Block-Based Display Driver for Consistent Afterimage Compensation
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Solution Overview
Problem
Existing display devices face challenges in maintaining consistent temperature data across different block areas, leading to afterimage detection errors and reduced afterimage compensation performance.
Innovation Solution
The display device divides the display area into block areas and calculates maximum and average temperature data for each block area, setting compensation gain values to correct image data, thereby improving temperature data consistency and compensating for image data changes due to temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display area is divided into block areas with separate temperature data calculation, then temperature data consistency is improved, but device complexity increases
Solution Approach 1:
The display area is divided into multiple block areas, and temperature data is calculated separately for each block area. This segmentation allows the display driver to handle temperature variations locally in different regions of the display panel, improving overall temperature data consistency without requiring a complete redesign of the entire system.
Solution Approach 2:
Different block areas are assigned different compensation gain values based on their specific temperature characteristics. This local quality approach enables tailored temperature compensation for each block area, allowing the system to optimize performance in each region while managing complexity through localized processing rather than global uniform treatment.
2Reliability
If compensation gain values are set for each block area, then afterimage compensation performance is improved, but manufacturing complexity increases
Solution Approach 1:
Compensation gain values are pre-calculated and stored in the display driver before actual operation. These pre-computed values are derived from characteristic current sensing data obtained during manufacturing or calibration, allowing the system to perform accurate temperature compensation during normal operation without complex real-time calculations, thus improving reliability while managing manufacturing complexity.
Solution Approach 2:
The system uses characteristic current sensing data as feedback to determine appropriate compensation gain values for each block area. This feedback mechanism allows the system to automatically adjust compensation parameters based on actual temperature conditions and pixel driving current measurements, improving afterimage compensation performance while keeping the manufacturing process manageable through automated parameter determination.
Data Source
AI summary
A display device includes a display panel displaying images with a plurality of pixels in a display area, a scan driver supplying compensation gate scan signals to the plurality of pixels in units of horizontal lines through compensation gate lines, a data driver detecting pixel driving current values output from the plurality of pixels by the compensation gate scan signals, generating data voltages according to compensation image data, and supplying the data voltage to data lines of the display area, and a display driver dividing the display area into block areas, setting compensation gain values for each of the block areas using the pixel driving current values, correcting image data with the compensation gain values, and supplying the corrected image data to the data driver, the display driver generating the compensation image data using the compensation gain values for each of the block areas.