Busbars for electrically powered cells
First Claim
1. An edge busbar having a shape effective to be peripherally disposed about a substantial perimeter of an edge, between a first surface and an opposite second surface, of an electrical device, wherein said edge busbar comprises:
- at least one electrically conductive connector portion effective to form an electrically conductive path from said first surface, wrapping transversely around a portion of said edge, to said opposite second surface; and
an electrically conductive perimeter portion in electrical contact with said connector portion, wherein said perimeter portion is peripherally on said substantial perimeter.
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Accused Products
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.
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Citations
50 Claims
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1. An edge busbar having a shape effective to be peripherally disposed about a substantial perimeter of an edge, between a first surface and an opposite second surface, of an electrical device, wherein said edge busbar comprises:
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at least one electrically conductive connector portion effective to form an electrically conductive path from said first surface, wrapping transversely around a portion of said edge, to said opposite second surface; and
an electrically conductive perimeter portion in electrical contact with said connector portion, wherein said perimeter portion is peripherally on said substantial perimeter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An edge busbar pair comprising a first edge busbar and a second edge busbar, each edge busbar of said pair having a shape to be peripherally disposed about a respective substantial perimeter edge of a first substrate and a second substrate respectively of an electrical device, said edge busbar pair further including:
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said first busbar comprising a first connector portion and a first perimeter portion, said first connector portion effective to form an electrically conductive first path from a first front surface of said first substrate, wrapping around a portion of said edge of said first substrate, to an opposite first back surface of said first substrate, said first perimeter portion being in electrical contact with said first connector portion, and wherein said first perimeter portion is peripherally on said first substantial perimeter of said first substrate;
a second busbar comprising a second connector portion and a second perimeter portion, said second connector portion effective to form an electrically conductive second path from a second front surface of said second substrate, wrapping around a portion of an edge of said second substrate, to an opposite second back surface of said second substrate, said second perimeter portion being in electrical contact with said second connector portion, and wherein said second perimeter portion is peripherally on said second substantial perimeter of said second substrate; and
wherein said first front surface and said second front surface proximately face each other. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17, 18, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30)
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16. An electrochromic device comprising a first substrate;
- a second substrate; and
an edge busbar pair, wherein said edge busbar pair comprising a first edge busbar and a second edge busbar, each edge busbar of said pair peripherally disposed about a respective substantial perimeter edge of said first substrate and said second substrate respectively, said edge busbar pair further including;
said first busbar comprising a first connector portion and a first perimeter portion, said first connector portion effective to form an electrically conductive first path from a first front surface of said first substrate, wrapping around a portion of said edge of said first substrate, to an opposite first back surface of said first substrate, said first perimeter portion being in electrical contact with said first connector portion, and wherein said first perimeter portion is peripherally on said first substantial perimeter of said first substrate;
a second busbar comprising a second connector portion and a second perimeter portion, said second connector portion effective to form an electrically conductive second path from a second front surface of said second substrate, wrapping around a portion of an edge of said second substrate, to an opposite second back surface of said second substrate, said second perimeter portion being in electrical contact with said second connector portion, and wherein said second perimeter portion is peripherally on said second substantial perimeter of said second substrate; and
wherein said first front surface and said second front surface face each other.
- a second substrate; and
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19. An internal busbar for a substrate having a conductive layer and a reactive layer on a first surface, said internal busbar comprising:
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at least one conductive strip, isolated from chemical reaction with said reactive layer; and
at least one conductive connecting portion, each connecting portion electrically connecting a non-peripheral portion of said conductive layer to a segment of said conductive strip.
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23. An internal busbar for a substrate having a conductive layer on a surface of the substrate, said internal busbar comprising:
at least one conductive strip having increased electrical conductance per unit length from the conductive layer in a longitudinal direction of said conductive strip, and said conductive strip having a perimeter in contact with the conductive layer.
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31. A transparent conducting sheet comprising:
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a transparent substrate sheet;
a transparent electrically conducting layer on a substantial surface of said substrate sheet; and
at least one conductive strip interior to a perimeter edge of said conducting layer;
said at least on e conductive strip effective to lower an effective conductivity of said conducting layer. - View Dependent Claims (32, 33, 35, 36, 38, 39)
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34. An electrical device comprising:
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a conductive layer;
an edge conductor on a perimeter portion of said conductive layer; and
at least one conductive strip having increased electrical conductance per unit length from said conductive layer, and said conductive strip having a perimeter in contact with said conductive layer.
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37. A chromogenic device comprising:
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a plurality of layers responsive to a first signal applied transversely effective to cause a change in a first property of said chromogenic device, and responsive to a second signal applied in a laminar direction effective to cause a change in a second property of said chromogenic device;
at least one conductor strip arranged in said laminar direction, said conductor strip interior of a perimeter of said layers;
a first edge conductor at a first perimeter portion of a first layer of said layers;
a second edge conductor at a second perimeter portion of a second layer of said layers;
wherein application of said first signal transversely from said first edge conductor to said second edge conductor, without application of a potential difference longitudinally along said at least one conductor strip, causes a responsive change in said first property without a change in said second property; and
wherein application of said second signal as a longitudinal signal along said at least one conductor strip, without a transverse potential difference between said first and second edge conductors, causes a responsive change in said second property without a change in said first property.
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40. A method to form an interior busbar comprising the steps of:
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forming at least one channel on a surface of a substrate interior to the perimeter;
applying a conductive material to said at least one channel;
applying a conductive layer over said surface effective to completely cover said applied conductive material.
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41. 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. - View Dependent Claims (42, 43, 44, 46, 47, 48)
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45. 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.
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49. 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.
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50. An electronic circuit to power a chromogenic device wherein the voltage reduction is carried out using a switching voltage regulator.
Specification