Liquid crystal display panel and preparation method thereof
By filling the display material mixed with photonic crystals and liquid crystal molecules in the sub-pixel opening of the liquid crystal display panel, the problems of low contrast, high thickness and weight of the existing liquid crystal display panel are solved, and the thinning and performance improvement of the liquid crystal display panel is achieved.
Patent Information
- Application Number
- CN202510240413.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-06-06
AI Technical Summary
The display contrast of existing LCD display panels is not high, the thickness and weight are relatively large, making it difficult to meet the needs of emerging LED displays.
The display material mixed with photonic crystals and liquid crystal molecules is filled in the sub-pixel opening, and the filtering of specific energy rays is achieved through the photonic crystal, replacing the filter, simplifying the process, and reducing thickness and weight.
It realizes the lightness and thinness of the LCD panel, improves the display brightness and display contrast, reduces manufacturing costs, and enhances the environmental adaptability and durability of the panel.
Smart Images
Figure CN120103648A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure belongs to the field of liquid crystal display technology, and specifically relates to a liquid crystal display panel and a method for preparing the liquid crystal display panel. Background Art
[0002] In the field of display technology, liquid crystal display panels have always dominated the flat panel display market due to their advantages such as high resolution, low power consumption, and no radiation. However, with the rapid development of various emerging LED displays (i.e., light emitting diode displays), the problems of low display contrast, large thickness and weight in existing liquid crystal display panels have become increasingly prominent. Summary of the invention
[0003] The embodiments of the present disclosure provide a liquid crystal display panel and a method for preparing the liquid crystal display panel, by filling a display material mixed with photonic crystals and liquid crystal molecules in a sub-pixel opening to filter light while reducing the setting of filters, thereby reducing the thickness and quality of the liquid crystal display panel and improving the display effect of the liquid crystal display panel.
[0004] The present disclosure provides a liquid crystal display panel, including:
[0005] An array substrate, comprising a substrate, a separation layer and at least one display material, wherein the separation layer is formed on the substrate and has a plurality of sub-pixel openings that are spaced apart and arranged in an array, and each of the sub-pixel openings is filled with one of the display materials;
[0006] A packaging substrate, formed on a side of the separation layer away from the substrate, so as to package the display material in the sub-pixel opening;
[0007] The display material includes liquid crystal molecules and photonic crystals mixed with each other. In the display state, the liquid crystal molecules in the display material are in a light-transmitting state, and the photonic crystals in the display material allow light of corresponding energy to pass through when the liquid crystal molecules are in the light-transmitting state, so as to achieve the transmission of light of corresponding color.
[0008] In an exemplary embodiment of the present disclosure, a plurality of array-arranged pit structures are disposed on the surface of the packaging substrate close to the separation layer, and the pit structure has an arc-shaped surface that is arched upward toward a side away from the separation layer; the pit structures are disposed in a one-to-one correspondence with the sub-pixel openings.
[0009] In an exemplary embodiment of the present disclosure, the liquid crystal display panel further includes a polarizer, wherein:
[0010] The polarizer is disposed on a side of the packaging substrate away from the array substrate; or,
[0011] The polarizer is arranged on a side of the array substrate away from the packaging substrate.
[0012] In an exemplary embodiment of the present disclosure, the liquid crystal display panel includes at least two different display materials, wherein different types of photonic crystals are arranged in different types of display materials, and the different types of photonic crystals are configured to allow light of different energies to pass through.
[0013] In an exemplary embodiment of the present disclosure, the partition layer is made of a light absorbing material, and the sub-pixel opening is arranged through the partition layer; or,
[0014] The depth of the sub-pixel opening is smaller than the depth of the partition layer, and the partition layer is made of a reflective material.
[0015] The present disclosure provides a method for preparing a liquid crystal display panel, the method comprising:
[0016] providing a substrate;
[0017] forming a separation layer on the substrate, wherein the separation layer has a plurality of sub-pixel openings arranged in an array;
[0018] Obtaining a display material, and filling the display material in each of the sub-pixel openings to form an array substrate; wherein the display material includes liquid crystal molecules and photonic crystals mixed with each other; in a display state, the liquid crystal molecules in the display material are in a light-transmitting state, and the photonic crystals in the display material allow light of corresponding energy to pass through when the liquid crystal molecules are in the light-transmitting state, so as to achieve light of corresponding color passing through;
[0019] Providing a packaging substrate;
[0020] The encapsulation substrate is disposed on a side of the separation layer away from the substrate to encapsulate the display material in the sub-pixel opening.
[0021] In an exemplary embodiment of the present disclosure, the method for obtaining display material includes:
[0022] Weighing the crystal powder of the photonic crystal and adding it to the anhydrous ethanol solution to prepare a mixed solution of a preset concentration;
[0023] The mixed solution is homogenized, and then the mixed solution is filtered to remove impurities in the mixed solution;
[0024] Adding liquid crystal molecules into the mixed solution from which impurities have been removed, and performing a homogenization treatment so that the liquid crystal molecules and the photonic crystals are evenly arranged in the mixed solution;
[0025] The mixed solution after adding the liquid crystal molecules is subjected to evaporation treatment to remove the anhydrous ethanol in the mixed solution and form the display material.
[0026] In an exemplary embodiment of the present disclosure, the preset concentration means that the concentration of the photonic crystals in the mixed solution is 5wt%-10wt%.
[0027] In an exemplary embodiment of the present disclosure, before filtering the mixed solution, the step of homogenizing the mixed solution comprises: subjecting the mixed solution to ultrasonic treatment until the photonic crystals are free of adhesion and are uniformly dispersed in the anhydrous ethanol solution; and / or,
[0028] The step of evaporating the mixed solution after adding the liquid crystal molecules comprises: placing the mixed solution after adding the liquid crystal molecules in an environment of a preset temperature, stirring the mixed solution to evaporate and remove the anhydrous ethanol in the mixed solution; and / or,
[0029] The step after forming the display material and before adding the display material into the sub-pixel opening includes: performing a degassing treatment on the display material to remove bubbles in the display material.
