Abstract: An electronic device includes a cover member rotatably connected to a base member. A magnetic lock is located on a working surface of the base member. A touch-sensitive bar is located on a side surface of the base member. When the cover member and the base member are closed, the magnetic lock provides a magnetic attraction between the cover member and the base member. When the touch-sensitive bar detects a touch gesture input by a user and the touch gesture matches a predefined touch gesture, the magnetic lock releases the magnetic attraction between the cover member and the base member.

Abstract: A portable electronic device includes first and second device units and at least one hinge assembly configured to pivotably connect the second device unit to the first device unit. The hinge assembly includes a first fixing unit configured to be fixed to the first device unit, a second fixing unit configured to be fixed to the second device unit, a plurality of shaft members configured to be arranged in parallel with one another and to include first and second outer shaft members respectively mounted on the first and second fixing units and a plurality of inner shaft members arranged between the first and second outer shaft members, and a gear unit mounted on the shaft members to connect the plurality of shaft members with one another through a gear mesh.

Abstract: A drawer assembly includes a carrier frame and a sliding basket mounted in the carrier frame and movable in forward-backward direction relative to the carrier frame. The carrier frame includes a front open frame, a rear open frame, a first supporting rod and a second supporting rod. The first and second supporting rods are respectively connected between the front open frame and the rear open frame. The sliding basket includes a first limiter member disposed at one lateral side relative to the first supporting rod and defining a first concave portion and a first stop portion connected to the first concave portion. The first stop portion is disposed at the bottom side of the first supporting rod. Thus, the sliding basket is escaping out of the carrier frame in upward direction.

Abstract: A refrigerator having French-style doors is sealed between the doors by a first sealing pad linearly biased from a base fixed within a recess provided in an inner side portion of one door, and a second sealing pad carried by a mounting arm which is pivotally mounted and angularly biased from an inner side portion of the second door. When either door is closed against the other, the first and second sealing pads deflect and conform to each other to provide an effective seal. In one preferred embodiment of the invention, the first and second sealing pads take complementary concave and convex shapes which provide a larger cross-section for the overall sealing area and establish a high insulation value, while avoiding the need for an internal heater commonly employed in refrigerator doors.

Abstract: A liner for an appliance is formed by a plastic sheet formed into a three dimensional shape corresponding to at least a portion of a compartment of the appliance. A plurality of electrically conductive ink pathways are applied on a surface of the plastic sheet, and a sealer material is applied to the plastic sheet to cover said pathways.

Abstract: Illustrative embodiments of systems and methods for powering lighted shelves in refrigerator appliances are disclosed. In one embodiment, a refrigerator appliance may comprise a cabinet having a temperature-controlled compartment defined therein and a plurality of electrical connectors disposed at a plurality of shelf mounting positions within the temperature-controlled compartment. The refrigerator appliance may also comprise a plurality of adjustable shelves each carrying at least one light emitting diode (LED), where each of the plurality of adjustable shelves may be removably mounted in one of the plurality of shelf mounting positions such that the at least one LED is electrically coupled to one of the plurality of electrical connectors. The refrigerator appliance may further comprise a power supply circuit that is electrically coupled to the plurality of electrical connectors and that is configured to selectively supply power to only a subset of the plurality of electrical connectors.

Abstract: According to one embodiment, a lamp device includes a base body, a light-emitting module and a lens unit. The base body includes a recess part. The light-emitting module includes a board mounted with a light-emitting element. The board is arranged in the recess part. The lens unit includes a metal surface member to hold a lens. The surface member is arranged in the recess part and is thermally coupled to the base body and the board.

Abstract: A plasma generator according to an embodiment of the present invention is provided to generate a high density and stable plasma at near atmospheric pressure by preventing a transition of plasma to arc. The plasma generator includes a plate-shaped lower electrode for seating a substrate; and a cylindrical rotating electrode on the plate-shaped lower electrode, wherein the cylindrical rotating electrode includes an electrically conductive body that is connected to a power supply and includes a plurality of capillary units on an outer circumferential surface of the electrically conductive body; and an insulation shield layer that is made of an insulation material or a dielectric material, exposes a lower surface of the plurality of capillary units, and shields other parts.

