Reflective display panel, display device and driving method thereof

Abstract

The invention discloses a reflective display panel, a display device and a driving method thereof, the reflective display panel comprises an opposed substrate, an array substrate and a liquid crystal layer, the opposed substrate is located on the side, close to the external environment, of the liquid crystal layer, and the array substrate is located on the side, away from the external environment, of the liquid crystal layer; a pixel electrode and a reflecting layer are arranged on the array substrate, and the reflecting layer is used for reflecting incident ambient light; a public electrode, a circular polarizer and a light scattering structure are arranged on the opposite substrate, the public electrode is matched with the pixel electrode, the circular polarizer is used for converting incident ambient light into circularly polarized light, and the light scattering structure is arranged on the side, close to the external environment, of the opposite substrate and used for scattering reflected light reflected by the reflecting layer. The circular polaroid is arranged on the opposite substrate, so that the liquid crystal layer and the circular polaroid are matched with each other, and the brightness of reflected light can be controlled; and the light scattering structures are arranged on the opposite substrates, so that alignment and rotation of liquid crystal molecules are prevented from being influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and particularly to a reflective display panel, a display device and a driving method thereof. Background Art

[0002] Display panels have the advantages of being thin, light, durable, energy-saving and environment-friendly with low power consumption. However, they need to be used with a backlight, resulting in a thick module, high cost and high power consumption. Electronic paper displays (reflective displays) have become a type of display that meets the needs of the public. Electronic paper displays can use external light sources to display images, unlike liquid crystal displays that require a backlight. Therefore, in an outdoor environment with strong sunlight, the information on the electronic paper can still be clearly seen without the problem of viewing angles. Moreover, due to their advantages such as power saving, high reflectivity and contrast ratio, electronic paper displays are now widely used in e-readers (such as e-books, e-newspapers) or other electronic components (such as price tags).

[0003] Existing electronic paper displays usually adopt E-Ink microcapsule technology (microcapsule electronic ink technology), SiPix microcup technology (microcup electrophoretic display technology), Bridgestone electronic liquid powder technology, cholesteric liquid crystal display (CLCD) technology, microelectromechanical system (MEMS) technology or electrowetting technology. However, the existing electronic paper display technology is not as mature as liquid crystal display technology, with low mass production efficiency and relatively high manufacturing costs.

[0004] In order to achieve a better reflection effect, existing reflective display panels usually add a convex structure layer and a reflective layer on the side of the substrate facing the liquid crystal layer, and cover the reflective layer on the convex structure layer so that the reflective layer also forms a convexity, thereby achieving a diffuse reflection effect for easy viewing by users. However, the uneven surface of the reflective layer will affect alignment and the rotation of liquid crystal molecules, affecting the display effect. Summary of the Invention

[0005] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide a reflective display panel, a display device and a driving method thereof, so as to solve the problem that adding a convex structure layer on the side of the substrate of the existing reflective display panel facing the liquid crystal layer will affect alignment and the rotation of liquid crystal molecules, thus affecting the display effect.

[0006] The purpose of the present invention is achieved by the following technical solutions: The present invention provides a reflective display panel, which includes a counter substrate, an array substrate disposed opposite to the counter substrate, and a liquid crystal layer located between the counter substrate and the array substrate. The counter substrate is on the side of the liquid crystal layer close to the external environment, and the array substrate is on the side of the liquid crystal layer away from the external environment; The array substrate is provided with pixel electrodes and a reflective layer, and the reflective layer is used to reflect incident ambient light; the counter substrate is provided with a common electrode, a circular polarizer, and a light scattering structure. The common electrode cooperates with the pixel electrodes. The circular polarizer is used to convert incident ambient light into circularly polarized light, and the light scattering structure is disposed on the side of the counter substrate close to the external environment and is used to scatter the reflected light reflected by the reflective layer.

[0007] Further, the light scattering structure includes a scattering film, and a plurality of light-scattering particles are provided in the scattering film.

[0008] Further, the light scattering structure includes a raised structure layer, and a plurality of raised structures are provided on the surface of the raised structure layer.

[0009] Further, a planarization layer is provided on the counter substrate. The planarization layer is disposed on the surface of the raised structure layer and covers the raised structures, and the refractive index of the planarization layer is not equal to the refractive index of the raised structure layer.

[0010] Further, the light scattering structure includes a plurality of raised structures, and the raised structures are directly disposed on the surface of the counter substrate.

