Electronic paper display panel and display device, and driving method

Abstract

Embodiments of the present application disclose an electronic paper display panel, a display device and a driving method. In a specific embodiment, the electronic paper display panel comprises a first substrate, a second substrate and a pixel defining portion between the first substrate and the second substrate, the pixel defining portion defines a plurality of pixel units, the pixel unit comprises an electronic ink layer between the first substrate and the second substrate, the electronic ink layer comprises black charged particles, the first substrate comprises a first substrate and a reflective layer arranged on the first substrate, the second substrate comprises a second substrate and a first electrode arranged on the second substrate, at least one of the pixel units comprises a plurality of second electrodes arranged on the reflective layer, wherein at least part of the second electrode is provided with a color resistance layer on the side facing or away from the first substrate. The embodiment can realize color display while shortening the response time of electronic paper display, and further realize color display with adjustable color saturation.

Description

Technical Field

[0001] This invention relates to the field of display technology. More specifically, it relates to an electronic paper display panel, a display device, and a driving method. Background Technology

[0002] Electronic paper (EC) display panels, also known as electronic ink screens, are electronic display devices that provide a visual experience similar to paper, offering advantages such as ease of reading, portability, and low power consumption. However, existing E paper display panels are limited to black and white, resulting in limited color options and long response times. Summary of the Invention

[0003] The purpose of this invention is to provide an electronic paper display panel, display device, and driving method to solve at least one of the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A first aspect of the present invention provides an electronic paper display panel, comprising a first substrate, a second substrate, and a pixel defining portion located between the first substrate and the second substrate. The pixel defining portion defines a plurality of pixel units. Each pixel unit includes an electronic ink layer located between the first substrate and the second substrate. The electronic ink layer includes black charged particles. The first substrate includes a first substrate and a reflective layer disposed on the first substrate. The second substrate includes a second substrate and a first electrode disposed on the second substrate. At least one of the pixel units includes a plurality of second electrodes disposed on the reflective layer. A color resist layer is disposed on at least a portion of the second electrodes facing or away from the first substrate.

[0006] Optionally, the black charged particles are configured as follows:

[0007] Driven by the first electrode and the second electrode, the pixel unit moves to focus on the first electrode or on all the second electrodes, thereby displaying black; or

[0008] Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which is partially provided with a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes provided with color resist layers.

[0009] Optionally, at least one of the second electrodes is not provided with a color resist layer.

[0010] Optionally, the black charged particles are further configured as follows:

[0011] Driven by the first and second electrodes, the pixels move to converge on the second electrode with a partial color resist layer and the second electrode without a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the other second electrodes with color resist layers; or

[0012] Driven by the first and second electrodes, the pixels move to converge on all the second electrodes on which the color resist layer is disposed, thereby enabling the pixel unit to display white; or

[0013] Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which is at least partially free of a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

[0014] Optionally, the color resist layer includes a first color resist layer, a second color resist layer and a third color resist layer, wherein at least one second electrode is disposed of the first color resist layer, at least one second electrode is disposed of the second color resist layer, and at least one second electrode is disposed of the third color resist layer.

[0015] Optionally, a plurality of second electrodes are provided with a first color resist layer, a plurality of second electrodes are provided with a second color resist layer, and a plurality of second electrodes are provided with a third color resist layer.

[0016] Optionally, the projected areas of multiple second electrodes with first color resist layers on the first substrate are the same, the projected areas of multiple second electrodes with second color resist layers on the first substrate are the same, and the projected areas of multiple second electrodes with third color resist layers on the first substrate are the same.

[0017] Optionally, the plurality of second electrodes in at least one of the pixel units are arranged in a matrix or column.

[0018] Optionally, at least one of the pixel units includes a plurality of reflective electrodes disposed on the first substrate, the reflective electrodes being multiplexed as the reflective layer and the second electrode, and the color resist layer being disposed on the side of the reflective electrodes away from the first substrate.