[0030] In an exemplary embodiment of the present disclosure, the method for preparing the packaging substrate includes:
[0031] Providing a substrate material, and cleaning the substrate material;
[0032] Arranging a positioning material on the substrate material, and etching the positioning material to form a positioning piece of a preset shape, wherein the orthographic projection of the positioning piece on the substrate material coincides with the orthographic projection of the separation layer on the substrate material;
[0033] Etching the substrate material according to the position of the positioning member to form a plurality of pit structures arranged in an array and spaced apart from each other on a side surface of the substrate material close to the positioning member;
[0034] Removing the positioning piece on the substrate material to produce the packaging substrate;
[0035] Among them, when the packaging substrate is arranged on the side of the separation layer away from the substrate, the pit structure is located on the surface of the packaging structure close to the separation layer; the pit structure has an arc-shaped surface, and the arc-shaped surface is arched upward toward the side away from the separation layer; the pit structure on the packaging substrate is arranged one-to-one with the sub-pixel opening.
[0036] The technical solution provided by the embodiments of the present disclosure has at least the following advantages:
[0037] The embodiment of the present disclosure fills the display material mixed with photonic crystals and liquid crystal molecules into each sub-pixel opening, so that while adjusting the light transmittance through the liquid crystal molecules, the photonic crystals are used to filter light of specific energy. That is, the display material in the embodiment of the present disclosure has the function of filtering light of specific energy, so that the display material can be used to replace the filter in the related technology to simplify the preparation process of the liquid crystal display panel, reduce the thickness and weight of the liquid crystal display panel, realize the thinness of the liquid crystal display panel, and reduce its manufacturing cost.
[0038] At the same time, there is interaction between the photonic crystal and the liquid crystal molecules. The ordered structure of the photonic crystal provides a stable framework for the liquid crystal molecules, so that the liquid crystal molecules can maintain a more stable arrangement and orientation when the temperature changes, thereby enhancing its durability and temperature stability in actual use. Therefore, the liquid crystal display panel in the embodiment of the present disclosure can have stronger environmental adaptability and can ensure normal use under extreme outdoor conditions, thereby improving the market competitiveness of the liquid crystal display panel and expanding its market share.
[0039] In addition, after the photonic crystal allows light of a specific energy to pass through, other light that cannot pass through can be reflected back to the light emitting structure in the form of reflection, and then the light emitting structure can reflect these lights back to the photonic crystal again. Due to the effects of coherent diffraction and multiple reflections generated on the surface of the photonic crystal, the energy of the light can be changed, thereby reaching the condition that it can be transmitted. Compared with the technical solution of filtering light through a filter, the technical solution of filtering light through a photonic crystal disclosed in the present invention can further improve the utilization rate of the light source, thereby improving the display brightness and display contrast of the liquid crystal display panel, and can reduce the energy consumption of the light emitting structure, thereby reducing the use cost of the liquid crystal display panel.
[0040] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.
[0041] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0043] Figure 1 A schematic structural diagram of a liquid crystal display panel in the related art is shown.
[0044] Figure 2 A schematic structural diagram of a liquid crystal display panel in an embodiment of the present disclosure is shown.
[0045] Figure 3 A schematic diagram of the structure of specific functional groups on the surface of liquid crystal molecules in an embodiment of the present disclosure is shown.
[0046] Figure 4 A schematic structural diagram of the pit structure in an embodiment of the present disclosure is shown.
[0047] Figure 5 A locally enlarged structural schematic diagram of the pit structure in the embodiment of the present disclosure is shown.
[0048] Figure 6 A schematic structural diagram of a polarizer in an embodiment of the present disclosure is shown.
[0049] Figure 7 Another structural schematic diagram of the polarizer in the embodiment of the present disclosure is shown.
[0050] Figure 8 A schematic structural diagram of a separation layer in an embodiment of the present disclosure is shown.
[0051] Fig. 9 Shown in Figure 8 Schematic diagram of the structure in which a polarizer is arranged in a liquid crystal display panel.
[0052] Fig.10 A schematic diagram of the process of a method for preparing a liquid crystal display panel in an embodiment of the present disclosure is shown.
[0053] Fig.11 A schematic diagram of the structure of disposing a separation material on a substrate according to an embodiment of the present disclosure is shown.
[0054] Fig.12 The embodiment of the present disclosure is shown by Fig.11 Schematic diagram of the structure for preparing and forming a separation layer.
[0055] Fig.13 A schematic diagram of the structure of a separation layer made of reflective material in an embodiment of the present disclosure is shown.
[0056] Fig.14 A schematic structural diagram of a frame in an embodiment of the present disclosure is shown.
[0057] Fig.15 A schematic flow chart of a method for obtaining display materials in an embodiment of the present disclosure is shown.
[0058] Fig.16 A schematic diagram of the structure in which the photonic crystals in the embodiment of the present disclosure are uniformly distributed in an anhydrous ethanol solution is shown.
[0059] Fig.17 A schematic diagram of the structure for removing impurities from a mixed solution in an embodiment of the present disclosure is shown.
[0060] Fig.18 A schematic diagram of the structure after homogenization of the photonic crystals and liquid crystal molecules in the mixed solution in an embodiment of the present disclosure is shown.
[0061] Fig.19 A schematic diagram of the structure of the display material obtained after evaporation treatment in an embodiment of the present disclosure is shown.
[0062] Fig. 20 A schematic flow chart of a method for preparing a packaging substrate in an embodiment of the present disclosure is shown.
[0063] Fig.21 A schematic structural diagram of arranging positioning material on a substrate material in an embodiment of the present disclosure is shown.
[0064] Fig. 22 A schematic diagram of the structure of a positioning member formed by etching in an embodiment of the present disclosure is shown.
[0065] Fig.23 A schematic diagram of a pit structure formed by etching in an embodiment of the present disclosure is shown.
