Display panel and display device

Abstract

The utility model provides a display panel and a display device, and belongs to the technical field of reflective display, the display panel comprises a plurality of pixel regions, each pixel region comprises a plurality of sub-pixel structures, each sub-pixel structure comprises a first substrate, a second substrate and an optical material, the first substrate and the second substrate are oppositely arranged, and the optical material is located between the first substrate and the second substrate. The first substrate comprises a first electrode pattern, the second substrate comprises a second electrode pattern, and the first electrode pattern and the second electrode pattern are at least partially overlapped; the optical material is configured to reflect light or allow the light to pass through under the action of an electric field formed between the first electrode pattern and the second electrode pattern, and the optical materials in different sub-pixel structures in one pixel region are configured to reflect light of different colors; the first structure is arranged on one side, close to the display surface of the display panel, of the pixel area and is configured to adjust the brightness of light reflected by the optical material in the pixel area; and the second structure is configured to adjust the electric fields of different areas in the sub-pixel structure.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] The existing reflective display technology includes electrophoretic display, cholesteric display, electrowetting display, electrochromic display, etc. Among them, the cholesteric display technology can reflect visible light in natural light through cholesteric liquid crystal, thereby realizing display, which does not need a backlight source, has low power consumption, fast response and other characteristics. However, in cholesteric display, the same panel can only display two colors, and the display effect is relatively single. SUMMARY

[0003] Based on the content of the background art, the present disclosure provides a display panel and a display device.

[0004] In a first aspect, a display panel is provided, comprising a plurality of pixel areas (PA), each pixel area (PA) comprising a plurality of sub-pixel structures (P), each sub-pixel structure (P) comprising a first substrate, a second substrate arranged opposite to the first substrate, and an optical material (207) between the first substrate and the second substrate, the first substrate comprising a first electrode pattern (202), the second substrate comprising a second electrode pattern (204), a normal projection of the first electrode pattern (202) on the first substrate and a normal projection of the second electrode pattern (204) on the first substrate at least partially overlapping;

[0005] The optical material (207) is configured to reflect or allow light to pass under the action of an electric field formed between the first electrode pattern (202) and the second electrode pattern (204), and the optical material (207) in different sub-pixel structures (P) in one pixel area (PA) is configured to reflect light of different colors; wherein,

[0006] The display panel further comprises at least one of:

[0007] A first structure (100) is arranged on a side of the pixel area (PA) close to a display surface of the display panel, and is configured to adjust the brightness of light reflected by the optical material (207) in the pixel area (PA);

[0008] A second structure is arranged on the second electrode pattern (204) or the first electrode pattern (202), and is configured to adjust the electric field size of different regions in the sub-pixel structure (P).

[0009] Exemplarily, the first structure (100) comprises:

[0010] a third substrate located on a side of the pixel area (PA) close to the display surface, comprising a third electrode pattern (104);

[0011] a fourth substrate opposite to the third substrate, comprising a fourth electrode pattern (102), a normal projection of the third electrode pattern (104) and the fourth electrode pattern (102) on the third substrate at least partially overlaps, and has a first overlapping area (11);

[0012] a liquid crystal layer (107) located between the third substrate and the fourth substrate, a deflection angle of liquid crystal in the liquid crystal layer (107) is controlled by an electric field between the third electrode pattern (104) and the fourth electrode pattern (102);

[0013] wherein the first overlapping area (11) covers a second overlapping area (22) of a normal projection of the first electrode pattern (202) and the second electrode pattern (204) on the third substrate.

[0014] Exemplarily, the second structure comprises:

[0015] a plurality of sub-electrodes located on a side of the second substrate and spaced apart in a planar direction of the second substrate to form the second electrode pattern (204), the plurality of sub-electrodes are insulated from each other;

[0016] a plurality of thin film transistors respectively connected to the plurality of sub-electrodes, the plurality of thin film transistors are independent and insulated from each other.

[0017] Exemplarily, areas of normal projections of the plurality of sub-electrodes on the second substrate are different.

[0018] Exemplarily, the normal projections of the plurality of sub-electrodes on the second substrate are arranged in a regular pattern.

[0019] Exemplarily, areas of the normal projections of the plurality of sub-electrodes on the second substrate satisfy a linear variation relationship.

[0020] Exemplarily, the plurality of sub-electrodes comprise a first sub-electrode (241), a second sub-electrode (242) and a third sub-electrode (243), an area of a normal projection of the first sub-electrode (241) on the second substrate is smaller than an area of a normal projection of the third sub-electrode (243) on the second substrate, the area of the normal projection of the third sub-electrode (243) on the second substrate is smaller than an area of a normal projection of the second sub-electrode (242) on the second substrate;

[0021] The second sub-electrode (242) comprises a first area (2421), a second area (2422) and a third area (2423) located at opposite sides of the first area (2421) respectively, the first sub-electrode (241) is located between the first area (2421) and the second area (2422), and the third sub-electrode (243) is located between the first area (2421) and the third area (2423).

[0022] Exemplarily, the plurality of sub-pixel structures (P) in the pixel area (PA) comprise a blue sub-pixel structure (P1), a red sub-pixel structure (P3) and a green sub-pixel structure (P2).

[0023] The area ratio corresponding to the first sub-electrode (241) in the red sub-pixel structure (P3) is greater than the area ratio corresponding to the first sub-electrode (241) in the blue sub-pixel structure (P1) and less than the area ratio corresponding to the first sub-electrode (241) in the green sub-pixel structure (P2).

[0024] The area ratio corresponding to the third sub-electrode (243) in the red sub-pixel structure (P3) is greater than the area ratio corresponding to the third sub-electrode (243) in the green sub-pixel structure (P2) and less than the area ratio corresponding to the third sub-electrode (243) in the blue sub-pixel structure (P1).

[0025] The area ratio corresponding to the second sub-electrode (242) in the red sub-pixel structure (P3) is equal to the area ratio corresponding to the second sub-electrode (242) in the green sub-pixel structure (P2) and greater than the area ratio corresponding to the second sub-electrode (242) in the blue sub-pixel structure (P1).

[0026] Exemplarily, the total areas of the orthographic projections of the second electrode patterns (204) on the first substrate in the plurality of sub-pixel structures (P) are the same.

[0027] Exemplarily, the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the plane direction of the display surface, or the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface.

[0028] Exemplarily, the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface, and the overlapping area between the orthographic projections of the first electrode pattern (202) and the second electrode pattern (204) on the second substrate is a second overlapping area (22).

[0029] The second overlap regions (22) of the plurality of sub-pixel structures (P) in one pixel area (PA) are overlapped with each other, and the spacing between the outer contours of the plurality of second overlap regions (22) is less than 5 μm.

[0030] The plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the planar direction of the display surface, and the overlap region between the orthographic projections of the first electrode pattern (202) and the second electrode pattern (204) on the third substrate is a second overlap region (22).

[0031] The isolation wall (400) is arranged between any two adjacent sub-pixel structures (P), and the orthographic projection of the isolation wall (400) on the first substrate encloses the second overlap region (22).

[0032] The first structure (100) is corresponded to a single sub-pixel structure (P) when the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the planar direction of the display surface.

[0033] The first structure (100) is corresponded to a single pixel area (PA) when the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface.

[0034] The first structure (100) is corresponded to a single pixel area (PA) when the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface.

[0035] In a second aspect, the display panel is applied to a display device.

[0036] The display panel provided by the embodiments of the present disclosure comprises a display structure, the display structure comprises a plurality of pixel areas, each pixel area can comprise a plurality of sub-pixel structures, each sub-pixel structure comprises a first substrate, a second substrate and an optical cavity between the first substrate and the second substrate, the optical cavity comprises an optical material, the first substrate comprises a first electrode pattern, the second substrate comprises a second electrode pattern, the orthographic projection of the first electrode pattern on the first substrate and the orthographic projection of the second electrode pattern on the first substrate at least partially overlap, wherein the optical material is configured to reflect or allow light to pass under the action of an electric field formed between the first electrode pattern and the second electrode pattern, and the optical material in the plurality of sub-pixel structures in one pixel area is configured to reflect light of different colors. The display panel can further comprise a first structure (100) and / or a second structure, the first structure (100) can adjust the brightness of the light reflected by the pixel area, and the second structure can adjust the electric field size of different regions in the sub-pixel structure.

[0037] In this way, in the case of the first structure 100, the brightness of the reflected light of each pixel area can be changed, so that the gray scale adjustment of the pixel area can be realized, so that the same color can realize different brightness display, and the picture display quality is optimized; in the case of the second structure, the second structure can change the reflectivity of the optical material to the color light in the sub-pixel structure by adjusting the electric field size of different areas in the sub-pixel structure, so as to realize the gray scale adjustment of the color. In summary, through the first structure 100 and the second structure, in the case of realizing color display in the reflective display panel, the gray scale change of the pixel area granularity or even the sub-pixel structure granularity can be realized through the optical adjustment of the pixel area granularity or even the sub-pixel structure granularity, so as to improve the display color richness of the reflective display technology, avoid single color display, and optimize the display picture quality.

