Display Saturation Compensation for Visibility and Power
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Solution Overview
Problem
Existing OLED display devices face challenges in improving external visibility while maintaining low power consumption, as increasing luminance to enhance visibility often leads to increased power consumption due to light emission from pixels.
Innovation Solution
A method and display device that calculates compensation ratios based on the rate of change of luminance, saturation, and power consumption to generate compensation image data, which is then used to adjust the saturation of red, green, and blue images, thereby increasing external visibility without significantly increasing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If luminance is increased to improve external visibility, then external visibility is improved, but power consumption increases
Solution Approach 1:
The patent changes the parameter from luminance (brightness) to saturation (color intensity) to improve external visibility. By increasing saturation through compensation image data while maintaining or reducing luminance, the display achieves better visibility without the power consumption penalty associated with brighter displays.
Solution Approach 2:
Instead of improving visibility by increasing luminance (the conventional approach), the patent inverts the approach by improving visibility through saturation enhancement. This reverse strategy allows visibility improvement while avoiding the power consumption increase that would result from higher luminance.
2Illumination intensity
If saturation is increased to improve external visibility, then external visibility is improved, but power consumption may increase
Solution Approach 1:
The patent employs feedback mechanisms by calculating compensation ratios based on the rate of change of luminance, saturation, and power consumption. The system continuously monitors these parameters and adjusts the compensation image data accordingly, ensuring saturation enhancement does not lead to power consumption increases.
Solution Approach 2:
The patent makes the saturation adjustment dynamic by calculating compensation ratios based on the rate of change of various parameters. Rather than applying a fixed saturation increase, the system dynamically adjusts saturation levels based on current display conditions and power consumption rates, allowing saturation to be increased only when it does not cause power consumption to rise.
3Illumination intensity
If compensation image data is generated to increase saturation, then external visibility is improved, but device complexity increases
Solution Approach 1:
The patent segments the image processing into distinct components: calculating luminance data, saturation data, and power consumption data separately; determining rate of change for each parameter; calculating compensation ratios based on these segmented calculations; and applying compensation to generate the final image data. This segmentation makes the complex processing more manageable and systematic.
Data Source
AI summary
A display device configured to reduce power consumption, in accordance with an exemplary embodiment of the present invention, includes a signal controller configured to calculate saturation data, luminance data, and power consumption data of input image data, to calculate a compensation ratio based on a rate of change of luminance, a rate of increase of saturation, or a power consumption, to generate compensation image data having a saturation of a red, green, or blue image of the input image data increased up to a threshold value so that the compensation ratio exceeds a reference value, and to send the generated compensation image data to a data driver, and the data driver configured to supply data voltages corresponding to the compensation image data, in response to gate signals sequentially generated from a gate driver to a display panel.