Image reader for image processing apparatus

Details Image reader for image processing apparatus Image reader for image processing apparatus

1985-07-18

1987-02-24

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358294, H04N 314

Patent

active

046461558

ABSTRACT:
An image reader in which a plurality of light-sensitive cells arranged in an array in a line image sensor are divided into a predetermined number of blocks, and the blocks are sequentially selected to sequentially drive the light-sensitive cells in each of the blocks to produce image signals. Charging switches are provided for charging the light-sensitive cells via block selector switches. The charging switches are activated after a signal read time assigned to each light-sensitive cell has expired to thereby shorten the charging time necessary for the light-sensitive cell. The block selector switches are each actuated at a predetermined timing while the charging switches are activated, thereby preventing noise due to switching actions of the block selector switches from being introduced into image signals.

REFERENCES:
patent: 4424590 (1984-01-01), Ozawa
patent: 4556800 (1985-12-01), Ohta et al.
patent: 4565928 (1986-01-01), Yamamoto et al.

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