[54] MULTIPROJECTION APPARATUS
[75] Inventors: Akio Nakashima, Yokohama; Junichi Ikoma, Yoksuka; Yasutoshi Nakashima, Toyokawa; Sadayuki Nishimura, Minokamo; Yoshihisa Hosoe, Kakamigahara; Tatsumi Hasebe, Kamo; Akira Okamoto, Minokamo, all of Japan
[73] Assignees: Hitachi, Ltd., Tokyo; Hitachi Video & Information System, Inc., Kanagawa, both of Japan
[21] Appl. No.: 857,253
[22] Filed: Mar. 25,1992
[30] Foreign Application Priority Data
Oct. 1, 1990 [JP] Japan 3-260573
Apr. 19, 1991 [JP] Japan 3-113889
[51] Int. CI.' G03B 21/56
[52] U.S. CI 359/457; 359/443
[58] Field of Search 359/443, 450, 457, 460,
359/591, 592, 449
[56] References Cited
U.S. PATENT DOCUMENTS
4,668,046 5/1987 Yatabe et al 359/443
4,695,135 9/1987 Den Exter Blokland et
al 350/452
4,895,429 1/1990 Iwahara et al 350/124
There is provided the construction of a multiprojection apparatus composed of a plurality of projection units arranged in the vertical and horizontal directions, in which a transparent holding strip having an H-shaped cross section is inserted between screens each composed of a lenticular sheet and a Fresnel lens, and the right and left ends of a multiscreen are supported by elastic support members, or in which a receive member for receiving the screen in the direction of the optical axis and a screen holding device are provided, the receive member has such a shape as not to block projection light corresponding to an image on the screen and is located near a joint of the screen and another screen, and the holding device is disposed on a black stripe of the lenticular sheet and always pulled by an elastic member toward the receive member. Therefore, according to the present invention, it is possible to restrict the missing of information due to joints of the screens.
6 Claims, 4 Drawing Sheets
