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1. WO2020033789 - SWITCHABLE LIGHT-COLLIMATING LAYER WITH REFLECTOR

Publication Number WO/2020/033789
Publication Date 13.02.2020
International Application No. PCT/US2019/045837
International Filing Date 09.08.2019
IPC
G PHYSICS
02
OPTICS
F
DEVICES 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
1
Devices 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
01
for the control of the intensity, phase, polarisation or colour
167
based on electrophoresis
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
30
Collimators
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21
LIGHTING
V
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
8
Use of light guides, e.g. fibre optic devices, in lighting devices or systems
[IPC code unknown for G02F 1/1677]
[IPC code unknown for ERROR IPC Code incorrect: invalid subgroup (0=>999999)!]
G02F 1/167 (2006.01)
G02B 27/30 (2006.01)
F21V 8/00 (2006.01)
G02F 1/1677 (2019.01)
G02F 1/13357 (2006.01)
CPC
G02B 27/30
G02F 1/13338
G02F 1/133504
G02F 1/133606
G09G 3/3406
Applicants
  • E INK CALIFORNIA, LLC [US/US]; 47485 Seabridge Drive Fremont, California 94538, US
Inventors
  • ZHENG, Xiaolong; US
  • GALWADUGE, Pubudu Thilanka; US
  • LIN, Craig; US
  • KANG, Yih-Ming; US
  • ZANG, HongMei; US
  • DU, Hui; US
Agents
  • BEAN, Brian D.; US
Priority Data
62/717,10410.08.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SWITCHABLE LIGHT-COLLIMATING LAYER WITH REFLECTOR
(FR) COUCHE DE COLLIMATION DE LUMIÈRE COMMUTABLE AVEC RÉFLECTEUR
Abstract
(EN)
A light-collimating film including elongated chambers of bistable electrophoretic fluids. The light-collimating films are suitable to control the amount and/or direction of light incident to a transmissive substrate. Such films may be integrated into devices, such as LCD displays, to provide a zone of privacy for a user viewing the LCD display. Because the light- collimating film is switchable, it allows a user to alter the collimation of the emitted light on demand. Because the films are bistable, they do not require additional power after they have been switched to a display state.
(FR)
L'invention concerne un film de collimation de lumière comprenant des chambres allongées de fluides électrophorétiques bistables. Les films de collimation de lumière sont appropriés pour commander la quantité et/ou la direction de la lumière incidente sur un substrat transmissif. De tels films peuvent être intégrés dans des dispositifs, tels que des écrans LCD, pour fournir une zone de confidentialité pour un utilisateur visualisant l'affichage LCD. Étant donné que le film de collimation de lumière est commutable, il permet à un utilisateur de modifier sur demande la collimation de la lumière émise. Étant donné que les films sont bistables, ils ne nécessitent pas d’alimentation supplémentaire une fois qu'ils ont été commutés à un état d'affichage.
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