Preparation method of display panel and display panel

Abstract

The invention discloses a preparation method of a display panel and the display panel. The preparation method of the display panel comprises the following steps: preparing at least three curable cholesteric liquid crystal compositions, wherein each curable cholesteric liquid crystal composition comprises a curable component, a curing initiator and a cholesteric liquid crystal; providing a first substrate; injecting at least three curable cholesteric liquid crystal compositions into a plurality of pixel accommodating areas by adopting an ink-jet printing process, wherein one curable cholesteric liquid crystal composition is injected into each pixel accommodating area; curing the curable cholesteric liquid crystal composition in the pixel accommodating area, so that the curable component is cured to form a thin film coating layer, and the thin film coating layer wraps the cholesteric liquid crystal to form a cholesteric liquid crystal capsule; a second substrate is provided, and the second substrate and the first substrate are attached and packaged. By adopting the preparation method, the problems that color mixing of adjacent sub-pixels is caused by cholesteric liquid crystal movement diffusion, the reflectivity of the cholesteric liquid crystal is reduced, and the picture display effect is affected are solved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a method for preparing a display panel and the display panel itself. Background Technology

[0002] Electronic paper technology is increasingly widely used due to its advantages such as low power consumption and visual comfort, and market demand is growing rapidly. Currently, the mainstream electronic paper technology on the market is electrophoretic electronic ink technology. However, cholesteric liquid crystal technology, with its fast response, bistable state (able to maintain display state without an electric field), and superior reflective brightness and color saturation, has become a strong candidate to compete with electronic ink technology.

[0003] Achieving colorization is a key direction for the development of electronic paper technology. Currently, most color cholesteric liquid crystal displays on the market use an RGB three-cell stacking scheme, which involves fabricating three separate cholesteric liquid crystals that reflect red, green, and blue light, and then stacking them vertically. While this scheme can achieve full-color display, it has inherent and serious drawbacks: ① High manufacturing costs, requiring three independent cell fabrication processes and materials, resulting in complex processes and significant challenges in yield; ② Heavy equipment, with the three-layer structure significantly increasing the thickness and weight of the display, hindering the design of thinner and lighter terminal devices; ③ Low optical efficiency, as light needs to penetrate multiple layers of the structure, with each layer causing light loss, leading to a decrease in overall brightness and color performance.

[0004] In related technologies, a single-cell color cholesteric liquid crystal scheme has been proposed, in which red, green, and blue cholesteric liquid crystal materials are filled into corresponding sub-pixels within a single liquid crystal cell. However, after filling, the fluid cholesteric liquid crystal material is driven by capillary forces generated by tiny gaps in the upper substrate, causing lateral movement and diffusion, resulting in color mixing between adjacent sub-pixels and compromising the purity and quality of the displayed image. Moreover, in related technologies, to prevent the cholesteric liquid crystal from flowing, the helical structure of the cholesteric liquid crystal is easily over-segmented and disrupted, sacrificing reflective area, leading to decreased reflectivity and increased haze, which cannot meet the display requirements of electronic paper. Summary of the Invention

[0005] This application mainly provides a method for preparing a display panel and a display panel to solve the problems in related technologies, such as the easy movement and diffusion of cholesteric liquid crystals leading to color mixing between adjacent sub-pixels, and the disruption of the helical structure of cholesteric liquid crystals resulting in decreased reflectivity and affecting the display effect.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a method for manufacturing a display panel, comprising: Prepare at least three curable cholesteric liquid crystal compositions; wherein each of the curable cholesteric liquid crystal compositions comprises a curable component, a curing initiator, and a cholesteric liquid crystal; A first substrate is provided; wherein the first substrate includes a first substrate, a driving circuit layer, a first electrode layer and a barrier layer stacked sequentially; the barrier layer includes a plurality of barriers, and the plurality of barriers surround to form a plurality of pixel accommodating areas; At least three of the curable cholesteric liquid crystal compositions are injected into a plurality of the pixel accommodating regions using an inkjet printing process, with one of the curable cholesteric liquid crystal compositions injected into each pixel accommodating region. The curable cholesteric liquid crystal composition within the pixel accommodating area is cured to form a thin film coating layer, which encapsulates the cholesteric liquid crystal to form a cholesteric liquid crystal capsule. A second substrate is provided, and the second substrate is bonded and packaged with the first substrate; wherein the second substrate covers and seals the pixel accommodating area.

[0007] In some embodiments, the step of preparing at least three curable cholesteric liquid crystal compositions specifically includes: Three identical nematic liquid crystal substrates are provided, and a chiral dopant is added to each of the nematic liquid crystal substrates to prepare three cholesteric liquid crystals; wherein, different types of cholesteric liquid crystals can reflect different colors of light; in the three cholesteric liquid crystals, the chiral dopant is the same type, and the mass ratio of the chiral dopant is 1:1.5:2. One part by weight of each cholesteric liquid crystal is uniformly mixed with 7-8 parts by weight of the curable component and 1-2 parts by weight of the curing initiator to form the curable cholesteric liquid crystal composition.

[0008] In some embodiments, the curing initiator is a photocuring initiator; The step of curing the curable cholesteric liquid crystal composition within the pixel accommodating area specifically includes: The first substrate is placed in an inert gas environment and irradiated with ultraviolet light with an intensity of 48mW / cm²-52mW / cm² for 55S-65S; the wavelength of the ultraviolet light is 360nm-370nm; wherein the inert gas includes nitrogen.

[0009] In some embodiments, the photocuring initiator comprises phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0010] In some embodiments, the curing initiator is a thermosetting initiator; The step of curing the curable cholesteric liquid crystal composition within the pixel accommodating area specifically includes: The first substrate is placed in an inert gas environment and heated using a heating device at a temperature of 35°C-45°C for 12-18 minutes; wherein the inert gas includes nitrogen.

[0011] In some embodiments, the thermosetting initiator includes benzoyl peroxide or azobisisobutyronitrile.

[0012] In some embodiments, the curable component includes any one or more of polyethylene glycol diacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, N-vinylpyrrolidone, hydrophilic polyurethane acrylate, acryloyloxy compounds, or vinyl compounds.

[0013] In some embodiments, after curing the curable cholesteric liquid crystal composition within the pixel accommodating region, the resulting thin film coating is gel-like.

[0014] In some embodiments, after curing the curable cholesteric liquid crystal composition within the pixel accommodating region, the reflectivity of the cholesteric liquid crystal in the cholesteric liquid crystal capsule is greater than or equal to 85% of the reflectivity of the cholesteric liquid crystal without the addition of the curable component.

