TWI705910B - Target reflection type diffuser head-up display device - Google Patents

Abstract

The present invention relates to a head-up display device with a target reflective diffuser, which includes a projection module and a target reflective diffuser. The target reflective diffuser is provided with an array of micro-mirrors, and the projection module The projected image light source is reflected and diffused to a designed diffusion area, and the intersection range of these diffusion areas is an eye box. As long as the human eye is within the eye box, the projected image can be seen, thereby reducing the interference caused by the phenomenon. The uneven brightness caused by the problem maximizes the brightness of the image.

Description

Target reflective diffuser head-up display device

The present invention relates to a head-up display device with a target reflective diffuser, especially a target reflective diffuser head-up display device that can reduce interference, so as to reduce the uneven brightness caused by interference, and There is no redundant structure, so the cost is low, and the image brightness can be maximized.

The head-up display technology used in automobiles today is an optical system, which is generally composed of two main devices: a projector and a stacking mirror; the projector is composed of a signal light source, a projection lens and other optical components; the signal light source of the projector is composed of It is composed of LCD liquid crystal display or projector and display screen and other devices, which emit light from a signal light source, and then project it through the projector onto a combiner on the glass or a special transparent screen, and then display by the mirror The text or image overlaps with the real scene in front of you.

As shown in the first figure, the projector Po (including DLP) needs to use a display screen or diffuser for imaging. The projector Po for rear-projection projection is placed on the back of the diffuser and uses a translucent diffuser; The principle of the projector Po is to use a scanning method to project a different color point of light on each point of the projected plane. These light points form a picture. When projected on the mirror surface of the mirror A, due to the angle of incidence It is equal to the reflection angle. If the reflection plane A1 of the projector Po projected to the mirror A is a mirror, only a small amount of light will be reflected into the eye Eo of a specific viewer, so no matter which angle the viewer is at Can see a point light source, but can't see a complete picture.

Therefore, the projector Po cannot be projected onto the reflective plane of the mirror when in use, and needs to be projected onto the reflective plane B1 of the matte surface (as shown in the second figure) to disperse the reflected light and spread the reflected light to various reflection angles. This kind of mirror with a matte reflection plane B1 is called diffuser B. When the light hits a reflection plane B1, some of the light is absorbed, and the remaining light is reflected. If the reflected light is added to each Angles, each angle allows the eyes Eo to see the entire picture, but the amount of light that can be obtained from a single angle becomes very small, so that when the projector Po is playing, it is usually in a darker environment and a better projection cloth The screen will contain powder that increases reflection to reduce the absorption of light and increase the intensity of the reflected light, but the cost will increase a lot, and the effect is limited. It can only reduce the proportion of absorption, but it is generated by dispersing to various angles. The loss is irreparable.

Because of the continuous synchronization of the beam, the laser is theoretically constructive interference, but the laser projector needs to be projected on the diffuser to image. Generally, the diffuser uses a rough surface method to diffuse the image elements, but the roughness also makes reflection The laser light stroke produces an irregular phase difference, which causes constructive interference at some points, and bright and dark spots with destructive interference at some points. This spot directly affects the image quality of the laser projector, and Not easy to remove.

Generally, there are many ways to reduce the laser spot. The general method is to set an irregularly patterned transparent disk on the light source, and use the motor to rotate it to destroy the consistency of the laser light source, because the consistency of the laser light Continuity, disrupting consistency, needs to be dynamic, so a motor is needed to rotate the transparent disk. This structure is bulky and costly, and also reduces the intensity of the light source.

In order to solve the above problems, the industry continues to propose various solutions For related patent cases, refer to patent cases such as TW I622505, TW I367405, TW I449950, TW M 455182, TW I506299, TW I485432, TW I579591, TW I578085, etc.

In the aforementioned patent cases, most of the current head-up display device technologies have been improved, but there are still some shortcomings to be overcome, such as the inability to effectively solve the problem of uneven brightness caused by interference phenomenon, or the increased cost caused by the large structure Problems and the inability to maximize the image brightness are all technical bottlenecks to be broken through.

In view of this, the inventor of the present case has finally completed the target reflective diffuser head-up display device of the present invention after numerous studies and improvements, that is, the purpose of the invention in this case is to provide a target reflective diffuser head-up display device that can reduce interference. The display device uses the characteristic of elliptical curved surface to make the image light source reflect from any point on the diffuser to the user's eye box with the same optical path. The diffused light still maintains continuous synchronization, maintains consistent constructive interference, and maintains image brightness Consistency, no light spots, so as to reduce the uneven brightness caused by interference phenomenon, and there is no redundant structure, so the cost is low, and the image brightness can be maximized.

