Abstract: In a lighting device (100) comprising an AC light source (14) and a cooling arrangement (52, 62) and a coil (11) for producing a magnetic field for driving the arrangement (52, 62), the coil (11) is serially coupled to the AC light source (14) for making the lighting device (100) more compact. The arrangement (52, 62) comprises a moveable part for displacing a quantity of air or another gas or a fluid. Preferably, the lighting device (100) comprises a further coil (21) for producing a further magnetic field for further driving the arrangement (52, 62), and a phase-shift is introduced between currents flowing through the coil (11) and the further coil (21). The AC light source (14) comprises a combination of a rectifier and a light emitting diode and/or comprises a combination of at least two light emitting diodes combined in an anti-parallel manner.

Abstract: An apparatus for exposing photovoltaic (PV) modules to simulated sunlight for testing purposes, comprising a chamber including a plurality of lamps disposed on a substantially vertical lamp plane, at least one substantially vertical target plane upon which are disposed one or more PV modules, at least one reflector for directing light from the lamps to the at least one target plane, and a cooling system to exhaust heat from the apparatus and maintain the temperature of the PV modules at a predetermined value.

Abstract: A pulsed diode light source driver includes a variable output power supply, an output capacitor, a switchable linear current driver, a temperature sensor, a conditioning circuit, and a voltage monitor. The temperature sensor monitors the temperature of the capacitor while the voltage monitor circuit monitors the output voltage level. The conditioning circuit and the voltage monitor cooperatively control the output voltage of the variable output power supply, so that temperature-related changes in the characteristics of the capacitor are compensated for, and a constant current is maintained through the diode load over a desired range of temperature. The driver is suitable for laser diodes and light emitting diodes.

Abstract: A lighting device comprising a plurality of lighting modules which include a module carrier on which a light source with a plurality of controllable light-emitting diodes emitting light of different wavelengths and arranged on a board, a temperature sensor and a module electronic are arranged. Said module electronic contains a digital circuit with a microcontroller for the local and autonomous signal processing, which actuates the LEDs in dependence on the temperature such that the brightness, color and chrominance of the light mixture composed of the LEDs emitting light of different wavelengths is constant. Said lighting modules being connected with other lighting modules or an external controller via a digital interface for transmitting the board temperature of the respective lighting module detected by means of the temperature sensor. A central master module or the external controller actuates the lighting modules such that a uniform brightness is obtained over the radiating surface.

Abstract: The invention relates to a retrofit LED lamp having an LED module, a driver circuit for supplying power to the LED module, a base for making mechanical and electrical contact with a bulb fitting and a heat sink arrangement for dissipating the heat produced during operation at the LED module and/or the driver circuit. The heat sink arrangement in this case has a metal mount insert consisting of a mount plate with an integrally attached collar, the mount plate bearing, in thermally conductive contact, the LED module, and a transparent upper shell being fitted to the collar of the mount insert in the light exit direction and a thermally conductive lower shell being fitted, in areal contact, in the direction of the base for heat dissipation, said upper shell and said lower shell together forming a housing of the LED lamp which surrounds the LED module and the mount insert.

Abstract: The present disclosure relates to a lighting module wherein a DC-DC converter and an LED module are provided as an integral part of the lighting module, and an AC-DC module is provided separately from the lighting module. The AC-DC module is effectively a remote power supply that can be easily replaced without having to replace, reconfigure, or otherwise modify the lighting module. With this configuration, the DC-DC module may be tuned for the particular LED module of the lighting module, and in the case of a failure of the AC-DC module, the AC-DC module can be replaced without having to replace or retune the DC-DC module.

Abstract: An apparatus has a light emitting diode module that has one or more light emitting diodes each with a light emitting circuitry. The apparatus further has a controller functionally connected with the one or more light emitting circuitries; a housing surrounding the controller and the one or more light emitting circuitries; and a pair of power supply connectors extending outside of the housing and functionally connected with the controller. The controller receives operating power from the pair of power supply connectors and uses the received operating power to control operation of the one or more light emitting circuitries.

