Display Device Pixel Temperature Compensation
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Solution Overview
Problem
Light emitting display devices experience degradation in display characteristics due to temperature changes, leading to variations in luminance and color accuracy.
Innovation Solution
A display device comprising a display panel, a temperature calculator, and a data compensator, where the temperature calculator senses block temperatures and calculates pixel temperatures, and the data compensator generates compensation image data to adjust the image data based on temperature variations, ensuring consistent display characteristics across temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting display devices operate without temperature compensation, then the device structure remains simple, but display characteristics degrade due to temperature changes
Solution Approach 1:
The display panel is divided into multiple block areas, with temperature sensors distributed across different blocks. This segmentation allows localized temperature measurement and compensation, improving display characteristics stability without requiring a single complex centralized system.
Solution Approach 2:
Temperature compensation is performed in advance by calculating compensation values based on sensed temperatures before they cause significant display degradation. The compensation image data is generated proactively to prevent luminance and color accuracy issues rather than correcting them after they occur.
2Stability of the object's composition
If temperature compensation is implemented, then display characteristics remain uniform, but the device complexity increases
Solution Approach 1:
The system changes the temperature parameter by applying compensation values that adjust the display output based on detected temperature variations. This allows uniform display characteristics to be maintained across different temperature conditions without fundamentally altering the device structure.
Solution Approach 2:
Compensation image data serves as an intermediary between the temperature sensing system and the display output. This intermediate layer processes temperature information and translates it into corrective display adjustments, simplifying the overall system architecture while maintaining display uniformity.
3Device complexity
If block temperature sensing is used instead of individual pixel sensing, then the sensing system complexity is reduced, but temperature measurement precision decreases
Solution Approach 1:
Temperature sensors are strategically placed in representative locations within each block area to capture local temperature characteristics. This local measurement approach, combined with block-based processing, achieves adequate precision for compensation purposes while keeping the sensing system simple and manageable.
Data Source
AI summary
Disclosed is a display device including a display panel, a temperature calculator, and a data compensator. The display panel includes a plurality of pixels. Each of the pixels includes one of a first light emitting element, a second light emitting element, and a third light emitting element. The temperature calculator senses a block temperature for each of a plurality of block areas partitioned in the display panel and calculates temperature of each of the plurality of pixels based on the block temperature. The data compensator generates compensation image data by compensating for image data corresponding to each of the pixels depending on the temperature.