Display panel

Abstract

The embodiment of the present application discloses a display panel; the display panel comprises a first substrate and a second substrate arranged oppositely, and a liquid crystal layer between the first substrate and the second substrate; when the display panel is in a first display state, the light absorption axis of a liquid crystal molecule in the liquid crystal layer is parallel to a first direction, the first direction is perpendicular to the plane where the first substrate is located, and the light absorption axis of a dichroic dye molecule in the liquid crystal layer is parallel to the first direction; when the display panel is in a second display state, the light absorption axis of the liquid crystal molecule is inclined relative to the first direction, and the light absorption axis of the dichroic dye molecule is inclined relative to the first direction; the present application controls the inclination degree of the light absorption axis of the dichroic dye relative to the first direction in different display states by using liquid crystal material and dichroic dye, so as to control the display brightness of the panel, thereby realizing the display of the display panel, and improving the response time of the display panel while realizing the full-color display process simply.

Description

Technical Field

[0001] This invention relates to the field of displays, and more specifically to a display panel. Background Technology

[0002] With the advancement of flat panel display technology, more and more electronic products are equipped with display devices, especially portable electronic products such as mobile phones, electronic paper, and digital cameras. Among them, electronic paper is implemented in various ways, including electrophoresis, electrowetting, electronic powder fluid, and cholesteric liquid crystal display. However, these implementation methods have problems such as slow response time and complex full-color implementation processes.

[0003] Therefore, there is an urgent need for a display panel to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a display panel that can alleviate the technical problems of slow response time and complex full-color realization process in current electronic paper display methods.

[0005] This invention provides a display panel, comprising:

[0006] A first substrate and a second substrate disposed opposite to each other;

[0007] A liquid crystal layer is located between the first substrate and the second substrate, and the liquid crystal layer includes a liquid crystal material and a dichroic dye.

[0008] The liquid crystal material includes liquid crystal molecules, and the dichroic dye includes dichroic dye molecules. When the display panel is in a first display state, the light absorption axis of the liquid crystal molecules is parallel to a first direction, the first direction is perpendicular to the plane where the first substrate is located, and the light absorption axis of the dichroic dye molecules is parallel to the first direction. When the display panel is in a second display state, the light absorption axis of the liquid crystal molecules is tilted relative to the first direction, and the light absorption axis of the dichroic dye molecules is tilted relative to the first direction.

[0009] Preferably, the first substrate further includes a first substrate and a pixel electrode layer. The pixel electrode layer is located on the side of the first substrate close to the liquid crystal layer. The display panel includes a plurality of spaced sub-pixel areas. The pixel electrode layer includes pixel electrodes that are disposed one-to-one with the sub-pixel areas. Along the direction from the second substrate to the first substrate, the pixel electrodes cover the first substrate within the sub-pixel areas.

[0010] The second substrate further includes a second substrate and a common electrode layer, wherein the common electrode layer is disposed opposite to the pixel electrode layer;

[0011] The electric field between each pixel electrode and the common electrode layer controls the switching of each sub-pixel region between the first display state and the second display state.

[0012] Preferably, the pixel electrode layer further includes a reflective sub-layer, the reflective sub-layer including a plurality of spaced protrusions, the protrusions being located on the side of the reflective sub-layer closer to the liquid crystal layer, and at least a portion of the protrusions being located within the sub-pixel region.

[0013] Preferably, the pixel electrode layer further includes a first transparent conductive sublayer, which is located on the side of the reflective sublayer closer to the first substrate;

[0014] Wherein, along the direction from the second substrate to the first substrate, the first transparent conductive sublayer covers the first substrate within the sub-pixel region.

[0015] Preferably, the pixel electrode layer further includes a second transparent conductive sublayer, which is located on the side of the reflective sublayer away from the first substrate;

[0016] Wherein, along the direction from the second substrate to the first substrate, the second transparent conductive sublayer covers the reflective sublayer.

[0017] Preferably, the second substrate further includes a color resist layer, which is located between the second substrate and the common electrode layer;

[0018] The color resist layer includes a plurality of color resists, and along the direction from the second substrate to the first substrate, one of the color resists at least partially covers the first substrate within one of the sub-pixel regions.

[0019] Preferably, at least one of the color resists includes a plurality of color resist sub-sections, the plurality of color resist sub-sections being spaced apart along a second direction; and / or,

[0020] The plurality of color resist portions are spaced apart along a third direction, the second direction intersects the third direction, the second direction is parallel to the plane where the second substrate is located, and the third direction is parallel to the plane where the second substrate is located.

