A light-emitting device and a light-emitting screen body

Abstract

The present invention discloses a light-emitting device and a light-emitting screen body. The light-emitting device includes: a substrate, the substrate includes a light-emitting region and a non-light-emitting region located on one side of the light-emitting region; a light-emitting unit is located in the light-emitting region, and the light-emitting unit includes a stack of a first electrode, a light-emitting device layer, and a second electrode, and the first electrode is located on the surface of the substrate; a first electrode lead is located in the non-light-emitting region and is electrically connected to the first electrode; an electronic paper microcapsule structure is located in the non-light-emitting region, and the electronic paper microcapsule structure includes a transparent capsule, a third electrode, at least one electronic paper microcapsule, and a fourth electrode. The electronic paper microcapsule includes a first conductive dye particle and a second conductive dye particle. The transparent capsule is used for placing the first conductive dye particle and the second conductive dye particle. The colors of the first conductive dye particle and the second conductive dye particle are different, and the color of the first conductive dye particle is the same as the light-emitting color of the light-emitting unit. The technical solution provided by the embodiments of the present invention improves the lighting and display effects of the light-emitting device.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and particularly to a light-emitting device and a light-emitting screen body. Background Art

[0002] When existing organic light-emitting (OLED) devices include multiple light-emitting regions, if separate individual control is desired, each light-emitting region has an independently provided first electrode.

[0003] Existing light-emitting devices have the following defects: The lead of the first electrode will encroach on the area of the light-emitting region, thereby reducing the aperture ratio of the light-emitting device, and the gap between two light-emitting regions will also increase; when the light-emitting device emits light, the contrast of the light-emitting device is not high. The above defects will affect the lighting and display effects of the light-emitting device. Summary of the Invention

[0004] The present invention provides a light-emitting device and a light-emitting screen body to improve the lighting and display effects of the light-emitting device.

[0005] According to one aspect of the present invention, there is provided a light-emitting device, comprising:

[0006] a substrate, the substrate including a light-emitting region and a non-light-emitting region on one side of the light-emitting region;

[0007] a light-emitting unit, the light-emitting unit being located in the light-emitting region, the light-emitting unit including a stack of a first electrode, a light-emitting device layer, and a second electrode, the first electrode being located on the surface of the substrate;

[0008] a first electrode lead, the first electrode lead being located in the non-light-emitting region and electrically connected to the first electrode;

[0009] an electrophoretic microcapsule structure, the electrophoretic microcapsule structure being located in the non-light-emitting region, the electrophoretic microcapsule structure including a transparent capsule, a third electrode, at least one electrophoretic microcapsule, and a fourth electrode, the electrophoretic microcapsule including a first conductive dye particle and a second conductive dye particle, the transparent capsule being used to place the first conductive dye particle and the second conductive dye particle, the colors of the first conductive dye particle and the second conductive dye particle being different, and the color of the first conductive dye particle being the same as the light-emitting color of the light-emitting unit.

[0010] Optionally, the first electrode lead is multiplexed as the third electrode conductive dye particle conductive dye particle conductive dye particle.

[0011] Optionally, the light-emitting device layer covers the light-emitting region and the non-light-emitting region;

[0012] The electrophoretic microcapsule structure further includes a first insulating layer;

[0013] The third electrode is located on the surface of the substrate;

[0014] The electronic paper microcapsule structure is located on the surface of the third electrode away from the substrate;

[0015] The orthographic projection of the first insulating layer on the substrate overlaps with the orthographic projection of the non-light-emitting area on the substrate, and the first insulating layer covers the electronic paper microcapsule structure;

[0016] The second electrode is multiplexed as the fourth electrode.

[0017] Optionally, the light-emitting device is top-emitting, the first electrode is the anode, and the second electrode is the cathode.

[0018] Optionally, the thickness of the first insulating layer is matched with the light-emitting voltage of the light-emitting device, the electric field strength required by the first conductive dye particles, the moving distance required by the first conductive dye particles, the electric field strength required by the second conductive dye particles, and the moving distance required by the second conductive dye particles.

