Display panel and display equipment

Abstract

The embodiment of the invention discloses a display panel and display equipment. A first pixel region has a first alignment angle difference; the second pixel region has a second alignment angle difference; the third pixel region has a third alignment angle difference. The portion, located in the first pixel area, of the cholesteric liquid crystal has a first screw pitch, the portion, located in the second pixel area, of the cholesteric liquid crystal has a second screw pitch, and the portion, located in the third pixel area, of the cholesteric liquid crystal has a third screw pitch. According to the display panel and the display equipment provided by the embodiment of the invention, any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference are set to be different, so that any two of the first screw pitch, the second screw pitch and the third screw pitch are different; therefore, the first pixel area, the second pixel area and the third pixel area are promoted to display different colors, that is, one layer of cholesteric liquid crystal is adopted to realize color display, and the structure of the display panel is simplified.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In traditional cholesteric liquid crystal color electronic paper, a layer of glass liquid crystal box emitting red light, a layer of glass liquid crystal box emitting green light, and a layer of glass liquid crystal box emitting blue light are usually used, wherein the three layers of glass liquid crystal boxes are stacked and two adjacent layers are connected by double-sided tape.

[0003] In the process of studying and practicing the prior art, the inventors of the present application found that the full-color architecture of the traditional cholesteric liquid crystal is relatively complex. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a display device, which can simplify the structure of the display panel.

[0005] The embodiment of the present application provides a display panel, comprising a first substrate and a second substrate arranged opposite to each other, and a cholesteric liquid crystal arranged between the first substrate and the second substrate, wherein the display panel comprises a first pixel region, a second pixel region and a third pixel region;

[0006] The first substrate comprises a first substrate and a first alignment layer arranged on a side of the first substrate close to the cholesteric liquid crystal, and the second substrate comprises a second substrate and a second alignment layer arranged on a side of the second substrate close to the cholesteric liquid crystal;

[0007] Wherein, in the first pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a first alignment angle difference; in the second pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a second alignment angle difference; in the third pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a third alignment angle difference; any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference are different;

[0008] The portion of the cholesteric liquid crystal located in the first pixel area has a first spiral pitch, the portion of the cholesteric liquid crystal located in the second pixel area has a second spiral pitch, and the portion of the cholesteric liquid crystal located in the third pixel area has a third spiral pitch, and any two of the first spiral pitch, the second spiral pitch and the third spiral pitch are different.

[0009] Optionally, in some embodiments of the present application, one of the first alignment layer and the second alignment layer includes a first alignment portion disposed in the first pixel region, a second alignment portion disposed in the second pixel region, and a third alignment portion disposed in the third pixel region, and the alignment angles of the first alignment portion, the second alignment portion, and the third alignment portion are all the same;

[0010] The other of the first alignment layer and the second alignment layer includes a fourth alignment portion arranged in the first pixel area, a fifth alignment portion arranged in the second pixel area, and a sixth alignment portion arranged in the third pixel area, and any two of the alignment angles of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion are different.

[0011] Optionally, in some embodiments of the present application, one of the first alignment layer and the second alignment layer has a uniform alignment angle over the entire surface.

[0012] Optionally, in some embodiments of the present application, one of the first alignment layer and the second alignment layer includes a first alignment portion disposed in the first pixel region, a second alignment portion disposed in the second pixel region, and a third alignment portion disposed in the third pixel region, and at least two of the alignment angles of the first alignment portion, the second alignment portion, and the third alignment portion are different;

[0013] The other of the first alignment layer and the second alignment layer includes a fourth alignment portion arranged in the first pixel area, a fifth alignment portion arranged in the second pixel area, and a sixth alignment portion arranged in the third pixel area, and any two of the alignment angles of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion are different.

[0014] Optionally, in some embodiments of the present application, in any two pixel regions among the first pixel region, the second pixel region and the third pixel region, the cholesteric liquid crystals are continuously arranged.

[0015] Optionally, in some embodiments of the present application, the first substrate is located on the display side of the display panel, and the first substrate also includes a black matrix layer arranged on the side of the first alignment layer close to the first substrate, and in the top plan view of the display panel, the black matrix layer is arranged at the junction of any two adjacent pixel areas among the first pixel area, the second pixel area and the third pixel area.

[0016] Optionally, in some embodiments of the present application, in a top plan view of the display panel, any two adjacent ones of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion partially overlap with the black matrix layer.

