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| Number | Title | Issue Date |
| 8188684 | Portable device, recording medium storing light emission control program and light emission control method thereof A portable device includes a light emission unit to emit light on a case, a clocking unit to clock time, an information acquisition unit to acquire information indicating a position and/or a state necessary for illuminating the light emission unit, and a control uni... | 05/29/2012 |
| 8183797 | 90-260Vac dimmable MR16 LED lamp A line voltage LED Lamp produces variable illumination in response to industry standard lighting dimmers, through the use of an input voltage monitoring circuit which variably controls the current output of an integral driver in response to sensed changes in the inp... | 05/22/2012 |
| 8174211 | Method and system for operating a discharge lamp such as to detect defective operation of the lamp A method for detecting defective operation of a discharge lamp includes determining the lamp impedance and establishing that the lamp is operating in an incandescent mode if it is found that the lamp has a positive impedance. ... | 05/08/2012 |
| 8169161 | Electronic circuits for driving series connected light emitting diode strings Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes. ... | 05/01/2012 |
| 8169162 | Abnormal discharge suppressing device for vacuum apparatus The present invention is directed to an apparatus for suppressing abnormal electrical discharge used for vacuum equipment which supplies power from a high-frequency power source to a plasma reaction chamber and executes a film formation process, provided with a powe... | 05/01/2012 |
| 8159151 | Control circuit for inverter A reference voltage source generates a reference voltage for adjusting an electric current for a dimming operation. The first current source generates a first current. A first current mirror circuit includes multiple output terminals, duplicates the first current, a... | 04/17/2012 |
| 8154222 | Pulse-width modulation current control with reduced transient time One embodiment of the present invention includes a current regulator circuit. The circuit includes at least one switch configured to periodically couple and decouple a respective at least one voltage rail to an inductor to maintain a current through the inductor. Th... | 04/10/2012 |
| 8148920 | Method of controlling a ballast for a high intensity discharge lamp and related system A method of controlling a ballast for a high intensity discharge (HID) lamp and related system. The method includes setting initial operating parameters of the ballast to turn on the HID lamp, generating starting transient electric characteristic values of the HID l... | 04/03/2012 |
| 8134307 | Method, system and remote control for controlling the settings of each of a multitude of spotlights Method for controlling the settings of each of a multitude of spotlights, such as light intensity, color and light beam direction, wherein a remote control is used for sending control signals to a control system comprising a multitude of control units for changing t... | 03/13/2012 |
| 8134308 | Method for driving a PTC electrical load element A method is intended to make it possible to drive a PTC electrical load element with a switching unit with the highest possible operational reliability. For this purpose, the electric current is switched off if a predetermined current threshold value is exceeded, th... | 03/13/2012 |
| 8129927 | Driving device and driving method of electric discharge lamp, light source device, and image display apparatus A driving device of an electric discharge lamp includes: a discharge lamp lighting unit which supplies power to the electric discharge lamp while alternately switching polarity of voltage applied between two electrodes of the electric discharge lamp to lighting the ... | 03/06/2012 |
| 8120285 | Driving method for discharge lamp, driving device for discharge lamp, light source device, and image display apparatus In at least one embodiment of the disclosure, a driving device for a discharge lamp includes an alternating current supply section and a frequency switching section. The alternating current supply section supplies two electrodes of the discharge lamp with an alterna... | 02/21/2012 |
| 8115422 | LED drive circuit Provided is an LED drive circuit capable of using a switching regulator IC having low breakdown voltage even when a power supply voltage is high. The LED drive circuit includes a voltage clamp circuit for clamping the power supply voltage to an operating voltage of ... | 02/14/2012 |
| 8111018 | Application infrastructure for constructing illumination equipments with networking capability 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,... | 02/07/2012 |
| 8111019 | Sensing type control circuit for electronic apparatus 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 co... | 02/07/2012 |
| 8093839 | Method and apparatus for driving CCFL at low burst duty cycle rates A cold cathode fluorescent lamp controller constituted of a pulse generator exhibiting a cycle period; a burst dimming control operative to set a burst dimming duty cycle for the pulse generator; a comparator arranged to receive a signal indicative of the value of c... | 01/10/2012 |
| 8093838 | Driving circuit and method for preventing lamp from blasting In a driving circuit and method for preventing a lamp from blasting, a driving circuit includes a control circuit module, a voltage conversion circuit module, a driving module and a feedback circuit. The control circuit module outputs a first control signal accordin... | 01/10/2012 |
| 8072164 | Unified 0-10V and DALI dimming interface circuit Systems and methods are disclosed that facilitate switching a lamp ballast between DALI and analog control states as a function of control state information stored prior to the ballast being powered of and control information received by an interface circuit for the... | 12/06/2011 |
| 8067905 | Power line preconditioner for improved LED intensity control A switched preconditioner circuit is provided at the power input end of a light source to effectively drop the voltage of the light source to zero volts whenever the light source is required to be in an OFF state thereby eliminating the problem of unwanted current t... | 11/29/2011 |
| 8022642 | Discharge lamp lighting device A discharge lamp lighting device is provided to comprise tube current detecting circuits 51 to 5n for outputting detection signals VI1 to VIn of tube currents I1 to In flowing through ea... | 09/20/2011 |
| 8008873 | Restart circuit for multiple lamp electronic ballast A restart circuit for causing an electronic ballast to perform a restart in response to reconnecting any lamp of a multiple lamp configuration of the electronic ballast to the electronic ballast is disclosed. The electronic ballast includes a filament health check c... | 08/30/2011 |
