A reflective display panel, device and manufacturing method

Abstract

The application discloses a reflective display panel, a device and a manufacturing method, wherein the reflective display panel comprises a reflective substrate, a light-emitting layer arranged on one side of the reflective substrate, the light-emitting layer being provided with a plurality of light-emitting units, a first electrode layer arranged on one side of the reflective substrate close to the light-emitting layer, a liquid crystal layer arranged on one side of the first electrode layer away from the reflective substrate, and a second electrode layer arranged on one side of the liquid crystal layer away from the reflective substrate, wherein the first electrode layer and the second electrode layer are used for controlling the flipping of the liquid crystal layer, and the light emitted by the plurality of light-emitting units is directed towards the reflective substrate and is emitted towards the liquid crystal layer under the reflection of the reflective substrate. The application solves the problem of excessively low brightness and contrast of the panel when the ambient light is insufficient.

Description

Technical Field

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

[0002] Reflective display devices work by reflecting ambient light incident on the display panel, creating reflected light that passes through the pixel structure of the color filter and is received by the human eye, thus achieving the display function. Examples include electronic paper, e-ink screens, and reflective liquid crystal displays. Because reflective display products do not require a backlight structure, they achieve low power consumption and have been widely used. However, the display quality of this type of reflective display device is directly affected by changes in ambient light intensity. In relatively dark environments, it suffers from low brightness and contrast, severely impacting the user experience. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a reflective display panel, device and manufacturing method, which solves the problem of low brightness and contrast of the panel when there is insufficient ambient light.

[0004] In a first aspect, this application provides the following technical solution through an embodiment:

[0005] A reflective display panel, characterized in that it comprises:

[0006] A reflective substrate; a light-emitting layer disposed on one side of the reflective substrate; a first electrode layer disposed on the side of the reflective substrate close to the light-emitting layer; a liquid crystal layer disposed on the side of the first electrode layer away from the reflective substrate; and a second electrode layer disposed on the side of the liquid crystal layer away from the reflective substrate; wherein the first electrode layer and the second electrode layer are used to control the flipping of the liquid crystal layer; the light emitted by the light-emitting layer is directed toward the reflective substrate and is emitted toward the liquid crystal layer under the reflection of the reflective substrate.

[0007] Optionally, the light-emitting layer is disposed between the first electrode layer and the reflective substrate.

[0008] Optionally, the light-emitting layer is provided with a plurality of light-emitting units; the first electrode layer is provided with a plurality of thin-film transistors, and the orthographic projection of each light-emitting unit on the first electrode layer coincides with the thin-film transistor.

[0009] Optionally, it may also include a microstructure layer disposed on the side of the light-emitting layer away from the reflective substrate, the microstructure layer comprising an array of multiple frustum structures.

[0010] Optionally, the reflective substrate includes: a substrate and a reflective layer; the reflective layer is disposed between the substrate and the light-emitting layer.

[0011] Optionally, the reflective substrate includes: a substrate and a reflective layer; the substrate is transparent and is disposed between the reflective layer and the light-emitting layer.

[0012] Optionally, the reflective layer is provided with multiple reflective areas, each of which corresponds to a light-emitting unit; each reflective area is used to reflect the light from the corresponding light-emitting unit so that the direction of the reflected light is perpendicular to the reflective substrate.

[0013] Optionally, the light-emitting unit is a micron-sized light-emitting diode.

[0014] Secondly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0015] A reflective display device includes a reflective display panel as described in any of the first aspects above.

[0016] Thirdly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0017] A method for manufacturing a reflective display panel, comprising:

[0018] A reflective substrate is provided; a light-emitting layer and a first electrode layer are formed on one side of the reflective substrate; a liquid crystal layer is formed on the side of the first electrode layer away from the reflective substrate; a second electrode layer is formed on the side of the liquid crystal layer away from the reflective substrate; wherein the first electrode layer and the second electrode layer are used to control the flipping of the liquid crystal layer; the light emitted by the light-emitting layer unit is directed toward the reflective substrate and is emitted toward the liquid crystal layer under the reflection of the reflective substrate.

