Display panel, display device and method for manufacturing display panel
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGSHA HKC OPTOELECTRONICS CO LTD
- Filing Date
- 2022-07-22
- Publication Date
- 2026-06-19
Smart Images
Figure CN115274796B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to a display panel, a display device, and a method for manufacturing the display panel. Background Technology
[0002] OLED (Organic Light Emitting Display) is considered the next generation of mainstream flat panel display technology due to its excellent characteristics such as self-illumination, no need for backlight, high contrast, thinness, wide viewing angle, fast response speed, applicability to flexible panels, wide operating temperature range, and simpler structure and manufacturing process. It is one of the most watched technologies in the current flat panel display field.
[0003] In existing methods for achieving full-color OLED display panels, the filter method requires the use of white organic light-emitting diodes as a backlight, with filters added on top to display red, green, and blue light. However, due to the significant decrease in brightness of blue pixels, the luminous efficiency and lifespan of the display device are reduced, resulting in insufficient product performance. Summary of the Invention
[0004] The purpose of this application is to provide a display panel, a display device, and a method for manufacturing a display panel, so as to alleviate the decay of blue pixel brightness, increase the luminous efficiency of the display device, and extend the lifespan of the OLED display panel.
[0005] This application discloses a display panel, which includes a substrate; an anode arranged in a matrix on the substrate; a pixel definition layer disposed on the substrate, including an open area and a non-open area, the non-open area being disposed between two adjacent anodes; a light-emitting layer disposed within the open area; a cathode covering the light-emitting layer and the pixel definition layer; and a filter layer disposed on the side of the cathode away from the substrate. The light-emitting layer includes a first light-emitting area and a second light-emitting area, the first light-emitting area being disposed corresponding to the red and green color resists in the filter layer, the second light-emitting area being disposed corresponding to the blue color resist in the filter layer, and the second light-emitting area including a blue light-emitting layer made of a blue light-emitting material.
[0006] Optionally, the first light-emitting region includes a white light-emitting layer made of white light-emitting material, the white light-emitting layer being disposed corresponding to the red color resist and the green color resist respectively, and the second light-emitting region further includes a main light-emitting layer made of white light-emitting material, the main light-emitting layer being disposed between the anode and the blue light-emitting layer.
[0007] Optionally, the second light-emitting region further includes an auxiliary light-emitting layer disposed between the anode and the main light-emitting layer, the auxiliary light-emitting layer being made of a blue light-emitting material.
[0008] Optionally, the thickness of the red color resist and the thickness of the green color resist are both greater than or equal to the sum of the thicknesses of the blue color resist, the auxiliary light-emitting layer, and the blue light-emitting layer.
[0009] Optionally, the second light-emitting region includes a main light-emitting layer made of white light-emitting material, which is disposed between the blue light-emitting layer and the cathode.
[0010] Optionally, the main light-emitting layer is disposed in the same layer as the white light-emitting layer in the first light-emitting area.
[0011] Optionally, the sum of the thickness of the red color resist and the thickness of the white light-emitting layer is greater than or equal to the sum of the thicknesses of the blue color resist, the main light-emitting layer, the auxiliary light-emitting layer, and the blue light-emitting layer; the sum of the thickness of the green color resist and the thickness of the white light-emitting layer is greater than or equal to the sum of the thicknesses of the blue color resist, the main light-emitting layer, the auxiliary light-emitting layer, and the blue light-emitting layer; wherein, the thickness of the white light-emitting layer is equal to the thickness of the main light-emitting layer.
[0012] Optionally, the first light-emitting area further includes a red light-emitting layer and a green light-emitting layer, wherein the red light-emitting layer is made of a red light-emitting material and the green light-emitting layer is made of a green light-emitting material; the red light-emitting layer corresponds to the red color resist in the filter layer and is disposed between the white light-emitting layer and the cathode, and the green light-emitting layer corresponds to the green color resist in the filter layer and is disposed between the white light-emitting layer and the cathode.
[0013] This application also discloses a display device, which includes a circuit board and the display panel described above, wherein the circuit board is electrically connected to the display panel.
