Gate Driver Circuit Reducing Bezel Size via Dual-Output Shift Registers
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Solution Overview
Problem
The existing gate driver circuits in display panels require multiple shift registers to control light-emitting elements, leading to increased bezel size and complexity, which is inefficient and limits design flexibility.
Innovation Solution
A gate driver circuit design that includes cascaded shift registers with input, node control, and output units, allowing one shift register to output two control signals, thereby reducing the number of shift registers needed and minimizing the bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple shift registers are used to control light-emitting elements, then the control coverage is improved, but the bezel size increases
Solution Approach 1:
Each shift register is designed with dual output units (first output unit and second output unit) that can independently output different control signals. This allows a single shift register to control multiple scanning lines simultaneously, effectively doubling the control coverage without requiring additional shift registers, thereby reducing the bezel size while maintaining comprehensive control capability
Solution Approach 2:
The patent combines multiple control functions into a single shift register by integrating dual output units within one register structure. The first output unit controls a first scanning line while the second output unit controls a second scanning line, merging what would traditionally require separate registers into a unified component, thus reducing the overall gate driver circuit area and bezel size
2Adaptability or versatility
If multiple shift registers are used to control light-emitting elements, then the control capability is improved, but the device complexity increases
Solution Approach 1:
The shift register is designed with multi-functional output units that can independently generate different control signals (such as EMIT signals and ELVDD control signals) simultaneously. This multi-functionality allows a single register to perform what would traditionally require multiple separate circuits, thereby improving control capability while reducing overall device complexity
Solution Approach 2:
Multiple control functions are merged into a single shift register structure with dual output units. The first output unit and second output unit are integrated within the same register, sharing common control logic and timing mechanisms, which reduces the number of independent circuits needed and simplifies the overall device architecture while maintaining enhanced control capability
Data Source
AI summary
Provided are gate driver circuit, display panel, display device, and driving method thereof. The gate driver circuit includes cascaded shift registers. Each shift register includes input unit, node control unit, first output unit, and second output unit. first terminal, control terminal, and second terminal of the input unit respectively electrically connected to signal input terminal, first signal terminal, and first node. first terminal, second terminal, third terminal, fourth terminal, first control terminal, second control terminal and fifth terminal of the node control unit respectively electrically connected to the first node, the first signal terminal, first power supply voltage terminal, second power supply voltage terminal, the first node, second signal terminal, and second node. As such, one shift register outputs two control signals, the number of shift registers in the gate driver circuit can be reduced, and the bezel of the display panel and the display device can be reduced.