Transmittance Variable Device
A transmittance, variable technology, applied in instruments, polarizing elements, glasses/goggles, etc., can solve problems such as crosstalk, and achieve the effect of excellent transmittance variable characteristics
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Embodiment 1
[0180] A device was fabricated using a high-magnification 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 deposition of 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. An alignment film was formed by rubbing a polyimide-based horizontal alignment film (SE-7492, Nissan) with a thickness of about 300 nm with a rubbing cloth, wherein the rubbing direction (alignment direction) and the slow axis direction of the SRF substrate were set is about 0 degrees (fabrication of the upper base (observer side base)). The lower substrate is fabricated in the same manner. In manufacturing the lower substrate, the rubbing direction (alignme...
Embodiment 2
[0183] A device was fabricated in the same manner as in Example 1, except that the alignment direction (rubbing direction) was about 30 degrees clockwise from the slow axis of the SRF substrate when the upper and lower substrates were formed. The upper and lower substrates were arranged with the same cell gap as in Example 1 so that the alignment films faced each other, and sealed after injecting the same liquid crystal material as in Example 1 to manufacture a device. In the arrangement, the upper and lower substrates are arranged such that their alignment directions are parallel to each other, but the rubbing directions are opposite to each other. The obtained transmittance variable layer (liquid crystal layer) was an STN mode liquid crystal layer with a twist angle of about 360 degrees. The applied chiral dopant (S811, Merck) has left-handedness, and thus with this arrangement, between the slow axis of the upper substrate (SRF substrate) measured along the twist direction o...
Embodiment 3
[0185] A device was fabricated in the same manner as in Example 1, except that the alignment direction (rubbing direction) was about 50 degrees clockwise from the slow axis of the SRF substrate when the upper and lower substrates were formed. The upper and lower substrates were arranged with the same cell gap as in Example 1 so that the alignment films faced each other, and sealed after injecting the same liquid crystal material as in Example 1 to manufacture a device. In the arrangement, the upper and lower substrates are arranged such that their alignment directions are parallel to each other, but the rubbing directions are opposite to each other. The obtained transmittance variable layer (liquid crystal layer) was an STN mode liquid crystal layer with a twist angle of about 360 degrees. The applied chiral dopant (S811, Merck) has left-handedness, and thus with this arrangement, between the slow axis of the upper substrate (SRF substrate) measured along the twist direction o...
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Abstract
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