An optical modulation module and a switchable stereoscopic display device

Abstract

The present application discloses an optical 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; a first driving layer and an optical structure layer disposed on a side of the first substrate close to the second substrate; a second driving layer disposed on a side of the second substrate close to the first substrate; an electro-optic material disposed between the first driving layer and the second driving layer; wherein, the orthographic projection of at least one of the first driving layer and the second driving layer on the plane where the optical modulation module is located is strip-shaped.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technologies, for example, to a light modulation module and a switchable stereoscopic display device. Background Art

[0002] With the development of display technologies, switchable stereoscopic display devices have also begun to gain wide attention from users. A switchable stereoscopic display device generally includes a control system, a display module, and a light modulation module. Among them, the light modulation module can modulate the image light emitted by the display module through its switching state under the control of the control system, so as to realize the free switching between two-dimensional (2D) and three-dimensional (3D) of the display device.

[0003] The light modulation module generally includes a lens substrate, a lens electrode, a lens structure, liquid crystal, a spacer electrode, and a spacer substrate that are sequentially stacked. Due to the existence of the lens structure, the thickness of the liquid crystal is different in each region, so the required theoretical driving voltage is different. However, in the related art, both the lens electrode and the spacer electrode are full-surface electrodes, and the electric field intensity at each point inside them is the same. This will cause the liquid crystal in some regions to be fully standing, while in some regions it is not fully standing, resulting in a deviation in the refractive index that the light feels in this region and affecting the optical effect; or causing the liquid crystal in some regions to exceed its saturation voltage (also known as over-driving), resulting in a reduction in the lifespan of the liquid crystal and an increase in the power consumption of the light modulation module. Summary of the Invention

[0004] The present application provides a light modulation module and a switchable stereoscopic display device, which can adjust the voltage received by electro-optical materials with different thicknesses, ensure that the electro-optical materials work under suitable conditions, thereby extending the lifespan of the electro-optical materials, reducing the power consumption of the light modulation module, and improving the optical effect of the light modulation module.

[0005] In a first aspect, an embodiment of the present application provides a light modulation module, including: a first substrate and a second substrate that are oppositely arranged; a first driving layer and an optical structure layer arranged on one side of the first substrate close to the second substrate; a second driving layer arranged on one side of the second substrate close to the first substrate; an electro-optical material arranged between the first driving layer and the second driving layer; wherein,

[0006] The positive 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 strip-shaped.

[0007] 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 having the structure as described in the first aspect; wherein,

[0008] The display module is connected to the control system, and the display module is configured to emit image light under the control of the control system;

[0009] The light modulation module is connected to the control system and is disposed on one side where the display module emits image light. The light modulation module is configured to modulate the image light under the control of the control system to form a planar image or a stereoscopic image. Description of the Drawings

[0010] Figure 1 is a schematic cross-sectional structure diagram of a light modulation module in the related art when no voltage is applied;

[0011] Figure 2 is a schematic cross-sectional structure diagram of a light modulation module in the related art when a voltage is applied;

[0012] Figure 3 is a schematic cross-sectional structure diagram of a light modulation module provided by an embodiment of the present application;

[0013] Figure 4 is provided by an embodiment of the present application Figure 3 a partial enlarged schematic diagram of the optical structure layer and the first driving layer shown in;

[0014] Figure 5 is a schematic three-dimensional structure diagram of a light modulation module provided by an embodiment of the present application;

[0015] Figure 6 is a schematic cross-sectional structure diagram of another light modulation module provided by an embodiment of the present application;

[0016] Figure 7 is a schematic cross-sectional structure diagram of yet another light modulation module provided by an embodiment of the present application;

[0017] Figure 8 is a schematic cross-sectional structure diagram of still another light modulation module provided by an embodiment of the present application;

[0018] Figure 9 is a schematic cross-sectional structure diagram of still yet another light modulation module provided by an embodiment of the present application;

[0019] Figure 10 is a schematic cross-sectional structure diagram of yet another different light modulation module provided by an embodiment of the present application;

[0020] Figure 11 is a schematic cross-sectional structure diagram of yet another further light modulation module provided by an embodiment of the present application;

