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. 15, 2008
Filed:
Jun. 18, 2004
Yoshio Suzuki, Kanagawa, JP;
Yoshio Suzuki, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
In a display apparatus having organic EL devices to display images in units of pixels, each pixel comprises a first transistor to drive the relevant device; a current supply circuit for supplying, in a first mode, a current of a magnitude based on the value of the pixel displayed by the device; a second transistor whose control electrode is connected to the control electrode of the first transistor to thereby constitute a current mirror circuit, wherein the second transistor receives, in the first mode, the current from the current supply circuit; a capacitor connected to the control electrode of the second transistor and holding, in the first mode, the voltage generated in the control electrode of the second transistor when the current from the current supply circuit has been received; and a switch for connecting, in a second mode, the device to the first transistor in a state where the voltage generated in the control electrode of the second transistor and held in the capacitor is supplied to the control electrode of the first transistor. In this device, high-quality image display can be achieved at lower cost with a simplified structure.