Display Device Microcavity Optical Filter Segmentation
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face challenges in achieving high photo-efficiency and wide viewing angles while maintaining low power consumption, particularly due to limitations in light management and color purity.
Innovation Solution
The implementation of a microcavity structure comprising a first optical filter layer and a second optical filter layer, along with a color filter partitioned into regions, enhances light amplification and interference, improving photo-efficiency and color gamut by selectively passing or blocking specific wavelengths and recycling light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional LCD light management is used, then device simplicity is maintained, but photo-efficiency is insufficient
Solution Approach 1:
The optical filter layer is segmented into multiple regions (first region, second region, third region) with different optical characteristics. Each region selectively transmits or blocks specific wavelengths, enabling enhanced photo-efficiency through spatial segmentation of optical functions rather than using a single complex filter.
Solution Approach 2:
Different regions of the optical filter layer are assigned different optical properties tailored to specific wavelength ranges. The first region transmits first wavelengths while blocking second wavelengths, the second region transmits second wavelengths while blocking third wavelengths, and the third region transmits third wavelengths while blocking fourth wavelengths, creating local optical quality optimization.
2Manufacturing precision
If conventional color filter is used, then manufacturing simplicity is maintained, but color purity and viewing angle are insufficient
Solution Approach 1:
The color filter is divided into multiple regions corresponding to different color channels (red, green, blue). Each region is positioned to receive light from specific sub-pixels and applies selective wavelength transmission to enhance color purity while maintaining compatibility with existing LCD manufacturing processes.
Solution Approach 2:
The optical filter layer introduces wavelength-selective transmission parameters that modify the spectral characteristics of transmitted light. By controlling which wavelengths pass through each region, the system achieves enhanced color purity and viewing angle without fundamentally changing the manufacturing approach.
3Adaptability or versatility
If wider viewing angle is achieved through conventional methods, then viewing angle improves, but grayscale changes occur
Solution Approach 1:
The optical filter layer provides local optical compensation by selectively transmitting wavelengths that maintain grayscale consistency across different viewing angles. Each region is designed to preserve the luminance and color characteristics of the underlying liquid crystal pixels while enabling wider viewing angles.
Solution Approach 2:
The optical filter layer acts as an intermediary between the liquid crystal layer and the viewer. It mediates the light transmission by selectively passing certain wavelengths while blocking others, thereby maintaining grayscale accuracy and color purity across wide viewing angles without requiring complex liquid crystal alignment.
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 significantly improves photo-efficiency by up to 170-300% compared to conventional displays, while maintaining low power consumption and providing a wide viewing angle without grayscale changes, effectively addressing the limitations of conventional LCDs.
Implementation Method 1
enhances light amplification and interference, improving photo-efficiency and color gamut by selectively passing or blocking specific wavelengths
Implementation Method 2
a microcavity structure comprising a first optical filter layer and a second optical filter layer, along with a color filter partitioned into regions, enhances light amplification and interference
Implementation Method 3
recycling light
Data Source
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AI summary
A display device includes a light source which provides a first light, a color filter including a plurality of quantum dots which absorbs the first light and emits at least one of a second light and a third light that are different from the first light, a first optical filter layer disposed on the color filter, and a second optical filter layer disposed between the light source and the color filter. The first optical filter blocks at least a part of the first light, and the second optical filter transmits at least a part of the first light and reflects at least a part of the second light and the third light.