Overdrive Signal Generation for LCD Response Time Compensation
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Solution Overview
Problem
Liquid Crystal Display (LCD) devices suffer from image blurriness due to significant time response of LC elements, which is not effectively addressed by existing Response Time Compensation methods that require large memory for storing sub-pixel values.
Innovation Solution
A method that estimates sub-pixel values in a new frame based on shifted image elements from the previous frame, using a location shift value and edge detection to generate an overdrive signal, reducing memory requirements by using motion vector information and compression techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Response Time Compensation (RTC) method is used to reduce image blurriness, then image clarity is improved, but memory size increases significantly
Solution Approach 1:
The patent segments the full image data into only the essential edge information that defines image boundaries and transitions. Instead of storing complete sub-pixel values for all pixels, the system identifies and stores only edge sub-pixel values, which are the critical elements needed for motion compensation. This segmentation reduces memory requirements while preserving the ability to generate accurate overdrive signals for maintaining image clarity during motion sequences.
Solution Approach 2:
The patent extracts only the necessary edge information from complete frame data. By using edge detection algorithms, the system isolates and stores only the edge sub-pixel values that are essential for motion compensation, discarding redundant non-edge pixel data. This extraction process significantly reduces memory size while maintaining the effectiveness of Response Time Compensation for improving image clarity.
2Quantity of substance
If edge detection and motion vector information are used to estimate sub-pixel values, then memory usage is reduced, but processing complexity increases
Solution Approach 1:
The patent performs preliminary edge detection and motion vector calculation on the current frame before displaying it. By pre-processing the frame data to identify edges and calculate motion vectors in advance, the system prepares the necessary information for Response Time Compensation during the vertical blanking interval or processing period. This preliminary action ensures that when the frame is displayed, the overdrive signals can be generated quickly using the pre-computed edge and motion information, reducing real-time processing complexity while maintaining low memory usage.
Data Source
AI summary
Embodiments of the present invention provide an apparatus, system, and method of reproducing a sequence of at least first and second color image frames by controllably activating an array of liquid crystal elements, the array including at least a first liquid crystal element to reproduce first and second sub-pixel values in the first and second frames, respectively. Some demonstrative embodiments may include estimating the first sub-pixel value based on a third sub-pixel value to be reproduced in the second frame by a second liquid crystal element of the array which is shifted in relation to the first liquid crystal element by a location shift value associated with the first liquid crystal element; and generating an overdrive signal for activating the first liquid crystal element based on a combination of the first and second sub-pixel values. Other embodiments are described and claimed.