Pixel Circuit Reset Compensation for Display Panel Luminance
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Solution Overview
Problem
LED display panels face poor uniformity in luminance due to drifting threshold voltages of driving transistors, leading to complex structures and high power consumption from multiple control signal lines and sources required for threshold voltage compensation.
Innovation Solution
A pixel circuit integrating a reset compensation circuit that resets and compensates the threshold voltage of driving transistors using a single reset control signal line, reducing the number of control signal lines and types needed, thus simplifying the structure and lowering power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control signal lines and sources are used for threshold voltage compensation, then luminance uniformity can be improved, but device complexity and power consumption increase
Solution Approach 1:
The patent merges the reset function and threshold voltage compensation function into a single reset compensation circuit. The reset compensation circuit performs both resetting the driving transistor and compensating for threshold voltage drift using the same control signal line, thereby reducing the number of control signal lines and sources while maintaining luminance uniformity through integrated dual-function operation
Solution Approach 2:
The reset control signal line is designed to serve multiple purposes: it controls both the reset operation and the threshold voltage compensation operation of the reset compensation circuit. This multi-functional design eliminates the need for separate control signal lines for reset and compensation, reducing device complexity while maintaining the ability to achieve luminance uniformity
2Reliability
If multiple control signal lines and sources are used for threshold voltage compensation, then luminance uniformity can be improved, but power consumption increases
Solution Approach 1:
The patent merges the reset function and threshold voltage compensation function into a single reset compensation circuit that operates under one control signal line. This integration reduces the number of active control signals and circuit components, thereby lowering overall power consumption while maintaining the luminance uniformity benefit of threshold voltage compensation
Solution Approach 2:
The reset control signal line is designed to serve multiple purposes: it controls both the reset operation and the threshold voltage compensation operation of the reset compensation circuit. This multi-functional design eliminates the need for separate control signal lines for reset and compensation, reducing device complexity while maintaining the ability to achieve luminance uniformity
Data Source
AI summary
The present disclosure provides a pixel circuit and a method for driving the same, a display panel and a display device. The pixel circuit includes: a reset compensation circuit, a data writing circuit, a light emitting control circuit, a driving transistor and a light emitting element, the reset compensation circuit is coupled to a gate, a first electrode and a second electrode of the driving transistor and a reset control signal line, and is configured to reset the gate of the driving transistor during a reset compensation stage and acquire a threshold voltage of the driving transistor under the control of a reset control signal provided by the reset control signal line.