摘要:
A low-power wireless network involves a plurality of RF-enabled fluorescent lamp starter units. In each of a plurality of intervals, a receiver of a starter unit operates in a receive mode during a beacon slot time, and for the majority of the rest of the interval operates in a low-power sleep mode. The starter unit wakes up and listens for a beacon each beacon slot time, regardless of whether a beacon is transmitted during that interval or not. A starter unit can be commanded to schedule a future action (for example, for a time between widely spaced synchronizing beacons) by making one of the beacons a scheduling beacon. The scheduling beacon includes a field that the starter unit uses to schedule the future action. If the scheduled action is to be canceled before the next widely spaced synchronizing beacon, then an action-canceling beacon is communicated in the next interval.
摘要:
A low-power wireless network involves a plurality of RF-enabled fluorescent lamp starter units. In each of a plurality of intervals, a receiver of a starter unit operates in a receive mode during a beacon slot time, and for the majority of the rest of the interval operates in a low-power sleep mode. The starter unit wakes up and listens for a beacon each beacon slot time, regardless of whether a beacon is transmitted during that interval or not. A starter unit can be commanded to schedule a future action (for example, for a time between widely spaced synchronizing beacons) by making one of the beacons a scheduling beacon. The scheduling beacon includes a field that the starter unit uses to schedule the future action. If the scheduled action is to be canceled before the next widely spaced synchronizing beacon, then an action-canceling beacon is communicated in the next interval.
摘要:
@ One (46) of the low voltage output windings (42,44,46) of a standard ballast circuit (16) is coupled to one filament (60) of a pair of series connected fluorescent lamps (10 and 12) through a regulating capacitor (62) and a current rectifying diode (64) which are connected in series across such output winding (46) and in parallel to the one filament.
摘要:
A fluorescent lamp starter circuit that incorporates the series arrangement of a glow-switch and a semiconductor switch. The semiconductor switch is coupled to a solid state timer. The solid state timer renders the semiconductor switch non-conductive after it has timed a predetermined maximum operation interval. The duration of lamp ignition attempts is thereby limited.
摘要:
A discharge lamp operating circuit is connected to a source of alternating current (AC) voltage, and has a discharge lamp and a semi-resonant circuit connected to the source of alternating current voltage and in series with the lamp. A starting circuit for initiating operation of said discharge lamp is also connected in the circuit. The lamp switching maintains the series semi-resonant circuit in oscillation and the series semi-resonant circuit maintains the lamp in operation after operation has been initiated by the starting circuit. Highly efficient energy transfer between inductive and capacitive components of the system result in low loss and high power factor. A variable capacitance circuit is provided to allow use of the discharge lamp operating circuit with different line voltages, and to allow dimming.
摘要:
A low-power wireless network involves a plurality of RF-enabled fluorescent lamp starter units. In each of a plurality of intervals, a receiver of a starter unit operates in a receive mode during a beacon slot time, and for the majority of the rest of the interval operates in a low-power sleep mode. The starter unit wakes up and listens for a beacon each beacon slot time, regardless of whether a beacon is transmitted during that interval or not. A starter unit can be commanded to schedule a future action (for example, for a time between widely spaced synchronizing beacons) by making one of the beacons a scheduling beacon. The scheduling beacon includes a field that the starter unit uses to schedule the future action. If the scheduled action is to be canceled before the next widely spaced synchronizing beacon, then an action-canceling beacon is communicated in the next interval.
摘要:
Zur Begrenzung des Gleichstromscheitelwertes und/oder des Anlaufwechselstromes nach dem Einschalten einer Entladungslampe (HL, NL), die an eine Wechselstrom-Versorgungsquelle (U) angeschlossen ist, wird vorgeschlagen, mit der üblichen zur Strombegrenzung dienenden Drossel (D) ein weiteres Strombegrenzungsschaltungsteil (B) in Serie zu schalten. Dieses befindet sich zum Zeitpunkt des Einschaltens der Entladungslampe in einem ersten Zustand, in welchem es den hindurchfließenden Strom stärker begrenzt, und schaltet nach Ablauf einer bestimmten Zeit in einen zweiten Zustand um , in welchem es den hindurchfließenden Stom weniger stark begrenzt. Die Umschaltung kann durch einen temperaturempfindlichen Schalter (S) erfolgen, der in Wärmekontakt mit einem sich durch den hindurchfließenden Strom erwärmenden Bauelement steht oder durch eine Steuerschaltung (ST).
摘要:
Dispositif d'amorçage électronique pour tubes fluorescents, du type de ceux qui sont connectés en parallèle avec le tube et en série avec un ballast. Ce dispositif est composé d'un commutateur hybride à l'état solide, réalimenté par un ensemble dispositif de prélèvement de ligne et filtre et par un atténuateur d'impulsions, connectés en série, les entrées du commutateur hybride et de l'ensemble dispositif de prélèvement de ligne et filtre étant connectées à une borne, et les sorties du commutateur hybride étant connectées à un générateur d'impulsions, dont la sortie est connectée à une seconde borne. Ces bornes sont destinées à être connectées à la ligne, au ballast et aux bornes shuntées du tube fluorescent.
摘要:
The present invention relates to a start auxiliary device for driving a gas discharge lamp cluster, the gas discharge lamp cluster comprising n gas discharge lamps connected in series, the start auxiliary device comprises: a primary start circuit including a primary start capacitor (C1) and a primary start inductor (L1); and a step-up unit (T1) including a first terminal (101), a second terminal (102), and a third terminal (103).When the step-up unit (T1) is excited by the primary start capacitor (C1) and the primary start inductor (L1) of the primary start circuit, the step-up unit (T1) outputs a high auxiliary start voltage at the third terminal (103) to start the respective gas discharge lamps in the gas discharge lamp cluster. In addition, the present invention also relates to a ballast having the start auxiliary device and an illumination device having the ballast.