[0015] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a display panel, wherein the display panel is prepared by any of the display panel preparation methods described above; The display panel includes a first cholesteric liquid crystal, a second cholesteric liquid crystal, and a third cholesteric liquid crystal; the first cholesteric liquid crystal reflects red light, the second cholesteric liquid crystal reflects green light, and the third cholesteric liquid crystal reflects blue light; the cholesteric liquid crystal capsules in two adjacent pixel accommodating areas are separated by the barrier. The second substrate includes a second substrate and a second electrode layer; the second substrate is a transparent substrate and the second electrode layer is a transparent electrode layer.

[0016] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses a method for preparing a display panel and the display panel itself. The method for preparing the display panel includes: preparing at least three curable cholesteric liquid crystal compositions; wherein each curable cholesteric liquid crystal composition includes a curable component, a curing initiator, and a cholesteric liquid crystal; providing a first substrate; wherein the first substrate includes a first substrate, a driving circuit layer, a first electrode layer, and a barrier layer stacked sequentially; the barrier layer includes multiple barriers, which enclose multiple pixel receiving areas; injecting at least three curable cholesteric liquid crystal compositions into the multiple pixel receiving areas using an inkjet printing process, wherein each pixel receiving area is injected with one curable cholesteric liquid crystal composition; curing the curable cholesteric liquid crystal compositions in the pixel receiving areas to cure the curable component into a thin film coating layer, the thin film coating layer encapsulating the cholesteric liquid crystal to form a cholesteric liquid crystal capsule; providing a second substrate, and bonding and encapsulating the second substrate with the first substrate; wherein the second substrate covers and seals the pixel receiving areas.

[0017] Using the above preparation method, each curable cholesteric liquid crystal composition is configured to include a curable component, a curing initiator, and a cholesteric liquid crystal. Furthermore, multiple baffles in the baffle layer of the first substrate enclose multiple pixel receiving areas. By injecting a curable cholesteric liquid crystal composition into each pixel receiving area and curing the curable cholesteric liquid crystal composition, at least three curable cholesteric liquid crystal compositions in the multiple pixel receiving areas of the first substrate, after curing, can reflect at least three different colors of light, enabling full-color electronic paper display. Moreover, by curing the curable cholesteric liquid crystal composition, the curable component can be cured to form a thin film coating layer. The thin film coating layer encapsulates the cholesteric liquid crystal to form a cholesteric liquid crystal capsule. The cholesteric liquid crystal is encapsulated by the thin film coating layer to form a capsule shape and is confined by the baffles within the corresponding pixel receiving area. Even though perfect pixel-level sealing is difficult to achieve due to limitations in microfabrication and encapsulation technology, this method can still achieve full color electronic paper display. A gap exists between the second substrate and the barrier. The cholesteric liquid crystal, encased in the thin film coating layer, is less likely to flow into the pixel accommodating area of ​​adjacent sub-pixels. The cholesteric liquid crystal is encased and does not easily move laterally or diffuse, effectively avoiding the problem of color mixing or cross-contamination between different color sub-pixels, which is beneficial to improving the purity and quality of the displayed image. At the same time, after the curable component is cured, it forms a continuous thin film coating layer. The cholesteric liquid crystal is encased in the thin film coating layer to form a capsule-shaped cholesteric liquid crystal capsule. The helical structure of the cholesteric liquid crystal is not easily divided or disrupted, maximizing the preservation of the large size and regular helical structure of the cholesteric liquid crystal, protecting the integrity of the helical structure of the cholesteric liquid crystal, and ensuring the high reflectivity and high color purity of the cholesteric liquid crystal. This effectively avoids the problems of decreased reflectivity, increased haze, dim and blurry display effect, and inability to meet the requirements of electronic paper display caused by excessive division and disruption of the helical structure of the cholesteric liquid crystal to prevent its flow in related technologies. The display panel prepared by the above-described method effectively solves the problems of cholesteric liquid crystal migration and diffusion leading to color mixing of cholesteric liquid crystals in adjacent sub-pixels in electronic paper display panels, and the reduction in reflectivity due to the disruption of the helical structure of cholesteric liquid crystals, which affects the display effect. This method is beneficial to improving the display effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a flowchart illustrating one embodiment of the method for manufacturing a display panel provided in the first embodiment of this application; Figure 2 yes Figure 1 A flowchart illustrating step S1 of the provided method for manufacturing a display panel. Figure 3 yes Figure 1 A cross-sectional schematic diagram of a first substrate provided in step S2 of the method for fabricating the provided display panel; Figure 4 yes Figure 3 A top view of the first substrate is provided. Figure 5 This is a schematic diagram of the structure of an embodiment of the display panel provided in the second embodiment of this application.

[0019] Icon labels: 100. Display panel; 1. First substrate; 11. First substrate; 12. Driving circuit layer; 13. First electrode layer; 14. Barrier layer; 141. Barrier; 142. Pixel accommodating area; 2. Cholesteric liquid crystal layer; 21. Cholesteric liquid crystal capsule; 22. Thin film coating layer; 23. Cholesteric liquid crystal; 3. Second substrate; 31. Second substrate; 32. Second electrode layer. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] See Figures 1 to 5 , Figure 1 This is a schematic flowchart illustrating one embodiment of the method for manufacturing a display panel provided in the first embodiment of this application. Figure 2 yes Figure 1 The provided method for manufacturing a display panel includes a schematic flowchart of step S1 of an embodiment. Figure 3 yes Figure 1 The provided display panel fabrication method provides a cross-sectional schematic diagram of the first substrate according to step S2 of the method. Figure 4 yes Figure 3 A top view of the first substrate is provided. Figure 5 This is a schematic diagram of the structure of an embodiment of the display panel provided in the second embodiment of this application.

[0024] See Figure 1 The first embodiment of this application provides a method for fabricating a display panel 100. This method is used to fabricate the display panel 100, and the structure of the display panel 100 can be referred to... Figure 5 Specifically, the manufacturing method of the display panel 100 includes: S1: Prepare at least three curable cholesteric liquid crystal compositions; wherein each curable cholesteric liquid crystal composition comprises a curable component, a curing initiator, and a cholesteric liquid crystal 23.

[0025] Specifically, firstly, at least three curable cholesteric liquid crystal compositions are prepared, each curable cholesteric liquid crystal composition comprising a curable component, a curing initiator, and a cholesteric liquid crystal 23.

[0026] For details, see Figure 2 In some embodiments, the step S1 of preparing at least three curable cholesteric liquid crystal compositions specifically includes: S11: Provide three identical nematic liquid crystal substrates, add chiral dopants to each nematic liquid crystal substrate, and prepare three cholesteric liquid crystals 23.