[0011] Further, a planarization layer is provided on the counter substrate. The planarization layer is disposed on the surface of the counter substrate and covers the raised structures, and the refractive index of the planarization layer is not equal to the refractive index of the counter substrate.

[0012] Further, the circular polarizer includes a linear polarizer and a quarter-wave plate. The linear polarizer is disposed on the side of the quarter-wave plate close to the external environment, and the transmission axis of the linear polarizer forms a 45° angle with the fast and slow axes of the quarter-wave plate.

[0013] Further, the liquid crystal layer is aligned parallel to the counter substrate and the array substrate, and the alignment direction of the liquid crystal layer on the side close to the counter substrate is perpendicular to the alignment direction of the side close to the array substrate.

[0014] The present application also provides a display device, which includes the reflective display panel as described above.

[0015] The present application also provides a driving method for a reflective display panel, which is used to drive the reflective display panel as described above. The driving method includes: In the dark state, the liquid crystal molecules in the liquid crystal layer are controlled to be in a standing posture; In the bright state, the liquid crystal molecules in the liquid crystal layer are controlled to be in a lying posture and have a phase delay of λ / 4.

[0016] The beneficial effects of the present invention are as follows: By providing a circular polarizer on the counter substrate, the liquid crystal layer and the circular polarizer can cooperate with each other to control the brightness of the reflected light, so as to realize the display of the picture by using the reflected ambient light; moreover, the light scattering structure is provided on the counter substrate, thus avoiding affecting the alignment and the rotation of the liquid crystal molecules, and also making the reflected light seen by the user softer, reducing the irritation to the user's eyes, improving the display quality and enhancing the eye protection effect. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 1 of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the array substrate in Embodiment 1 of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the counter substrate in Embodiment 1 of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the reflective display panel in the bright state in Embodiment 1 of the present invention.

[0021] Figure 5 It is a schematic principle diagram of the reflective display panel in the bright state in Embodiment 1 of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the reflective display panel in the dark state in Embodiment 1 of the present invention.

[0023] Figure 7 It is a schematic principle diagram of the reflective display panel in the dark state in Embodiment 1 of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 2 of the present invention.

[0025] Figure 9 It is a schematic structural diagram of the reflective display panel in the bright state in Embodiment 2 of the present invention.

[0026] Figure 10 It is a schematic structural diagram of the reflective display panel in the dark state in Embodiment 2 of the present invention.

[0027] Figure 11 It is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 3 of the present invention.

[0028] Figure 12 It is a schematic structural diagram of the reflective display panel in the initial state in the fourth embodiment of the present invention.

[0029] Figure 13 It is a schematic structural diagram of the reflective display panel in the initial state in the fifth embodiment of the present invention.

[0030] Figures 14 - 18 It is a schematic structural diagram of the manufacturing process of the light scattering structure in the fifth embodiment of the present invention.

[0031] Figure 19 It is a schematic structural diagram of the reflective display panel in the initial state in the sixth embodiment of the present invention. Detailed implementation manners

[0032] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manners, structures, features and effects of the reflective display panel, display device and its driving method proposed according to the present invention as follows: [Embodiment 1] Figure 1 It is a schematic structural diagram of the reflective display panel in the initial state in the first embodiment of the present invention. Figure 2 It is a schematic structural diagram of the array substrate in the first embodiment of the present invention. Figure 3 It is a schematic structural diagram of the counter substrate in the first embodiment of the present invention.

[0033] As Figures 1 to 3 shown, a reflective display panel provided in the first embodiment of the present invention includes a counter substrate 10, an array substrate 20 disposed opposite to the counter substrate 10, and a liquid crystal layer 30 located between the counter substrate 10 and the array substrate 20. The counter substrate 10 is located on the side of the liquid crystal layer 30 close to the external environment, and the array substrate 20 is located on the side of the liquid crystal layer 30 far from the external environment.

[0034] The array substrate 20 is provided with a pixel electrode 21 and a reflective layer 22. The reflective layer 22 is used to reflect the incident ambient light. In this embodiment, the reflective layer 22 is located on the side of the array substrate 20 facing the liquid crystal layer 30, so as to protect the reflective layer 22 and prevent the damage of the reflective layer 22 from affecting the reflection effect.

