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:
Aug. 04, 2009
Filed:
Jun. 17, 2003
Masafumi Agari, Hyogo, JP;
Hidetada Tokioka, Hyogo, JP;
Ryuichi Hashido, Hyogo, JP;
Takahiro Urakabe, Hyogo, JP;
Suehiro Gotoh, Hyogo, JP;
Masashi Okabe, Hyogo, JP;
Mitsuo Inoue, Hyogo, JP;
Masafumi Agari, Hyogo, JP;
Hidetada Tokioka, Hyogo, JP;
Ryuichi Hashido, Hyogo, JP;
Takahiro Urakabe, Hyogo, JP;
Suehiro Gotoh, Hyogo, JP;
Masashi Okabe, Hyogo, JP;
Mitsuo Inoue, Hyogo, JP;
Mitsubishi Denki Kabuhsiki Kaisha, Tokyo, JP;
Abstract
Signal lines for supplying signal currents to respective pixel circuits having light emitting elements are arranged. A signal line driving circuit generates, on a signal line, a signal current corresponding to the image data, by switching bit weighting currents output from bit weighting current source circuits provided for respective bits of the image data, using a switch circuit turned on/off dependent on the corresponding bit. Each current source circuit has a function of correcting the level of the bit weighting current output from itself, based on a reference current of the bit weighting current supplied from a reference current line. Therefore, even when the characteristics of TFTs forming respective current source circuits vary widely, variation in signal currents among the signal lines can be suppressed, and unevenness in emission luminance can be suppressed.