Color LED driver

Details Color LED driver Color LED driver

2011-01-18

2011-01-18

Wang, Quan-Zhen (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S083000, C345S084000

Reexamination Certificate

active

07872621

ABSTRACT:
Disclosed herein is a color LED driver, which is capable of being implemented by a compact structure without a feedback structure and accompanying a small size and low cost, by directly connecting a negative temperature coefficient (NTC) thermistor to a driving current path of a color LED applied to an LCD backlight to compensate a characteristic variation of the LED due to a variation in a temperature. The color LED driver includes a driving constant voltage source100which supplies a predetermined driving constant voltage VD; a driving circuit200which converts the driving constant voltage VD of the driving constant voltage source100into a plurality of driving currents, for driving color LEDs, the plurality of driving currents including red LED driving current Ird, green LED driving current Igd and blue LED driving current Ibd; a temperature compensation unit300which compensates variations in the red LED driving current Ird and the green LED driving current Igd due to a variation in a temperature, among the plurality of driving currents from the driving circuit200; and an LED unit400including a plurality of color LEDs which are turned on by the driving currents from the temperature compensation circuit300and the driving current from the driving circuit200.

REFERENCES:
patent: 6242870 (2001-06-01), Koyanagi et al.
patent: 6690146 (2004-02-01), Burgyan et al.
patent: 6747617 (2004-06-01), Kawashima
patent: 7144130 (2006-12-01), Toyota et al.
patent: 7330002 (2008-02-01), Joung
patent: 2002/0070914 (2002-06-01), Bruning et al.
patent: 2007/0080905 (2007-04-01), Takahara
patent: 2007/0120496 (2007-05-01), Shimizu et al.
patent: 1 672 706 (2006-06-01), None
patent: 11-298044 (1999-10-01), None
patent: 2001-287398 (2001-10-01), None
patent: 2002-237645 (2002-08-01), None
patent: 2004-515891 (2004-05-01), None
patent: 2006-135007 (2006-05-01), None
patent: 2006-237282 (2006-09-01), None
patent: 2007-095291 (2007-04-01), None
patent: 2007-134194 (2007-05-01), None
patent: 2007-165632 (2007-06-01), None
patent: 2009-514206 (2009-04-01), None
patent: WO 02/47438 (2002-06-01), None
patent: WO 2005/011006 (2005-02-01), None
patent: WO 2006/006537 (2006-01-01), None
patent: WO 2007/049180 (2007-05-01), None
Korean Office Action, with English Translation, issued in Korean Patent Application No. KR 10-2006-0007459, mailed on Apr. 23, 2007.
Chinese Office Action, with English Translation, issued in Chinese Patent Application No. CN 200710002656.7, dated Sep. 19, 2008.

Affiliated with

Also associated with

Rating

Color LED driver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color LED driver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color LED driver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2704878