[0019] Optionally, the light-emitting device layer covers the light-emitting area and the non-light-emitting area;

[0020] The electronic paper microcapsule structure further includes a second insulating layer and a third insulating layer;

[0021] The fourth electrode is located on the surface of the substrate;

[0022] The electronic paper microcapsule structure is located on the surface of the fourth electrode away from the substrate;

[0023] The orthographic projection of the second insulating layer on the substrate overlaps with the orthographic projection of the non-light-emitting area on the substrate, and the second insulating layer covers the electronic paper microcapsule structure;

[0024] The third electrode is located on the surface of the second insulating layer away from the electronic paper microcapsule structure;

[0025] The third insulating layer is located on the surface of the third electrode away from the second insulating layer, and the third insulating layer covers the third electrode;

[0026] The voltages of the fourth electrode and the second electrode are the same.

[0027] Optionally, the light-emitting device is bottom-emitting, the first electrode is the anode, and the second electrode is the cathode.

[0028] Optionally, the thickness of the second insulating layer matches the voltage difference between the third electrode and the fourth electrode, the electric field strength required by the first conductive dye particles, the moving distance required by the first conductive dye particles, the electric field strength required by the second conductive dye particles, and the moving distance required by the second conductive dye particles.

[0029] Optionally, the fourth electrode is electrically connected to the second electrode.

[0030] According to another aspect of the present invention, a light-emitting screen body is provided, including the light-emitting device as described in any embodiment of the present invention;

[0031] The light-emitting device includes a light-emitting area and a non-light-emitting area, and the electrophoretic microcapsule structure of the light-emitting device is located in the non-light-emitting area.

[0032] The technical solution provided by the embodiment of the present invention can improve the aperture ratio of the light-emitting device when the light-emitting unit emits light, reduce the gap between the two light-emitting areas, or improve the contrast between the two light-emitting areas by setting the cooperation relationship between the electric field directions of the first conductive dye particles and the second conductive dye particles in the electrophoretic microcapsule structure located in the non-light-emitting area and the light-emitting direction of the light-emitting unit, thereby improving the illumination and display effects of the light-emitting device. Among them, the first conductive dye particles and the second conductive dye particles can move in the transparent capsule under the action of an electric field, ensuring the reliability of the electrophoretic microcapsule to improve the illumination and display effects.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 is the first structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention emits light;

[0036] Figure 2 is the first structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention does not emit light;

[0037] Figure 3 is the second structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention emits light;

[0038] Figure 4 It is the second structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention does not emit light;

[0039] Figure 5 It is the first structural schematic diagram when the second light-emitting device provided by the embodiment of the present invention emits light;

[0040] Figure 6 It is the first structural schematic diagram when the second light-emitting device provided by the embodiment of the present invention does not emit light;

[0041] Figure 7 It is the second structural schematic diagram when the second light-emitting device provided by the embodiment of the present invention emits light;

[0042] Figure 8 It is the second structural schematic diagram when the second light-emitting device provided by the embodiment of the present invention does not emit light;

[0043] Figure 9 It is the structural schematic diagram of a light-emitting screen body provided by the embodiment of the present invention. Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] In order to improve the lighting and display effects of the light-emitting device, the embodiments of the present invention provide the following technical solutions:

