Display panel

Abstract

An embodiment of the present application provides a display panel comprising a light-emitting device, the light-emitting device comprising a plurality of stacked light-emitting layers, a bonding layer disposed between adjacent light-emitting layers, and a light-reflecting structure disposed within the bonding layer. The light-reflecting structure and the bonding layer have at least one light-guiding surface, and a reflective layer is disposed at an edge of the bonding layer. Light emitted by the light-emitting layer is reflected by the reflective layer onto the light-guiding surface, where it is totally reflected and emitted. In the embodiment of the present application, by disposing the reflective layer and the light-reflecting structure within the film layer of the display panel, the problem of severe high-angle light loss at the inner edge of the display panel is reduced, thereby improving the brightness of white light and the display effect of the panel.

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 all-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] To further improve the luminous performance of display panels, silicon-based (Si) circuit substrates are currently used as substrates, and Si-uLED (silicon-ultraluminescent LED) light-emitting devices are further formed thereon. Compared to traditional light-emitting devices, Si-uLEDs have attracted attention due to their smaller size and higher brightness. However, in the prior art, when preparing these light-emitting devices, due to the small size of Si-uLEDs, when these smaller Si-uLEDs are vertically stacked to form a device structure with improved full-color display performance, a size effect occurs. Specifically, as pixel size decreases, the pixel side area and aperture area increase, resulting in a significant decrease in the luminous efficiency of the light-emitting device. For example, when preparing a vertically stacked full-color panel, the bottom layer's luminous and display area is insufficient. The vertical stacking structure design further increases the gap between adjacent devices, and light at the side edges cannot be utilized. In particular, light at large angles is severely lost, resulting in suboptimal Si-uLED luminescence and display effects, hindering further improvement in the overall performance of the display panel.

[0004] To sum up, in the prior art, when preparing and forming silicon-based display panel light-emitting devices, 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 improvement of the comprehensive performance of the device. Summary of the Invention

[0005] An embodiment of the present invention provides a display panel to effectively improve the problem of large light loss at the side edge positions inside the existing display panel, resulting in unsatisfactory light emission and display effects from the device.

[0006] To solve the above technical problems, a first aspect of an embodiment of the present invention provides a display panel, comprising: light-emitting devices arranged in an array on a circuit substrate, the light-emitting devices comprising at least:

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

[0008] a first bonding layer, 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, the light reflecting structure being disposed in the first bonding layer and located between the first light emitting layer and the second light emitting layer;

[0011] 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 one 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] In which, 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, is arranged flush with the surface of the first bonding layer, and forms 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 reflective 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 that 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, wherein the light-emitting device includes a plurality of light-emitting layers stacked on a light-emitting path, a bonding layer provided between two adjacent light-emitting layers, and a light-reflecting structure, wherein the light-reflecting structure is correspondingly provided in the bonding layer, wherein a light-guiding surface is provided between the light-reflecting structure and the bonding layer, a reflective layer is provided 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 providing 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 the 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any 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 structure of a display panel provided in an embodiment of the present application;

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

[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 This is a schematic diagram of the effect of another panel provided in an embodiment of the present application on light;

[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 this 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, 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 such as "comprising" or "containing" will be understood to imply the inclusion of the elements discussed 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 the 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” used herein specify the presence of stated features or components, but do not preclude 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 can 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 structure diagram 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 base 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. By stacking the above-mentioned organic red light-emitting layer 102, green light-emitting layer 103 and blue light-emitting layer 104 in sequence, a vertical stacking structure is formed to improve its display effect. However, due to the small size of the display panel, when multiple functional film layers are arranged on this small size, its preparation process is complicated and a size effect will occur, which will lead to a significant reduction in the efficiency of the display panel, which is not conducive to further improvement of the overall performance of the device.

[0041] In one embodiment of the present application, a display panel is provided. This display panel is a silicon-based full-color display panel. Optionally, the film structure provided in this embodiment can also be applied to general display panels, which will not be described in detail here. In this 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 This is a schematic diagram of the film structure of a display panel provided in an embodiment of the present application. When configuring this display panel, the selected substrate is a silicon-based circuit substrate 301. By directly fabricating various light-emitting devices on the silicon-based circuit substrate 301, a silicon-based display panel is formed, thereby improving its overall performance.

[0043] Specifically, when preparing the silicon-based circuit substrate 301, multiple control transistors are also formed in the silicon-based circuit substrate 301, which are not specifically drawn in the figure. Multiple 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 light emitting device being 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 Each pixel unit further includes at least one light-emitting layer 40 and a bonding layer 50 disposed between the light-emitting layers 40. In the embodiment of the present application, each light-emitting layer 40 is disposed on the light-emitting path of the light-emitting device. Optionally, the light-emitting layer can be configured as an inorganic light-emitting layer, which can be specifically configured according to different products.

