Quick-response black and white reflective liquid crystal display and preparation method thereof

Abstract

The invention provides a quick-response black and white reflective liquid crystal display and a preparation method thereof. Preparing a transparent microstructure array on the first conductive layer of the first transparent conductive substrate; the transparent microstructure array is formed by arranging a plurality of transparent microstructure units in an array manner to form an uneven surface; coating and curing a vertical orientation agent on the convex surface of the transparent microstructure unit to form a first alignment layer; preparing a liquid crystal inner cavity of the liquid crystal layer by using a frame and a plurality of spacing columns, and reserving a crystal filling port; coating and curing a vertical orientation agent on the second conductive layer of the second transparent conductive substrate to form a second alignment layer; closing the first transparent conductive base material and the second transparent conductive base material; cholesteric liquid crystal is poured into each display area from the reserved crystal pouring opening, the primer layer is coated with a lightproof black ink layer, and an IC and an FPC are pressed. The quick-response black and white reflective liquid crystal display has the advantages of broadening the reflection spectrum, widening the visual angle, being low in cost, low in power consumption, ultra-light and ultra-thin and the like.

Description

Technical Field

[0001] The present application belongs to the technical field of liquid crystal display devices, and more specifically, to a fast-response black-and-white reflective liquid crystal display and a preparation method thereof. Background Art

[0002] Thin-film transistor-liquid crystal displays (TFT-LCDs) include transmissive liquid crystal displays and reflective liquid crystal displays. Transmissive liquid crystal displays were developed first, including a backlight built into the back of the display and a display electrode using a transparent conductive material such as ITO (Indiµm Tin Oxides). However, the backlight used in the transmissive liquid crystal display is the component with the highest power consumption, and must be supplied by a battery, which has the disadvantage of high power consumption. In addition, when the transmissive liquid crystal display is used outdoors, especially in sunlight, it will produce glare, which will reduce the display contrast, so that the image display is not clear. Reflective liquid crystal displays came into being. Its light source is an external natural light source or an artificial light source, so a reflective layer is required to reflect the external light. Traditionally, the display electrode is used as the reflective layer. The material used for the display electrode is a conductive material that reflects the external light, usually metal aluminum. The surface of the display electrode is set to an uneven surface to increase the reflection effect of light.

[0003] Among liquid crystal displays, the traditional twisted nematic (TN) type liquid crystal displays are the most widely used, and most of them are single-area structures. However, the common reflective and transflective liquid crystal displays are mostly RTN (reflective twisted nematic) LCDs and MTN-LCDs (Mixed mode TN-LCDs), which require orthogonal polarizers and compensation films on the outside of the liquid crystal display, which leads to inherent defects in the viewing angle of the transmissive mode. The viewing angle is about 40 degrees on the left and right, and about 30 degrees on the top and bottom. In addition, the contrast is very low, only about 15:1 to 50:1, and the dispersion is poor, so it is difficult to apply it to high-quality products. In addition, the directional friction technology used in the manufacturing process has more problems with static electricity prevention and dust pollution. Therefore, designing a liquid crystal display that can simply and efficiently achieve the needs of power saving and anti-glare has become an urgent problem to be solved in the industry. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a fast-response black-and-white reflective liquid crystal display and a method for preparing the same, so as to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is to provide a fast-response black-and-white reflective liquid crystal display, comprising: A first transparent conductive substrate, comprising a first transparent substrate and a first conductive layer; The second transparent conductive substrate comprises a second transparent substrate and a second conductive layer; the first transparent substrate and the second transparent substrate are arranged opposite to each other with a spacing, the first conductive layer is arranged on a side of the first transparent substrate facing the second transparent substrate, and the second conductive layer is arranged opposite to the first conductive layer; The liquid crystal layer is located between the first transparent conductive substrate and the second transparent conductive substrate; the liquid crystal cavity of the liquid crystal layer is divided into a plurality of display areas, and each display area is filled with cholesteric liquid crystal; A transparent microstructure array is provided on the first conductive layer, and includes a plurality of transparent microstructure units arranged in an array, wherein each display area is provided with a transparent microstructure unit, and the transparent microstructure unit is provided in a transparent convex shape protruding toward the second conductive layer; The alignment layer comprises a first alignment layer and a second alignment layer having a vertically oriented orientation agent, wherein the first alignment layer is arranged on a convex surface of the transparent microstructure unit facing the second conductive layer, and the second alignment layer is sandwiched between the liquid crystal layer and the second conductive layer; The primer layer is arranged on the side of the first transparent substrate facing away from the second transparent substrate, and an opaque black ink layer is arranged on the primer layer.

