An optical waveguide, a control method of the optical waveguide, an optical module, and a display device

Abstract

The application discloses an optical waveguide, a control method of the optical waveguide, an optical module and a display device. The optical waveguide comprises at least two substrate layer structures, the at least two substrate layer structures are stacked one above another, and gaps exist between the at least two layer structures; at least two electrode film layers are arranged on surfaces of the two layer structures respectively; and a driving power supply device is electrically connected with the two electrode film layers respectively to output the same charge or different charges to the two electrode film layers. In the application, the electrode film layers are arranged on the surfaces of the two layer structures, and the driving power supply device outputs the same charge and different charges to the two electrode film layers, so that repulsion and attraction are generated between the two electrode film layers, the deformation trend of the two layer structures is counteracted, the deformation of the two layer structures generated under the influence of the environment is reduced or even avoided, and the optical performance of the optical waveguide is prevented from being reduced.

Description

Technical Field

[0001] This invention relates to the field of display device technology, and in particular to an optical waveguide, a control method for the optical waveguide, an optical module, and a display device. Background Technology

[0002] In the fields of augmented reality (AR) and mixed reality (MR), compared with display solutions such as Bird Bath (BB, semi-reflective), insect eye (off-axis reflective), and freeform prism, the optical waveguide solution is thinner and lighter and has a larger eye box, thus having a broader application prospect.

[0003] Existing optical waveguide technology requires a protective layer structure 100 to prevent the microstructure 200 (surface relief grating, holographic grating, or metasurface) from direct contact with air. An air gap is required between the protective layer structure 100 and the substrate structure 300; otherwise, the microstructure 200 will be damaged. Figure 1 This is a schematic cross-sectional view of an existing optical waveguide under normal temperature and pressure conditions; under low temperature and low pressure environments, both the protective layer structure 100 and the substrate structure 300 undergo concave deformation (e.g., Figure 2 (As shown); Under certain special environments, the protective layer structure and the base layer structure may also bulge outwards; Regardless of whether the layer structure is concave or convex, as long as the layer structure deforms, it will cause a decrease in the optical performance of the optical waveguide.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an optical waveguide, an optical waveguide control method, an optical module and a display device, in view of the above-mentioned defects of the prior art, so as to solve the technical problem that the optical performance of the optical waveguide is reduced due to the deformation of the protective layer structure and the substrate structure caused by environmental changes.

[0006] The technical solution adopted by this invention to solve the technical problem is as follows:

[0007] An optical waveguide comprising:

[0008] At least two base layer structures; the at least two base layer structures are stacked one on top of the other, and there is a gap between the at least two layer structures;

[0009] At least two electrode film layers are respectively disposed on the surfaces of two layer structures;

[0010] The driving power supply device is electrically connected to the two electrode films respectively, so as to output the same type of charge and the opposite type of charge to the two electrode films.

[0011] The optical waveguide wherein the electrode film is made of ITO.

[0012] The optical waveguide wherein the electrode film layer covers all or part of the surface of the layer structure.

[0013] The optical waveguide further includes:

[0014] Microstructures are disposed within the gaps and located on at least one base layer structure;

[0015] When the electrode film covers a portion of the surface of the layer structure, the electrode film corresponds to the microstructure.

[0016] The optical waveguide, wherein the electrode film layer includes at least one electrode film body; when there are multiple electrode film bodies, there is a gap between two adjacent electrode film bodies.

[0017] The optical waveguide wherein the electrode film body is an annular electrode film body; when there are multiple electrode film bodies, the multiple electrode film bodies are arranged concentrically, and the thickness of the multiple electrode film bodies gradually changes along the direction from the edge to the center, or the amount of charge applied gradually changes along the direction from the edge to the center.

[0018] The optical waveguide, wherein the electrode film layer comprises:

[0019] Multiple source lines are connected in parallel to the drive power supply device;

[0020] Multiple gate lines are connected in parallel to the driving power supply device; multiple source lines and multiple gate lines are arranged in a one-to-one overlapping manner to divide the surface of the layer structure into multiple charge control regions arranged in an array.

