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:
Jan. 24, 1995
Filed:
Aug. 25, 1992
Toshihiro Saika, Zama, JP;
Hidemasa Mizutani, Sagamihara, JP;
Noriyuki Kaifu, Hachioji, JP;
Toshio Kameshima, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electroluminescent device comprising a first electrode, a second electrode and an electroluminescence emission zone, the electroluminescence emission zone being made of a first electroluminescence emission layer, a second electroluminescence emission layer, and a transparent electrode which is interposed between the first electroluminescence emission layer and the second electroluminescence emission layer. At least either the first electrode or the second electrode is a transparent electrode. The first electroluminescence emission layer and the second electro luminescence emission layer emit light by applying a driving voltage to the transparent electrode with both the first electrode and the second electrode connected to a power supply for a reference voltage. In an image sensor using such an electroluminescent device as a light source, the electric field produced by the driving signal of the electroluminescent device does not escape outward, presenting no interfering noise to the image sensor. The resulting light quantity is almost double that of devices with only a single electroluminescent layer, substantially enhancing a resulting image. As a result, a high S/N ratio image sensor may be fabricated.