公开(公告)号：US20250070284A1

公开(公告)日：2025-02-27

申请号：US18941267

申请日：2024-11-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M10/44 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/46 ,  H01M10/48 ,  H01M10/615 ,  H01M10/63 ,  H01M10/637 ,  H01M10/6571 ,  H02J7/35 ,  H02S10/20

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：US20250057004A1

公开(公告)日：2025-02-13

申请号：US18739446

申请日：2024-06-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Hidetomo KOBAYASHI

IPC: H10K59/60 ,  G06F1/16 ,  G06V40/13 ,  H10K59/35 ,  H10K77/10

Abstract: Common noise is reduced from light-receiving data. A display module includes a display apparatus and a reading circuit. Each of a first pixel and a second pixel adjacent to each other in the display apparatus includes a light-receiving element and a light-emitting element. The reading circuit includes a differential input circuit. Common noise generated when display data is supplied to a light-emitting element, for example, may affect a first light-receiving signal output by the first pixel and a second light-receiving signal output by the second pixel. A first current is generated using the first light-receiving signal and a ramp signal, and a second current is generated using the second light-receiving signal and a first potential. The differential input circuit is controlled so that the first current and the second current have the same current value, whereby common noise can be removed from the first light-receiving signal.

公开(公告)号：US20220367595A1

公开(公告)日：2022-11-17

申请号：US17711172

申请日：2022-04-01

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Susumu KAWASHIMA ,  Kei TAKAHASHI

IPC: H01L27/32 ,  G06N3/04 ,  G06N3/063 ,  G09G3/32 ,  H01L25/065 ,  H01L27/15

Abstract: A novel display panel that is highly convenient or reliable is provided. A novel display device is provided. The display panel includes a display region, a first terminal region, and a second terminal region, and the first terminal region is provided not to block the display region and includes a region overlapping with the display region. The first terminal region includes a first group of terminals, and the first group of terminals includes a first terminal. The second terminal region includes a second group of terminals, and the second group of terminals includes a second terminal. The display region includes one group of pixels, another group of pixels, a scan line, and a signal line. The one group of pixels includes a pixel and is arranged in a row direction. The another group of pixels includes the pixel and is arranged in a column direction intersecting the row direction. The scan line is electrically connected to the one group of pixels. The signal line is electrically connected to the another group of pixels, and the signal line is electrically connected to the first terminal and the second terminal.

公开(公告)号：US20220278680A1

公开(公告)日：2022-09-01

申请号：US17742642

申请日：2022-05-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroyuki MIYAKE ,  Kei TAKAHASHI

IPC: H03K17/16 ,  G09G3/36 ,  G11C19/28 ,  H01L27/088 ,  H03K17/687

Abstract: An object of the present invention is to suppress deterioration in the thin film transistor. A plurality of pulse output circuits each include first to eleventh thin film transistors is formed. The pulse output circuit is operated on the basis of a plurality of clock signals which control each transistor, the previous stage signal input from a pulse output circuit in the previous stage, the next stage signal input from a pulse output circuit in the next stage, and a reset signal. In addition, a microcrystalline semiconductor is used for a semiconductor layer serving as a channel region of each transistor. Therefore, degradation of characteristics of the transistor can be suppressed.

公开(公告)号：US20220236824A1

公开(公告)日：2022-07-28

申请号：US17717304

申请日：2022-04-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Hiroyuki MIYAKE

IPC: G06F3/041 ,  G09G3/3233

Abstract: A circuit which detects an output current from a pixel and an output current from an input device, and converts the output current into data is provided. The current detection circuit includes an integer circuit, a comparator, a counter, and a latch. The integrator circuit integrates the potential of a first signal during a period determined by a second signal and outputting it as a third signal. The comparator compares the potential of the third signal with a first potential and outputting a fourth signal. The counter outputs the number of pulses included in a fifth signal as a sixth signal during a period determined by the fourth signal. The latch holds the sixth signal. The integrator circuit preferably further includes an operational amplifier and some capacitors. The first signal is supplied from a pixel included in a display device or an input portion included in an input device.

公开(公告)号：US20220122526A1

公开(公告)日：2022-04-21

申请号：US17562425

申请日：2021-12-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: G09G3/32 ,  H01L25/075 ,  H01L27/105 ,  H01L27/12

Abstract: A novel display is provided. A display having a small change in chromaticity of a micro light-emitting diode in proportion to current density is provided. A display capable of reducing power consumption in the driver circuit when displaying a still image is provided. The display includes a plurality of pixels each including a display element and a microcontroller. The microcontroller includes a first transistor, a triangular wave generator circuit, a comparator, a switch, and a constant current circuit. The first transistor has a function of retaining a potential corresponding to data written to the pixel by being switched off. The triangular wave generator circuit has a function of generating a triangular wave signal. The comparator has a function of generating an output signal corresponding to the potential and the triangular wave signal. The switch has a function of controlling whether or not to make a current flowing in the constant current circuit flow to the display element in accordance with the output signal.

