Display Device Grayscale Compensation for Head-Shaking Pattern
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Solution Overview
Problem
Liquid crystal display devices exhibit a 'head-shaking pattern' when driven by the time-domain viewing angle control algorithm due to high and low grayscale switching between frames and opposite polarities of data voltages, leading to display quality issues.
Innovation Solution
A display method and device that compensates grayscale data by determining changes in grayscale and voltage polarity between frames, using a preset compensation condition to adjust data voltages and improve display stability, specifically through a high and low grayscale compensation set and overdrive unit to correct grayscale data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-domain viewing angle control algorithm is used to drive the liquid crystal display device, then the viewing angle control is improved, but a head-shaking pattern appears in the display
Solution Approach 1:
The patent applies preliminary action by performing grayscale compensation in advance before displaying the current frame. The compensation value is calculated based on the grayscale data of the current frame and the previous frame, and this compensated value is then used to adjust the data voltage. This proactive compensation prevents the head-shaking pattern from occurring in the first place, rather than correcting it after it appears.
Solution Approach 2:
The patent implements feedback by using the grayscale data from the previous frame to influence the current frame's display. The compensation value is determined by comparing the current frame's grayscale data with the previous frame's grayscale data, creating a feedback loop that adjusts the display to maintain stability across frame transitions.
2Adaptability or versatility
If grayscale data switches between high and low gray levels between adjacent frames, then the viewing angle control is enhanced, but brightness inconsistency occurs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the grayscale data parameter based on the difference between the current frame and the previous frame. When a grayscale transition is detected, a compensation value is calculated and applied to modify the data voltage, thereby changing the parameter to maintain consistent brightness perception despite the high and low gray level switching.
Data Source
AI summary
The present disclosure provides a display device and a display method thereof. When a change of a grayscale data of a sub-pixel between a current frame and a previous frame, and a change of a polarity of a data voltage of the sub-pixel between the current frame and the previous frame satisfy a compensation condition, the grayscale data of the sub-pixel in the current frame is compensated.