TW201415085A - Stereoscopic display - Google Patents

Abstract

A stereoscopic display including a backlight module, a display panel, a light-controlling element and a switching element is provided. The backlight module includes a light source and a light guide plate. The light guide plate has a light incident surface and a light emitting surface. A light beam emitted by the light source enters the light guide plate through the light incident surface, and leaves the light guide plate through the light emitting surface. The light-controlling element is disposed between the display panel and the light guide plate. The light-controlling element includes a plurality of light-controlling surface groups. Each of the light-controlling surface groups has a first surface and a second surface opposite to each other. The first surfaces and the second surfaces of the light-controlling surface groups are arranged along a first direction substantially parallel to the light emitting surface. At least one of the first surface and the second surface inclines with respect to the light emitting surface by over 90 degree. The switching element is configured to switch to a light transmitting mode or a light scattering mode.

Description

Stereoscopic display device

The present invention relates to a display device, and more particularly to a stereoscopic display device.

In recent years, with the continuous advancement of display technology, users have become more and more demanding on the display quality of displays (such as image resolution, color saturation, etc.). However, in addition to high image resolution and high color saturation, in order to satisfy the user's need to view real images, a display capable of displaying stereoscopic images has also been developed.

A stereoscopic image display technology developed at present mainly uses a parallax barrier to control images received by the viewer's left and right eyes. According to the visual characteristics of the human eye, when the left and right eyes respectively view the same image content, but have different parallax images, the human eye will view a stereoscopic image. Generally, the stereoscopic display device is configured such that a barrier is disposed between the display panel and the human eye to allow the human eye to view a stereoscopic image.

However, the main purpose of the grating is its light-shielding effect, which means that the light is absorbed and cannot be reused, and as a result, the light utilization efficiency of the stereoscopic display device is severe. Therefore, how to improve the light utilization efficiency while taking into consideration the display quality of the stereoscopic display device is a major issue in the current stereoscopic display device.

One embodiment of the present invention provides a stereoscopic display device. The stereoscopic display device comprises a backlight module, a display panel, a light control element and a switching element. The backlight module includes a light source and a light guide. The light guide plate has a light incident surface and a light exit surface. The light beam emitted from the light source enters the light guide plate from the light entrance surface and exits the light guide plate from the light exit surface. The light control element is disposed between the display panel and the light guide plate. The light control element includes a plurality of light control surface groups. Each of the light control surface groups has a first surface and a second surface opposite to each other. The first surface and the second surface of the set of light control surfaces are aligned along a first direction that is substantially parallel to the light exit surface. At least one of the first surface and the second surface is inclined with respect to the light exiting surface by more than 90 degrees. The switching element is used to switch between a light penetration mode and a light scattering mode.

Another embodiment of the present invention provides a stereoscopic display device. The stereoscopic display device comprises a backlight module, a display panel, a light control element, a light valve and a control unit. The backlight module includes a light source and a light guide. The light source is used to emit a light beam. The light guide plate has a light incident surface and a light exit surface. The light beam enters the light guide plate from the light entrance surface and exits the light guide plate from the light exit surface. The light control element is disposed between the display panel and the light guide plate. The light control element includes a plurality of light control surface groups. Each of the light control surface groups has an opposing first surface and a second surface. The first surface and the second surface of the set of light control surfaces are aligned along a first direction that is substantially parallel to the light exit surface. At least one of the first surface and the second surface is inclined with respect to the light exiting surface by more than 90 degrees. The light coupling element is disposed between the light guide plate and the light control element. The light valve is disposed between the light guide plate and the display panel. The light valve has a plurality of working areas respectively corresponding to the light control surface group. When any of the work areas is turned on, a portion of the light beam from the illumination source is transmitted to the display panel via the work area. Partial beam from the source of illumination when any of the workspaces is closed Cannot be passed to the display panel via the workspace. The control unit is electrically connected to the display panel and the light valve. These jobs are divided into multiple workspace groups. The control unit opens different work area groups at different points in time.

Yet another embodiment of the present invention provides a stereoscopic display device. The stereoscopic display device includes a backlight module, a display panel, and a light control element. The backlight module includes a light source and a light guide. The light source is used to emit a light beam. The light guide plate has a light incident surface and a light exit surface. The light beam enters the light guide plate from the light entrance surface and exits the light guide plate from the light exit surface. The light control element is disposed between the display panel and the light guide plate. The light control element includes a plurality of light control surface groups. Each of the light control surface groups has a first surface and a second surface. The first surface is inclined by a first angle with respect to the light exit surface of the light guide plate. The second surface is inclined at a second angle with respect to the light exit surface of the light guide plate. At least one of the first angle and the second angle falls within a range of 110 degrees to 120 degrees.

In order to make the above-described features of the present invention more comprehensible, the following detailed description of the embodiments will be described in detail below.

First embodiment

1 is a cross-sectional view showing a stereoscopic display device according to a first embodiment of the present invention. Referring to FIG. 1 , the stereoscopic display device 1000 of the present embodiment includes a backlight module 100 , a display panel 200 , and a light control component 300 . The display panel 200 is disposed on the backlight module 100. The light control element 300 is disposed between the display panel 200 and the light guide plate 120 of the backlight module 100. In this embodiment, the display panel 200 can be a transmissive display panel, such as a liquid crystal display panel, but The invention is not limited to this.

The backlight module 100 of the embodiment includes a light source 110 and a light guide plate 120. The light source 110 is used to emit a light beam. In the present embodiment, the light source 110 is, for example, a light emitting diode. However, the present invention is not limited thereto, and the light source 110 may be a cold cathode tube or other suitable light emitting element. The light guide plate 120 has a light incident surface 122 and a light exit surface 124. In this embodiment, the light guide plate 120 further has a bottom surface 126 opposite to the light exit surface 124, and the light incident surface 122 connects the light surface 124 and the bottom surface 126. The light source 110 is disposed beside the light incident surface 122. In other words, the backlight module 100 of the embodiment may be a side-entry backlight module.

The light control element 300 of the embodiment can adjust the manner in which the light beam leaves the light guide plate 120, thereby forming a plurality of line light sources. The following is a detailed description with the illustration. The light control component 300 of the present embodiment includes a plurality of light control surface groups 310. Each of the light control surface sets 310 has a first surface 312 and a second surface 314 opposite thereto. The first surface 312 and the second surface 314 of the set of light control surfaces 310 are aligned along a first direction D1 that is substantially parallel to the light exit surface 124. In this embodiment, each of the light control surface groups 310 further includes a third surface 316 that connects the first surface 312 and the second surface 314. The third surface 316 can be parallel to the light exit surface 124.

At least one of the first surface 312 and the second surface 314 of each of the light control surface groups 310 is inclined at more than 90 degrees with respect to the light exit surface 124. In particular, if a surface (e.g., first surface 312 or second surface 314) is inclined at more than 90 degrees relative to light exit surface 124, the surface is obliquely facing light exit surface 124. If a surface is inclined with respect to the light-emitting surface 124 by less than 90 degrees, the surface is inclined to face away from the light-emitting surface The direction of 124 is, for example, obliquely facing the display panel 200.

In the present embodiment, the light control element 300 includes a plurality of strip-shaped protrusions T. Each strip of protrusions T has a first surface 312 and a second surface 314 of a set of light control surfaces 310. Each of the strips of protrusions T further has a third surface 316 of the surface of the light control surface 310. The surface of the strip-shaped projection T which is cut by a plane perpendicular to the light-emitting surface 124 (i.e., the paper surface of Fig. 1) may have a trapezoidal shape. The short base of the trapezoid is located between the long base of the trapezoid and the light exit surface 124. In other words, the strip-shaped projection T can be an inverted trapezoidal column. Further, in the present embodiment, the first surface 132 is inclined by a first angle θ1 with respect to the light exit surface 124. The second surface 134 is inclined by a second angle θ2 with respect to the light exit surface 124. At least one of the first angle θ1 and the second angle θ2 may fall within the range of 110 degrees to 120 degrees. The first angle θ1 and the second angle θ2 may be the same or different.

