Display panel, preparation method for display panel, and display device

Abstract

A display panel (30), a preparation method for the display panel (30), and a display device (10). The display panel (30) comprises an array substrate (100), an electronic paper layer (200) and a color filter substrate (300), wherein the array substrate (100) and the color filter substrate (300) are arranged opposite each other, and the electronic paper layer (200) is arranged between the array substrate (100) and the color filter substrate (300); and the color filter substrate (300) comprises a first substrate (310) and a plurality of color resistors (320), the plurality of color resistors (320) all being arranged at intervals on the first substrate (310), and a color resistor gap (332) being provided between two adjacent color resistors (320). The display panel (30) further comprises refraction structures (410), with each refraction structure (410) being located between two adjacent color resistors (320), and refracting light passing through the corresponding color resistor gap (332), toward the orthographic projection of the color resistors (320), on a surface of the electronic paper layer (200). By means of the above design, the color saturation of a display picture of the display panel (30) and the contrast of the display picture of the display panel (30) can be improved.

Description

Display panel, method for manufacturing display panel, and display device Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a method for manufacturing the display panel, and a display device. Background Technology

[0002] With the development of digital technology, more and more display devices are entering people's lives, such as electronic paper (EP) display panels. Because electronic paper display panels can maintain display for a long time when the power is off, and have advantages such as being lightweight, thin, having low power consumption, and being simple to manufacture, they are becoming increasingly popular.

[0003] With the urgent need for color electronic paper display panels, adding a color filter substrate to existing electronic paper display panels is an important way to achieve color electronic paper displays. However, adding a color filter substrate to current electronic paper display panels results in problems such as low color vibrancy and low contrast when displaying images. Summary of the Invention

[0004] The purpose of this application is to provide a display panel, a method for manufacturing the display panel, and a display device, which can improve the color vibrancy and contrast of the displayed image.

[0005] This application discloses a display panel, which includes an array substrate, an electronic paper layer, and a color filter substrate. The array substrate and the color filter substrate are disposed opposite to each other, and the electronic paper layer is disposed between the array substrate and the color filter substrate. The color filter substrate includes a first substrate and a color resist layer. The color resist layer is disposed on the first substrate and includes a plurality of color resists, which are spaced apart on the first substrate, with a color resist gap between adjacent color resists. The display panel also includes a refractive structure located between two adjacent color resists, which refracts light passing through the color resist gap toward the color resist and projects it onto the surface of the electronic paper layer.

[0006] Optionally, the color filter substrate further includes a transparent protective layer, which is disposed on the color resist layer and located on the side of the color resist layer opposite to the first substrate;

[0007] The first substrate has a strip-shaped trench on the side facing the color resist layer, and the strip-shaped trench is correspondingly arranged with the color resist gap. The inner surface of the strip-shaped trench is an arc surface, and the width direction of the color resist gap is the first direction. The cross section of the strip-shaped trench in the first direction is arc-shaped.

[0008] The refractive index of the first substrate is less than that of the transparent protective layer.

[0009] Optionally, the array substrate includes a second substrate, an active switching layer, and a pixel electrode layer. The active switching layer is disposed on the second substrate, and the pixel electrode layer is disposed on the active switching layer. The active switching layer includes a plurality of active switches, and the pixel electrode layer includes a plurality of pixel electrodes spaced apart. The pixel electrodes are connected to the active switches in a one-to-one correspondence. Two adjacent pixel electrodes, either horizontally or vertically, are respectively a first pixel electrode and a second pixel electrode. An electrode gap is provided between the first pixel electrode and the second pixel electrode, and the width of the electrode gap is smaller than the width of the color resist gap.

[0010] The color resist corresponding to the first pixel electrode is a first color resist, and the color resist corresponding to the second pixel electrode is a second color resist. The projection of the first pixel electrode on the second substrate covers the orthographic projection of the first color resist on the second substrate, and the projection of the second pixel electrode on the second substrate covers the orthographic projection of the second color resist on the second substrate.

[0011] The electronic paper layer includes multiple microcapsules, including a first microcapsule, a second microcapsule, and a third microcapsule;

[0012] The orthographic projections of the first and second color resists onto the second substrate coincide with the orthographic projection of the first microcapsule onto the second substrate;

[0013] The orthographic projection of the first pixel electrode on the second substrate covers the orthographic projection of the second microcapsule on the second substrate, and the orthographic projection of the first color resist on the second substrate does not overlap with the orthographic projection of the second microcapsule on the second substrate;

[0014] The orthographic projection of the second pixel electrode on the second substrate covers the orthographic projection of the third microcapsule on the second substrate, and the orthographic projection of the second color resist on the second substrate does not overlap with the orthographic projection of the third microcapsule on the second substrate;

[0015] The width of the strip groove is equal to the gap between the first color resist and the second color resist; the length of the strip groove in the same direction is equal to the length of the first color resist or the length of the second color resist.

[0016] Optionally, a groove is provided on the side of the first substrate facing the color resist layer. The strip groove and the groove cooperate to form the refractive structure. The groove is hemispherical in shape and corresponds to the center position of every four color resists arranged in a grid pattern.

[0017] Optionally, the depth of the groove is greater than the depth of the strip groove.

[0018] Optionally, the array substrate includes a second substrate, an active switching layer, and a pixel electrode layer. The active switching layer is disposed on the second substrate, and the pixel electrode layer is disposed on the active switching layer. The active switching layer includes a plurality of active switches. The pixel electrode layer includes a gap control electrode and a plurality of spaced pixel electrodes. The pixel electrodes are connected to the active switches one-to-one. Two adjacent pixel electrodes, either horizontally or vertically, are respectively a first pixel electrode and a second pixel electrode. The gap control electrode is located between the first pixel electrode and the second pixel electrode and is not connected to the first pixel electrode and the second pixel electrode.

