OLED Display Support Member Pattern for Uniform Pixel Development
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Solution Overview
Problem
Existing display device manufacturing processes face issues such as substrate damage and stain generation due to mask pressing and uneven development in the display area, which can lead to defective pixels.
Innovation Solution
A display device design featuring a support member with a patterned organic material layer in the peripheral area, matching the density and structure of the pixel openings, to prevent substrate pressing and ensure uniform development, thereby preventing stains and maintaining pixel integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mask is used to form patterns during manufacturing, then manufacturing precision is improved, but the substrate may be damaged and wires may be damaged due to pressing
Solution Approach 1:
A support member is introduced as an intermediary component between the mask and the substrate. This support member receives the pressing force from the mask during pattern formation, preventing direct contact and damage to the substrate and underlying wires, while still allowing the mask to form patterns with required precision
2Reliability
If a support member is added to protect the substrate, then substrate integrity is improved, but device complexity increases
Solution Approach 1:
The support member serves multiple functions simultaneously: it protects the substrate from mask pressing, provides a structural base for forming the pixel defining layer, and maintains spatial relationships between components. This multi-functionality reduces the need for additional separate protective components, thereby limiting the increase in device complexity
3Manufacturing precision
If a pixel defining layer is formed to define pixel regions, then manufacturing precision is improved, but stains may be generated in the display area
Solution Approach 1:
The support member is formed in advance before the pixel defining layer is deposited. This preliminary structure provides a stable foundation that prevents deformation during subsequent manufacturing steps, ensuring that the pixel defining layer maintains precise boundaries without generating stains in the display area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents substrate damage and stain generation during manufacturing, ensuring uniform development and maintaining pixel integrity by matching the support member pattern with the pixel openings, thus enhancing the reliability and quality of the display device.
Implementation Method 1
The support member may further include a plurality of organic insulating material layers
Implementation Method 2
The pixel defining layer may include a light blocking material
Data Source
AI summary
A display device includes: a substrate having a display area and a peripheral area at a side of the display area; a transistor in the display area of the substrate; a first electrode connected to the transistor; a pixel defining layer on the first electrode and having a plurality of pixel openings; an emission layer in respective ones of the pixel openings; a second electrode on the emission layer and the pixel defining layer; a driver in the peripheral area of the substrate; and a support member overlapping the driver. The support member includes a support member pattern layer on a same layer as the pixel defining layer and having repeated patterns