Pixel Circuit Layout With Bypassing Scan Lines for Voltage Withstand
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Solution Overview
Problem
Existing pixel circuit configurations face challenges in securing voltage withstand capability while allowing for the arrangement of scan and data lines due to the narrow width of the pixel circuit in the short-axis direction, making it difficult to connect these lines to the driving switch.
Innovation Solution
A pixel circuit substrate design with active layer regions extending across adjacent pixel electrodes, featuring scan and data lines that bypass control lines and connect directly to the driving switches, ensuring sufficient voltage withstand capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel surface of the pixel electrode is made fine to achieve high-precision display, then the manufacturing precision and display quality are improved, but the channel length of the driving switch is shortened, resulting in decreased voltage withstand capability
Solution Approach 1:
The pixel circuit is divided into two separate pixel circuits, each occupying one pixel electrode. Each pixel circuit has its own driving switch with sufficient channel length to maintain voltage withstand capability, while the pixel electrodes remain fine for high-precision display. This segmentation allows the circuit width to be reduced without compromising switch performance.
2Reliability
If the pixel circuit width in the short-axis direction is reduced to maintain voltage withstand capability, then the driving switch channel length is preserved, but it becomes difficult to wire scan lines or data lines connected to the driving switch
Solution Approach 1:
The scan lines and data lines are routed in the long-axis direction of the pixel electrode rather than the short-axis direction. This dimensional change in wiring approach allows sufficient space for line connections even when the pixel circuit width in the short-axis direction is reduced, thereby maintaining both voltage withstand capability and line wiring feasibility.
Data Source
AI summary
A pixel circuit substrate includes: a plurality of pixel electrodes; a plurality of active layer regions extending across adjacent pixel electrodes and arranged in a direction intersecting an arrangement direction of the plurality of pixel electrodes; a plurality of driving switches respectively formed at the plurality of active layer regions; a plurality of control lines each of which is connected between each control terminal and a corresponding one of the plurality of pixel electrodes; a scan line arranged between the plurality of driving switches and the plurality of pixel electrodes and connected to a scan terminal; and a data line arranged between the plurality of driving switches and the plurality of pixel electrodes and connected to a data terminal, wherein the scan line bypasses the plurality of control lines and extends between the plurality of driving switches and the plurality of pixel electrodes.