Display Device Asymmetric Pixel Spacing and Segmented Electrodes
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Solution Overview
Problem
Current display devices face challenges in achieving optimal transmittance in transmissive areas due to the coverage of opposite electrodes, which reduces the brightness and efficiency of light emission.
Innovation Solution
The display device incorporates a substrate with a first and second pixel unit, each comprising multiple pixel areas emitting different colors, with separate opposite electrodes that overlap and are electrically connected, allowing for improved transmittance by avoiding coverage of transmissive areas and maintaining sufficient contact between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If opposite electrodes are disposed to cover pixel units, then electrical connection and structural integrity are ensured, but transmittance in transmissive areas is reduced
Solution Approach 1:
The opposite electrodes are segmented into first and second opposite electrodes corresponding to first and second pixel units, respectively. This segmentation allows each electrode to be independently positioned and sized, enabling them to cover only the pixel unit areas while leaving transmissive areas uncovered, thus maintaining electrical connection reliability while improving transmittance
Solution Approach 2:
The opposite electrodes are selectively disposed only over the pixel unit areas and not over the transmissive areas. This local quality approach ensures that electrical connection is maintained where needed (over pixel units) while transmittance is preserved where required (in transmissive areas), resolving the contradiction between these two requirements
2Illumination intensity
If opposite electrodes are made smaller to avoid transmissive areas, then transmittance is improved, but contact area between electrodes is reduced
Solution Approach 1:
The first and second opposite electrodes are electrically connected to each other, forming a continuous conductive path. This merging ensures that even though each electrode is sized to avoid transmissive areas, their combined structure maintains sufficient contact area and electrical connection reliability, while still improving overall transmittance by avoiding coverage of transmissive areas
3Area of stationary object
If pixel areas are arranged closer together, then device area is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The pixel areas within each pixel unit are arranged asymmetrically with different spacing relationships. Specifically, the first pixel unit has a first pixel area with a first distance to a second pixel area, while the second pixel unit has a third pixel area with a second distance to the first pixel area, where the first distance is less than the second distance. This asymmetric arrangement optimizes device area while maintaining manufacturable precision by varying spacing based on functional requirements
Data Source
AI summary
A display device includes: a substrate; a first pixel unit disposed over the substrate and including at least two pixel areas emitting lights of different colors; a second pixel unit neighboring the first pixel unit and including at least two pixel areas emitting lights of different colors; a first opposite electrode disposed on an area corresponding to the first pixel unit; and a second opposite electrode disposed on an area corresponding to the second pixel unit, wherein the first pixel unit includes a first pixel area and a second pixel area that neighbor each other, the second pixel unit includes a third pixel area and a fourth pixel area that neighbor each other, and a first distance between the first pixel area and the second pixel area is less than a second distance between the third pixel area and the first pixel area.