Display Panel Intersecting Power Lines for Voltage-Drop Compensation
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Solution Overview
Problem
In display panels, power signal transmission through power signal lines results in voltage drop due to resistance, leading to non-uniform power signals and display uniformity issues.
Innovation Solution
The implementation of first and second power signal lines with intersecting directions, where the second power signal lines provide compensation voltages through indirect connections via switch elements to counteract voltage drops in the first power signal lines, ensuring uniform power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power signals are transmitted through power signal lines to pixel circuits, then power supply is achieved, but voltage drop occurs due to resistance causing non-uniform power signals and display uniformity issues
Solution Approach 1:
The patent introduces a compensation voltage line as an intermediary element between the power signal line and the pixel circuit. This compensation voltage line carries a compensation signal that mediates the voltage drop effect, allowing the pixel circuit to receive both the original power signal and the compensating signal, thereby maintaining uniform power distribution across the display panel.
Solution Approach 2:
The patent implements a feedback mechanism where the compensation voltage line provides feedback information about the voltage drop to the pixel circuit. By monitoring the voltage conditions and providing compensating signals based on this feedback, the system dynamically adjusts the power delivery to maintain uniformity despite resistance-induced voltage drops in the power signal lines.
2Reliability
If compensation voltage lines are added to counteract voltage drops, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the compensation voltage line with the existing power signal line structure, allowing both the power signal and compensation signal to be transmitted through an integrated line system. This combining approach reduces the need for completely separate compensation circuits and minimizes the increase in device complexity while still achieving the uniformity improvement.
Solution Approach 2:
The compensation voltage line is designed to serve multiple functions: it carries compensation signals, interacts with the power signal line, and provides feedback to pixel circuits. This multi-functionality allows a single added element to address multiple aspects of the voltage drop problem, reducing the overall complexity compared to implementing separate dedicated circuits for each function.
Data Source
AI summary
A display region of a display panel includes first power signal lines and second power signal lines which are electrically connected, the first power signal lines extend in a first direction and are arranged in a second direction, and the second power signal lines extend in the second direction and are arranged in the first direction; where the first direction intersects the second direction. A non-display region of the display panel includes a first power bus line, and the first power signal lines are electrically connected to the first power bus line. The first power signal lines and the second power signal lines are electrically connected, and among two second power signal lines, a voltage in a second power signal line facing the first power bus line is different from a voltage in a second power signal line facing away from the first power bus line.