Liquid crystal structure having phase compensation function, imaging system, and preparation method

Abstract

The present application relates to the technical field of display devices, and in particular to a liquid crystal structure having a phase compensation function, an imaging system, and a preparation method. The liquid crystal structure comprises: a substrate layer, a back panel layer, a conductive layer, a liquid crystal film layer, an anti-reflective layer, a first compensation layer, and a second compensation layer. The anti-reflective layer, the substrate layer, the conductive layer, the liquid crystal film layer, and the back panel layer are sequentially stacked in a first direction. The first compensation layer is arranged between any two adjacent layers, and the second compensation layer is arranged between any two adjacent layers. The first direction is the thickness direction of the anti-reflective layer, the substrate layer, the conductive layer, the liquid crystal film layer, and the back panel layer. The first compensation layer is used for compensating in-plane retardation of the liquid crystal film layer, and the second compensation layer is used for compensating out-of-plane retardation of the liquid crystal film layer. In the liquid crystal structure in the present application, the first compensation layer and the second compensation layer are integrated, eliminating the in-plane retardation and out-of-plane retardation of the liquid crystal structure; and an external compensation film does not need to be arranged, thereby shortening the preparation time of the imaging system when the liquid crystal structure is applied to the imaging system.

Description

Liquid crystal structure with phase compensation function, imaging system and preparation method

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202410544036.X, filed on April 30, 2024, and entitled "Liquid crystal structure with phase compensation function, imaging system and preparation method", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of display devices, and in particular to a liquid crystal structure with phase compensation function, an imaging system and a preparation method. BACKGROUND

[0004] When the liquid crystal structure formed by the silicon-based liquid crystal is applied to the imaging system, the residual birefringence in the liquid crystal layer of the silicon-based liquid crystal will affect the contrast ratio of the imaging system. Therefore, in order to eliminate the influence of the residual birefringence in the liquid crystal layer, a compensation sheet is generally provided in the imaging system. However, the compensation sheet and the liquid crystal structure are two independent devices, and the compensation sheet and the liquid crystal structure need to be precisely aligned to make their positions relatively fixed, which will result in a long preparation time and high cost of the imaging system. SUMMARY

[0005] The present application provides a liquid crystal structure with phase compensation function, an imaging system and a preparation method. The liquid crystal structure integrates a first compensation layer and a second compensation layer to eliminate the in-plane retardation and the out-of-plane retardation of the liquid crystal structure, without the need to set a compensation sheet outside, which can reduce the preparation time of the imaging system when the liquid crystal structure is applied to the imaging system.

[0006] In a first aspect, the present application provides a liquid crystal structure with phase compensation function, the liquid crystal structure comprising: a substrate layer, a back plate layer, a conductive layer, a liquid crystal film layer, an anti-reflection layer, a first compensation layer and a second compensation layer. The anti-reflection layer, the substrate layer, the conductive layer, the liquid crystal film layer and the back plate layer are sequentially stacked along a first direction, the first compensation layer is arranged between any two adjacent layers, and the second compensation layer is arranged between any two adjacent layers, the first direction being the thickness direction of the anti-reflection layer, the substrate layer, the conductive layer, the liquid crystal film layer and the back plate layer, wherein: the first compensation layer is used to compensate the in-plane retardation of the liquid crystal film layer, and the second compensation layer is used to compensate the out-of-plane retardation of the liquid crystal film layer. In this way, the liquid crystal structure integrates the first compensation layer and the second compensation layer, and the first compensation layer and the second compensation layer can offset the in-plane retardation and the out-of-plane retardation of the liquid crystal film layer, so as to improve the contrast of the liquid crystal structure with phase compensation function. When the imaging system is prepared, the liquid crystal structure and the compensation sheet do not need to be optically coupled, thereby reducing the preparation complexity of the imaging system, reducing the preparation time of the imaging system, and reducing the cost.

[0007] In an embodiment, the liquid crystal film layer comprises an upper alignment layer, a liquid crystal layer and a lower alignment layer, the liquid crystal layer is located between the upper alignment layer and the lower alignment layer, and the lower alignment layer is close to the back plate layer; the slow axis of the liquid crystal layer is oriented at an angle between 0° and 90° with respect to the first direction. The slow axis of the first compensation layer is oriented at an angle between 0° and 90° with respect to the first direction. And the angle between the slow axis of the second compensation layer and the first direction is a set angle; the slow axis of the second compensation layer is parallel to the first direction. The first compensation layer can offset the in-plane retardation of the liquid crystal layer, and the second compensation layer can offset the out-of-plane retardation of the liquid crystal layer.

[0008] In an embodiment, the set angle is 85°-95°, so as to ensure that the slow axis of the first compensation layer is orthogonal to the slow axis of the liquid crystal layer as much as possible, so that the first compensation layer offsets the in-plane retardation of the liquid crystal layer.

[0009] In an embodiment, in order to reduce the interval voltage between the back plate layer and the substrate layer, the first compensation layer and the second compensation layer are stacked, the second compensation layer is arranged on the side of the substrate layer away from the conductive layer, and the first compensation layer is arranged between the second compensation layer and the anti-reflection layer. Or the first compensation layer and the second compensation layer are stacked, the first compensation layer is arranged on the side of the substrate layer away from the conductive layer, and the second compensation layer is arranged between the first compensation layer and the anti-reflection layer.

[0010] In an embodiment, the substrate layer comprises at least one first positioning mark, the first positioning mark is used to define the groove orientation of the upper groove included in the upper alignment layer. In this way, the first positioning mark can be read by a manufacturing device, and the manufacturing device prepares the upper alignment layer on the surface of the conductive layer according to the read first positioning mark, so as to facilitate the preparation of the upper alignment layer. ​​​

[0011] In one embodiment, the at least one first positioning mark forms a first planar rectangular coordinate system on the surface of the base layer, and the upper alignment layer comprises a plurality of parallel upper grooves, and the included angle between the projection of the plurality of upper grooves on the base layer and the X axis of the first planar rectangular coordinate system is

[0012] In one embodiment, the back plate layer comprises at least one second positioning mark, the second positioning mark is used to define the groove orientation of the lower grooves comprised in the lower alignment layer in the production stage, and the second positioning mark corresponds to the first positioning mark to align the base layer with the back plate layer for packaging. In this way, the second positioning mark can be read by a manufacturing device, the manufacturing device prepares the lower alignment layer according to the read second positioning mark, and the manufacturing device can correspond the second positioning mark and the first positioning mark, so that, when the liquid crystal structure is prepared, the optical coupling alignment does not need to be performed due to the setting of the first compensation layer, and the preparation of the liquid crystal structure is simplified.

[0013] In one embodiment, the at least one second positioning mark forms a second planar coordinate system on the surface of the back plate layer, and the lower alignment layer comprises a plurality of parallel lower grooves, and the included angle between the projection of the plurality of lower grooves on the back plate layer and the X axis of the second planar coordinate system is In the first direction, the first planar rectangular coordinate system and the second planar coordinate system coincide, and the slow axis of the liquid crystal layer is oriented in the projection of the first planar rectangular coordinate system or the second planar coordinate system The value range of and The setting of the first planar coordinate system and the second coordinate system can facilitate the definition of the value range of the slow axis orientation of the liquid crystal layer The preparation of the liquid crystal structure is simplified.

[0014] In the above embodiment, the at least one first positioning mark is used to make the rubbing member rub on the surface of the upper alignment layer in a specific direction to make the upper alignment layer form a plurality of parallel upper grooves. The at least one second positioning mark is used to make the rubbing member rub on the surface of the lower alignment layer in a specific direction to make the lower alignment layer form a plurality of parallel lower grooves.

[0015] In one embodiment, the first positioning mark or the second positioning mark is used to define the slow axis orientation of the first compensation layer in the production stage to make the slow axis orientation of the first compensation layer more accurate.

