Liquid Crystal Display RGB Over-Driving Compensation
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Solution Overview
Problem
Conventional LCDs face challenges in compensating for response time differences among RGB data, leading to motion blur and color distortion during video display due to their long response times and the inability to equalize response times across red, green, and blue sub-pixels.
Innovation Solution
The implementation of a liquid crystal display with separate over-driving (OD) compensation units for red, green, and blue data, each operating at distinct OD rates to synchronize and equalize their response times, thereby improving moving image display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a single over-driving compensation method is used for all RGB data, then the response time can be increased to reduce motion blur, but the response time differences among RGB sub-pixels cannot be equalized, causing color distortion
Solution Approach 1:
The patent divides the single over-driving compensation method into separate compensation methods for red, green, and blue sub-pixels. Each color channel has its own over-driving compensation unit that independently adjusts the data voltage, allowing tailored response time optimization for each color while equalizing their response characteristics.
Solution Approach 2:
The patent applies different over-driving compensation rates to different color channels based on their specific response time characteristics. By determining individual over-driving compensation rates for R, G, and B data, the system optimizes the response time for each color channel locally, ensuring they all reach the target luminance at the same moment.
2Speed
If the data voltage is increased to reduce response time, then motion blur is reduced, but color distortion occurs due to unequal response times among RGB data
Solution Approach 1:
The patent dynamically adjusts the data voltage for each color channel based on its specific response time characteristics and the current display conditions. The over-driving compensation units independently control the voltage applied to R, G, and B sub-pixels, allowing the system to optimize response speed for each channel while maintaining color accuracy through coordinated voltage adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces motion blur and color distortion by ensuring that red, green, and blue data have similar response times, enhancing the overall picture quality of moving images on LCDs.
Implementation Method 1
VF represents Freederick transition voltage at which liquid crystal molecules start a tilting motion
Implementation Method 2
liquid crystal is restored to the original position according to elastic recovery of the liquid crystal after the voltage applied to the liquid crystal is off
Data Source
AI summary
A liquid crystal display including a first over-driving (OD) compensation unit compensating R data at a first OD rate; a second OD compensation unit compensating G data at a second OD rate; and a third OD compensation unit compensating B data at a third OD rate, where the second OD rate is higher than the first OD rate and the third OD rate.