[0019] Optionally, the pixel demarcation portion is disposed between adjacent pixel units, and no pixel demarcation portion is disposed within the pixel unit.

[0020] Optionally, the first substrate further includes a driving circuit layer, which includes a plurality of thin-film transistors that are connected one-to-one with the plurality of second electrodes.

[0021] A second aspect of the present invention provides an electronic paper display device, including the electronic paper display panel provided in the first aspect of the present invention.

[0022] A third aspect of the present invention provides a driving method for driving an electronic paper display panel provided in the first aspect of the present invention, the method comprising:

[0023] Based on the acquired display data, a driving voltage is applied to the second electrode, such that:

[0024] At least one of the black charged particles in the pixel unit moves to gather at the first electrode or at all the second electrodes, so that the pixel unit displays black; or

[0025] At least one of the black charged particles in the pixel unit moves to accumulate on the second electrode where a color resist layer is partially disposed, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes where color resist layers are disposed; or

[0026] At least one of the black charged particles in the pixel unit moves to accumulate on both the second electrode with a partial color resist layer and the second electrode without a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes with color resist layers; or

[0027] At least one of the black charged particles in the pixel unit moves to accumulate on all the second electrodes on which the color resist layer is disposed, so that the pixel unit displays white; or

[0028] At least one of the black charged particles in the pixel unit moves to gather on the second electrode, which is at least partially free of a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

[0029] The beneficial effects of this invention are as follows:

[0030] The technical solution described in this invention can shorten the response time of electronic paper display while realizing color display, and further realize color display with adjustable color saturation. Attached Figure Description

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] Figure 1 This diagram illustrates an electronic paper display panel provided in an embodiment of the present invention.

[0033] Figure 2 This diagram illustrates another schematic of an electronic paper display panel provided in an embodiment of the present invention.

[0034] Figure 3 Show Figure 2 A schematic diagram of the AA section.

[0035] Figure 4 This is a schematic diagram showing a display state of a pixel unit.

[0036] Figure 5 This diagram illustrates another display state of a pixel unit.

[0037] Figure 6 This diagram illustrates another display state of a pixel unit.

[0038] Figure 7 This diagram illustrates another display state of a pixel unit.

[0039] Figure 8 This diagram illustrates another display state of a pixel unit.

[0040] Figure 9 This diagram illustrates another display state of a pixel unit.

[0041] Figure 10 This diagram illustrates another display state of a pixel unit.

[0042] Figure 11 This diagram illustrates another display state of a pixel unit.

[0043] Figure 12 This diagram illustrates another display state of a pixel unit.

[0044] Figure 13 This diagram illustrates another display state of a pixel unit. Detailed Implementation

[0045] In this invention, "on," "formed on," and "set on" can mean that one layer is directly formed or set on another layer, or that one layer is indirectly formed or set on another layer, meaning that there are other layers between the two layers.

[0046] It should be noted that although the terms "first," "second," etc., may be used herein to describe various components, members, elements, regions, layers, and / or portions, these components, members, elements, regions, layers, and / or portions should not be limited by these terms. Rather, these terms are used to distinguish one component, member, element, region, layer, and / or portion from another. Thus, for example, the first component, first member, first element, first region, first layer, and / or first portion discussed below may be referred to as a second component, second member, second element, second region, second layer, and / or second portion without departing from the teachings of the invention.

[0047] In this invention, unless otherwise stated, the term "co-layer arrangement" refers to two layers, components, members, elements, or portions that can be formed by the same fabrication process (e.g., patterning process), and that these two layers, components, members, elements, or portions are generally formed of the same material. For example, co-layer arrangement of two or more functional layers means that these co-layered functional layers can be formed using the same material layer and the same fabrication process, thereby simplifying the fabrication process of the display substrate.

[0048] In this invention, unless otherwise stated, the term "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, and photoresist stripping. The term "one-step patterning process" refers to a process of forming patterned layers, components, or parts using a single photomask.

