Display panel and display device

Abstract

The present invention relates to a display panel and a display device. The display panel includes a driving backplane and a light-emitting unit arranged at intervals on the driving backplane. The light-emitting unit includes at least two conductive shading columns, a color conversion unit and a light-emitting device. Among them, at least two conductive shading columns form a storage cavity. The color conversion unit is arranged in the storage cavity. The light-emitting device is located on a side of the color conversion unit away from the driving backplane and covers the storage cavity. In the display panel, at least two conductive columns can be used as electrodes of the light-emitting unit, can also realize the binding between the light-emitting device and the driving backplane, and can also prevent cross-light between two adjacent color conversion units, thereby improving the display effect of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] The display panel usually includes a plurality of light-emitting units, and the display of the picture is realized by emitting light from the plurality of light-emitting units.

[0003] In conventional technology, a plurality of light-emitting units of a display panel are usually arranged in an array, wherein each light-emitting unit includes a light-emitting device and a color conversion unit.

[0004] The applicant discovered during the process of implementing the conventional technology that crosstalk is likely to occur between two adjacent color conversion units of the display panel in the conventional technology. Summary of the invention

[0005] Based on this, it is necessary to provide a display panel and a display device to address the problem of easy crosstalk between two adjacent color conversion units of a micro LED display panel in the traditional technology.

[0006] A display panel, comprising:

[0007] A driving backplane, comprising a substrate and a driving circuit arranged on the substrate;

[0008] A plurality of light-emitting units are arranged at intervals on the driving backplane and driven to emit light by the driving circuit;

[0009] The light emitting unit comprises:

[0010] At least two conductive light-shielding columns are disposed on the driving back plate, and there is a gap between at least two of the conductive light-shielding columns, and the gap constitutes a receiving cavity;

[0011] A color conversion unit, located in the receiving cavity;

[0012] The light emitting device is located on a side of the color conversion unit away from the driving backplane, the light emitting device is electrically connected to the driving backplane through the conductive light shielding column, and the orthographic projection of the light emitting device on the driving backplane covers the orthographic projection of the storage cavity on the driving backplane.

[0013] In one embodiment, at least two of the conductive light-shielding columns are disposed around the color conversion unit to form an annular conductive light-shielding layer.

[0014] In one of the embodiments, the annular conductive light-shielding layer includes at least two openings, and the openings are used to insulate at least two of the conductive light-shielding pillars.

[0015] In one embodiment, an angle between a line connecting the at least two openings and an arrangement direction of the plurality of light emitting units is an acute angle.

[0016] In one embodiment, the annular conductive light-shielding layer is a closed ring, and the at least two conductive light-shielding columns are connected.

[0017] In one of the embodiments, the light-emitting unit includes a reflective layer, the reflective layer is located on a side of the light-emitting device away from the driving backplane, and the orthographic projection of the reflective layer on the driving backplane covers the orthographic projection of the light-emitting device on the driving backplane.

[0018] In one of the embodiments, the light emitting unit further includes a light shielding layer disposed around the color conversion unit, and the light shielding layer and the at least two conductive light shielding columns surround the color conversion unit to form the annular conductive light shielding layer.

[0019] In one of the embodiments, along the direction from the driving backplane to the light-emitting device, the thickness of the conductive light-shielding column is greater than the thickness of the color conversion unit.

[0020] In one embodiment, the light emitting unit further comprises:

[0021] The filter layer is located in the receiving cavity and between the color conversion unit and the driving back plate.

[0022] A display device comprises a display panel as described in any one of the above embodiments.

[0023] The above-mentioned display panel and display device include a driving backplane and a light-emitting unit arranged at intervals on the driving backplane. The light-emitting unit includes at least two conductive shading columns, a color conversion unit and a light-emitting device. Among them, at least two conductive shading columns form a storage cavity. The color conversion unit is arranged in the storage cavity. The light-emitting device is located on the side of the color conversion unit away from the driving backplane and covers the storage cavity. In the display panel, at least two conductive columns can serve as electrodes of the light-emitting unit, can also realize the binding between the light-emitting device and the driving backplane, and can also prevent cross-light between two adjacent color conversion units, thereby improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1This is a schematic diagram of the cross-sectional structure of an LED chip in one embodiment of the present application;

[0026] Figure 2 This is a schematic cross-sectional structure diagram of an LED chip in another embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of a display panel in one embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of a top view of a display panel in one embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of a top view of a display panel in another embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of a top view of the structure of the first conductive light-shielding layer and the second conductive light-shielding layer in one embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of the arrangement of the light-emitting units of the display panel in one embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of the arrangement of the light-emitting units of the display panel in another embodiment of the present application;

[0033] Fig. 9 This is a schematic cross-sectional structure diagram of a display panel in another embodiment of the present application;

[0034] Fig.10 This is a schematic diagram of a top view of a display panel in another embodiment of the present application;

[0035] Fig.11 This is a schematic cross-sectional structure diagram of a display panel in yet another embodiment of the present application;

[0036] Fig.12 This is a schematic cross-sectional structure diagram of a display panel in yet another embodiment of the present application;

[0037] Fig.13 This is a schematic diagram of a top view of a display panel in another embodiment of the present application;

[0038] Fig.14 This is a schematic diagram of a top view of the structure of the first conductive light-shielding layer and the second conductive light-shielding layer in another embodiment of the present application;

[0039] Fig.15 This is a schematic diagram of the arrangement of light-emitting units of a display panel in another embodiment of the present application;

[0040] Fig.16 This is a schematic diagram of the arrangement of light-emitting units of a display panel in another embodiment of the present application;

[0041] Fig.17 This is a schematic cross-sectional structure diagram of a display panel in yet another embodiment of the present application;

[0042] Fig.18 This is a schematic diagram of a top view of a display panel in another embodiment of the present application;

[0043] Fig.19 FIG. 4 is a schematic cross-sectional structure diagram of a display panel in yet another embodiment of the present application.

