Sensing display apparatus of image pattern

38 Pages·2013·1.98 MB·English

United States Patent 1191 [11] Patent Number: 4,881,900
Matsuoka et al. ' [45] Date of Patent: Nov. 21, 1989
[54] SENSING DISPLAY APPARATUS 0F IMAGE Blind,” Proc. IEEE, vol. 58, #9, Sep. 1970, Salsbury et
al.
PA'ITERN I
“An Aid to the Blind: An Optical-to-Tactile Converter
[75] Inventors: Mikiharu Matsuoka, Tokyo; of Wide Images,” Ciolli et al., Inst. Naz. O?ice, (Italy)
Yasuhiro Yamada, Yokohama; vol. 34.
Yasuko Miyazaki, Sagamihara; “A Reading Eye for the Blind,” Brugler et al., Optical
Takashi Kauemoto, Machida; Spectra, Feb. 1971.
Hirohiko Katayama, Kawasaki; v “Proceedings of IFIP Congress 80”—Tokyo-—6—9 Oct.
Tamao Ikuta, Yokohama, all of Japan 1980, Melbourne, 14-17 Oct. 1980, pp. 951-954, North
Holland.
[73] Assignee: Canon Kabushiki Kaisha, Tokyo,
Publishing Co., Amsterdam N1; W. Schwewikhardt:
Japan
“A Computer Based Education System for the Blind”.
[21] App]. No.: 76,180 Wescon Technical Papers, vol. 17, San Francisco,
ll-14 Sep. 1973, pp. 1 and 2, Wescon, Los Angeles,
[22] Filed: Jul. 21, 1987 U.S.; R. D. Melen: “A One-Hand Optacon”.
[30] Foreign Application Priority Data Primary Examiner-Thomas H. Tarcza
Assistant Examiner-Jan J. Lobo .
Jul. 23, 1986 [JP] Japan .............................. .. 61-174052 Attorney, Agent, or Firm-—Fitzpatrick, Cella, Harper &
Aug. 4, 1986 [JP] Japan . . . . . . . . . . .. 61-183029 Scinto
Aug. 4, 1986 [JP] Japan . . . . . . . . . . .. 61-183077
[57] ABSTRACT
Aug. 4, 1986 [JP] Japan . . . . . . . . . . .. 61-183078
Nov. 20, 1986 [JP] Japan ......................... .. 61-179619[U] Selecting switches are provided near a converter for
converting an optical image into an electric signal,
[51] Int. cu ...................... .. G09B 21/00; G06K 9/00 thereby enabling the electric signal before or after it
[52] US. Cl. .................................. .. 434/113; 434/114; was stored to be effectively selected. A plurality of
382/1
convertors are provided and when an electric signal is
[58] Field of Search ................... .. 434/113, 114; 382/1
not output from one of the convertors, the other con
vertors can be used. The analog electric signal output
[56] ‘ References Cited
from the converter is binarized by a reference level
U.S. PATENT DOCUMENTS signal before it ?uctuates. An electric power consump
4,475,234 10/1984 Nishijima et a1. .................... .. 382/1 tion when the apparatus is not used is prevented by a
power controller arranged near a sensing display.
OTHER PUBLICATIONS ‘
“A Monolithic Image Sensor for a Reading Aid‘ for the 10 Claims, 23 Drawing Sheets
(ZOOM LENS)
(PERSONAL
COMPUTER)
404
(MAIN UNIT) 405 (TACTILE STIMULATOR)
US. Patent Nov. 21, 1989 Sheet 1 of 23 4,881,900
FIG. I
FIG. 2
PRIOR ART
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US. ,Patent Nov. 21, 1989 Sheet 3 0f 23 4,881,900
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US. Patent Nov. 21, 1989 Sheet 4 of 23
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US. Patent Nov. 21, 1989 ' Sheet 5 0f 23 4,881,900
FIG. 6
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PRIOR ART

US. Patent Nov. 21, 1989 Sheet 7 of 23 4,881,900
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US. Patent Nov. 21, 1989 Sheet 8 of 23 4,881,900
FIG. 70
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US. Patent Nov. 21, 1989 Sheet 9 0f 23_ 4,881,900
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