Reflective display panel and display device

Abstract

The reflective display panel comprises a cover plate, a touch structure layer, a liquid crystal box and an auxiliary light source, the touch structure layer is located on one side of the cover plate, the liquid crystal box is located on the side, away from the cover plate, of the touch structure layer, and the auxiliary light source is located on the cover plate or the touch structure layer. And a light guide structure is arranged on the cover plate or the touch structure layer. According to the technical scheme provided by the embodiment of the utility model, the auxiliary light source is arranged on the cover plate or the touch structure layer, and the light rays emitted by the auxiliary light source are guided into the liquid crystal box through the cover plate or the touch structure layer by the light guide structure on the cover plate or the touch structure layer, so that an additional light guide plate is not needed; the thickness of the reflective display panel is reduced, so that the panel is light and thin.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a reflective display panel and a display device. Background Art

[0002] Reflective display panels are widely used in e-readers or other electronic components (such as price tags) due to their advantages such as low power consumption and eye-friendliness.

[0003] Existing reflective display panels usually use additional light sources to supplement the ambient light when the brightness is insufficient. The light source guides light into the panel through a light guide plate. However, this structure is relatively complex, resulting in a thicker overall panel, which is not conducive to the thinness of the product. Utility Model Content

[0004] Embodiments of the present invention provide a reflective display panel and a display device to reduce the thickness of the panel.

[0005] According to one aspect of the present invention, a reflective display panel is provided, comprising:

[0006] cover;

[0007] A touch structure layer, the touch structure layer being located on one side of the cover plate;

[0008] a liquid crystal box, the liquid crystal box being located on a side of the touch structure layer away from the cover plate;

[0009] An auxiliary light source is located on a side of the cover plate or the touch structure layer, and a light guide structure is provided on the cover plate or the touch structure layer.

[0010] Optionally, the touch structure layer includes a touch substrate, a touch electrode layer, and a second flexible circuit board, the touch electrode layer is located on a side of the touch substrate away from the liquid crystal cell, the second flexible circuit board is bound and connected to the touch substrate, and the touch electrode layer is connected to the second flexible circuit board;

[0011] The auxiliary light source is located on a side surface of the touch substrate, and the auxiliary light source is connected to the second flexible circuit board.

[0012] Optionally, there are multiple auxiliary light sources, and the positive electrodes of the multiple auxiliary light sources are connected in series and then connected to the positive end of the second flexible circuit board, and the negative electrodes of the multiple auxiliary light sources are connected in series and then connected to the negative end of the second flexible circuit board;

[0013] The auxiliary light source and the second flexible circuit board are located on two opposite sides of the touch substrate.

[0014] Optionally, the light guide structure includes light guide dots, and the light guide dots are located on a surface of the touch substrate close to the cover plate, so that the light emitted by the auxiliary light source is reflected to the liquid crystal box.

[0015] Optionally, the auxiliary light source is located on a side surface of the cover plate, the light guide structure includes light guide points, and the light guide points are located on a surface of the cover plate away from the touch structure layer, so that light emitted by the auxiliary light source is reflected to the liquid crystal box;

[0016] The reflective display panel further includes a first flexible circuit board, and the auxiliary light source is connected to the first flexible circuit board.

[0017] Optionally, the touch structure layer is bonded to the cover plate and the liquid crystal box via a first adhesive layer and a second adhesive layer respectively, and the first flexible circuit board is bonded to a surface of the cover plate close to the touch structure layer via the first adhesive layer;

[0018] The auxiliary light source and the first flexible circuit board are located on the same side of the cover plate. On the side where the first flexible circuit board is provided, the orthographic projection of the first adhesive layer on the cover plate covers the orthographic projection of the touch structure layer on the cover plate.

