GOA Dummy Circuit Loading via Pixel Electrodes
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Solution Overview
Problem
In Gate-Driver-On-Array (GOA) technology, the design of dummy GOA circuits for resetting and loading in display substrates faces challenges due to cascading characteristics and space constraints, particularly in narrow bezel products, leading to signal delay issues and increased space requirements for dummy loading, which are not effectively addressed by existing technologies.
Innovation Solution
The integration of a display substrate with a GOA circuit area including dummy GOA circuits connected to dummy pixel electrodes, where the pixel electrodes of adjacent dummy pixels are connected in series or parallel through connection lines to adjust resistance and capacitance values, ensuring the loading of dummy GOA circuits matches that of the gate line, and an optional dummy loading area with an electrode line between the dummy GOA circuit output and pixel electrode to optimize loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy GOA circuits are designed with traditional dummy loading, then the loading of dummy GOA circuits can be provided, but it increases space requirements and causes signal delay issues
Solution Approach 1:
The patent merges the dummy loading function with the dummy pixel electrode by connecting the output terminal of the dummy GOA circuit to the dummy pixel electrode. This integration eliminates the need for separate dummy loading circuits, reducing space requirements while maintaining the necessary loading characteristics for signal delay consistency.
Solution Approach 2:
The dummy pixel electrode serves multiple functions: it acts as both the display element and the dummy loading for the dummy GOA circuit. This multi-functionality allows the same structure to provide both display functionality (when activated) and loading functionality (when connected to dummy GOA output), thereby reducing the need for dedicated dummy loading space.
2Stability of the object's composition
If dummy GOA circuits are designed for resetting, then cascading characteristics can be improved, but it increases device complexity
Solution Approach 1:
The patent applies homogeneity by making the dummy GOA circuit have the same structure and loading characteristics as the normal GOA circuits. The dummy GOA circuit is designed with identical TFT configurations, gate lines, and loading mechanisms, ensuring uniform cascading characteristics across all GOA circuits without introducing structural complexity.
3Adaptability or versatility
If narrow bezel design is implemented, then product competitiveness is improved, but space for dummy loading is reduced
Solution Approach 1:
The patent merges the dummy loading function with the dummy pixel electrode structure, allowing the dummy loading to be provided within the pixel area itself rather than requiring additional space in the bezel region. This integration enables narrow bezel design while maintaining necessary dummy loading functionality.
Data Source
AI summary
A display substrate includes an active area; and a gate-driver-on-array (GOA) circuit area, wherein the active area includes a display pixel area and a dummy pixel area located in the periphery of the display pixel area, and wherein the GOA circuit area includes at least one dummy GOA circuit having an output terminal connected to a pixel electrode of at least one dummy pixel.