Display Controller Selective Mura Correction Thermal Management
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Solution Overview
Problem
Display devices experience excessive temperature increases during mura correction operations, which can lead to damage and abnormal operation due to increased temperatures of components like controllers and power management circuits.
Innovation Solution
A display device with a controller that includes a pattern detection block to selectively perform mura correction based on the presence of a predetermined pattern in the input image data, preventing excessive temperature increases by deciding whether to perform mura correction operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mura correction operation is performed to improve luminance and color coordinate uniformity, then display quality is improved, but temperature of controller and power management circuit increases excessively
Solution Approach 1:
The system dynamically adjusts the mura correction operation based on real-time temperature monitoring. The controller selectively performs mura correction only when temperature is within a safe range, and skips the operation when temperature exceeds the threshold, thereby adapting the correction process to current thermal conditions to prevent excessive temperature increase while maintaining display quality when conditions permit
Solution Approach 2:
The system changes the operational parameter of mura correction from a fixed always-on mode to a conditional mode based on temperature parameters. By monitoring temperature and using it as a control parameter, the system adjusts whether mura correction is applied, thus preventing excessive temperature rise while preserving the benefit of improved uniformity when thermal conditions are acceptable
2Manufacturing precision
If mura correction operation is performed continuously to maintain uniformity, then display quality is maintained, but reliability decreases due to excessive temperature causing damage or abnormal operation
Solution Approach 1:
The system implements a feedback mechanism where the temperature sensor continuously monitors the temperature of the controller and power management circuit, and this temperature information feeds back to the controller to determine whether to perform mura correction. This closed-loop control ensures that mura correction is only applied when temperature is safe, preventing thermal damage and maintaining operational reliability while still achieving uniformity when conditions permit
Solution Approach 2:
The system prepares for potential thermal damage by monitoring temperature in advance and preventing mura correction operation before temperature reaches dangerous levels. By using temperature threshold monitoring, the system creates a safety buffer that prevents excessive heating and potential component failure, thus protecting reliability while allowing beneficial mura correction when thermal conditions are safe
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, a gate driver configured to provide gate signals to the plurality of pixels, a data driver configured to provide data signals to the plurality of pixels, a correction data memory configured to store mura correction data, and a controller configured to control the gate driver and the data driver. The controller includes a pattern detection block configured to detect a set pattern in input image data, and a mura correction block configured to perform a mura correction operation that corrects the input image data based on the mura correction data in response to the set pattern not being detected, and to not perform the mura correction operation in accordance with the set pattern being detected.