[0049] An existing electronic paper display panel includes an array substrate and a cover plate disposed opposite to each other, and a pixel defining portion located between the array substrate and the cover plate. The pixel defining portion defines a plurality of pixel units. Each pixel unit includes an electronic ink layer located between the array substrate and the cover plate. The electronic ink layer is disposed within a sealed cavity formed by the array substrate, the cover plate, and the pixel defining portion. The electronic ink layer includes an electrophoretic liquid, a plurality of black charged particles, and a plurality of white charged particles, wherein the black charged particles and the white charged particles have different polarities, for example, the black charged particles are negative and the white charged particles are positive. The array substrate includes a first substrate and a driving circuit layer disposed on the first substrate. Each pixel unit includes a thin-film transistor disposed on the driving circuit layer. A pixel electrode is connected to a TFT. The cover plate includes a second substrate and a common electrode disposed on the second substrate. The common electrode covers the entire surface of the electronic paper display panel, while the pixel electrodes of each pixel unit are independent. By applying different voltages to the pixel electrodes of different pixel units, the black charged particles in the pixel unit can be controlled to move to the common electrode side and the white charged particles to the pixel electrode side, so that after the pixel unit reflects ambient light, the human eye sees the pixel unit as black. Alternatively, the white charged particles in the pixel unit can be controlled to move to the common electrode side and the black charged particles to the pixel electrode side, so that after the pixel unit reflects ambient light, the human eye sees the pixel unit as white, achieving black and white display. On the one hand, this method has the problem of limited color range. On the other hand, the electronic ink layer contains both black and white particles. When the display switches, the two types of particles move relative to each other and collide, resulting in a longer response time for the electronic paper display panel.

[0050] In view of this, one embodiment of the present invention provides an electronic paper display panel, including a first substrate, a second substrate, and a pixel defining portion located between the first substrate and the second substrate. The pixel defining portion defines a plurality of pixel units. Each pixel unit includes an electronic ink layer located between the first substrate and the second substrate. The electronic ink layer includes black charged particles. The first substrate includes a first substrate and a reflective layer disposed on the first substrate. The second substrate includes a second substrate and a first electrode disposed on the second substrate. At least one of the pixel units includes a plurality of second electrodes disposed on the reflective layer. At least a portion of the second electrodes have a color resist layer (also referred to as a color filter layer or color filter layer) disposed on the side facing or away from the first substrate.

[0051] On the one hand, in the electronic paper display panel provided in this embodiment, the electronic ink layer of the pixel unit contains only black charged particles, thereby shortening the response time of the electronic paper display.

[0052] On the other hand, based on the above structure, the display method of the electronic paper display panel provided in this embodiment includes:

[0053] When a pixel unit needs to display black, the movement of black charged particles in the pixel unit can be controlled by applying a voltage to the second electrode of the pixel unit, which serves as the pixel electrode, so that they gather on the first electrode, which serves as the common electrode (or in other words, the black charged particles move to the side of the first electrode). Alternatively, the movement of black charged particles in the pixel unit can be controlled to gather on all the second electrodes, which serve as pixel electrodes, so that the human eye sees the pixel unit as black after it reflects ambient light. For example, if the voltage of the first electrode, which serves as the common electrode, is 0V, and the black charged particles are negatively polar or negatively charged, then the black charged particles can be gathered on the first electrode by applying a negative voltage to all the second electrodes, or the black charged particles can be gathered on all the second electrodes by applying a positive voltage to all the second electrodes, thus achieving the display of black in the pixel unit.