[0006] Optionally, the fast response black and white reflective liquid crystal display further comprises a frame and spacer columns, two ends of the frame respectively support and connect the first conductive layer and the second alignment layer; the frame encloses to form a liquid crystal cavity; Two ends of the spacer column respectively support and connect the first conductive layer and the second alignment layer. A plurality of spacer columns are located in the liquid crystal cavity to divide the liquid crystal cavity into a plurality of display areas isolated from each other.

[0007] Optionally, the spacer column is made of positive polyacrylate or negative polyacrylate, and the cross-section of the spacer column is in the shape of a square, a circle, or a strip.

[0008] Optionally, the material of the transparent microstructure unit is one of polyacrylate, epoxy acrylate resin, and polyimide acrylate, and is made by one of transfer, nanoimprinting, photolithography, and inkjet printing; the cross-section of the transparent microstructure unit is one of circular, square, and hexagonal.

[0009] Optionally, the first conductive layer is made of indium tin oxide or nanowires, and a distance between the first conductive layer and the second conductive layer is 3µm to 6µm.

[0010] The present application also proposes a method for preparing a fast-response black-and-white reflective liquid crystal display, which is used to prepare the fast-response black-and-white reflective liquid crystal display as described above; the method for preparing a fast-response black-and-white reflective liquid crystal display comprises the following steps: A transparent microstructure array is prepared on the first conductive layer of the first transparent conductive substrate; the transparent microstructure array is composed of a plurality of transparent microstructure units arranged in an array to form an uneven surface; Coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit to form a first alignment layer; A liquid crystal cavity of a liquid crystal layer is prepared by using a frame and a plurality of spacers, and a crystal filling port is reserved; coating and curing a vertically oriented orientation agent on the second conductive layer of the second transparent conductive substrate to form a second alignment layer; Molding a first transparent conductive substrate provided with a transparent microstructure array and a first alignment layer and a second transparent conductive substrate provided with a second alignment layer; Cholesteric liquid crystal is poured into each display area from the reserved crystal filling port, an opaque black ink layer is coated on the primer layer, and the IC and FPC are pressed.

[0011] Optionally, before the step of preparing a transparent microstructure array on the first conductive layer of the first transparent conductive substrate, the following steps are also included: According to the preset dot matrix and pixel specifications, pixels are etched on the first conductive layer and the second conductive layer to form a pattern or dot matrix consistent with the display area.

[0012] Optionally, the step of preparing a transparent microstructure array on the first conductive layer of the first transparent conductive substrate includes the following sub-steps: spin coating an epoxy acrylate material on the first conductive layer; Using a transfer plate with microstructures, pressing out a preparation of a desired transparent microstructure array; The preparation of the bright microstructure array is cured by ultraviolet light curing to form a transparent microstructure array.

[0013] Optionally, the step of coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit to form a first alignment layer includes the following sub-steps: Spin coating a VA type vertical alignment agent on the convex surface of the transparent microstructure unit to form a preparation of a first alignment layer; The preparation of the first alignment layer is heated and cured without being rubbed for orientation, so as to form the first alignment layer; The step of coating and curing a vertically oriented orientation agent on the second conductive layer of the second transparent conductive substrate to form a second alignment layer comprises the following sub-steps:; Spin coating a VA type vertical alignment agent on the second conductive layer to form a preparation of the second conductive layer; The preparation for the second alignment layer is heated and cured without being rubbed and aligned to form the second alignment layer.

[0014] Optionally, before the step of combining the first transparent conductive substrate provided with the transparent microstructure array and the first alignment layer and the second transparent conductive substrate provided with the second alignment layer into a mold, the following sub-steps are also included: Spin coating a negative photoresist material on the surface of the first conductive layer; The first conductive layer is exposed and developed, and the height of the photoresist material is adjusted to ensure that the spacing between the first alignment layer and the second conductive layer is in the range of 3µm to 5µm.