[0021] Preferably, the color resist layer further includes a transparent sublayer, which fills the spaces between adjacent color resist portions and covers the side of the color resist portion closest to the liquid crystal layer.

[0022] Preferably, the area of ​​the orthogonal projection of the color resist on the first substrate accounts for more than or equal to 50% of the area of ​​the first substrate within the sub-pixel region, and the area of ​​the orthogonal projection of the color resist on the first substrate accounts for less than or equal to 80% of the area of ​​the first substrate within the sub-pixel region.

[0023] Preferably, the mass fraction of the dichroic dye in the liquid crystal layer is greater than or equal to 1%, and the mass fraction of the dichroic dye in the liquid crystal layer is less than or equal to 3%.

[0024] This invention uses liquid crystal material and dichroic dyes to control the tilt of the light absorption axis of the dichroic dyes relative to the first direction under different display states to control the display brightness of the control panel, thereby realizing the display of the display panel. The full-color display process is simple while improving the response time of the display panel. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of the display panel in the first and second display states provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the first structure of the display panel provided in the embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the second structure of the display panel provided in the embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the first structure of the pixel electrode layer of the display panel provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a second structure of the pixel electrode layer of the display panel provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the color resist portion of a display panel provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0034] Currently, the display methods used in electronic paper and other display products suffer from technical problems such as slow response time and complex processes for achieving full color.

[0035] Please see Figures 1 to 3 This invention provides a display panel 100, comprising:

[0036] The first substrate 101 and the second substrate 102 are disposed opposite to each other;

[0037] A liquid crystal layer 103 is located between the first substrate 101 and the second substrate 102, and the liquid crystal layer 103 includes liquid crystal material and dichroic dye.

[0038] The liquid crystal material includes liquid crystal molecules 104, and the dichroic dye includes dichroic dye molecules 105. When the display panel 100 is in a first display state, the light absorption axis of the liquid crystal molecules 104 is parallel to a first direction Y, which is perpendicular to the plane where the first substrate 101 is located, and the light absorption axis of the dichroic dye molecules 105 is parallel to the first direction Y. When the display panel 100 is in a second display state, the light absorption axis of the liquid crystal molecules 104 is tilted relative to the first direction Y, and the light absorption axis of the dichroic dye molecules 105 is tilted relative to the first direction Y.

[0039] This invention uses liquid crystal material and dichroic dyes to control the tilt of the light absorption axis of the dichroic dyes relative to the first direction Y under different display states, thereby controlling the display brightness of the control panel 100 and realizing the display of the full color. The process of achieving full color is simple, while improving the response time of the display panel 100.

[0040] The technical solution of the present invention will now be described in conjunction with specific embodiments.

[0041] Please see Figure 1 and Figure 3In this embodiment, the light absorption axis of the liquid crystal molecule 104 can be the long axis of the liquid crystal molecule 104, and the light absorption axis of the dichroic dye molecule 105 can also be the long axis of the dichroic dye molecule 105. When the display panel 100 is in the first display state, the light absorption axis of the liquid crystal molecule 104 is parallel to the first direction Y, and the light absorption axis of the liquid crystal molecule 104 is perpendicular to the plane where the first substrate 101 is located. At the same time, when the display panel 100 is in the first display state, the light absorption axis of the dichroic dye molecule 105 is parallel to the first direction Y, and the light absorption axis of the dichroic dye molecule 105 is perpendicular to the plane where the first substrate 101 is located. The absorption of light by the dichroic dye molecules 105 in the liquid crystal layer 103 is minimized (e.g., Figure 1 (As shown in L1 and L2). Therefore, when the display brightness of the display panel 100 is at its maximum, the display panel 100 is in the first display state. It can be understood that when the light absorption axis of the liquid crystal molecule 104 is perpendicular to the plane where the first substrate 101 is located, the angle between the light absorption axis of the liquid crystal molecule 104 and the plane where the first substrate 101 is located is greater than or equal to 80 degrees and less than or equal to 100 degrees, preferably greater than or equal to 87 degrees and less than or equal to 93 degrees, for example, it can be 88 degrees, 89 degrees, 90 degrees, 91 degrees, 92 degrees, etc. It is understood that when the light absorption axis of the dichroic dye molecule 105 is perpendicular to the plane where the first substrate 101 is located, the angle between the light absorption axis of the dichroic dye molecule 105 and the plane where the first substrate 101 is located is greater than or equal to 80 degrees and less than or equal to 100 degrees, preferably greater than or equal to 87 degrees and less than or equal to 93 degrees, for example, it can be 88 degrees, 89 degrees, 90 degrees, 91 degrees, 92 degrees, etc.

