Dual Blue Sub-Pixel Display for Melatonin Management
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Solution Overview
Problem
Electronic devices emitting light in the wavelength range of 464 nm to 470 nm disrupt human melatonin secretion, affecting normal sleeping patterns.
Innovation Solution
A display device with two types of blue sub-pixels emitting light at different frequencies, where one sub-pixel emits light in the range of 464 nm to 470 nm to suppress melatonin and the other in the range of 440 nm to 464 nm to induce sleep, with a controller determining the driving mode based on time and location to minimize sleep disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light in the wavelength range of 464 nm to 470 nm is emitted from the display device, then the display quality is improved, but melatonin secretion is suppressed and normal sleeping pattern is disturbed
Solution Approach 1:
The blue sub-pixel is divided into two separate sub-pixels (first blue sub-pixel and second blue sub-pixel), each emitting different wavelengths. The first blue sub-pixel emits light in the 464-470 nm range for display quality, while the second blue sub-pixel emits light in the 440-464 nm range that does not suppress melatonin secretion. This segmentation allows the display to maintain quality while reducing harmful effects on sleep patterns.
Solution Approach 2:
The invention changes the wavelength parameter of light emission by using two different blue sub-pixels with distinct central wavelengths. By controlling which sub-pixel emits light based on time of day (daytime vs. nighttime modes), the system adjusts the wavelength parameter to either prioritize display quality or prioritize melatonin preservation, thereby resolving the contradiction between display performance and sleep health.
2Illumination intensity
If both blue sub-pixels emit light to maintain display quality, then the display performance is improved, but the harmful effect on sleep increases
Solution Approach 1:
The display device dynamically switches between different driving modes based on the time of day. During daytime, both blue sub-pixels can operate for optimal display performance. During nighttime, the system switches to a mode where only the second blue sub-pixel (440-464 nm) operates, reducing sleep disruption while maintaining adequate display function. This dynamic adjustment resolves the contradiction by adapting performance and harm levels to contextual needs.
Solution Approach 2:
The system changes operational parameters by selectively activating different blue sub-pixels based on time of day. The controller adjusts which sub-pixel emits light, changing the wavelength parameter of the displayed light. This parameter change allows the system to maintain display performance during daytime while minimizing sleep disruption during nighttime, thereby resolving the contradiction between performance and harm.
3Object-affected harmful factors
If only the second blue sub-pixel emits light to induce sleep, then melatonin secretion is preserved, but display quality may be compromised
Solution Approach 1:
The invention applies local quality by having different blue sub-pixels serve different functions. The second blue sub-pixel (440-464 nm) is optimized for nighttime use to preserve melatonin secretion, while the first blue sub-pixel (464-470 nm) is optimized for daytime use to enhance display quality. Each sub-pixel has localized optimization for its specific function, resolving the contradiction between sleep health and display performance through functional specialization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively manages melatonin secretion by adjusting light emission to either keep users awake during the day or induce sleep at night, depending on the time and location, thus maintaining normal sleep patterns.
Implementation Method 1
the first blue sub-pixel emits light of a first frequency, and the second blue sub-pixel emits light of a second frequency different from the first frequency. A central wavelength of the light emitted from the first blue sub-pixel is longer than a central wavelength of the light emitted from the second blue sub-pixel. The central wavelength of the light emitted from the first blue sub-pixel is in a range from about 464 nm to about 470 nm
Implementation Method 2
the second blue sub-pixel emits light of a second frequency different from the first frequency. A central wavelength of the light emitted from the second blue sub-pixel is in a range from about 440 nm to about 464 nm
Data Source
AI summary
A display device includes: a display unit; a plurality of pixels disposed in the display unit, each pixel including first and second blue sub-pixels; and a driving mode controller configured to set a driving mode to one of a first driving mode in which both of the first and second blue sub-pixels emit light, and a second driving mode in which one of the first and second blue sub-pixels emits light, wherein the first blue sub-pixel emits light of a first frequency, and the second blue sub-pixel emits light of a second frequency different from the first frequency.