[0019] Optionally, the liquid crystal cell includes a first substrate, a liquid crystal layer, and a second substrate, the liquid crystal layer being located between the first substrate and the second substrate, a common electrode being provided on a side of the first substrate close to the liquid crystal layer, and a pixel electrode being provided on a side of the second substrate close to the liquid crystal layer, the plurality of pixel electrodes being insulated from each other, and a pixel region being formed where an orthographic projection of each pixel electrode and the common electrode overlaps on the second substrate;

[0020] The second substrate is located on a side of the first substrate away from the touch structure layer.

[0021] Optionally, the liquid crystal layer is a cholesteric liquid crystal layer;

[0022] An absorption layer is provided on a side of the second substrate away from the liquid crystal layer, and the absorption layer is used to absorb light passing through the cholesteric liquid crystal layer.

[0023] Optionally, the liquid crystal layer is a dye liquid crystal layer;

[0024] A reflective layer is provided on a side of the second substrate away from the liquid crystal layer, wherein the reflective layer is used to reflect light passing through the dye liquid crystal layer;

[0025] The liquid crystal box further comprises a color filter substrate, which is located between the first substrate and the common electrode. Color resist layers of different colors are arranged at intervals on the color filter substrate, and each pixel area is correspondingly provided with a color resist layer of the same color.

[0026] According to another aspect of the present invention, a display device is provided, comprising the reflective display panel provided by any embodiment of the present invention.

[0027] The technical solution provided by the embodiment of the present invention is to set an auxiliary light source on the cover plate or the touch structure layer, and guide the light emitted by the auxiliary light source into the liquid crystal box through the light guide structure on the cover plate or the touch structure layer. There is no need to set up an additional light guide plate, which is beneficial to reducing the thickness of the reflective display panel, thereby achieving a lighter and thinner panel.

[0028] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of a reflective display panel provided by an embodiment of the present utility model;

[0031] Figure 2 A schematic structural diagram of another reflective display panel provided by an embodiment of the present utility model;

[0032] Figure 3 A schematic structural diagram of another reflective display panel provided by an embodiment of the present utility model;

[0033] Figure 4 A schematic structural diagram of another reflective display panel provided by an embodiment of the present utility model;

[0034] Figure 5 A schematic diagram of the optical path of a reflective display panel provided in an embodiment of the present utility model;

[0035] Figure 6 A schematic diagram of the optical path of another reflective display panel provided by an embodiment of the present utility model;

[0036] Figure 7 A schematic diagram of the optical path of another reflective display panel provided by an embodiment of the present utility model;

[0037] Figure 8 A schematic diagram of the optical path of a reflective display panel provided in an embodiment of the present utility model;

[0038] Figure 9 A schematic diagram of the optical path of another reflective display panel provided by an embodiment of the present utility model;

[0039] Figure 10 A schematic diagram of the optical path of another reflective display panel provided by an embodiment of the present utility model;

[0040] Figure 11 A schematic structural diagram of another reflective display panel provided by an embodiment of the present utility model;

[0041] Figure 12 A schematic structural diagram of another reflective display panel provided by an embodiment of the present utility model;

[0042] Among them, 10-cover plate;

[0043] 20 - touch structure layer; 201 - touch substrate; 202 - touch electrode layer; 2021 - first touch electrode; 2022 - second touch electrode;

[0044] 30 - liquid crystal cell; 301 - first substrate; 302 - second substrate; 303 - liquid crystal layer; 304 - common electrode; 305 - pixel electrode; 306 - absorption layer; 307 - color filter substrate; 308 - reflective layer;

[0045] 40- auxiliary light source; 401- positive electrode connecting wire; 402- negative electrode connecting wire;

[0046] 50-first flexible circuit board; 51-second flexible circuit board;

[0047] 60-light guide network point; 61-light guide structure;

[0048] 71-first adhesive layer; 72-second adhesive layer; 80-explosion-proof membrane. DETAILED DESCRIPTION

[0049] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] Figure 1 A schematic diagram of a reflective display panel according to an embodiment of the present invention is provided. Figure 1 The reflective display panel includes: a cover plate 10; a touch structure layer 20, the touch structure layer 20 is located on one side of the cover plate 10; a liquid crystal box 30, the liquid crystal box 30 is located on the side of the touch structure layer 20 away from the cover plate 10; an auxiliary light source 40, the auxiliary light source 40 is located on the side of the cover plate 10 or the touch structure layer 20, and a light guide structure 61 is provided on the cover plate 10 or the touch structure layer 20.