In order to achieve the above-mentioned object of the present invention, the target reflective diffuser head-up display device of the present invention includes: a projection module, which projects an image light source; a target reflective diffuser, the target reflective diffuser is provided There is a plane on which an array of micro-mirrors is arranged, and the image light source is projected to the target reflective diffuser, wherein the micro-mirrors have different reflection angles; It is characterized in that the micro-mirror can reflect and diffuse the projected image light source to a designed diffusion area, and the intersection of the designed diffusion areas of these micro-mirrors is an eye box, as long as the human eye is within the eye box , Can see the projected image.

The target reflective diffuser head-up display device of the present invention further includes a reflector and a concave mirror. The target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to the concave mirror. The concave mirror reflects the image light source to the position of the user's eye box.

The target reflective diffuser head-up display device of the present invention further includes a reflector, a concave mirror and a windshield. The target reflective diffuser reflects the image light source to the reflector, and the reflector 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 user's eye box position.

The micro-mirror array on the above-mentioned target reflective diffuser uses all or part of the micro-mirror to reflect the projection image, that is, the desired projection image can be achieved.

The designed diffusion areas of the micro-mirrors with different positions of the aforementioned diffusion regions can be the same or different diffusion regions.

The above-mentioned projection module is a laser light projection device, and the spot diameter of the laser beam is smaller than the micro mirror.

The target reflective diffuser head-up display device of the present invention further includes a reflector, the target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to the user's eye box position.

The target reflective diffuser head-up display device of the present invention further includes a reflector and a windshield, the target reflective diffuser reflects the image light source to the reflector, the The reflector reflects the image light source to the windshield, and the windshield reflects the image light source to the user's eye box position.

The above-mentioned reflecting mirror is a concave mirror, which can reflect and enlarge the image.

The above-mentioned windshield is provided with a reflective film with a semi-transparent and semi-reflective effect.

The target reflective diffuser head-up display device of the present invention includes: a projection module for projecting an image light source; a target reflective diffuser, the target reflective diffuser is provided with a curved surface, and the curved surface is provided with a An array of micro-mirrors, the image light source is projected to the target reflective diffuser; it is characterized in that: the micro-mirror can reflect and diffuse the projected image light source to a designed diffusion area, and the designed diffusion of the micro-mirrors The intersection of the regions is the Eye Box. As long as the human eye is within this eye box, the projected image can be seen.

The target reflective diffuser head-up display device of the present invention further includes a reflector and a concave mirror. The target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to the concave mirror. The concave mirror reflects the image light source to the position of the user's eye box.

The target reflective diffuser head-up display device of the present invention further includes a reflector, a concave mirror and a windshield. The target reflective diffuser reflects the image light source to the reflector, and the reflector 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 user's eye box position.

The micro-mirror array on the above-mentioned target reflective diffuser uses all or part of the micro-mirror to reflect the projection image, that is, the desired projection image can be achieved. The micro-mirrors in different positions of the diffusion area are designed to diffuse Area, can be the same or different diffusion areas area.

The above-mentioned projection module is a laser light projection device, and the spot diameter of the laser beam is smaller than the micro mirror.

The target reflective diffuser head-up display device of the present invention further includes a reflector, the target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to the user's eye box position.

The target reflective diffuser head-up display device of the present invention further includes a reflector and a windshield. The target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to the barrier The windshield reflects the image light source to the position of the user's eye box.

The above-mentioned reflecting mirror is a concave mirror, which can reflect and enlarge the image.

The above-mentioned windshield is provided with a reflective film with a semi-transparent and semi-reflective effect.

In the target reflective diffuser head-up display device of the present invention, the curved surface of the target reflective diffuser is an elliptical curved surface, characterized in that the projection module is placed at one of the first focal points of the elliptical curved surface, and the image light source is projected toward The elliptical curved surface of the target reflective diffuser, after the image light source is reflected, will converge on another second focus on the elliptical curved surface, and the second focus is the position of the eye box of the user.

The target reflective diffuser head-up display device of the present invention, wherein the target reflective diffuser is made into an array of micro mirrors in the same direction on a flexible flat flexible plate, and then the flexible flexible flat The plate is attached to the curved surface, and the micro-mirror on the reflective diffuser of the target can be projected to the required direction.

