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1. WO2012067376 - BACKLIGHT UNIT

Publication Number WO/2012/067376
Publication Date 24.05.2012
International Application No. PCT/KR2011/008534
International Filing Date 10.11.2011
IPC
G02F 1/13357 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
13357Illuminating devices
G02B 6/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
F21V 8/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
8Use of light guides, e.g. fibre optic devices, in lighting devices or systems
CPC
G02B 6/0021
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0013Means for improving the coupling-in of light from the light source into the light guide
0015provided on the surface of the light guide or in the bulk of it
002by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
0021for housing at least a part of the light source, e.g. by forming holes or recesses
G02B 6/0033
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
G02B 6/0068
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0066characterised by the light source being coupled to the light guide
0068Arrangements of plural sources, e.g. multi-colour light sources
G02B 6/0073
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0066characterised by the light source being coupled to the light guide
0073Light emitting diode [LED]
G02B 6/0083
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0081Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
0083Details of electrical connections of light sources to drivers, circuit boards, or the like
G02F 1/133603
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour 
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements; ; Manufacturing methods
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
1336Illuminating devices
133602Direct backlight
133603with LEDs
Applicants
  • LG INNOTEK CO., LTD. [KR]/[KR] (AllExceptUS)
  • AHN, Kyoung Soo [KR]/[KR] (UsOnly)
  • PARK, Sang Jun [KR]/[KR] (UsOnly)
  • JANG, Jae Hyuk [KR]/[KR] (UsOnly)
  • KIM, Jong Sun [KR]/[KR] (UsOnly)
  • LEE, Jeong Oh [KR]/[KR] (UsOnly)
  • PARK, Hyung Min [KR]/[KR] (UsOnly)
Inventors
  • AHN, Kyoung Soo
  • PARK, Sang Jun
  • JANG, Jae Hyuk
  • KIM, Jong Sun
  • LEE, Jeong Oh
  • PARK, Hyung Min
Agents
  • SEO, Kyo Jun
Priority Data
10-2010-011332915.11.2010KR
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BACKLIGHT UNIT
(FR) UNITÉ DE RÉTROÉCLAIRAGE
Abstract
(EN)
Disclosed is a backlight unit. The backlight unit includes a printed circuit board formed thereon with a plurality of LEDs and a light guide plate having receiving holes to receive the LEDs. At least one round part having a predetermined curvature is formed at an edge defined in an intersection between an upper surface and an inner surface of the receiving hole. Since the round part is formed at the edge in the receiving hole receiving the LED at the portion of the light guide plate, the light distribution is improved so that the light efficiency is increased.
(FR)
La présente invention a trait à une unité de rétroéclairage. L'unité de rétroéclairage inclut une carte de circuit imprimé, qui est formée sur celle-ci, avec une pluralité de diodes électroluminescentes et une plaque de guide d'ondes optique dotée de trous de réception permettant de recevoir les diodes électroluminescentes. Au moins une partie ronde qui est dotée d'une courbure prédéterminée est formée sur une arête qui est définie à l'intersection entre une surface supérieure et une surface intérieure du trou de réception. Dans la mesure où la partie ronde est formée sur l'arête dans le trou de réception qui reçoit la diode électroluminescente sur la partie de la plaque de guide d'ondes optique, la répartition lumineuse est améliorée de sorte que l'efficacité lumineuse est accrue.
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