Light board and display device

Abstract

The present disclosure belongs to the field of display technologies, and particularly relates to a light board and a display device. The light board has a driving substrate, a plurality of light-emitting diodes, and a plurality of electrophoretic units. The light-emitting diodes are arranged in an array on the driving substrate, and the electrophoretic units are disposed between two adjacent light-emitting diodes. Each electrophoretic unit includes a first electrode, a second electrode, and a microcup structure. The microcup structure is located between the first electrode and the second electrode, and the microcup structure is filled with electrophoretic particles. By controlling the voltages on the first electrode and the second electrode, the present disclosure can control the movement of the electrophoretic particles to a target position, so as to utilize the electrophoretic particles to absorb and / or reflect the oblique light rays of the light-emitting diodes, thereby improving the halo problem of the display device and enhancing the display effect of the display device.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of display, and particularly relates to a lamp board and a display device. Background Art

[0002] In a display device, each light-emitting diode is arranged in an array on a driving substrate. Since there are differences in the luminous flux values of each light-emitting angle when the array-type light-emitting diodes emit light, there are differences in the brightness between the gaps of the light-emitting diodes and the brightness at the light-emitting diodes, and the emission spectra at the two places are inconsistent, which easily causes a halo problem, thus resulting in the problem of uneven display brightness of the display device. Summary of the Invention

[0003] The purpose of the present application is to provide a lamp board and a display device, which can improve the halo phenomenon of the display device and enhance the display effect of the display device.

[0004] The present disclosure provides a lamp board, including:

[0005] A driving substrate;

[0006] A plurality of light-emitting diodes, arranged in an array on the driving substrate;

[0007] A plurality of electrophoresis units, arranged in an array on the driving substrate, and the electrophoresis unit is located between two adjacent light-emitting diodes. The electrophoresis unit includes a microcup structure, a first electrode and a second electrode. The microcup structure is filled with electrophoresis particles, and the electrophoresis particles are arranged between the first electrode and the second electrode;

[0008] Wherein, the electrophoresis particles can move to a target position under the control of the first electrode and the second electrode to absorb and / or reflect the oblique light rays of the adjacent light-emitting diodes.

[0009] In an exemplary embodiment of the present disclosure, the electrophoresis particles include first electrophoresis particles and second electrophoresis particles, and the first electrophoresis particles and the second electrophoresis particles can be arranged in two layers in the microcup structure under the control of the first electrode and the second electrode.

[0010] In an exemplary embodiment of the present disclosure, the first electrode is located on the side of the microcup structure close to the driving substrate, and the second electrode is located on the side of the microcup structure far from the driving substrate; the first electrophoresis particles are used for light absorption, and the second electrophoresis particles are used for light reflection, wherein,

[0011] The first electrode and the second electrode are capable of controlling the first electrophoretic particles to move towards the second electrode and the second electrophoretic particles to move towards the first electrode when the ambient light is greater than a set brightness, so that the first electrophoretic particles are located on the side of the second electrophoretic particles away from the driving substrate;

[0012] The first electrode and the second electrode are capable of controlling the first electrophoretic particles to move towards the first electrode and the second electrophoretic particles to move towards the second electrode when the ambient light is less than or equal to the set brightness, so that the first electrophoretic particles are located on the side of the second electrophoretic particles close to the driving substrate.

[0013] In an exemplary embodiment of the present disclosure, the light-emitting diode includes a light-emitting layer, a top electrode, and a bottom electrode. The bottom electrode is located on the side of the light-emitting layer close to the driving substrate, and the top electrode is located on the side of the light-emitting layer away from the driving substrate,

[0014] wherein, the first electrode is arranged on the same layer as the bottom electrode, and the second electrode is arranged on the same layer as the top electrode.

[0015] In an exemplary embodiment of the present disclosure, the first electrode and the second electrode are located at opposite ends of the microcup structure in the horizontal direction, and the first electrode and the second electrode are light-transmitting electrodes;

[0016] wherein, the first electrophoretic particles and the second electrophoretic particles can be horizontally arranged in two layers in the microcup structure under the control of the first electrode and the second electrode.

[0017] In an exemplary embodiment of the present disclosure, when the light colors of two adjacent light-emitting diodes are different, the first electrophoretic particles have the same color as the light of one adjacent light-emitting diode, and the second electrophoretic particles have the same color as the light of the other adjacent light-emitting diode. Under the control of the first electrode and the second electrode, the first electrophoretic particles and the second electrophoretic particles move towards the direction of the light-emitting diode with the same color as them respectively.

[0018] In an exemplary embodiment of the present disclosure, the first electrode and the second electrode are inclined with respect to the perpendicular line of the driving substrate, and the tops of the first electrode and the second electrode are inclined towards each other or away from each other.

[0019] In an exemplary embodiment of the present disclosure, the first electrophoretic particles are black electrophoretic particles, and the second electrophoretic particles are white electrophoretic particles.

[0020] In an exemplary embodiment of the present disclosure, the electrophoretic particles include single black electrophoretic particles or single white electrophoretic particles; and / or

[0021] The height of the electrophoretic unit is greater than the height of the light-emitting diode; and / or

[0022] There is a gap between the electrophoretic unit and the adjacent light-emitting diode, and the width of the gap is less than 1 / 4 of the distance between two adjacent light-emitting diodes.

[0023] The present disclosure provides a display device, which includes a control chip and any one of the above-mentioned lamp boards. The control chip is electrically connected to the driving substrate to control the light-emitting diode to emit light through the driving substrate and control the movement of the electrophoretic particles.

[0024] The solution of the present application has the following beneficial effects:

[0025] In the present disclosure, an electrophoretic unit is arranged between adjacent light-emitting diodes. By controlling the voltages on the first electrode and the second electrode in the electrophoretic unit, the movement of the electrophoretic particles in the electrophoretic unit can be controlled to move to the target position, so as to absorb and / or reflect the oblique light of the light-emitting diode by the electrophoretic particles, thereby improving the halo problem of the display device and improving the display effect of the display device.