[0015] The beneficial effects of the fast response black and white reflective liquid crystal display and its preparation method provided by the present application are: first, since the fast response black and white reflective liquid crystal display uses cholesteric liquid crystal with its own color as the display material, it can omit components such as polarizers, and also omit the directional friction process of the orientation layer, so that the device structure of the liquid crystal display is simpler, the cost is lower and it is ultra-light and thin; secondly, the viewing angle range of the fast response black and white reflective liquid crystal display is more than 160 degrees, the sum of the rising and falling response time during grayscale display is less than 30 milliseconds, and there is no color deviation; thirdly, the transparent microstructure array is used in conjunction with the vertical directional orientation agent on the alignment layer to effectively broaden the reflection spectrum of the cholesteric liquid crystal, thereby achieving a black and white effect. In summary, the fast response black and white reflective liquid crystal display directly uses cholesteric liquid crystal as the display material, and uses a transparent microstructure array composed of multiple transparent microstructure units to make an uneven surface, and then uses the anchoring effect of the vertical directional orientation agent of the alignment layer, so that it has the advantages of broadening the reflection spectrum, widening the viewing angle, low cost, low power consumption and ultra-light and thin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic cross-sectional structure diagram of a single-layer liquid crystal cell architecture provided in an embodiment of the present application; Figure 2 A flow chart of a method for preparing a fast-response black-and-white reflective liquid crystal display provided in an embodiment of the present application.

[0018] Description of Figure Numbers: DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should also be noted that the directional terms such as left, right, up and down in the embodiments of the present application are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] The embodiments of the present application provide a fast-response black-and-white reflective liquid crystal display.

[0027] See also Figure 1 In one embodiment, the fast response black and white reflective liquid crystal display comprises a first transparent conductive substrate, a second transparent conductive substrate, a liquid crystal layer 200, a transparent microstructure array, an alignment layer and a primer layer 500. Specifically, the first transparent conductive substrate comprises a first transparent substrate 110 and a first conductive layer 120; the second transparent conductive substrate comprises a second transparent substrate 130 and a second conductive layer 420; the first transparent substrate 110 and the second transparent substrate 130 are arranged relatively spaced apart, the first conductive layer 120 is arranged on the side of the first transparent substrate 110 facing the second transparent substrate 130, and the second conductive layer 420 is arranged opposite to the first conductive layer 120. The liquid crystal layer 200 is located between the first transparent conductive substrate and the second transparent conductive substrate; the liquid crystal cavity of the liquid crystal layer 200 is divided into a plurality of display areas 210, and each display area 210 is filled with cholesteric liquid crystal. The transparent microstructure array is disposed on the first conductive layer 120, and includes a plurality of transparent microstructure units 310 arranged in an array. A transparent microstructure unit 310 is disposed in each display area 210, and the transparent microstructure unit 310 is disposed in a transparent convex shape protruding toward the second conductive layer 420. The alignment layer includes a first alignment layer 410 and a second alignment layer 140 having a vertically oriented orientation agent. The first alignment layer 410 is disposed on the convex surface of the transparent microstructure unit 310 facing the second conductive layer 420, and the second alignment layer 140 is sandwiched between the liquid crystal layer 200 and the second conductive layer 420. The primer layer 500 is disposed on the side of the first transparent substrate 110 away from the second transparent substrate 130, and an opaque black ink layer is disposed on the primer layer 500.

[0028] It should be noted that the display material in the technical solution of the present application uses cholesteric liquid crystal, which is a chiral nematic liquid crystal with bistable characteristics. In the normal state, it is colorless and nearly transparent. Since the primer layer 500 is opaque black, a black background is presented at this time. Under the condition of sufficient electric field force, the liquid crystal molecules are tilted along the microstructure surface, which is the display state, that is, the liquid crystal is in a reflective state when powered on, and under the anchoring effect of the transparent microstructure unit 310, the reflection spectrum is broadened, and then it appears white, and contrast appears.

[0029] Based on this design, in this embodiment, the fast response black and white reflective liquid crystal display has the following advantages: first, since the fast response black and white reflective liquid crystal display uses cholesteric liquid crystal with its own color as the display material, it can omit components such as polarizers, and also omit the directional rubbing process of the alignment layer, so that the device structure of the liquid crystal display is simpler, the cost is lower and it is ultra-light and thin; secondly, the viewing angle range of the fast response black and white reflective liquid crystal display is more than 160 degrees, the sum of the rising and falling response time during grayscale display is less than 30 milliseconds, and there is no color deviation; thirdly, the transparent microstructure array is used in conjunction with the vertical directional orientation agent on the alignment layer to effectively broaden the reflection spectrum of the cholesteric liquid crystal, thereby achieving a black and white effect. In summary, the fast response black and white reflective liquid crystal display directly uses cholesteric liquid crystal as the display material, and uses a transparent microstructure array composed of multiple transparent microstructure units 310 to make an uneven surface, and then uses the anchoring effect of the vertical directional orientation agent of the alignment layer, so as to have the advantages of broadening the reflection spectrum, widening the viewing angle, low cost, low power consumption and ultra-light and thin.

