Electro-optic reflective element assembly

• US 7,310,177 B2
• Filed: 02/22/2007
• Issued: 12/18/2007
• Est. Priority Date: 09/20/2002
• Status: Expired due to Term

• Current Assignee: Donnelly Corporation (Magna International Incorporated)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: McCabe, Ian A., Varaprasad, Desaraju, Habibi, Hamid, Lynam, Niall R.
• Primary Examiner(s): THOMPSON, TIMOTHY J
• Application Number:
  US11/709,625
• Publication Number:
  US 20070153356A1
• Time in Patent Office: 299 Days
• Field of Search: 359/237, 359/238, 359/241, 359/242, 359/245, 359/267, 359/270
• US Class Current: 359/265
• CPC Class Codes: B60Q 1/2665 on rear-view mirrors lighting devices for vehicle interior on or for rear-view mirrors B60Q3/258
• CPC Class Codes: B60Q 1/34 for indicating change of drive direction B60Q1/22 takes precedence
• CPC Class Codes: B60Q 2400/40 Welcome lights, i.e. specific or existing exterior lamps to assist leaving or approaching the vehicle
• CPC Class Codes: B60R 1/04 mounted inside vehicle B60R1/025, B60R1/08 take precedence
• CPC Class Codes: B60R 1/06 mounted on vehicle exterior B60R1/025, B60R1/08 take precedence
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: B60R 1/1207 with lamps; with turn indicators
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 5/0875 the reflecting layers comprising two or more metallic layers
• CPC Class Codes: G02B 5/10 with curved faces
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 1/163 Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor

Abstract

A rearview mirror assembly for a vehicle includes an electro-optic reflective element with an overhang region at an edge region of a first substrate that extends beyond a corresponding edge region of a second substrate. A transparent electrical conductor is disposed at a second surface of the first substrate and a mirror reflector is disposed at a third surface of the second substrate. The mirror reflector includes a tab portion that at least partially encompasses an edge dimension of the second substrate. A non-conductive seal is disposed between the first and second substrates and encompasses at least a portion of the mirror reflector and at least a portion of a non-conductive perimeter region of the third surface. A first electrical connector connects to the transparent electrical conductor via the overhang region and a second electrical connector is in electrical connection with the tab portion of the mirror reflector.

Claims

1. A rearview mirror assembly for a vehicle, said rearview mirror assembly comprising:

an electro-optic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when a vehicle is equipped with said rearview mirror assembly;

said electro-optic reflective element comprising an electro-optic medium disposed between a first substrate and a second substrate;

said first substrate being closer to the driver of the vehicle than said second substrate when the vehicle is equipped with said rearview mirror assembly;

said first substrate having a first surface and a second surface;

said first surface being closer to the driver of the vehicle than said second surface when the vehicle is equipped with said rearview mirror assembly;

said second substrate having a third surface and a fourth surface;

said third surface being closer to the driver of the vehicle than said fourth surface when the vehicle is equipped with said rearview mirror assembly;

an overhang region at an edge region of said first substrate that extends beyond a corresponding edge region of said second substrate;

a transparent electrical conductor disposed at said second surface of said first substrate;

an electrically conductive mirror reflector disposed at said third surface of said second substrate;

said mirror reflector including a tab portion that at least partially encompasses an edge dimension of said second substrate;

said second substrate having a non-conductive perimeter region at said third surface and devoid of said mirror reflector except at said tab portion;

a non-conductive seal disposed between said first and second substrates and encompassing at least a portion of said mirror reflector and at least a portion of said non-conductive perimeter region;

at least one hiding layer disposed around a perimeter region of said second surface of said first substrate;

said at least one hiding layer being substantially non-transparent so as to render the presence of said non-conductive seal substantially not noticeable to a viewer directly viewing said rearview mirror assembly when the vehicle is normally equipped with said rearview mirror assembly;

a first electrical connector in electrical connection with said transparent electrical conductor, said first electrical connector connecting to said transparent electrical conductor via said overhang region; and

a second electrical connector in electrical connection with said tab portion of said mirror reflector.

2. The rearview mirror assembly of claim 1, wherein said second electrical connector electrically connects to said tab portion of said mirror reflector via said fourth surface of said second substrate.

3. The rearview mirror assembly of claim 2, wherein said first electrical connector electrically connects to said transparent electrical conductor via said fourth surface of said second substrate.

4. The rearview mirror assembly of claim 1, wherein said first electrical connector electrically connects to said transparent electrical conductor via said fourth surface of said second substrate.

5. The rearview mirror assembly of claim 1, wherein said at least one hiding layer renders the presence of said first electrical connector substantially not noticeable to a viewer directly viewing said rearview mirror assembly when the vehicle is normally equipped with said rearview mirror assembly.

6. The rearview mirror assembly of claim 1, wherein said tab portion of said mirror reflector extends substantially across said edge dimension of said second substrate.

7. The rearview mirror assembly of claim 6, wherein said second electrical connector electrically connects to said tab portion of said mirror reflector via said fourth surface of said second substrate.