[0027] Specifically, in some embodiments, three identical nematic liquid crystal substrates are first provided. Specifically, in some embodiments, the three nematic liquid crystal substrates are of the same type and have the same mass fraction; for example, each of the three nematic liquid crystal substrates is 80 parts by mass. Having the same type of nematic liquid crystal substrate means using the same nematic liquid crystal material as the basic framework; the specific type of nematic liquid crystal substrate can be selected as needed.

[0028] Then, chiral dopants are added to each group of nematic liquid crystal substrates to formulate three cholesteric liquid crystals 23. Specifically, in some embodiments, the type of chiral dopant added to each group of nematic liquid crystal substrates is the same, but the specific concentration is different.

[0029] Specifically, in the three cholesteric liquid crystals 23 prepared, the types of chiral dopants are the same, and the mass ratio of the chiral dopants is 1:1.5:2. Using the same type of chiral dopant means using the same chiral molecule as an additive; the specific type of chiral dopant can be selected according to needs.

[0030] It can be understood that the mass fraction of chiral dopant is the concentration ratio. If the mass fraction of chiral dopant added to the three identical nematic liquid crystal substrates is different, then the pitch of the three cholesteric liquid crystals 23 will also be different. The three cholesteric liquid crystals 23 can reflect three different colors of light.

[0031] In one specific embodiment, the three cholesteric liquid crystals 23 can respectively reflect red, green, and blue light. For example, the three cholesteric liquid crystals 23 can be a first cholesteric liquid crystal, a second cholesteric liquid crystal, and a third cholesteric liquid crystal, respectively. The first cholesteric liquid crystal reflects red light, the second cholesteric liquid crystal reflects green light, and the third cholesteric liquid crystal reflects blue light. By setting the mass ratio of the chiral dopants in the three cholesteric liquid crystals 23 to 1:1.5:2, the pitch of the helical structure of the three cholesteric liquid crystals 23 can be precisely controlled, thereby facilitating the accurate reflection of red, green, and blue light.

[0032] For example, 20 parts by mass of chiral dopant can be added to a group of 80 parts by mass of nematic liquid crystal matrix to prepare cholesteric liquid crystal 23 with a specific pitch that can reflect green light (center wavelength about 550 nm).

[0033] Since the mass ratio of the three chiral dopants in cholesteric liquid crystal 23 is 1:1.5:2, 13 parts by mass of chiral dopants can be added to another group of 80 parts by mass of nematic liquid crystal matrix to prepare cholesteric liquid crystal 23 with a specific pitch that can reflect red light.

[0034] Similarly, 27 parts by mass of chiral dopant can be added to the remaining 80 parts by mass of nematic liquid crystal matrix to prepare cholesteric liquid crystal 23 with a specific pitch that can reflect blue light.

[0035] In other embodiments, four or five sets of any number of identical nematic liquid crystal substrates may be provided, and a chiral dopant may be added to each set of nematic liquid crystal substrates to prepare four or five types of cholesteric liquid crystals 23.

[0036] For example, four identical nematic liquid crystal substrates can be provided, and a chiral dopant can be added to each nematic liquid crystal substrate to prepare four types of cholesteric liquid crystals 23. The four types of cholesteric liquid crystals 23 can be used to reflect red, green, blue, or white light, respectively. Alternatively, five identical nematic liquid crystal substrates can be provided, and a chiral dopant can be added to each nematic liquid crystal substrate to prepare five types of cholesteric liquid crystals 23. The five types of cholesteric liquid crystals 23 can be used to reflect red, green, blue, white, or yellow light, respectively. The number of nematic liquid crystal substrates and the number and type of cholesteric liquid crystals 23 prepared can be designed or selected as needed, as long as the prepared display panel 100 can achieve full-color display. This application embodiment does not limit this.

[0037] S12: Mix 1 part by weight of each cholesteric liquid crystal 23 with 7-8 parts by weight of the curable component and 1-2 parts by weight of the curing initiator to form a curable cholesteric liquid crystal composition.

[0038] Specifically, in some embodiments, the three different cholesteric liquid crystals 23 obtained in step S11 can be used as 1 part by mass, and each cholesteric liquid crystal 23 can be uniformly mixed with 7-8 parts by mass of curable components and 1-2 parts by mass of curing initiator to form three curable cholesteric liquid crystal compositions.

[0039] It is understandable that by using a ratio of 1 part by mass of cholesteric liquid crystal 23, 7-8 parts by mass of curable component, and 1-2 parts by mass of curing initiator, the curable component can form a continuous aqueous skeleton, i.e., a thin film coating layer 22, during the polymerization process. This allows the curable component to completely encapsulate the cholesteric liquid crystal 23, preventing excessive segmentation or disruption of the cholesteric liquid crystal 23. This helps maintain the integrity of the helical structure of the cholesteric liquid crystal 23, thereby facilitating the maintenance of high reflectivity and high color purity. Moreover, the above component ratio also makes the preparation process of the curable cholesteric liquid crystal composition more efficient, which is beneficial to improving the yield and color purity of full-color displays.

[0040] In some embodiments, the mass ratio of the cholesteric liquid crystal 23 to the curing initiator of the curable component in the three curable cholesteric liquid crystal compositions can be the same, or different ratios can be set as needed, and can be designed according to actual needs.

[0041] In other embodiments, the mass ratio of cholesteric liquid crystal 23, curable component, and curing initiator may not be limited to the ratio in the above embodiments and can be adjusted as needed. The types of curable cholesteric liquid crystal compositions prepared can also be four, five, or any number of other types. The specific types and quantities of curable cholesteric liquid crystal compositions and the reflective colors of their cholesteric liquid crystal 23 can be designed or selected as needed, as long as the prepared display panel 100 can achieve full-color display. This application does not limit this aspect.

[0042] S2: Provide a first substrate 1; wherein the first substrate 1 includes a first substrate 11, a driving circuit layer 12, a first electrode layer 13 and a barrier layer 14 stacked sequentially; the barrier layer 14 includes a plurality of barriers 141, and the plurality of barriers 141 surround to form a plurality of pixel accommodating areas 142.

[0043] Specifically, a first substrate 1 is provided, which may be an array substrate. See [link / reference] Figure 3 and Figure 4 In some embodiments, the first substrate 1 includes a first substrate 11, a driving circuit layer 12, a first electrode layer 13 and a barrier layer 14 stacked sequentially. The barrier layer 14 includes a plurality of barriers 141, which surround and form a plurality of pixel accommodating areas 142.