[0026] Other characteristics and advantages of the present application will become apparent through the following detailed description, or will be learned in part through the practice of the present application.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic cross-sectional structure diagram of the first electrophoretic particles and the second electrophoretic particles scattered in the microcup structure in the embodiment of the present disclosure.

[0030] Figure 2 It is a schematic cross-sectional structure diagram of the first electrophoretic particles and the second electrophoretic particles arranged vertically in two layers in the microcup structure in the embodiment of the present disclosure.

[0031] Figure 2aSchematic cross-sectional structure diagram of forming a first electrode and a bottom electrode on a driving substrate in an embodiment of the present disclosure.

[0032] Figure 2b For forming Figure 2a Schematic cross-sectional structure diagram of forming a light-emitting layer on the bottom electrode of.

[0033] Figure 2c For forming Figure 2b Schematic cross-sectional structure diagram of forming a microcup structure on the first electrode of.

[0034] Figure 2d For forming Figure 2c Schematic cross-sectional structure diagram of forming a top electrode and a second electrode on the basis of.

[0035] Figure 3 Schematic cross-sectional structure diagram of the electrophoretic particles being single black electrophoretic particles in an embodiment of the present disclosure.

[0036] Figure 4 Schematic cross-sectional structure diagram of the electrophoretic particles being single white electrophoretic particles in an embodiment of the present disclosure.

[0037] Figure 5 Schematic cross-sectional structure diagram of the first electrophoretic particles and the second electrophoretic particles being horizontally arranged in two layers in a microcup structure in an embodiment of the present disclosure.

[0038] Figure 6 Schematic cross-sectional structure diagram of the first electrode and the second electrode being inclined with respect to the perpendicular line of the driving substrate in an embodiment of the present disclosure.

[0039] Figure 6a For Figure 6 Enlarged schematic diagram of the structure at the dashed box in.

[0040] Figure 7 Schematic cross-sectional structure diagram of the first electrode and the second electrode being inclined with respect to the perpendicular line of the driving substrate in another embodiment of the present disclosure.

[0041] Figure 7a For Figure 7 Enlarged schematic diagram of the structure at the dashed box in.

[0042] Explanation of reference numerals:

[0043] 1. Lamp board;

[0044] 11. Driving substrate;

[0045] 12. Light-emitting diode; 121. Bottom electrode; 122. Light-emitting layer; 123. Top electrode;

[0046] 13. Electrophoresis unit; 131. Microcup structure; 132. First electrode; 133. Second electrode; 134a. White electrophoresis particles; 134b. Black electrophoresis particles; 134c. Red electrophoresis particles; 134d. Green electrophoresis particles; 134e. Blue electrophoresis particles;

[0047] X. Horizontal direction; Y. Vertical direction. Detailed implementation manners

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

[0049] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be used. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

[0050] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0051] As Figures 1 to 7 shown, an embodiment of the present disclosure provides a lamp board 1, which can be applied to a display device. The lamp board 1 of this embodiment may include a driving substrate 11, a plurality of light-emitting diodes 12, and a plurality of electrophoresis units 13. The light-emitting diodes 12 are arranged in an array on the driving substrate 11. The light-emitting diodes 12 can be understood as point light sources. The electrophoresis units 13 are arranged in an array on the driving substrate 11, and the electrophoresis units 13 are located between two adjacent light-emitting diodes 12.

[0052] It should be understood that in other embodiments, not only can electrophoresis units 13 be provided between adjacent light-emitting diodes 12, but also electrophoresis units 13 can be provided between the light-emitting diodes 12 near the edge of the driving substrate 11 and the edge of the driving substrate 11. In other words, it can also be understood that electrophoresis units 13 can be provided around the light-emitting diodes 12.

[0053] Among them, the electrophoresis unit 13 may include a microcup structure 131, a first electrode 132, and a second electrode 133. The microcup structure 131 is filled with electrophoresis particles, and the electrophoresis particles are disposed between the first electrode 132 and the second electrode 133. These electrophoresis particles can move in the space within the microcup structure 131 under the drive of the first electrode 132 and the second electrode 133.

[0054] In this embodiment, the electrophoresis particles in the microcup structure 131 can be single electrophoresis particles or a mixture of multiple electrophoresis particles. For specific details, reference can also be made to the description in the subsequent embodiments, and no further elaboration will be provided here.

[0055] In the embodiments of the present disclosure, the electrophoresis particles can absorb and / or reflect light. By controlling the voltage on the first electrode 132 and the second electrode 133, the electrophoresis particles can be controlled to move to the target position and absorb and / or reflect the obliquely incident light of the adjacent light-emitting diode 12, so as to improve the halo problem of the display device.

[0056] As Figure 2 shown, there is a gap between the electrophoresis unit 13 and the adjacent light-emitting diode 12 in the embodiments of the present disclosure. The width of the gap is defined as D, and the width D of the gap can be greater than 5um. By providing a gap between the electrophoresis unit 13 and the adjacent light-emitting diode 12, space can be reserved for the wiring for powering the electrophoresis unit 13 and the wiring for powering the light-emitting diode 12. The wiring for powering the electrophoresis unit 13 and the wiring for powering the light-emitting diode 12 are independent of each other, which can reduce the possibility of mutual interference between the electric fields on the light-emitting diode 12 and the electrophoresis unit 13, thereby improving the stability of the display device during operation. In addition, the width D of the gap is less than 1 / 4 of the distance between two adjacent light-emitting diodes 12 to reserve sufficient space for arranging the electrophoresis unit 13.

[0057] As Figure 4 shown, in the embodiments of the present disclosure, the height of the electrophoresis unit 13 is greater than the height of the light-emitting diode 12 to strengthen the blocking of the obliquely incident light of the light-emitting diode 12 by the electrophoresis unit 13, thereby improving the halo problem of the display device.

[0058] Furthermore, the height of the electrophoresis unit 13 can be at least twice the height of the light-emitting diode 12. Defining the height of the electrophoresis unit 13 as H1 and the height of the light-emitting diode 12 as H2, then it satisfies: H1≥2*H2. By increasing the height of the electrophoresis unit 13, the blocking range of the obliquely incident light of the light-emitting diode 12 by the electrophoresis unit 13 can be increased, thereby enhancing the improvement of the halo problem.

