Display Pixel-Circuit Protrusions for Light Emitter Alignment
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Solution Overview
Problem
Existing display devices face challenges in improving production yield and alignment quality of light emitting elements, leading to inefficiencies in manufacturing and performance.
Innovation Solution
The proposed display device includes a pixel-circuit layer with lower lines forming a protruding structure in the outer-dam area, which enhances alignment by restricting the movement of light emitting elements and improving the alignment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are placed on the base layer without additional structures, then the manufacturing process is simple, but the alignment quality and placement precision are poor
Solution Approach 1:
The protruding structure is formed in advance during the manufacturing process, before light emitting elements are placed. This preliminary formation of the protruding structure creates pre-defined alignment references that guide the placement of light emitting elements, thereby improving alignment quality without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The protruding structure acts as an intermediary element between the base layer and the light emitting elements. It provides a physical reference and alignment guide that mediates the placement process, enabling precise positioning of light emitting elements without direct complex positioning systems
2Productivity
If traditional manufacturing processes are used without protruding structures, then the production process is straightforward, but the production yield is low due to poor alignment
Solution Approach 1:
The protruding structure is formed as part of the base layer manufacturing process, establishing alignment references before light emitting element placement. This preliminary action ensures that subsequent placement operations can proceed efficiently with high precision, thereby improving production yield without requiring entirely new manufacturing processes
Solution Approach 2:
The protruding structure serves itself as both a structural component and an alignment reference. By integrating the alignment function into the existing base layer structure, the system improves production yield without requiring separate alignment mechanisms or additional manufacturing steps
Data Source
AI summary
A display device including an internal area and a peripheral area surrounding at least a portion of the internal area includes a pixel-circuit layer disposed on a base layer and including lower lines, at least a portion of which form a pixel circuit, and sub-pixels disposed on the pixel-circuit layer and including a light emitting element electrically connected to the pixel circuit. The internal area includes a pixel area on which the sub-pixels are disposed, and an outer-dam area formed at a periphery of the pixel area. In the outer-dam area, at least another portion of the lower lines are stacked in a thickness direction of the base layer to form a protruding structure.