Vehicle rearview mirror system

• US 20020041442A1
• Filed: 03/14/2001
• Published: 04/11/2002
• Est. Priority Date: 03/14/2000
• Status: Abandoned Application

• Current Assignee: Donnelly Corporation (Magna International Incorporated)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: Witt, Frank A.
• Application Number:
  US09/808,428
• Publication Number:
  US 20020041442A1
• Time in Patent Office: Days
• US Class Current: 359/603
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors

Abstract

A vehicular rearview mirror system includes a rearview mirror assembly including a reflective element and a housing for the reflective element. The reflective element includes a plurality of reflective element segments. At least one of the reflective element segments is an electro-optic variable reflective element having a partial reflectance level that varies as a function of a drive signal. The vehicular rearview mirror system further includes directional light-sensing means for producing an output that varies as a function of a direction that light is sensed by the light-sensing means. The output is provided as a drive signal to the at least one of the reflective element segments. In this manner, the at least one of the reflective element segments has a partial reflectance level that is a function at least of direction that light is sensed by the light-sensing means.

Claims

1. A vehicular rearview mirror system, comprising:

a rearview mirror assembly, said rearview mirror assembly comprising a reflective element and a mirror housing for said reflective element;

said reflective element comprising a plurality of reflective element segments, at least one of said reflective element segments comprising an electro-optic variable reflective element having a partial reflectance level that varies as a function of a drive signal; and

directional light-sensing means for producing an output that varies as a function of a direction that light is sensed by said light-sensing means, said output providing a drive signal to said at least one of said reflective element segments, wherein said at least one of said reflective element segments has a partial reflectance level that is a function at least of direction that light is sensed by said light-sensing means.

2. The vehicle rearview mirror system in claim 1 wherein at least two of said reflective element segments comprise electro-optic variable reflective elements and wherein said light sensor provides separate drive signals to said at least two of said reflective element segments, wherein said at least two of said reflective element segments can be at different partial reflectance levels.

3. The vehicle rearview mirror system in claim 1 wherein said reflective element segments are vertical segments that are horizontally arranged across said interior reflective element.

4. The vehicle rearview mirror system in claim 3 wherein said reflective element segments have a substantially uniform horizontal dimension.

5. The vehicle rearview mirror system in claim 3 wherein said reflective element segments have horizontal dimensions that are a function of the location of the particular segment in the interior reflective element.

6. The vehicle rearview mirror system in claim 1 wherein said reflective element segments are horizontal segments that are vertically arranged across said interior reflective element.

7. The vehicle rearview mirror system in claim 6 wherein said reflective element segments have a substantially uniform vertical dimension.

8. The vehicle rearview mirror system in claim 6 wherein said reflective element segments have vertical dimensions that are a function of the location of the particular segment in the interior reflective element.

9. The vehicle rearview mirror system in claim 1 wherein said reflective element segments are combination vertical and horizontal segments that are horizontally and vertically arranged across said interior reflective element.

10. The vehicle rearview mirror system in claim 1 wherein said reflective element segments comprise at least three segments.

11. The vehicle rearview mirror system in claim 10 wherein said reflective element segments comprise at least five segments.

12. The vehicle rearview mirror system in claim 1 wherein said control coordinates the reflectance level of said segments.

13. The vehicle rearview mirror system in claim 12 wherein said control coordinates the reflectance levels of adjacent said segments to vary from each other by no more than a given amount.

14. The vehicle rearview mirror system in claim 13 wherein said given amount is 10%.

15. The vehicle rearview mirror system in claim 1 wherein said directional light sensor comprises a directional lens and a photo sensor array.

16. The vehicle rearview mirror system in claim 15 wherein said directional lens comprises a cylindrical plano-lens.

17. The vehicle rearview mirror system in claim 15 wherein said photo sensor array is comprised of overlapping photo sensor units.

18. The vehicle rearview mirror system in claim 1 further including another rearview mirror assembly comprising another reflective element and another mirror housing for said another reflective element, said another reflective element comprising a plurality of other reflective element segments, at least one of said other reflective element segments comprising an electro-optic variable reflective element having a partial reflectance level that varies as a function of a drive signal, and wherein said at least one of said other reflective element segments having a partial reflectance level that varies as a function of a direction that light is sensed by said directional light-sensing means.

19. The vehicle rearview mirror system in claim 18 wherein said rearview mirror assembly comprises an interior rearview mirror assembly and said reflective element comprises an interior reflective element and further wherein said another rearview mirror assembly comprises an exterior rearview mirror assembly and said another reflective element comprises an exterior reflective element.

20. The vehicle rearview mirror system in claim 19 wherein said exterior rearview mirror assembly comprises a driver side mirror assembly.

21. The vehicle rearview mirror system in claim 19 wherein said exterior rearview mirror assembly comprises a passenger side mirror assembly.

22. The vehicle rearview mirror system in claim 1 wherein said rearview mirror assembly comprises an exterior rearview mirror assembly and said reflective element comprises an exterior reflective element.

23. The vehicle rearview mirror system in claim 22 wherein said exterior rearview mirror assembly comprises a driver side mirror assembly.

24. The vehicle rearview mirror system in claim 22 wherein said exterior rearview mirror assembly comprises a passenger side mirror assembly.

25. The vehicle rearview mirror system in claim 18 wherein said directional light-sensing means comprises a directional light sensor at said rearview mirror assembly and another directional light sensor at said another rearview mirror assembly.

26. The vehicle rearview mirror system in claim 18 wherein said other reflective element segments are vertical segments that are horizontally arranged across said exterior reflective element.

27. The vehicle rearview mirror system in claim 18 wherein said other reflective element segments are horizontal segments that are vertically arranged across said exterior reflective element.