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Display substrate, manufacturing method thereof and display device

A display substrate and pixel definition layer technology, applied to electrical components, electrical solid devices, circuits, etc., can solve the problem of yellowish color of white screen

Active Publication Date: 2020-10-13
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes the overall color of the white picture mixed with red, green, and blue light to be yellowish at a large viewing angle.

Method used

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  • Display substrate, manufacturing method thereof and display device
  • Display substrate, manufacturing method thereof and display device
  • Display substrate, manufacturing method thereof and display device

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Effect test

Embodiment 1

[0055] In recent years, OLED display technology has attracted more attention due to its characteristics of active light emission, high luminous brightness, high resolution, wide viewing angle, fast response speed, low energy consumption and flexibility. In OLED display technology, the yellowish color of white screens under different viewing angles is one of the main reasons restricting the further development of OLED display technology, which seriously affects user experience. The following explains the yellowish color problem of the white screen from the principle:

[0056] refer to figure 2 As shown, the light-emitting modes of the OLED light-emitting functional layer 100 can be divided into three types: figure 2 The horizontal light emission along the pixel boundary layer 1 shown in the direction ① in the middle, as shown in figure 2 The light output along the interface between the light-emitting functional layer 100 and the pixel defining layer 1 shown in the directio...

Embodiment 2

[0090] An embodiment of the present invention provides a display device, which includes the display substrate as provided in Embodiment 1.

[0091] The display device may further include a cover plate. The display device is formed after the cover plate is boxed with the above-mentioned display substrate. The display substrate included in the display device is provided with a supporting layer in the first opening of the pixel defining layer, thereby raising the blue light-emitting functional layer, so that the front light emission ratio of the blue light-emitting functional layer is increased, and the lateral light emission ratio is reduced; , the brightness attenuation degree of the blue light emitted by the blue light-emitting functional layer is closer to that of the red light and green light; thus, it can improve the brightness attenuation of the blue light greater than the brightness attenuation of the red light and green light, resulting in a large viewing angle. The ove...

Embodiment 3

[0094] An embodiment of the present invention provides a method for manufacturing a display substrate as provided in Embodiment 1. The structure of the display substrate can be referred to image 3 As shown, the method includes:

[0095] S01, forming a support layer.

[0096] The above-mentioned supporting layer may be an organic material or an inorganic material other than metal. Exemplarily, the above-mentioned support layer can be made of organic material photoresist, specifically, polyimide photoresist (PI glue) can be used as the photoresist.

[0097] The specific method for forming the support layer is not limited, and may be determined according to actual conditions. For example, the support layer can be formed by inkjet printing process, or the support layer can be formed by coating process.

[0098] S02, forming an anode; Figure 8 As shown, the anode 3 is located on the support layer 2 .

[0099] S03, forming a pixel definition layer (PDL layer).

[0100] The a...

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Abstract

The invention provides a display substrate, a manufacturing method thereof and a display device, and relates to the technical field of display. The display substrate includes a pixel defining layer including a plurality of first openings for defining a blue light-emitting functional layer, supporting layers, and an anode. The supporting layers are arranged in the first openings, and the blue light-emitting functional layer covers the supporting layers; the anode is arranged between the supporting layers and the blue light-emitting functional layer; the opening depth of the first opening in a direction perpendicular to the pixel defining layer is larger than or equal to the sum of the thickness of the supporting layers, the thickness of the blue light-emitting functional layer and the thickness of the anode in a direction perpendicular to the pixel defining layer. The manufacturing method is suitable for manufacturing the display substrate.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display substrate, a manufacturing method thereof, and a display device. Background technique [0002] With the rapid development of OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) display technology, while satisfying individual needs of users, this type of display device also exposes some problems. Among them, the yellowish color of the white screen under large viewing angles seriously affects the user experience and is one of the main reasons restricting the further development of OLED display technology. [0003] The problem of the yellowish color of the white screen at a large viewing angle is closely related to the different degrees of luminance attenuation (L-Decay) of the red, green, and blue sub-pixels. like figure 1 As shown, the brightness attenuation curves of the red, green, and blue sub-pixels under different viewing angles do not overlap. Thi...

Claims

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Application Information

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IPC IPC(8): H01L27/32
CPCH10K59/122H10K59/1201
Inventor 郝艳军屈财玉杜小波李彦松
Owner BOE TECH GRP CO LTD
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