Light emitting apparatus comprising multiple groups of LEDs each

Details Light emitting apparatus comprising multiple groups of LEDs each Light emitting apparatus comprising multiple groups of LEDs each

1995-03-10

1997-01-28

Pascal, Robert

Electric lamp and discharge devices: systems

Plural series connected load devices

Christmas lights

315160, 315363, 361 23, 361 27, 361800, 34082582, 345 82, 345212, 345134, 345905, H05B 4300

Patent

active

055980686

ABSTRACT:
A plurality of LEDs are divided into multiple groups with the LEDs in each group being connected in series and being driven by a single current source. A region to be illuminated is divided into many areas with no spacing between adjacent ones of the areas. The LEDs in each group are positioned in different areas such that each area includes many LEDs from different groups. If one of the current sources and/or one of the LEDs of one group breaks down, the broken current source and/or LED does not affect the current sources and/or LEDs of the other groups.

REFERENCES:
patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 5012162 (1991-04-01), Chun

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