| 8004215 | Lamp abnormality detecting device and inverter, backlight device, and display device which are equipped with the same One embodiment of the present invention relates to a lamp abnormality detecting device that detects an abnormality in a lamp. A maximum/minimum extraction circuit outputs, as a maximum current, a current having a maximum current value among currents supplied thereto... | 08/23/2011 |
| 7990077 | LED control circuit A LED control circuit includes an LED array circuit and a control circuit. The LED array circuit has a plurality of parallel branches, each of which has a constant-current regulator, an LED and an FET connected together in series, wherein the constant-current regula... | 08/02/2011 |
| 7986111 | Electronic ballast control circuit A control circuit for use in a ballast configured for powering a first lamp set and a second lamp set. The second lamp set is operated via a controller and a second lamp driver circuit. The controller enables the second lamp driver circuit as a function of a monitor... | 07/26/2011 |
| 7977893 | PFC and ballast control IC The IRS21681D is a fully integrated, fully protected 600V ballast control IC designed to drive all types of fluorescent lamps. The IRS21681D is based on the popular IR2166 control IC with additional improvements to increase ballast performance. PFC circuitry operate... | 07/12/2011 |
| 7928670 | LED driver with multiple feedback loops An LED driver includes at least two interlocked closed feedback loops. One feedback loop controls the duty cycle of the on/off times of a switch connected in series to the LED string, and the other feedback loop controls the duty cycle of the on/off times of a power... | 04/19/2011 |
| 7928669 | Color control of a discharge lamp during dimming A ballast circuit is suitable for driving a high intensity discharge lamp in at least two power modes including a nominal power mode for driving the high intensity discharge lamp at a nominal power and a reduced power dimming mode for driving the lamp at less than t... | 04/19/2011 |
| 7923942 | Constant current source mirror tank dimmable ballast for high impedance lamps A constant current source mirror tank dimmable ballast operates multiple high impedance lamps in a stable and balanced manner. The dimmable ballast has an inverter connected to two third-order resonant circuits. These third-order resonant circuits dominate the trans... | 04/12/2011 |
| 7911159 | Robust driver for high intensity discharge lamp A circuit arrangement and a method for operating a high intensity discharge lamp driver, which assure long-lasting stable operation of a high intensity discharge lamp regardless of the type or the age of the lamp. This is achieved by the determination of a correctio... | 03/22/2011 |
| 7893631 | White light luminaire with adjustable correlated colour temperature The present invention provides a luminaire system and method for creating white light having a desired color temperature. The system comprises one or more white light light-emitting elements for generating white light having a particular color temperature. The syste... | 02/22/2011 |
| 7888890 | Method for controlling an electrical light source by pulse width modulation A method for controlling electrical light sources, in particular, light-emitting diodes (LEDs) by pulse width modulation of a supply voltage is disclosed, whereby the supply voltage or a parameter dependent thereon, for example the current or the electrical power, i... | 02/15/2011 |
| 7863834 | Ultraviolet lamp system and method for controlling emitted UV light An ultraviolet lamp assembly and corresponding methods is operable to generate ultraviolet light for irradiating a substrate. The lamp assembly includes a magnetron, an electrodeless lamp for emitting ultraviolet light when excited by microwave radiation generated f... | 01/04/2011 |
| 7859198 | Backlight module having detecting circuit and direct current voltage compensation circuit An exemplary backlight module includes lamps (21), a power supply circuit (20), a detecting circuit (22), and a direct current voltage compensation circuit (23). The power supply circuit is configured for supplying a driving voltage to th... | 12/28/2010 |
| 7852020 | Lamp overload detection/modulation circuit A lamp overload detection/modulation circuit including a microcontroller unit for detecting rectangular wave signal reflective of the power used by the lamp load and pulse width signal of AC power. The positive bandwidths of the two signals are compared with a prede... | 12/14/2010 |
| 7847492 | Discharge lamp lighting apparatus and projector In a discharge lamp lighting apparatus, increase modulation on lamp current with a pulse is carried out according to a modulation signal. At a start-up of the discharge lamp or immediately thereafter, the increase modulation is restrained, and in a lighting steady s... | 12/07/2010 |
| 7843151 | Backlight control circuit with micro controller feeding operating state of load circuit back to pulse width modulation integrated circuit An exemplary backlight control circuit (200) includes at least one load circuit (210), a pulse width modulation integrated circuit (250), and a micro controller (260). The micro controller includes an output terminal and a plurality of an... | 11/30/2010 |
| 7834562 | Discharge lamp lighting device To provide a discharge lamp lighting device in which the initial state of discharge in a wiring of a circuit on the secondary side of a transformer in the discharge lamp lighting device is accurately detected and the operation thereof stops and which can be applied ... | 11/16/2010 |
| 7825612 | Light emitting diode array driving apparatus There is provided a LED array driving apparatus for driving a light emitting array having a plurality of LEDs connected to one another, including: a DC-DC converting part; a current/voltage detecting part detecting a magnitude of a first current flowing through a sw... | 11/02/2010 |
| 7800318 | Power supply device for a LCD backlight panel The present invention provides an improved power supply circuit for a backlight control of the LCD panel, capable of initiating a plurality of CCFL. The electrical lighting device comprises an switching electronic ballast circuit, a CCFL abnormal detective circuit, ... | 09/21/2010 |
| 7795821 | Back light unit having a plurality of luminous elements and control method thereof A back light unit (BLU) having a plurality of luminous elements, and a control method thereof is provided. The BLU includes a temperature detector to detect a temperature of the BLU, brightness detectors to detect a brightness of the plurality of luminous elements, ... | 09/14/2010 |
