Display module and electronic paper

Abstract

The present invention belongs to the technical field of electronic paper, and in particular to a display module and electronic paper. The display module includes: a base layer made of an opaque material, a color filter layer arranged on the base layer, and a color adjustment component connected to the color filter layer, the color filter layer includes a black matrix layer and a plurality of color resist units arranged on the base layer, the black matrix layer is provided with a plurality of positioning holes, each positioning hole is provided with a color resist unit, at least two color resist units have different colors, and any color resist unit is correspondingly provided with a color adjustment component, and each color adjustment component is used to adjust the external display chromaticity of each color resist unit. The display module of the present invention can display high color chromaticity, and can display the picture clearly by utilizing ambient light without backlight, which can save a lot of power consumption, increase the display quantity of color chromaticity, and also improve the display contrast.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic paper, and in particular relates to a display module and electronic paper. Background Art

[0002] At present, electronic paper display technology has been widely used in commercial applications. Black and white electronic paper screens can be seen everywhere, and they are very popular because of their advantages such as energy saving, anti-glare and clear readability. However, most of the existing mainstream commercial electronic paper products are limited to black and white display, and only a small number of three-color electronic paper have been launched, and most of them use electrophoresis technology.

[0003] However, the main drawback of the electrophoretic electronic paper is that each pixel can only display a limited two or three states of color, the color reproduction capability is poor, and the display effect is not good. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a display module, aiming to solve the problem of how to improve display effect and reduce energy consumption.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a display module is provided, comprising: a base layer made of an opaque material, a color filter layer arranged on the base layer, and a color adjustment component connected to the color filter layer, wherein the color filter layer comprises a black matrix layer and a plurality of color resist units arranged on the base layer, the black matrix layer is provided with a plurality of positioning holes, each of the positioning holes is provided with the color resist unit, at least two of the color resist units have different colors, any of the color resist units is correspondingly provided with the color adjustment component, and each of the color adjustment components is respectively used to adjust the external display chromaticity of each of the color resist units.

[0007] In some embodiments, the color adjustment component includes a magnetic fluid layer made of opaque material, a driving member capable of generating a magnetic field and used to control the movement of the magnetic fluid layer, and a controller for controlling the magnetic field strength of the driving member, wherein the driving member drives the magnetic fluid layer to move to adjust the coverage area of ​​the magnetic fluid layer covering the color resistance unit.

[0008] In some embodiments, the driving member is a first coil formed by spirally winding a wire and in a planar shape. The first coil is arranged relative to the color display surface of the color resistance unit. The first coil has a first power connection point and a second power connection point. The first power connection point and the second power connection point are respectively located at the two end points of the wire, and the first power connection point is located at the center position of the first coil.

[0009] In some embodiments, the first coil further has a third power connection point, and the third power connection point is located between the first power connection point and the second power connection point.

[0010] In some embodiments, the color adjustment component further includes a first receiving shell made of a transparent material and arranged opposite to the color resistance unit, and the first receiving shell has a first receiving cavity for receiving the magnetic fluid layer.

[0011] In some embodiments, the first receiving shell protrudes toward the color resistance unit and the color resistance unit is recessed in a direction away from the first receiving cavity, and the first coil is recessed in a direction that is the same as the recessed direction of the color resistance unit.

[0012] In some embodiments, the color adjustment component further includes a reflective layer disposed on the first receiving shell, and the reflective layer is used to reflect external light to the color resistance unit.

[0013] In some embodiments, the driving member is an electromagnet located in the black matrix layer, and the electromagnet has a second coil, which is spirally wound along the circumference of the fixed axis and extends along the axial direction of the fixed axis. The axial direction of the fixed axis is parallel to the base layer, and the black matrix layer is provided with a accommodating hole corresponding to the position of the driving member. A portion of the magnetic fluid layer is stored in the accommodating hole, and another portion of the magnetic fluid layer covers the color resistance unit. The driving member drives the magnetic fluid layer to flow from the accommodating hole to the color resistance unit, or drives the magnetic fluid layer to flow from the color resistance unit into the accommodating hole.

[0014] In some embodiments, the color adjustment component further includes a second receiving shell made of a transparent material, the second receiving shell covers the color resistance unit and has a second receiving cavity for receiving the magnetic fluid layer, and the second receiving cavity is connected to the receiving hole.

