Abstract: A light-emitting diode (LED) bulb includes a reflector, a plurality of LEDs disposed within a recess of the reflector, a thermally conductive liquid disposed within the recess, and an adjustment mechanism to move the LEDs from a first position to a second position, with respect to the reflector. The thermally conductive liquid may transfer heat generated by the LEDs to the reflector, and the reflector may dissipate heat transferred by the thermally conductive liquid to the surrounding environment. The reflector may also reflect light from the LEDs to produce a first light-distribution profile, having a respective first beam angle, when the LEDs are in the first position, and to produce a second light-distribution profile, having a respective second beam angle, when the LEDs are in the second position.

Abstract: An LED bulb includes a shell, one or more LEDs, a thermally conductive liquid, and a liquid-volume compensator mechanism. The one or more LEDs are disposed within the shell. The thermally conductive liquid is held within the shell. The liquid-volume compensator mechanism is configured to compensate for expansion of the thermally conductive liquid.

Abstract: A light emitting diode (LED) bulb includes a base, a shell connected to the base forming an enclosed volume, a chassis disposed within the shell, and a plurality of LEDs disposed with the shell. The LED bulb also includes a thermally conductive liquid disposed within the enclosed volume. The LEDs and the chassis are immersed in the thermally conductive liquid. The chassis has a first opening and a second opening. The second opening is spaced from the first opening to facilitate a passive convective flow of the thermally conductive liquid to exchange a first volume of the thermally conductive liquid interior the chassis with a second volume of the thermally conductive liquid exterior the chassis.

Abstract: An LED light bulb which turns itself permanently off when it reaches the end of its useful life, and more particularly, to a scheme which slightly varies the end-of-life condition from unit to unit.

Abstract: A liquid-filled light emitting diode (LED) bulb including a base, a shell, one or more LEDs, a thermally conductive liquid, and a bladder. The shell is connected to the base and the thermally conductive liquid is held within the shell. The one or more LEDs are disposed within the shell and immersed in the thermally conductive liquid. The bladder is also immersed in the thermally conductive liquid and is configured to compensate for expansion of the thermally conductive liquid.

Abstract: A light-emitting diode (LED) bulb has a shell and a base attached to the shell. An LED is within the shell. A driver circuit provides current to the LED. The driver circuit has a power factor control circuit that includes a tracking circuit configured to produce a tracking signal indicative of the voltage of the supply line. The power factor control circuit also includes a switch-mode power supply (SMPS) controller having an input pin and an output pin. The tracking circuit is connected to the input pin. Based on the signal at the input pin, the SMPS controller is configured to change a frequency of an output signal on the output pin.

Abstract: A liquid-filled light emitting diode (LED) bulb including a base, a shell connected to the base forming an enclosed volume, a thermally conductive liquid held within the enclosed volume, a support structure connected to the base, and several LEDs attached to the support structure. The thermally conductive liquid has an oxygen content of at least 5 cubic centimeters of oxygen per liter of the thermally conductive fluid.

Abstract: A circuit for driving multiple light emitting diodes (LEDs) includes at least two sets of LEDs, each set comprised of one or more LEDs in series. The circuit further includes a single inductor connected in series with the two sets of LEDs. At least one set of LEDs is connected to a shunting transistor connected in parallel with the set of LEDs. The duty cycle of the shunting transistor is controlled by a single controller connected to the shunting transistor and the inductor.

Abstract: A light-emitting diode (LED) bulb has an LED within a shell. The LED bulb includes a driver circuit for providing current to the LED. The drive circuit has a thermal protection circuit, which includes a first positive thermal coefficient thermistor with a first switching temperature connected in series with a second positive thermal coefficient thermistor with a second switching temperature. The driver circuit includes a switch-mode power supply (SMPS) controller with an input pin and an output pin. The thermistors are connected to the input pin. When either thermistor temperature is above the respective switching temperatures, the thermal protection circuit causes the SMPS controller to produce a signal with a second duty cycle on the output pin. When both thermistor temperatures are below the respective switching temperatures, the thermal protection circuit causes the SMPS controller to produce a signal with a first duty cycle on the output pin.

Abstract: An LED light source is described. The light source includes an LED and a diffuser. The LED emits a light having a dominant wavelength. The diffuser includes a filler material, which includes particles. The mean diameter of the particles is at least as large as the dominant wavelength of the light emitted by the LED. The particles are configured to scatter the light emitted by the LED.

Abstract: A light-emitting diode (LED) bulb comprises a base and a shell connected to the base. A first set of LEDs is disposed within the shell and is configured to emit light at a first color corresponding to a first black-body color temperature. A second set of LEDs is also disposed within the shell and is configured to emit light at a second color corresponding to a second black-body color temperature that is different from the first black-body color temperature. A control circuit is configured to provide a transitional-power state to the first and second sets of LEDs to transition between an initial-power state and a reduced-power state by producing a shifting color output that corresponds to a predetermined light-output curve.

Abstract: A light-emitting diode (LED) bulb has a shell. An LED is within the shell. The LED is electrically connected to a driver circuit, which is electrically connected to a base of the LED bulb. The LED bulb also has a heatsink between the shell and base. A thermal break partitions the heatsink into an upper partition adjacent the shell and a lower partition adjacent the base.

Abstract: An LED bulb is described, comprising LEDs within a shell and a driver circuit to operate the LEDs at a plurality of brightness levels. The driver circuit comprises first and second inputs to receive AC, a neutral input, a converter circuit, first and second rectifier circuits, a detector circuit, and a processing circuit. The first rectifier circuit is connected to the first and neutral inputs and rectifies the AC received. The second rectifier circuit is connected to the second and neutral inputs and rectifies the AC received. The detector circuit is connected to the first and second rectifier circuits. The processing circuit has a first and a second processor input, and is connected to the detector circuit. The processing circuit produces a chop signal with a duty cycle based on whether the first or second input is hot. The converter circuit powers the LEDs based on the chop signal.

Abstract: A glass LED bulb, which includes a body of glass, the body having at least one hollow portion, and at least one LED contained within the at least one hollow portion. A thermally conductive material is preferably included within the at least one hollow portion. The body of glass can be bulb-shaped or alternatively shaped like an incandescent bulb.

Abstract: An LED bulb having bulb-shaped shell and thermally conductive fluid or gel within the shell. The bulb includes at least one LED within the shell. The bulb includes at least one LED within the shell and a base. The base can be configured to fit within an electrical socket and can include a series of screw threads and a base pin, wherein the screw threads and base pin are dimensioned to be received within a standard electrical socket. Alternatively, the base can be configured to fit within a suitable electric socket.

Abstract: A liquid-cooled light emitting diode (LED) bulb which includes a base, a shell connected to the base forming an enclosed volume, and a plurality of LEDs attached to the base and disposed within the shell. The LED bulb also includes a volume of thermally-conductive liquid held within the enclosed volume. A scavenger element comprising a scavenger material is attached to the base and is exposed to the thermally-conductive liquid. The scavenger material is configured to capture contaminants in the thermally-conductive liquid.

Abstract: A method of making a light-emitting diode (LED) bulb and an LED bulb comprising a base, a shell connected to the base forming an enclosed volume. A thermally conductive liquid is held within the enclosed volume. A laminate support structure connected to the base and a plurality of flange portions formed in the laminate support structure. A plurality of LEDs are attached to the plurality of flange portions and arranged in a radial array.