CN115315658A

CN115315658A - Light modulation module and switchable three-dimensional display device

Info

Publication number: CN115315658A
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: 2022-11-08
Anticipated expiration: 2042-05-26
Also published as: CN115315658B; DE212022000123U1

Abstract

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

Description

Light modulation module and switchable three-dimensional 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 are also beginning to gain wide attention of users. The switchable stereoscopic display device generally includes 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 the on-off state of the light modulation module under the control of the control system, so as to realize free switching of two-dimensional (2-dimension, 2D)/three-dimensional (3-dimension, 3D) of the display device.

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. Due to the presence of the lens structure, the thickness of the liquid crystal varies from region to region, and therefore the theoretical driving voltage required varies. However, in the related art, the lens electrode and the spacer electrode are all full-surface electrodes, and the electric field intensity of each point in the electrodes is the same, which may cause that some areas of liquid crystal completely stand, and some areas of liquid crystal do not completely stand, so that the refractive index of light sensed in the areas is deviated, and the optical effect is affected; or some regions of the liquid crystal exceed its saturation voltage (also called overdrive), resulting in a reduction of the lifetime of the liquid crystal and an increase of the power consumption of the light modulation module.

Disclosure of Invention

The application provides a light modulation module and a switchable three-dimensional display device, which can adjust the voltage applied to electro-optical materials with different thicknesses and ensure that the electro-optical materials work under a proper condition, so that the service life of the electro-optical materials is prolonged, the power consumption of the light modulation module is reduced, and the optical effect of the light modulation module is improved; meanwhile, the requirement on the bonding precision is reduced, and the mass production is facilitated.

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

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

In a second aspect, an embodiment of the present application further provides 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 first and the second end of the pipe are connected with each other,

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 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 to form a planar image or a three-dimensional image.

Drawings

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

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

fig. 3 is a schematic cross-sectional view of an optical modulation module according to an embodiment of the present disclosure;

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 diagram illustrating a top view of another light modulation module according to an embodiment of the present disclosure;

fig. 7 is a schematic cross-sectional view of another light modulation module provided in this embodiment of the present application;

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

fig. 9 is a schematic cross-sectional structure diagram of another light modulation module provided in this embodiment of the present application;

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

FIG. 11 is a schematic cross-sectional view of 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 will be described in detail with reference to the accompanying drawings and examples.

Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as 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 8230" \\ 8230 "; on" means to position an element on or under another element, but does not essentially mean to position on the upper side of the other element according to the direction of gravity. For ease of understanding, the drawings of this application depict one element on top of another.

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

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

While certain embodiments may be practiced differently, the process sequence may be performed differently than described. For example, two consecutively described processes may be performed at substantially the same time or in an order opposite to the described order.

The principle of stereoscopic display is to utilize the difference between image information seen by the left eye and image information seen by the right eye of a viewer to enable binocular parallax of the viewer to be fused to generate stereoscopic effect. A common stereoscopic display technology is implemented by using 3D glasses to respectively transmit left and right eye images to left and right eyes of a viewer; the naked eye stereoscopic display technology gets rid of the constraint of 3D glasses, improves the comfort of viewers, and becomes the development direction and target in the future.

In the naked eye stereoscopic display technology, 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 the on-off state of the light modulation module under the control of the control system, so that the free switching of 2D/3D of the display device is realized. Fig. 1 is a schematic cross-sectional view of a light modulation module in the related art when no voltage is applied, and fig. 2 is a schematic cross-sectional view of a light modulation module in the related art when a voltage is applied. The light modulation module comprises a lens substrate 1, a lens electrode 2, a lens structure 3, a 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 space electrode 5, the liquid crystal 4 is in a state of lying down; as shown in fig. 2, when a voltage is applied between the lens electrode 2 and the space 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.