[0015] In a second aspect, an electronic paper is provided, which includes the display module.

[0016] The beneficial effects of this application are:

[0017] The display module includes a base layer, a color film layer and a color adjustment component. The color film layer includes a black matrix layer and multiple color resist units. Each color adjustment component controls and adjusts each color resist unit respectively, so that the human eye can see color resist units with different display chromaticities, and finally the display module can display high color chromaticity. The picture can be displayed clearly only by utilizing ambient light without backlight, which can save a lot of power consumption, increase the number of color chromaticities displayed, and also improve the display contrast. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the structural principle of a display module provided in an embodiment of the present application;

[0020] Figure 2 yes Figure 1 A schematic diagram of the principle of the first coil of the display module;

[0021] Figure 3 is a schematic diagram of the structural principle of a display module provided by another embodiment of the present application;

[0022] Figure 4 yes Figure 3 Schematic diagram of the principle of the magnetic fluid layer of the display module in the aggregation and contraction state;

[0023] Figure 5 is a schematic diagram of the structural principle of a display module provided by another embodiment of the present application;

[0024] Figure 6 yes Figure 5 A schematic diagram of the three-dimensional structure of the second coil;

[0025] Figure 7 It is a schematic diagram of the structural principle of a display module provided in yet another embodiment of the present application.

[0026] Among them, the reference numerals in the figure are:

[0027] 10. Base layer; 20. Color film layer; 21. Black matrix layer; 22. Color resistance unit; 30. Color adjustment component; 31. Electromagnet; 32. Magnetic fluid layer; 41. Second receiving shell; 42. Second receiving cavity; 211. Positioning hole; 43. Accommodating hole; 51. First receiving shell; 511. First receiving cavity; 60. First coil; 311. Second coil; 61. First power connection point; 62. Second power connection point; 63. Third power connection point; 53. Reflective layer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present application.

[0029] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] See also Figures 1 to 3 , an embodiment of the present application provides a display module and an electronic paper having the same.

[0031] The display module includes a base layer 10 , a color filter layer 20 and a color adjustment component 30 .

[0032] The base layer 10 is made of a light-proof material to prevent light leakage.

[0033] The color filter layer 20 is flatly arranged on the base layer 10, and the base layer 10 provides support for the color filter layer 20. The color adjustment component 30 is connected to the color filter layer 20.

[0034] See also Figures 1 to 3 The color filter layer 20 includes a black matrix layer 21 and a plurality of color resist units 22 disposed on the base layer 10. It can be understood that the black matrix layer 21 is also made of an opaque material. The black matrix layer 21 is provided with a plurality of positioning holes 211, and each positioning hole 211 is arranged in an array at intervals. A color resist unit 22 is disposed in each positioning hole 211, and at least two color resist units 22 have different colors. A color adjustment component 30 is correspondingly disposed in any color resist unit 22, and each color adjustment component 30 is used to adjust the external display chromaticity of each color resist unit 22.

[0035] See also Figures 1 to 3 The display chromaticity represents the hue and purity displayed by the color resist unit 22. The display chromaticity of the color resist unit 22 seen by the human eye can be adjusted through the color adjustment component 30. For example, the color adjustment component 30 can block part of the light or block part of the display area of ​​the chromaticity unit, so that the display chromaticity seen by the human eye can be from a pure color to a variety of intermediate gradient transition colors. The combination of multiple color resist units 22 can achieve a display effect with high color reproduction and smooth gradient transition.

[0036] The color resist unit 22 can realize color display of the display module. The color resist unit 22 is arranged in the positioning hole 211 opened in the black matrix layer 21, which helps to improve the contrast and color separation of the display. The color resist unit 22 usually includes three basic colors: red, green and blue, and rich color display can be realized by combining them.