[0017] Optionally, in some embodiments of the present application, the display panel further includes a retaining wall disposed between the first substrate and the second substrate, the retaining wall being disposed at the junction of any two adjacent pixel areas among the first pixel area, the second pixel area and the third pixel area, and the retaining wall separates the cholesteric liquid crystal.

[0018] Optionally, in some embodiments of the present application, the color of the retaining wall is black.

[0019] Optionally, in some embodiments of the present application, any two adjacent ones of the fourth alignment portion, the fifth alignment portion and the sixth alignment portion partially overlap with the retaining wall.

[0020] Correspondingly, an embodiment of the present application further provides a display device, which includes a display panel as described in any one of the above embodiments.

[0021] In the display panel and display device of the embodiment of the present application, in the first pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a first alignment angle difference; in the second pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a second alignment angle difference; in the third pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a third alignment angle difference. The portion of the cholesteric liquid crystal located in the first pixel area has a first helical pitch, the portion of the cholesteric liquid crystal located in the second pixel area has a second helical pitch, and the portion of the cholesteric liquid crystal located in the third pixel area has a third helical pitch.

[0022] The display panel and the display device of the embodiment of the present application set any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference to be different, so that any two of the first pitch, the second pitch and the third pitch are different, thereby causing the first pixel area, the second pixel area and the third pixel area to display different colors. It can be understood that compared with the prior art, the display panel and the display device of the embodiment of the present application use a layer of cholesteric liquid crystal to achieve color display, which simplifies the structure of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0024] Figure 2 is a schematic flow chart of preparing a first substrate in a display panel provided in an embodiment of the present application;

[0025] Figure 3 is a schematic flow chart of preparing a second substrate in a display panel provided in an embodiment of the present application;

[0026] Figure 4 is another structural schematic diagram of a display panel provided in an embodiment of the present application;

[0027] Figure 5 is another structural schematic diagram of a display panel provided in an embodiment of the present application;

[0028] Figure 6 It is a schematic diagram of the structure of the display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the various embodiments can be combined with each other but will not be repeated one by one, and in the absence of contrary instructions, the directional words used, such as "upper" and "lower", usually refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.

[0030] The embodiments of the present application provide a display panel and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0031] Please refer to Figure 1 , Figure 1 The cross-sectional structure schematic diagram of the display panel 100 according to one or more embodiments of the present application is shown. Optionally, the display panel 100 can be used in an electronic paper device, but is not limited thereto.

[0032] exist Figure 1 In the embodiment, the display panel 100 includes a first pixel region R, a second pixel region G and a third pixel region B.

[0033] Optionally, the first pixel region R, the second pixel region G and the third pixel region B display green, the second pixel region G and the third pixel region B display blue, and the third pixel region B displays red. The following takes the first pixel region R displaying red, the second pixel region G displaying green and the third pixel region B displaying blue as an example for explanation.

[0034] It is understood that the first pixel region R, the second pixel region G, and the third pixel region B may be arranged in a matrix. The pixels in the pixel region may have a rectangular shape, a diamond shape, or a square shape in a plan view, but the embodiment is not limited thereto. For example, in a plan view, the pixel may have another quadrilateral shape other than a rectangular shape, a diamond shape, or a square shape, another polygonal shape other than a quadrilateral shape, a circular shape, or an elliptical shape.

[0035] Please refer to Figure 1 The embodiment of the present application provides a display panel 100 including a first substrate 10 and a second substrate 20 disposed opposite to each other, and a cholesteric liquid crystal 30 disposed between the first substrate 10 and the second substrate 20 .

[0036] The first substrate 10 includes a first substrate 11 and a first alignment layer 12 disposed on a side of the first substrate 11 close to the cholesteric liquid crystal 30. The second substrate 20 includes a second substrate 21 and a second alignment layer 22 disposed on a side of the second substrate 21 close to the cholesteric liquid crystal 30.

[0037] Among them, in the first pixel region R, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a first alignment angle difference. In the second pixel region G, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a second alignment angle difference. In the third pixel region B, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a third alignment angle difference. Any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference are different.

[0038] The portion of the cholesteric liquid crystal 30 located in the first pixel area R has a first pitch, the portion of the cholesteric liquid crystal 30 located in the second pixel area G has a second pitch, and the portion of the cholesteric liquid crystal 30 located in the third pixel area B has a third pitch, and any two of the first pitch, the second pitch and the third pitch are different.

