Display Panel Stain Compensation With Eye-Tracked Memory Reduction
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Solution Overview
Problem
Display panels in display apparatuses suffer from luminance deviations due to manufacturing process deviations and element deterioration, leading to visible stains that increase power consumption through excessive memory access during compensation.
Innovation Solution
A display apparatus with a driving controller that performs stain compensation by adjusting data signals for specific areas of the panel, using an eye tracker to displace compensation areas based on user viewpoint, thereby reducing memory access and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stain compensation is performed for the entire panel area in every frame, then display quality is improved, but power consumption increases due to excessive memory access
Solution Approach 1:
The panel area is segmented into different compensation zones (first compensation area and second compensation area). The driving controller selectively applies stain compensation to different areas in different frames, performing full-area compensation in some frames and partial-area compensation in other frames, thereby reducing overall memory access while maintaining display quality.
Solution Approach 2:
The driving controller implements periodic stain compensation by alternating between full-area compensation frames and partial-area compensation frames. This periodic action reduces the frequency of full memory accesses while maintaining effective stain compensation over time, thus lowering power consumption.
2Manufacturing precision
If stain compensation is performed for the entire panel area, then display quality is improved, but memory access increases
Solution Approach 1:
The compensation area is segmented into a first compensation area and a second compensation area. The driving controller selectively accesses memory for different area sizes depending on the frame, reducing the quantity of memory access operations while maintaining compensation effectiveness.
Solution Approach 2:
Instead of performing full-area compensation in every frame, the system applies partial compensation (second compensation area) in certain frames, which is sufficient to maintain display quality while significantly reducing memory access quantity.
3Ease of operation
If fixed compensation areas are used for stain compensation, then processing is simplified, but adaptability to user viewing habits is reduced
Solution Approach 1:
The compensation areas are made dynamic rather than fixed. The driving controller adjusts the size and position of the second compensation area based on eye tracker information reflecting user viewing habits, enabling the system to adapt to different viewing scenarios while maintaining manageable processing through alternating frame patterns.
Solution Approach 2:
The system incorporates eye tracker feedback to dynamically adjust the compensation area. The eye tracker monitors user viewing behavior and provides feedback to the driving controller, which then adapts the compensation area accordingly, enhancing versatility while preserving processing simplicity through the alternating frame approach.
Data Source
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Figure 3A~3B
AI summary
A display apparatus includes a display panel, a driving controller and a data driver. The driving controller operates a stain compensation for a first compensation area of the display panel in a first frame and for a second compensation area of the display panel in a second frame to generate a data signal. The data driver converts the data signal into a data voltage and outputs the data voltage to the display panel.