Display Panel Bilateral Gate Driving for Scan Waveform Stability
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Solution Overview
Problem
Large-size liquid crystal display panels face challenges with unilateral gate drive output, leading to waveform deterioration and inefficient switching actions due to impedance losses and long scan lines.
Innovation Solution
A display panel design with bilateral output at the output ends of a gate drive circuit, where multiple first gate drive circuits are arranged between adjacent display screens to drive both screens simultaneously, reducing the distance and resistance of scan lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a unilateral gate drive circuit is used to drive a large-size display panel with long scan lines, then the device complexity is reduced, but the scan waveform deteriorates and switching action cannot be well accomplished due to impedance losses
Solution Approach 1:
The gate drive circuit is divided into multiple independent gate drive circuits, each responsible for driving a specific display screen. This segmentation allows each circuit to drive a shorter scan line distance, reducing impedance losses and waveform deterioration while maintaining overall system functionality.
Solution Approach 2:
The patent transitions from a single-sided unilateral drive configuration to a bilateral drive configuration where gate drive circuits are positioned at both ends of the display panel. This dimensional change in drive architecture enables simultaneous driving from multiple directions, reducing the effective drive distance and improving waveform quality.
2Area of stationary object
If the scan line length is increased to cover large-size display panels, then the display area is expanded, but the resistance and impedance losses increase causing waveform distortion
Solution Approach 1:
The display panel is divided into multiple smaller display screens, each driven by its own gate drive circuit. This segmentation reduces the scan line length for each driven segment, thereby reducing resistance and impedance losses while maintaining the overall large display area through concatenation of multiple screens.
Solution Approach 2:
Multiple gate drive circuits act as intermediaries positioned at different locations across the display panel. These intermediaries reduce the distance signals must travel by providing local drive points, thereby reducing signal attenuation and energy loss across the large display area.
3Device complexity
If a single gate drive circuit drives multiple display screens, then the device complexity is reduced, but the load on the gate drive circuit becomes excessive causing waveform distortion
Solution Approach 1:
The gate drive functionality is segmented across multiple independent circuits, each handling a portion of the total display screens. This distribution reduces the load on each individual circuit, preventing waveform distortion while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
Each gate drive circuit is designed to drive two adjacent display screens simultaneously, providing multi-functionality. This universal capability allows the system to achieve better load distribution with fewer circuits than if each screen required a dedicated drive circuit.
Data Source
AI summary
Disclosed are a display panel, a driving method, and a display device. The display panel includes a first display screen that includes a first scan line; a second display screen that includes a second scan line; and a first gate drive circuit coupled to the first scan line and the second scan line, where the first scan line and the second scan line are not coupled to each other.