Display Panel Power-Line Layout for Precise Pixel Drive Control
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Solution Overview
Problem
In existing display panels, the light emitting units share a common electrode, which can lead to inefficiencies and limitations in the design and functionality of the pixel driving circuit.
Innovation Solution
The display panel incorporates a unique configuration with separate power lines and a common electrode layer, connected via via holes, and includes specific transistor and conductive layer arrangements to optimize the pixel driving circuit, allowing for improved connectivity and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common electrode is shared by multiple light emitting units, then device complexity is reduced, but manufacturing precision and control capability deteriorate
Solution Approach 1:
The patent divides the common electrode into multiple separate electrode structures, with each light emitting unit having its own dedicated electrode. This segmentation allows independent control of each pixel driving circuit while maintaining the benefits of a distributed electrode architecture, thereby resolving the contradiction between device complexity and manufacturing precision.
Solution Approach 2:
The patent introduces via holes to connect different conductive layers (third conductive layer and fourth conductive layer) in the vertical dimension. This dimensional transition enables complex three-dimensional wiring arrangements that improve control precision without significantly increasing planar device complexity.
2Ease of operation
If separate power lines are introduced for each light emitting unit, then control capability improves, but device complexity increases
Solution Approach 1:
The patent utilizes the vertical dimension by introducing via holes that connect power lines across different conductive layers. This allows separate power lines for each light emitting unit to be routed through the third and fourth conductive layers, improving control capability while managing complexity through three-dimensional integration rather than planar expansion.
Solution Approach 2:
The third and fourth conductive layers serve multiple functions: they provide separate power line routing for individual light emitting units, connect to the segmented electrode structures, and maintain electrical connectivity through via holes. This multi-functionality reduces the need for additional dedicated structures, balancing control capability with device complexity.
3Adaptability or versatility
If via holes are used to connect power lines across conductive layers, then connectivity improves, but manufacturing precision requirements increase
Solution Approach 1:
The via holes serve multiple purposes: connecting the third conductive layer to the fourth conductive layer, enabling power line continuity across layers, and facilitating the segmented electrode structure. This multi-functionality justifies the increased manufacturing precision requirements, as the same via hole structures provide multiple critical connections rather than requiring separate dedicated via holes for each function.
Data Source
AI summary
A display panel includes a pixel drive circuit for driving a light emitting unit. The pixel drive circuit is connected to the first electrode of the light emitting unit, and the display panel further includes: a base substrate, a first power line, a second power line, and a common electrode layer. The first power line and the second power line are located at the display area of the display panel, the orthographic projection of the first power line on the base substrate is extended along the first direction, the orthographic projection of the second power line on the base substrate is extended along the second direction, and the second direction is intersected with the first direction, at least a part of the second power line is connected to at least a part of the first power line through a via hole.