Abstract: A plasma generator has a dielectric with a through hole and has a first electrode and a second electrode provided in the dielectric. The first electrode surrounds the through hole when viewed in the penetrating direction of the through hole. The second electrode includes a downstream region which is positioned further toward one side of the through hole in the penetrating direction of the through hole than the first electrode. When viewed in the penetrating direction of the through hole, the downstream region surrounds the through hole and is further away toward the outer circumferential side from the inner circumferential surface of the through hole than the first electrode.

Abstract: An improved mercury dosing composition is described. A method for dispensing mercury with this composition and to discharge lamps containing each composition is also described.

Abstract: The present invention relates to the field of flash tubes for photographic use, in particular to a flash tube comprising a trigger element for triggering a flash in the flash tube. Accordingly, a flash tube is provided.

Abstract: A high power RF device has an electron beam cavity, a modulator, and a circuit for feed-forward energy recovery from a multi-stage depressed collector to the modulator. The electron beam cavity include a cathode, an anode, and the multi-stage depressed collector, and the modulator is configured to provide pulses to the cathode. Voltages of the electrode stages of the multi-stage depressed collector are allowed to float as determined by fixed impedances seen by the electrode stages. The energy recovery circuit includes a storage capacitor that dynamically biases potentials of the electrode stages of the multi-stage depressed collector and provides recovered energy from the electrode stages of the multi-stage depressed collector to the modulator. The circuit may also include a step-down transformer, where the electrode stages of the multi-stage depressed collector are electrically connected to separate taps on the step-down transformer.

Abstract: A driver circuit for programmable solid state light bulb assemblies including light emitting diodes is operable to provide a drive current to a light source of the light bulb assembly. The controller comprises a data storage unit storing a test scenario for calibration of the light bulb assembly; wherein the test scenario indicates a sequence of states of the light source; wherein a state of the light source is associated with settings of the driver circuit; a data input unit receiving a command signal via a modulated electricity supply signal; and a data processing unit retrieving the test scenario from the data storage unit; in dependence of the received command signal, generating a control signal for operating the light source in at least one state of the sequence of states of the test scenario; and to output the control signal.

Abstract: Controllers for driver circuits of solid state light bulb assemblies including light emitting diodes comprise a power converter, a data storage unit operable to store data items relating to an operating behavior of the light bulb assembly, a temperature sensor operable to determine a chip temperature of the controller, and a data processing unit operable to receive the chip temperature, to retrieve the stored data items from the data storage unit, to generate a control signal in dependence upon the chip temperature and the retrieved data items, and to output the control signal to the power converter for operation of the light source.

Abstract: The invention relates to a method for calibrating at least one headlamp (2, 3) and/or at least one element of a headlamp, particularly on a motor vehicle (1), using the illumination structure that is contained in the light distribution of the headlamp or of the element of the headlamp, with an image data acquisition unit (6) and a control unit (7), wherein the illumination structure of at least one headlamp (2, 3) and/or of at least one element of a headlamp is formed between a dark area (9) and a light area (10), such as a dark/light boundary, and the image data acquisition unit (6) detects an, in particular retro-reflective, object (13) when changing from the dark area (9) to the light area (10), wherein also the absolute position of the object (13) upon entry into the light area (10) is determined and this is used to determine an actual setting of the at least one headlamp (2, 3) or of the at least one element of a headlamp. The invention also relates to an apparatus in this regard.

Abstract: An LED light includes a light body; an LED light board disposed in the light body and disposed thereon a plurality of LED dies; at least one battery coupling member, which is a detachable battery carrier, disposed at an outside edge of the light body for accommodating therein a battery device which is a replaceable element; and a power switch control circuit disposed in the light body and electrically coupled to an alternate current source, the at least one battery coupling member and the LED light board so that either of an alternate current received from the alternate current source and a direct current received from the battery device is transmitted to the LED light board. The replaceable battery device disposed at the outside edge of the light body and used as a backup power supply for emergency illumination is simple in structure and low in cost.

Abstract: A handheld device includes a backlight driving unit and a power supply circuit for powering the backlight driving unit. The power supply circuit includes a power management unit, a battery, a first electronic switch, a second electronic switch, and a control unit. When a voltage of a second terminal of the second electronic switch is less than a reference voltage of the control unit, the control unit turns on the first electronic switch and turns off the second electronic switch. The backlight driving unit is powered by the battery through the first electronic switch. When the voltage of the second terminal of the second electronic switch is more than the reference voltage of the control unit, the control unit turns off the first electronic switch and turns on the second electronic switch. The backlight driving unit is powered by the PMU through the second electronic switch.

