Electrochromic rearview mirror assembly incorporating a display/signal light
According to one embodiment of the present invention, an electrochromic rearview mirror assembly for a vehicle includes an electrochromic mirror having a variable reflectivity, a glare sensor for sensing levels of light directed towards the front element from the rear of the vehicle, an ambient sensor for sensing levels of ambient light, a display positioned behind the partially transmissive, partially reflective portion of the reflector for displaying information therethrough.
1. A rearview mirror assembly for use in a vehicle, comprising:
a first substantially transparent substrate and a second substrate secured in a spaced apart relationship with respect to one another to form a chamber there between, said second substrate comprising two or more layers disposed on a surface of said second substrate closest to said first substantially transparent substrate, said two or more layers comprising a layer of reflective material comprising silver and a first layer of substantially transparent conductive material less than approximately 300 Å comprising indium tin oxide located within said two or more layers at a location that is closer to said first substrate than said layer of reflective material, wherein the rearview mirror assembly is configured to have a b* value of less than approximately 15 and a C* value of less than approximately 20, the rearview mirror assembly is further configured to have a reflectivity of at least approximately 35 percent, and a transmittance of at least approximately 5 percent.
2. A rearview mirror assembly as in claim 1 further comprising a second layer of substantially transparent conductive material positioned between said layer of reflective material and said second substrate.
3. A rearview mirror assembly as in claim 2 wherein said second layer of substantially transparent conductive material comprises zinc.
4. A rearview mirror assembly as in claim 2 wherein said first and second layers of substantially transparent conductive material comprise indium tin oxide.
5. A rearview mirror assembly as in claim 1 wherein said first layer of substantially transparent conductive material comprises zinc.
6. A rearview mirror assembly as in claim 1 wherein said first layer of substantially transparent conductive material is indium tin oxide.
7. A rearview mirror assembly as in claim 1 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a display area is at least partially defined by a material proximate a fourth surface of said second substrate, and said material proximate said fourth surface of said second substrate comprises a pressure sensitive adhesive.
8. A rearview mirror assembly as in claim 7 wherein a transmittance characteristic of the rearview mirror element is higher for a spectral band associated with emissions from said display.
9. A rearview mirror assembly as in claim 1 further comprising at least one solution phase electrochromic medium within the chamber.
10. A rearview mirror assembly as in claim 1 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a region of said reflective material in proximity to said display exhibits a reflective gradient whereby a reflectivity of said reflective material gradually decreases through at least a portion of said region in proximity to said display.
11. A rearview mirror assembly as in claim 1 having a white light reflectivity of approximately 52 percent, and a white light transmission of about 30 percent.
12. A rearview mirror assembly as in claim 1 further comprising a flash layer placed over a surface of said reflective material closest to said first substantially transparent substrate.
13. A rearview mirror assembly as in claim 1 wherein said reflectivity is between approximately 60 percent and 65 percent.
14. A rearview mirror assembly as in claim 1 wherein said transmittance is between approximately 20 percent and 25 percent.
15. A rearview mirror assembly as in claim 1 wherein said reflective material is at least approximately 200 Å thick.
16. A rearview mirror assembly for use in a vehicle, comprising:
a first substantially transparent substrate; and
a second substrate secured in a spaced apart relationship with respect to one another to form a chamber there between, said second substrate comprising:
two or more layers disposed on a surface of said second substrate closest to said first substantially transparent substrate, said two or more layers comprising:
a layer of reflective material comprising silver; and
a first layer of substantially transparent conductive material less than approximately 300 Å located within said two or more layers at a location that is closer to said first substrate than said layer of reflective material and said first substantially transparent substrate;
wherein the rearview mirror assembly is configured to have a b* value of less than approximately 15 and a C* value of less than approximately 20, and the rearview mirror assembly is further configured to have a reflectivity of at least approximately 35 percent, and a transmittance of at least approximately 5 percent.
17. A rearview mirror assembly as in claim 16 further comprising a second layer of substantially transparent conductive material positioned between said layer of reflective material and said second substrate.
18. A rearview mirror assembly as in claim 17 wherein said second layer of substantially transparent conductive material comprises zinc.
19. A rearview mirror assembly as in claim 17 wherein said first and second layers of substantially transparent conductive material comprise indium tin oxide.