[0042] Please see Figure 1 and Figure 2 When the display panel 100 is in the second display state, the light absorption axis of the liquid crystal molecules 104 is tilted relative to the first direction Y, and the light absorption axis of the dichroic dye molecules 105 is also tilted relative to the first direction Y. The different degrees of tilt of the light absorption axis of the dichroic dye molecules 105 relative to the first direction Y control the amount of light absorbed by the dichroic dye molecules 105 within the liquid crystal layer 103, thereby controlling the display brightness of the display panel 100. For example, when the light absorption axis of the dichroic dye molecules 105 is perpendicular to the first direction Y, the absorption of light by the dichroic dye molecules 105 within the liquid crystal layer 103 reaches its maximum (e.g., Figure 1 As shown in L3 and L4, the display panel 100 has the lowest display brightness.

[0043] In some embodiments, the tilt of the light absorption axis of the dichroic dye molecules 105 is controlled by controlling the tilt of the light absorption axis of the liquid crystal molecules 104, thereby controlling the display brightness of the display panel 100. Specifically, when the display panel 100 is in the first display state, the light absorption axis of the liquid crystal molecules 104 is parallel to the first direction Y, and the light absorption axis of the dichroic dye molecules 105 is also parallel to the first direction Y; when the display panel 100 is in the second display state, the tilt of the light absorption axis of the liquid crystal molecules 104 relative to the first direction Y is controlled, so that the light absorption axis of the dichroic dye molecules 105 is also tilted relative to the first direction Y, thereby controlling the display brightness of the display panel 100. The light absorption axis of the dichroic dye molecules 105 is parallel to the light absorption axis of the liquid crystal molecules 104.

[0044] In some embodiments, the dichroic dye is a black dye. For example, the dichroic dye may include one or more compounds of the type such as azo compounds and anthraquinone compounds. Among them, anthraquinone compounds have an anthraquinone structure. The parent nucleus, while azo compounds are those with an azo group. Compounds.

[0045] In some embodiments, the mass fraction of the dichroic dye in the liquid crystal layer 103 is greater than or equal to 1%, and the mass fraction of the dichroic dye in the liquid crystal layer 103 is less than or equal to 3%, for example, it can be 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, etc., so as to control the display brightness of the display panel 100 in different display states.

[0046] The use of the dichroic dye replaces the polarizer structure originally used to control light transmittance, thereby eliminating the corresponding cost of the polarizer and effectively reducing the manufacturing cost of the display panel 100. Simultaneously, when the display panel 100 is applied to an electronic paper display device, compared to the response time of traditional electronic paper displays (1 to 10 seconds), the response time is significantly reduced to 10 to 30 milliseconds by using the liquid crystal layer 103 for display on the display panel 100, significantly improving the response time of the electronic paper display device.

[0047] Please see Figures 1 to 3 In some embodiments, the first substrate 101 further includes a first substrate 106 and a pixel electrode layer 107. The pixel electrode layer 107 is located on the side of the first substrate 106 near the liquid crystal layer 103. The pixel electrode layer 107 includes a plurality of pixel electrodes 107a, which are spaced apart from each other.

[0048] Please see Figure 4 and Figure 5 In some embodiments, the display panel 100 further includes a plurality of sub-pixel regions 115, each corresponding to a pixel electrode 107a. Along the direction from the second substrate 102 to the first substrate 101, the pixel electrode 107a covers the first substrate 106 within the sub-pixel region 115. The direction from the second substrate 102 to the first substrate 101 is perpendicular to the plane containing the first substrate 101. The sub-pixel region 115 is the smallest area within the display panel 100 capable of displaying an image. When the display panel 100 displays an image, the light emitted from the plurality of sub-pixel regions 115 constitutes the display image of the display panel 100.

[0049] Please see Figures 1 to 3 In some embodiments, the pixel electrode layer 107 includes a reflective sublayer 108. The material of the reflective sublayer 108 includes a conductive material with high reflectivity; for example, the material of the reflective sublayer 108 can be selected from silver, which has a light reflectivity of up to 92%. When the first substrate 101 is provided with the reflective sublayer 108, the display surface of the display panel 100 can be located on the side of the second substrate 102 away from the first substrate 101, and the display panel 100 can realize image display by utilizing the reflection of light by the reflective sublayer 108. Therefore, the backlight module and other structures that provide a light source for the image display of the display panel 100 can be omitted, further reducing the manufacturing cost of the display panel 100 and thinning the thickness of the display panel 100.