Abstract: A modular solid-state lamp has a plurality of replaceable and rearrangeable modules. The modular lamp uses active cooling and passive cooling for thermal management. One cooling system for the modular lamp includes at least one active cooling device and a graphite heat sink in thermal contact with the at least one active cooling device to further enhance the efficiency of the cooling system. The modular solid-state lamp includes at least two modules, a power supply module and a light source module. The power supply module includes a power supply and LED driver that are able to power one or more light source modules. The power supply module further includes sensors that further improve the energy-efficiency of the lamp.

Abstract: A method of configuring an LED driver is disclosed. The LED driver being arranged to provide a supply current to an LED fixture comprising a plurality of LEDs. The method comprises: identifying the LED fixture (LF), sending via a communication network (NTW) a configuration request to a configuration database (DB), receiving configuration data from the configuration database; and configuring the LED driver (LPS) according to the configuration data.

Abstract: A light emitting apparatus comprises a light source array, a diffuser, and a control module. The diffuser is located below the light source for providing the simulated solar light to a test plane. The control module is configured for controlling driving voltages of the light source array. The emission spectrum of the light emitting apparatus complies with a predetermined standard, and the light source array is divided into a plurality of light groups with different wavelength bands according to the predetermined standard. The light groups in the light source array are composed of a plurality of light rows connected in parallel, and each light row of the light group is composed of a plurality of light emitting diodes (LEDs) and a resistor connected in series.

Abstract: A light assembly includes a light source circuit board and a plurality of light-emitting diodes disposed on the light source circuit board. A plurality of light pipes axially extends from and adjacent to each light-emitting diode. Each light pipe has a respective first end adjacent to the plurality of light-emitting diodes and a second end opposite to the light-emitting diodes. The plurality of light pipes communicates light from the light-emitting diodes therethrough and defines a cavity therebetween. A plurality of thermal vanes forms a heat sink for removing heat from the light-emitting diodes. The plurality of thermal vanes extend adjacent to the plurality of light pipes. A driver circuit board is disposed within the cavity.

Abstract: The present invention provides a Scalable Heat Dissipating Microelectronic Integration Platform (SHDMIP) LED Package having excellent heat dissipation and protection to LED, thus extending the lifespan of the LED. The SHDMIP LED package comprises a dual lead frame assembly comprising bottom and top lead frame, protection and driver circuits conductively attached to the bottom lead frame and a LED conductively attached to the top lead frame. The bottom lead frame comprises heat sink pad for heat dissipation purpose. Plurality of SHDMIP LED packages of the present invention can be configured in a matrix or row, forming a SHDMIP LED array for various lighting solutions. A method to manufacture the SHDMIP LED array of the present invention is provided herein.

Abstract: A color temperature tunable white light source comprises: first and second LED arrangements operable to emit light of first and second wavelength range respectively that are configured such that their combined light output, which comprises light generated by the source, appears white in color. One or both LED arrangements comprises a phosphor provided remote to an associated LED operable to generate excitation radiation and to irradiate the phosphor such that it emits light of a different wavelength range, wherein the light emitted by the LED arrangement comprises the combined light from the LED and phosphor. The color temperature of output white light is tunable by controlling the relative light outputs of the LED arrangements by for example controlling the relative magnitude of the drive currents of the LEDs or a duty cycle of a pulse width modulated drive current.

Abstract: Provided are an LED light-emitting module and an illumination apparatus using the same. The LED light-emitting module includes a body frame having a light emitting opening in a direction inclined with respect to a ground surface and a coupling surface to which an LED package is coupled, the body frame including reflective plates extending from opposite sides of the coupling surface to define the light emitting opening, a plurality of heat radiating fins placed on the entire surface of the body frame except for the light emitting opening, and a plurality of LED packages installed on the coupling surface of the body frame such that light radiation angles of the LED packages are adjusted according to an angle by which the coupling surface is bent.

