Micro-LED Gate Driving Circuit for Stable GIA Operation
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Solution Overview
Problem
Existing micro-LED display apparatuses face challenges in stably driving gate drivers integrated within the gate in array (GIA) circuit, which is crucial for efficient operation of the display panel.
Innovation Solution
The implementation of a gate in array (GIA) circuit with specific transistor configurations and capacitors, including first and second gate drivers, transistors, and capacitors connected to QB and Q nodes, to provide synchronized scan signals with varying pulse widths, ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a gate driver is integrated within the GIA circuit in a micro-LED display apparatus, then the display apparatus achieves thinner profile and lower power consumption, but the gate driver becomes unstable in operation
Solution Approach 1:
The gate driver circuit is divided into multiple independent stages (first stage, second stage, third stage, etc.), each capable of autonomous operation. This segmentation allows each stage to be optimized independently for stability while maintaining the integrated GIA structure, resolving the contradiction between thinness and operational stability.
Solution Approach 2:
The patent employs dual-gate transistor configuration where the second gate can independently control the threshold voltage and operating parameters of the transistor. This parameter control mechanism enables stable operation of the integrated gate driver by adjusting electrical characteristics to compensate for process variations and ensure reliable performance in the thin-form-factor display apparatus.
2Productivity
If multiple gate drivers are used within the GIA circuit to provide scan signals, then the scanning capability and coverage are improved, but the device complexity increases
Solution Approach 1:
Multiple gate driver stages are merged into a single integrated GIA circuit block, sharing common transistors, capacitors, and wiring infrastructure. The first, second, and third gate drivers utilize shared components such as the same transistor types and capacitor structures, reducing overall device complexity while maintaining enhanced scan signal provision capability.
Solution Approach 2:
The gate driver stages are designed with universal, identical circuit topologies that can perform multiple functions. Each stage can drive different scan lines and serve different pixel rows, allowing the same circuit design to be replicated and reused throughout the display panel, thereby improving productivity without proportionally increasing complexity.
Data Source
AI summary
A micro-LED display apparatus presented herein is capable of efficiently using the output of a timing controller. Power consumption of the micro-LED display apparatus can be reduced by efficiently using the output of the timing controller.