Display Device Threshold Voltage Compensation Driving Method
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Solution Overview
Problem
As display panels increase in size, the need for high-speed data writing leads to insufficient compensation of threshold voltage in driving transistors, causing image blur due to voltage variation, especially in low-gray images.
Innovation Solution
A display device and driving method that include a scan driver and data driver configuration to apply specific scan and data signals to pixels, ensuring sufficient time for threshold voltage compensation of driving transistors, using a combination of scan signals and data signals to reset gate voltages and store compensated data signals in storage capacitors, allowing for concurrent light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data writing speed is increased to meet high-speed driving requirements, then productivity is improved, but threshold voltage compensation becomes insufficient causing image blur
Solution Approach 1:
The patent applies preliminary action by performing threshold voltage compensation before data writing in a dedicated compensation period. The driving transistor's threshold voltage is compensated in advance using a compensation transistor and storage capacitor, ensuring accurate voltage levels are established before high-speed data writing begins, thus preventing image blur while maintaining high productivity
Solution Approach 2:
The patent segments the driving period into distinct phases: a compensation period for threshold voltage compensation and a data writing period for high-speed data input. This temporal segmentation allows sufficient time for accurate threshold voltage compensation without compromising overall data writing speed, resolving the contradiction between compensation accuracy and productivity
2Productivity
If data writing time is shortened for high-speed driving, then productivity is improved, but image quality deteriorates due to insufficient threshold voltage compensation
Solution Approach 1:
Threshold voltage compensation is performed in advance during a dedicated compensation period before the data writing period. This preliminary action ensures that the driving transistor has accurate threshold voltage compensation stored in the storage capacitor, guaranteeing image quality even when data writing time is shortened for high-speed driving
Solution Approach 2:
The patent implements periodic action by alternating between compensation periods and data writing periods in a structured sequence. During compensation periods, threshold voltage is compensated; during data writing periods, high-speed data is written. This periodic structure ensures both reliable threshold voltage compensation and high data writing speed, maintaining image quality while achieving high productivity
Data Source
AI summary
A display device is provided that can provide sufficient time for threshold voltage compensation of a driving transistor of each pixel during high-speed driving of the display device, and a method for driving the same. A data writing and threshold voltage compensation step of pixels at odd and even-numbered lines are concurrently performed during an extended time period so that the time available for threshold voltage compensation of the driving transistors can be increased.