LCD light-reducing apparatus, and vehicle smart mirror using same
A light attenuation, smart mirror technology, applied in optical observation devices, vehicle components, optics, etc., can solve the problems of unstable light absorption rate, complex processes, etc., and achieve the effect of low power consumption
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[0029] The present invention utilizes an LCD containing dichroic dyes and chiral substances on a nematic liquid crystal with a negative dielectric anisotropy to realize a transmission type and a reflection type light attenuation device.
[0030] In more detail, the LCD light attenuating device of the present invention is composed of one or more LCD cells and a power supply unit that supplies an electric field to the LCD cells. Each of the LCD cells described above includes a liquid crystal layer formed between two substrate layers. Each liquid crystal layer includes: a nematic liquid crystal that can be rearranged according to the strength of an electric field, is transparent, and has a negative dielectric anisotropy; a positive dichroic positive dichroic dye, which is mixed with the above-mentioned nematic liquid crystal to absorb light of a certain wavelength; and chiral material, which makes the above-mentioned nematic liquid crystal have a twisted structure.
[0031] Acco...
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