[0044] The meanings of the figures are as follows:

[0045] 10. display panel; 12. first direction; 14. second direction; 101. driving backplane; 102. light-emitting unit; 120. light-emitting device; 1202. first electrode; 1204. second electrode; 122. N-type gallium nitride layer; 124. multi-quantum well layer; 126. P-type gallium nitride layer; 1302. first opening; 1304. second opening; 132. first conductive shading column; 134. second conductive shading column; 140. color conversion unit; 150. shading layer; 160. reflective layer; 170. filter layer; 180. cover plate. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0047] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] A display panel is an electronic device that uses a light-emitting device to emit light, and a color conversion unit converts the light emitted by the light-emitting device to obtain the three primary colors of red, green and blue, and realizes display through the combination of the three primary colors of red, green and blue. The light-emitting device here can be a micro-LED (Micro-LED, micro light-emitting diode) chip or an LED chip.

[0050] In the following embodiments of the present application, the technical solution of the present application is described by taking the light-emitting device 120 as an LED chip as an example. It should be noted that the use of an LED chip as the light-emitting device 120 is only one embodiment of the present application. In other embodiments, the light-emitting device 120 can also be an LCD (Liquid Crystal Display) or an OLED (Organic Light-Emitting Diode) device, which will not be repeated. The inventive concept of the present application is: a storage cavity is formed by at least two conductive shading columns, a color conversion unit is arranged in the storage cavity, and the light-emitting device 120 is electrically connected to the conductive shading column and covers the storage cavity. In this way, while the conductive shading column realizes the conductive function and binding function of the electrode, it can also avoid cross-light between adjacent color conversion units. Therefore, all embodiments that conform to the inventive concept of the present application should be understood to be within the scope of protection of the present application.

[0051] Before describing the embodiments of the present application, the structure of the LED chip is first described. Figure 1 and Figure 2As shown, the structure of the LED chip includes a flip-chip structure, a face-up structure, and a vertical structure. The LED chip includes an N-type gallium nitride layer 122, a P-type gallium nitride layer 126, and a multi-quantum well layer 124 located between the N-type gallium nitride layer 122 and the P-type gallium nitride layer 126. When the LED chip is powered on, the N-type gallium nitride layer 122 will generate electrons, and the P-type gallium nitride layer 126 will generate holes. The electrons and holes move in a directional manner under the action of the electric field, and recombine in the multi-quantum well layer 124 to release energy, and the LED chip can emit light at this time. The N-type gallium nitride layer 122 is connected to the first electrode 1202, and the P-type gallium nitride layer 126 is connected to the second electrode 1204, so that the light-emitting device 120 can be powered on to emit light.

[0052] In the flip-chip structure and the face-up structure, the first electrode 1202 and the second electrode 1204 are located on the same side of the light emitting device 120. Figure 1 As shown. Figure 2 In the vertical structure shown, the first electrode 1202 and the second electrode 1204 are located on different sides of the light emitting device 120 .

[0053] Generally speaking, the display panel 10 using the light emitting device 120 has two structures: top-emitting and bottom-emitting. The display panel 10 of the present application is described below from the perspective of these two different structures.

[0054] For a bottom-emitting display panel 10:

[0055] In one embodiment, Figure 3 As shown, the present application provides a display panel 10, including a driving backplane 101 and a plurality of light emitting units 102 disposed on the driving backplane 101. Here, bottom emission means that when the display panel 10 emits light, the light emitted by the light emitting unit 102 is emitted through the driving backplane 101.

[0056] Specifically, the driving backplane 101 generally includes a substrate and a driving circuit located on the substrate. The substrate may be a flexible substrate made of polyimide film or a rigid substrate, which is not limited here. The driving circuit refers to a circuit composed of a thin film transistor and a capacitor. Generally speaking, a driving circuit may include two or more thin film transistors and one or more capacitors. The driving circuit is used to drive the light emitting device 120, so that the light emitting device 120 emits light.

[0057] A plurality of light emitting units 102 are disposed at intervals on the driving backplane 101. Generally speaking, the plurality of light emitting units 102 can be arranged in an array on the driving backplane 101. The light emitting units 102 are used to emit red light, green light or blue light under the drive of the driving circuit, thereby realizing the display of the display panel 10 by compounding the three primary colors.

[0058] The display panel 10 of the present application, its light emitting unit 102 may include at least two conductive light shielding columns. In this embodiment, two conductive light shielding columns are taken as an example, that is, Figure 3 As shown in FIG. 1 , the light emitting unit 102 includes a first conductive light shielding column 132 and a second conductive light shielding column 134. The light emitting unit 102 may further include a color conversion unit 140 and a light emitting device 120. Figure 3 and Figure 4 As shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are both disposed on the driving backplane 101, and there is a gap between the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the gap forms a receiving cavity. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be an opaque total reflection film layer. Here, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be an opaque total reflection metal layer formed by silver or gold or indium.

