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1. (WO2019067846) OPTICAL STACK FOR DIRECTIONAL BACKLIGHTS
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Pub. No.: WO/2019/067846 International Application No.: PCT/US2018/053328
Publication Date: 04.04.2019 International Filing Date: 28.09.2018
IPC:
G02B 6/10 (2006.01) ,F21S 2/00 (2016.01) ,F21V 8/00 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
10
of the optical waveguide type
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21
LIGHTING
S
NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF
2
Systems of lighting devices, not provided for in main groups F21S4/-F21S10/119
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
Applicants:
REALD SPARK, LLC [US/US]; Suite 200 100 N. Crescent Drive Beverly Hills, California 90210, US
Inventors:
IHAS, Benjamin; US
RAMSEY, Robert A.; US
WOODGATE, Graham J.; US
HARROLD, Jonathan; US
Agent:
LOWRY, Penny L.; US
MOTHEW, Neil G. J.; US
Priority Data:
62/565,83629.09.2017US
62/565,97329.09.2017US
62/582,05206.11.2017US
62/592,08529.11.2017US
62/634,16822.02.2018US
62/641,65712.03.2018US
62/673,35918.05.2018US
62/699,91418.07.2018US
Title (EN) OPTICAL STACK FOR DIRECTIONAL BACKLIGHTS
(FR) EMPILEMENT OPTIQUE DESTINÉ À DES RÉTROÉCLAIRAGES DIRECTIONNELS
Abstract:
(EN) A directional backlight apparatus includes a directional waveguide and a light source array, for providing large area directed illumination from localized light sources. Interfaces are provided between the directional waveguide and optical components adjacent the directional waveguide such that the coefficient of friction at the waveguide interfaces is greater than the coefficient of friction at least one outer interface on each side of the waveguide in the stack. Damage from compressive forces on the optical stack may be reduced, achieving improved optical performance and lifetime. Privacy display, low stray light display and autostereoscopic display may be provided with high uniformity, long lifetime and reduced cost mechanical components.
(FR) La présente invention concerne un appareil de rétroéclairage directionnel comprenant un guide d’ondes directionnel et un réseau de sources de lumière permettant de fournir un éclairage dirigé sur une grande surface à partir de sources de lumière localisées. Des interfaces sont prévues entre le guide d'ondes directionnel et des composants optiques adjacents au guide d'ondes directionnel de sorte que le coefficient de frottement au niveau des interfaces de guide d'ondes soit supérieur au coefficient de frottement d'au moins une interface externe sur chaque côté du guide d'ondes dans l'empilement. Les dommages causés par les forces de compression sur l'empilement optique peuvent être réduits, ce qui permet d'obtenir de meilleures performances optiques et une meilleure durée de vie. Un affichage de confidentialité, un affichage à faible lumière parasite et un affichage autostéréoscopique peuvent être fournis avec une uniformité élevée, une longue durée de vie et des composants mécaniques à coût réduit.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)