[0052] Specifically, a reflective display panel uses the principle of reflection to display images. Ambient light is reflected by the internal structure of the display, returning it to the human eye, thus forming an image. From top to bottom, the reflective display panel comprises a cover plate 10, a touch structure layer 20, and a liquid crystal cell. Therefore, the surface of the cover plate 10 on the side of the touch structure layer 20 facing away from the liquid crystal cell 30 is the surface facing the ambient light. In other words, the top surface of the cover plate 10 faces the ambient light, while the bottom surface faces the side facing away from the ambient light.

[0053] The auxiliary light source 40 can be disposed on the cover plate 10 or the touch structure layer 20. Light emitted by the auxiliary light source 40 is guided into the liquid crystal cell 30 via the light guide structure 61 on the cover plate 10 or the touch structure layer 20. The auxiliary light source 40 can serve as a supplementary light source for the reflective display panel when the intensity of ambient light is low. The auxiliary light source 40 can be an LED.

[0054] The technical solution provided by the embodiment of the present invention is to set the auxiliary light source 40 on the cover plate 10 or the touch structure layer 20, and guide the light emitted by the auxiliary light source 40 into the liquid crystal box 30 through the light guide structure 61 on the cover plate 10 or the touch structure layer 20, without the need for an additional light guide plate, which is beneficial to reducing the thickness of the reflective display panel, thereby achieving a lighter and thinner panel.

[0055] In an optional implementation provided in this embodiment, the auxiliary light source 40 is disposed on the touch structure layer 20 . Figure 2 This is a schematic diagram of the structure of another reflective display panel provided by an embodiment of the present invention, and specifically shows the structure of the touch structure layer 20. Figure 1 and Figure 2 Based on the above embodiment, optionally, the touch structure layer 20 includes a touch substrate 201, a touch electrode layer 202, and a second flexible circuit board 51. The touch electrode layer 202 is located on a side of the touch substrate 201 away from the liquid crystal cell 30. The second flexible circuit board 51 is bound and connected to the touch substrate 201, and the touch electrode layer 202 is connected to the second flexible circuit board 51. The auxiliary light source 40 is located on a side surface of the touch substrate 201 and is connected to the second flexible circuit board 51. The second flexible circuit board 51 is used to provide an operating voltage for the auxiliary light source 40.

[0056] Specifically, the touch substrate 201 can be a glass substrate, and a touch electrode layer 202 is provided on the touch substrate 201, wherein the touch electrode layer 202 can include a first touch electrode 2021 and a second touch electrode 2022, the first touch electrode 2021 is a mesh structure, and the second touch electrode 2022 is also a mesh structure. The first touch electrode 2021 and the second touch electrode 2022 are respectively connected to the second flexible circuit board 51, and a touch chip is provided on the second flexible circuit board 51. The touch chip can process the signals on the first touch electrode 2021 and the second touch electrode 2022 to realize the touch function.

[0057] The auxiliary light source 40 is arranged on the side of the touch substrate 201, and the positive electrode of the auxiliary light source 40 is connected to the positive end of the second flexible circuit board 51 through the positive electrode connecting line 401, and the negative electrode of the auxiliary light source 40 is connected to the negative end of the second flexible circuit board 51 through the negative electrode connecting line 402.