[0059] The color conversion unit 140 is located in the storage cavity, and is used to convert the color of the light emitted by the light emitting device 120. Generally speaking, the light emitting device 120 can emit blue light or ultraviolet light, and the color conversion unit 140 is used to convert the blue light or ultraviolet light into red light, green light and blue light. Taking the light emitting device 120 that can emit blue light as an example, generally speaking, the color conversion unit 140 can include a red conversion unit, a green conversion unit and a transparent conversion unit. Among them, the red conversion unit can convert the blue light emitted by the light emitting device 120 into red; the green light conversion unit can convert the blue light emitted by the light emitting device 120 into green light; and the transparent conversion unit can transmit blue light. The color conversion unit 140 can be made of quantum dot color conversion material.

[0060] The light emitting device 120 is arranged on a side of the color conversion unit 140 away from the driving backplane 101, and is electrically connected to the driving backplane 101 through the first conductive light shielding column 132 and the second conductive light shielding column 134, so that the driving circuit outputs a driving current to the light emitting device 120. As known from the above description, the light emitting device 120 needs to be electrically connected with the first electrode 1202 and the second electrode 1204. Here, in addition to forming a storage cavity, the first conductive light shielding column 132 and the second conductive light shielding column 134 can also serve as electrodes of the light emitting device 120 and realize the binding of the light emitting device 120 with the driving backplane 101. It can be understood that in some other embodiments, the first electrode 1202 and the second electrode 1204 of the light emitting device 120 can be bound to the driving backplane 101 through the first conductive light shielding column 132 and the second conductive light shielding column 134, and at this time, the first conductive light shielding column 132 and the second conductive light shielding column 134 can be used as a solder layer to realize the binding effect.

[0061] In this embodiment, the light emitting device 120 is also located on a side of the color conversion unit 140 away from the driving backplane 101. The orthographic projection of the light emitting device 120 on the driving backplane 101 covers the orthographic projection of the storage cavity on the driving backplane 101, that is, the orthographic projection of the light emitting device 120 on the driving backplane 101 covers the orthographic projection of the color conversion unit 140 on the driving backplane 101. In this way, when the light emitting device 120 emits light, the light emitted by the light emitting device 120 can be converted by the color conversion unit 140 and then emitted from the driving backplane 101, thereby forming a bottom-emitting display panel 10.

[0062] More specifically, the display panel 10 includes a driving backplane 101 and a light-emitting unit 102 located on the driving backplane 101. The light-emitting unit 102 includes a first conductive light-shielding column 132 and a second conductive light-shielding column 134 located on the driving backplane 101. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 surround a storage cavity. The light-emitting unit 102 also includes a color conversion unit 140 disposed in the storage cavity, and a light-emitting device 120 electrically connected to the first conductive light-shielding column 132 and the second conductive light-shielding column 134 and covering the storage cavity. When the display panel 10 is working, the driving circuit on the driving backplane 101 works and outputs a driving current. The driving current can be input into the light-emitting device 120 from the first conductive light-shielding column 132 or the second conductive light-shielding column 134. At this time, the light-emitting device 120 emits light. The light emitted by the light-emitting device 120 is converted by the color conversion unit 140 and then emitted from the driving backplane 101.

[0063] In this embodiment, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be made of opaque total reflection material. In this way, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be used as electrodes for both conduction and light shielding. When the color conversion unit 140 located in the storage cavity performs color conversion, crosstalk between two adjacent color conversion units 140 can be avoided, thereby improving the display effect of the display panel 10. At the same time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can also realize the binding between the driving backplane 101 and the light-emitting device 120, so that multiple functions can be realized by preparing a conductive light-shielding column once.

[0064] It should be understood that in the above embodiment, only the embodiment in which the light emitting unit 102 includes two conductive light-shielding columns, namely the first conductive light-shielding column 132 and the second conductive light-shielding column 134 is described. In other embodiments, the light emitting unit 102 may further include a third conductive light-shielding column and a fourth conductive light-shielding column, etc. This is an improvement that can be made by those skilled in the art according to the technical solution of the present application, and it should also be understood to be within the scope of protection of the present application. No further elaboration will be given.

[0065] In one embodiment, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are disposed around the color conversion unit 140 and form an annular conductive light-shielding layer.

[0066] Specifically, a gap is provided between the first conductive light shielding column 132 and the second conductive light shielding column 134 to form a receiving cavity, and the color conversion unit 140 is disposed in the receiving cavity. Here, the first conductive light shielding column 132 and the second conductive light shielding column 134 are arranged in a ring shape and are used for conducting, binding and shielding.

[0067] The structure of the display panel 10 of the present application is described below in combination with different structures of the light emitting device 120 .

[0068] In one embodiment, when the bottom-emitting display panel 10 has a light-emitting device 120, Figure 1 When the structure shown is used, for example, a front-mounted structure is adopted, that is, the light-emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on the same side when electricity is supplied.

[0069] like Figure 4 As shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are insulated from each other, and an opaque light-shielding layer 150 is disposed between the first conductive light-shielding column 132 and the second conductive light-shielding column 134. The light-shielding layer 150 is disposed around the color conversion unit 140, so that the first conductive light-shielding column 132, the second conductive light-shielding column 134 and the light-shielding layer 150 surround the color conversion unit 140 to form a ring-shaped conductive light-shielding layer.

