Display Sub-Pixel Interval Design for Electrical Coupling Reduction
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Solution Overview
Problem
Current display apparatuses face challenges in achieving high-quality image display due to the configuration and arrangement of sub-pixels, particularly in the intervals and connections between metal layers and semiconductor layers, which affect the efficiency and color accuracy of light emission.
Innovation Solution
The display apparatus is designed with a specific configuration of sub-pixels, including varying intervals between metal and semiconductor layers, and pixel electrodes that overlap or are connected in specific patterns to reduce electrical coupling and enhance color purity, allowing for the efficient display of different colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the interval between the second lower metal and the first semiconductor layer is increased, then electrical coupling between sub-pixels is reduced, but the area occupied by each sub-pixel increases
Solution Approach 1:
The patent applies different interval sizes at different locations: a first interval between the first lower metal and first semiconductor layer, and a second interval between the second lower metal and first semiconductor layer, where the second interval is greater than the first interval. This local differentiation reduces electrical coupling at critical interfaces while minimizing overall area increase.
Solution Approach 2:
The patent introduces asymmetric interval design where the spacing between metal layers and semiconductor layers is not uniform. Specifically, the interval between the second lower metal and first semiconductor layer is deliberately made larger to reduce parasitic coupling, breaking the symmetry of uniform spacing to achieve better electrical isolation.
2Reliability
If pixel electrodes are arranged to overlap metal layers, then electrical connection is improved, but color purity decreases due to increased electrical coupling
Solution Approach 1:
The patent implements selective overlapping where the second pixel electrode partially overlaps the first lower metal and third lower metal, but with controlled extent. This local overlap provides necessary electrical connection while limiting the area of coupling to maintain color purity in the majority of the pixel electrode region.
Data Source
AI summary
A display apparatus includes a first sub-pixel including a first lower metal, a first semiconductor layer on the first lower metal, and a first upper metal on the first semiconductor layer; a second sub-pixel including a second lower metal, a second semiconductor layer on the second lower metal, and a second upper metal on the second semiconductor layer; and a third sub-pixel including a third lower metal, a third semiconductor layer on the third lower metal, and a third upper metal on the third semiconductor layer, wherein an interval between the second lower metal and the first semiconductor layer is greater than an interval between the second semiconductor layer and the first semiconductor layer in a plan view, and wherein a first sub-pixel, a second sub-pixel, and a third sub-pixel configured to display light of different colors.