[0058] The technical solution provided in this embodiment disposes the auxiliary light source 40 on the side of the touch substrate 201 (for example, it can be disposed below the ink on the cover plate 10), and uses side routing technology to connect the positive and negative electrodes of the auxiliary light source 40 to the second flexible circuit board 51 respectively. In the prior art, the flexible circuit board corresponding to the auxiliary light source 40 (this flexible circuit board and the second flexible circuit board 51 are located on different sides) needs to be fixed to the light guide plate, resulting in an increase in the bezel of the display panel. However, in this embodiment, because the auxiliary light source 40 is disposed on the touch substrate 201 and shares the same second flexible circuit board 51 with the touch electrode layer 202, there is no need to provide a separate flexible circuit board for the auxiliary light source 40. Therefore, the binding width of the flexible circuit board can be reduced, which is conducive to reducing the bezel width and thus achieving a narrow bezel design.

[0059] Continue to refer Figure 2 In this embodiment, multiple auxiliary light sources 40 are arranged sequentially on the same side surface of the touch substrate 201 to uniformly provide sufficient supplemental light for the reflective display panel. The positive electrodes of the multiple auxiliary light sources 40 are connected in series and then connected to the positive terminal of the second flexible printed circuit board 51. The negative electrodes of the multiple auxiliary light sources 40 are connected in series and then connected to the negative terminal of the second flexible printed circuit board 51.

[0060] Optionally, the auxiliary light source 40 and the second flexible circuit board 51 may be located on opposite sides of the touch substrate 201 , which helps to reduce wiring difficulty.

[0061] Figure 3 This is a schematic diagram of another reflective display panel provided by an embodiment of the present invention, referring to Figure 2 and Figure 3 Based on the above embodiments, optionally, the light guide structure 61 includes light guide dots 60 , which are located on the surface of the touch substrate 201 close to the cover plate 10 , so that the light emitted by the auxiliary light source 40 is reflected to the liquid crystal box 30 .

[0062] Specifically, the light-guiding dots 60 can be in the shape of a triangular pyramid or a circular dot, and can be fabricated on the surface of the touch-sensitive substrate 201 using a laser direct-write lithography process. When the auxiliary light source 40 is turned on, light emitted by the auxiliary light source 40 is totally reflected by the light-guiding dots 60, thereby directing the light into the liquid crystal cell 30. Optionally, the light-guiding dots 60 can be integrally formed with the touch-sensitive substrate 201.

[0063] Figure 4 This is a schematic diagram of another reflective display panel provided by an embodiment of the present invention, referring to Figure 4Based on the above embodiments, optionally, the liquid crystal cell 30 includes a first substrate 301, a liquid crystal layer 303, and a second substrate 302. The liquid crystal layer 303 is located between the first substrate 301 and the second substrate 302. A common electrode 304 is provided on the side of the first substrate 301 near the liquid crystal layer 303, and a pixel electrode 305 is provided on the side of the second substrate 302 near the liquid crystal layer 303. The plurality of pixel electrodes 305 are insulated from each other, and the area where the orthographic projections of each pixel electrode 305 and the common electrode 304 overlap on the second substrate 302 forms a pixel region. For example, a first pixel region is formed between the first pixel electrode 305 and the common electrode 304, a second pixel region is formed between the second pixel electrode 305 and the common electrode 304, and a third pixel region is formed between the third pixel electrode 305 and the common electrode 304. The first pixel region, the second pixel region, and the third pixel region are repeated sequentially. The first pixel region can be a red pixel region, the second pixel region can be a green pixel region, and the third pixel region can be a blue pixel region.

[0064] The second substrate 302 is located on the side of the first substrate 301 away from the touch structure layer 20. The upper surface of the touch structure layer 20 is bonded to the cover plate 10 via a first adhesive layer 71, and the lower surface of the touch structure layer 20 is bonded to the first substrate 301 in the liquid crystal cell 30 via a second adhesive layer 72.