2 is a partial view of the light control element and the light valve of FIG. 1. Referring to FIG. 1 and FIG. 2, in the embodiment, the light control surface group 310 is designed to allow the light beam L to be transmitted from the self-control light surface group 310 to form a line light source. As shown in FIG. 2, when the light beam L is transmitted from the light valve 400 to the strip-shaped protrusion T, the first surface 312 and the second surface 314 of the light-control surface group 310 can totally reflect and refract the light beam L, thereby causing the light beam L. Concentrated to the normal direction N of the light exit surface 124. On the other hand, if the light beam L does not enter the strip-shaped projection T, the light ray L can be totally reflected by the light valve 400 to continue to be transmitted in the light guide plate 100 without passing through the light control element 300. Therefore, a plurality of line sources can be formed at the location of the light control surface group 310. The line light source and display panel 200 can transmit a plurality of different views of the display panel 200 to different fields of view, so that the stereoscopic display device 1000 can display a stereoscopic picture.

Referring to FIG. 1 again, in the embodiment, the plurality of strip-shaped protrusions T may be equally spaced along the first direction D1. The light control element 300 further includes a plurality of bottom surfaces 320. The plurality of bottom surfaces 320 are alternately arranged with the plurality of strip-shaped protrusions T. The strip-shaped protrusions T are disposed between a reference plane R where the bottom surface 320 is located and the light-emitting surface 124 of the light guide plate 100. Specifically, in the embodiment, the light control element 300 further includes a connection substrate 330. The connection substrate 330 has a plurality of bottom surfaces 320. The connection substrate 330 connects a plurality of strip-shaped protrusions T. The plurality of strip bumps T are disposed between the connection substrate 330 and the light exit surface 124. However, the arrangement of the strip-shaped projections T is not limited to the above. In other embodiments, the plurality of strip protrusions T may also be configured in other ways. 3 is a cross-sectional view of a stereoscopic display device according to another embodiment of the present invention. Referring to FIG. 3, in this embodiment, the light control element 300A includes a plurality of bottom surfaces 320. The bottom surface 320 and the strip-shaped projections T are alternately arranged. A reference plane R where the bottom surface 320 is located is disposed between the strip-shaped protrusions T and the light-emitting surface 124 of the light guide plate 100. Specifically, the light control element 300A further includes a connection substrate 330. The connection substrate 330 has a plurality of bottom surfaces 320. The connection substrate 330 is disposed between the plurality of strip-shaped protrusions T and the light-emitting surface 124.

Referring to FIG. 1 again, the light control component 300 of the present embodiment further includes a top surface 340 with respect to the plurality of bottom surfaces 320. At least one of the top surface 340 and the plurality of bottom surfaces 320 can be designed as a light scattering surface, such as a rough surface. The light scattering surface can be scattered to a plurality of directions when the light beam reaches the connection substrate 330, thereby increasing the viewing angle of the stereoscopic display device 1000 of the present embodiment. Furthermore, the refractive index of the connection substrate 330 may be different from the refractive index of the plurality of strip protrusions T. When the refractive index of the connecting substrate 330 is different from the refractive index of the strip-shaped protrusion T, the greater the difference The effect of deflecting the light beam by the connection substrate 330 is more remarkable, and the viewing angle of the stereoscopic display device 1000 of the present embodiment is expanded.

In the embodiment, in order to increase the light coupling efficiency of the light guide plate 120, the light incident surface 122 of the light guide plate 120 can be specially designed. The following description will be made with reference to FIGS. 1 and 4. 4 is a view of a portion of the light source and the light guide plate of FIG. 1. Referring to FIGS. 1 and 4 , the light guide plate 120 has a bottom surface 126 opposite to the light exit surface 124 . The light emitting surface 124 is located between the display panel 200 and the bottom surface 126. As shown in FIG. 4, the illumination source 110 has an optical axis X. The optical axis X is located on a reference plane K parallel to the light exit surface 124. The light incident surface 122 includes a first sub-light incident surface 122a and a second sub-light incident surface 122b on different sides of the reference plane K, respectively. The first sub-light incident surface 122a connects the light-emitting surface 124 and the second sub-light incident surface 122b. The second sub-light incident surface 122b connects the first sub-light incident surface 122a and the bottom surface 126. The first sub-light incident surface 122a and the second sub-light incident surface 122b are inclined with respect to the reference plane K and face the optical axis X. In other words, the first sub-light incident surface 122a and the second sub-light incident surface 122b are inclined with respect to the reference plane K by more than 90 degrees. In this embodiment, the first sub-light incident surface 122a is mirror-symmetrical with respect to the second sub-light incident surface 122b with respect to the reference plane K. The angle θ3 of the first sub-light incident surface 122a and the second sub-light incident surface 122b in the material of the light guide plate 120 may fall within a range of 270 to 300 degrees.

As shown in FIG. 4, the light guide plate 120 of the embodiment further has a first connection surface 127 connecting the first sub-light incident surface 122a and the light exit surface 124, and a second connection surface connecting the second sub-light incident surface 122b and the bottom surface 126. 128. The first connecting surface 127 and the second connecting surface 128 are respectively located on different sides of the reference plane K. The first connecting surface 127 and the second connecting surface 128 are opposite to the reference plane K is inclined and faces away from the optical axis X of the illumination source 110. In this embodiment, the first connecting surface 127 can be mirror-symmetrical with respect to the second connecting surface 128 with respect to the reference plane K. From another point of view, the first connecting surface 127, the first sub-light incident surface 122a, the second sub-light incident surface 122b, and the second connecting surface 128 are perpendicular to a plane of the light-emitting surface 124 (ie, the paper surface of FIG. 4). The cut lines A1, A2, A3, and A4 can be connected in a W shape. In this embodiment, the angle θ4 between the first connecting surface 127 and the first sub-light incident surface 122a in the material of the light guide plate 120 and the second connecting surface 128 and the second sub-light incident surface 122b are within the material of the light guide plate 120. The angle θ5 sandwiched may fall within the range of 40 degrees to 80 degrees.

In addition, in the embodiment, the maximum width W1 of the recess C formed by the first sub-light incident surface 122a and the second sub-light incident surface 122b in the normal direction N of the light-emitting surface 124 may be greater than the light-emitting source 110 on the light-emitting surface 124. The maximum width W2 of the line direction N. In this way, the illumination source 110 of the embodiment can be disposed in the recess C formed by the first sub-light incident surface 122a and the second sub-light incident surface 122b. The light beam L1 emitted by the light source 110 having a small deflection angle can be refracted by the first sub-light incident surface 122a to the light exit surface 124. The light beam L1 refracted to the light-emitting surface 124 can be totally reflected by the light-emitting surface 124 and transmitted through the light guide plate 120. The light beam L2 emitted by the light source 110 having a large deflection angle can be refracted by the second sub-light incident surface 122b to the bottom surface 126, and then transmitted through the light guide plate 120. The light beam L3 having a larger deflection angle emitted by the light source 110 can be refracted by the second sub-light incident surface 122b to the second connection surface 128. The light beam L3 refracted to the second connection surface 128 can be totally reflected by the second connection surface 128 to the bottom surface 126 and thus transmitted in the light guide plate 120.

Figure 5 is the light beam emitted by the illumination source of Figure 4 after the first connection The distribution of the surface, the first sub-light entrance surface, the second sub-light entrance surface, and the second connection surface. In particular, the angle in FIG. 5 refers to the angle between the light beam L and the optical axis X of the light source 110. As can be seen from FIG. 5, after the light beam L emitted by the light source passes through the first connection surface 127, the first sub-light incident surface 122a, the second sub-light incident surface 122b, and the second connection surface 128, the light beam L and the optical axis The angle of X is concentrated between 15 and 50 degrees and between -50 and -15 degrees, thereby increasing the probability that the light beam L is totally reflected by the bottom surface 126 and the light exit surface 124. In other words, the light coupling efficiency of the light guide plate 120 can be significantly improved through the first connection surface 127, the first sub-light incident surface 122a, the second sub-light incident surface 122b, and the second connection surface 128.

