Display Device Line-Free and Electrode-Free Area Overlap
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Solution Overview
Problem
Existing display devices face challenges in achieving improved alignment of light emitting elements and ensuring sufficient performance of pixel circuits.
Innovation Solution
A display device structure is proposed, featuring a base layer with a pixel circuit layer and a light-emitting-element layer. The pixel circuit layer includes lower lines and a line-free area, while the light-emitting-element layer has electrodes and an electrode-free area. These areas are designed to overlap in a plan view, enhancing the alignment of light emitting elements and supporting the performance of pixel circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lower lines are present in all areas, then pixel circuit performance is maintained, but light emitting element alignment is degraded
Solution Approach 1:
The display device is divided into multiple sub-pixels (first, second, and third sub-pixels), each with its own pixel circuit. The lower lines are selectively present or absent in different sub-pixel areas, allowing independent optimization of alignment and circuit performance for each region without compromising the overall device functionality.
2Manufacturing precision
If electrodes are present in all areas, then light emitting element alignment is maintained, but manufacturing complexity is increased
Solution Approach 1:
The electrode configuration varies by location: the first electrode is present in the first sub-pixel area, while the second electrode is selectively present or absent in the second and third sub-pixel areas. This local differentiation allows the structure to provide alignment functionality where needed while reducing complexity where it is not required.
Data Source
AI summary
A display device includes: a base layer; a pixel circuit layer on the base layer, the pixel circuit layer including lower lines, the pixel circuit layer having a line-free area in which the lower lines are not present; and a light-emitting-element layer on the pixel circuit layer, the light-emitting-element layer including electrodes and a light emitting element on the electrodes, the light-emitting-element layer having an electrode-free area in which the electrodes are not present. The line-free area overlaps the electrode-free area in a plan view.