Quantum Dot Display Panel Removing Color Filters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display panels using OLEDs face reduced light emitting efficiency due to the need for color filters to convert white light into RGB colors, which absorb a significant amount of light, resulting in a 70% decrease in efficiency.
Innovation Solution
The use of quantum dot converters, such as red, green, and yellow light quantum dot converters, to convert blue light emitted from the electroluminescent layer into red, green, and yellow light without absorbing the original blue light, thereby eliminating the need for color filters and maintaining light emitting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color filters are used to convert white light into RGB colors, then color reproduction is achieved, but light emitting efficiency decreases by 70%
Solution Approach 1:
The patent removes the color filter layer from the display panel structure, extracting the harmful light-absorbing component that caused 70% efficiency loss. By eliminating this layer, the invention allows blue light from OLEDs to pass through directly to the quantum dot conversion layer without being absorbed by color filters.
Solution Approach 2:
The patent introduces quantum dot conversion layers as an intermediary between the OLED blue light source and the final RGB output. These quantum dot layers convert blue light to red and green wavelengths through photoluminescence, replacing the traditional color filter mechanism with a more efficient light conversion approach.
2Productivity
If quantum dot converters are used to convert blue light into RGB colors, then light emitting efficiency is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into the quantum dot conversion layer: it serves as both the color conversion medium and the light guiding structure. The quantum dot layers are integrated directly onto the OLED blue light emitting layer, merging the light source interface and color conversion functions into a single integrated structure.
Solution Approach 2:
The quantum dot conversion layers perform multiple functions simultaneously: they convert blue light to red and green wavelengths, guide light propagation, and serve as the interface between the OLED layer and the display output. This multi-functionality reduces the need for separate dedicated components for each function.
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 approach enhances light emitting efficiency and improves color reproducibility by directly converting blue light into desired colors without absorption, preventing a decrease in efficiency and ensuring accurate color representation.
Implementation Method 1
a light emitting layer 113 which emits blue light BLO
Implementation Method 2
quantum dot converters, such as red, green, and yellow light quantum dot converters, to convert blue light emitted from the electroluminescent layer into red, green, and yellow light
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The display panel (100) includes a light emitting device, three quantum dot converters (120, 130, 150) including quantum dot particles and converting light of a first color emitted from the light emitting device to light of a different color and emitting the light of the different color, a transmission part (140) transmitting light of the first color emitted from the light emitting device, and a transparent substrate (170) disposed on one side of the three quantum dot converters and the transmission part. One of the three quantum dot converters emits a white light to the transparent substrate.