Figure 6 is a schematic illustration of a stereoscopic display device in accordance with a first embodiment of the present invention operating in a spatial multiplex mode. Referring to FIG. 6 , the stereoscopic display device 1000 of the present embodiment further includes a light valve 400 and a control unit 500 electrically connected to the display panel 200 and the light valve 400 . The light valve 400 is disposed between the light guide plate 120 and the display panel 200. In this embodiment, the light valve 400 can be disposed between the light guide plate 120 and the light control element 300. The light valve 400 has a plurality of working areas S corresponding to the plurality of light control surface groups 310, respectively. When any of the work areas S is turned on, part of the light beam L from the light source 110 is transmitted to the display panel 200 via the work area S. When any of the work areas S is turned off, part of the light beam L from the light source 110 is substantially incapable of being transferred to the display panel 200 via the work area S. The control unit 500 can be electrically connected to the display panel 200 and the light valve 400. The control unit 500 can control whether the light beam emitted from the light exit surface 124 can pass through the work area S.

The display panel 200 of the present embodiment has a plurality of pixel groups G1 and G2. Each pixel group G1 (or G2) has a plurality of pixel columns P1 (or P2). Work area S may be inclined or substantially parallel with respect to the pixel columns P1, P2. In the present embodiment, the control unit 500 can cause the light beam L to pass through the plurality of work areas S at the same time. The light beam L that has passed through the working area S converges on the plurality of viewing areas V1, V2 after passing through the plurality of pixel groups G1, G2. Furthermore, these pixel groups G1, G2 are M pixel groups, where M is a positive integer greater than or equal to 2. M-1 pixel columns P2 (or P1) belonging to other M-1 pixel groups respectively between adjacent two pixel columns P1 (or P2) in each pixel group G1 (or G2) . The control unit 500 causes the M pixel groups G1 and G2 to display screens of M different viewing angles, respectively. The light beam L that has passed through the working area S is concentrated in the M viewing areas V1 and V2 after passing through the plurality of pixel groups G1 and G2.

For example, in the present embodiment, these pixel groups G1 and G2 are two pixel groups. One pixel column P2 (or P1) belonging to the other one pixel group is provided between adjacent two pixel columns P1 (or P2) in each pixel group G1 (or G2). The control unit 500 causes the two pixel groups G1 and G2 to display two different viewing angle screens. The light beam L that has passed through the work area S converges on the two fields of view V1 and V2 after passing through the plurality of pixel groups G1 and G2. In this way, when the left eye and the right eye of the user are in the viewing zone V1 and the viewing zone V2, respectively, the left eye and the right eye can respectively see the images of different viewing angles, and the parallax between the different viewing angles is parallax. It allows the user's brain to feel a stereoscopic image. Such a stereoscopic display mode is referred to as a spatial multiplex mode.

However, the present invention is not limited to the fact that the stereoscopic display device 1000 of the present embodiment can control whether the line light sources formed by the plurality of light control surface groups 310 are illuminated by the light valve 400, thereby enabling the stereoscopic display device 1000 to operate for a long time. Work mode and composite multiplex mode. The following first describes the three-dimensional with multiple icons The display device 1000 operates in a time multiplex mode and a compound multiplex. After that, how the light valve 400 illuminates or does not illuminate the line light source formed by the plurality of light control surface groups 310 will be exemplified.

7A and 7B are schematic views of a stereoscopic display device according to a first embodiment of the present invention operating in a time multiplex mode. Referring to FIGS. 7A and 7B , the control unit 500 is electrically connected to the display panel 200 and the light valve 400 . The work area S is divided into a plurality of work area groups S1 and S2. The control unit 500 turns on different work area groups S1, S2 at different points in time. The control unit 500 causes the N work area groups S1 and S2 to be turned on in turn and causes the light beam L to pass through the work area groups S1 and S2 to match the images displayed on the display panel 200, thereby displaying a high-resolution stereoscopic image. The control unit 500 divides the work area S into N work area groups Q1, Q2, where N is a positive integer greater than or equal to 2. A work area group Q1 includes a plurality of work areas S1. Another work area group Q2 includes a plurality of work areas S2. The light beam L that has passed through each of the work area groups Q1 (or Q2) converges on the plurality of fields of view V1, V2 after passing through the pixel groups G1, G2, respectively. N-1 work areas S2 (or S1) of other N-1 work area groups are provided between adjacent two work areas S1 (or S2) in each work area group Q1 (or Q2). The control unit 500 causes the light beam L to alternately pass through the N work area groups Q1, Q2.

In the present embodiment, at the same time, the control unit 500 causes the M pixel groups G1, G2 to display 1/N pictures of M different viewing angles, respectively. For example, when the stereoscopic display device 1000 is in the state of FIG. 7A, the pixel column P1 displays an image of half of the field of view V1, and the pixel column P2 displays an image of half of the field of view V2. When the stereoscopic display device 1000 is in FIG. 7B In the state, the pixel column P1 displays the image of the other half of the field of view V2, and the pixel column P2 displays the image of the other half of the field of view V1. When the stereoscopic display device 1000 is alternately in the display state of FIGS. 7A and 7B, the stereoscopic display device 1000 can provide a full-resolution image, that is, the image displayed by the pixel column P1 in FIG. 7A plus the image in FIG. 7B. The image displayed by the prime P2 constitutes a full-resolution image that is transmitted to the field of view V1. The image displayed by the pixel sequence P2 at the time of FIG. 7A is added to the image of the full-resolution image of the viewing zone V2, which is displayed by the image displayed by the pixel P1 in FIG. 7B. In other words, the stereoscopic display device 1000 can adopt a time-multiplexed display mode to achieve full-resolution stereoscopic image display.

8A and 8B are schematic views of a stereoscopic display device according to a first embodiment of the present invention operating in a composite multiplex mode. Referring to FIGS. 8A and 8B, the control unit 500 divides the work area S into two work area groups Q1 and Q2. The display panel 200 has a plurality of pixel groups G1, G2, G3, and G4. The light beam L that has passed through each of the work area groups Q1 (or Q2) converges on the plurality of fields of view V1, V2, V3, and V4 after passing through the pixel groups G1, G2, G3, and G4, respectively. A work area S2 (or S1) of another work area group is provided between adjacent two work areas S1 (or S2) in each work area group Q1 (or Q2). The control unit 500 causes the light beam L to alternately pass through the two work area groups Q1, Q2.

In the present embodiment, at the same time, the control unit 500 causes the four pixel groups G1, G2, G3, and G4 to display 1/2 screens of four different viewing angles, respectively. For example, when the stereoscopic display device 1000 is in the state of FIG. 8A, the pixel column P1 displays an image of half of the field of view V1, the pixel column P2 displays an image of half of the field of view V2, and the pixel column P3 displays half of the image. area The image of V3, while the pixel P4 shows half of the image of the field of view V4. When the stereoscopic display device 1000 is in the state of FIG. 8B, the pixel column P1 displays the image of the other half of the field of view V3, the pixel column P2 displays the image of the other half of the field of view V4, and the pixel column P3 displays the other half of the field of view. The image of V1, while the pixel P4 shows the image of the other half of the field of view V2. When the stereoscopic display device 1000 is alternately in the display state of FIGS. 8A and 8B, the stereoscopic display device 1000 can provide a high-resolution image in four viewing fields, that is, the image displayed by the pixel column P1 in FIG. 8A. In addition, the image displayed by the pixel P3 in FIG. 8B is composed of a high-resolution image transmitted to the viewing area V1. The image displayed by the pixel sequence P2 in FIG. 8A is added to the high-resolution image of the view V2 as shown in the image sequence P4 shown in FIG. 8B. The image displayed by the pixel sequence P3 in FIG. 8A is combined with the image displayed by the pixel sequence P1 in FIG. 8B to be transmitted to the high-resolution image of the viewing zone V3. The image displayed by the pixel sequence P4 in FIG. 8A is added to the high-resolution image of the view V4 by the image composition displayed by the pixel sequence P2 in FIG. 8B. Through the mode of composite multiplexing, the stereoscopic display device 1000 can provide stereo images of multiple people with high resolution.

