CN106707529B - Display device - Google Patents

Abstract

The present invention discloses a display device, comprising a projection lens, a Fresnel lens, an angle magnification screen, a vertical diffusion plate and a first micro-light deflection plate. The projection lens provides an initial image. The first micro-light deflection plate is sandwiched between the Fresnel lens and the angle magnification screen, and the angle magnification screen is sandwiched between the first micro-light deflection plate and the vertical diffusion plate. The initial image is deflected by the first micro-light deflection plate to become a first viewing angle image and a second viewing angle image, and the viewing angle directions of the first viewing angle image and the second viewing angle image are different.

Description

display device

technical field

The present invention relates to a display device, in particular to a stereoscopic display device.

Background technique

In recent years, in order to pursue more realistic and closer to the real images, display technology has been continuously innovated to meet the needs of observers. From the pursuit of resolution and color in the initial flat display, in recent years, the three-dimensional display device can further provide the observer with a three-dimensional experience in addition to the image.

The main working principle of stereoscopic display is to feed images of objects viewed from different angles to the left and right eyes. According to the visual characteristics of the human eye, when both eyes view two images of the same image content but with different parallaxes, the observer will Feel that the object you see has a sense of layering and depth, so as to feel a three-dimensional three-dimensional image.

In terms of application, it can be roughly divided into two ways of viewing with additional glasses or direct naked vision. In recent years, the more important technological development is the latter. According to the different feeding methods, it is further subdivided into time-domain multitasking and spatial multitasking.

1 is a schematic diagram of a projection stereoscopic display device 1 adopting a spatial multitasking mode in the prior art. As shown in the figure, the projection stereoscopic display device 1 adopting a spatial multitasking mode in the prior art includes a backlight 11 , a display device 12 and a Lens array 13 . The lenses 14 of the lens array 13 direct the output pixels of the pixels 15', 15", 15"' to three different spatial positions 16', 16", 16"'. In a similar manner, the lens 14' of the lens array 13 also directs the output of the pixels 15', 15", 15"' to three different spatial positions 17', 17", 17"'.

FIG. 2 is a schematic diagram of a projection stereoscopic image display device using a time-domain multitasking mode in the prior art. As shown in the figure, the display device 2 includes a light source 21 , a polarizer 23 , a rotating polygon mirror 25 , a panel 27 and several optical elements 29 . The light source 21 generates a light beam, and the light beam is first polarized by the polarizer 23, and then reflected by the rotating polygon mirror 25 to the panel 27 for imaging, resulting in a similar scanning effect. The subsequent optical elements 29 project images from different angles to different observation areas in different time sequences. To be more specific, the light source 21 sequentially generates the first viewing angle image, the second viewing angle image, the third viewing angle image and the fourth viewing angle image on the viewing area adjacent to the panel 27, but such a projection type stereoscopic image display device needs to use the The rotating polygon mirror 25 rotates, and the rotation mode of the polygon mirror 25 is mostly mechanical operation, which is likely to generate a lot of noise due to friction. And if there are many divided viewing angles, at this time, the rotation speed of the rotating polygon mirror 25 needs to be increased, so that the aforementioned disadvantages will be more significant.

In fact, regardless of whether the spatial multitasking mode (spatial multiplex) or the time domain multitasking mode (time multiplexing) is used alone to achieve the stereoscopic display effect, there are shortcomings and problems to be overcome. Based on this, how to design a stereoscopic image display device with the advantages of low cost, simplified optical configuration and high resolution is an urgent goal of the industry.

SUMMARY OF THE INVENTION

In order to solve the problems of the prior art, the present invention provides a display device, which includes a projection lens, a Fresnel lens, an angle magnifying screen, a vertical diffusion plate and a first micro-light deflecting plate. The projection lens provides an initial image. The first micro-light deflecting plate is sandwiched between the Fresnel lens and the angle magnifying screen, and the angle magnifying screen is sandwiched between the first micro-light deflecting plate and the vertical diffusion plate. The initial image A first view angle image and a second view angle image are turned by the first micro-light deflecting plate, and the view angle directions of the first view angle image and the second view angle image are different.