[0037] See also Figures 1 to 3 In some embodiments, the color resist unit 22 is optionally an opaque color resist unit. The color resist unit 22 is set to be opaque, which helps to improve the saturation and contrast of the color. Each color resist unit 22 is correspondingly provided with a color adjustment component 30, which can adjust the external display chromaticity of the color resist unit 22 to achieve dynamic color adjustment. The surface of the color resist unit 22 is the color display surface, which is the part that can be directly seen by the human eye. The color adjustment component 30 adjusts the display chromaticity by controlling the area covering the color display surface. The color resist units 22 in the electronic paper do not require a backlight source, and they use ambient light to achieve display, which greatly reduces energy consumption. By finely setting and arranging the color resist units 22, high-resolution color display can be achieved. Through the precise control of the color adjustment component 30, the color resist unit 22 can be displayed from a pure color to a variety of intermediate gradient transition colors, which improves the color reproduction and display effect.

[0038] It can be understood that the color resist unit 22 includes a blue color resist unit, a green color resist unit and a red color resist unit, and a plurality of blue color resist units 22, a plurality of green color resist units 22 and a plurality of red color resist units 22 are provided on the black matrix layer 21. Through the combination of each red color resist unit 22, each green color resist unit 22 and each blue color resist unit 22, and then through the color adjustment of each color adjustment component 30, different colored patterns and information can be displayed externally, thereby improving the display effect.

[0039] See also Figures 1 to 3 The display module provided in this embodiment includes a base layer 10, a color filter layer 20 and a color adjustment component 30. The color filter layer 20 includes a black matrix layer 21 and a plurality of color resist units 22. Through the control and color adjustment of each color resist unit 22 by each color adjustment component 30, the human eye can see the color resist unit 22 with different display chromaticity, and finally the display module can display high color chromaticity, and only needs to use ambient light without backlight to make the picture clearly displayed, which can save a lot of power consumption, increase the display amount of color chromaticity, and also improve the display contrast.

[0040] See also Figure 1 to Figure 2 The opaque material of the base layer 10 can be a black plastic sheet, such as a black reinforced plastic sheet such as polycarbonate, polyethylene terephthalate, acrylonitrile-butadiene-styrene, etc. It can also be a black glass plate, which is a black opaque glass plate made by adding a colorant such as iron oxide or cobalt oxide to the glass. There is no limitation here and it can be selected according to actual conditions.

[0041] See also Figure 1 to Figure 2 In some embodiments, the color adjustment component 30 includes a magnetic fluid layer made of opaque material, a driving member capable of generating a magnetic field and used to control the movement of the magnetic fluid layer, and a controller for controlling the magnetic field strength of the driving member. The magnetic fluid layer covers the color-developing surface of the color-resistance unit 22, and the driving member drives the magnetic fluid layer to move to adjust the coverage area of ​​the color-developing surface covered by the magnetic fluid layer. The color-developing surface refers to the surface of the color-resistance unit 22 that can be directly seen by the human eye when there is no magnetic fluid layer covering the color-resistance unit 22. At this time, the color of the color-developing surface is the color of the color-resistance unit 22.

[0042] See also Figure 1 to Figure 2 It can be understood that the color of the magnetic fluid layer can be black, which can prevent light from passing through the magnetic fluid layer. When the coverage area is smaller, the displayed chromaticity of the color resistance unit 22 is closer to its own pure color. When the coverage area is larger, the displayed chromaticity becomes weaker. When the magnetic fluid layer completely covers the color resistance unit 22, the human eye sees the color of the magnetic fluid layer, that is, black, and the human eye cannot see the color of the color resistance unit 22 itself.

[0043] See also Figure 1 to Figure 2 Optionally, each color resist unit 22 is located in each sub-pixel, and the size of the coverage area is adjusted by moving the magnetic fluid layer, so that the blocking degree of the color resist unit 22 in each sub-pixel can be finely controlled, thereby simulating different color depths and transitional tones, and realizing a continuously gradient multi-level chromaticity display, thereby achieving a richer, more natural and realistic color display effect, greatly improving the color reproduction ability of electronic paper, and expanding the application field of electronic paper.

[0044] See also Figure 2 In some embodiments, the driving member is a first coil 60 formed by spirally winding a wire and in a planar shape. The first coil 60 is arranged relative to the color display surface of the color resistance unit 22. The first coil 60 has a first connection point 61 and a second connection point 62. The first connection point 61 and the second connection point 62 are respectively located at the two ends of the wire, and the first connection point 61 is located at the center of the first coil 60. The first coil 60 can be formed by spirally winding a single wire, and the first connection point 61 and the second connection point 62 are respectively connected to the anode and cathode of the power supply.