[0019] The color resist corresponding to the first pixel electrode is a first color resist, and the color resist corresponding to the second pixel electrode is a second color resist. The projection of the first pixel electrode on the second substrate coincides with the orthographic projection of the second color resist on the second substrate, and the projection of the second pixel electrode on the second substrate coincides with the orthographic projection of the second color resist on the second substrate.

[0020] The electronic paper layer includes multiple microcapsules, including a fourth microcapsule and a fifth microcapsule;

[0021] The orthographic projections of the first and second color resists onto the second substrate coincide with the orthographic projection of the fourth microcapsule onto the second substrate;

[0022] The fifth microcapsule corresponds to the color resist gap, and the orthographic projection of the gap control electrode on the second substrate covers the orthographic projection of the fifth microcapsule on the second substrate;

[0023] When the display panel displays a color image, the fifth microcapsule reflects light; when the display panel displays a black image, the fifth microcapsule absorbs light.

[0024] Optionally, the color filter substrate further includes a gap filling layer and a transparent protective layer, wherein the gap filling layer is located within the color resist gap, and the transparent protective layer is disposed on the side of the gap filling layer and the color resist layer facing away from the first substrate;

[0025] The gap filling layer is recessed inward on the side away from the first substrate to form a strip-shaped groove. The inner surface of the strip-shaped groove is an arc surface. The width direction of the color resist gap is the first direction. The cross section of the strip-shaped groove in the first direction is arc-shaped.

[0026] The refractive index of the gap-filling layer is less than that of the transparent protective layer.

[0027] This application also discloses a method for manufacturing a display panel, used to manufacture the display panel described above, the method comprising the steps of:

[0028] Photoresist is applied to one side of the first substrate, and a photoresist pattern is formed.

[0029] A strip-shaped trench is formed at a location on the first substrate where no photoresist is applied, and the strip-shaped trench corresponds to the color resist gap between two adjacent color resists.

[0030] Optionally, after the step of forming strip-shaped trenches at locations where no photoresist is applied to the first substrate, wherein the strip-shaped trenches correspond to the color resist gap positions between two adjacent color resists, the method further includes:

[0031] A groove is formed on one side of the first substrate where a strip trench is formed, and the groove corresponds to the center position of every four color resists arranged in a grid pattern. The depth of the groove is greater than the depth of the strip trench.

[0032] This application also discloses a display device, which includes a driving circuit and a display panel, wherein the driving circuit drives the display panel to display.

[0033] Compared to existing solutions that improve the brightness and color vibrancy of the display panel by adding a front light source, this application addresses the issue of light that originally shone through the gap between two color resistors onto the electronic paper layer, was reflected, and then propagated along the gap between the two color resistors. Instead, by setting a refractive structure between two adjacent color resistors, the light shining through the gap between the two color resistors onto the electronic paper layer is refracted and guided to the electronic paper layer directly below the color resistors. This allows the light to propagate from above the color resistors after reflection. Although this reduces the overall brightness of the display panel, it increases the amount of light propagating from the color resistors, thus eliminating the need for a front light source to improve the color vibrancy and contrast of the display panel. Attached Figure Description

[0034] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0035] Figure 1 is a schematic diagram of a display device according to an embodiment of this application;

[0036] Figure 2 is a schematic diagram of a display panel according to the first embodiment of this application;

[0037] Figure 3 is a cross-sectional schematic diagram of a pixel electrode according to the first embodiment of this application;

[0038] Figure 4 is a planar schematic diagram of a pixel electrode, microcapsule and color resist combination according to the first embodiment of this application;

[0039] Figure 5 is a schematic diagram of a groove according to the first embodiment of this application;

[0040] Figure 6 is a schematic diagram of a gap control electrode according to the first embodiment of this application;

[0041] Figure 7 is a schematic diagram of a strip-shaped opening for a color resist according to the first embodiment of this application;

[0042] Figure 8 is a schematic diagram of a blue color resist according to the first embodiment of this application;

[0043] Figure 9 is a schematic diagram of a refractive structure disposed at a corresponding strip-shaped opening according to the first embodiment of this application;

[0044] Figure 10 is a schematic diagram of a white color resist according to the first embodiment of this application;

[0045] Figure 11 is a schematic diagram of a refractive structure according to a second embodiment of this application;

[0046] Figure 12 is a schematic diagram of a display panel manufacturing process according to the first embodiment of this application;

[0047] Figure 13 is a schematic diagram of a display panel fabrication process according to the first embodiment of this application.

[0048] Among them, 10 is a display device; 20 is a driving circuit; 30 is a display panel; 100 is an array substrate; 110 is a second substrate; 120 is an active switching layer; 121 is an active switch; 130 is a pixel electrode layer; 131 is a pixel electrode; 141 is a first pixel electrode; 142 is a second pixel electrode; 143 is a gap control electrode; 200 is an electronic paper layer; 210 is a microcapsule; 211 is a first microcapsule; 212 is a second microcapsule; 213 is a third microcapsule; 214 is a fourth microcapsule; 215 is a fifth microcapsule; 300 is a color filter substrate; 310 is a first substrate; 311 is a common electrode; 320 is a color resist; 321 is a first color resist; 32 2. Second color resist; 331. Color resist opening; 332. Color resist gap; 341. First sub-color resist; 342. Second sub-color resist; 350. Red color resist; 351. First red sub-color resist; 352. Second red sub-color resist; 360. Green color resist; 361. First green sub-color resist; 362. Second green sub-color resist; 370. Blue color resist; 371. First blue sub-color resist; 372. Second blue sub-color resist; 373. Third blue sub-color resist; 380. White color resist; 410. Refractive structure; 411. Striped groove; 412. Groove; 413. Gap filling layer; 420. Transparent protective layer; 430. Transparent insulating layer; 500. Photoresist. Detailed Implementation

[0049] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0050] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0051] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0054] Figure 1 is a schematic diagram of a display device according to an embodiment of this application. As shown in Figure 1, this application discloses a display device 10, which includes a driving circuit 20 and a display panel 30. The driving circuit 20 drives the display panel 30 to display.

