Display device and system
AssigneeEnvisics Ltd
InventorsJamieson Christmas, Alexander Cole, Mate Karner
Life of this patent
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Abstract
A head-up display for a vehicle, the head-up display including a picture generating unit arranged to generate a picture on a light receiving surface; and an optical system arranged to image the picture, where the optical system includes an input arranged to receive light of the picture; an output arranged to output light forming an image of the picture; a first mirror and second mirror arranged to guide light from the input to the output along an optical path, where the optical path includes a first optical path from the input to the second mirror including a transmission through the first mirror; and second optical path from the second mirror to the output including a reflection off the first mirror.
Claims17
A head-up display for a vehicle, the head-up display comprising:
- a picture generating unit arranged to generate a picture on a light receiving surface, wherein the picture generating unit comprises:
- a light source arranged to emit light;
- a spatial light modulator arranged to receive the light from the light source and output spatially-modulated light in accordance with a computer-generated hologram represented on the spatial light modulator to form the picture on the light receiving surface;
- and
- a holographic processor arranged to output the computer-generated hologram to the spatial light modulator,
- wherein the head-up display further comprises:
- an optical system arranged to image the picture, wherein the optical system comprises:
- an input arranged to receive light of the picture;
- an output arranged to output light forming an image of the picture;
- a first mirror and a second mirror arranged to guide light from the input to the output along an optical path, wherein the optical path comprises:
- a first optical path from the input to the second mirror, wherein the first mirror comprises a polarisation-selective filter configured to reflect light polarised in a first direction and transmit light polarised in a second direction;
- and a second optical path from the second mirror to the output including a reflection of the light polarised in the first direction off the first mirror.
A method for providing a head-up display for a vehicle, the method comprising:
- generating a picture on a light receiving surface, the generating comprising:
- representing a computer-generated hologram on a spatial light modulator;
- receiving light from a light source on the spatial light modulator;
- outputting from the spatial light modulator spatially-modulated light in accordance with a computer-generated hologram;
- and
- receiving the spatially-modulated light on the light receiving surface to form the picture on the light receiving surface,
- wherein the method further comprises:
- imaging the picture using an optical system, wherein the imaging comprises:
- receiving light of the picture at an input of an optical system;
- and
- guiding light of the picture from the input to an output along an optical path, wherein the optical path comprises:
- a first optical path from the input to a second mirror including, wherein the first mirror comprises a polarisation-selective filter configured to reflect light polarised in a first direction and transmit light polarised in a second direction;
- and a second optical path from the second mirror to the output including a reflection of the light polarised in the first direction off the first mirror.
Dependencies are inferred from the claim text.