[0016] In one embodiment, the first compensation layer is a thin film deposited obliquely, or the first compensation layer is a one-dimensional subwavelength grating; and the second compensation layer is an alternatingly deposited thin film. The material of the first compensation layer can be at least one of SiO2, Ta2O2, Al2O3, HfO2, TiO2, Nb2O5, MgF2, ZnO, Y2O3, ZrO2, ITO, Si3N4, or WO2. The material of the second compensation layer is at least two of SiO2, Ta2O2, Al2O3, HfO2, TiO2, Nb2O5, MgF2, ZnO, Y2O3, ZrO2, ITO, Si3N4, or WO2.

[0017] In a second aspect, the present application also provides an imaging system, which comprises a polarizer, a polarization beam splitter, a polarizing plate, and the liquid crystal structure with the phase compensation function according to any of the technical solutions of the first aspect. The polarization beam splitter is located between the polarizer and the liquid crystal structure with the phase compensation function. The polarizing plate is located on one side of the liquid crystal structure with the phase compensation function and extends along the thickness direction of the liquid crystal structure with the phase compensation function. After passing through the polarizer and the polarization beam splitter, the light is converted into linearly polarized light, which enters the liquid crystal structure with the phase compensation function. The liquid crystal layer in the liquid crystal structure with the phase compensation function maintains or changes the polarization state of the linearly polarized light, and the linearly polarized light is reflected by the polarization beam splitter into the polarizing plate or transmitted into the polarizer. Specifically, in the bright state, the liquid crystal layer in the liquid crystal structure with the phase compensation function twists the polarization direction of the linearly polarized light by 90° to be directed to the polarization beam splitter and reflected by the polarization beam splitter into the polarizing plate. In the dark state, the liquid crystal layer in the liquid crystal structure with the phase compensation function, together with the first compensation layer and the second compensation layer, maintains the polarization direction of the linearly polarized light to be directed to the polarization beam splitter and transmitted by the polarization beam splitter into the polarizer. In the present application, the liquid crystal structure integrates the first compensation layer and the second compensation layer to compensate for the in-plane retardation and the out-of-plane retardation of the liquid crystal layer in the liquid crystal structure. In the imaging system, no compensation plate is needed, thereby simplifying the preparation process of the imaging system, reducing the preparation time, and lowering the cost, and also ensuring the contrast.

[0018] In a third aspect, the present application also provides a preparation method of the liquid crystal structure with the phase compensation function according to the first aspect. The preparation method comprises the following steps: preparing a back plate layer and a substrate layer; and preparing the liquid crystal structure comprising the first compensation layer, the second compensation layer, the conductive layer, the liquid crystal film layer, and the anti-reflection layer based on the back plate layer and / or the substrate layer, wherein the first compensation layer and the second compensation layer are located between the anti-reflection layer and the back plate layer. The liquid crystal structure prepared by the method has a high contrast. When the liquid crystal structure is applied to an imaging system, no optical coupling of the liquid crystal structure and the compensation plate is needed, thereby reducing the preparation complexity of the imaging system, reducing the preparation time of the imaging system, and lowering the cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1a is a structural schematic diagram of an imaging system according to an embodiment of the present application;

[0020] Fig. 1b is a flow chart of a method for preparing the liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0021] Fig. 2a is a structural schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0022] Fig. 2b is a flow chart of a method for preparing the liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0023] Fig. 3a is a structural schematic diagram of an upper alignment layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0024] Fig. 3b is a structural schematic diagram of a substrate layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0025] Fig. 3c is a structural schematic diagram of a back plate layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0026] Fig. 3d is a top view of the alignment of the back plate layer and the substrate layer;

[0027] Fig. 4 is a structural schematic diagram of a first compensation layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0028] Fig. 5 is another structural schematic diagram of a first compensation layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0029] Fig. 6 is a structural schematic diagram of a second compensation layer of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0030] Fig. 7a is another structural schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0031] Fig. 7b is a flow chart of a method for preparing the liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0032] Fig. 8a is another structural schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0033] Fig. 8b is a flow chart of a method for preparing the liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0034] Fig. 9a is another structural schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0035] Fig. 9b is a flow chart of a method for preparing the liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0036] Figure 10a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0037] Figure 10b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 10a;

[0038] Figure 11a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0039] Figure 11b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 11a;

[0040] Figure 12a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0041] Figure 12b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 12a;

[0042] Figure 13a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0043] Figure 13b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 13a;

[0044] Figure 14a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0045] Figure 14b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 14a;

[0046] Figure 15a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0047] Figure 15b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 15a;

[0048] Figure 16a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0049] Figure 16b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 16a;

[0050] Figure 17a is another schematic diagram of a liquid crystal structure with phase compensation function according to an embodiment of the present application;

[0051] Figure 17b is a flowchart of a method for preparing the liquid crystal structure with phase compensation function in Figure 17a.

[0052] Reference signs: 1 - liquid crystal structure; 2 - polarizer; 3 - polarization beam splitter; 4 - polarizing plate; 10 - base layer; 11 - first positioning mark; 20 - back plate layer; 21 - second positioning mark; 30 - conductive layer; 40 - liquid crystal film layer; 41 - upper orientation layer; 410 - upper groove; 42 - liquid crystal layer; 43 - lower orientation layer; 50 - anti-reflection layer; 60 - first compensation layer; 61 - deposition plate; 62 - nano pillar; 63 - deposition film; 630 - grating; 64 - filling layer; 70 - second compensation layer; 71 - second sub-compensation layer. DETAILED DESCRIPTION

[0053] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0054] Phase delay can be described as in-plane delay and out-of-plane delay. In-plane delay refers to the product of the difference between the in-plane mutually orthogonal refractive index and the thickness of the optical element; out-of-plane delay refers to the product of the difference between the refractive index along the thickness direction of the optical element and the average in-plane refractive index and the thickness of the optical element. In general, the liquid crystal molecules in the silicon-based liquid crystal are arranged in a certain angle inclined to the normal of the panel, which leads to the liquid crystal structure having both in-plane residual delay and out-of-plane residual delay. The incident light perpendicular to the panel only suffers from in-plane delay, while the oblique incident light suffers from both in-plane delay and out-of-plane delay. In order to eliminate the in-plane delay and out-of-plane delay of the liquid crystal structure, in the prior art, the in-plane delay and out-of-plane delay of the liquid crystal structure are generally eliminated by an external compensation sheet. However, in this way, the compensation sheet and the liquid crystal structure need to be precisely aligned to make their positions relatively fixed, which in turn leads to a long preparation time and high cost of the imaging system.

[0055] The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" are intended to include both singular and plural forms, unless the context clearly indicates otherwise.

[0056] Reference within this specification to "one embodiment" or "an embodiment" or "a specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, however, are meant to signify that, although a particular feature, structure, or characteristic might be included in the process, process variation, or method being described, it is not mandatory and can or can not be dependent on another feature, structure, or characteristic so described. The terms "including," "comprising," "having," and variations thereof are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0057] The present application provides a lighting device, which comprises a light source and an imaging system, the light source providing light for the imaging system. Fig. 1a is a structural schematic diagram of an imaging system provided by an embodiment of the present application. Referring to Fig. 1a, the imaging system comprises a polarizer 2, a polarization beam splitter 3, a polarizer plate 4, an imaging lens, and a liquid crystal structure with phase compensation function, the polarization beam splitter 3 being located between the polarizer 2 and the liquid crystal structure, the polarizer plate 4 being located on one side of the liquid crystal structure and extending along the thickness direction of the liquid crystal structure, and the light source being located on the side of the polarizer 2 away from the liquid crystal structure 1. The light emitted by the light source is converted into linearly polarized light after passing through the polarizer 2 and the polarization beam splitter 3, the linearly polarized light enters the liquid crystal structure 1, the liquid crystal layer 42 in the liquid crystal structure 1 modulates the polarization state of the linearly polarized light and reflects it to the polarization beam splitter 3, the light reflected by the polarization beam splitter 3 according to the polarization state enters the polarizer plate 4, the light passing through the polarizer plate 4 enters the imaging lens, or the light transmits through the polarization beam splitter 3 to enter the polarizer 2, and the light passing through the polarizer 2 returns to the light source. In this process, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure 1, the first compensation layer 60 can compensate for the in-plane retardation of the liquid crystal film layer in the liquid crystal structure, the second compensation layer 70 can compensate for the out-of-plane retardation of the liquid crystal film layer in the liquid crystal structure, and the contrast of the liquid crystal structure is ensured, thereby improving the contrast of the imaging system.

