Illumination device

Details Illumination device Illumination device

2006-12-05

2006-12-05

Ward, John Anthony (Department: 2875)

Illumination

Plural light sources

Particular wavelength

C362S551000, C362S552000, C315S291000

Reexamination Certificate

active

07144130

ABSTRACT:
An illumination apparatus for illumination of light by emitting light from LED for each of RGB colors capable of optionally setting a color temperature and controlling the brightness after the setting while maintaining the color temperature as it is, in which a light control circuit supplies a light control voltage for variably controlling the light quantity of the illumination light equally to each color setting circuit connected with LED of each color which is lit by a light quantity in proportion with a driving current and a color temperature setter of the color temperature setting circuit adjusts the light control voltage by a predetermined ratio to a control voltage, and a constant current circuit outputs a driving current in accordance with the control voltage to each LED for each of RGB colors.

REFERENCES:
patent: 4237475 (1980-12-01), Sekiguchi
patent: 6394626 (2002-05-01), McColloch
patent: 6636003 (2003-10-01), Rahm et al.
patent: 6921920 (2005-07-01), Kazakevich
patent: 2004/0052076 (2004-03-01), Mueller et al.
patent: 2004/0264186 (2004-12-01), Tabell
patent: 08-250771 (1996-09-01), None
patent: 2001-257379 (2001-09-01), None
patent: 2001-257397 (2001-09-01), None
patent: 2001-135857 (2002-05-01), None
patent: 2002-238846 (2002-08-01), None
patent: 2002-246651 (2002-08-01), None
patent: 2003-060223 (2003-02-01), None
English language Abstract of JP 08-250771, Published Sep. 27, 1996.
English language Abstract of JP 2001-135857. Published May 18, 2002.
English language Abstract of JP 2002-238846, Published Aug. 27, 2002.
English language Abstract of JP 2003-060223, Published Feb. 28, 2003.
English language Abstract of JP 2002-246651, Published Aug. 30, 2002.
English language Abstract of JP 2001-257397, Published Sep. 21, 2001.
English Language Abstract of JP2001-257379.

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