[0045] In the following embodiments, when multiple light-emitting layers 40 are provided, the light-emitting layers 40 may be provided as a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer. For ease of illustration, in the embodiments 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, other numbers of light-emitting layers of different colors may be provided depending on different products. The colors of the above-mentioned different light-emitting layers may be changed as needed. The control principles and stacking methods thereof may be implemented in accordance with the methods in the embodiments of the present application and will not be further described 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, thereby providing control signals thereto via the first electrode 302. Furthermore, when providing different light-emitting layers 40 corresponding to each pixel unit, the area of ​​the organic light-emitting layer closer to the first electrode 302 can be larger than the area of ​​the organic light-emitting layer farther from the first electrode 302. This allows the bottom light-emitting layer 40 to have a larger light-emitting area, further enhancing the full-color effect of the vertically stacked structure and ensuring the overall performance of the display panel.

[0047] In the embodiment of the present application, when the red light-emitting layer 102 is provided, 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, by providing a whole layer of red light-emitting layer 102 on the silicon-based substrate, the film structure is simplified. 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] Furthermore, 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, while the green light-emitting layer 103 is disposed on the first bonding layer 501, 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, thereby stacking light-emitting layers of different colors on corresponding bonding layers to form a vertically stacked silicon-based display panel in the embodiment of the present application.

[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, thereby setting the light-emitting layers of different colors to different area sizes to effectively improve its full-color display effect.

[0050] Furthermore, a second electrode 602 and a third electrode 603 are correspondingly provided on both sides of each light emitting layer. The second electrode 602 and the third electrode 603 are correspondingly provided 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 is as follows: 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 above the corresponding light-emitting layer, and the third electrodes of different colors are electrically connected. 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, the second electrode 602 and the third electrode 603 serve as the anode and cathode for each light-emitting layer of a different color. Thus, the second electrode 602 and the third electrode 603 respectively establish electrical conduction with the blue light-emitting layer 104 and the green light-emitting layer 103, thereby controlling the normal operation of the corresponding light-emitting layer. The arrangement and placement of these different electrodes can be customized based on the specific product and will not be further detailed 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 can 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 situations are arranged. In this case, 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 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 provided in the bonding layer, such as the first light reflecting structure 881 is provided in the first bonding layer 501. Specifically, when providing, the first bonding layer 501 can be provided on the red light emitting layer 102, and a groove 88 is provided on the first bonding layer 501, and the first light reflecting structure 881 is provided 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 and the material of the interlayer dielectric layer, both of which are set to inorganic SiO2 or 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 and the first bonding layer have at least one light guiding surface. 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-guiding surface may include a first light-guiding surface 851 and a second light-guiding surface 852. The first light-guiding surface 851 and the second light-guiding surface 852 are disposed on opposite sides. For example, in the first direction X, the first light-guiding surface is disposed to the left of the second light-guiding surface. In the embodiments of the present application, the light-guiding surface forms an angle with the planes where the first and second light-emitting layers 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 portion where the light reflective structure 80 intersects with the surface of the red light emitting layer. 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 open end is oriented in the same direction as the light emitting direction of the light emitting device, thereby converging the light path.

[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 the 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 to the maximum extent by the reflective layers on both sides, 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 that can be set according to the needs of different products to adjust the light, which will not be described here.

[0061] Furthermore, when providing the reflective layer, its material can be organic, inorganic, or metallic reflective material. For example, the materials of both reflective layers are set to Ag or TiO2 / SiO2. When light passes through the reflective layer, it undergoes total internal reflection, changing the light's path. This is not further described here. Furthermore, when providing the reflective layer, its refractive index can be greater than that of the bonding layer and less than that of the light-reflecting structure. For example, the refractive index of the reflective layer can be set to 1.8-1.86. Thus, by adjusting the refractive index relationship between the reflective layer and the bonding layer, the total internal reflection effect of light on the reflective layer can be achieved.

[0062] In an 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 an embodiment of the present application, in order to ensure the interaction effect of the two film layers with different refractive indices on light, the refractive index of the light reflecting structure can be made at least 0.4 greater than the refractive index of the bonding layer to improve the effect of the film layer on light. And ensure that more light with a large angle 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 light on the partial film layer structure of the display panel provided in the embodiment of the present application. Figure 4 Schematic diagram of the light effect of another film layer of the display panel provided in an embodiment of the present application.

[0064] Combine 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 provided, the first reflective layer 871 and the second reflective layer 872 are both provided at an angle. To ensure consistency in the light effects in different areas, the first reflective layer 871 and the second reflective layer 872 can be provided symmetrically with respect to the central axis of the red light-emitting layer 102. In this way, the light from 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, both 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 layer 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 light at a large angle 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 an example to illustrate: 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, be reflected on the second reflective layer 872, and enter the first bonding layer 501 again, and then enter the light reflective structure 80 from the second light guide surface 852. It propagates in the light reflective structure 80 to the first light guide surface 851, and is totally reflected on the first light guide surface 851, and is finally emitted from the light output side.

