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Charged particle accelerators, radiation sources, systems, and methods

Patent Number: 8111025
Publication Date: 2012-02-07
Inventors: Whittum, David; Clayton, James E.; Merdinian, George

Man-portable radiation generation sources and systems that may be carried by hand to a site of interest by one or two people, are disclosed. Methods of use of such sources and systems are also disclosed. Battery operated radiation generation sources, air cooled radiation generation sources, and charged particle accelerators, are also disclosed. A radiation generation source with a target less than 0.20 mm is also ...

Programmable radio frequency waveform generator for a synchrocyclotron

Patent Number: 8111024
Publication Date: 2012-02-07
Inventors: Gall, Kenneth; Sliski, Alan

A synchrocyclotron comprises a resonant circuit that includes electrodes having a gap therebetween across the magnetic field. An oscillating voltage input, having a variable amplitude and frequency determined by a programmable digital waveform generator generates an oscillating electric field across the gap. The synchrocyclotron can include a variable capacitor in circuit with the electrodes to vary the resonant frequency. The synchrocyclotron can further include an injection electrode and ...

Control system for different colors of light emitting diodes

Patent Number: 8111023
Publication Date: 2012-02-07
Inventors: Sun, Tai-Ping; Wang, Chia-Hung; Hung, Tzu-Lun; Yan, Heng-Yu

A control system includes a clock unit for providing a first clock signal, and a second clock signal having a frequency lower than that of the first clock signal. Three control units are coupled respectively to three light emitting diodes (LED) emitting respectively three different colors. Each control unit is operable based on the clock signals and a corresponding set of first and second reference values to output a driving pulse signal to a corresponding LED such that the corresponding ...

Lighting system comprising interconnectable lighting modules

Patent Number: 8111022
Publication Date: 2012-02-07
Inventors: Snijder, Pieter Jacob; Welschen, Johannes Martinus Maria; Zwanenberg, Victor J.; Hiddink, Martin Gerard Hendrik; Deurenberg, Pieter Hubertus Franciscus

This invention relates to a lighting system. The lighting system includes a plurality of interconnectable polygonal lighting modules, wherein each lighting module has a plurality of connection members each including at least one electrical terminal. The connection members are arranged rotationally symmetrically at the lighting module. The lighting system further includes bridge members. Each bridge member has bridge terminals and is mountable at neighboring connection members of different ...

Lighting system and a method for controlling a lighting system

Patent Number: 8111021
Publication Date: 2012-02-07
Inventors: Snijder, Pieter Jacob; Bergman, Anthonie Hendrik; Cowan, Gerritjan Henri

A method of controlling a lighting system includes a learning procedure. The lighting system includes lighting modules and a controlling device. The lighting modules are arbitrarily arranged, and each lighting module can communicate with neighboring lighting modules via communication units arranged at sides of the lighting module. The learning procedure defines a lighting module arrangement and a communication network for communication between the controlling device and the lighting ...

Apparatus and method for driving backlight unit

Patent Number: 8111020
Publication Date: 2012-02-07
Inventors: Furukawa, Norimasa; Ichikawa, Hiroaki; Kikuchi, Kenichi

The present invention is directed to a drive apparatus for a backlight unit (20) in which plural LED (Light Emitting Diode) elements are cascade-connected every three primary colors, which comprises a signal generating unit (44) for generating a signal having an arbitrary amplitude, an adjustment unit (50) for adjusting light emission quantities of groups of LED elements (30) on the basis of the signal which has been generated by the signal generating unit ...

Sensing type control circuit for electronic apparatus

Patent Number: 8111019
Publication Date: 2012-02-07
Inventor: Kuo, Fu-Rung

A sensing type control circuit for an electronic apparatus is provided. An output unit is coupled between an external power source and the electronic apparatus and provides varied power supply to the electronic apparatus according to a control signal. A switch is coupled between the external power source and the output unit and disconnects or connects the external power source. A control unit receives a sensing signal and generates the control signal to the output unit according to the ...

Application infrastructure for constructing illumination equipments with networking capability

Patent Number: 8111018
Publication Date: 2012-02-07
Inventor: You, Tung-Hsin

An application infrastructure for constructing illumination equipments with a transmission function includes at least one lamp reporting device for reporting a lamp condition, at least one lamp detection and transmission module with a two-way communication function, at least one message transmission and receiving module coupled to a control system, and a main system. Through a built-in wireless network or a power line network function of the illumination equipments, data can be transmitted ...