[0065] In an optional embodiment, the liquid crystal layer 303 may be a cholesteric liquid crystal layer. Cholesteric liquid crystal has two stable textures: the P state (Planar) and the FC state (Focal Conic). Under a certain electric field, the P state and the FC state can be converted to each other. Neither the P state nor the FC state requires voltage maintenance, and in the absence of voltage, the P state or the FC state can be maintained for a long time. When the cholesteric liquid crystal is in the P state, its reflection spectrum is in the visible spectrum. The cholesteric liquid crystal reflects bright colored light, and the specific reflected color can be set based on the pitch of the cholesteric liquid crystal. By changing the pitch of the cholesteric liquid crystal, the wavelength of the reflected light from the cholesteric liquid crystal can be controlled. When the cholesteric liquid crystal is in the FC state, the cholesteric liquid crystal no longer reflects the aforementioned colored light, and light can be scattered and transmitted through the cholesteric liquid crystal.

[0066] Specifically, at zero voltage, the initial state of the cholesteric liquid crystal is the P state. Depending on the orientation of the cholesteric liquid crystal, the spectrum of visible light it reflects varies, and the reflected spectrum band is proportional to the cholesteric liquid crystal's pitch and birefringence. When a voltage is applied across the cholesteric liquid crystal and slowly reduced to zero, the cholesteric liquid crystal rotates and stagnates in the FC state.

[0067] Since cholesteric liquid crystal has a selective reflection effect, a reflective layer may not be provided at the bottom of the liquid crystal layer 303 (the side of the second substrate 302 away from the liquid crystal layer 303 ).

[0068] Optionally, an absorption layer 306 is provided on the side of the second substrate 302 away from the liquid crystal layer 303. The absorption layer 306 may be coated with black paint and is used to absorb light that passes through the cholesteric liquid crystal layer. The purpose of providing the absorption layer 306 is, on the one hand, to absorb scattered light and light not reflected by the cholesteric liquid crystal layer, thereby making the difference between the bright and dark states more pronounced, thereby greatly improving the contrast of the image or information displayed. On the other hand, the absorption layer 306 absorbs stray light that does not belong to the target color, reducing interference from light of other wavelengths, making the colors reflected by the cholesteric liquid crystal more pure and vivid, and improving the color display quality.

[0069] Figure 5 This is a schematic diagram of the optical path of a reflective display panel provided by an embodiment of the present invention, specifically showing the optical path of the auxiliary light source 40 when it is turned off. Figure 5 When the auxiliary light source 40 is off (e.g., when the ambient light is bright), in the first display type (e.g., displaying a white image), no voltage is applied to the common electrode 304 and the pixel electrode 305, and the cholesteric liquid crystal is in the P state. By adjusting the pitch of the cholesteric liquid crystal, it is caused to reflect red light, green light, and blue light, respectively. In the first display type (e.g., displaying a static image), different voltages are applied to the cholesteric liquid crystal according to the display image, causing it to achieve different degrees of scattering and reflection, and the scattered light is absorbed by the absorption layer 306. In the second display type (e.g., displaying a monochrome image), for example, displaying blue, after applying a voltage to the cholesteric liquid crystals in the first pixel area and the second pixel area, the voltage is slowly reduced to zero, so that the state of the cholesteric liquid crystals in the first pixel area and the second pixel area is stabilized in the FC state. Incident light passes through the cholesteric liquid crystals in the first pixel area and the second pixel area and is absorbed by the absorption layer 306. No voltage is applied to the cholesteric liquid crystal in the third pixel area, and it is in the P state. By adjusting the pitch, it is caused to reflect blue light.

[0070] Figure 6 This is a schematic diagram of the light path of another reflective display panel provided by the embodiment of the present invention, specifically showing the light path of the auxiliary light source 40 when it is turned on. Figure 6 When the auxiliary light source 40 is on (e.g., when the ambient light is dim), the light guide dots 60 on the surface of the touch structure layer 50 undergo total internal reflection, directing the light from the auxiliary light source 40 into the liquid crystal cell 30. When displaying different images, the state of the cholesteric liquid crystal layer is the same as when the auxiliary light source 40 is off, and will not be further described here.

