Semiconductor Energy Laboratory Co., Ltd.

Yasuko Watanabe

Shunpei Yamazaki

Hajime Kimura

Yasuyuki Arai

Jun Koyama

Aya Anzai

Yoshitaka Moriya

Hiroko Abe

Yuji Iwaki

Keitaro Imai

Mikio Yukawa

Yu Yamazaki

Masato Yonezawa

Miyuki Higuchi

Mitsuaki Osame

Osamu Nakamura

Yuko Tachimura

Junichiro Sakata

Junya Maruyama

Ryoji Nomura

Hiromichi Godo

Hidekazu Takahashi

Takuya Tsurume

Kazutaka Inukai

Kaoru Tsuchiya

Ryosuke Watanabe

Yohei Kanno

Yumiko Noda

A transistor has variation in a threshold voltage or mobility due to accumulation of factors such as variation in a gate insulating film which is caused by a difference of a manufacturing process or a substrate to be used and variation in a crystal state of a channel formation region. The present invention provides an electric circuit which is arranged such that both electrodes of a capacitance device can hold a voltage between the gate and the source of a specific transistor. Further, the present invention provides an electric circuit which has a function capable of setting a potential difference between both electrodes of a capacitance device so as to be a threshold voltage of a specific transistor.

Electric circuit

The present invention provides a display device including a nonvolatile memory circuit to which data can be added without increasing the number of manufacturing steps, and an electronic appliance using the display device. A display device of the present invention has a memory circuit that includes a memory element with a simple structure in which an organic compound layer is interposed between a pair of conductive layers. According to the present invention having the above mentioned structure, a display device having a nonvolatile memory circuit to which data can be added can be provided without increasing the number of manufacturing steps.

Display device with semiconductor memory cell

An electronic device capable of transmitting and receiving a mail through an internet usually has from 12 to 20 operation keys inclusive of numerical keys and special keys. In order to input Japanese characters inclusive of 'kanji' and special characters as data, complex operations must be executed by changing over the input mode. A portable data terminal as represented by a cellular phone or an electronic device such as a data terminal as represented by a personal computer or a desk top telephone, has such a shape that the first center line of the first housing and the second center line of the second housing come into agreement and in parallel with each other only in a state where the first housing and the second housing are folded by the hinge.

Electronic devices

It is an object of the present invention to provide a display device preventing the external invasion of water and/or oxygen and preventing the deterioration of a luminous element due to these invading substances and to provide a production method including simple production steps for producing the display device. The invention provides a display device having a sealing material on the rim of an exposed interlayer insulator for preventing the invasion of water and/or oxygen from the interlayer insulator. Further, the invention provides a display device having a barrier body on an exposed interlayer insulator for preventing the invasion of water and/or oxygen from the interlayer insulator. Furthermore, the application of droplet discharge technique in production steps for producing the display device can eliminate a photolithography step such as exposing and developing. Thus, a method of producing a display device having an improved yield is provided.

Display device and method for manufacturing the same

The transistor suffers the variation caused in threshold voltage or mobility due to gathering of the factors of the variation in gate insulator film resulting from a difference in manufacture process or substrate used and of the variation in channel-region crystal state. The present invention provides an electric circuit having an arrangement such that both electrodes of a capacitance element can hold a gate-to-source voltage of a particular transistor. The invention provides an electric circuit having a function capable of setting a potential difference at between the both electrodes of the capacitance element by the use of a constant-current source.

Semiconductor device and electronic apparatus using the same

The present invention is to provide a semiconductor device in which the step can be simplified, the manufacturing cost can be suppressed, and the decrease in yield can be suppressed. A semiconductor device of the present invention includes an antenna, a storage element, and a transistor, wherein a conductive layer serving as an antenna is provided in the same layer as a conductive layer of the transistor or the storage element. This characteristic makes it possible to omit an independent step of forming the conductive layer serving as an antenna and to conduct the step of forming the conductive layer serving as an antenna at the same time as the step of forming a conductive layer of another element. Therefore, the manufacturing step can be simplified, the manufacturing cost can be suppressed, and the decrease in yield can be suppressed.

Memory device and semiconductor device

Display device comprising a self-luminous light emitter and a barrier body in direct contact with a sealing material

To prevent a point defect and a line defect in forming a light-emitting device, thereby improving the yield. A light-emitting element and a driver circuit of the light-emitting element, which are provided over different substrates, are electrically connected. That is, a light-emitting element and a driver circuit of the light-emitting element are formed over different substrates first, and then electrically connected. By providing a light-emitting element and a driver circuit of the light-emitting element over different substrates, the step of forming the light-emitting element and the step of forming the driver circuit of the light-emitting element can be performed separately. Therefore, degrees of freedom of each step can be increased, and the process can be flexibly changed. Further, steps (irregularities) on the surface for forming the light-emitting element can be reduced than in the conventional technique.

Light-emitting device and manufacturing method thereof

A display device and an electronic device in which more sophistication and a high added value are realized by obtaining a read function by incorporating an imaging device, and by using a panel with small volume can be provided. A display device and an electronic device according to the invention has a first display surface and a plurality of pixels arranged in matrix over one surface of a light transmitting substrate and a second display surface over the other surface of the substrate. The plurality of pixels are each provided with a transistor, an imaging device, and a light-emitting element which emits light to the first display surface and the second display surface. The light-emitting element has two functions of serving as a light source when information of a subject is read and displaying an image. Thus, a display device according to the invention has two functions of an image sensor function to read information of a subject by using an imaging device and a display function to display an image by using the imaging device and the light-emitting element.

Display device and electronic device

Growing community of inventors

Kanagawa, Japan

Yasuko Watanabe