Match Document Document Title
US20110140619 DIFFERENTIAL DRIVING CIRCUIT FOR POWERING A LIGHT SOURCE  
A differential driving circuit for powering a light source is disclosed. The differential driving circuit includes a first set of switches and a second set of switches. A first current from a...
US20100072917 System for Control of Ballast Illumination in Step Dimming and Continuous Dimming Modes  
A system for controlling ballast illumination includes providing power to a light ballast power stage, driving a ballast lamp to a pre-determined ballast lamp illumination in response to the power...
US20070241692 Driving arrangement for a passive matrix self-emitting display element  
This invention relates to a driving arrangement for voltage driving of a passive matrix self-emitting display element (1), the driving arrangement comprising: voltage application circuitry (3) for...
US20080258639 PHASE SHIFT CIRCUIT AND BACKLIGHT UNIT HAVING THE SAME  
Disclosed is a phase shift circuit. The phase shift circuit comprises a frequency multiplier outputting a square wave signal by frequency-multiplying a reference signal, a frequency synchronizer...
US20070029947 Inverter driving circuit  
An inverter driving circuit includes a micro-controller and a PWM control unit to replace the double PWM control units adopted in conventional techniques. A voltage feedback signal may be captured...
US20110140633 Collimated Illumination System Using an Extended Apparent Source Size to Provide a High Quality and Efficient Fixture  
A downlighting illumination system (100) is provided having a high light output ratio with an extended apparent source size producing a near uniform illuminance, correlated colour temperature and...
US20090174345 POWER SUPPLY CIRCUIT  
A power supply circuit is proposed for supplying current to a pair of white LEDs connected in series. The circuit comprises a DC-DC power converter, with a charge pump coupled to the output of the...
US20110241563 ORGANIC LIGHT EMITTING DIODE DISPLAY  
An OLED display is disclosed. The OLED display includes two substrates with organic light emitting elements therebetween. The organic light emitting elements include a second electrode in common...
US20090243508 BALLAST CIRCUIT  
A ballast circuit is provided. The ballast circuit comprises a first lamp set, a second lamp set, a detection circuit, and a latch circuit. The first lamp set comprises a first inductor and a...
US20080054823 Automatic light dimmer for electronic and magnetic ballasts (fluorescent or HID)  
An apparatus is disclosed for automatic light dimming of electronic and magnetic ballasts used for fluorescent or high intensity discharge lamps. A variable capacitant's limiting current is added...
US20100072909 System for Field-Programmed Determination of Illumination Set Points in Ballasts  
A system for programming control of ballast illumination includes receiving a power stage input current through a first ballast input, receiving a level switch control signal at a second ballast...
US20090115342 Lighting System for Illumination Using Cold Cathode Fluorescent Lamps  
A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device...
US20060038512 Electronic equipment equipped with switching power circuit and power supply control method  
To provide electronic equipment equipped with a switching power circuit which oscillates intermittently when an apparatus is OFF, where the apparatus is prevented from failing to start up upon...
US20070024213 Pulsed current averaging controller with amplitude modulation and time division multiplexing for arrays of independent pluralities of light emitting diodes  
Exemplary embodiments provide a system, method and appartus for regulating current in loads, such as in an array of independent pluralities of light emitting diodes (“LEDs”). An exemplary system...
US20080061701 LIQUID CRYSTAL DISPLAY HAVING DRIVING CIRCUIT FOR LIGHT EMITTING DEVICE  
A backlight module that uniformly maintains the brightness of a light emitting device, in which the number of transformers is reduced, and that is applicable for use with large cold cathode ray...
US20130207569 METHOD OF CONTROLLING AN ELECTROLUMINESCENT DISPLAY AND RELATED CONTROL CIRCUIT  
A control circuit is for generating upper and lower voltages that define a range of a data voltage for controlling a driving transistor of an electroluminescent component coupled to a supply line...
US20070126372 Power supply devices  
Disclosed is a power supply device driving lamp(s). An electrical isolation driver generates at least one switch signal according to at least one control signal. The control signal and the switch...
