Display panel

Abstract

The embodiment of the invention provides a display panel, the display panel comprises a light-emitting device, the light-emitting device comprises a plurality of light-emitting layers which are stacked, a bonding layer is arranged between two adjacent light-emitting layers, and a light reflection structure, the light reflection structure is correspondingly arranged in the bonding layer, and the light reflection structure and the bonding layer at least have a light guide surface. A reflecting layer is arranged at the edge position of the bonding layer, and light emitted by the light-emitting layer is reflected to the light guide face through the reflecting layer, is totally reflected on the light guide face and is emitted out. According to the embodiment of the invention, the reflecting layer and the light reflecting structure are arranged in the film layer of the display panel, so that the problem of serious large-angle light loss at the edge of the inner side surface of the display panel is solved, and the brightness of white light and the display effect of the panel are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of design and manufacturing of display panels, and in particular to a display panel. Background Art

[0002] Organic Light-Emitting Diode (OLED) has a series of advantages such as full solid state, self-luminescence, fast response speed, wide viewing angle, and wide operating temperature range, and has attracted more and more attention from academia and industry.

[0003] In order to further improve the luminous performance of the display panel, a silicon-based (Si) circuit substrate material is currently used as a substrate and a Si-uLED light-emitting device is further formed thereon. Compared with traditional light-emitting devices, Si-uLED has the advantages of smaller volume and higher brightness and has attracted attention. However, in the prior art, when preparing the above-mentioned light-emitting device, due to the small volume of Si-uLED, and when the smaller Si-uLED is vertically stacked and a device structure with better full-color display performance is formed, a size effect will occur. That is, as the pixel size decreases, the side area and the opening area of ​​the pixel will increase accordingly, which will lead to a significant decrease in the luminous efficiency of the light-emitting device. For example, when preparing a vertically stacked full-color panel, the luminous and display area of ​​the bottom layer is insufficient, and due to the vertical stacking structure design, the gap distance between adjacent devices will be further increased, and for the side edge position, the light cannot be used, especially for the side light at a large angle, the loss is serious, which leads to the unsatisfactory luminescence and display effect of the Si-uLED, which is not conducive to further improving the comprehensive performance of the display panel.

[0004] To sum up, in the prior art, when preparing and forming a silicon-based display panel light-emitting device, the light loss at the side edge of the silicon-based light-emitting device is serious, which leads to unsatisfactory light-emitting effect of the light-emitting device during normal operation, which is not conducive to further improving the comprehensive performance of the device. Summary of the invention

[0005] The embodiment of the present invention provides a display panel to effectively improve the problem that the light loss at the side edge position inside the existing display panel is large, and the light output and display effect of the device are not ideal.

[0006] In order to solve the above technical problems, a first aspect of an embodiment of the present invention provides a display panel, comprising: a light emitting device array arranged on a circuit substrate, wherein the light emitting device at least comprises:

[0007] A first light-emitting layer is disposed on the circuit substrate;

[0008] A first bonding layer is disposed on the first light-emitting layer;

[0009] a second light-emitting layer, disposed on the first bonding layer and electrically connected to the first light-emitting layer; and

[0010] a light reflecting structure, wherein the light reflecting structure is disposed in the first bonding layer and between the first light emitting layer and the second light emitting layer;

[0011] Wherein, the light reflective structure has at least one light guiding surface, and the light guiding surface forms an angle with the plane where the first light emitting layer and the second light emitting layer are located;

[0012] The display panel further includes a reflective layer disposed near an edge of the first bonding layer, and the reflective layer and the light guiding surface form a convergent light path.

[0013] According to one embodiment of the present invention, the light reflecting structure includes a first light guiding surface and a second light guiding surface, the same end of the first light guiding surface and the second light guiding surface are connected to form a connecting end, the connecting end points to the circuit substrate, the other end opposite to the first light guiding surface and the second light guiding surface is an open end, and the direction of the open end is the same as the light emitting direction of the light emitting device.

[0014] According to one embodiment of the present invention, the connection end formed by the intersection of the first light guiding surface and the second light guiding surface is located in the middle of the first light-emitting layer, and the inclination angle formed by the first light guiding surface and the plane where the circuit substrate is located is the same as the inclination angle formed by the second light guiding surface and the plane where the substrate is located.