[0014] This application also discloses a method for fabricating a display panel, comprising the steps of: fabricating a plurality of anodes arranged in an array on a substrate; depositing a light-shielding material on the anodes; forming a pixel definition layer disposed on the substrate through a mask, wherein the pixel definition layer located between two adjacent anodes is a non-aperture region, and an aperture region is formed between two adjacent non-aperture regions of the pixel definition layer; forming a light-emitting layer composed of a first light-emitting region and a second light-emitting region arranged side by side within the aperture region, wherein the first light-emitting region includes a white light-emitting layer made of a white light-emitting material, and the second light-emitting region includes a blue light-emitting layer made of a blue light-emitting material; forming a cathode on the light-emitting layer; and forming a light-filtering layer on the cathode, wherein a blue color resist in the light-filtering layer is disposed on the blue light-emitting layer in the second light-emitting region, and a green color resist and a red color resist in the light-filtering layer are disposed on the white light-emitting layer in the first light-emitting region.
[0015] Compared to the approach where the light-emitting layers corresponding to the red, green, and blue color resists are all made of white light-emitting layers, this application uses blue light-emitting material to make the second light-emitting area corresponding to the blue color resist, while the first light-emitting areas corresponding to the red and green color resists are made of white light-emitting material. When the display panel is in operation, the light emitted by the second light-emitting area corresponding to the blue color resist is blue light, which can alleviate the problem of blue brightness decay of the display panel, thereby increasing the luminous efficiency of the display device and extending the life of the display panel. Attached Figure Description
[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:
[0017] Figure 1 This is a schematic diagram of a display device according to this application;
[0018] Figure 2 A schematic diagram of a display panel according to a first embodiment of this application is disclosed;
[0019] Figure 3 A schematic diagram of a display panel according to a second embodiment of this application is disclosed;
[0020] Figure 4 A schematic diagram of a display panel according to a third embodiment of this application is disclosed;
[0021] Figure 5 A schematic diagram of a display panel according to a fourth embodiment of this application is disclosed;
[0022] Figure 6 A schematic diagram of a display panel according to a fifth embodiment of this application is disclosed;
[0023] Figure 7 A flowchart of the first method for manufacturing a display panel according to this application is disclosed;
[0024] Figure 8 The manufacturing process of the first type of display panel of this application is disclosed;
[0025] Figure 9 The manufacturing process of the second type of display panel of this application is disclosed;
[0026] Figure 10 The fabrication process of the third type of display panel of this application is disclosed.
[0027] Among them, 10 is a display device; 20 is a circuit board; 100 is a display panel; 200 is a substrate; 300 is an anode; 400 is a pixel definition layer; 500 is a light-emitting layer; 510 is a first light-emitting area; 511 is a white light-emitting layer; 512 is a red light-emitting layer; 513 is a green light-emitting layer; 520 is a second light-emitting area; 521 is a blue light-emitting layer; 522 is a main light-emitting layer; 523 is an auxiliary light-emitting layer; 600 is a cathode; 700 is a filter layer; 710 is a red color resist; 720 is a green color resist; 730 is a blue color resist; and 800 is an encapsulation layer. Detailed Implementation
[0028] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.
[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.
[0030] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0031] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0032] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.
[0033] Figure 1 This is a schematic diagram of a display device disclosed in this application, such as... Figure 1 As shown, this application discloses a display device 10, which includes a circuit board 20 and a display panel 100. The circuit board 20 is electrically connected to the display panel 100, and the connection is generally made through a flexible circuit board 20.
[0034] This application also discloses a display panel that can be used in the display device described above. For the display panel, this application provides the following design:
[0035] Figure 2 A schematic diagram of a display panel according to a first embodiment of this application is disclosed, as follows: Figure 2 As shown, a display panel 100 is disclosed, which is an OLED display panel 100. The display panel 100 includes a substrate 200, an anode 300, a pixel definition layer 400, a light-emitting layer 500, a cathode 600, a light filter layer 700, and an encapsulation layer 800.
[0036] The anodes 300 are arranged in a matrix on the substrate 200; the pixel definition layer 400 is disposed on the substrate 200, including an open area and a non-open area, with the non-open area located between two adjacent anodes 300, and the pixel definition layer 400 forming an open area between two adjacent non-open areas; the light-emitting layer 500 is disposed within the open area; the cathode 600 covers the light-emitting layer 500 and the pixel definition layer 400; the light filter layer 700 is disposed on the side of the cathode 600 away from the substrate 200; and the encapsulation layer 800 covers the light filter layer 700.
[0037] The filter layer 700 includes three color resists: red, green, and blue (RGB). It may also include yellow and white color resists. The color resists of different colors are separated by the pixel definition layer 400. This is not limited here. Taking the common filter layer 700 that includes red, green, and blue color resists as an example.