[0021] Multiple pixel driving electrodes are arranged in an array, and each charge control region has a corresponding pixel driving electrode; the pixel driving electrodes are electrically connected to the corresponding source line and gate line respectively.

[0022] The optical waveguide further includes:

[0023] A heating device is disposed on the base layer structure.

[0024] A control method based on an optical waveguide as described in any one of the above, comprising:

[0025] Obtain the current external pressure and current external temperature;

[0026] When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the two electrode films are charged with the same type of charge.

[0027] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, opposite charges are applied to the two electrode films.

[0028] The aforementioned control method for optical waveguides further includes, before acquiring the current external pressure and current external temperature:

[0029] The electrode film is pre-divided into multiple charge control regions, and a correspondence is established between external pressure, external temperature and the amount of charge in the charge control region.

[0030] The control method for the optical waveguide, wherein the step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes:

[0031] When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence.

[0032] According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

[0033] The control method for the optical waveguide, wherein the step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes:

[0034] When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the deformation position of the optical waveguide is obtained.

[0035] The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence;

[0036] According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

[0037] The control method for the optical waveguide, wherein the step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes:

[0038] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches the second preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence.

[0039] According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

[0040] The control method for the optical waveguide, wherein the step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes:

[0041] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, the deformation position of the optical waveguide is obtained.

[0042] The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence;

[0043] According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

[0044] An optical module includes an optical waveguide as described in any of the above claims, and further includes a projection device arranged corresponding to the optical waveguide.

[0045] A display device comprising the optical module as described above.

[0046] Beneficial effects: In this invention, electrode film layers are provided on the surfaces of both layered structures, and the same type of charge and opposite type of charge are output to the two electrode film layers through the driving power supply device, so that repulsive and attractive forces are generated between the two electrode film layers, thereby counteracting the deformation trend of the two layered structures, reducing or even avoiding the deformation of the two layered structures under the influence of the environment, thereby avoiding the degradation of the optical performance of the optical waveguide. Attached Figure Description

[0047] Figure 1 This is a reference diagram showing the usage status of optical waveguides under normal temperature and pressure in existing technologies;

[0048] Figure 2 This is a reference diagram showing the usage status of optical waveguides under low temperature and low pressure in existing technologies;

[0049] Figure 3 This is a reference diagram showing the usage state of the optical waveguide in Embodiment 1 of the present invention under normal temperature and pressure.

[0050] Figure 4 This is a schematic diagram of the distribution of multiple electrode film layers on the substrate structure in Embodiment 1 of the present invention;

[0051] Figure 5 This is a reference diagram showing the usage state of the optical waveguide in Embodiment 2 of the present invention under normal temperature and pressure;

[0052] Figure 6 This is a schematic diagram of the electrode film layer in Embodiment 3 of the present invention;

[0053] Figure 7 This is a reference diagram showing the usage state of the optical waveguide in Embodiment 3 of the present invention under normal temperature and pressure;

[0054] Figure 8 This is a functional principle block diagram of the optical waveguide described in this invention;

[0055] Figure 9 This is a schematic diagram of the straight groove envelope structure;

[0056] Figure 10 This is a schematic diagram of the helical tooth envelope structure;

[0057] Figure 11 This is a schematic diagram of the structure of the shimmering envelope;

[0058] Figure 12 This is a schematic diagram of the structure of the step envelope;

[0059] Figure 13 This is a schematic diagram of the structure of the curved envelope;

[0060] Figure 14 This is a schematic diagram of the structure of a holographic exposure grating;

