Anti-Blue-Light Layer Positioning in Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices fail to effectively reduce high-energy shortwave blue light damage to human eyes, as anti-blue-light layers either reflect external blue light, causing secondary damage, or influence visual experience and image quality.
Innovation Solution
An anti-blue-light layer is positioned between the display panel and the backlight module, reflecting high-energy blue light from both sources while allowing other wavelengths to pass through, and is integrated with polarizers or light diffusion layers to absorb reflected blue light, reducing blue light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-blue-light layer is added on the light emergent side of the display panel, then blue light from the backlight module is reduced, but external blue light is reflected causing secondary damage to human eyes
Solution Approach 1:
The patent extracts the anti-blue-light layer from the light emergent side and relocates it to the light incident side of the display panel, between the backlight module and the display panel. This separation removes the harmful function (reflecting external blue light) from the beneficial function (blocking backlight blue light), solving the contradiction by taking out the problematic reflection characteristic from the user-facing side.
Solution Approach 2:
The patent converts the harmful reflection of external blue light into a beneficial effect by positioning the anti-blue-light layer at the light incident side. Here, the reflection redirects external blue light back into the display panel where it is absorbed by the liquid crystal layer and color filter, transforming the harmful reflected light into a contained phenomenon that actually reduces overall blue light transmission.
2Object-affected harmful factors
If an anti-blue-light layer is added to block blue light, then blue light damage is reduced, but visual effect and image quality are influenced
Solution Approach 1:
The patent applies local quality by making the anti-blue-light layer's blue light blocking function localized to the light incident side, while the light emergent side maintains its original optical properties. The anti-blue-light layer is positioned only where needed (at the backlight interface) and does not interfere with the overall display image quality or visual effect.
3Object-affected harmful factors
If an anti-blue-light layer is added, then blue light transmission is reduced, but light transmittance of the product is reduced
Solution Approach 1:
The patent changes the parameter of blue light wavelength selection by positioning the anti-blue-light layer to specifically target shortwave blue light (410-470 nm) from the backlight, while allowing other wavelengths to pass through. This selective parameter change reduces blue light transmission without significantly affecting overall light transmittance and display brightness.
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 configuration significantly reduces high-energy shortwave blue light emission from display devices, eliminating secondary damage and maintaining image quality by effectively reflecting and absorbing blue light from both internal and external sources.
Implementation Method 1
the anti-blue-light layer is capable of reflecting high-energy shortwave blue light incident from a direction of the backlight module and light incident from a direction of the display panel
Implementation Method 2
is integrated with polarizers or light diffusion layers to absorb reflected blue light, reducing blue light emission
Data Source
AI summary
An embodiment of by the present disclosure provides a display device including a display panel, an anti-blue-light layer and a backlight module, the anti-blue-light layer is positioned between the display panel and the backlight module, and the anti-blue-light layer is capable of reflecting high-energy shortwave blue light incident from a direction of the backlight module and high-energy shortwave blue light incident from a direction of the display panel.