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:
Apr. 07, 1998
Filed:
Mar. 26, 1996
Masaru Takeuchi, Handa, JP;
Yasuhito Bandai, Nagoya, JP;
Akira Kobayashi, Anjou, JP;
Katsutoshi Seguchi, Nishikamo-gun, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An optical guide device in an optical reading system incorporated in a facsimile device, copying machine, image scanner and the like includes an array of LEDs and a light guide plate. When the light guide plate is cut along the longitudinal axis to give a cross-section in which the thickness appears, the cross-section is in a tapered shape and the thickness of the light guide plate at the side confronting the light array increases toward the opposite side facing the document. The light emerging from the light guide plate is high and uniform in light intensity level, so that a CCD unit picks up the light reflected from the document with high accuracy.