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:
Mar. 17, 2009
Filed:
Apr. 06, 2007
Tetsurou Nakamura, Hyogo, JP;
Hiroshi Shirouzu, Fukuoka, JP;
Takafumi Hamano, Fukuoka, JP;
Shinya Yamamoto, Fukuoka, JP;
Tetsurou Nakamura, Hyogo, JP;
Hiroshi Shirouzu, Fukuoka, JP;
Takafumi Hamano, Fukuoka, JP;
Shinya Yamamoto, Fukuoka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
To provide an exposure device and an image forming apparatus using the same, in which the exposure device can detect light intensity with improved reliability and thereby controls the light intensity with high precision, the exposure device includes an EL (electro-luminescence) element having a first electrode (an anode), a second electrode (a cathode), and a light emitting layer disposed between the first and second electrodes, thereby forming a light emitting unit, and a light detecting element detecting light emitted from the EL element, in which the EL element and the light detecting element are stacked onto each other. The light detecting element is provided at an inner side of a principal surface of the electrode (the anode) which is disposed closer to the light detecting element than the other electrode. A light emitting area of the EL element is provided at an inner side of a principal surface of the light detecting element.