[0050] In some embodiments, along the direction from the second substrate 102 to the first substrate 101, the reflective sublayer 108 covers the first substrate 106 located within the sub-pixel area 115, so that the reflective sublayer 108 can sufficiently reflect the light reaching the sub-pixel area 115, thereby improving the utilization rate of external light by the display panel 100.

[0051] Please see Figure 5 In some embodiments, the reflective sublayer 108 includes a plurality of protrusions 116, which are located on the side of the reflective sublayer 108 closest to the liquid crystal layer 103, with at least a portion of the protrusions 116 located within the sub-pixel region 115. The protrusions 116 improve the diffuse reflection effect of the reflective sublayer 108 on light, thereby increasing the utilization rate of external light by the display panel 100.

[0052] In some embodiments, the thickness of the protrusion 116 is greater than or equal to 0.1 micrometers, and the thickness of the protrusion 116 is less than or equal to 1 micrometer, for example, it can be 0.2 micrometers, 0.4 micrometers, 0.5 micrometers, 0.6 micrometers, 0.8 micrometers, etc.

[0053] In some embodiments, the orthographic projection of the protrusion 116 on the first substrate 106 can be a polygon such as a triangle, rectangle, or rhombus, or it can be a circle or ellipse. Preferably, the orthographic projection of the protrusion 116 on the first substrate 106 is a circle or an approximately circular ellipse (e.g., the ratio of the major axis to the minor axis is greater than or equal to 1:1 and less than or equal to 1:1.5) to facilitate uniform reflection of light in all directions and improve the diffuse reflection effect of the reflective sublayer 108. The shape of the orthographic projection of the protrusion 116 on the first substrate 106 has a diameter, which is the distance between the two points with the largest distance on the orthographic projection of the protrusion 116 on the first substrate 106. The diameter is greater than or equal to 6 micrometers and less than or equal to 10 micrometers; for example, it can be 6.5 micrometers, 7 micrometers, 7.5 micrometers, 8 micrometers, 8.5 micrometers, 9 micrometers, 9.5 micrometers, etc.

[0054] In some embodiments, the spacing between the orthographic projections of adjacent protrusions 116 on the first substrate 106 is greater than or equal to 10 micrometers and less than or equal to 20 micrometers, for example, it can be 12 micrometers, 14 micrometers, 15 micrometers, 16 micrometers, 18 micrometers, 19 micrometers, etc.

[0055] In some embodiments, each sub-pixel region 115 has a plurality of protrusions 116, and the plurality of protrusions 116 are arranged in an array to fully improve the diffuse reflection effect of the reflective sub-layer 108 on light and improve the utilization rate of the display panel 100 to external light.

[0056] In some embodiments, the reflective sublayer 108 is composed of the protrusions 116, that is, the protrusions 116 are disposed separately from each other.

[0057] Please see Figure 5In some embodiments, the reflective sublayer 108 further includes a connecting portion 117 located on the side of the protrusions 116 near the first substrate 106, and the protrusions 116 are connected through the connecting portion 117. The connecting portion 117 connects multiple protrusions 116, which helps to reduce the resistance of the pixel electrode 107a and reduce the power consumption of the display panel 100. One connecting portion 117 is correspondingly disposed to one sub-pixel region 115. Along the direction from the second substrate 102 to the first substrate 101, the connecting portion 117 covers the first substrate 106 within the sub-pixel region 115, so that the reflective sublayer 108 can fully reflect the light reaching the sub-pixel region 115, thereby improving the utilization rate of external light by the display panel 100.

[0058] In some embodiments, the thickness of the reflective sublayer 108 is greater than or equal to 500 angstroms, and the thickness of the reflective sublayer 108 is less than or equal to 2000 angstroms. For example, it can be 600 angstroms, 700 angstroms, 800 angstroms, 900 angstroms, 1000 angstroms, 1100 angstroms, 1200 angstroms, 1500 angstroms, 1600 angstroms, 1800 angstroms, etc. When the reflective sublayer 108 includes the protrusion 116 and the connecting portion 117, the sum of the thicknesses of the connecting portion 117 and the protrusion 116 is greater than or equal to 500 angstroms, and the sum of the thicknesses of the connecting portion 117 and the protrusion 116 is less than or equal to 2000 angstroms.

[0059] Please see Figure 2 In some embodiments, the pixel electrode layer 107 further includes a first transparent conductive sublayer 109, which is located on the side of the reflective sublayer 108 near the first substrate 106. The first substrate 106 within the sub-pixel region 115 lies within the orthographic projection of the first transparent conductive sublayer 109 onto the first substrate 106. The provision of the first transparent conductive sublayer 109 helps to improve the conductivity of the pixel electrode 107a.

