Electrochromic window with integrated bus bars
AssigneePPG Industries, Inc.
InventorsDavid E. Singleton, Kuo-Chuan Ho, Charles B. Greenberg
Life of this patent
Estimating the term…
Abstract
An electrochromic window includes a first transparent substrate, an electroconductive film electrode, a transparent electrochromic film in contact with said electroconductive film, an ion-conductive layer in contact with said electrochromic film, a counter electrode in contact with said ion-conductive layer, and a second transparent substrate overlaying the counter electrode. A plurality of bus bars extend across the electroconductive film electrode to distribute electrical current throughout the film electrode and provide a more uniform current density between the film electrode and the counter electrode.
Claims19
In a laminated article having variable transmittance in response to electric potential wherein the article includes:
- electrode means comprising an electroconductive film on a surface of a transparent substrate and an electrochromic film in contact with the electroconductive film;
- counter electrode means comprising an ion-conductive layer in contact with current conducting means;
- and
- the ion-conductive layer of the counter electrode means in contact with the electrochromic film of the electrode means,
- the improvement comprising:
- the electrode means comprising:
- at least one current conducting member in electrical contact with surface portions of the electroconductive film;
- and
- means providing electrical connection to said at least one current conducting member.
In a method of making a laminated article having variable transmittance in response to electric potential wherein the method includes the steps of:
- providing an electrochromic film in contact with an electroconductive film to define a conductive laminate;
- mounting the conductive laminate on a surface of a transparent substrate to define an electrode means;
- providing an ion-conductive layer in contact with current conducting means to define a counter electrode means;
- and
- contacting the ion-conductive layer of the counter electrode means and the electrochromic film of the electrode means;
- the improved method comprising the steps of:
- providing at least one current conducting member in electrical contact with the electroconductive film;
- and
- providing electrical access to the at least one current conducting member.
Dependencies are inferred from the claim text.