Abstract: The present description concerns a device for delivering a voltage from an AC voltage, comprising a capacitive element (120), two switches (132H, 132L) in a half-bridge between terminals of the capacitive element (120); terminals (102, 104) of application of the AC voltage; a transformer (160), comprising a first winding (162) coupling to a junction node (136) between the switches (132H, 132L) one of the terminals (104) of application of the AC voltage; and one or a plurality of circuits (170, 180, 140), configured to switch the switches (132H, 132L) and receive an AC current (I164) flowing through a second winding (164) of the transformer (160) and regulate the voltage delivered by the device by acting on a frequency of said AC current and/or on a phase shift of said AC current with respect to its reception.

Abstract: A method includes forming one or more capacitors over a substrate. The method also includes forming a transformer at least partially over the substrate. The transformer is adjacent to at least one of the one or more capacitors. At least a portion of the transformer is formed at a same level over the substrate as the one or more capacitors. The method further includes coupling the one or more capacitors and the transformer to at least one embedded integrated circuit die. The one or more capacitors, the transformer, and the at least one embedded integrated circuit die form at least part of a light emitting diode (LED) driver.

Abstract: A lighting system comprising a first plurality of fluorescent lamps (17) constituted by a first and a second lamp (20, 21) having a first common terminal (18) which is connected via a first capacitor (22) to a first terminal (12) of a voltage source (11). The system further comprises a second plurality of fluorescent lamps (29) constituted by a third and a fourth lamp (32, 33) having a first common terminal (30) which is connected via a second capacitor (34) to the first terminal (12) of a voltage source (11). The second terminals of the first lamp (20) and third lamp (32) are connected to a first terminal (24) of a third capacitor (25), said third capacitor (25) being connected with its second terminal to the second terminal (13) of the voltage source (11). The second terminals of the second lamp (21) and fourth lamp (33) are connected to a first terminal (36) of a fourth capacitor (37), the fourth capacitor (37) being connected with its second terminal to the second terminal (13) of the voltage source (11).

Abstract: A lighting device for a display device includes a plurality of light sources, a power source arranged to provide drive power for the light sources, a common electrode arranged to supply the drive power to the plurality of light sources, a plurality of holder electrodes arranged to hold the respective light sources and supply the drive power from the common electrode individually to the respective light sources, and a dielectric portion provided between the common electrode and each of the holder electrodes.

Abstract: The invention relates to a method for the monitoring of a plurality of at least three electrical lighting bodies of the same design, comprising a. Imposition on the plurality of lighting bodies of at least one supply signal from at least one ballast device, b. Reading out of at least one parameter for each of the individual lighting bodies in each case, c. Forming of at least one reference value from at least some of the parameters read out from the different lighting bodies, d. Comparison of the reference value with the parameter of each individual one of the lighting bodies, e. Generation of a signal for each lighting body of which the parameter exceeds a specified deviation from the reference value.

Abstract: A lighting device for a display device includes a plurality of light sources, a power source arranged to provide drive power for the light sources, a common electrode arranged to supply the drive power to the plurality of light sources, a plurality of holder electrodes arranged to hold the respective light sources and supply the drive power from the common electrode individually to the respective light sources, and a dielectric portion provided between the common electrode and each of the holder electrodes.

Abstract: A lighting device for a display device includes a plurality of light sources, a power source arranged to provide drive power for the light sources, a common electrode arranged to supply the drive power to the plurality of light sources, a plurality of holder electrodes arranged to hold the respective light sources and supply the drive power from the common electrode individually to the respective light sources, and a dielectric portion provided between the common electrode and each of the holder electrodes.

Abstract: Provided is a load driving device controlling a drive of a load including a driver for periodically turning on/off a current according to a switching clock signal and supplying a average driving current to the load. Further provided is a dimming controller for controlling the driver to turn on/off the drive of the load based on a dimming step. Also provided is a controller for controlling at least one of the driver and the dimming controller so as to make a step interval of the dimming step and a switching clock period of the switching clock signal the same. A load driving device is provided that is capable of stably controlling the dimming of a drive of a load, by improving a linear response characteristic of a driving current according to a dimming control.