[0047] See Figures 1-4 , Figure 1It is the first structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention emits light. Figure 2 It is the first structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention does not emit light. Figure 3 It is the second structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention emits light. Figure 4 It is the second structural schematic diagram when the first light-emitting device provided by the embodiment of the present invention does not emit light. The light-emitting device includes: a substrate 1, the substrate 1 includes a light-emitting area 2A and a non-light-emitting area 2B located on one side of the light-emitting area 2A; a light-emitting unit 2, the light-emitting unit 2 is located in the light-emitting area 2A, and the light-emitting unit 2 includes a stack of a first electrode 20, a light-emitting device layer 21, and a second electrode 22, and the first electrode 20 is located on the surface of the substrate 1; a first electrode lead 3, the first electrode lead 3 is located in the non-light-emitting area 2B and is electrically connected to the first electrode 20; an electrophoretic microcapsule structure 4, the electrophoretic microcapsule structure 4 is located in the non-light-emitting area 2B, and the electrophoretic microcapsule structure 4 includes a transparent capsule body T0, a third electrode 40, at least one electrophoretic microcapsule 41, and a fourth electrode 42. The electrophoretic microcapsule 41 includes a first conductive dye particle Q1 and a second conductive dye particle Q2, and the transparent capsule body T0 is used to place the first conductive dye particle Q1 and the second conductive dye particle Q2. The charging types of the first conductive dye particle Q1 and the second conductive dye particle Q2 can be opposite or the same; the colors of the first conductive dye particle Q1 and the second conductive dye particle Q2 are different, and the color of the first conductive dye particle Q1 is the same as the light-emitting color of the light-emitting unit 2.

[0048] When the charging types of the first conductive dye particle Q1 and the second conductive dye particle Q2 are opposite, when the light-emitting unit 2 emits light, the electric field formed by the third electrode 40 and the fourth electrode 42 is the first electric field, and when the light-emitting unit 2 does not emit light, the electric field formed by the third electrode 40 and the fourth electrode 42 is the second electric field, and the electric field directions of the first electric field and the second electric field are opposite.

[0049] The light-emitting color of the light-emitting unit 2 includes any one of red, green, and blue.

[0050] When the charging types of the first conductive dye particles Q1 and the second conductive dye particles Q2 are the same, the directions of the first electric field and the second electric field are the same, but the values are different. The first conductive dye particles Q1 and the second conductive dye particles Q2 can move and the other can remain stationary under different electric fields. Exemplarily, when the light-emitting unit 2 emits light, when the first conductive dye particles Q1 and the second conductive dye particles Q2 are under the action of the first electric field, the moving direction of the first conductive dye particles Q1 is the same as the light-emitting direction of the light-emitting unit 2, and the second conductive dye particles Q2 do not move, thereby improving the aperture ratio of the light-emitting device, reducing the gap between the two light-emitting regions 2A, and improving the lighting and display effects. When the light-emitting unit 2 emits light, when the first conductive dye particles Q1 and the second conductive dye particles Q2 are under the action of the second electric field, the moving direction of the second conductive dye particles Q2 is the same as the light-emitting direction of the light-emitting unit 2, the first conductive dye particles Q1 do not move, and the moving direction of the second conductive dye particles Q2 is the same as the light-emitting direction of the light-emitting unit 2, thereby improving the contrast between the two light-emitting regions 2A, and thus improving the lighting and display effects.

[0051] When the first conductive dye particles Q1 are positively charged and the second conductive dye particles Q2 are negatively charged, the light-emitting principle of the light-emitting device provided in this embodiment is as follows:

[0052] The first case: Refer to Figure 1 and Figure 2 , when the light-emitting unit 2 emits light, under the action of the first electric field (the direction of the first electric field is from the third electrode 40 to the fourth electrode 42), the moving direction of the first conductive dye particles Q1 is the same as the light-emitting direction of the light-emitting unit 2; when the light-emitting unit 2 does not emit light, under the action of the second electric field (the direction of the second electric field is from the fourth electrode 42 to the third electrode 40), the moving direction of the first conductive dye particles Q1 is opposite to the light-emitting direction of the light-emitting unit 2.

[0053] That is, when the light-emitting unit 2 emits light, the moving direction of the first conductive dye particles Q1 is the same as the light-emitting direction of the light-emitting unit 2, and the moving direction of the second conductive dye particles Q2 is opposite to the light-emitting direction of the light-emitting unit 2, thereby improving the aperture ratio of the light-emitting device, reducing the gap between the two light-emitting regions 2A, and improving the lighting and display effects.

