Luminance Compensation for Display Panels
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Solution Overview
Problem
The challenge is to address the significant luminance drop in display panels due to temperature variations, which affects the brightness and color accuracy of the display.
Innovation Solution
A luminance compensation method and display system that utilize temperature data to generate gamma adjustment points and a gamma correction curve, which are used to calibrate the display panel's brightness and maintain consistent image quality across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the size of light emitting elements is decreased to achieve higher resolution and wider color gamut, then the resolution and color gamut are improved, but the luminance drops significantly with temperature
Solution Approach 1:
The patent applies parameter changes by adjusting the emission period of sub-pixels based on temperature variations. The processing circuit modifies the duty cycle of the emission period dynamically according to the detected temperature, thereby compensating for the luminance drop caused by temperature increase in miniaturized light emitting elements.
2Reliability
If gamma correction is applied to compensate for luminance drop, then the brightness consistency is improved, but the device complexity increases due to additional processing circuits and correction tables
Solution Approach 1:
The patent implements preliminary action by pre-storing gamma correction tables that contain correction data for different temperature conditions. The processing circuit simply looks up the appropriate correction values from the pre-prepared table based on the current temperature, avoiding the need for complex real-time calculations and reducing circuit complexity.
3Stability of the object's composition
If temperature sensing and correction mechanisms are added to maintain luminance stability, then the luminance stability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements feedback by using a temperature sensor to continuously monitor the display panel temperature and feeding this information back to the processing circuit. The processing circuit then adjusts the emission period of sub-pixels based on the temperature feedback, creating a closed-loop system that automatically maintains luminance stability without requiring complex manual intervention.
Data Source
AI summary
A luminance compensation method includes the following steps. Temperature data of a display is received. A gamma correction table is obtained. Multiple gamma adjustment points are generated according to the temperature data and the gamma correction table. A gamma correction curve is generated according to the gamma adjustment points. The display displays an image according to the gamma correction curve.