[0021] Figure 12 is a schematic structure diagram of a switchable stereoscopic display device provided by an embodiment of the present application. Detailed Description of the Invention

[0022] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] Meanwhile, the descriptions of the accompanying drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the specification denote the same elements. Additionally, for the sake of understanding and ease of description, the thicknesses of some layers, films, panels, regions, etc. may be exaggerated in the accompanying drawings. At the same time, it can be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element can be directly on the other element or there can also be intermediate elements. Additionally, "on" means positioning an element on or below another element, but essentially does not mean positioning on the upper side of another element according to the direction of gravity. For the sake of convenience in understanding, in the accompanying drawings of the present application, the elements are all drawn on the upper side of another element.

[0024] In addition, unless explicitly described to the contrary, the word "comprising" and variations such as "including" or "having" will be understood to imply the inclusion of the element, but not to exclude any other elements.

[0025] It should also be noted that "and / or" mentioned in the embodiments of the present application refers to any and all combinations including one or more of the related listed items. In the embodiments of the present application, "first", "second", "third", etc. are used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. And, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are also intended to include the plural forms.

[0026] When a certain embodiment can be implemented differently, the process sequence can be executed differently from the described sequence. For example, two consecutively described processes can be executed substantially at the same time or in the reverse order of the described sequence.

[0027] Stereoscopic display is an implementation method of virtual reality. Its principle is to utilize the difference between the image information seen by the viewer's left eye and the image information seen by the right eye, so that the binocular parallax of the viewer is fused to generate a stereoscopic effect. The common stereoscopic display technology uses 3D glasses to achieve the transmission of the left and right eye images to the viewer's left and right eyes respectively; the naked-eye stereoscopic display technology gets rid of the bondage of 3D glasses and improves the comfort of the viewer, becoming the future development direction and goal.

[0028] In the naked-eye stereoscopic display technology, a switchable stereoscopic display device generally includes a control system, a display module, and a light modulation module. Among them, the light modulation module can, under the control of the control system, modulate the image light emitted by the display module through its on / off state to achieve the free switching between 2D / 3D of the display device. Figure 1The schematic cross-sectional structure diagram of an optical modulation module in the related art when no voltage is applied is shown. Figure 2 The schematic cross-sectional structure diagram of an optical modulation module in the related art when a voltage is applied is shown. The optical modulation module includes a lens substrate 1, a lens electrode 2, a lens structure 3, a liquid crystal 4, a spacer electrode 5, and a spacer substrate 6 which are stacked in sequence. As Figure 1 shown, 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 Figure 2 shown, when a voltage is applied between the lens electrode 2 and the spacer electrode 5, the liquid crystal 4 is in a standing state. Thus, the optical modulation module can form an optical modulator to modulate the image light emitted by the display module, realizing the free switching between 2D / 3D of the display device.

[0029] Due to the existence of the lens structure 3, the thickness of the liquid crystal in different regions is different, so the required theoretical driving voltage is different. However, as Figure 1 and Figure 2 shown, both the lens electrode 2 and the spacer electrode 5 are full-surface electrodes, and the electric field intensity at each point inside them is the same. This will cause the liquid crystal in some regions to be completely standing, while in some regions it is not completely standing, resulting in a deviation in the refractive index that the light feels in this region and affecting the optical effect; or causing the liquid crystal in some regions to exceed its saturation voltage (also known as over-driving), resulting in a reduction in the life of the liquid crystal and an increase in the power consumption of the optical modulation module. To solve the above problems, the embodiments of the present application provide an optical modulation module and a switchable stereoscopic display device, which can adjust the voltage received by the electro-optical materials with different thicknesses, ensure that the electro-optical materials work under suitable conditions, thereby extending the 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.

[0030] Next, the optical modulation module, the switchable stereoscopic display device, and their technical effects will be described in detail.

[0031] The embodiments of the present application provide an optical modulation module, including: a first substrate and a second substrate arranged oppositely; a first driving layer and an optical structure layer arranged on one side of the first substrate close to the second substrate; a second driving layer arranged on one side of the second substrate close to the first substrate; and an electro-optical material arranged between the first driving layer and the second driving layer.

