| Switch Bulb Company, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20150260353 | LIQUID-FILLED LED BULB HAVING A UNIFORM LIGHT-DISTRIBUTION PROFILE - An LED bulb includes a base and a shell connected to the base. The shell is filled with a thermally conductive liquid for cooling the bulb. A plurality of LEDs is disposed within the shell. A first set of LEDs of the plurality of LEDs is positioned a first distance with respect to the center of a convex portion of the shell, and at a first angle with respect to a centerline of the LED bulb. A second set of LEDs of the plurality of LEDs is positioned a second distance with respect to the center of the convex portion of the shell, and at a second angle with respect to a centerline of the LED bulb. The first distance, first angle, second distance, and second angle are selected such that the LED bulb has a light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell. | 09-17-2015 |
| 20150260352 | LED BULB WITH CHASSIS FOR PASSIVE CONVECTIVE LIQUID COOLING - 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. | 09-17-2015 |
| 20150184815 | LED BULB HAVING AN ADJUSTABLE LIGHT-DISTRIBUTION PROFILE - 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. | 07-02-2015 |
| 20150102724 | THERMAL PROTECTION CIRCUIT FOR AN LED BULB - 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. | 04-16-2015 |
| 20150078016 | ANTI-THEFT COLLAR FOR AN LED LIGHT BULB HAVING COOLING FINS - An anti-theft collar for preventing removal of a light-emitting diode (LED) bulb having cooling fins when the LED bulb is installed in a socket housing of a light fixture. The anti-theft collar includes a wall portion configured to enclose at least a portion of the LED bulb and at least a portion of the socket housing. The anti-theft collar also includes a pair of ribs configured to engage with the cooling fins to inhibit rotation of the LED bulb with respect to the anti-theft collar when the anti-theft collar is installed. The anti-theft collar also includes one or more features configured to inhibit movement of the anti-theft collar with respect to the socket housing of the light fixture. | 03-19-2015 |
| 20150078015 | ANTI-THEFT COLLAR FOR A LIGHT BULB - An anti-theft system for preventing removal of a light bulb when installed in a socket housing of a light fixture. The anti-theft system includes an anti-theft collar configured to mechanically engage with the light bulb and the socket housing. The anti-theft collar includes a wall portion configured to enclose at least a portion of the light bulb and at least a portion of the socket housing. The anti-theft collar also includes one or more features configured to inhibit rotation of the light bulb with respect to the anti-theft collar when the anti-theft collar is installed. The anti-theft collar also includes one or more features configured to inhibit movement of the anti-theft collar with respect to the socket housing of the light fixture. | 03-19-2015 |
| 20150023029 | OMNI-DIRECTIONAL CHANNELING OF LIQUIDS FOR PASSIVE CONVECTION IN LED BULBS - An LED bulb has a base, a shell connected to the base, and a thermally conductive liquid held within the shell. The LED bulb has a plurality of LEDs mounted on LED mounting surfaces disposed within the shell. The LED mounting surfaces face different radial directions, and the LED mounting surfaces are configured to facilitate a passive convective flow of the thermally conductive liquid within the LED bulb to transfer heat from the LEDs to the shell when the LED bulb is oriented in at least three different orientations. In a first orientation, the shell is disposed vertically above the base. In a second orientation, the shell is disposed on the same horizontal plane as the base. In a third orientation, the shell is disposed vertically below the base. | 01-22-2015 |
| 20140333193 | GLASS LED LIGHT BULBS - 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. | 11-13-2014 |
| 20140327369 | THREE-LEVEL LED BULB MICROPROCESSOR-BASED DRIVER - 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. | 11-06-2014 |
| 20140265923 | LED BULB WITH COLOR-SHIFT DIMMING - 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. | 09-18-2014 |