[0019] In the reflective display panel and apparatus provided in this embodiment of the invention, and the reflective display panel manufactured by the method for manufacturing the reflective display panel, a light-emitting layer is disposed between the reflective substrate and the liquid crystal layer. In low ambient light conditions, the light-emitting layer can be controlled to emit light, which is directed towards the reflective substrate and, after reflection from the reflective substrate, is emitted towards the liquid crystal layer. This effectively compensates for insufficient ambient light. Furthermore, since the light-emitting layer of this reflective display panel is disposed on the side of the liquid crystal layer away from the light-emitting direction of the panel, light leakage is almost negligible during L0 display. Therefore, the reflective display panel in this embodiment not only solves the problem of low brightness and contrast in low ambient light conditions but also avoids light leakage during L0 display.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first reflective display panel provided in an embodiment of the present invention;

[0023] Figure 1A for Figure 1 Schematic diagram of an optical path where light output is unfavorable to the front-center optical film;

[0024] Figure 2 This is a schematic diagram of an embodiment of the second type of reflective display panel provided in this invention.

[0025] Figure 3 This is a schematic diagram of another embodiment of the second type of reflective display panel provided in the present invention;

[0026] Figure 4 This is a schematic diagram showing the positional relationship between the thin-film transistor and the light-emitting unit in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of another embodiment of the second type of reflective display panel provided in the present invention;

[0028] Figure 6 This is a schematic diagram of the planar position of the reflective area in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the light path of the light-emitting unit after reflection by the reflective layer in an embodiment of the present invention;

[0030] Figure 8 This is a flowchart illustrating a method for manufacturing a reflective display panel according to an embodiment of the present invention. Detailed Implementation

[0031] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0032] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0033] In the context of this disclosure, when a layer / element is referred to as being "above" another layer / element, the layer / element may be directly above the other layer / element, or there may be an intermediate layer / element between them. Additionally, if a layer / element is "above" another layer / element in one orientation, then when the orientation is reversed, the layer / element may be "below" the other layer / element.

[0034] The current reflective display panels suffer from several problems: the display effect is directly affected by changes in ambient light intensity, and in relatively dark environments, they have low brightness and contrast, which seriously affects the user experience.

[0035] Please see Figure 1 This invention provides a reflective display panel 100, which may include a substrate 101, a reflective layer 102, a liquid crystal structure 103, and a front light film 104. The reflective layer 102 may be disposed on a first side or a second side of the substrate 101; the liquid crystal structure 103 is disposed on the first side of the substrate 101; the front light film 104 is disposed on the side of the liquid crystal structure 103 away from the substrate 101, and a light-emitting light source 105 is disposed at the edge of the film layer of the front light film 104. The light source 105 may be an LED (Light-Emitting Diode) light source. The front light film 104 may be a light guide plate (LGP). The liquid crystal structure 103 includes a liquid crystal layer and an electrode structure layer controlling the liquid crystal layer; specific details can be understood with reference to existing implementations and will not be elaborated here. In some implementations, a polarizer 106 may also be included, disposed between the liquid crystal structure 103 and the front light film 104.

[0036] When the ambient light is low, the light source 105 can be turned on. The light emitted by the light source 105 enters the front light film 104, and under the light guiding effect of the front light film 104, it is directed towards the substrate of the reflective display panel 100. It is reflected on the reflective layer 102, and then emitted as light through the liquid crystal structure 103 and the color filter layer. In this reflective display panel 100, the front light film 104 structure and the corresponding light source 105 effectively compensate for the lack of brightness and contrast of the display panel due to insufficient ambient light, thus improving its applicability in different environments.

[0037] While the above embodiments can improve the brightness and contrast of the panel in dim environments to some extent, when the light source 105 is turned on, light leaks in the light guide plate towards the light emission direction of the panel, resulting in unfavorable light emission and poor display quality. For example, the grayscale L0 (black display) brightness may be too high, and the image contrast may be low. To address this problem, the present invention provides another embodiment below.

