Dual-Gate Display Panel Pre-Charging for Luminance Uniformity
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Solution Overview
Problem
The dual-gate TFT-LCD design often results in the appearance of vertical bright lines and vertical dark lines due to insufficient charging rates, leading to luminance differences between pixels in low gray scale screens.
Innovation Solution
A display panel design where each row of pixels includes two columns connected to the same data line, with the second column pre-charged when the corresponding scanning line is turned on, and the first column pre-charged during the opening time of the next scanning line, to equalize the charging voltage and reduce luminance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a dual-gate design is used to reduce the number of data lines, then device complexity is reduced, but luminance uniformity deteriorates due to vertical bright and dark lines
Solution Approach 1:
The patent applies preliminary action by pre-charging the second column of pixels through the (2n+4)th scanning line before the main charging phase. This advance charging ensures that pixels in the second column receive sufficient charge voltage before display, preventing the luminance deficiency that causes vertical dark lines while maintaining the dual-gate design's reduced data line complexity
2Loss of time
If pixels are charged only during their designated scanning line opening time, then charging time is sufficient for each pixel, but overall productivity decreases due to missed charging opportunities
Solution Approach 1:
The patent enables productivity improvement by performing preliminary charging of the second column pixels during the opening time of the (2n+4)th scanning line, which occurs before these pixels need to be fully charged for display. This utilizes otherwise wasted time periods to advance the charging process, allowing the main charging phase to complete more efficiently without extending overall display timing
Solution Approach 2:
The patent achieves continuous useful action by overlapping the pre-charging operation with the opening time period of the (2n+4)th scanning line. Instead of charging pixels in discrete sequential steps, the system continuously utilizes available time windows including scanning line opening periods to perform charging operations, maximizing the utilization of time resources across the entire pixel array
Data Source
AI summary
The present disclosure provides a display panel, a driving method for a display panel, and a display device. The driving method for the display panel includes a first column of pixels and a second column of pixels. When charging the second column of pixels corresponding to a 2nth row of scanning lines, the second column of pixels corresponding to a (2n+4)th row of scanning lines is pre-charged.