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. 16, 2007
Filed:
Jul. 20, 2000
Yoshio Hagihara, Osaka, JP;
Yoshio Hagihara, Osaka, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
To reduce variations in output current of individual pixels resulting from variations in threshold voltage of the MOS transistor Tprovided in each pixel, the threshold voltage of the MOS transistor Tof each pixel is measured to acquire compensation data with which to correct the output current from the individual pixels. To acquire this compensation data, first, a MOS transistor Tis turned on to apply a direct-current voltage VRB to the gate of the MOS transistor T, and the MOS transistor Tis turned off to disconnect the gates of the MOS transistors Tand Tfrom each other. Next, in this state, by turning a signal φVPS first to a low voltage and then to a voltage close to a direct-current voltage VPD, a negative electric charge is accumulated in the MOS transistor T. A voltage resulting from this negative electric charge is applied to the gate of the MOS transistor T, and thus the MOS transistor Tis turned on, causing an output current to be fed to an output signal linein accordance with the voltage applied to the gate of the MOS transistor T