In one embodiment, the first micro-light deflection plate includes a first light deflection area and a second light deflection area, and the initial image passes through the first light deflection area and the second light deflection area and are turned to become the first view angle image and the second view angle image.

In one embodiment, the first light deflection area and the second light deflection area are arranged along a first direction, and the first direction is a horizontal direction.

In one embodiment, the first light deflection area and the second light deflection area are arranged along a first direction, and an included angle between the first direction and a horizontal direction is 45 degrees.

In one embodiment, the display device further includes a second micro-light deflecting plate, wherein the second micro-light deflecting plate is sandwiched between the first micro-light deflecting plate and the angle magnifying screen, the first A viewing angle image is turned by the second micro-light deflecting plate to become a first sub-view image and a second sub-view image, and the second viewing angle image is turned by the second micro-light deflecting plate to become a third sub-view A viewing angle image and a fourth sub viewing angle image, wherein the viewing angle directions of the first sub viewing angle image, the second sub viewing angle image, the third sub viewing angle image and the fourth sub viewing angle image are all different.

In one embodiment, the second micro-light deflecting plate includes a first sub-light deflecting region and a second sub-light deflecting region, and the first viewing angle image passes through the first sub-light deflecting region and the first sub-light deflecting region. The two sub-light deflection regions are turned into the first sub-view image and the second sub-view image, and the second sub-view image is turned through the first sub-light deflecting region and the second sub-light deflecting region become the third sub-perspective image and the fourth sub-perspective image.

In one embodiment, the first light deflection area and the second light deflection area are arranged along a first direction, and the first sub light deflection area and the second sub light deflection area are arranged along a second direction Arrangement, the included angle between the first direction and the second direction is 45 degrees.

In one embodiment, the light deflection ability of the first light deflection region and the second light deflection region is (-2, +2), and the first sub light deflection region and the second sub light deflection region are The light deflection ability of the folded region is (-1,+1).

In one embodiment, the first micro light deflection plate further includes a third light deflection area, the second micro light deflection plate further includes a third sub light deflection area, and the first light deflection area , The second light deflection area and the third light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area and the third sub light deflection area are along A second direction is arranged, and the included angle between the first direction and the second direction is 45 degrees.

In one embodiment, the light deflection powers of the first light deflection area, the second light deflection area, and the third light deflection area are (-3, 0, +3), and the first sub-light The light deflection capabilities of the deflection region, the second sub-light deflection region, and the third sub-light deflection region are (-1, 0, +1).

In one embodiment, the second micro-light deflecting plate further includes a third sub-light deflecting region and a fourth sub-light deflecting region, the first light deflecting region and the second light deflecting region are Arranged in a first direction, the first sub-light deflecting region, the second sub-light deflecting region, the third sub-light deflecting region and the fourth sub-light deflecting region are arranged in a second direction, the first sub-light deflecting region The included angle between one direction and the second direction is 45 degrees.

In one embodiment, the light deflection ability of the first light deflection region and the second light deflection region is (-4, +4), and the first sub light deflection region and the second sub light deflection region are The light deflection capabilities of the folding region, the third sub-light deflecting region and the fourth sub-light deflecting region are (-3, -1, +1, +3).

The present invention also provides a display device comprising a projection lens, a first micro-light deflecting plate and a second micro-light deflecting plate. The projection lens provides an initial image. The initial image is turned by the first micro-light deflecting plate to become a first view angle image and a second view angle image, and the view angle directions of the first view angle image and the second view angle image are different. The first viewing angle image is turned by the second low-light deflecting plate to become a first sub-viewing angle image and a second sub-viewing angle image, and the second viewing angle image is turned by the second low-light deflecting plate to become a first sub-viewing angle image Three sub-perspective images and a fourth sub-perspective image, wherein the viewing angles of the first sub-perspective image, the second sub-perspective image, the third sub-perspective image and the fourth sub-perspective image are all different.

