LCD Driving Circuit Reduces 3D Cross-Talk via Segmented Scanning
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Solution Overview
Problem
The challenge in 3D shutter glass display technology is the occurrence of cross-talk phenomena due to the response speed of liquid crystals, which is exacerbated by high frame rates, leading to ghost images and increased charging demands on the liquid crystal panel, and existing solutions like black frame insertion or dual-gate activation require complex designs.
Innovation Solution
A driving device for liquid crystal display panels is introduced, comprising three control circuits to manage scanning lines, allowing for normal 2D display and reducing cross-talk in 3D mode through black frame insertion without adding new complex designs, by controlling the connection states between odd and even-numbered scanning lines using switching transistors and control signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If black frame insertion technology is adopted to reduce cross-talk, then cross-talk phenomena are reduced, but frame rate must be doubled which increases charging demands on the liquid crystal panel
Solution Approach 1:
The patent divides scanning lines into odd-numbered and even-numbered groups, with separate control circuits managing each group independently. This segmentation allows selective activation of scanning lines to reduce cross-talk while maintaining manageable frame rates by processing odd and even lines in separate cycles.
Solution Approach 2:
The patent implements dynamic control of scanning line connections through switching transistors that can connect or disconnect odd and even scanning lines based on display mode (2D or 3D). This dynamic reconfiguration allows the system to adapt the scanning pattern to reduce cross-talk during 3D display without permanently increasing frame rate requirements.
2Productivity
If dual-gates are turned on simultaneously to reduce resolution in scanning direction and raise charging time, then frame rate requirements are reduced, but new complex designs are required on PCB and gate IC
Solution Approach 1:
The patent designs control circuits that can operate in multiple modes: they function as standard scanning control circuits during 2D display, and as dual-gate control circuits during 3D display. This multi-functionality allows the same hardware to reduce charging time requirements without requiring separate dedicated circuits for different display modes.
Solution Approach 2:
The patent merges the control functions for odd and even scanning lines into a unified control structure where switching transistors can connect these lines together when needed. This merging allows the system to achieve dual-gate functionality without completely separate control paths, reducing overall design complexity.
3Object-affected harmful factors
If scanning switching technology or dynamic local dimming technology is used to reduce cross-talk, then cross-talk phenomena are reduced, but control circuit structure becomes complex and cost increases
Solution Approach 1:
The patent applies cross-talk reduction selectively by using switching transistors to connect only specific pairs of scanning lines (odd and even lines) when 3D mode is active. This localized approach to cross-talk reduction targets the specific problem areas without requiring complex global control mechanisms.
Solution Approach 2:
The patent introduces switching transistors as intermediary elements between odd and even scanning lines. These transistors act as mediators that can connect or disconnect the scanning lines based on display mode, providing a simple mechanism to reduce cross-talk without complex control circuitry.
Data Source
AI summary
The present disclosure discloses a driving device for liquid crystal display panel, a liquid crystal display panel, and a driving method thereof, said driving device comprising: a plurality of scanning lines, a first control circuit, a second control circuit, and a third control circuit. According to the present disclosure, three control circuits are added to the driving device of the liquid crystal display panel, whereby normal two dimensional display can be realized without additional cost being added therein. The black frame insertion technology for eliminating the cross-talk phenomena during three dimensional display can be used, i.e., the dual-gates, which are used for reducing the influence of high frame rate on the charging of the liquid crystal panel, can be turned on simultaneously.