Global Patent Index - EP 1794631 A1

EP 1794631 A1 20070613 - ILLUMINATED LIGHT BOX WITH LIGHT-EMITTING DIODES

Title (en)

ILLUMINATED LIGHT BOX WITH LIGHT-EMITTING DIODES

Title (de)

BELEUCHTETER LEUCHTKASTEN MIT LEUCHTDIODEN

Title (fr)

BOITE A LUMIERE A DIODES ELECTROLUMINESCENTES

Publication

EP 1794631 A1 20070613 (FR)

Application

EP 05794596 A 20050906

Priority

  • EP 2005054378 W 20050906
  • FR 0410270 A 20040928

Abstract (en)

[origin: WO2006034943A1] The invention concerns an illuminated light box designed in particular for backlighting liquid crystal displays, the box comprising: a light guide (62) in the form of a thin plate having two opposite main faces (64, 66) and at least two edges (B1, B4), the guide having on one of its faces a light-diffusing optical structure (70); light-emitting diodes (Lnm) arranged linearly along at least one of the edges of the light guide, the light emitted by the light-emitting diodes, illuminating the guide through the edge, being diffused through the face of the guide comprising the optical structure. The light-emitting diodes arranged along each of the edges of the guide are organized into at least two rows (Rb1 to Rb8) such that one light-emitting diode (Lnm) of a row powered by an electric power source (S1 to S8) is immediately followed by a light-emitting diode (L(n+1)m) of the other row powered by another electric power source.

IPC 8 full level

G02B 6/00 (2006.01)

CPC (source: EP US)

G02F 1/133603 (2013.01 - EP US); H05B 45/20 (2020.01 - US); H05B 45/22 (2020.01 - US); H05B 45/32 (2020.01 - EP)

Citation (search report)

See references of WO 2006034943A1

Citation (examination)

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 LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

FR 2875993 A1 20060331; FR 2875993 B1 20061208; BR PI0516198 A 20080826; CA 2581593 A1 20060406; CA 2581593 C 20140708; EP 1794631 A1 20070613; RU 2007116159 A 20081110; RU 2416811 C2 20110420; US 2008062116 A1 20080313; US 8215818 B2 20120710; WO 2006034943 A1 20060406

DOCDB simple family (application)

FR 0410270 A 20040928; BR PI0516198 A 20050906; CA 2581593 A 20050906; EP 05794596 A 20050906; EP 2005054378 W 20050906; RU 2007116159 A 20050906; US 57623707 A 20070328