[0070] Specifically, in this embodiment, one of the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be connected to the driving circuit on the driving backplane 101, and the other of the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be connected to the ground line. That is, one of the first conductive light-shielding column 132 and the second conductive light-shielding column 134 serves as the above-mentioned first electrode 1202, and the other of the first conductive light-shielding column 132 and the second conductive light-shielding column 134 serves as the above-mentioned second electrode 1204. In this way, when the driving circuit is working, the light-emitting device 120 is connected between the driving circuit and the ground line, thereby realizing the light emission of the light-emitting device 120. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 should be insulated from each other to avoid short circuit. In this embodiment, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are insulated from each other, and the gap between the two forms a storage cavity. The color conversion unit 140 is arranged in the storage cavity. In order to avoid light crosstalk between two adjacent color conversion units 140, an opaque and insulating light shielding layer 150 may be provided between the first conductive light shielding column 132 and the second conductive light shielding column 134. The light shielding layer 150 and the first conductive light shielding column 132 and the second conductive light shielding column 134 surround the color conversion unit 140 to form an annular conductive light shielding layer, so that when the color conversion unit 140 converts light colors, light crosstalk does not occur.

[0071] In one embodiment, when the bottom-emitting display panel 10, the light-emitting device 120 adopts Figure 1 When the structure shown is used, for example, a front-mounted structure is adopted, that is, when the light-emitting device 120 is powered on to emit light through the first electrode 1202 and the second electrode 1204 located on the same side:

[0072] like Figure 5 and Figure 6 As shown, the annular conductive light shielding layer formed by at least two conductive light shielding pillars includes at least two openings. In this embodiment, the annular conductive light shielding layer includes two openings as an example for description. For ease of description, the two openings are named as the first opening 1302 and the second opening 1304, respectively. That is, there is a first opening 1302 and a second opening 1304 between the first conductive light shielding pillar 132 and the second conductive light shielding pillar 134, so that the first conductive light shielding pillar 132 and the second conductive light shielding pillar 134 are insulated from each other. Figure 7 As shown, the plurality of light emitting units 102 are arranged on the driving backplane 101 along a first direction 12 and a second direction 14 that are perpendicular to each other; a third direction from the first opening 1302 to the second opening 1304 deviates from the first direction 12 and the second direction 14 .

[0073] Specifically, in this embodiment, the light emitting device 120 needs to be connected between the driving circuit and the ground line through the first conductive light-shielding column 132 and the second conductive light-shielding column 134. Therefore, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 should be insulated from each other to avoid short circuit. In this embodiment, by providing a first opening 1302 and a second opening 1304 between the first conductive light-shielding column 132 and the second conductive light-shielding column 134, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are separated by the first opening 1302 and the second opening 1304, so as to achieve the purpose of insulation.

[0074] In order to avoid cross-talk between two adjacent color conversion units 140 at the openings, at least two openings of the annular conductive light shielding layer should satisfy: the angle between the connecting line of the at least two openings and the arrangement direction of the plurality of light-emitting units is an acute angle. Still taking the annular conductive light shielding layer including the first opening 1302 and the second opening 1304 as an example, the positions of the first opening 1302 and the second opening 1304 should satisfy the following conditions:

[0075] The plurality of light emitting units 102 are arranged on the driving backplane 101 along a first direction 12 and a second direction 14 that are perpendicular to each other; a third direction from the first opening 1302 to the second opening 1304 deviates from the first direction 12 and the second direction 14. In other words, the angle between the line connecting the first opening 1302 and the second opening 1304 and the arrangement direction of the plurality of light emitting units 102 is an acute angle.

[0076] Generally speaking, the plurality of light-emitting units 102 are distributed in an array on the driving backplane 101, that is, in rows and columns. We name the direction in which the plurality of light-emitting units 102 are distributed in rows as the first direction 12; and the direction in which the plurality of light-emitting units 102 are distributed in columns as the second direction 14. Therefore, the first direction 12 and the second direction 14 are perpendicular to each other. Here, the direction pointing from a first opening 1302 to a second opening 1304 is named the third direction. To prevent light crosstalk, the third direction should deviate from the first direction 12 and the second direction 14. At this time, the third direction is an acute angle with the first direction 12 and the second direction 14. In this way, the first opening 1302 and the second opening 1304 in two adjacent light-emitting units 102 can be staggered, thereby preventing light crosstalk between two adjacent color conversion units 140.

[0077] Furthermore, the widths of the first opening 1302 and the second opening 1304 may also satisfy the following conditions:

[0078] If the color conversion unit 140 is polygonal, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the side where the first opening 1302 and the second opening 1304 are located. If the color conversion unit 140 is circular, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the diameter of the circular color conversion unit 140. If the color conversion unit 140 is elliptical, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the short axis of the elliptical color conversion unit 140.

[0079] It should be understood that the purpose of the present embodiment is to insulate the first conductive light-shielding column 132 from the second conductive light-shielding column 134 and prevent crosstalk between two adjacent color conversion units 140 by limiting the positional relationship between the first opening 1302 and the second opening 1304 . Figure 7 This is only a schematic diagram of the arrangement of the light-emitting unit 102 on the driver backplane 101 in one embodiment of the present application, and its purpose is to intuitively reflect the positional relationship between the first opening 1302 and the second opening 1304 relative to the color conversion unit 140. Any embodiment that conforms to the inventive concept of the present application should be understood to be within the scope of protection of the present application. For example, in some embodiments, the arrangement schematic diagram of the light-emitting unit 102 on the driver backplane 101 can also be as follows: Figure 8 As shown. Figure 8 In the illustrated embodiment, the three color conversion units 140 may be a red conversion unit, a green conversion unit, and a transparent conversion unit, respectively, which will not be described in detail.