Abstract: Disclosed herein is a back light device for LCDs. The back light device includes an inverter to supply an alternating current or a pulse, a plurality of fluorescent lamps to radiate visible light, a reflection member to reflect the light radiated from the fluorescent lamps, a diffusion member to diffuse the light, and a frame to house the above elements therein. An external electrode is provided at a first end of each of the fluorescent lamps, and an internal electrode is provided at a second end of each of the fluorescent lamps. An extension electrode is provided on an outer surface of the second end of each of the fluorescent lamps to be connected to an associated internal electrode. A holding terminal is provided at each of both ends of each fluorescent lamp to connect the external and extension electrodes to each other. Further, an inverter is provided to operate the fluorescent lamps.

Abstract: The object of this invention is to provide a direct-type back light device, capable of maintaining uniform luminance, and reducing manufacturing costs and power consumption, in addition to being easy to assemble and to accomplish thinness. The back light device includes a frame, a diffusion member provided in an upper portion of the frame to diffuse light, a plurality of fluorescent lamps provided under the diffusion member to radiate the light, a reflection member provided under the plurality of fluorescent lamps to reflect the light radiated from the fluorescent lamps, a lamp holder to hold each of the plurality of fluorescent lamps, an inverter to turn on or off the plurality of fluorescent lamps, and a capacitive circuit element and an insulator provided on first and second ends of the fluorescent lamps, respectively, to connect the plurality of the fluorescent lamps to the inverter in parallel with each other.

Abstract: An apparatus for illuminating an electronic display such as an LCD. A single hot wire is connected to multiple capacitors each dedicated to a cold cathode fluorescent tube, and multiple tubes are incorporated to illuminate the electronic display. Multiple hot wires are eliminated to eliminate excessive electrical losses and to reduce manufacturing cost.

Abstract: An electrodeless high intensity arc discharge lamp employs an excitation coil comprised of a high-temperature metal, such as tungsten or molybdenum, wound directly on the hot quartz envelope of the arc tube within the interior of the outer glass envelope of the lamp, thereby requiring substantially lower current and voltage from the power supply than such lamps having external excitation coils, while emitting less electromagnetic noise. The excitation coil losses are comparable to those of the external excitation coils or prior electrodeless high intensity arc discharge lamps.

Abstract: A circuit for operating a discharge lamp (1) by means of a direct voltage. The circuit comprises direct voltage terminals (A,B) for connection of a direct voltage source, alternating voltage output terminals (K,L) for connection to the discharge lamp, a direct voltage/alternating voltage sine converter (3), and a current limiter (5) for limiting the current through the lamp in its operating condition. A controllable direct voltage converter (2) is coupled between the sine converter and the direct voltage input terminals.

Abstract: A fluorescent lamp ballasting means comprises a conventional voltage doubler, which voltage doubler is adapted to operate from a regular power line AC input voltage and to supply a unidirectional output current to the fluorescent lamp. After the lamp has been started, the resulting lamp current is determined in part by the size of the capacitors used in the voltage doubler and in part by the impedance of an impedance means connected in series between the lamp and the voltage doubler.By choosing the magnitude of the voltage doubler capacitors such as to constitute the major lamp-current-determining factor, a relatively good overall systems efficacy is obtained.Lamp starting is aided by capacitively coupling the input AC voltage to the lamp in a fashion additive to the DC voltage provided by the voltage doubler--this DC voltage being coupled to the lamp by way of a rectifying means. As a result, the peak lamp starting voltage is equal to four times the peak voltage of the input AC voltage.

Abstract: The present application discloses a circuit for improving the efficiency of energy consumption, extending lamp life, and facilitating the starting and steady state flickerless operation of a discharge lamp normally utilizing a source of alternating current, such circuit including: (a) a full wave rectifier connected between both an input set of terminals and an output set of terminals, the input set comprising the AC line input leads and the output set comprising the positive and negative supply leads of the lamp; (b) a voltage-raising capacitance disposed between one terminal of the AC input and one or both terminals of the rectifier output; and (c) a filtering means connected between the positive and negative output of said full wave rectifier, wherein the output of the voltage-raising capacitance is applied across the filtering means, thereby providing a no-load voltage at the output leads which is approximately equal to (2.sqroot.2) .sup.E input (rms).