[0055] The display panel 30 is an electronic paper display panel 30, which includes an electronic paper layer 200. The electronic paper layer 200 can be composed of microcapsules 210 or microcup structures. This application uses the electronic paper layer 200 including microcapsules 210 as an example for explanation. The particles in the microcapsules 210 can include black and white particles or colored particles. When the particles in the microcapsules 210 include colored particles, the color of the colored particles needs to be the same as the color resist 320 above.

[0056] This application also discloses a display panel 30, which can be used in the display device 10 described above. Regarding the display panel 30, this application provides the following design, which is specifically described through several embodiments:

[0057] Example 1:

[0058] Figure 2 is a schematic diagram of a display panel according to the first embodiment of this application. As shown in Figure 2, the arrows in Figure 2 indicate the path of some light rays passing through the refractive structure. This application discloses a display panel 30, which includes an array substrate 100, an electronic paper layer 200, and a color filter substrate 300. The array substrate 100 and the color filter substrate 300 are disposed opposite to each other, and the electronic paper layer 200 is disposed between the array substrate 100 and the color filter substrate 300. The array substrate 100 and the color filter substrate 300 drive the particles in the electronic paper layer 200 to move, thereby displaying an image.

[0059] The color filter substrate 300 includes a first substrate 310 and a color resist layer. The color resist layer is disposed on the first substrate 310 and includes a plurality of color resists 320, which are spaced apart on the first substrate 310. A color resist gap 332 is provided between two adjacent color resists 320. The display panel 30 also includes a refractive structure 410, which is located between two adjacent color resists 320. The refractive structure 410 refracts light passing through the color resist gap 332 towards the color resist 320 and projects it onto the surface of the electronic paper layer 200. In other words, the refractive structure 410 can guide the light passing between two adjacent color resists 320 to the microcapsules directly below the color resists 320 through refraction. Thus, the light can be propagated out of the color resists 320 through reflection from the microcapsules.

[0060] Compared to existing solutions that improve the brightness and color vibrancy of the display panel 30 by adding a front light source, this application improves the display panel 30 by setting a refraction structure 410 between adjacent color resists 320. This allows the light that originally shone through the color resist gap 332 between the two color resists 320 onto the electronic paper layer 200, and then propagated along the color resist gap 332, to be refracted and guided to the electronic paper layer 200 directly below the color resists 320. This allows the reflected light to propagate from above the color resists 320. While this reduces the overall brightness of the display panel 30, it increases the amount of light propagating from the color resists 320, eliminating the need for a front light source and improving the color vibrancy and contrast of the display panel 30.

[0061] This embodiment discloses a reflective structure formed by providing a strip-shaped trench 411 on the side of the first substrate 310 near the color resist layer. For example, the color filter substrate 300 further includes a transparent protective layer 420 and a transparent insulating layer 430. The transparent protective layer 420 is disposed on the color resist layer and is located on the side of the color resist layer away from the first substrate 310. The transparent insulating layer 430 is disposed on the side of the transparent protective layer 420 away from the first substrate 310. The strip-shaped trench 411 is provided on the side of the first substrate 310 facing the color resist layer, and the strip-shaped trench 411 is correspondingly disposed with the color resist gap 332. Simply put, the orthographic projection of the strip-shaped trench 411 covers the color resist gap 332.

[0062] The inner surface of the strip groove 411 is arc-shaped, with the width direction of the color resist gap 332 as the first direction, and the cross-section of the strip groove 411 in the first direction is arc-shaped; the refractive index of the first substrate 310 is less than the refractive index of the transparent protective layer 420. This allows light illuminating the left half of the strip groove 411 to be refracted onto the electronic paper layer 200 directly below the corresponding color resist 320 on the left, and light illuminating the right half of the strip groove 411 to be refracted onto the electronic paper layer 200 directly below the corresponding color resist 320 on the right, thereby increasing the brightness of the color resists 320 on both sides of the strip groove 411.

[0063] Figure 3 is a cross-sectional schematic diagram of a pixel electrode according to the first embodiment of this application, and Figure 4 is a planar schematic diagram of a pixel electrode, microcapsule and color resist according to the first embodiment of this application. Referring to Figures 3-4, the direction indicated by the arrow in Figure 3 is part of the light propagation path. The array substrate 100 includes a second substrate 110, an active switching layer 120 and a pixel electrode layer 130. The active switching layer 120 is disposed on the second substrate 110, and the pixel electrode layer 130 is disposed on the active switching layer 120. The active switching layer 120 includes a plurality of active switches 121.

[0064] The pixel electrode layer 130 includes a plurality of pixel electrodes 131 spaced apart, and the pixel electrodes 131 are connected to the active switch 121 in a one-to-one correspondence. A common electrode 311 is provided on the side of the electronic paper layer 200 away from the second substrate 110. The pixel electrodes 131 and the common electrode 311 drive the movement of particles in the electronic paper layer 200 to display the image.

[0065] Two adjacent pixel electrodes 131, either horizontally or vertically, are respectively the first pixel electrode 141 and the second pixel electrode 142. The first pixel electrode 141 and the second pixel electrode 142 are provided with an electrode gap, that is, the first pixel electrode 141 and the second pixel electrode 142 are arranged at intervals.

