GLARE SENSING FOR REARVIEW MIRROR ASSEMBLY

A rearview mirror assembly includes an assembly housing and a connection member extending from a first end coupled to the assembly housing and a second end configured to be coupled to a vehicle interior. An optical stack is coupled to the assembly housing and includes an electro-optic element configured to switch between a substantially transmissive state and a substantially darkened state based on an applied voltage. A printed circuit board (“PCB”) is located within the connection member and in conductive communication with the electro-optic element for selectively transmitting the applied voltage. The rearview mirror assembly further includes a first light sensor and a light guide pipe. The light guide pipe includes a first guide end located in the assembly housing and proximate the optical stack and a second guide end located proximate the first light sensor, and the light guide pipe extends at least partially through the connection member.