| 20140265811 | LED LIGHT BULB WITH A PHOSPHOR STRUCTURE IN AN INDEX-MATCHED LIQUID - A liquid-filled LED bulb including a base and a shell connected to the base forming an enclosed volume. The liquid-filled LED bulb also includes a plurality of LEDs attached to the base and disposed within the enclosed volume. A thermally conductive liquid is held within the enclosed volume and has a first index of refraction. The LED bulb also includes a ring structure disposed within the enclosed volume and immersed in the thermally conductive liquid. The ring structure has a second index of refraction that matches the first index of refraction. A phosphor material is disposed on, or dispersed within, the ring structure. A first amount of the thermally conductive liquid is disposed between the LEDs and the ring structure and a second amount of the thermally conductive liquid is disposed between the ring structure and the shell. | 09-18-2014 |
| 20140218930 | PLASTIC LED BULB - An LED bulb having a bulb-shaped shell, a thermally conductive plastic material within the bulb-shaped shell, and at least one LED within the bulb-shaped shell. The bulb also includes a base, wherein the base is dimensioned to be received within a standard electrical socket. | 08-07-2014 |
| 20140184058 | METHOD OF LIGHT DISPERSION AND PREFERENTIAL SCATTERING OF CERTAIN WAVELENGTHS OF LIGHT FOR LIGHT-EMITTING DIODES AND BULBS CONSTRUCTED THEREFROM - A light emitting diode (LED) bulb configured to scatter certain wavelengths of light. The LED bulb includes a base having threads, a bulb shell, at least one LED, and a plurality of particles disposed within the bulb shell. The plurality of particles has a first and second set of particles. The first set of particles is configured to scatter short wavelength components of light emitted from the at least one LED and has particles with an effective diameter that is a fraction of the dominant wavelength of the light emitted from the at least one LED. The second set of particles is configured to scatter light emitted from the at least one LED, and has particles with an effective diameter equal to or greater than the dominant wavelength of the light emitted from the at least one LED. | 07-03-2014 |
| 20140175973 | PHOSPHOR-CONTAINING LED LIGHT BULB - An LED bulb, which includes a shell, a filler material within the shell of the bulb, at least one type of phosphor dispersed inside the filler material and at least one LED within the shell. | 06-26-2014 |
| 20140167592 | HEAT REMOVAL DESIGN FOR LED BULBS - 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. | 06-19-2014 |
| 20140159561 | CONTROL OF LUMEN LOSS IN A LIQUID-FILLED LED BULB - 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. | 06-12-2014 |
| 20140117864 | WHITE AC LED - A multi-color white LED which can be driven by a single current, and more particularly, to the use of a specific ratio of numbers of different color LEDs to obtain a specific desired color while running all of them at the same current. | 05-01-2014 |
| 20140043822 | LED BULB HAVING A UNIFORM LIGHT-DISTRIBUTION PROFILE - An LED bulb includes a stem body, a shell, a plurality of LEDs, and a thermally conductive liquid. The shell is connected to the stem body. The plurality of LEDs is disposed within the shell. The thermally conductive liquid is held within the shell. The LEDs and the shell are configured to provide the LED bulb with a uniform light-distribution profile. | 02-13-2014 |
| 20140043821 | LED BULB HAVING A UNIFORM LIGHT-DISTRIBUTION PROFILE - An LED bulb includes a base, a shell, a plurality of LEDs, and a thermally conductive liquid. The shell is connected to the base. The plurality of LEDs is attached to the base and disposed within the shell. The thermally conductive liquid is held within the shell. The LED bulb is configured to produce a uniform light-distribution profile. | 02-13-2014 |
| 20140043789 | LED LIGHT BULB WITH CONTROLLED COLOR DISTRIBUTION USING QUANTUM DOTS - A liquid-cooled LED bulb including a base and a shell connected to the base forming an enclosed volume. The liquid-cooled LED bulb also includes a plurality of LEDs attached to the base and disposed within the shell. The LED bulb also includes a thermally-conductive liquid held within the enclosed volume and a quantum dot material for adjusting the wavelength of light emitted from LED bulb. | 02-13-2014 |
| 20140036506 | EXPANDABLE LIQUID VOLUME IN AN LED BULB - 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. | 02-06-2014 |
| 20140033512 | SCAVENGERS FOR REDUCING CONTAMINANTS IN LIQUID-FILLED LED BULBS - 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. | 02-06-2014 |
| 20140028207 | SINGLE INDUCTOR CONTROL OF MULTI-COLOR LED SYSTEMS - 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. | 01-30-2014 |
