TFT Array Structure with Interlaced Data Lines for LCD Charging
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Solution Overview
Problem
Conventional TFT arrays experience long charging durations due to the need to turn off transistors before charging can begin on adjacent scan lines, which prolongs the process of charging liquid crystal molecules in LCD panels.
Innovation Solution
The TFT array structure incorporates interlaced first and second data lines and control modules, where the second data line charges a capacitor in advance, allowing it to rapidly charge pixel units when the scan line is activated, thereby reducing the overall charging duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transistor is turned off before charging adjacent pixel units, then the pixel unit can be charged by the first data line, but the charging duration becomes long
Solution Approach 1:
The patent applies preliminary action by charging the control module's capacitor in advance through the second data line before the pixel unit needs to be charged. When the scan line is activated, the control module is already charged and ready to immediately charge the pixel unit through the second control transistor, eliminating the delay caused by turning off the transistor first.
Solution Approach 2:
The control module acts as an intermediary between the second data line and the pixel unit. It receives charge from the second data line through the first control transistor and transfers it to the pixel unit through the second control transistor, enabling seamless charging without requiring the transistor to be turned off first.
2Productivity
If the scan line is activated for charging, then the pixel unit can be charged, but adjacent pixel units cannot be charged simultaneously
Solution Approach 1:
The patent segments the charging function into two independent paths: the first data line charges the pixel unit directly when the scan line is activated, while the second data line charges the control module's capacitor in parallel. This segmentation allows both charging operations to occur simultaneously without interference.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining both data lines active simultaneously. The first data line continues to charge the pixel unit while the second data line continuously charges the control module's capacitor, maximizing the utilization of both data lines and eliminating idle time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces the charging time of pixel units by utilizing pre-charged capacitors to drive the charging process, improving the efficiency of the TFT array and LCD panel operation.
Implementation Method 1
the capacitor is coupled to the first control transistor and the second control transistor of the later control module... The charged later control module charges another pixel unit when the scan line is inactivated
Data Source
AI summary
A thin-film transistor (TFT) array structure and a liquid crystal display (LCD) panel thereof are described. The TFT array structure includes a plurality of scan lines, a plurality of first data lines, a plurality of second data lines, a plurality of pixel units and a plurality of control module. Each of the control modules is coupled among the scan line, one second data line and one pixel unit. The second data line charges the later control module when the scan line is selected to be activated for charging the pixel unit by the first data line. The charged later control module charges another pixel unit when the scan line is inactivated and another scan line is selected to be activated for charging another pixel unit by the first data line. The TFT array structure can reduce the charging duration of the pixels.