[0061] Figure 15 This is a flowchart of the optical waveguide control method described in this invention. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0063] This invention provides an optical waveguide, such as Figure 3 and Figure 5As shown, the optical waveguide includes: at least two substrate structures 2, a driving power supply device 3, and two electrode film layers 4; wherein the at least two substrate structures 2 are arranged side by side in a stacked manner, and there is a gap 10 between adjacent two layers; the gap 10 is used to accommodate microstructures 14, and the microstructures 14 are disposed on the surface of at least one of the substrate structures 2. The driving power supply device 3 is electrically connected to the two electrode film layers 4 respectively to output the same or opposite charges to the two electrode film layers 4. In some embodiments, the material of the electrode film layer 4 is indium tin oxide semiconductor transparent conductive film (ITO); in other embodiments, ITO can also be used to construct TFTs. In some embodiments, the materials and thicknesses of the at least two substrate structures are the same; in other embodiments, the materials and / or thicknesses of the at least two substrate structures are different.

[0064] Two electrode film layers 4 are disposed at the gap 10 and correspondingly disposed on the surfaces of the two layer structures; that is, in the two layer structures corresponding to the gap 10, an electrode film layer 4 is disposed on the surface of each layer structure, and the electrode film layers 4 on the surfaces of the two layer structures are symmetrically arranged; in this way, when the driving power supply device 3 outputs the same type of charge to the two electrode film layers 4, based on the principle of like charges repulsion, the two layer structures tend to deform away from each other under the mutual repulsive force of the two electrode film layers 4, so as to counteract the concave deformation of the two layer structures. When the driving power supply device 3 outputs opposite types of charge to the two electrode film layers 4, based on the principle of opposite charges attraction, the two layer structures tend to deform towards each other under the mutual attractive force of the two electrode film layers 4, so as to counteract the convex deformation of the two layer structures.

[0065] Therefore, when the two layers corresponding to the gap 10 exhibit an inward deformation tendency under low temperature or high pressure conditions, the driving power supply device 3 outputs the same type of charge to the two electrode film layers 4, which can resist the inward deformation force of the two layers, reduce or even avoid the inward deformation of the two layers, thereby preventing a decrease in the display effect of the optical waveguide. When the two layers corresponding to the gap 10 exhibit an outward deformation tendency, the driving power supply device 3 outputs opposite types of charge to the two electrode film layers 4, which can resist the outward deformation force of the two layers, reduce or even avoid the outward deformation of the two layers, thereby improving the reliability of the optical waveguide and the stability of its optical performance.

[0066] In this invention, at least two electrode film layers 4 are respectively disposed on the surfaces of two layer structures, and the surface on the layer structure on which the electrode film layers 4 are disposed can be the surface corresponding to the gap 10 or the surface outside the gap 10. The driving power supply device 3 outputs the same or opposite charges to the two electrode film layers 4, causing repulsive or attractive forces between the two electrode film layers 4, thereby counteracting the deformation tendency of the two layer structures, reducing or even avoiding deformation of the two layer structures under environmental influences, and thus improving the reliability and stability of the optical waveguide's optical performance.

[0067] like Figure 3 As shown, the optical waveguide further includes a microstructure 14, which is disposed on at least one of the substrate layer structures 2 and located within the gap 10. In this invention, the driving power supply device 3 outputs the same or opposite charges to the two electrode film layers 4, reducing or even avoiding deformation of the two layer structures under environmental influences. Simultaneously, it supports and protects the microstructure 14, ensuring that it is not damaged by the inward compression of the layer structures under low temperature or high pressure environments, nor deformed by the outward convexity of the layer structures. This improves the reliability of the optical waveguide and the stability of its optical performance.

[0068] In one embodiment of the present invention, the microstructure 14 includes at least one of a surface relief grating, a holographic exposure grating, and a metasurface; that is, the microstructure 14 may include any one or more of a surface relief grating, a holographic exposure grating, and a metasurface. The surface relief grating may include a straight groove envelope (e.g., Figure 9 As shown), oblique tooth envelope (as shown) Figure 10 As shown), shimmering envelope (as shown) Figure 11 As shown), step envelope (as shown) Figure 12 (as shown) and curved bread (as shown) Figure 13 At least one envelope of (as shown); a holographic exposure grating (such as Figure 14 (As shown) can include a holographic grating envelope; the metasurface can include a straight groove envelope.

