Lighting apparatus and method for controlling brightness and...

Details Lighting apparatus and method for controlling brightness and... Lighting apparatus and method for controlling brightness and...

2005-07-27

2008-10-28

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S224000, C315S291000

Reexamination Certificate

active

07443104

ABSTRACT:
A lighting apparatus emitting polychromatic light comprising light of at least two light-channels with different colors, wherein each light-channel is controlled by one modified pulse-width-modulated signal (modified PWM-signal), and each modified PWM-signal results from the modulation of one color-pulse-width-modulated signal (color-PWM-signal) with an intensity-pulse-width-modulated signal (intensity-PWM-signal) in order to control the brightness and color location of the polychromatic light.

REFERENCES:
patent: 6956337 (2005-10-01), Kemper
patent: 7173383 (2007-02-01), Vornsand et al.
patent: 2002/0070914 (2002-06-01), Bruning et al.
patent: 2004/0155608 (2004-08-01), Trinschek et al.
Search Report from the European Patent Office dated Nov. 22, 2006, for Application No. 06012415.3-2205 by Examiner Iacopo Giancane.

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