Display panel and display device

Abstract

The display panel and the display device disclosed by the embodiments of the present application have the following advantages: the first pixel region has a first alignment angle difference; the second pixel region has a second alignment angle difference; and the third pixel region has a third alignment angle difference. The cholesteric liquid crystal in the first pixel region has a first pitch, the cholesteric liquid crystal in the second pixel region has a second pitch, and the cholesteric liquid crystal in the third pixel region has a third pitch. The display panel and the display device disclosed by the embodiments of the present application have the following advantages: any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference are different, so that any two of the first pitch, the second pitch and the third pitch are different, thereby prompting the first pixel region, the second pixel region and the third pixel region to display different colors, that is, color display is realized by using one layer of cholesteric liquid crystal, and the structure of the display panel is simplified.

Description

TECHNICAL FIELD

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

[0002] In the conventional cholesteric liquid crystal color electronic paper, a red light emitting glass liquid crystal cell, a green light emitting glass liquid crystal cell and a blue light emitting glass liquid crystal cell are usually adopted, wherein the three glass liquid crystal cells are stacked and connected by double-sided adhesive between adjacent two glass liquid crystal cells.

[0003] In the research and practice of the prior art, the inventors of the present application found that the conventional cholesteric liquid crystal full-color architecture is relatively complex. SUMMARY

[0004] The display panel and the display device provided by the embodiments of the present application can simplify the structure of the display panel.

[0005] The display panel provided by the embodiments of the present application comprises a first substrate and a second substrate arranged oppositely, and a cholesteric liquid crystal arranged between the first substrate and the second substrate, and the display panel comprises a first pixel area, a second pixel area and a third pixel area.

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

[0007] 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 part of the cholesteric liquid crystal located in the first pixel area has a first pitch, the part of the cholesteric liquid crystal located in the second pixel area has a second pitch, and the part of the cholesteric liquid crystal located in the third pixel area has a third pitch, and any two of the first pitch, the second pitch and the third 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 angle of the first alignment portion, the alignment angle of the second alignment portion, and the alignment angle of 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 disposed in the first pixel region, a fifth alignment portion disposed in the second pixel region, and a sixth alignment portion disposed in the third pixel region, and any two of the alignment angle of the fourth alignment portion, the alignment angle of the fifth alignment portion, and the alignment angle of 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 throughout.

[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 angle of the first alignment portion, the alignment angle of the second alignment portion, and the alignment angle of the third alignment portion are different.

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

[0014] Optionally, in some embodiments of the present application, in any two of the first pixel region, the second pixel region, and the third pixel region, the cholesteric liquid crystal is continuously disposed.

[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 further includes a black matrix layer disposed on the side of the first alignment layer close to the first substrate, and in the plan view of the display panel, the black matrix layer is disposed at the junction of any two adjacent pixel regions of the first pixel region, the second pixel region, and the third pixel region.

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

[0017] Optionally, in some embodiments of the present application, the display panel further comprises a barrier wall disposed between the first substrate and the second substrate, the barrier wall is disposed at a boundary between any two adjacent pixel regions of the first pixel region, the second pixel region and the third pixel region, and the barrier wall separates the cholesteric liquid crystal.

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

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

[0020] Correspondingly, the present application also provides a display device comprising the display panel as described in any one of the above embodiments.

[0021] The display panel and the display device of the present application have the following advantages: in the first pixel region, the first alignment layer has a first alignment angle and the second alignment layer has a second alignment angle, the first alignment angle and the second alignment angle have a first alignment angle difference; in the second pixel region, the first alignment layer has the first alignment angle and the second alignment layer has the second alignment angle, the first alignment angle and the second alignment angle have a second alignment angle difference; in the third pixel region, the first alignment layer has the first alignment angle and the second alignment layer has the second alignment angle, the first alignment angle and the second alignment angle have a third alignment angle difference. The cholesteric liquid crystal has a first pitch in the first pixel region, a second pitch in the second pixel region, and a third pitch in the third pixel region.