[0069] Embodiment 1 of the present invention

[0070] The electrode film layer 4 only covers a portion of the surface of the layer structure.

[0071] In one embodiment of this invention, the electrode film layer 4 is positioned on the layer structure corresponding to the microstructure 14. That is, the projection of the electrode film layer on the surface of the layer structure having the microstructure 14 overlaps with the microstructure 14, so that the electrode film layer 4 mainly acts on the position on the layer structure corresponding to the microstructure 14, thereby enhancing the protection of the microstructure 14.

[0072] One implementation method in this embodiment, such as Figure 3 and Figure 4 As shown, the electrode film layer 4 includes at least one electrode film body 410; that is, the electrode film body 410 can be one or more. Furthermore, when there are multiple electrode film bodies 410, there are gaps between adjacent electrode film bodies 410, allowing the multiple electrode film bodies 410 to be distributed and arranged on the surface of the layer structure. Therefore, when attractive or repulsive forces are generated between the corresponding electrode film bodies 410 on two surfaces, the forces acting on the corresponding layer structure are more balanced, thereby improving the surface shape of the layer structure. It should be noted that... Figure 4 Although the top view of the middle layer structure is circular, it can be any other shape in practical applications.

[0073] One implementation method in this embodiment, such as Figure 4 As shown, the electrode film body 410 is an annular electrode film body; when there are multiple electrode film bodies 410, the multiple electrode film bodies 410 are arranged concentrically, and the thickness of the multiple electrode film bodies 410 gradually changes along the direction from the edge to the center; the thickness of the electrode film body 410 is the average value of the thickness between the outer diameter and the inner diameter of the electrode film body 410. It should be noted that the annular shape does not necessarily have to be circular.

[0074] Specifically, the gradual change in thickness of the multiple electrode film bodies 410 is determined by the deformation characteristics of the corresponding layer structure. For example, when the concavity of the layer structure gradually decreases from the center to the edge under low temperature or high pressure conditions, the thickness of the multiple electrode film bodies 410 gradually decreases from the center to the edge. That is, the electrode film body 410 located at the center has the largest thickness, and the electrode film body 410 located at the outermost edge has the smallest thickness. This makes the force exerted by the electrode film body 410 on the layer structure gradually decrease from the center to the edge. The distribution of the force exerted by the electrode film body 410 on the layer structure is more matched with the deformation of the layer structure, further ensuring that the surface shape of the layer structure is maintained or close to a plane.

[0075] Embodiment 2 of the present invention

[0076] like Figure 5 As shown, the electrode film layer 4 covers the entire surface of the layer structure, so that the processing technology of coating the electrode film layer 4 on the surface of the layer structure is simpler.

[0077] One embodiment of the present invention, such as Figure 8 As shown, the optical waveguide also includes a control device 6. The driving power supply device 3 and the pressure detection device 5 are both electrically connected to the control device 6, so that the control device 6 can automatically control the driving power supply device 3 to output the same or opposite charges to the two electrode film layers 4 according to the detection result of the pressure detection device 5.

[0078] Embodiment 3 of the present invention

[0079] like Figure 6 As shown, the electrode film layer 4 includes: multiple pixel driving electrodes 420, multiple source lines 421, and multiple gate lines 422; the multiple source lines 421 are connected in parallel to the driving power supply device 3, and the multiple gate lines 422 are connected in parallel to the driving power supply device 3; the multiple source lines 421 and the multiple gate lines 422 are arranged in a one-to-one overlapping manner, thereby dividing the surface of the layer structure into multiple charge control regions 9, and the multiple charge control regions 9 are arranged in an array.