[0015] According to an embodiment of the present invention, the display panel further includes a second bonding layer disposed on the second light-emitting layer, and a third light-emitting layer disposed on the second bonding layer; the reflective layer includes a first reflective layer disposed on one side of the first bonding layer, and a second reflective layer disposed on an opposite side of the first bonding layer;

[0016] Among them, the light reflecting structure is at least arranged in the first bonding layer or the second bonding layer, the second light guiding surface of the light guiding surface is close to one side of the second reflecting layer, the first light guiding surface of the light guiding surface is close to the first reflecting layer, and the light reflected by the first reflecting layer is totally reflected at the second light guiding surface, and the light reflected by the second reflecting layer is totally reflected at the first light guiding surface.

[0017] According to an embodiment of the present invention, the first bonding layer further comprises a groove, the light reflecting structure is arranged in the groove, and is arranged flush with the surface of the first bonding layer to form an inverted prism structure.

[0018] According to an embodiment of the present invention, an acute angle formed between the first reflective layer and the second reflective layer relative to the plane where the circuit substrate is located is 75°-86°.

[0019] According to an embodiment of the present invention, the refractive index of the light reflecting structure is greater than the refractive index of the first bonding layer.

[0020] According to an embodiment of the present invention, the refractive index of the light reflecting structure is 2.01-3.02, and the refractive index of the bonding layer is 1.02-1.73.

[0021] According to an embodiment of the present invention, the light reflecting structure further includes a first light reflecting structure disposed in the first bonding layer, and a second light reflecting structure disposed in the second bonding layer;

[0022] The centers of the first light reflecting structure and the second light reflecting structure are located on the same axis, and the volume of the first light reflecting structure is greater than the volume of the second light reflecting structure.

[0023] According to an embodiment of the present invention, the light emitted by the organic light emitting layer is reflected by the reflective layer to the light guiding surface, and the total reflection angle of the light on the light guiding surface is set to 34° to 50°.

[0024] Beneficial effects of the embodiments of the present invention: Compared with the prior art, the embodiments of the present application provide a display panel, which includes a light-emitting device, which includes a plurality of light-emitting layers stacked on a light-emitting path, a bonding layer arranged between two adjacent light-emitting layers, and a light-reflecting structure, wherein the light-reflecting structure is correspondingly arranged in the bonding layer, wherein a light-guiding surface is provided between the light-reflecting structure and the bonding layer, a reflective layer is arranged at the edge of the bonding layer, the light-guiding surface forms an angle with the plane where the light-emitting layer is located, and the reflective layer and the light-guiding surface form a convergent light path, and the light emitted by the light-emitting layer is reflected by the reflective layer to the light-guiding surface, where it is totally reflected and emitted. By arranging the reflective layer and the light-reflecting structure in the film layer of the display panel, a convergent light path is formed and the problem of severe light loss at large angles at the inner side edge of the display panel is reduced, thereby improving the brightness of white light and the display effect of the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1A schematic diagram of the structure of a vertically stacked full-color display panel provided in the prior art;

[0027] Figure 2 A schematic diagram of a film layer structure of a display panel provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the effect of a partial film layer structure of the display panel provided in an embodiment of the present application on light;

[0029] Figure 4 A schematic diagram of the light effect of another film layer of the display panel provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the effect of another panel on light provided in an embodiment of the present application;

[0031] Figure 6-Figure 8 This is a partial film layer structure diagram corresponding to the display panel preparation process provided in the embodiment of the present application. DETAILED DESCRIPTION

[0032] In the following detailed description, only certain embodiments of the present invention are shown and described simply by way of illustration. As those skilled in the art will appreciate, the embodiments described herein may be modified in various ways without departing from the spirit or scope of the present invention.

[0033] In the drawings, the thickness of layers, films, panels, regions, etc. may be exaggerated for clarity and for better understanding and ease of description. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present.

[0034] In addition, unless explicitly described to the contrary, the word "comprise" and its variations like "include" or "contain" will be understood to imply the inclusion of the discussed elements, but not necessarily the exclusion of other elements. Further, in the specification, the word "on..." refers to placement above or below an object part, and does not necessarily mean placement on the upper side of an object part based on the direction of gravity.

[0035] It will be understood that although the terms "first", "second", etc. may be used herein to describe various components, these components should not be limited by these terms. These components are only used to distinguish one component from another.

[0036] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0037] It will also be understood that the terms “comprises” and / or “comprising” as used herein specify the presence of stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0038] It will be understood that when a layer, region or component is referred to as being “formed on” another layer, region or component, it may be directly or indirectly formed on the other layer, region or component. For example, intervening layers, regions or components may be present.