[0054] When a pixel unit needs to display color, the movement of black charged particles in the pixel unit can be controlled by applying a voltage to the second electrode of the pixel unit, which serves as the pixel electrode. This causes the particles to gather on the second electrode, which is partially covered with a color resist layer. As a result, after the pixel unit reflects ambient light, the human eye sees the color corresponding to the color resist layer of the second electrode where no black charged particles have gathered. For example, among multiple second electrodes, some have a red color resist layer, while others do not. The voltage of the first electrode is 0V, and the black charged particles are negatively polarized. By applying a positive voltage to the second electrode without a color resist layer, or by applying a positive voltage to the second electrode without a color resist layer and a negative voltage to the second electrode with a red color resist layer, the black charged particles gather on the second electrode without a color resist layer, thus enabling the pixel unit to display red.

[0055] When only a portion of the second electrode has a color resist layer, and a pixel unit needs to display white, the movement of black charged particles in the pixel unit can be controlled by applying a voltage to the second electrode of the pixel unit, which serves as the pixel electrode. This causes the particles to gather on the second electrode with the color resist layer, so that the human eye sees white after the pixel unit reflects ambient light (assuming the ambient light is white light). For example, among multiple second electrodes, some have a color resist layer, while others do not (the second electrodes without a color resist layer are in direct contact with the electronic ink layer). The voltage of the first electrode is 0V, and the black charged particles are negatively polarized. Therefore, by applying a positive voltage to the second electrode with the color resist layer, or by applying a positive voltage to the second electrode with the color resist layer and a negative voltage to the second electrode without the color resist layer, the black charged particles gather on the second electrode with the color resist layer, thus enabling the pixel unit to display white.

[0056] As can be seen, the electronic paper display panel provided in this embodiment can achieve color display by setting multiple second electrodes as pixel electrodes in the pixel unit and setting a color resist layer in at least some of the second electrodes.

[0057] Based on the above description of the display method of the electronic paper display panel, in one possible implementation, the black charged particles are configured as follows:

[0058] Driven by the first electrode and the second electrode, the pixel unit moves to focus on the first electrode or on all the second electrodes, thereby displaying black; or

[0059] Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which is partially provided with a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes provided with color resist layers.

[0060] In one possible implementation, the pixel defining portion is disposed between adjacent pixel units, and no pixel defining portion is disposed within the pixel unit. That is, in this embodiment, the pixel unit is defined by the pixel defining portion; that is, a pixel defining portion is disposed between adjacent pixel units, and no pixel defining portion is disposed within a pixel unit including multiple pixel electrodes. From another perspective, in existing electronic paper display panels, a pixel unit includes one pixel electrode, while in the electronic paper display panel provided in this embodiment, a pixel unit includes multiple pixel electrodes or a group of pixel electrodes. In existing electronic paper display panels, a pixel defining portion is disposed between two adjacent pixel electrodes, while in the electronic paper display panel provided in this embodiment, a pixel defining portion is disposed between two adjacent groups of pixel electrodes, but no pixel defining portion is disposed between pixel electrodes within a group.

[0061] In a specific example, the first substrate and the second substrate are, for example, glass substrates.

[0062] In a specific example, the first electrode, which serves as a common electrode, covers the entire electronic paper display panel, meaning that the common electrode voltage of each pixel unit is the same. The first electrode, which serves as a common electrode, and the second electrode, which serves as a pixel electrode, are, for example, metal oxide electrodes with high transparency such as indium tin oxide (ITO).

[0063] In a specific example, the reflective layer is, for example, a metal reflective layer, and an insulating layer is provided between the second electrode and the reflective layer to ensure that the multiple second electrodes are isolated from each other. The insulating layer is, for example, an inorganic insulating layer such as silicon dioxide (SiO2), silicon nitride (SiNx), or silicon oxynitride (SiOxNy).

[0064] In one possible implementation, the first substrate further includes a driving circuit layer comprising a plurality of thin-film transistors connected one-to-one with the plurality of second electrodes. This allows voltage to be applied independently to the plurality of second electrodes in the pixel unit, ensuring the switching of display colors by the pixel unit.

[0065] In one possible implementation, at least one pixel unit includes a plurality of reflective electrodes disposed on the first substrate, the reflective electrodes being multiplexed as the reflective layer and the second electrode, and the color resist layer being disposed on the side of the reflective electrodes away from the first substrate.

