Display Panel Brightness Control Using Non-Linear Gamma Mapping
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Solution Overview
Problem
Existing brightness adjustment systems for display panels face issues with flicker phenomena, especially at low brightness levels, due to the conversion of 10-bit control signals to 8-bit levels using linear mapping.
Innovation Solution
A method and system that involve receiving brightness control data and image data, converting them using specific algorithms to adjust the display panel's brightness, employing non-linear mapping techniques with threshold-based conversion curves to minimize flicker, allowing 10-bit data to control the display panel's brightness effectively within 256 levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If linear mapping is used to convert 10-bit control signal to 8-bit signal, then brightness control is achieved, but flicker phenomenon occurs during brightness adjustment especially at low brightness levels
Solution Approach 1:
The patent applies parameter changes by transforming the linear mapping relationship into a non-linear mapping relationship. Specifically, it uses gamma correction with a gamma value of 2.2 to adjust the brightness control data, changing the mathematical parameters of the conversion function. This non-linear transformation redistributes the brightness levels to eliminate the flicker phenomenon while maintaining smooth brightness transitions across the full range from minimum to maximum brightness.
2Adaptability or versatility
If 10-bit control signal is converted to 8-bit levels, then brightness adjustment capability is provided, but loss of precision occurs in brightness control
Solution Approach 1:
The patent resolves the precision loss by applying gamma correction with gamma=2.2, which changes the parameter distribution of the 8-bit brightness levels. This non-linear mapping stretches the lower brightness levels and compresses the higher levels, effectively utilizing the available 8-bit range to represent the full 10-bit brightness control range without visible loss of precision in the displayed brightness levels.
Data Source
AI summary
A method for adjusting brightness of a display panel and a brightness adjustment system are provided. The brightness adjustment system includes a display panel and a first controller. According to the provided method, the first controller receives first brightness control data and receives first image data to be displayed on the display panel. The first controller further converts the first image data into second image data according to the first brightness control data for adjusting the brightness of the display panel.