[0039] Among them, it needs to be explained that in formula 1: In the figure, P0 is the initial pitch of the cholesteric liquid crystal, and P is the pitch of the cholesteric liquid crystal after adjustment. It is the difference in alignment angles between the first alignment layer of the first substrate 10 and the second alignment layer of the second substrate 20, referred to as the alignment angle difference. According to the above formula 1, it can be known that the pitch of the cholesteric liquid crystal can be adjusted by adjusting the alignment angle difference.

[0040] Therefore, the display panel 100 of the embodiment of the present application sets any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference to be different, so that any two of the first pitch, the second pitch and the third pitch are different, that is, by setting the first alignment angle difference of the first pixel area R, the second alignment angle difference of the second pixel area G and the third alignment angle difference of the third pixel area B to be different, the first pitch of the cholesteric liquid crystal 30 of the first pixel area R, the second pitch of the cholesteric liquid crystal 30 of the second pixel area G and the third pitch of the cholesteric liquid crystal 30 are also different.

[0041] Based on this, according to Formula 2: λ=nP, it can be known that cholesteric liquid crystals with different pitches can reflect different wavelengths of light, where λ is the wavelength of light, n is the average refractive index of the cholesteric liquid crystal, and P is the pitch of the cholesteric liquid crystal. Therefore, by setting the pitches of the cholesteric liquid crystals 30 of the first pixel region R, the second pixel region G, and the third pixel region B to be different, the first pixel region R, the second pixel region G, and the third pixel region B can reflect different wavelengths of light, thereby causing the first pixel region R, the second pixel region G, and the third pixel region B to display different colors.

[0042] For example, the initial reflection wavelength of the cholesteric liquid crystal 30 is purple, and the wavelength range is 400 nanometers to 455 nanometers. When the orientation angle difference is π / 4, the reflection wavelength is blue, and the wavelength range is 457 nanometers to 520 nanometers. When the orientation angle difference is 5π / 12, the reflection wavelength is green, and the wavelength range is 505 nanometers to 574 nanometers. When it is 3π / 4, the reflection wavelength is red, and the wavelength range is 640 nanometers to 728 nanometers.

[0043] It should be noted that, compared with the prior art, the display panel 100 of the embodiment of the present application uses only one layer of cholesteric liquid crystal 30 to achieve color display, which simplifies the structure of the display panel 100 .

[0044] Optionally, in some embodiments of the present application, the second substrate 20 includes multiple pixel electrodes, multiple thin film transistors and a driving circuit. The driving circuit can provide a driving voltage to the pixel electrode of each pixel area, so that the electric field of each pixel area can be controlled individually, thereby controlling the liquid crystal state of the corresponding area to achieve grayscale changes.

[0045] The first substrate 10 further includes a transparent electrode layer 13 between the first substrate 11 and the first alignment layer 12. The transparent electrode layer 13 is used to access a common voltage so that an electric field is formed between the first substrate 10 and the second substrate 20 to control the state of the cholesteric liquid crystal 30.

[0046] Optionally, in some embodiments of the present application, the transparent electrode layer 13 may also be disposed on the second substrate 20. It should be explained that as long as the display panel 100 can form an electric field that controls the state of the cholesteric liquid crystal 30, the present application does not impose any specific limitation.

[0047] Optionally, in some embodiments of the present application, one of the first alignment layer 12 and the second alignment layer 22 includes a first alignment portion px1 arranged in the first pixel region R, a second alignment portion px2 arranged in the second pixel region G, and a third alignment portion px3 arranged in the third pixel region B, and the alignment angles of the first alignment portion px1, the second alignment portion px2, and the third alignment portion px3 are all the same.

[0048] The other of the first alignment layer 12 and the second alignment layer 22 includes a fourth alignment portion px4 arranged in the first pixel area R, a fifth alignment portion px5 arranged in the second pixel area G, and a sixth alignment portion px6 arranged in the third pixel area B, and any two of the alignment angles of the fourth alignment portion px4, the fifth alignment portion px5, and the sixth alignment portion px6 are different.