[0039] In the following examples, the x-axis, y-axis, and z-axis are not limited to the three axes of the rectangular coordinate system and can be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other.

[0040] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of the vertically stacked full-color display panel provided in the prior art. When preparing the above-mentioned display panel, the display panel 100 includes a plurality of pixel units 20, and each pixel unit 20 also includes a red light-emitting layer 102 arranged on a silicon substrate 101, a green light-emitting layer 103 arranged on the red light-emitting layer 102, and a blue light-emitting layer 104 arranged on the green light-emitting layer 103. The above-mentioned organic red light-emitting layer 102, green light-emitting layer 103 and blue light-emitting layer 104 are stacked in sequence to form a vertical stacking structure to improve its display effect. However, due to the small size of the display panel, when multiple functional film layers are arranged on the small size, the preparation process is complicated and a size effect will occur, which leads to a significant reduction in the efficiency of the display panel, which is not conducive to further improvement of the comprehensive performance of the device.

[0041] In the embodiment of the present application, a display panel is provided, which is a silicon-based full-color display panel. Optionally, the film layer structure provided in the embodiment of the present application can also be applied to a general display panel, which will not be described in detail here. In the embodiment of the present application, a reflective layer and a corresponding light reflective structure are provided to effectively change the propagation of light and improve the light output and display effect of the panel.

[0042] like Figure 2 As shown, Figure 2 The following is a schematic diagram of a film structure of a display panel provided in an embodiment of the present application. When setting up the display panel, the selected substrate is a silicon-based circuit substrate 301, and each light-emitting device is directly prepared on the silicon-based circuit substrate 301 to form a silicon-based display panel and improve its comprehensive performance.

[0043] Specifically, when preparing the silicon-based circuit substrate 301, a plurality of control transistors are also formed in the silicon-based circuit substrate 301, which are not specifically shown in the figure. The plurality of control transistors can provide different control signals to ensure the normal operation of the display panel. When preparing the silicon-based circuit substrate, its preparation process and corresponding structure can be prepared according to the general silicon-based circuit substrate or circuit substrate preparation process.

[0044] Furthermore, the display panel further comprises a plurality of light emitting devices arranged in an array on the silicon-based circuit substrate, each of which is provided with a pixel unit 20. In the embodiment of the present application, when the light emitting device and the corresponding pixel unit 20 are provided, see Figure 2 In each pixel unit, at least one light-emitting layer 40 and a bonding layer 50 correspondingly arranged between the light-emitting layers 40 are also included. In the embodiment of the present application, each light-emitting layer 40 is arranged on the light-emitting path of the light-emitting device. Optionally, the light-emitting layer can be set as an inorganic light-emitting layer, which can be set specifically according to different products.

[0045] In the following embodiments, when a multi-layer light-emitting layer 40 is provided, the light-emitting layer 40 can be provided as a first light-emitting layer, a second light-emitting layer and a third light-emitting layer. For the sake of explanation, in the embodiment of the present application, the first light-emitting layer is a red light-emitting layer 102, the second light-emitting layer is a green light-emitting layer 103, and the third light-emitting layer is a blue light-emitting layer 104. Optionally, light-emitting layers of other numbers and different colors can be provided according to different products. The colors of the above different light-emitting layers can be changed according to the requirements. The control principle and stacking method can be carried out according to the method in the embodiment of the present application, which will not be repeated here.

[0046] Specifically, the red light emitting layer 102 can be directly disposed on the first electrode 302 of the silicon-based circuit substrate 301, so that a control signal is provided to it through the first electrode 302. Furthermore, when different light emitting layers 40 corresponding to each pixel unit are disposed, the area of ​​the organic light emitting layer close to the first electrode 302 can be larger than the area of ​​the organic light emitting layer far from the first electrode 302. In this way, the light emitting layer 40 at the bottom has a larger light emitting area, thereby further improving the full-color effect of the vertical stacking structure and ensuring the comprehensive performance of the display panel.

[0047] In the embodiment of the present application, when the red light-emitting layer 102 is set, a layer of the red light-emitting layer 102 is directly laid on the entire surface of the display panel, so that different pixel units can use the same red light-emitting layer. In this way, the film structure is simplified by setting a whole layer of red light-emitting layer 102 on the silicon-based substrate. Moreover, since different pixel units share the same red light-emitting layer, when some pixel units cannot work normally, their corresponding red light-emitting layers can still provide light for pixel units in other areas, thereby effectively improving the brightness of the red pixels in each pixel unit. When the display panel is displaying dynamic images, the purpose of improving the brightness of white light can be achieved.

