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Patent Searching and Data


Title:
PROJECTION TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/132299
Kind Code:
A1
Abstract:
 A projection type display device that inhibits costs, has a compact structure, reduces the distance between the housing and screen, and exhibits excellent projection performance. A projection type display device (20) is provided with: an image display element (3) that displays an image on a conjugate plane on the reduction side; and a projection optical system (10) that magnifies and projects the image as a conjugate image on a screen that is a conjugate plane on the magnification side. A reflection optical system (2) has negative power and has the same optical axis (Z) as a refraction optical system (1). The center of the display surface of the image display element 3) is arranged so as to be eccentric from the optical axis (Z), and when the magnification-side conjugate position of the center of the display surface is disposed vertically upwards from the optical axis (Z), the point of intersection (13) between the lower beam of a light beam (11) that forms an image on the lower end center of the conjugate image and the upper beam of a light beam (12) that forms an image on the upper end center of the conjugate image is positioned more towards the reduction side than the apex of the lens surface of the refraction optical system (1) closest to the reflection optical system (2). The projection type display device satisfies a predetermined expression.

Inventors:
KAWANA, Masanao (1-324 Uetake-cho, Kita-ku, Saitama-sh, Saitama 13, 〒3310813, JP)
Application Number:
JP2012/001871
Publication Date:
October 04, 2012
Filing Date:
March 16, 2012
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
富士フイルム株式会社 (〒20 東京都港区西麻布2丁目26番30号 Tokyo, 〒1068620, JP)
International Classes:
G02B17/08; G03B21/14
Foreign References:
JP2006195433A
US20110002051A1
US20100315725A1
JP2010217887A
US20090323202A1
US20110292515A1
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (YANAGIDA & Associates, 7F Shin-Yokohama KS Bldg., 3-18-3, Shin-Yokohama, Kohoku-ku, Yokohama-sh, Kanagawa 33, 〒2220033, JP)
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Claims: