Semiconductor Energy Laboratory Co., Ltd.

Mizuki Sato

Yasuyuki Takahashi

Mitsuaki Osame

Tomoyuki Iwabuchi

Shunpei Yamazaki

Kei Takahashi

Aya Anzai

Yasunori Yoshida

Ryota Fukumoto

Akihiro Kimura

Ryo Nozawa

An object is to provide a display device with a high aperture ratio or a semiconductor device in which the area of an element is large. A channel formation region of a TFT with a multi-gate structure is provided under a wiring that is provided between adjacent pixel electrodes (or electrodes of an element). In addition, a channel width direction of each of a plurality of channel formation regions is parallel to a longitudinal direction of the pixel electrode. In addition, when a channel width is longer than a channel length, the area of the channel formation region can be increased.

Display device and semiconductor device

A display device in which light leakage in a monitor element portion is prevented without increasing the number of steps and cost is provided. The display device includes a monitor element for suppressing influence on a light-emitting element due to temperature change and change over time and a TFT for driving the monitor element, in which the TFT for driving the monitor element is provided so as not to overlap the monitor element. Furthermore, the display device includes a first light shielding film and a second light shielding film, in which the first light shielding film is provided so as to overlap a first electrode of the monitor element and the second light shielding film is electrically connect to the first light shielding film through a contact hole formed in an interlayer insulating film. The contact hole is formed so as to surround the outer edge of the first electrode of the monitor element.

Display device and manufacturing method thereof

When a time grayscale method is used, it is an object to provide a display device in which the number of signal writings into a pixel can be reduced by dividing one frame period by the number of bits and power consumption can be reduced, and grayscale can be expressed. Further a smaller electronic device that performs display by a time grayscale method can be obtained. Grayscale can be expressed by dividing one frame period into subframe periods without storing signals by grayscale expression by a time grayscale method. Thus, power consumption can be reduced and downsizing of an electronic device can be achieved.

Display device having a plurality of driving transistors and a light emitting element and method for driving the same

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Kanagawa, Japan

Mizuki Sato