초록 ▼

Electrochromic device and method. In one disclosed embodiment, an electrochromic coating is applied to a light transmissive substrate, and a first control voltage is generated in accordance with the amount of light impinging upon the substrate. That control voltage is applied to the electrochromic c

Electrochromic device and method. In one disclosed embodiment, an electrochromic coating is applied to a light transmissive substrate, and a first control voltage is generated in accordance with the amount of light impinging upon the substrate. That control voltage is applied to the electrochromic coating to decrease the transmittance of the substrate as the light increases. Ambient light conditions are monitored to provide a second control voltage which is applied to the electrochromic coating to decrease the transmittance of the substrate when the ambient light falls below a predetermined level, e.g. at night. In other disclosed embodiments, the electrochromic coating is applied to the lenses of a pair of glasses and to a lamp shade, with photovoltaic cells for controlling the transmittance of the coating in accordance with the amount of impinging light.

대표청구항 ▼

[ What is claimed is:] [1.] An electrochromic device, comprising a light transmissive substrate, an electrochromic coating on the substrate for varying the transmittance of the substrate in accordance with an applied voltage, a photovoltaic cell for applying a first control voltage to the electrochr

[ What is claimed is:] [1.] An electrochromic device, comprising a light transmissive substrate, an electrochromic coating on the substrate for varying the transmittance of the substrate in accordance with an applied voltage, a photovoltaic cell for applying a first control voltage to the electrochromic coating in response to light impinging upon the cell so that the transmittance of the substrate decreases as the light becomes brighter, and means responsive to ambient light conditions for applying a second control voltage to the electrochromic coating to reduce the transmittance of the substrate when the ambient light falls below a predetermined level.