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:
Dec. 30, 1997
Filed:
Aug. 08, 1995
Toshihiro Saika, Zama, JP;
Hidemasa Mizutani, Sagamihara, JP;
Noriyuki Kaifu, Hachioji, JP;
Toshio Kameshima, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal device has a light source and liquid crystal elements which selectively transmit light emitted by the light source. The liquid crystal device comprises: the light source, being an electroluminescent device, having a transparent electrode disposed on a light output side of the light source, an electrode opposite to the transparent electrode, and an electroluminescence emission layer interposed between the transparent electrode and the opposite electrode; voltage supply means connected to the transparent electrode in order to feed a reference voltage to the transparent electrode; and driving voltage application means for applying a driving voltage to the opposite electrode. The driving voltage application means comprises a separate excitation type driving circuit using the capacitance of the electroluminescent device itself to produce an alternating current, and pulse generating means for generating a pulse responsive to an input signal to turn on and off a switch of the separate excitation type driving circuit. The pulse generating means includes a multivibrator and a capacitor and a resistor determine the width of the pulse.