Environmentally safe electrochromic devices and assemblies

• US 8,599,467 B2
• Filed: 01/29/2009
• Issued: 12/03/2013
• Est. Priority Date: 01/31/2008
• Status: Active Grant

• Current Assignee: Ajjer, LLC
• Original Assignee: Ajjer, LLC
• Inventors: Agrawal, Anoop, Cronin, John P., Tonazzi, Juan Carlos L.
• Primary Examiner(s): Martinez, Joseph P
• Application Number:
  US12/865,688
• Publication Number:
  US 20110051219A1
• Time in Patent Office: 1,769 Days
• Field of Search: 359/265, 359/272, 349/189, 349/190, 349/153, 349/154
• US Class Current: 359/265
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors

Abstract

This invention recognizes the hazards of materials used to make electrochromic devices and the resulting mirror assemblies for automotive use. The invention provides novel ways to reduce these hazards and to manufacture these mirrors using renewable resources and smaller environmental footprint.

Claims

1. An electrochromic mirror or a window comprising a rear element and a transparent front element being sealably bonded together along the perimeter with a sealant in a spaced apart relationship to define a chamber;

wherein the said sealant system further comprises of a gap for the electrolyte to be introduced into the said chamber and a dam close to the said gap.

2. An electrochromic mirror or a window as in claim 1 where the said sealant and the dam are made out of the same material.

3. An electrochromic mirror or a window comprising a rear element and a transparent front element being sealably bonded together along the perimeter with a perimeter sealant in a spaced apart relationship to define a chamber;

wherein the said perimeter sealant system further comprises of a main perimeter seal and a dam, wherein the dam is associated with the gap in the main seal, and the said gap is associated with the electrolyte to be introduced into the said chamber, wherein the said dam resists the penetration of the plug sealant into the chamber during the operation of plugging of the said gap.

4. An electrochromic mirror as in claim 3, wherein in the perimeter sealant system and the dam and the perimeter sealant are made out of the same material or different materials.

5. An electrochromic mirror as in claim 4, wherein the dam may or may not contact with the main sealant.

6. An electrochromic mirror or a window comprising a rear element and a transparent front element being sealably bonded together along the perimeter with a perimeter sealant in a spaced apart relationship to define a chamber;

wherein the said perimeter sealant system further comprises of a main perimeter seal, a gap in the said seal and a dam near the said gap, and both the dam and the main sealant are formed so that they are cured or solidified after the assembly of the two substrates.

7. An electrochromic mirror or a window as in claim 6, wherein both the dam and the main perimeter seal are formed in one operation.

8. An electrochromic mirror or a window as in claim 6, wherein both the dam and the main perimeter seal are of the same height.

9. An electrochromic mirror or a window as in claim 6, wherein the width of the main seal is different from the width of the dam.