[0035] On the counter substrate 10, a common electrode 13, a circular polarizer 14, and a light scattering structure 15 are provided. The common electrode 13 cooperates with the pixel electrode 21. The circular polarizer 14 is used to convert the incident ambient light into circularly polarized light. The light scattering structure 15 is disposed on the side of the counter substrate 10 close to the external environment and is used to scatter the reflected light reflected by the reflective layer 22. Among them, the pixel electrode 21 is a block structure, and a plurality of pixel electrodes 21 are arranged in an array on the array substrate 20; the common electrode 13 is a planar structure that entirely covers the counter substrate 10; the reflective layer 22 is a planar structure that entirely covers the array substrate 20, and is located on a different layer from the pixel electrode 21 and is insulated and spaced apart from each other.

[0036] In this application, by providing the circular polarizer 14 on the counter substrate 10, the liquid crystal layer 30 and the circular polarizer 14 can cooperate with each other to control the brightness of the reflected light, so as to use the reflected ambient light to realize the display of the picture; moreover, the light scattering structure 15 is disposed on the side of the counter substrate 10 close to the external environment, so as to avoid affecting the alignment and the rotation of liquid crystal molecules, and can also make the reflected light seen by the user softer, reduce the stimulation to the user's eyes, improve the display quality, and enhance the eye protection effect.

[0037] In this embodiment, the liquid crystal molecules in the liquid crystal layer 30 are positive liquid crystal molecules. As Figure 1 shown, in the initial state, the liquid crystal layer 30 is aligned parallel to the counter substrate 10 and the array substrate 20. The alignment direction of the side of the liquid crystal layer 30 close to the counter substrate 10 is perpendicular to the alignment direction of the side close to the array substrate 20, that is, the liquid crystal molecules in the liquid crystal layer 30 are in a 90° twisted state from top to bottom to form a TN display mode. It can be understood that a first alignment layer is provided on the side of the counter substrate 10 facing the liquid crystal layer 30, and a second alignment layer is provided on the side of the array substrate 20 facing the liquid crystal layer 30. The first alignment layer and the second alignment layer are used to align the liquid crystal layer 30, and the first alignment layer and the second alignment layer are perpendicular to each other. Of course, in other embodiments, the liquid crystal layer 30 can also be aligned perpendicular to the counter substrate 10 and the array substrate 20 to form a VA display mode.

[0038] Optionally, the circular polarizer 14 includes a linear polarizer and a quarter-wave plate. The linear polarizer is disposed on the side of the quarter-wave plate close to the external environment. The transmission axis of the linear polarizer forms a 45° angle with the fast and slow axes of the quarter-wave plate. The external ambient light passes through the linear polarizer and becomes linearly polarized light, and then passes through the quarter-wave plate and becomes circularly polarized light.

[0039] In this embodiment, the light scattering structure 15 includes a scattering film, and a plurality of light scattering particles 151 are provided in the scattering film. Among them, nano-scale transparent haze particles (i.e., light scattering particles 151) exist inside the scattering film. When ambient light enters the liquid crystal layer 30 and is reflected by the reflection layer 22, the light passing through the scattering film will be scattered, improving the display effect of the picture. Since the light scattering structure 15 is provided on the side of the counter substrate 10 close to the external environment, it will not affect the liquid crystal alignment and the rotation of liquid crystal molecules, avoiding the occurrence of non-uniform black and white mura, nor will it affect the display of the liquid crystal. In addition, it can also save the raised structure layer and a photomask. The light scattering particles 151 can be haze particles or high refractive index material particles, and the particles can be uniformly mixed in a glue-like substance to form a scattering film. The particle size range is preferably 10 nm to 500 nm.

[0040] Optionally, the light scattering structure 15 can be disposed between the circularly polarized light sheet 14 and the counter substrate 10. The circularly polarized light sheet 14 can play a certain protective role for the light scattering structure 15, avoiding damage to the light scattering structure 15 and affecting the scattering effect.

[0041] In this embodiment, as Figure 1 and Figure 3 shown, color filters 12 arranged in an array and black matrices 11 separating the color filters 12 are provided on the counter substrate 10. The color filters 12 include color filter materials of three colors: red (R), green (G), and blue (B), and sub-pixels of three colors: red (R), green (G), and blue (B) are correspondingly formed. That is, in this embodiment, the counter substrate 10 is a color filter substrate.

[0042] As Figure 2 shown, on the side of the array substrate 22 facing the liquid crystal layer 30, a plurality of pixel units P are defined by a plurality of scanning lines and a plurality of data lines insulatingly intersecting each other. A pixel electrode 21 and a thin film transistor are provided in each pixel unit P. The pixel electrode 21 is electrically connected to the data line adjacent to the thin film transistor through the thin film transistor. Among them, the thin film transistor includes a gate, an active layer, a drain, and a source. The gate and the scanning line are on the same layer and electrically connected. The gate and the active layer are separated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 21 through a contact hole.