[0049] It can be understood that the alignment angles of the first alignment portion px1 to the third alignment portion px3 of one of the first alignment layer 12 and the second alignment layer 22 are consistent, while the alignment angles of the fourth alignment portion px4 to the sixth alignment portion px6 of the other of the first alignment layer 12 and the second alignment layer 22 are different. It is possible to achieve cholesteric liquid crystals 30 with different pitches corresponding to different pixel areas simply by adjusting one of the different alignment angles in the first alignment layer 12 and the second alignment layer 22.

[0050] The following description will be made by taking the example that the first alignment layer 12 includes the first alignment portion px1 to the third alignment portion px3, and the second alignment layer 22 includes the fourth alignment portion px4 to the sixth alignment portion px6, but the description is not limited thereto. For example, the second alignment layer 22 may include the first alignment portion px1 to the third alignment portion px3, and the first alignment layer 12 may include the fourth alignment portion px4 to the sixth alignment portion px6.

[0051] That is, since the first to third alignment portions px1 to px3 of the first alignment layer 12 have the same alignment angle, the first pixel region R, the second pixel region G and the third pixel region B can have different alignment angle differences simply by adjusting the respective alignment angles of the fourth to sixth alignment portions px4 to px6 of the second alignment layer 22.

[0052] Optionally, in some embodiments of the present application, one of the first alignment layer 12 and the second alignment layer 22 has a uniform alignment angle on the entire surface. Here, it means that the first alignment layer 12 and the second alignment layer 22 having the same alignment angle have a uniform alignment angle on the entire surface to reduce the difficulty of preparation.

[0053] Optionally, the first alignment layer 12 is entirely coated with an alignment material liquid, and then the first alignment layer 12 having the same alignment angle is formed by adopting the same alignment angle method.

[0054] Optionally, the preparation method of the first alignment layer 12 and the second alignment layer 22 is as follows:

[0055] Please refer to Figure 2 A first photo-alignment liquid 12a is coated on the first substrate 11, and then the first photo-alignment liquid 12a is irradiated with ultraviolet light to form a first alignment layer 12 with a single alignment angle. The irradiation wavelength of the first photo-alignment liquid 12a can be one of 254 nanometers, 313 nanometers or 365 nanometers.

[0056] Please refer to Figure 3 , a second photo-alignment liquid 22 a is coated on the second substrate 21 .

[0057] Subsequently, using the grating gs1 as a mask, in the first pixel region R, the grating gs1 is set at a first angle a1 relative to the second substrate 21, and then ultraviolet light is irradiated to form a fourth alignment portion px4; then, in the second pixel region G, the grating gs1 is set at a second angle a2 relative to the second substrate 21, and then ultraviolet light is irradiated to form a fifth alignment portion px5; in the third pixel region B, the grating gs1 is set at a third angle a3 relative to the second substrate 21, and then ultraviolet light is irradiated to form a sixth alignment portion px6.

[0058] That is to say, different alignment angles of different alignment parts are achieved by controlling the light transmittance of the grating and rotating the angle of the grating.

[0059] Optionally, the illumination wavelength of the second photo-alignment liquid 22a may be one of 254 nanometers, 313 nanometers or 365 nanometers.

[0060] Optionally, in some embodiments of the present application, the present application may also be a mode in which different two pixel regions of the first alignment layer 12 and the second alignment layer 22 adopt different alignment angles. For example, at least two of the alignment angles of the first alignment portion px1, the alignment angle of the second alignment portion px2, and the alignment angle of the third alignment portion px3 are different. Any two of the alignment angles of the fourth alignment portion px4, the alignment angle of the fifth alignment portion px5, and the alignment angle of the sixth alignment portion px6 are different.

[0061] Among them, since the first to sixth alignment portions px1 to px6 can each be flexibly adjusted, the breadth and flexibility of adjusting the first alignment angle, the second alignment angle layer and the third alignment angle difference are improved to meet more needs.

[0062] Optionally, in some embodiments of the present application, in any two pixel regions among the first pixel region R, the second pixel region G and the third pixel region B, the cholesteric liquid crystals 30 are continuously arranged.

[0063] The cholesteric liquid crystal 30 is continuously arranged from the first pixel region R to the third pixel region B, that is, the cholesteric liquid crystal 30 is continuously arranged in a whole layer between the first substrate 10 and the second substrate 20. It should be noted that, based on the use of different alignment angle differences to realize cholesteric liquid crystals 30 with different pitches in different pixel regions, the cholesteric liquid crystal 30 can be continuously arranged in a whole layer, so as to save the cofferdam used to partition or accommodate the cholesteric liquid crystal in the display area.

