Device having variable transmittance
A transmittance, variable technology, used in instruments, polarizing elements, glasses/goggles, etc., to solve problems such as crosstalk
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Embodiment 1
[0179] A device was fabricated using a highly stretched PET (polyethylene terephthalate) film substrate from Toyobo (SRF substrate, thickness: 80 μm, manufacturer: Toyobo, product name: TA044) as a polymer film substrate. First, an ITO (indium tin oxide) film (electrode layer) is deposited on one surface of the SRF substrate, and an alignment film is formed. After depositing the ITO film, the in-plane retardation of the applied SRF substrate was about 11,000 nm to 14,000 nm based on a wavelength of 550 nm. The alignment film was formed by rubbing a polyimide-based horizontal alignment film (SE-7492, Nissan) having a thickness of about 300 nm with a rubbing cloth, wherein when measured from the rubbing direction (alignment direction) to the twist direction of the liquid crystal layer , the rubbing direction (alignment direction) and the slow axis direction of the SRF substrate were set to about 57 degrees (manufacturing of the upper substrate (observer side substrate)). The lo...
Embodiment 2
[0185] Figure 10 A graph showing the results in the case where a device was fabricated in the same manner as in Example 1, but as a liquid crystal material, a chiral dopant (S811, Merck) was used in which a mixture of a chiral dopant (S811, Merck) and a GHLC mixture (MDA- 16-1235, Merck) blended liquid crystal material, the GHLC mixture comprises a liquid crystal compound with a positive dielectric constant anisotropy and a refractive index anisotropy (Δn) of 0.13 and a dichroic dye, and the thickness of the liquid crystal layer (ie, the cell gap) was 6 μm. In the graph, the X-axis is the twist angle (T) of the device, and the Y-axis is the device showing the smallest change in color coordinates when the change in color coordinates is measured in the same manner as in Test Example 1 at the relevant twist angle (T). The slow axis angle of the SRF base. The slow axis angle of the SRF substrate is the angle between the slow axis of the upper substrate (SRF substrate) and the a...
Embodiment 3
[0192] Figure 11 is a graph showing the results in the case where a device was produced in the same manner as in Example 1, but as the liquid crystal material, a chiral dopant (S811, Merck) was used in which a chiral dopant (S811, Merck) was blended with a GHLC mixture. A liquid crystal material, the GHLC mixture comprising a liquid crystal compound having a positive dielectric constant anisotropy and a refractive index anisotropy (Δn) of 0.076 and a dichroic dye (as dichroic dye Dichroic dye from LG Chem (Cyan, magenta, and the mixed dye of yellow three kinds of dyestuffs on JD 12, British color synthesis scheme) with the mixture that SHN-5011XX (JNC) blends with the concentration of about 1.8% by weight), and the thickness of liquid crystal layer ( That is, the cell gap) was 11 μm. In the graph, the X-axis is the twist angle (T) of the device, and the Y-axis is the device showing the smallest change in color coordinates when the change in color coordinates is measured in t...
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Abstract
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