[0044] For example, multiple barriers 141 are arranged in an array, and the barriers 141 are intersecting in the horizontal and vertical directions, respectively, forming a pixel receiving area 142 that can be rectangular in shape. In other embodiments, the barriers 141 can also be distributed in other directions, and the pixel receiving area 142 can also be any regular or irregular shape such as circular, rhomboid, elliptical, or triangular, which can be designed as needed.

[0045] In some embodiments, the barrier layer 14 can be a photoresist barrier, which is formed by coating photoresist and then exposing and developing it. In other embodiments, the barrier layer 14 can also be made of other materials and formed using other processes, and can be designed as needed.

[0046] In some embodiments, the driving circuit layer 12 may include a plurality of arrayed thin-film transistors (TFTs), and the first electrode layer 13 may be made of ITO (indium tin oxide). The first electrode layer 13 may be a pixel electrode layer. The first electrode layer 13 may include a plurality of pixel electrodes arranged in an array, with each pixel electrode corresponding to a plurality of pixel accommodating regions 142. In other embodiments, the first electrode layer 13 may also be made of other conductive materials.

[0047] Since the first substrate 1 provided in this application embodiment includes a barrier layer 14, the barrier layer 14 includes a plurality of barriers 141 and surrounds a plurality of pixel receiving areas 142, by setting the barrier layer 14, a plurality of sub-pixels can be isolated, which can prevent the sub-pixels in adjacent pixel receiving areas 142 from spreading laterally or moving in subsequent processes, which is beneficial to avoid color mixing or cross-coloring of adjacent sub-pixels and facilitates the improvement of display effect.

[0048] S3: At least three curable cholesteric liquid crystal compositions are injected into multiple pixel accommodating regions 142 using an inkjet printing process, with one curable cholesteric liquid crystal composition injected into each pixel accommodating region 142.

[0049] Specifically, an inkjet printing process is used to inject at least three curable cholesteric liquid crystal compositions into multiple pixel receiving areas 142, with each pixel receiving area 142 containing only one curable cholesteric liquid crystal composition. This means that each pixel receiving area 142 contains only one type of curable cholesteric liquid crystal composition. It can be understood that the inkjet printing process can precisely inject at least three curable cholesteric liquid crystal compositions into the corresponding pixel receiving areas 142, effectively avoiding color mixing.

[0050] In one specific embodiment, the types of curable cholesteric liquid crystal compositions injected into adjacent pixel accommodating areas 142 are different. For example, step S1 provides three types of curable cholesteric liquid crystal compositions. The above three different curable cholesteric liquid crystal compositions are injected into each of the three adjacent pixel accommodating areas 142 respectively, so as to reflect red, green and blue light respectively, which facilitates full-color display and improves display uniformity.

[0051] It is understood that in this embodiment, each pixel accommodating area 142 contains only one type of curable cholesteric liquid crystal composition. This avoids the formation of a three-layer structure by injecting three types of curable cholesteric liquid crystal compositions into the same pixel accommodating area 142, which would increase the thickness and weight of the resulting display panel, hindering thin and light design, and causing complex processes and high manufacturing costs. It also avoids light loss due to light needing to penetrate a three-layer structure, thus preventing a decrease in overall brightness and color performance. This arrangement achieves full-color display while also facilitating thin and light display, improving optical efficiency, enhancing display effects, reducing process difficulty, and saving costs.

[0052] In other embodiments, step S1 may provide four or five types of curable cholesteric liquid crystal compositions of any number. The four or five types of curable cholesteric liquid crystal compositions of any number may be injected one-to-one into multiple pixel receiving areas 142 using an inkjet printing process. Each pixel receiving area 142 is injected with one type of curable cholesteric liquid crystal composition to facilitate full-color display.

[0053] S4: The curable cholesteric liquid crystal composition in the pixel accommodating area 142 is cured so that the curable component is cured to form a thin film coating layer 22, and the thin film coating layer 22 encapsulates the cholesteric liquid crystal 23 to form a cholesteric liquid crystal capsule 21.

[0054] Specifically, after injecting the curable cholesteric liquid crystal composition into the pixel receiving area 142 in step S3, the curable cholesteric liquid crystal composition in the pixel receiving area 142 is cured so that the curable components of the curable cholesteric liquid crystal composition in the pixel receiving area 142 are cured to form a thin film coating layer 22. The cholesteric liquid crystal 23 is encapsulated by the thin film coating layer 22 to form a cholesteric liquid crystal capsule 21 (refer to...). Figure 5 This allows the cholesteric liquid crystal 23 to be encapsulated by the thin film coating layer 22 without leakage.

[0055] In some embodiments, the curing initiator is a photocuring initiator. Specifically, a photocuring initiator refers to a compound that can initiate the polymerization of the curable component under light irradiation. Step S4, the step of curing the curable cholesteric liquid crystal composition within the pixel accommodating region 142, specifically includes: The first substrate 1 is placed in an inert gas environment and irradiated with ultraviolet light with an intensity of 48mW / cm²-52mW / cm² for 55S-65S; the wavelength of the ultraviolet light is 360nm-370nm; wherein the inert gas includes nitrogen.

[0056] Specifically, firstly, a first substrate 1, in which a curable cholesteric liquid crystal composition has been injected, is placed in an inert gas environment. For example, the inert gas may include nitrogen, and the first substrate 1 may be placed in a nitrogen environment. The inert gas environment is used to isolate oxygen and prevent oxidation during the curing process. In other embodiments, the inert gas may also be a gas such as argon.

[0057] Then, the first substrate 1 is irradiated with ultraviolet light. The intensity of the ultraviolet light is 48mW / cm²-52mW / cm², the wavelength of the ultraviolet light is 360nm-370nm, and the irradiation time is 55S-65S, so that the photocuring initiator of the curable cholesteric liquid crystal composition initiates the curable component to cure, thereby forming a thin film coating layer 22.

[0058] It is understood that by subjecting the first substrate 1 to the aforementioned ultraviolet light irradiation process in an inert gas environment, the photocuring initiator of the curable cholesteric liquid crystal composition can be ensured to initiate the curable component's curing polymerization under ultraviolet light irradiation conditions, thereby forming a continuous thin film coating layer 22. The inert gas environment effectively prevents oxidation during the curing process, thereby improving display purity.