Due to the presence of the lenticular structure 3, the thickness of the liquid crystal is different in different areas and therefore the required theoretical drive voltage is different. However, as shown in fig. 1 and fig. 2, the lens electrode 2 and the spacer electrode 5 are all plane electrodes, and the electric field intensity of each point in the plane electrodes is the same, which may cause some areas of the liquid crystal to completely stand and some areas not to completely stand, resulting in the deviation of the refractive index sensed by the light in the area, and affecting the optical effect; or some regions of the liquid crystal exceed its saturation voltage (also called overdrive), resulting in a reduction of the lifetime of the liquid crystal and an increase of the power consumption of the light modulation module. In order to solve the above problems, embodiments of the present application provide an optical modulation module and a switchable stereoscopic display device, which can adjust voltages applied to electro-optical materials with different thicknesses, and ensure that the electro-optical materials work under appropriate conditions, so as to prolong the service life of the electro-optical materials, reduce the power consumption of the optical modulation module, and improve the optical effect of the optical modulation module; meanwhile, the requirement on the bonding precision is reduced, and the mass production is 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 an optical modulation module, includes: the first substrate and the second substrate are oppositely arranged; the first driving layer and the optical structure layer are arranged on one side of the first substrate close to the second substrate; the second driving layer is arranged on one side, close to the first substrate, of the second substrate; an electro-optic material disposed between the first and second drive layers.

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

the orthographic projection of the first driving layer and the orthographic projection of the first driving layer on the plane where the light modulation module is located are designed to be discrete island-shaped structures, and the orthographic projection of the second driving layer on the plane where the light modulation module is located is superposed with the orthographic projection of the first substrate on the plane where the light modulation module is located.

And designing a second driving layer, wherein the orthographic projection of the first driving layer on the plane where the light modulation module is located is superposed with the orthographic projection of the first substrate on the plane where the light modulation module is located, and the orthographic projection of the second driving layer on the plane where the light modulation module is located is in a discrete island-shaped structure.

And designing the orthographic projections of the first driving layer and the second driving layer on the plane where the light modulation module is located to be discrete island-shaped structures.

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. Illustratively, 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 independent control of each electrode (such as a TFT unit) included therein.

The three designs are achieved by designing the first and/or second drive layers such that they are no longer full-area electrodes but are discrete, independently addressable electrodes. Different voltages are applied to the independently addressable electrodes, so that the electro-optical material with different thicknesses can work under a proper condition (namely, the electro-optical material can stand completely and cannot be overdriven), the service life of the electro-optical material is prolonged, the power consumption of the light modulation module is reduced, and the optical effect of the light modulation module is improved. Meanwhile, discrete independently addressable electrodes can be manufactured without being limited by the requirement on the bonding precision, and the manufacturing method is convenient for mass production. For the sake of understanding, the three designs are described in detail below with reference to the drawings.

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

Optionally, 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 a transparent material such as glass or 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-shaped structure (that is, the first electrodes are discrete independently addressable electrodes); the second driving layer 105 includes a second electrode, and an orthogonal projection of the second electrode on the plane of the light modulation module coincides with an orthogonal 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 a transparent conductive material 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. A first alignment layer 107 is disposed between the first drive layer 103 and the electro-optic material 106, in direct contact with the electro-optic material 106; a second alignment layer 108 is arranged between the second drive layer 105 and the electro-optic material 106 and 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 arranged in sequence (the lenses are drawn in fig. 3 and 4 by taking the lenses as cylindrical lenses as an example). As shown in fig. 3, each lenticular lens has a different thickness of the electro-optic material 106 due to its shape, and thus, the number of the first electrodes corresponding to each lenticular lens is multiple. Thus, by adjusting the voltage applied to the first electrode, the electro-optic material 106 with different thicknesses can be operated under appropriate conditions (i.e., the electro-optic material 106 can be fully stood without causing overdrive). Meanwhile, since the first electrodes are discrete independently addressable electrodes, no matter whether the optical structure layer 104 has an inclination angle or an inclination angle with respect to the first substrate 101, the parameters of the optical structure layer 104 can be matched only by adaptively adjusting the voltage applied to the first electrodes at the corresponding positions according to the parameters of the optical structure layer 104, such as the actual position, the inclination angle, the width, and the like, so that the requirement of accurately matching the size change of the voltage with the thickness change of the actual electro-optic material 106 is met, and the requirement of bonding accuracy is reduced.

