US 12,441,245 B2
Universal sensor system for auto dimming control for different spectral outputs
Barry K. Nelson, Howard City, MI (US); John S. Anderson, Holland, MI (US); Mario F. Saenger Nayver, Holland, MI (US); Steven M. Childs, Grand Haven, MI (US); George A. Neuman, Holland, MI (US); and Henry A. Luten, Zeeland, MI (US)
Assigned to GENTEX CORPORATION, Zeeland, MI (US)
Filed by GENTEX CORPORATION, Zeeland, MI (US)
Filed on Aug. 12, 2022, as Appl. No. 17/886,834.
Claims priority of provisional application 63/260,416, filed on Aug. 19, 2021.
Prior Publication US 2023/0054465 A1, Feb. 23, 2023
Int. Cl. B60R 1/08 (2006.01); B32B 9/04 (2006.01); B60R 1/12 (2006.01); G01J 1/04 (2006.01); G01J 1/42 (2006.01); G02B 1/02 (2006.01); G02F 1/01 (2006.01); G02B 5/28 (2006.01)
CPC B60R 1/088 (2013.01) [B32B 9/04 (2013.01); B60R 1/12 (2013.01); G01J 1/0488 (2013.01); G01J 1/4204 (2013.01); G02B 1/02 (2013.01); G02F 1/0121 (2013.01); B32B 2250/05 (2013.01); B32B 2250/42 (2013.01); B32B 2307/418 (2013.01); B32B 2551/00 (2013.01); B60R 2001/1223 (2013.01); G02B 5/281 (2013.01); G02F 2203/48 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A rearview system comprising:
a light sensor assembly having:
a photosensor operable to detect light and generate a signal based, at least in part, on the detected light;
a dichroic filter in optical communication with the photosensor and operable to filter light, the dichroic filter configured to substantially inhibit light having a wavelength of greater than a predetermined wavelength from transmitting therethrough, wherein the dichroic filter comprises a plurality of filter layers, the dichroic filter being configured to generate sensor responses in the photosensor similar to the response of a human eye; and
a rearview assembly having an electro-optic element comprising an electro-optic medium and operable to variably change the amount of light passing through the electro-optic medium based, at least in part, on the signal,
wherein the dichroic filter comprises a first portion comprising a plurality of filter layers and capable of substantially inhibiting the passage of light having a wavelength of greater than 650 nm through the dichroic filter and a second portion comprising a plurality of filter layers and capable of substantially inhibiting the passage of light having a wavelength of less than 400 nm through the dichroic filter.