[0059] In the embodiments of the present disclosure, the position of the electrophoretic particles in the microcup structure 131 can be adjusted, and the microcup structure 131 can be formed by various processes such as imprinting and etching. When forming the microcup structure 131, the height of the microcup structure 131 can be set according to actual conditions. Therefore, by controlling the height of the microcup structure 131 in the vertical direction Y and controlling the arrangement height of the electrophoretic particles in the vertical direction Y, the electrophoretic unit 13 can absorb and / or reflect the oblique light rays of the light-emitting diode 12 at multiple angles, so as to improve the halo problem of the display device.

[0060] It should be noted that the above-mentioned "vertical direction" refers to the direction perpendicular or approximately perpendicular to the driving substrate 11.

[0061] In the embodiments of the present disclosure, the first electrode 132 and the second electrode 133 in the electrophoretic unit 13 can be arranged in various ways, including at least the following two setting methods of Embodiment 1 and Embodiment 2.

[0062] Embodiment 1

[0063] As Figures 1 to 4 shown, in the embodiments of the present disclosure, the first electrode 132 and the second electrode 133 can be arranged in the vertical direction Y. Specifically, the first electrode 132 can be located on the side of the microcup structure 131 close to the driving substrate 11, and the second electrode 133 can be located on the side of the microcup structure 131 far from the driving substrate 11.

[0064] In some solutions of this embodiment, only electrophoretic particles of a single color can be provided in the electrophoretic unit 13.

[0065] For example, as Figure 3 shown, all the electrophoretic particles in the embodiments of the present disclosure can be set as black electrophoretic particles 134b to absorb the oblique light rays of the light-emitting diode 12 and the external ambient light, thereby improving the halo phenomenon of the display device.

[0066] As Figure 4 shown, all the electrophoretic particles in the embodiments of the present disclosure can also be set as white electrophoretic particles 134a to reflect the oblique light rays of the light-emitting diode 12 and the external ambient light. While improving the halo phenomenon of the display device, the light extraction rate of the display device can be maximally increased to improve the display brightness of the display device.

[0067] It should be understood that, compared with the technical solution of setting colored electrophoretic particles in the electrophoretic unit 13, the technical solution of only setting black electrophoretic particles 134b and / or white electrophoretic particles 134a in the electrophoretic unit 13 can block the oblique light of the light-emitting diode 12 to improve the halo phenomenon of the display device, and at the same time, it can avoid the complex manufacturing process of setting different colored electrophoretic particles according to the light color of the light-emitting diode 12 when setting colored electrophoretic particles, thereby simplifying the manufacturing process of the display device and reducing the manufacturing cost of the display device.

[0068] The electrophoretic particles in the embodiments of the present disclosure can also be all set as colored electrophoretic particles. Compared with the technical solution of only setting black electrophoretic particles 134b and / or white electrophoretic particles 134a in the electrophoretic unit 13, the technical solution of setting all the electrophoretic particles as colored electrophoretic particles can filter light, and further can achieve color purification to improve the color restoration degree of the display screen of the display device.

[0069] For example, when the light colors of the light-emitting diodes 12 adjacent to the electrophoretic unit 13 are all red, the electrophoretic particles in the electrophoretic unit 13 can be set as a single red electrophoretic particle 134c. The red electrophoretic particle 134c can reflect red light and white light to improve the light reflectivity of the light-emitting diode 12, thereby improving the display brightness of the display device. At the same time, the red electrophoretic particle 134c can also absorb light of other colors except red light and white light, and further can achieve purification of red light to improve the color restoration degree of red in the display screen of the display device.

[0070] It should be noted that "colored" in the embodiments of the present disclosure refers to colors other than white and black, such as: red, green, blue and other colors, which are not specifically limited herein.

[0071] In addition, in other solutions of the embodiments of the present disclosure, two different colored electrophoretic particles can also be set in the electrophoretic unit 13. The two electrophoretic particles are defined as the first electrophoretic particle and the second electrophoretic particle respectively. The first electrophoretic particle can be used to absorb and / or reflect light, and the second electrophoretic particle can also be used to absorb and / or reflect light. When the electricities of the first electrophoretic particle and the second electrophoretic particle are opposite, under the control of the first electrode 132 and the second electrode 133, the first electrophoretic particle and the second electrophoretic particle can be vertically arranged in two layers in the microcup structure 131.

[0072] Taking the first electrophoretic particle for light absorption and the second electrophoretic particle for light reflection as an example.

[0073] Such as Figure 1As shown, when no voltage is applied to the first electrode 132 and the second electrode 133, or when the voltages on the first electrode 132 and the second electrode 133 are equal, the first electrophoretic particles and the second electrophoretic particles are scattered in the microcup structure 131. The first electrophoretic particles absorb light, and the second electrophoretic particles reflect light. As Figure 2 shown, when different voltages are applied to the first electrode 132 and the second electrode 133, the first electrophoretic particles and the second electrophoretic particles are gradually separated into two layers under the action of the first electrode 132 and the second electrode 133, and remain stable in the vertical direction Y.

[0074] Specifically, when the ambient light is greater than the set brightness, the first electrode 132 and the second electrode 133 can control the first electrophoretic particles to move towards the second electrode 133, and the second electrophoretic particles to move towards the first electrode 132, so that the first electrophoretic particles are located on the side of the second electrophoretic particles away from the driving substrate 11. At this time, both the first electrophoretic particles and the second electrophoretic particles block the oblique light of the light-emitting diode 12 to improve the halo phenomenon of the display device. In addition, the first electrophoretic particles can absorb the ambient light to reduce the reflectivity of the display device to the ambient light, improve the ambient light contrast of the display device, and improve the readability of the display device under strong ambient light. The second electrophoretic particles reflect the oblique light irradiated thereon, which can improve the light output rate of the light-emitting diode 12, and thus can improve the display brightness of the display device.