[0059] Furthermore, the use of a photocurable initiator allows the polymerization reaction to proceed efficiently at low temperatures, which helps maintain the integrity of the helical structure of the cholesteric liquid crystal 23. Specifically, controlling the light intensity within the range of 48 mW / cm² to 52 mW / cm² ensures a moderate curing rate, uniform polymerization, and avoids local overheating or over-curing that could damage the helical structure of the cholesteric liquid crystal 23, facilitating further improvement in reflectivity. Moreover, the irradiation time of 55-65 seconds ensures sufficient and uniform polymerization depth, which helps maintain the integrity of the film coating layer 22 and its fixation and coating effect on the cholesteric liquid crystal 23. The ultraviolet light wavelength of 360 nm to 370 nm is designed to match the absorption peak of the photocurable initiator. Within this range, the ultraviolet light wavelength matches the absorption spectrum of the photocurable initiator, effectively activating it, improving curing efficiency, and initiating the polymerization and curing of the curable components to form a continuous framework, i.e., a continuous film coating layer 22, which encapsulates the cholesteric liquid crystal 23 to form a stable capsule structure.

[0060] In one specific embodiment, ultraviolet light with an intensity of 50 mW / cm² and a wavelength of 365 nm can be used to irradiate the entire first substrate 1 for 60 seconds, so that the photocuring initiator of the curable cholesteric liquid crystal composition can initiate the curable components to achieve more efficient and uniform curing, so as to form a more uniform thin film coating layer 22, and also effectively avoid the destruction of the helical structure of the cholesteric liquid crystal 23.

[0061] Specifically, during the curing process, the photocuring initiator, as a core functional component, is uniformly dispersed in the curable cholesteric liquid crystal composition. It is rapidly activated by absorbing ultraviolet light with a wavelength of 360nm to 370nm, generating highly active free radicals that initiate the polymerization reaction of the curable components, forming a continuous polymer backbone network, i.e., a thin film coating layer 22, which encapsulates the cholesteric liquid crystal 23. This backbone network, i.e., the thin film coating layer 22, interacts with the oily properties of the cholesteric liquid crystal 23, encapsulating the cholesteric liquid crystal 23 within the thin film coating layer 22 to form a stable oil-in-water structure. This effectively prevents the cholesteric liquid crystal 23 from flowing within the pixel receiving area 142 and also effectively prevents the cholesteric liquid crystal 23 from flowing between different pixel receiving areas 142 under the capillary force of the gap between the baffle 141 and the second substrate 3, thus avoiding color mixing or cross-contamination between adjacent sub-pixels.

[0062] In some embodiments, the photocuring initiator includes phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, namely Irgacure 819 (IBAPO). Specifically, phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide is a highly efficient photocuring initiator with a peak absorption wavelength in the range of 360 nm to 370 nm, which precisely matches the ultraviolet curing conditions set in the above-mentioned photocuring process, thus facilitating improved photocuring efficiency.

[0063] The specific wavelength absorption characteristics of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide enable the polymerization reaction to proceed uniformly and efficiently at low temperatures, which helps maintain the integrity of the helical structure of the cholesteric liquid crystal 23, thereby further improving reflectivity. Its rapid activation ability ensures that there is no local overheating during the curing process, which helps ensure the stability of the helical structure of the cholesteric liquid crystal 23 and further improves color purity. The chemical structure design of this photocuring initiator makes the interface between the polymerization framework, i.e., the thin film coating layer 22, and the cholesteric liquid crystal 23 more tightly connected, which helps reduce light scattering and thus further improves the purity of the displayed image.

[0064] In one specific embodiment, three different cholesteric liquid crystals 23 obtained in step S11 can be used, with each type of cholesteric liquid crystal 23 as 1 part by weight, and uniformly mixed with 8 parts by weight of a curable component and 1 part by weight of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide to obtain a curable cholesteric liquid crystal composition. The curable component can be polyethylene glycol diacrylate, which is used as an aqueous curable component, and phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide (i.e., Irgacure 819) is used as a photocuring initiator. Using the above ratio facilitates improved curing efficiency, ensures the integrity of the helical structure of the cholesteric liquid crystal 23, and enhances optical performance.

[0065] In other embodiments, other curable components or photocurable initiators may be used, as well as other component ratios, which can be designed according to needs.

[0066] In other embodiments, the curing initiator is a thermosetting initiator; specifically, a thermosetting initiator refers to a compound that can decompose and generate free radicals under thermal action. Step S4, the step of curing the curable cholesteric liquid crystal composition within the pixel accommodating region 142, specifically includes: The first substrate 1 is placed in an inert gas environment and heated by a heating device at a temperature of 40°C for 12-18 minutes.

[0067] Specifically, a first substrate 1, into which a curable cholesteric liquid crystal composition has been injected, is placed in an inert gas environment. For example, the inert gas may include nitrogen, and the first substrate 1 may be placed in a nitrogen environment. The inert gas environment is used to isolate oxygen and prevent oxidation during the curing process. In other embodiments, the inert gas may also be a gas such as argon.

[0068] The first substrate 1 is heated using a heating device, such as an oven, for example, a nitrogen oven. Specifically, the heating temperature is 35°C-45°C, and the heating time is 12-18 minutes. The first substrate 1 is placed in this inert gas environment and heated to the range of 35°C-45°C for 12-18 minutes to ensure that the curable components are fully cured and polymerized to form a continuous thin film coating layer 22.

[0069] It is understood that by performing the above-mentioned heating process on the first substrate 1 using the heating device, it can be ensured that the thermosetting initiator of the curable cholesteric liquid crystal composition is fully decomposed under heating conditions and initiates the polymerization of the curable components, thereby forming a continuous thin film coating layer 22. The use of a thermosetting initiator allows the polymerization reaction to proceed controllably under thermal action, thereby further improving the integrity of the helical structure of the cholesteric liquid crystal 23; the inert gas environment allows the curing process to proceed under oxygen-free conditions, which is beneficial for maintaining the polymerization efficiency of the curable components; the heating temperature is 35℃-45℃, and the time is 12min-18min, ensuring that the structure of the thin film coating layer 22 is uniform and does not damage the structure of the cholesteric liquid crystal 23, thereby further improving reflectivity and display purity.

[0070] The specific working process is as follows: Under the protection of inert gas, the thermosetting initiator of the curable cholesteric liquid crystal composition decomposes upon heating to generate free radicals, which triggers the curable component to cure and polymerize, forming a thin film coating layer 22 that encapsulates the cholesteric liquid crystal 23. This process is completed at a mild temperature, avoiding damage to the liquid crystal structure caused by the high temperature of traditional thermosetting.

[0071] In one specific embodiment, the first substrate 1 can be placed in a nitrogen atmosphere and heated using a heating device such as an oven at a temperature of 40°C for 15 minutes. Using the above heating temperature and time can better ensure the structural uniformity and continuity of the thin film coating layer 22, further improve the integrity of the helical structure of the cholesteric liquid crystal 23, and enhance display performance.