Abstract: A programmable and remotely controlled lighting system employing LED lamps is disclosed herein. The system and methods of the present invention are ideally suited for residential or commercial buildings, court yards, business parks, universities, etc. Initially light sensors are provided to the system measuring available natural and artificial light. A system or area brightness is controlled programmably or remotely via a dimmer with PWM (pulse-width-modulated) power for reduced energy consumption. Wireless command and control is provided by microcontrollers with radio frequency transmitters and receivers. Additional circuitry is included to adequately compensate for transient input voltage.

Abstract: A portable lighting system including a housing having an elongated slot formed in a surface of the housing. The slot being sized to receive a rod therein via an opening in the slot. The system further including a retention member movable between a closed position and an opened position, wherein the closed position provides at least a portion of the retention member blocking at least a portion of the upper opening of the slot and the opened position includes the retention member not blocking the upper opening of the slot. The system also having a light source including a plurality of lights oriented in different directions.

Abstract: Higher power light emitting diode (LED) modules are thermally managed by thermal coupling to a heat sink. An ion wind fan can be used to provide forced convection for the heat sink. In such a light device, in one embodiment the present invention includes electrically connecting the heat sink to the low voltage terminal of the LED driver, thereby controlling the potential of the heat sink.

Abstract: A light assembly, and an associated method, provides color-mixed light generated by light emitter diode elements. A temperature sensor is position to sense temperature levels proximate to the LED light-emitter elements. And, a coolant flow generator is configured in a feedback arrangement to generate coolant fluid to dissipate thermal energy generated during operation of the LED elements to maintain the temperature levels at a constant temperature or within an allowable range.

Abstract: A high-power light-emitting diode (LED) lamp has a plurality of units. Each unit includes an LED die and a thermo-electric cooling device coupled to the LED die. A power source supplies a fixed current to the thermo-electric cooling device wherein the fixed current is based on heat generated by the LED die in normal operation. Accordingly, the unit operates without a controller.

Abstract: A compound light source that compensates for changes in electrical conversion efficiency with increasing operating temperature is disclosed. The compound light source generates light of a design intensity at a design temperature in response to a drive current flowing through the light source. The light source includes a primary light source and a compensating light source. The primary and compensating light sources convert an electrical current passing therethrough to light, each light source being characterized by an electrical conversion efficiency that decreases with increasing temperature and that also decreases with increasing current. The compound light source includes a temperature sensor that measures the temperature of the primary light source and a current splitting circuit that divides the drive current between the primary and compensating light sources to compensate for the decrease in efficiency of the primary light source with temperature above the design temperature.

Abstract: An alternating current light emitting diode (LED) illumination apparatus includes a heat dissipation plate, a plurality of LED chips, a circuit layer, an encapsulation, at least one electrode located on the heat dissipation plate, and a driving element. The LED chips are categorized into at least two LED chip groups connected in series, and each LED chip group comprises at least two LED chips connected in anti-parallel. The driving element comprises a transformer and a bilateral switch. One end of a first switch of the bilateral switch selectively connects to an output terminal of the transformer to output a selected driving voltage to the LED chips. One end of a second switch of the bilateral switch connects to the first switch and the other end of the second switch selectively connects to a LED chip group or all of the LED chips.

Abstract: A light source that is adapted to replace existing fluorescent tubes in an existing fluorescent light fixture is disclosed. The light source includes a plurality of LEDs mounted on a heat-dissipating structure, first and second plug adapters that mate with the florescent tube connectors of the fluorescent tube the light source is to replace, and a power adapter that converts power from a fluorescent tube ballast presented on the first and second plug adapters to DC power that powers the LEDs. The light source is powered from the output of the existing fluorescent ballast. The light source can utilize the existing metallic enclosure as a heat-radiating surface and/or direct air heat transfer from the surface of the heat-dissipating structure.

Abstract: A light generating device includes: an LED module, a memory, an LED module driving unit, a current controller, a temperature sensor, an operation unit, and a key input unit. The light generating device increases the light emission efficiency.