By applying the low-light deflecting plate and the configuration method thereof according to the embodiments of the present invention, the viewing angle image of the display device can be multiplied, thereby providing a high-resolution stereoscopic image. In particular, the low-light deflecting plate and the configuration thereof of the embodiments of the present invention can be used in a display device designed in a time-domain multitasking mode to achieve spatial multiplexing and time-domain multitasking. The effect of the task mode (time multiplex) integration.

Description of drawings

FIG. 1 is a schematic diagram of a projection stereoscopic display device 1 using a spatial multitasking mode in the prior art.

FIG. 2 is a schematic diagram of a projection stereoscopic image display device using a time-domain multitasking mode in the prior art.

FIG. 3 shows a display device according to the first embodiment of the present invention.

FIG. 4A shows a first micro light deflecting plate according to an embodiment of the present invention.

FIG. 4B shows a first micro light deflecting plate according to another embodiment of the present invention.

FIG. 4C shows the design principle of the first micro-light deflecting plate according to the embodiment of the present invention.

FIG. 5A shows a detailed structure of a first micro light deflecting plate according to an embodiment of the present invention.

FIG. 5B shows the effect of the first micro light deflecting plate according to an embodiment of the present invention.

FIG. 5C shows the effect of the first micro light deflecting plate according to another embodiment of the present invention.

FIG. 6 shows a display device according to a second embodiment of the present invention.

FIG. 7 shows a display device according to a third embodiment of the present invention.

FIG. 8 shows a display device according to a fourth embodiment of the present invention.

Among them, reference numerals:

1～Display device

11～Backlight

12～Display device

13～Lens array

14, 14'～Lens

15', 15", 15"'～pixel

16', 16", 16"'～spatial position

17', 17", 17"'～spatial position

2～Display device

21～Light source

23～Polarizer

25～Rotating polygon mirror

27～Panel

29～Optical components

100～Display device

110～Projection lens

120～Fresnel lens

130～Angle zoom screen

140～vertical diffuser

150, 150'～the first micro light deflection plate

151～First light deflection area

152～Second light deflection area

153～Third light deflection area

161～First sub-light deflection region

162～Second sub-light deflection region

163～Third sub-light deflection region

164 to the fourth sub-light deflection region

190～initial image

191～First Angle Video

192～Second angle video

Detailed ways

Referring to FIG. 3 , the display device 100 according to the first embodiment of the present invention is shown, including a projection lens 110 , a Fresnel lens 120 , an angle magnifying screen 130 , a vertical diffusion plate 140 and a first Low light deflecting plate 150 . The projection lens provides an initial image. The first micro-light deflecting plate 150 is sandwiched between the Fresnel lens 120 and the angle magnifying screen 130 , and the angle magnifying screen 130 is sandwiched between the first micro-light deflecting plate 150 and the vertical diffusion plate 140 During this time, the initial image is turned by the first low-light deflecting plate 150 to become a first-view image and a second-view image, and the viewing-angle directions of the first-view image and the second-view image are different.

Referring to FIGS. 4A and 4B , FIG. 4A shows a first micro-light deflecting plate 150 according to an embodiment of the present invention. In this embodiment, the light deflecting ability of the first micro-light deflecting plate 150 is (-1,+ 1). FIG. 4B shows the first micro light deflecting plate 150 ′ according to another embodiment of the present invention. In this embodiment, the light deflecting ability of the first micro light deflecting plate 150 ′ is (-1, 0, +1 ). Referring to FIG. 4C, the light deflection ability can be designed by the following formula:

Among them, θ1 represents the acute angle on the right side, θ2 represents the acute angle on the left side, Wm represents the width of the bottom surface, n represents the refractive index, Φi represents the incident light angle, and Φo represents the outgoing light angle.

