Pixel Brightness Compensation Using Extracted Data
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Solution Overview
Problem
Display devices face image quality distortion due to brightness variations caused by manufacturing defects and transistor threshold voltage changes, leading to increased costs from compensation circuits.
Innovation Solution
A method and device that integrate a low-capacity memory with a driving chip to detect and correct pixel brightness differences, generating compensation data for pixels with excessive brightness variations, reducing the need for extensive memory storage and maintaining image quality across multiple display units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a compensation circuit is added to correct brightness variations, then image quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by detecting brightness variations and generating compensation data before final display output. The compensation circuit pre-calculates correction values based on detected brightness differences, and this compensation data is stored and applied in advance to correct image data, eliminating the need for complex real-time compensation hardware and reducing manufacturing costs.
Solution Approach 2:
The patent introduces an intermediary compensation data structure that mediates between the detected brightness variations and the final display output. Instead of directly modifying the display hardware or using complex compensation circuits, the system uses compensation data as an intermediary layer to correct brightness issues through software-based image data adjustment.
2Measurement precision
If memory capacity is increased to store compensation data for all pixels, then brightness correction accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies the extraction principle by isolating and processing only the compensation data portion from the full image data. Instead of storing and processing complete high-resolution compensation maps for every pixel, the system extracts essential brightness variation information and stores only the necessary compensation values, significantly reducing memory capacity requirements while maintaining correction effectiveness.
Solution Approach 2:
The patent implements local quality by applying different compensation strategies to different regions or pixel types based on their specific brightness characteristics. Rather than using a uniform high-precision compensation approach for all pixels, the system tailors compensation data storage and processing to local brightness variation patterns, reducing overall memory requirements while maintaining accuracy where needed.
Data Source
AI summary
Provided are a display device and a method of controlling a brightness of the display device.The method of controlling a brightness of the display device according to an embodiment includes: applying first input image data to a display unit including a plurality of pixels to display a first image; detecting a brightness for each pixel from output image data of the first image displayed on the display unit, and extracting compensation pixels each having a brightness difference exceeding a reference value, the brightness difference being a difference between a detected brightness and a reference brightness; and generating compensation data of the compensation pixels based on the brightness differences of the compensation pixels.