[0038] The above description is only a summary of the technical solutions of the present disclosure. In order to more clearly understand the technical means of the present disclosure, the contents of the specification can be implemented, and in order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0040] Figures 1-3 The plane schematic diagrams of several display panels of the embodiments of the present disclosure are shown respectively;

[0041] Figure 4 The plane schematic diagram of the display panel is shown; Figure 1 The cross-sectional structure schematic diagram of the display panel is shown;

[0042] Figure 5A The plane schematic diagram of the display panel is shown; Figure 5B The cross-sectional structure schematic diagram of the display panel is shown; Figure 2 The cross-sectional structure schematic diagram of the display panel is shown;

[0043] Figure 6 The plane schematic diagram of the display panel is shown; Figure 3 The cross-sectional structure schematic diagram of the display panel is shown;

[0044] Figure 7 The plane schematic diagram of the pixel area PA is shown; Figure 4 The plane schematic diagram of the pixel area PA is shown;

[0045] Figures 8-10A plan view of the three second structures is shown respectively;

[0046] Figure 11 The area ratio of the sub-electrodes in different sub-pixel structures P in the pixel area PA is shown;

[0047] Figure 12 The results of the Test cell test. DETAILED DESCRIPTION

[0048] In order to make the above objectives, features and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0049] In the present specification, "electrically connected" and "coupled" include a case where constituent elements are connected together through an element having some electrical effect. The element having some electrical effect is not particularly limited as long as it can perform the transmission and reception of electrical signals between the connected constituent elements. Examples of the element having some electrical effect include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, other elements having various functions, and the like.

[0050] In the present specification, "parallel" means a state in which the angle formed by two straight lines is -10° or more and 10° or less, and thus also includes a state in which the angle is -5° or more and 5° or less. In addition, "perpendicular" means a state in which the angle formed by two straight lines is 80° or more and 100° or less, and thus also includes a state in which the angle is 85° or more and 95° or less.

[0051] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" is to be construed as an open, inclusive meaning, i.e., as "comprising, but not limited to".

[0052] The "same layer" in the embodiments of the present application refers to the relationship between multiple film layers formed by the same material after the same step (for example, one patterning process). The "same layer" here does not always mean that the thicknesses of the multiple film layers are the same or that the heights of the multiple film layers in the cross-sectional view are the same. The polygons in the present specification are not strictly in the sense that they can be approximate triangles, parallelograms, trapezoids, pentagons, or hexagons, etc., and there can be some small deformations caused by tolerances.

[0053] In the embodiments of the present application, the source and the drain of the transistor are symmetrical, and thus the source and the drain can be interchangeable. In the embodiments of the present application, one of the source and the drain of the transistor can be referred to as a first electrode, and the other of the source and the drain can be referred to as a second electrode.

[0054] In the related art, the cholesteric liquid crystal is a bistable liquid crystal, and the cholesteric liquid crystal can be switched between a P state and an FC state by adjusting a driving voltage, so as to realize display of colors. However, this display mode can realize color display, but cannot realize multi-gray scale display, and the display effect is relatively single.

[0055] Therefore, the embodiments of the present disclosure provide a reflective display panel and a display device including the same. The reflective display panel can adjust the gray scale of the display color of the pixel area and / or the sub-pixel structure by adjusting the brightness of the light reflected by the first structure 100 in the pixel area PA and / or the reflectivity of the optical material 207 in different regions of the sub-pixel structure P, thereby optimizing the types of display colors and realizing color multi-gray scale display.

[0056] Next, the display panel and the display device will be described by way of example with reference to the accompanying drawings.

[0057] First, the cholesteric liquid crystal will be introduced.

[0058] The cholesteric liquid crystal has a layered structure. The molecules in the layers are arranged similarly to the nematic liquid crystal, and the long axes of the molecules in the layers are parallel to each other, but the directions of the axes of the molecules in different layers are slightly offset, forming a helical structure. This special helical structure makes the cholesteric liquid crystal have negative birefringence, optical rotation, selective light scattering, circularly polarized light dichroism, and other optical properties.

[0059] The bistable property of the cholesteric liquid crystal can be realized by surface treatment or addition of polymers. By the method of surface stabilization or polymer stabilization, the cholesteric liquid crystal can be made into a reflective bistable liquid crystal display.

[0060] The cholesteric liquid crystal has a Bragg reflection bright state with a planar state texture (P state) and a scattering dark state with a focal conic state texture (FC state). For example, when the cholesteric liquid crystal is in the FC state, it can be used for transmissive display, allowing light to pass through; when the cholesteric liquid crystal is in the P state, it can reflect visible light, realizing reflective display.

[0061] In some embodiments, please refer to the accompanying drawings of the present disclosure Figures 1-6 shown in the accompanying drawings, Figures 1-3 the plane schematic diagrams of several display panels of the embodiments of the present disclosure are shown respectively, Figure 4 theFigure 1 a cross-sectional structure diagram of a display panel, Figure 5A and Figure 5B a cross-sectional structure diagram of a display panel is shown, Figure 2 a cross-sectional structure diagram of a display panel, Figure 6 a cross-sectional structure diagram of a display panel is shown, Figure 3 a cross-sectional structure diagram of a display panel.

[0062] As Figures 1-3 shown, the display panel in the embodiment includes a plurality of pixel areas PA, each of which can include a plurality of sub-pixel structures P, wherein the plurality of pixel areas PA can be arranged in an array in the plane direction of the display panel, which can include a rectangular array arrangement, a ring array arrangement, etc. The rectangular array arrangement refers to the arrangement of the plurality of pixel areas PA in rows and columns, and the ring array arrangement refers to the arrangement of the plurality of pixel areas PA into a plurality of concentric rings, such as an elliptical ring, a circular ring, etc.

[0063] As Figures 4-6 shown, each sub-pixel structure P in each pixel area PA can include a first substrate, a second substrate arranged opposite to the first substrate, and an optical material 207 between the first substrate and the second substrate, the first substrate including a first electrode pattern 202, and the second substrate including a second electrode pattern 204, the orthographic projection of the first electrode pattern 202 on the first substrate and the orthographic projection of the second electrode pattern 204 on the first substrate at least partially overlapping.

[0064] Among them, the optical material 207 is configured to reflect or allow light to pass under the action of the electric field formed between the first electrode pattern 202 and the second electrode pattern 204, and the optical material 207 in the plurality of sub-pixel structures P in one pixel area PA is configured to reflect light of different colors.

[0065] As Figures 1-3 described, the display panel can include a display area AA, which includes a plurality of pixel areas PA. Among them, the pixel area PA can include a plurality of sub-pixel structures P, different sub-pixel structures P correspond to different reflection colors, in one example, the pixel area PA can include three sub-pixel structures P, such as Figures 4-6 shown, respectively, a sub-pixel structure P reflecting green light, a sub-pixel structure P reflecting blue light, and a sub-pixel structure P reflecting red light.

[0066] As Figures 4-6As shown, each sub-pixel structure P may include a first substrate and a second substrate disposed opposite to each other. The first substrate may include a first substrate 201 and a first electrode pattern 202 located on the side of the first substrate 201 near the optical material 207. The second substrate may include a second substrate 206 and a second electrode pattern 204 located on the side of the second substrate 206 near the optical material 207. The first substrate 201, the second substrate 206, the first electrode pattern 202 and the second electrode pattern 204 may be transparent, that is, the first substrate 201, the second substrate 206, the first electrode pattern 202 and the second electrode pattern 204 are light-transmitting.

[0067] The first substrate 201 and the second substrate 206 can be glass substrates.

[0068] The first electrode pattern 202 and the second electrode pattern 204 can be formed using conductive materials, such as metal materials or metal oxide materials. When using metal oxide materials, indium tin oxide (ITO) can be selected.

[0069] like Figures 4-6 As shown, the orthographic projection of the first electrode pattern 202 on the first substrate 201 at least partially overlaps with the orthographic projection of the second electrode pattern 204 on the first substrate 201. This overlap can mean that: the outer contour of the orthographic projection of the first electrode pattern 202 on the first substrate 201 coincides with the outer contour of the orthographic projection of the second electrode pattern 204 on the first substrate 201; the orthographic projection of the first electrode pattern 202 on the first substrate 201 partially overlaps with the orthographic projection of the second electrode pattern 204 on the first substrate 201; or the orthographic projection of the first electrode pattern 202 on the first substrate 201 covers the orthographic projection of the second electrode pattern 204 on the first substrate 201.

[0070] like Figures 4-6 As shown, the first substrate may further include a first signal line (not shown) located on one side of the first substrate 201 and connected to the first electrode pattern 202, and the second substrate may further include a second signal line DL located on one side of the second substrate 206 and connected to the second electrode pattern 204. The first signal line may be on the same layer as the first electrode pattern 202 or on a different layer. When on the same layer, the first signal line and the first electrode pattern 202 can be formed using a single patterning process. The second signal line DL may be on the same layer as the second electrode pattern 204 or on a different layer. When on the same layer, the second signal line DL and the second electrode pattern 204 can be formed using a single patterning process.

[0071] like Figures 4-6As shown, one side of the first substrate can be provided with a first chip (not shown in the figure), and one side of the second substrate can be provided with a second chip 205. The pins of the first chip are connected to the first signal lines, for outputting control signals to the first signal lines. The pins of the second chip 205 are connected to the second signal lines DL, for outputting control signals to the second signal lines DL.