[Learning]

Po‧‧‧Projector

A‧‧‧Mirror

A1‧‧‧Reflecting plane

B‧‧‧Diffuser

B1‧‧‧Reflecting plane

Eo‧‧‧Eyes

〔this invention〕

1‧‧‧Projection Module

L‧‧‧Image light source

2‧‧‧Target reflective diffuser

21‧‧‧Micro mirror

211‧‧‧Reflection angle

212‧‧‧Concave mirror

213‧‧‧Convex mirror

214‧‧‧Plane mirror

E‧‧‧Eye Box

F1‧‧‧First focus

F2‧‧‧Second Focus

3‧‧‧Mirror

31‧‧‧Concave mirror

4‧‧‧Windshield

41‧‧‧Reflective film

F‧‧‧The focus is

61‧‧‧Object

62‧‧‧Erecting Virtual Image

q‧‧‧Image distance

p‧‧‧Object distance

Ho‧‧‧Object height

Hi‧‧‧Image height

The first figure is a schematic diagram of a conventional projection device.

The second figure is a schematic diagram of another embodiment of the conventional projection device.

The third figure is an enlarged schematic diagram of the micro-mirror array structure of the present invention.

The fourth figure is a schematic diagram of the size of the micro-mirror of the present invention.

Figure 5 is an enlarged schematic view of the micro-mirror of the present invention.

The sixth figure is a schematic diagram of the projection imaging of the target diffuser of the present invention.

Figure 7 is a schematic diagram of the diffusion of the micromirror of the present invention.

Figure 8 is a schematic diagram of the eye box after the micro-mirror array on the target diffuser of the present invention is diffused.

Figure 9 is a schematic diagram of the first embodiment of the present invention.

Figure 10 is another schematic diagram of the first embodiment of the present invention.

Figure 11 is another schematic diagram of the first embodiment of the present invention.

Figure 12 is a schematic diagram of the second embodiment of the present invention.

Figure 13 is another schematic diagram of the second embodiment of the present invention.

Figure 14 is another schematic diagram of the second embodiment of the present invention.

Figure 15 is a schematic diagram of an elliptical curved surface according to the second embodiment of the present invention.

Figure 16 is another schematic diagram of the elliptical curved surface according to the second embodiment of the present invention.

Figure 17 is a schematic diagram of the third embodiment of the present invention.

Figure 18 is a schematic diagram of the fourth embodiment of the present invention.

Figure 19 is a schematic diagram of the fifth embodiment of the present invention.

Figure 20 is a schematic diagram of the virtual image magnified by the concave mirror of the present invention.

Figure 21 is a schematic diagram of the sixth embodiment of the present invention.

Figure 22 is a schematic diagram of the seventh embodiment of the present invention.

Figure 23 is a schematic diagram of the eighth embodiment of the present invention.

Figure 24 is a schematic diagram of the ninth embodiment of the present invention.

As shown in the third to eleventh figures, it is the first embodiment of the target reflective diffuser head-up display device of the present invention (please refer to the figure shown in figure 9), which includes: a projection module 1 for projection Image light source L, the projection device 1 is a laser light projection device; a target reflective diffuser 2 is provided with a plane on which an array of micro-mirrors 21 is arranged, and the image light source L is projected toward the target reflective Diffusion sheet 2, in which the micro-mirrors 21 are configured with different reflection angles 211.

As shown in the third figure, the target reflective diffuser 2 is arranged in a square array or a hexagonal honeycomb array by using a plurality of micro mirrors 21.

As shown in the fourth figure, the size of each micro-mirror 21 can be 25um~0.25mm in an embodiment, but it is not limited to this.

The aforementioned micro-mirror 21 can be a concave mirror, a convex mirror or a flat mirror. As shown in FIG. 5, taking the micro-mirror 21 as an enlarged view of a concave mirror as an example, the micro-mirror 21 has an The reflection angle 211 can be directed in any direction according to the design requirements, so that the directivity of the target reflective diffuser 2 has a very high degree of freedom.

As shown in the sixth figure, the array of micro-mirrors 21 on the target reflective diffuser 2 uses all or part of the micro-mirrors 21 to reflect the projection image, that is, the desired projection image can be achieved.

