Pixel Response Correction Using Segmented Look-Up Tables
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Solution Overview
Problem
Electronic displays face issues with varying light emission responses to analog electrical signals, leading to perceivable visual artifacts and inefficiencies in data storage and communication due to the need for multiple pixel response correction mappings.
Innovation Solution
Implementing pixel response correction using multiple look-up-tables, where a most-significant-bits (MSB) look-up-table and a least-significant-bits (LSB) look-up-table are used to convert different portions of input image data, allowing for shared storage and reduced communication bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple pixel response correction mappings are stored to account for different operational parameters, then pixel response correction accuracy is improved, but data storage requirements increase
Solution Approach 1:
The patent segments the pixel response correction mapping into multiple look-up tables (LUTs), where each LUT stores correction data for a specific operational parameter range. This segmentation allows the system to store correction mappings in a compact format by dividing the full correction space into manageable segments, reducing overall storage requirements while maintaining comprehensive correction coverage across different operational conditions
Solution Approach 2:
The system dynamically selects and switches between different look-up tables based on current operational parameters such as temperature, humidity, and display duration. This dynamic adaptation allows the system to use only the relevant correction mapping for current conditions, reducing the amount of data that needs to be stored and transmitted while maintaining high correction accuracy across varying operational environments
2Measurement precision
If multiple pixel response correction mappings are communicated from external storage, then pixel response correction accuracy is improved, but data communication bandwidth and power consumption increase
Solution Approach 1:
The system implements dynamic selection of look-up tables based on real-time operational parameters, allowing the display controller to retrieve only the specific correction mapping needed for current conditions. This dynamic approach minimizes data communication bandwidth requirements and reduces power consumption compared to transferring multiple complete correction mappings, while still maintaining high correction accuracy across varying operational environments
Solution Approach 2:
The patent implements local storage of frequently used look-up tables in the display controller memory, reducing the need for repeated communications with external storage. This local caching strategy ensures that commonly accessed correction mappings are readily available without requiring additional communication bandwidth or power, while less frequently used mappings remain in external storage for on-demand retrieval
Data Source
AI summary
Systems and methods for improving displayed image quality of an electronic display including a display pixel and a display driver are provided. A display pipeline receives input image data that indicates target luminance of the display pixel when displaying an image frame on the electronic display; determines a first bit group in pixel response corrected image data by mapping a first bit group in the input image data based at least in part on a first pixel response correction look-up-table; determines a second bit group in the pixel response corrected image data by mapping a second bit group in the input image data based at least in part on a second pixel response correction look-up-table; and outputs the pixel response corrected image data to the display driver to enable the display driver to facilitate displaying the image frame by writing the display pixel based on the pixel response corrected image data.