Doped Layer Blue Light Conversion in Display Screens
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Solution Overview
Problem
Conventional blue light filters in display devices increase thickness and reduce brightness, while also impacting image quality due to their inefficiencies in managing blue light emission, which is harmful to users.
Innovation Solution
Incorporating a doped layer in the display screen stack with blue light filtering materials like Zinc Oxide, Gallium Oxide, or Silver nanoparticles to convert blue light into red and green light, thereby reducing blue light emission without increasing device thickness or degrading image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional blue light filters are introduced into the display device, then blue light emission is reduced, but display device thickness increases and display brightness output is reduced
Solution Approach 1:
The patent changes the optical parameters of existing display layers by applying doping materials (Zinc Oxide, Gallium Oxide, or Silver nanoparticles) to convert the function of blue light filtering to blue light conversion. This parameter change allows the same layer to perform both blue light management and light transmission functions, eliminating the need for additional filter layers and maintaining thin device profile.
Solution Approach 2:
The patent makes existing display screen stack layers multi-functional by enabling them to both display information and manage blue light emission. The doped layer simultaneously serves as a display layer and a blue light conversion layer, converting blue light to red and green light while maintaining its primary display function, thus eliminating the need for separate conventional blue light filter layers.
2Object-affected harmful factors
If conventional blue light filters are introduced into the display device, then blue light emission is reduced, but display brightness output is reduced
Solution Approach 1:
The patent converts the harmful blue light into beneficial red and green light that contributes to display brightness and image quality. Instead of simply blocking blue light and losing its energy, the doped layer converts blue light photons into red and green light photons that are visible and contribute to the overall display output, thus turning a harmful factor into a beneficial one while maintaining brightness.
Solution Approach 2:
The patent changes the optical conversion parameters by using specific doping materials with defined bandgap energies that enable efficient blue-to-red-green light conversion. This parameter optimization ensures that the conversion process maintains high efficiency and preserves overall display brightness while reducing harmful blue light emission.
3Object-affected harmful factors
If conventional blue light filters are introduced into the display device, then blue light emission is reduced, but display image quality is impacted
Solution Approach 1:
The patent makes the display layer multi-functional by enabling it to both display information accurately and manage blue light emission simultaneously. The doped layer maintains its primary function of displaying high-quality images while adding the secondary function of blue light conversion, eliminating the need for separate filter layers that would compromise image quality.
Solution Approach 2:
The patent optimizes the doping material parameters (concentration, particle size, distribution) to achieve precise control over blue light conversion while maintaining excellent display image quality. The doping amount is carefully controlled to convert blue light effectively without interfering with the RGB ratio or shifting the white point, thus preserving manufacturing precision and image quality.
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
This solution effectively manages blue light emission, reducing harmful effects on users while maintaining display brightness and image quality, providing a thinner and more efficient alternative to conventional blue light filters.
Implementation Method 1
a doped layer that includes a doping material in a doping amount that configures the doped layer to convert a first portion of the blue light received by the display screen stack to at least one of red light and green light
Data Source
AI summary
A blue light emissions management system includes a blue light emitting device that is configured to emit blue light. The blue light emissions management system also includes a display screen stack that is located adjacent the blue light emitting device and that is configured to receive blue light emitted from the blue light emitting diode. The display screen stack includes a doped layer that includes a doping material in a doping amount that configures the doped layer to convert a first portion of the blue light received by the display screen stack to at least one of red light and green light.