[0048] Further, the bonding layer 50 may include a first bonding layer 501, a second bonding layer 502 and a third bonding layer 503. Specifically, the first bonding layer 501 is disposed on the red light-emitting layer 102, and the green light-emitting layer 103 is disposed on the first bonding layer 501, and the second bonding layer 502 is disposed on the green light-emitting layer 103, and the blue light-emitting layer 104 is disposed on the second bonding layer 502, so that light-emitting layers of different colors are stacked on corresponding bonding layers, and a silicon-based display panel with a vertical stacking structure in the embodiment of the present application is formed.

[0049] In the embodiment of the present application, when setting the above-mentioned different light-emitting layers, the area of ​​the red light-emitting layer 102 is larger than the area of ​​the green light-emitting layer 103. At the same time, the area of ​​the green light-emitting layer 103 is larger than the area of ​​the blue light-emitting layer 104, so that the light-emitting layers of different colors are set to different area sizes to effectively improve their full-color display effect.

[0050] Furthermore, a second electrode 602 and a third electrode 603 are correspondingly disposed on both sides of each light-emitting layer. The second electrode 602 and the third electrode 603 are correspondingly disposed on both sides of the light-emitting layer, such as at the edge positions of both sides. Figure 2 The electrode connection structure in the embodiment of the present invention, the second electrode 602 is respectively arranged on the right side of the green light emitting layer 103 and the blue light emitting layer 104, and the third electrode 603 is respectively arranged on the left side of the green light emitting layer 103 and the blue light emitting layer or on the top of the corresponding light emitting layer, and the third electrodes of different colors are electrically connected, see Figure 1 The electrode connection method and structure in the device are used to realize signal transmission.

[0051] In the embodiment of the present application, for each light-emitting layer of different colors, the second electrode 602 and the third electrode 603 are equivalent to the anode and the cathode, so that the second electrode and the third electrode 603 are respectively connected with the blue light-emitting layer 104 and the green light-emitting layer 103, and control the normal operation of the corresponding light-emitting layer. When the above-mentioned different electrodes are set, their settings and arrangement positions can be set according to the specific product, which will not be repeated here.

[0052] See Figure 2 In the structure, the display panel also includes a light reflecting structure 80. In the embodiment of the present application, the light reflecting structure 80 is correspondingly arranged between two adjacent light-emitting layers. In the following embodiments, the light reflecting structure 80 may be arranged only between the red light-emitting layer 102 and the green light-emitting layer 103, or only between the green light-emitting layer and the blue light-emitting layer. Or both of the above are arranged. At this time, the light reflecting structure 80 includes a first light reflecting structure 881 arranged between the red light-emitting layer 102 and the green light-emitting layer 103, and a second light reflecting structure 882 arranged between the green light-emitting layer 103 and the blue light-emitting layer 104. In the following embodiments, when describing its function, only the structure and function effect of the first light reflecting structure 881 are used as an example for description, and the second light reflecting structure can refer to the first light reflecting structure.

[0053] Optionally, the light reflecting structure is disposed in the bonding layer, such as the first light reflecting structure 881 is disposed in the first bonding layer 501. Specifically, when setting, the first bonding layer 501 can be firstly disposed on the red light emitting layer 102, and a groove 88 is disposed on the first bonding layer 501, and the first light reflecting structure 881 is disposed in the groove 88, thereby forming Figure 2 In the embodiment of the present application, the materials of the first bonding layer and the second bonding layer can be set as needed, such as the material of the bonding layer is the same as the material of the interlayer dielectric layer, both of which are set to inorganic SiO 2 And other materials.

[0054] The upper surface of the light reflecting structure 881 is flush with the upper surface of the first bonding layer 501 , so that the light inside it can be directly emitted from the upper surface of the light reflecting structure to ensure the light propagation effect.

[0055] Furthermore, in the embodiment of the present application, when the light reflecting structure 80 is set, it has at least one light guiding surface with the first bonding layer. When light passes through the light guiding surface, total reflection occurs, thereby changing the propagation path of the light and improving the light emission effect.

[0056] In the following embodiments, the light guide surface may include a first light guide surface 851 and a second light guide surface 852. The first light guide surface 851 and the second light guide surface 852 are respectively arranged on opposite sides, such as in the first direction X, the first light guide surface is arranged at the left side of the second light guide surface. In the embodiment of the present application, the light guide surface forms an angle with the plane where the first light emitting layer and the second light emitting layer are located.