[0022] The display panel and the display device of the present application have the following advantages: by setting any two of the first alignment angle difference, the second alignment angle difference and the third alignment angle difference to be different, any two of the first pitch, the second pitch and the third pitch are different, so that the first pixel region, the second pixel region and the third pixel region display different colors. It can be understood that, compared with the prior art, the display panel and the display device of the present application realize color display by using one layer of cholesteric liquid crystal, and simplify the structure of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the display panel provided by the present application;

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

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

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

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

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

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific implementations 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 embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawings; and "inner" and "outer" are used in relation to the outline of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose numerical requirements or establish sequences.

[0030] The present application provides a display panel and a display device, which will be described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

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

[0032] In Figure 1 , 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 one of the first pixel region R, the second pixel region G and the third pixel region B displays green color, the second one displays blue color and the third one displays red color. Hereinafter, the first pixel region R is taken as an example to illustrate that the first pixel region R displays red color, the second pixel region G displays green color and the third pixel region B displays blue color.

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

[0035] Please refer to Figure 1 The display panel 100 provided by the embodiments of the present application includes a first substrate 10 and a second substrate 20 arranged oppositely, and a cholesteric liquid crystal 30 arranged 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 arranged on the 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 arranged on the side of the second substrate 21 close to the cholesteric liquid crystal 30.

[0037] 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 part of the cholesteric liquid crystal 30 located in the first pixel region R has a first pitch, the part of the cholesteric liquid crystal 30 located in the second pixel region G has a second pitch, and the part of the cholesteric liquid crystal 30 located in the third pixel region B has a third pitch. Any two of the first pitch, the second pitch and the third pitch are different.

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

[0040] Therefore, the display panel 100 according to the embodiments of the present application is configured such that any two of the first pitch, the second pitch and the third pitch are different, that is, the first alignment angle difference of the first pixel region R, the second alignment angle difference of the second pixel region G and the third alignment angle difference of the third pixel region B are all different, so that the first pitch of the cholesteric liquid crystal 30 of the first pixel region R, the second pitch of the cholesteric liquid crystal 30 of the second pixel region G and the third pitch of the cholesteric liquid crystal 30 are all different.

[0041] Based on this, according to formula 2: λ = nP, it can be known that the cholesteric liquid crystal 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 configuring the pitches of the cholesteric liquid crystal 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 facilitating 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 difference between the alignment angles is π / 4, the reflection wavelength is blue, and the wavelength range is 457 nanometers to 520 nanometers; when the difference between the alignment angles is 5π / 12, the reflection wavelength is green, and the wavelength range is 505 nanometers to 574 nanometers; when the difference between the alignment angles 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 according to the embodiments of the present application can realize color display by using one layer of cholesteric liquid crystal 30, thereby simplifying the structure of the display panel 100.

[0044] Optionally, in some embodiments of the present application, the second substrate 20 includes a plurality of pixel electrodes, a plurality of thin film transistors and a driving circuit. The driving circuit can provide a driving voltage for each pixel electrode of each pixel region, so that the electric field of each pixel region can be controlled individually, thereby the liquid crystal state of the corresponding region can be controlled to realize gray scale change.

[0045] The first substrate 10 further comprises 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 can also be provided on the second substrate 20. It needs to be explained that as long as the display panel 100 can form an electric field to control the state of the cholesteric liquid crystal 30, the present application does not make specific limitations.

[0047] Optionally, in some embodiments of the present application, one of the first alignment layer 12 and the second alignment layer 22 comprises a first alignment portion px1 provided in the first pixel area R, a second alignment portion px2 provided in the second pixel area G, and a third alignment portion px3 provided in the third pixel area B, and the alignment angle 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 all the same.

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

[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, and 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, so that by adjusting only one of the first alignment layer 12 and the second alignment layer 22 with different alignment angles, the cholesteric liquid crystal 30 with different pitches corresponding to different pixel areas can be realized.

[0050] It needs to be explained that the following is described by taking an example that the first alignment layer 12 comprises the first alignment portion px1 to the third alignment portion px3, and the second alignment layer 22 comprises the fourth alignment portion px4 to the sixth alignment portion px6, but is not limited thereto. For example, the second alignment layer 22 can comprise the first alignment portion px1 to the third alignment portion px3, and the first alignment layer 12 can comprise the fourth alignment portion px4 to the sixth alignment portion px6.