[0030] See also Figure 1 , the fast response black and white reflective liquid crystal display also includes a frame 220 and a spacer 230, the two ends of the frame 220 respectively support and connect the first conductive layer 120 and the second alignment layer 140; the frame 220 encloses and forms a liquid crystal cavity. The two ends of the spacer 230 respectively support and connect the first conductive layer 120 and the second alignment layer 140, and a plurality of spacers 230 are located in the liquid crystal cavity to separate the liquid crystal cavity into a plurality of mutually isolated display areas 210. Specifically in this embodiment, the spacers 230 are preferably evenly distributed, and their density range is preferably 60 to 220 per square centimeter, and the surrounding is filled with chiral nematic liquid crystals, specifically cholesteric liquid crystals, and the thickness range is preferably 4µm. In addition, the first alignment layer 410 and the second alignment layer 140 use a vertically aligned vertical orientation agent, so there is no friction. The thickness of the first transparent substrate 110 and the first transparent substrate 110 is preferably 0.7mm.

[0031] It should be noted that the spacer column 230 is preferably made of positive polyacrylate or negative polyacrylate, and the cross-section of the spacer column 230 is square, circular, or rectangular, with a diameter of preferably 10µm to 20µm, and the spacing between two adjacent spacer columns 230 is 200µm to 600µm.

[0032] It should be noted that the material of the transparent microstructure unit 310 is preferably one of polyacrylate, epoxy acrylate resin, and polyimide acrylate, and is made by a method of transfer, nanoimprinting, photolithography, and inkjet printing. The cross-sectional shape of the transparent microstructure unit 310 is one of circular, square, and hexagonal. Figure 1As shown, in this embodiment, the cross-section of the transparent microstructure unit 310 is circular, and its thickness is preferably 0.1 μm to 1 μm.

[0033] Furthermore, the first conductive layer 120 is made of indium tin oxide or nanowires, and the distance between the first conductive layer 120 and the second conductive layer 420 is preferably 3 μm to 6 μm.

[0034] The present application also proposes a method for preparing a fast-response black-and-white reflective liquid crystal display, which is used to prepare the fast-response black-and-white reflective liquid crystal display as described above. Figure 2 In this embodiment, the method for preparing a fast response black and white reflective liquid crystal display comprises the following steps: S1, preparing a transparent microstructure array on the first conductive layer 120 of the first transparent conductive substrate; the transparent microstructure array is composed of a plurality of transparent microstructure units 310 arranged in an array to form an uneven surface; S2, coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit 310 to form a first alignment layer 410; S3, using the frame 220 and a plurality of spacers 230 to prepare a liquid crystal cavity of the liquid crystal layer 200, and reserving a crystal filling port; Specifically, there may be one or more wafer filling ports reserved on the frame 220 glue, which are set according to specific needs.

[0035] S4, coating and curing a vertically oriented orientation agent on the second conductive layer 420 of the second transparent conductive substrate to form a second alignment layer 140; S5, combining the first transparent conductive substrate provided with the transparent microstructure array and the first alignment layer 410 and the second transparent conductive substrate provided with the second alignment layer 140 into a mold; Specifically, the first transparent conductive substrate and the second transparent conductive substrate are molded together by precise bonding to form a liquid crystal cell.

[0036] S6 , injecting cholesteric liquid crystal into each display area 210 from the reserved injection port, coating an opaque black ink layer on the primer layer 500 , and pressing the IC and FPC.

[0037] Specifically, when pouring liquid crystal into the liquid crystal box through the filling port, it is necessary to heat the pouring. Black ink is printed on the bottom of the primer layer 500, and then an IC (Integrated Circuit) and an FPC (Flexible Printed Circuit) are attached to produce a fast response black and white reflective liquid crystal display.

[0038] The fast-response black-and-white reflective liquid crystal display manufactured by the fast-response black-and-white reflective liquid crystal display preparation method directly uses cholesteric liquid crystal as a display material, and uses a transparent microstructure array composed of multiple transparent microstructure units 310 to make an uneven surface, and then uses the anchoring effect of the vertical directional orientation agent of the alignment layer, so that it has the advantages of broadening the reflection spectrum, widening the viewing angle, low cost, low power consumption and ultra-lightness.