[0075] When the ambient light is less than or equal to the set brightness, the first electrode 132 and the second electrode 133 can control the first electrophoretic particles to move towards the first electrode 132, and the second electrophoretic particles to move towards the second electrode 133, so that the first electrophoretic particles are located on the side of the second electrophoretic particles close to the driving substrate 11. The first electrophoretic particles absorb the oblique light of the light-emitting diode 12, and the second electrophoretic particles reflect the oblique light irradiated thereon. The first electrophoretic particles and the second electrophoretic particles can block the oblique light of the light-emitting diode 12, and then can improve the halo phenomenon of the display device; at the same time, the second electrophoretic particles reflect the oblique light of the light-emitting diode 12 irradiated thereon, which can improve the light output rate of the light-emitting diode 12, thereby improving the display brightness of the display device. Therefore, under the condition of the same display brightness, the display device can reduce the brightness of the light-emitting diode 12 to reduce the power consumption of the display device, thereby reducing the use cost of the display device.

[0076] It should be noted that the "set brightness" mentioned above refers to a brightness value set by the tester. By judging the relationship between the external ambient light and the set brightness, the voltages on the first electrode 132 and the second electrode 133 can be adjusted accordingly to move the electrophoretic particles to the target position and absorb and / or reflect the light of the light-emitting diode 12, so that the display brightness of the display device can be adjusted according to the brightness of the external ambient light, thereby improving the display effect of the display device.

[0077] Specifically, the light-emitting brightness of the lamp board 1 can be set as the set brightness. It should be understood that when the external ambient light is greater than the light-emitting brightness of the lamp board 1, the lamp board 1 reflects the external ambient light, which will make the display screen of the display device dim and unclear. By controlling the first electrophoretic particles to be located on the side of the second electrophoretic particles close to the second electrode 133, the second electrophoretic particles can be used to absorb the external ambient light to reduce the reflection of the external ambient light by the lamp board 1, and improve the ambient light contrast of the display device under strong external ambient light and the readability of the display device under strong external ambient light. When the external ambient light is less than or equal to the light-emitting brightness of the lamp board 1, the influence of the external ambient light on the display effect of the display device is relatively small. Therefore, by controlling the second electrophoretic particles to move to the side of the first electrophoretic particles away from the driving substrate 11, the second electrophoretic particles can reflect the external ambient light, so that the display brightness of the display device can be improved by using the external ambient light.

[0078] For example, as Figure 2 shown, the first electrophoretic particles in the embodiments of the present disclosure can be black electrophoretic particles 134b, and the second electrophoretic particles can be white electrophoretic particles 134a. The black electrophoretic particles 134b are used to absorb light, and the white electrophoretic particles 134a are used to reflect light. The embodiments of the present disclosure can control the voltages on the first electrode 132 and the second electrode 133 according to the relationship between the external ambient light and the set brightness to control the first electrophoretic particles and the second electrophoretic particles to move to the target position, so that the display brightness of the display device adapts to the external ambient light. That is, when the external ambient light is greater than the set brightness, the black electrophoretic particles 134b can be controlled to move to the side of the white electrophoretic particles 134a away from the driving substrate 11, so that the black electrophoretic particles 134b absorb the external ambient light and reduce the reflection of the external ambient light by the lamp board 1 to improve the ambient light contrast of the display device. When the external ambient light is less than or equal to the set brightness, the white electrophoretic particles 134a can be controlled to move to the side of the black electrophoretic particles 134b away from the driving substrate 11, so that the white electrophoretic particles 134a reflect the external ambient light to improve the display brightness of the display device, thereby improving the display effect of the display device.

[0079] However, not limited thereto, the first electrophoretic particles in the embodiments of the present disclosure may be set as black electrophoretic particles 134b, and the second electrophoretic particles may be set as color electrophoretic particles. Among them, when the light colors of the light-emitting diodes 12 adjacent to the electrophoretic unit 13 are the same and are both colors, the color of the color electrophoretic particles is the same as the light color of the light-emitting diode 12. When the external ambient light is greater than the set brightness, the black electrophoretic particles 134b can be controlled to move to the side of the color electrophoretic particles away from the driving substrate 11, so that the black electrophoretic particles 134b absorb the external ambient light and reduce the reflection of the light board 1 to the external ambient light, thereby improving the ambient light contrast of the display device. When the external ambient light is less than or equal to the set brightness, the color electrophoretic particles can be controlled to move to the side of the black electrophoretic particles 134b away from the driving substrate 11, so that the color electrophoretic particles reflect the external ambient light, thereby improving the display brightness of the display device, and thus the display effect of the display device can be improved. Since the color electrophoretic particles reflect the light of the same color as theirs and white light, and absorb the light of other colors, while the color electrophoretic particles reflect the light to improve the display brightness of the display device, the color electrophoretic particles can filter the light by absorbing the light of other colors, and then can achieve the purification of the color, so as to improve the color restoration degree of the display screen of the display device.

[0080] In addition, the first electrophoretic particles may be set as color electrophoretic particles, and the second electrophoretic particles may be set as white electrophoretic particles 134a. Among them, when the light colors of the two light-emitting diodes 12 adjacent to the electrophoretic unit 13 are the same and are both colors, the color of the color electrophoretic particles is the same as the light color of the light-emitting diode 12. When the external ambient light is greater than the set brightness, the color electrophoretic particles can be controlled to move to the side of the white electrophoretic particles 134a away from the driving substrate 11, so that the color electrophoretic particles absorb the light of some colors in the external ambient light and reduce the reflection of the light board 1 to the external ambient light, thereby improving the ambient light contrast of the display device. At the same time, the color electrophoretic particles reflect the light of the same color as theirs and white light, and can filter the light, and then can purify the color of the emitted light of the light board 1, so as to improve the color restoration degree of the display screen of the display device. When the external ambient light is less than or equal to the set brightness, the white electrophoretic particles 134a can be controlled to move to the side of the color electrophoretic particles away from the driving substrate 11, so that the white electrophoretic particles 134a reflect all colors of light in the external environment, thereby improving the display brightness of the display device, and thus the display effect of the display device can be improved.

