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公开(公告)号：US11424622B2
公开(公告)日：2022-08-23
申请号：US15892517
申请日：2018-02-09
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Koichiro Kamata , Misako Sato , Shuhei Maeda
Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.
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公开(公告)号：US11366507B2
公开(公告)日：2022-06-21
申请号：US17104460
申请日：2020-11-25
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Shuhei Maeda , Shuhei Nagatsuka , Tatsuya Onuki , Kiyoshi Kato
IPC: G11C14/00 , G06F1/3234 , G11C5/14 , G11C16/30
Abstract: To reduce the area of a memory cell having a backup function. A storage device includes a cell array, and a row circuit and a column circuit that drive the cell array. The cell array includes a first power supply line, a second power supply line, a word line, a pair of bit lines, a memory cell, and a backup circuit. The cell array is located in a power domain where power gating can be performed. In the power gating sequence of the cell array, data in the memory cell is backed up to the backup circuit. The backup circuit is stacked over a region where the memory cell is formed. A plurality of wiring layers are provided between the backup circuit and the memory cell. The first power supply line, the second power supply line, the word line, and the pair of bit lines are located in different wiring layers.
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公开(公告)号：US11037622B2
公开(公告)日：2021-06-15
申请号：US16759013
申请日：2018-11-12
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Tomoaki Atsumi , Kiyoshi Kato , Shuhei Maeda
IPC: G11C11/00 , G11C11/4094 , H01L27/108 , H01L29/786
Abstract: A semiconductor device whose operating speed is increased is provided. The semiconductor device includes a write word line, a read word line, a write bit line, a read bit line, a first wiring, and a memory cell. The memory cell includes three transistors of a single conductivity type and a capacitor. Gates of the three transistors are electrically connected to the write word line, a first terminal of the capacitor, and the read word line, respectively. A second terminal of the capacitor is electrically connected to the read bit line. A source and a drain of one transistor are electrically connected to the write bit line and the gate of another transistor, respectively. Two of the three transistors are electrically connected in series between the read bit line and the first wiring. A channel formation region of each of the three transistors includes, for example, a metal oxide layer.
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公开(公告)号：US09998003B2
公开(公告)日：2018-06-12
申请号：US15331029
申请日：2016-10-21
Applicant: Semiconductor Energy Laboratory Co., LTD.
Inventor： Kei Takahashi , Koichiro Kamata , Misako Miwa , Shuhei Maeda
CPC classification number: H02M3/156 , G05F3/08 , H02J5/005 , H02J7/00 , H02J7/025 , H02J50/12 , H02M2001/0022
Abstract: A circuit capable of keeping input impedance constant is provided. Further, a circuit which can contribute to improvement in power feeding efficiency in power feeding by a magnetic resonance method is provided. A voltage (a former voltage) proportional to a direct-current voltage input to a DC-DC converter from the outside and a voltage (a latter voltage) proportional to a current input from the outside are detected, and the ratio of the former voltage and the latter voltage are held constant. Accordingly, input impedance can be kept constant. Further, impedance conversion is performed in the DC-DC converter. Thus, even when the battery in which power feeding is performed exists on an output side of the DC-DC converter, input impedance can be kept constant. Consequently, power can be supplied to a power receiving device including the DC-DC converter and the battery with high power feeding efficiency by a magnetic resonance method.
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公开(公告)号：US09673867B2
公开(公告)日：2017-06-06
申请号：US13789864
申请日：2013-03-08
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Shuhei Maeda , Koichiro Kamata , Misako Miwa
CPC classification number: H04B5/0037 , H04B5/0093
Abstract: There is provided a power transmission device which includes an antenna receiving a reflected power from a power receiving device, a power detection unit detecting a value of the reflected power received by the antenna, a control circuit determining a power adjustment value in accordance with the value of the reflected power, a power adjustment unit to which the reflected power whose value is detected is input and which adjusts impedance in accordance with the power adjustment value determined by the control circuit, and a demodulation circuit to which the reflected power having the power adjustment value determined by the control circuit is input via the power adjustment unit having the adjusted impedance, and relates to a power feeding system including the power transmission device.
