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US 7,521,872 B2Granted
Integrated lamp with feedback and wireless control
AssigneeKoninklijke Philips Electronics N.V.
InventorGert W. Bruning
Life of this patent
Estimating the term…
Abstract
A lamp assembly (50) employs a reflector (52) defining a light reflecting area (53), and a heat sink (54) defining a circuit housing area (55). A LED assembly (51) is disposed within the light reflecting area (53) and heat sink (54) dissipates heat away from LED assembly (51). One or more LEDs of LED assembly (51) emit a light in response to a flow of a LED current through the LEDs. One or more optical power sensors of LED assembly (51) sense an emission of the light by LED(s). A LED driver circuit (30) is disposed within the circuit housing area (55) to control the flow of the LED current through the LED(s) as a function of a sensing of the emission of the light by the optical power sensor(s) and a desired level of one or more lighting variables associated with the LED(s).
Claims13
A lamp assembly (50), comprising:
- a reflector (52) defining a light reflecting area (53);
- a heat sink (54) defining a circuit housing area (55) operable to receive a LED driver circuit (30);
- a LED assembly (20) disposed within said light reflecting area (53) and in thermal communication with said heat sink (54) to dissipate heat away from said LED assembly (20), said LED assembly (20) including
- at least one LED (21) operable to emit a light in response to a flow of a LED current (ILED) through said at least one LED (21), a portion of the light being reflected within the light reflecting area (53) as reflected light, and
- at least one optical power sensor (22) operable to sense the reflected light;
- and
- wherein said LED driver circuit (30) is disposed within said circuit housing area (55), said LED driver circuit being in electrical communication with said LED assembly (20) to control the flow of the LED current (ILED) through said at least one LED (21) as a function of a sensing of the emission of the light by said at least one optical power sensor (22).
4 more elements
A lamp assembly (50), comprising:
- a reflector (52) defining a light reflecting area (53);
- a heat sink (54) defining a circuit housing area (55);
- a LED assembly (20) disposed within said light reflecting area (53) and in thermal communication with said heat sink (54) to dissipate heat away from said LED assembly (20), said LED assembly (20) including
- at least one LED (21) operable to emit a light in response to a flow of a LED current (ILED) through said at least one LED (21), a portion of the light being reflected within the light reflecting area (53) as reflected light, and
- at least one optical power sensor (22) operable to sense the reflected light;
- and
- a LED driver circuit (30) disposed within said circuit housing area (55), said LED driver circuit in electrical communication with said LED assembly (20) to control the flow of the LED current (ILED) through said at least one LED (21) as a function of a sensing of the emission of the light by said at least one optical power sensor (22), said LED driver circuit (30) including a transceiver (35) operable to receive a communication of at least one lighting variable associated with the emission of the light by said at least one LED (21);
- wherein the flow of the LED current (ILED) through said at least one LED (21) is a function of the sensing of the emission of the light by said at least one optical power sensor (22) and a reception of the communication of the at least one lighting variable by said transceiver (37).
5 more elements
A lamp assembly (50), comprising:
- a reflector (52) defining a light reflecting area (53);
- a heat sink (54) defining a circuit housing area (55);
- a LED assembly (20) disposed within said light reflecting area (53) and in thermal communication with said heat sink (54) to dissipate heat away from said LED assembly (20), said LED assembly (20) including
- at least one LED (21) operable to emit a light in response to a flow of a LED current (ILED) through said at least one LED (21), and
- at least one optical power sensor (22) operable to sense an emission of the light by said at least one LED (21);
- and
- a LED driver circuit (30) disposed within said circuit housing area (55), said LED driver circuit in electrical communication with said LED assembly (20) to control the flow of the LED current (ILED) through said at least one LED (21) as a function of a sensing of the emission of the light by said at least one optical power sensor (22), said LED driver circuit (30) including a transceiver (35) operable to receive a communication of at least one lighting variable associated with the emission of the light by said at least one LED (21), said LED driver circuit (30) further including an error detector (37) for generating a correction light value (CLV) indicative of a differential between a sensed light value (SLV) and a desired light value (DLV), the sensed light value (SLV) being indicative of the sensing of the emission of the light by said at least one optical power sensor (22), the desired light value (DLV) being indicative of the reception of the communication of the at least one lighting variable by said transceiver (35);
- wherein the flow of the LED current (ILED) through said at least one LED (21) is a function of the sensing of the emission of the light by said at least one optical power sensor (22) and a reception of the communication of the at least one lighting variable by said transceiver (37).
5 more elements
Dependencies are inferred from the claim text.