[0058] The liquid crystal structure with phase compensation function comprises a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60, and a second compensation layer 70, the first compensation layer 60 is arranged between any two adjacent layers, and the second compensation layer 70 is arranged between any two adjacent layers. The first compensation layer 60 is used to compensate for the in-plane retardation of the liquid crystal film layer 40, and the second compensation layer 70 is used to compensate for the out-of-plane retardation of the liquid crystal film layer 40, thereby reducing the in-plane retardation and the out-of-plane retardation generated by the liquid crystal film layer and improving the contrast of the liquid crystal structure.

[0059] Fig. 1b is a flow chart of a preparation method of the liquid crystal structure with phase compensation function provided by an embodiment of the present application. Referring to Fig. 1b, the preparation method can comprise the following steps:

[0060] S10: Prepare the backsheet layer and substrate layer;

[0061] S20: Prepare a liquid crystal structure comprising a first compensation layer, a second compensation layer, a conductive layer, a liquid crystal film layer and an anti-reflection layer based on a backplate layer and / or a substrate layer, wherein the first compensation layer and the second compensation layer are located between the anti-reflection layer and the backplate layer.

[0062] The liquid crystal structure with phase compensation function provided in this application will be described in more detail below.

[0063] Figure 2a is a schematic diagram of a liquid crystal structure with phase compensation function provided in an embodiment of this application. Referring to Figure 2a, the liquid crystal structure with phase compensation function includes a substrate layer 10, a backplate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60, and a second compensation layer 70; the first direction is the thickness direction of the substrate layer 10, the backplate layer 20, the conductive layer 30, the liquid crystal film layer 40, and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer, and the backplate layer 20 are stacked sequentially along the first direction. The first compensation layer 60 is disposed between the substrate layer 10 and the conductive layer 30, and the second compensation layer 70 is disposed between the anti-reflection layer 50 and the substrate layer 10. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42, and a lower alignment layer 43 stacked sequentially. The liquid crystal layer 42 has a slow axis, and the slow axis orientation of the liquid crystal layer 42 is as follows: The slow axis orientation of the first compensation layer 60 is as follows: and The included angle between the two layers is a set angle, which enables the in-plane retardation of the liquid crystal film layer 40 to cancel out the in-plane retardation of the first compensation layer 60. The optical axis orientation of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can cancel out the inner and outer surface retardations of the liquid crystal structure with phase compensation function. This improves the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated within the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function to improve the contrast of the liquid crystal structure with phase compensation function. When fabricating an imaging system, there is no need to optically couple the liquid crystal structure with phase compensation function and the compensation sheet, reducing the fabrication complexity of the imaging system, reducing the fabrication time of the imaging system, and reducing costs.

[0064] The first compensation layer 60 has in-plane birefringence and is set at an angle of 85° to 95°, which is the slow axis orientation of the first compensation layer 60. Slow-axis alignment with liquid crystal layer 42 The included angle between them is 85° to 95° to ensure the slow axis orientation of the first compensation layer 60. Slow-axis alignment with liquid crystal layer 42 orthogonal or close to orthogonal to each other to compensate for the in-plane retardation of the liquid crystal layer 42.

[0065] FIG. 2b is a flowchart of a method for preparing the liquid crystal structure with the phase compensation function in FIG. 2a, which includes the following steps:

[0066] S11: preparing a backplane layer and a substrate layer;

[0067] S21: preparing a second compensation layer on the side of the substrate layer away from the backplane layer, and preparing an anti-reflection layer on the side of the second compensation layer away from the substrate layer;

[0068] S31: preparing a first compensation layer on the side of the substrate layer facing the backplane layer, and preparing a conductive layer on the side of the first compensation layer away from the substrate layer;

[0069] S41: preparing a liquid crystal film layer between the conductive layer and the backplane layer.

[0070] FIG. 3a is a schematic structural diagram of the upper alignment layer 41 of the liquid crystal structure with the phase compensation function provided in the embodiments, FIG. 3b is a schematic structural diagram of the substrate layer 10 of the liquid crystal structure with the phase compensation function provided in the embodiments, FIG. 3c is a schematic structural diagram of the backplane layer 20 of the liquid crystal structure with the phase compensation function provided in the embodiments, and FIG. 3d is a top view of the alignment of the backplane layer 20 and the substrate layer 10. Referring to FIGS. 2a, 3a-3d, in an embodiment, the substrate layer 10 includes at least one first positioning mark 11, which is used to define the groove orientation of the upper grooves 410 included in the upper alignment layer 41. The first positioning mark 11 can be a notch on the substrate layer 10, or the first positioning mark 11 can be a cut edge of the substrate layer 10 and an edge perpendicular to the cut edge, or the first positioning mark 11 can be a cross-shaped pattern formed on the surface of the substrate layer 10, and when the first positioning mark 11 is a cross-shaped pattern, the first positioning mark 11 can be two.

[0071] Specifically, the first positioning mark 11 can form a first plane rectangular coordinate system on the surface of the substrate layer 10, and the upper alignment layer 41 includes a plurality of parallel upper grooves 410, and the included angle between the projection of the plurality of upper grooves 410 on the substrate layer 10 and the X-axis of the first plane rectangular coordinate system is

[0072] The back plate layer 20 comprises at least one second positioning mark 21, which is used to define the groove orientation of the lower grooves comprised by the lower orientation layer 43 in the production stage, and the second positioning mark 21 corresponds to the first positioning mark 11 for aligning the base layer 10 and the back plate layer 20 for packaging. In this way, the alignment of the base layer 10 and the back plate layer 20 is more convenient when the liquid crystal structure with phase compensation function is prepared. The upper orientation layer and the lower orientation layer are prepared by aligning the first positioning mark 11 and the second positioning mark 21 between the base layer and the back plate layer 20, which can reduce the difficulty of operation and the preparation time compared with the way of optical coupling between the liquid crystal structure and the external phase compensator.

[0073] The second positioning mark 21 can be a notch on the back plate layer 20, or the second positioning mark 21 can be a cut edge of the back plate layer 20 and an edge perpendicular to the cut edge, or the second positioning mark 21 can be a cross-shaped pattern formed on the surface of the back plate layer 20.

[0074] Specifically, the second positioning mark 21 can form a second plane rectangular coordinate system on the surface of the back plate layer 20, and the lower orientation layer 43 comprises a plurality of parallel lower grooves, and the included angle between the groove orientation of the plurality of lower grooves and the X axis of the second plane rectangular coordinate system is The first plane rectangular coordinate system and the second plane rectangular coordinate system coincide along the first direction, and it can be understood that the included angle between the groove orientation of the plurality of upper grooves 410 and the X axis of the second plane rectangular coordinate system is also The included angle between the groove orientation of the plurality of lower grooves and the X axis of the first plane rectangular coordinate system is also In the projection of the first plane rectangular coordinate system or the second plane coordinate system, the slow axis of the liquid crystal layer 42 is oriented The value range of the slow axis of the liquid crystal layer 42 is between and .

[0075] In the above embodiment, the materials of the upper orientation layer 41 and the lower orientation layer 43 can be spin-coated polyimide film, and nylon, fiber or cotton wool and the like are used as the material to rub in a certain direction according to the first positioning mark 11 and the second positioning mark, so as to form a plurality of grooves arranged in a certain direction in the orientation layer material.