[0066] For example, the reflective electrode is a highly reflective metal electrode, such as silver (Ag), molybdenum (Mo), or their alloys. Thus, the reflective electrode can simultaneously function as a pixel electrode controlling black charged particles and as a reflective layer reflecting ambient light, thereby reducing the thickness of the first substrate.

[0067] In one possible implementation, at least one of the pixel units has a plurality of second electrodes arranged in a matrix or column.

[0068] For example Figure 1 As shown, the pixel unit in the electronic paper display panel provided in this embodiment may include four second electrodes 101, 102, 103, and 104 arranged in a matrix. Figure 1 As shown, the second electrodes 101, 102, 103, and 104 are each connected to a thin-film transistor 105. For example, the gate of the thin-film transistor 105 is connected to the scan line 106, the first electrode of the source is connected to the data line 107, and the second electrode of the drain is connected to the second electrode serving as the pixel electrode. Figure 1 The dashed box shown represents the pixel unit region defined by the pixel delimiter.

[0069] For example Figure 2As shown, the pixel unit in the electronic paper display panel provided in this embodiment may further include four second electrodes 201, 202, 203 and 204 arranged in columns. Figure 2 As shown, the second electrodes 201, 202, 203, and 204 are each connected to a thin-film transistor. For example, the gate of the thin-film transistor is connected to a scan line, the first electrode of the source is connected to a data line, and the second electrode of the drain is connected to a second electrode serving as a pixel electrode. Figure 2 The dashed box shown represents the pixel unit region defined by the pixel delimiter.

[0070] In one possible implementation, at least one of the second electrodes is not provided with a color resist layer.

[0071] In one possible implementation, the black charged particles are further configured as follows:

[0072] Driven by the first and second electrodes, the pixels move to converge on the second electrode with a partial color resist layer and the second electrode without a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the other second electrodes with color resist layers; or

[0073] Driven by the first and second electrodes, the pixels move to converge on all the second electrodes on which the color resist layer is disposed, thereby enabling the pixel unit to display white; or

[0074] Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which is at least partially free of a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

[0075] This enables white display and color display with adjustable color saturation, as illustrated in subsequent specific examples.

[0076] In one possible implementation, the color resist layer includes a first color resist layer, a second color resist layer, and a third color resist layer. At least one second electrode is disposed on the first color resist layer, at least one second electrode is disposed on the second color resist layer, and at least one second electrode is disposed on the third color resist layer. This enables multi-color display of a single pixel unit. For example, the first color resist layer may be a red color resist layer, the second color resist layer a green color resist layer, and the third color resist layer a blue color resist layer. Further examples will illustrate this in subsequent implementations.

[0077] Based on the structure of the above implementation method, in a specific example, for example Figure 3 As shown, the pixel unit defined by the pixel defining portion 309 includes four reflective electrodes 301, 302, 303 and 304 arranged in a row on the first substrate 321. Figure 3In this example, the pixel unit is defined by the pixel defining part 305. Above the electronic ink layer 306 is a first electrode 307, which serves as a common electrode, disposed on the second substrate 322. The voltage of the first electrode 307 is 0V, and the black charged particles are negatively polarized. A red color resist layer 311 is disposed on the reflective electrode 301, a green color resist layer 312 is disposed on the reflective electrode 302, a blue color resist layer 313 is disposed on the reflective electrode 303, and the reflective electrode 304 does not have a color resist layer but directly contacts the electronic ink layer 306. In this specific example, the display method of the electronic paper display panel includes:

[0078] like Figure 4 As shown, by applying a negative voltage to the reflective electrodes 301, 302, 303, and 304, black charged particles accumulate on the first electrode 307. Since the reflective electrodes 301, 302, 303, and 304 cannot reflect ambient light, the pixel unit displays black, or, as... Figure 5 As shown, by applying a positive voltage to the reflective electrodes 301, 302, 303 and 304, black charged particles are made to gather on the reflective electrodes 301, 302, 303 and 304. The reflective electrodes 301, 302, 303 and 304 cannot reflect ambient light, so that the pixel unit displays black.

