CN115315658B

CN115315658B - Light modulation module and switchable stereoscopic display device

Info

Publication number: CN115315658B
Application number: CN202280002927.1A
Authority: CN
Inventors: 张建伟
Original assignee: Deep Vision Technology Nanjing Co ltd
Current assignee: Deep Vision Technology Nanjing Co ltd
Priority date: 2021-06-30
Filing date: 2022-05-26
Publication date: 2024-04-09
Anticipated expiration: 2042-05-26
Also published as: CN115315658A; DE212022000123U1

Abstract

The application discloses a light modulation module and a switchable stereoscopic display device. The optical modulation module includes: a first substrate and a second substrate disposed opposite to each other; the first driving layer and the optical structure layer are arranged on one side of the first substrate, which is close to the second substrate; the second driving layer is arranged on one side of the second substrate close to the first substrate; an electro-optic material disposed between the first drive layer and the second drive layer; the orthographic projection of at least one of the first driving layer and the second driving layer on the plane where the light modulation module is located is in a discrete island structure.

Description

Light modulation module and switchable stereoscopic display device

Technical Field

The embodiment of the application relates to the technical field of display, for example, to a light modulation module and a switchable stereoscopic display device.

Background

With the development of display technology, switchable stereoscopic display devices have also begun to gain widespread attention of users. The switchable stereoscopic display device generally comprises a control system, a display module and a light modulation module, wherein the light modulation module can modulate image light emitted by the display module through a switching state of the light modulation module under the control of the control system, so that the two-dimensional (2D)/three-dimensional (3D) free switching of the display device is realized.

The light modulation module generally includes a lens substrate, a lens electrode, a lens structure, a liquid crystal, a spacer electrode, and a spacer substrate, which are sequentially stacked. The theoretical driving voltages required are different for each region of the thickness of the liquid crystal due to the presence of the lens structure. However, the lens electrode and the spacing electrode in the related art are all whole-surface electrodes, and the electric field intensity of each point in the whole-surface electrodes is the same, which can lead to that liquid crystal is completely standing in some areas and the refractive index of light sensed in the areas is deviated, so that the optical effect is affected; or the resulting area liquid crystal has exceeded its saturation voltage (also known as overdrive), resulting in a reduction in the lifetime of the liquid crystal and an increase in the power consumption of the light modulation module.

Disclosure of Invention

The application provides the light modulation module and the switchable stereoscopic display device, which can adjust the voltage applied to the electro-optic materials with different thicknesses, and ensure that the electro-optic materials work under proper conditions, thereby prolonging the service life of the electro-optic materials, reducing the power consumption of the light modulation module and improving the optical effect of the light modulation module; meanwhile, the requirement on the attaching precision is reduced, and mass production and manufacturing are facilitated.

In a first aspect, an embodiment of the present application provides a light modulation module, including: a first substrate and a second substrate disposed opposite to each other; the first driving layer and the optical structure layer are arranged on one side of the first substrate, which is close to the second substrate; the second driving layer is arranged on one side of the second substrate close to the first substrate; an electro-optic material disposed between the first drive layer and the second drive layer; wherein,

orthographic projection of at least one of the first driving layer and the second driving layer on a plane where the light modulation module is located is in a discrete island structure.

In a second aspect, embodiments of the present application further provide a switchable stereoscopic display device, including: a control system, a display module and a light modulation module as described in the first aspect; wherein,

the display module is connected with the control system and is arranged to emit image light under the control of the control system;

the light modulation module is connected with the control system and is arranged on one side of the display module, which emits image light, and the light modulation module is arranged to modulate the image light under the control of the control system so as to form a plane image or a stereoscopic image.