[0032] Among them, the first driving layer and the second driving layer can adopt any one of the following three designs:

[0033] Design 1: The positive projection of the first driving layer on the plane where the optical modulation module is located is strip-shaped, and the positive projection of the second driving layer on the plane where the optical modulation module is located coincides with the positive projection of the first substrate on the plane where the optical modulation module is located.

[0034] Design 2: The orthographic projection of the first driving layer on the plane where the optical modulation module is located coincides with the orthographic projection of the first substrate on the plane where the optical modulation module is located, and the orthographic projection of the second driving layer on the plane where the optical modulation module is located is strip-shaped.

[0035] Design 3: The orthographic projections of both the first driving layer and the second driving layer on the plane where the optical modulation module is located are strip-shaped.

[0036] Through the above three designs, by designing the first driving layer and / or the second driving layer, the first driving layer and / or the second driving layer are no longer a whole-surface electrode but a strip-shaped electrode. By adjusting the voltage applied to the strip-shaped electrode, electro-optic materials with different thicknesses can work under suitable conditions (that is, the electro-optic materials can stand completely and will not cause over-driving). For the convenience of understanding, the above three designs will be described in detail below with reference to the accompanying drawings.

[0037] In the first possible implementation manner, Figure 3 Fig. shows a schematic cross-sectional structure diagram of an optical modulation module provided by an embodiment of the present application. As Figure 3 shown, the optical modulation module includes: a first substrate 101 and a second substrate 102 arranged oppositely; a first driving layer 103 and an optical structure layer 104 arranged on one side of the first substrate 101 close to the second substrate 102; a second driving layer 105 arranged on one side of the second substrate 102 close to the first substrate 101; and an electro-optic material 106 arranged between the first driving layer 103 and the second driving layer 105.

[0038] Optionally, the first substrate 101 may be a lens substrate, and the second substrate 102 may be a spacer substrate; or, 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 usually made of transparent materials such as glass and resin.

[0039] The first driving layer 103 is arranged between the optical structure layer 104 and the first substrate 101. The first driving layer 103 includes a plurality of first electrodes, and the orthographic projection of each first electrode on the plane where the optical modulation module is located is strip-shaped (that is, the first electrode is a strip-shaped electrode); the second driving layer 105 includes a second electrode, and the orthographic projection of the second electrode on the plane where the optical modulation module is located coincides with the orthographic projection of the first substrate 101 on the plane where the optical modulation module is located (that is, the second electrode is a planar electrode). The first driving layer 103 and the second driving layer 105 are usually made of transparent conductive materials such as indium tin oxide (ITO).

[0040] Continue to refer to Figure 3, in one embodiment, the optical 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 materials such as polyimide.

[0041] The optical structure layer 104 includes a plurality of lenses arranged in sequence ( Figure 3 illustrated with the lenses being cylindrical lenses). As Figure 3 shown, due to the limitation of its own shape, each cylindrical lens will cause the thickness of the electro-optic material 106 above it to be different. Therefore, the number of first electrodes corresponding to each lens is at least two. In this way, by adjusting the voltage applied to the first electrodes, the electro-optic material 106 with different thicknesses can work under suitable conditions (that is, the electro-optic material 106 can stand completely and will not cause over-driving).

[0042] It can be understood that the more the number of first electrodes corresponding to each lens, the finer the control of the electro-optic material 106 with different thicknesses. Considering the process accuracy and production cost of the optical modulation module, the number of first electrodes corresponding to each lens can be designed according to actual needs.

[0043] In one embodiment, the thicker the thickness of the electro-optic material 106, the greater the driving voltage it requires. Therefore, the voltage applied to each first electrode is positively correlated with the thickness of the electro-optic material 106 above the first electrode.