[0081] In an embodiment of the present disclosure, the first electrode 132 and the second electrode 133 may both be provided as transparent electrodes, but are not limited thereto. The first electrode 132 and the second electrode 133 may also be provided as non-transparent electrodes. For example, the first electrode 132 and the second electrode 133 may be made of non-transparent materials such as reflective materials or light-absorbing materials, etc., and no specific limitation is made here.

[0082] In addition, the light-emitting diode 12 may include a light-emitting layer 122, a top electrode 123, and a bottom electrode 121. The bottom electrode 121 is located on the side of the light-emitting layer 122 close to the driving substrate 11, and the top electrode 123 is located on the side of the light-emitting layer 122 away from the driving substrate 11. By controlling the top electrode 123 and the bottom electrode 121, the light-emitting layer 122 can be controlled to emit light.

[0083] Among them, the first electrode 132 may be provided on the same layer as the bottom electrode 121, and the second electrode 133 may be provided on the same layer as the top electrode 123, but are not limited thereto. The first electrode 132 and the bottom electrode 121 may also be separately formed by two processes, and the second electrode 133 and the top electrode 123 may also be separately formed by two processes.

[0084] It should be noted that the above-mentioned "provided on the same layer" means being integrally processed and manufactured through the same process.

[0085] Specifically, as Figure 2a shown, in an embodiment of the present disclosure, a first electrode material layer may be first formed on the driving substrate 11, and the first electrode material layer is etched to form a plurality of bottom electrodes 121 arranged in an array on the driving substrate 11, and the first electrode 132 located between two adjacent bottom electrodes 121. By providing the first electrode 132 on the same layer as the bottom electrode 121 in the embodiment of the present disclosure, the manufacturing process of the lamp board 1 can be simplified, and thus the manufacturing cost of the display device can be reduced.

[0086] Furthermore, as Figure 2b shown, a light-emitting layer 122 is formed on the side of each bottom electrode 121 away from the driving substrate 11, and the light-emitting layer 122 is electrically connected to the bottom electrode 121. As Figure 2cAs shown, through a coating process, an organic material is coated on the side of the first electrode 132 away from the driving substrate 11 to form an organic layer. The prepared accommodation cavity is arranged on the side of the organic layer away from the first electrode 132. Among them, the accommodation cavities can be evenly arranged at the center of the organic layer. The organic layer is baked so that the accommodation cavity and the organic layer are combined to form a microcup structure 131. By combining the accommodation cavity and the organic layer, the stability of the position of the microcup structure 131 on the lamp board 1 can be ensured, and then the possibility of the position of the microcup structure 131 changing in the lamp board 1 can be reduced to improve the display effect of the display device. Electrophoretic particles are injected into the formed microcup structure 131, and then an organic-inorganic encapsulation layer is arranged on the outer peripheral side of the microcup structure 131 to encapsulate the microcup structure 131, reducing the possibility of external moisture entering the inside of the microcup structure 131 and contaminating the electrophoretic particles.

[0087] As Figure 2d shown, on the side of the organic layer and the microcup structure 131 away from the driving substrate 11, a second electrode material layer is formed, and the second electrode material layer is etched to form a top electrode 123 on the side of the organic layer away from the driving substrate 11 and a second electrode 133 on the side of the microcup structure 131 away from the driving substrate 11. In the embodiments of the present disclosure, the first electrode material layer and the second electrode material layer can be formed of a metal material. By arranging the second electrode 133 and the top electrode 123 on the same layer, the manufacturing process of the lamp board 1 can be simplified, and further the manufacturing cost of the display device can be reduced.

[0088] Furthermore, in the embodiments of the present disclosure, a side sealant can also be arranged on the side circumference of the microcup structure 131 to encapsulate the edge of the microcup structure 131, reducing the possibility of external pollutants invading the inside of the microcup structure 131 and damaging the inside of the microcup structure 131. By using the side sealant in combination with the organic-inorganic encapsulation layer, the full encapsulation of the electronic paper can be realized.

[0089] However, it is not limited thereto. More than three different colors of electrophoretic particles can also be arranged in the electrophoresis unit 13, which is not specifically limited herein.

[0090] Embodiment 2

[0091] As Figures 5 to 7 shown, in the embodiments of the present disclosure, the first electrode 132 and the second electrode 133 can be arranged in the horizontal direction X. Specifically, the first electrode 132 and the second electrode 133 can be located at opposite ends of the microcup structure 131 in the horizontal direction X.

[0092] For example, after forming a plurality of light-emitting diodes 12, an organic material may be coated on the driving substrate 11 to form an organic layer. A receiving cavity is placed on a side of the organic layer away from the driving substrate 11, and the organic layer is baked so that the receiving cavity and the organic layer are combined to form a microcup structure 131. Electrophoretic particles are injected into the receiving cavity, and then an organic-inorganic encapsulation layer is provided on an outer peripheral side of the microcup structure 131 to encapsulate the microcup structure 131. A plurality of first electrodes 132 and second electrodes 133 having a target tilt angle are formed on the driving substrate 11. The second electrodes 133 correspond to the first electrodes 132 one by one, and the first electrodes 132 and the second electrodes 133 are disposed at opposite ends of the microcup structure 131 in the horizontal direction X. Under the control of the first electrodes 132 and the second electrodes 133, the electrophoretic particles can move to a target position.

[0093] It should be noted that the above "horizontal direction" refers to a direction parallel or approximately parallel to the driving substrate 11. By controlling the voltages on the first electrodes 132 and the second electrodes 133, an electric field in the horizontal direction X can be formed in the electrophoresis unit 13.

[0094] In the embodiments of the present disclosure, the first electrodes 132 and the second electrodes 133 may be provided as light-transmitting electrodes, so that light can pass through the first electrodes 132 and the second electrodes 133 and be absorbed and / or reflected by the electrophoretic particles. However, this is not limited thereto. The first electrodes 132 and the second electrodes 133 in the embodiments of the present disclosure may also be provided as non-light-transmitting electrodes, which may be specifically determined according to actual situations.

