US 2015/0177520 A1Published application

Virtual image display apparatus

AssigneeSeiko Epson Corporation

InventorsNoriaki HIRAIDE, Masayuki TAKAGI

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Abstract

In relation to a fourth surface as a partially covered optical surface from among a plurality of optical surfaces which configure a light guiding member in a light guiding device, such as a first surface, an intermediate image is formed at a location separated from the partially covered optical surface (fourth surface). With such a configuration, it is possible to reduce the influence of dirt, contamination, or the like on an image even if the dirt, the contamination, or the like are generated on the partially covered optical surface (fourth surface), from which it is difficult or impossible to remove the dirt, the contamination, or the like, and to display an image with a wide image angle by a configuration forming an intermediate image.

Claims13

Dependent claims

A virtual image display apparatus comprising:

a video image element which forms video image light;
a light guiding member which has a plurality of optical surfaces, guides video image light from the video image element by reflecting the video image light by an internal surface, and forms an intermediate image;
and
a coupling member which is arranged between the video image element and the light guiding member, is coupled to the light guiding member, and partially covers the light guiding member,
wherein the light guiding member includes, in the plurality of optical surfaces, a partially covered optical surface from a first region which is covered with the coupling member to a second region which is not covered with the coupling member, and the intermediate image is formed at a location separated from the partially covered optical surface.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/561,631Filed 5 Dec 2014
Priority: JP 2013-26661825 Dec 2013
Published: 25 Jun 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G02B 27/0172
Head mounted: characterised by optical features
G02B 27/0006
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00: with means to keep optical surfaces clean,…
G02B 27/0176
Head mounted: characterised by mechanical features
G02B 2027/012
Comprising devices for improving the contrast of the display / brillance control visibility: comprising devices for attenuating parasitic image…

Family

US 10,502,957 B2Related patent
US 2015/0177520 A1This patent

From the US filing history. Foreign family members aren’t listed.

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