Display Panel Gamma Voltage Compensation via Temperature Measurement
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Solution Overview
Problem
Display devices face challenges in maintaining display quality across varying temperatures, as existing technologies do not effectively compensate for temperature changes, leading to potential deterioration in image quality.
Innovation Solution
A display device system that includes a temperature measuring part, a panel driving block with a temperature difference calculating part and a compensation part, which generates a correction gamma voltage by adjusting a reference gamma voltage based on temperature differences, using lookup tables and memories to store gamma correction values and reference temperatures, ensuring consistent display quality regardless of temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature compensation is not implemented, then device complexity remains low, but display quality deteriorates with temperature variations
Solution Approach 1:
The patent pre-calculates and stores gamma correction values for multiple temperature conditions in lookup tables during the design phase. During operation, the system only needs to read the appropriate correction value based on measured temperature, avoiding complex real-time calculations and maintaining simple device architecture while ensuring display quality across temperature variations
Solution Approach 2:
The system dynamically adjusts gamma voltage parameters based on temperature measurements. By changing the gamma voltage parameter according to temperature conditions (using pre-stored correction values), the system maintains consistent display quality without requiring complex compensation mechanisms
2Reliability
If real-time temperature compensation calculations are performed, then display quality is maintained, but processing time increases
Solution Approach 1:
Gamma correction values for various temperature conditions are pre-calculated and stored in lookup tables before operation. When temperature changes occur, the system simply reads the corresponding pre-computed correction value instead of performing time-consuming real-time calculations, thus maintaining display quality while minimizing processing time
Solution Approach 2:
The system uses lookup tables that store copies of gamma correction values for different temperature conditions. Instead of recalculating corrections each time, the system retrieves stored correction copies based on current temperature, significantly reducing processing time while maintaining accuracy
Data Source
AI summary
A display device includes a display panel which displays an image, a panel driving block which provides a data signal to the display panel, and a temperature measuring part which measures a temperature of the display panel and provides a measurement temperature to the panel driving block. The panel driving block includes a first memory which stores a reference gamma voltage corresponding to a predetermined reference temperature, a temperature difference calculating part which calculates a temperature difference between the reference temperature and the measurement temperature, and a compensation part which generates a correction gamma voltage by correcting the reference gamma voltage based on the temperature difference between the reference temperature and the measurement temperature. The data signal is generated based on the correction gamma voltage and the image signal.