[0067] For light D, after being emitted from 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 light F, after being emitted from the red light-emitting layer 102, it will first propagate within 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. Then, it will enter the light reflective 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 will then propagate to the second light guide surface. At this time, since the refractive index of the light reflective 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 upon by the first light guide surface 851 and the second light guide surface 852 multiple 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 provided, 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] To ensure the inverted prism structure's effective light-reflecting effect, the edge formed by the first and second light-guiding surfaces 851, 852 corresponding to the inverted prism structure is located in the center of the red light-emitting layer 102, essentially dividing the red light-emitting layer 102 into two equal regions. Furthermore, the first and second light-guiding surfaces 851, 852 have the same inclination angle relative to the substrate plane. In this case, the inverted prism structure is an isosceles prism. This ensures the same light-reflecting effect at different edges on both sides of the panel.

[0072] In an 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 converged, 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 light propagation diagram, 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 then propagate from the first bonding layer 501 to the light reflection structure 80, without propagating to the reflective layers on both sides, thereby ensuring the light output in the central 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 angle formed by the first light guide surface 851 and the second light guide surface 852 is adjusted to change the light output angle of the light output side. Figure 3In the embodiment, light is emitted from the first region 19, and by adjusting the angle α of the light-guiding surface, light is emitted from the second region 22. In the embodiment of the present application, the angle between the light-guiding surfaces of the light-reflecting structure and the inclination angle of the corresponding reflective layer can be further adjusted to effectively shape the high-angle light within the panel, effectively reduce the loss of high-angle light at the edge, and improve the light extraction effect and display performance.

[0075] See Figure 5 In the embodiment of the present application, when the light reflective structure 80 is provided, taking light C as an example, light C will be reflected by the second reflective layer 872, then enter the first light guiding surface 851, and undergo total reflection on the first light guiding surface 851. Similarly, other light rays acted upon by the first light guiding surface 851 and the second light guiding surface 852 enter the light reflective structure 80 and undergo total reflection on the corresponding light guiding surfaces in the same manner as light C, and will not be further described 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 embodiments of the present application, the above description uses only the first light reflective structure as an example. When both the first and second light reflective structures are provided within the display panel, the first light reflective structure is positioned near the bottom, and its volume is greater than that of the second light reflective structure. Furthermore, the centers of the first and second light reflective structures are located on the same vertical axis. This ensures that light rays in different regions have the same effect. Furthermore, the second light reflective structure ensures that the light rays emitted from the bottom have the same effect, shaping the wide-angle light beams and thus avoiding the problem of wide-angle light loss at the edges.

[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. 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 correspondingly arranged on the third bonding layer of each pixel unit. In an embodiment of the present application, the lens layer 901 is arranged as a curved surface or other convex surface structure. 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 This is a diagram of a portion of the film layer structure corresponding to the display panel manufacturing process provided in the embodiments of this application. The manufacturing process in the embodiments of this application only uses a portion of the film layer as an example. During the manufacturing process, a circuit substrate is sequentially prepared and a red light-emitting layer 102 corresponding to the first light-emitting layer is formed 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 reflective structure 80 is disposed within the groove 88. In the embodiment of the present application, when the light reflective structure 80 is disposed, the upper surface of the light reflective structure 80 is flush with the upper surface of the first bonding layer 501, and the sidewalls of the light reflective structure 80 are completely aligned with the inner sidewalls of the groove. Furthermore, the refractive index of the light reflective 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 the complete film layer structure of the display panel in the embodiment of the present application is formed.

[0083] Furthermore, embodiments of the present application also provide a semiconductor device or light-emitting display apparatus. When preparing and forming the semiconductor device, the semiconductor device includes the display panel of the embodiments of the present application, and the display panel is configured according to the film layer structure of the embodiments of the present application. By providing the aforementioned light-reflecting structure and corresponding reflective layer, the propagation path of light is changed, thereby effectively improving the light-emitting display effect and overall performance of the semiconductor device.

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

[0085] To sum up, 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 ideas of the present invention. Although the present invention is disclosed as above in preferred embodiments, the above preferred embodiments are not used 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 devices are arrayed on a circuit substrate, and the light-emitting devices include at least: A first light-emitting layer is provided on the circuit substrate; a first bonding layer, 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, the light reflecting structure being disposed in the first bonding layer and located between the first light emitting layer and the second light emitting layer; 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, wherein: 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.

3. The display panel according to claim 2, wherein: 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, wherein: 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; In which, 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, wherein: The first bonding layer further includes 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, wherein: 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°.

7. The display panel according to claim 1, wherein: 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, wherein: 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 4 to 6, 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 that of the second light reflecting structure.

10. The display panel according to claim 1, wherein 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 corresponding to the light on the light-guiding surface is set to 34° to 50°.

Images