[0071] Figure 7 A schematic diagram of the optical path of another reflective display panel provided in an embodiment of the present invention, specifically showing the optical path when the screen is off, referring to Figure 7 When the reflective display panel is in the third display type (such as the screen-off state), the auxiliary light source 40 is turned off, a voltage is applied to the cholesteric liquid crystal layer, and the voltage is slowly reduced to zero, so that all cholesteric liquid crystals in the cholesteric liquid crystal layer are in the FC state. The ambient light is scattered by the cholesteric liquid crystal layer and then absorbed by the absorption layer 306. No light is reflected out, and the screen is off.

[0072] In another optional embodiment provided by the present invention, the liquid crystal layer 303 may also be a dye liquid crystal layer. The dye liquid crystals in the dye liquid crystal layer have a light absorption axis and a light transmission axis, with strong light absorption along the long axis and weak light absorption along the short axis. The orientation and light absorption state of the dye liquid crystals can be controlled by an electric field.

[0073] Optionally, a reflective layer 308 is provided on the side of the second substrate 302 away from the liquid crystal layer 303. The reflective layer 308 is used to reflect light passing through the dye liquid crystal layer. The reflective layer 308 may be an aluminum layer.

[0074] The liquid crystal cell 30 also includes a color filter substrate 307, which is located between the first substrate 301 and the common electrode 304. Color filter layers of different colors are alternately arranged on the color filter substrate 307. Each pixel region has a corresponding color filter layer of the same color. Incident light passing through the color filter layers displays light of the corresponding color. The different color filter layers are separated by a black matrix.

[0075] Figure 8 This is a schematic diagram of the optical path of a reflective display panel provided by an embodiment of the present invention, specifically showing the optical path of the auxiliary light source 40 when it is turned off. Figure 8 When the auxiliary light source 40 is off (e.g., when the ambient light is bright), in the first display mode (e.g., displaying a white image or a dynamic image), a voltage is applied to the common electrode 304 and the pixel electrode 305. Under the action of the electric field, the dye liquid crystals change their arrangement direction, such that the dye liquid crystals are in a standing position, allowing external light to pass through the dye liquid crystal layer and be reflected by the reflective layer 308, thereby realizing the image display. In the second display mode (e.g., displaying a monochrome image), for example, displaying blue, no voltage is applied to the dye liquid crystals in the first and second pixel regions, and the dye liquid crystals are in a lying position. Ambient light passes through the color filter substrate 307 and is absorbed by the dye liquid crystals, causing the first and second pixel regions to appear black. A voltage is applied to the dye liquid crystals in the third pixel region, changing their arrangement direction. After the ambient light is filtered by the color filter substrate 307, blue light passes through the dye liquid crystals and is reflected by the reflective layer 308, then is transmitted through the color filter substrate 307 again, thereby realizing a single blue display.

[0076] Figure 9 This is a schematic diagram of the light path of another reflective display panel provided by an embodiment of the present invention, specifically showing the light path of the auxiliary light source 40 when it is turned on. Figure 9 When the auxiliary light source 40 is on (e.g., when the ambient light is dim), the light guide dots 60 on the surface of the touch structure layer 50 undergo total internal reflection, directing the light from the auxiliary light source 40 into the liquid crystal cell 30. When displaying different images, the state of the dye liquid crystal layer is the same as when the auxiliary light source 40 is off, and will not be further described here.

[0077] Figure 10 A schematic diagram of the optical path of another reflective display panel provided in an embodiment of the present invention, specifically showing the optical path when the screen is off, referring to Figure 10 When the reflective display panel is in the third display type (such as the screen-off state), the auxiliary light source 40 is turned off, no voltage is applied to the dye liquid crystal layer, the dye liquid crystals in each pixel area are in a lying position, and the ambient light is absorbed by the dye liquid crystal after passing through the dye liquid crystal layer, thereby achieving the screen-off state.