Drawings

FIG. 1 is a schematic cross-sectional view of a light modulation module according to the related art when no voltage is applied;

FIG. 2 is a schematic cross-sectional view of a light modulation module according to the related art when a voltage is applied;

fig. 3 is a schematic cross-sectional structure of a light modulation module according to an embodiment of the present application;

fig. 4 is a schematic top view of a light modulation module according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of another light modulation module according to an embodiment of the present disclosure;

fig. 6 is a schematic top view of another optical modulation module according to an embodiment of the present disclosure;

FIG. 7 is a schematic cross-sectional view of another optical modulation module according to an embodiment of the present disclosure;

FIG. 8 is a schematic cross-sectional view of another optical modulation module according to an embodiment of the present disclosure;

fig. 9 is a schematic cross-sectional structure of a light modulation module according to another embodiment of the present disclosure;

FIG. 10 is a schematic cross-sectional view of another light modulation module according to an embodiment of the present disclosure;

FIG. 11 is a schematic cross-sectional view of still another light modulation module according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a switchable stereoscopic display device according to an embodiment of the present application.

Detailed Description

The present application is described in detail below with reference to the accompanying drawings and examples.

Meanwhile, the description of the drawings and the embodiments is illustrative and not restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the thickness of some layers, films, panels, regions, etc. may be exaggerated in the drawings for understanding and ease of description. It will also be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, "on … …" refers to positioning an element on or under another element, but does not in essence refer to positioning on the upper side of another element according to the direction of gravity. For ease of understanding, the figures of this application depict an element on the top side of another element.

In addition, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated element but not the exclusion of any other element.

It should also be noted that references to "and/or" in the embodiments of the present application are intended to include any and all combinations of one or more of the associated listed items. Various components are described in this application in terms of "first," "second," "third," etc., but these components should not be limited by these terms. These terms are only used to distinguish one element from another element. Also, the singular forms "a," "an," and "the ()" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

While an embodiment may be implemented differently, the process sequence may be performed differently than as described. For example, two consecutively described processes may be performed at substantially the same time or in an order reverse to the order described.

Stereoscopic display is an implementation mode of virtual reality, and the principle is that the parallax of two eyes of a viewer is fused to generate stereoscopic impression by utilizing the difference between image information seen by the left eye and image information seen by the right eye of the viewer. Common stereoscopic display techniques utilize 3D glasses to achieve the transfer of left and right eye images to the left and right eyes of a viewer, respectively; the naked eye stereoscopic display technology gets rid of the constraint of 3D glasses, improves the comfort level of viewers, and becomes a future development direction and target.

In the naked eye stereoscopic display technology, a switchable stereoscopic display device generally comprises a control system, a display module and a light modulation module, wherein the light modulation module can modulate image light emitted by the display module through a switch state of the light modulation module under the control of the control system, so that 2D/3D free switching of the display device is realized. Fig. 1 is a schematic cross-sectional structure of a related art light modulation module when no voltage is applied, and fig. 2 is a schematic cross-sectional structure of a related art light modulation module when a voltage is applied. The light modulation module comprises a lens substrate 1, a lens electrode 2, a lens structure 3, liquid crystal 4, a spacing electrode 5 and a spacing substrate 6 which are sequentially stacked. As shown in fig. 1, when no voltage is applied between the lens electrode 2 and the spacer electrode 5, the liquid crystal 4 is in a lying state; as shown in fig. 2, when a voltage is applied between the lens electrode 2 and the spacer electrode 5, the liquid crystal 4 is in a standing state. Therefore, the light modulation module can form a light modulator to modulate image light emitted by the display module, and the 2D/3D free switching of the display device is realized.

The thickness of the liquid crystal is different in different regions due to the presence of the lens structure 3, and thus the theoretical driving voltages required are different. However, as shown in fig. 1 and 2, the lens electrode 2 and the spacer electrode 5 are all whole-surface electrodes, and the electric field intensity of each point in the whole-surface electrodes is the same, which causes that liquid crystal is completely standing in some areas and the refractive index of light sensed in the areas is deviated, and the optical effect is affected; or the resulting area liquid crystal has exceeded its saturation voltage (also known as overdrive), resulting in a reduction in the lifetime of the liquid crystal and an increase in the power consumption of the light modulation module. In order to solve the above problems, the embodiments of the present application provide a light modulation module and a switchable stereoscopic display device, which can adjust voltages applied to electro-optic materials with different thicknesses, and ensure that the electro-optic materials work under appropriate conditions, thereby prolonging the service life of the electro-optic materials, reducing power consumption of the light modulation module, and improving optical effects of the light modulation module; meanwhile, the requirement on the attaching precision is reduced, and mass production and manufacturing are facilitated.