[0039] Furthermore, in this embodiment, before the step of preparing a transparent microstructure array on the first conductive layer 120 of the first transparent conductive substrate, the following steps are also included: According to the preset dot matrix and pixel specifications, pixels are etched on the first conductive layer 120 and the second conductive layer 420 to form a pattern or dot matrix consistent with the display area 210 .

[0040] Specifically, the dot matrix size and the number of pixels of the display device can be determined according to the customer's needs for display content, that is, a preset dot matrix and pixel specification can be formed, and then the pixels are etched to form a pattern or dot matrix. Here, the first conductive layer 120 and the second conductive layer 420 are made of ITO conductive film glass.

[0041] Furthermore, in this embodiment, the step of preparing a transparent microstructure array on the first conductive layer 120 of the first transparent conductive substrate includes the following sub-steps: Spin coating epoxy acrylate material on the first conductive layer 120; Using a transfer plate with microstructures, pressing out a preparation of a desired transparent microstructure array; The preparation of the bright microstructure array is cured by ultraviolet light curing to form a transparent microstructure array.

[0042] Specifically, the thickness of the transfer plate is preferably 0.3±0.02µm, the illumination energy of the ultraviolet light is preferably 3000mJ, and the curing energy of the transparent microstructure array is preferably 2000~10000mJ.

[0043] Furthermore, in this embodiment, the step of coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit 310 to form the first alignment layer 410 includes the following sub-steps: Spin coating a VA type vertical alignment agent on the convex surface of the transparent microstructure unit 310 to form a preparation of the first alignment layer 410; The preparation of the first alignment layer 410 is heated and cured without being rubbed and oriented to form the first alignment layer 410 ; The step of coating and curing a vertically oriented orientation agent on the second conductive layer 420 of the second transparent conductive substrate to form the second alignment layer 140 includes the following sub-steps:; Spin coating a VA type vertical alignment agent on the second conductive layer 420 to form a preparation of the second alignment layer 140; The preparation of the second alignment layer 140 is heated and cured without being rubbed and aligned to form the second alignment layer 140 .

[0044] Specifically, the spin coating thickness of the vertical orientation agent is preferably 400 Å, and the vertical orientation agent can be, but is not limited to, one of VA type vertical orientation agents such as DL-4010, DL-4018, and DL-4022.

[0045] Furthermore, in this embodiment, before the step of combining the first transparent conductive substrate provided with the transparent microstructure array and the first alignment layer 410 and the second transparent conductive substrate provided with the second alignment layer 140 into a mold, the following sub-steps are also included: Spin coating a negative photoresist material on the surface of the first conductive layer 120; The first conductive layer 120 is exposed and developed, and the height of the photoresist material is adjusted to ensure that the spacing between the first alignment layer 410 and the second conductive layer 420 is in the range of 3 μm to 5 μm.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fast response black and white reflective liquid crystal display, characterized in that: include: A first transparent conductive substrate, comprising a first transparent substrate and a first conductive layer; A second transparent conductive substrate, comprising a second transparent substrate and a second conductive layer; The first transparent substrate and the second transparent substrate are arranged opposite to each other with a gap, the first conductive layer is arranged on a side of the first transparent substrate facing the second transparent substrate, and the second conductive layer is arranged opposite to the first conductive layer; A liquid crystal layer is located between the first transparent conductive substrate and the second transparent conductive substrate; the liquid crystal cavity of the liquid crystal layer is divided into a plurality of display areas, and each of the display areas is filled with cholesteric liquid crystal; A transparent microstructure array is provided on the first conductive layer, and includes a plurality of transparent microstructure units arranged in an array, wherein one transparent microstructure unit is provided in each display area, and the transparent microstructure unit is provided in a transparent convex shape protruding toward the second conductive layer; An alignment layer, comprising a first alignment layer and a second alignment layer having a vertically oriented orientation agent, wherein the first alignment layer is disposed on a convex surface of the transparent microstructure unit facing the second conductive layer, and the second alignment layer is sandwiched between the liquid crystal layer and the second conductive layer; The primer layer is arranged on the side of the first transparent substrate facing away from the second transparent substrate, and an opaque black ink layer is arranged on the primer layer.

