Color Conversion Panel with Blue Light Blocking Filter
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Solution Overview
Problem
Display devices, such as liquid crystal and organic light emitting diode displays, experience light loss due to the polarization layer and color filter, and existing color conversion display panels face inefficiencies in light transmission and conversion.
Innovation Solution
A color conversion display panel with a substrate featuring a blue light blocking filter and a transmission portion, including regions with scatterers and convex portions, is used between the substrate and the liquid crystal layer, optimizing light transmission and conversion by reducing total reflection at interfaces with different refractive indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a color conversion display panel uses semiconductor nanocrystals to improve color reproducibility, then color purity is improved, but light loss occurs in the polarization layer and color filter
Solution Approach 1:
The patent extracts and removes the color filter layer from the display device structure, replacing it with a color conversion panel that uses semiconductor nanocrystals. This eliminates the light loss that occurs in traditional color filters while maintaining color reproducibility through quantum dot color conversion
Solution Approach 2:
The patent changes the material composition and optical parameters of the display layers, specifically using semiconductor nanocrystals with controlled size and shape to achieve precise color conversion. The nanocrystal dimensions are optimized to control light absorption and emission wavelengths for high color purity
2Measurement precision
If light passes through multiple layers including polarization layer and color filter, then color selection is achieved, but light transmission efficiency decreases
Solution Approach 1:
The patent removes the color filter layer entirely and replaces it with a color conversion panel using semiconductor nanocrystals. This extraction eliminates the light transmission losses associated with multiple absorbing layers while maintaining accurate color selection through quantum confinement effects
Solution Approach 2:
The patent introduces semiconductor nanocrystals as an intermediary material that converts blue light from the backlight into other colors (green, red) through quantum confinement. This intermediary approach allows color selection without requiring multiple absorbing layers, thereby improving light transmission efficiency
3Stability of the object's composition
If a transmission portion includes scatterers to improve light distribution, then uniform luminance is improved, but device complexity increases
Solution Approach 1:
The patent uses a porous or scattering layer in the transmission portion that contains scatterers to distribute light uniformly. This porous structure provides a simple yet effective means of achieving luminance uniformity without requiring complex optical elements
Solution Approach 2:
The transmission portion is segmented into different regions with varying scatterer densities or types. This segmentation allows localized control of light scattering to achieve uniform luminance across the display while keeping each individual region relatively simple in structure
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 light-emitting efficiency and color purity by minimizing light loss and increasing the amount of light emitted, while maintaining high color reproducibility and uniform luminance.
Implementation Method 1
A blue light blocking filter is disposed between the substrate and the color conversion portion
Implementation Method 2
The color conversion portion includes a semiconductor nanocrystal
Implementation Method 3
Color conversion display panels may use semiconductor nanocrystals, such as quantum dots, to provide the display device with high color reproducibility
Implementation Method 4
The transmission portion includes a first region including a scatterer
Implementation Method 5
optimizing light transmission and conversion by reducing total reflection at interfaces with different refractive indices
Implementation Method 6
reducing total reflection at interfaces with different refractive indices
Implementation Method 7
reducing total reflection at interfaces with different refractive indices
Data Source
AI summary
A color conversion display panel includes a substrate. A color conversion portion is disposed on the substrate. The color conversion portion includes a semiconductor nanocrystal. A transmission portion is disposed on the substrate. A blue light blocking filter is disposed between the substrate and the color conversion portion. The blue light blocking filter includes a first convex portion that protrudes toward the substrate. The transmission portion includes a first region including a scatterer and a second region including a second convex portion that protrudes toward the substrate.