[0066] The color resist 320 corresponding to the first pixel electrode 141 is the first color resist 321, and the color resist 320 corresponding to the second pixel electrode 142 is the second color resist 322. Simply put, the first pixel electrode 141 controls the movement of particles below the first color resist 321, and the second pixel electrode 142 controls the movement of particles below the second color resist 322. The first color resist 321 and the second color resist 322 have different colors.

[0067] The projection of the first pixel electrode 141 onto the second substrate 110 covers the orthogonal projection of the first color resist 321 onto the second substrate 110, and the projection of the second pixel electrode 142 onto the second substrate 110 covers the orthogonal projection of the second color resist 322 onto the second substrate 110.

[0068] The electronic paper layer 200 includes a plurality of microcapsules 210, wherein the microcapsules 210 include a first microcapsule 211, a second microcapsule 212, and a third microcapsule 213. The orthographic projection of the first color resist 321 and the second color resist 322 onto the second substrate 110 coincides with the orthographic projection of the first microcapsule 211 onto the second substrate 110; simply put, the microcapsule 210 below the first color resist 321 and the second color resist 322 is the first microcapsule 211.

[0069] The orthographic projection of the first pixel electrode 141 on the second substrate 110 covers the orthographic projection of the second microcapsule 212 on the second substrate 110, and the orthographic projection of the first color resist 321 on the second substrate 110 does not overlap with the orthographic projection of the second microcapsule 212 on the second substrate 110. In simple terms, there is a first microcapsule 211 and a second microcapsule 212 above the first pixel electrode 141, only the first microcapsule 211 is located below the first color resist 321, and the second microcapsule 212 is not located below the first color resist 321.

[0070] The orthographic projection of the second pixel electrode 142 on the second substrate 110 covers the orthographic projection of the third microcapsule 213 on the second substrate 110, and the orthographic projection of the second color resist 322 on the second substrate 110 does not overlap with the orthographic projection of the third microcapsule 213 on the second substrate 110. In simple terms, there are a first microcapsule 211 and a third microcapsule 213 above the second pixel electrode 142, but only the first microcapsule 211 is located below the second color resist 322, and the third microcapsule 213 is not located below the second color resist 322.

[0071] The width of the electrode gap is less than the width of the color resist gap 332, and the width of the strip groove 411 is equal to the color resist gap 332 between the first color resist 321 and the second color resist 322; the length of the strip groove 411 in the same direction is equal to the length of the first color resist 321 or the length of the second color resist 322.

[0072] The second microcapsule 212 and the third microcapsule 213 are located directly below the color-blocking gap 332, and the second microcapsule 212 and the third microcapsule 213 correspond to the left and right sides of the strip groove 411, respectively.

[0073] For example, when the area corresponding to the first pixel electrode 141 needs to display a white image and the area corresponding to the second pixel electrode 142 needs to display a black image.

[0074] White particles in the first microcapsule 211 and the second microcapsule 212 above the first pixel electrode 141 move upwards, while black particles move downwards. This causes the first microcapsule 211 and the second microcapsule 212 above the first pixel electrode 141 to be in a reflective state. This allows some light illuminating the left half of the strip groove 411 to be refracted onto the first microcapsule 211 directly below the corresponding first color resist 321 on the left, and then reflected away from the first color resist 321. Conversely, some light illuminating the left half of the strip groove 411, which is insufficient to refract onto the first microcapsule 211 directly below the corresponding first color resist 321 on the left, will also illuminate the second microcapsule 212, and thus be reflected away from the first color resist 321. This further improves the contrast and color vibrancy of the display panel 30.

[0075] White particles in the first microcapsule 211 and third microcapsule 213 above the second pixel electrode 142 move downwards, while black particles move upwards. This results in the first microcapsule 211 and third microcapsule 213 above the second pixel electrode 142 being in a reverse absorption state. This allows some light illuminating the left half of the strip groove 411 to be refracted onto the first microcapsule 211 directly below the corresponding first color resist 321 on the left, where it is absorbed. Conversely, some light illuminating the left half of the strip groove 411, which is insufficient to refract onto the first microcapsule 211 directly below the corresponding first color resist 321 on the left, also illuminates the second microcapsule 212 and is absorbed. This causes the second pixel electrode 142 to display black, further improving the contrast and color vibrancy of the display panel 30.

[0076] Figure 5 is a schematic diagram of a groove according to the first embodiment of this application. As shown in Figure 5, a groove 412 is provided on the side of the first substrate 310 facing the color resist layer. The strip-shaped trench 411 and the groove 412 cooperate to form the refractive structure 410. The groove 412 is hemispherical in shape, and the groove 412 corresponds to the center position of every four color resists 320 arranged in a grid pattern. The provision of a hemispherical groove 412 on the first substrate 310 at the middle position of the four diagonally arranged color resists 320 can also be understood as the provision of a hemispherical groove 412 on the first substrate 310 at the middle position of the four diagonally arranged pixel electrodes 131.

[0077] The four color resists 320 arranged in a grid pattern have no color resist 320 areas in the top, bottom, left, and right directions at their center. Therefore, light passing through the center of the four color resists 320 in the grid pattern is easily reflected away from these areas. To address this, a hemispherical groove 412 is provided on the first substrate 310 at the center of the four diagonally arranged color resists 320. The groove 412 can refract the light passing through the center of the four color resists 320 in the four diagonal directions (left front, left rear, right front, and right rear), allowing the light to illuminate the microcapsules 210 below the color resists 320, thereby further improving the color vibrancy and contrast of the display panel 30.

