公开(公告)号：US20220172677A1

公开(公告)日：2022-06-02

申请号：US17546696

申请日：2021-12-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shintaro HARADA ,  Yoshiyuki KUROKAWA ,  Takeshi AOKI ,  Yuki OKAMOTO ,  Hiroki INOUE ,  Koji KUSUNOKI ,  Yosuke TSUKAMOTO ,  Katsuki YANAGAWA ,  Kei TAKAHASHI ,  Shunpei YAMAZAKI

IPC: G09G3/3225 ,  G06F1/16 ,  G06F3/041 ,  G06N3/04 ,  G06N3/08 ,  G09G5/22 ,  G06V30/32

Abstract: An electronic device capable of efficiently recognizing a handwritten character is provided.
The electronic device includes a first circuit, a display portion, and a touch sensor. The first circuit includes a neural network. The display portion includes a flexible display. The touch sensor has the function of outputting an input handwritten character as image information to the first circuit. The first circuit has the function of analyzing the image information and converting the image information into character information, and a function of displaying an image including the character information on the display portion. The analysis is performed by inference through the use of the neural network.

公开(公告)号：US20220131392A1

公开(公告)日：2022-04-28

申请号：US17431302

申请日：2020-02-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Toshiyuki ISA ,  Takayuki IKEDA ,  Kei TAKAHASHI ,  Ryota TAJIMA

IPC: H02J7/00 ,  H01L27/02 ,  G01R31/367

Abstract: The safety is ensured in such a manner that an abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early and a warning is given to a user. A first protection circuit and a second protection circuit are provided for one secondary battery. The first protection circuit includes a memory circuit including a transistor including an oxide semiconductor. Combination of a plurality of protection circuits enables a complementary double protection system in charging, and the safety can be further enhanced.

公开(公告)号：US20220085427A1

公开(公告)日：2022-03-17

申请号：US17420536

申请日：2020-01-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota TAJIMA ,  Kei TAKAHASHI ,  Hiroki INOUE ,  Munehiro KOZUMA ,  Takahiro FUKUTOME

IPC: H01M10/44 ,  G01R31/367 ,  H02J7/00 ,  H01M10/48

Abstract: A semiconductor device that inhibits deterioration of a secondary battery is provided. The semiconductor device includes a secondary battery module and a first circuit. The secondary battery module includes a secondary battery and a sensor. The first circuit includes a variable resistor. The sensor has a function of measuring a temperature of the secondary battery. The first circuit has a function of judging the charge voltage of the secondary battery and outputting a first result; a function of judging the temperature of the secondary battery measured by the sensor and outputting a second result; a function of determining the magnitude of the variable resistor on the basis of the first result and the second result; a function of discharging the charge voltage through the variable resistor; and a function of stopping discharge when the charge voltage reaches a specified voltage.

公开(公告)号：US20220006309A1

公开(公告)日：2022-01-06

申请号：US17292218

申请日：2019-11-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Yuki OKAMOTO ,  Minato ITO ,  Takahiko ISHIZU ,  Hiroki INOUE ,  Shunpei YAMAZAKI

IPC: H02J7/00 ,  H01M10/44 ,  H03K17/082 ,  H01M10/42 ,  H03K3/0231

Abstract: A semiconductor device with reduced power consumption is provided. The semiconductor device includes a node ND1, a node ND2, a resistor, a capacitor, and a comparison circuit. The resistor is electrically connected in series between one of a positive electrode and a negative electrode of a secondary battery and a first terminal. The resistor has a function of converting current flowing between the one of the positive electrode and the negative electrode of the secondary battery and the first terminal into a first voltage. The first voltage is added to a voltage of the node ND2 through the capacitor. The comparison circuit has a function of comparing a voltage of the node ND1 and the voltage of the node ND2. The comparison circuit outputs a signal that notifies detection of overcurrent when the voltage of the node ND2 is higher than the voltage of the node ND1.

公开(公告)号：US20210384751A1

公开(公告)日：2021-12-09

申请号：US17286088

申请日：2019-10-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Takayuki IKEDA ,  Takanori MATSUZAKI ,  Munehiro KOZUMA ,  Hiroki INOUE ,  Ryota TAJIMA ,  Yohei MOMMA ,  Mayumi MIKAMI ,  Kazutaka KURIKI ,  Shunpei YAMAZAKI

IPC: H02J7/00

Abstract: A battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including either of the battery circuits are provided. The power storage device includes a first circuit portion, a second circuit portion, a third circuit portion, and a secondary battery; the first circuit portion has a function of controlling charging of the secondary battery; the first circuit portion has a function of supplying the start time and the end time of the charging of the secondary battery to the third circuit portion; the second circuit portion has functions of generating a first voltage and a first current and supplying them to the third circuit portion; the third circuit portion has a function of generating a second voltage by charging the first current in a capacitor; and the third circuit portion has a function of comparing the first voltage and the second voltage.

