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US 10,952,292 B2Granted
Programmable driver for variable light intensity
AssigneeABL IP Holding LLC
InventorsTowfiq M. Chowdhury, Feng Chen
Life of this patent
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Abstract
Certain aspects involve lighting systems in which an intensity can be selectively modified. For instance, a lighting system includes a light source and a programmable device. The programmable device is configured to detect an input resistance and cause a particular current to flow through the light source, thereby causing the light source to emit a particular lumen intensity corresponding to an input resistance.
Claims19
A lighting system comprising:
- an output circuit comprising a light source;
- an input circuit comprising:
- a switch configured to receive a selection of a first intensity level or a second intensity level;
- and
- a resistor connected in parallel or in series with the switch, wherein:
- a first combination of the switch and the resistor causes a first input resistance that corresponds to the first intensity level;
- and
- a second combination of the switch and the resistor causes a second input resistance that corresponds to the second intensity level;
- and
- a current driver connected to the input circuit and the output circuit and configured to:
- (i) detect, on the input circuit, the first input resistance, wherein the first input resistance is independent of any detection of any current through the light source;
- and in response to detecting the first input resistance, cause a first current to flow on the output circuit to the light source, causing the light source to emit light at the first intensity level, and
- (ii) detect, on the input circuit, the second input resistance, wherein the second input resistance is independent of any detection of any current through the light source, and in response to detecting the second input resistance, cause a second current to flow on the output circuit to the light source, causing the light source to emit light at the second intensity level.
10 more elements
A lighting system comprising:
- a lighting source;
- a programmable device configured for controlling current delivered to the light source, the programmable device having a first terminal, a second terminal, and a third terminal;
- a first current path that includes the light source connected to the first terminal;
- and
- a second current path separate from the first current path, wherein the second current path comprises a switch and a resistor, starts at the second terminal, and terminates at the third terminal, wherein the first current path does not include the second terminal or the third terminal, wherein the programmable device is a current driver that is configured to:
- (i) detect, on the second current path, a first input resistance formed by the switch and the resistor, and in response to detecting the first input resistance;
- cause a first current to flow through the first current path, thereby causing the light source to emit light at a first intensity level;
- and
- (ii) detect, on the second current path, a second input resistance formed by the switch and the resistor, and in response to detecting the second input resistance, cause a second current to flow through the first current path, thereby causing the light source to emit light at a second intensity level.
6 more elements
A method of manufacturing a lighting system, the method comprising:
- identifying a first intensity level and a second intensity level;
- configuring a switch and a resistor such that a first combination of the switch and the resistor is configured to cause a first input resistance and a second combination of the switch and the resistor is configured to cause a second input resistance;
- configuring a first current path that includes a light source connected to a first terminal and configuring a second current path separate from the first current path, wherein the second current path comprises a switch and a resistor, starts at a second terminal, and terminates at a third terminal, wherein the first current path does not include the second terminal or the third terminal;
- configuring a current driver to operate in a first state corresponding to the first intensity level and a second state corresponding to the second intensity level;
- and
- installing the light source, the current driver, the resistor, the first current path, the second current path, the first terminal, the second terminal, and the third terminal, and the switch in the lighting system, the lighting system comprising:
- (i) a first configuration in which the current driver is configured to adjust an intensity of the light source to the first intensity level, the first configuration caused by the first combination of the switch and the resistor;
- and
- (ii) a second configuration in which the current driver is configured to adjust the intensity of the light source to the second intensity level, the second configuration caused by the second combination of the switch and the resistor.
6 more elements
Dependencies are inferred from the claim text.