公开(公告)号：US20210384753A1

公开(公告)日：2021-12-09

申请号：US17283689

申请日：2019-10-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Munehiro KOZUMA ,  Takayuki IKEDA ,  Takanori MATSUZAKI ,  Kei TAKAHASHI ,  Mayumi MIKAMI ,  Shunpei YAMAZAKI

IPC: H02J7/00 ,  G11C11/401 ,  H01M10/48 ,  H01M10/42 ,  H01M10/613 ,  H01M10/615 ,  H01M10/633 ,  H01M10/625 ,  H01M10/0525

Abstract: The safety is ensured in such a manner that with an abnormality detection system of a secondary battery, abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early, and a user is warned or the use of the secondary battery is stopped. The abnormality detection system of the secondary battery determines whether the temperature of the secondary battery is within a temperature range in which normal operation can be performed on the basis of temperature data obtained with a temperature sensor. In the case where the temperature of the secondary battery is high, a cooling device is driven by a control signal from the abnormality detection system of the secondary battery. The abnormality detection system of the secondary battery includes at least a memory means. The memory means has a function of holding an analog signal and includes a transistor using an oxide semiconductor for a semiconductor layer.

公开(公告)号：US20210376646A1

公开(公告)日：2021-12-02

申请号：US17256667

申请日：2019-06-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Koji KUSUNOKI ,  Kouhei TOYOTAKA ,  Kazunori WATANABE

IPC: H02J7/00 ,  G01R31/3835 ,  G01R31/396

Abstract: A battery management circuit with a novel structure and a power storage device including the battery management circuit are provided. The power storage device includes a plurality of battery cells connected in series and a battery management circuit. The battery management circuit includes a voltage monitor circuit having a function of acquiring a voltage value between a pair of electrodes of any one of the battery cells. The voltage monitor circuit includes a multiplexer and a buffer circuit for outputting a signal for controlling the multiplexer. The multiplexer and the buffer circuit each include an n-channel transistor. The n-channel transistor is a transistor including an oxide semiconductor in a channel formation region. The multiplexer has a function of retaining an output voltage of the battery cell by setting the transistor in an off state.

公开(公告)号：US20210366368A1

公开(公告)日：2021-11-25

申请号：US17052833

申请日：2019-05-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazunori WATANABE ,  Kei TAKAHASHI ,  Koji KUSUNOKI ,  Takahiro FUKUTOME

IPC: G09G3/32 ,  H01L25/04 ,  H01L25/075 ,  H01L27/12 ,  H01L29/786 ,  H01L33/62 ,  H01L51/56 ,  G09G3/3225

Abstract: A novel display device where a light-emitting element is turned on by a triangle wave is provided. One embodiment of the present invention is a method for driving a display device including a first pixel, a second pixel, a first wiring, a second wiring, and a third wiring. The first wiring is electrically connected to the first pixel and the second pixel. The second wiring and the third wiring are electrically connected to the first pixel and the second pixel, respectively. At a first time, the first pixel reaches the maximum luminance corresponding to first display data and the second pixel reaches the maximum luminance corresponding to second display data. The first pixel and the second pixel are initialized at a second time different from the first time by input of a reset signal to the first wiring to stop light emission.

公开(公告)号：US20210313122A1

公开(公告)日：2021-10-07

申请号：US17354079

申请日：2021-06-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takuya KAWATA ,  Kei TAKAHASHI

IPC: H01G11/78 ,  H01G11/82 ,  H01M50/24 ,  H01M50/209

Abstract: To provide a flexible, highly reliable power storage device or light-emitting device. The device includes a battery unit or a light-emitting unit and a member with rubber elasticity. The battery unit includes a secondary battery. The light-emitting unit includes a light-emitting element. The member with rubber elasticity is provided with a first projection and a second projection. The first projection and the second projection are arranged on a first surface of the battery unit or the light-emitting unit. The first projection and the second projection come in contact with each other when the power storage device is bent such that the first surface of the battery unit faces inward.

公开(公告)号：US20210294367A1

公开(公告)日：2021-09-23

申请号：US17265361

申请日：2019-07-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kei TAKAHASHI ,  Yuto YAKUBO ,  Hiroki INOUE

IPC: G05F1/56 ,  H03F3/45 ,  H01L29/786 ,  H03K3/356

Abstract: An output gain of a latch circuit is increased. The latch circuit includes a first circuit, a second circuit, and first to fourth transistors. The latch circuit includes a first input/output terminal and a second input/output terminal. The first circuit and the second circuit have a function of a current source. In the case where the third transistor is off and the fourth transistor is on, the latch circuit is supplied with a first input signal supplied to the first input/output terminal and a second input signal supplied to the second input/output terminal. In the case where the third transistor is on and the fourth transistor is off, an inverted signal of the first input signal is output to the first input/output terminal of the latch circuit, and an inverted signal of the second input signal is output to the second input/output terminal of the latch circuit. The first circuit and the second circuit increase the output gain of the latch circuit.

