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1. WO2022090614 - OPTICAL ARRANGEMENT FOR PROVIDING PRIVACY

Publication Number WO/2022/090614
Publication Date 05.05.2022
International Application No. PCT/FI2021/050710
International Filing Date 25.10.2021
IPC
F21V 8/00 2006.1
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 2006.1
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
CPC
G02B 6/0023
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
0023provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
G02B 6/0036
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
0035provided on the surface of the light guide or in the bulk of it
00362-D arrangement of prisms, protrusions, indentations or roughened surfaces
G02B 6/0038
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
0035provided on the surface of the light guide or in the bulk of it
0038Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
G02F 1/13756
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
137characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
13756the liquid crystal selectively assuming a light-scattering state
Applicants
  • TEKNOLOGIAN TUTKIMUSKESKUS VTT OY [FI]/[FI]
Inventors
  • RUOTSALAINEN, Teemu
  • SNECK, Asko
  • MÄKELÄ, Tapio
Agents
  • BERGGREN OY
Priority Data
2020605526.10.2020FI
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL ARRANGEMENT FOR PROVIDING PRIVACY
(FR) AGENCEMENT OPTIQUE PERMETTANT DE GARANTIR LA CONFIDENTIALITÉ
Abstract
(EN) A masking device (500) disposed over a display (DISP1) has a first viewing region (ZONE1), a second viewing region (ZONE2), a first operating mode (MODE1), and a second operating mode (MODE2), wherein in the first operating mode (MODE1) the masking device (500) allows a first observer (EYE1) located in the first viewing region (ZONE1) to observe information (INF01 ) displayed on the display (DISP1 ), and also allows a second observer (EYE2) located in the second viewing region (ZONE2) to observe the displayed information (INF01), wherein in the second operating mode (MODE2) the masking device (500) projects light (B2a) to the second viewing region (ZONE2) so as to prevent the second observer (EYE2) from observing the displayed information (INF01).
(FR) Un dispositif de masquage (500) disposé sur une unité d'affichage (DISP1) présente une première région de visualisation (ZONE1), une seconde région de visualisation (ZONE2), un premier mode de fonctionnement (MODE1) et un second mode de fonctionnement (MODE2), dans le premier mode de fonctionnement (MODE1), le dispositif de masquage (500) permettant à un premier observateur (ŒIL1) situé dans la première région de visualisation (ZONE1) d'observer des informations (INF01) affichées sur l'unité d'affichage (DISP1) et permettant également à un second observateur (ŒIL2) situé dans la seconde région de visualisation (ZONE2) d'observer les informations affichées (INF01) dans le second mode de fonctionnement (MODE2), le dispositif de masquage (500) projetant de la lumière (B2a) vers la seconde région de visualisation (ZONE2) de manière à empêcher le second observateur (ŒIL2) d'observer les informations affichées (INF01).
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