[0078] Optionally, the auxiliary light source 40 may also be disposed on the cover plate 10 . The auxiliary light source 40 is connected to the first flexible circuit board 50 . The first flexible circuit board 50 is used to provide an operating voltage for the auxiliary light source 40 .

[0079] Figure 11 A schematic structural diagram of another reflective display panel provided in an embodiment of the present invention. Figure 12 This is a schematic diagram of another reflective display panel provided by an embodiment of the present invention, referring to Figure 11 and Figure 12 The auxiliary light source 40 is located on the side surface of the cover plate 10 and can be fixed to the side surface of the cover plate 10, for example, using a black adhesive material. The black adhesive material can prevent light leakage from the auxiliary light source 40. A plurality of light guide dots 60 are provided on the surface of the cover plate 10 away from the touch structure layer 20. Light emitted by the auxiliary light source 40 is totally reflected by the light guide dots 60, thereby guiding the light emitted by the auxiliary light source 40 into the liquid crystal cell 30.

[0080] Optionally, the light guide points 60 and the cover plate 10 may be an integrated structure.

[0081] In this embodiment, the touch structure layer 20 is bonded to the cover plate 10 and the liquid crystal cell 30 via a first adhesive layer 71 and a second adhesive layer 72, respectively. The first flexible circuit board 50 is also bonded to the surface of the cover plate 10 near the touch structure layer 20 via the first adhesive layer 71. The auxiliary light source 40 and the first flexible circuit board 50 are located on the same side of the cover plate 10, facilitating connection between the auxiliary light source 40 and the first flexible circuit board 50. On the side where the first flexible circuit board 50 is located, the orthographic projection of the first adhesive layer 71 on the cover plate 10 overlaps the orthographic projection of the touch structure layer 20 on the cover plate 10. In other words, on the side near the auxiliary light source 40, the first adhesive layer 71 is larger than the touch structure layer 20 to facilitate bonding with the first flexible circuit board 50. Alternatively, on the side away from the auxiliary light source 40, the first adhesive layer 71 may be smaller than or equal to the touch structure layer 20.

[0082] in, Figure 11 The liquid crystal layer 303 in the reflective display panel is a cholesteric liquid crystal layer, and its specific working principle can refer to the relevant description of the cholesteric liquid crystal layer in the above embodiment. Figure 12 The liquid crystal layer 303 in the reflective display panel is a dye liquid crystal layer. The specific working principle thereof can be referred to the relevant description of the dye liquid crystal layer in the above embodiment, which will not be repeated here.

[0083] In this embodiment, regardless of whether the liquid crystal layer 303 is a cholesteric liquid crystal layer or a dye liquid crystal layer, no polarizer is required, which helps reduce light loss. When the ambient light is dim, the auxiliary light source 40 can be used to provide fill light, increasing the display brightness and thus improving contrast. In addition, by integrating the light guide network 60 with the cover plate 10 or the touch structure layer 20, the light guide plate is no longer required, which can reduce the manufacturing process and reduce light loss, thereby improving light reflection.

[0084] Optionally, in the above embodiments, the reflective display panel provided in this embodiment also includes an explosion-proof film 80, which can enhance the mechanical strength of the display panel. At the same time, when the display panel is impacted by external force, the explosion-proof film 80 can effectively stick the broken glass fragments together to prevent the glass fragments from flying and injuring people.

[0085] Optionally, an embodiment of the present invention further provides a display device. The display device provided in this embodiment can be an e-reader (such as an e-book or e-newspaper), or can be other electronic products such as price tags. The display device includes the reflective display panel provided in any embodiment of the present invention, and thus the display device also has the beneficial effects described in any of the above embodiments.