It will be appreciated that the greater the number of first electrodes per lens, the more fine the control of the different thicknesses 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 thickness of the electro-optic material 106, the greater the driving voltage required, and thus, the voltage applied to each first electrode is positively correlated to the thickness of the electro-optic material 106 above that first electrode.

Alternatively, for ease of fabrication, the first electrode may be an independently addressable Thin Film Transistor (TFT) cell. 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 view illustrating another light modulation module according to an embodiment of the present disclosure. Unlike the light modulation module shown in fig. 3, the optical structure layer 104 includes a plurality of lenses arranged in sequence, and the lenses are prisms. Of course, in the solutions provided in the embodiments of the present application, the lens may also have other shapes, and the embodiments of the present application do not limit this.

Meanwhile, a first electrode is formed in the composition mode, and the shape of the orthographic projection of the first electrode on the plane where the light modulation module is located is any one or combination of multiple of a circle, an ellipse, a triangle, a quadrangle and a polygon. For example, as shown in fig. 4, the orthographic projection of the first electrode on the plane where the light modulation module is located is quadrilateral; fig. 6 is a schematic top view of another light modulation module according to an embodiment of the present disclosure, and as shown in fig. 6, an orthographic projection of the first electrode on a plane of the light modulation module is a combination of a triangle and a circle.

Fig. 7 is a schematic cross-sectional view illustrating a light modulation module according to another embodiment of the present disclosure. 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 structure layer 104, and still can apply different voltages to the independently addressable electrodes (i.e. the first electrodes), so that the electro-optical material with different thicknesses can work under proper conditions (i.e. the electro-optical material can stand completely without causing overdrive). Meanwhile, the discrete independently addressable electrodes can be manufactured in a manufacturing process without being limited by the requirement on the bonding precision, and the manufacturing method is convenient for mass production.

In a second possible implementation manner, fig. 8 illustrates a schematic cross-sectional structure of a further light 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 adjacent to the second substrate 102; a second driving layer 105 disposed on the second substrate 102 on a side close to the first substrate 101; an electro-optic material 106 disposed between the first drive layer 103 and the second drive 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, and an orthographic projection of the first electrode on the plane where the light modulation module is located coincides with an orthographic projection of the first substrate 101 on the plane where the light modulation module is located (that is, 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 where the light modulation module is located are in a discrete island-shaped structure (that is, the second electrodes are discrete independently addressable electrodes). The first driving layer 103 and the second driving layer 105 may be made of a 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. A first alignment layer 107 is disposed between the first drive layer 103 and the electro-optic material 106 and in direct contact with the electro-optic material 106; a second alignment layer 108 is arranged between the second drive layer 105 and the electro-optic material 106 and 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 arranged in sequence (the lenses are drawn by taking the lenses as cylindrical lenses as an example in fig. 8). As shown in fig. 8, each lenticular lens has a different thickness of the electro-optic material 106 due to its shape, and thus the number of the second electrodes corresponding to each lenticular lens is plural. Thus, by adjusting the voltage applied to the second electrode, the electro-optic material 106 with different thicknesses can be operated under appropriate conditions (i.e., the electro-optic material 106 can be fully stood without causing overdrive). Meanwhile, since the second electrodes are discrete independently addressable electrodes, no matter whether the optical structure layer 104 has an inclination angle or an inclination angle with respect to the first substrate 101, the parameters of the optical structure layer 104 can be matched only by adaptively adjusting the voltage applied to the second electrodes at the corresponding positions according to the parameters of the optical structure layer 104, such as the actual position, the inclination angle, the width, and the like, so that the requirement of accurately matching the size change of the voltage with the thickness change of the actual electro-optic material 106 is met, and the requirement of bonding accuracy is reduced.