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Patent Agency Ranking
公开(公告)号：US10200573B2
公开(公告)日：2019-02-05
申请号：US15173893
申请日：2016-06-06
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Seiichi Yoneda , Shuhei Maeda
Abstract: The imaging device includes a pixel array and first to seventh circuits. The first and second circuits select a pixel in the pixel array. The third circuit performs difference calculation between imaging data of the first frame and the second frame in the selected pixels. The fourth and the fifth circuits output addresses of the row and column of the pixels which has been subjected to the difference calculation. A row address and a column address for determining a specific region of the pixel array are stored in the sixth circuit. The seventh circuit compares coordinates included in the specific region with coordinates of pixels where a difference is detected. If the coordinates of the pixels where a difference is detected are included in the specific region which has been stored in the sixth circuit, imaging data is obtained again and is output to the external devices.
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公开(公告)号：US10110068B2
公开(公告)日：2018-10-23
申请号：US14456058
申请日：2014-08-11
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yutaka Shionoiri , Koichiro Kamata , Misako Sato , Shuhei Maeda
Abstract: An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end, without causing increases in complexity and size of devices. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver by receiving a position and resonant frequency detection signal using a plurality of sub-carriers having different frequencies from the power receiver, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.
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公开(公告)号：US20130249309A1
公开(公告)日：2013-09-26
申请号：US13804883
申请日：2013-03-14
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Misako MIWA , Koichiro Kamata , Shuhei Maeda
IPC: H04B5/00
CPC classification number: H04B5/0037 , B60L11/182 , H02J7/025 , H02J50/20 , H02J50/80 , H04B5/0093
Abstract: A power receiving device and a power feeding system which are capable of performing communication and power feeding at the same time are provided. Further, a power receiving device and a power feeding system which are capable of stably performing communication during power feeding are provided. One embodiment of the present invention relates to a power receiving device which includes an antenna for communication and power feeding that receives AC power, a rectifier circuit that rectifies the received AC power including the modulation signal into DC power, a smoothing circuit that smoothes the resulting DC power, a power storage device that stores the smoothed DC power, a communication control unit that analyzes the modulation signal included in the AC power, and a transformer that is positioned between the antenna and the rectifier circuit and changes a reference potential of the AC power, and a power feeding device.
Abstract translation: 提供能够同时进行通信和供电的电力接收装置和供电系统。 此外，提供能够在供电期间稳定地进行通信的受电装置和供电系统。 本发明的一个实施例涉及一种电力接收装置，其包括用于通信和馈电的天线，其接收AC电力;整流电路，将包括调制信号的所接收的AC电力整流为DC电力;平滑电路， 直流电力，存储平滑的直流电力的蓄电装置，分析交流电源中包含的调制信号的通信控制单元和位于天线与整流电路之间的变压器，并改变交流电的参考电位 电源和馈电装置。
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公开(公告)号：US12266398B2
公开(公告)日：2025-04-01
申请号：US17337552
申请日：2021-06-03
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Tomoaki Atsumi , Kiyoshi Kato , Shuhei Maeda
IPC: G11C11/40 , G11C11/4094 , H01L29/786 , H10B12/00
Abstract: A semiconductor device whose operating speed is increased is provided. The semiconductor device includes a write word line, a read word line, a write bit line, a read bit line, a first wiring, and a memory cell. The memory cell includes three transistors of a single conductivity type and a capacitor. Gates of the three transistors are electrically connected to the write word line, a first terminal of the capacitor, and the read word line, respectively. A second terminal of the capacitor is electrically connected to the read bit line. A source and a drain of one transistor are electrically connected to the write bit line and the gate of another transistor, respectively. Two of the three transistors are electrically connected in series between the read bit line and the first wiring. A channel formation region of each of the three transistors includes, for example, a metal oxide layer.
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公开(公告)号：US11843259B2
公开(公告)日：2023-12-12
申请号：US17887305
申请日：2022-08-12
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Koichiro Kamata , Misako Sato , Shuhei Maeda
CPC classification number: H02J50/12 , H02J5/00 , H02J50/502 , H02J50/90 , H01F38/00
Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.
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