[0044] To ensure that the electro-optic material 106 corresponding to the area between any two adjacent first electrodes can work properly, the distance between any two adjacent first electrodes should not be too large. Figure 4 shows a partial enlarged schematic diagram of the optical structure layer and the first driving layer provided by the embodiment of the present application. As Figure 3 shown, when the widths a of a plurality of first electrodes are equal, the distance b between any two adjacent first electrodes is less than or equal to the width a of the first electrode. Figure 4

[0045] Figure 5 Figure 5 shows a three-dimensional structure schematic diagram of an optical modulation module provided by the embodiment of the present application. As shown, since only one voltage can be applied to one first electrode, it is necessary to ensure that the thickness of the electro-optic material 106 in the extending direction of one first electrode is the same, that is, the extending direction of the first electrode is parallel to the extending direction of the lens.

[0046] Figure 3 Continue to refer to Figure 3 andFigure 4 When the lens is a cylindrical lens, the cylindrical lens has a centrosymmetric structure. Therefore, the thickness of the electro-optic material 106 above the cylindrical lens is also in a centrosymmetric state. The optical modulation module has at least one of the following characteristics:

[0047] The first electrode corresponding to each cylindrical lens is centrosymmetric along the central axis of the cylindrical lens;

[0048] The voltage applied to the first electrode corresponding to each cylindrical lens is centrosymmetric along the central axis of the cylindrical lens.

[0049] Figure 6 FIG. shows a schematic cross-sectional structure diagram of another optical modulation module provided by an embodiment of the present application. Different from the optical modulation module shown above Figure 3 The optical structure layer 104 includes a plurality of lenses arranged in sequence, and the lens is a prism. Referring to Figure 6 It can be seen that within the region corresponding to each lens, along Figure 6 the thickness of the electro-optic material 106 gradually decreases in the direction from left to right. Therefore, the voltage applied to the first electrode corresponding to each lens Figure 6 also gradually decreases in the direction from left to right.

[0050] Figure 7 FIG. shows a schematic cross-sectional structure diagram of yet another optical modulation module provided by an embodiment of the present application. Different from the optical modulation module shown above Figure 3 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. Still, by adjusting the voltage applied to the strip electrode, the effect of enabling electro-optic materials with different thicknesses to work under suitable conditions (that is, the electro-optic material can stand completely and will not cause over-driving) can be achieved.

[0051] In a second possible implementation manner, Figure 8 FIG. shows a schematic cross-sectional structure diagram of still another optical modulation module provided by an embodiment of the present application. As Figure 8 shown, 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 one side of the first substrate 101 close to the second substrate 102; a second driving layer 105 disposed on one side of the second substrate 102 close to the first substrate 101; and an electro-optic material 106 disposed between the first driving layer 103 and the second driving layer 105.

[0052] Optionally, the first substrate 101 may be a lens substrate, and the second substrate 102 may be a spacer substrate; or, 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.

[0053] 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 the orthographic projection of the first electrode on the plane where the optical modulation module is located coincides with the orthographic projection of the first substrate 101 on the plane where the optical modulation module is located (i.e., the first electrode is a planar electrode); the second driving layer 105 includes a plurality of second electrodes, and the orthographic projection of each second electrode on the plane where the optical modulation module is located is strip-shaped (i.e., the second electrode is a strip-shaped electrode). The first driving layer 103 and the second driving layer 105 can generally be made of a transparent conductive material such as ITO.

[0054] Continue to refer to Figure 8 , in an embodiment, the optical 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 can be made of a material such as polyimide.

[0055] The optical structure layer 104 includes a plurality of lenses arranged in sequence ( Figure 8 in which the lens is drawn as a cylindrical lens as an example). As Figure 8 shown, due to the limitation of its own shape, each cylindrical lens will cause the thickness of the electro-optic material 106 above it to be different. Therefore, the number of second electrodes corresponding to each lens is at least two. In this way, by adjusting the voltage applied to the second electrode, the electro-optic material 106 with different thicknesses can work under suitable conditions (i.e., the electro-optic material 106 can stand completely and will not cause over-driving).

[0056] It can be understood that the more the number of second electrodes corresponding to each lens, the finer the control of the electro-optic material 106 with different thicknesses. Considering the process accuracy and production cost of the optical modulation module, the number of second electrodes corresponding to each lens can be designed according to actual needs.

[0057] In an embodiment, the thicker the thickness of the electro-optic material 106, the greater the driving voltage it requires. Therefore, the voltage applied to each second electrode is positively correlated with the thickness of the electro-optic material 106 below the second electrode.