The light modulation module, the switchable stereoscopic display device and the technical effects thereof are described in detail below.

The embodiment of the application provides a light modulation module, including: a first substrate and a second substrate disposed opposite to each other; the first driving layer and the optical structure layer are arranged on one side of the first substrate, which is close to the second substrate; the second driving layer is arranged on one side of the second substrate close to the first substrate; an electro-optic material disposed between the first and second drive layers.

The first driving layer and the second driving layer may adopt any one of the following three designs:

the orthographic projection of the first driving layer on the plane of the light modulation module is designed to be in a discrete island structure, and the orthographic projection of the second driving layer on the plane of the light modulation module is overlapped with the orthographic projection of the first substrate on the plane of the light modulation module.

The orthographic projection of the first driving layer on the plane of the light modulation module is overlapped with the orthographic projection of the first substrate on the plane of the light modulation module, and the orthographic projection of the second driving layer on the plane of the light modulation module is in a discrete island structure.

And the orthographic projection of the third design, the first driving layer and the second driving layer on the plane of the light modulation module is in a discrete island structure.

It should be noted that, in the embodiment of the present application, the driving manner of the first driving layer and the second driving layer may be Passive addressing (PM) driving or Active Addressing (AM) driving. For example, when the driving manner of the first driving layer and the second driving layer is passive addressing driving, the first driving layer and the second driving layer may be controlled in units of rows/columns, respectively; when the driving manner of the first driving layer and the second driving layer is active addressing driving, the first driving layer and the second driving layer can realize individual control of each electrode (e.g., TFT unit) included therein.

The three designs described above allow the first drive layer and/or the second drive layer to be discrete, individually addressable electrodes instead of full area electrodes. By applying different voltages to the electrodes which can be independently addressed, the electro-optical materials with different thicknesses can work under proper conditions (namely, the electro-optical materials can not only stand completely but also can not cause overdrive), thereby prolonging the service life of the electro-optical materials, reducing the power consumption of the optical modulation module and improving the optical effect of the optical modulation module. Meanwhile, the discrete independently addressable electrodes can be free from the requirement on the attaching precision in the manufacturing process, and are convenient for mass production and manufacturing. For ease of understanding, the three designs described above are described in detail below with reference to the accompanying drawings.

In a first possible implementation manner, fig. 3 shows a schematic cross-sectional structure of a light modulation module provided in an embodiment of the present application, and fig. 4 shows a schematic top view of a light modulation module provided in an embodiment of the present application. As shown in fig. 3 and 4, the light modulation module includes: a first substrate 101 and a second substrate 102 disposed opposite to each other; a first driving layer 103 and an optical structure layer 104 disposed on a side of the first substrate 101 near the second substrate 102; a second driving layer 105 disposed on a side of the second substrate 102 close to the first substrate 101; an electro-optic material 106 disposed between the first driving layer 103 and the second driving layer 105.

Alternatively, the first substrate 101 may be a lens substrate, and the second substrate 102 may be a spacer substrate; alternatively, the first substrate 101 may be a spacer substrate and the second substrate 102 may be a lens substrate. The first substrate 101 and the second substrate 102 are generally made of transparent materials such as glass and resin.

The first driving layer 103 is disposed between the optical structure layer 104 and the first substrate 101. The first driving layer 103 includes a plurality of first electrodes, and orthographic projections of the plurality of first electrodes on a plane where the light modulation module is located are in a discrete island structure (i.e., the first electrodes are discrete independently addressable electrodes); the second driving layer 105 includes a second electrode, where the orthographic projection of the second electrode on the plane of the light modulation module coincides with the orthographic projection of the first substrate 101 on the plane of the light modulation module (i.e., the second electrode is a planar electrode). The first driving layer 103 and the second driving layer 105 may be made of transparent conductive materials such as Indium Tin Oxide (ITO).

