Rearview mirror assemblies

1. A rearview mirror assembly for a vehicle comprising:

an electro-optic mirror unit whose reflectivity is variable in response to an electrical voltage applied thereto;

at least one light sensor;

an electrical circuit for controlling operation of the mirror unit in response to the at least one light sensor;

a bracket for supporting the mirror unit from an interior portion of the vehicle;

said bracket connecting to said mirror unit via a ball and socket pivot assembly;

said pivot assembly including a plurality of electrical contacts and counter-contacts for supplying electrical power to said electrical circuit from a vehicle electrical system external to the mirror assembly, said power provided to said electrical circuit over a range of angular movement of said mirror unit relative to said bracket.

2. The assembly of claim 1 , wherein said pivot assembly includes a ball member and a socket member, said ball member being fixed relative to said bracket and said socket member being fixed relative to said mirror unit.

3. The assembly of claim 2 , wherein said mirror unit is mounted on one side of a backplate and said socket member is disposed on the opposite side of said backplate from said mirror unit.

4. The assembly of claim 3 , wherein said ball member includes a convex surface, said electrical contacts being disposed at said convex surface.

5. The assembly of claim 3 wherein said backplate comprises an electrically non-conductive material having a conductive lead frame embedded therein.

6. The assembly of claim 5 , wherein said electrical circuit is mounted on the said opposite side of said backplate.

7. The assembly of claim 6 wherein said electrical circuit is electrically connected to said counter-contacts by spring contacts extending from the lead frame out of said backplate.

8. The assembly of claim 5 wherein said counter-contacts comprise spring contacts extending from said lead frame.

9. The assembly of claim 2 , further including a mirror housing containing the said mirror unit, wherein said socket member is disposed on said mirror housing.

10. The assembly of claim 2 , wherein said ball member comprises a convex surface, said electrical contacts being disposed on said convex surface.

11. The assembly of claim 10 , wherein said counter-contacts comprise spring fingers biased into engagement with said electrical contacts.

12. The assembly of claim 1 , wherein said mirror unit is mounted on one side of a backplate, said backplate comprising an electrically non-conductive material having a conductive lead frame embedded therein.

13. The assembly of claim 12 , wherein said lead frame includes a plurality of contacts extending from opposite edges of said backplate and making electrical contact with opposite edges of said mirror unit for allowing said electrical circuit to control the operation of said mirror unit.

14. The assembly of claim 1 , wherein said pivot assembly includes a ball member and a socket member, and wherein a part-spherical external surface of said ball member is rotatable within a complementary part-spherical internal surface of said socket member, and wherein said electrical contacts are disposed on the part-spherical external surface of said ball member and said counter-contacts are disposed on the part-spherical internal surface of said socket member.

15. The assembly of claim 14 , wherein said mirror unit is mounted on one side of a backplate and said socket member is mounted on the opposite side of said backplate from said mirror unit.

16. The assembly of claim 1 wherein said electro-optic unit comprises an electrochromic mirror unit.

17. A rearview mirror assembly for a vehicle comprising:

an electro-optic mirror unit whose reflectivity is variable in response to an electrical voltage applied thereto, said electro-optic mirror unit comprising an electrochromic mirror unit;

at least one light sensor;

an electrical circuit for controlling operation of the mirror unit in response to the at least one light sensor;

a bracket for supporting the mirror unit from an interior portion of the vehicle;

said bracket connecting to said mirror unit via a ball and socket pivot assembly, said pivot assembly including a ball member and a socket member, said ball member being fixed relative to said bracket and said socket member being fixed relative to said mirror unit;

said pivot assembly including a plurality of electrical contacts and counter-contacts for supplying electrical power to said electrical circuit from a vehicle electrical system external to the mirror assembly, said power provided to said electrical circuit over a range of angular movement of said mirror unit relative to said bracket.

18. A rearview mirror assembly for a vehicle comprising:

an electro-optic mirror unit whose reflectivity is variable in response to an electrical voltage applied thereto, said electro-optic mirror unit comprising an electrochromic mirror unit;

at least one light sensor;

an electrical circuit for controlling operation of the mirror unit in response to the at least one light sensor;

a bracket for supporting the mirror unit from an interior portion of the vehicle;

said bracket connecting to said mirror unit via a ball and socket pivot assembly, said pivot assembly including a ball member and a socket member;

said pivot assembly including a plurality of electrical contacts and counter-contacts for supplying electrical power to said electrical circuit from a vehicle electrical system external to the mirror assembly, said power provided to said electrical circuit over a range of angular movement of said mirror unit relative to said bracket;

said mirror unit being mounted on one side of a backplate and said socket member being disposed on the opposite side of said backplate from said mirror unit.