Method and apparatus for the closed loop and open loop...

Details Method and apparatus for the closed loop and open loop... Method and apparatus for the closed loop and open loop...

2007-11-06

2007-11-06

Chen, Shih-Chao (Department: 2821)

Electric lamp and discharge devices: systems

With load device temperature modifier

Automatic control of the temperature modifier

C315S309000

Reexamination Certificate

active

11337608

ABSTRACT:
An apparatus for the closed-loop and open-loop control of filament heating for a lamp, in particular for a fluorescent lamp, has a control loop into which a first filament (W1), an operational-parameter detection element (E), a heating controller (H) and a first actuating element (S1) are connected. The heating poser of the first filament (W1) is detected by means of the operational-parameter detection element (E) and, on the basis of this, a manipulated variable (SG) is determined, by means of which this first filament (W1) is subjected to closed-loop control. Furthermore, at least one second filament (W2to Wn), which is not connected in the control loop, is controlled on the basis of the determined manipulated variable (SG).

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European Search Report dated May 17, 2006 from corresponding EP Application No. 06000746.5, 6 pages.

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