[0051] That is, since the first alignment portion px1 to the third alignment portion 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 by adjusting the alignment angle of each of the fourth alignment portion px4 to the sixth alignment portion 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. Here, it refers to that the one of the first alignment layer 12 and the second alignment layer 22 has a uniform alignment angle on the whole surface. This can reduce the difficulty of preparation.

[0053] Optionally, the first alignment layer 12 is formed by coating the liquid alignment material on the whole surface and then forming the first alignment layer 12 with the same alignment angle.

[0054] Optionally, the first alignment layer 12 and the second alignment layer 22 are prepared by the following method:

[0055] Please refer to Figure 2 The 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 the first alignment layer 12 with a single alignment angle. The wavelength of the light irradiation of the first photo-alignment liquid 12a can be one of 254 nm, 313 nm, or 365 nm.

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

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

[0058] That is, the different alignment angles of different alignment portions are realized by controlling the light transmission amount of the grating and the angle of rotating the grating.

[0059] Optionally, the wavelength of the light irradiation of the second photo-alignment liquid 22a can be one of 254 nm, 313 nm, or 365 nm.

[0060] Optionally, in some embodiments of the present application, the present application can also be that 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 angle of the first alignment part px1, the alignment angle of the second alignment part px2 and the alignment angle of the third alignment part px3 are different. Any two of the alignment angle of the fourth alignment part px4, the alignment angle of the fifth alignment part px5 and the alignment angle of the sixth alignment part px6 are different.

[0061] Since the first alignment part px1 to the sixth alignment part px6 can be adjusted flexibly, the range and flexibility of adjusting the first alignment angle, the second alignment angle and the third alignment angle are improved to adapt to more requirements.

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

[0063] The cholesteric liquid crystal 30 is continuously arranged in the first pixel region R to the third pixel region B, that is, the cholesteric liquid crystal 30 is continuously arranged in the whole layer between the first substrate 10 and the second substrate 20. It should be noted that the cholesteric liquid crystal 30 with different pitches in different pixel regions is realized by adopting different alignment angle differences, so that the cholesteric liquid crystal 30 can be continuously arranged in the whole layer to save the coffer for blocking or accommodating the cholesteric liquid crystal in the display area.

[0064] Please refer to Figure 4 , Figure 4 The schematic view of the display panel 100 of one or more embodiments of the present application is shown. Compared with the display panel 100 of each of the above embodiments, Figure 4 The display panel 100 of the corresponding embodiment increases the 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 comprises a black matrix layer bm arranged on the side of the first alignment layer 12 close to the first substrate 11. In the top view of the display panel 100, the black matrix layer bm is arranged at the junction of any two adjacent pixel regions of the first pixel region R, the second pixel region G and the third pixel region B.

[0066] It can be understood that, due to the different alignment angles of the alignment portions of the two adjacent pixel regions, and in the process of preparing the alignment portions with different alignment angles, there may be a situation that the alignment deviation occurs at the junction of the two adjacent alignment portions, so that the liquid crystal pitch at this position is different, thereby causing the reflection wavelength of 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 the two adjacent pixel regions, which can shield the cholesteric liquid crystal 30 at the junction of the pixel regions, so as to shield the deviated light wavelength and improve the display effect.

[0067] 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 black matrix layer bm in the top view of the display panel 100.

[0068] It can be understood that the black matrix layer bm simultaneously occupies the edge portions of the two alignment portions located at the junction of the pixel regions, so as to better shield the deviated light wavelength.

[0069] Please refer to Figure 5 , Figure 5 The schematic view of the display panel 100 of one or more embodiments of the present application is shown. Compared with the prior art Figure 1 The corresponding display panel 100, Figure 5 The display panel 100 of the corresponding embodiment increases the dam.

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

[0071] It can be understood that, by disposing the dam dam at the junction of the adjacent pixel regions, the cholesteric liquid crystal 30 can avoid the junction of the pixel regions, thereby reducing the risk of reflecting the deviated light wavelength by the cholesteric liquid crystal 30.