[0043] Among them, the counter substrate 10 and the array substrate 20 can be made of materials such as glass, acrylic, and polycarbonate. The materials of the common electrode 13 and the pixel electrode 21 can be indium tin oxide (ITO) or indium zinc oxide (IZO), etc. The material of the reflection layer 22 can be made of a metal with a relatively high reflectivity, such as aluminum or silver.

[0044] In this embodiment, a display device is further provided, including the reflective display panel described above.

[0045] In this embodiment, a driving method for a reflective display panel is also provided, which is used to drive the reflective display panel as described above. The driving method includes: Figure 4 It is a schematic structural diagram of the reflective display panel in the bright state in Embodiment 1 of the present invention. Figure 5 It is a schematic principle diagram of the reflective display panel in the bright state in Embodiment 1 of the present invention. As Figure 4 shown, in the bright state, the liquid crystal molecules in the liquid crystal layer 30 are controlled to be in a lying posture and have a phase delay of λ / 4. Specifically, since the alignment direction of the liquid crystal layer 30 close to the counter substrate 10 is perpendicular to the alignment direction close to the array substrate 20, that is, the liquid crystal layer 30 has a phase delay of λ / 4 in the initial state, the reflective display panel is in a constant bright state. A common voltage signal is applied to the common electrode 13, and a grayscale voltage signal with the same amplitude as the common voltage signal is applied to the pixel electrode 21, so that no vertical electric field or a smaller vertical electric field is formed between the pixel electrode 21 and the common electrode 13, and the liquid crystal layer 30 maintains its initial state. As Figure 5 shown, the external ambient light passes through the circular polarizer 14 and becomes circularly polarized light (left-handed), then becomes linearly polarized light after passing through the liquid crystal layer 30, and then is reflected back by the reflective layer 22, becomes circularly polarized light (left-handed) after passing through the liquid crystal layer 30, and finally becomes linearly polarized light after passing through the circular polarizer 14 and is emitted from the circular polarizer 14 to achieve the bright state.

[0046] Figure 6 It is a schematic structural diagram of the reflective display panel in the dark state in Embodiment 1 of the present invention. Figure 7 It is a schematic principle diagram of the reflective display panel in the dark state in Embodiment 1 of the present invention. As Figure 6 shown, in the dark state, the liquid crystal molecules in the liquid crystal layer 30 are controlled to be in a standing posture. Specifically, a common voltage signal is applied to the common electrode 13, and a dark-state grayscale voltage signal with a large difference in amplitude from the common voltage signal is applied to the pixel electrode 21, so that a strong vertical electric field is formed between the pixel electrode 21 and the common electrode 13, and the liquid crystal molecules in the liquid crystal layer 30 are greatly deflected in the vertical direction and perpendicular to the counter substrate 10 and the array substrate 20. At this time, the liquid crystal layer 30 has basically no phase delay for light. As Figure 7 shown, the external ambient light passes through the circular polarizer 14 and becomes circularly polarized light (left-handed), then remains unchanged after passing through the liquid crystal layer 30, and then is reflected back by the reflective layer 22 as circularly polarized light (right-handed) with the opposite rotation direction, remains unchanged after passing through the liquid crystal layer 30, and due to the opposite rotation direction, finally cannot pass through the circular polarizer 14 when passing through the circular polarizer 14, achieving the dark state.

[0047] [Embodiment 2] Figure 8 It is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 2 of the present invention.Figure 9 It is a schematic structural diagram of the reflective display panel in the bright state in the second embodiment of the present invention. Figure 10 It is a schematic structural diagram of the reflective display panel in the dark state in the second embodiment of the present invention. As Figures 8 to 10 shown, the reflective display panel, display device and driving method provided in the second embodiment of the present invention are basically the same as those in the first embodiment ( Figures 1 to 7 ), and the difference is that: In this embodiment, the light scattering structure 15 includes a convex structure layer, and the surface of the convex structure layer is provided with a plurality of convex structures 152. That is, in this embodiment, the convex structure layer is used to replace the scattering film in the first embodiment. Of course, in other embodiments, the light scattering structure 15 may also be composed of a scattering film and a convex structure layer stacked on each other to improve the scattering effect. Among them, an uneven pattern can be directly made on the glass by chemical etching to form the convex structure layer. The reflected light passing through the convex structure layer can make the picture more uniform. The size of the convex structure 152 is 10nm - 500nm. The finer the concave and convex shape on the convex structure layer (more particles, smaller step difference), the better the picture display effect.