[0038] Please see Figure 2 In another embodiment of the present invention, a reflective display panel 200 is also provided. The reflective display panel 200 includes: a reflective substrate 210, a light-emitting layer 220, a first electrode layer 230, a liquid crystal layer 240, and a second electrode layer 250. The light-emitting layer 220 is disposed on one side of the reflective substrate 210; the first electrode layer 230 is disposed on the side of the reflective substrate 210 closest to the light-emitting layer 220; the liquid crystal layer 240 is disposed on the side of the first electrode layer 230 furthest from the reflective substrate 210; and the second electrode layer 250 is disposed on the side of the liquid crystal layer 240 furthest from the reflective substrate 210. The first electrode layer 230 and the second electrode layer 250 are used to control the flipping of the liquid crystal layer 240. Light emitted from the light-emitting layer 220 is directed toward the reflective substrate 210 and, under the reflection of the reflective substrate 210, is emitted toward the liquid crystal layer 240.

[0039] In this embodiment, when the ambient light is low, the light-emitting layer 220 can be controlled to emit light, which is directed towards the reflective substrate 210 and reflected by the reflective substrate 210 before exiting towards the liquid crystal layer 240. This effectively compensates for insufficient ambient light. Furthermore, since the light-emitting layer 220 of this reflective display panel 200 is located on the side of the liquid crystal layer 240 away from the light emission direction of the panel, light leakage is negligible during L0 display. Therefore, the reflective display panel 200 in this embodiment not only solves the problem of low brightness and contrast when the ambient light is insufficient, but also avoids light leakage during L0 display. The specific implementation of each structure in this embodiment will be described in more detail below.

[0040] The reflective substrate 210 may include a substrate 211 and a reflective layer 212.

[0041] The reflective layer 212 can be disposed on either side of the substrate 211. For example, the reflective layer 212 can be disposed on the front side of the substrate 211 or on the back side of the substrate 211. The front side of the substrate 211 is the side from which the reflective display panel 200 emits light. When the reflective layer 212 is disposed on the back side of the substrate 211, the substrate 211 should be a transparent substrate, or, for example, a glass substrate, or a substrate of a flexible transparent organic material. In this embodiment, the following description will continue to use the example of the reflective layer 212 being disposed on the front side of the substrate 211 as an example. Figure 3 As shown.

[0042] The light-emitting layer 220 can be disposed on the side of the reflective layer 212 away from the substrate 211. Simultaneously, the first electrode layer 230 can be disposed between the light-emitting layer 220 and the reflective layer 212, or it can be disposed on the side of the light-emitting layer 220 away from the substrate 211. Please refer to [link / reference]. Figure 4 The light-emitting layer 220 is provided with multiple light-emitting units 221. The light-emitting layer 220 can be used to emit light when the ambient light is insufficient, specifically by emitting light through the light-emitting units 221 to compensate for the ambient light, thereby improving the brightness and contrast of the panel. In this embodiment, the light-emitting layer 220 can be disposed between the first electrode layer 230 and the reflective layer 212, so that the light generated by the light-emitting layer 220 does not pass through the first electrode layer 230 before being reflected, but passes through the first electrode layer 230 after reflection. Compared with the first electrode layer 230 being disposed between the light-emitting layer 220 and the reflective layer 212, the light of the light-emitting layer 220 can pass through the first electrode layer 230 one less time, which can improve the light utilization rate and improve the contrast and brightness when the light-emitting layer 220 is turned on.

[0043] In some implementations, the first electrode layer 230 is further provided with a plurality of thin film transistors (TFTs). Specifically, the first electrode layer 230 may include a transparent substrate on which a plurality of thin film transistors 231 are disposed. The orthographic projection of each light-emitting unit 221 onto the first electrode layer 230 coincides with the thin film transistor 231, which may be either completely or partially coincident.

[0044] Understandably, the complete overlap here does not only include a 1:1 overlap in area between a single thin-film transistor 231 and a light-emitting unit 221; it also includes situations where the area of ​​a single thin-film transistor 231 is larger than the area of ​​a single light-emitting unit 221, so that the projection of the light-emitting unit 221 can completely overlap with the projection of the thin-film transistor 231, such as... Figure 4As shown; conversely, when the area of ​​a single light-emitting unit 221 is larger than the area of ​​a single thin-film transistor 231, the projection of the thin-film transistor 231 can completely overlap with the projection of the light-emitting unit 221. In this implementation, the light emitted by the light-emitting unit 221 can be fully transmitted through the first electrode layer 230 after being reflected, without being affected or with reduced influence from the thin-film transistor 231, thus improving the light transmittance.