[0057] Specifically, in the embodiment of the present application, when the light reflection structure is set, the same end of the first light guide surface 851 and the second light guide surface 852 are connected to form a connection end, and the connection end points to the circuit substrate. At the same time, the other end of the first light guide surface 851 and the second light guide surface 852 is an open end, and the direction of the open end is the same as the light emitting direction of the light emitting device. Figure 2 In the embodiment, the connection end is the part where the light reflective structure 80 intersects with the surface of the red light emitting layer. And the open end of the light reflective structure is the non-intersecting end of the first light guide surface 851 and the second light guide surface 852. Figure 2 The first light guide surface 851 and the second light guide surface 852 are opened upward. The connection end points to the circuit substrate, and the direction of the open end is the same as the light emitting direction of the light emitting device. Thus, the light path is converged.

[0058] Furthermore, in an embodiment of the present application, the display panel also includes a reflective layer. The reflective layer is correspondingly arranged at the edge position of the bonding layer. In the following embodiments, the reflective layer is illustrated by taking the first reflective layer 871 and the second reflective layer 872 as an example. Among them, the two reflective layers are relatively arranged at the edge positions on both sides of the first bonding layer 501, so that when the bottom red light-emitting layer 102 emits light, the light emitted by the red light-emitting layer can be reflected to the light reflection structure to the greatest extent. In an embodiment of the present application, the reflective layer and the light-guiding surface form a convergent light path, so that the light on it is collected and emitted from the light-emitting side, so as to effectively improve the utilization rate of the light and improve the problem of severe edge light loss.

[0059] Specifically, the first reflective layer 871 and the second reflective layer 872 are both arranged at an angle, thereby ensuring that the light emitted by the bottom red light-emitting layer 102 can be reflected by the reflective layers on both sides to the greatest extent, thereby increasing the amount of light entering the light reflective structure 80 and effectively improving the problem of severe light loss at the edge position.

[0060] In the embodiment of the present application, the first reflective layer 871 and the second reflective layer 872 are both inclined toward one side of the light reflective structure 80, see Figure 2 The structure in the figure has an inclination angle which can be set according to the requirements of different products to adjust the light, which will not be described in detail here.

[0061] Furthermore, when the reflective layer is provided, its material can be organic, inorganic or metal reflective material. For example, the materials of the above two reflective layers are both Ag, TiO 2 / SiO 2 When the light passes through the reflective layer, total reflection occurs and changes the path of the light, which will not be described here. At the same time, when the reflective layer is set, its refractive index can be greater than the bonding layer and less than the refractive index of the light reflection structure. For example, the refractive index of the reflective layer is set to 1.8-1.86. Therefore, the total reflection effect of light on the reflective layer can be achieved by adjusting the relationship between the refractive indexes of the reflective layer and the bonding layer.

[0062] In the embodiment of the present application, the refractive index of the light reflecting structure 80 is greater than the refractive index of the bonding layer. Specifically, the refractive index of the light reflecting structure 80 can be set to 2.01-3.02, and the corresponding refractive index of the bonding layer is set to 1.02-1.73. Optionally, the refractive index n of the light reflecting structure is set to 2.3 or 2.6, and the corresponding refractive index n1 of the bonding layer is set to 1.25 or 1.46. In the embodiment of the present application, in order to ensure the interaction effect of the two film layers with different refractive indices on the light, the refractive index of the light reflecting structure can be at least 0.4 greater than the refractive index of the bonding layer to improve the effect of the film layer on the light. And ensure that more large-angle light is totally reflected at the above-mentioned interface position.

[0063] like Figure 3-Figure 4 As shown, Figure 3 This is a schematic diagram of the effect of a partial film layer structure of the display panel provided in an embodiment of the present application on the effect of light, Figure 4 It is a schematic diagram of the light effect of another film layer of the display panel provided in an embodiment of the present application.

[0064] Combination Figure 2 In the panel structure, in the embodiment of the present application, when the first reflective layer 871 and the second reflective layer 872 are set, the first reflective layer 871 and the second reflective layer 872 are both set obliquely. In order to ensure the consistency of the light effect in different areas, when setting, the first reflective layer 871 and the second reflective layer 872 can be symmetrically arranged relative to the central axis of the red light-emitting layer 102, so that the light of the two layers has the same effect.