Circuits and methods for controlling dimming of a light source

Patent Number: 8111017
Publication Date: 2012-02-07
Inventors: Kuo, Ching-Chuan; Lin, Yung Lin

A controller for controlling dimming of a light source includes a detection pin, an input signal pin, and a monitoring pin. The detection pin is operable for monitoring a rectified voltage and for detecting whether the rectified voltage comes from a TRIAC dimmer or an on/off switch dimmer. The input signal pin is operable for receiving an input signal indicative of the rectified voltage and the controller controls dimming of the light source according to the input signal if the rectified ...

Control system for multiple fluorescent lamps

Patent Number: 8111016
Publication Date: 2012-02-07
Inventors: Bai, Shwang-Shi; Liang, Shen-Yao; Huang, Yu-Pei

The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital method, an analog method, or a mixture of the two methods. In a digital method, phase shifts are generated by digital circuits comprising counters, a divider, an adder, and a comparator. The digital circuits analyze the signal and use the necessary information to form a series of phased driving signals. In an analog method, phase shifts ...

Brightness-adjustable illumination driving system

Patent Number: 8111015
Publication Date: 2012-02-07
Inventor: Chang, Shih-Hsien

An illumination driving system includes a control unit and at least one base. The control unit includes a first converter and a brightness-adjustable circuit. An input AC voltage is converted into a regulated DC voltage by the first converter. The brightness-adjustable circuit is connected to the first converter. The base is separated from the control unit for supporting the at least one light-emitting device. The base includes a second converter. The second converter is connected with the ...

Drive circuit for driving a load with constant current

Patent Number: 8111014
Publication Date: 2012-02-07
Inventors: Van Erp, Josephus Adrianus Maria; Verschooten, Eric P. M.

A drive circuit (1) for driving a load (3) comprises: a switched mode power supply (10) for supplying at the output (2a, 2b) a switched output current (IL); a controller (20) for controlling the power supply; a current sensor (15) for generating a current sense signal (Vi 5) representing the output current (IL); a voltage sensor (30) for generating a voltage sense signal (Sy) representing the output voltage (Vp; ...

Method and firmware for controlling voltage and current in a fluorescent lamp array

Patent Number: 8111013
Publication Date: 2012-02-07
Inventor: Sanchez, Jorge

A method and firmware for controlling voltage and current in an electrical load includes steps of calculating a numerically quantized duty cycle of a pulse-width modulated, digital switch control signal by firmware in an inverter voltage microcontroller as a function of an inverter voltage and controlling the inverter voltage by adjusting the duty cycle of the digital switch control signal to generate a load current in the electrical ...

Method and firmware for controlling an inverter voltage by drive signal frequency

Patent Number: 8111012
Publication Date: 2012-02-07
Inventor: Sanchez, Jorge

A method and firmware for controlling an inverter voltage includes steps of receiving as input a digitized feedback signal representative of an inverter voltage that varies with frequency according to a transfer function, calculating a frequency of a digital switch control signal in firmware in an inverter voltage microcontroller by the transfer function from the digitized feedback signal to adjust the inverter voltage to a set point value, and generating the digital switch control signal ...

LED luminaire with improved life and operation management

Patent Number: 8111011
Publication Date: 2012-02-07
Inventors: Wu, Chen-Ho; Tu, Chin-Wang; Wang, Shih Chang

A method and apparatus for adjusting the drive signal of an LED luminaire is provided and includes an LED light source assembly, an ambient sensor circuit, a comparator circuit, and a driver circuit. The ambient sensor circuit provides an ambient signal to the LED light source assembly, which is a function of the ambient (such as temperature, humidity or air visibility) proximate to the LED light source assembly. The comparator circuit provides a bidirectional ambient adjustment signal to ...

Dimmable operating device having internal dimming characteristic

Patent Number: 8111010
Publication Date: 2012-02-07
Inventors: Zimmermann, Michael; Hartmann, Martin; John, Andreas; Richter, Falk; Duenser, Mathias

The invention relates to an operating device (BG) for lamps (LM), comprising an interface (IFi), by means of which the device (BG) may be provided with external dimming values. The device (BG) converts said provided external dimming values into internal dimming values on the basis of which the control of the connected lamps (LM) is achieved, the internal dimming values being of higher resolution than the external dimming values. According to the invention, the operating device (BG) is ...

