Quantum Dot Backlight Module Colloid Layer Light Extraction
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Solution Overview
Problem
The existing quantum dot backlight modules suffer from low light-exiting efficiency due to increased distance between the blue light source and the light guide plate and excessive scattering, leading to reduced light extraction efficiency.
Innovation Solution
A quantum dot backlight module design featuring a light source, a quantum dot layer that emits fluorescence, and a light guide plate, with a colloid layer for close bonding between the light source and the quantum dot layer, and a light efficiency amplification medium layer that reduces light loss by minimizing refractive index differences and avoiding air layers, thereby enhancing light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum dot glass tube structure is used to improve color gamut, then the color performance is improved, but the distance between light source and light guide plate increases, reducing light extraction efficiency
Solution Approach 1:
The patent introduces a colloid layer as an intermediary substance between the light source and quantum dot layer. This colloid layer has optimized refractive index properties that enable effective light transmission while maintaining close coupling between components, thus improving light extraction efficiency without compromising color gamut performance
Solution Approach 2:
The patent merges the light source and quantum dot layer into a closely integrated structure using the colloid layer, eliminating the need for separate glass tube packaging. This merging reduces the overall distance between light source and light guide plate, thereby improving light extraction efficiency while maintaining color performance
2Illumination intensity
If a quantum dot diaphragm structure is used to improve color gamut, then the color performance is improved, but excessive scattering occurs, increasing light loss
Solution Approach 1:
The patent changes the physical and optical parameters of the medium between light source and quantum dots by using a colloid layer with specifically controlled refractive index. This parameter optimization reduces unnecessary scattering events while maintaining effective light transmission to the quantum dot layer, thereby reducing light loss
Solution Approach 2:
The patent applies local quality optimization by creating a colloid layer with specific refractive index properties only in the critical region between light source and quantum dot layer. This localized optimization reduces scattering in the critical path while maintaining color gamut performance
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 design improves light-emitting efficiency by reducing light loss and increasing the coupling angle between the light source and the light guide plate, resulting in enhanced color gamut and performance.
Implementation Method 1
a quantum dot layer (3), which emits fluorescence after being excited by light that is emitted by the light source
Implementation Method 2
a colloid layer is arranged between the light source and the quantum dot layer so as to enable the light source and the quantum dot layer to be bonded with each other closely
Implementation Method 3
a light guide plate, which guides the fluorescence that is emitted by the quantum dot layer to a required direction
Implementation Method 4
a light guide plate, which guides the fluorescence that is emitted by the quantum dot layer to a required direction
Data Source
AI summary
A quantum dot backlight module is disclosed. The quantum dot backlight module comprises a light source; a quantum dot layer, which emits fluorescence after being excited by light that is emitted by the light source; and a light guide plate, which guides the fluorescence that is emitted by the quantum dot layer to a needed direction, wherein the quantum dot layer is arranged on a light-entering side of the light guide plate, and a colloid layer is arranged between the light source and the quantum dot layer so as to enable the light source and the quantum dot layer to be bonded with each other closely, whereby the light source, the quantum dot layer, and the light guide plate are assembled together. According to the present disclosure, the light transmission mode of the light source after entering into the light guide plate is changed through changing the structure of the quantum dot backlight module, so that the light loss thereof can be reduced, and the light-emitting efficiency of the backlight module can be improved.