Title:
IMAGE READER
Document Type and Number:
Japanese Patent JP3151105
Kind Code:
B2
Abstract:
PURPOSE: To obtain an even image signal even if an image is read at high speed by using the CCD line sensor of a two-channel structure.
CONSTITUTION: This reader uses a CCD line sensor 2 where stored electric charge signals are successively read by two clock signals CK1 and CK2 which are in an opposite phase relation with each other. In this reader, an LPF 3 inputting a clock signal CK2 and an adder 4 adding the output signal of this LPF 3 and the electric change signals read from a CCD line sensor 2 by clock signals CK1 and CK2 are provided, and these addition signals are outputted as image signals. Because the level difference of the output signals of the CCD line sensor 2 is canceled by the clock signal synchronizing with these output signals, a high speed image reading can be performed with high accuracy without receiving the influence due to the difference of a channel characteristic.
Inventors:
Hiroyuki Moromoto
Application Number:
JP7428394A
Publication Date:
April 03, 2001
Filing Date:
March 18, 1994
Export Citation:
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
International Classes:
H04N1/028; G06T1/00; (IPC1-7): H04N1/028
Attorney, Agent or Firm:
Kawasakizaki Kenji (1 person outside)