Display Panel Subpixel Luminance Compensation for Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display panels using white subpixels face issues with high power consumption due to the need for multiple subpixels to illuminate simultaneously, leading to color shift and inefficient brightness distribution.
Innovation Solution
A display method and panel design where each pixel unit comprises a mixed color subpixel and three single color subpixels, with a processor system that calculates and adjusts luminance and color compensation ratios to ensure only three subpixels illuminate at a time, optimizing power usage and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple subpixels illuminate simultaneously to achieve full color display, then display completeness is improved, but power consumption increases
Solution Approach 1:
The patent implements frame-by-frame analysis where the controller selectively activates different subpixel combinations in alternating frames. For example, in odd frames it uses RGB subpixels while in even frames it uses R+W subpixels, achieving temporal multiplexing that reduces overall power consumption while maintaining complete color display capability across frames
Solution Approach 2:
The system dynamically adjusts subpixel activation based on image content analysis. The controller evaluates luminance values and color requirements of each pixel in real-time, then adaptively determines which subpixels to activate. This dynamic adaptation allows the display to use only necessary subpixels for each specific image, reducing power consumption while maintaining display completeness
2Illumination intensity
If white subpixels are used to improve light-emitting efficiency, then brightness is improved, but color accuracy deteriorates due to color shift
Solution Approach 1:
The patent incorporates color compensation mechanisms where the controller calculates required color adjustments based on the combination of active subpixels. When white subpixels are activated, the system computes compensation values for the red, green, and blue channels to counteract the color shift, ensuring accurate color reproduction despite the presence of broadband white light
Solution Approach 2:
The system changes the luminance parameters of individual subpixels dynamically. When white subpixels are used, the controller adjusts the drive currents of RGB subpixels to compensate for color imbalance. By varying these parameters based on the active subpixel configuration, the system maintains color accuracy while utilizing the high brightness capability of white subpixels
3Adaptability or versatility
If conventional RGB subpixel arrangement is used, then color display is achieved, but power consumption is high due to simultaneous illumination requirement
Solution Approach 1:
The patent segments the color display function across different subpixel groups and time frames. Instead of requiring all RGB subpixels to be active simultaneously, the system divides color reproduction into multiple subpixel combinations activated at different times (e.g., RGB in odd frames, R+W in even frames), reducing the number of simultaneously active subpixels while maintaining complete color display capability
Solution Approach 2:
The white subpixels serve multiple functions: they provide brightness enhancement, enable power reduction through selective activation, and participate in color compensation schemes. The same white subpixel can replace different combinations of RGB subpixels depending on the image content, providing universal functionality that reduces power consumption across various display scenarios
Data Source
AI summary
The present disclosure relates to a display method of a display panel. The display method may include obtaining original luminance of three single color subpixels in each of the pixel units based on an image to be displayed; obtaining luminance compensation values of the three single color subpixels that need to be color compensated at a time of obtaining the luminance of the mixed color subpixel as the first substitute luminance; calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation; and setting input luminance of the single color subpixel having the smallest luminance of the mixed color as 0, and obtaining actual luminance of the other single color subpixels and the mixed color subpixel.