Coaxially Stacked Sub-Pixels for Compact Display Panels
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Solution Overview
Problem
Conventional display panels face challenges in reducing size due to coplanar pixel arrangements, which complicate manufacturing and result in low yield.
Innovation Solution
The display panel design features coaxially stacked sub-pixels, with each pixel comprising multiple sub-pixels emitting different colors sequentially, connected via metal circuit layers and pulse conducting electrodes, allowing for reduced volume and simplified production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If coplanar arrangement of pixels is used, then image quality and color quality can be maintained, but display panel size cannot be reduced and manufacturing becomes complex with low yield
Solution Approach 1:
The patent transitions from a two-dimensional coplanar arrangement to a three-dimensional stacked arrangement where sub-pixels are positioned at different heights along the vertical direction. This dimensional change allows pixels to be arranged more compactly in the horizontal plane while maintaining color quality through sequential emission of different colored sub-pixels at stacked positions, thereby reducing overall display panel size without compromising manufacturing feasibility
Solution Approach 2:
Each pixel is segmented into multiple sub-pixels (red, green, blue) that are spatially separated and stacked at different positions. These segmented sub-pixels emit light sequentially rather than simultaneously, allowing the display to maintain full-color capability while using a more compact three-dimensional structure that simplifies manufacturing processes and improves production yield
2Productivity
If coplanar arrangement of pixels is used, then image quality and color quality can be maintained, but manufacturing yield is low
Solution Approach 1:
By moving from planar to three-dimensional stacked arrangement, the patent reduces the precision requirements for horizontal positioning while maintaining color accuracy through vertical stacking. The sequential emission control of stacked sub-pixels compensates for any minor positioning variations, thereby improving manufacturing yield without sacrificing pixel arrangement precision
Solution Approach 2:
The patent employs periodic sequential emission of different colored sub-pixels (red, green, blue) in a fixed cycle. This periodic action allows for more tolerant manufacturing processes where slight variations in sub-pixel positioning can be compensated through timing-controlled sequential emission, thereby improving manufacturing yield while maintaining image quality
Data Source
AI summary
A display panel includes a substrate and a plurality of pixels on the substrate. Each of the plurality of pixels includes a plurality of sub-pixels coaxially stacked. Each of the plurality of sub-pixels includes a conductive layer, a light-emitting layer connected to the conductive layer, and a base layer. The plurality of pixels arranged in an array on a plane vertical to a stacking direction of the plurality of sub-pixels. The conductive layer is configured to transmit electrical signal. The light-emitting layer is configured to emit light according to the electrical signal. The base layers of the sub-pixels with a same sequence along the stacking direction are connected with each other.