[0066] Fig.24 A schematic diagram of the structure of forming a packaging substrate in an embodiment of the present disclosure is shown.
[0067] Description of reference numerals:
[0068] 1. Liquid crystal display panel; 111. Substrate; 112. Separation layer; 113. Photonic crystal; 114. Liquid crystal molecules; 115. Driving layer; 12. Packaging substrate; 121. Pit structure; 13. Polarizer; 101. First polarizing structure; 102. First substrate; 104. Liquid crystal layer; 105. Filter layer; 106. Second substrate; 107. Second polarizing structure; 2. Backlight source; 31. Separation material; 4. Mask plate; 5. Filter layer; 6. Substrate material; 71. Positioning material; 72. Positioning piece; 8. Frame. DETAILED DESCRIPTION
[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.
[0070] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0071] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. 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 understood as limiting the present application.
[0072] The main structure of the currently mass-produced liquid crystal display panel includes: backlight source, array substrate, color filter substrate, polarizer and liquid crystal layer between the array substrate and the color filter substrate. In order to improve the display effect of the liquid crystal display panel, technicians in this field have also proposed some improvement schemes, such as: setting a filter or color converter in the liquid crystal display panel to filter the light. However, these schemes are usually implemented by adding additional structural layers to the existing structure of the liquid crystal display panel, and the prepared product is thicker.
[0073] For details, please refer to Figure 1 As shown, Figure 1 It is a liquid crystal display panel in the related art. Specifically, Figure 1 The structural layers from bottom to top include: a first polarizing structure 101, a first substrate 102, a driving layer 115, a liquid crystal layer 104, a filter layer 105, a second substrate 106, and a second polarizing structure 107. Among them, the liquid crystal layer 104 is filled with liquid crystal molecules 114, and the filter layer 105 includes a filter. The liquid crystal display panel 1 is provided with a backlight source 2 on the side of the first polarizing structure 101 away from the first substrate 102. Although the liquid crystal display panel can use a filter to filter specific energy light, the setting of the filter will increase the overall thickness and weight of the liquid crystal display panel. Therefore, there is an urgent need for a new design scheme that can reduce or avoid the increase of its thickness and weight while improving the contrast of the liquid crystal display panel.
[0074] like Figure 2 As shown, the present disclosure provides a liquid crystal display panel 1, which may include an array substrate and a packaging substrate 12, wherein the array substrate and the packaging substrate 12 are arranged in a box-like manner.
[0075] The array substrate may include a substrate 111, a partition layer 112 and at least one display material, wherein the partition layer 112 is formed on the substrate 111, and the partition layer 112 has a plurality of sub-pixel openings that are spaced apart and arranged in an array, and each sub-pixel opening is filled with a display material. The encapsulation substrate 12 is formed on a side of the partition layer 112 away from the substrate 111 to encapsulate the display material in the sub-pixel opening.
[0076] In the embodiment of the present disclosure, the display material may include liquid crystal molecules 114 and photonic crystals 113 that are mixed with each other. In the display state, the liquid crystal molecules 114 in the display material are in a light-transmitting state, and the photonic crystals 113 in the display material allow light of corresponding energy to pass through when the liquid crystal molecules 114 are in the light-transmitting state, so as to achieve the transmission of light of corresponding color.
[0077] Specifically, the liquid crystal molecules 114 are a material state between crystals and liquids, and have good optical anisotropy and electro-optical properties. The liquid crystal molecules 114 have a certain orderly arrangement in space, but at the same time have fluidity, which enables the liquid crystal molecules 114 to change their orientation under the influence of external conditions (such as electric field, magnetic field, temperature, etc.), thereby achieving the regulation of the light transmission state.
[0078] The photonic crystal 113 has a one-dimensional to three-dimensional periodic structure, which makes it impossible for light of certain energy (wavelength) to be transmitted in the photonic crystal 113, forming a so-called photonic bandgap. This orderly structural arrangement plays a key role in the reflection and propagation of light, and can ensure that light maintains efficient propagation within a specific wavelength range. At the same time, the photonic crystal 113 is a new type of optical microstructure material whose dielectric constant varies periodically with space. By adjusting the structural parameters and material parameters of the photonic crystal 113, including the lattice spacing, crystal orientation and the refractive index of the material, the color of the photonic crystal 113 can be adjusted.
[0079] The embodiment of the present disclosure fills the display material mixed with photonic crystal 113 and liquid crystal molecule 114 in each sub-pixel opening, and can use the liquid crystal molecule 114 to achieve the control of the light transmission state, and can also use the photonic crystal 113 to achieve the filtering of light of specific energy. That is, the present disclosure can adjust the display brightness and display contrast of the liquid crystal display panel 1 through the display material. Therefore, the display material in the present disclosure can replace the filter in the relevant liquid crystal display panel 1 to reduce the thickness and weight of the liquid crystal display panel 1, and can reduce the production cost. In addition, the structural color of the photonic crystal 113 has the advantages of high color saturation, high brightness, and no light bleaching, and is more suitable for display applications than pigment color and other structural colors such as thin film interference and total internal reflection.
[0080] like Figure 3As shown, since the surface of the liquid crystal molecules 114 has specific functional groups, and these functional groups or molecular structures can interact with the surface or internal structure of the photonic crystal 113, the liquid crystal molecules 114 and the photonic crystal 113 have good compatibility. When the photonic crystal 113 is mixed with the liquid crystal molecules 114, the introduction of the liquid crystal molecules 114 does not significantly destroy the ordered structure of the photonic crystal 113, but can further enhance the stability of the photonic crystal 113 through the fluidity and tunability of the liquid crystal molecules 114, so as to help the photonic crystal 113 remain stable when facing environmental changes.