Abstract: According to embodiments, an inner electrode having a plurality of gas holes includes a first contact surface provided to a part of an outer peripheral surface. An outer electrode includes a second contact surface provided to a part of an inner peripheral surface, corresponding to the first contact surface of the inner electrode. The inner electrode and the outer electrode come into contact with each other on the first and second contact surfaces. A brazing filler metal is filled in a brazing filler metal filling hole that reaches from front side main surfaces of the inner electrode and the outer electrode to the contact surfaces to join the inner electrode and the outer electrode.

Abstract: The present invention relates to a plasma source which is arranged in floating fashion on a vacuum chamber, wherein the plasma source comprises a source housing, and a filament is provided in the source housing and is arranged so as to be insulated therefrom, wherein means for measuring the potential drop between the source housing and the filament are provided. The measured potential drop can be used for regulating the voltage heating the filament. According to the invention, corresponding means are provided.

Abstract: A plasma source comprising an RF coupling system, magnets or coils that generate magnetic fields, a gas injection system, and a vacuum tight RF transparent gas containment tube, wherein said RF coupling system comprises an RF coupler and said plasma source further comprises a choke point wherein the ratio of the field strength at said choke point to the field strength at said RF coupler is greater than two.

Abstract: Embodiments of the present application disclose a linear plasma source applied to the field of solar cell production. A linear plasma source comprising a housing which forms a reaction chamber having an outlet; a gas intake system comprising an internal pipeline which is mounted on the housing and located inside the reaction chamber for releasing reaction gas into the reaction chamber; an electrode system comprising at least two electrode plates which are mounted on the housing and located around the internal pipeline within the reaction chamber; and an electromagnetism system comprising an electromagnetic coil, and the electromagnetic coil is mounted at the outlet of the reaction chamber of the housing and has a plasma outlet. The embodiments of the present application have a simple structure, a low production cost, a good uniformity and a high film compactness.

Abstract: A temperature controlled dielectric window of an inductively coupled plasma processing chamber includes a dielectric window forming a top wall of the plasma processing chamber having at least first and second channels therein. A liquid circulating system includes a source of cold liquid circulating in a first closed loop which is not in fluid communication with the channels, a source of hot liquid circulating in a second closed loop which is in fluid communication with the channels, and first and second heat exchangers. The cold liquid passes through the first heat exchanger at a controllable flow rate and temperature of the hot liquid is adjusted by heat exchange with the cold liquid as the hot liquid passes through the first heat exchanger and then through the inlet of the first channel.

Abstract: A control system is disclosed for determining an actual temperature of a light emitting diode. The control system uses conductor that supply power to the light emitting diode to supply a pulse to the light emitting diode. The pulse is determined along with a reaction caused by the pulse and the information gained is used in determination of the light emitting diode die temperature which can then be used in controlling current to the light emitting diode to control the temperature of the light emitting diode.

Abstract: A drive circuit is a drive circuit for turning on an LED and includes a self-excited inverter supplying power to the LED, wherein the self-excited inverter includes thermistors, and supplies, depending on temperature dependency of the thermistors, the first power value to the LED when a temperature is the first temperature, and the second power value to the LED when a temperature is the second temperature higher than the first temperature, and the second power value is smaller than the third power value that a circuit which is not provided with the thermistors and supplies the first power value to the LED when the temperature is a first temperature supplies to the LED when a temperature is the second temperature.

Abstract: The present invention is directed to an electrical wiring device that includes at least one circuit configured to provide an output signal in response to at least one external input signal. The device further comprises a light emission and detection assembly that includes: a lamp sub-assembly coupled to the at least one circuit, the lamp subassembly including at least one light emitting element configured to emit light in response to the output signal; and an ambient light sensor sub-assembly coupled to the at least one circuit and including an ambient light sensor and a sensor housing assembly, the ambient light sensor being configured to generate the at least one external input signal in response to sensing an ambient light level in the space, the sensor housing assembly being configured to substantially isolate the ambient light sensor from the light emitted by the lamp sub-assembly.

Abstract: A light emitting module includes a plurality of light emitting device packages configured to be sequentially turned on or off according to the level of external drive voltage and connected to one another in series. Each of the plurality of light emitting device packages includes a light emitting cell having at least one light emitting device, and an on/off controller configured to control to turn the light emitting cell on or off.