[0038] The light-emitting layer 500 includes a first light-emitting area 510 and a second light-emitting area 520. The first light-emitting area 510 corresponds to the red color resist 710 and the green color resist 720 in the filter layer 700. The first light-emitting area 510 includes a white light-emitting layer 511 made of white light-emitting material. The light emitted by the white light-emitting material is white light, and the white light-emitting layer 511 is respectively disposed corresponding to the red color resist 710 and the green color resist 720. The second light-emitting area 520 corresponds to the blue color resist 730 in the filter layer 700. The second light-emitting area 520 includes a blue light-emitting layer 521 made of blue light-emitting material. The light emitted by the blue light-emitting material is blue light.
[0039] Compared to the scheme where the light-emitting layers 500 corresponding to the red, green, and blue color resists are all made of white light-emitting layer 511, this application uses blue light-emitting material to make the second light-emitting area 520 corresponding to the blue color resist 730, while the first light-emitting areas 510 corresponding to the red and green color resists 710 are made of white light-emitting material. When the display panel 100 is in operation, the light emitted by the second light-emitting area 520 corresponding to the blue color resist 730 is blue light, which can alleviate the problem of blue brightness decay of the display panel 100, thereby increasing the luminous efficiency of the display device and extending the life of the display panel 100.
[0040] Furthermore, the industry typically increases the brightness of the blue pixels of the display panel 100 by increasing the voltage between the cathode 600 and anode 300 corresponding to the blue color resist 730. However, this makes the circuitry of the display panel 100 more complex and increases the burden on the driver chip. Alternatively, the aperture ratio of the red color resist 710 and the green color resist 720 is reduced, which is equivalent to increasing the aperture ratio of the blue color resist 730 in reverse, thereby alleviating the problem of blue brightness decay of the display panel 100. However, this reduces the overall brightness of the display panel 100, which is not conducive to the display of the display panel 100.
[0041] This application alleviates the problem of blue brightness decay in the display panel 100 without changing the driving circuit or reducing the overall brightness of the display panel 100, thereby increasing the luminous efficiency of the display device and extending the life of the display panel 100.
[0042] The following are several specific embodiments that illustrate the improvements of this application:
[0043] Example 1:
[0044] like Figure 2 As shown, the light-emitting layer 500 includes a first light-emitting area 510 and a second light-emitting area 520. The first light-emitting area 510 corresponds to the red color resist 710 and the green color resist 720 in the filter layer 700. The first light-emitting area 510 is a white light-emitting layer 511 made of white light-emitting material. The white light-emitting layer 511 is respectively disposed corresponding to the red color resist 710 and the green color resist 720. The second light-emitting area 520 corresponds to the blue color resist 730 in the filter layer 700, and the second light-emitting area 520 is a blue light-emitting layer 521 made of blue light-emitting material.
[0045] That is, the first light-emitting area 510 corresponding to the red color resist 710 and the green color resist 720 emits only white light, and the second light-emitting layer 500 corresponding to the blue color resist 730 emits only blue light. Although the brightness of the first light-emitting area 510 and the second light-emitting area 520 is the same, the second light-emitting area 520 emits only blue light, which can improve the blue brightness of the display panel 100, thereby alleviating the problem of blue brightness decay of the display panel 100.
[0046] Furthermore, the thickness of the blue color resist 730 in the filter layer 700 can be reduced, that is, the thickness of the color resists of other colors, such as the thickness of the green color resist 720 and the red color resist 710, can be made greater than the thickness of the blue color resist 730. This can further improve the transmittance of the blue emitting layer 521 and increase the blue brightness within the display panel 100. It may even be possible to eliminate the need for the blue color resist 730, thus greatly alleviating the problem of low blue brightness within the display panel 100.
[0047] Example 2:
[0048] Figure 3 A schematic diagram of a display panel according to a second embodiment of this application is disclosed, as follows: Figure 3 As shown, unlike the first embodiment, the second light-emitting area 520 further includes a main light-emitting layer 522, which is made of white light-emitting material and is disposed between the anode 300 and the blue light-emitting layer 521.
[0049] By superimposing a blue light-emitting layer 521 on the main light-emitting layer 522, the brightness of the second light-emitting area 520 is further improved, and the blue brightness in the corresponding display panel 100 is also improved accordingly.
[0050] In the fabrication of the display panel 100, in this embodiment, the main light-emitting layer 522 and the white light-emitting layer 511 of the first light-emitting area 510 are disposed in the same layer, which is equivalent to adding a blue light-emitting layer 521 between the main light-emitting layer 522 corresponding to the blue color resist 730 and the cathode 600, which can reduce the process and improve production efficiency.