[0079] like Figure 6 As shown, by applying a positive voltage to reflective electrodes 302, 303, and 304, black charged particles accumulate on reflective electrodes 302, 303, and 304. Reflective electrode 301 can reflect ambient light, enabling the pixel unit to display a high-saturation red. Figure 7 As shown, by applying a positive voltage to the reflective electrodes 302 and 303, black charged particles are made to gather on the reflective electrodes 302 and 303. The reflective electrodes 301 and 304 can reflect ambient light, so that the pixel unit displays a low saturation red.

[0080] like Figure 8 As shown, by applying a positive voltage to reflective electrodes 301, 303, and 304, black charged particles accumulate on reflective electrodes 301, 303, and 304. Reflective electrode 302 can reflect ambient light, enabling the pixel unit to display a high-saturation green. Figure 9 As shown, by applying a positive voltage to the reflective electrodes 301 and 303, black charged particles are made to gather on the reflective electrodes 301 and 303. The reflective electrodes 302 and 304 can reflect ambient light, so that the pixel unit can display a low saturation green.

[0081] like Figure 10As shown, by applying a positive voltage to reflective electrodes 301, 302, and 304, black charged particles accumulate on reflective electrodes 301, 302, and 304. Reflective electrode 303 can reflect ambient light, enabling the pixel unit to display a high-saturation blue color. Figure 11 As shown, by applying a positive voltage to the reflective electrodes 301 and 302, black charged particles are made to gather on the reflective electrodes 301 and 302. The reflective electrodes 303 and 304 can reflect ambient light, so that the pixel unit can display a low saturation blue.

[0082] It is understood that the projected area of ​​the reflective electrode 304 on the first substrate 321 can be larger than, or equal to or smaller than, the projected areas of the reflective electrodes 301, 302, and 303 on the first substrate 321. A smaller projected area of ​​the reflective electrode 304 on the first substrate 321 has less impact on the saturation of the displayed pure color. For example... Figure 2 and Figure 3 As shown, the projected area of ​​the reflective electrode 304 on the first substrate 321 is approximately equal to the projected area of ​​the reflective electrodes 301, 302 and 303 on the first substrate 321.

[0083] like Figure 12 As shown, by applying a positive voltage to reflective electrodes 301, 302, and 303, black charged particles accumulate on reflective electrodes 301, 302, and 303, and reflective electrode 304 can reflect ambient light, enabling the pixel unit to display white in the first grayscale. By designing the ratio of the projected area of ​​reflective electrodes 301, 302, and 303 on the first substrate 321 and the thickness of the red color resist layer 311, green color resist layer 312, and blue color resist layer 313, it is possible to achieve a pixel unit displaying white when all reflective electrodes 301, 302, and 303 can reflect ambient light. In this case, as shown... Figure 13 As shown, by applying a positive voltage to the reflective electrode 304, black charged particles gather on the reflective electrode 304. The reflective electrodes 301, 302 and 303 can all reflect ambient light, so that the pixel unit displays white in the second gray level. The second gray level is designed to be different from the first gray level.

[0084] In addition to displaying black, high-saturation red, low-saturation red, high-saturation green, low-saturation green, high-saturation blue, low-saturation blue, and white with two grayscale levels, as described above, the electronic paper display panel in this specific example can also display a combination color consisting of any two of the three colors red, green, and blue with high and low saturation. For example, by applying a positive voltage to reflective electrodes 301 and 304, black charged particles gather on reflective electrodes 301 and 304, and reflective electrodes 302 and 303 can reflect ambient light, thus enabling the pixel unit to display a high-saturation blue-green combination color; by applying a positive voltage to reflective electrode 301, black charged particles gather on reflective electrode 301, and reflective electrodes 302, 303, and 304 can reflect ambient light, thus enabling the pixel unit to display a low-saturation blue-green combination color.