[0065] At the same time, when setting the first reflective layer 871 and the second reflective layer 872, the two reflective layers are tilted and have an angle with the plane formed by the upper surface of the substrate. In the embodiment of the present application, the angle is selected as an acute angle, wherein the angle is set to 75°-86°. Optionally, the acute angle is set to 78° or 83°. When the red light-emitting layer 102 at the bottom emits light, within the above-mentioned angle range, the light propagates to the first reflective layer and the second reflective layer, and is totally reflected on the corresponding reflective layers and then enters the bonding layer and the light reflection structure. In the embodiment of the present application, the light at the edge position can be reflected into the light reflection structure to the greatest extent, thereby changing the propagation path of the light in the film layer to effectively reduce the loss of large-angle light at the edge of the panel and improve the display effect of the panel.

[0066] In the embodiment of the present application, the propagation and action of light C, light D and light F are taken as examples for explanation: the above light rays are all emitted from the red light-emitting layer 102. After the light C is emitted, it will pass through the second reflective layer 872, reflect on the second reflective layer 872, and enter the first bonding layer 501 again, and then enter the light reflection structure 80 from the second light guide surface 852, propagate to the first light guide surface 851 in the light reflection structure 80, and undergo total reflection on the first light guide surface 851, and finally be emitted from the light output side.

[0067] For light D, after being emitted by the red light-emitting layer 102, it will pass through the first bonding layer 501. Since the refractive index of the first bonding layer is smaller than the refractive index of the light reflecting structure, the light D will directly enter the light reflecting structure 80. When the light D propagates in the light reflecting structure 80, it will be acted upon and reflected again by the first light guiding surface 851 or the second light guiding surface 852 by total reflection. After multiple actions, it will finally be emitted from the light emitting side.

[0068] For the light F, after being emitted from the red light-emitting layer 102, it will first propagate in the first bonding layer 501. If it propagates to the first reflective layer 871, it will be totally reflected by the first reflective layer 871, and then enter the first bonding layer 501 again, and then enter the light reflection structure from the first light guide surface again. At this time, the light will not be totally reflected on the first light guide surface 851, and then it will propagate to the second light guide surface. At this time, since the refractive index of the light reflection structure 80 is greater than the refractive index of the first bonding layer 501, the light F will be totally reflected on the second light guide surface 852, thereby changing the propagation path of the light. After being acted on by the first light guide surface 851 and the second light guide surface 852 for many times, the light is finally emitted from the light output side.

[0069] In the embodiment of the present application, the above-mentioned reflective layer and the corresponding light reflection structure are used to change the optical path of large-angle light at the edge of the panel, thereby reducing the loss of large-angle light at the edge and improving the light output efficiency and display effect of the panel.

[0070] For further details, see Figure 3 In the embodiment, when the light reflecting structure 80 and the corresponding reflecting layer are arranged, the light reflecting structure 80 forms an inverted prism structure in the first bonding layer 501. The edge faces of the inverted prism structure correspond to the side walls of the groove and the different light guiding surfaces, which will not be described in detail here.

[0071] In order to ensure the effect of the inverted prism structure on the light, the edge formed by the first light guide surface 851 and the second light guide surface 852 corresponding to the inverted prism structure is located in the middle of the red light emitting layer 102, such as dividing the red light emitting layer 102 into two regions of equal area. At the same time, the first light guide surface 851 and the second light guide surface 852 have the same inclination angle on the plane where the substrate is located. At this time, the inverted prism structure is an isosceles prism. This ensures that the same effect is achieved on the light at different edge positions on both sides of the panel.

[0072] In the embodiment of the present application, when setting the above-mentioned first bonding layer, since the light totally reflected on the first light guiding surface and the second light guiding surface will first pass through the first bonding layer, a plurality of scattering particles can also be set in the first bonding layer 501, and the scattering particles can be evenly set on both sides of the inverted prism. By setting the scattering particles, the light with a large angle can be further gathered, thereby further increasing the light entering the prism structure, improving the emission effect of the light with a large angle, and improving the overall performance of the device.

[0073] See Figure 4 In combination Figure 3 In the schematic diagram of light propagation, for light H, after light H is emitted from the red light-emitting layer 102, the angle of light H is smaller than the angles of light C and light F. At this time, light H can directly propagate into the first bonding layer 501, and propagate from the first bonding layer 501 to the light reflection structure 80, and no longer propagates to the reflection layers on both sides, thereby ensuring the light emission amount in the middle area of ​​the display panel.