[0081] Specifically, the operating temperature range of the liquid crystal molecules 114 is limited. Usually, the liquid crystal molecules 114 become unstable when the temperature is below -10°C and above 70°C. This is because temperature changes affect the arrangement and orientation of the liquid crystal molecules 114, thereby affecting their optical properties. The photonic crystal 113 has a highly ordered and periodic structure, and this structural characteristic enables it to maintain a certain stability in the face of temperature changes. The ordered arrangement and structure can ensure that the reflection and propagation of light remain efficient within a specific wavelength range, thereby enhancing the overall performance of the material and its performance in applications. At the same time, by doping different elements or compounds, the optical properties and mechanical strength of the photonic crystal 113 can be adjusted, and a reasonable doping strategy will enable it to have better temperature stability. When the liquid crystal is mixed with the photonic crystal 113, due to the high stability of the photonic crystal 113, the display material can resist the influence of temperature fluctuations on the liquid crystal molecules 114 to a certain extent.
[0082] That is to say, in the display material, there is an interaction between the photonic crystal 113 and the liquid crystal molecules 114, and the ordered structure of the photonic crystal 113 provides a stable framework for the liquid crystal molecules 114, so that the liquid crystal molecules 114 can maintain a more stable arrangement and orientation when the temperature changes, thereby enhancing its durability and temperature stability in actual use. Therefore, the liquid crystal display panel 1 in the embodiment of the present disclosure can have stronger environmental adaptability, and can also ensure normal use under extreme outdoor conditions, thereby expanding the application of the liquid crystal display panel 1 in various display technology fields such as outdoor billboards.
[0083] It should also be noted that the liquid crystal molecules 114 and the photonic crystals 113 in the display material of the present disclosure can be uniformly mixed. At this time, the liquid crystal molecules 114 are filled in the gaps between the photonic crystals 113. Due to the interaction between the photonic crystals 113 and the liquid crystal molecules 114, the display material can form a more compact structure. Compared with the technical solution of setting a structural layer for the photonic crystals 113 and the liquid crystal molecules 114 separately, the embodiment of the present disclosure can reduce the overall occupied space of the liquid crystal molecules 114 and the photonic crystals 113 by setting the photonic crystals 113 in the gaps between the liquid crystal molecules 114 (or, setting the liquid crystal molecules 114 in the gaps between the photonic crystals 113), thereby reducing the thickness of the liquid crystal display panel 1.
[0084] In some embodiments, the liquid crystal display panel 1 may include at least two different display materials, wherein different types of display materials are provided with different types of photonic crystals 113 , and the different types of photonic crystals 113 are configured to allow light of different energies to pass through.
[0085] Specifically, three different display materials can be set in the liquid crystal display panel 1, one display material is provided with a photonic crystal 113 that allows red light to pass through, one display material is provided with a photonic crystal 113 that allows green light to pass through, and another display material is provided with a photonic crystal 113 that allows blue light to pass through. The three different display materials are filled in different sub-pixel openings respectively. After the light is filtered by different types of photonic crystals 113, the liquid crystal display panel 1 can achieve color display. Among them, the three different display materials can be filled in three adjacent sub-pixel openings in the order of red, green, and blue. However, it is not limited to this. The three different display materials in the embodiment of the present disclosure can also be arranged in other regular or irregular ways, which can be set according to actual conditions.
[0086] It should be noted that the wavelength range of the backlight source currently used is in the entire visible light region, that is, about 400nm-780nm. When a filter is used to select light of a specific wavelength, the filter achieves the purpose of color rendering by absorbing and selectively passing light.
[0087] For example, when the filter can only pass a certain wavelength of light, the rest of the wavelengths will be absorbed by it, thus achieving the purpose of color selection. Since the wavelength range of each single color emission accounts for a small proportion of the entire wavelength range, for the backlight source, only a small part of the light can pass through the color film filter and be used, resulting in a very low backlight utilization rate.
[0088] In the embodiment of the present disclosure, after the photonic crystal 113 allows light with a specific energy to pass through, other light that cannot pass through can be reflected to the light emitting structure, and then the light emitting structure can reflect the light to the photonic crystal 113 again.
[0089] For example, when the liquid crystal display panel 1 has a backlight source, the light emitting structure can be the backlight source. At this time, after the light that cannot be transmitted by the photonic crystal 113 is reflected to the backlight source, these light rays can be reflected again to the photonic crystal 113 through the reflective layer on the surface of the backlight source. Due to the effects of coherent diffraction and multiple reflections generated on the surface of the photonic crystal 113, the energy of the light can be changed, thereby reaching the condition that it can be transmitted. Compared with the technical solution of filtering light through a filter, the technical solution of filtering light through the photonic crystal 113 disclosed in the present invention can further improve the utilization rate of the light source, thereby improving the display brightness and display contrast of the liquid crystal display panel 1, and can reduce the energy consumption of the light emitting structure, thereby reducing the use cost of the liquid crystal display panel 1.
[0090] In combination with the above, the embodiment of the present disclosure can control the deflection angle of the liquid crystal molecules 114 by filling the display material mixed with the photonic crystal 113 and the liquid crystal molecules 114 in the sub-pixel opening, thereby adjusting the light transmittance. The present disclosure can utilize the periodic structure of the photonic crystal 113 to filter the light of a specific color, thereby realizing the color display of the liquid crystal display panel 1. The liquid crystal molecules 114 are compatible with the photonic crystal 113. When the liquid crystal molecules 114 are mixed with the photonic crystal 113, the liquid crystal molecules 114 can be filled in the gaps between the photonic crystals 113. While improving the problem of the overall thickness of the liquid crystal display panel 1, the temperature stability and durability of the liquid crystal molecules 114 can also be improved, thereby expanding the adaptability of the liquid crystal display panel 1 to the external ambient temperature. In addition, compared with the technical solution of achieving filtering through a filter, the technical solution of the present disclosure using the photonic crystal 113 in the display material to achieve filtering can also reduce the setting of the filter, so as to reduce the thickness and weight of the liquid crystal display panel 1 and achieve lightness and thinness. At the same time, the present disclosure can also improve the utilization rate of the light source, thereby improving the display brightness and display contrast of the liquid crystal display panel 1, and can reduce the energy consumption of the light emitting structure, thereby reducing the use cost of the liquid crystal display panel 1.