With continued reference to fig. 3, in an embodiment, the light modulation module may further include: a first alignment layer 107 and a second alignment layer 108. The first alignment layer 107 is disposed between the first driving layer 103 and the electro-optic material 106 and is in direct contact with the electro-optic material 106; the second alignment layer 108 is disposed between the second driving layer 105 and the electro-optic material 106 and is in direct contact with the electro-optic material 106. The first alignment layer 107 and the second alignment layer 108 may be made of polyimide or the like.

The optical structure layer 104 includes a plurality of lenses (the lenses are shown as cylindrical lenses in fig. 3 and 4, for example) arranged in sequence. As shown in fig. 3, each lenticular lens may have a different thickness of the electro-optic material 106 thereon due to the limitation of its own shape, and thus the number of first electrodes corresponding to each lens is plural. Thus, by adjusting the voltage applied to the first electrode, different thicknesses of the electro-optic material 106 may be operated under appropriate conditions (i.e., the electro-optic material 106 may be fully standing without overdrive). Meanwhile, since the first electrode is a discrete independently addressable electrode, no matter whether the optical structural layer 104 has an inclination angle or not relative to the first substrate 101, the voltage applied to the first electrode at the corresponding position can be adaptively adjusted according to the actual position, inclination angle, width and other parameters of the optical structural layer 104, so that the parameters of the optical structural layer 104 can be matched, the requirement that the change of the voltage is exactly matched with the thickness change of the actual electro-optic material 106 is met, and the attaching precision is reduced.

It will be appreciated that the greater the number of first electrodes per lens, the finer the control of the different thickness of electro-optic material 106. Considering the process precision and the production cost of the light modulation module, the number of the first electrodes corresponding to each lens can be designed according to actual requirements.

In one embodiment, the thicker the electro-optic material 106, the greater the drive voltage it requires, and thus the voltage applied across each first electrode is positively correlated to the thickness of the electro-optic material 106 over that first electrode.

Alternatively, the first electrode may be an independently addressable thin film transistor (Thin Film Transistor, TFT) cell for ease of fabrication. The plurality of first electrodes are uniformly distributed on one side of the first substrate 101 close to the second substrate 102.

Fig. 5 is a schematic cross-sectional structure of another optical modulation module according to an embodiment of the present application. Unlike the light modulation module shown in fig. 3, the optical structure layer 104 includes a plurality of lenses, which are prisms, arranged in sequence. Of course, in the solution provided in the embodiment of the present application, the lens may also have other shapes, which is not limited in the embodiment of the present application.

Meanwhile, a first electrode is formed in a composition mode, and the orthographic projection of the first electrode on a plane where the light modulation module is located is in any one or a combination of a plurality of circular, elliptic, triangular, quadrilateral and polygonal shapes. Exemplary, as shown in fig. 4, the orthographic projection of the first electrode on the plane of the light modulation module is quadrilateral; fig. 6 is a schematic top view of another optical modulation module according to the embodiment of the present application, where, as shown in fig. 6, the orthographic projection of the first electrode on the plane of the optical modulation module is a combination of triangle and circle.

Fig. 7 is a schematic cross-sectional structure of another optical modulation module according to an embodiment of the present application. Unlike the light modulation module shown in fig. 3 described above, the first driving layer 103 is disposed between the optical structure layer 104 and the electro-optic material 106. The first driving layer 103 is disposed above the optical structural layer 104, and still can enable the electro-optic materials with different thicknesses to work under proper conditions (i.e., the electro-optic materials can not only stand completely, but also can not cause overdrive) by applying different voltages to the independently addressable electrodes (i.e., the first electrodes). Meanwhile, the discrete independently addressable electrodes can be free from the requirement on the attaching precision in the manufacturing process, and are convenient for mass production and manufacturing.