5A, 5B and 5C, in one embodiment, the first micro-light deflection plate 150 includes a first light deflection area 151 and a second light deflection area 152, the initial image 190 (including a plurality of The pixel image) passes through the first light deflection area 151 and the second light deflection area 152 and is turned into the first viewing angle image and the second viewing angle image. In this embodiment, the first light deflection area 151 and the second light deflection area 152 are arranged along a first direction, and the included angle between the first direction and a horizontal direction is 45 degrees. In a modified example, the first light deflection area 151 and the second light deflection area 152 are arranged along a first direction, and the first direction is a horizontal direction. Referring to FIGS. 5B and 5C, it shows the configuration effect of the first micro-light deflecting plate 150 in FIG. 5A, wherein, based on the configuration of the first micro-light deflecting plate 150, the initial image 190 is turned to become a first A viewing angle image 191 and a second viewing angle image 192 . In this embodiment, a quarter of the initial image 190 (here, the upper right corner and the lower left corner of one pixel are taken as an example) can be blocked by a mask. In this embodiment, the vertical turning effect will be diffused and eliminated by the vertical diffusion plate 140 .

By applying the low-light deflecting plate and the configuration method thereof according to the embodiments of the present invention, the viewing angle image of the display device can be multiplied, thereby providing a high-resolution stereoscopic image. In particular, the low-light deflecting plate and the configuration thereof of the embodiments of the present invention can be used in a display device designed in a time-domain multitasking mode to achieve spatial multiplexing and time-domain multitasking. The effect of the task mode (time multiplex) integration.

Referring to FIG. 6 , it is a display device according to a second embodiment of the present invention, which further includes a second micro-light deflecting plate 160 , which is superimposed on the first micro-light deflecting plate 150 , and the second micro-light deflecting plate 160 It includes a first sub-light deflecting region 161 and a second sub-light deflecting region 162, and the first-view image is turned into a first sub-light deflecting region through the first sub-light deflecting region and the second sub-light deflecting region A sub-perspective image and a second sub-perspective image, the second sub-perspective image is turned into a third sub-perspective image and a fourth sub-perspective through the first sub-optical deflection area and the second sub-optical deflection area Perspective image. The first sub-light deflection area 161 and the second sub-light deflection area 162 are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. In one embodiment, the light deflection ability of the first light deflection region 151 and the second light deflection region 152 is (-2, +2), the first sub light deflection region 161 and the second light deflection region 152 are The light deflection ability of the sub light deflection region 162 is (-1, +1). Therefore, the light deflection power of (-3,-1,+1,+3) is generated. In the above sequence, the difference of the light deflection power received by each pixel is 2, so the above design provides uniform light deflection effect. With this embodiment, the viewing angle image is increased by four times.

7 , which shows a display device according to a third embodiment of the present invention, wherein the first micro-light deflecting plate 150 further includes a third light-deflecting region 153 , and the second micro-light deflecting plate 160 further includes A third sub-light deflection area 163, the first light deflection area 151, the second light deflection area 152 and the third light deflection area 153 are arranged along a first direction, the first sub-light deflection area The region 161 , the second sub-light deflection region 162 and the third sub-light deflection region 163 are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. In one embodiment, the light deflection ability of the first light deflection area 151 , the second light deflection area 152 and the third light deflection area 153 is (-3, 0, +3), the first light deflection The light deflection capabilities of the first sub-light deflection region 161 , the second sub-light deflection region 162 and the third sub-light deflection region 163 are (-1, 0, +1). Therefore, the light deflection ability of (-4,-3,-2,-1,0,+1,+2,+3,+4) is generated. In the above sequence, the light deflection ability of each pixel is The difference is 1, so the above design provides a uniform light deflection effect. With this embodiment, the viewing angle image is increased by nine times.

