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1. DE102009027288 - Lichtleitplatte mit eingebetteten lichtstreuenden Störstellen und Verfahren zu dessen Herstellung

Office Germany
Application Number 102009027288
Application Date 29.06.2009
Publication Number 102009027288
Publication Date 30.12.2010
Publication Kind A1
IPC
F21V 8/00
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
G02F 1/13357
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
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
CPC
G02B 6/0051
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
005provided by one optical element, or plurality thereof, placed on the light output side of the light guide
0051Diffusing sheet or layer
B29C 39/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
39Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
B29C 48/08
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
07Flat, e.g. panels
08flexible, e.g. films
B29C 48/914
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
88Thermal treatment of the stream of extruded material, e.g. cooling
911Cooling
9135of flat articles, e.g. using specially adapted supporting means
914cooling drums
G02B 6/0055
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
005provided by one optical element, or plurality thereof, placed on the light output side of the light guide
0055Reflecting element, sheet or layer
G02B 6/0065
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
0065Manufacturing aspects; Material aspects
Applicants EVONIK ROEHM GMBH
Inventors SCHMIDT JANN
ROTH CHRISTIAN
Title
(DE) Lichtleitplatte mit eingebetteten lichtstreuenden Störstellen und Verfahren zu dessen Herstellung
Abstract
(DE)

Lichtleitplatten, die an ihren Kanten beleuchtet werden und die das an den Kanten eingespeiste Licht über mindestens eine der beiden senkrecht zu den Kanten stehenden Oberflächen wieder abgeben, die für die Hinterleuchtung von LCD-Bildschirmen sowie von Hinweis- und Reklameschildern geeignet sind, werden zur Verfügung gestellt. Damit das an der Kante eingespeiste Licht einer Lichtquelle die Lichtleitplatten durch Überwindung der Totalreflexion über eine der Oberflächen wieder verlassen kann, müssen die Lichtstrahlen in der Lichtleitplatte gezielt ausgelenkt werden. Die Lichtleitplatten sind an einer der beiden Oberflächen der Lichtleitplatte mit optischen Störstellen versehen, die durch eine Folie vor Beschädigung geschützt werden. Zusätzlich wird ein Verfahren zum vereinfachten Aufbringen dieser Störstellen zur Verfügung gestellt.