Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1995-01-17
1996-02-20
Pascal, Robert J.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315307, 315308, 315311, 315314, 315DIG4, G05F 100
Patent
active
054931827
ABSTRACT:
To provide for dimmer operation of a fluorescent lamp (L) with a minimum of circuit components, the d.c. output level at an output terminal (C1) of an energy supply source, such as a switched mode power supply (10, 10'), is controlled in accordance with the setting of a dimmer control (D). The voltage level at the output capacitor (C1) of the switched mode d.c. power supply furnishes supply voltage for an inverter (T1, T2) coupled to the discharge lamp. During lamp operation, a control unit (R) controls the level of the d.c. voltage supply for the inverter in accordance with the dimmer setting. This permits change of the brightness of the fluorescent lamp (L) in a range of from 5% to 100% of nominal value. Preferably, control of the supply voltage for the inverter is activated only upon occurrence of the ignition or arc-over phase, for example under control of a timing circuit (ZS), controlling a relay in the preheating circuit of the lamp. The system has the advantage that the lamp does not fire or ignite at full power level but only at the power level controlled by the dimmer (D).
REFERENCES:
patent: 4808887 (1989-02-01), Fahnrich et al.
patent: 5041763 (1991-08-01), Sullivan et al.
patent: 5122712 (1992-06-01), Hirschmann
patent: 5187414 (1993-02-01), Fellows et al.
patent: 5262701 (1993-11-01), Derra et al.
patent: 5394064 (1995-02-01), Ranganath et al.
IBM Technical Disclosure Bulletin, vol. 35, No. 7, Dec. 1992, pp. 28-29, mbined Dimmer and Voltage Regulator Circuit For Fluorescent Lamp Inverter".
"Getaktete Stromversorgung"(Switched Power Supplies), by J. Beckman, published by Franzis-Verlag GmbH, p. 17-19 (1990).
"Schaltnetzteile")Switched Circuitry) by W. Hirschmann and A. Hauenstein, published by Siemens AG, Edition 1990 , p. 63.
Kreutner Christoph
Sowa Wolfram
Pascal Robert J.
Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbH
Philogene Haissa
LandOfFree
Fluorescent lamp operating circuit, permitting dimming of the la does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluorescent lamp operating circuit, permitting dimming of the la, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluorescent lamp operating circuit, permitting dimming of the la will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1357945