can be seen by human eyes as long as the human eyes are in the range of the eye box E.
As shown in fig. 9, the micro mirror 21 is a concave mirror, the micro mirrors 21 are distributed on the target reflective diffusion sheet 2, the micro mirrors 21 have different angles, and reflect and diffuse the projected image light source L to a same range, and the overlapping range is the eye box E.
As shown in fig. 10, the micro-mirror 21 is a convex mirror, and reflects and diffuses the projected image light source L to a same range, and the overlapped range is the eye box E.
As shown in fig. 11, the micro mirror 21 is a plane mirror, and the diffusion effect of the micro mirror 21 is poor, so the light reflected by the target reflective diffusion sheet 2 is concentrated, and the eye box E range is also small.
As shown in fig. 12 to 16, a second embodiment of a target reflective diffuser head-up display apparatus according to the present invention (see fig. 12) includes:
a projection module 1 for projecting an image light source L, wherein the projection device 1 is a laser projection device;
a target reflective diffusion sheet 2 having a curved surface on which an array of micro mirrors 21 is provided, the image light source L being directed toward the target reflective diffusion sheet 2;
the micro-mirror 21 reflects and diffuses the projected image light source L to a designed diffusion area, the designed diffusion areas of the micro-mirrors 21 at different positions can be the same or different diffusion areas, and the intersection range of the designed diffusion areas of the micro-mirrors 21 is an eye box E (eye box), so that the projected image can be seen by human eyes as long as the human eyes are in the range of the eye box E.
The target reflective diffusion sheet 2 of the present invention can be manufactured by first fabricating an array of micro-mirrors 21 arranged in the same direction on a flexible flat flexible board, and then attaching the flexible flat flexible board to the curved surface, so that the micro-mirrors 21 on the target reflective diffusion sheet 2 can be projected to the desired direction.
As shown in fig. 12, the micro mirror 21 is a concave mirror, the micro mirrors 21 are distributed on the target reflective diffusion sheet 2, the micro mirrors 21 have different angles, and can reflect and diffuse the projected image light source L to a same range, and the overlapping range is the eye box E.
As shown in fig. 13, the micro mirror 21 is a convex mirror, and reflects and diffuses the projected image light source to a same range, and the overlapped range is the eye box E.
As shown in fig. 14, in which the micro mirror 21 is a plane mirror, the diffusion effect of the micro mirror 21 is poor, so the light reflected by the target reflective diffusion sheet 2 is concentrated, and the eye box E range is also small.
As shown in fig. 15, the target reflective diffusion sheet 2 is a curved micro-mirror 21 array, wherein the curved surface of the target reflective diffusion sheet 2 is an elliptic curved surface, and the ellipse is a locus of points on a plane where the sum of distances to two fixed points is constant, the two fixed points being a first focus F1 and a second focus F2; a line segment passing through the two foci and terminating on the ellipse is called the major axis, a line segment passing through the center (the midpoint of the line joining the two foci) perpendicular to the major axis and terminating on the ellipse is called the minor axis, 2a is the major axis of the ellipse, 2b is the minor axis of the ellipse, and if the focal length of the ellipse is c, then a2 is b2+ c 2.
The equation of the elliptical orbit is
As shown in fig. 16, according to the above ellipse trajectory equation, if a light ray emitted from one focus point (e.g. the first focus point F1) of the elliptic surface in any direction encounters the elliptic surface and is reflected, the reflected light ray must pass through the other focus point (e.g. the second focus point F1), and vice versa.
The present invention is characterized in that the projection module 1 is disposed at a first focus F1 of the elliptical curved surface of the target reflective diffusion sheet 2, the image light source L is projected toward the elliptical curved surface of the target reflective diffusion sheet 2, the image light source L after reflection converges at another second focus F2 of the elliptical curved surface of the target reflective diffusion sheet 2, and the second focus F2 is the position of an eye box E seen by a user.
Due to the characteristics of the elliptic curved surface, the image light source is reflected to the eye box E seen by a user through any point on the target reflection type diffusion sheet 2, the eye box E has the same optical path, the diffused light is still kept continuously and synchronously, the consistent constructive interference is maintained, the image brightness consistency can be maintained, no light spot exists, the brightness unevenness caused by the interference can be reduced, the cost is low due to no redundant structure, and the image brightness can achieve the effect of maximization.
As shown in fig. 17, a third embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2 having an elliptical curved surface with an array of micro mirrors 21, the image light source L being directed to the target reflective diffusion sheet 2, the target reflective diffusion sheet 2 reflecting the image light source L to the eye box E of the user.
The invention is characterized in that the image light source L is projected to the elliptic curved surface of the target reflective diffusion sheet 2 and then converged to the position of the user eye box E at the other focus position of the elliptic curved surface of the equivalent target reflective diffusion sheet 2.