[0076] Figure 4 is a schematic diagram of a structure of the first compensation layer 60 of the liquid crystal structure with phase compensation function according to an embodiment of the present application. Referring to Figure 4, in one embodiment, the first compensation layer 60 is formed by an oblique deposition process, and the first compensation layer 60 can include a plurality of parallel nanorods 62. In the specific preparation of the first compensation layer 60, the angle between the trajectory of the gaseous particles and the thickness direction of the deposition plate 61 is θ, the gaseous particles are deposited on the deposition plate 61 to form a plurality of parallel nanorods 62, the plurality of parallel nanorods 62 are arranged in an array, and the angle between the nanorods 62 and the first direction is β. By adjusting the process conditions, the oblique angle β and the filling degree of the nanorods 62 are adjusted, and different in-plane retardation amounts can be achieved. The angle of the deposition plate 61 is adjusted according to the first positioning mark 11 or the second positioning mark 21, which is equivalent to adjusting the azimuth angle of the gaseous particles during deposition, and the azimuth angle of the trajectory of the gaseous particles projected on the deposition plate 61 is changed to ensure that the slow axis of the first compensation layer 60 is oriented The positioning is accurate.

[0077] In the present embodiment, the first compensation layer 60 is arranged between the base layer 10 and the conductive layer 30, and the deposition plate 61 can be the base layer 10. The azimuth angle during deposition is adjusted by the first positioning mark 11, that is, the trajectory of the gaseous particles during deposition is adjusted, and then the angle between the projection of the trajectory of the gaseous particles during deposition and the X-axis of the first orthogonal coordinate system is adjusted.

[0078] Figure 5 is another schematic diagram of the first compensation layer 60 in the liquid crystal structure with phase compensation function according to an embodiment of the present application. Referring to Figure 5, when the first compensation layer 60 is a one-dimensional subwavelength grating 630 structure, the one-dimensional subwavelength grating 630 structure can include a deposition plate 61, a deposition film 63, and a filling layer 64. The materials of the deposition film 63 and the filling layer 64 are different, and the two different materials have different refractive indices. At this time, the orientation of the one-dimensional subwavelength grating 630 structure is determined according to the slow axis orientation of the first compensation layer 60, so that the slow axis orientation of the first compensation layer 60 and the slow axis orientation of the liquid crystal layer 42 form an angle of a set value when projected on the base layer 10. The surface of the deposition plate 61 forms the deposition film 63 by deposition, the deposition film 63 forms a plurality of gratings 630 with a certain orientation by etching, two adjacent gratings 630 are arranged with a spacing, and the filling layer 64 fills the gap between the gratings 630 and covers the gratings 630. The in-plane retardation amount of the first compensation layer 60 is adjusted by adjusting the filling amount of the filling layer 64, so that the retardation amount of the first compensation layer 60 and the retardation amount of the liquid crystal film layer are offset.

[0079] In one embodiment, the lower alignment layer 43 has the same structure and preparation method as the upper alignment layer 41, and the lower alignment layer 43 is prepared with the second positioning mark 21 on the back plate layer 20. In this embodiment, the lower alignment layer 43 is prepared with the second positioning mark 21 on the back plate layer 20, the first compensation layer 60 is prepared on one side of the substrate layer 10 with the first positioning mark 11, and the slow axis of the first compensation layer 60 is oriented in the first direction, and then the conductive layer 30 is prepared on the first compensation layer 60, and then the upper alignment layer 41 is prepared with the first positioning mark 11, and then the second compensation layer 70 is prepared on the other side of the substrate layer 10, the slow axis of the second compensation layer 70 is oriented in parallel with the thickness direction of the substrate layer 10, and then the anti-reflection layer 50 is prepared. Finally, the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20 are aligned, the liquid crystal layer 42 is filled between the upper alignment layer 41 and the lower alignment layer 43, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0080] FIG. 6 is a schematic view of one structure of the second compensation layer 70 in the liquid crystal structure with phase compensation function provided in the embodiments of the present application. Referring to FIG. 6, the second compensation layer 70 can be an alternatingly deposited thin film, i.e., the second compensation layer 70 includes a plurality of second sub-compensation layers 71, the materials of the plurality of second sub-compensation layers 71 are different, and the volume ratios of the refractive materials of the plurality of second sub-compensation layers 71 are different, so that the slow axis of the second compensation layer 70 is oriented in parallel with the first direction. The plurality of second sub-compensation layers 71 are alternatingly deposited, and the volume ratios of the respective sub-compensation layers are controlled, so that the second compensation layer 70 can have an out-of-plane retardation greater than 100 nm.

[0081] It is worth mentioning that when the number of the second sub-compensation layers 71 is greater than two, the materials of the plurality of second sub-compensation layers 71 can also be two.

[0082] In the above embodiments, the material of the first compensation layer 60 can be at least one of SiO2, Ta2O2, Al2O3, HfO2, TiO2, Nb2O5, MgF2, ZnO, Y2O3, ZrO2, ITO, Si3N4, or WO2. The material of the second compensation layer 70 is at least two of SiO2, Ta2O2, Al2O3, HfO2, TiO2, Nb2O5, MgF2, ZnO, Y2O3, ZrO2, ITO, Si3N4, or WO2.

[0083] In one embodiment, the sum of the thicknesses of the anti-reflection film, the second compensation layer 70, the substrate layer 10, the first compensation layer 60, the conductive layer 30, and the liquid crystal film layer 40 is less than 2 μm. Compared with the phase compensator and the liquid crystal structure being separate, the thickness of the liquid crystal structure in the present application is smaller, which is beneficial to the miniaturization of the device.

[0084] ​Figure 7a is another structural schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiment of the present application. Referring to Figure 7a, the liquid crystal structure with phase compensation function comprises a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the substrate layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 is arranged between the anti-reflection layer 50 and the substrate layer 10, and the second compensation layer 70 is arranged between the substrate layer 10 and the conductive layer 30. The liquid crystal film layer 40 comprises an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as The slow axis of the first compensation layer 60 is oriented as And The included angle between them is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60. The optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the internal and external retardation of the liquid crystal structure with phase compensation function. In order to improve the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with phase compensation function. When the imaging system is prepared, the liquid crystal structure with phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0085] Wherein, the first compensation layer 60 has in-plane birefringence, and the set angle is 85°-95°, that is, the slow axis of the first compensation layer 60 is oriented as And the slow axis of the liquid crystal layer 42 is oriented as The included angle between them is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42.

[0086] Figure 7b is a flow chart of the preparation method of the liquid crystal structure with phase compensation function in Figure 7a, which comprises the following steps:

[0087] S12: preparing the back plate layer and the substrate layer;

[0088] S22: preparing the first compensation layer on the side of the substrate layer away from the back plate layer, and preparing the anti-reflection layer on the side of the first compensation layer away from the substrate layer; ​​

[0089] S32: a second compensation layer is prepared on the side of the base layer facing the back plate layer, and a conductive layer is prepared on the side of the second compensation layer facing away from the base layer;

[0090] S42: a liquid crystal film layer is prepared between the conductive layer and the back plate layer.