9A and 9B, how the light valve 400 of the present embodiment illuminates or does not illuminate the line light source formed by the plurality of light control surface groups 310, respectively. 9A and 9B are views showing a part of a light control element, a light valve, and a light guide plate of the stereoscopic display device according to the first embodiment of the present invention. Referring to FIG. 9A, in the embodiment, the light valve 400 can be a light coupling element. The light coupling element has a plurality of light coupling switching regions. The plurality of coupling light switching regions of the light coupling element are the working area S of the light valve 400. Each work area S is extended by the light guide plate 200 to the light control element 300. In detail, in the embodiment, the opposite surfaces of the light valve 400 are respectively in contact with the light-emitting surface 300 of the light control element 300 and the light guide plate 120. In detail, in the present embodiment, each of the work areas S may extend from the light exit surface 124 to the strip protrusions T.

In the present embodiment, the control unit 500 (shown in FIG. 1) controls whether the light beam L emitted from the light exit surface 124 can pass through the work area S by controlling the refractive index distribution of each work area S. In this embodiment, the control unit 500 is configured to completely fill each working area S with the first substance M1 so that the light beam L emerging from the light exit surface 124 can pass through the work area S. The refractive index of the first substance M1 may be substantially equal to the refractive index of the light guide plate 120. As shown in FIG. 9A, when the work area S is completely filled with the first substance M1, the light beam L in the light guide plate 120 can be transmitted in the first substance M1, and then passes through the work area S to reach the light control surface group 310. At this time, the line light source formed by the light control surface group 310 can be illuminated.

As shown in FIG. 9A and FIG. 9B, the light valve 400 of the present embodiment includes a first substrate 410, a second substrate 420 disposed between the first substrate 410 and the light guide plate 120, and is filled in the first substrate 410 and the second substrate 420. A first substance M1 and a second substance M2, a plurality of first film layers 430, a plurality of second film layers 440, a plurality of first electrodes 450, and at least a second electrode 460 (shown in FIG. 10). The first film layer 430 is located between the second substrate 420 and the first substance M1 and the second substance M2. The orthographic projection of each of the first film layers 430 on the light exit surface 124 coincides with the orthographic projection of each of the work areas S on the light exit surface 124. The second film layer 440 is located between the second substrate 420 and the first substance M1 and the second substance M2. Each second film layer 440 is located adjacent to each other Between the districts S. Each of the first electrodes 450 is disposed between the second substrate 420 and the second film layer 440 located on two sides of a working area S. Figure 10 is a top plan view of the first electrode and the second electrode of the light valve of Figures 9A and 9B. Referring to FIGS. 9A , 9B and 10 , at least one second electrode 460 is disposed between the first substrate 410 and the second substrate 420 .

Referring again to FIG. 9A, the control unit 500 causes the working area S to completely fill the first substance M1 by making the potential difference between the first electrode 450 and the second electrode 460 on both sides of each working area S substantially zero. In detail, since the adhesion between the first substance M and the first film layer 430 is greater than the adhesion between the first substance M1 and the second film layer 440, the potential difference between the first electrode 450 and the second electrode 460 is substantially When it is zero, the first substance M will naturally concentrate on the first film layer 430 without remaining on the second film layer 440. In this way, the first substance M1 can fill the entire working area S, so that the light beam L can pass through the working area S by the first substance M1, thereby forming a plurality of line light sources. In this embodiment, the first film layer 430 may be a hydrophilic film, the second film layer 440 may be a hydrophobic film, the first substance M1 may be ionized water, and the second substance M2 may be air, but the present invention does not limit.

Referring to FIG. 9B, the control unit 500 (shown in FIG. 1) can be used to fill each working area S with the first substance M1 near one end of the light guide plate 120 and to be in contact with the first substance M1 at the other end away from the light guide plate 120. The second substance M2. The refractive index of the first substance M1 is greater than the refractive index of the second substance M2. In more detail, the control unit 500 can fill the working area S with the first substance M1 near one end of the light guide plate 120 by applying a potential difference between the first electrode 450 and the second electrode 460 located on two sides of each working area S. , And filling the second substance M2 at the other end away from the light guide plate 120. For example, the first electrode 450 may have a positive voltage, and the first substance M1 may be a negatively charged ion water, and the negatively charged first substance M1 may be attracted by the positive electrode first electrode 450 to stay close to the light guide plate. One end of 120, and the second substance M2 is displaced by the first substance M1 and stays away from the other end of the light guide plate 120. At this time, the light beam L emitted from the light-emitting surface 124 is totally reflected at the boundary between the first substance M1 and the second substance M2, and cannot pass through the work area S. As a result, the light control surface group 310 corresponding to the work area S cannot reflect and refract the light beam L to form a line light source.

The specific structure of the light valve is not limited to that shown in FIGS. 9A and 9B. Light valves can be seen in a variety of implementations. Figure 11 is a schematic view of a light valve according to another embodiment of the present invention. The light valve 400A can also illuminate or illuminate the line source formed by the plurality of light control surface groups 310. The specific structure and working principle of the light valve 400A will be described below with reference to FIG. Referring to FIG. 11 , the light valve 400A includes a first substrate 410 , a second substrate 420 disposed between the first substrate 410 and the light guide plate 120 , and a second substrate 420 disposed between the second substrate 420 and the first substance O and the second substance W. The second film layer 440, the plurality of first electrodes 450, and at least one second electrode 460 disposed between the first substrate 410 and the second substrate 420 (refer to FIG. 10). The first substance O and the second substance W are filled between the first substrate 410 and the second substrate 420. The first electrode 450 is disposed between the second film layer 440 and the second substrate 420. A first electrode 450 is disposed on opposite sides of each of the working areas SC and SO. In this embodiment, the second film layer 440 may be a hydrophobic film, the first substance O may be oil, and the second substance W is ionized water.

In FIG. 11, the control unit 500 (shown in FIG. 1) is placed in each of The potential difference between the first electrode 450 and the second electrode 460 on one of the two sides of the working area SC is substantially zero, so that the working area SC is filled with the first substance O near one end of the light guide plate 120 and at the other end away from the light guide plate 120. Filled with the second substance W. In detail, since the adhesion between the second substance W and the second film layer 440 is less than the adhesion between the first substance O and the second film layer 440, between the first electrode 450 and the second electrode 460 When the potential difference is substantially zero (ie, when no electrostatic force is generated by the applied voltage), the first substance O naturally stays close to the second film layer 440, and the second substance W is discharged by the first substance O. Far from the second film layer 440. At this time, when the light beam L passes through the work area SC, it is totally reflected by the boundary between the first substance O and the second substance W, and cannot pass through the work area SC. As a result, the light control surface group 310 corresponding to the work area SC cannot reflect or refract the light beam L to form a line light source.

On the other hand, in FIG. 10, the control unit 500 (shown in FIG. 1) can completely fill the working area SO by applying a potential difference between the first electrode 450 and the second electrode 460 located on one of the two sides of the working area SO. The first substance O. For example, the first electrode 450 can be applied with a positive voltage, and the second substance W can be a negatively charged ion water, and the negatively charged second substance W can be attracted by the positive electrode of the positive electrode 450 to stay at the first Above the electrode 450, the first substance O is displaced by the second substance W to fill the entire working area SO. In this way, the light beam L can pass through the working area SO through the first substance O, and then form a line light source through the light control surface group 310 corresponding to the working area SO.

