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1. EP3021162 - Projection display apparatus

Office
European Patent Office
Application Number 15150652
Application Date 09.01.2015
Publication Number 3021162
Publication Date 18.05.2016
Publication Kind B1
IPC
G02F 1/13357
GPHYSICS
02OPTICS
FDEVICES 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
1Devices 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
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
13357Illuminating devices
CPC
G02B 6/0036
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
0035provided on the surface of the light guide or in the bulk of it
00362-D arrangement of prisms, protrusions, indentations or roughened surfaces
G02B 6/0038
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
0035provided on the surface of the light guide or in the bulk of it
0038Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
G02B 6/0056
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
0056for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
G02B 5/30
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
G02B 2027/012
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
01Head-up displays
0101characterised by optical features
0118comprising devices for improving the contrast of the display / brillance control visibility
012comprising devices for attenuating parasitic image effects
G02B 27/0172
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
01Head-up displays
017Head mounted
0172characterised by optical features
Applicants HIMAX DISPLAY INC
Inventors CHEN KUAN-YU
LI YUET WING
Designated States
Priority Data 14537982 11.11.2014 US
Title
(DE) Projektionsanzeigevorrichtung
(EN) Projection display apparatus
(FR) Appareil d'affichage de projection
Abstract
(EN) A projection display apparatus includes a light source (112) configured to emit a first light, a reflective light modulator (104) configured to modulate the first light to form a second light conveying a rendered image, a polarizer (108) and a light guide plate (106). The light guide plate can include a plurality of optical elements (146) embedded in the thickness of the light guide plate or provided on an outer surface of the light guide plate. An illuminating light entering the light guide plate can be redirected toward the light modulator by reflection at the grooves or optical elements. Moreover, an image light from the light modulator can travel through the light guide plate to the polarizer.