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:
Feb. 27, 2001
Filed:
Jul. 02, 1998
Motonobu Ando, Iwakura, JP;
Brother Kogyo Kabushiki Kaisha, Aichi-ken, JP;
Abstract
The lamp is turned ON in S,, and the upper reference voltage memory,is written with the upper reference value, which is presently stored in the upper storage memory,and which has been determined and set as the upper reference value during the previously-executed image reading process. The increase mode flag is turned ON in S,, and the interrupt routine is started in S,to determine the upper reference voltage to be used in the present image reading process. When the upper reference value is finally determined, the interrupt routine is terminated in S,, and the upper reference value is stored in the upper reference voltage memory,. The upper reference value is stored also in the upper storage memory,in S,. In the next image reading process, the upper reference value, stored in the upper storage memory,, will be written into the upper reference value memory,in S,. The D/A converter,will initially output a temporary upper reference voltage corresponding to that upper reference value. The upper reference voltage proper for being used in the present image reading process can be determined within a short period of time through repeatedly changing the temporary upper reference voltage from the thus initially-set value.