Referring to FIG. 8 , which shows a display device according to a fourth embodiment of the present invention, wherein the second micro-light deflecting plate 160 further includes a third sub-light deflecting region 163 and a fourth sub-light deflecting region 164 , The first light deflection area 151 and the second light deflection area 152 are arranged along a first direction, the first sub light deflection area 161 , the second sub light deflection area 162 , and the third sub light deflection area The folding area 163 and the fourth sub-light deflection area 164 are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. In one embodiment, the light deflection ability of the first light deflection region 151 and the second light deflection region 152 is (-4, +4). The light deflection capabilities of the sub-light deflection region 162 , the third sub-light deflection region 163 and the fourth sub-light deflection region 164 are (-3, -1, +1, +3). Therefore, the light deflection ability of (-7,-5,-3,-1,+1,+3,+5,+7) is generated. In the above sequence, the difference of light deflection ability received by each pixel The value is 2, so the above design provides a uniform light deflection effect. With this embodiment, the viewing angle image is increased by eight times.

Although the present invention has been disclosed above with specific preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can still make some changes without departing from the spirit and scope of the present invention. However, these corresponding changes and modifications should be included in the protection scope of the appended claims of the present invention.

Claims (27)

1. A display device, characterized in that, comprising: a projection lens, providing an initial image; a Fresnel lens; Enlarge the screen at an angle; a vertical diffuser: and a first micro-light deflecting plate; Wherein, the first micro-light deflecting plate is sandwiched between the Fresnel lens and the angle magnifying screen, and the angle magnifying screen is sandwiched between the first micro-light deflecting plate and the vertical diffusion plate, the The initial image is turned by the first low-light deflecting plate to become a first-view image and a second-view image. The first-view and second-view images have different viewing directions, and the first low-light is deflected. the folding plate includes a first light deflection area and a second light deflection area; A second micro-light deflecting plate, the second micro-light deflecting plate is sandwiched between the first micro-light deflecting plate and the angle magnifying screen, and the second micro-light deflecting plate includes a first sub-light deflecting plate a folding region and a second sub-light deflecting region; Wherein, the light deflection ability of the first light deflection area and the second light deflection area is (-2, +2), and the light of the first sub light deflection area and the second sub light deflection area The deflection ability is (-1,+1). 2 . The display device of claim 1 , wherein the initial image is turned into the first viewing angle image and the second viewing angle image through the first light deflection area and the second light deflection area. 3 . . 3 . The display device of claim 2 , wherein the first light deflection area and the second light deflection area are arranged along a first direction, and the first direction is a horizontal direction. 4 . 4 . The display device of claim 2 , wherein the first light deflection area and the second light deflection area are arranged along a first direction, and the first direction and a horizontal direction are sandwiched between the first direction and a horizontal direction. 5 . The angle is 45 degrees. 5 . The display device of claim 2 , wherein the first viewing angle image is deflected by the second micro-light deflecting plate to become a first sub viewing angle image and a second sub viewing angle image, the second The viewing angle image is turned by the second low-light deflecting plate to become a third sub viewing angle image and a fourth sub viewing angle image, wherein the first sub viewing angle image, the second sub viewing angle image, and the third sub viewing angle image are And the viewing angle directions of the fourth sub-perspective images are different. 6 . The display device as claimed in claim 5 , wherein the first viewing angle image is turned to become the first sub viewing angle image through the first sub-light deflection region and the second sub-light deflection region. 7 . The second sub-view image, the second sub-view image is turned into the third sub-view image and the fourth sub-view image through the first sub-light deflection area and the second sub-light deflection area. 7 . The display device of claim 6 , wherein the first light deflection region and the second light deflection region are arranged along a first direction, and the first sub light deflection region and the second light deflection region are arranged in a first direction. 8 . The sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 8 . The display device of claim 6 , wherein the first micro-light deflecting plate further comprises a third light-deflecting region, and the second micro-light deflecting plate further comprises a third sub-light deflecting region. 