Display Red-Light Mode for Preserving Scotopic Vision
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Solution Overview
Problem
Display devices often inadvertently cause users to lose their scotopic vision due to sudden exposure to bright or high-frequency light, especially in environments where users have adapted to low-light conditions, leading to inconvenience or safety risks.
Innovation Solution
Implementations on display devices detect when scotopic vision is achieved and transition to a scotopic preservation mode, adjusting display settings to use only red light and minimizing other light sources, sounds, and notifications to maintain and enhance scotopic vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display presents image content in full color with normal brightness, then the display provides good visual quality and full color viewing, but the user's scotopic vision is degraded or lost
Solution Approach 1:
The display device changes the color temperature parameter of the backlight, shifting from standard white light (around 6504K) to warmer tones (2000K-4000K) or red light (630nm-780nm wavelength). This parameter change reduces the blue light content while maintaining visibility, thereby preserving scotopic vision while still providing usable display output
Solution Approach 2:
The display transitions from presenting full-color images to presenting images in red color or warm tones. This color change eliminates or reduces the harmful blue light frequencies that cause scotopic vision degradation, while still allowing the user to perceive image content through the remaining color channels
2Ease of operation
If the display switches from scotopic preservation mode back to full color mode, then the display restores full visual functionality, but the user experiences delayed adaptation time to regain scotopic vision
Solution Approach 1:
The display device implements dynamic switching between normal mode and scotopic preservation mode based on real-time detection of ambient light conditions and user behavior patterns. The system can transition between modes smoothly, allowing the user to regain scotopic vision quickly when needed while maintaining full functionality when in normal mode
3Reliability
If the display detects and preserves scotopic vision by using red light, then the user's night vision is maintained, but the display can no longer present full color image content
Solution Approach 1:
The display applies partial color action by selectively activating only the red color channel or reducing blue light emission while maintaining green and red channels. This partial action preserves enough color information for basic image perception while eliminating the harmful blue light that degrades scotopic vision
Data Source
AI summary
An illustrative display device preserves scotopic vision for a user. The display device includes a display configured to present image content, a memory storing instructions and operating parameters, and a processor coupled to the memory and configured to execute the instructions. The operating parameters may include a color parameter and an additional parameter, such that the execution of the instructions allows the processor to switch the display device between: 1) a normal operating mode in which the color parameter is set to cause the display to present the image content in full color and the additional parameter is set to a first setting, and 2) a scotopic preservation mode in which the color parameter is set to cause the display to present the image content in red color and the additional parameter is set to a second setting different from the first setting. Corresponding methods and devices are also disclosed.