[0072] In one example, the first electrode pattern 202 can cover the first substrate 201 entirely, so that the plurality of sub-pixel structures P can share the same first electrode pattern 202, or the first electrode patterns 202 in the plurality of sub-pixel structures P are separated from each other, and the first signal lines connected to the plurality of first electrode patterns 202 are connected to the same pin of the first chip. Correspondingly, the second electrode patterns 204 in the plurality of sub-pixel structures P can be connected to independent second signal lines DL, i.e., the second signal lines DL of the plurality of second electrode patterns 204 are connected to different pins of the second chip 205. In this way, the first electrode pattern 202 can serve as a common electrode in the sub-pixel structure P, and the second electrode pattern 204 can serve as a control electrode in the sub-pixel structure P. The first electrode pattern 202 and the second electrode pattern 204 overlap each other, so that a vertical electric field perpendicular to the first substrate and the second substrate can be formed between the first substrate and the second substrate.

[0073] In another example, the second electrode pattern 204 can cover the first substrate 201 entirely, so that the plurality of sub-pixel structures P can share the same second electrode pattern 204, or the second electrode patterns 204 in the plurality of sub-pixel structures P are separated from each other, and the second signal lines DL connected to the plurality of second electrode patterns 204 are connected to the same pin of the second chip 205. Correspondingly, the first electrode patterns 202 in the plurality of sub-pixel structures P can be connected to independent first signal lines, i.e., the first signal lines of the plurality of first electrode patterns 202 are connected to different pins of the second chip 205. In this way, the second electrode pattern 204 can serve as a common electrode in the sub-pixel structure P, and the first electrode pattern 202 can serve as a control electrode in the sub-pixel structure P. A vertical electric field perpendicular to the first substrate and the second substrate can also be formed between the first substrate and the second substrate.

[0074] It should be noted that, Figure 4 The first electrode pattern 202 is taken as a common electrode in the sub-pixel structure P, and the second electrode pattern 204 is taken as a control electrode in the sub-pixel structure P as an example for illustrative description.

[0075] The vertical electric field formed between the first electrode pattern 202 and the second electrode pattern 204 can drive the reflective state of the optical material 207 located between the first substrate and the second substrate, which can be a cholesteric liquid crystal, and the thickness of the optical material 207 filled between the first substrate and the second substrate can be proportional to the center wavelength of the visible light to be reflected by the optical material 207.

[0076] Exemplarily, as shown in Figure 4 The filling thickness of the optical material 207 in the red light reflecting sub-pixel structure P is greater than that in the green light reflecting sub-pixel structure P, and the filling thickness of the optical material 207 in the green light reflecting sub-pixel structure P is greater than that in the blue light reflecting sub-pixel structure P.

[0077] This is because, when the cholesteric liquid crystal is driven to the reflective state, it can reflect natural light of the corresponding wavelength according to the Bragg reflection principle, thereby displaying the corresponding color, and the reflection wavelength satisfies λ=Δn*P, where λ is the reflection wavelength, Δn is the average refractive index, and P is the pitch, which represents the corresponding layer thickness of the liquid crystal molecule long axis pointing to one revolution. The reflection wavelength λ of the liquid crystal is proportional to the pitch. In order to match the reflection wavelength and achieve better optical effect, the pitch of the liquid crystal needs to be proportional to the cell thickness (i.e. the filling thickness of the optical material 207), and the longer the pitch, the greater the required cell thickness.

[0078] As shown in Figures 4-6 Taking the green sub-pixel structure P2, the blue sub-pixel structure P1 and the red sub-pixel structure P3 as an example, the cell thickness of the red sub-pixel structure P3 is 6μm, the cell thickness of the green sub-pixel structure P2 is 5μm, and the cell thickness of the blue sub-pixel structure P1 is 4μm.

[0079] The filling thickness of the optical material 207 refers to the size of the filled optical material 207 layer in the thickness direction Z of the first substrate 201.

[0080] In this way, according to the display requirements, the cholesteric liquid crystal can be driven to the P state by controlling the vertical electric field, thereby reflecting the visible light of the corresponding color, or the visible light can be transmitted through the optical material 207 by driving the cholesteric liquid crystal to the FC state, i.e. allowing the light to be transmitted.

[0081] The optical material 207 in different sub-pixel structures P in the same pixel area PA is configured to reflect light of different colors. For example, as shown in Figures 4-5BAs shown, one pixel region PA includes three sub-pixel structures P, the cholesteric liquid crystal in the three sub-pixel structures P reflects red light, green light and blue light respectively, thereby, when displaying, if the three sub-pixel structures P are all driven to be in the P state, the three sub-pixel structures P can be displayed as red, green and blue respectively, in this way, the pixel region PA is displayed as white; if the three sub-pixel structures P are all driven to be in the FC state, the three sub-pixel structures P allow light to pass through, and the display color can be the color on the side of the second substrate; if one or two of the three sub-pixel structures P are driven to be in the P state, the display color of the pixel region PA is the mixture of the colors of the sub-pixel structures P in the P state; in this way, the pixel region PA can display at least 8 colors, such as black, white, red, green, blue, cyan, yellow and purple.

[0082] As shown in Figures 4-5B , the display panel can further include a first structure 100, which can be located on the side of the pixel region PA close to the display surface of the display panel, the display surface refers to the side of the display panel where the display picture is displayed, and the first structure 100 can be used to adjust the brightness of the reflected light of the optical material 207 in the pixel region PA.

[0083] Exemplarily, the first structure 100 can be located on the light exit path of the reflected light reflected by the sub-pixel structure P, as shown in Figure 6 , the dashed arrow in the figure indicates the light exit path of the sub-pixel structure P, and the first structure 100 can be configured to block part of the reflected light from exiting the display panel, or allow all the reflected light to exit the display panel, thereby adjusting the luminous flux of the reflected light and adjusting the brightness of the pixel region PA, and when the brightness of the pixel region PA is adjusted, the gray scale adjustment of the display color of the pixel region PA is realized.

[0084] Among them, the first structure 100 can be set at least with the granularity of the pixel region PA, for example, including N*M pixel regions PA, at least N*M first structures 100 can be included, and different first structures 100 correspond to different pixel regions PA, thereby realizing display gray scale adjustment with the granularity of the pixel region PA.

[0085] In an example, the first structure 100 can realize the adjustment of 256 gray scales, so that in the case of including the first structure 100, on the basis of realizing the display of eight colors such as black, white, red, green, blue, cyan, yellow and purple in the pixel region PA, each display color can have 256 gray scales.

[0086] As shown in Figures 4-6 , the display panel can further include a second structure located on the second electrode pattern 204 or the first electrode pattern 202, which can be used to adjust the electric field size of different regions in the sub-pixel structure P.

[0087] Taking the first electrode pattern 202 as the common electrode and the second electrode pattern 204 as the control electrode as an example, the second structure can be arranged on the first electrode pattern 202 or the second electrode pattern 204, and the adjustment of the electric field size of different regions in the sub-pixel structure P can be achieved.

[0088] The different regions in the sub-pixel structure P can refer to different regions in the planar direction of the display panel. When the second structure is arranged on the second electrode pattern 204, the second structure can adjust the electric field size of different regions in the second electrode pattern 204. When the second structure is arranged on the first electrode pattern 202, the first structure 100 can adjust the electric field size of different regions in the first electrode pattern 202.

[0089] The second structure can independently control the electric field of different regions in the electrode pattern (the first electrode pattern 202 and the second electrode pattern 204) where the second structure is arranged. For example, the second structure can divide the electrode pattern into multiple sub-regions that are insulated from each other, and the multiple sub-regions are connected to independent second signal lines DL (hereinafter referred to as control lines), so that the voltage of the multiple sub-regions is independently controlled.

[0090] The electric field of different regions in the first electrode pattern 202 or the second electrode pattern 204 can be independently controlled. By adjusting the electric field size of different regions, multiple vertical electric fields can be formed between the first substrate and the second substrate. Different sizes of vertical electric fields are located in different planar regions. In this way, the reflectivity of the optical material 207 in different regions of the sub-pixel structure P can be different. Thus, the light quantity of reflected light in different regions inside the sub-pixel structure P is different, so that a gradient of reflected light brightness is formed in the sub-pixel structure P, thereby adjusting the display brightness of the sub-pixel structure P, and achieving gray scale adjustment.

[0091] In this embodiment, the second structure can be used to control the electric field of different regions in the first electrode pattern 202 or the second electrode pattern 204, so as to adjust the brightness of the reflected light inside the sub-pixel structure P, change the brightness, and change the gray scale. Thus, the sub-pixel structure P can realize a corresponding display color with multiple gray scales. The number of gray scales realized can be determined according to the number of sub-regions. The more sub-regions, the more types of gray scales realized.

[0092] For example, taking the green sub-pixel structure P2 as an example, the sub-pixel structure P realizes green. Through the second structure, the optical material 207 in some regions of the green sub-pixel structure P2 can be in the P state, and the optical material 207 in some regions can be in the FC state. Thus, the green sub-pixel structure P2 is alternately bright and dark, and the display gray scale of green can be adjusted as a whole.