[0074] as well as Figure 5 As shown, Figure 5 This is a schematic diagram of the effect of another panel on light provided in an embodiment of the present application. Figure 3-Figure 4 In the embodiment of the present application, the light output angle of the light output side is changed by adjusting the value of the angle formed by the first light guide surface 851 and the second light guide surface 852. Figure 3In the embodiment, the light is emitted from the first area 19, and by adjusting the angle α of the light guide surface, the light is emitted from the second area 22. In the embodiment of the present application, the angle between the light guide surfaces of the light reflection structure and the inclination angle of the corresponding reflection layer can be further adjusted to effectively shape the large-angle light in the panel, effectively reduce the loss of the large-angle light at the edge position, and improve the light emission effect and display performance.

[0075] See Figure 5 In the embodiment of the present application, when the above-mentioned light reflection structure 80 is set, taking the light C as an example, the light C will be reflected by the second reflection layer 872, and then enter the first light guide surface 851, and will be totally reflected on the first light guide surface 851. Similarly, other light rays acted upon by the first light guide surface 851 and the second light guide surface 852 enter the light reflection structure 80, and will be totally reflected on the corresponding light guide surface in the same manner as the above-mentioned light C, which will not be described in detail here.

[0076] At this time, it enters the light reflection structure 80 and acts on the first light guide surface 851. A normal is made along the incident point on the first light guide surface 851, and the critical angle value β formed by the reflected light and the incident light is obtained. The critical angle value β is the total reflection angle of the light on the first light guide surface. In the embodiment of the present application, the total reflection angle corresponding to the light on the light guide surface is set to 34° to 50°. Optionally, the total reflection angle is set to 38° or 45°, so as to ensure the total reflection effect of the light on the first light guide surface 851 and the second light guide surface 852, thereby improving the light output efficiency of the panel and the brightness of the white light.

[0077] In the embodiment of the present application, the above description is only based on the first light reflection structure as an example. When the first light reflection structure and the second light reflection structure are simultaneously provided in the display panel, the first light reflection structure is provided near the bottom, and the volume of the first light reflection structure is larger than the volume of the second light reflection structure. At the same time, the centers of the first light reflection structure and the second light reflection structure are located on the same vertical axis. This ensures that the light in different areas has the same effect. It also ensures that the second light reflection structure has an effect on the light emitted from the bottom, and shapes the large-angle light beam, thereby avoiding the problem of large-angle light loss at the edge.

[0078] Furthermore, in an embodiment of the present application, the display panel further includes a lens layer 901, a third bonding layer 503, and an insulating layer 504, wherein the third bonding layer 503 is arranged corresponding to the blue light-emitting layer 104, and the insulating layer 504 is arranged on the blue light-emitting layer 104 and covers the blue light-emitting layer 104. At the same time, the lens layer 901 is arranged correspondingly on the third bonding layer of each pixel unit. In an embodiment of the present application, the lens layer 901 is arranged as an arc surface or other convex surface structure, and when light passes through the lens layer 901, its light output angle and the corresponding light output amount are effectively increased, thereby improving the light emission and display effect of the device.

[0079] Further, such as Figure 6-Figure 8 As shown, Figure 6-Figure 8 The following is a partial film layer structure diagram corresponding to the display panel preparation process provided in the embodiment of the present application. The preparation process in the embodiment of the present application only takes a partial film layer as an example. During the preparation, a circuit substrate is sequentially prepared and a red light-emitting layer 102 corresponding to the first light-emitting layer is prepared on the circuit substrate.

[0080] See Figure 7 As shown, after the red light emitting layer 102 is prepared, a first bonding layer 501 is prepared on the red light emitting layer 102, and a groove 88 is etched on the first bonding layer 501. In the embodiment of the present application, the two opposite side walls of the groove 88 correspond to the first light guiding surface and the second light guiding surface in the embodiment of the present application.

[0081] See Figure 8 After the groove 88 is etched, a light reflecting structure 80 is arranged in the groove 88. In the embodiment of the present application, when the light reflecting structure 80 is arranged, the upper surface of the light reflecting structure 80 is flush with the upper surface of the first bonding layer 501, and the side wall of the light reflecting structure 80 is completely in contact with the inner side wall of the groove. At the same time, the refractive index of the light reflecting structure 80 is greater than the refractive index of the first bonding layer 501.