[0078] Because the gap width between two diagonally opposite color resists 320 is greater than the gap width 332 between two longitudinally or laterally adjacent color resists 320, this application makes the depth of the groove 412 greater than the depth of the strip groove 411. This results in the refractive index of light passing through the groove 412 being greater than that passing through the strip groove 411, thus allowing more light illuminating the groove 412 to be refracted onto the microcapsule 210 below the color resist 320, avoiding the problem of bright spots appearing at this location.

[0079] Figure 6 is a schematic diagram of a gap control electrode according to the first embodiment of this application. As shown in Figure 6, the microcapsule 210 below the color resist gap 332 between two adjacent color resists can also be individually controlled by setting a gap control electrode 143 on the active switching layer 120 below the color resist gap 332 between two adjacent color resists 320.

[0080] For example, the array substrate 100 includes a second substrate 110, an active switching layer 120, and a pixel electrode layer 130. The active switching layer 120 is disposed on the second substrate 110, and the pixel electrode layer 130 is disposed on the active switching layer 120. The active switching layer 120 includes a plurality of active switches 121, and the pixel electrode layer 130 includes a gap control electrode 143 and a plurality of spaced pixel electrodes 131. The pixel electrodes 131 are connected to the active switches 121 in a one-to-one correspondence.

[0081] Two adjacent pixel electrodes 131, either horizontally or vertically, are the first pixel electrode 141 and the second pixel electrode 142, respectively. The gap control electrode 143 is located between the first pixel electrode 141 and the second pixel electrode 142 and is not connected to the first pixel electrode 141 and the second pixel electrode 142. In simple terms, an independent gap control electrode 143 is specially set between the first pixel electrode 141 and the second pixel electrode 142 to control the fifth microcapsule 215 below the color resist gap 332.

[0082] The color resist 320 corresponding to the first pixel electrode 141 is the first color resist 321, and the color resist 320 corresponding to the second pixel electrode 142 is the second color resist 322. The projection of the first pixel electrode 141 on the second substrate 110 coincides with the orthographic projection of the second color resist 322 on the second substrate 110, and the projection of the second pixel electrode 142 on the second substrate 110 coincides with the orthographic projection of the second color resist 322 on the second substrate 110.

[0083] The electronic paper layer 200 includes a plurality of microcapsules 210, including a fourth microcapsule 214 and a fifth microcapsule 215; the orthographic projections of the first color resist 321 and the second color resist 322 on the second substrate 110 coincide with the orthographic projection of the fourth microcapsule 214 on the second substrate 110; the fifth microcapsule 215 corresponds to the color resist gap 332, and the orthographic projection of the gap control electrode 143 on the second substrate 110 covers the orthographic projection of the fifth microcapsule 215 on the second substrate 110; simply put, the microcapsule 210 located below the first color resist 321 and the second color resist 322 is the fourth microcapsule 214, and the microcapsule 210 located below the color resist gap 332 is the fifth microcapsule 215.

[0084] When the display panel 30 displays a color image, the fifth microcapsule 215 reflects light; when the display panel 30 displays a black image, the fifth microcapsule 215 absorbs light.

[0085] The display panel 30 displaying a color image means that the display panel 30 displays an image with grayscale, including a completely white image. The display panel 30 displaying a black image includes a completely black image or a completely black state when no image is displayed.

[0086] For example, when the display panel 30 displays a color image, the gap control electrode 143 and the common electrode 311 control the white particles in the fifth microcapsule 215 to move upward and the black particles to move downward, so that the fifth microcapsule 215 is in a state of reflecting light, thereby improving color vividness and screen brightness.

[0087] Figure 7 is a schematic diagram of a strip-shaped opening in a color resist according to a first embodiment of this application. As shown in Figure 7, in order to further improve the brightness of the display panel 30, this application also provides an opening on the color resist 320.

[0088] For example, each color resist 320 is provided with at least one color resist opening 331, the color resist opening 331 penetrates the color resist 320, and some light passes through the color resist opening 331 to illuminate the electronic paper layer 200. The color resist opening 331 is strip-shaped, and the cross-sectional shape of the color resist opening 331 in the plane direction of the color resist layer is rectangular. The color resist opening 331 divides the color resist 320 into a first sub-color resist 341 and a second sub-color resist 342. The area of ​​the first sub-color resist 341 is equal to the area of ​​the second sub-color resist 342, and the width between the first sub-color resist 341 and the second sub-color resist 342 is smaller than the width of the color resist gap 332.

[0089] By setting a rectangular color resist opening 331 inside the color resist 320, the color resist 320 is divided into a first sub-color resist 341 and a second sub-color resist 342, so that more light can pass through the color resist opening 331 and irradiate the microcapsule 210, thereby greatly improving the brightness of the display panel 30.

[0090] Furthermore, the width between the first sub-color resist 341 and the second sub-color resist 342 is smaller than the width of the color resist gap 332, which can prevent light shining on the first sub-color resist 341 and the second sub-color resist 342 from being reflected onto the adjacent color resists 320 of different colors, thereby reducing the color shift problem and improving the contrast of the display panel 30.

[0091] Figure 8 is a schematic diagram of a blue color resist according to the first embodiment of this application. As shown in Figure 8, the color resist 320 includes a red color resist 350, a green color resist 360 and a blue color resist 370. The area of ​​the color resist opening 331 in the blue color resist 370 is larger than the area of ​​the color resist opening 331 in the red color resist 350, and the area of ​​the color resist opening 331 in the blue color resist 370 is larger than the area of ​​the opening in the green color resist 360.

[0092] Specifically: each of the color resist openings 331 has the same area, the red color resist 350 has one color resist opening 331, the green color resist 360 has one color resist opening 331, and the blue color resist 370 has two color resist openings 331.