Abstract: Illuminated moldings with integrated control are provided. The illuminated moldings with integrated control use low voltages, are energy efficient and easy to install and use. The illuminated moldings with integrated control may be attached to various surfaces of different objects. The illuminated molding is insulated and does not carry electricity, and can be placed under water with never a risk of shock even if something damages or cuts the molding. Further, the illuminated moldings with an integrated control allow a user to control various illumination characteristics and effects such as the turn on or turn off time, the color, the brightness, the transition between various operation modes. The integrated control may be wired or wireless.

Abstract: This disclosure describes techniques for outputting light with a controlled spatial intensity distribution. According to some examples, this disclosure describes a device that includes at least one LED matrix that includes a plurality of LED elements. According to these examples, the device controls the LED elements of the LED matrix to output the light by causing at least a first LED element of the LED matrix to output light of a first intensity, and causing a second LED element of the LED matrix to output light of a second, different intensity. In some examples, the device controls the first at least one LED element to output light of the first intensity to illuminate a first object, and controls the second LED element to output light of the second intensity to illuminate a second object. The second object may have a different location than the first object.

Abstract: A tunable light-emitting diode (LED) lamp for producing an adjustable light output is provided. In one embodiment, the LED lamp includes a drive circuit for driving LED dies in one of a plurality of light output configurations (e.g., a pre-sleep configuration, a phase-shift configuration, and a general lighting configuration). Further, the LED lamp may include an output select controller and/or input sensor electrically coupled to the drive circuit to select the light output configuration. As such, the LED lamp is tunable to generate different levels of spectral output, appropriate for varying biological circumstance, while maintaining a commercially acceptable light quality and color rendering index.

Abstract: A programmable lighting control system integrates time-based, sensor-based, and manual control of lighting and other loads. The system includes one or more groups of controlled lighting areas, which may be, e.g., floors of a building. Each group may have one or more lighting zones, which may be, e.g., individual rooms or offices on a building floor. Each lighting zone includes occupancy and/or daylight sensors that may be wirelessly coupled to a gateway of the group. Each gateway is coupled to a network, such as, e.g., a local area network (LAN). Control software, residing on a computer (e.g., a personal computer or a server) coupled to the network and accessible via the network, remotely communicates with and controls the lighting zones either individually, groupwise, or globally. Each lighting zone can also be locally controlled at the gateway and can function independently of the control software and the gateway.

Abstract: An intelligent illuminating device includes at least one lamp being installable onto an object, the lamp having at least one light emitting unit and at least one light collecting unit, a light beam of the light emitting unit being projected out as the lamp turned on, the light collecting unit corresponding to a targeted region, each light collecting unit having a MCU and a PWM unit. Under this arrangement, when the light collecting unit acquires the brightness value of the targeted region, the brightness value is transmitted to the MCU and compared with a predetermined brightness value, so that a difference value is obtained and transmitted to the PWM unit; hence, the light emitting unit is controlled by the PWM unit to project a light beam with a designated intensity.

Abstract: A multi-level automation control architecture, methods, and systems are disclosed, which provide enhanced scalability, functionality, and cost effectiveness for energy, access, and control. The systems include various combinations of automation controllers, remote controllers and peripheral devices that are used to provide monitoring and control functionality over the various systems in a structure, such as HVAC, water, lighting, etc. In various embodiments, the automation controller and various peripheral devices are implemented to provide an integrated energy management system for the structure. The system allows the user to manage energy based on the day, time, the presence of people, and the availability of natural lighting and heating, as well as prioritize and participate in demand-response program.

Abstract: A track head unit includes a lighting device, a first sensor, a second sensor, one or more motors, and a controller. The first sensor is configured to receive transmissions from a portable remote control device. The second sensor is configured to receive transmissions associated with a target object. The one or more motors are mechanically coupled to the lighting device and are configured to position the lighting device along a first direction and a second direction. The controller is coupled to the lighting device, the first sensor, the second sensor, and the one or more motors. The controller is configured to receive a control signal from the remote control device via the first sensor, responsively transmit a locator signal to a locator that is disposed at a target object, receive a response signal via the second sensor from the remote object in response to the transmitting, and based upon the response signal, actuate the motors to aim the lighting device at the target object.

Abstract: A solid state lighting apparatus can include a first string of Light Emitting Diodes (LEDs) that is configured to operate in response to a rectified ac voltage having a cycle including a null time interval when the first string is off and a second string of LEDs, that is separate from the first string of LEDs, and can be configured to emit light during at least a portion of the null time interval.