8. The rearview mirror assembly of claim 1, wherein said mirror reflector comprises a metallic layer.

9. The rearview mirror assembly of claim 8, wherein said metallic layer comprises at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum.

10. The rearview mirror assembly of claim 1, wherein said mirror reflector includes a transparent electrical conductor.

11. The rearview mirror assembly of claim 1 further comprising another overhang region at another edge region of said first substrate that extends beyond a corresponding other edge region of said second substrate.

12. The rearview mirror assembly of claim 11, wherein said other edge region of said first substrate is generally opposite said edge region of said first substrate.

13. The rearview mirror assembly of claim 11, wherein said second electrical connector connects to said tab portion of said mirror reflector behind said other overhang region.

14. The rearview mirror assembly of claim 1, wherein said first electrical connector comprises at least one pin that extends from a portion of said reflective element generally at said fourth surface, said at least one pin extending toward said second surface of said first substrate to electrically connect to said transparent electrical conductor.

15. The rearview mirror assembly of claim 1 including a conductive material disposed at said overhang region of said first substrate, said first electrical connector being in electrical connection with said transparent electrical conductor via said conductive material.

16. The rearview mirror assembly of claim 1, wherein said overhang region is at one of an upper edge region and a lower edge region of said first substrate and relative to the ground when the vehicle is equipped with said rearview mirror assembly.

17. The rearview mirror assembly of claim 1, wherein said at least one hiding layer comprises at least one of a metal layer, a metal compound layer, a chromium metal layer, a chrome oxide layer, a nickel oxide layer, a silver oxide layer, a frit layer and a conductive epoxy layer.

18. The rearview mirror assembly of claim 1, wherein said at least one hiding layer comprises a conductive hiding layer that is in electrical connection with said transparent electrical conductor, said first electrical connector being electrically connected to said transparent electrical conductor via said conductive hiding layer.

19. The rearview mirror assembly of claim 1, wherein said transparent electrical conductor is disposed rearward of said at least one hiding layer and between said at least one hiding layer and said first electrical connector.

20. The rearview mirror assembly of claim 1, wherein said at least one hiding layer comprises a metal layer.

21. The rearview mirror assembly of claim 1, wherein said at least one hiding layer comprises a metal compound layer.

22. The rearview mirror assembly of claim 1, wherein said at least one hiding layer comprises a chromium metal layer.

23. The rearview mirror assembly of claim 1, wherein said non-conductive perimeter region is at least partially along and proximate to said edge region of said second substrate generally at said overhang region.

24. The rearview mirror assembly of claim 1, wherein said rearview mirror assembly comprises an interior rearview mirror assembly adapted for mounting to an interior portion of the vehicle.

25. The rearview mirror assembly of claim 1, wherein said rearview mirror assembly comprises an exterior rearview mirror assembly adapted for mounting to an exterior portion of the vehicle.

26. The rearview mirror assembly of claim 1, wherein said electro-optic reflective element comprises an electrochromic reflective element comprising an electrochromic medium disposed between said first substrate and said second substrate.

27. A rearview mirror assembly for a vehicle, said rearview mirror assembly comprising:

an electro-optic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when a vehicle is equipped with said rearview mirror assembly;

said electro-optic reflective element comprising an electro-optic medium disposed between a first substrate and a second substrate;

said first substrate being closer to the driver of the vehicle than said second substrate when the vehicle is equipped with said rearview mirror assembly;

said first substrate having a first surface and a second surface;

said first surface being closer to the driver of the vehicle than said second surface when the vehicle is equipped with said rearview mirror assembly;

said second substrate having a third surface and a fourth surface;

said third surface being closer to the driver of the vehicle than said fourth surface when the vehicle is equipped with said rearview mirror assembly;

an overhang region at an edge region of said first substrate that extends beyond a corresponding edge region of said second substrate;

a transparent electrical conductor disposed at said second surface of said first substrate;

an electrically conductive mirror reflector disposed at said third surface of said second substrate;

said mirror reflector including a tab portion that at least partially encompasses an edge dimension of said second substrate and that extends substantially across said edge dimension of said second substrate;

said second substrate including a non-conductive perimeter region at said third surface and devoid of said mirror reflector except at said tab portion;

a non-conductive seal disposed between said first and second substrates and encompassing at least a portion of said mirror reflector and at least a portion of said non-conductive perimeter region;

a first electrical connector in electrical connection with said transparent electrical conductor, said first electrical connector connecting to said transparent electrical conductor via said overhang region; and

a second electrical connector in electrical connection with said tab portion of said mirror reflector via said fourth surface of said second substrate.

28. The rearview mirror assembly of claim 27 further comprising at least one hiding layer disposed around a perimeter region of said second surface of said first substrate, said at least one hiding layer being substantially non-transparent so as to render the presence of said non-conductive seal substantially not noticeable to a viewer directly viewing said rearview mirror assembly when the vehicle is normally equipped with said rearview mirror assembly.