[0045] Furthermore, the light-emitting unit 221 and the thin-film transistor 231 can be in a one-to-one correspondence, or the first light-emitting unit 221 can correspond to multiple thin-film transistors 231, or multiple light-emitting units 221 can correspond to one thin-film transistor 231. This can be determined based on design parameters and application scenarios, and is not limited here. For example, in applications requiring high contrast and brightness, a one-to-one correspondence between the light-emitting unit 221 and the thin-film transistor 231 can be used; in applications requiring energy saving, a one-to-many design between the light-emitting unit 221 and the thin-film transistor 231 can be used.

[0046] In some implementations, the light-emitting unit 221 can be an LED light-emitting structure; for example, the light-emitting unit 221 can be a micro LED, which allows for flexible adjustment of the small pitch and achieves the advantages of high contrast and low power consumption. The micro LED can be made into rectangular, circular, or other shapes. For example, it can be designed based on the size and shape of the thin-film transistor 231, so that the projected area of ​​the micro LED on the reflective substrate 210 is smaller than the projected area of ​​the thin-film transistor 231 on the reflective substrate 210, thereby ensuring the aperture ratio of the display pixels and avoiding the light-blocking effect of the micro LED itself.

[0047] The liquid crystal layer 240 mainly comprises liquid crystal molecules. Under the control of the first electrode layer 230 and the second electrode layer 250, the liquid crystal layer 240 flips, thereby changing the light transmittance. In some implementations, an electrochromic layer can be used to replace the liquid crystal layer 240 to achieve a similar effect, wherein the first electrode layer 230 and the second electrode layer 250 serve as the two electrode layers of the electrochromic layer.

[0048] For some implementation methods, please refer to Figure 5 The reflective display panel 200 further includes a microstructure layer 270, which is disposed on the side of the light-emitting layer 220 away from the reflective substrate 210. The microstructure layer 270 is used to reduce the angle between the reflected light and the vertical direction of the reflective substrate 210. Specifically, the microstructure layer 270 can be disposed between the light-emitting layer 220 and the first electrode layer 230, or between the first electrode layer 230 and the liquid crystal layer 240, without limitation.

[0049] The microstructure layer 270 can be an array composed of multiple microstructure layer units 271, each of which has a frustum structure. The diameter of the end of the frustum structure closest to the reflective substrate 210 can be larger than the diameter of the other end. When the light from the light-emitting layer 220 is reflected by the reflective layer 212 and then passes through the microstructure layer 270, the light is reflected by the sidewall of the frustum structure of the microstructure layer 270, thereby making the direction of the light more perpendicular to the reflective substrate 210, improving light utilization, and thus improving brightness and contrast. In addition, more light is emitted from the actual viewing direction of the panel, which can also achieve a certain privacy protection effect.

[0050] For some implementation methods, please refer to Figure 6 , Figure 6 Only the planar positions of each structure are shown. The reflective layer 212 may be provided with multiple reflective areas 2121, each of which corresponds one-to-one with a light-emitting unit 221. Each reflective area 2121 is used to reflect the light from the corresponding light-emitting unit 221, so that the direction of the reflected light is perpendicular to the reflective substrate 210, such as... Figure 7 As shown ( Figure 7 (The surface shape of the reflective area 2121 is not shown in the diagram). It should be noted that the light direction here is perpendicular to the reflective substrate 210, which can be understood as ideally perpendicular. During the manufacturing process, due to the influence of process precision, there may be a certain error between the direction of the reflected light and the perpendicular direction of the reflective substrate 210. This perpendicular relationship also falls under the category of making the direction of the reflected light perpendicular to the reflective substrate 210 as described in this embodiment. Furthermore, being able to reflect most of the light in a vertical direction also falls under the category of making the direction of the reflected light perpendicular to the reflective substrate 210 as described in this embodiment. "Most of" can be understood as most of the area of ​​the reflective layer 212, for example, more than 70% of the area can achieve the goal of making the direction of the reflected light perpendicular to the reflective substrate 210. The proportion can also be 80%, 90%, etc., which can be determined according to production requirements.