[0060] In some embodiments, the material of the first transparent conductive sublayer 109 may be selected from transparent conductive materials. For example, the material of the first transparent conductive sublayer 109 may include indium tin oxide or other transparent conductive materials.

[0061] In some embodiments, the pixel electrode layer 107 may be composed of the reflective sublayer 108 and the first transparent conductive sublayer 109, and the pixel electrode 107a may be composed of the reflective sublayer 108 and the first transparent conductive sublayer 109.

[0062] Please see Figure 3In some embodiments, the pixel electrode layer 107 further includes a second transparent conductive sublayer 110, which is located on the side of the reflective sublayer 108 away from the first substrate 106. Along the direction from the second substrate 102 to the first substrate 101, the second transparent conductive sublayer 110 covers the reflective sublayer 108. When the pixel electrode layer 107 includes the second transparent conductive sublayer 110, the pixel electrode layer 107 can be composed of the reflective sublayer 108, the first transparent conductive sublayer 109, and the second transparent conductive sublayer 110, and the pixel electrode 107a can be composed of the reflective sublayer 108, the first transparent conductive sublayer 109, and the second transparent conductive sublayer 110. The second transparent conductive sublayer 110 protects the reflective sublayer 108, reducing oxidation and other problems suffered by the reflective sublayer 108.

[0063] In some embodiments, the material of the second transparent conductive layer 110 may be the same as or different from the material of the first transparent conductive layer 109. The material of the second transparent conductive layer 110 may be selected from transparent conductive materials. For example, the material of the second transparent conductive layer 110 may include indium tin oxide or other transparent conductive materials.

[0064] In some embodiments, the first substrate 101 further includes a thin-film transistor layer located between the first substrate 106 and the pixel electrode layer 107. The thin-film transistor layer includes thin-film transistors.

[0065] Please see Figures 1 to 3 In some embodiments, the thin-film transistor includes a gate 118, an active layer 119, a source 120, and a drain 121. The gate 118 is located on the side of the active layer 119 closest to the first substrate 106, while the source 120 and the drain 121 are located on the side of the active layer 119 furthest from the first substrate 106. The source 120 and the drain 121 are respectively connected to the active layer 119. The source 120 and the drain 121 can be disposed on the same layer. The pixel electrode layer 107 is electrically connected to the source 120 or the drain 121, thereby being electrically connected to the thin-film transistor.

[0066] In some embodiments, the materials of the gate 118, the drain 121, and the source 120 may include low-resistance materials such as Al, Ti, Mo, Cu, Ni, or alloys thereof.

[0067] Please see Figures 1 to 3In some embodiments, the thin-film transistor layer further includes a gate insulating layer 122 located between the first gate 118 and the active layer 119. The material of the gate insulating layer 122 may be selected from one or more of silicon oxide and silicon nitride.

[0068] Please see Figures 1 to 3 In some embodiments, the first substrate 101 further includes a passivation layer 123 located between the thin-film transistor layer and the pixel electrode layer 107. The material of the passivation layer 123 may be selected from one or more of silicon oxide and silicon nitride.

[0069] Please see Figures 1 to 3 In some embodiments, the first substrate 101 further includes a planarization layer 124 located between the passivation layer 123 and the pixel electrode layer 107. The material of the planarization layer 124 may be selected from insulating organic materials to planarize the side of the first substrate 101 near the liquid crystal layer 103.

[0070] In some embodiments, the passivation layer 123 includes a first via, and the planarization layer 124 includes a second via, the second via being located within the first via. The first via and the second via expose the source 120 or drain 121 of the thin-film transistor, and a portion of the pixel electrode layer 107 extends into the second via to contact the source 120 or drain 121 of the thin-film transistor.

[0071] Please see Figures 4 to 6 In some embodiments, the thin-film transistor layer further includes intersecting data lines 125 and scan lines 126. Along the direction from the second substrate 102 to the first substrate 101, the sub-pixel region 115 is located between adjacent data lines 125 and adjacent scan lines 126. Pixel electrodes 107a, corresponding one-to-one with the sub-pixel regions 115, are also located between adjacent data lines 125 and adjacent scan lines 126. Along the direction from the second substrate 102 to the first substrate 101, the spacing between the pixel electrode 107a and the data line 125 is greater than 0, and the spacing between the pixel electrode 107a and the scan line 126 is greater than 0.

[0072] In some embodiments, the data line 125 is disposed on the same layer as the source 120 and / or the drain 121, and the scan line 126 is disposed on the same layer as the gate 118.