[0054] When the light-emitting unit 2 does not emit light, the moving direction of the first conductive dye particles Q1 is opposite to the light-emitting direction of the light-emitting unit 2, and the moving direction of the second conductive dye particles Q2 is the same as the light-emitting direction of the light-emitting unit 2.

[0055] When the first conductive dye particles Q1 are negatively charged and the second conductive dye particles Q2 are positively charged, the light-emitting principle of the light-emitting device provided in this embodiment is as follows:

[0056] The second case: Refer to Figure 3 and Figure 4 . When the light-emitting unit 2 emits light, under the action of the first electric field (the direction of the first electric field is from the third electrode 40 to the fourth electrode 42), the moving direction of the first conductive dye particles Q1 is opposite to the light-emitting direction of the light-emitting unit 2; when the light-emitting unit 2 does not emit light, under the action of the second electric field (the direction of the second electric field is from the fourth electrode 42 to the third electrode 40), the moving direction of the first conductive dye particles Q1 is the same as the light-emitting direction of the light-emitting unit 2.

[0057] That is, when the light-emitting unit 2 emits light, the moving direction of the first conductive dye particles Q1 is opposite to the light-emitting direction of the light-emitting unit 2, and the moving direction of the second conductive dye particles Q2 is the same as the light-emitting direction of the light-emitting unit 2, thereby improving the contrast of the two light-emitting areas 2A, and thus improving the lighting and display effects.

[0058] When the light-emitting unit 2 does not emit light, the moving direction of the first conductive dye particles Q1 is the same as the light-emitting direction of the light-emitting unit 2, and the moving direction of the second conductive dye particles Q2 is opposite to the light-emitting direction of the light-emitting unit 2.

[0059] The first electric field and the second electric field are determined by the voltages applied by the third electrode 40 and the fourth electrode 42.

[0060] Exemplarily, Figures 1-4 in, the voltages of the third electrode 40, the first electrode lead 3, and the first electrode 20 are the same, and the voltages of the fourth electrode 42 and the second electrode 22 are the same.

[0061] The technical solution provided by the embodiment of the present invention can improve the aperture ratio of the light-emitting device when the light-emitting unit 2 emits light, reduce the gap between the two light-emitting areas 2A, or improve the contrast of the two light-emitting areas 2A by setting the cooperation relationship between the electric field directions of the first conductive dye particles Q1 and the second conductive dye particles Q2 in the electronic paper microcapsule structure 4 located in the non-light-emitting area 2B and the light-emitting direction of the light-emitting unit 2, thereby improving the lighting and display effects of the light-emitting device. Among them, the first conductive dye particles Q1 and the second conductive dye particles Q2 can move in the transparent capsule T0 under the action of the electric field, ensuring the reliability of the electronic paper microcapsule 41 to improve the lighting and display effects.

[0062] Optionally, on the basis of the above technical solution, the first electrode lead 3 is reused as the third electrode 40. In the above technical solution, the first electrode lead 3 is reused as the third electrode 40, which simplifies the structure of the light-emitting device and reduces the manufacturing cost.

[0063] Optionally, on the basis of the above technical solution, the color of the second conductive dye particles Q2 is black.

[0064] Specifically, the color of the second conductive dye particles Q2 is black. When the light-emitting unit 2 emits light, the moving direction of the first conductive dye particles Q1 is opposite to the light-emitting direction of the light-emitting unit 2, and the moving direction of the second conductive dye particles Q2 is the same as the light-emitting direction of the light-emitting unit 2, thereby further enhancing the contrast of the two light-emitting regions 2A and improving the lighting and display effects.