Referring to FIG. 1 again, the stereoscopic display device 1000 of the embodiment can be further The step includes switching element 600. Switching element 600 is used to switch between a light penetration mode and a light scattering mode. When the switching element 600 is switched to the light penetration mode, the stereoscopic display device 1000 can display a three-dimensional image. When the switching element 600 is switched to the light scattering mode, the stereoscopic display device 1000 can display a two-dimensional image. In this embodiment, the light control element 300 can be located between the switching element 600 and the light guide plate 120. However, the present invention is not limited thereto, and the switching element 600 may be disposed at other appropriate positions.

FIG. 12 is a cross-sectional view of a stereoscopic display device according to another embodiment of the present invention. Referring to FIG. 12, in this embodiment, the switching element 600 can be integrated in the connection substrate 330 of FIG. FIG. 13 is a cross-sectional view of a stereoscopic display device according to still another embodiment of the present invention. Referring to FIG. 13 , in this embodiment, the switching element 600 is also located between the light control element 300 and the light guide plate 120 . FIG. 14 is a cross-sectional view showing a stereoscopic display device according to still another embodiment of the present invention. Referring to FIG. 14 , in this embodiment, the switching element 600 can be embedded in the light guide plate 120 and in contact with the light exit surface 124 of the light guide plate 120 . Figure 15 is a cross-sectional view showing a stereoscopic display device in accordance with an embodiment of the present invention. Referring to FIG. 15 , in this embodiment, the light guide plate 120 may be located between the light control element 300 and the switching element 600 . Figure 16 is a cross-sectional view showing a stereoscopic display device according to still another embodiment of the present invention. Referring to FIG. 16 , in this embodiment, the switching element 600 can be embedded in the light guide plate 120 and in contact with the bottom surface 126 of the light guide plate 120 .

Referring again to FIG. 1, the switching element 600 of the present embodiment may be an electrically variable light scattering structure. For example, the switching element 600 can be a polymer dispersed liquid crystal (PDLC) panel. When the switching element 600 is enabled, the switching element 600 can be in a light penetration mode. The stereoscopic display device 1000 can display a three-dimensional image. When the switching element 600 is disabled, the switching element 600 can be in a light scattering mode, at which time the stereoscopic display device 1000 can display a two-dimensional image.

However, the representation of the switching element 600 of the present invention is not limited to that described in the previous paragraph. 17A and 17B are schematic cross-sectional views showing a stereoscopic display device according to another embodiment of the present invention. Referring to FIGS. 17A and 17B, in this embodiment, the switching element 600 can be a light scattering structure (eg, a diffusion sheet). The light scattering structure is located between the display panel 200 and the light control element 300. As shown in FIG. 17A, when the switching element 600 is switched from the light scattering mode to the light transmission mode, the switching element 600 moves toward the light control element 300 and approaches the light control element 300. In this way, the light beam emitted by the light control element 300 is not excessively diffused, so that the stereoscopic display device 1000 can still display the three-dimensional image. As shown in FIG. 17B, when the switching element 600 is switched from the light transmission mode to the light scattering mode, the switching element 600 moves toward the display panel 200 away from the light control element 300. As a result, the light beam emitted by the light control element 300 is diffused by the switching element 600, thereby enabling the stereoscopic display device 1000 to display a two-dimensional image.

18A and 18B are schematic cross-sectional views showing a stereoscopic display device according to still another embodiment of the present invention. Referring to FIGS. 18A and 18B, in this embodiment, the switching element 600 can be a light scattering structure. As shown in FIG. 18A, when the switching element 600 is switched from the light scattering mode to the light transmission mode, the switching element 600 is separated from between the display panel 200 and the light control element 300. In detail, the switching element 600 of the embodiment includes a rotating shaft 610 and a diffusion sheet 620 mounted on the rotating shaft 610. When the switching element 600 is switched from the light scattering mode to the light penetrating mode In the formula, the rotating shaft 610 can roll up the diffusion sheet 620 to separate the diffusion sheet 620 from between the display panel 200 and the light control element 300. At this time, the diffusion sheet 620 cannot scatter the light beam emitted from the light control element 300, thereby enabling the stereoscopic display device 1000 to display a three-dimensional image. As shown in FIG. 18B, when the switching element 600 is switched from the light transmission mode to the light scattering mode, the switching element 600 can be moved between the display panel 200 and the light control element 300. In detail, when the switching element 600 is switched from the light transmission mode to the light scattering mode, the rotating shaft 610 can drive the diffusion sheet 620 to move the diffusion sheet 620 between the display panel 200 and the light control element 300. At this time, the diffusion sheet 620 can scatter the light beam emitted from the light control element 300, thereby enabling the stereoscopic display device 1000 to display a two-dimensional image.

Second embodiment

Figure 19 is a cross-sectional view showing a stereoscopic display device according to a second embodiment of the present invention. Referring to FIG. 19, the stereoscopic display device 1000A of the present embodiment is similar to the stereoscopic display device 1000 of the first embodiment. Therefore, the same elements are denoted by the same reference numerals. The stereoscopic display device 1000A of the present embodiment is different from the stereoscopic display device 1000 of the first embodiment in that, in the present embodiment, the light control element 300B is different from the light control element 300 of the first embodiment. The following is a description of the difference, and the similarities between the two will not be repeated.

The light control element 300B of the present embodiment is disposed between the display panel 200 and the light guide plate 120. Light control element 300B includes a plurality of light management surface groups 310. Each of the light control surface sets 310 has a first surface 312 and a second surface 314 opposite thereto. The first surface 312 and the second surface 314 of the light control surface set 310 are aligned along a first direction D1 that is substantially parallel to the light exit surface 124. the first At least one of the surface 312 and the second surface 314 is inclined with respect to the light exit surface 124 by more than 90 degrees. The light control element 300B of the embodiment further includes a plurality of strip-shaped grooves U. Each strip of grooves U has a first surface 312 and a second surface 314 of a set of light control surfaces 310.

Figure 20 is a partial view of the light control element and light valve of Figure 19. Referring to FIG. 20, in the embodiment, the first surface 312 and the second surface 314 of the light control surface group 310 may also reflect or refract the light beam L out of the light control element 300B to form a line light source. In this embodiment, the first surface 312 and the second surface 314 of each of the light control surface groups 310 can be directly connected. The acute angle θ6 between the first surface 312 and the second surface 314 of each of the light control surface groups 310 may fall within a range of 40 degrees to 60 degrees, but the invention is not limited thereto.

In this embodiment, the first surface 312 and the second surface 314 can both be inclined at more than 90 degrees with respect to the light exit surface 124. However, the invention is not limited thereto. Figure 21 is a cross-sectional view showing a stereoscopic display device according to another embodiment of the present invention. Referring to FIG. 21, in the stereoscopic display device 1000B, the first surface 312 of each of the light control surface groups 310 may be inclined with respect to the light exit surface 124. The second surface 314 of the set of light control surfaces 310 is substantially perpendicular to the light exit surface 124. The first surface 312 of each of the light control surface groups 310 is located between the light incident surface 122 and the second surface 314. The acute angle θ7 between the first surface 312 and the second surface 314 of the light control surface group 310 falls within a range of 20 to 30 degrees.

Regarding other members of the stereoscopic display devices 1000A and 1000B, the corresponding description can be found in the first embodiment with reference to the numerals in FIGS. 19 and 21. In addition, the stereoscopic display devices 1000A and 1000B can also be applied to various working modes described in the respective embodiments, and thus will not be repeated herein.

In summary, the stereoscopic display device of the embodiment of the present invention can couple the light beam in the light guide plate into the light control surface group of the light control element through the light control element to form a plurality of line light sources, thereby enabling the stereoscopic display device to Display 3D images.

The stereoscopic display device according to another embodiment of the present invention can operate the stereoscopic display device in the time multiplex mode through the light valve, and enable the stereoscopic display device to display the high resolution three-dimensional image.

