Sealants and conductive busbars for chromogenic devices
First Claim
1. An electrooptic variable reflectance mirror for vehicles comprising front and rear spaced elements, said front element having a rear surface with a layer of transparent conductive coating disposed thereon, and said rear element having a front surface comprising at least one layer of conductive coating, wherein 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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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.
9 Citations
18 Claims
- 1. An electrooptic variable reflectance mirror for vehicles comprising front and rear spaced elements, said front element having a rear surface with a layer of transparent conductive coating disposed thereon, and said rear element having a front surface comprising at least one layer of conductive coating, wherein 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, wherein one of the said conductive layers is transparent, and further comprising perimeter busbars deposited on or connected to the said conductive layers, wherein the said busbars comprises conductive nanofibers.
- 11. A chromogenic window or a mirror comprising a variable transmission medium between two conductive layers, wherein one of the said conductive layers is transparent, and further comprising perimeter busbars deposited on or connected to the said conductive layers, wherein the said busbars 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 said window or said mirror comprises a variable transmission medium between two conductive layers, wherein one of the said conductive layers is transparent, and further comprises conductive perimeter busbars deposited on or connected to the said conductive layers, wherein the said method includes deposition of a busbar material using a composition comprising of conductive particles or metal compound particles, and further 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 said window or said mirror comprises a variable transmission medium between two conductive layers, wherein one of the said conductive layers is transparent, and further comprises perimeter busbars on or connected to the said conductive layers, wherein the method comprises a processing step wherein a spray process is used to deposit a formulation comprising preformed solid particles wherein the said particles imparts conductivity to the busbars.
- 17. A method to form a chromogenic window or a mirror wherein said window or said mirror comprises a variable transmission medium between two conductive layers, wherein one of the said conductive layers is transparent, and further comprises conductive perimeter busbars deposited on or connected to the said conductive layers, and the method further comprises bonding of electrical connectors to the said busbars using a solid state welding process.
Specification