| 20140028182 | METHOD OF LIGHT DISPERSION AND PREFERENTIAL SCATTERING OF CERTAIN WAVELENGTHS OF LIGHT FOR LIGHT-EMITTING DIODES AND BULBS CONSTRUCTED THEREFROM - A light emitting diode (LED) bulb configured to scatter certain wavelengths of light. The LED bulb includes a base having threads, a bulb shell, at least one LED, and a plurality of particles disposed within the bulb shell. The plurality of particles has a first and second set of particles. The first set of particles is configured to scatter short wavelength components of light emitted from the at least one LED and has particles with an effective diameter that is a fraction of the dominant wavelength of the light emitted from the at least one LED. The second set of particles is configured to scatter light emitted from the at least one LED, and has particles with an effective diameter equal to or greater than the dominant wavelength of the light emitted from the at least one LED. | 01-30-2014 |
| 20130328474 | OMNI-DIRECTIONAL CHANNELING OF LIQUIDS FOR PASSIVE CONVECTION IN LED BULBS - An LED bulb has a base, a shell connected to the base, and a thermally conductive liquid held within the shell. The LED bulb has a plurality of LEDs mounted on LED mounting surfaces disposed within the shell. The LED mounting surfaces face different radial directions, and the LED mounting surfaces are configured to facilitate a passive convective flow of the thermally conductive liquid within the LED bulb to transfer heat from the LEDs to the shell when the LED bulb is oriented in at least three different orientations. In a first orientation, the shell is disposed vertically above the base. In a second orientation, the shell is disposed on the same horizontal plane as the base. In a third orientation, the shell is disposed vertically below the base. | 12-12-2013 |
| 20130257302 | DIMMER COMPATIABLE LED BULB DRIVER CIRCUIT - A light-emitting diode (LED) bulb for use with a leading-edge dimmer includes a shell and an LED contained within the shell. A base is attached to the bulb for connecting the LED bulb to an electrical socket. A driver circuit is configured to provide current to the LED. The driver circuit has an input filter circuit that includes a first inductor. In response to the input filter receiving a switched AC voltage from a leading-edge dimmer set to dim at 50%, the first inductor is configured to saturate. In response to an undimmed AC voltage from the leading-edge dimmer, the first inductor is configured to not saturate. The input filter also includes a bridge rectifier connected to the first inductor. | 10-03-2013 |
| 20130250585 | LED PACKAGES FOR AN LED BULB - A light-emitting diode (LED) bulb includes a base, a shell connected to the base, a thermally conductive liquid held within the shell, and one or more support structures disposed within the shell. One or more LEDs are mounted to the one or more support structures and immersed in the thermally conductive liquid. The one or more LEDs each comprise a semiconductor die having at least one light-emitting interface and the one or more LEDs configured to emit light from the at least one light-emitting interface directly into the thermally conductive liquid. | 09-26-2013 |
| 20130223047 | GLASS LED LIGHT BULBS - 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. | 08-29-2013 |
| 20130214313 | DIFFUSER FOR LED LIGHT SOURCES - 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. | 08-22-2013 |
| 20130176744 | PARTITIONED HEATSINK FOR IMPROVED COOLING OF AN LED BULB - 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. | 07-11-2013 |
| 20130148355 | LED BULB WITH LIQUID-COOLED DRIVE ELECTRONICS - A liquid-filled light emitting diode (LED) bulb including a stem body, a shell connected to the stem body to form an enclosed volume, and one or more LEDs attached to a support structure and disposed between the shell and the stem body. The LED bulb also includes a driver circuit configured to electrically drive the one or more LEDs. A thermally conductive liquid and a liquid-volume compensation mechanism are also disposed with the enclosed volume. The one or more LEDs and the driver circuit are thermally coupled to the thermally conductive liquid. | 06-13-2013 |
| 20130146901 | COMPRESSION VOLUME COMPENSATION - 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. | 06-13-2013 |
| 20130070450 | LED LIGHT BULB WITH CONTROLLED COLOR DISTRIBUTION USING QUANTUM DOTS - A liquid-cooled LED bulb including a base and a shell connected to the base forming an enclosed volume. The liquid-cooled LED bulb also includes a plurality of LEDs attached to the base and disposed within the shell. The LED bulb also includes a thermally-conductive liquid held within the enclosed volume and a quantum dot material for adjusting the wavelength of light emitted from LED bulb. | 03-21-2013 |
