Global Patent Index - EP 2293276 A1

EP 2293276 A1 20110309 - Backlight unit and control method for the same

Title (en)

Backlight unit and control method for the same

Title (de)

Rücklichteinheit und Steueurverfahren dafür

Title (fr)

Unité de rétro-éclairage et méthode de control associée

Publication

EP 2293276 A1 20110309 (EN)

Application

EP 09169185 A 20090901

Priority

EP 09169185 A 20090901

Abstract (en)

Presented is a backlight unit and control method for the same. The backlight unit comprises a plurality of spatially arranged light sources and a light source controller adapted to supply a control signal for controlling a brightness of the light sources. When the control signal is adapted to control the plurality of light sources to output a maximum operating brightness for the backlight unit, the luminance value of each of the plurality of light source units is substantially equal to a nominal 100% luminance value. The light source controller is adapted modify the control signal so as to control the luminance value of one or more first light sources to be greater than the nominal 100% luminance value and to control the luminance value of one or more light second sources to be less than the nominal 100% luminance value.

IPC 8 full level

G09G 3/34 (2006.01); G09G 3/20 (2006.01)

CPC (source: EP)

G09G 3/3426 (2013.01); G09G 3/006 (2013.01); G09G 3/342 (2013.01); G09G 2300/0452 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/041 (2013.01); G09G 2320/064 (2013.01); G09G 2320/0646 (2013.01); G09G 2330/021 (2013.01); G09G 2330/045 (2013.01); G09G 2340/06 (2013.01)

Citation (applicant)

US 2004046725 A1 20040311 - LEE BAEK-WOON [KR]

Citation (search report)

  • [XY] WO 2007143463 A2 20071213 - CLAIRVOYANTE INC [US], et al
  • [A] EP 2061288 A1 20090520 - SHARP KK [JP]
  • [Y] US 2006103621 A1 20060518 - FENG XIAO-FAN [US]
  • [Y] WO 2007141721 A1 20071213 - NXP BV [NL], et al
  • [A] US 2005140612 A1 20050630 - BAEK HEUM-IL [KR]
  • [Y] PIERRE DE GREEF AND HENDRIEK GROOT HULZE NXP SEMICONDUCTORS (FOUNDED BY PHILIPS) ET AL: "39.1: Adaptive Dimming and Boosting Backlight for LCD-TV Systems", 20 May 2007, SID 2007, 2007 SID INTERNATIONAL SYMPOSIUM, SOCIETY FOR INFORMATION DISPLAY, LOS ANGELES, USA, PAGE(S) 1332 - 1335, ISSN: 0007-966X, XP007013259
  • [A] TOSHIBA: "toshiba led lamps", DATASHEET, 24 February 2009 (2009-02-24), XP002548587, Retrieved from the Internet <URL:http://www.farnell.com/datasheets/90909.pdf> [retrieved on 20091001]
  • [A] CHINA YOUNG SUN LED TECH: "RGB tripple color dot matrix", DATASHEET, 16 December 2008 (2008-12-16), XP002548632, Retrieved from the Internet <URL:http://www.sparkfun.com/datasheets/Components/YSM-2388CRGBC.pdf> [retrieved on 20091001]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2293276 A1 20110309

DOCDB simple family (application)

EP 09169185 A 20090901