[0093] In some embodiments of the display panel, both the first structure 100 and the second structure can be included. In this way, the brightness of the reflected light can be adjusted not only from inside the sub-pixel structure P, but also in the light-out path of the pixel area PA, so that the display panel has more display gray scales.

[0094] In some embodiments, as shown in FIG. 3, the display panel can further include a third structure 300, which can be located on the side of the pixel area PA away from the display surface. The third structure 300 can be formed of a black light-absorbing material and can be used to absorb visible light that passes through the sub-pixel structure P, thereby realizing black display of the pixel area PA. Figure 4

[0095] As shown in FIG. 4, the third structure 300 can be located on the side of the bottom sub-pixel structure P away from the display surface. Figures 5A-6 Figures 4-6 As shown in FIG. 5, the third structure 300 can be located on the side of the second substrate of the sub-pixel structure P away from the first substrate. The third structure 300 can cover the entire first substrate (or the second substrate), i.e., the third structure 300 can cover the plurality of pixel areas PA.

[0096] As shown in FIG. 6, in some embodiments, the pixel areas PA can be separated from each other by a partition structure, which can be formed of a non-transparent material. In this way, color crosstalk between the pixel areas PA can be avoided. Specifically, as shown in FIG. 7, the partition structure can include a first partition structure 103 located in the first structure 100, which is formed of a non-transparent material. In addition, the partition structure can include a second partition structure 203 located in the sub-pixel structure P, which is formed of a non-transparent material. The first partition structure 103 and the plurality of second partition structures 203 can have coinciding orthographic projections on the display surface. Figure 4 Figures 5A-5B Figure 6 As shown in FIG. 8, the partition structure can include the second partition structure 203.

[0097] As shown in FIG. 9, in some embodiments, the plurality of sub-pixel structures P in one pixel area PA can be arranged in the normal direction of the display surface. As shown in FIG. 10, the plurality of sub-pixel structures P in one pixel area PA can be arranged in the plane direction of the display surface. Figure 4

[0098] As shown in FIG. 11, in some embodiments, the plurality of sub-pixel structures P in one pixel area PA can be arranged in the normal direction of the display surface. As shown in FIG. 12, the plurality of sub-pixel structures P in one pixel area PA can be arranged in the plane direction of the display surface. Figures 5A-6 Figure 4

[0099] The normal direction of the display surface can refer to the thickness direction Z of the first substrate 201, and the plane direction of the display surface can refer to the plane direction of the first substrate 201.

[0100] As​​​​​​​Figure 4 As shown in the display panel, in the case that the plurality of sub-pixel structures P can be arranged in the normal direction of the display surface in the pixel area PA, the plurality of sub-pixel structures P can be stacked in the normal direction of the display surface. Taking an example that the pixel area PA includes three kinds of sub-pixel structures P, the three kinds of sub-pixel structures P are green sub-pixel structure P2, red sub-pixel structure P3 and blue sub-pixel structure P1 respectively, in the normal direction of the display surface, the red sub-pixel structure P3 is located at the bottom layer, the green sub-pixel structure P2 can be located at the side of the red sub-pixel structure P3 close to the display surface, and the blue sub-pixel structure P1 can be located at the side of the green sub-pixel structure P2 close to the display surface.

[0101] In this example, each sub-pixel structure P includes a first substrate, a second substrate and an optical material 207 located between the first substrate and the second substrate.

[0102] When the display panel as shown is used, the control of the display color is as follows: Figure 1 When the display panel as shown is used, the control of the display color is as follows:

[0103] For example, if the pixel area PA needs to display black, the cholesteric liquid crystals in the green sub-pixel structure P2, the red sub-pixel structure P3 and the blue sub-pixel structure P1 are all driven to the FC state, so that the three kinds of cholesteric liquid crystals all realize transmission display and do not reflect the corresponding color, the external light can pass through the three layers of sub-pixel structures P, and then reach the third structure 300 at the lowermost layer, and then be absorbed by the third structure 300, thereby displaying black.

[0104] For example, if the pixel area PA needs to display white, the cholesteric liquid crystals in the green sub-pixel structure P2, the red sub-pixel structure P3 and the blue sub-pixel structure P1 are all driven to the P state, so that the three kinds of cholesteric liquid crystals all realize reflection display, and the combination of blue, green and red displays white.

[0105] For example, if the pixel area PA needs to display red, the cholesteric liquid crystals in the blue sub-pixel structure P1 and the green sub-pixel structure P2 are all driven to the FC state, and the cholesteric liquid crystal in the red sub-pixel structure P3 is driven to the P state, so that the blue and green sub-pixel structures P2 do not display color in transmission, and the red liquid crystal reflects red natural light to display red.

[0106] For example, if the pixel area PA needs to display green, the cholesteric liquid crystals in the blue sub-pixel structure P1 and the red sub-pixel structure P3 are all driven to the FC state, and the cholesteric liquid crystal in the green sub-pixel structure P2 is driven to the P state, so that the blue and red sub-pixel structures P3 do not display color in transmission, and the green liquid crystal reflects green natural light to display green.

[0107] For example, if the pixel region PA needs to display blue color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the red sub-pixel structure P3 is driven to the FC state, and the cholesteric liquid crystal in the blue sub-pixel structure P1 is driven to the P state, so that the green sub-pixel structure P2 and the red sub-pixel structure P3 do not display color in transmission, and the blue sub-pixel structure P1 displays blue color in reflection.

[0108] For example, if the pixel region PA needs to display cyan color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the blue sub-pixel structure P1 is driven to the P state, and the cholesteric liquid crystal in the red sub-pixel structure P3 is driven to the FC state, so that the red sub-pixel structure P3 does not display color in transmission, and the cholesteric liquid crystal in the green and blue sub-pixel structures P1 reflects corresponding natural light to display cyan color.

[0109] For example, if the pixel region PA needs to display yellow color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the red sub-pixel structure P3 is driven to the P state, and the cholesteric liquid crystal in the blue sub-pixel structure P1 is driven to the FC state, so that the blue sub-pixel structure P1 does not display color in transmission, and the green and red sub-pixel structures P3 reflect corresponding natural light to display yellow color.

[0110] For example, if the pixel region PA needs to display purple color, the cholesteric liquid crystal in the blue sub-pixel structure P1 and the red sub-pixel structure P3 is driven to the P state, and the cholesteric liquid crystal in the green sub-pixel structure P2 is driven to the FC state, so that the green sub-pixel structure P2 does not display color in transmission, and the blue and red sub-pixel structures P3 reflect corresponding natural light to display purple color.

[0111] In this way, black, white, red, green, blue, cyan, yellow and purple color display can be realized.

[0112] In a further example of the embodiment, since the plurality of sub-pixel structures P in the pixel region PA need to be stacked in the thickness direction Z of the display panel, the plurality of sub-pixel structures P need to ensure alignment accuracy. In this example, the overlapping area between the projections of the first electrode pattern 202 and the second electrode pattern 204 in the sub-pixel structure P on the second substrate is a second overlapping area 22.

[0113] The spacing between the outer contours of the second overlapping areas 22 in the plurality of sub-pixel structures P in one pixel region PA is less than 5 μm.

[0114] In this example, taking pixel region PA as including green sub-pixel structure P2, red sub-pixel structure P3, and blue sub-pixel structure P1, the outer contour of the second overlapping region 22 of green sub-pixel structure P2 overlaps with the outer contour of the second overlapping region 22 of red sub-pixel structure P3, and the distance between the outer contours is less than 5μm; the outer contour of the second overlapping region 22 of green sub-pixel structure P2 overlaps with the outer contour of the second overlapping region 22 of blue sub-pixel structure P1, and the distance between the outer contours is less than 5μm; the outer contour of the second overlapping region 22 of red sub-pixel structure P3 overlaps with the outer contour of the second overlapping region 22 of blue sub-pixel structure P1, and the distance between the outer contours is less than 5μm;

[0115] This ensures that the bonding accuracy of the multi-layer sub-pixel structure P is ≤5μm. For example, the bonding accuracy can be 5μm, 4μm, 3μm, 2μm, or 1μm.

[0116] In one example, the outer contours of the second overlapping regions 22 in the multi-layer sub-pixel structure P can coincide. For example, the outer contours of the second overlapping regions 22 of the green sub-pixel structure P2 coincide with the outer contours of the second overlapping regions 22 of the red sub-pixel structure P3, the outer contours of the second overlapping regions 22 of the green sub-pixel structure P2 coincide with the outer contours of the second overlapping regions 22 of the blue sub-pixel structure P1, and the outer contours of the second overlapping regions 22 of the red sub-pixel structure P3 coincide with the outer contours of the second overlapping regions 22 of the blue sub-pixel structure P1.

[0117] When the outer contours overlap, it can be ensured that when pixel area PA displays a certain color, the colors reflected by various sub-pixel structures P will not crosstalk the color that pixel area PA needs to display, thus guaranteeing the color quality of the displayed color. For example, suppose pixel area PA needs to display yellow, the blue sub-pixel does not display color, and the green and red sub-pixel structures P3 reflect the corresponding natural light. If the green and red sub-pixel structures P3 are not aligned, the proportion of green or red light can be too high, thus causing crosstalk to yellow.

