Liquid Crystal Display Panel Pulse Control Circuit Flicker Reduction
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Solution Overview
Problem
Liquid crystal display panels experience picture flicker due to parasitic capacitance and resistance (RC) delays in scanning lines, which existing technologies have not adequately addressed.
Innovation Solution
A gate pulse control circuit that includes transistors to receive and modify pulse signals, reducing the duration of the pulse signals to minimize RC delays and thereby reduce picture flicker, by using control signals to manage the operation of transistors and adjust the timing of pulse signals output to scanning lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse signals are transmitted through scanning lines to control thin film transistors, then the gate driver can output gate driving signals to control the display, but parasitic capacitance and resistance cause RC delay that leads to picture flicker
Solution Approach 1:
The patent applies dynamics by making the pulse signal width variable rather than fixed. The gate driver circuit dynamically adjusts the pulse signal width based on the RC delay characteristics of different scanning lines. By changing the pulse width adaptively, the system compensates for the time loss caused by parasitic capacitance and resistance, ensuring reliable transistor control without picture flicker.
Solution Approach 2:
The patent changes the parameter of pulse signal width to resolve the contradiction. By adjusting the pulse width parameter in response to RC delay effects, the system maintains effective transistor control despite the time loss in scanning lines. This parameter adjustment ensures that the gate driving signal remains sufficient to control the thin film transistors reliably.
2Reliability
If the pulse signal duration is reduced to minimize RC delay effects, then picture flicker is reduced, but the control effectiveness may be compromised
Solution Approach 1:
The patent applies local quality by providing different pulse signal widths for different scanning lines or different time periods. Instead of using a uniform pulse width, the system tailors the pulse duration to the specific RC characteristics of each scanning line or operational condition. This localized adjustment maintains transistor control effectiveness while minimizing picture flicker in each specific context.
Solution Approach 2:
The system dynamically adjusts pulse signal characteristics based on real-time or pre-characterized RC delay measurements. By making the pulse width adaptive rather than static, the system ensures that control effectiveness is maintained even when pulse duration is reduced to minimize flicker. The dynamic adjustment allows the system to optimize between these two competing requirements.
Data Source
AI summary
A flicker-reduced liquid crystal display panel diminishing resistance-capacitance phenomena includes a plurality of parallel scanning lines and a plurality of parallel data lines, all lines intersecting with each other at the crosses. The liquid crystal display panel further includes a pulse control circuit and a gate driver. The pulse control circuit receives a pulse signal and reduces the time of the pulse signal under control of a control signal, the control signal controlling the start and finish of the time reduction. A reduced pulse signal is output. The gate driver receives the pulse signal which is output and issues scanning signals to the plurality of scanning lines.