[0091] In this embodiment, the lower alignment layer 43 is prepared on the back plate layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on one side of the base layer 10, the slow axis of the second compensation layer 70 is oriented in parallel with the thickness direction of the base layer 10, the conductive layer 30 is prepared on the second compensation layer 70, then the upper alignment layer 41 is prepared according to the first positioning mark 11, then the first compensation layer 60 is prepared on the other side of the base layer 10, and the slow axis of the first compensation layer 60 is oriented in parallel with the thickness direction of the base layer 10. Then the anti-reflection layer 50 is prepared. Finally, the liquid crystal is filled between the upper alignment layer 41 and the lower alignment layer 43 to form the liquid crystal layer 42 by aligning the first positioning mark 11 and the second positioning mark 21 on the base layer 10 and the back plate layer 20, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0092] Figure 8a is another structural schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiment of the application. Referring to Figure 8a, the liquid crystal structure with phase compensation function includes a base layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the base layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the base layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the first compensation layer 60 is arranged between the second compensation layer 70 and the base layer 10, and the second compensation layer 70 is arranged between the first compensation layer 60 and the anti-reflection layer 50. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented in parallel with the thickness direction of the base layer 10. The slow axis of the first compensation layer 60 is oriented in parallel with the thickness direction of the base layer 10. And The included angle between the two layers is a set angle, which enables the in-plane retardation of the liquid crystal film layer 40 to cancel out the in-plane retardation of the first compensation layer 60. The optical axis orientation of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can cancel out the inner and outer surface retardations of the liquid crystal structure with phase compensation function. This improves the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated within the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function to improve the contrast of the liquid crystal structure with phase compensation function. When fabricating an imaging system, there is no need to optically couple the liquid crystal structure with phase compensation function and the compensation sheet, reducing the fabrication complexity of the imaging system, reducing the fabrication time of the imaging system, and reducing costs.

[0093] The first compensation layer 60 has in-plane birefringence and is set at an angle of 85° to 95°, which is the slow axis orientation of the first compensation layer 60. Slow-axis alignment with liquid crystal layer 42 The included angle between them is 85° to 95° to ensure the slow axis orientation of the first compensation layer 60. Slow-axis alignment with liquid crystal layer 42 The layers are orthogonal or nearly orthogonal to compensate for the in-plane delay of the liquid crystal layer 42.

[0094] Figure 8b is a flowchart of the fabrication method of the liquid crystal structure with phase compensation function shown in Figure 8a. The fabrication method includes the following steps:

[0095] S13: Prepare the backsheet layer and substrate layer;

[0096] S23: A first compensation layer is prepared on the side of the base layer away from the backsheet layer, a second compensation layer is prepared on the side of the first compensation layer away from the base layer, and an anti-reflection layer is prepared on the side of the second compensation layer away from the first compensation layer.

[0097] S33: Prepare a conductive layer on the side of the substrate layer facing the backsheet layer;

[0098] S43: Prepare a liquid crystal film layer between the conductive layer and the backsheet layer.

[0099] In the embodiment, the lower alignment layer 43 is prepared on the back plate layer 20 with the second positioning mark 21, the first compensation layer 60 is prepared on one side of the base layer 10 with the first positioning mark 11, the second compensation layer 70 is prepared on the side of the first compensation layer 60 away from the base layer 10, the anti-reflection layer 50 is prepared on the side of the second compensation layer 70 away from the first compensation layer 60, then the conductive layer 30 is prepared on the other side of the base layer 10, the upper alignment layer 41 is prepared on the side of the conductive layer 30 away from the base layer 10 with the first positioning mark 11. Finally, the liquid crystal layer 42 is filled between the upper alignment layer 41 and the lower alignment layer 43 by aligning the first positioning mark 11 and the second positioning mark 21 on the base layer 10 and the back plate layer 20, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0100] In the embodiment, the first compensation layer 60 and the second compensation layer 70 are located between the anti-reflection layer 50 and the base layer 10, so that the liquid crystal layer 42 can be driven by a smaller interval voltage between the base layer 10 and the back plate layer 20. Moreover, the contrast of the liquid crystal structure with phase compensation function can be ensured. In addition, the first compensation layer 60 and the second compensation layer 70 are stacked, and the first compensation layer 60 and the second compensation layer 70 can be regarded as a film layer which has the function of compensating the in-plane retardation and the out-of-plane retardation of the liquid crystal layer 42.

[0101] Figure 9a is another structure diagram of the liquid crystal structure with phase compensation function provided by the embodiment. Referring to Figure 9a, the liquid crystal structure with phase compensation function includes a base layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the base layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the base layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the second compensation layer 70 is arranged between the first compensation layer 60 and the base layer 10, and the first compensation layer 60 is arranged between the second compensation layer 70 and the anti-reflection layer 50. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as The slow axis of the first compensation layer 60 is oriented as and The angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42.

[0102] The first compensation layer 60 and the second compensation layer 70 are located between the anti-reflection layer 50 and the substrate layer 10, so that the liquid crystal layer 42 can be driven by a small interval voltage between the substrate layer 10 and the back plate layer 20, and the contrast of the liquid crystal structure with phase compensation function is ensured. The first compensation layer 60 has in-plane birefringence, and the angle is 85°-95°, that is, the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42. The angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42. The angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42. The angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42. The angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is 85°-95°, which ensures that the slow axis of the first compensation layer 60 is orthogonal or close to orthogonal to the slow axis of the liquid crystal layer 42, so as to compensate the in-plane retardation of the liquid crystal layer 42.

[0103] Fig. 9b is a flow chart of the preparation method of the liquid crystal structure with phase compensation function in Fig. 9a, which comprises the following steps:

[0104] S14: preparing the back plate layer and the substrate layer;

[0105] S24: preparing the second compensation layer on the side of the substrate layer away from the back plate layer, preparing the first compensation layer on the side of the second compensation layer away from the substrate layer, and preparing the anti-reflection layer on the side of the first compensation layer away from the second compensation layer;

[0106] S34: preparing the conductive layer on the side of the substrate layer facing the back plate layer;

[0107] S44: preparing the liquid crystal film layer between the conductive layer and the back plate layer.

[0108] In the embodiment, the lower alignment layer 43 is prepared on the back plate layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on one side of the substrate layer 10, the first compensation layer 60 is prepared on the side of the first compensation layer 60 away from the substrate layer 10 with the first positioning mark 11, the anti-reflection layer 50 is prepared on the side of the first compensation layer 60 away from the second compensation layer 70, then the conductive layer 30 is prepared on the other side of the substrate layer 10, the upper alignment layer 41 is prepared on the side of the conductive layer 30 away from the substrate layer 10 with the first positioning mark 11, finally, the liquid crystal layer 42 is filled between the upper alignment layer 41 and the lower alignment layer 43 by aligning the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20, and the preparation of the liquid crystal structure with the phase compensation function is completed

[0109] Figure 10a is another structure diagram of the liquid crystal structure with the phase compensation function provided by the embodiment of the application. Referring to Figure 10a, the liquid crystal structure with the phase compensation function includes a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70. The first direction is the thickness direction of the substrate layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the second compensation layer 70 is arranged between the first compensation layer 60 and the substrate layer 10, and the side of the first compensation layer 60 away from the second compensation layer 70 is stacked with the conductive layer 30 along the first direction. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as The slow axis of the first compensation layer 60 is oriented as And The included angle between them is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60. The optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the in-plane retardation of the liquid crystal structure with the phase compensation function. To improve the contrast of the liquid crystal structure with the phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with the phase compensation function, that is, the liquid crystal structure with the phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with the phase compensation function. When the imaging system is prepared, the liquid crystal structure with the phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0110] Figure 10b is a flow chart of the preparation method of the liquid crystal structure with the phase compensation function in Figure 10a, which includes the following steps:

[0111] S15: preparing a backplane layer and a substrate layer;

[0112] S25: preparing an anti-reflection layer on the side of the substrate layer away from the backplane layer;

[0113] S35: preparing a second compensation layer on the side of the substrate layer facing the backplane layer, a first compensation layer on the side of the second compensation layer away from the substrate layer, and an electrically conductive layer on the side of the first compensation layer away from the second compensation layer;

[0114] S45: preparing a liquid crystal film layer between the electrically conductive layer and the backplane layer.