[0118] In this embodiment, the optical materials injected into different sub-pixel structures P can be obtained by preparing cholesteric liquid crystals with the same central reflection wavelength using chiral agents with different helical torsion constants and the same parent liquid crystal.

[0119] like Figures 5A-6 As shown, in a further example of this embodiment, since multiple sub-pixel structures P in a pixel region PA are stacked in the thickness direction Z of the substrate (first substrate 201 or second substrate 206), each pixel region PA can correspond to a first structure 100. For example, if there are N*M pixel regions PA, then there are N*M first structures 100, and different pixel regions PA correspond to different first structures 100.

[0120] As shown in Figures 5A-6 , a plurality of sub-pixel structures P are arranged in the plane direction of the display surface, so that the pixel area PA includes three kinds of sub-pixel structures P, and the three kinds of sub-pixel structures P are respectively green sub-pixel structure P2, red sub-pixel structure P3 and blue sub-pixel structure P1. For example, in the plane direction of the display surface, the red sub-pixel structure P3, the green sub-pixel structure P2 and the red sub-pixel structure P3 are arranged adjacent to each other.

[0121] In this example, each sub-pixel structure P includes a first substrate, a second substrate and an optical material 207 located between the first substrate and the second substrate.

[0122] Among them, a plurality of sub-pixel structures P can share a first substrate and a second substrate, and a plurality of first electrode patterns 202 are included on the first substrate, and a plurality of second electrode patterns 204 are included on the second substrate.

[0123] When the display panel shown in Figure 2 is used, the display color control process is as follows:

[0124] For example, if the pixel area PA needs to display black, the cholesteric liquid crystals in the green sub-pixel structure P2, the red sub-pixel structure P3 and the blue sub-pixel structure P1 can all be driven to the FC state, so that the three kinds of cholesteric liquid crystals all realize transmission display and do not reflect the corresponding color. External light can pass through each sub-pixel structure P and then reach the third structure 300 at the lowermost layer, and then be absorbed by the third structure 300, thereby displaying black.

[0125] For example, if the pixel area PA needs to display white, the cholesteric liquid crystals in the green sub-pixel structure P2, the red sub-pixel structure P3 and the blue sub-pixel structure P1 can all be driven to the P state, so that the three kinds of cholesteric liquid crystals all realize reflection display, and the combination of blue, green and red displays white.

[0126] For example, if the pixel area PA needs to display red, the cholesteric liquid crystals in the blue sub-pixel structure P1 and the green sub-pixel structure P2 are driven to the FC state, and the cholesteric liquid crystal in the red sub-pixel structure P3 is driven to the P state. In this way, the transmitted light of the blue and green sub-pixel structures P2 is absorbed by the black background color, and the red liquid crystal reflects the red natural light to display red.

[0127] For example, if the pixel area PA needs to display green, the cholesteric liquid crystals in the blue sub-pixel structure P1 and the red sub-pixel structure P3 are driven to the FC state, and the cholesteric liquid crystal in the green sub-pixel structure P2 is driven to the P state. In this way, the transmitted light of the blue and red sub-pixel structures P3 is absorbed by the black background color, and the green liquid crystal reflects the green natural light to display green.

[0128] For example, if the pixel region PA is required to display blue color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the red sub-pixel structure P3 is driven to FC state, and the cholesteric liquid crystal in the blue sub-pixel structure P1 is driven to P state, so that the green sub-pixel structure P2 and the red sub-pixel structure P3 transmit light which is absorbed by the black background, and the blue sub-pixel structure P1 reflects blue natural light to display blue color.

[0129] For example, if the pixel region PA is required to display cyan color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the blue sub-pixel structure P1 is driven to P state, and the cholesteric liquid crystal in the red sub-pixel structure P3 is driven to FC state, so that the red sub-pixel structure P3 transmits light which is absorbed by the black background, and the cholesteric liquid crystal in the green and blue sub-pixel structures P1 reflects corresponding natural light to display cyan color.

[0130] For example, if the pixel region PA is required to display yellow color, the cholesteric liquid crystal in the green sub-pixel structure P2 and the red sub-pixel structure P3 is driven to P state, and the cholesteric liquid crystal in the blue sub-pixel structure P1 is driven to FC state, so that the blue sub-pixel structure P1 transmits light which is absorbed by the black background, and the green and red sub-pixel structures P3 reflect corresponding natural light to display yellow color.

[0131] For example, if the pixel region PA is required to display purple color, the cholesteric liquid crystal in the blue sub-pixel structure P1 and the red sub-pixel structure P3 is driven to P state, and the cholesteric liquid crystal in the green sub-pixel structure P2 is driven to FC state, so that the green sub-pixel structure P2 transmits light which is absorbed by the black background, and the blue and red sub-pixel structures P3 reflect corresponding natural light to display purple color.

[0132] In this way, black, white, red, green, blue, cyan, yellow and purple color display can be realized.

[0133] In further examples of this embodiment, as shown in Figure 5A and Figure 5B Since the plurality of sub-pixel structures P in the pixel region PA are arranged in the plane direction of the display panel, each sub-pixel structure P can correspond to one first structure 100, so that the first structure 100 can adjust the gray scale of the display color of each sub-pixel structure P. As shown in Figures 5A-6 each pixel region PA can correspond to one first structure 100, so that the first structure 100 can adjust the gray scale of the display color of the plurality of sub-pixel structures P. In this case, the first overlapping region can cover the second overlapping regions of the plurality of sub-pixel structures P in one pixel region.

[0134] In further examples of this embodiment, as shown in Figures 5A-6As shown, a partition wall 400 can be set between multiple sub-pixel structures P. The overlapping area between the orthographic projections of the first electrode pattern 202 and the second electrode pattern 204 on the third substrate is the second overlapping area 22. The orthographic projection of the partition wall 400 on the first substrate encloses the second overlapping area 22.

[0135] In this embodiment, the isolation wall 400 can block crosstalk between the colored light reflected from adjacent sub-pixel structures P. The isolation wall 400 can be formed using an opaque material.

[0136] like Figure 12 As shown, the cross-section of the isolation wall 400 in the normal direction of the display surface can be trapezoidal. Specifically, assuming the side of the first substrate facing away from the second substrate is the display surface, the area of ​​the surface of the isolation wall 400 near the first substrate can be larger than the area of ​​the surface near the second substrate, thus making the cross-section of the isolation wall 400 in the normal direction of the display surface an inverted trapezoid. This reduces the reflection of light reflected by the optical material 207 by the isolation wall 400, thereby reducing the impact of the isolation wall 400 on the display color.

[0137] It should be noted that the area enclosed by the isolation wall 400 between the first substrate and the second substrate can be a sealed area. By injecting optical material 207 into this sealed area, crosstalk between optical materials 207 that reflect different colors of light can be avoided, thereby optimizing the display quality.

[0138] In a further example of this embodiment, the optical material 207, such as cholesteric liquid crystal, in the plurality of sub-pixel structures P can be obtained by irradiation with UV light. Thus, by irradiating different positions of the display panel with different UV light energies, the cholesteric liquid crystals in the plurality of sub-pixel structures P can display red, green, and blue colors respectively.

[0139] Please combine Figure 4 As shown in Figure 12, the test cell results show that the cholesteric liquid crystal in the sub-pixel structure P initially reflects blue light. Under 313nm UV light irradiation, irradiation with 5J of energy can transform it into green cholesteric liquid crystal, irradiation with 10J of energy can transform it into yellow cholesteric liquid crystal, and irradiation with 15J of energy can transform it into red cholesteric liquid crystal. It can be seen that by irradiating UV light of different energies, the cholesteric liquid crystal can reflect different colors of light.

[0140] In this example, the injected optical material can be a UV-sensitive cholesteric liquid crystal, and the pitch of the cholesteric liquid crystal can be changed by UV light irradiation, thereby achieving the reflection of the corresponding color.

[0141] The first structure 100 and the second structure will be described by example below.

[0142] likeFigure 5A and Figure 4 As shown in FIG. 1A and FIG. 1B, in some embodiments, the first structure 100 can include a third substrate, a fourth substrate, and a liquid crystal layer 107 located between the third substrate and the fourth substrate.

[0143] The third substrate is located at a side of the pixel area PA close to the display surface, and includes a third electrode pattern 104.

[0144] The fourth substrate includes a fourth electrode pattern 102, and a normal projection of the third electrode pattern 104 and the fourth electrode pattern 102 on the third substrate at least partially overlaps, and has a first overlapping area 11.

[0145] The liquid crystal layer 107 is located between the third substrate and the fourth substrate, and a deflection angle of liquid crystal in the liquid crystal layer 107 is controlled by an electric field between the third electrode pattern 104 and the fourth electrode pattern 102.

[0146] The first overlapping area 11 covers a second overlapping area 22 of a normal projection of the first electrode pattern 202 and the second electrode pattern 204 on the third substrate.

[0147] As shown in FIG. 1A and FIG. 1B, in some embodiments, the first structure 100 can include a third substrate, a fourth substrate, and a liquid crystal layer 107 located between the third substrate and the fourth substrate. Figure 5A and Figure 4 As shown in FIG. 1A and FIG. 1B, in some embodiments, the first structure 100 can include a third substrate, a fourth substrate, and a liquid crystal layer 107 located between the third substrate and the fourth substrate.

