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CN-122028616-A - Display panel, preparation method of display panel, display device and electronic equipment

CN122028616ACN 122028616 ACN122028616 ACN 122028616ACN-122028616-A

Abstract

The application provides a display panel, a preparation method of the display panel, a display device and electronic equipment. The display panel comprises a pixel area and an isolation area, wherein the isolation area is positioned between two adjacent pixel areas. The isolation region comprises an isolation structure, a first light-emitting layer first part, a charge generation layer first part, a second light-emitting layer first part and a second electrode first part which are sequentially arranged along a first direction, and the pixel region comprises a first electrode, a first light-emitting layer second part, a charge generation layer second part, a second light-emitting layer second part and a second electrode second part which are sequentially arranged along the first direction. Due to the arrangement of the isolation structure, the first part of the charge generation layer is discontinuous with the second part of the charge generation layer, so that crosstalk can be reduced, the problem of low-brightness low-gray-scale display scene smear of the display panel is solved, and the display effect is improved. The first portion of the second electrode is continuous with the second portion of the second electrode, thereby reducing power consumption of the display panel.

Inventors

  • ZHONG JIEXING
  • WANG TIESHI

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260512
Application Date
20250709
Priority Date
20250418

Claims (17)

  1. 1. A display panel comprising a pixel region and an isolation region, the isolation region being located between two adjacent pixel regions, wherein: The isolation region comprises an isolation structure, a first light-emitting layer first part, a charge generation layer first part, a second light-emitting layer first part and a second electrode first part which are sequentially arranged along a first direction; The pixel region includes a first electrode, a first light emitting layer second portion, a charge generating layer second portion, a second light emitting layer second portion, and a second electrode second portion arranged in this order along the first direction; the charge generation layer first portion and the charge generation layer second portion are discontinuous, and the second electrode first portion and the second electrode second portion are continuous.
  2. 2. The display panel of claim 1, wherein a sum H1 of a thickness of the first light-emitting layer second portion and a thickness of the charge-generating layer second portion, a sum H of a thickness of the first light-emitting layer second portion, a thickness of the charge-generating layer second portion and a thickness of the second light-emitting layer second portion, and a thickness H of the isolation structure satisfy H1< H.
  3. 3. The display panel according to claim 1 or 2, wherein the isolation structure includes a first structure portion and a second structure portion, the first structure portion protrudes from a first surface of the second structure portion, the first surface is a connection surface of the first structure portion and the second structure portion, and a sum H1 of a thickness of the second portion of the first light emitting layer and a thickness of the second portion of the charge generating layer and a thickness H1 of the second structure portion satisfy H1< H1.
  4. 4. The display panel of claim 3, wherein the first structure portion is a layer of insulating material and the second structure portion includes at least one of a metal, an inorganic material, or an organic material.
  5. 5. The display panel of any one of claims 2-4, wherein the second structure portion is a metal layer, the display panel further comprises a trace layer, the second structure portion is electrically connected to the trace layer, and the second structure portion is electrically connected to the second portion of the charge generation layer.
  6. 6. The display panel according to any one of claims 1 to 5, wherein the isolation structure on the peripheral side of one of the pixel regions forms a closed ring or the isolation structure on the peripheral side of one of the pixel regions forms an open ring.
  7. 7. The display panel of any one of claims 1-6, wherein the first electrode, the first light-emitting layer second portion, the charge-generating layer second portion, the second light-emitting layer second portion, and the second electrode second portion of one pixel region form one subpixel.
  8. 8. The display panel of claim 7, comprising a plurality of the sub-pixels, the plurality of sub-pixels including a first sub-pixel and a second sub-pixel, the first sub-pixel having a thickness greater than a thickness of the second sub-pixel, the isolation structure on the peripheral side of the first sub-pixel having a thickness greater than a thickness of the isolation structure on the peripheral side of the second sub-pixel.
  9. 9. The display panel according to claim 7, comprising a plurality of the sub-pixels including a first sub-pixel and a second sub-pixel, wherein a thickness of the first sub-pixel and a thickness of the second sub-pixel are different, a thickness of an isolation structure located at a peripheral side of the first sub-pixel and a thickness of an isolation structure located at a peripheral side of the second sub-pixel are the same, and a thickness of the isolation structure is greater than a sum of a thickness of the first light emitting layer and a thickness of the charge generating layer of the first sub-pixel and less than a sum of a thickness of the first light emitting layer, a thickness of the charge generating layer, and a thickness of the second light emitting layer of the first sub-pixel.
  10. 10. The display panel according to any one of claims 7 to 9, wherein the display panel comprises a plurality of the sub-pixels, the plurality of the sub-pixels form a plurality of pixel units, the plurality of the sub-pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels, one of the pixel units comprises one of the red sub-pixels, one of the blue sub-pixels and two of the green sub-pixels arranged in two rows and two columns, and the two of the green sub-pixels are arranged along one diagonal line of the pixel unit.
  11. 11. The display panel according to any one of claims 1 to 10, comprising a plurality of the pixel regions, wherein the isolation structures on the peripheral sides of the plurality of pixel regions are integrally formed to form an isolation net.
  12. 12. The display panel according to any one of claims 1 to 11, comprising a plurality of the pixel regions, wherein the isolation region between two adjacent pixel regions has two of the isolation structures.
  13. 13. The display panel according to any one of claims 1 to 12, wherein the width of the isolation structure is 1 μm to 10 μm.
  14. 14. A method for manufacturing a display panel according to any one of claims 1 to 13, comprising: Preparing a hole on a first side surface of the substrate; Preparing a first metal layer on the first side surface of the substrate, and filling a first metal structure in the hole, wherein the first metal layer is electrically connected with a wiring layer on the second side surface of the substrate through the first metal structure; Preparing a first structure part of an isolation structure on the surface of the first metal layer; patterning the first metal layer to separate the second structure portion of the isolation structure and the first electrode.
  15. 15. A method for manufacturing a display panel according to any one of claims 1 to 13, comprising: Preparing a hole on a first side surface of the substrate; preparing a first electrode on the first side surface of the substrate, and filling a second metal structure in a part of holes in the holes, wherein the first electrode is electrically connected with a wiring layer on the second side surface of the substrate through the second metal structure; Preparing a second structure part of an isolation structure on the first side surface of the substrate, and filling a third metal structure in another part of the holes, wherein the second structure part is electrically connected with the wiring layer on the second side surface of the substrate through the third metal structure; Preparing a first structure part of an isolation structure on the surface of the second structure part; And cutting the end part of the second structure part towards the first structure part to form an isolation groove.
  16. 16. A display device, comprising a cover plate and the display panel according to any one of claims 1 to 13, wherein the cover plate is disposed on a display side of the display panel.
  17. 17. An electronic device comprising a housing and the display device of claim 16, the display device being coupled to the housing.

