Alternating Charging and Discharging Scanning Lines for LCD Panel
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Solution Overview
Problem
High-fineness LCD devices face insufficient charging time for gates, which limits their ability to operate at high frame rates, degrading user experience.
Innovation Solution
The LCD panel design includes alternating and parallel charging and discharging scanning lines, with each pixel unit connected to both, allowing simultaneous scanning of adjacent lines within the same time frame, extending charging time and enabling high frame rate operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of scanning lines is increased to achieve high fineness, then the display resolution is improved, but the charging time for each gate becomes insufficient
Solution Approach 1:
The scanning lines are segmented into two independent groups: charging scanning lines and discharging scanning lines. Each group operates independently with its own timing, allowing the charging process to be separated from the display refresh process. This segmentation enables sufficient charging time for each gate while maintaining high display resolution through the increased total number of scanning lines.
2Productivity
If the frame rate is increased to improve user experience, then the display responsiveness is improved, but the charging time for gates becomes even more insufficient
Solution Approach 1:
The charging of pixel electrodes is performed in advance during a dedicated charging period before the display refresh. The charging scanning lines operate independently to complete the charging process preliminarily, ensuring that gates are fully charged before the high frame rate display sequence begins. This preliminary action resolves the conflict between high frame rate requirements and sufficient charging time.
3Duration of action of moving object
If the number of scanning operations is reduced to extend charging time, then the charging time is improved, but the scanning efficiency decreases
Solution Approach 1:
While charging scanning lines are performing the charging function, discharging scanning lines simultaneously perform the discharging function for other pixel rows. This continuous parallel operation ensures that no scanning resource is idle - the charging process continues uninterrupted while discharging occurs in parallel, maintaining high scanning efficiency while providing extended charging time through the dedicated charging period.
Data Source
AI summary
A liquid crystal display (LCD) device and an LCD panel are disclosed. The LCD panel comprises charging scanning lines, discharging scanning lines, first data lines, second data lines and pixel units. The charging scanning lines and the discharging scanning lines are arranged alternately and parallel with each other in a first direction. The first data lines and the second data lines are arranged parallel with each other in a second direction and insulatedly intersect the charging scanning lines and the discharging scanning lines. Each pixel unit comprises a charging TFT, a discharging TFT and a pixel electrode. When two adjacent charging scanning lines are being scanned in the LCD panel, two adjacent discharging scanning lines located in other rows different from those of the two adjacent charging scanning lines being scanned are scanned within a same scanning time frame. The LCD panel can extend the charging time of gates.