| 20130063030 | SCAVENGERS FOR REDUCING CONTAMINANTS IN LIQUID-FILLED LED BULBS - 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. | 03-14-2013 |
| 20130033179 | THERMAL PROTECTION CIRCUIT FOR AN LED BULB - 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. | 02-07-2013 |
| 20130027941 | EXPANDABLE LIQUID VOLUME IN AN LED BULB - An LED bulb includes a base, a shell connected to the base, one or more LEDs, a thermally conductive liquid, and a flexible diaphragm. The one or more LEDs are disposed within the shell. The thermally conductive liquid is held within the shell. The flexible diaphragm is in fluidic connection to the thermally conductive liquid, and is configured to deflect from a first position to a second position to compensate for expansion of the thermally conductive liquid. | 01-31-2013 |
| 20130026932 | SINGLE INDUCTOR CONTROL OF MULTI-COLOR LED SYSTEMS - 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. | 01-31-2013 |
| 20130020923 | LIQUID DISPLACEMENT BEADS IN LED BULBS - An LED bulb includes at least one LED disposed within a shell, which is connected to a base. A thermally conductive liquid is held within the shell. The LED is immersed in the thermally conductive liquid. A plurality of beads is immersed in the thermally conductive liquid. The beads are compressible, where the beads are compressed in response to expansion of the thermally conductive liquid. | 01-24-2013 |
| 20130010480 | PARTITIONED HEATSINK FOR IMPROVED COOLING OF AN LED BULB - 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. | 01-10-2013 |
| 20120313520 | POWER FACTOR CONTROL FOR AN LED BULB DRIVER CIRCUIT - 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 duty cycle of an output signal on the output pin. | 12-13-2012 |
| 20120287608 | LIQUID DISPLACER IN LED BULBS - An LED bulb includes at least one LED mount disposed within a shell. At least one LED is attached to the at least one LED mount. A thermally conductive liquid is held within the shell. The LED and LED mount are immersed in the thermally conductive liquid. A liquid displacer is immersed in the thermally conductive liquid. The liquid displacer is configured to displace a predetermined amount of the thermally conductive liquid to reduce the amount of thermally conductive liquid held within the shell. The liquid displacer is also configured to be compressible, where the liquid displacer is compressed in response to expansion of the thermally conductive liquid. | 11-15-2012 |
| 20120229018 | METHOD OF LIGHT DISPERSION AND PREFERENTIAL SCATTERING OF CERTAIN WAVELENGTHS OF LIGHT-EMITTING DIODES AND BULBS CONSTRUCTED THEREFROM - A light emitting diode (LED) bulb configured to scatter certain wavelengths of light. The LED bulb includes a base having threads, a bulb shell, at least one LED, and a plurality of particles disposed within the bulb shell. The plurality of particles has a first and second set of particles. The first set of particles is configured to scatter short wavelength components of light emitted from the at least one LED and has particles with an effective diameter that is a fraction of the dominant wavelength of the light emitted from the at least one LED. The second set of particles is configured to scatter light emitted from the at least one LED, and has particles with an effective diameter equal to or greater than the dominant wavelength of the light emitted from the at least one LED. | 09-13-2012 |
| 20120201027 | EXPANDABLE LIQUID VOLUME IN AN LED BULB - An LED bulb includes a base, a shell connected to the base, an LED mount disposed within the shell, one or more LEDs, a thermally conductive liquid, and a liquid-volume compensator mechanism. The one or more LEDs are mounted on the LED mount. The thermally conductive liquid is held within the shell. The liquid-volume compensator mechanism moves from a first position to a second position to compensate for expansion of the thermally conductive liquid. | 08-09-2012 |
| 20120098443 | WHITE AC LED - A multi-color white LED which can be driven by a single current, and more particularly, to the use of a specific ratio of numbers of different color LEDs to obtain a specific desired color while running all of them at the same current. | 04-26-2012 |