[0065] The structure of the first type of light-emitting device will be introduced below. As Figures 1-4 shown, optionally, on the basis of the above technical solution, the light-emitting device layer 21 covers the light-emitting region 2A and the non-light-emitting region 2B; the electronic paper microcapsule structure 4 further includes a first insulating layer 43; the third electrode 40 is located on the surface of the substrate 1; the electronic paper microcapsule structure 4 is located on the surface of the third electrode 40 away from the substrate 1; the orthographic projection of the first insulating layer 43 on the substrate 1 overlaps with the orthographic projection of the non-light-emitting region 2B on the substrate 1, and the first insulating layer 43 covers the electronic paper microcapsule structure 4; the second electrode 22 is reused as the fourth electrode 42.

[0066] In this embodiment, since the light-emitting unit 2 emits light by current driving, the setting of the first insulating layer 43 makes the light-emitting device layer 21 in the non-light-emitting region 2B not in direct contact with the third electrode 40, and the light-emitting device layer 21 located in the non-light-emitting region 2B cannot emit light. The first conductive dye particles Q1 and the second conductive dye particles Q2 are charged particles and can move under the electric field of the third electrode 40 and the fourth electrode 42.

[0067] The second electrode 22 is reused as the fourth electrode 42, which can further simplify the structure of the light-emitting device and reduce the manufacturing cost. Among them, the voltages of the third electrode 40, the first electrode lead 3, and the first electrode 20 are the same, and the voltages of the fourth electrode 42 and the second electrode 22 are the same.

[0068] Optionally, on the basis of the above technical solution, as Figures 1-4 shown, the light-emitting device is top-emitting, the first electrode 20 is an anode, and the second electrode 22 is a cathode.

[0069] Referring to Figure 1 and Figure 2 , the light-emitting device is top-emitting, the first electrode 20 is an anode, the second electrode 22 is a cathode, the first conductive dye particles Q1 are positively charged, and the second conductive dye particles Q2 are negatively charged. The first electrode lead 3 is reused as the third electrode 40, and the second electrode 22 is reused as the fourth electrode 42.

[0070] When the light-emitting unit 2 emits light, a forward voltage is applied between the first electrode 20 and the second electrode 22, and the direction of the electric field at the first conductive dye particles Q1 and the second conductive dye particles Q2 is from the substrate 1 towards the second electrode 22. The first conductive dye particles Q1 move towards the second electrode 22, and the second conductive dye particles Q2 move towards the substrate 1. Since the color of the first conductive dye particles Q1 is the same as the emission color of the light-emitting unit 2, the first conductive dye particles Q1 can make the non-light-emitting area 2B present the same emission color as the light-emitting unit 2, thereby improving the aperture ratio of the light-emitting device, reducing the gap between the two light-emitting areas 2A, and improving the lighting and display effects.

[0071] When the light-emitting unit 2 does not emit light, a reverse voltage is applied between the first electrode 20 and the second electrode 22, and the direction of the electric field at the first conductive dye particles Q1 and the second conductive dye particles Q2 is from the second electrode 22 towards the substrate 1. The first conductive dye particles Q1 move towards the substrate 1, and the second conductive dye particles Q2 move towards the second electrode 22.

[0072] See Figure 3 and Figure 4 , the light-emitting device is top-emitting, the first electrode 20 is the anode, the second electrode 22 is the cathode, the first conductive dye particles Q1 are negatively charged, and the second conductive dye particles Q2 are positively charged. The first electrode lead 3 is multiplexed as the third electrode 40, and the second electrode 22 is multiplexed as the fourth electrode 42.

[0073] When the light-emitting unit 2 emits light, a forward voltage is applied between the first electrode 20 and the second electrode 22, and the direction of the electric field at the first conductive dye particles Q1 and the second conductive dye particles Q2 is from the substrate 1 towards the second electrode 22. The first conductive dye particles Q1 move towards the substrate 1, and the second conductive dye particles Q2 move towards the second electrode 22, thereby improving the contrast between the two light-emitting areas 2A, and improving the lighting and display effects.