As shown in Figure 7, the micro mirror 21 on the target reflective diffuser 2 can be a concave mirror 212, a convex mirror 213 or a flat mirror 214, and the micro mirror 21 can be designed according to functional requirements. The placement angle and curved surface of, thereby controlling the angle and range of diffusion, that is, when the image light source L projects the light on the micromirror 21, it will diffuse to a specific angle and range.

When the projection device 1 of the present invention is a laser light projection device, as long as the spot diameter of the laser beam is smaller than the micro-mirror 21, the same laser beam will not hit a plurality of micro-mirrors 21. Therefore, The interference phenomenon can be avoided to solve the spot problem.

As shown in the eighth figure, the present invention can further utilize a plurality of micro-mirrors 21 distributed on the target reflective diffuser 2, each micro-mirror 21 has a different angle or curved surface.

The feature of the present invention is that 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 these The intersection range of the designed diffusion area of the micromirror 21 is an eye box E (Eye Box). As long as the human eye is within the range of the eye box E, the projected image can be seen.

As shown in the ninth figure, the micro mirror 21 is a concave mirror. The micro mirrors 21 are distributed on the target reflective diffuser 2. Each of the micro mirrors 21 has a different angle. The L reflection spreads to the same range, and the overlapping range is the eye box E.

As shown in FIG. 10, the micro-mirror 21 is a convex mirror that reflects and diffuses the projected image light source L to the same range, and the overlapping range is the eye box E.

As shown in Figure 11, the micro-mirror 21 is a flat mirror, and the diffusion effect of the micro-mirror 21 is poor, so the light reflected by the target reflective diffuser 2 is relatively concentrated. The eye box E is also relatively small.

As shown in the twelfth to sixteenth figures, it is the second embodiment of the target reflective diffuser head-up display device of the present invention (please refer to the figure shown in figure twelfth), including: a projection module 1 Project an image light source L, the projection device 1 is a laser light projection device; a target reflective diffuser 2 is provided with a curved surface on which an array of micro-mirrors 21 is arranged, and the image light source L is projected toward the target Reflective diffuser 2; characterized in that the micromirror 21 reflects and diffuses the projected image light source L to a designed diffusion area, and the designed diffusion areas of the micromirrors 21 at different positions can be the same or different diffusions Area, and the intersection range of the designed diffusion area of the micro-mirrors 21 is an eye box E (Eye Box). As long as the human eye is within the eye box E, the projected image can be seen.

The target reflective diffuser 2 of the present invention can firstly fabricate an array of micro mirrors 21 in the same direction on a flexible flat flexible plate, and then attach the flexible flat flexible plate to the curved surface , The micro mirror 21 on the target reflective diffuser 2 can be projected to the required direction.

As shown in Figure 12, the micromirror 21 is a concave mirror, the micromirrors 21 are distributed on the target reflective diffuser 2, and the micromirrors 21 have different angles, which can be used to project The image light source L reflects and spreads to the same range, and the overlapping range is the eye box E.

As shown in FIG. 13, the micro mirror 21 is a convex mirror, which can reflect and diffuse the projected image light source to the same range. The overlapping range is the eye box E.

As shown in Fig. 14, the micro-mirror 21 is a flat mirror, and the diffusion effect of the micro-mirror 21 is poor. Therefore, the light reflected by the target reflective diffuser 2 is relatively concentrated. The eye box E is also relatively small.

As shown in Figure 15, the above-mentioned target reflective diffuser 2 is a curved micro-mirror 21 array, wherein the curved surface of the target reflective diffuser 2 is an elliptical curved surface, and the ellipse is two The sum of the distances of the fixed points is the trajectory of the constant points. The two fixed points are the first focus F1 and the second focus F2; the line segment that passes through the two focus points and ends on the ellipse is called the major axis and passes through the center (two The line segment that is perpendicular to the major axis and ends in the ellipse is called the minor axis. 2a is the major axis of the ellipse, and 2b is the minor axis of the ellipse. If the focal length of the ellipse is c, then a ² = b ² + c ² .

The ellipse trajectory equation is

As shown in Figure 16, according to the above elliptical trajectory equation, if light from one of the focal points of the elliptical surface (such as the first focal point F1) in any direction, it will reflect after encountering the elliptical surface, and the reflected light must Through another focus (for example, the second focus F1), and vice versa.