[0115] In this embodiment, the lower alignment layer 43 is prepared on the backplane layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on one side of the substrate layer 10, the first compensation layer 60 is prepared on the side of the second compensation layer 70 away from the substrate layer 10 with the first positioning mark 11, the electrically conductive layer 30 is prepared on the side of the first compensation layer 60 away from the second compensation layer 70, the upper alignment layer 41 is prepared on the side of the electrically conductive layer 30 away from the substrate layer 10 with the first positioning mark 11, and then the anti-reflection layer 50 is prepared on the other side of the substrate layer 10. Finally, the liquid crystal is filled between the upper alignment layer 41 and the lower alignment layer 43 to form the liquid crystal layer 42 by aligning the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the backplane layer 20, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0116] FIG. 11a is another structural schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiment of the present application. Referring to FIG. 11a, the liquid crystal structure with phase compensation function includes a substrate layer 10, a backplane layer 20, an electrically conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60, and a second compensation layer 70. The first direction is the thickness direction of the substrate layer 10, the backplane layer 20, the electrically conductive layer 30, the liquid crystal film layer 40, and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the electrically conductive layer 30, the liquid crystal film layer, and the backplane layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the first compensation layer 60 is arranged between the second compensation layer 70 and the substrate layer 10, and along the first direction, the side of the second compensation layer 70 away from the first compensation layer 60 is stacked with the electrically conductive layer 30. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42, and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as the slow axis of the first compensation layer 60 is oriented as and The angle between the two is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60, the optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the in-plane retardation of the liquid crystal structure with phase compensation function. In order to improve the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with phase compensation function. When the imaging system is prepared, the liquid crystal structure with phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0117] Fig. 11b is a flow chart of the preparation method of the liquid crystal structure with phase compensation function in Fig. 11a, which comprises the following steps:

[0118] S16: preparing a back plate layer and a substrate layer;

[0119] S26: preparing an anti-reflection layer on the side of the substrate layer away from the back plate layer;

[0120] S36: preparing a first compensation layer on the side of the substrate layer facing the back plate layer, a second compensation layer on the side of the first compensation layer away from the substrate layer, and a conductive layer on the side of the second compensation layer away from the first compensation layer;

[0121] S46: preparing a liquid crystal film layer between the conductive layer and the back plate layer.

[0122] In this embodiment, the lower orientation layer 43 is prepared on the back plate layer 20 with the second positioning mark 21, the first compensation layer 60 is prepared on one side of the substrate layer 10, the second compensation layer 70 is prepared on the side of the first compensation layer 60 away from the substrate layer 10 with the first positioning mark 11, the conductive layer 30 is prepared on the side of the second compensation layer 70 away from the first compensation layer 60, the upper orientation layer 41 is prepared on the side of the conductive layer 30 away from the substrate layer 10 with the first positioning mark 11, and then the anti-reflection layer 50 is prepared on the other side of the substrate layer 10. Finally, by aligning the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20, the liquid crystal is filled between the upper orientation layer 41 and the lower orientation layer 43 to form a liquid crystal layer 42, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0123] Figure 12a is another schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiments of the present application. Referring to Figure 12a, the liquid crystal structure with phase compensation function includes a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the substrate layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 is arranged between the liquid crystal film layer 40 and the back plate layer 20, and the second inorganic compensation is arranged between the conductive layer 30 and the substrate layer 10. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented between The slow axis of the first compensation layer 60 is oriented between and The included angle between them is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60. The optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the internal and external retardation of the liquid crystal structure with phase compensation function. In order to improve the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function to improve the contrast of the liquid crystal structure with phase compensation function. When the imaging system is prepared, the liquid crystal structure with phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0124] Figure 12b is a flow chart of the preparation method of the liquid crystal structure with phase compensation function in Figure 12a, which includes the following steps:

[0125] S17: preparing the back plate layer and the substrate layer;

[0126] S27: preparing the anti-reflection layer on the side of the substrate layer away from the back plate layer;

[0127] S37: preparing the second compensation layer on the side of the substrate layer facing the back plate layer, and preparing the conductive layer on the side of the second compensation layer away from the substrate layer;

[0128] S47: preparing the first compensation layer on the side of the back plate layer facing the substrate layer;

[0129] S57: preparing the liquid crystal film layer between the conductive layer and the first compensation layer.

[0130] In the embodiment, the first compensation layer 60 is prepared on the back plate layer 20 with the second positioning mark 21, the lower orientation layer 43 is prepared on the side of the first compensation layer 60 away from the back plate layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on one side of the substrate layer 10, the conductive layer 30 is prepared on the side of the second compensation layer 70 away from the substrate layer 10 with the first positioning mark 11, the upper orientation layer 41 is prepared on the side of the conductive layer 30 away from the substrate layer 10 with the first positioning mark 11, and then the anti-reflection layer 50 is prepared on the other side of the substrate layer 10. Finally, the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20 are aligned, the liquid crystal layer 42 is filled between the upper orientation layer 41 and the lower orientation layer 43, and the preparation of the liquid crystal structure with the phase compensation function is completed.

[0131] FIG. 13a is a schematic view of another structure of the liquid crystal structure with the phase compensation function provided by the embodiment of the application. Referring to FIG. 13a, the liquid crystal structure with the phase compensation function includes a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60, and a second compensation layer 70. The first direction is the thickness direction of the substrate layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40, and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer, and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 is arranged between the liquid crystal film layer 40 and the back plate layer 20, and the second inorganic compensation is arranged between the anti-reflection layer 50 and the substrate layer 10. The liquid crystal film layer 40 includes an upper orientation layer 41, a liquid crystal layer 42, and a lower orientation layer 43 which are sequentially stacked. The liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as The slow axis of the first compensation layer 60 is oriented as And The included angle between the slow axis of the first compensation layer 60 and the slow axis of the liquid crystal layer 42 is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60. The optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the in-plane retardation of the liquid crystal structure with the phase compensation function. The contrast of the liquid crystal structure with the phase compensation function is improved. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with the phase compensation function, that is, the liquid crystal structure with the phase compensation function has the compensation function, so as to improve the contrast of the liquid crystal structure with the phase compensation function. When the imaging system is prepared, the liquid crystal structure with the phase compensation function and the compensation sheet do not need to be optically coupled, the preparation complexity of the imaging system is reduced, the preparation time of the imaging system is reduced, and the cost is reduced.

[0132] FIG. 13b is a flow chart of the preparation method of the liquid crystal structure with the phase compensation function in FIG. 13a. The preparation method includes the following steps:

[0133] S18: preparing the back plate layer and the substrate layer;

[0134] S28: preparing a second compensation layer on the side of the base layer away from the back plate layer, and preparing an anti-reflection layer on the side of the second compensation layer away from the base layer;

[0135] S38: preparing a conductive layer on the side of the base layer facing the back plate layer;

[0136] S48: preparing a first compensation layer on the side of the back plate layer facing the base layer;

[0137] S58: preparing a liquid crystal film layer between the conductive layer and the first compensation layer.

[0138] In this embodiment, the first compensation layer 60 is prepared on the back plate layer 20 with the second positioning mark 21, the lower alignment layer 43 is prepared on the side of the first compensation layer 60 away from the back plate layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on one side of the base layer 10, the anti-reflection layer 50 is prepared on the side of the second compensation layer 70 away from the base layer 10, then the conductive layer 30 is prepared on the other side of the base layer 10, the upper alignment layer 41 is prepared on the side of the conductive layer 30 away from the base layer 10 with the first positioning mark 11. Finally, by aligning the first positioning mark 11 and the second positioning mark 21 on the base layer 10 and the back plate layer 20, the liquid crystal is filled between the upper alignment layer 41 and the lower alignment layer 43 to form the liquid crystal layer 42, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0139] FIG. 14a is another structural schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiment of the present application. Referring to FIG. 14a, the liquid crystal structure with phase compensation function includes a base layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the base layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the base layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the first compensation layer 60 is arranged between the second compensation layer 70 and the back plate layer 20, and along the first direction, the side of the second compensation layer 70 away from the first compensation layer 60 is stacked with the liquid crystal film layer 40. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as the slow axis of the first compensation layer 60 is oriented as and The included angle between the first direction and the second direction is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60, the optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the in-plane retardation of the liquid crystal structure with the phase compensation function. In this way, the contrast of the liquid crystal structure with the phase compensation function is improved. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with the phase compensation function, that is, the liquid crystal structure with the phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with the phase compensation function. When the imaging system is prepared, the liquid crystal structure with the phase compensation function and the compensation sheet do not need to be optically coupled, the preparation complexity of the imaging system is reduced, the preparation time of the imaging system is reduced, and the cost is reduced.