2. The fast response black and white reflective liquid crystal display according to claim 1, characterized in that: The fast response black and white reflective liquid crystal display further comprises a frame and spacer columns, the two ends of the frame respectively support and connect the first conductive layer and the second alignment layer; the frame encloses and forms the liquid crystal cavity; Two ends of the spacer column respectively support and connect the first conductive layer and the second alignment layer. A plurality of the spacer columns are located in the liquid crystal cavity to divide the liquid crystal cavity into a plurality of display areas isolated from each other.

3. The fast response black and white reflective liquid crystal display according to claim 2, characterized in that: The spacer column is made of positive polyacrylate or negative polyacrylate, and the cross section of the spacer column is in the shape of a square, a circle, or a long strip.

4. The fast response black and white reflective liquid crystal display according to claim 1, characterized in that: The material of the transparent microstructure unit is one of polyacrylate, epoxy acrylate resin, and polyimide acrylate, and is made by one of transfer, nanoimprinting, photolithography, and inkjet printing; the cross-section of the transparent microstructure unit is one of circular, square, and hexagonal.

5. The fast response black and white reflective liquid crystal display according to claim 1, characterized in that: The first conductive layer is made of indium tin oxide or nanowires, and a distance between the first conductive layer and the second conductive layer is 3µm to 6µm.

6. A method for preparing a fast-response black-and-white reflective liquid crystal display, characterized in that: Used for preparing the fast response black and white reflective liquid crystal display according to any one of claims 1 to 5; The method for preparing a fast-response black-and-white reflective liquid crystal display comprises the following steps: The transparent microstructure array is prepared on the first conductive layer of the first transparent conductive substrate; the transparent microstructure array is composed of a plurality of transparent microstructure units arranged in an array to form an uneven surface; Coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit to form the first alignment layer; The liquid crystal cavity of the liquid crystal layer is prepared by using a frame and a plurality of spacers, and a crystal filling port is reserved; coating and curing a vertically oriented orientation agent on the second conductive layer of the second transparent conductive substrate to form the second alignment layer; Molding the first transparent conductive substrate provided with the transparent microstructure array and the first alignment layer and the second transparent conductive substrate provided with the second alignment layer; The cholesteric liquid crystal is poured into each of the display areas from the reserved crystal pouring port, a light-proof black ink layer is coated on the primer layer, and the IC and FPC are pressed.

7. The method for preparing a fast response black and white reflective liquid crystal display according to claim 6, characterized in that: The step of preparing the transparent microstructure array on the first conductive layer of the first transparent conductive substrate also includes the following steps: According to preset dot matrix and pixel specifications, pixels are etched on the first conductive layer and the second conductive layer to form a pattern or dot matrix consistent with the display area.

8. The method for preparing a fast response black and white reflective liquid crystal display according to claim 6, characterized in that: The step of preparing the transparent microstructure array on the first conductive layer of the first transparent conductive substrate comprises the following sub-steps: Spin coating epoxy acrylate material on the first conductive layer; Using a transfer plate with microstructures, pressing out a preparation of the desired transparent microstructure array; The preparation of the bright microstructure array is cured by ultraviolet light curing to form the transparent microstructure array.

9. The method for preparing a fast response black and white reflective liquid crystal display according to claim 6, characterized in that: The step of coating and curing a vertically oriented orientation agent on the convex surface of the transparent microstructure unit to form the first alignment layer comprises the following sub-steps: Spin coating a VA type vertical alignment agent on the convex surface of the transparent microstructure unit to form a preparation of the first alignment layer; heating and curing the preparation of the first alignment layer without rubbing and orienting it, so as to form the first alignment layer; The step of coating and curing a vertically oriented orientation agent on the second conductive layer of the second transparent conductive substrate to form the second alignment layer comprises the following sub-steps: ； Spin coating a VA type vertical alignment agent on the second conductive layer to form a preparation of the second alignment layer; The preparation of the second alignment layer is heated and cured without being rubbed for alignment, so as to form the second alignment layer.

10. The method for preparing a fast response black and white reflective liquid crystal display according to claim 6, characterized in that: Before the step of combining the first transparent conductive substrate provided with the transparent microstructure array and the first alignment layer and the second transparent conductive substrate provided with the second alignment layer into a mold, the following sub-steps are also included: Spin coating a negative photoresist material on the surface of the first conductive layer; The first conductive layer is exposed and developed, and the height of the photoresist material is adjusted to ensure that the spacing between the first alignment layer and the second conductive layer is in the range of 3 μm to 5 μm.

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