[0091] In some embodiments, the surface of the separation layer 112 facing away from the substrate 111 may be in direct contact with the surface of the packaging substrate 12 facing the array substrate.
[0092] In the embodiment of the present disclosure, the packaging substrate 12 may be a glass substrate. Compared with the technical solution of using a color filter substrate including structural layers such as a filter, a black matrix, and a flat layer to set up a box with an array substrate, the embodiment of the present disclosure can use the display material in the sub-pixel opening for filtering, and thus can omit the setting of structural layers such as filters, black matrix, and flat layer, thereby reducing the thickness, weight, and manufacturing cost of the liquid crystal display panel 1. However, it is not limited thereto, and the packaging substrate 12 may also be made of other light-transmitting materials other than glass, which may be determined according to actual conditions.
[0093] like Figure 4 As shown, in some embodiments, a plurality of array-spaced pit structures 121 may be provided on the surface of the packaging substrate 12 close to the separation layer 112 , and the pit structure 121 has an arc-shaped surface that arches upward toward the side away from the separation layer 112 .
[0094] The orthographic projection of the pit structure 121 on the partition layer 112 may be located within each sub-pixel opening, or the orthographic projection of the pit structure 121 on the substrate 111 may coincide with the orthographic projection of the corresponding sub-pixel opening on the substrate 111 .
[0095] The packaging substrate 12 is light-transmissive. At this time, each pit structure 121 of the packaging substrate 12 can form a concave lens that is thin in the middle and thick at the edges. When light enters the packaging substrate 12 from the sub-pixel opening, the medium through which the light passes changes, and the refractive indexes of the two media are different. When the light enters from one medium to another, it will refract, that is, change its propagation direction. Since the pit structure 121 on the packaging substrate 12 is a light-transmissive structure that is thin in the middle and thick at the edges, the light will become divergent after passing through the pit structure 121. The principle can be referred to Figure 5 Therefore, in the embodiment of the present disclosure, by providing the pit structure 121 on the packaging substrate 12 , the light emission angle can be enlarged, thereby increasing the viewing angle of the liquid crystal display panel 1 .
[0096] In some embodiments, the pit structure 121 can be set in a one-to-one correspondence with the sub-pixel opening, but is not limited to this. The embodiment of the present disclosure can also make the pit structure 121 correspond to some sub-pixel openings in the separation layer 112, which can be set specifically according to actual conditions.
[0097] In some embodiments, the liquid crystal display panel 1 may further include a polarizer 13 .
[0098] For example, Figure 6 As shown, the polarizer 13 may be disposed on a side of the packaging substrate 12 that is away from the array substrate. The polarizer 13 may cover a side of the packaging substrate 12 that is away from the array substrate.
[0099] But not limited to this, such as Figure 7As shown, the polarizer 13 may also be disposed on a side of the array substrate away from the packaging substrate 12. The polarizer 13 may cover a side of the array substrate away from the packaging substrate 12.
[0100] It should be noted that, at the interface of the medium, due to the interaction between light (electromagnetic field) and matter, not only the propagation direction of light will change, but also its vibration state will change. Therefore, natural light can produce polarized light through reflection and refraction, and the imaging using polarizer 13 in the liquid crystal display panel 1 is based on this principle. Generally speaking, two polarizers 13 are provided in the liquid crystal display panel 1, one of which is the lower polarizer 13, which can convert the infusion generated by the backlight source 2 into polarized light. The other is the upper polarizer 13, which can analyze the polarized light after the liquid crystal is electrically modulated to produce light and dark contrast, thereby producing a display picture.
[0101] In the embodiment of the present disclosure, the photonic crystal 113 can change the polarization state of light, so the display material made of the photonic crystal 113 and the liquid crystal molecule 114 can be used to replace one of the two polarizers 13, and another polarizer 13 is set in the liquid crystal display panel 1. Compared with the technical solution of directly setting two polarizers 13 in the liquid crystal display panel 1, the embodiment of the present disclosure can reduce the setting of one polarizer 13, thereby simplifying the process flow of the liquid crystal display panel 1, reducing the manufacturing cost, and at the same time, reducing the thickness of the liquid crystal display panel 1.
[0102] In some embodiments, the sub-pixel opening may be disposed through the partition layer 112. Figure 2 shown.
[0103] At this time, the partition layer 112 can be made of a light-absorbing material such as Cr (chromium), CrOx (chromium oxide) or resin, but is not limited thereto. The partition layer 112 can also be made of a reflective material. When the liquid crystal display panel 1 includes a variety of display materials, the partition layer 112 can improve the problem of cross-color between adjacent sub-pixel openings filled with different display materials.
[0104] In some embodiments, the depth of the sub-pixel opening may also be smaller than the depth of the partition layer 112 .
[0105] For example, Figure 8 As shown, the side of the sub-pixel opening facing away from the substrate 111 can be flush with the side of the partition layer 112 facing away from the substrate 111, and the side of the sub-pixel opening close to the substrate 111 can be higher than the side of the partition layer 112 close to the substrate 111. At this time, the sub-pixel opening is U-shaped as a whole.
[0106] In the embodiment of the present disclosure, the partition layer 112 can be made of a reflective material, which can have strong reflectivity and a low refractive index. When light is irradiated into the sub-pixel opening, the light can be completely reflected by the reflective material, thereby realizing image display while improving display brightness. The liquid crystal display panel 1 in the embodiment of the present disclosure is a reflective liquid crystal display panel 1, which realizes image display by reflecting ambient light, omitting the backlight source 2, thereby reducing the use cost of the liquid crystal display panel 1.
[0107] It should be noted that by compactly designing the structure or doping the reflective material, its reflectivity can reach close to 100%. Therefore, when the liquid crystal display panel 1 includes multiple display materials, the separation layer 112 made of reflective material can also improve the problem of cross-color between adjacent sub-pixel openings filled with different display materials.