公开(公告)号：US20210210512A1

公开(公告)日：2021-07-08

申请号：US17187928

申请日：2021-03-01

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Shunpei YAMAZAKI

IPC: H01L27/12 ,  G09G3/20 ,  G09G3/32 ,  G09G3/36 ,  G09G5/00

Abstract: A display device with high resolution is provided. A display device with high display quality is provided. A display device includes a display portion, a first terminal group, and a second terminal group. The display portion includes pixels, scan lines, and signal lines. The first terminal group and the second terminal group are apart from each other. The first terminal group includes first terminals and the second terminal group includes second terminals. The scan lines are each electrically connected to the pixels arranged in a row direction. The signal lines are each electrically connected to the pixels arranged in a column direction. The signal lines are each electrically connected to the first terminal or the second terminal. The display portion includes a first region where the signal lines electrically connected to the first terminals and the signal lines electrically connected to the second terminals are mixed.

公开(公告)号：US20210143500A1

公开(公告)日：2021-05-13

申请号：US17154462

申请日：2021-01-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru TAKAHASHI ,  Shunpei YAMAZAKI ,  Masaaki HIROKI ,  Kei TAKAHASHI ,  Junpei MOMO

IPC: H01M10/6571 ,  H01M10/637 ,  H01M10/44 ,  H01M10/63 ,  H01M10/46 ,  H01M10/48 ,  H02J7/35 ,  H02S10/20 ,  H01M10/615 ,  H01M10/0525 ,  H02J7/00

Abstract: 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.

公开(公告)号：US20210135472A1

公开(公告)日：2021-05-06

申请号：US17140350

申请日：2021-01-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Hiroyuki MIYAKE ,  Kei TAKAHASHI

IPC: H02J7/00 ,  H02J50/80 ,  H02J50/20 ,  H02J50/12 ,  H01M10/0525 ,  H01M10/0583 ,  H01M10/0585 ,  H01M4/96 ,  H01M10/42 ,  H01M10/44

Abstract: A decrease in the capacity of a power storage device is inhibited by adjusting or reducing imbalance in the amount of inserted and extracted carrier ions between positive and negative electrodes, which is caused by decomposition of an electrolyte solution of the negative electrode. Further, the capacity of the power storage device can be restored. Furthermore, impurities in the electrolyte solution can be decomposed with the use of the third electrode. A power storage device including positive and negative electrodes, an electrolyte, and a third electrode is provided. The third electrode has an adequate electrostatic capacitance. The third electrode can include a material with a large surface area. In addition, a method for charging the power storage device including the steps of performing charging by applying a current between the positive and negative electrodes, and performing additional applying a current between the third electrode and the negative electrode is provided.

公开(公告)号：US20200279525A1

公开(公告)日：2020-09-03

申请号：US16758108

申请日：2018-11-01

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Kouhei TOYOTAKA ,  Kei TAKAHASHI ,  Kentaro HAYASHI ,  Shunpei YAMAZAKI

IPC: G09G3/3225 ,  H01L27/32 ,  H01L29/786

Abstract: A display device that can display a high-luminance image is provided. The display device includes a display element and a memory circuit which is electrically connected to a first wiring and a second wiring. First, a reference potential is supplied to the first wiring. Next, a first image signal is supplied to the memory circuit through the second wiring. Then, the second image signal is added to the first image signal by supplying the second image signal to the memory circuit through the first wiring. After that, an image obtained by superimposing an image corresponding to the first image signal and an image corresponding to the second image signal on each other is displayed with the display element.

公开(公告)号：US20200218123A1

公开(公告)日：2020-07-09

申请号：US16821174

申请日：2020-03-17

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Kei TAKAHASHI

IPC: G02F1/1362 ,  G02F1/1343

Abstract: To achieve a display device that is suitable for increasing in size and to provide a high-resolution display device. In the display device, three or more adjacent gate lines are supplied with the same selection signal. Three or more pixels that adjoin in the column direction are connected to different source lines. In each of the pixels, a transistor including a semiconductor layer is disposed. An inner source line among three or more source lines is disposed to overlap with a conductive layer that functions as a pixel electrode. Part of the semiconductor layer of the transistor is provided between the outer source line and a source line adjacent to the outer source line.