[0045] See also Figure 1 to Figure 2Optionally, the planar first coil 60 is directly opposite to the color-resistance unit 22, and can be located above or below the color-resistance unit 22. By increasing the current of the first coil 60, the magnetic field intensity at the central axis of the first coil 60 can be enhanced. Since the magnetic fluid of the magnetic fluid layer 32 tends to the area with higher magnetic field intensity, the magnetic fluid moves to the central area of ​​the first coil 60 and gathers at the central axis position of the first coil 60. Since the magnetic fluid layer 32 is in a contracted state at this time, the other positions of the color-resistance unit 22 except the central position are not covered by the magnetic fluid layer 32, so that the corresponding color can be displayed.

[0046] By reducing the current or maintaining a moderate current intensity, a relatively uniform magnetic field distribution can be generated on the surface of the entire first coil 60. At this time, the magnetic force on the magnetic fluid is small and will not be concentrated in a specific area, but will be relatively evenly distributed on the surface of the entire first coil 60 and completely cover the color resistance unit 22, and the sub-pixel is displayed in black.

[0047] See also Figure 1 to Figure 2 , the first coil 60 is arranged below the color resist unit 22, so that the first coil 60 can prevent the light from being incident on the color resist unit 22. In order to enhance the magnetic control degree of the first coil 60, the thickness of the color resist can be reduced accordingly, or the first coil 60 can be embedded in the middle and lower part of the color resist. Alternatively, the first coil 60 made of transparent conductive material can be used, and the first coil 60 can be directly arranged above the magnetic fluid layer 32, and there is no need to separate the magnetic fluid layer 32 and the first coil 60 from the color resist unit 22 of a certain thickness.

[0048] See also Figure 1 to Figure 2 , and the magnetic field strength can be adjusted by controlling the spacing, radius, and number of turns of the first coil 60, so that the distribution of the magnetic fluid can be well controlled in both display states. Moreover, the first coil 60 is arranged directly opposite to the chromaticity unit, which is conducive to reducing the spacing between adjacent color resistance units 22, and can increase the entire color resistance area, increase pixel density, and improve color display effects.

[0049] See also Figure 1 to Figure 2 In some embodiments, the first coil 60 further has a third connection point 63 , and the third connection point 63 is located between the first connection point 61 and the second connection point 62 .

[0050] See also Figure 1 to Figure 2 Optionally, a third connection point 63 is also provided in the middle of the first coil 60 and connected to the control circuit below. When displaying black, the first connection point 61 and the second connection point 62 are connected to the anode and the cathode respectively, and the third connection point 63 is disconnected from the control circuit below. At this time, the entire first coil 60 is supplied with a small current to make the magnetic field evenly distributed.

[0051] See also Figure 1 to Figure 2 When displaying colors, the first power connection point 61 and the third power connection point 63 are connected to the anode and the cathode respectively, and the second power connection point 62 is disconnected from the control circuit below it. That is, at this time, the inner circle of the first coil 60 works, while the outer circle of the first coil 60 does not work, and the magnetic fluid gathers at the central axis of the inner circle of the first coil 60, while the outer circle of the first coil 60 does not gather the magnetic fluid.

[0052] See also Figure 1 to Figure 2 In some embodiments, the color adjustment component 30 further includes a first receiving shell 51 made of a transparent material and arranged opposite to the color resistance unit 22 , and the first receiving shell 51 has a first receiving cavity 511 for receiving the magnetic fluid layer 32 .

[0053] See also Figure 1 to Figure 2 Optionally, the shape of the first receiving shell 51 is adapted to the cross-sectional shape of the positioning hole 211, so that the first receiving shell 51 can be placed in the positioning hole 211 and positioned through the positioning hole 211. The first coil 60 can control the magnetic fluid layer 32 to gather or expand in the first receiving cavity 511 by changing its own magnetic field strength, thereby achieving adjustment of the coverage area.

[0054] Optionally, the first receiving shell 51 made of a transparent material is used to protect and control the movement of the magnetic fluid layer 32 , while ensuring that light can pass through the first receiving shell 51 to reach the color display surface of the color resistance unit 22 .

