Two-wire dome light power and control system
First Claim
1. A dome light assembly, comprising:
- a display;
a single pair of wires that transmit power and a control signal to said display; and
a receiver linked to said display by said single pair of wires, wherein said receiver is configured to activate said display in accordance with the control signal.
1 Assignment
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Accused Products
Abstract
A display system includes a dome light with a data receiver, a user control station with a data transmitter, a power supply furnishing low-voltage AC power to the control station, and a two-wire interconnecting cable between the transmitter and receiver can provide an essentially unlimited number of distinct lamp control functions rather than being limited to the number possible in a switch-per-lamp system. Using a digital message, the receiver can identify separate commands for a large number of indicators in the dome light assembly. By using the same two-wire interconnecting cable both for power and for data transmission, interconnection complexity can be minimized without limiting flexibility. For example, it is possible with this system to replace a dome light assembly with a different one that features additional lamps without needing to rewire the installation. The system can be implemented using shielded twisted pair cable, minimizing EMI and thereby enhancing safety in a medical or research environment.
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Citations
22 Claims
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1. A dome light assembly, comprising:
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a display;
a single pair of wires that transmit power and a control signal to said display; and
a receiver linked to said display by said single pair of wires, wherein said receiver is configured to activate said display in accordance with the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of indicating the status of a room, comprising:
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receiving control signals from a single pair of wires to activate a display device, wherein the single pair transmits both power and the control signals; and
activating the display device in accordance with the content of the control signals received. - View Dependent Claims (19)
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20. A dome light system, comprising:
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means for receiving a control signal and power from a single pair of wires; and
means for actuating a means for displaying in accordance with the content of the control signals received. - View Dependent Claims (21)
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22. A dome assembly, comprising:
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a display;
a single pair of wires that transmits a control signal and power to the display;
a receiver linked to the display through the wires, the receiver configured to evaluate the control signal and activate the display in accordance with the control signal in at least one of a plurality of modes.
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Specification