[0080] It should be noted that in the two-layer structure, such as Figure 7 As shown, a plurality of pixel driving electrodes 420 on one layer structure surface correspond one-to-one with a plurality of pixel driving electrodes 420 on another layer structure surface, thereby forming a pixel driving electrode unit 4200; correspondingly, a plurality of charge control regions 9 on one layer structure surface correspond one-to-one with a plurality of charge control regions 9 on another layer structure surface, so that two corresponding charge control regions 9 in the two layer structures form a charge control region unit.

[0081] like Figure 6 As shown, the driving power supply device 3 includes a source driver IC 31 and a gate driver IC 32. Multiple source lines 421 are connected in parallel to the source driver IC 31, and multiple gate lines 422 are connected in parallel to the gate driver IC 32. Multiple pixel driving electrodes 420 are arranged in an array, and each pixel driving electrode 420 corresponds one-to-one with a charge control region 9; specifically, each charge control region 9 has one corresponding pixel driving electrode 420.

[0082] The pixel driving electrode 420 is electrically connected to the corresponding source line 421 and gate line 422 via wires 7. That is, wires 7 are disposed within the charge control region 9, and these wires 7 are electrically connected to the corresponding source line 421, gate line 422, and pixel driving electrode 420, thereby achieving electrical connection between the pixel driving electrode 420 and the corresponding source line 421 and gate line 422. In some embodiments, the pixel driving electrode 420 is an ITO array or a TFT array. TFTs are thin-film transistors, possessing switching and amplification capabilities and enabling fast response.

[0083] The source line 421 and the gate line 422 are arranged perpendicularly, that is, the charge control region 9 forms a square charge control region 9, which is a conventional arrangement. This kind of pixelated control (programmable control) is simple and effective.

[0084] One embodiment of the present invention, such as Figure 8As shown, the optical waveguide also includes a heating device 11, which is electrically connected to the control device 6; the heating device 11 is disposed on the substrate structure 2.

[0085] When the ambient temperature drops to a first preset threshold, the control device 6 controls the heating device 11 to turn on in order to heat the space inside the gap 10, thereby preventing the base layer structure 2 from undergoing concave deformation due to the low temperature environment.

[0086] One embodiment of the present invention, such as Figure 3 As shown, each gap 10 is provided with a pad 13, and the pad 13 is connected to the two adjacent layer structures to support the two adjacent layer structures.

[0087] In one embodiment of this invention, there is at least one pad 13; the pad 13 is located around the microstructure 14 within the gap 10. The pad 13 is an optical adhesive pad.

[0088] In one embodiment of the present invention, the substrate structure 2 includes at least one of glass, resin, plastic, transparent ceramic, quartz, and SiC; that is, the substrate structure 2 may include any one or more of glass, resin, plastic, transparent ceramic, quartz, and SiC.

[0089] In one embodiment of the present invention, the base layer structure 2 can be a flat plate structure or a curved surface structure.

[0090] The present invention also provides an optical module, which includes an optical waveguide as described in any of the above claims, and further includes a projection device arranged corresponding to the optical waveguide. The projection device includes any one of a microLED (micro Light Emitting Diode Display) optical engine, an LCOS (Liquid Crystal On Silicon) optical engine, a DLP (Digital Light Processing) optical engine, and an LBS (Laser Beam Scanning) optical engine.

[0091] The present invention also provides a display device, the display device including the optical module as described in any of the above claims; the display device further includes a wearable device, and the optical module is disposed within the wearable device.

[0092] Based on any of the optical waveguides described above, the present invention also provides a method for controlling an optical waveguide, such as... Figure 15 As shown, it includes the following steps:

[0093] S100: Obtain the current external pressure and current external temperature;

[0094] S200: When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the same type of charge is applied to the two electrode films.

[0095] S300. When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, opposite charges are applied to the two electrode films.

