Display Device Blue Light Reduction with Localized Color Preservation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blue light reduction functions in display devices often result in color distortion, particularly turning screens yellow, which leads to user inconvenience and causes users to disregard this feature.
Innovation Solution
A display device and method that minimize color distortion by detecting specific areas with sensitive color changes, such as human skin or memory colors, and reducing the blue component in these areas less than in other areas, while gradually changing colors near boundaries to maintain visual continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue light reduction function is executed by reducing blue component in the entire image, then blue light exposure is reduced, but color distortion occurs and screen turns yellow
Solution Approach 1:
The image is divided into multiple regions based on pixel characteristics. Regions with low blue component values (B≤threshold) are identified and separated from the rest of the image. Different blue light reduction strategies are applied to different regions, preserving color accuracy in sensitive areas while reducing blue light in other areas.
Solution Approach 2:
Different blue light reduction intensities are applied to different regions of the image. Regions with low blue component values maintain their original color characteristics (minimal reduction), while other regions receive stronger blue light reduction. This local differentiation resolves the contradiction by preserving color accuracy where needed while achieving blue light reduction where possible.
2Object-affected harmful factors
If blue component is reduced uniformly across the image, then blue light reduction is achieved, but user convenience deteriorates due to yellow screen output
Solution Approach 1:
The image is segmented into regions requiring different blue light reduction treatments. By identifying regions with low blue component values and applying minimal reduction to them, the overall screen appearance maintains better color balance, improving user convenience while still achieving blue light reduction in other areas.
Solution Approach 2:
Different blue light reduction levels are applied locally across the image. Regions sensitive to color changes (low B values) receive minimal reduction, while other regions receive stronger reduction. This localized approach maintains user convenience by preserving natural colors in critical areas while achieving the blue light reduction goal.
3Object-affected harmful factors
If blue light reduction is applied to all areas, then blue light exposure is minimized, but color distortion increases in sensitive areas
Solution Approach 1:
The image is divided into sensitive regions (low B values) and non-sensitive regions. Sensitive regions are identified by comparing pixel B values against a threshold. These regions are then excluded from aggressive blue light reduction, preserving color accuracy while allowing stronger reduction in non-sensitive areas to minimize overall blue light exposure.
Solution Approach 2:
Different blue light reduction intensities are applied to different regions based on their color characteristics. Regions with low blue component values (sensitive to color distortion) receive minimal reduction, while other regions receive stronger reduction. This resolves the contradiction by localizing the reduction intensity to match regional color sensitivity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device includes a display configured to display an image and a controller configured to reduce a blue component in the image when an execution command of a blue light reduction function is received. The controller may detect a preset part or color and perform control such that an amount of reduction of a blue component of an area corresponding to the detected part or color is different from that of the remaining area.