Backlight Module Edge Blue Flare Prevention
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Solution Overview
Problem
Blue flare occurs at the edge regions of display devices due to unconverted blue light, affecting display quality and potentially causing eye damage from macular degeneration.
Innovation Solution
A backlight module design featuring a light guide plate with a quantum dot enhanced film (QDEF) light conversion layer that extends to the edges of the light exit surface, accompanied by reflective layers to ensure complete conversion of blue light to red and green light, preventing flare and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum dot enhanced film is disposed on the light exit surface to convert blue light to red and green light, then color gamut and color saturation are improved, but blue flare occurs at edge regions and display quality deteriorates
Solution Approach 1:
The light conversion layer is extended from the traditional position to cover the edge regions of the light guide plate, adding spatial dimension coverage. This extension ensures that blue light is converted to red and green light even at the edges, preventing blue flare while maintaining wide color gamut and high color saturation throughout the entire display surface.
Solution Approach 2:
The patent applies different functional zones within the light conversion layer: the central region converts blue light for wide color gamut, while the extended edge regions specifically target blue light conversion to prevent blue flare. This local differentiation of function resolves the contradiction between color performance and blue light control.
2Object-affected harmful factors
If the light conversion layer is extended to the edge of the light guide plate, then blue flare is prevented, but the complexity of the light conversion layer structure increases
Solution Approach 1:
The patent merges the light conversion function with the edge coverage function into a single integrated light conversion layer. By using one continuous layer that serves both color conversion and blue flare prevention purposes, the design avoids the complexity of multiple separate components while achieving both objectives.
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 extended light conversion layer and reflective layers effectively convert blue light across the entire light exit surface, preventing blue flare and enhancing display quality while minimizing eye strain.
Implementation Method 1
the quantum dots emit colored light when receiving light stimulation, and the color of the light is determined by the material and size/shape of the quantum dots
Implementation Method 2
a first reflective layer, wherein the first reflective layer is close to the first edge, and is disposed between the light exit surface and the light conversion layer
Data Source
AI summary
A backlight module including a back plate, a light guide plate, a light source, a plastic frame, and a light conversion layer is provided. The light guide plate is disposed on the back plate and has a light incident surface and a light exit surface, wherein a first edge of the light exit surface is adjacent to the light incident surface. The light source is disposed on the back plate and faces the light incident surface. The plastic frame is disposed on the back plate and covers the first edge. The light conversion layer is disposed on the light exit surface and extends to the first edge.