EP 2175436 A1 20100414 - Dot matrix and segmented displays with uniform illumination
Title (en)
Dot matrix and segmented displays with uniform illumination
Title (de)
Punktmatrix- und segmentierte Anzeigen mit gleichmäßiger Beleuchtung
Title (fr)
Matrice de point et affichages segmentés avec un éclairage uniforme
Publication
Application
Priority
EP 08017601 A 20081008
Abstract (en)
This invention relates to white and coloured dot-matrix and segmented displays in which the colour is produced by means of blue or ultra-violet light-emitting diodes (LED) together with a wavelength conversion phosphor, or combination of phosphors. A white or coloured dot-matrix display is produced by conversion of blue or Ultra-Violet light from an array of light-emitting diodes (LEDs) 1 by means of a layer of phosphor 5 applied to a substrate 4 so as to provide uniform illumination over the areas 8 . In comparison to the previous art the invention improves the uniformity and consistency of illumination over the illuminated areas of the display and also improves reliability by distancing the phosphor layer 5 from the dissipation generated by the LEDs 1 .
IPC 8 full level
G09F 9/33 (2006.01)
CPC (source: EP)
G09F 9/3023 (2013.01); G09F 9/33 (2013.01)
Citation (applicant)
- US 4713579 A 19871215 - MASANOBU MIURA [JP]
- US 4914731 A 19900403 - CHEN SHEN-YUAN [TW]
- EP 1566848 A2 20050824 - LUMILEDS LIGHTING LLC [US]
- US 2005184638 A1 20050825 - MUELLER GERD O [US], et al
- EP 1667091 A2 20060607 - HO WAI [HK]
- US 2005006659 A1 20050113 - NG KEE YEAN [US], et al
- US 6165631 A 20001226 - BOERNER HERBERT [DE], et al
- US 2008060236 A1 20080313 - CHIANG JOHN [US], et al
Citation (search report)
- [X] US 6165631 A 20001226 - BOERNER HERBERT [DE], et al
- [X] US 2008060236 A1 20080313 - CHIANG JOHN [US], et al
- [X] US 2008116468 A1 20080522 - RADKOV EMIL VERGILOV [US], et al
- [X] US 2006111981 A1 20060525 - HUNTER CHARLES E [US], et al
- [X] WO 2008082136 A1 20080710 - SEOUL SEMICONDUCTOR CO LTD [KR], et al
- [X] US 2005174770 A1 20050811 - RATCLIFFE WILLIAM R [US]
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 MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08017601 A 20081008