Image scanner having system extending function and image correct

Details Image scanner having system extending function and image correct Image scanner having system extending function and image correct

1995-05-23

1997-09-30

Vu, Kim

Facsimile and static presentation processing

Facsimile

Picture signal generator

358468, 358497, 395113, 395114, H04N 104, H04N 132, G06F 1700, G06F 1500

Patent

active

056731248

ABSTRACT:
In an image scanner having a flat bed type structure and an automatic document feeding type structure, the scanner includes: an image read unit at least including a lamp, a mirror and CCD sensors to read a manuscript which is put on the structure; an image control unit operatively connected to the image read unit to process an image read by the image read unit; a host computer operatively connected to the image control means; and the image control unit including a main printed-circuit board provided for the original functions of the image scanner, a main connector connecting the image control means to the host computer, a user printed-circuit board selectively provided by a user as an extended slot and the board being mounted within the image control unit, and a user connector connecting the main printed-circuit board to the user printed-circuit board. Further, the image scanner has a function of correction for a difference in an image output between the FB type and the ADF type by adjusting a change rate from the white/black reference level, the gain of the amplifier, the lamp current, or a predetermined conversion formula.

REFERENCES:
patent: 4794460 (1988-12-01), Shiota
patent: 5146351 (1992-09-01), Maehara
patent: 5206501 (1993-04-01), Sakakibara et al.
patent: 5214520 (1993-05-01), Miyazawa
patent: 5274567 (1993-12-01), Kallin et al.
patent: 5293257 (1994-03-01), Masao
EP-A-0,291,042 A3 (Mita Industrial) abstract; figure 1; Document Scanning Machine; Nov. 17, 1988.
Patent Abstracts of Japan, vol. 18, No. 278 (P-1743), May 26, 1994 & JP-A-06 044351, Feb. 18, 1994.

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