Matches 151 - 200 out of 515 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
7307388 Backlight modules and lamp modules in flat panel displays  
A lamp module for use in a backlight module of a flat panel display comprises a first transformer, a second transformer, a plurality of first lamps and a plurality of second lamps. The first...
7301292 Circuit arrangement for operating at least one first and one second lamp which can be inserted in said circuit arrangement  
A circuit arrangement for operating at least one first and one second lamp which can be inserted in the circuit arrangement, each lamp having a first and a second filament, having a drive circuit...
7298096 Circuit and method for sensing open-circuit lamp of a backlight unit and display device with circuit for sensing open-circuit lamp of backlight unit  
A circuit for sensing an open-circuit lamp is provided. The circuit includes a reference voltage output unit, a voltage sensor, and a comparator. The reference voltage output unit provides a...
7295176 LED driver with constant current offset unit  
A light emitting diode (LED) driver to drive an LED, including a current adjusting unit to adjust magnitude of a current flowing on the LED by supplying power from a power supply device to the LED...
7294973 Discharge tube lighting apparatus, light source apparatus, and display apparatus  
A discharge tube lighting apparatus is used to drive a plurality of discharge tubes. The apparatus includes a balance coil having a winding input end and a plurality of winding output ends to which...
7291987 Power supply system for flat panel display devices  
A power supply system for powering backlight lamps in a flat panel display with reduced dimensions and increased power efficiency. The power supply system includes a converter circuit for...
7291992 Load failure protection circuit and discharge lamp driving apparatus  
The present invention provides a load failure protection circuit and a discharge lamp driving apparatus, which can exactly detect a failure even if the failure arises in any of a plurality of...
7288904 Centralized control device for controlling the application of voltage to a load provided with a power factor correction capacitor  
A centralized device for supply voltage control of a load with power factor correction condensers for lighting engineering applications has an array converter for obtaining a portion of power, with...
7288900 Illumination system having at least two light sources, and a method for operating such an illumination system  
An illumination system has at least two light sources of which at least one light source includes an LED, and a driver device designed to operate at least the one LED with a DC signal; a sensor...
7288903 Driving device of light source for display device  
A driving device of a light source for a display device is provided. The light source includes a plurality of lamps connected in parallel to each other and each lamp has a first terminal and a...
7286123 LED driver circuit having temperature compensation  
A LED driver circuit is provided for controlling the brightness of a LED. A control circuit is used for generating a LED current in accordance with a resistor. The control circuit is further...
7285925 Backlight module control circuit of multi-lamp display device  
A backlight module control circuit of a multi-lamp display device includes a control unit, multiple lamp driving circuits and a fault detection unit. The control unit includes multiple signal...
7285921 Electric current balancing device  
An electric current balancing device includes an inverting circuit having a driving unit and one or more transformers coupled together for outputting an electric current to a load device, a...
7282868 Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system  
An inverter circuit for discharge lamps for multi-lamp lighting in which the value of a negative resistance characteristic of a fluorescent lamp is controlled, and an excessively set reactance is...
7276858 Decorative lighting string with stacked rectification  
An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing...
7276863 LED array driving apparatus and backlight driving apparatus using the same  
The present invention relates to an LED array driving apparatus and a backlight driving apparatus using the same which enables regulation of analogue and PWM dimming for each channel and LED of a...
7275381 Light device for refrigerator or freezer  
A light device for refrigerators or freezers includes a sensor, a first manual switch, a rotatable switch, an interior loop and an alternative current power supply. The interior loop includes an...
7276861 System and method for driving LED  
A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital...
7274158 System for driving plural lamps  
A system for driving a lamp module ( 13 ) includes a converter ( 11 ), a driving circuit ( 12 ), and a pulse width modulation (PWM) controller ( 14 ). The lamp module includes a plurality of lamps....
7273286 Display device and light control method of the same  
Aspects of the invention can provide a display device capable of providing stable light control with simplified control and structure. A display device can include light sources in which light...
7274160 Multicolored lighting method and apparatus  
Illumination methods and apparatus, in which a first number of first light sources are adapted to generate first radiation having a first spectrum, and a second number of second light sources are...
7271794 Power saving circuit employing visual persistence effect for backlight modules  
A power saving circuit employing visual persistence effect for backlight modules aims to increase electric power at a duty mode to drive lighting units at a read end through driving units, and...
7271543 Method for providing bi-level illumination in a stair well  
A bi-level illumination system for power conservation correlated to the needs of a building stairwell, which even during work hours is only nominal functioning as it does as a back-up to...
7271549 Current balancing circuit for a multi-lamp system  
The present invention uses one or more transformers disposed between an inverter driver to drive a plurality of lamps. Each transformer has a first coil and a second coil magnetically coupled to...
7268500 Control device for multiple lamp currents of liquid crystal display backlight source  
A control device for multiple lamp currents of a liquid crystal display (LCD) backlight source, comprising an electronic power switch, a transformer, an inverter and an integrated circuit (IC)...
7262558 Lamp current control device  
A lamp current control device includes an electronic power switch, a transformer, a current transformer and a pulse width modulation (PWM) IC. The transformer has its primary side connected to the...