[0095] Taking the first electrodes 132 and the second electrodes 133 as light-transmitting electrodes as an example.

[0096] In some solutions of this embodiment, only electrophoretic particles of a single color may be provided in the electrophoresis unit 13.

[0097] For example, all the electrophoretic particles may be provided as black electrophoretic particles 134b to absorb the oblique light of the light-emitting diodes 12 and the ambient light, thereby improving the halo phenomenon of the display device and enhancing the ambient light contrast of the display device.

[0098] In the embodiments of the present disclosure, all the electrophoretic particles may also be provided as white electrophoretic particles 134a to reflect the oblique light of the light-emitting diodes 12 and the ambient light. While improving the halo phenomenon of the display device, the light extraction rate of the display device can be maximally enhanced to improve the display brightness of the display device.

[0099] In the embodiments of the present disclosure, the electrophoretic particles may also be provided as a single color of colored electrophoretic particles. When the colors of the light rays of the light-emitting diodes 12 adjacent to the electrophoresis unit 13 are the same and are all colors, the color of the colored electrophoretic particles is the same as the color of the light rays of the light-emitting diodes 12.

[0100] Specifically, when the light colors of the two light-emitting diodes 12 adjacent to the electrophoresis unit 13 are both red, the electrophoresis particles can be set as red electrophoresis particles 134c. The red electrophoresis particles 134c can reflect red light and white light to improve the light reflectivity of the light-emitting diodes 12, thereby enhancing the display brightness of the display device. At the same time, the red electrophoresis particles 134c can also absorb light of other colors except red light and white light, and thus can achieve the purification of red light to improve the color reduction of red in the display screen of the display device.

[0101] However, it is not limited thereto. In other solutions of the embodiments of the present disclosure, two different colors of electrophoresis particles can also be provided in the electrophoresis unit 13. Define the two electrophoresis particles as the first electrophoresis particles and the second electrophoresis particles respectively. The first electrophoresis particles can be used to absorb and / or reflect light, and the second electrophoresis particles can also be used to absorb and / or reflect light. When the electric charges of the first electrophoresis particles and the second electrophoresis particles are opposite, under the control of the first electrode 132 and the second electrode 133, the first electrophoresis particles and the second electrophoresis particles can be horizontally arranged in two layers in the microcup structure 131.

[0102] When no voltage is applied to the first electrode 132 and the second electrode 133, or when the voltages on the first electrode 132 and the second electrode 133 are equal, the first electrophoresis particles and the second electrophoresis particles are scattered in the microcup structure 131. The first electrophoresis particles absorb light, and the second electrophoresis particles reflect light. When different voltages are applied to the first electrode 132 and the second electrode 133, the first electrophoresis particles and the second electrophoresis particles are gradually separated into two layers under the action of the first electrode 132 and the second electrode 133, and remain stable in the horizontal direction X.

[0103] For example, the first electrophoresis particles and the second electrophoresis particles in the embodiments of the present disclosure can be two different colors of colored electrophoresis particles.

[0104] When the lights of the light-emitting diodes 12 adjacent to the electrophoresis unit 13 are two different colors and both are colored, the embodiments of the present disclosure can set the first electrophoresis particles to the same color as the light of one adjacent light-emitting diode 12, and set the second electrophoresis particles to the same color as the light of the other adjacent light-emitting diode 12. The colors of the first electrophoresis particles and the second electrophoresis particles are different. Under the control of the first electrode 132 and the second electrode 133, the first electrophoresis particles and the second electrophoresis particles move towards the light-emitting diodes 12 with the same color as theirs respectively, and reflect the light with the same color.

[0105] Specifically, when the light-emitting diodes 12 with light colors of red, green, and blue are arranged in an X-axis array on the driving substrate 11 in the horizontal direction, if the light colors of two adjacent light-emitting diodes 12 to the electrophoresis unit 13 are red and green respectively, the first electrophoresis particles in the electrophoresis unit 13 can be set as red electrophoresis particles 134c, and the second electrophoresis particles can be set as green electrophoresis particles 134d. Under the control of the first electrode 132 and the second electrode 133, the red electrophoresis particles 134c move towards the light-emitting diode 12 with red light and reflect the red light of the light-emitting diode 12, and the green electrophoresis particles 134d move towards the light-emitting diode 12 with green light and reflect the green light of the light-emitting diode 12. If the light colors of two adjacent light-emitting diodes 12 to the electrophoresis unit 13 are green and blue respectively, the first electrophoresis particles in the electrophoresis unit 13 can be set as green electrophoresis particles 134d, and the second electrophoresis particles can be set as blue electrophoresis particles 134e. Under the control of the first electrode 132 and the second electrode 133, the green electrophoresis particles 134d move towards the light-emitting diode 12 with green light and reflect the green light of the light-emitting diode 12, and the blue electrophoresis particles 134e move towards the light-emitting diode 12 with blue light and reflect the blue light of the light-emitting diode 12. If the light colors of two adjacent light-emitting diodes 12 to the electrophoresis unit 13 are blue and red respectively, the first electrophoresis particles in the electrophoresis unit 13 can be set as blue electrophoresis particles 134e, and the second electrophoresis particles can be set as red electrophoresis particles 134c. Under the control of the first electrode 132 and the second electrode 133, the blue electrophoresis particles 134e move towards the light-emitting diode 12 with blue light and reflect the blue light of the light-emitting diode 12, and the red electrophoresis particles 134c move towards the light-emitting diode 12 with red light and reflect the red light of the light-emitting diode 12.

[0106] By using the electrophoresis particles to reflect light, the light output rate of the light-emitting diodes 12 can be increased, thereby improving the display brightness of the display device. At the same time, by setting the electrophoresis particles corresponding to the light colors of the adjacent light-emitting diodes 12 in the electrophoresis unit 13, the electrophoresis particles can be controlled to move towards the light-emitting diode 12 with the same light color as them, so as to use the electrophoresis particles to filter the light of the light-emitting diode 12, so as to achieve the purification of the light color emitted by the lamp board 1, and then the color reduction degree of the display picture of the display device can be improved.