US20140070725 PIXEL CIRCUIT AND DRIVING METHOD THEREOF  
It discloses a pixel circuit and a driving method thereof. The pixel circuit includes a light-emitting device (OLED), a driving transistor (DTFT), a storage capacitor (Cst), a first switching...
US20080276154 LIGHTING CONTROL PROTOCOL  
A digital lighting control network protocol with forward and backward frames, each of the frames including an error check code. A no-acknowledgment (NAK) signal is sent from a receiving node to a...
US20090200955 COMBINED BALLAST FOR FLUORESCENT LAMP AND LIGHT EMITTING DIODE AND METHOD OF DRIVING SAME  
A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that...
US20090256786 LIGHT SOURCE DRIVING APPARATUS, LIGHT SOURCE DRIVING METHOD, AND DISPLAY APPARATUS  
A light source driving apparatus includes: a switching driver which performs switched-mode power conversion and outputs a first current toward a light source, to control quantity of light emitted...
US20130002616 THIN FILM TRANSISTOR, AND PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME  
A thin film transistor, a pixel, and an organic light emitting diode (OLED) display including the same are disclosed. The thin film transistor includes a connection to the channel region separate...
US20130057160 LED Device with Power Removal Detection and Method for Using the Same  
An LED lamp is placed in service on an automotive vehicle to enhance nighttime visual ability or anywhere where increased lighting is needed. The LED lamp utilizes a multi-stage power and control...
US20080203934 Method and Circuit for Enabling Dimming Using Triac Dimmer  
To enable dimming of an energy-saving lamp, in particular a gas discharge lamp, using a standard TRIAC dimmer circuit, a large additional current is drawn when the TRIAC is in a non-conductive...
US20100033107 UNIVERSAL ELECTRONIC BALLAST FOR OPERATING HG-FREE AND HG-CONTAINING DISCHARGE LAMPS  
The invention discloses a method and/or electronic ballast, which can be universally used for a plurality of types of discharge lamps and which performs an orientation mode for detecting the lamp...
US20100072914 DIMMING CIRCUIT FOR DISCHARGING LAMP CAPABLE OF TURNING OFF UNDER A LOW POWER CONDITION  
A dimming circuit includes a resonant unit, a rectification unit, a half-bridge output unit, a first switch device and a second switch device, and a selection unit. The rectification unit is...
US20110248647 LIGHTING DEVICE AND LIGHT FIXTURE USING LIGHTING DEVICE  
A lighting device reliably detects a status (i.e., existence or absence) of a load connection, and enables or disables power output based on the detected load connection status. The device...
US20090174346 Lighting Apparatus for a Gaming Machine Cabinet  
A lighting apparatus for a gaming machine cabinet comprising: a spot light source which emits light relative to a central emission axis; and a translucent diffuser spaced from the spot light...
US20100090614 CURRENT-REGULATED LIGHT EMITTING DEVICE FOR VEHICLE USE  
A current-regulated light emitting device for vehicle use includes a light emitting unit and a current limiting unit. The current limiting unit includes first and second switches and first and...
US20100237784 PORTABLE LIGHTING DEVICE AND METHOD THEREOF  
A portable lighting device includes a power source, a controller, and a load. The controller comprises a power input terminal which is electrically connected to the power source via a switch. The...
US20100213866 BALLAST AND BALLAST CONTROL METHOD AND APPARATUS, FOR EXAMPLE ANTI-ARCING CONTROL FOR ELECTRONIC BALLAST  
A technique for providing control for an electronic ballast by responding to the current in the common bus (DC power rail) between a boost circuit such as a power factor circuit (PFC) and an...
US20100270944 DEVICE AND METHOD FOR CONTROLLING ELECTRIC CONSUMERS  
An apparatus for controlling at least one electrical load may include at least one pushbutton; a communications interface for communicating with the loads, the loads being switched on and off by...