The present invention is characterized in that the projection module 1 is placed at one of the first focal points F1 of the elliptical curved surface of the target reflective diffuser 2, the image light source L is projected on the elliptical curved surface of the target reflective diffuser 2, and the image After the light source L is reflected, it will converge at another second focal point F2 located on the elliptical curved surface of the target reflective diffuser 2, and the second focal point F2 is the eye box E position seen by the user.

Due to the characteristic of the elliptical surface, the image light source is reflected from any point on the target reflective diffuser 2 to the eye box E seen by the user, all with the same optical path and the diffused The light still maintains continuous synchronization and consistent constructive interference, which can maintain the consistency of image brightness without light spots, which can reduce the uneven brightness caused by interference, and there is no redundant structure, so the cost is low, and the image brightness can be maximized The effect of transformation.

As shown in Figure 17, it is the third embodiment of the target reflective diffuser head-up display device of the present invention, which includes: a projection module 1 for projecting an image light source L; and a target reflective diffuser 2 , An elliptical curved surface is provided on the elliptical curved surface with an array of micro-mirrors 21, the image light source L is directed to the target reflective diffuser 2, and the target reflective diffuser 2 reflects the image light source L to the user's eyes Box E position.

The present invention is characterized in that after the image light source L is projected on the elliptical curved surface of the target reflective diffuser 2, the user's eyes are converged at another focal position of the equivalent elliptical curved surface of the target reflective diffuser 2. Box E position.

As shown in Figure 18, it is the fourth embodiment of the target reflective diffuser head-up display device of the present invention, which includes: a projection module 1 for projecting an image light source L; and a target reflective diffuser 2 , Is an array of flat or curved micro mirror 21, the image light source L is projected to the target reflective diffuser 2; a reflective mirror 3, which can be a concave mirror, a convex mirror or a flat mirror, the target reflective diffuser The 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 Figure 19, it is the fifth embodiment of the target reflective diffuser head-up display device of the present invention, including: A projection module 1 is used to project an image light source L; a target reflective diffuser 2 is provided with a plane or a curved surface, on which an array of the micromirrors 21 is arranged, and the image light source L is projected toward the Target reflective diffuser 2; a reflective mirror 3, which can be a concave mirror, a convex mirror or a flat mirror, the target reflective diffuser 2 reflects the image light source L to the reflective mirror 3; a windshield 4, the The mirror 3 reflects 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 above-mentioned 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 Figure twentieth, it is a schematic diagram of a concave mirror 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 will be imaged behind the concave mirror 31, which is For a magnified upright virtual image 62, its magnification can be derived from the ratio of the image distance q to the object distance p (the magnification can also be derived from the ratio of the object height Ho to the imaging height Hi); if the object 61 is closer to the focus F , The greater the magnification; if the object 61 is placed on the focal point F, the imaging is at infinity.

As shown in Figure 21, it is the sixth embodiment of the target reflective diffuser head-up display device of the present invention, including: a projection module 1 for projecting an image light source L; and a target reflective diffuser Sheet 2 is provided with a flat surface or a curved surface, and an array of the micro mirror 21 is arranged on the flat surface or the curved surface. The image light source L is projected to the target reflective diffuser 2; a concave mirror 31, the target reflective diffuser 2 Reflect the image light source L to the concave mirror 31, and the concave mirror 31 reflects and amplifies the image light source L to the position of the eye box E of the user.

As shown in Figure 22, it is the seventh embodiment of the target reflective diffuser head-up display device of the present invention, including: a projection module 1 for projecting an image light source L; and a target reflective diffuser 2. A flat surface or a curved surface is provided, and an array of the micro mirror 21 is arranged on the flat surface or the curved surface, and the image light source L is projected to the target reflective diffuser 2; a concave mirror 31, the target reflective diffuser 2 Reflect the image light source L to the concave mirror 31; a windshield 4, the concave mirror 31 reflects and amplifies the image light source L to the windshield 4, the windshield 4 reflects the image light source L to the position of the user's eye box E .

The above-mentioned 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 Figure 23, it is the eighth embodiment of the target reflective diffuser head-up display device of the present invention, including: a projection module 1 for projecting an image light source L; and a target reflective diffuser 2. There is a plane or a curved surface, and an array of the micro mirror 21 is arranged on the plane or the curved surface. The image light source L is projected to the target reflective diffuser 2; a reflecting mirror 3 can be a concave mirror or a convex mirror Or a flat mirror, the target reflective diffuser 2 reflects the image light source L to the reflector 3; a concave mirror 31, the reflector 3 reflects the image light source L to the concave mirror 31, the concave mirror 31 reflects and amplifies the image light source L to the user's eye box E position.

