Busbars for electrically powered cells
AssigneeDonnelly Corporation
InventorsAnoop Agrawal, Juan Carlos Lopez Tonazzi, Robert LeCompte, John Cronin, Steve Kennedy, Kevin McCarthy, Matthew Denesuk, Gimtong Teowee
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Abstract
Edge busbars on a substantial perimeter of an electrochromic device are disclosed having electrical paths wrapping over the perimeter edge. Internal busbars interior from the perimeter are disclosed which lower the conductivity of the conductive layer of an electrochromic device. Signals supplied to the busbars to control the electrochromic device are controlled by a switching power supply that allows the maintaining of the color of the electrochromic device without application of continuous power.
Claims9
A method to control an electrochromic device having a light transmission property that responds to a physical or chemical effect, wherein the light transmission property changes in response to an electrical signal, wherein said method comprises the step of:
- intermittently applying the electrical signal by controlling the on duration t1 and the off duration t2 of the electrical signal individually, in response to the physical or chemical effect, effective to maintain the light transmission property within a range of about 1% to about 10% of a predetermined value of said light transmission property.
An electrochromic device having a light transmission property that responds to a physical or chemical property, wherein the light transmission property changes in response to an electrical signal, wherein said electrochromic device includes:
- a means to intermittently apply the electrical signal by controlling the on duration t1 and the off duration t2 of the electrical signal individually, in response to the physical or chemical property, effective to maintain the light transmission property within a range of about 1% to about 10% of a predetermined value of the light transmission property.
A method to control an electrochromic device having a light transmission property that responds to a physical or chemical property, wherein the light transmission property changes in response to an electrical signal, wherein said method comprises the step of:
- intermittently applying the electrical signal by controlling the on duration t1 and the off duration t2 of the electrical signal individually, in response to the physical or chemical property, effective to maintain the light transmission property within a range of about 1% to about 10% of a predetermined value of said light transmission property;
- wherein the voltage of the applied electrical signal is supplied from a regulated power supply that is regulated by a switching voltage regulator.
Dependencies are inferred from the claim text.