EP 1583399 A2 20051005 - Array of light emitting diodes
Title (en)
Array of light emitting diodes
Title (de)
Leuchtdiodenfeld
Title (fr)
Matrice de diodes électroluminescentes
Publication
Application
Priority
GB 0407574 A 20040403
Abstract (en)
The invention concerns LED arrays of the type in which one or more "strings" of LEDs such as 6 are series connected across a potential difference as at 8, 10. To compensate for changes in forward voltage of individual LEDs 4, and/or for supply voltage variations, a switching means (which may be formed as a transistor T2, T3) is provided for selectively removing one or more LEDs from the strings. This can for example be done by selectively shorting the chosen LEDs.
IPC 1-7
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/395 (2020.01 - US); H05B 45/44 (2020.01 - EP); H05B 45/36 (2020.01 - US); H05B 45/46 (2020.01 - EP); H05B 45/48 (2020.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1583399 A2 20051005; EP 1583399 A3 20061004; GB 0407574 D0 20040505
DOCDB simple family (application)
EP 05251845 A 20050324; GB 0407574 A 20040403