Invention Grant
- Patent Title: Virtual image display device
- Patent Title (中): 虚拟图像显示设备
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Application No.: US13361249Application Date: 2012-01-30
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Publication No.: US08587869B2Publication Date: 2013-11-19
- Inventor: Takahiro Totani , Masayuki Takagi , Toshiaki Miyao , Akira Komatsu , Takashi Takeda
- Applicant: Takahiro Totani , Masayuki Takagi , Toshiaki Miyao , Akira Komatsu , Takashi Takeda
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2011-022443 20110204
- Main IPC: G02B27/14
- IPC: G02B27/14

Abstract:
A half mirror layer has an angle dependency in which when an angle of incidence becomes larger than the angle of incidence range of image light, reflectance increases, such that it is possible to prevent unintended light, which is emitted to a light transmitting member from a light guiding member and is reflected inside a light transmitting member, from being returned to a light emission portion of the light guiding member after passing through the half mirror layer as a reflective film at a relatively large angle of incidence. Therefore, it is possible to prevent the image light passed through the light transmitting member from becoming ghost light while mitigating the demand for increasing processing accuracy of the light transmitting member, and bonding accuracy between the light guiding member and the light transmitting member.
Public/Granted literature
- US20120200937A1 VIRTUAL IMAGE DISPLAY DEVICE Public/Granted day:2012-08-09
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