Display Driver Polarity Inversion Signal Phase Control
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Solution Overview
Problem
Existing display devices experience visual quality degradation due to horizontal dark stripes caused by line inversion during data transition, especially when multiple lines of polarity reversal occur.
Innovation Solution
The proposed solution involves a driver apparatus that includes a timing controller and a data driver circuit, which generate and output multiple polarity inversion signals with different phases to drive the display panel, thereby reducing streaking and improving visual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If two line inversion is used to drive the display panel, then the data driver circuit power consumption is reduced, but horizontal dark stripes appear on the displayed image degrading visual quality
Solution Approach 1:
The patent divides the single polarity inversion signal into multiple polarity inversion signals (first polarity inversion signal and second polarity inversion signal) that are applied to different pixel columns. This segmentation allows the display panel to maintain the power-saving benefits of line inversion while distributing the polarity reversal across multiple signals, thereby reducing the visibility of horizontal dark stripes and improving overall visual quality.
2Reliability
If multiple lines of polarity reversal are used, then the DC stress on transistors is reduced through data transition, but the spatial period of the displayed image increases degrading visual quality
Solution Approach 1:
The patent applies different polarity inversion patterns to different pixel columns through multiple polarity inversion signals. By locally adjusting the polarity inversion characteristics in different column regions, the solution maintains effective DC stress relief for transistor reliability while controlling the spatial period in each local region to prevent excessive periodicity that would degrade visual quality.
Data Source
AI summary
The disclosure provides an electrical apparatus. The electrical apparatus includes a timing controller, a data driver circuit, and a display panel. The timing controller is configured to receive at least one data polarity configuration signal. The timing controller generates and outputs a plurality of polarity inversion signals according to the data polarity configuration signal. The phases of the polarity inversion signals are different. The data driver circuit is coupled to the timing controller. The data driver circuit is configured to receive the polarity inversion signals. The display panel is coupled to the data driver circuit. The display panel is configured to display images. The data driver circuit drives the display panel to display the images according to the polarity inversion signals.