Abstract: A high illumination LED bulb with a 360-degree full emission angle includes a transparent lamp seat, a transparent lampshade coupled to lamp seat, a support board disposed in a chamber defined by transparent lamp seat and transparent lampshade, a heat dissipating body supported by support board, and first and second light emitting modules. The first light emitting module includes a first substrate disposed on a face of heat dissipating body and at least one LED disposed on first substrate. The second light emitting module includes a second substrate disposed on another face of heat dissipating body and at least one LED disposed on second substrate. The LEDs on first and second substrates can project upper and lower projection lights respectively, and reflected halo formed by projection of upper projection light on transparent lampshade can form side projected halo, thereby a 360-degree full emission angle projected halo can be formed.

Abstract: An LED tube is provided for providing general illumination. The LED tube includes a tubular housing having a clear shield and a heat sink opposite the clear shield. A strip including LED lights, circuitry, and electrical hubs are positioned on the backside of the heat sink under the shield. The housing also includes first and second ends that include portions of a quarter turn locking system to allow multiple housings to be attached to one another for a longer string of lighting. A power source for powering the LED lights, and an end cap may also be attached to the first and second ends of the housing by the quarter turn locking system. The housing or housings may be connected to a wall or the like by the use of one or more clip mounts.

Abstract: An LED lamp includes first and second LED strings connected in parallel to each other and a variable resistor interconnected therebetween. The variable resistor includes a resistance track with resistance coils wound thereon and a slider moveable along the resistance track. One portion of resistance of the variable resistor is connected in series with the first LED string, and the other portion of the resistance of the variable resistor is connected in series with the second LED string. When a position of the slider of the variable resistor is changed, a first electric current flowing through one of the first and second strings is increased, while a second electric current flowing through the other one of the first and second strings is decreased, such that the color temperature of the LED lamp is changed accordingly.

Abstract: An outdoor overhead lamp assembly uses light emitting diodes to provide illumination for an area to be illuminated. The lamp assembly includes a unitary housing, which may be formed from a single casting. The housing includes mechanical mounting structure for mounting the housing to a mast arm. The housing includes an electrical compartment for housing electrical components and connections. Heat sink fins are formed on the integral housing that provide for thermal control of the electronic components and LED modules within the lamp assembly. The LED modules are mounted to aiming platforms within an optical compartment for the assembly. An external lens provides environmental protection for the LEDs and their individual lenses. The housing may also include structures for mounting decorative coverings or “skins” to accommodate different aesthetic requirements.

Abstract: A system embodiment comprises and LED array, an optical plane, optics, a sensor and a controller. The LED array is configured to generate LED light. The optical plane has a plurality of scattering features and with a mixing chamber. The optics is configured to direct the LED light to the optical plane. The plurality of scattering features are configured to reflect a sampled portion of the LED light into the mixing chamber. The mixing chamber is configured to mix the sampled portion of the LED light. The sensor is configured to sense the sampled portion of the LED light received from the mixing chamber. The controller is connected to the sensor and configured to control the LED array using the sensed, sampled portion of the LED light received from the mixing chamber.

Abstract: The invention discloses a light-emitting diode illumination platform. When the form factor and the driving current of the light-emitting diode illumination platform are almost fixed, the light-emitting diode illumination platform could includes a certain quantity of light-emitting diodes to be driven by the driving current to light, and if the light-emitting diode illumination platform alternatively includes more light-emitting diodes, the light-emitting diode illumination platform could be driven by the same driving current to light in higher illumination. Similarly, the light-emitting diode illumination platform could alternatively include light-emitting diodes with high luminous efficiency. Thereby, the light-emitting diode illumination platform of the invention with fixed structure size has the advantage of providing different illumination by equipping with different quantities of light-emitting diodes or with light-emitting diodes with different luminous efficiencies.

Abstract: The improved heat sink system for a lighting fixture includes a conductive mount configured to selectively receive and retain a lighting subassembly. An inner heat sink couples to the conductive mount and is positioned to encompass the lighting assembly. A plurality of cooling fins couple to and extend away from the inner heat sink. An outer heat sink couples to the cooling fins and is offset from the inner heat sink to permit air flow therebetween and over the cooling fins. This enables air convection cooling of the inner heat sink, the outer heat sink and the cooling fins simultaneously to draw heat energy away from the lighting subassembly.