It will be appreciated that the greater the number of second electrodes per lens, the more fine the control of the different thicknesses of electro-optic material 106. Considering the process precision and the production cost of the light modulation module, the number of the second 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 driving voltage required, and thus the voltage applied to each second electrode is positively correlated to the thickness of the electro-optic material 106 below that second electrode.

Alternatively, for ease of fabrication, the second electrode may be an independently addressable TFT cell. 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 view illustrating a light modulation module according to an embodiment of the present disclosure. 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 structure layer 104, and can still enable electro-optic materials with different thicknesses to work under proper conditions (i.e. the electro-optic material can stand completely without causing overdrive) by applying different voltages to the independently addressable electrodes (i.e. the second electrodes). Meanwhile, the discrete independently addressable electrodes can be manufactured in a manufacturing process without being limited by the requirement on the bonding precision, and the manufacturing method is convenient for mass production.

In a third possible implementation manner, fig. 10 illustrates a schematic cross-sectional structure of yet another light modulation module provided in the 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 close to 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 drive layer 103 and the second drive 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-shaped structure (that is, the first electrodes are discrete independently addressable electrodes); the second driving layer 105 includes a plurality of second electrodes, and an orthographic projection of the plurality of second electrodes on the plane where the light modulation module is located is in a discrete island-like 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 a transparent conductive material such as ITO.

In an embodiment, an orthographic projection of the first driving layer 103 on the plane of the light modulation module may be completely overlapped with an orthographic projection of the second driving layer 105 on the plane of the light modulation module (that is, 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 orthographic projection of the first driving layer 103 on the plane where the light modulation module is located can be completely overlapped with the orthographic projection of the second driving layer 105 on the plane where the light modulation module is located, the first driving layer 103 and the second driving layer 105 can share one mask plate during manufacturing, and 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. A first alignment layer 107 is disposed between the first drive layer 103 and the electro-optic material 106 and in direct contact with the electro-optic material 106; a second alignment layer 108 is arranged between the second drive layer 105 and the electro-optic material 106 and 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 arranged in sequence (the lenses are drawn by taking the lenses as cylindrical lenses as an example in fig. 10). As shown in fig. 10, each lenticular lens has a different thickness of the electro-optic material 106 due to its shape, and thus, the number of the first electrodes corresponding to each lenticular lens is multiple, and the number of the second electrodes corresponding to each lenticular lens is multiple. Thus, by adjusting the voltages applied to the first and second electrodes, the electro-optic material 106 with different thicknesses can be operated under appropriate conditions (i.e., the electro-optic material 106 can be fully stood without causing overdrive). Meanwhile, because the first electrode and the second electrode are discrete independently addressable electrodes, no matter whether the optical structure layer 104 has an inclination angle or an inclination angle with respect to the first substrate 101, the voltage applied to the first electrode and the second electrode at the corresponding positions can be adaptively adjusted according to the actual position, the inclination angle, the width and other parameters of the optical structure layer 104, so that the parameters of the optical structure layer 104 can be matched, the requirement that the size change of the voltage is accurately matched with the thickness change of the actual electro-optical material 106 is met, and the requirement of the attaching accuracy is reduced.

In one embodiment, the thicker the thickness of the electro-optic material 106, the greater the driving voltage required, and thus, the voltage applied to each first electrode is positively correlated to the thickness of the electro-optic material 106 above the first electrode; the voltage applied to each second electrode is positively correlated to the thickness of the electro-optic material 106 beneath that second electrode.

