Display Panel Repair Driver Circuit for Pixel Uniformity
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Solution Overview
Problem
Conventional display panels face issues with poor circuit uniformity and uneven drive current due to problems in the driver circuit, leading to image uniformity errors.
Innovation Solution
A display panel and device incorporating a display driver circuit, a repair driver circuit, repair switch circuits, and a sensing circuit, where the repair driver circuit provides compensation signals to sub-pixel driver circuits through repair switch circuits when needed, allowing for efficient auto-repair of abnormal pixel points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional driver circuit is used to drive sub-pixels, then the display can operate with a simple structure, but the drive current becomes uneven and circuit uniformity deteriorates due to process conditions and material structure variations
Solution Approach 1:
The driver circuit is segmented into normal driver circuits for regular operation and repair driver circuits for compensation. Each driver circuit is independently controllable through repair switch circuits, allowing selective activation of repair functions for specific sub-pixel groups without affecting the entire display system.
Solution Approach 2:
The invention changes the drive current parameters by introducing repair driver circuits that can adjust and compensate for uneven current distribution. The repair driver circuits modify the electrical parameters (current magnitude and uniformity) to correct deviations caused by process variations and material structure differences.
2Reliability
If repair driver circuits and repair switch circuits are added to compensate for driver circuit errors, then image uniformity improves, but device complexity increases
Solution Approach 1:
The repair driver circuits are designed to serve multiple functions: they can compensate for various types of driver circuit errors, work with different sub-pixel groups, and be integrated into existing display architectures. This multi-functionality justifies the added complexity by providing versatile error correction capabilities.
Solution Approach 2:
Repair switch circuits act as intermediaries between the normal driver circuits and repair driver circuits. These switches enable selective connection and disconnection of repair functions, allowing the system to activate compensation only when and where needed, thereby managing complexity through controlled intervention rather than continuous operation.
3Manufacturing precision
If repair switch circuits are used to connect repair driver circuit output to sub-pixel driver circuits, then compensation accuracy improves, but the number of circuit components and connections increases
Solution Approach 1:
The repair switch circuits provide dynamic connectivity, allowing the system to adaptively connect repair driver circuit outputs to specific sub-pixel driver circuits based on detected errors. This dynamic switching capability enables precise targeting of compensation to only those areas needing correction, improving accuracy while managing component complexity through selective activation.
Data Source
AI summary
The present invention provides a display panel and a display device. The display panel adds a repair driver circuit, repair switch circuits and a sensing circuit into the circuit of the display panel. When sub-pixel driver circuits of the display panel need compensation, repair switch circuits switch on, a repair driver circuit outputs a corresponding drive signal to sub-pixels to be compensated such that highly efficient and fast auto repair to abnormal pixel points is achieved to mitigate the issue of errors of the driver circuit in the conventional display.