Display Panel Bias Signal Line Segmentation for Coupling Interference
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Solution Overview
Problem
Display panels face challenges in maintaining image quality due to susceptibility of bias signal lines to coupling interference, especially during low-frequency driving, which affects the consistency and brightness of displayed images.
Innovation Solution
The implementation of a display panel with a pixel driving circuit based on an 8T1C structure, where bias signal lines are arranged in a specific intersection pattern to reduce overall resistance and increase signal transmission stability, thereby minimizing coupling interference and improving image display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional 7T1C pixel driving circuit is used, then the device complexity is lower, but the image display quality is insufficient due to inability to provide stable bias voltage during low-frequency driving
Solution Approach 1:
The bias signal line is segmented into multiple sublines (first bias signal subline and second bias signal subline) that extend in different directions. This segmentation allows the bias voltage to be transmitted through multiple parallel paths, reducing the impact of coupling interference from other signal lines while maintaining stable bias voltage supply to the drive transistor during low-frequency driving operations.
2Reliability
If bias signal lines are arranged in a conventional single-direction manner, then the layout is simpler, but the signal transmission stability is reduced due to increased coupling interference
Solution Approach 1:
The bias signal lines are arranged in two different directions (first direction and second direction) instead of a single direction. This dimensional change creates spatial separation between bias signal lines and other signal lines, reducing electromagnetic coupling interference while maintaining signal transmission stability. The intersection of these directional lines provides multiple transmission paths for bias voltage.
3Use of energy by moving object
If low-frequency driving is implemented to reduce energy consumption, then the energy efficiency is improved, but the image display quality deteriorates due to increased coupling interference and bias voltage instability
Solution Approach 1:
The bias signal line is divided into multiple sublines extending in different directions, creating parallel transmission paths. This segmentation reduces coupling interference from other signal lines during low-frequency driving, maintaining stable bias voltage supply to the drive transistor and ensuring consistent image display quality while energy consumption is reduced.
Solution Approach 2:
By arranging bias signal lines in multiple directions rather than a single direction, the patent creates spatial separation that reduces electromagnetic coupling interference. This dimensional arrangement maintains bias voltage stability during low-frequency driving operations, preventing image quality deterioration while achieving energy savings.
Data Source
AI summary
Provided are a display panel and a display device in the field of display technology. The display panel includes pixel driving circuits and signal lines; where a pixel driving circuit includes a drive transistor and a bias transistor, and the signal lines include bias signal lines; the drive transistor includes a gate, a first electrode and a second electrode; the bias transistor is electrically connected between a bias signal line and at least one of the first electrode or the second electrode of the drive transistor; and the bias signal lines include first bias signal sublines extending along a first direction and arranged along a second direction and second bias signal sublines extending along the second direction and arranged along the first direction, where the first direction intersects the second direction, and the first bias signal sublines and the second bias signal sublines are electrically connected.