OLED display structure

Abstract

The utility model discloses an OLED display structure, which comprises an array substrate, a group of pixel units are arranged on the array substrate, each pixel unit comprises an anode, an organic light-emitting layer arranged on the anode and a cathode layer arranged on the organic light-emitting layer, a pixel definition layer is arranged around the anode of the pixel unit, and the cathode layer is arranged on the organic light-emitting layer. A partition structure used for disconnecting the organic light-emitting layer is arranged corresponding to the pixel definition layer, and a reflection structure used for increasing reflected light is arranged on the pixel definition layer. The OLED display is reasonable in structural design, the partition structure is used for disconnecting the OLED organic layer, the reflection structure is used for reflecting large-angle light, and the light emitting efficiency of the OLED is improved; the opening of the partition layer above the anode is smaller than that of the reflecting layer and plays a light extraction role; in the anode gap, the opening of the partition layer is larger than the opening of the reflecting layer, and the partition layer and the reflecting layer form an undercut structure which is used for disconnecting an electric conduction layer in the organic film layer and reducing crosstalk of the device.

Description

An OLED display structure Technical Field

[0001] This utility model relates to the field of OLED display technology, and in particular to an OLED display structure. Background Technology

[0002] OLED devices exhibit significant crosstalk, which affects display clarity and color at low grayscale levels. Additionally, due to differences in refractive index, there is substantial light loss within the device, impacting its brightness and consequently affecting the display performance.

[0003] For example, patent CN105552249A discloses an OLED display substrate and its manufacturing method and display device; the OLED display substrate is a top-emitting OLED display substrate, including a reflective layer covering the side of the pixel defining layer, thereby the reflective layer and the first electrode of the OLED form a reflective cup structure, increasing the reflection of light emitted by the OLED; the improvement effect needs to be improved. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an OLED display structure to reduce crosstalk between devices and improve OLED light extraction efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] The OLED display structure includes an array substrate on which a set of pixel units are disposed. Each pixel unit includes an anode, an organic light-emitting layer disposed on the anode, and a cathode layer disposed on the organic light-emitting layer. A pixel definition layer is disposed around the anode of the pixel unit. A partition structure for disconnecting the organic light-emitting layer is disposed corresponding to the pixel definition layer. A reflective structure for increasing reflected light is provided on the pixel definition layer.

[0007] Further or preferred:

[0008] The reflective structure is a metal layer, and the edges of the reflective structure are beveled.

[0009] The metal layer is an aluminum layer.

[0010] The inclined angle of the reflective structure is 50-90 degrees.

[0011] Both the partition structure and the reflective structure are layered structures formed by etching after deposition.

[0012] Above the anode, the opening of the partition structure is smaller than the opening of the reflective structure.

[0013] In the anode gap, the opening of the partition structure is larger than the opening of the reflective structure.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] The OLED display has a reasonable structural design. The partition structure is used to disconnect the OLED organic layer, and the reflective structure is used to reflect large-angle light to improve the light extraction efficiency of the OLED. The opening of the partition layer above the anode is smaller than the opening of the reflective layer, which plays a role in light extraction. In the anode gap, the opening of the partition layer is larger than the opening of the reflective layer. The two together form an undercut structure, which is used to disconnect the electrically conductive layer in the organic film layer and reduce crosstalk of the device. Attached Figure Description

[0016] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0017] Figure 1 is a schematic diagram of the reflective layer deposition of this utility model.

[0018] Figure 2 is a schematic diagram of pixel opening etching of this utility model.

[0019] Figure 3 is a schematic diagram of the bottom cutting etching of this utility model.

[0020] Figure 4 is a schematic diagram of the organic layer and cathode deposition of this utility model.

[0021] Figure 5 is a schematic diagram of the reflective layer of this utility model reflecting light. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0023] As shown in Figures 1 to 5, the OLED display structure includes an array substrate on which a set of pixel units are disposed; the pixel unit includes an anode, an organic light-emitting layer disposed on the anode, and a cathode layer disposed on the organic light-emitting layer, and a pixel definition layer is disposed around the anode of the pixel unit.

[0024] The corresponding pixel definition layer is equipped with a partition structure to disconnect the organic light-emitting layer, and the pixel definition layer is provided with a reflective structure to increase reflected light.

[0025] The reflective structure is a metal layer, and the edges of the reflective structure are beveled; preferably, the metal layer material can be aluminum, titanium, or silver.

[0026] Furthermore, the inclined surface of the reflective structure has an angle of 50-90 degrees to reflect large-angle light and improve the light output efficiency of the OLED.

[0027] Both the partition structure and the reflective structure are layered structures formed by etching after deposition; namely, the partition layer and the reflective layer. As shown in Figure 1, the partition layer and the reflective layer are deposited first; as shown in Figure 2, the pixel opening is etched; as shown in Figure 3, the undercut is etched; as shown in Figure 4, the organic layer and the cathode are finally deposited.

[0028] Above the anode, the opening of the partition layer is smaller than the opening of the reflective layer, which serves to extract light; in the anode gap, the opening of the partition layer is larger than the opening of the reflective layer, forming a partition structure that disconnects the electrically conductive layer in the organic film layer and reduces crosstalk in the device.

[0029] In this solution, the partition structure can be an inorganic material or an organic material; the reflective structure can be a metal or other materials with high reflective properties; the partition structure can disconnect the vapor-deposited organic materials, including high crosstalk films such as hole injection layers and charge generation layers, to improve crosstalk in OLED displays; the reflective layer can reflect large-angle light, change its direction, and increase light output at the positive viewing angle.

[0030] The above description is only a preferred embodiment of the present utility model. The above technical features can be arbitrarily combined to form multiple embodiments of the present utility model.

[0031] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An OLED display structure, comprising an array substrate, wherein a group of pixel units are disposed on the array substrate, the pixel unit comprising an anode, an organic light-emitting layer disposed on the anode, and a cathode layer disposed on the organic light-emitting layer, and a pixel definition layer is disposed around the anode of the pixel unit, characterized in that: The corresponding pixel definition layer is provided with a partition structure for disconnecting the organic light-emitting layer, and the pixel definition layer is provided with a reflective structure for increasing reflected light; the reflective structure is a metal layer, and the edge of the reflective structure is a slope; the slope angle of the reflective structure is 50-90 degrees; above the anode, the opening of the partition structure is smaller than the opening of the reflective structure. In the anode gap, the opening of the partition structure is larger than the opening of the reflective structure.

2. The OLED display structure as described in claim 1, characterized in that: The metal layer is an aluminum layer.

3. The OLED display structure as described in claim 1, characterized in that: Both the partition structure and the reflective structure are layered structures formed by etching after deposition.

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