[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description is only for demonstration and explanation, and does not limit the present invention in any form.
[0033] The cholesteric flexible liquid crystal display device includes a light-absorbing layer, a first flexible substrate, a second flexible substrate, a first electrode, a second electrode, a first alignment layer, a second alignment layer, a liquid crystal mixture layer, the first electrode, the second Both electrodes are transparent electrodes that can transmit light. In addition, the device also includes a photomask plate through which ultraviolet light acts on the flexible liquid crystal display device; the liquid crystal mixture layer is a liquid crystal mixture with a special structure polymer wall The liquid crystal mixture layer with a special structure polymer wall is arranged between the first alignment layer and the second alignment layer; the polymer wall formed by the polymerization reaction encapsulates liquid crystal molecules to form a cholesteric flexible liquid crystal display device .
[0034] The first alignment layer and the second alignment layer are alignment layers coated with any one of polyamide, octadecylmalonic acid, benzoic acid derivative, and long-chain quaternary ammonium salt. The first alignment layer and the second alignment layer are appropriately rubbed orientated on the alignment layer. The liquid crystal mixture layer with a special structure polymer wall is that ultraviolet light acts on the flexible liquid crystal display device through the light-transmitting part of the photomask, and the monomer and crosslinking agent in the polymer precursor can be generated under the action of the photoinitiator Polymerization reaction to form a specific shape of polymer wall. The liquid crystal mixture layer with a special structure polymer wall is illuminated by a special photomask plate to form a special structure polymer wall. The light transmission part of the special photomask plate is composed of many regular triangular truss structures, and the special structure Can be further expanded. The liquid crystal mixture layer with a special structure polymer wall is located in the liquid crystal capsule in the liquid crystal layer and is wrapped by the polymer wall. The polymer wall is composed of many special triangular truss structures, and the special structure can be further expanded. Polar nanoparticles are also added to the liquid crystal mixture layer with a special structure polymer wall. The light-absorbing layer is located under the first flexible substrate, or between the first flexible substrate and the first electrode, or between the first electrode and the first alignment layer, and can improve the contrast of the flexible display. Polymer precursors are used for encapsulation of polymer precursors. Under a certain light intensity, the monomers and crosslinkers in the polymer precursor can be polymerized under the action of photoinitiators, and by controlling the light Strongly control the speed of the polymerization reaction, so that the liquid crystal can be phase separated from the mixture smoothly, forming a special regular capsule structure. The liquid crystal capsule has a special triangular truss structure, in which the size of the capsule is 10-500 μm, the height of the polymer wall is 1-20 μm, and the width of the polymer wall is 5-50 μm.
[0035] The method for manufacturing a cholesteric flexible liquid crystal display device using the above-mentioned cholesteric flexible liquid crystal display device includes the following steps: S1, making transparent electrodes on the flexible substrate to drive the cholesteric flexible display device; , S2, coating the orientation layer on the electrode side of the flexible substrate, which can be coated with any one of polyamide, octadecylmalonic acid, benzoic acid derivatives, long-chain quaternary ammonium, and in a certain Appropriate rubbing orientation treatment is carried out under the conditions so that the cholesteric flexible display can achieve the best overall performance of driving voltage and contrast while maintaining the bistable electro-optical characteristics; S3, box processing, leaving opposite sides for Fill the encapsulated cholesteric liquid crystal mixture; S4, prepare the encapsulated liquid crystal mixture in a certain proportion, the mixture includes polymer monomer, photoinitiator, crosslinking agent and cholesteric liquid crystal, and is strictly formulated according to the weight ratio during preparation to make cholesteric Phase flexible liquid crystal display device has the best photoelectric performance and comprehensive display performance; S5, pouring the prepared encapsulated liquid crystal mixture into the liquid crystal cell, and sealing the box with sealant; S6, by irradiating under a specific light mask Ultraviolet light causes the polymer to continuously polymerize into polymer polymer walls and present special encapsulated shapes such as triangular trusses, so that the microencapsulated cholesteric flexible display device has good photoelectric display and mechanical comprehensive performance.
[0036] Such as figure 1 As shown, the method of encapsulating a cholesteric flexible display, the flexible display device part includes a light-absorbing layer 100, a first flexible substrate 110, a second flexible substrate 120, a first electrode 130, a second electrode 140, and a first alignment layer 150 , The second alignment layer 160, the liquid crystal molecules 171, the polymer precursor 172, the polymer wall 173, the encapsulation of the flexible liquid crystal display device requires a photomask 180 and photopolymerization conditions, that is, a certain intensity of ultraviolet light 190. Both the first electrode 130 and the second electrode 140 are transparent electrodes that can transmit light, such as indium zinc oxide (IZO), zinc oxide (zinc oxide), indium tin oxide (ITO), tin oxide (tin oxide) One of the conductive layers of transparent materials. The first alignment layer and the second alignment layer may be alignment layers coated with one of polyamide, octadecylphthalic acid, benzoic acid derivatives, long-chain quaternary ammonium salts, etc., and appropriate Rubbing can reduce the driving voltage of cholesteric liquid crystals, while maintaining the bistable photoelectric effect and improving contrast. The polymer precursors used for encapsulation are publicly discussed in many patents or documents. Here, as long as the monomers and crosslinkers in the polymer precursors are controlled under a certain light intensity, they can occur under the action of photoinitiators. Polymerization reaction, and by controlling the light intensity to control the speed of the polymerization reaction, the speed of the polymerization reaction should be appropriate, so that the liquid crystal can be smoothly phase separated from the mixture to form a special regular capsule structure.