[0140] FIG. 14b is a flowchart of a preparation method of the liquid crystal structure with the phase compensation function in FIG. 14a, which comprises the following steps:

[0141] S19: preparing a back plate layer and a substrate layer;

[0142] S29: preparing an anti-reflection layer on a side of the substrate layer away from the back plate layer;

[0143] S39: preparing a conductive layer on a side of the substrate layer toward the back plate layer;

[0144] S49: preparing a first compensation layer on a side of the back plate layer toward the substrate layer, preparing a second compensation layer on a side of the first compensation layer toward the substrate layer, and preparing a liquid crystal film layer between the second compensation layer and the conductive layer.

[0145] In this embodiment, the first compensation layer 60 is prepared on the back plate layer 20 with the second positioning mark 21, the second compensation layer 70 is prepared on a side of the first compensation layer 60 away from the back plate layer 20, the lower alignment layer 43 is prepared on a side of the second compensation layer 70 away from the first compensation layer 60 with the second positioning mark 21, the anti-reflection layer 50 is prepared on one side of the substrate layer 10, then the conductive layer 30 is prepared on the other side of the substrate layer 10, and the upper alignment layer 41 is prepared on a side of the conductive layer 30 away from the substrate layer 10 with the first positioning mark 11. Finally, the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20 are aligned, the liquid crystal is filled between the upper alignment layer 41 and the lower alignment layer 43 to form the liquid crystal layer 42, and the preparation of the liquid crystal structure with the phase compensation function is completed.

[0146] Figure 15a is another schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiments of the present application. Referring to Figure 15a, the liquid crystal structure with phase compensation function includes a substrate layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the substrate layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the substrate layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 and the second compensation layer 70 are also stacked, the first compensation layer 60 is arranged between the second compensation layer 70 and the liquid crystal film layer 40, and along the first direction, the side of the second compensation layer 70 away from the first compensation layer 60 is stacked with the back plate layer 20. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented between the slow axis of the first compensation layer 60 is oriented between and the included angle between them is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60, the optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the internal and external retardation of the liquid crystal structure with phase compensation function. In order to improve the contrast of the liquid crystal structure with phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with phase compensation function, that is, the liquid crystal structure with phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with phase compensation function. When the imaging system is prepared, the liquid crystal structure with phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0147] Figure 15b is a flow chart of the preparation method of the liquid crystal structure with phase compensation function in Figure 15a, which includes the following steps:

[0148] S190: preparing the back plate layer and the substrate layer;

[0149] S290: preparing the anti-reflection layer on the side of the substrate layer away from the back plate layer;

[0150] S390: preparing the conductive layer on the side of the substrate layer facing the back plate layer;

[0151] S490: preparing the second compensation layer on the side of the back plate layer facing the substrate layer, preparing the first compensation layer on the side of the second compensation layer facing the substrate layer, and preparing the liquid crystal film layer between the first compensation layer and the conductive layer.

[0152] In the embodiment, the second compensation layer 70 is prepared on the back plate layer 20, the first compensation layer 60 is prepared on the side of the second compensation layer 70 away from the back plate layer 20 with the second positioning mark 21, the lower orientation layer 43 is prepared on the side of the first compensation layer 60 away from the second compensation layer 70 with the second positioning mark 21, the anti-reflection layer 50 is prepared on one side of the base layer 10, then the conductive layer 30 is prepared on the other side of the base layer 10, the upper orientation layer 41 is prepared on the side of the conductive layer 30 away from the base layer 10 with the first positioning mark 11. Finally, the first positioning mark 11 and the second positioning mark 21 on the base layer 10 and the back plate layer 20 are aligned, the liquid crystal layer 42 is filled between the upper orientation layer 41 and the lower orientation layer 43, and the preparation of the liquid crystal structure with the phase compensation function is completed.

[0153] FIG. 16a is another structural schematic diagram of the liquid crystal structure with the phase compensation function provided by the embodiment of the application. Referring to FIG. 16a, the liquid crystal structure with the phase compensation function includes a base layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; a first direction is the thickness direction of the base layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the base layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 is arranged between the conductive layer 30 and the base layer 10, and the second inorganic compensation is arranged between the back plate layer 20 and the liquid crystal film layer 40. The liquid crystal film layer 40 includes an upper orientation layer 41, a liquid crystal layer 42 and a lower orientation layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as the slow axis of the first compensation layer 60 is oriented as and the included angle between them is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60, the optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the internal and external in-plane retardation of the liquid crystal structure with the phase compensation function. In order to improve the contrast of the liquid crystal structure with the phase compensation function. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with the phase compensation function, that is, the liquid crystal structure with the phase compensation function has a compensation function, so as to improve the contrast of the liquid crystal structure with the phase compensation function. When the imaging system is prepared, the liquid crystal structure with the phase compensation function and the compensation sheet do not need to be optically coupled, which reduces the preparation complexity of the imaging system, reduces the preparation time of the imaging system, and reduces the cost.

[0154] FIG. 16b is a flow chart of the preparation method of the liquid crystal structure with the phase compensation function in FIG. 16a, which includes the following steps:

[0155] S191: preparing a back plate layer and a base layer;

[0156] S291: preparing an anti-reflection layer on the side of the base layer away from the back plate layer;

[0157] S391: preparing a first compensation layer on the side of the base layer facing the back plate layer, and preparing a conductive layer on the side of the first compensation layer away from the base layer;

[0158] S491: preparing a second compensation layer on the side of the back plate layer facing the base layer, and preparing a liquid crystal film layer between the second compensation layer and the conductive layer.

[0159] In this embodiment, the second compensation layer 70 is prepared on the back plate layer 20, the lower alignment layer 43 is prepared on the side of the second compensation layer 70 away from the back plate layer 20 with the second positioning mark 21, the anti-reflection layer 50 is prepared on one side of the base layer 10, then the first compensation layer 60 is prepared on the other side of the base layer 10 with the first positioning mark 11, the conductive layer 30 is prepared on the side of the first compensation layer 60 away from the base layer 10, the upper alignment layer 41 is prepared on the side of the conductive layer 30 away from the base layer 10 with the first positioning mark 11. Finally, the liquid crystal layer 42 is filled between the upper alignment layer 41 and the lower alignment layer 43 by aligning the first positioning mark 11 and the second positioning mark 21 on the base layer 10 and the back plate layer 20, and the preparation of the liquid crystal structure with phase compensation function is completed.

[0160] FIG. 17a is another structural schematic diagram of the liquid crystal structure with phase compensation function provided by the embodiment of the present application. Referring to FIG. 17a, the liquid crystal structure with phase compensation function includes a base layer 10, a back plate layer 20, a conductive layer 30, a liquid crystal film layer 40, an anti-reflection layer 50, a first compensation layer 60 and a second compensation layer 70; the first direction is the thickness direction of the base layer 10, the back plate layer 20, the conductive layer 30, the liquid crystal film layer 40 and the anti-reflection layer 50. The anti-reflection layer 50, the base layer 10, the conductive layer 30, the liquid crystal film layer and the back plate layer 20 are sequentially stacked along the first direction. The first compensation layer 60 is arranged between the anti-reflection layer 50 and the base layer 10, and the second inorganic compensation is arranged between the back plate layer 20 and the liquid crystal film layer 40. The liquid crystal film layer 40 includes an upper alignment layer 41, a liquid crystal layer 42 and a lower alignment layer 43 which are sequentially stacked, the liquid crystal layer 42 has a slow axis, and the slow axis of the liquid crystal layer 42 is oriented as The slow axis of the first compensation layer 60 is oriented as And The included angle between the first direction and the second direction is a set angle, which can offset the in-plane retardation of the liquid crystal film layer 40 and the in-plane retardation of the first compensation layer 60, the optical axis of the second compensation layer 70 is parallel to the first direction, and the second compensation layer 70 can offset the in-plane retardation of the liquid crystal structure with the phase compensation function. Thus, the contrast of the liquid crystal structure with the phase compensation function is improved. In addition, the first compensation layer 60 and the second compensation layer 70 are integrated in the liquid crystal structure with the phase compensation function, that is, the liquid crystal structure with the phase compensation function has the compensation function, so as to improve the contrast of the liquid crystal structure with the phase compensation function. When the imaging system is prepared, the liquid crystal structure with the phase compensation function and the compensation sheet do not need to be optically coupled, the preparation complexity of the imaging system is reduced, the preparation time of the imaging system is reduced, and the cost is reduced.