20. A rearview mirror assembly as in claim 16 wherein said first layer of substantially transparent conductive material comprises zinc.
21. A rearview mirror assembly as in claim 16 wherein said first layer of substantially transparent conductive material is indium tin oxide.
22. A rearview mirror assembly as in claim 16 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a display area is at least partially defined by a material proximate a fourth surface of said second substrate, and said material proximate said fourth surface of said second substrate comprises a pressure sensitive adhesive.
23. A rearview mirror assembly as in claim 22 wherein a transmittance characteristic of the rearview mirror assembly is higher for a spectral band associated with emissions from said display.
24. A rearview mirror assembly as in claim 16 further comprising at least one solution phase electrochromic medium within the chamber.
25. A rearview mirror assembly as in claim 16 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a region of said reflective material in proximity to said display exhibits a reflective gradient whereby a reflectivity of said reflective material gradually decreases through at least a portion of said region in proximity to said display.
26. A rearview mirror assembly as in claim 16 having a white light reflectivity of approximately 52 percent, and a white light transmission of about 30 percent.
27. A rearview mirror assembly as in claim 16 further comprising a flash layer placed over a surface of said reflective material closest to said first substantially transparent substrate.
28. A rearview mirror assembly as in claim 16 wherein said reflectivity is between approximately 60 percent and 65 percent.
29. A rearview mirror assembly as in claim 16 wherein said transmittance is between approximately 20 percent and 25 percent.
30. A rearview mirror assembly as in claim 16 , wherein said reflective material is at least approximately 200 Å thick.
31. A rearview mirror assembly for use in a vehicle, comprising:
a first substantially transparent substrate; and
a second substrate secured in a spaced apart relationship with respect to one another to form a chamber there between comprising at least one solution phase electrochromic medium within the chamber, said second substrate comprising:
two or more layers disposed on a surface of said second substrate closets to said first substantially transparent substrate, said two or more layers comprising:
a layer of reflective material comprising silver; and
a first layer of substantially transparent conductive material located within said two layers at a location that is closer to said first substrate than said layer of reflective material and said first substantially transparent substrate;
wherein the rearview mirror assembly is configured to have a b* value of less than approximately 15 and a C* value of less than approximately 20, and the rearview mirror assembly is further configured to have a reflectivity of at least approximately 35 percent, and a transmittance of at least approximately 15 percent.
32. A rearview minor assembly as in claim 31 further comprising a second layer of substantially transparent conductive material positioned between said layer of reflective material and said second substrate.
33. A rearview minor assembly as in claim 32 wherein said second layer of substantially transparent conductive material comprises zinc.
34. A rearview mirror assembly as in claim 32 wherein said first and second layers of substantially transparent conductive material comprise indium tin oxide, and said layer of reflective material comprises silver.
35. A rearview mirror assembly as in claim 31 wherein said first layer of substantially transparent conductive material comprises zinc.
36. A rearview minor assembly as in claim 31 wherein said first layer of substantially transparent conductive material is indium tin oxide.
37. A rearview mirror assembly as in claim 31 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a display area is at least partially defined b a material proximate a fourth surface of said second substrate, said material proximate said fourth surface of said second substrate comprises a pressure sensitive adhesive.
38. A rearview mirror assembly as in claim 37 wherein a transmittance characteristic of the rearview mirror element is higher for a spectral band associated with emissions from said display.
39. A rearview mirror assembly as in claim 31 further comprising a display positioned behind said second substrate with respect to a viewer, wherein a region of said reflective material in proximity to said display exhibits a reflective gradient whereby a reflectivity of said reflective material gradually decreases through at least a portion of said region in proximity to said display.
40. A rearview mirror assembly as in claim 31 having a white light reflectivity of approximately 52 percent, and a white light transmission of about 30 percent.
41. A rearview mirror assembly as in claim 31 further comprising a flash layer placed over a surface of said reflective material closest to said first substantially transparent substrate.
42. A rearview mirror assembly as in claim 31 wherein said reflectivity is between approximately 60 percent and 65 percent.
43. A rearview mirror assembly as in claim 31 wherein said transmittance is between approximately 20 percent and 25 percent.
44. A rearview mirror assembly as in claim 31 wherein said reflective material is at least 200 Å thick, and said first layer of substantially transparent conductive material is less than approximately 300 Å.