[0058] To ensure that the electro-optic material 106 corresponding to the region between any two adjacent second electrodes can work properly, the distance between any two adjacent second electrodes should not be too large. Exemplarily, when the widths of the plurality of second electrodes are equal, the distance between any two adjacent second electrodes is less than or equal to the width of the second electrode.

[0059] In addition, since only one voltage can be applied to one second electrode, it is necessary to ensure that the thickness of the electro-optic material 106 in the extending direction of one second electrode is the same, that is, the extending direction of the second electrode is parallel to the extending direction of the lens.

[0060] Continue to refer to Figure 8 , when the lens is a cylindrical lens, the cylindrical lens has a centrosymmetric structure, so the thickness of the electro-optic material 106 above the cylindrical lens is also in a centrosymmetric state. The optical modulation module has at least one of the following characteristics:

[0061] The second electrode corresponding to each cylindrical lens is centrosymmetric along the central axis of the cylindrical lens;

[0062] The voltage applied to the second electrode corresponding to each cylindrical lens is centrosymmetric along the central axis of the cylindrical lens.

[0063] Figure 9 Fig. shows a schematic cross-sectional structure diagram of still another optical modulation module provided by an embodiment of the present application. Different from the optical modulation module shown above Figure 8 , 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 adjust the voltage applied to the strip-shaped electrode to achieve the effect of making electro-optic materials with different thicknesses work under suitable conditions (that is, the electro-optic material can stand completely and will not cause over-driving).

[0064] In a third possible implementation manner, Figure 10 Fig. shows a schematic cross-sectional structure diagram of yet another optical modulation module provided by an embodiment of the present application. As shown in Figure 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; and an electro-optic material 106 disposed between the first driving layer 103 and the second driving layer 105.

[0065] Optionally, the first substrate 101 may be a lens substrate, and the second substrate 102 may be a spacer substrate; or, 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.

[0066] 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 the orthographic projection of each first electrode on the plane where the optical modulation module is located is strip-shaped (i.e., the first electrode is a strip-shaped electrode); the second driving layer 105 includes a plurality of second electrodes, and the orthographic projection of each second electrode on the plane where the optical modulation module is located is strip-shaped (i.e., the second electrode is also a strip-shaped electrode). The first driving layer 103 and the second driving layer 105 can generally be made of a transparent conductive material such as ITO.

[0067] In one embodiment, the orthographic projection of the first driving layer 103 on the plane where the optical modulation module is located may completely coincide with the orthographic projection of the second driving layer 105 on the plane where the optical modulation module is located (i.e., each first electrode corresponds to a second electrode, the first electrode and the second electrode are of the same size and are completely aligned), or may not completely coincide. When the orthographic projection of the first driving layer 103 on the plane where the optical modulation module is located can completely coincide with the orthographic projection of the second driving layer 105 on the plane where the optical modulation module is located, the first driving layer 103 and the second driving layer 105 can share a mask plate during manufacturing, reducing the process difficulty.

[0068] Continue to refer to Figure 10 , in one embodiment, the optical 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 can be made of a material such as polyimide.

[0069] The optical structure layer 104 includes a plurality of lenses arranged in sequence ( Figure 10 In the figure, the lens is drawn as a cylindrical lens for example). As Figure 10 shown, due to the limitation of its own shape, each cylindrical lens will cause the thickness of the electro-optic material 106 above it to be different. Therefore, the number of first electrodes corresponding to each lens is at least two, and the number of second electrodes corresponding to each lens is at least two. In this way, by adjusting the voltages applied to the first electrode and the second electrode, the electro-optic material 106 with different thicknesses can work under suitable conditions (i.e., the electro-optic material 106 can stand completely without causing over-driving).

[0070] In one embodiment, the thicker the thickness of the electro-optic material 106, the greater the driving voltage it requires. Therefore, the voltage applied to each first electrode is positively correlated with the thickness of the electro-optic material 106 above the first electrode; the voltage applied to each second electrode is positively correlated with the thickness of the electro-optic material 106 below the second electrode.

