Dichroic Dye Liquid Crystal Microcapsules for High Transmittance Displays
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Solution Overview
Problem
Transparent display devices that remove polarizers to enhance transmittance experience drastically lowered contrast compared to traditional liquid crystal display devices, affecting application performance.
Innovation Solution
Incorporating a liquid crystal layer with dichroic dye liquid crystal microcapsules in a display panel, where the dichroic dye effectively absorbs incident light to lower dark state transmittance and enhance contrast, comprising a mixture of dichroic dye, liquid crystal material, and polymer networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarizer is removed to enhance transmittance, then transmittance is improved, but contrast is drastically lowered
Solution Approach 1:
The patent removes the polarizer from the traditional liquid crystal display structure to eliminate the limitation on light transmittance. By extracting this component, the display achieves higher transmittance while using alternative mechanisms (dichroic dye and polymer network liquid crystal) to maintain contrast performance.
Solution Approach 2:
The patent changes the optical parameters by introducing dichroic dye with specific absorption characteristics and using polymer network liquid crystal with controlled transmittance properties. The dichroic dye absorbs incident light effectively in the dark state, while the polymer network liquid crystal provides voltage-dependent transmittance variation, together maintaining contrast without the polarizer.
2Illumination intensity
If polymer network liquid crystal is used to vary gray scale by transmittance variation, then transmittance is enhanced, but contrast is drastically lowered
Solution Approach 1:
The patent combines dichroic dye with polymer network liquid crystal to create a composite liquid crystal composition. The dichroic dye provides strong light absorption in the dark state, while the polymer network liquid crystal provides voltage-controlled transmittance modulation. This composite approach maintains contrast performance while achieving high transmittance in the bright state.
Solution Approach 2:
The dichroic dye acts as an intermediary substance that enhances light absorption in the dark state, compensating for the loss of contrast that would otherwise occur when removing the polarizer. It mediates between the high transmittance requirement and the contrast maintenance requirement.
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 display panel achieves improved optical characteristics by effectively absorbing incident light during no signal transmission, thereby enhancing contrast and optical performance.
Implementation Method 1
the dichroic dye in the dichroic dye liquid crystal microcapsules can more effectively absorb incident light such that when no signal is transmitted in the display panel, the dichroic dye polymer network liquid crystal can effectively absorb the incident light
Data Source
AI summary
The embodiment of the present invention discloses a display panel, a manufacturing method thereof, and a display device. In the embodiment of the present invention, a liquid crystal layer of the display panel includes a plurality of dichroic dye liquid crystal microcapsules, a dichroic dye in dichroic dye liquid crystal microcapsules can absorb incident light such that when the display panel performs no signal transmission, the dichroic dye polymer network liquid crystal can effectively absorb incident light to lower a dark state transmittance of the display panel to further enhance contrast of the display panel and improve optical characteristics thereof.