Array Substrate Second Transistor Pre-Charging High Resolution LCDs
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Solution Overview
Problem
The charging rate of liquid crystal displays (LCDs) decreases with increasing resolution and dimension, failing to meet high resolution and large dimension requirements, and is prone to erroneous charging processes.
Innovation Solution
Incorporating a second transistor within each pixel cell, with its control end connected to the succeeding scanning line, which extends the turn-on period of the first transistor, thereby lengthening the charging period of the pixel electrode and enhancing the charging rate while reducing the risk of erroneous charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution and dimension of LCDs are increased, then the display quality is improved, but the charging rate of the LCDs decreases
Solution Approach 1:
The patent introduces a pre-charging period before the normal charging period by connecting the control end of the second transistor to the succeeding scanning line. This preliminary action allows the pixel electrode to be pre-charged before the main charging process, effectively increasing the total charging rate without compromising display resolution.
2Measurement precision
If the resolution and dimension of LCDs are increased, then the display quality is improved, but the charging process becomes error-prone
Solution Approach 1:
By implementing a pre-charging period through the second transistor controlled by the succeeding scanning line, the patent ensures that the pixel electrode is properly prepared before the main charging process. This preliminary action reduces the risk of charging errors and improves the reliability of the charging process in high-resolution displays.
3Speed
If the scanning line is turned off early to enable the next scanning line, then the scanning speed is improved, but the charging period of the pixel electrode is shortened
Solution Approach 1:
The patent extends the charging period by implementing a pre-charging phase before the scanning line is turned off. The second transistor, controlled by the succeeding scanning line, maintains the charging current flow during the transition period, allowing the pixel electrode to complete its charging even as the current scanning line turns off to enable the next scanning line.
Solution Approach 2:
The patent ensures continuous charging action by using the succeeding scanning line to control the second transistor, which maintains the charging current flow during the transition between scanning lines. This continuity of useful action prevents interruption of the charging process, allowing the pixel electrode to be fully charged despite the rapid scanning required for high-speed display operation.
Data Source
AI summary
The present disclosure relates to an array substrate and a display panel. The array substrate includes a plurality of scanning lines, a plurality of data lines, and at least one low voltage line. The scanning lines and the data lines intersect with other to form a plurality of pixel cells. Each of the pixel cells includes a first transistor. At least one of the pixel cell further includes a second transistor having a first end, a second end, and a control end. The first end connects to the control end of the first transistor, and the control end connects to a succeeding scanning line. The succeeding scanning line is turned on after the scanning line at a current level is turned on, and the scanning line corresponds to the pixel cell where the second transistor is located.