The stereoscopic display device according to another embodiment of the present invention can cause the stereoscopic display device to display a two-dimensional image or a three-dimensional image through the switching element, thereby making the function of the stereoscopic display device more diverse.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1000, 1000A, 1000B‧‧‧ stereo display device

100‧‧‧Backlight module

110‧‧‧Light source

120‧‧‧Light guide

122‧‧‧Into the glossy surface

122a‧‧‧The first child into the glossy

122b‧‧‧Second sub-glossy

124‧‧‧Glossy surface

126‧‧‧ bottom

127‧‧‧ first connection surface

128‧‧‧second connection surface

200‧‧‧ display panel

300, 300A, 300B‧‧‧ light control components

310‧‧‧Light control surface group

312‧‧‧ first surface

314‧‧‧ second surface

316‧‧‧ third surface

320‧‧‧ bottom

330‧‧‧Connecting substrate

340‧‧‧ top surface

400, 400A‧‧‧ light valve

410‧‧‧First substrate

420‧‧‧second substrate

430‧‧‧ first film

440‧‧‧Second film

450‧‧‧first electrode

460‧‧‧second electrode

500‧‧‧Control unit

600‧‧‧Switching components

610‧‧‧ shaft

620‧‧‧scattering sheet

A1~A4‧‧‧ cut line

C‧‧‧ dent

D1‧‧‧ first direction

G1, G2‧‧‧ pixel group

L, L1~L3‧‧‧ beams

M1, O‧‧‧ first substance

M2, W‧‧‧ second substance

N‧‧‧ normal direction

P1, P2‧‧‧

Q1, Q2‧‧‧Workspace Group

R, K‧‧‧ reference plane

S, SC, SO‧‧‧ Workspace

T‧‧‧ strip bulges

U‧‧‧ strip groove

V1~V4‧‧‧Sight

W1, W2‧‧‧ width

X‧‧‧ optical axis

Θ1~θ7‧‧‧ angle

1 is a cross-sectional view showing a stereoscopic display device according to a first embodiment of the present invention.

2 is a partial view of the light control element and the light valve of FIG. 1.

3 is a cross-sectional view of a stereoscopic display device according to another embodiment of the present invention.

4 is a view of a portion of the light source and the light guide plate of FIG. 1.

FIG. 5 is a view showing the distribution of the light beam emitted by the light source of FIG. 4 after passing through the first connecting surface, the first sub-light incident surface, the second sub-light incident surface, and the second connecting surface.

Figure 6 is a schematic illustration of a stereoscopic display device in accordance with a first embodiment of the present invention operating in a spatial multiplex mode.

7A and 7B are schematic views of a stereoscopic display device according to a first embodiment of the present invention operating in a time multiplex mode.

8A and 8B are schematic views of a stereoscopic display device according to a first embodiment of the present invention operating in a composite multiplex mode.

9A and 9B are views showing a part of a light control element, a light valve, and a light guide plate of the stereoscopic display device according to the first embodiment of the present invention.

Figure 10 is a top plan view of the first electrode and the second electrode of the light valve of Figures 9A and 9B.

Figure 11 is a schematic view of a light valve according to another embodiment of the present invention.

FIG. 12 is a cross-sectional view of a stereoscopic display device according to another embodiment of the present invention.

FIG. 13 is a cross-sectional view of a stereoscopic display device according to still another embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a stereoscopic display device according to still another embodiment of the present invention.

Figure 15 is a cross-sectional view showing a stereoscopic display device in accordance with an embodiment of the present invention.

Figure 16 is a cross-sectional view showing a stereoscopic display device according to still another embodiment of the present invention.

17A and 17B are schematic cross-sectional views showing a stereoscopic display device according to another embodiment of the present invention.

18A and 18B are perspective display devices according to still another embodiment of the present invention; Schematic diagram of the section.

Figure 19 is a cross-sectional view showing a stereoscopic display device according to a second embodiment of the present invention.

Figure 20 is a partial view of the light control element and light valve of Figure 19.

Figure 21 is a cross-sectional view showing a stereoscopic display device according to another embodiment of the present invention.

1000‧‧‧ Stereo display device

100‧‧‧Backlight module

110‧‧‧Light source

120‧‧‧Light guide

122‧‧‧Into the glossy surface

122a‧‧‧The first child into the glossy

122b‧‧‧Second sub-glossy

124‧‧‧Glossy surface

126‧‧‧ bottom

200‧‧‧ display panel

300‧‧‧Light control components

310‧‧‧Light control surface group

312‧‧‧ first surface

314‧‧‧ second surface

316‧‧‧ third surface

320‧‧‧ bottom

330‧‧‧Connecting substrate

340‧‧‧ top surface

400‧‧‧Light valve

600‧‧‧Switching components

D1‧‧‧ first direction

N‧‧‧ normal direction

R‧‧‧ reference plane

T‧‧‧ strip bulges

Θ1‧‧‧ first angle

Θ2‧‧‧second angle

Claims (58)