[0051] Specifically, the reflective area 2121 can be designed based on the direction of light emitted by the micron-sized light-emitting diode. For example, the reflective area 2121 can be concave to reflect the light emitted by the micron-sized light-emitting diode in a direction perpendicular to the reflective substrate 210. Of course, the reflected light may also be at an angle, and after being further guided by the microstructure layer 270, most of the light can remain perpendicular to the reflective substrate 210. This allows the panel to emit light in the user's normal viewing angle, improving brightness and contrast, and achieving a privacy protection effect.

[0052] In addition, the reflective display panel 200 in this embodiment may also include a color filter layer, a polarizer, a touch layer, etc., which are not shown in the figure.

[0053] In some implementations, the color filter layer may be disposed on the side of the second electrode layer 250 away from the reflective substrate 210. A color resist layer may be disposed in the color filter layer, which may include a red color resist layer, a blue color resist layer, and a green color resist layer; furthermore, a black matrix may be disposed in the color filter layer to define the three color resist layers and simultaneously prevent light crosstalk between the color resist layers. A polarizer may be disposed on the side of the color filter layer away from the reflective substrate 210. A touch layer may be bonded to the side of the polarizer away from the reflective substrate 210 to form a touch panel. A glass cover may also be disposed on the side of the touch layer away from the substrate 211.

[0054] In summary, in the reflective display panel 200 provided in this embodiment, since a light-emitting layer 220 is disposed between the reflective substrate 210 and the liquid crystal layer 240, the light-emitting layer 220 can be controlled to emit light when the ambient light is low. The light emitted by the light-emitting layer 220 is directed towards the reflective substrate 210 and, under the reflection of the reflective substrate 210, is emitted towards the liquid crystal layer 240. This effectively compensates for insufficient ambient light. Furthermore, since the light-emitting layer 220 of this reflective display panel 200 is disposed on the side of the liquid crystal layer 240 away from the light emission direction of the panel, light leakage is almost negligible during L0 display. Therefore, the reflective display panel 200 in this embodiment not only solves the problem of low brightness and contrast of the panel when the ambient light is insufficient, but also avoids the light leakage problem of the panel during L0 display.

[0055] Based on the inventive concept, this invention also provides a reflective display device, including any of the reflective display panels described in the foregoing embodiments. This reflective display device can be a desktop computer monitor, tablet computer, laptop computer, billboard, e-book reader, etc.

[0056] It should be noted that the reflective display device provided in this embodiment can be implemented with reference to the aforementioned reflective display panel embodiment. The beneficial effects produced have been described in the aforementioned reflective display panel embodiment, and will not be repeated here. The specific manufacturing process of each structure can adopt existing technology, and is not limited in this embodiment.

[0057] Please see Figure 8 Based on the same inventive concept, one embodiment of the present invention also provides a method for manufacturing a reflective display panel, the method comprising the following steps:

[0058] Step S10: Provide a reflective substrate;

[0059] Step S20: A light-emitting layer and a first electrode layer are formed on one side of the reflective substrate, wherein the light-emitting layer is provided with a plurality of light-emitting units;

[0060] Step S30: Form a liquid crystal layer on the side of the first electrode layer away from the reflective substrate;

[0061] Step S40: A second electrode layer is formed on the side of the liquid crystal layer away from the reflective substrate; wherein the first electrode layer and the second electrode layer are used to control the flipping of the liquid crystal layer; the light emitted by the plurality of light-emitting units is directed toward the reflective substrate and is emitted toward the liquid crystal layer under the reflection of the reflective substrate.

[0062] The reflective display panel manufactured through steps S10-S40 of this method has a light-emitting layer formed between the reflective substrate and the liquid crystal layer. In low ambient light conditions, the light-emitting layer can be controlled to emit light, which is directed towards the reflective substrate and then reflected back towards the liquid crystal layer. This effectively compensates for insufficient ambient light. Furthermore, because the light-emitting layer of this reflective display panel is located on the side of the liquid crystal layer away from the light-emitting direction of the panel, light leakage is negligible during L0 display. Therefore, the reflective display panel manufactured by the method in this embodiment not only solves the problem of low brightness and contrast in low ambient light conditions but also avoids light leakage during L0 display.