[0055] See also Figure 3 to Figure 4 In some embodiments, the first receiving shell 51 protrudes toward the color resist unit 22 and the color resist unit 22 is recessed in a direction away from the first receiving cavity 511 , the first coil 60 is a recessed first coil 60 and the recessed direction is the same as the recessed direction of the color resist unit 22 .

[0056] See also Figure 3 to Figure 4 Optionally, the surface of the first receiving shell 51 facing the color resistance unit 22 protrudes into the color resistance unit 22, so that when displaying in color, the central axis area of ​​the first receiving cavity 511 has a larger space for accommodating the magnetic fluid, which can reduce the aggregation area of ​​the magnetic fluid layer 32 and improve the color display effect.

[0057] See also Figure 3 to Figure 4 Moreover, since the color display surface of the color resistance unit 22 is an arc surface, its color display area is also larger, which improves the color display effect. The first coil 60 is concave, and the center position of its spiral is lower than the edge position of the spiral. The magnetic field is gathered at the center position, thereby improving the magnetic control ability of the magnetic fluid layer 32.

[0058] See also Figure 3 to Figure 4In some embodiments, the color adjustment assembly 30 further includes a reflective layer 53 disposed on the first receiving shell 51, and the reflective layer 53 is used to reflect external light to the color resistance unit 22. Optionally, the cross-sectional shape of the reflective layer 53 is a triangle.

[0059] See also Figure 3 to Figure 4 Optionally, the reflective layer 53 is located at the center of the color resist unit 22, and the position is where the magnetic fluid is gathered, so that the reflective layer 53 does not occupy the additional light incident area of ​​the color resist unit 22. The outer surface of the reflective layer 53 can reflect more ambient light to the color resist unit 22. When displaying in color, the light absorbed by the gathered black magnetic fluid balls can be reduced, allowing more light to irradiate the color resist unit 22, so as to improve the color display effect.

[0060] See also Figure 3 to Figure 4 It can be understood that the magnetic field strength of the first coil 60 is increased so that the magnetic fluid layer 32 is gathered into a spherical shape in the first receiving cavity 511 .

[0061] See also Figures 5 to 7 In some embodiments, the driving member is an electromagnet 31 located in the black matrix layer 21. The second coil 311 of the electromagnet 31 is spirally wound along the circumference of the fixed axis and extends along the axial direction of the fixed axis. The axial direction of the fixed axis is parallel to the base layer 10. The black matrix layer 21 is provided with a receiving hole 43 at a position corresponding to the driving member. A portion of the magnetic fluid layer 32 is stored in the receiving hole 43, and another portion of the magnetic fluid layer 32 covers the color resistance unit 22. The driving member drives the magnetic fluid layer 32 to flow from the receiving hole 43 to the color resistance unit 22, or drives the magnetic fluid layer 32 to flow from the color resistance unit 22 into the receiving hole 43.

[0062] See also Figures 5 to 7 Optionally, the second coil 311 of the electromagnet 31 is in the shape of a spiral tube, and both ends of the spiral tube-shaped second coil 311 can be connected to the control circuit on the array substrate below.

[0063] See also Figures 5 to 7 It can be understood that by changing the direction of the current, the second coil 311 of the same electromagnet 31 can generate magnetic fields in opposite directions in different states, thereby attracting or repelling the magnetic fluid in the receiving hole 43, thereby adjusting the area of ​​the color resistance unit 22 covered by the magnetic fluid layer 32. The area of ​​the color resistance unit 22 covered by the magnetic fluid layer 32 can also be adjusted by changing the current intensity to control the magnetic strength of the electromagnet 31.

[0064] See also Figures 5 to 7In some embodiments, the color adjustment component 30 further includes a second receiving shell 41 made of a transparent material, the second receiving shell 41 covers the color resistance unit 22 and has a second receiving cavity 42 for receiving the magnetic fluid layer 32 , and the second receiving cavity 42 is connected to the receiving hole 43 .

