Invention Grant
- Patent Title: Projection display with multi-channel optics with non-circular overall aperture
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Application No.: US14535552Application Date: 2014-11-07
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Publication No.: US09800850B2Publication Date: 2017-10-24
- Inventor: Peter Schreiber , Marcel Sieler
- Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Applicant Address: DE Munich
- Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- Current Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- Current Assignee Address: DE Munich
- Agency: Keating & Bennett, LLP
- Priority: DE102012207621 20120508
- Main IPC: H04N9/31
- IPC: H04N9/31 ; G03B21/14 ; G02B3/00

Abstract:
A projection display is provided with an imager that is implemented to generate individual images in a distribution of sub-areas of an imaging plane of the imager. The projection display also includes a multi-channel optics, which is configured to map one allocated sub-area of the imager each per channel, such that the mappings of the individual images are combined to an overall image in a projection area. At least some channels of the multi-channel optics are arranged along at least one curve which is similar to at least one elongated image feature of the overall image, so that a two-dimension anisotropic out-of-focus behavior of each projected image point is obtained. In this way, a large depth of focus range can be combined with relatively high projection brightness without having to accept losses with respect to the focused illustration of image features that are to be projected with sufficient focus.
Public/Granted literature
- US20150062446A1 PROJECTION DISPLAY WITH MULTI-CHANNEL OPTICS WITH NON-CIRCULAR OVERALL APERTURE Public/Granted day:2015-03-05
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