[0064] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a display panel 100 according to one or more embodiments of the present application. Compared with the display panel 100 of the above-mentioned embodiments, Figure 4 The display panel 100 of the corresponding embodiment is further provided with a black matrix layer bm.

[0065] Optionally, in some embodiments of the present application, the first substrate 10 is located on the display side of the display panel 100. The first substrate 10 further includes a black matrix layer bm disposed on a side of the first alignment layer 12 close to the first substrate 11. In a top plan view of the display panel 100, the black matrix layer bm is disposed at the junction of any two adjacent pixel regions among the first pixel region R, the second pixel region G, and the third pixel region B.

[0066] It is understandable that, because the alignment parts of two adjacent pixel regions have different alignment angles, in the process of preparing the alignment parts with different alignment angles, there may be an alignment deviation at the junction of two adjacent alignment parts, which makes the liquid crystal pitch at this location different, thereby causing the wavelength of light reflected by the cholesteric liquid crystal 30 to deviate, resulting in poor display effect. Therefore, the display panel 100 of the embodiment of the present application sets the black matrix layer bm at the junction of two adjacent pixel regions, which can block the cholesteric liquid crystal 30 at the junction of the pixel regions to block the deviated light wavelength and improve the display effect.

[0067] Optionally, in some embodiments of the present application, in a top plan view of the display panel 100 , any two adjacent ones of the fourth alignment portion px4 , the fifth alignment portion px5 , and the sixth alignment portion px6 partially overlap with the black matrix layer bm.

[0068] It can be understood that the black matrix layer bm simultaneously blocks the edge portions of the two alignment portions located at the junction of the pixel regions to better block the deviant light wavelengths.

[0069] Please refer to Figure 5 , Figure 5 FIG. 1 is a schematic diagram of a display panel 100 according to one or more embodiments of the present application. Figure 1 The corresponding display panel 100, Figure 5 The display panel 100 of the corresponding embodiment is further provided with a dam.

[0070] Optionally, in some embodiments of the present application, the display panel 100 further includes a retaining wall dam disposed between the first substrate 10 and the second substrate 20. The retaining wall dam is disposed at the junction of any two adjacent pixel regions among the first pixel region R, the second pixel region G, and the third pixel region B, and the retaining wall dam separates the cholesteric liquid crystal 30.

[0071] It can be understood that by arranging the dam at the junction of adjacent pixel areas, the cholesteric liquid crystal 30 can avoid the junction of the pixel areas, thereby reducing the risk of the cholesteric liquid crystal 30 reflecting deviant light wavelengths.

[0072] Optionally, in some embodiments of the present application, any two adjacent ones of the fourth alignment portion px4 , the fifth alignment portion px5 , and the sixth alignment portion px6 partially overlap with the retaining wall dam.

[0073] It is understandable that the dam occupies the edge portions of the two alignment parts at the junction of the pixel regions, so that the cholesteric liquid crystal 30 is more evenly away from the junction of the pixel regions, reducing the risk of the cholesteric liquid crystal 30 reflecting deviant light wavelengths.

[0074] Optionally, in some embodiments of the present application, the color of the dam is black. The black dam can reduce the risk of crosstalk between reflected light from two adjacent pixel regions, and can also absorb deviant light wavelengths to further improve the display effect.

[0075] In addition, the dam can also shield the thin film transistors and metal wirings on the second substrate 20, such as scanning lines and signal lines, thereby saving the black matrix layer.

[0076] Please refer to Figure 6 , Figure 6 The display device 1000 of one or more embodiments of the present application is shown. The embodiment of the present application further provides a display device 1000, which includes the display panel 100 as described in any one of the above embodiments.

[0077] Optionally, the display device 1000 may be electronic paper, but is not limited thereto.

[0078] It should be noted that the structure of the display panel 100 of the display device 1000 of the embodiment of the present application is similar to Figures 1 to 5 The structure of the display panel 100 of any corresponding embodiment is similar or identical, so it will not be repeated here.