[0074] When the light-emitting unit 2 does not emit light, a reverse voltage is applied between the first electrode 20 and the second electrode 22, and the direction of the electric field at the first conductive dye particles Q1 and the second conductive dye particles Q2 is from the second electrode 22 towards the substrate 1. The first conductive dye particles Q1 move towards the second electrode 22, and the second conductive dye particles Q2 move towards the substrate 1.

[0075] Optionally, on the basis of the above technical solution, the thickness of the first insulating layer 43 is matched with the emission voltage of the light-emitting device, the electric field strength required by the first conductive dye particles Q1, the moving distance required by the first conductive dye particles Q1, the electric field strength required by the second conductive dye particles Q2, and the moving distance required by the second conductive dye particles Q2.

[0076] The emission voltage of the light-emitting device is the voltage difference between the first electrode 20 and the second electrode 22. The thickness of the first insulating layer 43 can be reasonably set according to the emission voltage of the light-emitting device, the electric field strength required for the first conductive dye particles Q1, the moving distance required for the first conductive dye particles Q1, the electric field strength required for the second conductive dye particles Q2, and the moving distance required for the second conductive dye particles Q2.

[0077] The following introduces the structure of the second light-emitting device. Refer to Figures 5-8 , Figure 5 FIG. is a first schematic structural diagram of the second light-emitting device when it emits light according to an embodiment of the present invention. Figure 6 FIG. is a first schematic structural diagram of the second light-emitting device when it does not emit light according to an embodiment of the present invention. Figure 7 FIG. is a second schematic structural diagram of the second light-emitting device when it emits light according to an embodiment of the present invention. Figure 8 FIG. is a second schematic structural diagram of the second light-emitting device when it does not emit light according to an embodiment of the present invention. Optionally, on the basis of the above technical solution, the light-emitting device layer 21 covers the light-emitting area 2A and the non-light-emitting area 2B; the electronic paper microcapsule structure 4 further includes a second insulating layer 44 and a third insulating layer 45; the fourth electrode 42 is located on the surface of the substrate 1; the electronic paper microcapsule structure 4 is located on the surface of the fourth electrode 42 away from the substrate 1; the orthographic projection of the second insulating layer 44 on the substrate 1 overlaps with the orthographic projection of the non-light-emitting area 2B on the substrate 1, and the second insulating layer 44 covers the electronic paper microcapsule structure 4; the third electrode 40 is located on the surface of the second insulating layer 44 away from the electronic paper microcapsule structure 4; the third insulating layer 45 is located on the surface of the third electrode 40 away from the second insulating layer 44, and the third insulating layer 45 covers the third electrode 40, and the voltages of the third electrode 40 and the fourth electrode 42 are the same.

[0078] In this embodiment, since the light-emitting unit 2 is current-driven to emit light, due to the setting of the third insulating layer 45, the light-emitting device layer 21 in the non-light-emitting area 2B does not directly contact the third electrode 40, and the light-emitting device layer 21 located in the non-light-emitting area 2B cannot emit light. The first conductive dye particles Q1 and the second conductive dye particles Q2 are charged particles and can move under the electric field action of the third electrode 40 and the fourth electrode 42. Among them, the voltages of the third electrode 40, the first electrode lead 3, and the first electrode 20 are the same, and the voltages of the third electrode 40 and the fourth electrode 42 are the same.

[0079] Optionally, on the basis of the above technical solution, as Figures 5-8 shown, the light-emitting device is bottom-emitting, the first electrode 20 is the anode, and the second electrode 22 is the cathode.

[0080] Refer to Figure 5 and Figure 6, the light-emitting device has bottom emission, the first electrode 20 is the anode, the second electrode 22 is the cathode, the first conductive dye particles Q1 are positively charged, and the second conductive dye particles Q2 are negatively charged. The first electrode lead 3 is reused as the third electrode 40.