[0073] In some embodiments, the second substrate 102 includes a second substrate 111 and a color resist layer 112, the color resist layer 112 being located on the side of the second substrate 111 close to the liquid crystal layer 103. Along the direction from the second substrate 102 to the first substrate 101, one of the color resist layers 113 is at least partially located covering the first substrate 106 located within the sub-pixel region 115.

[0074] In some embodiments, the color resist 113 includes a red color resist, a green color resist, and a blue color resist, with one color resist 113 corresponding to one sub-pixel area 115. External light passes through one color resist 113, then through the liquid crystal layer 103 to the reflective sub-layer 108, and after reflection by the reflective sub-layer 108, it passes through the liquid crystal layer 103 and the color resist 113 before exiting, thereby achieving full-color display of the display panel 100.

[0075] Please see Figure 6 In some embodiments, at least one of the color resists 113 includes a plurality of color resist sub-sections 114, which are spaced apart along a second direction X. And / or, the plurality of color resist sub-sections 114 are spaced apart along a third direction Z, where the second direction X intersects the third direction Z, and the second direction X is parallel to the plane containing the second substrate 111, and the third direction Z is parallel to the plane containing the second substrate 111. The spacing between the plurality of color resist sub-sections 114 increases the amount of light that can reach the reflective sublayer 108, which is beneficial for improving the light utilization efficiency of the display panel 100.

[0076] In some embodiments, each of the color resists 113 includes a plurality of color resist sub-sections 114.

[0077] In some embodiments, the second direction X may be parallel to the extension direction of the data line 125, and the third direction Z may be parallel to the extension direction of the scan line 126.

[0078] In some embodiments, when multiple color resist sub-parts 114 are spaced apart, the area of ​​the orthogonal projection of the color resist 113 onto the first substrate 106 accounts for more than or equal to 50% of the area of ​​the first substrate 106 within the sub-pixel region 115, and the area of ​​the orthogonal projection of the color resist 113 onto the first substrate 106 accounts for less than or equal to 80% of the area of ​​the first substrate 106 within the sub-pixel region 115. For example, it can be 55%, 60%, 65%, 70%, 75%, etc., which facilitates improving the light utilization rate of the display panel 100 without affecting the full-color display of the display panel 100.

[0079] In some embodiments, when multiple color resist portions 114 are spaced apart and the reflective sublayer 108 includes multiple protrusions 116, within a subpixel region 115, the density of protrusions 116 located within the orthographic projection of the color resist portion 114 onto the reflective sublayer 108 is less than the density of protrusions 116 located outside the orthographic projection of the color resist portion 114 onto the reflective sublayer 108. That is, within a subpixel region 115, the arrangement of protrusions 116 corresponding to adjacent color resist portions 114 is denser, which is beneficial for coordinating with the spaced arrangement of the color resist portions 114, further improving the diffuse reflection effect of the reflective sublayer 108 on light, and enhancing the utilization rate of external light by the display panel 100.

[0080] Please see Figures 1 to 3 6. In some embodiments, when the color resist 113 includes a plurality of color resist sub-sections 114, the color resist layer 112 further includes a transparent sub-layer 127. The transparent sub-layer 127 fills between adjacent color resist sub-sections 114 and covers the side of the color resist sub-sections 114 near the liquid crystal layer 103, for planarizing the side of the color resist layer 112 near the liquid crystal layer 103. The material of the transparent sub-layer 127 may be selected from transparent optical adhesive materials. The transparent sub-layer 127 may include a filling sub-section and a covering sub-section. The filling sub-section fills between adjacent color resist sub-sections, and the covering sub-section covers the color resist sub-sections and the filling sub-sections on the side near the liquid crystal layer 103.

[0081] Please see Figures 1 to 3 In some embodiments, the color resist layer 112 further includes a black matrix 128, which is spaced apart from adjacent color resists 113. The orthographic projection of the black matrix 128 on the first substrate 106 is located outside the first substrate 106 within the sub-pixel region 115. The orthographic projection of the black matrix 128 on the first substrate 101 surrounds the sub-pixel region 115. The transparent sublayer 127 covers the black matrix 128 and fills the gap between the black matrix 128 and the color resists 113.

[0082] In some embodiments, the display panel 100 has a display area, and the sub-pixel area 115 is located within the display area. The orthographic projection of the black matrix 128 onto the first substrate 101 covers at least a portion of the traces on the first substrate 101. The orthographic projection of the black matrix 128 onto the first substrate 101 covers traces within the display area, such as the data line 125 and the scan line 126 located within the display area.

[0083] In some embodiments, the materials of the first substrate 106 and the second substrate 111 can be rigid materials, such as glass, or flexible materials, such as polyimide.

