Liquid Crystal Coherent Transparent Display Screen
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Solution Overview
Problem
Conventional liquid crystal transparent display systems suffer from low light transmittance due to the presence of polarizers and optical filters, limiting their effectiveness in displaying images on transparent mediums.
Innovation Solution
The liquid crystal coherent transparent display screen and liquid crystal-laser transparent display system replace polarizers and optical filters with an optical resonant microcavity formed by partial reflectors, enhancing light transmittance and utilizing a laser light source for improved brightness and color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers and optical filters are used to achieve brightness modulation and color display, then display function is improved, but light transmittance deteriorates (transmittance ranges from 5% to 10%)
Solution Approach 1:
The patent removes polarizers and optical filters from the conventional liquid crystal display structure, extracting only the essential liquid crystal layer between transparent substrates. This extraction eliminates the main sources of light loss while retaining the core display functionality through direct control of liquid crystal optical properties.
Solution Approach 2:
The patent changes the operating parameters by using the liquid crystal layer's inherent birefringence and refractive index properties without requiring polarizing elements. By controlling the liquid crystal's molecular orientation through electric fields, the system achieves brightness modulation and color display while maintaining high light transmittance.
2Illumination intensity
If polarizers and optical filters are removed to increase light transmittance, then light transmittance is improved, but brightness modulation capability deteriorates
Solution Approach 1:
The liquid crystal layer serves multiple functions simultaneously: it acts as both the light modulating element and the display medium. By controlling the liquid crystal's refractive index and birefringence through electric fields, the system achieves brightness modulation, contrast control, and color display without requiring separate polarizers or filters, thereby maintaining high transmittance while ensuring reliable display performance.
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 increases light transmittance and achieves high brightness and contrast by modifying the refractive index of the liquid crystal layer, allowing for efficient brightness modulation and display without the need for polarizers or optical filters.
Implementation Method 1
a liquid crystal layer, arranged between the first alignment layer and the second alignment layer
Implementation Method 2
a liquid crystal state and a polarized state of the light are modified through an electric field
Implementation Method 3
a first partial reflector, wherein the first electrode layer and the first partial reflector are stacked between the first alignment layer and the first substrate
Data Source
AI summary
A liquid crystal coherent transparent display screen and a liquid crystal-laser transparent display system are provided. The polarizer, the analyzer and the optical filters in the conventional technology are replaced by an optical resonant microcavity formed by the first partial reflector and the second partial reflector in the liquid crystal coherent transparent display screen, thereby improving the light transmittance of liquid crystal transparent display.