7256557 System and method for producing white light using a combination of phosphor-converted white LEDs and non-phosphor-converted color LEDs  
A system and method for generating white light involves using a combination of phosphor-converted white LEDs and non-phosphor-converted color LEDs to produce white light and adjusting the emitted...
7253571 Wireless power supply and method of supplying power  
A wireless power supply and method of wirelessly supplying power use light to directly supply power wirelessly to an electrical apparatus without a power cable. The wireless power supply includes:...
7253569 Open lamp detection in an EEFL backlight system  
A method according to one embodiment may include supplying power to plurality of External Electrode Fluorescent Lamps (EEFLs). The method of this embodiment may also include generating signals...
7250731 Primary side current balancing scheme for multiple CCF lamp operation  
A backlight system drives multiple lamps using balanced groups of serially-connected lamp transformers. A plurality of lamp transformers is divided into multiple transformer groups. Primary...
7242151 Multiple lamp balance transformer and drive circuit  
The invention describes a multiple lamp balance transformer and a drive circuit. The multiple lamp balance transformer has two magnetic cores with a closed magnetic flux path and two coils wound...
7239091 Discharge lamp lighting apparatus for lighting multiple discharge lamps  
A discharge lamp lighting apparatus is provided for lighting a plurality of discharge lamps including one reference lamp and at least one controllable lamp. First variable inductance element and...
7239092 Limited open circuit voltage ballast  
A lighting system employs a pair of ballast input stages ( 21 ) operable to oscillate at different oscillating frequency (f 1, f 2 ) upon an initial powering of the ballast input stages ( 21 )....
7235934 Method for controlling operations of a backlight unit of a liquid crystal display  
A method for controlling operations of a backlight unit of a liquid crystal display (LCD) is disclosed. The LCD includes a LCD panel and the backlight unit. The LCD panel has a plurality of display...
7233116 Method for stabilizing brightness of a cold cathode fluorescent lamp and related apparatus  
A method for stabilizing brightness of a cold cathode fluorescent lamp includes receiving currents from two ends of the cold cathode fluorescent lamp and providing a current for the cold cathode...
7230390 Cold cathode fluorescent lamp assembly  
A cold cathode fluorescent lamp (CCFL) assembly includes a pair of CCFLs, and an inverter-type drive circuit. The drive circuit includes a first transformer having a primary winding adapted to be...
7230392 Analog control of light sources  
Analog control of a plurality of light sources, such as light-emitting diodes (LEDs), to generate multiple colors of light. An electronic circuit controls three or more analog outputs in response...
7227315 Discharge lamp drive apparatus and liquid crystal display apparatus  
A discharge lamp drive apparatus includes: an inverter circuit; a transformer; a plurality of discharge lamp connection terminals; a plurality of ballast capacitors; a plurality of voltage...
7224131 High efficiency lighting system  
A high efficiency lighting system maintains normal lighting conditions by lighting fixtures requiring DC electrical power. A power control device receives AC electrical power from a public utility...
7221110 Lighting control system and method  
A lighting control system includes a plurality of light controllers. Each light controller contains a microprocessor-based intelligence. The plurality of light controllers form a distributed...
7221109 Stage lighting console  
Embodiments of a stage lighting console are disclosed which may be used to control the light level of a plurality of stage lighting interments. The stage lighting console includes a plurality of...
7221108 Apparatus of driving lamp and liquid crystal display device using the same  
An apparatus of driving a lamp includes a first inverter board having a first inverter for supplying a first high-voltage alternating-current waveform via a first high-voltage line to a first...
7221105 Electromagnetic radiation emitting bulb and method using same in a portable device  
An electromagnetic radiation emitting bulb, comprising a housing; one or more power input terminals disposed on that housing; a voltage converter disposed within the housing, where the voltage...
7221104 Linear lighting apparatus and methods  
Linear lighting systems and methods. In one example, two or more lighting elements having an essentially linear or curvilinear shape are coupled together to form a lighting system. Each lighting...
7215088 System and architecture for controlling lighting through a low-voltage bus  
A system and architecture for managing lighting through a seamless low-voltage bus network is disclosed. The system comprises a plurality of control units that serve as nodes for integrating...
7211967 Strip light with constant current  
A strip light is disclosed. The light comprises an illuminating unit including a plurality of illuminators (e.g., LEDs) directly and electrically coupled in series, and a constant current...
7205729 Control system and method for controlling lighting and video devices  
A control system for lighting and video devices, wherein said control system includes at least one video device; at least one lighting device; and a software protocol, capable of communicating...
7202607 Year-round decorative lights with time-multiplexed illumination of interleaved sets of color-controllable LEDS  
A decorative lighting apparatus provides user-selectable color schemes corresponding to several holidays and other occasions for year-round use. In one illustrative example, the decorative lighting...
7202614 Electronic ballast for a fluorescent task lamp  
An electronic ballast circuit for a handheld fluorescent task lamp, comprising a self-starting electronic driver circuit operated by a power supply and operable to start and run at least first and...
7202611 Discharge lamp lighting device  
A device for lighting a discharge lamp has a drive circuit to feed alternating power the discharge lamp, and a control circuit. The control circuit controls the drive circuit by a drive pulse to...
Matches 151 - 200 out of 515 < 1 2 3 4 5 6 7 8 9 10 11 >