[0084] Please see Figures 1 to 3 In some embodiments, the second substrate 102 further includes a common electrode layer 129 located on the side of the color resist layer 112 near the liquid crystal layer 103, that is, the color resist layer 112 is located between the common electrode layer 129 and the second substrate 111. The common electrode layer 129 is a transparent electrode layer, and the material of the common electrode layer 129 can be selected from transparent conductive materials, such as indium tin oxide. The common electrode layer 129 includes a common electrode. The common electrode layer 129 is disposed opposite to the pixel electrode layer 107. The electric field between each pixel electrode 107a and the common electrode layer 129 controls the switching of each sub-pixel region 115 between the first display state and the second display state. The electric field between each pixel electrode 107a and the common electrode layer 129 is a vertical electric field. The thin-film transistor is used to adjust the magnitude of the voltage applied to each pixel electrode 107a, and to regulate the electric field strength between each pixel electrode 107a and the common electrode layer 129, thereby controlling each sub-pixel area 115 to switch between the first display state and the second display state.

[0085] When the display panel 100 is in the first display state, there is no voltage difference between the common electrode and the pixel electrode 107a, so that the liquid crystal molecules 104 are perpendicular to the plane of the first substrate 101 and the dichroic dye molecules 105 are perpendicular to the plane of the first substrate 101. The absorption of light by the dichroic dye molecules 105 in the liquid crystal layer 103 is minimized. After the external light passes through the color resist 113, it irradiates the reflective sublayer 108 and is reflected out by the reflective sublayer 108. The display brightness of the display panel 100 reaches its maximum. When the display panel 100 is in the second display state, there is a voltage difference between the common electrode layer 129 and the pixel electrode 107a. The voltage difference between the common electrode layer 129 and the pixel electrode 107a is controlled by the magnitude of the voltage applied to the pixel electrode 107a, thereby regulating the magnitude of the electric field strength between them. This controls the tilt of the liquid crystal molecules 104 and the dichroic dye molecules 105 relative to the first direction Y, allowing the dichroic dye molecules 105 in the liquid crystal layer 103 to absorb light to varying degrees, reducing the amount of light reflected by the reflective sublayer 108 to different degrees. This controls the display panel 100 to achieve different brightness levels. By controlling the voltage applied to the pixel electrode 107a, the display panel 100 can display different colors and images, resulting in a faster response time and eliminating the need for a polarizer. This significantly reduces the manufacturing cost of the display panel 100 while achieving higher brightness.

[0086] Please see Figures 1 to 3 In some embodiments, the display panel 100 further includes a first alignment layer 130 located between the first substrate 101 and the liquid crystal layer 103, and a second alignment layer 131 located between the second substrate 102 and the liquid crystal layer 103. The first alignment layer 130 and the second alignment layer 131 can be alignment layers in a vertical alignment mode, aligned by friction or by ultraviolet polarized light irradiation. The pretilt angle of the liquid crystal molecules 104 is an angle less than or equal to 90 degrees with the plane containing the first substrate 101. The pretilt angle of the liquid crystal molecules 104 is greater than or equal to 80 degrees and less than or equal to 90 degrees; for example, it can be 82 degrees, 84 degrees, 85 degrees, 86 degrees, 87 degrees, 88 degrees, 89 degrees, etc., which is beneficial for the display panel 100 to have better contrast and faster response time. Preferably, the pretilt angle of the liquid crystal molecules 104 is greater than or equal to 87 degrees and less than or equal to 89 degrees.

[0087] The display panel 100 provided in this embodiment of the invention uses liquid crystal material and dichroic dyes to control the tilt of the light absorption axis of the dichroic dyes relative to the first direction Y in different display states to control the display brightness of the panel 100, thereby realizing the display of the full color. The full color realization process is simple, while improving the response time of the display panel 100.

[0088] Please see Figure 7 The present invention also provides a display device 10, including a display panel 100 as described above and a device body 20, wherein the device body 20 and the display panel 100 are combined into one unit.

[0089] For the specific structure of the display panel 100, please refer to any of the above-described embodiments of the display panel 100 and the accompanying drawings, which will not be repeated here.

[0090] In this embodiment, the main body 20 of the device may include a middle frame, frame adhesive, etc., and the display device 10 may be a display terminal such as electronic paper or electronic billboard, which is not limited here.

