Method and device for driving LED element, illumination...

Details Method and device for driving LED element, illumination... Method and device for driving LED element, illumination...

2005-01-28

2009-08-11

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S082000, C345S204000, C345S609000, C345S691000

Reexamination Certificate

active

07573446

ABSTRACT:
A driving method and a driving device are provided for an LED element in which light emitting layers different from each other in light emission wavelength peak, put on each other with a barrier layer being interposed, are sandwiched by a pair of p-type and n-type layers, and color of emitted light from which substantially depends only upon driving current value. The method comprises a driving current value calculation step of obtaining a value for designating a current value corresponding to a desired color of emitted light from the LED element; a driving current generation step of generating a driving current having the current value designated by the value obtained in the driving current value calculation step; and a driving current supply step of supplying the LED element with the driving current generated in the driving current generation step.

REFERENCES:
patent: 4666793 (1987-05-01), Hirate
patent: 6628249 (2003-09-01), Kamikawa et al.
patent: 06-268332 (1994-09-01), None
patent: 11-121806 (1999-04-01), None
patent: 2001-144332 (2001-05-01), None
patent: 2001/272938 (2001-10-01), None
patent: 2002-237619 (2002-08-01), None
patent: 2002-261334 (2002-09-01), None
patent: 2002/261334 (2002-09-01), None
patent: 2002/324685 (2002-11-01), None
Partial English Language Translation of JP 06-268332.

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