A stereoscopic display device includes: a backlight module, comprising: a light source for emitting a light beam; and a light guide plate having a light incident surface and a light exiting surface, the light beam entering the light guide plate from the light incident surface And the light-emitting surface exits the light guide plate; a display panel; a light control element disposed between the display panel and the light guide plate, the light control element comprises: a plurality of light control surface groups, each of the light control surfaces The first surface and the second surface are opposite to each other, and the first surface and the second surface of the light control surface group are arranged along a first direction substantially parallel to the light emitting surface, the first At least one of the surface and the second surface is inclined with respect to the light exiting surface by more than 90 degrees; and a switching element for switching between a light transmission mode and a light scattering mode, when the switching element When switching to the light penetration mode, the stereoscopic display device displays a three-dimensional image, and when the switching element switches to the light scattering mode, the stereoscopic display device displays a two-dimensional image. The stereoscopic display device of claim 1, wherein the light control element further comprises: a plurality of strip protrusions, each of the strip protrusions having the first surface of the group of light control surfaces and the The second surface. The stereoscopic display device of claim 2, wherein The light control element further includes: a plurality of bottom surfaces alternately arranged with the strip-shaped protrusions, wherein the strip-shaped protrusions are disposed between a reference plane where the bottom surfaces are located and the light-emitting surface of the light guide plate. The stereoscopic display device of claim 2, wherein the light control element further comprises: a plurality of bottom surfaces arranged alternately with the strip-shaped protrusions, wherein a reference plane on which the bottom surfaces are located is disposed on the strips The protrusion is between the light emitting surface of the light guide plate. The stereoscopic display device of claim 2, wherein each of the light control surface groups further comprises a third surface connecting the first surface and the second surface, the third surface substantially being opposite to the light guide plate The light-emitting surfaces are parallel, and each of the strip-shaped protrusions has the first surface, the second surface and the third surface of the light-control surface group. The stereoscopic display device of claim 2, wherein the first surface is inclined by a first angle with respect to the light-emitting surface of the light guide plate, and the second surface is inclined with respect to the light-emitting surface of the light guide plate. At two angles, at least one of the first angle and the second angle falls within a range of 110 degrees to 120 degrees. The stereoscopic display device of claim 1, wherein the light control element further comprises a plurality of strip-shaped grooves, each of the strip-shaped grooves having the first surface of the light-control surface group and the first Two surfaces. The stereoscopic display device of claim 7, wherein the first surface of each of the light control surface groups is directly connected to the second surface. The stereoscopic display device of claim 7, wherein the acute surface of the first surface and the second surface of each of the light control surface groups is in a range of 40 to 60 degrees. The stereoscopic display device of claim 7, wherein the illumination source is disposed adjacent to the light incident surface, and the first surface of each of the light control surface groups is inclined with respect to the light exit surface of the light guide plate. The second surface of the light control surface group is substantially perpendicular to the light exit surface, and the first surface of each of the light control surface groups is located between the light incident surface of the light guide plate and the second surface. The stereoscopic display device of claim 10, wherein the acute surface of the first surface and the second surface of the light control surface group is in a range of 20 to 30 degrees. The stereoscopic display device of claim 1, wherein the light control element further comprises a plurality of bottom surfaces and a top surface, the bottom surfaces being alternately arranged with the light control surface groups, the top surface being opposite to the bottom surfaces, Wherein at least one of the top surface and the bottom surfaces is a light scattering surface. The stereoscopic display device of claim 1, wherein the light control element is located between the switching element and the light guide plate. The stereoscopic display device of claim 1, wherein the switching element is located between the light control element and the light guide plate. The stereoscopic display device of claim 1, wherein the light guide plate is located between the light control element and the switching element. The stereoscopic display device of claim 1, wherein the switching element is an electrically variable light scattering structure. The stereoscopic display device of claim 1, wherein the switching element is a light scattering structure, the light scattering structure is located between the display panel and the light control element, and the switching element is switched by the light scattering mode. In the light penetration mode, the switching element moves toward the light control element, and when the switching element is switched from the light transmission mode to the light scattering mode, the switching element moves toward the display panel. The stereoscopic display device of claim 1, wherein the switching element is a light scattering structure, and when the switching element is switched to the light transmission mode by the light scattering mode, the switching element leaves the display panel and Between the light control elements, when the switching element is switched to the light scattering mode by the light transmission mode, the switching element moves between the display panel and the light control element. The stereoscopic display device of claim 1, wherein the light guide plate further has a bottom surface opposite to the light-emitting surface, the light-emitting surface is located between the display panel and the bottom surface, and the light-incident surface is connected to the light-emitting surface And the bottom surface, the light source has an optical axis, the optical axis is located on a reference plane parallel to the light exit surface, and the light incident surface includes a first sub-light incident surface and one of the two sides of the reference plane a second sub-light incident surface, the first sub-light incident surface is connected to the light-emitting surface and the second sub-light incident surface, and the second sub-light incident surface is connected to the first sub-light incident surface and the bottom surface, the first sub-input The smooth surface and the second sub-incident surface are inclined relative to the reference plane and face the optical axis. The stereoscopic display device of claim 19, wherein the first sub-light incident surface and the second sub-light incident surface are in a range of 270 to 300 degrees in a corner of the material of the light guide plate. The stereoscopic display device of claim 19, wherein the illumination source is disposed in a recess formed by the first sub-light incident surface and the second sub-light incident surface. The stereoscopic display device of claim 19, wherein the light guide plate further has a first connection surface connecting the first sub-light incident surface and the light-emitting surface, and connecting the second sub-light incident surface and the bottom surface a second connecting surface, the first connecting surface and the second connecting surface are respectively located on two sides of the reference plane, and the first connecting surface and the second connecting surface are inclined with respect to the reference plane and facing away from the light source Optical axis. The stereoscopic display device of claim 22, wherein an angle between the first connecting surface and the first sub-light incident surface in a material of the light guide plate, and the second connecting surface and the second sub-surface The angle of the light incident surface in the material of the light guide plate falls within a range of 40 to 80 degrees. The stereoscopic display device of claim 1, further comprising: a light valve disposed between the light guide plate and the display panel, the light valve having a plurality of work corresponding to the light control surface groups respectively a region, wherein when any of the working regions is turned on, a portion of the light beam from the light source is transmitted to the display panel via the work region, and when any of the work regions is turned off, a portion of the light beam from the light source is substantially Unable to pass to the display panel via the working area; and a control unit electrically connected to the display panel and the light valve, the work is divided into a plurality of work area groups, and the control unit opens different at different time points These work area groups. The stereoscopic display device of claim 24, wherein the operations are divided into N work area groups, and N is a positive integer greater than or equal to 2, and the control unit turns the N work area groups on and off. The timing of the light beam passing through the set of work areas and the image displayed by the display panel are matched with each other. The stereoscopic display device of claim 24, wherein the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the light beam passing through each of the working region groups passes through The pixel groups are respectively concentrated in a plurality of viewing areas, and N-1 working areas of other N-1 working area groups are disposed between adjacent two working areas in each working area group. The stereoscopic display device of claim 26, wherein the pixel groups are M pixel groups, M is a positive integer greater than or equal to 2, and adjacent two pixels in each pixel group M-1 pixel columns belonging to other M-1 pixel groups are provided between the columns. The stereoscopic display device of claim 27, wherein the control unit causes the M pixel groups to display 1/N pictures of M different viewing angles at the same time. The stereoscopic display device of claim 24, wherein the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the working regions are inclined with respect to the pixel columns or Essentially parallel. The stereoscopic display device of claim 1, further comprising: a light valve disposed between the light guide plate and the display panel, the light valve having a plurality of work corresponding to the light control surface groups respectively District; a control unit electrically connected to the display panel and the light valve, the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the control unit causes the light beam to pass through the work at the same time The zones, and the light beams emerging from the work zones respectively converge in a plurality of viewing zones after passing through the set of pixels. The stereoscopic display device of claim 30, wherein the pixel groups are M pixel groups, M is a positive integer greater than or equal to 2, and adjacent two pixels in each pixel group. M-1 pixel columns belonging to other M-1 pixel groups are provided between the columns. The stereoscopic display device according to claim 31, wherein the control unit causes the M pixel groups to display M different viewing angle images. The three-dimensional display device of claim 30, wherein the working areas are inclined or substantially parallel with respect to the pixel columns. The stereoscopic display device of claim 24, wherein the light valve is a light-coupled component, the light-coupled component has a plurality of light-switching switching regions, and the light-switching regions of the light-coupled component are the light In the working areas of the valve, the light coupling element is disposed between the light guide plate and the light control element, and each of the light coupling switching regions extends from the light guide plate to the light control element, and the control unit controls each of the light control elements The refractive index distribution of the light-switching region is coupled to control whether the light beam emitted from the light-emitting surface passes through the light-switching switching region. The stereoscopic display device of claim 34, wherein the control unit is configured to cause each of the coupling light switching regions to completely fill a first substance and pass the light beam emitted from the light emitting surface through the coupling light Switching area, the The control unit is configured to fill each of the light-coupling switching regions with the first substance near one end of the light guide plate and fill the second substance contacting the first substance at a distance from the other end of the light guide plate to make the light-emitting material The light beam emerging from the surface is totally reflected at the interface between the first substance and the second substance, wherein the refractive index of the first substance is greater than the refractive index of the second substance. The stereoscopic display device of claim 35, wherein the refractive index of the first substance is substantially equal to the refractive index of the light guide plate. The stereoscopic display device of claim 35, wherein the light-coupling element comprises: a first substrate; a second substrate disposed between the first substrate and the light guide plate, the first substance and the a second substance is filled between the first substrate and the second substrate; a plurality of first film layers are