As shown in fig. 18, a fourth embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2, which is a planar or curved micro-mirror 21 array, and the image light source L is projected to the target reflective diffusion sheet 2;
a reflector 3, which can be a concave mirror, a convex mirror or a plane mirror, the target reflective diffusion sheet 2 reflects the image light source L to the reflector 3, and the reflector 3 reflects the image light source L to the position of the eye box E of the user.
As shown in fig. 19, a fifth embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2 having a plane or a curved surface, the plane or the curved surface having a 21 array of the micro mirrors, the image light source L being directed to the target reflective diffusion sheet 2;
a reflector 3, which can be a concave mirror, a convex mirror or a plane mirror, the target reflective diffusion sheet 2 reflects the image light source L to the reflector 3;
a windshield 4, the reflector 3 reflects the image light source to the windshield 4, and the windshield 4 reflects the image light source L to the eye box E of the user.
The windshield 4 is provided with a reflective film 41 having a semi-transparent and semi-reflective effect, so as to increase the reflectivity of the image light source L.
Fig. 20 is a schematic view of a concave mirror in an enlarged virtual image, in which the focal point of the concave mirror 31 is F; when the object 61 is placed between the focal point F and the concave mirror 31, the object 61 is imaged behind the concave mirror 31 as an enlarged erect virtual image 62, and the magnification of the enlarged erect virtual image can be obtained by the ratio of the image distance q to the object distance p (the magnification can also be obtained by the ratio of the object height Ho to the imaging height Hi); the magnification is greater if the object 61 is closer to the focal point F; if the object 61 is placed in the focal point F, the image is at infinity.
As shown in fig. 21, a sixth embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2 having a plane or a curved surface, the plane or the curved surface having the array of micro mirrors 21, the image light source L being directed to the target reflective diffusion sheet 2;
a concave mirror 31, the target reflective diffusion sheet 2 reflects the image light source L to the concave mirror 31, and the concave mirror 31 reflects and enlarges the image light source L to the position of the user eye box E.
As shown in fig. 22, a seventh embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2 having a plane or a curved surface, the plane or the curved surface having the array of micro mirrors 21, the image light source L being directed to the target reflective diffusion sheet 2;
a concave mirror 31, the target reflective diffusion sheet 2 reflects the image light source L to the concave mirror 31;
a windshield 4, the concave mirror 31 reflects and magnifies the image light source L to the windshield 4, and the windshield 4 reflects the image light source L to the position of the eye box E of the user.
The windshield 4 is provided with a reflective film 41 having a semi-transparent and semi-reflective effect, so as to increase the reflectivity of the image light source L.
As shown in fig. 23, an eighth embodiment of a target reflective diffuser head-up display apparatus according to the present invention includes:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2 having a plane or a curved surface, the plane or the curved surface having the array of micro mirrors 21, the image light source L being directed to the target reflective diffusion sheet 2;
a reflector 3, which can be a concave mirror, a convex mirror or a plane mirror, the target reflective diffusion sheet 2 reflects the image light source L to the reflector 3;
a concave mirror 31, the reflection mirror 3 reflects the image light source L to the concave mirror 31, and the concave mirror 31 reflects and enlarges the image light source L to the position of the user's eye box E.
As shown in fig. 24, a ninth embodiment of the present invention is a target reflective diffuser head-up display device, including:
a projection module 1 for projecting an image light source L;
a target reflective diffusion sheet 2, the target reflective diffusion sheet 2 having a plane or a curved surface, the plane or the curved surface having the array of micro mirrors 21, the image light source L projecting toward the target reflective diffusion sheet 2;
a reflector 3, which can be a concave mirror, a convex mirror or a plane mirror, the target reflective diffusion sheet 2 reflects the image light source L to the reflector 3;
a concave mirror 31, the reflecting mirror 3 reflects the image light source L to the concave mirror 31;
a windshield 4, the concave mirror 31 reflects and magnifies the image light source to the windshield 4, and the windshield 4 reflects the image light source L to the position of the eye box E of the user.
The windshield 4 is provided with a reflective film 41 having a semi-transparent and semi-reflective effect, so as to increase the reflectivity of the image light source L.
In summary, the head-up display device of the target reflective diffuser of the present invention can solve the problem of uneven brightness caused by interference, has no redundant structure, is low in cost, can maximize the image brightness, and can effectively solve the disadvantages of the prior art.
The embodiments of the present invention are provided in the summary of the invention only for convenience of illustration, and the invention is not limited to the embodiments in a narrow sense, and various modifications can be made without departing from the spirit and scope of the invention.
Claims (20)
1. A target reflective diffuser head-up display device comprising:
a projection module for projecting an image light source;
the target reflection type diffusion sheet is provided with a plane, the plane is provided with an array of micro mirrors, the image light source is projected to the target reflection type diffusion sheet, and the micro mirrors have different reflection angles; it is characterized in that
The micro-mirror reflects and diffuses the projected image light source to a designed diffusion area, the intersection range of the designed diffusion areas of the micro-mirrors is an eyebox, and the projected image can be seen as long as human eyes are in the eyebox range.