[0096] Specifically, external pressure and temperature are closely related to the morphological changes of the optical waveguide. When the external pressure is higher than the internal pressure of the optical waveguide and / or the external temperature is lower than a certain set value (first preset threshold), two adjacent layers in the optical waveguide will undergo outward convex deformation; when the external pressure is lower than the internal pressure of the optical waveguide and / or the external temperature is higher than a certain set value (second preset threshold), two adjacent layers in the optical waveguide will undergo inward concave deformation. Therefore, this invention monitors the external temperature and pressure and determines the current morphology of the optical waveguide based on the external temperature and pressure, thereby performing corresponding charging operations on the two electrode film layers 4. The force generated by the two electrode film layers 4 counteracts the deformation of the optical waveguide, achieving the purpose of restoring the optical waveguide to its normal morphology.

[0097] Wherein, the first preset threshold is lower than the second preset threshold; when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches the first preset threshold, the optical waveguide undergoes concave deformation, and the two electrode film layers 4 are charged with the same type of charge. Through the repulsion of the like charges of the two electrode film layers 4, the optical waveguide returns to a planar state. When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches the second preset threshold, the optical waveguide undergoes convex deformation, and the two electrode film layers 4 are charged with opposite charges. Through the attraction of the opposite charges of the two electrode film layers 4, the optical waveguide returns to a planar state.

[0098] The wearable device is equipped with a pressure sensor 8 and a temperature sensor 12, both of which are electrically connected to the control device 6 (e.g., ...). Figure 8 As shown in the figure, the pressure sensor 8 obtains the current external pressure, and the temperature sensor 12 obtains the current external temperature.

[0099] Before obtaining the current external pressure and current external temperature, the following steps are also included:

[0100] The electrode film is pre-divided into multiple charge control regions, and a correspondence is established between external pressure, external temperature and the amount of charge in the charge control region.

[0101] Multiple charge-controlled regions are arranged in an array; stress testing is performed during the production process of the optical waveguide to test how the stress of the optical waveguide changes with external pressure and temperature, thereby establishing the correspondence between the changes and the charge amount of the charge-controlled regions.

[0102] Specifically, for each charge control region, the external pressure and external temperature are changed sequentially, and the charge control region is charged at the same time to stabilize the stress corresponding to the charge control region. Then, the external pressure, external temperature and charge amount corresponding to the charge control region when the stress is stable are obtained, and the correspondence between the external pressure, external temperature and the charge amount of the charge control region can be established.

[0103] It is understood that the division of the charge control region in this invention can be achieved through the structure of the electrode film layer described in Embodiment 3 above, that is, by arranging multiple source lines 421 and multiple gate lines 422 in a one-to-one overlapping manner, the electrode film layer 4 is divided into multiple charge control regions 9. The charge control region 9 can be circular, square, parallelogram or other shapes.

[0104] Regarding the control method for the inward deformation of the optical waveguide, in one embodiment of the present invention, the step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes:

[0105] When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence.

[0106] According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

[0107] Specifically, based on the current external pressure, the current external temperature, and the corresponding relationship, the amount of charge corresponding to the stress stability requirement of the charge control region under the current external pressure and the current external temperature can be obtained, thereby determining the amount of charge corresponding to each charge control region 9.

[0108] When the current external pressure exceeds the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the optical waveguide undergoes concave deformation. Based on the charge amount corresponding to each charge control region 9, the corresponding charge control region 9 is charged, and the charge types of the two electrode films 4 are made the same. Thus, during the deformation process, the repulsive electric field force generated by the two electrode films 4 counteracts the stress changes caused by the concave deformation, maintaining the entire system in the required stable state and ensuring the optical performance of the optical waveguide.

[0109] Regarding the control method corresponding to the concave deformation of the optical waveguide, in another embodiment of the present invention, the step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes:

[0110] When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the deformation position of the optical waveguide is obtained.

[0111] The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence;

[0112] According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

[0113] Specifically, each layer structure is also provided with a deformation detection mechanism 15, which is electrically connected to the control device 6 (e.g., Figure 8 As shown in the figure, the deformation detection mechanism 15 includes a piezoelectric thin film to obtain the deformation position corresponding to the deformation of the optical waveguide. Simultaneously, based on the current external pressure, the current external temperature, and the corresponding relationship, the amount of charge corresponding to the stress stability requirement of the charge control region 9 under the current external pressure and temperature conditions can be obtained, thereby determining the amount of charge corresponding to each charge control region 9. In this embodiment, charge filling is only performed at the deformation positions, while no charge filling is performed at the undeformed positions.