Abstract: Methods, systems, and devices for light emitting diode (LED) lighting, including at least one of a multi-channel LED driver circuit including an electromagnetic interference (EMI) filter and rectification circuit, a power factor correction (PFC) circuit, a current and voltage isolation circuit, a voltage control circuit, and a current control circuit; a printed circuit board (PCB) including one or more surface mount or screw mount LEDs and electrically coupled to the LED driver circuit; a heat sink including an intercooling and ventilation chamber for air or water cooling disposed therein and thermally coupled to the PCB; and a lens housing having one or more lenses integrally formed therein and removably coupled to the heat sink with the lenses disposed over the LEDs.

Abstract: A LED lamp for easy assembly and fixation includes a fixing plate, a vapor chamber, a LED module, an outer frame, and fixing elements. The fixing plate has assembling holes. The vapor chamber has a heat-releasing surface brought into thermal contact with the fixing plate and a heat-absorbing surface opposite to the heat-releasing surface. The LED module includes a circuit board and LEDs arranged on the circuit board. The outer frame is provided with through-holes corresponding to the assembling holes and an accommodating opening corresponding to the LEDs. The fixing elements penetrate the through-holes and the assembling holes respectively to assemble the outer frame with the fixing plate. With this arrangement, the vapor chamber and the LED module can be sandwiched between the outer frame and the fixing plate. Thus, the present invention can be assembled and fixed to a predetermined position with an excellent structural strength.

Abstract: The present disclosure provides a lighting apparatus using a light-emitting diode (LED), which includes: LEDs; a power transfer substrate with the LEDs thereon; a radiating member radiating heat generated in the LEDs; a driver electrically connected to the power transfer substrate and integrally coupled to the power transfer substrate and the radiating member; and a heat insulation layer reducing the amount of heat transferred from the radiating member to the driver. In addition, the present disclosure provides a lighting apparatus using an LED, which further includes a cradle fixed to a given object and detachably fixing a lighting body in which a power transfer substrate with LEDs thereon, a radiating member and a driver have been integrally coupled.

Abstract: Disclosed herein are exterior architectural fixtures employing LED-based light sources that are capable of projecting light over long distances and providing a wide variety of lighting effects with high lumen output. These lighting fixtures have improved heat dissipation properties and are particularly suitable for large-scale façade washing and for illuminating large architectural structures, such as skyscrapers, casinos, and retail establishments, integrating efficient and compact power supply and control components for driving high-intensity LEDs to achieve a vast variety of lighting effects on a large scale.

Abstract: A laser downlight in accordance with the present invention includes: a laser diode for emitting a laser beam; an optical fiber having (i) an incidence end through which the optical fiber receives the laser beam emitted from the laser diode and (ii) an emitting end through which the optical fiber emits the laser beam received through the incidence end; and a light emitting section which emits light in response to the laser beam emitted through the emitting end. This achieves a small laser downlight that produces high luminous flux and consumes low electric power.

Abstract: A retrofit LED lamp assembly for the replacement of light bulbs in optical lamps mounted elevated on support posts is described. The optical lamps have a lamp housing with a reflector secured therein and supporting a light bulb. A glass shade projects the light. The retrofit LED lamp assembly has a support member on which light emitting diodes (LED's) are electrically insulatingly supported to replace the light bulb. An adjustable connection assembly is provided to secure the support member to the reflector. The support member is configured to position the LED's at a predetermined angle and orientation relative to configured reflective surface segments of the reflector whereby to produce a desired oriented photometric light distribution pattern. A heat sink is securable in contact with the support member to dissipate heat. A clear tempered glass lens replaces the glass shade.