[0072] Thermosetting initiators include benzoyl peroxide (BPO) or azobisisobutyronitrile (AIBN). As thermosetting initiators, benzoyl peroxide or azobisisobutyronitrile can stably decompose to generate free radicals under heating conditions of 35℃-45℃, triggering the polymerization reaction of the curable component.

[0073] In some embodiments, the thermosetting initiator, namely benzoyl peroxide or azobisisobutyronitrile, is 1-2 parts by mass. Specifically, the thermosetting initiator can be 1 part by mass or 2 parts by mass, which can be set as needed.

[0074] Specifically, benzoyl peroxide can be used as a thermosetting initiator, which has high decomposition efficiency and leaves no residue at 35℃-45℃; alternatively, azobisisobutyronitrile (AIBN) can be used as a thermosetting initiator, which has a wide decomposition temperature range suitable for different substrate materials. Using benzoyl peroxide or AIBN as a thermosetting initiator ensures that its decomposition at 35℃-45℃ matches the temperature, thus achieving a uniform polymerization reaction. This avoids uneven decomposition rates of the thermosetting initiator, preventing localized excessive thickness or thinness of the film coating layer 22. This facilitates further improvement of the integrity of the helical structure of the cholesteric liquid crystal 23, while maintaining a relatively large size. This maximizes the preservation of the large size and regular helical structure of the cholesteric liquid crystal 23, ensuring its excellent reflective display performance.

[0075] The specific working process is as follows: In an inert gas environment, the above-mentioned thermosetting initiator decomposes upon heating to generate free radicals, which initiate the polymerization of curable components and form a continuous thin film coating layer 22. This process is carried out at 35℃-45℃, which avoids the destruction of the helical structure of the cholesteric liquid crystal 23 caused by high temperature, and ensures that the cholesteric liquid crystal 23 is fixed in the thin film coating layer 22 and cannot diffuse laterally.

[0076] The curable component can be a hydrophilic polymerizable material, which is an aqueous curable component. After the curable component is mixed with the cholesteric liquid crystal 23, the oily nature of the cholesteric liquid crystal 23 is utilized to form an oil-water incompatible system with the aqueous curable component. During the curing process, the oil-water incompatibility leads to phase separation, forming an oil-in-water microcapsule-like or continuous phase-isolated structure. In this structure, the cured curable component serves as a continuous aqueous phase framework, i.e., the thin film coating layer 22, while the cholesteric liquid crystal 23 is fixed within the thin film coating layer 22 as the encapsulated oil phase.

[0077] Specifically, in some embodiments, the curable component includes any one or more of polyethylene glycol diacrylate (PEGDA), hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), N-vinylpyrrolidone (NVP), hydrophilic polyurethane acrylate, acryloyloxy-containing compounds, or vinyl-containing compounds. The acryloyloxy-containing or vinyl-containing compounds are hydrophilic monomers with thermal polymerization activity.

[0078] In other embodiments, the curable component may also be other hydrophilic monomers with thermal polymerization activity, so as to facilitate curing by thermal curing in conjunction with a thermal curing initiator.

[0079] In some embodiments, after curing the curable cholesteric liquid crystal composition in the pixel accommodating region 142 as described in step S4, the resulting thin film coating layer 22 is gel-like.

[0080] The thin film coating 22 is formed by curing a curable component. A gel-like structure refers to a semi-solid, elastic, and non-flowing structure. During curing, the curable component polymerizes to form a continuous gel framework, while the cholesteric liquid crystal 23, as an oil phase, is encapsulated within it. Due to the immiscibility of oil and water, the two phases separate, forming a microcapsule structure. This gel-like structure prevents the helical structure of the cholesteric liquid crystal 23 from being excessively segmented or destroyed.

[0081] During curing, ultraviolet light or heating can initiate the polymerization of the curable components, forming an elastic gel film that encapsulates the cholesteric liquid crystal 23 to form stable cholesteric liquid crystal capsules 21. The gel-like structure of the film coating layer 22 prevents the helical structure of the cholesteric liquid crystal 23 from being easily broken during curing, thus preventing excessive segmentation or destruction of the helical structure and further improving reflectivity, ensuring the reflective area of ​​the cholesteric liquid crystal 23. The gel-like flexibility also helps prevent the cholesteric liquid crystal 23 from laterally migrating and diffusing due to capillary forces, further improving display purity and enhancing the display performance of the prepared display panel 100. Moreover, after curing the curable components, the gel-like film coating layer 22 encapsulates the cholesteric liquid crystal 23 to form stable cholesteric liquid crystal capsules 21, ensuring the photoelectric effect and the controllability of the electric field on the pitch of the cholesteric liquid crystal 23, thereby guaranteeing the display effect.

[0082] In other embodiments, after curing the curable cholesteric liquid crystal composition, the thin film coating layer 22 formed by curing the curable components can also be a stable solid structure.

[0083] In some embodiments, after curable cholesteric liquid crystal composition in pixel accommodating region 142 is cured, the reflectivity of cholesteric liquid crystal 23 in cholesteric liquid crystal capsule 21 is greater than or equal to 85% of the reflectivity of cholesteric liquid crystal 23 without curable component. That is, after the cholesteric liquid crystal capsule 21 is cured and formed, the cholesteric liquid crystal 23 is wrapped by the thin film coating layer 22. The cholesteric liquid crystal 23 is well fixed in the thin film coating layer 22 without any color bleeding. Moreover, the reflectivity of the cholesteric liquid crystal 23 wrapped by the thin film coating layer 22 is maintained at more than 85% of the reflectivity of the cholesteric liquid crystal 23 without the addition of curable components. This ensures that the cholesteric liquid crystal 23 has sufficient reflectivity after the curable cholesteric liquid crystal composition is cured, ensuring its excellent reflective performance. This effectively solves the technical problems in related technologies where excessive division and disruption of the helical structure of the cholesteric liquid crystal 23 sacrifices the reflective area, resulting in decreased reflectivity, increased haze, and failure to meet display requirements. It ensures a display effect with high reflectivity and high color purity, which is beneficial to improving the optical efficiency of the display panel 100.

[0084] Since the first substrate 1 provided in step S2 includes a barrier layer 14, and the multiple barriers 141 of the barrier layer 14 surround to form a pixel receiving area 142, adjacent sub-pixels are separated by the barriers 141, and the cholesteric liquid crystal capsules 21 in the pixel receiving area 142 of adjacent sub-pixels do not contact each other and are completely separated by the barriers 141, which can more effectively prevent cross-color and color mixing between adjacent sub-pixels.