[0079] In the display panel 100 of the display device 1000 of the embodiment of the present application, in the first pixel region R, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a first alignment angle difference; in the second pixel region G, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a second alignment angle difference; in the third pixel region B, the alignment angle of the first alignment layer 12 and the alignment angle of the second alignment layer 22 have a third alignment angle difference. The portion of the cholesteric liquid crystal 30 located in the first pixel region R has a first helical pitch, the portion of the cholesteric liquid crystal 30 located in the second pixel region G has a second helical pitch, and the portion of the cholesteric liquid crystal 30 located in the third pixel region B has a third helical pitch.

[0080] The display device of the embodiment of the present application sets any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference to be different, so that any two of the first pitch, the second pitch and the third pitch are different, thereby causing the first pixel area, the second pixel area and the third pixel area to display different colors. It can be understood that compared with the prior art, the display device of the embodiment of the present application uses a layer of cholesteric liquid crystal to achieve color display, which simplifies the structure of the display device 1000.

[0081] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display panel, comprising a first substrate and a second substrate arranged opposite to each other, and a cholesteric liquid crystal arranged between the first substrate and the second substrate, characterized in that: The display panel includes a first pixel region, a second pixel region and a third pixel region; The first substrate comprises a first substrate and a first alignment layer arranged on a side of the first substrate close to the cholesteric liquid crystal, and the second substrate comprises a second substrate and a second alignment layer arranged on a side of the second substrate close to the cholesteric liquid crystal; Wherein, in the first pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a first alignment angle difference; in the second pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a second alignment angle difference; in the third pixel area, the alignment angle of the first alignment layer and the alignment angle of the second alignment layer have a third alignment angle difference; any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference are different; The portion of the cholesteric liquid crystal located in the first pixel area has a first spiral pitch, the portion of the cholesteric liquid crystal located in the second pixel area has a second spiral pitch, and the portion of the cholesteric liquid crystal located in the third pixel area has a third spiral pitch, and any two of the first spiral pitch, the second spiral pitch and the third spiral pitch are different.

2. The display panel according to claim 1, characterized in that: One of the first alignment layer and the second alignment layer comprises a first alignment portion disposed in the first pixel region, a second alignment portion disposed in the second pixel region, and a third alignment portion disposed in the third pixel region, and the alignment angles of the first alignment portion, the second alignment portion, and the third alignment portion are all the same; The other of the first alignment layer and the second alignment layer includes a fourth alignment portion arranged in the first pixel area, a fifth alignment portion arranged in the second pixel area, and a sixth alignment portion arranged in the third pixel area, and any two of the alignment angles of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion are different.

3. The display panel according to claim 2, characterized in that: One of the first alignment layer and the second alignment layer has a uniform alignment angle over its entire surface.

4. The display panel according to claim 1, characterized in that: One of the first alignment layer and the second alignment layer includes a first alignment portion disposed in the first pixel region, a second alignment portion disposed in the second pixel region, and a third alignment portion disposed in the third pixel region, and at least two of the alignment angles of the first alignment portion, the second alignment portion, and the third alignment portion are different; The other of the first alignment layer and the second alignment layer includes a fourth alignment portion arranged in the first pixel area, a fifth alignment portion arranged in the second pixel area, and a sixth alignment portion arranged in the third pixel area, and any two of the alignment angles of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion are different.

5. The display panel according to any one of claims 2 to 4, characterized in that: In any two pixel regions among the first pixel region, the second pixel region and the third pixel region, the cholesteric liquid crystals are continuously arranged.

6. The display panel according to claim 5, characterized in that: The first substrate is located on the display side of the display panel, and the first substrate also includes a black matrix layer arranged on the side of the first alignment layer close to the first substrate. In the top plan view of the display panel, the black matrix layer is arranged at the junction of any two adjacent pixel areas among the first pixel area, the second pixel area and the third pixel area.

7. The display panel according to claim 6, characterized in that: In a top plan view of the display panel, any two adjacent ones of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion partially overlap with the black matrix layer.

8. The display panel according to any one of claims 2 to 4, characterized in that: The display panel further includes a retaining wall disposed between the first substrate and the second substrate, the retaining wall being disposed at a junction of any two adjacent pixel regions among the first pixel region, the second pixel region and the third pixel region, and the retaining wall separates the cholesteric liquid crystal.

9. The display panel according to claim 8, characterized in that: The color of the retaining wall is black.

10. The display panel according to claim 8, characterized in that: In a top plan view of the display panel, any two adjacent ones of the fourth alignment portion, the fifth alignment portion, and the sixth alignment portion partially overlap with the barrier wall.

11. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-10.

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