located between the second substrate and the first substance and the second substance, and each of the first film layers An orthographic projection on the light-emitting surface coincides with an orthographic projection of each of the coupling light switching regions on the light-emitting surface; a plurality of second film layers between the second substrate and the first substance and the second substance Each of the second film layers is located between the two adjacent light-switching regions, and the adhesion between the first material and the first film layer is greater than the adhesion between the first material and the second film layer; a plurality of first electrodes, each of the first electrodes being disposed between the second substrate and the second film layer on opposite sides of the light-switching switching region; and at least one second electrode disposed on the first electrode Between the substrate and the second substrate, the control unit transmits through each of the coupled lights The second side of the transducer region The potential difference between an electrode and the second electrode is substantially zero, so that the coupling coupling region completely fills the first substance, and the control unit transmits the potential difference to the two sides located on each of the coupling switching regions Between an electrode and the second electrode, the light-switching switching region is filled with the first substance near one end of the light guide plate and filled with the second substance at the other end away from the light guide plate. The stereoscopic display device of claim 37, wherein the first film layers are hydrophilic films, the second film layers are hydrophobic films, the first material is ionized water, and the second material is air. The stereoscopic display device of claim 35, wherein the light-coupling element comprises: a first substrate; a second substrate disposed between the first substrate and the light guide plate, the first substance and the a second substance is filled between the first substrate and the second substrate; a second film layer is disposed between the second substrate and the first substance and the second substance, the second substance and the second The adhesion between the film layers is less than the adhesion between the first material and the second film layer; the plurality of first electrodes are disposed between the second film layer and the second substrate, and each of the couplings One of the first electrodes is disposed on opposite sides of the optical switching region; and at least one second electrode is disposed between the first substrate and the second substrate, and the control unit transmits a potential difference to each of the couplings Between the first electrode and the second electrode on the two sides of the light switching region, the coupling light switching region is completely filled with the first substance, and the control unit transmits the coupling light The potential difference between the first electrode and the second electrode on the two sides of the switching region is substantially zero, so that the coupling coupling region is filled with the first substance near one end of the light guide plate and away from the other end of the light guide plate Filled with the second substance. The stereoscopic display device of claim 39, wherein the second film layer is a hydrophobic film, the first substance is oil, and the second substance is ionized water. A stereoscopic display device includes: a backlight module, comprising: a light source for emitting a light beam; and a light guide plate having a light incident surface and a light exiting surface, the light beam entering the light guide plate from the light incident surface And the light-emitting surface exits the light guide plate; a display panel; a light control element disposed between the display panel and the light guide plate, the light control element comprises: a plurality of light control surface groups, each of the light control surfaces The first surface and the second surface are opposite to each other, and the first surface and the second surface of the light control surface group are arranged along a first direction substantially parallel to the light emitting surface, the first At least one of the surface and the second surface is inclined with respect to the light emitting surface by more than 90 degrees; a light valve is disposed between the light guide plate and the display panel, the light valve having the light control respectively a plurality of working areas corresponding to the surface group, wherein when any of the working areas is turned on, a portion of the light beam from the light source is transmitted to the display panel via the working area, and when any of the working areas is closed, the light is emitted from the light emitting source Source department The beam is substantially unable to pass through the work area of the a display panel; and a control unit electrically connected to the display panel and the light valve, the work is divided into a plurality of work area groups, and the control unit turns on different work area groups at different time points. The stereoscopic display device of claim 41, wherein the operations are divided into N work area groups, and N is a positive integer greater than or equal to 2, and the control unit turns the N work area groups on and off. The timing of the light beam passing through the set of work areas and the image displayed by the display panel are matched with each other. The stereoscopic display device of claim 40, wherein the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the light beam passing through each of the working area groups passes through The pixel groups are respectively concentrated in a plurality of viewing areas, and N-1 working areas of other N-1 working area groups are disposed between adjacent two working areas in each working area group. The stereoscopic display device of claim 43, wherein the pixel groups are M pixel groups, M is a positive integer greater than or equal to 2, and adjacent two pixels in each pixel group M-1 pixel columns belonging to other M-1 pixel groups are provided between the columns. The stereoscopic display device of claim 44, wherein the control unit causes the M pixel groups to display 1/N pictures of M different viewing angles at the same time. The stereoscopic display device of claim 41, wherein the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the working regions are inclined with respect to the pixel columns or Essentially parallel. The stereoscopic display device of claim 41, further comprising: a light valve disposed between the light guide plate and the display panel, the light valve having a plurality of work corresponding to the light control surface groups respectively And a control unit electrically connected to the display panel and the light valve, the display panel has a plurality of pixel groups, each pixel group has a plurality of pixel columns, and the control unit allows the light beam to pass through at the same time The working areas, and the light beams emerging from the working areas respectively converge in a plurality of viewing areas after passing through the pixel groups. The stereoscopic display device of claim 47, wherein the pixel groups are M pixel groups, M is a positive integer greater than or equal to 2, and adjacent two pixels in each pixel group. M-1 pixel columns belonging to other M-1 pixel groups are provided between the columns. The stereoscopic display device of claim 48, wherein the control unit causes the M pixel groups to display M different viewing angle images. The three-dimensional display device of claim 47, wherein the working areas are inclined or substantially parallel with respect to the pixel columns. The stereoscopic display device of claim 41, wherein the light valve is a light-coupled component, the light-coupled component has a plurality of light-switching switching regions, and the light-switching regions of the light-coupled component are the light In the working areas of the valve, the light coupling element is disposed between the light guide plate and the light control element, and each of the light coupling switching regions extends from the light guide plate to the light control element, and the control unit controls each of the light control elements Coupling the refractive index distribution of the light switching region to control the light output Whether the beam exiting the surface passes through the coupling switch region. The stereoscopic display device of claim 51, wherein the control unit is configured to cause each of the coupling light switching regions to completely fill a first substance and pass the light beam emitted from the light emitting surface through the coupling light a switching area, wherein the control unit is configured to fill each of the light-switching regions with the first substance near one end of the light guide plate and to fill the second substance with the first substance at the other end away from the light guide plate The light beam emerging from the light exiting surface is totally reflected at the interface between the first substance and the second substance, wherein the refractive index of the first substance is greater than the refractive index of the second substance. The stereoscopic display device of claim 52, wherein the refractive index of the first substance is substantially equal to the refractive index of the light guide plate. The stereoscopic display device of claim 52, wherein the light-coupling element comprises: a first substrate; a second substrate disposed between the first substrate and the light guide plate, the first substance and the a second substance is filled between the first substrate and the second substrate; a plurality of first film layers are located between the second substrate and the first substance and the second substance, and each of the first film layers An orthographic projection on the light-emitting surface coincides with an orthographic projection of each of the coupling light switching regions on the light-emitting surface; a plurality of second film layers between the second substrate and the first substance and the second substance Each of the second film layers is located between the two adjacent light-switching regions, and the adhesion between the first material and the first film layer is greater than the adhesion between the first material and the second film layer; a plurality of first electrodes, each of the first electrodes being disposed between the second substrate and the second film layer on opposite sides of the light-switching switching region; and at least one second electrode disposed on the first electrode Between the substrate and the second substrate, the control unit transmits the light-switching switching region completely by making the potential difference between the first electrode and the second electrode on each of the two coupling-switching regions substantially zero. Filling the first substance, the control unit is filled between the first electrode and the second electrode on the two sides of each of the coupling light switching regions by applying a potential difference to fill the light coupling switching region near one end of the light guide plate The first substance is filled with the second substance at the other end away from the light guide plate. The stereoscopic display device of claim 54, wherein the first film layer is a hydrophilic film, the second film layer is a hydrophobic film, the first substance is ionized water, and the second substance is air. The stereoscopic display device of claim 52, wherein the light-coupling element comprises: a first substrate; a second substrate disposed between the first substrate and the light guide plate, the first substance and the a second substance is filled between the first substrate and the second substrate; a second film layer is disposed between the second substrate and the first substance and the second substance, the second substance and the second The adhesion between the film layers is less than the adhesion between the first material and the second film layer; the plurality of first electrodes are disposed between the second film layer and the second substrate, and each of the couplings One of the first electrodes is disposed on opposite sides of the optical switching region; The at least one second electrode is disposed between the first substrate and the second substrate, and the control unit transmits a potential difference between the first electrode and the second electrode on two sides of each of the coupling switch regions. The light-switching switching region is completely filled with the first substance, and the control unit transmits the potential difference between the first electrode and the second electrode on each of the two coupling-switching regions by substantially zero The light-switching switching region is filled with the first substance near one end of the light guide plate and filled with the second substance at the other end away from the light guide plate. The stereoscopic display device of claim 56, wherein the second film layer is a hydrophobic film, the first substance is oil, and the second substance is ionized water. A stereoscopic display device includes: a backlight module, comprising: a light source for emitting a light beam; and a light guide plate having a light incident surface and a light exiting surface, the light beam entering the light guide plate from the light incident surface And the light-emitting surface exits the light guide plate; a display panel; and a light control element disposed between the display panel and the light guide plate, the light control element includes: a plurality of light control surface groups, each of the light control The surface group has a first surface and a second surface opposite to the light emitting surface of the light guide plate, and the second surface is inclined with respect to the light emitting surface of the light guide plate. At two angles, at least one of the first angle and the second angle falls within a range of 110 degrees to 120 degrees.