[0051] Since the blue pixels are equivalent to adding a blue emitting layer 521, with a thickness of 5-15nm, this embodiment makes the color resists of other colors thicker. For example, the thickness of the red color resist 710 and the green color resist 720 are both greater than or equal to the sum of the thickness of the blue emitting layer 521 and the blue color resist 730. When the thickness of the red color resist 710 and the green color resist 720 are both greater than the sum of the thickness of the blue emitting layer 521 and the blue color resist 730, the blue brightness within the display panel 100 is further enhanced. When the thickness of the red color resist 710, the thickness of the green color resist 720, and the sum of the thickness of the blue emitting layer 521 and the blue color resist 730 are equal, the film layer of the display panel 100 is smoother.
[0052] Furthermore, since this embodiment has a separate filter, when the blue light-emitting layer 521 is prepared between the main light-emitting layer 522 and the cathode 600, even if the blue light-emitting layer 521 is printed between the white light-emitting layer 511 of the adjacent first light-emitting area 510 and the cathode 600, it will not cause blue light to appear in the area corresponding to other color resists, thus preventing color mixing.
[0053] Example 3:
[0054] Figure 4 A schematic diagram of a display panel according to a third embodiment of this application is disclosed, as shown below. Figure 4As shown, unlike the first embodiment, the second light-emitting area 520 further includes an auxiliary light-emitting layer 523. The auxiliary light-emitting layer 523 is disposed between the anode 300 and the main light-emitting layer 522, and the auxiliary light-emitting layer 523 is made of a blue light-emitting material. That is, it can be understood that a blue light-emitting layer 521 is disposed between the cathode 600 and the main light-emitting layer 522, and an auxiliary light-emitting layer 523 is disposed between the anode 300 and the main light-emitting layer 522. The auxiliary light-emitting layer 523 is also equivalent to the blue light-emitting layer 521, further improving the blue brightness within the display panel 100.
[0055] Furthermore, the sum of the thickness of the red color resist 710 and the thickness of the white light-emitting layer 511 is greater than or equal to the sum of the thicknesses of the blue color resist 730, the main light-emitting layer 522, the auxiliary light-emitting layer 523, and the blue light-emitting layer 521; the sum of the thickness of the green color resist 720 and the thickness of the white light-emitting layer 511 is greater than or equal to the sum of the thicknesses of the blue color resist 730, the main light-emitting layer 522, the auxiliary light-emitting layer 523, and the blue light-emitting layer 521; wherein, the thickness of the white light-emitting layer 511 is equal to the thickness of the main light-emitting layer 522.
[0056] When the thickness of the red color resist 710 and the thickness of the green color resist 720 are both greater than the sum of the thickness of the blue color resist 730, the thickness of the auxiliary light-emitting layer 523, and the thickness of the blue light-emitting layer 521, the blue brightness in the display panel 100 is further improved; when the thickness of the red color resist 710 and the thickness of the green color resist 720 are both equal to the sum of the thickness of the blue color resist 730, the thickness of the auxiliary light-emitting layer 523, and the thickness of the blue light-emitting layer 521, the film layer of the display panel 100 is smoother.
[0057] Example 4:
[0058] Figure 5 A schematic diagram of a display panel according to a fourth embodiment of this application is disclosed, as shown below. Figure 5 As shown, unlike the second embodiment, the main light-emitting layer 522 is disposed between the blue light-emitting layer 521 and the cathode 600.
[0059] Specifically, this is equivalent to placing a blue luminescent material between the main luminescent layer 522 and the anode 300. During the fabrication of the display panel 100, a matrix arrangement of anodes 300 is fabricated on the substrate 200, and then a blue luminescent layer 521 is fabricated on the anodes 300 corresponding to the blue color resist 730. Compared to the solution in the first embodiment, the solution in this embodiment does not cause the blue luminescent material to enter the main luminescent layer 522 and affect the white luminescent layer 511 in the first luminescent region 510 from emitting white light.
[0060] Example 5:
[0061] Figure 6 A schematic diagram of a display panel according to a fifth embodiment of this application is disclosed, as shown below. Figure 6 As shown, unlike the second embodiment of this application, a green light-emitting layer 513 is also provided between the white light-emitting layer 511 of the green color resist 720 and the cathode 600 in the first light-emitting area 510, and a red light-emitting layer 512 is also provided between the white light-emitting layer 511 of the red color resist 710 and the cathode 600 in the first light-emitting area 510.
