Display Panel Data Driving Unit for Flicker and Crosstalk Compensation
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Solution Overview
Problem
Liquid crystal display panels experience issues with flicker and crosstalk when viewed from angles other than the front due to color deviation and high brightness, particularly in four-color sub-pixel configurations.
Innovation Solution
A display panel with a data driving unit that provides specific sequences of polarities and complementary high/low levels for color shift compensation across output terminals, ensuring that each pixel unit receives alternating complementary levels to maintain original brightness while reducing flicker and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a liquid crystal display panel uses four-color sub-pixels with conventional driving methods, then color display capability is improved, but flicker and crosstalk occur when viewed from angles other than the front
Solution Approach 1:
The patent divides the gray scale value of one sub-pixel into two different gray scale values to be displayed by two sub-pixels. This segmentation approach allows the display panel to maintain color display capability while reducing flicker and crosstalk effects when viewed from angled positions.
Solution Approach 2:
The patent implements periodic polarity inversion of data signals provided by the data driving unit. By alternating the polarity of data signals in a periodic manner, the display panel compensates for color shift and reduces flicker caused by liquid crystal rotation at different viewing angles.
2Ease of operation
If data signals with single polarity are provided to pixel units, then driving simplicity is maintained, but color shift and brightness deviation occur at angled viewing positions
Solution Approach 1:
The data driving unit periodically inverts the polarity of data signals provided to pixel units. This periodic polarity inversion compensates for color shift and brightness deviation that occur when the display is viewed from angles other than the front, while maintaining relatively simple driving operations.
Solution Approach 2:
The patent changes the polarity parameter of data signals in a periodic manner. By inverting the polarity of data signals, the display panel compensates for viewing angle-dependent color shift and brightness deviation without significantly complicating the driving system.
3Adaptability or versatility
If gray scale values are split into two different values for color compensation, then viewing angle performance is improved, but flicker is induced due to alternating brightness levels
Solution Approach 1:
The patent divides the gray scale value into two different gray scale values displayed by two sub-pixels with different polarities. This segmentation improves viewing angle performance by compensating for color shift while the alternating pattern reduces flicker perception.
Solution Approach 2:
The patent converts the potential harm of alternating brightness levels into a benefit by using the alternating polarity pattern to compensate for color shift at different viewing angles. The flicker-inducing alternation is transformed into a useful mechanism for viewing angle compensation.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a data driving unit provided a specific sequence of polarities and complementary high/low level for color shift compensation from a 1st terminal to a 16th terminal in each cycle unit to solve an issue of liquid crystal panel flicker, crosstalk, etc.