[0063] It should be noted that the manufacturing method of the reflective display panel provided in this embodiment can refer to the structure formed by each step in the foregoing structural embodiments. The beneficial effects produced have been described in the foregoing embodiments concerning reflective display panels, and will not be repeated here. The specific process implementation when each structure is manufactured can adopt existing process technologies, and is not limited in this embodiment.

[0064] The above description does not provide detailed explanations of the technical aspects of each layer's patterning, etching, etc. However, those skilled in the art should understand that various technical means can be used to form layers and regions of the desired shape. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination.

[0065] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0066] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A reflective display panel, characterized in that, include: reflective substrate; A light-emitting layer is disposed on one side of the reflective substrate, and the light-emitting layer is provided with a plurality of light-emitting units, each of which is an LED light-emitting structure; A first electrode layer is disposed on the side of the reflective substrate near the light-emitting layer; A liquid crystal layer is disposed on the side of the first electrode layer away from the reflective substrate; as well as The second electrode layer is disposed on the side of the liquid crystal layer away from the reflective substrate; The first electrode layer and the second electrode layer are used to control the flipping of the liquid crystal layer; the light emitted by the light-emitting layer is directed toward the reflective substrate and is emitted toward the liquid crystal layer under the reflection of the reflective substrate. A microstructure layer is disposed on the side of the light-emitting layer away from the reflective substrate, and the microstructure layer includes a plurality of frustum structures arranged in an array; the diameter of the end of the frustum structure closest to the reflective substrate is larger than the diameter of the other end. The reflective substrate includes a substrate and a reflective layer, wherein the reflective layer is disposed between the substrate and the light-emitting layer; or, the reflective substrate includes a substrate and a reflective layer, wherein the substrate is transparent and is disposed between the reflective layer and the light-emitting layer. The reflective layer is provided with multiple reflective areas, each of which corresponds to a light-emitting unit; each reflective area is used to reflect the light from the corresponding light-emitting unit so that the direction of the reflected light is perpendicular to the reflective substrate. The reflective area is concave to reflect the light emitted by the LED light-emitting structure in a direction perpendicular to the reflective substrate.

2. The reflective display panel as described in claim 1, characterized in that, The light-emitting layer is disposed between the first electrode layer and the reflective substrate.

3. The reflective display panel as described in claim 2, characterized in that, The first electrode layer is provided with a plurality of thin-film transistors, and the orthographic projection of each light-emitting unit on the first electrode layer coincides with the thin-film transistor.

4. A reflective display device, characterized in that, Includes the reflective display panel as described in any one of claims 1-3.

5. A method for manufacturing a reflective display panel, characterized in that, include: Provide reflective substrate; A light-emitting layer and a first electrode layer are formed on one side of the reflective substrate. The light-emitting layer is provided with a plurality of light-emitting units, each of which is an LED light-emitting structure. A microstructure layer is formed on the side of the light-emitting layer away from the reflective substrate. The microstructure layer includes a plurality of frustum structures arranged in an array. The diameter of one end of the frustum structure closest to the reflective substrate is larger than the diameter of the other end. A liquid crystal layer is formed on the side of the first electrode layer away from the reflective substrate; A second electrode layer is formed on the side of the liquid crystal layer away from the reflective substrate; The first electrode layer and the second electrode layer are used to control the flipping of the liquid crystal layer; the light emitted by the light-emitting layer is directed toward the reflective substrate and is emitted toward the liquid crystal layer under the reflection of the reflective substrate. The reflective substrate includes a substrate and a reflective layer, wherein the reflective layer is disposed between the substrate and the light-emitting layer; or, the reflective substrate includes a substrate and a reflective layer, wherein the substrate is transparent and is disposed between the reflective layer and the light-emitting layer. The reflective layer is provided with multiple reflective areas, each of which corresponds to a light-emitting unit; each reflective area is used to reflect the light from the corresponding light-emitting unit so that the direction of the reflected light is perpendicular to the reflective substrate. The reflective area is concave to reflect the light emitted by the LED light-emitting structure in a direction perpendicular to the reflective substrate.

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