Light adjustment circuit for alternating-current light emitting diodes (AC-LED"s)

Patent Number: 8111009
Publication Date: 2012-02-07
Inventors: Huang, Yao-Te; Tsai, Wen-Tien; Chong, Hwei-Shung; Chen, Chung-Yue; Yang, Bing-Chwen; Chen, Yie-Tone; Lee, Li-Ling

A light adjustment circuit for alternating-current light emitting diodes (AC-LED's) connected to an AC power supply and a plurality of AC-LED's comprises: a light adjustment unit, being capable of modulating AC power from the AC power supply while providing the plurality of AC-LED's with the modulated AC power; and a pulse width modulation (PWM) control circuit, being capable of modulating an external voltage signal in correspondence to variation in input AC power to enable each of the ...

Multiple-input electronic ballast with processor

Patent Number: 8111008
Publication Date: 2012-02-07
Inventors: Skvoretz, Matthew; Spira, Joel S.; Veskovic, Dragon; Anselmo, Robert A.; Taipale, Mark A.

A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that ...

Electronic device capable of controlling LED brightness and method thereof

Patent Number: 8111007
Publication Date: 2012-02-07
Inventors: Hu, Sha-Sha; Chung, Shin-Hong; Hsieh, Kuan-Hong; Ke, Jui-Lin; Li, Zhi-Guo

An electronic device capable of controlling light-emitting diode (LED) bright is provided. The electronic device includes a signal producing unit for producing an operation signal; a Micro Control Unit (MCU) configured for outputting a normal brightness control signal according to the operation signal, and outputting a ultra brightness control signal according to the operation signal when an actual idle time of the electronic device reaches or exceeds a predetermined idle time; a pulse ...

Light emitting diode driving apparatus

Patent Number: 8111006
Publication Date: 2012-02-07
Inventors: Sawada, Hiroshi; Komiya, Kunihiro

A light emitting diode driving apparatus 10 of the present invention includes: a driving voltage generating section 11 for generating a driving voltage Vout of an LED; a driving current control section 12 for PWM controlling driving currents iW1 to iW3 that flow through the LED; and a monitor voltage generating section 13 that monitors the driving voltage Vout, and that generates a monitor voltage Vm during an OFF period of the driving current by ...

Voltage supply module and backlight assembly having the same

Patent Number: 8111005
Publication Date: 2012-02-07
Inventors: Choi, Min-Soo; Um, Jae-Eun

In a voltage supply module and a backlight assembly having the same, a converter is disposed on a first face of a board and converts basic voltage into driving voltage. A capacitor includes at least one first electrode connected to an output line of the converter and at least one second electrode disposed to be spaced apart from the first electrode along a direction substantially parallel with the first face. A plurality of the second electrodes are disposed on the board between the first ...

Color navigation system

Patent Number: 8111004
Publication Date: 2012-02-07
Inventor: Baaijens, Johannes Petrus Wilhelmus

A system and method for color navigation through a CIELAB color space with coordinates hue (H), lightness (L), chroma (C), with intervals ΔH, ΔL, ΔC such that the perceptual color difference AE1Nv, defined according to the formula: AZW =^{AL)2+{fc(H)−ACf+[AH)2, is constant for steps in direction C and L and for steps in direction H along boundary of color space. fc(H) is a proportionality factor between 0 and 1 depending on hue. For hue values between red (H1) and green ...

Backlight assembly, display apparatus having the same and control method thereof

Patent Number: 8111003
Publication Date: 2012-02-07
Inventor: Park, Seong-ho

A backlight assembly with a light source unit, includes: a drive signal generator which generates a switching drive signal on the basis of a predetermined drive frequency and a feedback power fed back from the light source unit; a switching unit which outputs a power to the light source unit in response to the switching drive signal; and a controller which decreases the drive frequency if the feedback power is higher than a predetermined critical ...

Device and method for operating a high-pressure discharge lamp

Patent Number: 8111002
Publication Date: 2012-02-07
Inventor: Bönigk, Michael

A device for operating a high-pressure discharge lamp (930) with a bipolar supply current and a regulated power input. The device includes a regulator (961) with an asymmetrical regulating characteristic curve for forming a current or power impulse (K1, K2) close to the zero crossing of the supply ...

LED with integrated constant current driver

Patent Number: 8111001
Publication Date: 2012-02-07
Inventors: Wu, Yifeng; Underwood, Robert

An LED package containing integrated circuitry for matching a power source voltage to the LED operating voltage, LEDs containing such integrated circuitry, systems containing such packages, and methods for matching the source and operating voltages are described. The integrated circuitry typically contains a power converter and a constant current circuit. The LED package may also contain other active or passive components such as pin-outs for integrated or external components, a transformer ...

