Quantum Dot Color Filter for Display Light Transmittance
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Solution Overview
Problem
Color filters in display panels have low light transmittance due to the absorption of most backlight, resulting in wasted light and inefficient image display.
Innovation Solution
Incorporation of quantum dot particles made of inorganic nano-materials within the color filter, which convert specific wavelengths of the backlight into the desired colors, allowing most of the white backlight to pass through and be utilized for displaying full-color images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter is used to display full-color images, then color display capability is improved, but light transmittance deteriorates due to absorption of most backlight
Solution Approach 1:
The patent changes the material composition parameter of the color filter by incorporating quantum dot particles (specific sizes: 2-5nm for red, 3-6nm for green, 2-4nm for blue) into the color filter layer. This parameter change enables the color filter to convert absorbed light wavelengths into desired colors through quantum confinement effects, thereby improving light transmittance while maintaining color display capability.
Solution Approach 2:
The patent creates a composite color filter structure by combining organic color filter materials with inorganic quantum dot particles. This composite material approach allows the color filter to simultaneously achieve color selection through the organic matrix and wavelength conversion through the quantum dots, resolving the contradiction between color display and light transmittance.
2Illumination intensity
If quantum dot particles are incorporated into the color filter, then light transmittance is improved, but device complexity increases
Solution Approach 1:
The patent merges the color filter function and quantum dot conversion function into a single integrated layer. Instead of adding separate components, the quantum dot particles are dispersed within the color filter matrix, combining multiple functions into one structure and minimizing device complexity while improving light transmittance.
Solution Approach 2:
The color filter layer is designed to perform multiple functions simultaneously: wavelength selection through the organic color filter materials and wavelength conversion through the embedded quantum dots. This multi-functionality approach improves light transmittance without requiring additional separate components, thereby avoiding increased device complexity.
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
Improves light transmittance of the color filter, enabling more efficient use of backlight and enhancing the display of full-color images by converting unwanted wavelengths to the required colors.
Implementation Method 1
Incorporation of quantum dot particles made of inorganic nano-materials within the color filter, which convert specific wavelengths of the backlight into the desired colors
Data Source
AI summary
A color filter includes a first filtering part and a number of first quantum dot particles formed in the first filtering part. A color of the first filtering part is a first primary color. The first quantum dot particles convert a light having a wavelength less than a wavelength of the first primary color to a light with the first primary color.