US20140021883 POWER LIGHT EMITTING DIODE AND METHOD WITH CURRENT DENSITY OPERATION  
A light emitting diode device emitting at a wavelength of 390-415 nm has a bulk gallium and nitrogen containing substrate with an active region. The device has a current density of greater than...
US20110279054 Power Light Emitting Diode and Method with Current Density Operation  
A light emitting diode device emitting at a wavelength of 390-415 nm has a bulk gallium and nitrogen containing substrate with an active region. The device has a current density of greater than...
US20150173134 Dimming Driver With Stealer Switch  
An apparatus for supplying power includes a power input, a load output and a switch connected in series to the power input, a pulse generator comprising a pulse output connected to a control input...
US20140184091 DC Boost Topology Circuit for Backlight Driving  
The present invention provides a DC boost topology circuit for backlight driving, which includes a coupling inductor including a primary coil having an end connected to a DC voltage input terminal...
US20080122382 Lighting System and Method  
A light bar including a light pipe. The light pipe includes at least one substantially flat end, a substantially flat back surface and an emitting surface opposing the substantially flat back...
US20090009104 Step-Up/Down Regulator Circuit and Liquid Crystal Display Device Incorporating It  
A step-up/step-down regulator circuit wherein a switch (N2) has a terminal connected to an end of an inductor (L1), another terminal grounded, and a control terminal connected to an end of a...
US20110116046 LED VARIABLE LIGHT SOURCE  
An LED variable light source of this invention includes a super luminescent LED for generating a continuous light signal having a logarithmically controllable light intensity maintainable over a...
US20080169771 DRIVING CIRCUIT OF DRIVING LIGHT-EMITTING DEVICE  
A light-emitting device driving circuit capable of reliably performing emission control on a light-emitting device of a low emission threshold (about 10 mA or less) and capable of correcting a...
US20090284169 Systems and Methods for Communicating in a Lighting Network  
Systems and methods for communication between devices using a duty cycle of a signal while a device maintains operation responsive to the duty cycle are disclosed. A device receives a signal...
US20070138978 Conversion of solid state source output to virtual source  
A light fixture converts source light from one or more solid state light emitting elements to a virtual light source output. An optical element receives and diffuses light from the solid state...
US20130015781 LED DRIVING DEVICE, ILLUMINATOR, AND LIQUID CRYSTAL DISPLAY DEVICE  
The present invention provides a light emitting diode (LED) driving device, which comprises: a direct current/direct current (DC/DC) controller, for controlling an output segment that is used to...
US20060273741 METHODS AND APPARATUS FOR IMPLEMENTING POWER CYCLE CONTROL OF LIGHTING DEVICES BASED ON NETWORK PROTOCOLS  
A controllable dimmer/relay used in combination with a power cycle control lighting device, wherein the controllable dimmer/relay serves as a network interface for the power cycle control lighting...
US20130119860 Switching Power Supply Apparatus And Luminaire  
A switching power supply apparatus according to an embodiment includes a switching element, an inductor, a drive circuit, a mounting substrate, and an insulating substrate. The switching element...
US20130119890 Dimming drive method, device and dimmable light  
A method for driving light adjustments, a device therefor and a light adjustable lamp thereof are disclosed. The method includes: connecting a light source driving circuit which supplies a light...
US20110204818 Portable Lighting Device and Related Method of Operation  
A portable lighting device and related method of operation is provided which includes a light source, a switch, a brightness control element, a display, a contact for receiving power, and a light...
US20110279482 System and Method for Controlling a Display Backlight  
In one embodiment, a backlight controller for a zoned backlight display includes a processor having a brightness value output. The processor is configured to provide a brightness value for at...
US20120153860 Piezo-Phototronics  
A device includes a substrate having a first surface. A piezoelectric nanowire is disposed on the first surface of the substrate. The piezoelectric nanowire has a first end and an opposite second...
US20100164922 Backlight brightness control for panel display device  
A display device is provided with a display panel; a backlight which illuminates the display panel; and a backlight brightness controller controlling a brightness of the backlight so that the...