[0148] The third substrate can include a third substrate 106, the third electrode pattern 104 located at a side of the third substrate 106 close to the liquid crystal layer 107, and a first alignment layer (not shown in the figure) located at a side of the third electrode pattern 104 away from the third substrate 106. The fourth substrate can include a fourth substrate 101, the fourth electrode pattern 102 located at a side of the fourth substrate 101 close to the liquid crystal layer 107, and a second alignment layer (not shown in the figure) located at a side of the fourth electrode pattern 102 away from the fourth substrate 101.

[0149] The first alignment layer and the second alignment layer are used for pre-alignment of the liquid crystal in the liquid crystal layer 107, so that the liquid crystal in the liquid crystal layer 107 has a consistent initial orientation direction.

[0150] The third substrate 106, the fourth substrate 101, the third electrode pattern 104, and the fourth electrode pattern 102 can be transparent, i.e., the third substrate 106, the fourth substrate 101, the third electrode pattern 104, and the fourth electrode pattern 102 have light transmission.

[0151] The third substrate 106 and the fourth substrate 101 can be glass substrates.

[0152] The third electrode pattern 104 and the fourth electrode pattern 102 can be formed of a conductive material, for example, a metal material or a metal oxide material, and in the case of a metal oxide material, indium tin oxide (ITO) can be selected.

[0153] The third electrode pattern 104 and the fourth electrode pattern 102 can have any pattern shape, for example, a regular polygon such as a rectangle, a square, an octagon, a pentagon, or a non-polygon such as a circle or an ellipse.

[0154] As shown in FIG. 5, the third electrode pattern 104 and the fourth electrode pattern 102 can be arranged on the third substrate 106 and the fourth substrate 101, respectively. Figure 4 The third electrode pattern 104 and the fourth electrode pattern 102 can be arranged on the third substrate 106 and the fourth substrate 101, respectively.

[0155] The plurality of first structures 100 can be independent of each other, that is, independently driven.

[0156] The third substrate further includes a third signal line (not shown in the figure) connected to the third electrode pattern 104, and the fourth substrate further includes a fourth signal line (not shown in the figure) connected to the fourth electrode pattern 102. The third signal line and the third electrode pattern 104 can be arranged in the same layer or different layers, and the fourth signal line and the fourth electrode pattern 102 can be arranged in the same layer or different layers.

[0157] The third substrate further includes a third signal line (not shown in the figure) connected to the third electrode pattern 104, and the fourth substrate further includes a fourth signal line (not shown in the figure) connected to the fourth electrode pattern 102. The third signal line and the third electrode pattern 104 can be arranged in the same layer or different layers, and the fourth signal line and the fourth electrode pattern 102 can be arranged in the same layer or different layers. Figure 7 The third substrate further includes a third signal line (not shown in the figure) connected to the third electrode pattern 104, and the fourth substrate further includes a fourth signal line (not shown in the figure) connected to the fourth electrode pattern 102. The third signal line and the third electrode pattern 104 can be arranged in the same layer or different layers, and the fourth signal line and the fourth electrode pattern 102 can be arranged in the same layer or different layers.

[0158] The third electrode pattern 104 can cover the third substrate in the whole surface, i.e. cover the plurality of pixel areas PA in the whole surface. In this case, the plurality of fourth electrode patterns 102 are connected to a plurality of fourth signal lines which are independent from each other, and the plurality of fourth signal lines are connected to different pins of the fourth chip. In this case, the fourth substrate can further include a plurality of first driving circuits corresponding to the plurality of fourth electrode patterns 102 respectively. The first driving circuit can include a first thin film transistor. The source of the first thin film transistor can be connected to the fourth signal line, the drain can be connected to the fourth electrode pattern 102, and the gate can be connected to a gate line on the fourth substrate. The fourth signal line inputs a control signal, and the gate line inputs a scanning signal. The scanning signal controls the first thin film transistor to be in the off state or the on state.

[0159] When the first thin film transistor is in the on state, the voltage signal output by the fourth signal line can be loaded to the fourth electrode pattern 102. When the first thin film transistor is in the off state, the voltage signal output by the fourth signal line cannot be loaded to the fourth electrode pattern 102.

[0160] The driving circuit can be a 1T1C driving circuit or a 3T1C driving circuit.

[0161] As shown in Figure 7 , Figure 4 It is shown that Figure 7 The planar view of the pixel area PA is shown in Figures 5A-6 The overlapping area between the normal projection of the third electrode pattern 104 and the fourth electrode pattern 102 on the third substrate is the first overlapping area 11, and the overlapping area between the normal projection of the first electrode pattern 202 and the second electrode pattern 204 on the third substrate is the second overlapping area 22.

[0162] The first overlapping area 11 covers the second overlapping area 22, so that the liquid crystal layer 107 in the space where the first overlapping area 11 is located can adjust the brightness of all the light reflected by the optical material 207 in the sub-pixel structure P, thereby improving the accuracy of gray scale adjustment.

[0163] The liquid crystal layer 107 can be formed by liquid crystal filled between the third substrate and the fourth substrate. The liquid crystal molecules can be deflected under the action of the electric field formed between the third electrode pattern 104 and the fourth electrode pattern 102. The electric field has different sizes and different deflection angles. When the liquid crystal is deflected, part or all of the reflected light can pass through, thereby adjusting the brightness of the pixel area PA.

[0164] As shown in Figures 8-10As shown, the second structure can include a plurality of sub-electrodes, the plurality of sub-electrodes are located on the side of the second substrate and are arranged at intervals in the planar direction of the second substrate to form a second electrode pattern 204, and the plurality of sub-electrodes are insulated from each other; and further include a plurality of thin film transistors, respectively connected with the plurality of sub-electrodes, and the plurality of thin film transistors are independent and insulated from each other.

[0165] In this embodiment, the thin film transistor on the second substrate is referred to as a second thin film transistor 208, and the second substrate can include a second driving circuit, and the second thin film transistor 208 is located in the second driving circuit, and the second driving circuit can be a 1T1C driving circuit or a 3T1C driving circuit.

[0166] As shown in FIG. 1, Figures 8-10 As shown in FIG. 1, Figures 8-10 The planar schematic diagrams of the three second structures are shown respectively, as shown in FIG. 2, Figures 8-10 As shown in FIG. 2, each sub-electrode corresponds to an independent second driving circuit, so that the sub-electrode can be driven by the independent second driving circuit.

[0167] As shown in FIG. 3, Figures 8-10 As shown in FIG. 3, the gate of the second thin film transistor 208 can be connected with a second gate line GL, the source of the second thin film transistor 208 can be connected with a second signal line DL, and the drain of the second thin film transistor 208 can be connected with a sub-electrode.

[0168] In some embodiments, the second thin film transistors 208 connected with the plurality of sub-electrodes in one sub-pixel can be connected with the same second gate line GL.

[0169] As shown in FIG. 4, Figure 8 As shown in FIG. 4, the second structure includes a plurality of sub-electrodes, and the plurality of sub-electrodes are spaced apart from each other and insulated from each other. Among them, the plurality of sub-electrodes constitute the second electrode pattern 204, that is, the second electrode pattern 204 is divided into a plurality of sub-regions spaced apart from each other, and each sub-region is a sub-electrode.

[0170] The thickness and material of the plurality of sub-electrodes can be the same, so that the plurality of sub-electrodes can be formed in the same patterning process.

[0171] As shown in FIG. 5, Figure 9 and Figure 10 As shown in FIG. 5, the shapes of the plurality of sub-electrodes can be the same, as shown in FIG. 6, Figure 12 As shown in FIG. 6, the shapes of the plurality of sub-electrodes can be different.

[0172] In a further design of the example, the orthographic projection of the plurality of sub-electrodes on the second substrate can be arranged in a regular pattern, for example, the plurality of sub-electrodes can be understood as being obtained by dividing a regular polygon, and the shape of each region obtained by the division can be different or the same, and the shapes of the plurality of sub-electrodes can be the same or different.

[0173] With the design of this embodiment, in the case that the plurality of sub-pixel structures P in the pixel area PA are arranged in a planar direction and the plurality of sub-pixel structures P are arranged in a row and column array, the regular pattern of the second electrode pattern 204 makes the arrangement of the sub-pixel structures P also regular, which can reduce the difficulty of UV irradiation of the cholesteric liquid crystal at different positions. For example, as shown in FIG. 5, when UV light irradiation is performed, the sub-pixel structures P2 in the second column and the sub-pixel structures P3 in the third column that do not need UV light irradiation can be shielded by the shielding plate 500, and only the sub-pixel structures P1 in the first column can be irradiated. After the first column is irradiated, the sub-pixel structures P1 in the first column and the sub-pixel structures P3 in the third column can be shielded by the shielding plate 500, and the sub-pixel structures P2 in the second column can be irradiated. In this way, the control accuracy of the reflective color of the cholesteric liquid crystal in each sub-pixel structure P can be increased. Figure 8

[0174] In further examples of the present embodiment, the areas of the plurality of sub-electrodes can be the same or different, as shown in FIG. 6, the areas of the plurality of sub-electrodes can be the same, as shown in FIG. 7, and the areas of the plurality of sub-electrodes can be different, as shown in FIG. 8. Figure 9 Figure 10 Figure 8 In the above examples, the total area of the orthographic projection of the second electrode pattern 204 on the first substrate 201 in the plurality of sub-pixel structures P is the same, which can improve the uniformity between the sub-pixel structures P. In addition, the total area of the orthographic projection of the plurality of second electrode patterns 204 on the first substrate 201 is the same, which can enhance the regularity of the arrangement of the plurality of sub-pixel structures P in the case that the plurality of sub-pixel structures P in the pixel area PA are arranged in a planar direction. In this case, the plurality of sub-pixel structures P can be regularly arranged in a row and column array, thereby also reducing the difficulty of UV irradiation of the cholesteric liquid crystal at different positions.