2. The target reflecting diffuser head-up display apparatus of claim 1 further comprising a reflector and a concave mirror, wherein the target reflecting diffuser reflects the image light source to the reflector, the reflector reflects the image light source to the concave mirror, and the concave mirror reflects the image light source to the user eye box position.
3. The target reflecting diffuser head-up display apparatus of claim 1 further comprising a reflector, a concave mirror and a windshield, the target reflecting diffuser reflecting the image light source to the reflector, the reflector reflecting the image light source to the concave mirror, the concave mirror reflecting to the windshield, the windshield reflecting the image light source to the user eye box position.
4. The target reflective diffuser head-up display apparatus of claim 1, wherein the micro mirror array on the target reflective diffuser uses all or a portion of the micro mirrors to reflect the projected image, thereby achieving the desired projected image.
5. The target reflective diffuser head-up display apparatus of claim 1 wherein the micro mirrors at different locations of the diffusion area are designed with the same or different diffusion areas.
6. The target reflective diffuser head-up display apparatus of claim 1, wherein the projection module is a laser projection device having a laser beam with a spot diameter smaller than the micro mirror.
7. The target reflective diffuser head-up display apparatus of claim 1 further comprising a mirror, the target reflective diffuser reflecting the image light source to the mirror, the mirror reflecting the image light source to a user eye box position.
8. The target reflective diffuser head-up display apparatus of claim 1 further comprising a mirror and a windshield, the target reflective diffuser reflecting the image light source to the mirror, the mirror reflecting the image light source to the windshield, the windshield reflecting the image light source to a user eye box position.
9. The target reflective diffuser head-up display apparatus of claim 8, wherein the reflector is a concave mirror that reflects and magnifies the image.
10. The target reflective diffuser head-up display apparatus of claim 8, wherein the windshield is provided with a reflective film having a semi-transparent and semi-reflective effect.
11. A target reflective diffuser head-up display device comprising:
a projection module for projecting an image light source;
the target reflection type diffusion sheet is provided with a curved surface, the curved surface is provided with an array of micro mirrors, and the image light source is projected to the target reflection type diffusion sheet; it is characterized in that
The micro-mirror reflects and diffuses the projected image light source to a designed diffusion area, the intersection range of the designed diffusion areas of the micro-mirrors is an eye box, and the projected image can be seen as long as human eyes are in the range of the eye box.
12. The target reflecting diffuser head-up display apparatus of claim 11 further comprising a reflector and a concave mirror, wherein the target reflecting diffuser reflects the image light source to the reflector, the reflector reflects the image light source to the concave mirror, and the concave mirror reflects the image light source to the user eye box position.
13. The target reflecting diffuser head-up display apparatus of claim 11 further comprising a reflector, a concave mirror and a windshield, the target reflecting diffuser reflecting the image light source to the reflector, the reflector reflecting the image light source to the concave mirror, the concave mirror reflecting to the windshield, the windshield reflecting the image light source to the user's eye box position.
14. The apparatus of claim 11, wherein the micro mirrors in the micro mirror array of the target reflective diffuser reflect the projected image using all or a portion of the micro mirrors to achieve the desired projected image, and the micro mirrors at different positions of the diffusion area have the same or different diffusion areas.
15. The target reflective diffuser head-up display apparatus of claim 11, wherein the projection module is a laser projection device having a laser beam with a spot diameter smaller than the micro mirror.
16. The target reflective diffuser head-up display apparatus of claim 11 further comprising a mirror, the target reflective diffuser reflecting the image light source to the mirror, the mirror reflecting the image light source to a user eye box position.
17. The target reflective diffuser head-up display apparatus of claim 11 further comprising a mirror and a windshield, the target reflective diffuser reflecting the image light source to the mirror, the mirror reflecting the image light source to the windshield, the windshield reflecting the image light source to the user eye box position.
18. The target reflective diffuser head-up display apparatus of claim 17, wherein the reflector is a concave mirror that reflects and magnifies the image, and the windshield has a reflective film with semi-transparent and semi-reflective effects.
19. The target reflective diffuser head-up display apparatus of claim 11, wherein the target reflective diffuser is fabricated on a flexible flat flexible plate to form an array of micro mirrors distributed in the same direction, and the flexible flat flexible plate is attached to the curved surface, and the micro mirrors on the target reflective diffuser are projected in a desired direction.
20. The target reflective diffuser overhead display device of claim 11 wherein the curved surface of the target reflective diffuser is an elliptical curved surface, wherein the projection module is positioned at one of the first foci of the elliptical curved surface, the image light source is directed at the elliptical curved surface of the target reflective diffuser, and the image light source, after reflection, converges at another second focus of the elliptical curved surface, the second focus being the user's eye box position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910481425.1A CN112034620A (en) | 2019-06-04 | 2019-06-04 | Target reflection type diffusion sheet head-up display device |
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| CN113126191A (en) * | 2021-04-27 | 2021-07-16 | 上海慧希电子科技有限公司 | Optical device and optical system |
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