[0080] In the above embodiment, only the embodiment in which the light emitting unit 102 includes the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the first opening 1302 and the second opening 1304 are provided between the first conductive light-shielding column 132 and the second conductive light-shielding column 134 is described. In other embodiments, the light emitting unit 102 may further include a third conductive light-shielding column and a third opening, which will not be described in detail.

[0081] In one embodiment, when the bottom-emitting display panel 10 has a light-emitting device 120, Figure 2 When the vertical structure is shown, that is, the light emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on different sides:

[0082] like Fig. 9 As shown, the display panel 10 of the present application further includes a reflective layer 160. The reflective layer 160 is disposed on a side of the light emitting device 120 away from the first conductive light shielding column 132 and the second conductive light shielding column 134, and the reflective layer 160 is an opaque total reflective film layer.

[0083] Specifically, in this embodiment, the light emitting device 120 can be connected to the driving circuit on the driving backplane 101 through the first conductive light shielding column 132 and / or the second conductive light shielding column 134. The light emitting device 120 can also be connected to the ground line through the reflective layer 160. That is, the first conductive light shielding column 132 and the second conductive light shielding column 134 serve as the first electrode 1202 of the light emitting device 120; the reflective layer 160 serves as the second electrode 1204 of the light emitting device 120. In this way, when the driving circuit is working, the light emitting device 120 is connected between the driving circuit and the ground line, so that the light emitting device 120 emits light.

[0084] Here, the reflective layer 160 may be an opaque total reflective film layer, so that when the light emitting device 120 emits light, the reflective layer 160 can reflect the light emitted by the light emitting device 120 to the color conversion unit 140 located in the receiving cavity.

[0085] Further, such as Fig. 9 and Fig.10 As shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are connected to form a closed ring structure. The orthographic projection of the reflective layer 160 on the driving backplane covers the orthographic projection of the receiving cavity on the driving backplane.

[0086] Specifically, the light emitting device 120 adopts Figure 2 In the vertical structure shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are both connected to the N-type gallium nitride layer 122 as the first electrode 1202. Therefore, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be electrically connected or not electrically connected. In order to improve the light-shielding ability of the first conductive light-shielding column 132 and the second conductive light-shielding column 134, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be connected to form a conductive layer. At this time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 form a closed storage cavity. The color conversion unit 140 is placed in the storage cavity.

[0087] The orthographic projection of the reflective layer 160 on the driving backplane 101 can cover the orthographic projection of the light emitting device 120 on the driving backplane 101, that is, the reflective layer 160 can cover the light emitting device 120, so that all the light emitted by the light emitting device 120 toward the reflective layer 160 is emitted into the storage cavity. Using an opaque total reflection film layer as the first conductive light-shielding column 132, the second conductive light-shielding column 134 and the reflective layer 160 can make the light emitted by the light emitting device 120 propagate only along the light emitting direction of the display panel 10, thereby improving the display effect of the display panel 10.

[0088] In another embodiment, when the light emitting device 120 of the bottom-emitting display panel 10 adopts a flip-chip structure, that is, the light emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on the same side:

[0089] like Fig. 9 As shown, the display panel 10 of the present application may also include a reflective layer 160. The reflective layer 160 is disposed on a side of the light-emitting device 120 away from the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the reflective layer 160 is an opaque total reflection film layer. At this time, the reflective layer 160 may cover the light-emitting device 120, and the reflective layer 160 is only used to reflect the light emitted by the light-emitting device 120, and is not used as an electrode. It can be understood that at this time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 may be used as electrodes of the light-emitting device 120, or may not be used as electrodes but used to achieve binding between the driving backplane 101 and the electrodes of the light-emitting device 120.

[0090] In one embodiment, Fig.11 As shown, the display panel 10 of the present application further includes: a filter layer 170 .

[0091] Specifically, the filter layer 170 is used to filter the light emitted by the color conversion unit 140. As known from the above description, the color conversion unit 140 can emit green light, red light and blue light. Here, in order to prevent the chromaticity of the light emitted by the color conversion unit 140 from being impure, the filter layer 170 can be used to filter the light. Therefore, the filter layer 170 can also include a green light filter unit, a red light filter unit and a blue light filter unit. The filter layer 170 is arranged in the storage cavity, corresponding to the color conversion unit 140, and is located on the side of the color conversion unit 140 away from the light-emitting device 120.

[0092] For a top-emitting display panel 10:

[0093] In one embodiment, Fig.12 As shown, the present application provides a display panel 10, including a driving backplane 101 and a plurality of light emitting units 102 disposed on the driving backplane 101. Here, top emission means that when the display panel 10 emits light, the light emitted by the light emitting unit 102 is emitted away from the driving backplane 101.

[0094] Specifically, the driving backplane 101 generally includes a substrate and a driving circuit located on the substrate. The specific configuration is the same as that of the above embodiment and will not be described in detail here.

[0095] A plurality of light emitting units 102 are disposed at intervals on the driving backplane 101. Generally speaking, the plurality of light emitting units 102 can be arranged in an array on the driving backplane 101. The light emitting units 102 are used to emit red light, green light or blue light under the drive of the driving circuit, thereby realizing the display of the display panel 10 by compounding the three primary colors.

