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US 5,675,438 AGranted
Automatic antiglare mirror
AssigneeMurakami Corporation
InventorsMitsuyoshi Nagao, Hidenori Sato
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AssigneeMurakami Corporation
InventorsMitsuyoshi Nagao, Hidenori Sato
Estimating the term…
An automatic antiglare mirror for a vehicle with its reflectivity being variably controlled by an electrochromic element includes a rear light detection circuit for detecting quantity of light in the rear of the vehicle, a coloration amount control circuit for controlling an amount of coloration the electrochromic element and a response speed control circuit for controlling response speed of the electrochromic element. The coloration amount control circuit performs control of the amount of coloration in such a manner that, when quantity of rear light is smaller, the amount of coloration of the electrochromic element is smaller whereas, when the quantity of rear light is larger, the amount of coloration of the electrochromic element is larger. The response speed control circuit performs control of the response speed in such a manner that, when the quantity of rear light is smaller, the response speed of the electrochromic element in a color imparting direction is lower whereas, when the quantity of rear light is larger, the response speed of the electrochromic element in the color imparting direction is higher.
An automatic antiglare mirror including an electrochromic element wherein its reflectivity is variably controlled by driving the electrochromic element by a pulse voltage and changing a duty factor of the pulse voltage in response at least to quantity of rear light so that, when quantity of rear light is smaller, the amount of coloration of the electrochromic element is smaller whereas, when quantity of rear light is larger, the amount of coloration of the electrochromic element is larger, said automatic antiglare mirror comprising reflectivity change ratio changing means for changing the ratio of change in the reflectivity to the duty factor of the pulse voltage so that, when a duty factor in a color imparting direction is smaller, the ratio of change in the reflectivity to the duty factor is smaller;
An automatic antiglare mirror including an electrochromic element wherein its reflectivity is variably controlled by driving the electrochromic element by a pulse voltage and changing duty factor of the pulse voltage in response at least to quantity of rear light so that, when quantity of rear light is smaller, the amount of coloration of the electrochromic element is smaller whereas, when quantity of rear light is larger, the amount of coloration of the electrochromic element is higher, said automatic antiglare mirror comprising current value control means for controlling the current value of the pulse voltage driving the electrochromic element is such a manner that, when the quantity of rear light is smaller, the current value of the pulse voltage in a color imparting direction is smaller, whereas when quantity of rear light is larger, the current value is larger.
An automatic antiglare mirror including:
Dependencies are inferred from the claim text.