Liquid Crystal Display Brightness Reduction via Gamma Curve Transformation
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Solution Overview
Problem
Existing display technologies fail to adequately reduce screen brightness in extremely dark ambient light conditions, despite maximizing backlight reduction, as the display content remains glaring due to the incapability of meeting ambient light requirements.
Innovation Solution
A method and device that acquire a transformed gamma curve by reducing grayscale voltage in an initial gamma curve according to a preset ratio, querying and outputting the corresponding grayscale voltage to the liquid crystal display screen, thereby reducing display brightness effectively in low-light environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the backlight is maximally reduced, then the energy consumption is reduced, but the display content remains glaring and does not meet the ambient light requirement in extremely dark environments
Solution Approach 1:
The patent transforms the initial gamma curve to generate a new gamma curve with modified grayscale voltage values. By changing the voltage parameters applied to the liquid crystal display screen, the display brightness is reduced to match extremely dark ambient light conditions, eliminating glare while maintaining image quality.
Solution Approach 2:
The system pre-calculates and stores multiple transformed gamma curves corresponding to different ambient light conditions. When the ambient light sensor detects extremely dark conditions, the system immediately switches to the appropriate pre-transformed gamma curve, enabling rapid adaptation without real-time calculation delays.
2Illumination intensity
If the grayscale voltage is reduced to lower display brightness, then the display adapts to dark ambient light, but the gamma curve transformation complexity increases
Solution Approach 1:
The patent pre-calculates transformed gamma curves for various ambient light conditions and stores them in memory. This preliminary preparation eliminates the need for complex real-time calculations during operation, reducing computational complexity while maintaining the ability to adapt to different lighting conditions.
Solution Approach 2:
The system dynamically selects and switches between pre-calculated gamma curves based on ambient light sensor readings. This dynamic adaptation allows the display to respond to changing light conditions without requiring complex real-time gamma transformation calculations, simplifying the operational complexity.
Data Source
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AI summary
The present disclosure discloses a method and device for reducing display brightness, and belongs to the technical field of display. According to the present disclosure, a transformed gamma curve is acquired, a corresponding grayscale voltage in the transformed gamma curve is queried according to a grayscale pixel value of a pixel to be displayed, and the queried grayscale voltage is output to a data line corresponding to the pixel in a liquid crystal display screen at a scanning moment corresponding to the pixel.