Perovskite Color Filter for Display Devices
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Solution Overview
Problem
Conventional LCD displays face challenges in expanding color gamut without degrading transmittance, leading to increased power consumption when enhancing backlight brightness, and quantum dot displays are expensive with complex synthesis methods.
Innovation Solution
Incorporating Perovskite materials in color filters for display devices, which allows for easy control of emission color and reduces production costs by eliminating the need for passivation layers and using wet-chemical printing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the color purity of a color filter is improved to expand color gamut, then color gamut is expanded, but transmittance of the color filter is degraded
Solution Approach 1:
The patent changes the material parameter from conventional color filter materials to Perovskite materials, which have unique optical properties allowing high color purity while maintaining high transmittance. The Perovskite crystal structure enables precise control of light absorption and emission characteristics without the trade-off present in conventional filters.
Solution Approach 2:
The patent employs composite Perovskite material structures combining different elements (such as organic-inorganic hybrid Perovskites) to achieve both high color purity and high transmittance simultaneously. The composite nature allows tuning of optical properties to resolve the contradiction between color gamut expansion and light transmission.
2Illumination intensity
If the brightness of a backlight source is enhanced to compensate for transmittance degradation, then brightness is improved, but power consumption of the LCD is increased
Solution Approach 1:
The patent extracts the need for high backlight brightness by introducing Perovskite color filters with inherently high transmittance. Since the Perovskite filters allow more light to pass through naturally, the system can maintain brightness with lower backlight intensity, thereby eliminating the need to compensate with increased power consumption.
3Manufacturing precision
If quantum dots are used to achieve pure color emission, then color purity is improved, but production cost increases and synthesis complexity increases
Solution Approach 1:
The patent replaces expensive quantum dots with Perovskite materials that can be manufactured more economically. Perovskites can be synthesized using simpler, lower-cost methods such as solution processing and wet-chemical techniques, making them a cost-effective alternative while maintaining high color purity performance.
Solution Approach 2:
The patent substitutes the complex controlled synthesis process required for quantum dots with simpler wet-chemical printing and deposition methods for Perovskites. This replacement of sophisticated synthesis mechanisms with easier chemical processing methods reduces both cost and complexity while achieving similar or superior optical results.
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
The Perovskite color filters achieve a large color gamut without affecting display quality, decrease production costs, and maintain low power consumption by generating predefined colors in response to incident light, improving color purity and brightness.
Implementation Method 1
Quantum dots have distinctive characteristics: they can emit light when subjected to an electrical or optical stimulation so as to produce bright light and present a pure color... the color of the emitted light is determined by the composition material and the size of quantum dots
Data Source
AI summary
The present disclosure pertains to a color filter for a display device, which has at least one color filter element for generating a predefined color in response to incident light, wherein the at least one color filter element includes a Perovskite material.