As shown in Figure 24, it is the ninth embodiment of the target reflective diffuser head-up display device of the present invention, including: A projection module 1, which projects an image light source L; a target reflective diffuser 2, the target reflective diffuser 2 is provided with a plane or a curved surface, and the micro-mirror 21 is provided on the plane or curved surface Array, the image light source L is directed to the target reflective diffuser 2; a reflector 3, which can be a concave mirror, a convex mirror or a flat mirror, the target reflective diffuser 2 reflects the image light source L to the mirror 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 amplifies the image light source to the windshield 4, the windshield 4 reflects the image light source L to the user's eye box E position.

The above-mentioned 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 target reflective diffuser head-up display device of the present invention can solve the problem of uneven brightness caused by interference phenomenon, and there is no redundant structure, so the cost is low, and the image brightness can be maximized. , It can effectively solve the deficiencies of habit, and the technical means used are not available in the prior art, so the invention has the novelty and advancement elements of the patent.

The specific embodiments proposed in the content of the present invention are only used to facilitate the description of the technical content of the present invention, rather than restricting the present invention to the above-mentioned embodiments in a narrow sense. Anything that does not exceed the spirit of the present invention and the following patent applications In the case of scope, various changes and implementations made still belong to the scope of the present invention.

1‧‧‧Projection Module

L‧‧‧Image light source

2‧‧‧Target reflective diffuser

21‧‧‧Micro mirror

E‧‧‧Eye Box

Claims (9)

A target reflective diffuser head-up display device includes: a projection module for projecting an image light source; a target reflective diffuser, the target reflective diffuser is provided with a curved surface, and the curved surface is provided with a micro-surface An array of mirrors, the image light source is projected to the target reflective diffuser; it is characterized in that: the micro mirror can reflect and diffuse the projected image light source to a designed diffusion area, and the designed diffusion area of these micro mirrors The intersection range is the Eye Box. As long as the human eye is within the eye box, the projected image can be seen; among them, the curved surface of the target reflective diffuser is an elliptical curved surface, and the projection module is installed At one of the first focal points of the elliptical curved surface, the image light source is projected on the elliptical curved surface of the target reflective diffuser. After reflection, the image light source will be concentrated on the other second focal point on the elliptical curved surface. The second focus is used The position of the eye box. The target reflective diffuser head-up display device described in item 1 of the scope of patent application further includes a reflector and a concave mirror. The target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the The image light source reaches the concave mirror, and the concave mirror reflects the position of the user's eye box of the image light source. The target reflective diffuser head-up display device described in the first item of the scope of patent application further includes a reflector, a concave mirror and a windshield. The target reflective diffuser reflects the image light source to the reflector The reflecting mirror reflects the image light source to the concave mirror, the concave mirror reflects to the windshield, and the windshield reflects the image light source to the user's eye box position. The target reflective diffuser head-up display device described in the first item of the scope of patent application, wherein the micromirror array on the target reflective diffuser uses all or part of the micromirror to reflect the projection image, that is, To achieve the desired projection image, the designed diffusion areas of the micro mirrors at different positions of the diffusion area can be the same or different diffusion areas. The target reflective diffuser head-up display device described in the first item of the scope of patent application, wherein the projection module is a laser light projection device, and the laser beam of the laser light projection device has a smaller spot diameter than the micro mirror. The target reflective diffuser head-up display device described in item 1 of the scope of patent application further includes a reflector, the target reflective diffuser reflects the image light source to the reflector, and the reflector reflects the image light source to The position of the user's eye box. The target reflective diffuser head-up display device described in item 1 of the scope of patent application further includes a reflector and a windshield. The target reflective diffuser reflects the image light source to the reflector, and the reflector The image light source is reflected to the windshield, and the windshield reflects the image light source to the user's eye box position. The target reflective diffuser head-up display device described in item 7 of the scope of patent application, wherein the reflector is a concave mirror that can reflect and magnify the image, and the windshield is provided with a reflector with a semi-transparent and semi-reflective effect membrane. The target reflective diffuser head-up display device described in the first item of the scope of patent application, wherein the target reflective diffuser can be made into an array of micro mirrors in the same direction on a flexible flat flexible plate, Then, the flexible flat flexible plate is attached to the curved surface, and the micro-mirror on the target reflective diffuser can be projected to the required direction.

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