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1. WO2022026536 - BACKLIGHT FOR SWITCHABLE DIRECTIONAL DISPLAY

Publication Number WO/2022/026536
Publication Date 03.02.2022
International Application No. PCT/US2021/043435
International Filing Date 28.07.2021
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
H01L 51/52 2006.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
51Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
50specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
52Details of devices
G02B 5/18 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
18Diffracting gratings
CPC
B60K 2370/1523
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
2370Details of arrangements or adaptations of instruments specially adapted for vehicles, not covered by groups B60K35/00, B60K37/00
15Output devices or features thereof
152Displays
1523Matrix displays
B60K 2370/25
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
2370Details of arrangements or adaptations of instruments specially adapted for vehicles, not covered by groups B60K35/00, B60K37/00
20Optical features of instruments
25using filters
B60K 2370/336
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
2370Details of arrangements or adaptations of instruments specially adapted for vehicles, not covered by groups B60K35/00, B60K37/00
20Optical features of instruments
33Illumination features
336Light guides
B60K 2370/343
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
2370Details of arrangements or adaptations of instruments specially adapted for vehicles, not covered by groups B60K35/00, B60K37/00
20Optical features of instruments
33Illumination features
343Illumination of matrix displays
B60K 2370/347
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
2370Details of arrangements or adaptations of instruments specially adapted for vehicles, not covered by groups B60K35/00, B60K37/00
20Optical features of instruments
33Illumination features
347Optical elements for superposition of display information
B60K 35/00
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
35Arrangement of adaptations of instruments
Applicants
  • REALD SPARK, LLC [US]/[US]
Inventors
  • ROBINSON, Michael G.
  • WOODGATE, Graham J.
  • HARROLD, Jonathan
Agents
  • LOWRY, Penny L.
Priority Data
63/058,30829.07.2020US
63/112,82112.11.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) BACKLIGHT FOR SWITCHABLE DIRECTIONAL DISPLAY
(FR) RÉTROÉCLAIRAGE POUR AFFICHAGE DIRECTIONNEL COMMUTABLE
Abstract
(EN) A switchable backlight for a switchable privacy display apparatus comprises a collimated waveguide and an optical turning film comprising first and second arrays of elongate prismatic elements. High image luminance and image visibility is provided for off-axis viewers in a public mode of operation while in a privacy mode of operation visual security level above a perceived privacy threshold may be achieved for off-axis snoopers.
(FR) Un rétroéclairage commutable pour un appareil d'affichage de confidentialité commutable comprend un guide d'ondes collimaté et un film de retournement optique comprenant des premier et second réseaux d'éléments prismatiques allongés. Une luminance d'image élevée et une visibilité d'image élevée sont conférées pour des spectateurs hors axe dans un mode de fonctionnement public, tandis que dans un mode de fonctionnement privé, un niveau de sécurité visuelle au-dessus d'un seuil de confidentialité perçu peut être obtenu pour des observateurs hors axe.
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