Display Panel Burn-In Compensation With Region-Specific Sampling
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Solution Overview
Problem
Display panels, such as OLED and LCD panels, experience uneven brightness and color shift due to varying pixel lifetimes, leading to burn-in phenomena, which existing technologies struggle to effectively compensate.
Innovation Solution
A method of burn-in compensation involving a display control circuit that adjusts the sampling period and uses a stress period gain to accurately record burn-in stress increments, allowing for precise calculation of compensation values by converting accumulated burn-in stress into compensation values using mapping tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed sampling period is used for burn-in compensation, then the control process is simple, but the compensation accuracy deteriorates due to inability to adapt to different burn-in stress conditions
Solution Approach 1:
The patent applies dynamics by making the sampling period variable rather than fixed. The sampling period is dynamically adjusted based on the accumulated burn-in stress level, allowing the system to adapt to different burn-in conditions. When burn-in stress is high, the sampling period is shortened to capture changes more frequently; when burn-in stress is low, the sampling period is extended to reduce processing overhead.
Solution Approach 2:
The patent changes the parameter of sampling period based on burn-in stress conditions. By monitoring the accumulated burn-in stress and adjusting the sampling period accordingly, the system optimizes the balance between compensation accuracy and processing efficiency. This parameter adaptation allows the system to respond appropriately to varying burn-in rates without requiring a fixed, overly conservative sampling rate.
2Measurement precision
If the sampling period is frequently updated to improve compensation accuracy, then the burn-in compensation precision improves, but the processing time and system complexity increase
Solution Approach 1:
The patent optimizes the sampling period parameter to balance accuracy and processing time. Instead of updating compensation values at every frame, the system determines optimal sampling periods based on current burn-in stress levels, reducing unnecessary processing while maintaining accuracy where needed.
Solution Approach 2:
The patent applies partial action by sampling only at strategically determined intervals rather than continuously. The sampling period is calculated to capture essential burn-in changes without requiring processing at every possible moment, thus achieving sufficient compensation accuracy with reduced processing overhead.
3Measurement precision
If different sampling periods are used for different display regions, then the burn-in compensation accuracy for each region improves, but the device complexity and processing overhead increase
Solution Approach 1:
The patent segments the display panel into multiple display regions, each with its own accumulated burn-in stress characteristics. By dividing the panel into regions and applying region-specific sampling periods based on local burn-in conditions, the system achieves more accurate compensation for areas with different usage patterns and aging rates.
Solution Approach 2:
The patent applies local quality by assigning different sampling periods to different display regions based on their specific burn-in stress levels. Regions experiencing higher burn-in stress receive more frequent sampling and compensation updates, while regions with lower stress receive less frequent updates, optimizing resources according to local needs.
Data Source
AI summary
A method of burn-in compensation for a display panel, a display control circuit, and a display device are provided. The method includes: performing a compensation calculation on input pixel data based on a first compensation value for the first display region, to generate output pixel data of the first display region, the first compensation value being determined based on a first accumulated burn-in stress of the first display region; sampling, based on a first sampling period, to obtain sampled pixel data of the first display region in a first sampled output frame; determining a first burn-in stress increment based on the sampled pixel data of the first display region; and generating a first updated accumulated burn-in stress based on the first accumulated burn-in stress and the first burn-in stress increment, or based on the first compensation value and the first burn-in stress increment, for updating the first sampling period.