Display Over-Driver Block Averaging Response Speed
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Solution Overview
Problem
Display devices experience slow response speeds, leading to afterimages and motion blur when displaying fast-changing content due to slow pixel luminance switching, which diminishes image quality.
Innovation Solution
Implementing a display device with an over-driver that performs block averaging on previous frame data, generates over-driving frame data by comparing current and previous frame data using an over-driving lookup table, and applies over-driving based on block size and bit conversion to improve response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If over-driving is applied to improve response speed, then response speed is improved, but memory capacity requirements increase
Solution Approach 1:
The patent divides the previous frame data into multiple blocks and performs block averaging on each block separately. This segmentation allows the system to process and store only representative average values for each block rather than complete frame data, significantly reducing memory capacity requirements while maintaining the over-driving functionality for response speed improvement.
Solution Approach 2:
The patent creates a simplified copy of previous frame data through block averaging, where each block is represented by its average grayscale value. This copied representation consumes less memory space but is sufficient for the over-driver to compare with current frame data and determine whether over-driving should be applied, thus resolving the memory capacity issue.
2Speed
If over-driving is applied to all frames, then response speed is improved, but image quality deteriorates due to unnecessary over-driving on still images
Solution Approach 1:
The patent implements a comparison mechanism where the over-driver evaluates the difference between block-averaged previous frame data and current frame data before applying over-driving. This feedback loop allows the system to intelligently determine whether over-driving is necessary based on actual frame changes, preventing unnecessary over-driving on still images and thereby maintaining image quality while improving response speed when needed.
Data Source
AI summary
A display device includes: a memory configured to store an over-driving lookup table and previous frame block data generated by block averaging previous frame data; an over-driver configured to obtain current frame data from input image data and to generate over-driving frame data for the current frame data by comparing the previous frame block data and the current frame data with reference to the over-driving lookup table; a data driver configured to generate an over-driven data signal based on the over-driving frame data; and a plurality of pixels configured to display an image based on the over-driven data signal, wherein the over-driver is configured to perform an over-driving based on a size of a block divided for the block averaging.