Mirror reflective element assembly including electronic component

• US 7,446,924 B2
• Filed: 10/01/2004
• Issued: 11/04/2008
• Est. Priority Date: 10/02/2003
• Status: Expired due to Fees

• Current Assignee: Donnelly Corporation (Magna International Incorporated)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: Wight, David C., Schofield, Kenneth, Kramer, Mark E.
• Primary Examiner(s): Allen; Stephone B.
• Assistant Examiner(s): Chapel; Derek S
• Application Number:
  US10/956,749
• Publication Number:
  US 20050099693A1
• Time in Patent Office: 1,495 Days
• Field of Search: 359/265, 359/604
• US Class Current: 359/267
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes 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: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/2054 Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics

Abstract

A reflective element assembly for a mirror assembly of a vehicle includes a reflective element substrate and a conductive trace or layer disposed at a rear surface of the reflective element substrate. A non-conductive layer is applied at the conductive layer and covers at least a portion of the conductive layer and leaves at least some portions of the conductive layer exposed. At least one circuitry component is applied to at least one of the portions of the conductive layer. The circuitry component may include a carbon ink resistor printed onto the conductive trace.

Claims

1. A reflective element for a mirror assembly of a vehicle, said reflective element comprising:

a substrate having a rear surface and a front surface;

a reflective coating disposed at least one of said rear surface and said front surface of said substrate;

at least one electronic circuitry component applied to at least one portion of said rear surface of said substrate so that said at least a portion of said substrate functions as a circuit board; and

wherein said reflective element comprises an electrochromic reflective element assembly, said substrate comprising a rear substrate and said electrochromic reflective element assembly comprising a front substrate and an electrochromic medium disposed between said front and rear substrates, and wherein said rear surface of said rear substrate comprises said reflective coating and an insulating epoxy layer on said reflective coating, a conductive layer being applied to said insulating epoxy layer.

2. The reflective element of claim 1, wherein a conductive layer is disposed at least a portion of said rear surface of said rear substrate and includes busbar rails along opposite edges of said rear surface of said rear substrate, a front substrate busbar being connected between a portion or edge of said front substrate and one of said busbar rails, and a rear substrate busbar being connected between a portion or edge of said rear substrate and the other of said busbar rails.

3. The reflective element of claim 1, wherein said at least one electronic circuitry component comprises a carbon ink resistor printed onto the conductive layer disposed at said rear surface of said rear substrate.

4. The reflective element of claim 1, wherein said at least one electronic circuitry component comprises a display element integrally formed on said rear substrate.

5. The reflective element of claim 4, wherein said display element comprises a liquid crystal display element.

6. The reflective element of claim 1, further comprising the conductive layer disposed at a portion of said rear surface of said rear substrate, wherein said conductive layer is applied substantially over said rear surface of said rear substrate and limits shattering of said rear substrate.

7. The reflective element of claim 1, wherein said at least one electronic circuitry component comprises at least one proximity sensor positioned along a portion of said rear surface of said rear substrate, said at least one proximity sensor being operable to detect a presence of a person'"'"'s finger at or near said mirror assembly.

8. The reflective element of claim 7, wherein said at least one proximity sensor is operable to detect the presence of the person'"'"'s finger at or near an icon on the mirror casing or bezel.

9. The reflective element of claim 8, wherein said at least one electronic circuitry component is operable to control a display element in response to said detection of the person'"'"'s finger.

10. The reflective element of claim 8, wherein said at least one electronic circuitry component is operable to toggle an accessory in response to said detection of the person'"'"'s finger.

11. The reflective element of claim 1, further comprising a conductive layer disposed at a portion of said rear surface of said rear substrate and a non-conductive layer applied at said conductive layer and covering at least a portion of said conductive layer and leaving at least one portion of said conductive layer exposed for conductively connecting said at least one electronic circuitry component to said conductive layer.

12. A method of manufacturing a reflective element for an interior rearview mirror assembly of a vehicle, said method comprising:

providing a substrate having a front surface and a rear surface, said substrate having a reflective layer disposed at one of said front and rear surfaces for viewing by a driver of the vehicle when the mirror assembly is installed to the vehicle;

applying at least one electronic circuitry component to said rear surface of said substrate; and

wherein said reflective element comprises an electrochromic reflective element assembly, wherein providing a substrate comprises providing a rear substrate having a rear surface, a front substrate, and an electrochromic medium sandwiched between said front and rear substrates, and wherein said rear surface of said rear substrate includes said reflective layer thereon, said method including applying an insulating epoxy layer on said reflective layer, said at least one electronic circuitry component being applied to said insulating epoxy layer.

13. The method of claim 12, further comprising applying busbar rails along opposite edges of said rear surface of said rear substrate, said method including connecting a front substrate busbar between a portion or edge of said front substrate and one of said busbar rails and connecting a rear substrate busbar between a portion or edge of said rear substrate and the other of said busbar rails.

14. The method of claim 12, including applying and curing a conductive trace on said at least one portion of said rear surface of said rear substrate.

15. The method of claim 14, wherein curing said conductive trace comprises curing an epoxy seal around said electrochromic medium during the same curing process.

16. The method of claim 12, wherein applying at least one electronic circuitry component comprises printing a carbon ink resistor onto said rear surface of said substrate.

17. The method of claim 12, wherein applying at least one electronic circuitry component comprises integrally forming a display element on said rear surface of said substrate.

18. The method of claim 17, wherein integrally forming a display element on said rear surface of said substrate comprises integrally forming a liquid crystal display element on said rear surface of said substrate.

19. The method of claim 12, including applying a conductive layer substantially over said rear surface of said substrate to limit shattering of said substrate.

20. The method of claim 12, wherein applying at least one electronic circuitry component comprises applying at least one proximity sensor along a portion of said rear surface of said substrate, said at least one proximity sensor being operable to detect a presence of a person'"'"'s finger at or near an icon on the mirror casing or bezel.

21. The method of claim 20, wherein said at least one electronic circuitry component is operable to control a display element in response to said detection of the person'"'"'s finger.

22. The method of claim 20, wherein said at least one electronic circuitry component is operable to toggle an accessory in response to said detection of the person'"'"'s finger.

23. The method of claim 12, further comprising:

applying a non-conductive layer to said transparent glass substrate to cover at least some of said conductive trace and to leave at least one portion of said conductive trace exposed for conductively connecting said at least one electronic circuitry component to said conductive trace.