Individual mirror control system
First Claim
1. A method for controlling the reflected light level of an inside electrochromic element and an outside electrochromic element of a vehicle to maintain a relatively constant reflected light level at a predetermined reference point where the vehicle includes a rear window made of privacy glass, the method comprising the steps of:
- varying the reflectivity of the mirrors in response to a sensed glare level and in accordance with a reflectance curve that establishes a relationship between sensed glare levels and desired reflectivity levels; and
providing a first reflectance curve for the inside electrochromic element and a second reflectance curve for the outside electrochromic element, the first reflectance curve having at least one different characteristic than the second reflectance curve to compensate for the privacy glass of the rear window.
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Accused Products
Abstract
A control system for a plurality of electrochromic elements, for example, used in automobiles, to control the glare of the IEC elements used as a rearview mirror (20) as well as the OEC elements (24, 26) used as sideview mirrors (24, 26). The IEC element and each of the OEC elements is provided with an individual drive circuit (21, 22). The drive circuits for the OEC'"'"'s elements may be customized to account for various factors such as the type of curvature as well as the size and shape. Since individual drive circuitry is provided for the IEC elements and each of the OEC elements, the reflectance of each of the electrochromic elements (20, 24, 26) can be relatively accurately controlled by way of glare signal from inside the automobile.
1 Citation
27 Claims
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1. A method for controlling the reflected light level of an inside electrochromic element and an outside electrochromic element of a vehicle to maintain a relatively constant reflected light level at a predetermined reference point where the vehicle includes a rear window made of privacy glass, the method comprising the steps of:
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varying the reflectivity of the mirrors in response to a sensed glare level and in accordance with a reflectance curve that establishes a relationship between sensed glare levels and desired reflectivity levels; and
providing a first reflectance curve for the inside electrochromic element and a second reflectance curve for the outside electrochromic element, the first reflectance curve having at least one different characteristic than the second reflectance curve to compensate for the privacy glass of the rear window. - View Dependent Claims (2, 3)
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4. A system for controlling reflectance levels of an inside rearview mirror and at least one outside rearview mirror of a vehicle having a rear window made of privacy glass, the system comprising:
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a glare sensor for sensing the level of light received from behind the vehicle, and for generating a glare signal representing the sensed light level; and
a control subsystem coupled to the inside and outside rearview mirrors and said glare sensor for receiving said glare signal and for generating electrical signals to control the reflectivity of the inside and outside rearview mirrors, said control subsystem controls the reflectivity of the inside rearview mirror differently than that of the at least one outside rearview mirror to compensate for the privacy glass of the rear window. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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15. A rear vision system for a vehicle, the vehicle having a rear window made of privacy glass, the rear vision system comprising:
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an outside rearview mirror for mounting to the outside of the vehicle, said outside mirror having a reflectivity that varies in response to an electrical control signal;
an inside rearview mirror for mounting to the inside of the vehicle to reflect light entering through the privacy glass of the rear window towards the eyes of the driver, said inside mirror having a reflectivity that varies in response to an electrical control signal;
a glare sensor for sensing the level of light received from behind the vehicle, and for generating a glare signal representing the sensed light level; and
a control subsystem coupled to said inside and outside rearview mirrors and said glare sensor for receiving said glare signal and for generating electrical signals to control the reflectivity of said inside and outside rearview mirrors, said control subsystem controls the reflectivity of said inside rearview mirror differently than that of said outside rearview mirror to compensate for the privacy glass of the rear window.
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27. An outside rearview mirror assembly for a vehicle, said outside rearview mirror assembly comprising:
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a housing for mounting to the exterior of the vehicle;
a mirror element mounted in said housing and having a reflectivity that varies in response to a variable electrical drive signal; and
a drive circuit mounted in said housing and coupled to the mirror element, said drive circuit generates, selectively varies, and supplies the drive signal to said mirror element in response to a glare signal received by said drive circuit from a glare sensor, the glare signal representing a glare level, said drive circuit selectively varies the drive signal as a function of the glare level based upon a reflectance curve.
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Specification