29. The rearview mirror assembly of claim 28, wherein said at least one hiding layer comprises a conductive hiding layer that is in electrical connection with said transparent electrical conductor, said first electrical connector being electrically connected to said transparent electrical conductor via said conductive hiding layer.

30. The rearview mirror assembly of claim 28, wherein said transparent electrical conductor is disposed rearward of said at least one hiding layer and between said at least one hiding layer and said first electrical connector.

31. The rearview mirror assembly of claim 28, wherein said at least one hiding layer comprises at least one of a metal layer, a metal compound layer, a chromium metal layer, a chrome oxide layer, a nickel oxide layer, a silver oxide layer, a frit layer and a conductive epoxy layer.

32. The rearview mirror assembly of claim 28, wherein said at least one hiding layer renders the presence of said first electrical connector substantially not noticeable to a viewer directly viewing said rearview mirror assembly when the vehicle is normally equipped with said rearview mirror assembly.

33. The rearview mirror assembly of claim 27, wherein said first electrical connector electrically connects to said transparent electrical conductor via said fourth surface of said second substrate.

34. The rearview mirror assembly of claim 27, wherein said mirror reflector comprises a metallic layer.

35. The rearview mirror assembly of claim 34, wherein said metallic layer comprises at least one of (i) silver, (ii) aluminum, (iii) an alloy of silver, and (iv) an alloy of aluminum.

36. The rearview mirror assembly of claim 27 including a conductive material disposed at said overhang region of said first substrate, said first electrical connector being in electrical connection with said transparent electrical conductor via said conductive material.

37. The rearview mirror assembly of claim 27, wherein said non-conductive perimeter region is at least partially along and proximate to said edge region of said second substrate generally at said overhang region.

38. The rearview mirror assembly of claim 27, wherein said rearview mirror assembly comprises an interior rearview mirror assembly adapted for mounting to an interior portion of the vehicle.

39. The rearview mirror assembly of claim 27, wherein said rearview mirror assembly comprises an exterior rearview mirror assembly adapted for mounting to an exterior portion of the vehicle.

40. The rearview mirror assembly of claim 27, wherein said electro-optic reflective element comprises an electrochromic reflective element comprising an electrochromic medium disposed between said first substrate and said second substrate.

41. A rearview mirror assembly for a vehicle, said rearview mirror assembly comprising:

an electrochromic reflective element, said reflective element providing a rearward field of view to a driver of a vehicle when a vehicle is equipped with said rearview mirror assembly;

said electrochromic reflective element comprising an electrochromic medium disposed between a first substrate and a second substrate;

said first substrate being closer to the driver of the vehicle than said second substrate when the vehicle is equipped with said rearview mirror assembly;

said first substrate having a first surface and a second surface;

said first surface being closer to the driver of the vehicle than said second surface when the vehicle is equipped with said rearview mirror assembly;

said second substrate having a third surface and a fourth surface;

said third surface being closer to the driver of the vehicle than said fourth surface when the vehicle is equipped with said rearview mirror assembly;

an overhang region at an edge region of said first substrate that extends beyond a corresponding edge region of said second substrate;

a transparent electrical conductor disposed at said second surface of said first substrate;

an electrically conductive mirror reflector disposed at said third surface of said second substrate;

said mirror reflector including a tab portion that at least partially encompasses an edge dimension of said second substrate;

said second substrate having a non-conductive perimeter region at said third surface and devoid of said mirror reflector except at said tab portion;

a non-conductive seal disposed between said first and second substrates and encompassing at least a portion of said mirror reflector and at least a portion of said non-conductive perimeter region;

a metallic hiding layer disposed around a perimeter region of said second surface of said first substrate;

said metallic hiding layer being substantially non-transparent so as to render the presence of said non-conductive seal substantially not noticeable to a viewer directly viewing said rearview mirror assembly when the vehicle is normally equipped with said rearview mirror assembly;

a first electrical connector in electrical connection with said transparent electrical conductor, said first electrical connector connecting to said transparent electrical conductor via said overhang region; and

a second electrical connector in electrical connection with said tab portion of said mirror reflector.

42. The rearview mirror assembly of claim 41, wherein said tab portion of said mirror reflector extends substantially across said edge dimension of said second substrate.

43. The rearview mirror assembly of claim 42, wherein said second electrical connector electrically connects to said tab portion of said mirror reflector via said fourth surface of said second substrate.

44. The rearview mirror assembly of claim 41, wherein said metallic hiding layer comprises a conductive metallic hiding layer that is in electrical connection with said transparent electrical conductor, said first electrical connector being electrically connected to said transparent electrical conductor via said conductive metallic hiding layer.

45. The rearview mirror assembly of claim 41, wherein said transparent electrical conductor is disposed rearward of said metallic hiding layer and between said metallic hiding layer and said first electrical connector.

46. The rearview mirror assembly of claim 41, wherein said rearview mirror assembly comprises an interior rearview mirror assembly adapted for mounting to an interior portion of the vehicle.

47. The rearview mirror assembly of claim 41, wherein said rearview mirror assembly comprises an exterior rearview mirror assembly adapted for mounting to an exterior portion of the vehicle.