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1. (WO2018160304) DISPLAYS WITH DIRECT-LIT BACKLIGHT UNITS
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Pub. No.: WO/2018/160304 International Application No.: PCT/US2018/015776
Publication Date: 07.09.2018 International Filing Date: 29.01.2018
IPC:
G02F 1/1335 (2006.01)
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
13
based on liquid crystals, e.g. single liquid crystal display cells
133
Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333
Constructional arrangements
1335
Structural association of optical devices, e.g. polarisers, reflectors, with the cell
Applicants:
APPLE INC. [US/US]; 1 Infinite Loop M/S 36-2PAT Cupertino, CA 95014, US
Inventors:
LIU, Rong; US
SUN, Yu, P.; US
HAFIDI, Abdeslam; US
ZWEIGLE, Erik, A.; US
QI, Jun; US
GU, Mingxia; US
YIN, Victor, H.; US
LI, Xiangtong; US
LI, Yanming; US
HUANG, Yi; US
HONG, Ziruo; US
Agent:
TREYS, G., Victor; US
Priority Data:
15/819,08521.11.2017US
62/466,49203.03.2017US
Title (EN) DISPLAYS WITH DIRECT-LIT BACKLIGHT UNITS
(FR) DISPOSITIFS D'AFFICHAGE À UNITÉS DE RÉTROÉCLAIRAGE À ÉCLAIRAGE DIRECT
Abstract:
(EN) An array of pixels in a display may be illuminated by a backlight having an array (36) of light-emitting diodes (38) in an array of respective cells. A reflector (68) is used to reflect light from the light-emitting diodes (38) through the array of pixels. Within the cells, the reflector (68) has cross-sectional profiles that help distribute light (80) emitted from the light-emitting diodes (38) toward edges of the cells. A light diffuser layer (34) for the backlight may have a partially reflective layer (96) such as a thin-film interference filter with an angularly dependent transmission. Within each cell, the reflector (68) may have cross-sectional profiles with portions that are parabolic or elliptical.
(FR) Un réseau de pixels dans un dispositif d'affichage peut être éclairé par un rétroéclairage ayant un réseau (36) de diodes électroluminescentes (38) dans un réseau de cellules respectives. Un réflecteur (68) est utilisé pour réfléchir la lumière provenant des diodes électroluminescentes (38) à travers le réseau de pixels. Dans les cellules, le réflecteur (68) présente des profils de section transversale qui aident à distribuer la lumière (80) émise par les diodes électroluminescentes (38) vers les bords des cellules. Une couche de diffuseur de lumière (34) pour le rétroéclairage peut avoir une couche partiellement réfléchissante (96) telle qu'un filtre d'interférence à film mince avec une transmission dépendant angulairement. Dans chaque cellule, le réflecteur (68) peut présenter des profils de section transversale avec des parties qui sont paraboliques ou elliptiques.
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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)