Abstract: An LED lighting device includes a first luminescent device, a second luminescent device, a first current controller and a second current controller. The first current controller is coupled in parallel with the first luminescent device and configured to operate according to a first current setting, a switch-on voltage and a switch-off voltage. The second current controller is coupled in series to the second luminescent device and configured to operate according to a second current setting. The first current setting, the second current setting, the switch-on voltage and the switch-off voltage are adjusted by setting the mode selection pins of the first and second current controllers.

Abstract: An apparatus comprises red, green and blue LED strings each having a corresponding switching circuit. Each LED string is divided into a plurality of LED segments. The three LED strings are connected in parallel or in series. Each LED string may be connected in series with a respective current source or share a common current source. A controller controls each switching circuit so that the number of LED segments connected in series in the red, green or blue LED string can be respectively controlled according to a color setting signal and the voltage level of an input voltage. A first control method is provided for controlling the apparatus having a constant input voltage and a second control method is provided for controlling the apparatus having a periodically time-varying input voltage.

Abstract: Illumination devices (10), systems and methods that convert an alternating current (AC) supply (14) to a direct current (DC) for powering a plurality of light emitting diodes (LEDs) are disclosed. An illumination device (10) comprises a full wave rectifier (12) for converting the AC supply into a direct current (DC). A current limiting diode (CLD) module (16), comprising at least one CLD is coupled in series to an output of the full wave rectifier and a light emitting diode (LED) module (18) comprising a plurality of LEDs is coupled in series between an output of the CLD module (16) and the full wave rectifier (12).

Abstract: A circuit for flicker suppression in a Light Emitting Diode (LED) has a latch. The latch has a first state set with a trailing edge of Pulse Width Modulated Dimming (PWMD) pulse, and a second state set delayed with respect to the PWMD trailing edge. A trigger circuit is coupled to the latch. The trigger circuit sends a signal to the latch to change to the second state when a decision point occurs during a time following a duty limit Dmax of a gate of a LED driver circuit.

Abstract: A dimmable LED illumination system includes a LED lamp, a switch, and a driver. The LED lamp receives electric signals to emit light; the switch is connected to a power source, and generates a pulse signal by being turned off and then on again in a predetermined time; the driver connects the switch to the LED lamp to convert electric power of the power source into the electric signals which are supplied to the LED lamp when the switch is turned on. In addition, the driver saves a setting luminance, a default illumination mode, and a luminance adjustment mode. When the driver receives the pulse signal, one of the two modes is selected to light the LED lamp.

Abstract: A LED driver system (1) comprises a current source (4) which supplies a power supply current (i) to a parallel arrangement of a parallel switch (20) and a LED (10). The parallel switch (20) short-circuits the LED (10) when it is closed. A controller (15) generates during use: (i) a first control signal (E) to control the current source (4) to change from a regulating mode wherein the power supply (i) current is regulated to have a non-zero average level into a decaying mode wherein the power supply current (i) decays during a decay period (Td), and (ii) a second control signal (CSO) to control the parallel switch (20) to open during an open period (To) comprising a sub-period of the decay period (Td).

Abstract: A programmable luminaire system may comprise a programmable luminaire comprising an optic defining an optical chamber, a light source comprising a plurality of light-emitting elements, a controller operably coupled with the plurality of light-emitting elements, and an electrical connector electrically coupled with the controller. The system may further comprise a computerized device configured to electrically communicate with the programmable luminaire. The computerized device may be configured to transmit data to the programmable luminaire. The programmable luminaire may be configured to receive the data from the computerized device at the electrical connector. The controller may be configured to be programmed responsive to the data received by the controller.

Abstract: Representative embodiments of the invention provide a system, apparatus, and method of controlling an intensity and spectrum of light emitted from a solid state lighting system. The solid state lighting system has a first emitted spectrum at a full intensity level and at a selected temperature, with a first electrical biasing for the solid state lighting system producing a first wavelength shift, and a second electrical biasing for the solid state lighting system producing a second, opposing wavelength shift. Representative embodiments provide for receiving information designating a selected intensity level or a selected temperature; and providing a combined first electrical biasing and second electrical biasing to the solid state lighting system to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum over a predetermined range of temperatures.