[0048] Optionally, among the plurality of convex structures 152, there are convexes with various sizes, so as to increase the diffuse reflection effect.

[0049] In this embodiment, since the light scattering structure 15 adopts a convex structure layer and its surface is an uneven structure, the circular polarizer 14 is disposed between the light scattering structure 15 and the counter substrate 10, and the convex structure 152 is disposed on the side of the convex structure layer away from the circular polarizer 14.

[0050] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those in the first embodiment, and will not be described in detail here.

[0051] [Embodiment Three] Figure 11 It is a schematic structural diagram of the reflective display panel in the initial state in the third embodiment of the present invention. As Figure 11 shown, the reflective display panel, display device and driving method provided in the third embodiment of the present invention are basically the same as those in the second embodiment ( Figures 8 to 10 ), and the difference is that: In this embodiment, a flat layer 16 is provided on the counter substrate 10. The flat layer 16 is disposed on the surface of the convex structure layer and covers the convex structure 152, and the refractive index of the flat layer 16 is not equal to that of the convex structure layer. Optionally, the refractive index of the flat layer 16 is less than that of the convex structure layer. By covering the surface of the convex structure layer with the flat layer 16 having a different refractive index, not only can the surface of the convex structure layer be made flatter, but also the scattering effect can be further improved.

[0052] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 2, and will not be described in detail here.

[0053] [Embodiment 4] Figure 12 is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 4 of the present invention. As Figure 12 shown, the reflective display panel, display device and their driving methods provided in Embodiment 4 of the present invention are basically the same as those of the reflective display panel, display device and their driving methods in Embodiment 3 ( Figure 11 ), the difference being that: In this embodiment, since the surface of the convex structure layer is provided with a flat layer 16 covering the convex structure 152, the surface of the convex structure layer is made flatter. Therefore, the light scattering structure 15 and the flat layer 16 can be disposed between the circular polarizer 14 and the counter substrate 10 to protect the convex structure layer and the flat layer 16.

[0054] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 3, and will not be described in detail here.

[0055] [Embodiment 5] Figure 13 is a schematic structural diagram of the reflective display panel in the initial state in Embodiment 5 of the present invention. As Figure 13 shown, the reflective display panel, display device and their driving methods provided in Embodiment 5 of the present invention are basically the same as those of the reflective display panel, display device and their driving methods in Embodiment 1 ( Figures 1 to 7 ), the difference being that: In this embodiment, the light-scattering structure 15 includes a plurality of convex structures 152, and the convex structures 152 are directly disposed on the surface of the counter substrate 10. Among them, the nano-scale particles can be evenly sprayed onto the surface of the glass (counter substrate 10) by using a fine spraying technique to form uneven convex structures 152, which can scatter the reflected light and improve the display effect of the picture. Of course, uneven patterns can also be directly fabricated on the glass (counter substrate 10) by using a chemical etching method to fabricate the convex structures 152. The reflected light passing through the convex structures 152 can make the display picture more uniform, enabling the counter substrate 10 to be reused as the light-scattering structure 15 to reduce one glass substrate.

[0056] Further, a flat layer 16 is provided on the counter substrate 10. The flat layer 16 is disposed on the surface of the counter substrate 10 and covers the convex structures 152. The refractive index of the flat layer 16 is not equal to the refractive index of the counter substrate 10. For example, the refractive index of the convex structures 152 is less than the refractive index of the flat layer 16, and the refractive index difference between the convex structures 152 and the flat layer 16 is Δn, where 0.15 ≤ Δn ≤ 0.4.

[0057] Figures 14 - 18 It is a schematic structural diagram of the manufacturing process of the light-scattering structure in the fifth embodiment of the present invention. Taking the example of directly fabricating uneven convex structures 152 on the glass (counter substrate 10) by using a chemical etching method, the manufacturing method of the light-scattering structure 15 is as follows: As Figure 14 shown, a photoresist layer 1 is covered on the counter substrate 10 (glass); As Figure 15 shown, using a patterned mask plate 2 as a shield, the photoresist layer 1 is exposed, and then the photoresist layer 1 is developed to remove part of the photoresist material, so that the photoresist layer 1 forms a patterned structure; As Figure 16 shown, using the patterned photoresist layer 1 as a shield, the counter substrate 10 (glass) is etched by using a chemical etching method to form uneven convex structures 152; As Figure 17 and Figure 18 shown, then the photoresist layer 1 is peeled off, and a flat layer 16 is covered on the counter substrate 10 (glass).