[0107] In the embodiments of the present disclosure, the first electrophoresis particles can also be set as colored electrophoresis particles, and the second electrophoresis particles can be set as white electrophoresis particles 134a or black electrophoresis particles 134b.

[0108] For example, when the lights of two light-emitting diodes 12 adjacent to the electrophoresis unit 13 are red and green respectively, the first electrophoresis particles can be set as red electrophoresis particles 134c, and the second electrophoresis particles can be set as white electrophoresis particles 134a or black electrophoresis particles 134b. Under the control of the first electrode 132 and the second electrode 133, the first electrophoresis particles move towards the light-emitting diode 12 with red light, and the second electrophoresis particles move towards the light-emitting diode 12 with green light. The first electrophoresis particles can filter the red light to achieve the purification of the red light, and thus improve the color reduction of red in the display screen of the display device.

[0109] However, it is not limited to this. When the lights of two light-emitting diodes 12 adjacent to the electrophoresis unit 13 are red and green respectively, the first electrophoresis particles can also be set as green electrophoresis particles 134d, and the second electrophoresis particles can be set as white electrophoresis particles 134a or black electrophoresis particles 134b. Under the control of the first electrode 132 and the second electrode 133, the first electrophoresis particles move towards the light-emitting diode 12 with green light, and the second electrophoresis particles move towards the light-emitting diode 12 with red light. The first electrophoresis particles can filter the green light to achieve the purification of the green light, and thus improve the color reduction of green in the display screen of the display device.

[0110] In addition, the first electrophoresis particles in the embodiments of the present disclosure can be set as black electrophoresis particles 134b, and the second electrophoresis particles can be set as white electrophoresis particles 134a.

[0111] For example, when the light colors of two light-emitting diodes 12 adjacent to the electrophoresis unit 13 are red and green respectively, if it is necessary to enhance the intensity of the red light in the display device and weaken the intensity of the green light in the display device, the first electrode 132 and the second electrode 133 can be controlled to make the white electrophoresis particles 134a move towards the light-emitting diode 12 with red light, so as to improve the exit rate of the red light through the reflection of the red light by the white electrophoresis particles 134a; at the same time, make the black electrophoresis particles 134b move towards the light-emitting diode 12 with green light, and absorb the green light through the black electrophoresis particles 134b to reduce the exit rate of the green light.

[0112] As Figures 5 to 7 shown, the first electrode 132 and the second electrode 133 in the embodiments of the present disclosure can be arranged parallel to the perpendicular line of the driving substrate 11, but it is not limited to this. The first electrode 132 and the second electrode 133 can also be arranged obliquely to the perpendicular line of the driving substrate 11, which can be determined according to the actual situation.

[0113] As Figure 6a and Figure 7aAs shown, the included angle between the first electrode 132 and the perpendicular line of the driving substrate 11 can be defined as α1, and the included angle between the second electrode 133 and the perpendicular line of the driving substrate 11 can be defined as α2.

[0114] It should be noted that since the thicknesses of the first electrode 132 and the second electrode 133 are relatively thin and the surface of the driving substrate 11 is uneven, when the first electrode 132 and the second electrode 133 are arranged perpendicular to the driving substrate 11, the contact surfaces between the first electrode 132 and the second electrode 133 and the driving substrate 11 are small, and it is difficult to arrange them perpendicularly. In addition, the contact surfaces between the first electrode 132 and the second electrode 133 and the driving substrate 11 are uneven, and the contact stresses between the first electrode 132 and the second electrode 133 and the driving substrate 11 are uneven. After the first electrode 132 and the second electrode 133 are arranged perpendicular to the driving substrate 11, it is easy to cause film defects in the first electrode 132 and the second electrode 133 and result in a large resistance on the first electrode 132 and the second electrode 133.

[0115] In the embodiments of the present disclosure, by arranging the first electrode 132 and the second electrode 133 both inclined with respect to the perpendicular line of the driving substrate 11, and the tops of the first electrode 132 and the second electrode 133 are inclined towards each other or away from each other, the contact surfaces between the first electrode 132 and the second electrode 133 and the driving substrate 11 can be increased, and the difficulty of arranging the first electrode 132 and the second electrode 133 on the driving substrate 11 can be reduced. At the same time, by increasing the contact surfaces between the first electrode 132 and the second electrode 133 and the driving substrate 11, the contact stresses between the first electrode 132 and the second electrode 133 and the driving substrate 11 can be made uniform, and then the possibility of film defects occurring in the first electrode 132 and the second electrode 133 after being arranged on the driving substrate 11 and resulting in a large resistance on the first electrode 132 and the second electrode 133 can be reduced, thereby reducing the energy consumption of the display device.

[0116] Furthermore, to ensure that under the control of the first electrode 132 and the second electrode 133, the electrophoresis unit 13 has sufficient space in the horizontal direction X so that two kinds of electrophoresis particles with different charges can be separated into two layers in the horizontal direction X, α1 and α2 in the embodiments of the present disclosure can respectively satisfy α1≤45° and α2≤45°.

[0117] For example, when α1 = 0° and α2 = 0°, the first electrode 132 and the second electrode 133 are parallel to each other, and the first electrode 132 and the second electrode 133 are both arranged perpendicular to the driving substrate 11.

[0118] When α1 = 45° and α2 = 45°, the included angle between the first electrode 132 and the second electrode 133 is 90°, and both the first electrode 132 and the second electrode 133 are inclined with respect to the perpendicular line of the driving substrate 11.

[0119] The present disclosure provides a display device, which may include a control chip and any one of the above-mentioned lamp boards. Among them, the control chip is electrically connected to the driving substrate 11. The control chip can control the light-emitting diode 12 to emit light through the driving substrate 11 to achieve the display function of the display device. At the same time, the control chip can also control the movement of electrophoretic particles through the driving substrate 11 to control the electrophoretic particles to absorb and / or reflect the light of the light-emitting diode 12, thereby improving the halo problem of the display device and enhancing the display effect of the display device.