[0096] The display panel 10 of the present application, its light emitting unit 102 may include at least two conductive light shielding columns. In this embodiment, two conductive light shielding columns are taken as an example, that is, Fig.12 As shown in , the light emitting unit 102 may include a first conductive light shielding column 132 and a second conductive light shielding column 134. The light emitting unit 102 may also include a color conversion unit 140 and a light emitting device 120. Fig.12 and Fig.13 As shown, the light emitting device 120 is disposed on the substrate of the driving backplane 101. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 are both disposed on the light emitting device 120, and there is a gap between the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the gap forms a storage cavity. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be an opaque total reflection film layer. Here, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be an opaque total reflection metal layer formed by silver or gold or indium.

[0097] The color conversion unit 140 is located in the receiving cavity and is used to convert the color of the light emitted by the light emitting device 120. This part is the same as the above-mentioned embodiment of the bottom-emitting display panel and will not be described in detail.

[0098] As known from the above description, the light emitting device 120 needs to be electrically connected to the first electrode 1202 and the second electrode 1204. In addition to forming a receiving cavity, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can also serve as electrodes of the light emitting device 120. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be connected between the driving circuit and the light emitting device 120, so that the driving circuit outputs a driving current to the light emitting device 120. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 can also only form a receiving cavity, and not serve as electrodes of the light emitting device.

[0099] In this embodiment, the light-emitting device 120 is also located on a side of the color conversion unit 140 close to the driving backplane 101, so that when the light-emitting device 120 emits light, the light emitted by the LED can be converted by the color conversion unit 140 and then emitted from a direction away from the driving backplane 101, thereby forming a top-emitting display panel 10.

[0100] More specifically, the display panel 10 includes a driving backplane 101 and a light-emitting unit 102 located on the driving backplane 101. The light-emitting unit 102 includes a light-emitting device 120 located on the driving backplane 101, and a first conductive light-shielding column 132 and a second conductive light-shielding column 134 disposed on the light-emitting device 120. The first conductive light-shielding column 132 and the second conductive light-shielding column 134 surround a storage cavity. The light-emitting unit 102 also includes a color conversion unit 140 disposed in the storage cavity. When the display panel 10 is working, the driving circuit on the driving backplane 101 works and outputs a driving current. The driving current can be input into the light-emitting device 120 from the first conductive light-shielding column 132 or the second conductive light-shielding column 134. At this time, the light-emitting device 120 emits light. The light emitted by the light-emitting device 120 is converted by the color conversion unit 140 and then emitted from a direction away from the driving backplane 101.

[0101] In this embodiment, the first conductive light shielding column 132 and the second conductive light shielding column 134 can be made of opaque total reflection material. In this way, the first conductive light shielding column 132 and the second conductive light shielding column 134 can be used as electrodes for both conducting electricity and shielding light. When the color conversion unit 140 located in the storage cavity performs color conversion, crosstalk between two adjacent color conversion units 140 can be avoided, thereby improving the display effect of the display panel 10.

[0102] It should be understood that in the above embodiment, only the embodiment in which the light emitting unit 102 includes two conductive light-shielding columns, namely the first conductive light-shielding column 132 and the second conductive light-shielding column 134 is described. In other embodiments, the light emitting unit 102 may further include a third conductive light-shielding column and a fourth conductive light-shielding column, etc. This is an improvement that can be made by those skilled in the art according to the technical solution of the present application, and it should also be understood to be within the scope of protection of the present application. No further elaboration will be given.

[0103] In one embodiment, the first conductive light-shielding pillar 132 and the second conductive light-shielding pillar 134 surround the color conversion unit 140 to form an annular light-shielding conductive layer.

[0104] Specifically, a gap is provided between the first conductive light shielding column 132 and the second conductive light shielding column 134 to form a receiving cavity, and the color conversion unit 140 is disposed in the receiving cavity. Here, the first conductive light shielding column 132 and the second conductive light shielding column 134 are arranged in a ring shape and are used for conducting electricity and shielding light.

[0105] The structure of the display panel 10 of the present application is described below in combination with different structures of the light emitting device 120 .

[0106] In one embodiment, when the top-emitting display panel 10, referring to Fig.12When the light emitting device 120 adopts a positive structure, that is, when the light emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on the same side: it can be understood that at this time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can only be used to enclose and form a receiving cavity.

[0107] like Fig.13 As shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are insulated from each other, and an opaque light-shielding layer 150 is disposed between the first conductive light-shielding column 132 and the second conductive light-shielding column 134. The light-shielding layer 150 is disposed around the color conversion unit 140, so that the first conductive light-shielding column 132, the second conductive light-shielding column 134 and the light-shielding layer 150 surround the color conversion unit 140 to form an annular light-shielding conductive layer. This part is the same as the above-mentioned bottom-emitting embodiment, and will not be repeated.

[0108] In one embodiment, when the light-emitting device 120 of the top-emitting display panel 10 adopts a positive structure, that is, the light-emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on the same side: it can be understood that at this time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can only be used to enclose and form a storage cavity.

