Sealants and conductive busbars for chromogenic devices
First Claim
1. An electrooptic variable reflectance mirror for vehicles comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprises at least one layer of conductive coating, where the front and the rear elements are sealably bonded together by a spaced apart relationship defining a chamber there between, said chamber comprising an electrooptic medium, and wherein at least one of the rear surface of the said front element and the front surface of the said rear element has a conductive busbar deposited on its perimeter or a portion of its perimeter wherein the said busbar is formed comprising nanoparticles which impart conductivity to the said busbar, and the size of the said nanoparticles is less than 40 nm.
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Accused Products
Abstract
This invention discloses conductive busbars and sealants for electrooptic devices including electrochromic mirrors and windows. The conductive busbars are formed from materials comprising nanoparticles, and the sealants comprise of additives that promote a two phase morphology and use of adhesion promotion additives with crosslinkers. Methods to deposit busbars and then to connect these busbars to electrical connectors are also disclosed.
84 Citations
30 Claims
- 1. An electrooptic variable reflectance mirror for vehicles comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprises at least one layer of conductive coating, where the front and the rear elements are sealably bonded together by a spaced apart relationship defining a chamber there between, said chamber comprising an electrooptic medium, and wherein at least one of the rear surface of the said front element and the front surface of the said rear element has a conductive busbar deposited on its perimeter or a portion of its perimeter wherein the said busbar is formed comprising nanoparticles which impart conductivity to the said busbar, and the size of the said nanoparticles is less than 40 nm.
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10. A chromogenic window or a mirror comprising a variable transmission medium between two conductive layers, where one of the said conductive layer is transparent, and further comprise of perimeter busbars deposited on or connected to the said conductive layers, wherein the said busbar comprises conductive nanofibers.
- 11. A chromogenic window or a mirror comprising a variable transmission medium between two conductive layers, where one of the said conductive layer is transparent, and further comprise of perimeter busbars deposited on or connected to the said conductive layers, wherein the said busbar comprises conductive nanoparticles, wherein the size of the said nanoparticles is less than 40 nm.
- 13. A method of formation of a chromogenic window or a mirror wherein such window or a mirror comprise a variable transmission medium between two conductive layers, where one of the said conductive layer is transparent, and further comprise of conductive perimeter busbars deposited on or connected to the said conductive layers, wherein the said method includes deposition of the said busbar material using a composition comprising of conductive particles or metal compound particles, and includes a treatment of the deposited busbar material by optical radiation.
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16. A method to form a chromogenic window or a mirror wherein such window or a mirror comprise a variable transmission medium between two conductive layers, where one of the said conductive layer is transparent, and further comprise perimeter busbars on or connected to the said conductive layers, wherein the method comprises of a processing step where a spray process is used to deposit a formulation comprising preformed solid particles wherein the said particles imparts conductivity to the busbar.
- 17. A method to form a chromogenic window or a mirror wherein such window or a mirror comprise a variable transmission medium between two conductive layers, where one of the said conductive layer is transparent, and further comprise of conductive perimeter busbars deposited on or connected to the said conductive layers, and the method comprises bonding of the electrical connectors to the said busbars using a solid state welding process.
- 19. An electrooptic variable reflectance mirror for vehicles or an electrochromic window, comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprising at least one layer of conductive coating, where the front and the rear elements are sealably bonded at the perimeter by a spaced apart relationship defining a chamber there between, said chamber comprising an electrooptic medium, and wherein the said perimeter seal to bond the front and the rear substrate comprises an adhesion promotion material, wherein the said adhesion promotion material mixture comprises of at least one organo-silane and one crosslinker.
- 23. An electrooptic variable reflectance mirror for vehicles or an electrochromic window, comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprises at least one conductive coating, wherein the front and the rear elements are sealably bonded at the perimeter by a spaced apart relationship defining a chamber there between, said chamber comprising an electrooptic medium, and wherein the said perimeter seal to bond the front and the rear substrate comprises an adhesive material which comprises of at least one toughening agent.
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26. An electrooptic variable reflectance mirror for vehicles or an electrochromic window, comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprises at least one layer of conductive coating, wherein the front and the rear elements are sealably bonded at the perimeter by a spaced apart relationship defining a chamber there between, said chamber containing an electrooptic medium, and the said perimeter sealant having more than one opening, wherein at least one opening is used for filling the electrooptic medium into the said chamber and one opening for venting the gas from the chamber as it is being filled by the said electrooptic medium;
- and the geometry of the opening for the electrolyte filling is different as compared to the geometry the vent.
- View Dependent Claims (27, 28)
- 29. An electrooptic variable reflectance mirror for vehicles or an electrochromic window, comprising front and rear spaced elements, said rear surface of the front element having a layer of transparent conductive coating disposed thereon, and said front surface of said rear element comprising at least one layer of conductive coating, where the front and the rear elements are sealably bonded at the perimeter by a spaced apart relationship defining a chamber there between, said chamber comprising an electrooptic medium, wherein at least one of the said transparent conductive coating on the front element and the conductive coating on the rear element comprise of a zinc oxide coating doped with at least two additional metal oxides.
Specification