[0085] S5: Provide a second substrate 3, attach the second substrate 3 to the first substrate 1 and encapsulate it; wherein the second substrate 3 covers and seals the pixel receiving area 142.

[0086] Specifically, after curing the curable cholesteric liquid crystal composition to form a cholesteric liquid crystal capsule 21, a second substrate 3 is provided, and the second substrate 3 is bonded to the first substrate 1 and encapsulated.

[0087] In this embodiment, the second substrate 3 covers and seals the pixel receiving area 142. Specifically, the entire surface of the second substrate 3 covers the side of the barrier layer 14 of the first substrate 1 away from the first substrate 11, and the second substrate 3 seals the port of the pixel receiving area 142 of the first substrate 1. In one specific embodiment, the surface of the second substrate 3 near the first substrate 1 abuts against the barrier layer 14.

[0088] It is understood that by covering and sealing the pixel accommodating area 142 of the first substrate 1 with the second substrate 3, the barrier layer 14 and the second substrate 3 work together to prevent the cholesteric liquid crystal capsules 21 in different pixel accommodating areas 142 from spreading laterally or moving, thus avoiding color mixing or cross-contamination.

[0089] Meanwhile, because the thin film coating layer 22 of the cholesteric liquid crystal capsule 21 encapsulates the cholesteric liquid crystal 23, the cholesteric liquid crystal 23 is not excessively segmented or disordered, and the encapsulated cholesteric liquid crystal 23 is not easily leaked out or flowed. Even if there is a small gap between the second substrate 3 and the barrier layer 14, the cholesteric liquid crystal 23 encapsulated by the thin film coating layer 22 will not be subjected to the capillary force of the gap between the second substrate 3 and the barrier layer 14 and will not undergo lateral diffusion or movement. This can further prevent the cholesteric liquid crystal 23 used to reflect different colors of light from mixing due to lateral flow, and can further improve the purity and quality of the displayed image and improve the display effect.

[0090] In some embodiments, the second substrate 3 includes a second substrate 31 and a second electrode layer 32. The second substrate 31 is a transparent substrate; for example, the material of the second substrate 31 can be glass. The second electrode layer 32 serves as a common electrode layer and is a transparent electrode layer; for example, the material of the second electrode layer 32 is ITO (indium tin oxide). It is understood that since both the second substrate 31 and the second electrode layer 32 are transparent materials, ambient light can be incident from one side of the second substrate 3 onto the cholesteric liquid crystal capsules 21 within the pixel accommodating area 142, so that the cholesteric liquid crystal 23 in different pixel accommodating areas 142 reflects different colors of light, thereby achieving full-color display.

[0091] In this embodiment, a curable cholesteric liquid crystal composition is prepared, injected into the pixel receiving area 142, and cured. This curable component of the curable cholesteric liquid crystal composition is cured to form a thin film coating layer 22 that encapsulates the cholesteric liquid crystal 23. This completely eliminates the risk of the cholesteric liquid crystal 23 moving and diffusing under the capillary force between the barrier layer 14 of the second substrate 3 and the first substrate 1, which is beneficial to achieving a high-yield single-cell full-color cholesteric liquid crystal display panel. The above method avoids excessive segmentation and disruption of the helical structure of the cholesteric liquid crystal 23, thus maximizing the protection of the integrity of the helical structure of the cholesteric liquid crystal 23. It achieves a large-size cholesteric liquid crystal 23 with a regular helical structure, effectively preventing the flow of the cholesteric liquid crystal 23 while ensuring its excellent reflective display performance, and ensuring a display effect with high reflectivity and high color purity. It effectively solves the problems of easy movement and diffusion of cholesteric liquid crystal in electronic paper display panels, which leads to color mixing of cholesteric liquid crystal in adjacent sub-pixels, and the problem of reduced reflectivity and affected image display effect due to the segmentation and disruption of the helical structure of the cholesteric liquid crystal, thus effectively improving the display effect.

[0092] See Figure 5 The second embodiment of this application provides a display panel 100, which is prepared by the preparation method of the display panel 100 described in any of the above embodiments.

[0093] Specifically, the display panel 100 includes a first substrate 1, a second substrate 3, and a cholesteric liquid crystal layer 2 disposed between the first substrate 1 and the second substrate 3. The first substrate 1 includes a first substrate 11, a driving circuit layer 12, a first electrode layer 13, and a barrier layer 14 stacked together. The barrier layer 14 includes a plurality of barriers 141, which surround and form a plurality of pixel receiving areas 142.

[0094] The cholesteric liquid crystal layer 2 includes at least three types of cholesteric liquid crystal capsules 21. Specifically, at least three types of cholesteric liquid crystal capsules 21 are disposed within multiple pixel accommodating areas 142, with only one type of cholesteric liquid crystal capsule 21 disposed within each pixel accommodating area 142. Each type of cholesteric liquid crystal capsule 21 includes only one type of cholesteric liquid crystal 23. The cholesteric liquid crystal 23 of different cholesteric liquid crystal capsules 21 can reflect different colors of light. The cholesteric liquid crystal capsules 21 within adjacent pixel accommodating areas 142 are separated by a barrier wall 141, which can more effectively prevent color mixing between adjacent sub-pixels.

[0095] In one specific embodiment, the cholesteric liquid crystal layer 2 of the display panel 100 may include three types of cholesteric liquid crystal capsules 21, specifically including a first cholesteric liquid crystal, a second cholesteric liquid crystal, and a third cholesteric liquid crystal. The first cholesteric liquid crystal reflects red light, the second cholesteric liquid crystal reflects green light, and the third cholesteric liquid crystal reflects blue light, thereby facilitating full-color display. In other embodiments, the display panel 100 may also include cholesteric liquid crystals 23 for reflecting other colors of light, which can be specifically designed as needed.

[0096] The second substrate 3 is bonded to the barrier layer 14, and the second substrate 3 covers and seals the pixel receiving area 142. In some embodiments, the second substrate 3 includes a second substrate 31 and a second electrode layer 32. The second substrate 31 is a transparent substrate, for example, the second substrate 31 can be a glass substrate. The second electrode layer 32 serves as a common electrode layer. Specifically, the second electrode layer 32 is a transparent electrode layer, for example, the material of the second electrode layer 32 is ITO (indium tin oxide). It can be understood that the second substrate 31 and the second electrode layer 32 are both transparent materials, which allows ambient light to enter the cholesteric liquid crystal capsule 21 in the pixel receiving area 142 from one side of the second substrate 3, so that the cholesteric liquid crystal 23 in the cholesteric liquid crystal capsule 21 in different pixel receiving areas 142 reflects different colors of light, thereby realizing full-color display.

