Semiconductor Energy Laboratory Co., Ltd.

Tdk Corporation

Masaaki Hiroki

Shunpei Yamazaki

Akira Mase

Yasuhiko Takemura

Koichiro Tanaka

Hideaki Kuwabara

Akio Endo

Mai Akiba

Takeshi Fukunaga

Hisashi Ohtani

Aiko Shiga

Daisuke Furumatsu

Minoru Takahashi

Masakazu Murakami

Hongyong Zhang

Kei Takahashi

Junpei Momo

Kunitaka Yamamoto

Ryota Tajima

Hideki Uochi

Jun Koyama

Toshimitsu Konuma

Akihisa Shimomura

Shigeru Onoya

Shinya Okano

Satoshi Seo

Mitsunori Sakama

Kenji Kasahara

Takeshi Fukada

Yumiko Yoneda

Haruki Katagiri

Masaki Yamakaji

Eiji Sato

Shunepi Yamazaki

Hideki Nemoto

Yutaka Shionoiri

Michio Arai

Yasuo Nakamura

Yukio Yamauchi

Masaaki Ikeda

Naoya Sakamoto

Noriko Ishimaru

Kazushi Sugiura

Mitsufumi Kodama

Nobuo Furukawa

Ichirou Takayama

Kengo Akimoto

Mitsuaki Osame

Satoshi Teramoto

Hisao Ikeda

Takeshi Nishi

Satoshi Murakami

Hiroshi Shibata

Munehiro Azami

Shou Nagao

Mutsuo Yamamoto

Yusuke Yoshitani

Noboru Inoue

Hiroyuki Miyake

Yoshiharu Hirakata

Yuugo Goto

Tomoaki Atsumi

Kaoru Hatano

Ikuko Kawamata

Takuya Miwa

Takashi Inushima

Noriko Shibata

Seiko Inoue

Junya Goto

Roh Yamamoto

Toshiharu Yamaguchi

Takehisa Sato

Vaitkus Rimantas

Noriaki Kogushi

To provide a secondary battery that is suitable to a portable information terminal or a wearable device. To provide an electronic device having a novel structure that can have various forms and a secondary battery that fits the forms of the electronic device. The secondary battery includes a film provided with depressions or projections that can ease stress on the film due to application of external force. The sizes of the depressions or projections are different between a center portion and an end portion of the film. The end portion of the film is sealed with an adhesive layer. The depressions or projections of the film are formed by pressing such as embossing.

Secondary battery and electronic device

A highly portable and highly browsable light-emitting device is provided. A light-emitting device that is less likely to be broken is provided. The light-emitting device has a strip-like region having high flexibility and a strip-like region having low flexibility that are arranged alternately. In the region having high flexibility, a light-emitting panel and a plurality of spacers overlap with each other. In the region having low flexibility, the light-emitting panel and a support overlap with each other. When the region having high flexibility is bent, the angle between normals of facing planes of the two adjacent spacers changes according to the bending of the light-emitting panel; thus, a neutral plane can be formed in the light-emitting panel or in the vicinity of the light-emitting panel.

Light-emitting device with circular polarizing plate over bonding layer

A sturdy electronic device is provided. A reliable electronic device is provided. A novel electronic device is provided. An electronic device includes a first board, a second board, a display portion having flexibility, and a power storage device having flexibility. The first board and the second board face each other. The display portion and the power storage device are provided between the first board and the second board. The display portion includes a first surface facing the power storage device. The first surface includes a first region not fixed to the power storage device. The first region overlaps with a display region of the display portion.

Electronic device

An electronic device of a novel embodiment, specifically an arm-worn electronic device used while being worn on an arm, is provided. An arm-worn secondary battery used while being worn on an arm is provided. An electronic device is provided, which includes a structure body having a curved surface as a support structure body, a flexible secondary battery including a film as an exterior body over the curved surface of the support structure body, and a display portion including a plurality of display elements between a pair of films over the secondary battery. The plurality of display elements and the secondary battery overlap with each other at least partly. It is possible to provide an electronic device which has a small maximum thickness of 1 cm or less and a light weight of 50 g or less even when an arm-worn secondary battery is provided with a display portion.

A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

Secondary battery

Disclosed is a power storage unit which can safely operate over a wide temperature range. The power storage unit includes: a power storage device; a heater for heating the power storage device; a temperature sensor for sensing the temperature of the power storage device; and a control circuit configured to inhibit charge of the power storage device when its temperature is lower than a first temperature or higher than a second temperature. The first temperature is exemplified by a temperature which allows the formation of a dendrite over a negative electrode of the power storage device, whereas the second temperature is exemplified by a temperature which causes decomposition of a passivating film formed over a surface of a negative electrode active material.

Power storage unit and solar power generation unit

A structure suitable for a portable information terminal or a wearable device is provided. In addition, an electronic device having a novel structure that can have various forms is provided. It is preferable that a buffer layer which absorbs a difference in the amount of change in form be provided between adjacent film substrates which overlap with each other. As the buffer layer, a gelled resin material, a rubber resin material, a liquid material, an air layer, or the like can be used. Furthermore, an optical film such as a polarizing film or a color filter may be used as the buffer layer. A plurality of buffer layers may be provided in an electronic device.

A novel electronic device is provided. Alternatively an electronic device of a novel embodiment is provided. An electronic device includes a ring portion and a display portion. The display portion is flexible. The display portion has a top surface and a first side surface in contact with at least one side of the top surface. The first side surface has a curved surface. The top surface includes a first display region. The first side surface includes a second display region. The first display region and the second display region are continuously provided. The electronic device is mounted such that the ring portion is in contact with a user's finger.

A novel electronic device is provided. Alternatively an electronic device of a novel embodiment is provided. An electronic device includes a support and a display portion. The support has a first curved surface. The display portion is provided over the support. The display portion has a top surface and a side surface in contact with at least one side of the top surface. The side surface has a second curved surface. The top surface includes a first display region. The side surface includes a second display region. The first display region and the second display region are continuously provided.

A wearable device needs to have a design corresponding to complicated surfaces of human bodies. Thus, an electronic device that can fit the characteristics of each individual human body after being purchased and can be worn naturally and comfortably is provided. The electronic device includes a secondary battery which can be transformed. By using a secondary battery which can be transformed, for example, a secondary battery can be efficiently placed in a narrow and elongated space in the electronic device, and the elongated secondary battery can be bent together with the electronic device. Furthermore, the weight balance of the electronic device can be easily adjusted.

Electronic device and glasses-type device including secondary battery

Touch panel having a photoelectric conversion element between the first and second flexible substrates

Growing community of inventors

Kanagawa, Japan

Masaaki Hiroki