Image reading device

Abstract

The present invention relates to an image reading device equipped with a light source drive means for executing reciprocating translation action of movable body carrying light source for irradiating the reading object; a reading means scanning and reading image by exposal of the reading object via the light source drive means; a storing means capable of storing a plurality of drive zero times of the light source drive means when the means action starts; a time detection means for detecting used time after the light source carried on the movable body lights; a time control means starting to drive the light source drive means when the time detected by the time control means is detected to be in accordance with the time stored in the storing means. The image reading device may variably control moving action time of a vehicle frame according to reading ratio and deflection during light volume variation of the light source, and provide time desired for once scanning of not causing image quality deterioration and shortening image reading action.

Description

technical field [0001] The present invention relates to an image reading device capable of shortening the time from when a user presses a scan start switch on an operation portion to when scanning an object to be read is started during a scanning operation, thereby shortening the operation time per scan. Background technique [0002] In a conventional image reading device, an object such as a document is irradiated with light from a light source, the reflected light is photoelectrically converted by a photoelectric conversion element, and image information of the document is read using an output signal obtained from the photoelectric conversion element. refer to Figure 14 The overall configuration of such an image reading device will be described. [0003] It consists of a platen glass 1401 on which the original is placed, a reading window 1402 for sheet passage, a reference white plate 1403 for white level adjustment (gain adjustment) or shading correction data generation,...

AI Technical Summary

Problems solved by technology

[0010] However, in the above invention, during the initial operation of the continuous reading operation, an appropriate carriage moving distance is calculated according to the reading magnification, and in the second and When reading in the future, the start position of the carriage movement can be controlled variably, and the effect cannot be obtained when the first operation is performed, or when only one scan is performed.

In addition, before the light intensity of the light source is stabilized, the carriage is made to stand by, and the carriage is moved after the light intensity is stabilized, and the time required for each scanning operation becomes longer.

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