OLED Contrast via HSI Intensity Histogram
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Solution Overview
Problem
Current OLED display technologies face challenges in enhancing contrast while maintaining high display quality and reducing power consumption, as direct contrast enhancement methods in the RGB space can lead to color loss and inefficient power management.
Innovation Solution
The method involves converting original RGB signals into HSI color space, performing histogram statistics on the intensity component, calculating a conversion parameter, and applying a contrast enhancement treatment to the intensity component while keeping hue and saturation components unchanged, resulting in a new low driving voltage and enhanced contrast signal for the OLED display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If direct contrast enhancement treatment is implemented to the image in the RGB space model, then the contrast of the OLED display panel is improved, but colors are lost and display quality deteriorates
Solution Approach 1:
The patent transforms the image from RGB color space to HSI color space, where the image is represented by hue (H), saturation (S), and intensity (I) components. Contrast enhancement is then applied specifically to the intensity component while keeping hue and saturation unchanged, and the result is transformed back to RGB space. This parameter-based approach allows selective enhancement of contrast without affecting color accuracy, thereby resolving the contradiction between improving contrast and maintaining display quality.
2Illumination intensity
If the driving current is increased to enhance the brightness and contrast of the OLED, then the display quality is improved, but the power consumption increases
Solution Approach 1:
The patent applies contrast enhancement to the image signal before it is sent to the OLED display. By pre-processing the image to enhance contrast through intensity component adjustment in HSI color space, the OLED can display images with higher contrast at lower driving currents, thereby reducing power consumption while maintaining or improving display quality.
3Illumination intensity
If the driving voltage is increased to improve the contrast ratio of the OLED display, then the contrast is enhanced, but the power consumption and risk of damage increase
Solution Approach 1:
The patent enhances contrast by pre-processing the image signal through intensity component adjustment in HSI color space before display. This allows the OLED to achieve higher contrast ratios without increasing the driving voltage, thereby reducing power consumption and eliminating the risk of voltage-related damage while maintaining enhanced contrast performance.
Data Source
AI summary
A method of raising contrast of an OLED display panel converts an original RGB signal into a HSI color space constructed by a hue component, a saturation component and an intensity component, and implements histogram statistics to the intensity component to obtain a histogram of the intensity component, and obtains a conversion parameter according to the histogram of the intensity component, and obtains the new low driving voltage with calculation of the conversion parameter in combination with the original low driving voltage, and meanwhile, keeps the hue component and the saturation component unchanged, and implements enhancement treatment to the intensity component to obtain a new intensity component, and then, converts the hue component, the saturation component and the new intensity component into a RGB color space to obtain a new R′G′B′ signal supplied to a pixel driving circuit.