Abstract: A LED tube includes a substantially fluorescent-tube-shaped and fluorescent-tube-sized translucent or fluorescent tube having one or more LED components and a current control unit installed therein. Both ends of the LED tube are provided with a pair of contact pins for connecting the LED tube mechanically and electrically to the tube holders of the fluorescent tube lighting fixture. The tube has a safety unit arranged to prevent a voltage from transferring through the tube from its one end to the other until a voltage supplied from the corresponding tube holder of the lighting fixture to the pair of contact pins has been detected at each end of the tube separately. Electric power or switching control of electric power is cross-connected between the ends of the LED tube.

Abstract: A light emitting diode (LED) sign lighter is positioned to illuminate a sign. One or more LED modules on the LED sign lighter are directed toward different portions of the sign. Each LED module is configured with a reflector or over-optic to control the angle of the light emitted toward the sign. Each LED module includes an array of LEDs. The configuration of each LED module within the LED sign lighter helps to reduce the build-up of environmental contaminants on the LED module. The center section of the LED sign lighter includes a compartment for housing electrical components to power the LED modules. Heat sink fins are oriented along the back side of the LED sign lighter to provide thermal efficiency for the LED modules.

Abstract: Lighting systems having unique configurations are provided. For instance, the lighting system may include a light source, a thermal management system and driver electronics, each contained within a housing structure. The light source is configured to provide illumination visible through an opening in the housing structure. The thermal management system is configured to provide an air flow, such as a unidirectional air flow, through the housing structure in order to cool the light source. The driver electronics are configured to provide power to each of the light source and the thermal management system.

Abstract: An electrodeless plasma lamp array structure uses multiple plasma lamps to produce large amounts of electromagnetic radiation (visible, IR, UV, or a combination of visible, IR, and UV). An M by N array configuration is powered by either a single RF power source or multiple RF power sources. The array incorporates controllers to adjust the power delivered from the RF power source to each lamp within the array. By adjusting the delivered RF power, the intensity of electromagnetic radiation that is emitted from each lamp is controlled independently allowing for the creation of an array of lamps that emit electromagnetic radiation of varying intensity levels at different places within the array. Using lamps with different color temperatures as part of the array allows the color temperature and the color rendering index of the illumination to achieve different lighting conditions.

Abstract: The present invention relates to a LED illumination device, capable of being combined with a fluorescent lamp, comprises a connector; a substrate capable of being clamped on a lamp tube; a plurality of light emitting diodes; a driving member; and a rectifying and stabilizing member. With the mentioned structure of the LED illumination device, the LED illumination device is able to be directly fastened on the lamp tube of existed fluorescent lamp, for providing LED illumination and lowering replacement cost and increasing replacement convenience.

Abstract: A light emitting device has: a dispersion light source wherein a plurality of semiconductor laser bars are arranged; and a drive circuit which makes the dispersion light source output at least one pulsed beam by supplying at least one drive pulse to the dispersion light source. In the dispersion light source, a plurality of semiconductor laser bars are arranged on a base, and furthermore, heat dissipating plates are arranged between the semiconductor laser bars. The pulse width of the pulsed beam outputted from the dispersion light source is longer than 1 femtosecond but shorter than 0.25 second, and the energy of the single pulsed beam is less than 66.8 ?[J].

Abstract: A LED backlight module includes a substrate, a heat-dissipating plate, a LED string and a backlight driving circuit. The LED string includes plural LEDs. The LED string further includes a positive driving terminal, a negative driving terminal and a connecting terminal. A positive output terminal, a negative output terminal and a zero voltage terminal of the backlight driving circuit are respectively connected with the positive driving terminal, the negative driving terminal and the heat-dissipating plate, so that a positive driving voltage and a negative driving voltage are generated by the backlight driving circuit to drive illumination of the LED string. A first number of LEDs of the LED string are electrically connected between the connecting terminal and the positive driving terminal. A second number of LEDs of the LED string are electrically connected between the connecting terminal and the negative driving terminal.

Abstract: A luminaire includes a primary HID light source housing having at least one selectively powerable HID lamp and an LED arm assembly having a secondary LED light source. In some embodiments the LED arm assembly may extend between a support structure and the HID light source housing and in other embodiments the LED arm assembly may be a stand alone assembly and extend from a support structure remote from the HID light source housing. The HID lamp may be powered during user selected peak hours and the LED light source may be powered during user selected non-peak hours.