Method and an operation controller for operation of a mercury vapour discharge

Patent Number: 8111000
Publication Date: 2012-02-07
Inventor: Pekarski, Pavel

The invention describes a method for operation of a mercury vapour discharge lamp (1) in an image rendering system (30), wherein during a total operation time necessary for the presentation of an image content (C), the lamp (1) is deliberately operated in a saturated operating regime at least over a part of the total operation time according to a brightness parameter (BP) of the content (C), in which saturated operating regime mercury is condensed in an arc tube ...

Light source apparatus

Patent Number: 8110999
Publication Date: 2012-02-07
Inventor: Ikeda, Yoshinori

The light source apparatus is provided with a plurality of light source device disposed in the form of a ring and that emit illumination light toward the central axis of the ring by being lit in a sequential pulsed fashion; a light-guide portion having a light entrance surface rotatably disposed on the central axis and on which the illumination light emitted from the light source devices is incident, and a reflecting surface that reflects the incident illumination light in the direction ...

Multi-pulse ignition circuit for a gas discharge lamp

Patent Number: 8110998
Publication Date: 2012-02-07
Inventors: Toonen, Johannis Antonie Amerens; Slegers, Frans; Oosterbaan, Thijs; Hooijer, Christofher Daniel Charles

An ignition circuit for igniting a gas discharge lamp generates a high voltage gas breakdown pulse by building up a current through a primary winding of a transformer. After a predetermined period and thus when a predetermined current flows through the primary winding, a capacitance is switched in series with said primary winding, thereby generating said high voltage gas breakdown pulse in a secondary winding of said transformer. After generating the high voltage pulse, the capacitance is ...

LED drive circuit

Patent Number: 8110997
Publication Date: 2012-02-07
Inventor: Muramatsu, Yasunori

A LED drive circuit equipped with oscillator 18, up/down counter 20, and DAC 22 in order to drive multiple LEDs 10(1)-10(m) in a block. Up/down counter 20 carries out count-up/down operations in sync with clock CLK sent from oscillator 18 during the ramping up/down of pulse-lighting of the LEDs. DAC 22 converts counter count value DN into analog voltage signal V_DACand supplies it to the gate terminal of NMOS ...

Modular wireless lighting control system using a common ballast control interface

Patent Number: 8110996
Publication Date: 2012-02-07
Inventor: Budike, Jr., Lothar E. S.

Disclosed is a modular lighting system that incorporates wireless technology and a standard interface. The lighting system may be installed in new buildings or retrofitted into existing buildings in such a way that provides many lighting configurations and programmability options while minimizing the amount of new wiring. The system includes a transceiver that controls one or more lamps using a dimming ballast or a relay and a low cost ballast. The dimming ballast, and the relay (if used) ...

Illumination system comprising a plurality of light sources

Patent Number: 8110995
Publication Date: 2012-02-07
Inventor: Deurenberg, Peter Hubertus Franciscus

An illumination system (1) comprises a plurality of light sources (11, 12, 13), each provided with a driver (21, 22, 23); a controller (30) for generating control signals (S_c1, S_c2>S_c3) for controlling the respective drivers; temperature feed forward means (60, 61, 62, 63, 81) for establishing a temperature feed forward (TFF) correction mechanism; flux feedback means (71, 82, 83, 84) for establishing a flux feedback ...

Multi-zone closed loop daylight harvesting having at least one light sensor

Patent Number: 8110994
Publication Date: 2012-02-07
Inventors: Leinen, Richard A.; Hick, Robert L.

A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor connected to a detection circuit for detecting the amount of ambient light within a given zone and converting the light signal to an digital one. A control device couples to receive a predetermined rate of change for each respective zone from a storage unit along with the converted digital signal. ...

Methods for inductively-coupled RF power source

Patent Number: 8110993
Publication Date: 2012-02-07
Inventors: Fletcher, Roger; Mattaboni, Paul J.; Mellor, Robert

A method for tracking a variable resonance condition in a plasma coil during creation of plasma from a gas flowing in a plasma torch adjacent to the plasma coil comprises: providing a radio-frequency (RF) power source comprising a power amplifier that generates a radio-frequency power signal with an adjustable operating frequency; providing a high-voltage ignition charge from said RF power source to the gas in plasma torch so as to create an electrical discharge through said gas so as to ...