Description

Display panel, preparation method of display panel, display device and electronic equipment Cross Reference to Related Applications The present application claims priority from the chinese patent application filed at month 18 of 2025, the title of the national intellectual property agency of the people's republic of China, application number 202510505866.6, entitled "display Panel, method of manufacturing display Panel, display device and electronic device", the entire contents of which are incorporated herein by reference. Technical Field The present application relates to the field of display technologies, and in particular, to a display panel, a method for manufacturing the display panel, a display device, and an electronic apparatus. Background Organic light-emitting diode (OLED) display devices have been listed as display technologies with great development prospects due to their advantages of thinness, lightness, wide viewing angle, active light emission, continuous and adjustable emission color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high luminous efficiency, flexible display, and the like. In the field of OLED display panels, a structure that is currently more commonly used is a stacked or tandem structure (tandem), and tandem is a technology for improving device performance by vertically stacking a plurality of light emitting layers. The core design is that a charge generation layer (charge generation layer, CGL) is used to connect a plurality of independent luminescent layers to form a series structure. So that the sub-pixel has higher luminous brightness and luminous efficiency. The charge generation layer is specifically positioned between the stacked light-emitting layers and is responsible for redistributing electrons and holes to the adjacent light-emitting layers, so that efficient charge separation and injection are realized. However, since the current efficiency of the tandem structure is doubled and the conductivity of the charge generation layer 04 is strong, when a certain sub-pixel is turned on, other sub-pixels adjacent to the surrounding are turned on due to the lateral current conducted by the charge generation layer 04, and the low-gray-scale crosstalk problem is deteriorated. In addition, the charge generation layer can generate capacitance with the anode and the cathode of the OLED, so that low-brightness low-gray-scale display scene smear is easy to be deteriorated. Disclosure of Invention The application provides a display panel, a preparation method of the display panel, a display device and electronic equipment, which are used for reducing crosstalk between pixel areas, improving display effect and reducing power consumption of the display panel. In a first aspect, the present application provides a display panel. The display panel comprises pixel areas and isolation areas, wherein the isolation areas are positioned between two adjacent pixel areas, or the isolation areas are arranged around the pixel areas. The pixel region comprises a first electrode, a first light-emitting layer second part, a charge generation layer second part, a second light-emitting layer second part and a second electrode second part which are sequentially arranged along a first direction. Because isolation region has set up isolation structure for charge generation layer first part and charge generation layer second part are discontinuous, then form the gap between charge generation layer first part and the charge generation layer second part, charge generation layer first part and charge generation layer second part realize insulating interval setting in gap department, this scheme makes adjacent two pixel region's charge generation layer electrical disconnection, when lighting a certain pixel region, the adjacent pixel region is difficult for being lighted because of the side direction electric current of charge generation layer conduction, can reduce the crosstalk, and then make the display effect promote. In addition, the first part of the second electrode is continuous with the second part of the second electrode, namely the second electrode is of a continuous layer structure, so that the problem of lap joint between the charge generation layer and the second electrode can not occur, the second electrode is not easy to break, and the reliability of the display panel can be improved. Moreover, the scheme also enables the continuous second electrode to have lower transverse resistance, which is beneficial to reducing the power supply voltage drop (IR drop), thereby reducing the power consumption of the display panel. In addition, the charge generation layer of the pixel region is divided into regions with smaller areas by the isolation structure, namely, the second part of the charge generation layer has smaller area, so that parasitic capacitance generated by the pixel region can be reduced, the prob