[0108] When the liquid crystal display panel 1 is a reflective liquid crystal display panel 1 and a polarizer 13 is provided in the liquid crystal display panel 1, a layer of polarizer 13 may be attached in the direction of light incidence. Fig. 9 shown.
[0109] refer to Fig.10 As shown, the present disclosure also provides a method for preparing a liquid crystal display panel, which may include:
[0110] S1. Provide a substrate.
[0111] In some embodiments, the substrate 111 is light-transmissive at least in the region corresponding to each sub-pixel opening, so that light can pass through the substrate 111 and irradiate into the sub-pixel opening.
[0112] For example, the substrate 111 can be made of transparent glass. When the backlight source 2 is disposed on the side of the substrate 111 away from the partition layer 112 or on at least one side of the substrate 111 in its extension direction, the light emitted by the backlight source 2 can penetrate the substrate 111 and irradiate into the sub-pixel opening.
[0113] Of course, if the liquid crystal display panel 1 is a reflective liquid crystal display panel 1 that does not require a backlight source 2 , the substrate 111 in the embodiment of the present disclosure may also be made of an opaque material.
[0114] S2. Form a separation layer on the substrate, wherein the separation layer has a plurality of sub-pixel openings arranged in an array.
[0115] In some embodiments, a layer of separation material 31 may be coated on the substrate 111. The separation material 31 may completely cover the corresponding side of the substrate 111, but is not limited thereto. The separation material 31 may also cover a portion of the corresponding side of the substrate 111. The separation material 31 is vacuum dried and pre-baked to form a structure. Fig.11 Then, as Fig.12 As shown, a mask plate 4 may be disposed on the side of the separation material 31 facing away from the substrate 111 , and the separation layer 112 may be prepared by exposing, developing and curing the separation material 31 .
[0116] For example, the separation material 31 in the embodiment of the present disclosure may be a light absorbing material.
[0117] In some embodiments, a layer of reflective material may be coated on the substrate 111. When the reflective material is baked and shaped, a mask plate with a convex shape may be placed above the display area. For details, see Fig.13 As shown, to ensure that the reflective material forms Fig.13 The U-shaped partition layer 112 can separate each sub-pixel opening. The reflective material can be a reflective photonic crystal solution.
[0118] In some embodiments, before forming the separation layer 112 , a frame 8 surrounding the display area may be formed on the substrate 111 .
[0119] It should be noted that the substrate 111 may include a display area and a non-display area, and the sub-pixel opening is located in the display area. Fig.14 As shown, before forming the partition layer 112, a layer of photoresist material can be coated on the substrate 111, and after vacuum drying and pre-baking and finalization, exposure, development and curing processes, the preparation of the frame 8 can be completed. The inside of the frame 8 corresponds to the display area on the substrate 111. The frame 8 can support the packaging substrate 12 and the substrate 111 of the liquid crystal display panel 1, and can also improve the problem of overflow of display materials during the preparation process. When preparing the partition layer 112, the partition layer 112 can be located in the display area surrounded by the frame 8.
[0120] In addition, before forming the separation layer 112 , a driving layer 115 may be formed on the substrate 111 . The driving layer 115 can control the display image of the liquid crystal display panel 1 through signal conversion and control.
[0121] S3. Obtain display material and fill the display material into each sub-pixel opening to form an array substrate; wherein the display material includes liquid crystal molecules and photonic crystals mixed with each other; in a display state, the liquid crystal molecules in the display material are in a light-transmitting state, and the photonic crystals in the display material allow light of corresponding energy to pass through when the liquid crystal molecules are in the light-transmitting state, so as to achieve light of corresponding color passing through.
[0122] Specifically, refer to Fig.15 As shown, the method for obtaining display materials in the embodiment of the present disclosure may include:
[0123] S31, weighing the crystal powder of the photonic crystal, and adding it to the anhydrous ethanol solution to prepare a mixed solution of a preset concentration.
[0124] It should be noted that the preset concentration mentioned above means that the concentration of the photonic crystal 113 in the mixed solution is 5wt%-10wt%.
[0125] For example, the concentration of the photonic crystal 113 in the mixed solution may be 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 10wt%, and so on.
[0126] It should also be noted that there are many types of liquid crystal molecules 114. If a single photonic crystal 113 material is used, the two materials cannot achieve good compatibility. Therefore, the present disclosure can adjust the compatibility between the photonic crystal 113 and the liquid crystal molecules 114 for different types of liquid crystal molecules 114.
[0127] Specifically, in some embodiments, the photonic crystal 113 material having good compatibility with the liquid crystal molecule 114 can be directly selected according to the type of the liquid crystal molecule 114. That is, the photonic crystal 113 having good compatibility with the liquid crystal material in terms of molecular structure and properties can be found through screening and testing.
[0128] However, it is not limited thereto. In some embodiments, the surface of the photonic crystal 113 may be modified, such as by introducing specific functional groups or changing the charge properties of the surface, so that the photonic crystal 113 can more easily interact with the liquid crystal molecules 114, thereby improving the compatibility between the two.
[0129] The disclosed embodiment mixes photonic crystals 113 and liquid crystal molecules 114 with good compatibility in the display material, so as to adjust the light transmittance and display color and improve the overall temperature stability of the display material, thereby expanding the adaptability of the liquid crystal display panel 1 to the external ambient temperature and improving the overall durability and application flexibility of the display material.
[0130] The steps after configuring the mixed solution of the preset concentration may include: S32, homogenizing the mixed solution, and then filtering the mixed solution to remove impurities in the mixed solution.
[0131] It should be noted that the homogenization treatment of the mixed solution in step S32 may refer to ultrasonic treatment of the mixed solution.
[0132] For example, before filtering the mixed solution, the step of homogenizing the mixed solution may include: subjecting the mixed solution to ultrasonic treatment until the photonic crystals 113 are free of adhesion and are uniformly dispersed in the anhydrous ethanol solution. Fig.16 shown.
