The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 1989
Filed:
Apr. 20, 1988
Yoshikado Yamada, Kashihara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An image reading apparatus having a solid state pick-up device for receiving light reflected from an image that is irradiated by a light source supplied with AC power. The image reading apparatus includes a zero cross pulse generating circuit that is supplied by an AC supply voltage and a received light amount detection starting time setting device which sets the delay time for a specified period of time from the generation of a pulse by the zero cross pulse generating circuit relating to the time for the solid state pick-up device to start detecting the quantity of light received. The image reading apparatus synchronizes this timing to ensure that an image is irradiated with a constant quantity of light.