[0161] FIG. 17b is a flowchart of a preparation method of the liquid crystal structure with the phase compensation function in FIG. 17a, which comprises the following steps:

[0162] S192: preparing a back plate layer and a substrate layer;

[0163] S292: preparing a first compensation layer on a side of the substrate layer away from the back plate layer, and preparing an anti-reflection layer on a side of the first compensation layer away from the substrate layer;

[0164] S392: preparing a conductive layer on a side of the substrate layer facing the back plate layer;

[0165] S492: preparing a second compensation layer on a side of the back plate layer facing the substrate layer, and preparing a liquid crystal film layer between the second compensation layer and the conductive layer.

[0166] In the embodiment, the second compensation layer 70 is prepared on the back plate layer 20, the lower alignment layer 43 is prepared on a side of the second compensation layer 70 away from the back plate layer 20 with the second positioning mark 21, the first compensation layer 60 is prepared on one side of the substrate layer 10 with the first positioning mark 11, the anti-reflection layer 50 is prepared on a side of the first compensation layer 60 away from the substrate layer 10, the conductive layer 30 is prepared on the other side of the substrate layer 10, and then the upper alignment layer 41 is prepared on a side of the conductive layer 30 away from the substrate layer 10 with the first positioning mark 11. Finally, the first positioning mark 11 and the second positioning mark 21 on the substrate layer 10 and the back plate layer 20 are aligned, the liquid crystal is filled between the upper alignment layer 41 and the lower alignment layer 43 to form the liquid crystal layer 42, and the preparation of the liquid crystal structure with the phase compensation function is completed.

[0167] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope and spirit of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. A liquid crystal structure with phase compensation function, characterized in that, The liquid crystal structure with phase compensation function comprises a substrate layer, a back plate layer, a conductive layer, a liquid crystal film layer, an anti-reflection layer, a first compensation layer and a second compensation layer. The anti-reflection layer, the substrate layer, the conductive layer, the liquid crystal film layer and the back plate layer are sequentially stacked along a first direction, the first compensation layer is arranged between any two adjacent layers, the second compensation layer is arranged between any two adjacent layers, and the first direction is the thickness direction of the anti-reflection layer, the substrate layer, the conductive layer, the liquid crystal film layer and the back plate layer. The first compensation layer is used for compensating the in-plane retardation of the liquid crystal film layer, and the second compensation layer is used for compensating the out-of-plane retardation of the liquid crystal film layer. The liquid crystal film layer comprises an upper alignment layer, a liquid crystal layer and a lower alignment layer, the liquid crystal layer is located between the upper alignment layer and the lower alignment layer, and the lower alignment layer is close to the back plate layer.

2. The liquid crystal structure having a phase compensation function according to claim 1, wherein, The included angle between the slow axis of the second compensation layer and the first direction is a set angle. The slow axis of the liquid crystal layer is oriented at an angle of 45° to the alignment direction of the liquid crystal layer the slow axis of the first compensation layer is oriented The and said The slow axis of the second compensation layer is parallel to the first direction. The set angle is 85°-95°.

3. The liquid crystal structure having a phase compensation function according to claim 2, wherein, The first compensation layer and the second compensation layer are arranged in a stack, the first compensation layer is arranged on the side of the substrate layer away from the conductive layer, and the second compensation layer is arranged between the first compensation layer and the anti-reflection layer.

4. The liquid crystal structure having a phase compensation function according to claim 2 or 3, characterized by The first compensation layer and the second compensation layer are arranged in a stack, the second compensation layer is arranged on the side of the substrate layer away from the conductive layer, and the first compensation layer is arranged between the second compensation layer and the anti-reflection layer.

5. The liquid crystal structure having a phase compensation function according to claim 2 or 3, wherein The substrate layer comprises at least one first positioning mark, and the first positioning mark is used for defining the groove orientation of upper grooves included in the upper alignment layer in a production stage.

6. The liquid crystal structure having a phase compensation function according to any one of claims 2 to 5, wherein The at least one first positioning mark is used for making a rubbing member rub the surface of the upper alignment layer in a specific direction, so that the upper alignment layer forms a plurality of parallel arranged upper grooves.

7. The liquid crystal structure having a phase compensation function according to claim 6, wherein The at least one first positioning mark forms a first planar rectangular coordinate system on the surface of the base layer, and the upper orientation layer comprises a plurality of parallel upper grooves, and the included angle between the groove orientation of the plurality of upper grooves and the X axis of the first planar rectangular coordinate system is 0°<θ<90°.

8. The liquid crystal structure having a phase compensation function according to claim 6, wherein, The back plate layer comprises at least one second positioning mark, and the second positioning mark is used for defining the groove orientation of lower grooves included in the lower alignment layer in a production stage, the second positioning mark corresponds to the first positioning mark, and is used for aligning and packaging the substrate layer and the back plate layer.

9. The liquid crystal structure having a phase compensation function according to any one of claims 6 to 8, wherein The first compensation layer is a tilted deposited thin film, or the first compensation layer is a one-dimensional subwavelength grating; and the second compensation layer is an alternating deposited thin film.

10. The liquid crystal structure having a phase compensation function according to claim 9, wherein, The at least one second positioning mark forms a second planar coordinate system on the surface of the back plate layer, the lower orientation layer comprises a plurality of parallel lower grooves, and the included angle between the projection of the back plate layer and the X axis of the second planar coordinate system is In the first direction, the first and second planar coordinate systems coincide, and in the projection of the first or second planar coordinate system, the slow axis of the liquid crystal layer is oriented the value range of said with the The liquid crystal structure with phase compensation function comprises a polarizer, a polarization beam splitter, a polarizing plate and the liquid crystal structure with phase compensation function according to any one of claims 1-12, the polarization beam splitter is located between the polarizer and the liquid crystal structure with phase compensation function, the polarizing plate is located on one side of the liquid crystal structure with phase compensation function, and the polarizing plate extends along the thickness direction of the liquid crystal structure with phase compensation function, after the light passes through the polarizer and the polarization beam splitter, the light is converted into linearly polarized light, the linearly polarized light enters the liquid crystal structure with phase compensation function, the liquid crystal layer in the liquid crystal structure with phase compensation function keeps or changes the polarization state of the linearly polarized light, and the linearly polarized light is reflected by the polarization beam splitter into the polarizing plate or transmitted into the polarizer.

11. The liquid crystal structure having a phase compensation function according to any one of claims 6 to 10, wherein the first positioning mark or the second positioning mark is used to define a slow axis orientation of the first compensation layer of the production stage 12. The liquid crystal structure having a phase compensation function according to claim 11, wherein, ​ 13. An imaging system characterized by, ​ 14. A method of manufacturing a liquid crystal structure with phase compensation function according to any one of claims 1 to 12, characterized in that, comprising the steps of: manufacturing a backplane layer and a substrate layer; manufacturing a liquid crystal structure comprising a first compensation layer, a second compensation layer, a conductive layer, a liquid crystal film layer, and an anti-reflection layer based on the backplane layer and / or the substrate layer, wherein the first compensation layer and the second compensation layer are located between the anti-reflection layer and the backplane layer.

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