[0133] In the embodiment of the present disclosure, the mixed solution can be subjected to ultrasonic treatment for 10 minutes. However, the present disclosure is not limited thereto, and the time for the mixed solution to be subjected to ultrasonic treatment in the embodiment of the present disclosure can be adjusted according to specific circumstances.
[0134] In some embodiments, the step of filtering the mixed solution may further include: providing a filter layer 5, pouring the mixed solution onto the filter layer 5, and using the filter layer 5 to filter out excess impurities in the mixed solution to ensure the purity of the photonic crystals 113 in the display material used later. Fig.17 shown.
[0135] The step after removing impurities from the mixed solution may include: S33, adding liquid crystal molecules to the mixed solution from which impurities have been removed, and performing a homogenization process to make the liquid crystal molecules and the photonic crystals evenly arranged in the mixed solution. Fig.18 shown.
[0136] The mixed solution and the liquid crystal molecules 114 are mixed in a certain ratio to ensure that when the display material is used in the liquid crystal display panel 1, the transmittance can be regulated by controlling the electric field, and the photonic crystal 113 can be used to filter the light incident into the corresponding sub-pixel opening.
[0137] The homogenization treatment of the mixed solution in step S33 may refer to ultrasonic treatment of the mixed solution.
[0138] Specifically, in step S33, the mixed solution may be subjected to ultrasonic treatment for 5 minutes. However, the invention is not limited thereto, and the time for ultrasonic treatment of the mixed solution in the embodiment of the present disclosure may be adjusted according to specific circumstances.
[0139] It should be noted that the ultrasonic frequency range during ultrasonic treatment in the embodiments of the present disclosure can be: 20kHz-120kHz, but is not limited thereto. The ultrasonic frequency range can be appropriately relaxed according to the changes in the types of materials in the mixed solution.
[0140] The step after homogenizing the mixed solution containing the photonic crystal 113 and the liquid crystal molecules 114 may include: S34, evaporating the mixed solution after adding the liquid crystal molecules to remove anhydrous ethanol in the mixed solution and form a display material.
[0141] Specifically, the step of evaporating the mixed solution after adding the liquid crystal molecules 114 may include: placing the mixed solution after adding the liquid crystal molecules 114 in an environment with a preset temperature, stirring the mixed solution by a stirrer to evaporate and remove the anhydrous ethanol in the mixed solution. Fig.19 After the anhydrous ethanol is completely volatilized, the display material required in the liquid crystal display panel 1 can be obtained.
[0142] It should be noted that the preset temperature mentioned above refers to a temperature at which the anhydrous ethanol in the mixed solution can evaporate.
[0143] For example, the preset temperature in the embodiment of the present disclosure may be 50°C.
[0144] In some embodiments, after forming the display material and before adding the display material into the sub-pixel opening, the step may include: performing a degassing treatment on the display material to remove bubbles in the display material.
[0145] In addition, in some embodiments, after forming the partition layer 112 and before adding the display material into the sub-pixel opening, the step may include: completing a PI (i.e., polyimide film) coating and alignment process on the substrate 111 to help guide the liquid crystal molecules 114 to align in a specific direction.
[0146] The steps after filling the display material in each sub-pixel opening include: S4, providing a packaging substrate.
[0147] Specifically, refer to Fig. 20 As shown, the method for preparing the package substrate 12 may include:
[0148] S41, providing a substrate material, and cleaning the substrate material.
[0149] Specifically, the substrate material 6 can be made of light-transmitting materials such as glass.
[0150] The dirt, grease and impurities on the surface of the substrate material 6 can be removed by ultraviolet rays, spraying and the like to ensure the cleanliness of the surface.
[0151] S42, disposing a positioning material on the substrate material, and etching the positioning material to form a positioning piece of a preset shape, wherein the orthographic projection of the positioning piece on the substrate material coincides with the orthographic projection of the separation layer on the substrate material.
[0152] In the embodiment of the present disclosure, the positioning material 71 can completely cover the corresponding surface of the substrate material 6, such as Fig.21 As shown. The positioning material 71 can be a photosensitive material such as a photoresist material, which is vacuum dried and pre-baked to complete the shaping. Then, as shown in FIG. Fig. 22 As shown, the mask plate 4 and ultraviolet rays or other light sources can be used to expose the positioning material 71 to chemical changes in the positioning material 71 in the area not covered by the mask plate 4, and then the positioning material 71 in the unexposed area is removed using a developer to form a positioning member 72 of a preset shape.
[0153] The steps after forming the positioning member 72 may include: S43, etching the substrate material according to the position of the positioning member to form a plurality of pit structures arranged in an array at intervals on a side surface of the substrate material close to the positioning member. Fig.23 shown.
[0154] In some embodiments, the prepared etching liquid (such as hydrofluoric acid, hydrochloric acid, sodium hydroxide, etc.) can be evenly applied to the side of the substrate material 6 close to the positioning member 72, or the etching liquid can be fully contacted with the side of the substrate material 6 close to the positioning member 72 by immersion, spraying, etc. The surface of the substrate material 6 covered by the positioning member 72 can be avoided from being corroded by the etching liquid, while the surface of the substrate material 6 not covered by the positioning member 72 can be etched by the etching liquid to form a plurality of array-spaced pit structures 121.
[0155] The steps after forming the pit structure 121 may include: S44, removing the positioning pieces on the substrate material to manufacture a packaging substrate.
[0156] When the package substrate 12 is disposed on a side of the partition layer 112 away from the substrate 111, the pit structure 121 is located on the surface of the package structure close to the partition layer 112. The pit structure 121 has an arc-shaped surface, and the arc-shaped surface is arched upward toward the side away from the partition layer 112. The pit structures 121 on the package substrate 12 are arranged in a one-to-one correspondence with the sub-pixel openings.
