Dye-Doped Liquid Crystal Panel Eliminates Polarizers
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Solution Overview
Problem
Conventional liquid crystal display panels have low optical efficiency due to the inclusion of polarizers and color filters, which reduce light intensity and increase manufacturing costs.
Innovation Solution
A color liquid crystal display panel incorporating a dichroic dye in the liquid crystal material to absorb specific wavelengths of light, eliminating the need for polarizers and color filters, and using multiple layers of dye-doped liquid crystal cells to achieve color display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers and color filters are included in the liquid crystal display panel, then color displaying is achieved, but light intensity is reduced and optical efficiency is low
Solution Approach 1:
The patent extracts and removes the polarizer and color filter components from the conventional LCD structure. Instead of using these separate optical components, the invention incorporates dichroic dye directly into the liquid crystal layer, eliminating the need for polarizers and color filters while maintaining color display capability and improving light transmission.
Solution Approach 2:
The patent merges the functions of the liquid crystal, color filtering, and polarization control into a single integrated layer by dissolving dichroic dye in the liquid crystal material. This combination allows the liquid crystal layer to simultaneously perform molecular reorientation for light control and selective wavelength absorption for color display, simplifying the overall structure.
2Ease of manufacture
If polarizers and color filters are included in the liquid crystal display panel, then color displaying is achieved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and removes the polarizer and color filter components from the conventional LCD structure. Instead of using these separate optical components, the invention incorporates dichroic dye directly into the liquid crystal layer, eliminating the need for polarizers and color filters while maintaining color display capability and improving light transmission.
Solution Approach 2:
The dichroic dye-infused liquid crystal layer performs multiple functions simultaneously: it acts as the liquid crystal medium for electro-optic modulation, serves as the color filter through selective wavelength absorption, and provides polarization control. This multi-functionality reduces the number of separate components needed, simplifying manufacturing and reducing costs.
3Illumination intensity
If conventional color filter method is used, then full color displaying is achieved, but light intensity is reduced to 33% of original level
Solution Approach 1:
The patent merges the functions of the liquid crystal, color filtering, and polarization control into a single integrated layer by dissolving dichroic dye in the liquid crystal material. This combination allows the liquid crystal layer to simultaneously perform molecular reorientation for light control and selective wavelength absorption for color display, simplifying the overall structure.
Solution Approach 2:
The patent extracts and removes the polarizer and color filter components from the conventional LCD structure. Instead of using these separate optical components, the invention incorporates dichroic dye directly into the liquid crystal layer, eliminating the need for polarizers and color filters while maintaining color display capability and improving light transmission.
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
Enhances light transmittance and optical efficiency while reducing manufacturing costs and backlighting brightness by selectively absorbing light across different wavelength ranges.
Implementation Method 1
The liquid crystal display panel incorporates a dichroic dye in a liquid crystal material to absorb specific wavelengths of light
Implementation Method 2
The dichroic dye of each of the liquid crystal cells absorbs a light of a predetermined range of wavelength
Implementation Method 3
application of electricity is selectively carried out to control the liquid crystal molecules to change direction in order to refract out light emitting from the backlight module
Implementation Method 4
control the liquid crystal molecules to change direction in order to refract out light
Implementation Method 5
bonding members bonding the plurality of layers of liquid crystal cell
Data Source
AI summary
A color liquid crystal display panel includes: a plurality of layers of liquid crystal cells that are arranged parallel to each other and bonding members bonding the plurality of layers of liquid crystal cells. Each of the liquid crystal cells includes a thin-film transistor substrate, a package substrate, and a dye-doped liquid crystal layer sealed between the thin-film transistor substrate and the package substrate. The dye-liquid crystal layer includes a liquid crystal material, a dichroic dye, and a chiral reagent. The dichroic dye of each of the liquid crystal cells absorbs light of a predetermined range of wavelength. The plurality of layers of liquid crystal cell respectively absorbs lights of different ranges of wavelength. The color liquid crystal display panel requires no conventionally used polarizer and color filter, so that the manufacture cost of and the requirement for backlighting brightness by the liquid crystal display panel can both be reduced.