[0081] When the light-emitting unit 2 emits light, a forward voltage is applied between the first electrode 20 and the second electrode 22, and a forward voltage is applied between the third electrode 40 and the fourth electrode 42. The electric field directions at the first conductive dye particles Q1 and the second conductive dye particles Q2 are from the second electrode 22 towards the substrate 1. The first conductive dye particles Q1 move towards the substrate 1, and the second conductive dye particles Q2 move towards the second electrode 22. Since the color of the first conductive dye particles Q1 is the same as the emission color of the light-emitting unit 2, the first conductive dye particles Q1 can make the non-light-emitting area 2B present the same emission color as the light-emitting unit 2, thereby improving the aperture ratio of the light-emitting device, reducing the gap between the two light-emitting areas 2A, and improving the lighting and display effects.

[0082] When the light-emitting unit 2 does not emit light, a reverse voltage is applied between the first electrode 20 and the second electrode 22, and a reverse voltage is applied between the third electrode 40 and the fourth electrode 42. The electric field directions at the first conductive dye particles Q1 and the second conductive dye particles Q2 are from the substrate 1 towards the second electrode 22. The first conductive dye particles Q1 move towards the second electrode 22, and the second conductive dye particles Q2 move towards the substrate 1.

[0083] See Figures 7-8 , the light-emitting device has bottom emission, the first electrode 20 is the anode, the second electrode 22 is the cathode, the first conductive dye particles Q1 are negatively charged, and the second conductive dye particles Q2 are positively charged. The first electrode lead 3 is reused as the third electrode 40.

[0084] When the light-emitting unit 2 emits light, a forward voltage is applied between the first electrode 20 and the second electrode 22, and a forward voltage is applied between the third electrode 40 and the fourth electrode 42. The electric field directions at the first conductive dye particles Q1 and the second conductive dye particles Q2 are from the second electrode 22 towards the substrate 1. The second conductive dye particles Q2 move towards the substrate 1, and the first conductive dye particles Q1 move towards the second electrode 22, thereby improving the contrast between the two light-emitting areas 2A, and improving the lighting and display effects.

[0085] When the light-emitting unit 2 does not emit light, a reverse voltage is applied between the first electrode 20 and the second electrode 22, and a reverse voltage is applied between the third electrode 40 and the fourth electrode 42. The electric field directions at the first conductive dye particles Q1 and the second conductive dye particles Q2 are from the substrate 1 towards the second electrode 22. The first conductive dye particles Q1 move towards the substrate 1, and the second conductive dye particles Q2 move towards the second electrode 22.

[0086] Optionally, on the basis of the above technical solution, the thickness of the second insulating layer 44 is matched with the voltage difference between the third electrode 40 and the fourth electrode 42, the electric field strength required by the first conductive dye particles Q1, the moving distance required by the first conductive dye particles Q1, the electric field strength required by the second conductive dye particles Q2, and the moving distance required by the second conductive dye particles Q2.

[0087] The thickness of the second insulating layer 44 can be reasonably set according to the voltage difference between the third electrode 40 and the fourth electrode 42, the electric field strength required by the first conductive dye particles Q1, the moving distance required by the first conductive dye particles Q1, the electric field strength required by the second conductive dye particles Q2, and the moving distance required by the second conductive dye particles Q2.

[0088] Optionally, on the basis of the above technical solution, as Figures 5-8 shown, the fourth electrode 42 is electrically connected to the second electrode 22.

[0089] The fourth electrode 42 and the second electrode 22 are connected. The fourth electrode 42 and the second electrode 22 can use the same external power signal source, thus simplifying the structural setting of the light-emitting device and reducing the manufacturing cost.

[0090] An embodiment of the present invention also provides a light-emitting screen body. Refer to Figure 9 , Figure 9 which is a schematic structural diagram of a light-emitting screen body provided according to an embodiment of the present invention. The light-emitting screen body includes the light-emitting device described in any of the above embodiments. The light-emitting device includes a light-emitting area 2A and a non-light-emitting area 2B. The electrophoretic microcapsule structure of the light-emitting device is located in the non-light-emitting area 2B.