[0109] like Fig.14 As shown, the annular conductive light shielding layer formed by at least two conductive light shielding pillars includes at least two openings. In this embodiment, the annular conductive light shielding layer includes two openings as an example for description. For ease of description, the two openings are named as the first opening 1302 and the second opening 1304, respectively. That is, there is a first opening 1302 and a second opening 1304 between the first conductive light shielding pillar 132 and the second conductive light shielding pillar 134, so that the first conductive light shielding pillar 132 and the second conductive light shielding pillar 134 are insulated from each other. Fig.14 and Fig.15 As shown, the plurality of light emitting units 102 are arranged on the driving backplane 101 along a first direction 12 and a second direction 14 that are perpendicular to each other; a third direction from the first opening 1302 to the second opening 1304 deviates from the first direction 12 and the second direction 14 .

[0110] Specifically, in this embodiment, the light emitting device 120 needs to be connected between the driving circuit and the ground line through the first conductive light-shielding column 132 and the second conductive light-shielding column 134. Therefore, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 should be insulated from each other to avoid short circuit. In this embodiment, by providing a first opening 1302 and a second opening 1304 between the first conductive light-shielding column 132 and the second conductive light-shielding column 134, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are separated by the first opening 1302 and the second opening 1304, so as to achieve the purpose of insulation.

[0111] In order to avoid cross-talk between two adjacent color conversion units 140 at the openings, at least two openings of the annular conductive light shielding layer should satisfy: the angle between the connecting line of the at least two openings and the arrangement direction of the plurality of light-emitting units is an acute angle. Still taking the annular conductive light shielding layer including the first opening 1302 and the second opening 1304 as an example, the positions of the first opening 1302 and the second opening 1304 should satisfy the following conditions:

[0112] The plurality of light emitting units 102 are arranged on the driving backplane 101 along a first direction 12 and a second direction 14 that are perpendicular to each other; a third direction from the first opening 1302 to the second opening 1304 deviates from the first direction 12 and the second direction 14. In other words, the angle between the line connecting the first opening 1302 and the second opening 1304 and the arrangement direction of the plurality of light emitting units 102 is an acute angle.

[0113] Generally speaking, the plurality of light-emitting units 102 are distributed in an array on the driving backplane 101, that is, in rows and columns. We name the direction in which the plurality of light-emitting units 102 are distributed in rows as the first direction 12; and the direction in which the plurality of light-emitting units 102 are distributed in columns as the second direction 14. Therefore, the first direction 12 and the second direction 14 are perpendicular to each other. Here, the direction pointing from a first opening 1302 to a second opening 1304 is named the third direction. To prevent light crosstalk, the third direction should deviate from the first direction 12 and the second direction 14. At this time, the third direction is an acute angle with the first direction 12 and the second direction 14. In this way, the first opening 1302 and the second opening 1304 in two adjacent light-emitting units 102 can be staggered, thereby preventing light crosstalk between two adjacent color conversion units 140.

[0114] Furthermore, the widths of the first opening 1302 and the second opening 1304 may also satisfy the following conditions:

[0115] If the color conversion unit 140 is polygonal, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the side where the first opening 1302 and the second opening 1304 are located. If the color conversion unit 140 is circular, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the diameter of the circular color conversion unit 140. If the color conversion unit 140 is elliptical, the width of the first opening 1302 and the second opening 1304 should be less than 1 / 3 of the short axis of the elliptical color conversion unit 140.

[0116] It should be understood that the purpose of the present embodiment is to insulate the first conductive light-shielding column 132 from the second conductive light-shielding column 134 and prevent crosstalk between two adjacent color conversion units 140 by limiting the positional relationship between the first opening 1302 and the second opening 1304 . Fig.15This is only a schematic diagram of the arrangement of the light-emitting unit 102 on the driver backplane 101 in one embodiment of the present application, and its purpose is to intuitively reflect the positional relationship between the first opening 1302 and the second opening 1304 relative to the color conversion unit 140. Any embodiment that conforms to the inventive concept of the present application should be understood to be within the scope of protection of the present application. For example, in some embodiments, the arrangement schematic diagram of the light-emitting unit 102 on the driver backplane 101 can also be as follows: Fig.16 As shown. Fig.16 In the illustrated embodiment, the three color conversion units 140 may be a red conversion unit, a green conversion unit, and a transparent conversion unit, respectively, which will not be described in detail.

[0117] In the above embodiment, only the embodiment in which the light emitting unit 102 includes the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the first opening 1302 and the second opening 1304 are provided between the first conductive light-shielding column 132 and the second conductive light-shielding column 134 is described. In other embodiments, the light emitting unit 102 may further include a third conductive light-shielding column and a third opening, which will not be described in detail.

[0118] In one embodiment, when the top-emitting display panel 10, the light emitting device 120 is as follows Figure 2 When the vertical structure is shown, that is, the light emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on different sides:

[0119] like Fig.17 As shown, the display panel 10 of the present application further includes: a reflective layer 160. The reflective layer 160 is disposed between the light emitting device 120 and the driving backplane 101, and the reflective layer 160 is an opaque total reflective film layer.

[0120] Specifically, in this embodiment, the light emitting device 120 can be electrically connected to the driving circuit on the driving backplane 101 through the reflective layer 160. The light emitting device 120 can also be connected to the ground line through the first conductive light shielding column 132 and / or the second conductive light shielding column 134. That is, the first conductive light shielding column 132 and the second conductive light shielding column 134 serve as the first electrode 1202 of the light emitting device 120; the reflective layer 160 serves as the second electrode 1204 of the light emitting device 120. In this way, when the driving circuit is working, the light emitting device 120 is connected between the driving circuit and the ground line, thereby realizing the light emission of the light emitting device 120.