9 . folding area, the first light deflection area, the second light deflection area and the third light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area and the third sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 9 . The display device of claim 6 , wherein the second micro-light deflecting plate further comprises a third sub-light deflecting region and a fourth sub-light deflecting region, the first light deflecting region area and the second light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area, the third sub light deflection area and the fourth sub light deflection area The regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 10. A display device, comprising: a projection lens, providing an initial image; a Fresnel lens; Enlarge the screen at an angle; a vertical diffuser: and a first micro-light deflecting plate; Wherein, the first micro-light deflecting plate is sandwiched between the Fresnel lens and the angle magnifying screen, and the angle magnifying screen is sandwiched between the first micro-light deflecting plate and the vertical diffusion plate, the The initial image is turned by the first low-light deflecting plate to become a first-view image and a second-view image. The first-view and second-view images have different viewing directions, and the first low-light is deflected. the folding plate includes a first light deflection area and a second light deflection area; A second micro-light deflecting plate, the second micro-light deflecting plate is sandwiched between the first micro-light deflecting plate and the angle magnifying screen, and the second micro-light deflecting plate includes a first sub-light deflecting plate a folding region and a second sub-light deflecting region; Wherein, the first micro light deflection plate further includes a third light deflection area, the second micro light deflection plate further includes a third sub light deflection area, the first light deflection area, the second light deflection area The light deflection ability of the light deflection area and the third light deflection area is (-3, 0, +3), the first sub light deflection area, the second sub light deflection area and the third sub light deflection area The light deflection ability of the light deflection region is (-1, 0, +1). 11 . The display device of claim 10 , wherein the initial image is turned into the first viewing angle image and the second viewing angle image through the first light deflection area and the second light deflection area. 12 . . 12 . The display device of claim 11 , wherein the first light deflection area and the second light deflection area are arranged along a first direction, and the first direction is a horizontal direction. 13 . 13 . The display device as claimed in claim 11 , wherein the first light deflection region and the second light deflection region are arranged along a first direction, and the first direction and a horizontal direction are sandwiched between the first direction and a horizontal direction. 14 . The angle is 45 degrees. 14 . The display device of claim 11 , wherein the first viewing angle image is turned by the second micro-light deflecting plate to become a first sub viewing angle image and a second sub viewing angle image, the second sub viewing angle image The viewing angle image is turned by the second low-light deflecting plate to become a third sub viewing angle image and a fourth sub viewing angle image, wherein the first sub viewing angle image, the second sub viewing angle image, and the third sub viewing angle image are And the viewing angle directions of the fourth sub-perspective images are different. 15 . The display device of claim 14 , wherein the first viewing angle image is turned into the first sub viewing angle image through the first sub-light deflection region and the second sub-light deflection region. The second sub-view image, the second sub-view image is turned into the third sub-view image and the fourth sub-view image through the first sub-light deflection area and the second sub-light deflection area. 16. The display device of claim 14, wherein the first light deflection region and the second light deflection region are arranged along a first direction, the first sub light deflection region and the second light deflection region The sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 17 . The display device of claim 14 , wherein the first light deflection area, the second light deflection area and the third light deflection area are arranged along a first direction, and the first sub-region is 17 . The light deflection area, the second sub light deflection area and the third sub light deflection area are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 18. A display device, comprising: a projection lens, providing an initial image; A first low-light deflecting plate, wherein the initial image is turned by the first low-light deflecting plate to become a first-view image and a second-view image, and the first-view image and the second-view image are The viewing angles are all different, and the first micro-light deflection plate includes a first light deflection area and a second light deflection area; and A second low-light deflecting plate, wherein the first viewing angle image is turned by the second low-light deflecting plate to become a first sub-viewing angle image and a second sub-viewing angle image, and the second viewing angle image is turned by the first sub-viewing angle image. The two low-light deflection plates are turned to form a third sub-view image and a fourth sub-view image, wherein the first sub-view image, the second sub-view image, the third sub-view image and the fourth sub-view image The viewing angle directions of the viewing angle images are all different, and the second micro-light deflecting plate includes a first sub-light deflecting area and a second sub-light deflecting area; Wherein, the light deflection ability of the first light deflection area and the second light deflection area is (-2, +2), and the light of the first sub light deflection area and the second sub light deflection area The deflection ability is (-1,+1). 