Controlled plasma power supply

Patent Number: 8110992
Publication Date: 2012-02-07
Inventor: Nitschke, Moritz

A plasma power supply system for producing electrical power in the range between 1 kW and 100 kW for a plasma processing system and supplying the power to a plasma chamber through a power line connection, the plasma power supply system includes a power converter, a monitoring section, an arc diverter, a control section with an arc diverter control section and an arc detection section, and an input device wherein the input device is connected to the arc ...

Phase and frequency control of a radio frequency generator from an external source

Patent Number: 8110991
Publication Date: 2012-02-07
Inventor: Coumou, David J.

Controlling a phase and/or a frequency of a RF generator. The RF generator includes a power source, a sensor, and a sensor signal processing unit. The sensor signal processing unit is coupled to the power source and to the sensor. The sensor signal processing unit controls the phase and/or the frequency of a RF ...

Atmospheric pressure plasma apparatus

Patent Number: 8110990
Publication Date: 2012-02-07
Inventors: Park, Chun-Seong; Park, Yong-Seok; Choi, Bum Ho; Lee, Jong Ho; Bae, Jung Chan; Kim, Woo Sam; Lee, Gil Sik; Overzet, Lawrence John; Lee, Byeong Jun

Disclosed is an atmospheric pressure plasma apparatus for enhancing and or controlling the dissociation of a secondary gas by converting a source gas into a plasma state at atmospheric pressure and controlling the interaction between that plasma and the secondary gas using porous metal, and ceramic tubes to create a path having controllable isolation from the region where plasma is ...

Lighting controller of lighting device for vehicle

Patent Number: 8110989
Publication Date: 2012-02-07
Inventors: Ito, Masayasu; Kitagawa, Takayoshi; Nakamura, Noriyuki

A lighting controller of a lighting device for a vehicle includes M (M is an integer of one or more) switching regulators for supplying driving currents to first to Nth (N is an integer of one or more) semiconductor light sources; first to Nth current driving portions; a temperature detector; and a control circuit. The first to Nth current driving portions include first to Nth current detecting portions connected to the semiconductor light sources and serving to detect the driving currents ...

Plasma lamp with dielectric waveguide

Patent Number: 8110988
Publication Date: 2012-02-07
Inventors: Chang, Yian; Espiau, Frederick M.; Joshi, Chandrashekhar J.

A dielectric waveguide integrated plasma lamp is disclosed for powering a small and bright bulb with a diameter of a few millimeters. The lamp is contained within a high dielectric constant material which guides the microwaves to the bulb, provides heat isolation to the drive circuit, contains the microwaves, provides structural stability and ease of manufacturing and allows efficient energy coupling to the bulb when used as a dielectric resonant ...

Lighting system

Patent Number: 8106608
Publication Date: 2012-01-31
Inventor: Ku, Chin-Long

A lighting system includes a power source, a switch, a time detecting circuit, a controlling circuit, a driving circuit and an LED lamp electrically connected together. The time detecting circuit could detect switching times and periods of the switch at an “on” and “off” positions, thereby producing corresponding signals to the driving circuit to lighten the LED lamp with different brightness ...

Network master for wireless fluorescent lamp lighting control networks

Patent Number: 8106607
Publication Date: 2012-01-31
Inventor: Pope, Steven M.

A system involves a plurality of RF-enabled occupancy detectors. Each occupancy detector communicates with and controls an associated plurality of RF-enabled fluorescent lamp starter units. A network master has an RF transceiver used to communicate with the occupancy detectors using a first protocol, thereby retrieving status information from the starter units. The network master also has a second RF transceiver for communicating directly with a cellular telephone using a second protocol. A ...

Voltage multiple dimming control apparatus

Patent Number: 8106606
Publication Date: 2012-01-31
Inventors: Chang, Yi-Tai; Liu, Wen-Kuen Vincent

The present invention discloses a control apparatus, which not only accepts multiple dimming control signals, but also combines the signals in analog manner. By means of this, an inevitable analog to digital converter in a conventional voltage multiple dimming control apparatus can be saved without hurting the performance of generation of pulse width modulation signals. Compared with the conventional arts, the present invention further exhibits reduction in view of chip size and power ...

Backlight control circuit

Patent Number: 8106605
Publication Date: 2012-01-31
Inventors: Xiao, Hua; Zhou, Tong

An exemplary backlight control circuit includes a pulse width modulation integrated circuit (PWM IC) having a power input terminal, a power source capable of outputting an operation voltage, and a switching circuit connected between the power source and the PWM IC to control if the operation voltage is provided to the power input ...