Alternatively, for ease of fabrication, the first and second electrodes may be independently addressable TFT cells. The plurality of 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 illustrating a further optical modulation module according to an embodiment of the present disclosure. 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 structure layer 104, and can still enable electro-optic materials with different thicknesses to work under proper conditions (i.e., the electro-optic material can stand completely without causing 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 manufactured in a manufacturing process without being limited by the requirement on the bonding precision, and the manufacturing method is convenient for mass production.

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

The embodiment of the application provides an optical 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 close to the second substrate; the second driving layer is arranged on one side, close to the first substrate, of the second substrate; an electro-optic material disposed between the first and second drive layers; 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-shaped structure. The first and/or second drive layers are designed such that they are no longer full-area electrodes but rather are discrete, independently addressable electrodes. Different voltages are applied to the independently addressable electrodes, the voltages applied to the electro-optical materials with different thicknesses are adjusted, the electro-optical materials are guaranteed to work under appropriate conditions (namely, the electro-optical materials can stand completely and cannot be overdriven), the service life of the electro-optical materials is prolonged, the power consumption of the light modulation module is reduced, and the optical effect of the light modulation module is improved. Meanwhile, the first driving layer and/or the second driving layer are/is discrete electrodes capable of being independently addressed, so that the requirement on the bonding precision is not limited in the manufacturing process, and the mass production is facilitated.

Fig. 12 is a schematic structural diagram illustrating a switchable stereoscopic display device according to an embodiment of the present disclosure. 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 according to any of the embodiments described above.

The display module 202 is connected with the control system 201, and the display module 202 is configured 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 the 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 (LCD), a Light Emitting Diode (LED) Display device, an Organic Light-Emitting Diode (OLED) Display device, electronic paper, a Quantum Dot Light Emitting Diode (QLED) Display device, a micro LED Display device, a micro OLED Display device, a projection module, and other Display devices, which is not limited in the present application.

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

Claims

1. An optical modulation module comprising: the first substrate and the second substrate are oppositely arranged; the first driving layer and the optical structure layer are arranged on one side, close to the second substrate, of the first substrate; the second driving layer is arranged on one side, close to the first substrate, of the second substrate; an electro-optic material disposed between the first and second drive layers; wherein the content of the first and second substances,

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

2. The light modulation module of claim 1,

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 where the light modulation module is located is superposed with the orthographic projection of the first substrate on the plane where the light modulation module is located; alternatively, the first and second liquid crystal display panels may be,

the first driving layer comprises a first electrode, and the orthographic projection of the first electrode on the plane of the light modulation module is superposed 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; alternatively, the first and second electrodes may be,

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

3. The light modulation module of claim 1,

the first driving layer is arranged between the optical structure layer and the first substrate; alternatively, the first and second electrodes may be,

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

4. The light modulation module of claim 1, further comprising: a first alignment layer and a second alignment layer; wherein, the first and the second end of the pipe are connected with each other,

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

5. The light modulating module of claim 1 wherein the island structures are shaped in any one or combination of circles, ovals, triangles, quadrilaterals, polygons.

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

when the orthographic projection of the first driving layer on the plane where the light modulation module is located is of a discrete island-shaped structure, the first driving layer comprises a plurality of first electrodes, and the number of the first electrodes corresponding to each lens is multiple.

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 electrode.

8. The light modulation module of claim 6, wherein each first electrode is an independently addressable Thin Film Transistor (TFT) cell.

9. The light modulation module of claim 6, wherein the 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 sequentially arranged lenses;

when the orthographic projection of the second driving layer on the plane where the light modulation module is located is of a discrete island-shaped structure, the second driving layer comprises a plurality of second electrodes, and the number of the second electrodes corresponding to each lens is multiple.

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 of claim 6 or 10, wherein each of the lenses is a lenticular lens.

15. The light modulating 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 according to any of claims 1-15; wherein the content of the first and second substances,

light modulation module with control system connects, and sets up display module group sends one side of image light, light modulation module sets up to be in under control system's control, right image light modulates, forms plane image or stereogram.