Low resistance switch using carbon contacts
First Claim
Patent Images
1. A switch assembly, comprising:
- a first electrical device including a first control terminal, the first electrical device causing a distinguishable electrical output to be provided on a single output line when a first control signal is asserted on the first control terminal of the first electrical device;
a second electrical device including a second control terminal, the second electrical device causing a different distinguishable electrical output to be provided on the single output line when a second control signal is asserted on the second control terminal of the second electrical device;
a first user activated switch with carbon-coated contacts, the first user activated switch when asserted providing the first control signal to the first control terminal of the first electrical device; and
a second user activated switch with carbon-coated contacts, the second user activated switch when asserted providing the second control signal to the second control terminal of the second electrical device.
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Accused Products
Abstract
A switch assembly includes a plurality of electrical devices and a plurality of user activated switches. The plurality of electrical devices each include a control terminal. Each of the electrical devices causes a different distinguishable output to be provided when a control signal is asserted on the control terminal of one of the plurality of electrical devices. The plurality of user activated switches include carbon-coated contacts. Each of the user activated switches when asserted provides the control signal to the control terminal of one of the plurality of electrical devices.
159 Citations
23 Claims
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1. A switch assembly, comprising:
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a first electrical device including a first control terminal, the first electrical device causing a distinguishable electrical output to be provided on a single output line when a first control signal is asserted on the first control terminal of the first electrical device;
a second electrical device including a second control terminal, the second electrical device causing a different distinguishable electrical output to be provided on the single output line when a second control signal is asserted on the second control terminal of the second electrical device;
a first user activated switch with carbon-coated contacts, the first user activated switch when asserted providing the first control signal to the first control terminal of the first electrical device; and
a second user activated switch with carbon-coated contacts, the second user activated switch when asserted providing the second control signal to the second control terminal of the second electrical device. - View Dependent Claims (2, 3, 4)
an elastomer;
a carbon coated contact attached to the elastomer at a contact area; and
a first copper trace and a second copper trace attached to a printed circuit board, wherein the first and second copper traces each include carbon-coated contacts at the contact area, and wherein the elastomer prevents the carbon-coated contact attached to the elastomer from making electrical contact with the carbon-coated contacts of the first and second copper traces when the user activated switches are unactivated.
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3. The switch assembly of claim 1, wherein the electrical devices are field effect transistors.
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4. The switch assembly of claim 1, wherein the electrical devices are bipolar junction transistors.
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5. A rearview mirror assembly for a vehicle comprising:
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a housing having a mounting member for mounting said housing to the vehicle, said housing including a bezel;
an electrochromic mirror disposed in said housing, said mirror having a front surface and a rear surface; and
a switch assembly retained in said housing including;
a plurality of electrical devices each further including a control terminal, each of the plurality of electrical devices causing a different distinguishable electrical output to be provided to a remote electrical device on a single output line when a control signal is asserted on the control terminal of one of the plurality of electrical devices; and
a plurality of user activated switches with carbon-coated contacts, each of the user activated switches when asserted providing the control signal to the control terminal of one of the plurality of electrical devices. - View Dependent Claims (6, 7, 8, 9, 10, 11)
front and rear spaced elements, each having front and rear surfaces and being sealably bonded together in a spaced-apart relationship to define a chamber;
a transparent first electrode including a layer of transparent conductive material carried on said rear surface of said front element;
at least one electrochromic material contained within said chamber; and
a second electrode disposed on said front surface of said rear element, wherein either said second electrode is a reflective electrode or a transparent electrode with a corresponding separate reflector disposed over substantially all of said rear surface of said rear element.
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7. The rearview mirror assembly of claim 5, wherein the user activated switches of the switch assembly each further include:
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an elastomer;
a carbon coated contact attached to the elastomer at a contact area; and
a first copper trace and a second copper trace attached to a printed circuit board, wherein the first and second copper traces each include carbon-coated contacts at the contact area, and wherein the elastomer prevents the carbon-coated contact attached to the elastomer from making electrical contact with the carbon-coated contacts of the first and second copper traces when the user activated switches are unactivated.
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8. The rearview mirror assembly of claim 5, wherein the electrical devices are field effect transistors.
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9. The rearview mirror assembly of claim 5, wherein the electrical devices are bipolar junction transistors.
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10. The rearview mirror assembly of claim 5, wherein a processor monitors the plurality of user activated switches and provides the control signal to one of the plurality of electrical devices upon switch assertion.
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11. The rearview mirror assembly of claim 5, wherein the plurality of electrical devices includes a first electrical device that causes a distinguishable electrical output to be provided on the single output line when a first control signal is asserted on a first control terminal of the first electrical device and a second electrical device that causes a different distinguishable electrical output to be provided on the single output line when a second control signal is asserted on a second control terminal of the second electrical device, and wherein the plurality of user activated switches includes a first user activated switch with carbon-coated contacts which when asserted provides the first control signal to the first control terminal of the first electrical device and a second user activated switch with carbon-coated contacts which when asserted provides the second control signal to the second control terminal of the second electrical device.