[0085] In one possible implementation, multiple second electrodes are disposed on a first color resist layer, multiple second electrodes are disposed on a second color resist layer, and multiple second electrodes are disposed on a third color resist layer. This enables a color display with adjustable brightness. For example, suppose... Figure 3 The reflective electrode 301 shown is formed as two independent reflective sub-electrodes, and a red color resist layer is provided on the two reflective sub-electrodes. By making both reflective sub-electrodes reflect ambient light, the pixel unit can display a higher brightness red, and by making only one of the two reflective sub-electrodes reflect ambient light, the pixel unit can display a lower brightness red.

[0086] In one possible implementation, the projected areas of multiple second electrodes with first color resist layers on the first substrate are the same, the projected areas of multiple second electrodes with second color resist layers on the first substrate are the same, and the projected areas of multiple second electrodes with third color resist layers on the first substrate are the same. This facilitates control over the brightness of the color display. For example, suppose... Figure 3 The reflective electrode 301 shown is formed as two independent reflective sub-electrodes, and the two reflective sub-electrodes have the same orthogonal projection area on the first substrate 321.

[0087] In one possible implementation, the plurality of second electrodes are not provided with a color resist layer. This allows for color displays with various saturations and white displays with adjustable grayscale. For example, suppose... Figure 3The reflective electrode 304 shown is formed as two independent reflective sub-electrodes, and neither of the two reflective sub-electrodes is provided with a color resist layer. Therefore, by making both the reflective electrode 301 and the two reflective sub-electrodes reflect ambient light, the pixel unit can display a lower saturation red. By making both the reflective electrode 301 and one of the reflective sub-electrodes reflect ambient light, the pixel unit can display a higher saturation red. Alternatively, by making both reflective electrodes reflect ambient light, the pixel unit can display a first grayscale white. By making only one of the two reflective sub-electrodes reflect ambient light, the pixel unit can display a white of another grayscale level smaller than the first grayscale.

[0088] In one possible implementation, the projected areas of multiple second electrodes without color resist layers on the first substrate are identical. This facilitates control over the saturation of color displays and the grayscale of white displays. For example, assuming... Figure 3 The reflective electrode 304 shown is formed as two independent reflective sub-electrodes, and the two reflective sub-electrodes have the same orthogonal projection area on the first substrate 321.

[0089] Another embodiment of the present invention provides a driving method for driving the electrons provided in the above embodiments to a display panel, the method comprising:

[0090] Based on the acquired display data, a driving voltage is applied to the second electrode, such that:

[0091] At least one of the black charged particles in the pixel unit moves to gather at the first electrode or at all the second electrodes, so that the pixel unit displays black; or

[0092] At least one of the black charged particles in the pixel unit moves to accumulate on the second electrode where a color resist layer is partially disposed, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes where color resist layers are disposed; or

[0093] At least one of the black charged particles in the pixel unit moves to accumulate on both the second electrode with a partial color resist layer and the second electrode without a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes with color resist layers; or

[0094] At least one of the black charged particles in the pixel unit moves to accumulate on all the second electrodes on which the color resist layer is disposed, so that the pixel unit displays white; or

[0095] At least one of the black charged particles in the pixel unit moves to gather on the second electrode, which is at least partially free of a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

