Display Device Low Gray Single Color Image Compensation
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Solution Overview
Problem
Low gray single color images in display devices, such as organic light emitting display devices, suffer from luminance degradation and gradation aggregation, where adjacent low gray levels are not distinguished effectively.
Innovation Solution
A method is implemented in the display device to determine if an image is a single color image and low gray, and if so, adds sub-pixel data corresponding to a different color to improve luminance by generating compensated image data, which is then displayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a low gray single color image is displayed using conventional methods, then the display device can show the image, but the luminance is degraded and gradation aggregation occurs where adjacent low gray levels are not distinguished
Solution Approach 1:
The patent introduces a compensation mechanism that acts as an intermediary between the input image data and the displayed output. When a low gray single color image is detected, the system adds sub-pixel data from other color channels as a compensatory mediator to enhance luminance while preserving gradation information, thereby resolving the contradiction between luminance enhancement and gradation distinction
Solution Approach 2:
The patent dynamically changes the gray level parameter of sub-pixel data based on the detected luminance level and color composition of the input image. By adjusting the compensation amount according to the specific image characteristics, the system optimizes both luminance and gradation distinction simultaneously
2Reliability
If sub-pixel data is added to compensate for luminance in low gray single color images, then image quality improves, but processing complexity increases due to additional determination and compensation steps
Solution Approach 1:
The patent performs preliminary determination of whether the input image is a single color image and whether it is a low gray image before applying compensation. This preliminary action allows the system to prepare compensation strategies in advance, avoiding complex real-time processing during display and reducing overall processing complexity
Solution Approach 2:
The patent applies compensation only to specific cases (low gray single color images) rather than all images. By selectively applying the compensation mechanism only when necessary, the system improves image quality for problematic cases while minimizing the overall processing complexity burden
Data Source
AI summary
In a method of operating a display device, it is determined whether an image represented by input image data is a single color image, it is determined whether the image represented by the input image data is a low gray image, compensated image data are generated by adding sub-pixel data corresponding to a color different from a color of the single color image to the input image data when the image represented by the input image data is the single color image and the low gray image, and an image is displayed based on the compensated image data.