公开(公告)号：US20220102340A1

公开(公告)日：2022-03-31

申请号：US17425348

申请日：2020-02-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Takeshi AOKI

IPC: H01L27/06 ,  H01L29/786 ,  H03F3/16

Abstract: A novel comparison circuit, a novel amplifier circuit, a novel battery control circuit, a novel battery protection circuit, a power storage device, a semiconductor device, an electronic device, and the like are provided. The semiconductor device includes a capacitor, a first amplifier circuit including a first output terminal electrically connected to a first electrode of the capacitor, and a second amplifier circuit including an input terminal, a second output terminal, a first transistor, and a second transistor; a second electrode of the capacitor is electrically connected to the input terminal; the input terminal is electrically connected to a gate of the first transistor and one of a source and a drain of the second transistor; one of a source and a drain of the first transistor is electrically connected to the second output terminal; the second transistor has a function of supplying a potential to the input terminal and holding the potential; and a channel formation region of the second transistor includes a metal oxide containing at least one of indium and gallium.

公开(公告)号：US20220094177A1

公开(公告)日：2022-03-24

申请号：US17422314

申请日：2020-01-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yuki OKAMOTO ,  Takahiko ISHIZU ,  Kei TAKAHASHI ,  Takayuki IKEDA

IPC: H02J7/00

Abstract: A battery control circuit having a novel structure, a battery protection circuit having a novel structure, and a power storage device including the battery circuit are provided. A semiconductor device includes n cell balancing circuits that respectively correspond to one secondary battery and each include a transistor, a comparator circuit, and a capacitor. In each of the n cell balancing circuits, an inverting input terminal of the comparator circuit and one electrode of the capacitor are electrically connected to one of a source and a drain of the transistor. The semiconductor device has functions of supplying a ground potential to the other electrode of the capacitor; turning on the transistor; supplying a first potential to the one electrode of the capacitor; turning off the transistor; electrically connecting the other electrode of the capacitor and a negative electrode of the secondary battery corresponding to each cell balancing circuit; supplying a sum of the first potential and a potential of the negative electrode of the secondary battery corresponding to each cell balancing circuit, to the one electrode of the capacitor; and controlling charging of the secondary battery corresponding to each cell balancing circuit.

公开(公告)号：US20220077705A1

公开(公告)日：2022-03-10

申请号：US17417482

申请日：2019-12-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Takayuki IKEDA ,  Munehiro KOZUMA ,  Takanori MATSUZAKI ,  Takahiko ISHIZU ,  Takeshi AOKI

IPC: H02J7/00

Abstract: A secondary battery deteriorates due to repeated charging and discharging, which leads to a decrease in a battery voltage and a battery capacity. The lifetime of a secondary battery is prolonged by preventing charging at an excessive charging value that would be caused by deterioration of the secondary battery. By performing charge control in consideration of the degree of deterioration of a secondary battery, a longer lifetime of a secondary battery can be achieved. In charging a secondary battery, a charge control circuit controls a current value to a preset value, and a charging current control circuit (specifically a circuit including an error amplifier) included in a protection circuit determines a current value supplied to the secondary battery. That is, the current value supplied to the secondary battery is controlled by both the charge control circuit and the charging current control circuit that is a part of the protection circuit.

公开(公告)号：US20210408902A1

公开(公告)日：2021-12-30

申请号：US17288957

申请日：2019-10-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Takeshi AOKI

IPC: H02M3/155 ,  H02M1/00 ,  H01L27/108 ,  H01L27/12 ,  H01L29/786

Abstract: A power supply circuit with a novel structure is provided. The power supply circuit includes a power converter circuit supplying power to a load; a current sensing circuit generating a first signal including data on a current flowing through the load; a voltage sensing circuit generating a second signal including data on a voltage applied to the load; a correction circuit that includes a digital filter, a digital-analog converter circuit to which a signal output from the digital filter is input, and a sample-and-hold circuit for retaining a signal output from the digital-analog converter circuit and generates a third signal obtained by correcting the second signal; a selection circuit selecting the first signal or the third signal; an output circuit generating an output signal for controlling the power converter circuit in accordance with the signal selected by the selection circuit; and a control signal generation circuit controlling switching between a first operation for generating the output signal in accordance with the first signal and generating the third signal and a second operation for generating the output signal in accordance with the third signal.