[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 dam dam.

[0073] It can be understood that the dam dam simultaneously occupies the edge portions of the two alignment portions located 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, thereby reducing the risk of reflecting the deviated light wavelength by the cholesteric liquid crystal 30.

[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 of reflected light between two adjacent pixel regions, and can also absorb deviant light wavelengths, further improving the display effect.

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

[0076] Please refer to Figure 6 , Figure 6 A display device 1000 of one or more embodiments of the present application is shown. The embodiments of the present application also provide 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 can 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 embodiments of the present application is similar or identical to the structure of the display panel 100 of any corresponding embodiment in the Figures 1 to 5 above, and thus will not be described here again.

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

[0080] The display device of the embodiments of the present application has any two of the first alignment angle difference, the second alignment angle difference, and the third alignment angle difference different, so that any two of the first pitch, the second pitch, and the third pitch are different, thereby prompting the first pixel region, the second pixel region, and the third pixel region to display different colors. It can be understood that, compared with the prior art, the display device of the embodiments of the present application realizes color display by using one layer of cholesteric liquid crystal, and simplifies the structure of the display device 1000.

[0081] The above describes in detail the display panel and the display device provided by the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

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

2. The display panel of claim 1, wherein, One of the first alignment layer and the second alignment layer comprises a first alignment part disposed in the first pixel region, a second alignment part disposed in the second pixel region and a third alignment part disposed in the third pixel region, and the alignment angle of the first alignment part, the alignment angle of the second alignment part and the alignment angle of the third alignment part are all the same; The other of the first alignment layer and the second alignment layer comprises a fourth alignment part disposed in the first pixel region, a fifth alignment part disposed in the second pixel region and a sixth alignment part disposed in the third pixel region, and any two of the alignment angle of the fourth alignment part, the alignment angle of the fifth alignment part and the alignment angle of the sixth alignment part are different.

3. The display panel of claim 2, wherein, One of the first alignment layer and the second alignment layer has a uniform alignment angle throughout.

4. The display panel of claim 1, wherein, One of the first alignment layer and the second alignment layer comprises a first alignment part disposed in the first pixel region, a second alignment part disposed in the second pixel region and a third alignment part disposed in the third pixel region, and at least two of the alignment angle of the first alignment part, the alignment angle of the second alignment part and the alignment angle of the third alignment part are different; The other of the first alignment layer and the second alignment layer comprises a fourth alignment part disposed in the first pixel region, a fifth alignment part disposed in the second pixel region and a sixth alignment part disposed in the third pixel region, and any two of the alignment angle of the fourth alignment part, the alignment angle of the fifth alignment part and the alignment angle of the sixth alignment part are different.

5. The display panel according to any one of claims 2-4, characterized in that, In any two of the first pixel region, the second pixel region and the third pixel region, the cholesteric liquid crystal is continuously disposed.

6. The display panel of claim 5, wherein, The first substrate is located at a display side of the display panel, and further comprises a black matrix layer arranged on a side of the first alignment layer close to the first substrate, the black matrix layer is arranged at a junction of any two adjacent pixel regions of the first pixel region, the second pixel region and the third pixel region in a top plan view of the display panel.

7. The display panel of claim 6, wherein, In a top plan view of the display panel, any two adjacent ones of the fourth alignment part, the fifth alignment part and the sixth alignment part partially overlap with the black matrix layer.

8. The display panel according to any one of claims 2-4, wherein, The display panel further comprises a barrier wall arranged between the first substrate and the second substrate, the barrier wall is arranged at the junction of any two adjacent pixel regions of the first pixel region, the second pixel region and the third pixel region, and the barrier wall separates the cholesteric liquid crystal.

9. The display panel of claim 8, wherein, The barrier wall is black in color.

10. The display panel of claim 8, wherein, In a top plan view of the display panel, any two adjacent ones of the fourth alignment part, the fifth alignment part and the sixth alignment part partially overlap with the barrier wall.

11. A display device, characterized by comprising: The display panel comprises any one of the display panels according to claims 1-10.

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