[0086] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this utility model can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this utility model can be achieved. This is not limited herein.

[0087] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A reflective display panel, characterized in that: include: cover; A touch structure layer, the touch structure layer being located on one side of the cover plate; a liquid crystal box, the liquid crystal box being located on a side of the touch structure layer away from the cover plate; An auxiliary light source is located on a side of the cover plate or the touch structure layer, and a light guide structure is provided on the cover plate or the touch structure layer.

2. The reflective display panel according to claim 1, wherein: The touch structure layer includes a touch substrate, a touch electrode layer, and a second flexible circuit board. The touch electrode layer is located on a side of the touch substrate away from the liquid crystal cell. The second flexible circuit board is bound and connected to the touch substrate, and the touch electrode layer is connected to the second flexible circuit board. The auxiliary light source is located on a side surface of the touch substrate, and the auxiliary light source is connected to the second flexible circuit board.

3. The reflective display panel according to claim 2, wherein: There are multiple auxiliary light sources, the positive electrodes of the multiple auxiliary light sources are connected in series and then connected to the positive end of the second flexible circuit board, and the negative electrodes of the multiple auxiliary light sources are connected in series and then connected to the negative end of the second flexible circuit board; The auxiliary light source and the second flexible circuit board are located on two opposite sides of the touch substrate.

4. The reflective display panel according to claim 2, wherein: The light guide structure includes light guide dots, and the light guide dots are located on the surface of the touch substrate close to the cover plate, so that the light emitted by the auxiliary light source is reflected to the liquid crystal box.

5. The reflective display panel according to claim 1, wherein: The auxiliary light source is located on a side surface of the cover plate, and the light guide structure includes light guide points. The light guide points are located on a surface of the cover plate away from the touch structure layer, so that light emitted by the auxiliary light source is reflected to the liquid crystal box; The reflective display panel further includes a first flexible circuit board, and the auxiliary light source is connected to the first flexible circuit board.

6. The reflective display panel according to claim 5, wherein: The touch structure layer is bonded to the cover plate and the liquid crystal cell respectively through a first adhesive layer and a second adhesive layer, and the first flexible circuit board is bonded to a surface of the cover plate close to the touch structure layer through the first adhesive layer; The auxiliary light source and the first flexible circuit board are located on the same side of the cover plate. On the side where the first flexible circuit board is provided, the orthographic projection of the first adhesive layer on the cover plate covers the orthographic projection of the touch structure layer on the cover plate.

7. The reflective display panel according to claim 1, wherein: The liquid crystal cell includes a first substrate, a liquid crystal layer, and a second substrate. The liquid crystal layer is located between the first substrate and the second substrate. A common electrode is provided on a side of the first substrate close to the liquid crystal layer, and a pixel electrode is provided on a side of the second substrate close to the liquid crystal layer. The plurality of pixel electrodes are insulated from each other, and a pixel region is formed in an area on the second substrate where the orthographic projections of each pixel electrode and the common electrode overlap. The second substrate is located on a side of the first substrate away from the touch structure layer.

8. The reflective display panel according to claim 7, wherein: The liquid crystal layer is a cholesteric liquid crystal layer; An absorption layer is provided on a side of the second substrate away from the liquid crystal layer, and the absorption layer is used to absorb light passing through the cholesteric liquid crystal layer.

9. The reflective display panel according to claim 7, wherein: The liquid crystal layer is a dye liquid crystal layer; A reflective layer is provided on a side of the second substrate away from the liquid crystal layer, wherein the reflective layer is used to reflect light passing through the dye liquid crystal layer; The liquid crystal box further comprises a color filter substrate, which is located between the first substrate and the common electrode. Color resist layers of different colors are arranged at intervals on the color filter substrate, and each pixel area is correspondingly provided with a color resist layer of the same color.

10. A display device, characterized in that: The reflective display panel comprises the reflective display panel according to any one of claims 1 to 9.

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