[0093] The color resist opening 331 within the red color resist 350 divides the red color resist 350 into a first red sub-color resist 351 and a second red sub-color resist 352, with the area of ​​the first red sub-color resist 351 being equal to the area of ​​the second red sub-color resist 352.

[0094] The green color resist 360 is divided into a first green sub-color resist 361 and a second green sub-color resist 362 by the color resist opening 331 within the green color resist 360. The area of ​​the first green sub-color resist 361 and the area of ​​the second green sub-color resist 362 are equal.

[0095] The color resist opening 331 within the blue color resist 370 divides the blue color resist 370 into a first blue sub-color resist 371, a second blue sub-color resist 372, and a third blue sub-color resist 373. The areas of the first blue sub-color resist 371, the second blue sub-color resist 372, and the third blue sub-color resist 373 are all equal.

[0096] Because blue light has a short wavelength and weak penetration ability, this application sets the area of ​​the color resist opening 331 in the blue color resist 370 to be larger than the area of ​​the color resist opening 331 in the other color color resists 320, thereby compensating for the brightness of the blue in the display panel 30 and improving the color vividness.

[0097] Figure 9 is a schematic diagram of a refractive structure provided at a corresponding strip opening according to the first embodiment of this application. As shown in Figure 9, a strip groove 411 is also provided at the position of the first substrate 310 corresponding to the color resist opening 331, and the orthographic projection of the strip groove 411 also covers the color resist opening 331. The inner surface of the strip groove 411 is an arc surface, and the width direction of the color resist gap 332 is the first direction. The cross section of the strip groove 411 in the first direction is arc-shaped.

[0098] By setting a strip-shaped groove 411 at the position of the color resist opening 331, the strip-shaped groove 411 can guide the light passing through the color resist opening 331 to the microcapsule 210 below the first sub-color resist 341 and the second sub-color resist 342. Then, through the reflection of the microcapsule 210, the light emitted from the corresponding first sub-color resist 341 and the second sub-color resist 342 will not be reflected again along the position of the color resist opening 331, thereby improving the color vividness and contrast of the display panel 30.

[0099] Figure 10 is a schematic diagram of a white color resist according to the first embodiment of this application. As shown in Figure 10, in order to improve the brightness of the display panel, the color resist 320 also includes a white color resist 380. The red color resist 350, green color resist 360, blue color resist 370 and the white color resist 380 are arranged alternately. Since the white color resist 380 has low light loss, setting the white color resist 380 can improve the display brightness of the entire display panel.

[0100] Example 2:

[0101] Figure 11 is a schematic diagram of a refractive structure according to a second embodiment of this application. As shown in Figure 11, unlike the first embodiment, this embodiment directly sets a refractive structure 410 between two adjacent color resists 320.

[0102] For example: the color filter substrate 300 further includes a gap filling layer 413 and a transparent protective layer 420. The gap filling layer 413 is located within the color resist gap 332, and the transparent protective layer 420 is disposed on the side of the gap filling layer 413 and the color resist layer away from the first substrate 310.

[0103] The gap filling layer 413 is recessed inward on the side opposite to the first substrate 310 to form a strip-shaped groove 411. The inner surface of the strip-shaped groove 411 is an arc surface. The width direction of the color resist gap 332 is the first direction. The cross section of the strip-shaped groove 411 in the first direction is arc-shaped. The refractive index of the gap filling layer 413 is less than that of the transparent protective layer 420.

[0104] Compared to the solution in the first embodiment, this embodiment forms a refractive structure 410 by setting a gap filling layer 413 between two adjacent color resists 320 and recessing the side of the gap filling layer 413 away from the first substrate 310 inward to form a strip-shaped trench 411; it is not necessary to etch strip-shaped trenches on the first substrate 310, making the preparation simpler.

[0105] Furthermore, the gap between the arc surface of the strip groove 411 and the microcapsule 210 is reduced, so that when light is refracted, it will not pass through the color resist 320 before shining on the microcapsule 210 below the color resist 320, thereby reducing light loss and improving the color vividness of the display panel 30.

[0106] Figure 12 is a schematic diagram of a display panel fabrication process according to the first embodiment of this application, and Figure 13 is a schematic diagram of a display panel fabrication process according to the first embodiment of this application. As shown in Figures 12 and 13, this application also discloses a method for fabricating a display panel 30, used to fabricate the display panel 30 in the above embodiments. The method for fabricating the display panel 30 includes the following steps:

[0107] S1: Photoresist is applied to one side of the first substrate, and a photoresist pattern is formed;

[0108] S2: A strip-shaped trench is formed at a position where no photoresist is provided on the first substrate, and the strip-shaped trench corresponds to the position of the color resist gap between two adjacent color resists;

[0109] S3: A color resist is provided on one side of the strip trench on the first substrate;

[0110] S4: A transparent protective layer is provided on the side of the color resist that is away from the first substrate;

[0111] S5: A transparent insulating layer is provided on the side of the transparent protective layer that is away from the first substrate;

[0112] S6: A common electrode is provided on the side of the transparent insulating layer opposite to the first substrate;

[0113] S7: The electronic paper layer and the array substrate are sequentially attached to the side of the transparent insulating layer away from the first substrate.

[0114] In step S2, the formation of the strip-shaped trench 411 can be achieved by etching the first substrate 310 on which the photoresist 500 is disposed using a strong acid or a strong alkali.

[0115] Compared to existing solutions that improve the brightness and color vibrancy of the display panel 30 by adding a front light source, this application improves the display panel 30 by setting a refraction structure 410 between adjacent color resists 320. This allows the light that originally shone through the color resist gap 332 between the two color resists 320 onto the electronic paper layer 200, and then propagated along the color resist gap 332, to be refracted and guided to the electronic paper layer 200 directly below the color resists 320. This allows the reflected light to propagate from above the color resists 320. While this reduces the overall brightness of the display panel 30, it increases the amount of light propagating from the color resists 320, eliminating the need for a front light source and improving the color vibrancy and contrast of the display panel 30.