Abstract: A system including first and second lamps, one of an inductor or a transformer, first and second switches, and a control module. The first lamp generates a first output of light having a first color. The second lamp generates a second output of light having a second color. The first and second outputs of light are mixed to provide a mixture of light having a third color. The transformer includes first and second coils. The first and second coils supply power respectively to the first and second lamps. The first and second switches are connected respectively to the first and second coils. The control module alters the third color by controlling (i) a state of the first switch to adjust a first amount of current supplied to the first lamp, and (ii) a state of the second switch to adjust a second amount of current supplied to the second lamp.

Abstract: Provided are circuits and methods for a digital controller for an electronic ballast for a fluorescent lamp, comprising a feed-forward loop that provides information about a voltage firing angle, and a pulse width modulator that controls a duty ratio of at least one power switch of the electronic ballast according to the information. The digital controller may include a duty ratio controller implemented in the pulse width modulator. The digital controller may include one or more functions such as dimming, maintaining high power factor throughout the dimming range, low lamp power detection, lamp soft-start, and DC-link capacitor over-voltage detection for end of life protection or lamp failure protection. In one embodiment the ballast is a single stage, single switch ballast.

Abstract: A driver circuit of solid state light bulb assemblies including light emitting diodes comprises a first power converter stage converting an input voltage into an intermediate voltage; a second power converter stage converting the intermediate voltage into a drive voltage for the light source; and a controller. The controller comprises a first control unit generating a first control signal for the first power converter stage; a second control unit generating a second control signal for the second power converter stage; and a state control unit determining a target state of the light source; wherein the first and second control units are receiving information indicative of the target state; and wherein the first and second control units are generating the first and second control signals based on the information indicative of the target state.

Abstract: According to one embodiment, an LED lighting device comprises at least one normally-on type switching element, an output generation unit that generates DC output by an on-off operation of the switching element, a semiconductor light emitting element that is lit by the DC output generated by the output generation unit, and a driving control unit that causes the switching element to perform an off operation using a current passed through the semiconductor light emitting element.

Abstract: The present invention is directed to a device for regulating an amount of electrical power provided to at least one electrical load, the device comprising a control circuit disposed in the housing and including at least one switch device movable between a first switch state and a second switch state. The control circuit further includes a power control element that has a power control actuator configured to adjust the amount of power provided to the at least one electrical load. A variable control actuator is accessible to the user via the control aperture and coupled to the power control actuator via a linkage structure. The linkage structure further includes a pin and channel arrangement configured to convert a user control action into a power control actuator adjustment by translating rotational motion into linear motion or linear motion into rotational motion.

Abstract: A linearly dimming circuit of a light-emitting device, includes a diming signal processing unit, having a dimming signal input terminal and a current setting output terminal, wherein the dimming signal input terminal receives a luminance percentage setting to set a luminance of the light-emitting device to be a maximal luminance multiplying the luminance percentage setting, the dimming signal processing unit generates a current percentage setting according to the luminance percentage setting, the current setting output terminal outputs a driving current setting which sets the driving current to be a maximal driving current multiplying the current percentage setting; a light-emitting device driver stage, having a current setting input terminal and a driving current output terminal, wherein the current setting input terminal couples to the current setting output terminal and receives the driving current setting, the driving current output terminal outputs the driving current to the light-emitting device.

Abstract: A dimmable LED lamp, which receives power from a DC power source to emit light, includes a main body, a DC/DC converter, and a LED module; wherein the main body is hollow, and includes a conductive portion made of a conductive material, wherein the conductive portion is connected to the DC power source; the DC/DC converter is provided in the main body, and is electrically connected to the conductive portion of the main body to receive a power from at least a DC power source; the DC/DC converter converts a voltage of the power provided by the DC power source into a corresponding current; the LED module is provided on the main body, and is electrically connected to the DC/DC converter to emit light with luminance corresponding to the current received from the DC/DC converter.

Abstract: A dimmable LED illumination system includes a power converting circuit and a lamp. The power converting circuit is electrically connected to a power source to convert electric power of the power source into a voltage signal. The lamp includes a DC/DC converter and a LED module, wherein the DC/DC converter is electrically connected to the power converting circuit to convert the voltage signal into a corresponding current signal. The LED module is electrically connected to the DC/DC converter to be driven by the current signal to emit light. By adjusting a voltage provided by the power converting circuit, a current provided by the DC/DC converter could be adjusted as well, which changes a luminance of the LED module.