[0096] Another embodiment of the present invention provides an electronic paper display device, including the electronic paper display panel provided in the above embodiment. The electronic paper display device can be any product or component with display function, such as an e-reader, billboard, or electronic tag; this embodiment does not limit this.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. An electronic paper display panel, characterized in that, The device includes a first substrate, a second substrate, and a pixel defining portion located between the first substrate and the second substrate. The pixel defining portion defines a plurality of pixel units. Each pixel unit includes an electronic ink layer located between the first substrate and the second substrate. The electronic ink layer includes black charged particles. The first substrate includes a first substrate and a reflective layer disposed on the first substrate. The second substrate includes a second substrate and a first electrode disposed on the second substrate. At least one of the pixel units includes a plurality of second electrodes disposed on the reflective layer. At least a portion of the second electrodes have a color resist layer disposed on the side facing or away from the first substrate. At least one of the second electrodes is not provided with a color resist layer; The black charged particles are also configured as follows: Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode with a partial color resist layer and the second electrode without a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the other second electrodes with color resist layers. Driven by the first electrode and the second electrode, the pixels move to converge on all the second electrodes on which the color resist layer is disposed, thereby achieving a white display state for the pixel unit. Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which at least partially lacks a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

2. The electronic paper display panel according to claim 1, characterized in that, The black charged particles are configured as follows: Driven by the first electrode and the second electrode, the pixel unit moves to focus on the first electrode or on all the second electrodes, thereby enabling the pixel unit to display black. or Driven by the first electrode and the second electrode, the pixels move to converge on the second electrode, which is partially provided with a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes provided with color resist layers.

3. The electronic paper display panel according to claim 1, characterized in that, The color resist layer includes a first color resist layer, a second color resist layer and a third color resist layer, wherein at least one second electrode is provided with the first color resist layer, at least one second electrode is provided with the second color resist layer, and at least one second electrode is provided with the third color resist layer.

4. The electronic paper display panel according to claim 3, characterized in that, Multiple second electrodes are provided with a first color resist layer, multiple second electrodes are provided with a second color resist layer, and multiple second electrodes are provided with a third color resist layer.

5. The electronic paper display panel according to claim 4, characterized in that, Multiple second electrodes with first color resist layers have the same projected area on the first substrate, multiple second electrodes with second color resist layers have the same projected area on the first substrate, and multiple second electrodes with third color resist layers have the same projected area on the first substrate.

6. The electronic paper display panel according to claim 1, characterized in that, At least one of the pixel units has multiple second electrodes arranged in a matrix or column.

7. The electronic paper display panel according to claim 1, characterized in that, At least one of the pixel units includes a plurality of reflective electrodes disposed on the first substrate, the reflective electrodes being multiplexed as the reflective layer and the second electrode, and the color resist layer being disposed on the side of the reflective electrodes away from the first substrate.

8. The electronic paper display panel according to claim 1, characterized in that, The pixel delimiting portion is disposed between adjacent pixel units, and no pixel delimiting portion is disposed within the pixel unit.

9. The electronic paper display panel according to claim 1, characterized in that, The first substrate further includes a driving circuit layer, which includes a plurality of thin-film transistors that are connected one-to-one with the plurality of second electrodes.

10. An electronic paper display device, characterized in that, Includes an electronic paper display panel as described in any one of claims 1-9.

11. A driving method, characterized in that, The method for driving an electronic paper display panel as described in any one of claims 1-9 includes: Based on the acquired display data, a driving voltage is applied to the second electrode, such that: At least one of the black charged particles in the pixel unit moves to gather at the first electrode or at all the second electrodes, thereby enabling the pixel unit to display a black display state. At least one of the black charged particles in the pixel unit moves to gather on the second electrode where a color resist layer is partially disposed, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the other second electrodes where a color resist layer is disposed. At least one of the black charged particles in the pixel unit moves to gather on the second electrode with a partial color resist layer and the second electrode without a color resist layer, so that the pixel unit displays the color corresponding to the color resist layer of the other second electrodes with color resist layers. At least one of the black charged particles in the pixel unit moves to gather at all the second electrodes on which the color resist layer is disposed, so that the pixel unit displays a white display state. At least one of the black charged particles in the pixel unit moves to gather on the second electrode, which is at least partially free of a color resist layer, thereby enabling the pixel unit to display the color corresponding to the color resist layer of the second electrode, which is provided with a color resist layer.

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