[0065] See also Figures 5 to 7 By adapting the shape of the second receiving shell 41 to the cross-sectional shape of the positioning hole 211, the second receiving shell 41 can be placed in the positioning hole 211 and positioned through the positioning hole 211. The electromagnet 31 can control the magnetic fluid to flow from the receiving hole 43 into the second receiving cavity 42, or from the second receiving cavity 42 into the receiving hole 43 through the change of its own magnetic field strength, thereby realizing the adjustment of the coverage area.

[0066] Optionally, the second receiving shell 41 made of a transparent material is used to protect and control the movement of the magnetic fluid layer 32 , while ensuring that light can pass through the second receiving shell 41 to reach the color display surface of the color resistance unit 22 .

[0067] See also Figures 5 to 7 The shape of the second receiving shell 41 is adapted to the cross-sectional shape of the positioning hole 211, which not only simplifies the assembly process, but also ensures the precise positioning of each color adjustment component 30. The connection between the second receiving cavity 42 and the receiving hole 43 provides a channel for the flow of the magnetic fluid, so that the electromagnet 31 can accurately control the distribution of the magnetic fluid by changing the magnetic field strength, thereby changing the area of ​​the magnetic fluid layer 32, thereby achieving fine adjustment of the color resistance unit 22 display chromaticity, while protecting the magnetic fluid from the external environment, and improving the stability and durability of the display module.

[0068] Optionally, the magnetic fluid material of the magnetic fluid layer 32 can be an iron powder-based magnetic fluid, and the magnetic fluid layer 32 is obtained by mixing iron powder particles in a carrier liquid, and the carrier liquid can be mineral oil, silicone oil, etc., and has the characteristics of being opaque and presenting black or dark gray. The iron powder particles are distributed throughout the carrier liquid, so that the flow characteristics of the magnetic fluid layer 32 can be changed under the action of an external magnetic field.

[0069] Optionally, the magnetic field strength of the electromagnet 31 can be controlled by the controller, thereby adjusting the coverage area. That is, the controller can accurately adjust the magnetic field strength generated by the electromagnet 31 by changing the magnitude and direction of the current applied to the electromagnet 31. When the magnetic field strength increases, the magnetic fluid layer 32 will be subjected to a stronger magnetic force and will be attracted from the receiving hole 43 to the vicinity of the electromagnet 31, thereby reducing the area covered on the color-developing surface of the color-resistance unit 22. Conversely, when the magnetic field strength weakens, the magnetic fluid layer 32 will flow from the vicinity of the electromagnet 31 to the color-developing surface of the color-resistance unit 22 under the action of gravity and surface tension, thereby increasing the coverage area.

[0070] See also Figures 5 to 7 In some embodiments, the accommodating hole 43 is opened in the hole wall of the positioning hole 211 and is located above the color display surface.

[0071] Optionally, the height of the color resist unit 22 is smaller than the depth of the positioning hole 211, and the magnetic fluid layer 32 and the color resist unit 22 can be completely accommodated in the positioning hole 211, and the height of the accommodating hole 43 is slightly higher than the height of the color display surface of the color resist unit 22, so as to facilitate the magnetic fluid to flow out of the accommodating hole 43. At the same time, the magnetic fluid can also flow into the color resist unit 22 and be stored in the accommodating hole 43 under the action of the electromagnet 31.

[0072] Optionally, the transparent material may also be transparent glass, or other transparent materials, such as:

[0073] Polycarbonate: It has high transparency, good impact resistance and heat resistance, and is often used in transparent parts of electronic devices.

[0074] Polymethyl methacrylate: It has excellent transparency and weather resistance, is lighter than glass, and has certain flexibility.

[0075] Cyclic olefin copolymer: It has high transparency, low water absorption and good chemical stability, suitable for precision optical parts.

[0076] See also Figures 5 to 7 In some embodiments, the controller includes a control circuit and a plurality of data lines, each of the data lines is connected to the control circuit, and each of the data lines is electrically connected to each of the electromagnets 31 .

[0077] See also Figures 5 to 7 Optionally, the data line can be an IC data line, and the control circuit controls the magnetic field strength of each electromagnet 31 through each data line. For example, if a certain pixel area requires a 50% grayscale, the control circuit controls the data line to transmit a signal (voltage value) to this pixel area, so that the magnetic fluid layer 32 on each sub-pixel of this pixel area blocks half of the color resistance unit 22, thereby achieving a 50% grayscale in the pixel area, and realizing a display screen with multiple color depths, and a good display effect.