[0121] Here, the reflective layer 160 may be an opaque total reflective film layer, so that when the light emitting device 120 emits light, the reflective layer 160 can reflect the light emitted by the light emitting device 120 to the color conversion unit 140 located in the receiving cavity.

[0122] Further, such as Fig.17 and Fig.18 As shown, the first conductive light shielding column 132 and the second conductive light shielding column 134 are connected to form a closed ring structure. The orthographic projection of the reflective layer 160 on the driving back plate 101 covers the orthographic projection of the receiving cavity on the driving back plate 101, that is, the reflective layer 160 covers the receiving cavity.

[0123] Specifically, the light emitting device 120 adopts Figure 2 In the vertical structure shown, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 are both connected to the N-type gallium nitride layer 122 as the first electrode 1202. Therefore, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be electrically connected or not electrically connected. In order to improve the light-shielding ability of the first conductive light-shielding column 132 and the second conductive light-shielding column 134, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 can be connected to form a conductive layer. At this time, the first conductive light-shielding column 132 and the second conductive light-shielding column 134 form a closed storage cavity. The color conversion unit 140 is placed in the storage cavity.

[0124] The reflective layer 160 can cover the light emitting device 120, so that all the light emitted by the light emitting device 120 toward the reflective layer 160 is emitted into the receiving cavity. Using an opaque total reflection film layer as the first conductive light shielding column 132, the second conductive light shielding column 134 and the reflective layer 160 can make the light emitted by the light emitting device 120 propagate only along the light emitting direction of the display panel 10, thereby improving the display effect of the display panel 10.

[0125] In another embodiment, when the light emitting device 120 of the top-emitting display panel 10 adopts a flip-chip structure, that is, the light emitting device 120 emits light through the first electrode 1202 and the second electrode 1204 located on the same side:

[0126] like Fig.17 As shown, the display panel 10 of the present application may also include a reflective layer 160. The reflective layer 160 is disposed on a side of the light emitting device 120 away from the first conductive light-shielding column 132 and the second conductive light-shielding column 134, and the reflective layer 160 is an opaque total reflection film layer. In this case, the reflective layer 160 may cover the light emitting device 120, and the reflective layer 160 may be used to reflect the light emitted by the light emitting device 120, and is not used as an electrode.

[0127] In one embodiment, Fig.19 As shown, the display panel 10 of the present application further includes: a filter layer 170 .

[0128] Specifically, the filter layer 170 is used to filter the light emitted by the color conversion unit 140. As known from the above description, the color conversion unit 140 can emit green light, red light and blue light. Here, in order to prevent the chromaticity of the light emitted by the color conversion unit 140 from being impure, the filter layer 170 can be used to filter the light. Therefore, the filter layer 170 can also include a green light filter unit, a red light filter unit and a blue light filter unit. The filter layer 170 is arranged in the storage cavity, corresponding to the color conversion unit 140, and is located on the side of the color conversion unit 140 away from the light-emitting device 120.

[0129] Furthermore, a cover plate 180 may be provided on a side of the filter layer 170 away from the driving backplane 101 , so as to encapsulate the color conversion unit 140 and the filter layer 170 .

[0130] In one embodiment, the present application further provides a display device, including the display panel 10 in any of the above embodiments. The display device can be any product or component with a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, etc.

[0131] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: A driving backplane, comprising a substrate and a driving circuit arranged on the substrate; A plurality of light-emitting units are arranged at intervals on the driving backplane and driven to emit light by the driving circuit; The light emitting unit comprises: At least two conductive light-shielding columns are disposed on the driving back plate, and there is a gap between at least two of the conductive light-shielding columns, and the gap constitutes a receiving cavity; A color conversion unit, located in the receiving cavity; The light emitting device is located on a side of the color conversion unit away from the driving backplane, the light emitting device is electrically connected to the driving backplane through the conductive light shielding column, and the orthographic projection of the light emitting device on the driving backplane covers the orthographic projection of the storage cavity on the driving backplane.

2. The display panel according to claim 1, wherein: At least two of the conductive light-shielding columns are disposed around the color conversion unit to form an annular conductive light-shielding layer.

3. The display panel according to claim 2, wherein: The annular conductive light-shielding layer includes at least two openings, and the openings are used to insulate at least two of the conductive light-shielding columns.

4. The display panel according to claim 3, wherein: An angle between a line connecting the at least two openings and an arrangement direction of the plurality of light emitting units is an acute angle.

5. The display panel according to claim 2, wherein: The annular conductive light-shielding layer is a closed annular shape, and the at least two conductive light-shielding columns are connected.

6. The display panel according to claim 5, wherein: The light-emitting unit comprises a reflective layer, the reflective layer is located at a side of the light-emitting device away from the driving backplane, and the orthographic projection of the reflective layer on the driving backplane covers the orthographic projection of the light-emitting device on the driving backplane.

7. The display panel according to claim 2, wherein: The light-emitting unit further comprises a light-shielding layer, which is arranged around the color conversion unit. The light-shielding layer and the at least two conductive light-shielding columns surround the color conversion unit to form the annular conductive light-shielding layer.

8. The display panel according to any one of claims 1 to 7, characterized in that: Along the direction from the driving back plate to the light emitting device, the thickness of the conductive light-shielding column is greater than the thickness of the color conversion unit.

9. The display panel according to claim 8, wherein: The light emitting unit further comprises: The filter layer is located in the receiving cavity and between the color conversion unit and the driving back plate.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1 to 9.

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