19 . The display device of claim 18 , wherein the initial image is turned into the first viewing angle image and the second viewing angle image through the first light deflection area and the second light deflection area. 20 . , the first viewing angle image is turned into the first sub viewing angle image and the second sub viewing angle image through the first sub light deflection area and the second sub light deflection area, and the second viewing angle image passes through the first sub viewing angle image. A sub-light deflection area and the second sub-light deflection area are turned to become the third sub-view image and the fourth sub-view image. 20 . The display device of claim 19 , wherein the first light deflection region and the second light deflection region are arranged along a first direction, and the first sub light deflection region and the second light deflection region are arranged along a first direction. 21 . The sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 21. The display device as claimed in claim 19, wherein the first micro-light deflecting plate further comprises a third light-deflecting region, and the second micro-light deflecting plate further comprises a third sub-light deflecting plate folding area, the first light deflection area, the second light deflection area and the third light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area and the third sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 22 . The display device of claim 19 , wherein the second micro-light deflecting plate further comprises a third sub-light deflecting region and a fourth sub-light deflecting region, the first light deflecting region 22 . area and the second light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area, the third sub light deflection area and the fourth sub light deflection area The regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 23. A display device, comprising: a projection lens, providing an initial image; A first low-light deflecting plate, wherein the initial image is turned by the first low-light deflecting plate to become a first-view image and a second-view image, and the first-view image and the second-view image are The viewing angles are all different, and the first micro-light deflection plate includes a first light deflection area and a second light deflection area; and A second low-light deflecting plate, wherein the first viewing angle image is turned by the second low-light deflecting plate to become a first sub-viewing angle image and a second sub-viewing angle image, and the second viewing angle image is turned by the first sub-viewing angle image. The two low-light deflection plates are turned to form a third sub-view image and a fourth sub-view image, wherein the first sub-view image, the second sub-view image, the third sub-view image and the fourth sub-view image The viewing angle directions of the viewing angle images are all different, and the second micro-light deflecting plate includes a first sub-light deflecting area and a second sub-light deflecting area; Wherein, the first micro light deflection plate further includes a third light deflection area, the second micro light deflection plate further includes a third sub light deflection area, the first light deflection area, the second light deflection area The light deflection ability of the light deflection area and the third light deflection area is (-3, 0, +3), the first sub light deflection area, the second sub light deflection area and the third sub light deflection area The light deflection ability of the light deflection region is (-1, 0, +1). 24. The display device of claim 23, wherein the initial image is turned into the first viewing angle image and the second viewing angle image through the first light deflection area and the second light deflection area , the first viewing angle image is turned into the first sub viewing angle image and the second sub viewing angle image through the first sub light deflection area and the second sub light deflection area, and the second viewing angle image passes through the first sub viewing angle image. A sub-light deflection area and the second sub-light deflection area are turned to become the third sub-view image and the fourth sub-view image. 25. The display device of claim 24, wherein the first light deflection region and the second light deflection region are arranged along a first direction, the first sub light deflection region and the second light deflection region The sub-light deflection regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 26. The display device of claim 24, wherein the first light deflection area, the second light deflection area, and the third light deflection area are arranged along a first direction, and the first sub-area The light deflection area, the second sub light deflection area and the third sub light deflection area are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees. 27. The display device as claimed in claim 26, wherein the second light micro-deflection plate further comprises a third sub-light deflecting region and a fourth sub-light deflecting region, the first light deflecting region area and the second light deflection area are arranged along a first direction, the first sub light deflection area, the second sub light deflection area, the third sub light deflection area and the fourth sub light deflection area The regions are arranged along a second direction, and the included angle between the first direction and the second direction is 45 degrees.