In a second possible implementation manner, fig. 8 shows a schematic cross-sectional structure of still another optical modulation module provided in an embodiment of the present application. As shown in fig. 8, the optical modulation module includes: a first substrate 101 and a second substrate 102 disposed opposite to each other; a first driving layer 103 and an optical structure layer 104 disposed on a side of the first substrate 101 near the second substrate 102; a second driving layer 105 disposed on a side of the second substrate 102 close to the first substrate 101; an electro-optic material 106 disposed between the first driving layer 103 and the second driving layer 105.

The first driving layer 103 is disposed between the optical structure layer 104 and the first substrate 101. The first driving layer 103 includes a first electrode, where the orthographic projection of the first electrode on the plane of the light modulation module coincides with the orthographic projection of the first substrate 101 on the plane of the light modulation module (i.e., the first electrode is a planar electrode); the second driving layer 105 includes a plurality of second electrodes, and orthographic projections of the plurality of second electrodes on a plane on which the light modulation module is located are in a discrete island structure (i.e., the second electrodes are discrete individually addressable electrodes). The first driving layer 103 and the second driving layer 105 may be made of transparent conductive material such as ITO.

With continued reference to fig. 8, in an embodiment, the light modulation module may further include: a first alignment layer 107 and a second alignment layer 108. The first alignment layer 107 is disposed between the first driving layer 103 and the electro-optic material 106 and is in direct contact with the electro-optic material 106; the second alignment layer 108 is disposed between the second driving layer 105 and the electro-optic material 106 and is in direct contact with the electro-optic material 106. The first alignment layer 107 and the second alignment layer 108 may be made of polyimide or the like.

The optical structure layer 104 includes a plurality of lenses (the lenses are shown as cylindrical lenses in fig. 8 for example) arranged in sequence. As shown in fig. 8, each lenticular lens may have a different thickness of the electro-optic material 106 thereon due to the limitation of its own shape, and thus the number of the second electrodes corresponding to each lens is plural. Thus, by adjusting the voltage applied to the second electrode, different thicknesses of the electro-optic material 106 may be operated under appropriate conditions (i.e., the electro-optic material 106 may be fully standing without overdrive). Meanwhile, since the second electrode is a discrete independently addressable electrode, no matter whether the optical structural layer 104 has an inclination angle or not relative to the first substrate 101, the voltage applied to the second electrode at the corresponding position can be adaptively adjusted according to the actual position, inclination angle, width and other parameters of the optical structural layer 104, so that the parameters of the optical structural layer 104 can be matched, the requirement that the change of the voltage is exactly matched with the thickness change of the actual electro-optic material 106 is met, and the attaching precision is reduced.

It will be appreciated that the greater the number of second electrodes per lens, the finer the control of the different thickness of electro-optic material 106. The number of the second electrodes corresponding to each lens can be designed according to actual requirements in consideration of the process precision and the production cost of the light modulation module.

In one embodiment, the thicker the electro-optic material 106, the greater the drive voltage it requires, and thus the voltage applied across each second electrode is positively correlated to the thickness of the electro-optic material 106 beneath that second electrode.

Alternatively, the second electrode may be an independently addressable TFT element for ease of fabrication. The plurality of second electrodes are uniformly distributed on the side of the second substrate 102 close to the first substrate 101.

Fig. 9 is a schematic cross-sectional structure of another optical modulation module according to an embodiment of the present application. Unlike the light modulation module shown in fig. 8 described above, the first driving layer 103 is disposed between the optical structure layer 104 and the electro-optic material 106. The first driving layer 103 is disposed above the optical structural layer 104, and still can make the electro-optic material with different thickness work under proper conditions (i.e. the electro-optic material can not only stand completely, but also can not cause overdrive) by applying different voltages to the independently addressable electrodes (i.e. the second electrodes). Meanwhile, the discrete independently addressable electrodes can be free from the requirement on the attaching precision in the manufacturing process, and are convenient for mass production and manufacturing.