[0157] Specifically, if Fig.24 As shown, when the positioning material 71 is a photoresist material, the positioning piece 72 on the substrate material 6 can be removed by using a photoresist removal liquid. Next, the substrate material 6 is cleaned to remove impurities such as the photoresist removal liquid, etching liquid and residues on the substrate material 6, and the packaging substrate 12 is obtained.
[0158] The steps after manufacturing the packaging substrate 12 may include: S5, arranging the packaging substrate on a side of the separation layer away from the substrate to encapsulate the display material in the sub-pixel opening.
[0159] Specifically, a sealant may be disposed on the packaging substrate 12 , and the packaging substrate 12 coated with the sealant may be bonded and packaged with the array substrate in a vacuum environment, and then photocured and thermally cured to complete the box-alignment between the array substrate and the packaging substrate 12 .
[0160] For example, the sealant may be disposed on the area between two adjacent pit structures 121 . After assembling, the side of the packaging substrate 12 provided with the pit structure 121 may be directly connected to the side of the separation layer 112 facing away from the substrate 111 .
[0161] In the description of this specification, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features 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.
[0162] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0163] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.
Claims
1. A liquid crystal display panel, characterized in that: include: An array substrate, comprising a substrate, a separation layer and at least one display material, wherein the separation layer is formed on the substrate and has a plurality of sub-pixel openings spaced apart and arranged in an array, and each of the sub-pixel openings is filled with one of the display materials; A packaging substrate, formed on a side of the separation layer away from the substrate, so as to package the display material in the sub-pixel opening; The display material includes liquid crystal molecules and photonic crystals mixed with each other. In the display state, the liquid crystal molecules in the display material are in a light-transmitting state, and the photonic crystals in the display material allow light of corresponding energy to pass through when the liquid crystal molecules are in the light-transmitting state, so as to achieve the transmission of light of corresponding color.
2. The liquid crystal display panel according to claim 1, characterized in that: A plurality of array-arranged pit structures are provided on the surface of the packaging substrate close to the separation layer, wherein the pit structure has an arc-shaped surface, and the arc-shaped surface is arched upward toward a side away from the separation layer; The pit structures are arranged in one-to-one correspondence with the sub-pixel openings.
3. The liquid crystal display panel according to claim 1, characterized in that: The liquid crystal display panel also includes a polarizer, wherein: The polarizer is disposed on a side of the packaging substrate away from the array substrate; or, The polarizer is arranged on a side of the array substrate away from the packaging substrate.
4. The liquid crystal display panel according to claim 1, characterized in that: The liquid crystal display panel includes at least two different display materials, wherein different types of the display materials are provided with different types of photonic crystals, and the different types of photonic crystals are configured to allow light with different energies to pass through.
5. The liquid crystal display panel according to claim 1, characterized in that: The partition layer is made of a light absorbing material, and the sub-pixel opening is arranged through the partition layer; or, The depth of the sub-pixel opening is smaller than the depth of the partition layer, and the partition layer is made of a reflective material.
6. A method for preparing a liquid crystal display panel, characterized in that: The preparation method comprises: providing a substrate; forming a separation layer on the substrate, wherein the separation layer has a plurality of sub-pixel openings arranged in an array; Obtaining a display material, and filling the display material in each of the sub-pixel openings to form an array substrate; wherein the display material includes liquid crystal molecules and photonic crystals mixed with each other; in a display state, the liquid crystal molecules in the display material are in a light-transmitting state, and the photonic crystals in the display material allow light of corresponding energy to pass through when the liquid crystal molecules are in the light-transmitting state, so as to achieve light of corresponding color passing through; Providing a packaging substrate; The encapsulation substrate is disposed on a side of the separation layer away from the substrate to encapsulate the display material in the sub-pixel opening.
7. The preparation method according to claim 6, characterized in that: The method for obtaining the display material comprises: Weighing the crystal powder of the photonic crystal and adding it to the anhydrous ethanol solution to prepare a mixed solution of a preset concentration; The mixed solution is homogenized, and then the mixed solution is filtered to remove impurities in the mixed solution; Adding liquid crystal molecules into the mixed solution from which impurities have been removed, and performing a homogenization treatment so that the liquid crystal molecules and the photonic crystals are evenly arranged in the mixed solution; The mixed solution after adding the liquid crystal molecules is subjected to evaporation treatment to remove the anhydrous ethanol in the mixed solution and form the display material.
8. The preparation method according to claim 7, characterized in that: The preset concentration means that the concentration of the photonic crystals in the mixed solution is 5wt%-10wt%.
9. The preparation method according to claim 7, characterized in that: Before filtering the mixed solution, the step of homogenizing the mixed solution comprises: subjecting the mixed solution to ultrasonic treatment until the photonic crystals are free of adhesion and are uniformly dispersed in the anhydrous ethanol solution; and / or, The step of evaporating the mixed solution after adding the liquid crystal molecules comprises: placing the mixed solution after adding the liquid crystal molecules in an environment of a preset temperature, stirring the mixed solution to evaporate and remove the anhydrous ethanol in the mixed solution; and / or, The step after forming the display material and before adding the display material into the sub-pixel opening includes: performing a degassing treatment on the display material to remove bubbles in the display material.
10. The preparation method according to claim 6, characterized in that: The method for preparing the packaging substrate comprises: Providing a substrate material, and cleaning the substrate material; Arranging a positioning material on the substrate material, and etching the positioning material to form a positioning piece of a preset shape, wherein the orthographic projection of the positioning piece on the substrate material coincides with the orthographic projection of the separation layer on the substrate material; Etching the substrate material according to the position of the positioning member to form a plurality of pit structures arranged in an array and spaced apart from each other on a side surface of the substrate material close to the positioning member; Removing the positioning piece on the substrate material to produce the packaging substrate; Among them, when the packaging substrate is arranged on the side of the separation layer away from the substrate, the pit structure is located on the surface of the packaging structure close to the separation layer; the pit structure has an arc-shaped surface, and the arc-shaped surface is arched upward toward the side away from the separation layer; the pit structure on the packaging substrate is arranged one-to-one with the sub-pixel opening.