Display Device Color Adjusting Layer Quantum Dot Brightness
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in achieving enhanced brightness and larger viewing angles due to the significant light blocking by color filter layers, which results in decreased light output and unsatisfactory performance at larger angles.
Innovation Solution
A display device configuration that includes a blue light source and a display panel with a color adjusting layer containing wavelength transformation materials, such as phosphor particles, which convert blue light into red and green light, and a blue filter layer that allows blue light to pass through while absorbing non-blue light, reducing light loss and improving optical behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color filter layer is used to produce colored light, then color output is achieved, but light intensity and brightness are significantly reduced
Solution Approach 1:
The patent replaces the conventional color filter layer (which blocks most light) with a quantum dot layer that converts blue light to red and green light through photoluminescence. This substitution changes the mechanism from light blocking to light conversion, dramatically improving light transmission efficiency and brightness while maintaining color accuracy.
Solution Approach 2:
The patent changes the optical parameters of the display system by using quantum dots with specific size ranges (2-6 nm) that emit at specific wavelengths when excited by blue light. By controlling the size and composition of quantum dots, the patent optimizes the conversion efficiency and spectral characteristics, achieving high brightness with minimal light loss.
2Adaptability or versatility
If a conventional color filter layer is used, then color separation is achieved, but viewing angle performance deteriorates
Solution Approach 1:
The patent replaces the conventional color filter layer with a quantum dot layer that emits light isotropically in all directions. This substitution eliminates the directional light blocking characteristics of color filters, enabling consistent brightness and color output across wide viewing angles while maintaining high light efficiency.
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 enhances brightness and viewing angle by minimizing light loss and ensuring consistent color output across different angles, providing better display performance compared to conventional systems.
Implementation Method 1
Each color excitation unit includes a plurality of wavelength transformation materials. When the blue light enters the color excitation units, the wavelength transformation materials are excited to generate non-blue light, i.e. light of color other than blue.
Implementation Method 2
The blue filter layer allows only blue light to pass therethrough and absorbs non-blue light.
Data Source
AI summary
A display device, a manufacturing method thereof, and a color adjusting method used thereon are provided. The display device includes a blue light source and a display panel which includes a substrate having a color adjusting layer, a blue filter layer, and an inner polarizer disposed thereon. The color adjusting layer includes a plurality of color excitation units, wherein each color excitation unit contains a plurality of wavelength transformation materials. The blue filter layer allows only blue light to pass therethrough and absorbs other color light. The blue light passes through the inner polarizer and the blue filter layer to reach the color excitation units. The blue light further excites the wavelength transformation materials to generate different color light. A part of the different color light is transmitted to and absorbed by the blue filter layer.