[0116] Furthermore, the scheme of forming the refractive structure 410 of the strip groove 411 directly on the first substrate 310 does not require setting a separate refractive structure 410 between the two color filters 320, which can reduce the thickness of the entire color filter substrate 300 and improve production efficiency.

[0117] Step S2: A strip-shaped trench is formed at the location where no photoresist is applied to the first substrate. The strip-shaped trench, corresponding to the color resist gap between two adjacent color resists, further includes:

[0118] S21: A groove is formed on one side of the first substrate where a strip trench is formed, and the groove corresponds to the center position of every four color resists arranged in a grid pattern, and the depth of the groove is greater than the depth of the strip trench.

[0119] At the center of the four color resists 320 arranged in a grid pattern, or in other words, at the center of the four pixel electrodes 131 arranged in a grid pattern, there are no color resist 320 areas in the top, bottom, left, and right directions. Therefore, when light passes through the center of the four color resists 320 arranged in a grid pattern, it is easy for it to be reflected away from the areas where there are no color resist 320 areas in the top, bottom, left, and right directions. Therefore, by setting a hemispherical groove 412 on the first substrate 310 at the middle position of the four color resists 320 arranged diagonally, the groove 412 can refract the light passing through the center of the four color resists 320 arranged in a grid pattern to the left front, left rear, right front, and right rear directions, that is, the four diagonal directions, so that the light can illuminate the microcapsules 210 below the color resists 320, thereby further improving the color vividness and contrast of the display panel 30.

[0120] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0121] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0122] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A display panel, the display panel comprising an array substrate, an electronic paper layer, and a color filter substrate, wherein the array substrate and the color filter substrate are disposed opposite to each other, and the electronic paper layer is disposed between the array substrate and the color filter substrate; wherein, The color filter substrate includes a first substrate and a color resist layer. The color resist layer is disposed on the first substrate and includes a plurality of color resists. The plurality of color resists are disposed at intervals on the first substrate, and a color resist gap is provided between two adjacent color resists. The display panel also includes a refractive structure located between two adjacent color resists, which refracts light passing through the color resist gap toward the color resist and projects it onto the surface of the electronic paper layer.

2. The display panel according to claim 1, wherein, The color filter substrate further includes a transparent protective layer, which is disposed on the color resist layer and located on the side of the color resist layer away from the first substrate; The first substrate has a strip-shaped trench on the side facing the color resist layer, and the strip-shaped trench is correspondingly arranged with the color resist gap. The inner surface of the strip-shaped trench is an arc surface, and the width direction of the color resist gap is the first direction. The cross section of the strip-shaped trench in the first direction is arc-shaped. The refractive index of the first substrate is less than that of the transparent protective layer.

3. The display panel according to claim 2, wherein, The array substrate includes a second substrate, an active switching layer, and a pixel electrode layer. The active switching layer is disposed on the second substrate, and the pixel electrode layer is disposed on the active switching layer. The active switch layer includes multiple active switches, and the pixel electrode layer includes multiple pixel electrodes spaced apart. The pixel electrodes are connected to the active switches one by one. Two adjacent pixel electrodes in the horizontal or vertical direction are respectively the first pixel electrode and the second pixel electrode. The first pixel electrode and the second pixel electrode are provided with an electrode gap. The width of the electrode gap is smaller than the width of the color resist gap. The color resist corresponding to the first pixel electrode is a first color resist, and the color resist corresponding to the second pixel electrode is a second color resist. The projection of the first pixel electrode on the second substrate covers the orthogonal projection of the first color resist on the second substrate, and the projection of the second pixel electrode on the second substrate covers the orthogonal projection of the second color resist on the second substrate. The electronic paper layer includes multiple microcapsules, including a first microcapsule, a second microcapsule, and a third microcapsule; The orthographic projections of the first and second color resists onto the second substrate coincide with the orthographic projection of the first microcapsule onto the second substrate; The orthographic projection of the first pixel electrode on the second substrate covers the orthographic projection of the second microcapsule on the second substrate, and the orthographic projection of the first color resist on the second substrate does not overlap with the orthographic projection of the second microcapsule on the second substrate; The orthographic projection of the second pixel electrode on the second substrate covers the orthographic projection of the third microcapsule on the second substrate, and the orthographic projection of the second color resist on the second substrate does not overlap with the orthographic projection of the third microcapsule on the second substrate; The width of the strip groove is equal to the gap between the first color resist and the second color resist; the length of the strip groove in the same direction is equal to the length of the first color resist or the length of the second color resist.

4. The display panel according to claim 3, wherein, The first substrate has a groove on the side facing the color resist layer. The strip groove and the groove cooperate to form the refractive structure. The groove is hemispherical in shape and corresponds to the center position of every four color resists arranged in a grid pattern.

5. The display panel according to claim 4, wherein, The depth of the groove is greater than the depth of the strip groove.