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12. A rearview mirror assembly for a vehicle comprising:
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a housing having a mounting member for mounting said housing to the vehicle, said housing including a bezel;
an electrochromic mirror disposed in said housing, said mirror having a front surface and a rear surface; and
a switch assembly retained in said housing including;
a plurality of electrical devices each further including a control terminal, each of the plurality of electrical devices causing a different distinguishable electrical output to be provided to a cellular telephone transceiver on a single output line when a control signal is asserted on the control terminal of one of the plurality of electrical devices; and
a plurality of user activated switches with carbon-coated contacts, each of the user activated switches when asserted providing the control signal to the control terminal of one of the plurality of electrical devices. - View Dependent Claims (13, 14, 15, 16, 17, 18)
front and rear spaced elements, each having front and rear surfaces and being sealably bonded together in a spaced-apart relationship to define a chamber;
a transparent first electrode including a layer of transparent conductive material carried on said rear surface of said front element;
at least one electrochromic material contained within said chamber; and
a second electrode disposed on said front surface of said rear element, wherein either said second electrode is a reflective electrode or a transparent electrode with a corresponding separate reflector disposed over substantially all of said rear surface of said rear element.
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14. The rearview mirror assembly of claim 12, wherein the user activated switches of the switch assembly each further include:
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an elastomer;
a carbon coated contact attached to the elastomer at a contact area; and
a first copper trace and a second copper trace attached to a printed circuit board, wherein the first and second copper traces each include carbon-coated contacts at the contact area, and wherein the elastomer prevents the carbon-coated contact attached to the elastomer from making electrical contact with the carbon-coated contacts of the first and second copper traces when the user activated switches are unactivated.
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15. The rearview mirror assembly of claim 12, wherein the electrical devices are field effect transistors.
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16. The rearview mirror assembly of claim 12, wherein the electrical devices are bipolar junction transistors.
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17. The rearview mirror assembly of claim 12, wherein a processor monitors the plurality of user activated switches and provides the control signal to one of the plurality of electrical devices upon switch assertion.
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18. The rearview mirror assembly of claim 12, wherein the plurality of electrical devices includes a first electrical device that causes a distinguishable electrical output to be provided on the single output line when a first control signal is asserted on a first control terminal of the first electrical device and a second electrical device that causes a different distinguishable electrical output to be provided on the single output line when a second control signal is asserted on a second control terminal of the second electrical device, and wherein the plurality of user activated switches includes a first user activated switch with carbon-coated contacts which when asserted provides the first control signal to the first control terminal of the first electrical device and a second user activated switch with carbon-coated contacts which when asserted provides the second control signal to the second control terminal of the second electrical device.
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19. A vehicle accessory for a vehicle, comprising:
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a housing having a mounting member for mounting said housing to the vehicle; and
a switch assembly retained in said housing including;
a plurality of electrical devices each further including a control terminal, each of the plurality of electrical devices causing a different distinguishable electrical output to be provided to a cellular telephone transceiver on a single output line when a control signal is asserted on the control terminal of one of the plurality of electrical devices; and
a plurality of user activated switches with carbon-coated contacts, each of the user activated switches when asserted providing the control signal to the control terminal of one of the plurality of electrical devices. - View Dependent Claims (20, 21, 22, 23)
an elastomer;
a carbon coated contact attached to the elastomer at a contact area; and
a first copper trace and a second copper trace attached to a printed circuit board, wherein the first and second copper traces each include carbon-coated contacts at the contact area, and wherein the elastomer prevents the carbon-coated contact attached to the elastomer from making electrical contact with the carbon-coated contacts of the first and second copper traces when the user activated switches are unactivated.
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21. The accessory of claim 19, wherein the electrical devices are one of field effect transistors and bipolar junction transistors.
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22. The accessory of claim 19, wherein a processor monitors the plurality of user activated switches and provides the control signal to one of the plurality of electrical devices upon switch assertion.
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23. The accessory of claim 19, wherein the plurality of electrical devices includes a first electrical device that causes a distinguishable electrical output to be provided on the single output line when a first control signal is asserted on a first control terminal of the first electrical device and a second electrical device that causes a different distinguishable electrical output to be provided on the single output line when a second control signal is asserted on a second control terminal of the second electrical device, and wherein the plurality of user activated switches includes a first user activated switch with carbon-coated contacts which when asserted provides the first control signal to the first control terminal of the first electrical device and a second user activated switch with carbon-coated contacts which when asserted provides the second control signal to the second control terminal of the second electrical device.
Specification