EP 2822359 A1 20150107 - Improvements in and relating to displays and light sources for displays
Title (en)
Improvements in and relating to displays and light sources for displays
Title (de)
Verbesserungen an und in Zusammenhang mit Anzeigen und Lichtquellen für Anzeigen
Title (fr)
Améliorations apportées à et associées à des écrans et des sources de lumière pour affichages
Publication
Application
Priority
EP 13275158 A 20130705
Abstract (en)
A light source for a colour display apparatus (1) for displaying light at optical wavelengths corresponding a plurality of different colours sequentially, comprising a plurality of light-emitting diodes (3, 4, 5) each respectively operable to emit light to display a respective one of the plurality of different colours, a power source (26) connected to the plurality of LEDs for supplying power thereto a plurality of capacitor units (7, 8, 9) connected to the power source to be provided thereby with charge for generating a respective one of a plurality of different respective forward bias voltages for application to the LEDs to operate the LED. A control unit (10) is operable to selectively connect a capacitor unit to an LED for applying a desired one of the different said forward bias voltages thereto according to the colour of light which the LED is operable to display.
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/20 (2020.01 - EP US); H05B 45/24 (2020.01 - EP); H05B 45/46 (2020.01 - EP US)
Citation (search report)
- [XI] WO 2009060400 A1 20090514 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- [I] WO 2009129830 A1 20091029 - POWER RES ELECTRONICS B V [NL], et al
- [A] US 2008116818 A1 20080522 - SHTEYNBERG ANATOLY [US], et al
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 13275158 A 20130705