[0097] It is understood that the display panel 100 provided in this application embodiment is prepared using the preparation method of the display panel 100 provided in the first embodiment. The curable component of the curable cholesteric liquid crystal composition is cured to form a thin film coating layer 22 that encapsulates the cholesteric liquid crystal 23. The cholesteric liquid crystal 23 is encapsulated by the thin film coating layer 22 to form a capsule-shaped cholesteric liquid crystal capsule 21, and is confined within the corresponding pixel receiving area 142 by the barrier wall 141. Even if a gap exists between the second substrate 3 and the barrier wall 141 due to the limitations of microfabrication and encapsulation technology, the cholesteric liquid crystal 23 encapsulated by the thin film coating layer 22 is not easy to flow into the pixel receiving area 142 of the adjacent sub-pixel. The cholesteric liquid crystal 23 is encapsulated and is not easy to move laterally and diffuse, effectively avoiding color mixing or cross-coloring of different color sub-pixels. This addresses the issue of improving the purity and quality of the displayed image. Simultaneously, the curable component, after curing, forms a continuous thin-film coating layer 22. The cholesteric liquid crystal 23 is encapsulated by the thin-film coating layer 22 to form a capsule-shaped cholesteric liquid crystal capsule 21. The helical structure of the cholesteric liquid crystal 23 is not easily divided or disrupted, maximizing the preservation of its large size and regular helical structure. This protects the integrity of the helical structure of the cholesteric liquid crystal 23, effectively preventing its flow while ensuring its excellent reflective display performance. This ensures a display effect with high reflectivity and high color purity, effectively avoiding the problems in related technologies where excessive division and disruption of the helical structure of the cholesteric liquid crystal to prevent its flow leads to decreased reflectivity, increased haze, dull and blurry display effects, and failure to meet the requirements of electronic paper displays. The display panel 100 prepared by the above-described method effectively solves the problems of cholesteric liquid crystal easy movement and diffusion leading to cholesteric liquid crystal color mixing in adjacent sub-pixels in electronic paper display panels, and the reduction in reflectivity due to the segmentation and disruption of the helical structure of cholesteric liquid crystal, which affects the display effect. This is beneficial to improving the display effect.

[0098] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for manufacturing a display panel, characterized in that, include: Prepare at least three curable cholesteric liquid crystal compositions; wherein each of the curable cholesteric liquid crystal compositions comprises a curable component, a curing initiator, and a cholesteric liquid crystal; A first substrate is provided; wherein the first substrate includes a first substrate, a driving circuit layer, a first electrode layer and a barrier layer stacked sequentially; the barrier layer includes a plurality of barriers, and the plurality of barriers surround to form a plurality of pixel accommodating areas; At least three of the curable cholesteric liquid crystal compositions are injected into a plurality of the pixel accommodating regions using an inkjet printing process, with one of the curable cholesteric liquid crystal compositions injected into each pixel accommodating region. The curable cholesteric liquid crystal composition within the pixel accommodating area is cured to form a thin film coating layer, which encapsulates the cholesteric liquid crystal to form a cholesteric liquid crystal capsule. A second substrate is provided, and the second substrate is bonded and packaged with the first substrate; wherein the second substrate covers and seals the pixel accommodating area.

2. The method for manufacturing a display panel according to claim 1, characterized in that, The step of preparing at least three curable cholesteric liquid crystal compositions specifically includes: Three identical nematic liquid crystal substrates are provided, and a chiral dopant is added to each of the nematic liquid crystal substrates to prepare three cholesteric liquid crystals; wherein, different types of cholesteric liquid crystals can reflect different colors of light; in the three cholesteric liquid crystals, the chiral dopant is the same type, and the mass ratio of the chiral dopant is 1:1.5:

2. One part by weight of each cholesteric liquid crystal is uniformly mixed with 7-8 parts by weight of the curable component and 1-2 parts by weight of the curing initiator to form the curable cholesteric liquid crystal composition.

3. The method for manufacturing a display panel according to claim 1, characterized in that, The curing initiator is a photocuring initiator; The step of curing the curable cholesteric liquid crystal composition within the pixel accommodating area specifically includes: The first substrate is placed in an inert gas environment and irradiated with ultraviolet light with an intensity of 48mW / cm²-52mW / cm² for 55S-65S; the wavelength of the ultraviolet light is 360nm-370nm; wherein the inert gas includes nitrogen.

4. The method for manufacturing a display panel according to claim 3, characterized in that, The photocuring initiator includes phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

5. The method for manufacturing a display panel according to claim 1, characterized in that, The curing initiator is a thermosetting initiator; The step of curing the curable cholesteric liquid crystal composition within the pixel accommodating area specifically includes: The first substrate is placed in an inert gas environment and heated using a heating device at a temperature of 35°C-45°C for 12-18 minutes; wherein the inert gas includes nitrogen.

6. The method for manufacturing a display panel according to claim 5, characterized in that, The thermosetting initiator includes benzoyl peroxide or azobisisobutyronitrile.

7. The method for manufacturing a display panel according to claim 1, characterized in that, The curable component includes any one or more of polyethylene glycol diacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, N-vinylpyrrolidone, hydrophilic polyurethane acrylate, acryloyloxy compounds, or vinyl compounds.

8. The method for manufacturing a display panel according to claim 1, characterized in that, After curing the curable cholesteric liquid crystal composition within the pixel accommodating area, the resulting thin film coating layer is gel-like.

9. The method for manufacturing a display panel according to claim 1, characterized in that, After curing the curable cholesteric liquid crystal composition within the pixel accommodating area, the reflectivity of the cholesteric liquid crystal in the cholesteric liquid crystal capsule is greater than or equal to 85% of the reflectivity of the cholesteric liquid crystal without the addition of the curable component.

10. A display panel, characterized in that, The display panel is formed using the display panel manufacturing method as described in any one of claims 1-8; The display panel includes a first cholesteric liquid crystal, a second cholesteric liquid crystal, and a third cholesteric liquid crystal; the first cholesteric liquid crystal reflects red light, the second cholesteric liquid crystal reflects green light, and the third cholesteric liquid crystal reflects blue light; the cholesteric liquid crystal capsules in two adjacent pixel accommodating areas are separated by the barrier. The second substrate includes a second substrate and a second electrode layer; the second substrate is a transparent substrate and the second electrode layer is a transparent electrode layer.

Images