[0071] In one embodiment, when the widths of the plurality of first electrodes are equal, the distance between any two adjacent first electrodes is less than or equal to the width of the first electrode; when the widths of the plurality of second electrodes are equal, the distance between any two adjacent second electrodes is less than or equal to the width of the second electrode.

[0072] In one embodiment, the extending direction of the first electrode is parallel to the extending direction of the lens; the extending direction of the second electrode is parallel to the extending direction of the lens.

[0073] In one embodiment, the lens is a cylindrical lens, and the light modulation module has at least one of the following features:

[0074] The first electrodes corresponding to each cylindrical lens are centrosymmetric about the central axis of the cylindrical lens;

[0075] The voltages applied to the first electrodes corresponding to each cylindrical lens are centrosymmetric about the central axis of the cylindrical lens;

[0076] The second electrodes corresponding to each cylindrical lens are centrosymmetric about the central axis of the cylindrical lens;

[0077] The voltages applied to the second electrodes corresponding to each cylindrical lens are centrosymmetric about the central axis of the cylindrical lens.

[0078] Figure 11 Fig. shows a schematic cross-sectional structure diagram of yet another light modulation module provided by an embodiment of the present application. Different from the light modulation module shown above Figure 10 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 adjust the voltage applied to the strip electrodes to achieve the effect of making electro-optic materials with different thicknesses work under suitable conditions (that is, the electro-optic materials can stand completely and will not cause over-driving).

[0079] In the above embodiments of the present application, the electro-optic material 106 can generally be liquid crystal; the material of the optical structure layer 104 can generally be transparent resin or glass.

[0080] An embodiment of the present application provides an optical modulation module, which includes a first substrate and a second substrate arranged opposite to each other; a first driving layer and an optical structure layer provided on one side of the first substrate close to the second substrate; a second driving layer provided on one side of the second substrate close to the first substrate; and an electro-optic material provided between the first driving layer and the second driving layer. Wherein, the orthographic projection of the first driving layer and / or the second driving layer on the plane where the optical modulation module is located is strip-shaped. By designing the first driving layer and / or the second driving layer, the first driving layer and / or the second driving layer is no longer a whole-surface electrode but a strip-shaped electrode. By applying different voltages to the strip-shaped electrodes, the voltages received by electro-optic materials with different thicknesses are adjusted to ensure that the electro-optic materials work under suitable conditions (that is, the electro-optic materials can stand completely and will not cause over-driving), thereby prolonging the service life of the electro-optic materials, reducing the power consumption of the optical modulation module, and improving the optical effect of the optical modulation module.

[0081] Figure 12 The structural schematic diagram of a switchable stereoscopic display device provided by an embodiment of the present application is shown. As Figure 12 shown, the switchable stereoscopic display device includes: a control system 201, a display module 202, and the optical modulation module 203 described in any of the above embodiments.

[0082] The display module 202 is connected to the control system 201, and the display module 202 is configured to emit image light under the control of the control system 201;

[0083] The optical modulation module 203 is connected to the control system 201 and is arranged on the side where the display module 202 emits image light. The optical 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.

[0084] In an embodiment, the display module 202 may be any one of display devices such as a liquid crystal display (LCD), a light emitting diode (LED) display device, an organic light-emitting diode (OLED) display device, an electronic paper, a QLED (quantum dot light emitting diodes) display device, a micro LED (micro light emitting diode, μLED) display device, a micro OLED display device, a projection module, etc. The present application is not limited thereto.

[0085] The solution provided by this application can be applied to optical devices with switchable naked-eye 3D, can also be used in switchable anti-peeping devices, and can also be used in other switchable optical modulation devices using liquid crystals. The embodiments of this application do not limit this.