[0120] The display device in the embodiments of the present disclosure may be a Mini LED display device, a Micro LED display device, etc., and no specific limitation is made here. In the embodiments of the present disclosure, the lamp board 1 can be directly used as the direct display light source of the display device to achieve the display function of the display device. However, it is not limited thereto. The lamp board 1 in this embodiment can also be used as a backlight module and cooperate with the liquid crystal display panel to achieve the display function of the display device.

[0121] It should be noted that since the arrangement of the electrophoretic particles in the electrophoresis unit 13 can be stabilized for a long time after the distribution of the electrophoretic particles in the electrophoresis unit 13 is stable, after the position arrangement of the electrophoretic particles in the electrophoresis unit 13 is stable, the power supply to the first electrode 132 and the second electrode 133 can be stopped. Compared with the related technical solutions in which the electrophoresis unit 13 is not provided between two adjacent light-emitting diodes 12, the technical solution of the present disclosure in which the electrophoresis unit 13 is provided between two adjacent light-emitting diodes 12 does not significantly increase the overall power consumption of the display device. Therefore, while improving the halo problem of the display device, the energy consumption of the display device can be saved to save the use cost of the display device.

[0122] In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specifically defined.

[0123] It should be noted that terms such as "upper", "lower", "left", and "right" are only used for distinction for convenience of description, and do not impose limitations on the orientation of the embodiments of the present invention. For example, the so-called "upper" can actually be in the orientation of "lower", "left", "right", etc. In this disclosure, unless otherwise clearly specified and limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0124] In the description of this specification, the descriptions referring to terms such as "some embodiments" and "exemplarily" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0125] Although the embodiments of this disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on this disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this disclosure. Therefore, any changes or modifications made in accordance with the claims and the description of this disclosure shall fall within the scope covered by the patent of this disclosure.

Claims

1. A light board, characterized in that: include: Driver substrate; A plurality of light emitting diodes are arranged in an array on the driving substrate; A plurality of electrophoretic units are arranged in an array on the driving substrate, and the electrophoretic units are located between two adjacent light-emitting diodes, the electrophoretic units include a microcup structure, a first electrode and a second electrode, the microcup structure is filled with electrophoretic particles, and the electrophoretic particles are arranged between the first electrode and the second electrode; the electrophoretic particles include first electrophoretic particles and second electrophoretic particles; an organic and inorganic encapsulation layer is arranged on the outer peripheral side of the microcup structure to encapsulate the microcup structure; The electrophoretic particles can move to a target position under the control of the first electrode and the second electrode to absorb and / or reflect oblique light from the adjacent light emitting diode, wherein: The first electrode is located on a side of the microcup structure close to the driving substrate, and the second electrode is located on a side of the microcup structure away from the driving substrate; or, The first electrode and the second electrode are located at opposite ends of the microcup structure in the horizontal direction. The first electrode and the second electrode are light-transmitting electrodes. When the colors of light from two adjacent light-emitting diodes are different, if the first electrophoretic particle has the same color as the light from one of the adjacent light-emitting diodes, and the second electrophoretic particle has the same color as the light from another adjacent light-emitting diode, under the control of the first electrode and the second electrode, the first electrophoretic particle and the second electrophoretic particle move toward the direction of the light-emitting diode with the same color as the first electrophoretic particle.

2. The light board according to claim 1, characterized in that: The first electrophoretic particles and the second electrophoretic particles can be arranged in two layers in the microcup structure under the control of the first electrode and the second electrode.

3. The light board according to claim 2, characterized in that: When the first electrode is located on a side of the microcup structure close to the driving substrate and the second electrode is located on a side of the microcup structure away from the driving substrate, the first electrophoretic particles are used to absorb light and the second electrophoretic particles are used to reflect light, wherein: The first electrode and the second electrode can control the first electrophoretic particle to move toward the second electrode and the second electrophoretic particle to move toward the first electrode when the ambient light is greater than a set brightness, so that the first electrophoretic particle is located on a side of the second electrophoretic particle away from the driving substrate; The first electrode and the second electrode can control the first electrophoretic particle to move toward the first electrode and the second electrophoretic particle to move toward the second electrode when the ambient light is less than or equal to the set brightness, so that the first electrophoretic particle is located on a side of the second electrophoretic particle close to the driving substrate.

4. The light board according to claim 3, characterized in that: The light emitting diode comprises a light emitting layer, a top electrode and a bottom electrode, wherein the bottom electrode is located on a side of the light emitting layer close to the driving substrate, and the top electrode is located on a side of the light emitting layer away from the driving substrate. The first electrode is disposed in the same layer as the bottom electrode, and the second electrode is disposed in the same layer as the top electrode.

5. The light board according to claim 2, characterized in that: When the first electrode and the second electrode are located at opposite ends of the microcup structure in the horizontal direction and the first electrode and the second electrode are light-transmitting electrodes, the first electrophoretic particles and the second electrophoretic particles can be horizontally arranged in two layers in the microcup structure under the control of the first electrode and the second electrode.

6. The light board according to claim 5, characterized in that: The first electrode and the second electrode are arranged obliquely to a vertical line of the driving substrate, and top ends of the first electrode and the second electrode are inclined in a direction approaching each other or in a direction away from each other.

7. The light board according to any one of claims 2 to 5, characterized in that: The first electrophoretic particles are black electrophoretic particles, and the second electrophoretic particles are white electrophoretic particles.

8. The light board according to claim 1, characterized in that: The electrophoretic particles include a single black electrophoretic particle or a single white electrophoretic particle; and / or The height of the electrophoresis unit is greater than the height of the light emitting diode; and / or There is a gap between the electrophoresis unit and the adjacent light emitting diodes, and the width of the gap is less than 1 / 4 of the distance between two adjacent light emitting diodes.

9. A display device, characterized in that: The display device comprises a control chip and the light board as claimed in any one of claims 1 to 8, wherein the control chip is electrically connected to the driving substrate to control the light emission of the light emitting diode and the movement of the electrophoretic particles through the driving substrate.

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