[0091] In this embodiment, an electrophoretic microcapsule structure 4 is provided in the gap (non-light-emitting area 2B) between the light-emitting areas 2A. By setting the cooperation relationship between the electric field directions of the first conductive dye particles Q1 and the second conductive dye particles Q2 in the electrophoretic microcapsule structure 4 located in the non-light-emitting area 2B and the light-emitting direction of the light-emitting unit 2, the aperture ratio of the light-emitting device when the light-emitting unit 2 emits light can be improved, the gap between the two light-emitting areas 2A can be reduced, or the contrast ratio between the two light-emitting areas 2A can be improved, thereby improving the illumination and display effects of the light-emitting device. Among them, the first conductive dye particles Q1 and the second conductive dye particles Q2 can move in the transparent capsule T0 under the action of an electric field, ensuring the reliability of the electrophoretic microcapsule 41 to improve the illumination and display effects.

[0092] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this application can be achieved. This is not limited herein.

[0093] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A light-emitting device, characterized in that, Comprising: A substrate, the substrate comprising a light-emitting region and a non-light-emitting region located on one side of the light-emitting region; A light-emitting unit, the light-emitting unit being located in the light-emitting region, the light-emitting unit comprising a stack of a first electrode, a light-emitting device layer, and a second electrode, the first electrode being located on the surface of the substrate; A first electrode lead, the first electrode lead being located in the non-light-emitting region and electrically connected to the first electrode; An electronic paper microcapsule structure, the electronic paper microcapsule structure being located in the non-light-emitting region, the electronic paper microcapsule structure comprising a transparent capsule, a third electrode, at least one electronic paper microcapsule, and a fourth electrode, the electronic paper microcapsule comprising a first conductive dye particle and a second conductive dye particle, the transparent capsule being used for placing the first conductive dye particle and the second conductive dye particle, the colors of the first conductive dye particle and the second conductive dye particle being different, and the color of the first conductive dye particle being the same as the light-emitting color of the light-emitting unit; The light-emitting device layer covers the light-emitting region and the non-light-emitting region; The electronic paper microcapsule structure further comprises a second insulating layer and a third insulating layer; The fourth electrode is located on the surface of the substrate; The electronic paper microcapsule structure is located on the surface of the fourth electrode away from the substrate; The second insulating layer covers the electronic paper microcapsule structure; The third electrode is located on the surface of the second insulating layer away from the electronic paper microcapsule structure; The third insulating layer is located on the surface of the third electrode away from the second insulating layer, and the third insulating layer covers the third electrode.

2. The light-emitting device according to claim 1, characterized in that, The first electrode lead is multiplexed as the third electrode conductive dye particles conductive dye particles conductive dye particles.

3. The light-emitting device according to claim 1, characterized in that, The orthographic projection of the second insulating layer on the substrate and the orthographic projection of the non-light-emitting region on the substrate overlap; The voltages of the fourth electrode and the second electrode are the same.

4. The light-emitting device according to claim 3, characterized in that, The light-emitting device is bottom-emitting, the first electrode is an anode, and the second electrode is a cathode.

5. The light-emitting device according to claim 3, characterized in that, The thickness of the second insulating layer is matched with the voltage difference between the third electrode and the fourth electrode, the electric field strength required by the first conductive dye particle, the moving distance required by the first conductive dye particle, the electric field strength required by the second conductive dye particle, and the moving distance required by the second conductive dye particle.

6. The light-emitting device according to any one of claims 3 - 5, characterized in that, The fourth electrode and the second electrode are electrically connected.

7. A light-emitting screen body, characterized in that, Comprising the light-emitting device according to any one of claims 1-6; The light-emitting device comprises a light-emitting region and a non-light-emitting region, and the electronic paper microcapsule structure of the light-emitting device is located in the non-light-emitting region.

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