LED driver with dynamic power management

Patent Number: 8106604
Publication Date: 2012-01-31
Inventors: Cornish, Jack W.; Horng, Brian B.; Kameya, Andrew M.; Lee, Victor K.; Kwok, Kenneth C.; Zhao, Bin

A light emitting diode (LED) system implements a LED driver to drive a set of one or more LED strings. The LED driver includes a voltage source to provide an adjustable output voltage to a head end of each LED string of the set for a first duration and a second duration following the first duration. The LED driver further includes a feedback controller to control the voltage source to adjust the output voltage for the second duration based on a digital code value generated from a minimum ...

Backlight driving circuit

Patent Number: 8106603
Publication Date: 2012-01-31
Inventors: Huang, Yu-Liang; Qi, Xiao-Jing; Fu, Zhi-Feng

A backlight driving circuit includes a light driving unit, which includes a constant current unit, and a light source operated by the constant current unit. The light driving unit further includes a feedback control unit and a detection circuit. The detection circuit detects the light source and outputs at least a voltage feedback signal to the feedback control unit. The feedback control unit obtains a prestored power parameter corresponding to the voltage feedback signal and outputs an ...

Backlight assembly, display apparatus having the backlight assembly and method of preventing a current controller of the backlight assembly from being shut down

Patent Number: 8106602
Publication Date: 2012-01-31
Inventors: Kang, Eui-Jeong; Kim, Gi-Cherl; Ye, Byoung-Dae

A backlight assembly includes a light-emitting apparatus, a multi-channel current controller and a heat distributor. The light-emitting apparatus includes a plurality of light-emitting diode (“LED”) strings. The multi-channel current controller includes a plurality of current control circuits, each of which includes an input channel electrically connected an LED string of the plurality of LED strings and which controls a magnitude of a driving current flowing through the LED string. The ...

LED illuminant driving circuit and automatic brightness compensation method thereof

Patent Number: 8106601
Publication Date: 2012-01-31
Inventors: Yen, Chih-Jen; Hsieh, Chih-Yuan; Liu, Yi-Te

An LED illuminant driving circuit and an automatic brightness compensation method thereof are provided herein. The automatic brightness compensation method includes: providing a target value; detecting an operation period of a pulse of an output of the LED illuminant driving circuit, the pulse is adapted to an LED illuminant for making the light emitting; deciding a peak value according to the target value and the operation period; and setting a peak level of the pulse according to the peak ...

Photopolymerization apparatus

Patent Number: 8106600
Publication Date: 2012-01-31
Inventor: Fregoso, Gilbert

A light-weight, portable photocuring device possesses a single multi-wavelength light emitting diode (LED). The single LED backed with a heat sink is driven by a driving circuit and controlled by a timing circuit. A temperature monitor can be included in a closed loop to feed back and control the driver. A multi-plexing device regulates the current to individual ports on the LED effecting the dies allowing the overall wavelength and intensity of the emitted light by the apparatus to be ...

Switched light element array and method of operation

Patent Number: 8106599
Publication Date: 2012-01-31
Inventors: Schulz, Volkmar; Radermacher, Harald Josef Günther

A switched light element array includes first, second and third light emitting elements, and first and second switches. The first light emitting element includes first and second terminals, and the second light emitting element includes a first terminal, and a second terminal coupled to the second terminal of the first light emitting element. The third light emitting element includes a first terminal coupled to the first terminal of the first light emitting element and a second terminal. ...

Method and apparatus for assuring compliance with high efficiency lighting standards

Patent Number: 8106598
Publication Date: 2012-01-31
Inventor: Yates, James P.

Method and apparatus for assuring use of a fluorescent or similar high efficiency lamp in a screw base socket, the invention provides a circuit containing a screw base socket and an associated thermal sensing unit capable of interrupting power to the circuit on sensing of heat such as is generated by an incandescent or similar low efficiency lamp when mounted in the screw base socket. Practice of the method permits use of only fluorescent or similar lamping such as is incapable of ...

High efficiency boost LED driver with output

Patent Number: 8106597
Publication Date: 2012-01-31
Inventors: Tirumala, Rohit; Mednik, Alexander

A current driver for powering a string of LEDs has a boost converter coupled to an input voltage source. A voltage multiplier circuit is coupled to the boost converter and to the string of LEDs. A latch is provided having an output coupled to the boost converter. A current sense element is coupled to the boost converter. A current comparator is provided having an output coupled to a first input of the latch, a first input coupled to the current sense element, and a second input coupled to a ...