In a third possible implementation manner, fig. 10 shows a schematic cross-sectional structure of still another light modulation module provided in an embodiment of the present application. As shown in fig. 10, the optical modulation module includes: a first substrate 101 and a second substrate 102 disposed opposite to each other; a first driving layer 103 and an optical structure layer 104 disposed on a side of the first substrate 101 near the second substrate 102; a second driving layer 105 disposed on a side of the second substrate 102 close to the first substrate 101; an electro-optic material 106 disposed between the first driving layer 103 and the second driving layer 105.

The first driving layer 103 is disposed between the optical structure layer 104 and the first substrate 101. The first driving layer 103 includes a plurality of first electrodes, and orthographic projections of the plurality of first electrodes on a plane where the light modulation module is located are in a discrete island structure (i.e., the first electrodes are discrete independently addressable electrodes); the second driving layer 105 includes a plurality of second electrodes, and orthographic projections of the plurality of second electrodes on a plane on which the light modulation module is located are in a discrete island structure (i.e., the second electrodes are also discrete independently addressable electrodes). The first driving layer 103 and the second driving layer 105 may be made of transparent conductive material such as ITO.

In an embodiment, the front projection of the first driving layer 103 on the plane of the light modulation module may be completely overlapped with the front projection of the second driving layer 105 on the plane of the light modulation module (i.e. each first electrode corresponds to one second electrode, the first electrode and the second electrode have the same size, and the first electrode and the second electrode are completely aligned), or may not be completely overlapped. When the front projection of the first driving layer 103 on the plane of the light modulation module is completely overlapped with the front projection of the second driving layer 105 on the plane of the light modulation module, the first driving layer 103 and the second driving layer 105 can share a mask plate during manufacturing, so that the process difficulty is reduced.

With continued reference to fig. 10, in an embodiment, the light modulation module may further include: a first alignment layer 107 and a second alignment layer 108. The first alignment layer 107 is disposed between the first driving layer 103 and the electro-optic material 106 and is in direct contact with the electro-optic material 106; the second alignment layer 108 is disposed between the second driving layer 105 and the electro-optic material 106 and is in direct contact with the electro-optic material 106. The first alignment layer 107 and the second alignment layer 108 may be made of polyimide or the like.

The optical structure layer 104 includes a plurality of lenses (the lenses are shown as cylindrical lenses in fig. 10 for example) arranged in this order. As shown in fig. 10, each lenticular lens has a different thickness of the electro-optic material 106 above it due to the limitation of its own shape, and therefore, the number of first electrodes corresponding to each lens is plural, and the number of second electrodes corresponding to each lens is plural. Thus, by adjusting the voltages applied by the first and second electrodes, different thicknesses of the electro-optic material 106 may be operated under appropriate conditions (i.e., the electro-optic material 106 may be fully standing without overdrive). Meanwhile, since the first electrode and the second electrode are discrete independently addressable electrodes, no matter whether the optical structural layer 104 has an inclination angle or not relative to the first substrate 101, the parameters of the optical structural layer 104 can be matched by adaptively adjusting the voltages applied to the first electrode and the second electrode at corresponding positions according to the actual position, the inclination angle, the width and other parameters of the optical structural layer 104, so that the requirement of accurately matching the voltage change with the thickness change of the actual electro-optic material 106 and reducing the attaching precision is met.

In one embodiment, the thicker the electro-optic material 106, the greater the drive voltage it requires, and thus the voltage applied across each first electrode is positively correlated to the thickness of the electro-optic material 106 over that first electrode; the voltage applied across each second electrode is positively correlated to the thickness of the electro-optic material 106 beneath that second electrode.

Alternatively, the first electrode and the second electrode may be individually addressable TFT elements for ease of fabrication. The first electrodes are uniformly distributed on one side of the first substrate 101 close to the second substrate 102; the plurality of second electrodes are uniformly distributed on the side of the second substrate 102 close to the first substrate 101.

