Backlight Luminance Control via Color Gamut Boundary Mapping
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Solution Overview
Problem
Conventional display technologies face challenges in enhancing display quality, particularly in efficiently managing luminance levels to reduce power consumption and improve color representation, especially when dealing with high gradation values and saturated colors.
Innovation Solution
A display apparatus and driving method that include a data processing circuit to map image signals to a color gamut, set backlight luminance levels based on color gamut boundaries adjacent to saturation regions, and utilize a backlight luminance controller with histogram analysis and bin weighting to determine optimal luminance levels, ensuring efficient power usage and improved color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight luminance is increased to improve color saturation and display quality, then the color representation is improved, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the backlight luminance level based on the actual color gamut requirements of the displayed image content. Instead of using a fixed high luminance level, the system analyzes the image signals to determine the appropriate luminance level needed to achieve the desired color saturation, thereby reducing power consumption when full luminance is not required.
Solution Approach 2:
The patent changes the luminance level parameter of the backlight based on the color gamut boundary analysis of the image signals. By mapping image signals to the display's color gamut and identifying the luminance level corresponding to the color gamut boundary adjacent to the saturation region, the system optimizes the backlight luminance parameter to achieve both good color representation and energy efficiency.
2Illumination intensity
If the backlight luminance is set to a fixed high level to ensure color saturation, then the color representation is improved, but the power consumption increases and display quality may deteriorate due to loss of gradation information
Solution Approach 1:
The system dynamically determines the appropriate backlight luminance level for each frame based on the image content's color gamut characteristics. This dynamic adjustment preserves gradation information by matching the backlight luminance to the actual requirements of the displayed content, preventing the loss of detail that occurs with fixed high luminance settings.
Solution Approach 2:
The patent implements a feedback mechanism where the data processing circuit analyzes the image signals, maps them to the display's color gamut, and uses this information to control the backlight luminance level. This closed-loop control ensures that the backlight luminance is optimized for each specific image content, maintaining display quality while avoiding unnecessary power consumption.
Data Source
AI summary
A display apparatus includes a display panel in which a plurality of pixel units are disposed, a backlight providing light to the display panel, and a data processing circuit receiving image signals and providing the image signals to the plurality of pixel units. The data processing circuit sets a luminance level of the backlight to a value corresponding to a color gamut boundary of the image signals adjacent to a saturation region.