[0114] When the current external pressure exceeds the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the optical waveguide undergoes concave deformation. The deformation position of the optical waveguide is then determined, thereby obtaining the charge control region 9 corresponding to the deformation position. Based on the charge amount corresponding to each charge control region 9 at the deformation position, the corresponding charge control region 9 is charged, ensuring that the charge types of the two electrode films 4 are the same. Thus, during the deformation process, the repulsive electric field force generated by the two electrode films 4 counteracts the stress changes caused by the concave deformation, maintaining the entire system in the required stable state and ensuring the optical performance of the optical waveguide.

[0115] Regarding the control method for the outward convex deformation of the optical waveguide, in one embodiment of the present invention, the step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes:

[0116] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches the second preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence.

[0117] According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

[0118] Specifically, based on the current external pressure, the current external temperature, and the corresponding relationship, the amount of charge corresponding to the stress stability requirement of the charge control region 9 under the current external pressure and the current external temperature conditions can be obtained, thereby determining the amount of charge corresponding to each charge control region 9.

[0119] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, the optical waveguide undergoes outward convex deformation. According to the charge amount corresponding to each charge control region 9, the corresponding charge control region 9 is charged, and the charge types of the two electrode film layers 4 are different. Thus, during the deformation process, the stress change caused by the outward convex deformation is counteracted by the attractive electric field force brought by the two electrode film layers 4, so that the entire system is maintained in the required stable state and the optical performance of the optical waveguide is guaranteed.

[0120] Regarding the control method for the outward convex deformation of the optical waveguide, in another embodiment of the present invention, the step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes:

[0121] When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, the deformation position of the optical waveguide is obtained.

[0122] The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence;

[0123] According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

[0124] Specifically, in this embodiment, charge filling is performed only on the deformed locations, while no charge filling is performed on the undeformed locations.

[0125] Based on the current external pressure, the current external temperature, and the corresponding relationship, the amount of charge corresponding to the stress stability requirement of the charge control region 9 under the current external pressure and temperature conditions can be obtained, thereby determining the amount of charge corresponding to each charge control region 9. When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, the optical waveguide undergoes outward convex deformation. The deformation position of the optical waveguide is then obtained, thereby obtaining the charge control region 9 corresponding to the deformation position. According to the amount of charge corresponding to each charge control region 9 at the deformation position, the corresponding charge control region 9 is charged, and the charge types of the two electrode film layers 4 are made different. Thus, during the deformation process, the stress change caused by the outward convex deformation is counteracted by the attractive electric field force brought by the two electrode film layers 4, so that the entire system is maintained in the required stable state, ensuring the optical performance of the optical waveguide.

[0126] In summary, this invention provides an optical waveguide, a control method for the optical waveguide, an optical module, and a display device. The optical waveguide includes: at least two substrate layer structures; the at least two substrate layer structures are stacked vertically, with a gap between them; at least two electrode film layers are respectively disposed on the surfaces of the two layer structures; and a driving power supply device is electrically connected to the two electrode film layers to output the same or opposite charges to the two electrode film layers. In this invention, the electrode film layers are disposed on the surfaces of both layer structures, and the driving power supply device outputs the same and opposite charges to the two electrode film layers, causing repulsive or attractive forces to be generated between the two electrode film layers. This counteracts the deformation tendency of the two layer structures, reduces or even avoids deformation of the two layer structures under environmental influences, and thus avoids the degradation of the optical performance of the optical waveguide.