Fig. 11 is a schematic cross-sectional view of still another optical modulation module according to an embodiment of the present application. Unlike the light modulation module shown in fig. 10 described above, the first driving layer 103 is disposed between the optical structure layer 104 and the electro-optic material 106. The first driving layer 103 is disposed above the optical structural layer 104, and still can enable the electro-optic materials with different thicknesses to work under proper conditions (i.e., the electro-optic materials can stand completely without overdrive) by applying different voltages to the independently addressable electrodes (i.e., the first electrode and the second electrode). Meanwhile, the discrete independently addressable electrodes can be free from the requirement on the attaching precision in the manufacturing process, and are convenient for mass production and manufacturing.

In the above-described embodiments of the present application, the electro-optic material 106 may generally be a liquid crystal; the material of the optical structure layer 104 may be generally transparent resin or glass.

The embodiment of the application provides a light modulation module, which comprises a first substrate and a second substrate which are oppositely arranged; the first driving layer and the optical structure layer are arranged on one side of the first substrate, which is close to the second substrate; the second driving layer is arranged on one side of the second substrate close to the first substrate; an electro-optic material disposed between the first drive layer and the second drive layer; the orthographic projection of the first driving layer and/or the second driving layer on the plane where the light modulation module is located is in a discrete island structure. By designing the first drive layer and/or the second drive layer such that the first drive layer and/or the second drive layer is no longer a full area electrode but rather a discrete individually addressable electrode. By applying different voltages to the electrodes which can be independently addressed, the voltages to which the electro-optic materials with different thicknesses are subjected are adjusted, and the electro-optic materials are ensured to work under proper conditions (namely, the electro-optic materials can not only stand completely but also can not cause overdrive), so that the service life of the electro-optic materials is prolonged, the power consumption of the optical modulation module is reduced, and the optical effect of the optical modulation module is improved. Meanwhile, as the first driving layer and/or the second driving layer are/is the discrete independently addressable electrodes, the requirement on the attaching precision is not limited in the manufacturing process, and the mass production is convenient.

Fig. 12 is a schematic structural diagram of a switchable stereoscopic display device according to an embodiment of the present application. As shown in fig. 12, the switchable stereoscopic display device includes: a control system 201, a display module 202 and a light modulation module 203 as described in any of the above embodiments.

The display module 202 is connected with the control system 201, and the display module 202 is arranged to emit image light under the control of the control system 201;

the light modulation module 203 is connected to the control system 201 and disposed on a side of the display module 202 emitting image light, and the light modulation module 203 is configured to modulate the image light under the control of the control system 201 to form a planar image or a stereoscopic image.

In an embodiment, the display module 202 may be any one of a liquid crystal display device (Liquid Crystal Display, LCD), a Light Emitting Diode (Light Emitting Diode, LED) display device, an Organic Light-Emitting Diode (OLED) display device, an electronic paper, a QLED (Quantum Dot Light Emitting Diodes, quantum dot Light Emitting) display device, a micro LED (micro LED) display device, a micro OLED display device, a projection module, and the like, which is not limited in this application.

The scheme provided by the application can be applied to the switchable naked eye 3D optical device, can be also applied to the switchable peep-proof device, and can also be applied to other switchable light modulation devices applying liquid crystal, and the embodiment of the application is not limited in this way.

Claims

1. A light modulation module comprising: a first substrate and a second substrate disposed opposite to each other; the first driving layer and the optical structure layer are arranged on one side of the first substrate, which is close to the second substrate; the second driving layer is arranged on one side of the second substrate, close to the first substrate; an electro-optic material disposed between the first and second drive layers; wherein,

orthographic projection of at least one of the first driving layer and the second driving layer on a plane where the light modulation module is located is in a discrete island structure;

the island-shaped structure is a combination of two shapes of a circle, an ellipse and a polygon; the two shapes are alternately arranged along a direction parallel to the plane of the light modulation module.

