Light with simulated candle flicker

Details Light with simulated candle flicker Light with simulated candle flicker

2005-08-09

2005-08-09

Tso, Laura K. (Department: 2875)

Illumination

Self powered lamp

Having plural lamp bulbs or lamp sockets

C362S259000, C362S800000, C362S806000, C362S810000

Reexamination Certificate

active

06926423

ABSTRACT:
A device and system for simulating the flicker of candle flame is provided by the present invention. A series of independent charging and discharging circuits are provided that produce power waveforms having duty cycles that vary from a highest duty cycle to a lowest duty cycle. The power waveforms are provided to a series of LEDs arranged in a vertical stack. The lowest duty cycle power waveform is provided to the highest LED in the stack and the highest duty cycle power waveform is provided to the lowest LED in the stack. An approximately flame shaped housing that is partially translucent is positioned around the vertical stack of LEDs such that the light from the LEDs is visible while the LEDs themselves are not. A solar panel and an associated rechargeable battery are used to power the device.

REFERENCES:
patent: 4510556 (1985-04-01), Johnson
patent: 4593232 (1986-06-01), McEdwards
patent: 4839780 (1989-06-01), Chuan et al.
patent: 5013972 (1991-05-01), Malkieli et al.
patent: 5097180 (1992-03-01), Ignon et al.
patent: 5600209 (1997-02-01), St. Louis
patent: 5924784 (1999-07-01), Chliwnyj et al.
patent: 6066924 (2000-05-01), Lederer
patent: 6198229 (2001-03-01), McCloud et al.
patent: 6719443 (2004-04-01), Gutstein et al.

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