[0058] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and will not be elaborated here.

[0059] [Embodiment Six] Figure 19 It is a schematic structural diagram of the reflective display panel in the initial state in the sixth embodiment of the present invention. As Figure 19As shown, the reflective display panel, display device and their driving method provided in the sixth embodiment of the present invention are basically the same as those in the first embodiment ( Figures 1 to 7 ), the second embodiment ( Figures 8 to 10 ), the third embodiment ( Figure 11 ), the fourth embodiment ( Figure 12 ), the fifth embodiment ( Figure 13 ). The difference is that: In this embodiment, the pixel electrode 21 is a reflective electrode, and the pixel electrode 21 is made of a metal with a relatively high reflectivity, such as aluminum or silver. The pixel electrode 21 is reused as the reflective layer 22, so that the manufacturing process of the array substrate 20 can be simplified and the manufacturing cost can be reduced.

[0060] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment, and will not be described in detail here.

[0061] In this article, the orientation words such as up, down, left, right, front, and back are defined based on the position of the structure in the figure and the position of the structures relative to each other in the figure, only for the sake of clarity and convenience of expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of protection requested by this application. It should also be understood that the terms "first" and "second" used in this article are only for distinction in name and do not limit the quantity and order.

[0062] The above is only a preferred embodiment of the present invention, and does not make any form of limitation to the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications using the above-disclosed technical content within the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A reflective display panel, characterized in that, It includes a counter substrate (10), an array substrate (20) disposed opposite to the counter substrate (10), and a liquid crystal layer (30) located between the counter substrate (10) and the array substrate (20). The counter substrate (10) is on the side of the liquid crystal layer (30) close to the external environment, and the array substrate (20) is on the side of the liquid crystal layer (30) away from the external environment; A pixel electrode (21) and a reflective layer (22) are provided on the array substrate (20), and the reflective layer (22) is used to reflect incident ambient light; a common electrode (13), a circular polarizer (14), and a light scattering structure (15) are provided on the counter substrate (10). The common electrode (13) cooperates with the pixel electrode (21). The circular polarizer (14) is used to convert incident ambient light into circularly polarized light, and the light scattering structure (15) is provided on the side of the counter substrate (10) close to the external environment and is used to scatter the reflected light reflected by the reflective layer (22).

2. The reflective display panel according to claim 1, wherein The light scattering structure (15) includes a scattering film, and a plurality of light scattering particles (151) are provided in the scattering film.

3. The reflective display panel according to claim 1, wherein The light scattering structure (15) includes a raised structure layer, and a plurality of raised structures (152) are provided on the surface of the raised structure layer.

4. The reflective display panel according to claim 3, wherein A planarization layer (16) is provided on the counter substrate (10). The planarization layer (16) is provided on the surface of the raised structure layer and covers the raised structures (152). The refractive index of the planarization layer (16) is not equal to the refractive index of the raised structure layer.

5. The reflective display panel according to claim 1, characterized in that, The light scattering structure (15) includes a plurality of raised structures (152), and the raised structures (152) are directly provided on the surface of the counter substrate (10).

6. The reflective display panel according to claim 5, characterized in that, A planarization layer (16) is provided on the counter substrate (10). The planarization layer (16) is provided on the surface of the counter substrate (10) and covers the raised structures (152). The refractive index of the planarization layer (16) is not equal to the refractive index of the counter substrate (10).

7. The reflective display panel according to claim 1, wherein The circular polarizer (14) includes a linear polarizer and a quarter-wave plate. The linear polarizer is on the side of the quarter-wave plate close to the external environment, and the transmission axis of the linear polarizer forms a 45° angle with the fast and slow axes of the quarter-wave plate.

8. The reflective display panel according to claim 1, wherein The liquid crystal layer (30) is aligned parallel to the counter substrate (10) and the array substrate (20), and the alignment direction of the liquid crystal layer (30) on the side close to the counter substrate (10) is perpendicular to the alignment direction on the side close to the array substrate (20).

9. A display device, characterized in that, It includes a reflective display panel according to any one of claims 1-8.

10. A driving method for a reflective display panel, characterized in that, For driving a reflective display panel according to any one of claims 1-8, the driving method includes: In the dark state, controlling the liquid crystal molecules in the liquid crystal layer (30) to be in a standing posture; In the bright state, controlling the liquid crystal molecules in the liquid crystal layer (30) to be in a lying posture and having a phase delay of λ / 4.

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