Claims

1. A light modulation module, comprising: A first substrate and a second substrate which are disposed opposite to each other; A first driving layer and an optical structure layer disposed on one side of the first substrate close to the second substrate; A second driving layer disposed on one side of the second substrate close to the first substrate; An electro-optic material disposed between the first driving layer and the second driving layer; wherein at least one of the first driving layer and the second driving layer has a strip-shaped orthographic projection on the plane where the optical modulation module is located; The optical structure layer includes a plurality of lenses arranged in sequence; When the orthographic projection of the first driving layer on the plane where the optical modulation module is located is strip-shaped, the first driving layer includes a plurality of first electrodes, and the number of the first electrodes corresponding to each lens is at least two; wherein the voltage applied to the first electrode is positively correlated with the thickness of the electro-optic material above the first electrode; When the orthographic projection of the second driving layer on the plane where the optical modulation module is located is strip-shaped, the second driving layer includes a plurality of second electrodes, and the number of the second electrodes corresponding to each lens is at least two; wherein the voltage applied to each second electrode is positively correlated with the thickness of the electro-optic material below the second electrode.

2. The optical modulation module according to claim 1, wherein, The first driving layer includes a plurality of first electrodes, and the orthographic projection of each first electrode on the plane where the optical modulation module is located is strip-shaped; the second driving layer includes a second electrode, and the orthographic projection of the second electrode on the plane where the optical modulation module is located coincides with the orthographic projection of the first substrate on the plane where the optical modulation module is located; Or, The first driving layer includes a first electrode, and the orthographic projection of the first electrode on the plane where the optical modulation module is located coincides with the orthographic projection of the first substrate on the plane where the optical modulation module is located; The second driving layer includes a plurality of second electrodes, and the orthographic projection of each second electrode on the plane where the optical modulation module is located is strip-shaped; or, The first driving layer includes a plurality of first electrodes, and the second driving layer includes a plurality of second electrodes; the orthographic projection of each first electrode and each second electrode on the plane where the optical modulation module is located is strip-shaped, and the orthographic projection of the first driving layer on the plane where the optical modulation module is located completely coincides with the orthographic projection of the second driving layer on the plane where the optical modulation module is located.

3. The optical modulation module according to claim 1, wherein, The first driving layer is disposed 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.

4. The optical modulation module according to claim 1 further comprises: A first alignment layer and a second alignment layer; wherein, The first alignment layer is disposed 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.

5. The optical modulation module according to claim 1, wherein, When the orthographic projection of the first driving layer on the plane where the optical modulation module is located is strip-shaped, the first driving layer includes a plurality of first electrodes, and when the widths of the plurality of first electrodes are equal, the distance between any two adjacent first electrodes is less than or equal to the width of the first electrode.

6. The optical modulation module according to claim 1, wherein, The extending direction of each first electrode is parallel to the extending direction of each lens.

7. The optical modulation module according to claim 1, wherein, The plurality of lenses are cylindrical lenses, and the optical modulation module has at least one of the following characteristics: The first electrodes corresponding to each cylindrical lens are centrosymmetric along the central axis of the cylindrical lens; The voltages applied to the first electrodes corresponding to each cylindrical lens are centrosymmetric along the central axis of the cylindrical lens.

8. The optical modulation module according to claim 1, wherein, When the orthographic projection of the second driving layer on the plane where the optical modulation module is located is strip-shaped, the second driving layer includes a plurality of second electrodes, and when the widths of the plurality of second electrodes are equal, the distance between any two adjacent second electrodes is less than or equal to the width of the second electrode.

9. The optical modulation module according to claim 1, wherein, The extending direction of each second electrode is parallel to the extending direction of each lens.

10. The optical modulation module according to claim 1, wherein, The plurality of lenses are cylindrical lenses, and the optical modulation module has at least one of the following characteristics: The second electrodes corresponding to each cylindrical lens are centrosymmetric along the central axis of the cylindrical lens; The voltages applied to the second electrodes corresponding to each cylindrical lens are centrosymmetric along the central axis of the cylindrical lens.

11. The optical modulation module according to claim 1, wherein, The electro-optical material is liquid crystal.

12. A switchable stereoscopic display device, comprising: A control system, a display module, and an optical modulation module according to any one of claims 1-11; wherein, The display module is connected to the control system, and the display module is configured to emit image light under the control of the control system; The optical modulation module is connected to the control system and is disposed on the side where the display module emits the image light. The optical modulation module is configured to modulate the image light under the control of the control system to form a planar image or a stereoscopic image.

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