2. The light modulation module of claim 1, wherein the island structure is a combination of circles and triangles that alternate in a direction parallel to a plane in which the light modulation module lies.

3. The light modulation module of claim 1, wherein,

the first driving layer comprises a plurality of first electrodes, and orthographic projections of the first electrodes on a plane where the light modulation module is located are in discrete island structures; the second driving layer comprises a second electrode, and the orthographic projection of the second electrode on the plane of the light modulation module is overlapped with the orthographic projection of the first substrate on the plane of the light modulation module; or,

the first driving layer comprises a first electrode, and the orthographic projection of the first electrode on the plane of the light modulation module coincides with the orthographic projection of the first substrate on the plane of the light modulation module; the second driving layer comprises a plurality of second electrodes, and orthographic projections of the second electrodes on a plane where the light modulation module is located are in discrete island structures; or,

the first driving layer includes a plurality of first electrodes, and the second driving layer includes a plurality of second electrodes; orthographic projections of the first electrodes and the second electrodes on the plane of the light modulation module are of discrete island structures, and orthographic projections of the first driving layer on the plane of the light modulation module are completely overlapped with orthographic projections of the second driving layer on the plane of the light modulation module.

4. The light modulation module of claim 1, wherein,

the first driving layer is arranged between the optical structure layer and the first substrate; or,

the first driving layer is disposed between the optical structure layer and the electro-optic material.

5. The light modulation module of claim 1, further comprising: a first alignment layer and a second alignment layer; wherein,

the first alignment layer is arranged between the first driving layer and the electro-optic material and is in direct contact with the electro-optic material; the second alignment layer is disposed between the second driving layer and the electro-optic material and is in direct contact with the electro-optic material.

6. The light modulation module of claim 1, wherein the optical structure layer comprises a plurality of lenses arranged in sequence;

under the condition that orthographic projection of the first driving layer on a plane where the light modulation module is located is in a discrete island structure, the first driving layer comprises a plurality of first electrodes, and the number of the first electrodes corresponding to each lens is a plurality.

7. The light modulation module of claim 6, wherein the voltage applied across each of the first electrodes is positively correlated with the thickness of the electro-optic material over the first electrodes.

8. The light modulation module of claim 6, wherein each of the first electrodes is an independently addressable thin film transistor, TFT, cell.

9. The light modulation module of claim 6, wherein the plurality of first electrodes are uniformly distributed on a side of the first substrate adjacent to the second substrate.

10. The light modulation module of claim 1, wherein the optical structure layer comprises a plurality of lenses arranged in sequence;

under the condition that orthographic projection of the second driving layer on a plane where the light modulation module is located is in a discrete island structure, the second driving layer comprises a plurality of second electrodes, and the number of the second electrodes corresponding to each lens is a plurality.

11. The light modulation module of claim 10, wherein the voltage applied across each of the second electrodes is positively correlated with the thickness of the electro-optic material beneath the second electrode.

12. The light modulation module of claim 10, wherein each of the second electrodes is an independently addressable TFT cell.

13. The light modulation module of claim 10, wherein the plurality of second electrodes are uniformly distributed on a side of the second substrate adjacent to the first substrate.

14. The light modulation module according to claim 6 or 10, wherein each of the lenses is a lenticular lens.

15. The light modulation module of claim 1, wherein the electro-optic material is a liquid crystal.

16. A switchable stereoscopic display device comprising: a control system, a display module and a light modulation module as claimed in any one of claims 1-15; wherein,

the light modulation module is connected with the control system and is arranged at one side of the display module, which emits the image light, and the light modulation module is arranged to modulate the image light under the control of the control system to form a plane image or a three-dimensional image;

the first driving layer comprises a plurality of first electrodes, and orthographic projections of the first electrodes on a plane where the light modulation module is located are of discrete island structures; and/or the second driving layer comprises a plurality of second electrodes, and orthographic projections of the second electrodes on a plane where the light modulation module is located are of discrete island structures;