Abstract:
The present invention relates to an adaptive driver for driving a gas discharge lamp and a method for operating a gas discharge lamp driven by an adaptive driver, especially a capacitive gas discharge lamp and more especially a dielectric barrier discharge (DBD) lamp in a permanent optimized mode comprising the steps: measuring, sensing, and/or detecting a signal representing the key values of the output of the driver (current, power, voltage, frequency), calculating at least one actual reference value for the quality of the discharge of said lamp, comparing said actual reference value to at least one predefined value for an optimized operation mode of said lamp, and adjusting a power supply according to the result of said comparing.
Abstract:
There are provided an electrodeless discharge lamp lighting device with small size and low cost by simplifying a noise suppression part and a lighting apparatus having the electrodeless discharge lamp lighting device. A counter circuit 41 of a frequency signal generating circuit 4 repeatedly generates a frequency signal of which the amplitude is varied in a multi-step shape on the basis of an oscillation period of an oscillation circuit 40. An oscillation circuit 5 outputs an oscillation signal of a frequency corresponding to the amplitude of the frequency signal. A drive circuit 6 drives a switching element of an inverter circuit 2 at the frequency of the oscillation signal and the inverter circuit 2 applies a high-frequency voltage generated by the switching operation of the switching element to an induction coil 3 to start up and light the electrodeless discharge lamp La. That is, a high-frequency voltage which is varied at three discrete frequencies f1, f2, and f3 is repeatedly and periodically applied to the induction coil 3 and thus a magnetic-component noise generated from a discharge lamp lighting device A is distributed into three frequency components.
Abstract:
A method of generating an electrical discharge in a gas contained in a sealed enclosure. The method includes driving a helical coil resonator at an RF frequency to generate an RF electric-magnetic field sufficient to generate an electrical discharge in the high pressure gas. The electrical discharge produces an emission spectrum that may be spectroscopically analyzed to determine the composition and impurity content of the gas.
Abstract:
Die Erfindung betrifft eine Wandlerschaltung, insbesondere mit einem Klasse-E-Wandler, mit einer verbesserten Ansteuerschaltung für einen Schalttransistor MOS1 mit zwei seriell verschalteten, schwellenwertabhängig arbeitenden Bauteilen, insbesondere Komparatoren K1, K1' und K2, K2'.
Abstract:
An electronic circuit topology (1) for driving a predominantly capacitive load (2) with a primary circuit with several components, a secondary circuit with a predominantly capacitive load (2), and a transformer device (4) with a primary side (TX Ia) and a secondary side (TX Ib), connecting the primary circuit with the secondary circuit, the primary circuit components comprise: a source device (3), a drain device (5), and a switching device (6), the transformer device (4) is for transforming an input voltage-current-signal to a suitable output voltage-current signal for supplying the predominantly capacitive load (2), wherein the source device (3) is in serial connection with the transformer device (4), the drain device (5), and the switching device (6), whereby the transformer device (4) comprises means for functioning as a resonant tank circuit, as a transformer device (4) in forward mode, and as a transformer device (4) in flyback mode, so that an single-ended forward-flyback circuit is achieved.
Abstract:
La présente invention concerne un dispositif d'alimentation électrique (1) destiné à fournir en énergie une structure (2) qui comporte au moins deux électrodes (20, 21) et un espace dans lequel règne un gaz (24) destiné à être excité, le dispositif comportant un générateur de tension (10), une inductance (41, 42) connectée au générateur (10) et reliée à la structure pour alimenter les deux électrodes avec une tension périodique (V(t)) de fréquence donnée, caractérisé en ce qu'il comprend des moyens dits de résonance pour fixer ladite fréquence sensiblement à la fréquence de résonance f R du système qui est constitué de la structure (2) et de ladite inductance (42).
Abstract:
A discharge lamp device comprising a discharge lamp DL and a lighting circuit. The discharge lamp DL comprises a tubular translucent airtight container (1), a fluorescent element layer (2), an inner electrode (4), a discharge medium mainly consisting of Xenon and an outer electrode (5). The lighting circuit outputs a pulsating voltage, for application between the inner electrode (4) and the outer electrode (5) of the discharge lamp DL. The lighting circuit is constructed so as to satisfy the following expression when a Xenon sealing partial pressure in the discharge lamp DL is P(kPa), a total discharge charge amount produced during one frequency of a lamp current Q(nC), and a total shutdown time Ts(µs): Ts.P/Q>=0.5.
Abstract:
An electrodeless discharge lamp lighting device comprising an AC/DC converting unit (5) for converting ac voltage phase-controlled by a dimmer (2) into dc, a DC/AC converting unit (6) for converting an output from the AC/DC converting unit (5) into high frequency for application to a discharge lamp and intermittent driving of the discharge lamp, and a dimming control unit (7) for generating a dimming command signal that intermittently drives the converting unit (6) and outputting the dimming command signal to the converting unit (6) via a photo-coupler (9), the turning-on and turning-off timings of the above phase-controlled voltage being respectively synchronized with the on and off timings of driving of the DC/AC converting unit (6).