公开(公告)号：US20210280611A1

公开(公告)日：2021-09-09

申请号：US17322954

申请日：2021-05-18

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Kei TAKAHASHI ,  Yoshiyuki KUROKAWA

IPC: H01L27/12 ,  G02F1/1362 ,  G02F1/1368 ,  H01L29/24 ,  H01L29/786

Abstract: A display device that is suitable for increasing its size is provided.
The display device includes first to third wirings, a first transistor, first to third conductive layers, and a first pixel electrode; the first wiring extends in a first direction and intersects with the second and the third wirings; the second and the third wirings each extend in a second direction intersecting with the first direction; a gate of the first transistor is electrically connected to the first wiring; one of a source and a drain of the first transistor is electrically connected to the second wiring through the first to the third conductive layers; the second conductive layer includes a region overlapping with the third wiring; the first conductive layer, the third conductive layer, and the first pixel electrode contain the same material; the first wiring and the second conductive layer contain the same material; the first wiring is supplied with a selection signal; and the second and the third wirings are supplied with different signals.

公开(公告)号：US20210174757A1

公开(公告)日：2021-06-10

申请号：US16771246

申请日：2018-12-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: G09G3/36 ,  G06F3/041

Abstract: A novel display panel that is highly convenient or reliable is provided. A pixel circuit includes a first switch, a node, a capacitor, and a second switch. The first switch includes a first terminal to which a first signal is supplied and a second terminal electrically connected to the node. The capacitor includes a first terminal electrically connected to the node and a second terminal electrically connected to the second switch. The second switch includes a first terminal to which a second signal is supplied and a second terminal electrically connected to the second terminal of the capacitor. In addition, the second switch has a function of changing from a non-conducting state to a conducting state when the first switch is in a non-conducting state and a function of changing from a conducting state to a non-conducting state when the first switch is in a non-conducting state. The display element performs display on the basis of a potential of the node.

公开(公告)号：US20210110783A1

公开(公告)日：2021-04-15

申请号：US16971137

申请日：2019-02-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Susumu KAWASHIMA ,  Kouhei TOYOTAKA ,  Koji KUSUNOKI ,  Kei TAKAHASHI ,  Kentaro HAYASHI

IPC: G09G3/36 ,  G09G3/34

Abstract: A display device operating at high speed is provided.
The display device includes a pixel provided with a first memory circuit, a second memory circuit, and a display unit, in which the first memory circuit and the second memory circuit are electrically connected to one electrode of the display unit. The operation of the display device includes a first period of writing first image data to the first memory circuit and writing second image data to the second memory circuit, a second period of supplying a first potential to the first memory circuit, a third period of displaying a first image corresponding to the first image data, a fourth period of setting a potential of the one electrode of the display unit to a second potential, a fifth period of supplying the first potential to the second memory circuit, and a sixth period of displaying a second image corresponding to the second image data.

公开(公告)号：US20210096409A1

公开(公告)日：2021-04-01

申请号：US16956623

申请日：2018-12-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kouhei TOYOTAKA ,  Kazunori WATANABE ,  Susumu KAWASHIMA ,  Kei TAKAHASHI ,  Koji KUSUNOKI ,  Masataka NAKADA ,  Ami SATO

IPC: G02F1/1368 ,  G02F1/1362

Abstract: A liquid crystal display device with a high aperture ratio is provided. The display device includes a transistor, a first insulating layer, a second insulating layer, a third insulating layer, a first conductive layer, a pixel electrode, a common electrode, and a liquid crystal layer in a pixel. The first insulating layer is positioned over a channel formation region of the transistor. The first conductive layer is positioned over the first insulating layer. The second insulating layer is positioned over the transistor, the first insulating layer, and the first conductive layer. The pixel electrode is positioned over the second insulating layer, the third insulating layer is positioned over the pixel electrode, the common electrode is positioned over the third insulating layer, and the liquid crystal layer is positioned over the common electrode. The common electrode includes a region overlapping with the first conductive layer with the pixel electrode positioned therebetween. The pixel includes a first connection portion where the pixel electrode is electrically connected to the transistor and a second connection portion where the first conductive layer is electrically connected to the common electrode. The first conductive layer, the pixel electrode, and the common electrode each have a function of transmitting visible light.

公开(公告)号：US20210065640A1

公开(公告)日：2021-03-04

申请号：US16901129

申请日：2020-06-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hidetomo KOBAYASHI ,  Kei TAKAHASHI ,  Shunpei YAMAZAKI

IPC: G09G3/36 ,  G02F1/1362 ,  G02F1/1343 ,  H01L29/786 ,  G06F1/16 ,  G09G3/3233 ,  H01L27/12 ,  G02B27/01 ,  H04M1/02

Abstract: A display device with favorable display quality is provided. A display portion where a plurality of pixels is arranged in a matrix is divided into Region A and Region B, i.e., regions on the upstream side and the downstream side of a scanning direction. A signal line for supplying an image signal is provided in each of Region A and Region B. Region A and Region B adjoin each other such that a boundary line showing the boundary between the regions is bent. Bending the boundary line suppresses formation of a stripe in a boundary portion. For example, in a given column, the total number of pixels electrically connected to a signal line in Region A is made different from the total number of pixels electrically connected to a signal line in Region B.