[0062] Specifically, the first light-emitting area 510 further includes a red light-emitting layer 512 and a green light-emitting layer 513. The red light-emitting layer 512 is made of a red light-emitting material, and the green light-emitting layer 513 is made of a green light-emitting material. The red light-emitting layer 512 corresponds to the red color resist 710 in the filter layer 700 and is disposed between the white light-emitting layer 511 and the cathode 600. The green light-emitting layer 513 corresponds to the green color resist 720 in the filter layer 700 and is disposed between the white light-emitting layer 511 and the cathode 600.
[0063] By adding a corresponding color light-emitting layer 500 to the corresponding color resist, the brightness decay of each color resist in the display panel 100 can be mitigated, the service life of the display panel 100 can be improved, and the overall brightness of the display panel 100 can be increased.
[0064] Of course, it is also possible to provide a green light-emitting layer 513 between the white light-emitting layer 511 corresponding to the green color resist 720 and the anode 300 in the first light-emitting area 510, and to provide a red light-emitting layer 512 between the white light-emitting layer 511 corresponding to the red color resist 710 and the anode 300 in the first light-emitting area 510.
[0065] Alternatively, a green light-emitting layer 513 may be provided between the white light-emitting layer 511 and the cathode 600 corresponding to the green color resist 720 in the first light-emitting area 510, and between the white light-emitting layer 511 and the anode 300. A red light-emitting layer 512 may also be provided between the white light-emitting layer 511 and the cathode 600 corresponding to the red color resist 710 in the first light-emitting area 510, and between the white light-emitting layer 511 and the anode 300.
[0066] This application also discloses a method for manufacturing a display panel, which can be used to manufacture the display panel described above. Regarding the method for manufacturing the display panel, this application provides the following design:
[0067] Combination Figure 7 and Figure 8 As shown, this application also discloses a method for manufacturing a display panel 100, which is the manufacturing method of the first embodiment of this application, including the following steps:
[0068] S1: Fabricate multiple arrayed anodes on a substrate;
[0069] S2: Deposit a light-shielding material on the anode, and form a pixel definition layer on the substrate through a mask. The pixel definition layer located between two adjacent anodes is a non-opening area, and an opening area is formed between two adjacent non-opening areas of the pixel definition layer.
[0070] S3: A light-emitting layer consisting of a first light-emitting area and a second light-emitting area arranged side by side is formed in the opening area. The first light-emitting area includes a white light-emitting layer made of white light-emitting material, and the second light-emitting area includes a blue light-emitting layer made of blue light-emitting material.
[0071] S4: A cathode is formed on the light-emitting layer;
[0072] S5: The filter layer is formed on the cathode, such that the blue color resist in the filter layer is disposed on the blue light-emitting layer in the second light-emitting area, and the green and red color resists in the filter layer are disposed on the white light-emitting layer in the first light-emitting area.
[0073] S6: An encapsulation layer is formed on the filter to obtain a display panel.
[0074] like Figure 9 As shown, a method for preparing a display panel according to a second embodiment of this application is disclosed. The method differs from that of the first embodiment in that a main light-emitting layer 522 is formed between the blue light-emitting layer 521 and the anode 300, and the main light-emitting layer 522 and the white light-emitting layer 511 in the first light-emitting area 510 are made in the same layer.
[0075] Specifically, step S3 further includes:
[0076] S31: A light-emitting layer is formed within the opening, consisting of a first light-emitting area and a second light-emitting area arranged side by side. The first light-emitting area includes a white light-emitting layer made of white light-emitting material, and the second light-emitting area includes a main light-emitting layer made of white light-emitting material.
[0077] S32: A blue light-emitting layer is disposed on the main light-emitting layer, the blue light-emitting layer being made of a blue light-emitting material.
[0078] The white light-emitting layer 511 in the first light-emitting area 510 and the main light-emitting layer 522 in the second light-emitting area 520 are made in the same layer, and the blue light-emitting layer 521 is prepared on the main light-emitting layer 522 by printing process.
[0079] Furthermore, such as Figure 10As shown, a method for preparing a display panel according to a third embodiment of this application is disclosed. Unlike the preparation method of the second embodiment, a step of forming an auxiliary light-emitting layer 523 is added before forming the main light-emitting layer 522.