| 20120033440 | EXPANDABLE LIQUID VOLUME IN AN LED BULB - An LED bulb includes a base, a shell, a plurality of LEDs, a thermally conductive liquid, and a liquid-volume compensator mechanism. The shell is connected to the base. The plurality of LEDs is attached to the base and disposed within the shell. The thermally conductive liquid is held within the shell. The liquid-volume compensator mechanism is attached to the base. The liquid-volume compensator mechanism is configured to compensate for expansion of the thermally conductive liquid. The liquid-volume compensator mechanism moves from a first position to a second position. A first volume is provided for the thermally conductive liquid in the first position. A second volume, which is greater than the first volume, is provided for the thermally conductive liquid in the second position. | 02-09-2012 |
| 20120026723 | OMNI-DIRECTIONAL CHANNELING OF LIQUIDS FOR PASSIVE CONVECTION IN LED BULBS - An LED bulb includes a base, a shell connected to the base, and a thermally conducting liquid held within the shell. The LED bulb has a plurality of finger-shaped projections, disposed within the shell. The finger-shaped projections are separated by a plurality of channels formed between pairs of the plurality of finger-shaped projections for holding a plurality of LEDs. The plurality of finger-shaped projections and the plurality of channels are configured to facilitate a passive convective flow of the thermally conductive liquid through the plurality of channels, when the LED bulb is oriented in at least three different orientations. In a first orientation, the shell is disposed vertically above the base. In a second orientation, the shell is disposed on the same horizontal plane as the base. In a third orientation, the shell is disposed vertically below the base. | 02-02-2012 |
| 20110298375 | Power Factor Control For An LED Bulb Driver Circuit - 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 duty cycle of an output signal on the output pin. | 12-08-2011 |
| 20110298374 | THERMAL PROTECTION CIRCUIT FOR AN LED BULB - A light-emitting diode (LED) bulb has an LED within a shell. The LED bulb also includes a driver circuit for providing current to the LED. The drive circuit has a thermal protection circuit, which includes a thermistor having a positive thermal coefficient and a switching temperature. The driver circuit also includes a switch-mode power supply (SMPS) controller with an input pin and an output pin. The thermistor is connected to the input pin. When the thermistor temperature is above the switching temperature, the thermal protection circuit causes the SMPS controller to produce a signal with a second duty cycle on the output pin. When the thermistor temperature is below the switching temperature, the thermal protection circuit causes the SMPS controller to produce a signal with a first duty cycle on the output pin. The second duty cycle is higher than the first duty cycle. | 12-08-2011 |
| 20110255268 | LIQUID DISPLACER IN LED BULBS - An LED bulb includes at least one LED mount disposed within a shell. At least one LED is attached to the at least one LED mount. A thermally conductive liquid is held within the shell. The LED and LED mount are immersed in the thermally conductive liquid. A liquid displacer is immersed in the thermally conductive liquid. The liquid displacer is configured to displace a predetermined amount of the thermally conductive liquid to reduce the amount of thermally conductive liquid held within the shell. The liquid displacer is also configured to facilitate a flow of the thermally conductive liquid from the LED mount to an inner surface of the shell. | 10-20-2011 |
| 20110228516 | LIQUID DISPLACEMENT BEADS IN LED BULBS - An LED bulb includes at least one LED mount disposed within a shell. At least one LED is attached to the at least one LED mount. A thermally conductive liquid is held within the shell. The LED and LED mount are immersed in the thermally conductive liquid. A plurality of beads is suspended in the thermally conductive liquid. The plurality of beads is configured to displace a predetermined amount of the thermally conductive liquid to reduce the amount of thermally conductive liquid held within the shell. | 09-22-2011 |
| 20110215728 | CONSTANT POWER LED CIRCUIT - A constant power drive for light emitting diodes, such that there is automatic compensation for variation in forward voltage of the LED, both in a single unit with temperature, and also due to unit-to-unit variations. | 09-08-2011 |
| 20110210669 | END-OF LIFE CIRCUITRY - 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. | 09-01-2011 |
| 20110204777 | SETTABLE LIGHT BULBS - A settable light bulb whose brightness can be set by the user, and more particularly, to the use of a switch or a slide built in to the bulb itself to control the brightness in either discrete or continuous increments. | 08-25-2011 |
