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1. (WO2019002412) IMAGE-GENERATING UNIT AND HEAD-UP DISPLAY COMPRISING SUCH AN IMAGE-GENERATING UNIT
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Pub. No.: WO/2019/002412 International Application No.: PCT/EP2018/067327
Publication Date: 03.01.2019 International Filing Date: 27.06.2018
IPC:
G02B 27/28 (2006.01) ,G02B 27/01 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
28
for polarising
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
01
Head-up displays
Applicants:
VALEO COMFORT AND DRIVING ASSISTANCE [FR/FR]; 76 rue Auguste Perret - ZI Europarc 94046 Créteil CEDEX, FR
Inventors:
MERMILLOD, Pierre; FR
BASTO, Adrien; FR
Agent:
DELPLANQUE, Arnaud; FR
Priority Data:
175598228.06.2017FR
Title (EN) IMAGE-GENERATING UNIT AND HEAD-UP DISPLAY COMPRISING SUCH AN IMAGE-GENERATING UNIT
(FR) UNITÉ DE GÉNÉRATION D'IMAGE ET AFFICHEUR TÊTE HAUTE COMPRENANT UNE TELLE UNITÉ DE GÉNÉRATION D'IMAGE
Abstract:
(EN) The invention relates to an image-generating unit (10) comprising: - at least one source (11A, 11B, 11C) that emits a light beam (F, F', F'') intended to form an image, - a liquid-crystal cell (14) placed on the path of the light beam, and - a polarising element (15), placed on the path of the light beam downstream of said cell, the liquid-crystal cell being configured to modify an orientation of a polarisation of the light beam with respect to the polarising element, so as to make the optical power of the light beam downstream of said element vary. According to the invention, the liquid-crystal cell is inclined with respect to said light beam. The invention also relates to a head-up display (1) that includes such an image-generating unit.
(FR) L'invention concerne une unité de génération d'image (10) comprenant : - au moins une source (11A, 11B, 11C) émettant un faisceau lumineux (F, F', F'') destiné à former une image, - une cellule à cristaux liquides (14) disposée sur le trajet du faisceau lumineux, et - un élément polarisant (15), disposé sur le trajet du faisceau lumineux en aval de ladite cellule, la cellule à cristaux liquides étant configurée pour modifier une orientation d'une polarisation du faisceau lumineux par rapport à l'élément polarisant, de manière à faire varier la puissance optique du faisceau lumineux en aval dudit élément. Selon l'invention, la cellule à cristaux liquides est inclinée par rapport audit faisceau lumineux. L'invention concerne aussi un afficheur tête-haute (1) qui comporte une telle unité de génération d'image.
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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: French (FR)
Filing Language: French (FR)