6. The display panel according to claim 2, wherein, The array substrate includes a second substrate, an active switching layer, and a pixel electrode layer. The active switching layer is disposed on the second substrate, and the pixel electrode layer is disposed on the active switching layer. The active switching layer includes a plurality of active switches. The pixel electrode layer includes a gap control electrode and a plurality of spaced pixel electrodes. The pixel electrodes are connected to the active switches one by one. Two adjacent pixel electrodes in the horizontal or vertical direction are respectively a first pixel electrode and a second pixel electrode. The gap control electrode is located between the first pixel electrode and the second pixel electrode and is not connected to the first pixel electrode and the second pixel electrode. The color resist corresponding to the first pixel electrode is a first color resist, and the color resist corresponding to the second pixel electrode is a second color resist. The projection of the first pixel electrode on the second substrate coincides with the orthographic projection of the second color resist on the second substrate, and the projection of the second pixel electrode on the second substrate coincides with the orthographic projection of the second color resist on the second substrate. The electronic paper layer includes multiple microcapsules, including a fourth microcapsule and a fifth microcapsule; The orthographic projections of the first and second color resists onto the second substrate coincide with the orthographic projection of the fourth microcapsule onto the second substrate; The fifth microcapsule corresponds to the color resist gap, and the orthographic projection of the gap control electrode on the second substrate covers the orthographic projection of the fifth microcapsule on the second substrate; When the display panel displays a color image, the fifth microcapsule reflects light; when the display panel displays a black image, the fifth microcapsule absorbs light.

7. The display panel according to claim 1, wherein, The color filter substrate further includes a gap filling layer and a transparent protective layer. The gap filling layer is located within the color resist gap, and the transparent protective layer is disposed on the side of the gap filling layer and the color resist layer away from the first substrate. The gap filling layer is recessed inward on the side away from the first substrate to form a strip-shaped groove. The inner surface of the strip-shaped groove is an arc surface. The width direction of the color resist gap is the first direction. The cross section of the strip-shaped groove in the first direction is arc-shaped. The refractive index of the gap-filling layer is less than that of the transparent protective layer.

8. The display panel according to claim 1, wherein, Each of the color resists has at least one color resist opening, which penetrates the color resist, allowing some light to pass through the color resist opening and illuminate the electronic paper layer.

9. The display panel according to claim 8, wherein, The color resist opening is strip-shaped, and the cross-sectional shape of the color resist opening in the plane direction of the color resist layer is rectangular. The color resist opening divides the color resist into a first sub-color resist and a second sub-color resist.

10. The display panel according to claim 9, wherein, The area of ​​the first sub-color resist is equal to the area of ​​the second sub-color resist, and the width between the first sub-color resist and the second sub-color resist is less than the width of the color resist gap.

11. The display panel according to claim 8, wherein, The color resist includes a red color resist, a green color resist, and a blue color resist. The area of ​​the color resist opening in the blue color resist is larger than the area of ​​the color resist opening in the red color resist, and the area of ​​the color resist opening in the blue color resist is larger than the area of ​​the opening in the green color resist.

12. The display panel according to claim 8, wherein, The color resists include red, green, and blue color resists. Each color resist opening has the same area. The red color resist has one color resist opening, the green color resist has one color resist opening, and the blue color resist has two color resist openings.

13. The display panel according to claim 12, wherein, The opening within the red color resist divides the red color resist into a first red sub-color resist and a second red sub-color resist, and the areas of the first red sub-color resist and the second red sub-color resist are equal. The opening within the green color resist divides the green color resist into a first green sub-color resist and a second green sub-color resist, the areas of the first green sub-color resist and the second green sub-color resist being equal; The opening within the blue color resist divides the blue color resist into a first blue sub-color resist, a second blue sub-color resist, and a third blue sub-color resist. The areas of the first blue sub-color resist, the second blue sub-color resist, and the third blue sub-color resist are all equal.

14. The display panel according to claim 9, wherein, The first substrate also has a strip-shaped groove at the position corresponding to the color resist opening, and the orthographic projection of the strip-shaped groove also covers the color resist opening. The inner surface of the strip-shaped groove is an arc surface, and the width direction of the color resist gap is the first direction. The cross section of the strip-shaped groove in the first direction is arc-shaped.

15. The display panel according to claim 9, wherein, The color resist includes red, green, blue, and white color resists, which are arranged alternately.

16. A method for manufacturing a display panel, wherein, The method for preparing a display panel as described in any one of claims 1-15 includes the following steps: Photoresist is applied to one side of the first substrate, and a photoresist pattern is formed. A strip-shaped trench is formed at a location on the first substrate where no photoresist is applied, and the strip-shaped trench corresponds to the color resist gap between two adjacent color resists.

17. The method for manufacturing a display panel according to claim 16, wherein, After the step of forming strip-shaped trenches at locations where no photoresist is applied to the first substrate, wherein the strip-shaped trenches correspond to the color resist gap positions between two adjacent color resists, the method further includes: A groove is formed on one side of the first substrate where a strip trench is formed, and the groove corresponds to the center position of every four color resists arranged in a grid pattern. The depth of the groove is greater than the depth of the strip trench.

18. The method for manufacturing a display panel according to claim 16, wherein, After the step of forming strip-shaped trenches at locations where no photoresist is applied to the first substrate, wherein the strip-shaped trenches correspond to the color resist gap positions between two adjacent color resists, the method further includes: After the step of forming strip-shaped trenches at locations where no photoresist is applied to the first substrate, wherein the strip-shaped trenches correspond to the color resist gap positions between two adjacent color resists, the method further includes: A color resist is disposed on one side of the strip-shaped trench on the first substrate; A transparent protective layer is provided on the side of the color resist that is away from the first substrate; A transparent insulating layer is provided on the side of the transparent protective layer that faces away from the first substrate; A common electrode is disposed on the side of the transparent insulating layer opposite to the first substrate; The electronic paper layer and the array substrate are sequentially attached to the side of the transparent insulating layer that is away from the first substrate.

19. The method for manufacturing a display panel according to claim 16, wherein, Strip-shaped trenches are formed on the first substrate, and the first substrate with photoresist can be etched by using strong acid or strong alkali.

20. A display device, wherein, The display device includes a driving circuit and a display panel as described in any one of claims 1-15, wherein the driving circuit drives the display panel to display.

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