Mitsubishi Denki Kabuhsiki Kaisha

Suehiro Gotoh

Masafumi Agari

Takahiro Urakabe

Hidetada Tokioka

Mitsuo Inoue

Masashi Okabe

Ryuichi Hashido

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.

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Hyogo, Japan

Suehiro Gotoh