[0080] Specifically, the following steps are included before step S31:
[0081] S30: An auxiliary light-emitting layer is formed inside the opening, the auxiliary light-emitting layer being made of a blue light-emitting material.
[0082] S31: A light-emitting layer consisting of a first light-emitting area and a second light-emitting area arranged side by side is formed in the opening. The first light-emitting area includes a white light-emitting layer made of white light-emitting material, and the second light-emitting area includes a main light-emitting layer made of white light-emitting material.
[0083] The auxiliary light-emitting layer 523 is disposed between the anode 300 and the main light-emitting layer 522.
[0084] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.
[0085] It should be noted that the inventive concept of this application can lead to numerous embodiments, but due to space limitations in the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. The combination of embodiments or technical features will enhance the original technical effect.
[0086] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.
Claims
1. A display panel, characterized by, The display panel includes Substrate; The anode is arranged in a matrix on the substrate. A pixel definition layer is disposed on the substrate and includes an open area and a non-open area, wherein the non-open area is disposed between two adjacent anodes; A light-emitting layer is disposed within the opening area; Cathode, covering the light-emitting layer and the pixel definition layer; A filter layer is disposed on the side of the cathode away from the substrate. The light-emitting layer includes a first light-emitting area and a second light-emitting area. The first light-emitting area is provided corresponding to the red and green color resists in the filter layer, and the second light-emitting area is provided corresponding to the blue color resist in the filter layer. The second light-emitting area includes a blue light-emitting layer, which is made of a blue light-emitting material. The first light-emitting region includes a white light-emitting layer made of white light-emitting material, which is respectively disposed corresponding to the red color resist and the green color resist. The second light-emitting region also includes a main light-emitting layer made of white light-emitting material, which is disposed between the anode and the blue light-emitting layer. The second light-emitting area also includes an auxiliary light-emitting layer, which is disposed between the anode and the main light-emitting layer. The auxiliary light-emitting layer is made of blue light-emitting material, which alleviates the problem of blue brightness decay of the display panel, increases the luminous efficiency of the display device, and extends the life of the display panel without changing the driving circuit.
2. The display panel according to claim 1, characterized in that, The sum of the thickness of the red color resist and the thickness of the white light-emitting layer is greater than or equal to the sum of the thicknesses of the blue color resist, the main light-emitting layer, the auxiliary light-emitting layer, and the blue light-emitting layer. The sum of the thickness of the green color resist and the thickness of the white light-emitting layer is greater than or equal to the sum of the thicknesses of the blue color resist, the main light-emitting layer, the auxiliary light-emitting layer, and the blue light-emitting layer. The thickness of the white light-emitting layer is equal to the thickness of the main light-emitting layer.
3. The display panel of any of claims 1-2, wherein, The main light-emitting layer is disposed in the same layer as the white light-emitting layer in the first light-emitting area.
4. The display panel of claim 1, wherein, The thickness of the green and red color resists in the filter layer is greater than that of the blue color resist.
5. The display panel of claim 1, wherein, The first luminescent region further includes a red luminescent layer and a green luminescent layer, wherein the red luminescent layer is made of a red luminescent material and the green luminescent layer is made of a green luminescent material; The red light-emitting layer corresponds to the red color resist in the filter layer and is disposed between the white light-emitting layer and the cathode. The green light-emitting layer corresponds to the green color resist in the filter layer and is disposed between the white light-emitting layer and the cathode.
6. A display device, characterized by comprising: The display device includes a circuit board and a display panel as described in any one of claims 1-5, wherein the circuit board is electrically connected to the display panel.
7. A method for manufacturing a display panel, characterized by, For manufacturing a display panel as described in any one of claims 1-5, the steps include: Multiple anodes arranged in an array are fabricated on a substrate. A light-shielding material is deposited on the anode, and a pixel definition layer is formed on the substrate through a mask. The pixel definition layer located between two adjacent anodes is a non-opening region, and an opening region is formed between two adjacent non-opening regions of the pixel definition layer. A light-emitting layer consisting of a first light-emitting area and a second light-emitting area arranged side by side is formed in the opening area. The first light-emitting area includes a white light-emitting layer made of white light-emitting material, and the second light-emitting area includes a blue light-emitting layer made of blue light-emitting material. A cathode is formed on the light-emitting layer; The filter layer is formed on the cathode, with the blue color resist in the filter layer disposed on the blue light-emitting layer in the second light-emitting area, and the green and red color resists in the filter layer disposed on the white light-emitting layer in the first light-emitting area.