[0127] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An optical waveguide, characterized in that, It includes: Two basal layer structures; The two base layer structures are stacked one on top of the other, and there is a gap between the two base layer structures; Two electrode film layers are respectively disposed on the surfaces of two substrate structures, and the surface on the substrate structure on which the electrode film layers are disposed is either the surface corresponding to the gap or the surface outside the gap; The driving power supply device is electrically connected to the two electrode film layers respectively, so as to output the same or opposite charges to the two electrode film layers, so that the two electrode film layers generate repulsive or attractive forces, thereby counteracting the deformation trend of the two base layer structures and reducing or even avoiding the deformation of the two base layer structures under the influence of the environment.

2. The optical waveguide according to claim 1, characterized in that, The electrode film is made of ITO.

3. The optical waveguide according to claim 1, characterized in that, The electrode film layer covers all or part of the surface of the substrate structure.

4. The optical waveguide according to claim 3, characterized in that, It also includes: Microstructures are disposed within the gaps and located on at least one base layer structure; When the electrode film covers a portion of the surface of the substrate structure, the electrode film corresponds to the microstructure.

5. The optical waveguide according to claim 3, characterized in that, The electrode film layer includes at least one electrode film body; when there are multiple electrode film bodies, there is a gap between two adjacent electrode film bodies.

6. The optical waveguide according to claim 5, characterized in that, The electrode film body is an annular electrode film body; when there are multiple electrode film bodies, the multiple electrode film bodies are arranged concentrically, and the thickness of the multiple electrode film bodies gradually changes along the direction from the edge to the center, or the amount of charge applied gradually changes along the direction from the edge to the center.

7. The optical waveguide according to claim 1, characterized in that, The electrode film layer includes: Multiple source lines are connected in parallel to the drive power supply device; Multiple gate lines are connected in parallel to the driving power supply device; multiple source lines and multiple gate lines are arranged in a one-to-one overlapping manner to divide the surface of the substrate structure into multiple charge control regions arranged in an array. Multiple pixel driving electrodes are arranged in an array, and each charge control region has a corresponding pixel driving electrode; the pixel driving electrodes are electrically connected to the corresponding source line and gate line respectively.

8. The optical waveguide according to claim 1, characterized in that, It also includes: A heating device is disposed on the base layer structure.

9. A control method for an optical waveguide based on any one of claims 1-8, characterized in that, It includes: Obtain the current external pressure and current external temperature; When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the two electrode films are charged with the same type of charge. When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, opposite charges are applied to the two electrode films.

10. The control method for an optical waveguide according to claim 9, characterized in that, Before obtaining the current external pressure and current external temperature, the following steps are also included: The electrode film is pre-divided into multiple charge control regions, and a correspondence is established between external pressure, external temperature and the amount of charge in the charge control region.

11. The control method for an optical waveguide according to claim 10, characterized in that, The step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes: When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence. According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

12. The control method for an optical waveguide according to claim 10, characterized in that, The step of charging the two electrode films with the same charge when the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold specifically includes: When the current external pressure is greater than the internal pressure of the optical waveguide and / or the current external temperature reaches a first preset threshold, the deformation position of the optical waveguide is obtained. The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence; According to the amount of charge corresponding to each charge control region, charge the corresponding charge control region, and make the charge type of the two electrode films the same.

13. The control method for an optical waveguide according to claim 10, characterized in that, The step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes: When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches the second preset threshold, the amount of charge corresponding to each charge control region is determined according to the correspondence. According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

14. The control method for an optical waveguide according to claim 10, characterized in that, The step of charging the two electrode films with opposite charges when the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold specifically includes: When the current external pressure is less than the internal pressure of the optical waveguide and / or the current external temperature reaches a second preset threshold, the deformation position of the optical waveguide is obtained. The charge amount of each charge control region corresponding to the deformation position is determined according to the correspondence; According to the amount of charge corresponding to each charge control region, the corresponding charge control region is charged, and the types of charges in the two electrode films are different.

15. An optical module, characterized in that, It includes an optical waveguide as described in any one of claims 1-8, and further includes a projection device arranged corresponding to the optical waveguide.

16. A display device, characterized in that, It includes the optical module as described in claim 15.

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