[0175] In some examples, the orthographic projection of the plurality of sub-electrodes on the second substrate can be arranged in a regular pattern, and the areas of the plurality of second electrode patterns 204 are also the same.

[0176] As shown in FIG. 9, the shapes of the plurality of sub-electrodes can be the same, and the areas of the orthographic projection of the plurality of sub-electrodes on the second substrate can be the same. In this example, the design of the second electrode pattern 204 can be simplified, and the difficulty of patterning the mask plate can be reduced. Figure 9 As shown in FIG. 10, the shapes of the plurality of sub-electrodes can be different, and the areas of the orthographic projection of the plurality of sub-electrodes on the second substrate can be the same. In this example, the design of the second electrode pattern 204 can be simplified, and the difficulty of patterning the mask plate can be reduced.

[0177] Figure 10 ​​​​As shown, the shapes of the plurality of sub-electrodes can be the same, but the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate are not completely the same. Exemplarily, the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate can be mutually different, that is, the areas of the orthographic projection of any two sub-electrodes on the second substrate are not the same. In such an example, by driving the optical material 207 at different sub-electrodes to reflect light, that is, the gray scale adjustment can be achieved, the difficulty of gray scale control can be reduced, for example, different area sub-electrodes can be combined accordingly, that is, the gray scale can be controlled.

[0178] As shown, the shapes of the plurality of sub-electrodes can be the same, but the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate are not completely the same. Exemplarily, the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate can be mutually different, that is, the areas of the orthographic projection of any two sub-electrodes on the second substrate are not the same. In such an example, by driving the optical material 207 at different sub-electrodes to reflect light, that is, the gray scale adjustment can be achieved, the difficulty of gray scale control can be reduced, for example, different area sub-electrodes can be combined accordingly, that is, the gray scale can be controlled. Figure 10 As shown, the shapes of the plurality of sub-electrodes can be different, and the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate are not completely the same. Exemplarily, the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate can be mutually different, that is, the shapes and areas of the orthographic projection of any two sub-electrodes on the second substrate are not the same. In such an example, since the shapes and areas of the sub-electrodes are different, by driving the optical material 207 at different sub-electrodes to reflect light, that is, more accurate and flexible gray scale adjustment can be achieved, for example, sub-electrodes of different shapes and different areas can be combined, that is, more diverse gray scale changes can be achieved.

[0179] In some embodiments, in the case where the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate are mutually different, the areas of the plurality of sub-electrodes in the orthographic projection on the second substrate satisfy a linear variation relationship.

[0180] The linear variation relationship refers to that there is a first-order function relationship between the areas of the plurality of sub-electrodes (referring to the areas in the orthographic projection on the second substrate).

[0181] The area ratio of the plurality of sub-electrodes in the orthographic projection on the second substrate is represented by the area ratio of the sub-electrodes in the second electrode pattern 204, which is expressed by percentage.

[0182] In some examples, the area ratios of the plurality of sub-electrodes are linearly changed, for example, they can be in a sequence relationship. Exemplarily, including 4 sub-electrodes, the area ratios of the 4 sub-electrodes are respectively: 10%, 20%, 30%, 40%. Exemplarily, including 5 sub-electrodes, the area ratios of the 5 sub-electrodes are respectively: 10%, 15%, 20%, 25%, 30%.

[0183] In other examples, the area ratios of the plurality of sub-electrodes can also satisfy other types of linear relationships. For example, including 3 sub-electrodes, the area ratios of the 3 sub-electrodes can be respectively 10%, 30%, 60%; or the area ratios of the 3 sub-electrodes are: 15%, 35%, 50%.

[0184] When the area proportions of the plurality of sub-electrodes change linearly, different combinations of the three sub-electrodes can make the gray scale transition in the sub-pixel structure P smoother, and the picture effect better.

[0185] In further examples, in the case that the area proportions of the plurality of sub-electrodes are different, the area distribution manners of the sub-electrodes in different sub-pixel structures P in the pixel area PA can be different.

[0186] The area distribution manner refers to the distribution of the area proportions of the sub-electrodes. For example, the area proportions of the four sub-electrodes in one sub-pixel structure P are 10%, 20%, 30%, and 40% respectively, and the area proportions of the four sub-electrodes in another sub-pixel structure P are 15%, 20%, 25%, and 40% respectively.

[0187] In the different sub-pixel structures P, the number of sub-electrodes included can be the same.

[0188] In combination with Figure 10 As shown in FIG. 2, in some examples, the shapes and areas of the orthographic projections of the plurality of sub-electrodes on the second substrate are not completely the same. The plurality of sub-electrodes can include a first sub-electrode 241, a second sub-electrode 242, and a third sub-electrode 243. The area of the orthographic projection of the first sub-electrode 241 on the second substrate is smaller than the area of the orthographic projection of the third sub-electrode 243 on the second substrate, and the area of the orthographic projection of the third sub-electrode 243 on the second substrate is smaller than the area of the orthographic projection of the second sub-electrode 242 on the second substrate.

[0189] In the example, the area of the first sub-electrode 241 is the smallest, the area of the second sub-electrode 242 is the largest, and the area of the third sub-electrode 243 is between the area of the first sub-electrode 241 and the area of the second sub-electrode 242.

[0190] In the example, the area of the first sub-electrode 241 is the smallest, the area of the second sub-electrode 242 is the largest, and the area of the third sub-electrode 243 is between the area of the first sub-electrode 241 and the area of the second sub-electrode 242.

[0191] In the example, the area of the first sub-electrode 241 is the smallest, the area of the second sub-electrode 242 is the largest, and the area of the third sub-electrode 243 is between the area of the first sub-electrode 241 and the area of the second sub-electrode 242.

[0192] Specifically, as Figure 11As shown, the second sub-electrode 242 includes a first region 2421, and a second region 2422 and a third region 2423 located on opposite sides of the first region 2421 respectively, the shape of the orthographic projection of the first region 2421 on the second substrate is the same as that of the first sub-electrode 241, and the area of the orthographic projection of the first region 2421 on the second substrate is greater than that of the first sub-electrode 241 and the third sub-electrode 243.

[0193] The shape of the orthographic projection of the second region 2422 and the third region 2423 on the second substrate is the same as that of the first sub-electrode 241, and the area of the orthographic projection of the second region 2422 on the second substrate is greater than that of the third region 2423.

[0194] The orthographic projection of the first sub-electrode 241, the second sub-electrode 242, the first region 2421, the second region 2422 and the third region 2423 on the second substrate are all rectangular.

[0195] The first sub-electrode 241 is located between the first region 2421 and the second region 2422, and the third sub-electrode 243 is located between the first region 2421 and the third region 2423; thus, the orthographic projection of the second sub-electrode 242 on the second substrate generally presents a T-shaped appearance, and the first sub-electrode 241, the second sub-electrode 242 and the third sub-electrode 243 are arranged in a regular rectangle, which can be understood as the position arrangement of the first sub-electrode 241, the second sub-electrode 242 and the third sub-electrode 243 on the second substrate, so that they are spliced into a regular rectangle.

[0196] The second structure of this embodiment can divide the second electrode pattern 204 into three regions, that is, one sub-pixel structure P can be divided into three sub-regions, and different combinations of the three sub-regions can realize 8 gray scale display, thereby realizing multi-gray scale color display of a single sub-pixel.

[0197] In practice, the second structure can include a larger number of sub-electrodes, and the more the number of sub-electrodes, the more the types of gray scale, and the more types of multi-gray scale color display can be realized.

[0198] In a further example, as shown in Figure 11 as shown, Figure 11 The area ratio settings of the sub-electrodes in different sub-pixel structures P in the pixel area PA are shown, for example, as shown in Figure 11 Taking the multiple sub-pixel structures P in the pixel area PA as an example, which include a blue sub-pixel structure P1, a red sub-pixel structure P3 and a green sub-pixel structure P2.

[0199] Figures 1-12 In the above example, B represents the blue sub-pixel structure P1, G represents the green sub-pixel structure P2, and R represents the red sub-pixel structure P3.

[0200] The area ratio corresponding to the first sub-electrode 241 in the red sub-pixel structure P3 is greater than the area ratio corresponding to the first sub-electrode 241 in the blue sub-pixel structure P1 and less than the area ratio corresponding to the first sub-electrode 241 in the green sub-pixel structure P2.