Abstract: The invention relates to the technical field of illumination lamps, in particular to an LED bulb. The invention comprises a lamp cap, a lampshade, LEDS and a circuit board, wherein the bottom end of the lampshade is mounted and fixed at the top end of the lamp cap; the circuit board is mounted and fixed in the lampshade and also electrically connected with the lamp cap; and the lampshade is filled with a mixed gas which transfers heat produced by the LEDS outside the bulb. The invention transfers heat produced by the LEDS by a mixed gas; the LED bulb has such advantages to as small weight, small volume and low production cost; besides, by using the mixed gas as heat transfer medium, the invention can radiate heat produced by the LEDS outside the bulb rapidly so as to effectively solve the heat radiation issue of the LEDS and prolong the service life of the LEDS.

Abstract: A tubeless light-emitting diode (LED) based lighting device includes at least one base, at least one LED lighting module, and at least one control circuit. The base includes a heat dissipation body. The LED lighting module is mounted to the base so that the base provides the LED lighting module with the functions of retention and heat dissipation. The control circuit is mounted to the base and is electrically connected to power wiring of the LED lighting module for ON/OFF switching of the LED lighting module and supplying of operation power. As such, a tubeless lighting device that emits light in a power saving manner and is constructed in a volume reduced manner is provided.

Abstract: An LED lamp for outdoor and large space lighting, particularly for streets, warehouses car parks and the like, is adapted for fitting into legacy light fittings designed for sodium bulbs and the like. The LED lamp comprises a plurality of light emitting diodes arranged over a surface of the lamp, is rotatably connected through a rotatable electrical connection to a screw-in adaptor for insertion into a legacy screw-in socket, such that the screw in adaptor is rotatable independently of the lamp, so that the legacy screw in socket can be used even though the light fitting is too small to allow rotation of the LED lamp. Additional embodiments provide for cooling airflow through the light fitting, for temperature control of the LEDs, and for failure protection, to ensure a longest possible lamp lifetime.

Abstract: A light emitting element circuit according to the present invention includes: a plurality of LED chains connected in parallel to each other, each of the plurality of LED chains including LEDs that are a plurality of light emitting elements connected in series; a transistor that is a reference element connected in series to the LED chain being one of the plurality of LED chains; and transistors that are one or more subordinate elements respectively connected in series to the LED chains among the plurality of LED chains except for the LED chain, a control voltage thereof following a control voltage of the transistor, wherein the transistor takes a voltage of a predetermined node on the LED chain as the control voltage.

Abstract: According to various embodiments of the invention, an LED lighting system is providing having a replaceable driver module. In some embodiments, the replaceable driver module comprises a component that is physically attachable to an LED illumination module, whereby the attached components have a combined physical profile dimensioned for installation in a pre-existing light fixture. In further embodiments, the combined system's dimensions allow it to be installed in pre-existing fluorescent fixtures without requiring rewiring of the fixtures. In some embodiments, the LED driver module may be configured to condition power received from a fluorescent light ballast to drive the LEDs such that a pre-existing fluorescent ballast does not need to be removed. In other embodiments, the LED driver may be configured to condition main power such that a pre-existing fluorescent ballast may be removed.

Abstract: According to various embodiments of the invention, an LED lighting system is providing having a replaceable driver module. In some embodiments, the replaceable driver module comprises a component that is physically attachable to an LED illumination module, whereby the attached components have a combined physical profile dimensioned for installation in a pre-existing light fixture. In further embodiments, the combined system's dimensions allow it to be installed in pre-existing fluorescent fixtures without requiring rewiring of the fixtures. In some embodiments, the LED driver module may be configured to condition power received from a fluorescent light ballast to drive the LEDs such that a pre-existing fluorescent ballast does not need to be removed. In other embodiments, the LED driver may be configured to condition main power such that a pre-existing fluorescent ballast may be removed.