Display Device Color Conversion for Power Optimization
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Solution Overview
Problem
Display devices with self-emitting elements face challenges in reducing power consumption, as simple conversion methods may not effectively lower the lighting of these elements, leading to increased power usage.
Innovation Solution
A display device and color conversion method that include a conversion processing unit to adjust the hue of input signals within a defined range, reducing the lighting of red, green, and blue sub-pixels while increasing the lighting of a white sub-pixel, thereby optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple color conversion process is performed to drive a four-color display device, then the display device can be operated, but the lighting amounts of self-emitting elements increase leading to high power consumption
Solution Approach 1:
The patent applies parameter changes by converting the input RGB signal through HSV color space transformation, where the hue parameter is strategically adjusted to enable more pixels to be driven at lower lighting amounts. The conversion process modifies color parameters (hue, saturation, value) to optimize power consumption while maintaining visual quality, specifically by shifting hues to allow greater use of lower-power pixel states.
2Illumination intensity
If the lighting amounts of self-emitting elements are increased to improve display quality, then the image quality is enhanced, but the power consumption increases
Solution Approach 1:
The patent implements partial action by selectively adjusting the lighting amounts of individual self-emitting elements based on their specific characteristics and the displayed image content. Rather than uniformly increasing all pixel lighting to improve display quality, the system applies partial adjustments only where necessary, using hue conversion to redistribute lighting requirements and minimize total power consumption while maintaining acceptable display quality.
3Use of energy by moving object
If the hue of color information is varied to reduce power consumption, then the power usage is optimized, but the color accuracy may be affected
Solution Approach 1:
The patent employs feedback mechanisms by continuously monitoring the displayed image characteristics and adjusting the hue conversion parameters accordingly. The system evaluates the impact of hue variations on both power consumption and color accuracy, using this feedback to optimize the conversion process. The hue is varied within ranges that balance power savings with acceptable color reproduction, ensuring that color accuracy remains within tolerable limits while achieving power optimization goals.
Data Source
AI summary
A display device includes an image display unit and a conversion processing unit that receives a first input signal including first color information which is obtained based on an input video signal and which is for displaying at a predetermined pixel, and outputs a second input signal including second color information in which a hue of the first color information is varied by an amount of hue variation within a range defined such that hue variation falls within a predetermined range.