LCD Drive Structure for 3D Flicker Elimination via Charge Sharing Control
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Solution Overview
Problem
Liquid crystal display (LCD) panels experience a flicker phenomenon during 3D display mode due to frame inversion driving, which is difficult to eliminate without increasing production costs, especially when trying to control voltage charging and sharing functions.
Innovation Solution
A drive structure for LCD panels that includes multiple gate lines, charge and share gate lines, and switch units at the gate driver input and output terminals, allowing for separate control of voltage charging and sharing functions using specific drive signal lines, enabling activation of voltage sharing in 2D mode and deactivation in 3D mode without additional gate ICs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate control of voltage charging and voltage sharing functions is implemented, then the flicker phenomenon under 3D display mode can be eliminated, but the gate IC channels are doubled requiring additional ICs which increases production costs
Solution Approach 1:
The patent combines the control of charge gate lines and share gate lines into a single gate IC by using one gate IC output to simultaneously control both types of gate lines through switch units. This merging approach eliminates the need for separate gate ICs for voltage charging and voltage sharing functions, thereby reducing production costs while maintaining the ability to eliminate flicker under 3D display mode.
Solution Approach 2:
The gate IC is designed with multi-functionality to perform both voltage charging control and voltage sharing control through its output signals. The switch units enable the gate IC output to universally control different gate line types (charge gate lines and share gate lines) based on display mode requirements, allowing a single gate IC to replace what would traditionally require two separate ICs.
2Reliability
If charge sharing function is used to eliminate color shift, then color accuracy is improved, but under 3D display mode with frame inversion driving the charge sharing function becomes invalid causing flicker phenomenon
Solution Approach 1:
The patent implements dynamic control of the charge sharing function based on display mode. Under 2D display mode, the charge sharing function is activated to eliminate color shift. Under 3D display mode with frame inversion driving, the charge sharing function is deactivated to prevent flicker phenomenon. This dynamic switching allows the system to adapt to different display requirements and eliminate harmful effects in specific modes.
Solution Approach 2:
The patent changes the operational parameters of the charge sharing function based on display mode. By controlling the switch units with different signal line configurations under different modes, the charge sharing function is enabled or disabled accordingly. This parameter change approach allows the system to maintain color accuracy under 2D mode while avoiding flicker under 3D mode.
Data Source
AI summary
Disclosed are a liquid crystal display panel, and a drive structure and a drive method thereof. The drive structure comprises a plurality of gate lines, a plurality of sets of charge and share gate lines, a plurality of switch units, a first drive signal line, a second drive signal line, a third drive signal line, a fourth drive signal line, and a low-voltage signal line. A plurality of switch units is used in conjunction with corresponding timing signals to achieve separate control of the functions of voltage charging and voltage sharing.