[0091] This invention discloses a display panel. The display panel includes a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer located between the first substrate and the second substrate. When the display panel is in a first display state, the light absorption axis of the liquid crystal molecules in the liquid crystal layer is parallel to a first direction, which is perpendicular to the plane where the first substrate is located. The light absorption axis of the dichroic dye molecules in the liquid crystal layer is parallel to the first direction. When the display panel is in a second display state, the light absorption axis of the liquid crystal molecules is tilted relative to the first direction, and the light absorption axis of the dichroic dye molecules is tilted relative to the first direction. This invention uses liquid crystal materials and dichroic dyes to control the degree of tilt of the light absorption axis of the dichroic dye relative to the first direction in different display states to control the display brightness of the panel, thereby realizing the display of the display panel. The full-color realization process is simple, while improving the response time of the display panel.

[0092] The above provides a detailed description of a display panel provided by an embodiment of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display panel, characterized in that, include: A first substrate and a second substrate disposed opposite to each other; A liquid crystal layer is located between the first substrate and the second substrate, and the liquid crystal layer includes a liquid crystal material and a dichroic dye. The liquid crystal material comprises liquid crystal molecules, and the dichroic dye comprises dichroic dye molecules. When the display panel is in a first display state, the light absorption axis of the liquid crystal molecules is parallel to a first direction, the first direction is perpendicular to the plane where the first substrate is located, and the light absorption axis of the dichroic dye molecules is parallel to the first direction. When the display panel is in a second display state, the light absorption axis of the liquid crystal molecules is tilted relative to the first direction, and the light absorption axis of the dichroic dye molecules is tilted relative to the first direction. The first substrate further includes a first substrate and a pixel electrode layer. The pixel electrode layer is located on the side of the first substrate near the liquid crystal layer. The display panel includes a plurality of spaced sub-pixel regions. The pixel electrode layer includes pixel electrodes that correspond one-to-one with the sub-pixel regions. The pixel electrode layer further includes a reflective sub-layer. The reflective sub-layer includes a plurality of spaced protrusions. The protrusions are located on the side of the reflective sub-layer near the liquid crystal layer, and at least a portion of the protrusions are located within the sub-pixel regions. The second substrate further includes a second substrate, a common electrode layer, and a color resist layer, wherein the color resist layer is located between the second substrate and the common electrode layer; the color resist layer includes a plurality of color resists, and along the direction from the second substrate to the first substrate, one color resist at least partially covers the first substrate within one of the sub-pixel regions, one color resist is correspondingly disposed to one of the sub-pixel regions, and at least one color resist includes a plurality of color resist sub-parts, the plurality of color resist sub-parts being spaced apart along a second direction; and / or, the plurality of color resist sub-parts being spaced apart along a third direction, the second direction intersecting the third direction, the second direction being parallel to the plane where the second substrate is located, and the third direction being parallel to the plane where the second substrate is located; within one of the sub-pixel regions, the density of the protrusions located within the orthographic projection of the color resist sub-parts on the reflective sub-layer is less than the density of the protrusions located outside the orthographic projection of the color resist sub-parts on the reflective sub-layer.

2. The display panel according to claim 1, characterized in that, Along the direction from the second substrate to the first substrate, the pixel electrode covers the first substrate within the sub-pixel region, and the common electrode layer is disposed opposite to the pixel electrode layer; The electric field between each pixel electrode and the common electrode layer controls the switching of each sub-pixel region between the first display state and the second display state.

3. The display panel according to claim 2, characterized in that, Along the direction from the second substrate to the first substrate, the reflective sublayer covers the first substrate within the sub-pixel region.

4. The display panel according to claim 3, characterized in that, The pixel electrode layer further includes a first transparent conductive sublayer, which is located on the side of the reflective sublayer closer to the first substrate; Wherein, along the direction from the second substrate to the first substrate, the first transparent conductive sublayer covers the first substrate within the sub-pixel region.

5. The display panel according to claim 4, characterized in that, The pixel electrode layer further includes a second transparent conductive sublayer, which is located on the side of the reflective sublayer away from the first substrate; Wherein, along the direction from the second substrate to the first substrate, the second transparent conductive sublayer covers the reflective sublayer.

6. The display panel according to claim 1, characterized in that, The color resist layer further includes a transparent sublayer, which fills the spaces between adjacent color resist portions and covers the side of the color resist portion closest to the liquid crystal layer.

7. The display panel according to claim 1, characterized in that, The area of ​​the orthogonal projection of the color resist on the first substrate accounts for more than or equal to 50% of the area of ​​the first substrate within the sub-pixel region, and the area of ​​the orthogonal projection of the color resist on the first substrate accounts for less than or equal to 80% of the area of ​​the first substrate within the sub-pixel region.

8. The display panel according to claim 1, characterized in that, The mass fraction of the dichroic dye in the liquid crystal layer is greater than or equal to 1%, and the mass fraction of the dichroic dye in the liquid crystal layer is less than or equal to 3%.

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