[0078] The present invention also proposes an electronic paper, which includes a display module. The specific structure of the display module refers to the above embodiment. Since the electronic paper adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0079] In some embodiments, the electronic paper further includes a housing, and the display module is mounted on the housing.

[0080] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A display module, characterized in that: include: A base layer made of an opaque material, a color filter layer disposed on the base layer, and a color adjustment component connected to the color filter layer, wherein the color filter layer includes a black matrix layer and a plurality of color resist units disposed on the base layer, the black matrix layer is provided with a plurality of positioning holes, each of the positioning holes is provided with the color resist unit, at least two of the color resist units have different colors, any of the color resist units is correspondingly provided with the color adjustment component, and each of the color adjustment components is respectively used to adjust the external display chromaticity of each of the color resist units; The color adjustment component includes a magnetic fluid layer made of opaque material, a driving member capable of generating a magnetic field and used to control the movement of the magnetic fluid layer, and a controller for controlling the magnetic field strength of the driving member, wherein the driving member drives the magnetic fluid layer to move so as to adjust the coverage area of ​​the magnetic fluid layer covering the color resistance unit; The driving member is a first coil formed by spirally winding a wire and in a planar shape. The first coil is arranged relative to the color display surface of the color resistance unit. The first coil has a first power connection point and a second power connection point. The first power connection point and the second power connection point are respectively located at the two end points of the wire, and the first power connection point is located at the center position of the first coil.

2. A display module, characterized in that: include: A base layer made of an opaque material, a color filter layer disposed on the base layer, and a color adjustment component connected to the color filter layer, wherein the color filter layer includes a black matrix layer and a plurality of color resist units disposed on the base layer, the black matrix layer is provided with a plurality of positioning holes, each of the positioning holes is provided with the color resist unit, at least two of the color resist units have different colors, any of the color resist units is correspondingly provided with the color adjustment component, and each of the color adjustment components is respectively used to adjust the external display chromaticity of each of the color resist units; The color adjustment component includes a magnetic fluid layer made of opaque material, a driving member capable of generating a magnetic field and used to control the movement of the magnetic fluid layer, and a controller for controlling the magnetic field strength of the driving member, wherein the driving member drives the magnetic fluid layer to move so as to adjust the coverage area of ​​the magnetic fluid layer covering the color resistance unit; The driving member is an electromagnet located in the black matrix layer, and the electromagnet has a second coil, which is spirally wound along the circumference of the fixed axis and extends along the axial direction of the fixed axis. The axial direction of the fixed axis is parallel to the base layer. The black matrix layer is provided with a accommodating hole corresponding to the position of the driving member, a part of the magnetic fluid layer is stored in the accommodating hole, and another part of the magnetic fluid layer covers the color resistance unit. The driving member drives the magnetic fluid layer to flow from the accommodating hole to the color resistance unit, or drives the magnetic fluid layer to flow from the color resistance unit into the accommodating hole.

3. The display module according to claim 1, wherein: The first coil further has a third power connection point, and the third power connection point is located between the first power connection point and the second power connection point.

4. The display module according to claim 1, wherein: The color adjustment component further includes a first receiving shell made of a transparent material and arranged opposite to the color resistance unit, wherein the first receiving shell has a first receiving cavity for receiving the magnetic fluid layer.

5. The display module according to claim 4, wherein: The first receiving shell protrudes toward the color resistance unit and the color resistance unit is recessed in a direction away from the first receiving cavity. The first coil is recessed in a direction that is the same as the recessed direction of the color resistance unit.

6. The display module according to claim 5, wherein: The color adjustment component further includes a reflective layer disposed on the first receiving shell, and the reflective layer is used to reflect external light to the color resistance unit.

7. The display module according to claim 2, wherein: The color adjustment component further includes a second receiving shell made of a transparent material, the second receiving shell covers the color resistance unit and has a second receiving cavity for receiving the magnetic fluid layer, and the second receiving cavity is connected to the receiving hole.

8. An electronic paper, characterized in that: Comprising a display module as described in any one of claims 1-7.

Images