Vehicular rearview mirror elements and assemblies incorporating these elements

• US 9,041,998 B2
• Filed: 01/27/2014
• Issued: 05/26/2015
• Est. Priority Date: 09/30/2002
• Status: Expired due to Term

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Tonar, William L., Cammenga, David J., Anderson, John S., Poll, David L., Neuman, George A., Stray, Joel A., Busscher, Bradley L., Ypma, Kenton J.
• Primary Examiner(s): TRA, TUYEN Q
• Application Number:
  US14/164,505
• Publication Number:
  US 20140139901A1
• Time in Patent Office: 484 Days
• Field of Search: 359265-275, 345/105
• US Class Current: 359/267
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10321 Laminated safety glass or glazing containing liquid layers
• CPC Class Codes: B32B 17/10513 Electrochromic layer
• CPC Class Codes: B60R 1/08 involving special optical features, e.g. avoiding blind spots , e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors B60R1/025, B60R1/10 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: G02F 1/1533 structural features not otherwise provided for
• 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

The present invention relates to improved electro-optic rearview mirror elements and assemblies incorporating the same.

Claims

1. A vehicular rearview assembly having a front and a front peripheral portion, the assembly comprising:

an electro-optic mirror element comprising;

a first substrate comprising;

a first surface, and

a second surface;

a second substrate comprising;

a third surface,

a fourth surface, and

an electrode carried on at least the third surface;

a perimeter seal between the second and third surfaces, wherein the seal and the second and third surfaces define a cavity; and

an electro-optic medium disposed in the cavity; and

a housing structure having an aperture corresponding to the front portion of the vehicular rearview assembly, wherein at least a portion of the housing structure is configured to support the electro-optic mirror element,

wherein the first surface of the first substrate that is an outer surface of the electro-optic mirror element corresponds to the front of the vehicular rearview assembly, and

further wherein the second surface comprises a plurality of electrically conductive coatings disposed thereon and substantially isolated from one another by an isolation area that is substantially devoid of electrically conductive material.

2. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line having a width of about 0.005 inches to about 0.010 inches.

3. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line having a width of about 0.002 inches to about 0.004 inches.

4. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line having a width of less than or equal to about 0.002 inches.

5. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line having a width of less than or equal to about 1 μ

m.

6. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line configured such that the electrical resistance between the plurality of electrically conductive coatings is greater than 30 ohms.

7. The vehicular rearview assembly of claim 1, wherein the isolation area comprises an isolation line configured such that the electrical resistance between the plurality of electrically conductive coatings is greater than 100 ohms.

8. The vehicular rearview assembly of claim 1, wherein the electro-optic mirror element further comprises one or more of a textual feature, emblem, graphic, and artwork, and further wherein the isolation area is substantially incorporated into the one or more of the textual feature, emblem, graphic, and artwork.

9. The vehicular rearview assembly of claim 1, wherein the second surface further comprises a spectral filter disposed thereon and located over the perimeter seal, the spectral filter comprises a first and a second spectral filter portion substantially isolated from one another by the isolation area.

10. The vehicular rearview assembly of claim 9, wherein the isolation area is located over the perimeter seal.

11. The vehicular rearview assembly of claim 10, wherein the plurality of electrically conductive coatings is disposed directly on the second surface.

12. The vehicular rearview assembly of claim 10, wherein the first and second spectral filter portions are disposed directly on the second surface.

13. The vehicular rearview assembly of claim 10, wherein the spectral filter comprises an inboard edge and the isolation area is substantially aligned in close proximity to the inboard edge such that the isolation area is substantially hidden from view with respect to the front of the vehicular rearview assembly.