[0082] After the above-mentioned light reflecting structure 80 is prepared, the second light-emitting layer, the second bonding layer, the third light-emitting layer and the third bonding layer and other film layer structures are sequentially prepared on the light reflecting structure, and finally a complete film layer structure of the display panel in the embodiment of the present application is formed.

[0083] Furthermore, a semiconductor device or a light-emitting display device is provided in an embodiment of the present application. When the semiconductor device is prepared, the semiconductor device includes the display panel in the embodiment of the present application, and the display panel is arranged according to the film layer structure in the embodiment of the present application, and the propagation path of the light is changed by arranging the above-mentioned light reflection structure and the corresponding reflection layer, so as to effectively improve the light-emitting display effect and comprehensive performance of the semiconductor device.

[0084] In the embodiment of the present application, the display panel and the semiconductor device may be any product or component with display function or touch function, such as a mobile phone, a computer, an electronic paper, a display, etc., and the specific type is not specifically limited.

[0085] In summary, the above is a detailed introduction to a display panel provided by an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present invention. Although the present invention is disclosed as above in the form of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is based on the scope defined by the claims.

Claims

1. A display panel, characterized in that: include: The light emitting device is arrayed on a circuit substrate, and the light emitting device at least comprises: A first light-emitting layer is disposed on the circuit substrate; A first bonding layer is disposed on the first light-emitting layer; a second light-emitting layer, disposed on the first bonding layer and electrically connected to the first light-emitting layer; and a light reflecting structure, wherein the light reflecting structure is disposed in the first bonding layer and between the first light emitting layer and the second light emitting layer; Wherein, the light reflective structure has at least one light guiding surface, and the light guiding surface forms an angle with the plane where the first light emitting layer and the second light emitting layer are located; The display panel further includes a reflective layer disposed near an edge of the first bonding layer, and the reflective layer and the light guiding surface form a convergent light path.

2. The display panel according to claim 1, characterized in that: The light reflecting structure includes a first light guiding surface and a second light guiding surface, wherein the same end of the first light guiding surface and the second light guiding surface are connected to form a connecting end, and the connecting end points to the circuit substrate, and the other end opposite to the first light guiding surface and the second light guiding surface is an open end, and the direction of the open end is the same as the light emitting direction of the light emitting device.

3. The display panel according to claim 2, characterized in that: The connection end formed by the intersection of the first light guiding surface and the second light guiding surface is located in the middle of the first light emitting layer, and the inclination angle formed by the first light guiding surface and the plane where the circuit substrate is located is the same as the inclination angle formed by the second light guiding surface and the plane where the substrate is located.

4. The display panel according to claim 1, characterized in that: The display panel further includes a second bonding layer disposed on the second light-emitting layer, and a third light-emitting layer disposed on the second bonding layer; the reflective layer includes a first reflective layer disposed on one side of the first bonding layer, and a second reflective layer disposed on the opposite side of the first bonding layer; Among them, the light reflecting structure is at least arranged in the first bonding layer or the second bonding layer, the second light guiding surface of the light guiding surface is close to one side of the second reflecting layer, the first light guiding surface of the light guiding surface is close to the first reflecting layer, and the light reflected by the first reflecting layer is totally reflected at the second light guiding surface, and the light reflected by the second reflecting layer is totally reflected at the first light guiding surface.

5. The display panel according to claim 4, characterized in that: The first bonding layer further comprises a groove, and the light reflecting structure is arranged in the groove and flush with the surface of the first bonding layer to form an inverted prism structure.

6. The display panel according to claim 4, characterized in that: The acute angle formed between the first reflective layer and the second reflective layer relative to the plane where the circuit substrate is located is 75°-86°.

7. The display panel according to claim 1, characterized in that: The refractive index of the light reflecting structure is greater than the refractive index of the first bonding layer.

8. The display panel according to claim 2, characterized in that: The refractive index of the light reflecting structure is 2.01-3.02, and the refractive index of the bonding layer is 1.02-1.

73.

9. The display panel according to any one of claims 1 to 8, characterized in that: The light reflecting structure includes a first light reflecting structure disposed in the first bonding layer, and a second light reflecting structure disposed in the second bonding layer; The centers of the first light reflecting structure and the second light reflecting structure are located on the same axis, and the volume of the first light reflecting structure is greater than the volume of the second light reflecting structure.

10. The display panel according to claim 1, characterized in that: The light emitted by the first light-emitting layer is reflected by the reflective layer to the light-guiding surface, and the total reflection angle of the light on the light-guiding surface is set to 34° to 50°.

Images