[0201] The area ratio corresponding to the third sub-electrode 243 in the red sub-pixel structure P3 is greater than the area ratio corresponding to the third sub-electrode 243 in the green sub-pixel structure P2 and less than the area ratio corresponding to the third sub-electrode 243 in the blue sub-pixel structure P1.

[0202] The area ratio corresponding to the second sub-electrode 242 in the red sub-pixel structure P3 is equal to the area ratio corresponding to the second sub-electrode 242 in the green sub-pixel structure P2 and greater than the area ratio corresponding to the second sub-electrode 242 in the blue sub-pixel structure P1.

[0203] Exemplarily, the area ratios of the first sub-electrode 241, the third sub-electrode 243 and the second sub-electrode 242 in the blue sub-pixel structure P1 can be 10%, 30% and 60% respectively; the area ratios of the first sub-electrode 241, the third sub-electrode 243 and the second sub-electrode 242 in the red sub-pixel structure P3 can be 15%, 35% and 50% respectively; and the area ratios of the first sub-electrode 241, the third sub-electrode 243 and the second sub-electrode 242 in the green sub-pixel structure P2 can be 20%, 35% and 45% respectively.

[0204] The area ratios between the sub-electrodes in the blue sub-pixel structure P1 and the red sub-pixel structure P3 change linearly.

[0205] By setting the area ratio distribution between the sub-electrodes in different sub-pixel structures P, the color display of the pixel area PA can be optimized.

[0206] Based on the same inventive concept, in some embodiments, a display device is also provided, which can include ​ Any of the display panels described above.

[0207] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0208] Finally, it should be noted that the terms "first" and "second", and the like, herein do not denote any order, quantity, combination or importance, but are used to identify one element from another, and do not imply referring to a certain number or a certain order. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an indefinite article "a" or "an" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0209] The above detailed description of a display panel and a display device provided by the present disclosure has been described in detail, and the principles and implementation manners of the present disclosure are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present disclosure and its core idea; meanwhile, for those skilled in the art, according to the idea of the present disclosure, the specific implementation manners and application ranges will be changed, and the above description should not be understood as a limitation of the present disclosure.

[0210] Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specification and practice of the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure following, in general, the principles of the present disclosure and including such departures from the present disclosure that come within known or customary practice within the art to which the present disclosure pertains. The specification and examples are to be considered exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0211] It should be understood that the present disclosure is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

[0212] As used herein, the term "one embodiment", "an embodiment", or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0213] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order not to obscure the understanding of this description.

[0214] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word comprising does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed having the same reference numerals and can thus constitute means for performing the same function, even if they are not explicitly mentioned as such. The use of the terms first, second and third, etc. does not imply any ordering, but rather are used for naming purposes only. Features, steps or elements of the various aspects described herein can be combined and / or eliminated to produce suitable combinations and / or subcombinations and the disclosure should be construed to cover any such suitable combinations and / or subcombinations.

[0215] Finally, it should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. It is appreciated that features of the application that are, individually, known in the art can be ascribed to this application when, in connection with the application, new features have been achieved that have not been previously known in the art.

Claims

1. A display panel, characterized by, The display panel comprises a plurality of pixel areas (PA), each of which comprises a plurality of sub-pixel structures (P), each of which comprises oppositely arranged first and second substrates and optical material (207) between the first and second substrates, the first substrate comprises a first electrode pattern (202), the second substrate comprises a second electrode pattern (204), and the normal projection of the first electrode pattern (202) on the first substrate at least partially overlaps the normal projection of the second electrode pattern (204) on the first substrate; The optical material (207) is configured to reflect or allow light to pass under the action of an electric field formed between the first electrode pattern (202) and the second electrode pattern (204), and the optical material (207) in different sub-pixel structures (P) in one pixel area (PA) is configured to reflect light of different colors; wherein, The display panel further comprises at least one of: A first structure (100) is arranged on the side of the pixel area (PA) close to the display surface of the display panel and is configured to adjust the brightness of the light reflected by the optical material (207) in the pixel area (PA); A second structure is arranged on the second electrode pattern (204) or the first electrode pattern (202) and is configured to adjust the electric field size of different regions in the sub-pixel structure (P).

2. The display panel of claim 1, wherein, The first structure (100) comprises: A third substrate is located on the side of the pixel area (PA) close to the display surface and comprises a third electrode pattern (104); A fourth substrate is opposite to the third substrate and comprises a fourth electrode pattern (102), the normal projection of the third electrode pattern (104) and the fourth electrode pattern (102) on the third substrate at least partially overlaps and has a first overlapping area (11); A liquid crystal layer (107) is located between the third substrate and the fourth substrate, and the deflection angle of the liquid crystal in the liquid crystal layer (107) is controlled by the electric field between the third electrode pattern (104) and the fourth electrode pattern (102); Wherein, the first overlapping area (11) covers the second overlapping area (22) of the normal projection of the first electrode pattern (202) and the second electrode pattern (204) on the third substrate.

3. The display panel of claim 1, wherein, The second structure comprises: A plurality of sub-electrodes are located on the side of the second substrate and are arranged at intervals in the plane direction of the second substrate to form the second electrode pattern (204), and the plurality of sub-electrodes are insulated from each other; A plurality of thin film transistors are connected to the plurality of sub-electrodes, respectively, and the plurality of thin film transistors are independent and insulated from each other.

4. The display panel of claim 3, wherein, The areas of the normal projections of the plurality of sub-electrodes on the second substrate are different.

5. The display panel of claim 4, wherein, The normal projections of the plurality of sub-electrodes on the second substrate are arranged in a regular pattern.

6. The display panel of claim 4, wherein, The areas of the normal projections of the plurality of sub-electrodes on the second substrate satisfy a linear variation relationship.

7. The display panel of claim 3, wherein, The plurality of sub-electrodes comprises a first sub-electrode (241), a second sub-electrode (242) and a third sub-electrode (243), an area of an orthographic projection of the first sub-electrode (241) on the second substrate is less than an area of an orthographic projection of the third sub-electrode (243) on the second substrate, and the area of the orthographic projection of the third sub-electrode (243) on the second substrate is less than an area of an orthographic projection of the second sub-electrode (242) on the second substrate; The second sub-electrode (242) comprises a first region (2421), a second region (2422) and a third region (2423) located on opposite sides of the first region (2421), respectively, the first sub-electrode (241) is located between the first region (2421) and the second region (2422), and the third sub-electrode (243) is located between the first region (2421) and the third region (2423).

8. The display panel of claim 7, wherein, The plurality of sub-pixel structures (P) in the pixel area (PA) comprises a blue sub-pixel structure (P1), a red sub-pixel structure (P3) and a green sub-pixel structure (P2); The area ratio corresponding to the first sub-electrode (241) in the red sub-pixel structure (P3) is greater than the area ratio corresponding to the first sub-electrode (241) in the blue sub-pixel structure (P1) and less than the area ratio corresponding to the first sub-electrode (241) in the green sub-pixel structure (P2); The area ratio corresponding to the third sub-electrode (243) in the red sub-pixel structure (P3) is greater than the area ratio corresponding to the third sub-electrode (243) in the green sub-pixel structure (P2) and less than the area ratio corresponding to the third sub-electrode (243) in the blue sub-pixel structure (P1); The area ratio corresponding to the second sub-electrode (242) in the red sub-pixel structure (P3) is equal to the area ratio corresponding to the second sub-electrode (242) in the green sub-pixel structure (P2) and greater than the area ratio corresponding to the second sub-electrode (242) in the blue sub-pixel structure (P1).

9. The display panel of claim 4, wherein, The total area of the orthographic projection of the second electrode pattern (204) on the first substrate in the plurality of sub-pixel structures (P) is the same.

10. The display panel of any of claims 1-9, wherein, The plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the plane direction of the display surface, or the plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface.

11. The display panel of claim 10, wherein, The plurality of sub-pixel structures (P) in one pixel area (PA) are arranged in the normal direction of the display surface, and the overlapping area between the orthographic projections of the first electrode pattern (202) and the second electrode pattern (204) on the second substrate is a second overlapping area (22); The second overlapping areas (22) of the plurality of sub-pixel structures (P) in one pixel area (PA) overlap each other, and the spacing between the outer contours of the plurality of second overlapping areas (22) is less than 5 μm.

12. The display panel of claim 10, wherein, The plurality of sub-pixel structures (P) in one of the pixel areas (PA) are arranged in the planar direction of the display surface, and the overlapping area between the orthographic projection of the first electrode pattern (202) and the second electrode pattern (204) on the third substrate is a second overlapping area (22); wherein the first structure comprises the third substrate; Wherein, a partition wall (400) is arranged between any two adjacent sub-pixel structures (P), and the orthographic projection of the partition wall (400) on the first substrate encloses the second overlapping area (22).

13. The display panel of claim 10, wherein, The display panel comprises the first structure (100), wherein: In the case that the plurality of sub-pixel structures (P) in one of the pixel areas (PA) are arranged in the planar direction of the display surface, the first structure (100) corresponds to a single sub-pixel structure (P); In the case that the plurality of sub-pixel structures (P) in one of the pixel areas (PA) are arranged in the normal direction of the display surface, the first structure (100) corresponds to a single pixel area (PA).

14. A display device comprising: The display panel comprises any one of claims 1-13.

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