[0037] The ultraviolet light 190 acts on the flexible liquid crystal display device through the light-transmitting part of the photomask. The monomer and crosslinking agent in the polymer precursor 172 can undergo polymerization under the action of the photoinitiator to form a polymer with a specific shape Wall 173.
[0038] The shape of the liquid crystal capsule is controlled by the photomask, and the figure 2 with image 3 In the encapsulated liquid crystal cell made of the photomask plate of the shape shown, the polymer wall is composed of many triangular truss structures. According to the structural mechanics analysis, the polymer wall of this shape is uniformly stressed and has a stable structure. It is a flexible display device. The mechanical performance is significantly improved, and it can withstand greater all-directional stress, thereby improving the stability of the flexible display device.
[0039] The size of the triangular truss structure liquid crystal capsule prepared by the photomask plate is 10-500 μm, the height of the polymer wall is 1-20 μm, and the width of the polymer wall is 5-50 μm.
[0040] A few nanoparticles are added to the encapsulated liquid crystal mixture to further reduce the driving voltage of the flexible display.
[0041] A liquid crystal panel encapsulated by a photomask of a specific shape is also very advantageous for pixel control of a liquid crystal device.
[0042] The light-absorbing layer 100 may be located under the first flexible substrate, or between the first flexible substrate and the first electrode or between the first electrode and the first alignment layer, Figure 4 , 5 , 6 are schematic diagrams of cholesteric flexible display devices under different conditions.
[0043] Figure 4 The cholesteric flexible display device includes: a light-absorbing layer 210, a first flexible substrate 210, a second flexible lower substrate 220, a first electrode 230, a second electrode 240, a first alignment layer 250, a second alignment layer 260, and liquid crystal molecules 271. The polymer wall 273, the encapsulation of the flexible liquid crystal display device requires a photomask 280 and photopolymerization conditions, that is, a certain intensity of ultraviolet light 290.
[0044] Figure 5 A cholesteric flexible display device includes: a light-absorbing layer 310, a first flexible substrate 310, a second flexible lower substrate 320, a first electrode 330, a second electrode 340, a first alignment layer 350, a second alignment layer 360, and liquid crystal molecules 371. The polymer wall 373. In addition, the encapsulation of the flexible display device requires a photomask 380 and photopolymerization conditions, that is, a certain intensity of ultraviolet light 390.
[0045] Image 6 A cholesteric flexible display device includes: a light absorbing layer 410, a first flexible substrate 410, a second flexible lower substrate 420, a first electrode 430, a second electrode 440, a first alignment layer 450, a second alignment layer 460, and liquid crystal molecules 471. The polymer wall 473. The encapsulation of the flexible display device requires a photomask 480 and photopolymerization conditions, that is, a certain intensity of ultraviolet light 490.
[0046] Figure 4 , 5 6. The encapsulated preparation process of the cholesteric flexible display device is basically the same.
[0047] Figure 7 Shows a typical preparation method of the cholesteric flexible display device of the present invention, including: step S1, fabricating transparent electrodes on the flexible substrate to drive the cholesteric flexible display device; step S2, electrode on the flexible substrate One side is coated with an alignment layer, such as one of polyamide, octadecylmalonic acid, benzoic acid derivatives, long-chain quaternary ammonium salt, etc., and rubbing appropriately under certain conditions Orientation processing, so that the cholesteric flexible display maintains the bistable electro-optical characteristics of the driving voltage and the overall performance of the contrast to achieve the best; step S3, box processing, leaving the opposite sides for encapsulation of cholesterol Liquid crystal mixture; Step S4, prepare an encapsulated liquid crystal mixture in a certain ratio, the mixture includes polymer monomer, photoinitiator, crosslinking agent and cholesteric liquid crystal, and is strictly prepared according to the weight ratio during preparation to make the cholesteric flexible liquid crystal display The photoelectric performance and comprehensive display performance of the device reach the best; step S5, pouring the prepared encapsulated liquid crystal mixture into the liquid crystal cell, and sealing the box with sealant; step S6, irradiating ultraviolet light under a specific light mask , The polymer is continuously polymerized into a polymer polymer wall, and presents a special encapsulated shape such as a triangular truss, so that the microencapsulated cholesteric flexible display device has a good photoelectric display and mechanical comprehensive performance.
[0048] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications made by ordinary engineers in the art to the technical solutions of the present invention All improvements and improvements should fall within the scope of protection determined by the claims of the present invention.
