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公开(公告)号：US10860080B2
公开(公告)日：2020-12-08
申请号：US16476642
申请日：2018-01-09
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Shuhei Maeda , Shuhei Nagatsuka , Tatsuya Onuki , Kiyoshi Kato
IPC: G11C11/409 , G06F1/3234 , G11C5/14 , G11C14/00 , 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：US09837977B2
公开(公告)日：2017-12-05
申请号：US14680169
申请日：2015-04-07
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Koichiro Kamata , Shinya Okano , Misako Sato , Shuhei Maeda
CPC classification number: H03H7/38 , H01F38/14 , H02J5/005 , H02J7/025 , H02J50/12 , H02J50/40 , H02J50/80 , H03C1/36 , H03D1/02
Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.
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公开(公告)号：US09641223B2
公开(公告)日：2017-05-02
申请号：US13804883
申请日：2013-03-14
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Misako Miwa , Koichiro Kamata , Shuhei Maeda
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.
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公开(公告)号：US09477249B2
公开(公告)日：2016-10-25
申请号：US13711961
申请日：2012-12-12
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.
Abstract translation: 提供能够保持输入阻抗恒定的电路。 此外，提供了可以通过磁共振方法有助于提高馈电的馈电效率的电路。 检测与从外部输入到DC-DC转换器的直流电压成比例的电压（前一个电压）和与从外部输入的电流成比例的电压（后一个电压），并且前一个电压 并且后一电压保持恒定。 因此，输入阻抗可以保持恒定。 此外，在DC-DC转换器中进行阻抗转换。 因此，即使在DC-DC转换器的输出侧存在进行供电的电池，也可以保持输入阻抗恒定。 因此，可以通过磁共振方式向具有高功率馈送效率的DC-DC转换器和电池的电力接收装置供电。
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公开(公告)号：US20130154385A1
公开(公告)日：2013-06-20
申请号：US13709424
申请日：2012-12-10
Applicant: Semiconductor Energy Laboratory Co., LTD.
Inventor： Misako Miwa , Shuhei Maeda
IPC: H02J17/00
CPC classification number: H02J50/12 , H02J5/005 , H02J7/025 , H02J17/00 , H02J50/80 , H04B5/0037 , H04B5/0093
Abstract: The invented power feeding system includes power transmitting and power receiving devices. The power transmitting device includes an AC power source, a first electromagnetic induction coil, a first resonant coil, and a first capacitor. The power receiving device includes an antenna unit including a second resonant coil, a second capacitor, and a second electromagnetic induction coil; a charging circuit unit including a rectifier circuit, a power storage device, a current detection circuit for detecting a current value supplied to the power storage device, and a voltage detection circuit for detecting a voltage value applied to the power storage device; and a communication control unit including a control circuit for generating a selection signal based on the detected current value and the detected current voltage, a plurality of switches to be turned on or off by the selection signal, and passive elements electrically connected to the plurality of switches.
Abstract translation: 本发明的馈电系统包括电力传输和电力接收装置。 电力传输装置包括AC电源，第一电磁感应线圈，第一谐振线圈和第一电容器。 电力接收装置包括：天线单元，包括第二谐振线圈，第二电容器和第二电磁感应线圈; 充电电路单元，包括整流电路，蓄电装置，用于检测提供给蓄电装置的电流值的电流检测电路，以及用于检测施加到蓄电装置的电压值的电压检测电路; 以及通信控制单元，其包括用于基于检测到的电流值和检测到的电流电压产生选择信号的控制电路，通过选择信号导通或关断的多个开关，以及与多个 开关。
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Patent Agency Ranking
16.发明授权公开(公告)号：US10044224B2
公开(公告)日：2018-08-07
申请号：US15182844
申请日：2016-06-15
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Koichiro Kamata , Misako Sato , Shuhei Maeda
IPC: H01F27/42 , H01F37/00 , H01F38/00 , H02J50/10 , H04B1/44 , H02J50/90 , H02J50/40 , H02J5/00 , H02J17/00 , H02J50/12 , H02J50/80 , H02J50/20 , H02J7/02 , H02J50/05
Abstract: An object is to provide a power feeding device, a power feeding system, and a power feeding method which are more convenient for a power feeding user at the power receiving end. The power feeding device includes a means of controlling a frequency of a power signal transmitted to a power receiver, based on a proportion of signals, among power signals output to an antenna circuit, that return from the power receiver to the antenna circuit without feeding power to the power receiver.
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公开(公告)号：US09934740B2
公开(公告)日：2018-04-03
申请号：US15146085
申请日：2016-05-04
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Shuhei Maeda
IPC: G09G3/36 , G09G3/3225
CPC classification number: G09G3/3648 , G09G3/3225 , G09G2320/103 , G09G2330/021 , G09G2340/16 , H01L2224/48091 , H01L2224/73265 , H01L2924/00014
Abstract: Provided is a display system whose power consumption can be reduced. The display system includes an imaging device and a display device. The imaging device includes first pixels, a first circuit, and a second circuit. The first pixels are arranged in a matrix. The first circuit is configured to detect a difference between imaging data of a reference frame and imaging data of a difference detection frame. The second circuit is configured to detect a row of the first pixels where the difference is detected. The display device includes second pixels and a third circuit. The third circuit selects a row of the second pixels that corresponds to the row of the first pixels detected by the second circuit. Image data retained in the second pixels is rewritten only in the selected row.
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公开(公告)号：US20130285464A1
公开(公告)日：2013-10-31
申请号：US13864303
申请日：2013-04-17
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Misako Miwa , Koichiro Kamata , Yutaka Shionoiri , Shuhei Maeda
IPC: H04B5/00
CPC classification number: H04B5/0037 , H04B5/0087
Abstract: To provide a power feeding system and the like with which charging can be performed without a decrease in the power supply efficiency. To provide a power feeding system and the like with which can offer a power feeding service which is efficient to both a power feeding user and a power feeding provider. The power transmission state in each of power transmitting portions is monitored, the power transmitting portion having the highest power transmission efficiency is selected based on positional advantage, and the power transmitting resonance coil included in the selected power transmitting portion is kept at a first resonance frequency, whereby power transmission continues. The resonance frequency of the power transmitting resonance coil included in the non-selected power transmitting portion (the number of the non-selected power transmitting portions may be plural) is set to a second resonance frequency, whereby power transmission is stopped.
Abstract translation: 为了提供能够进行充电而不降低电力供给效率的供电系统等。 为了提供能够提供对供电用户和供电提供者都有效的供电服务的供电系统等。 监视每个电力传输部分中的电力传输状态，基于位置优势选择具有最高功率传输效率的电力传输部分，并且包括在所选择的电力发送部分中的电力发送谐振线圈保持在第一谐振频率 ，从而继续传输电力。 包括在未选择的动力传递部中的动力传递共振线圈（未选择的动力传递部的数量可以是多个）的共振频率被设定为第二共振频率，从而停止动力传递。
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公开(公告)号：US09912170B2
公开(公告)日：2018-03-06
申请号：US14731776
申请日：2015-06-05
Applicant: Semiconductor Energy Laboratory Co., LTD.
Inventor： Koichiro Kamata , Misako Sato , Shuhei Maeda
CPC classification number: H02J5/005 , H01F38/00 , H02J5/00 , H02J17/00 , H02J50/12 , H02J50/40 , H02J50/90
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：US09847675B2
公开(公告)日：2017-12-19
申请号：US13709424
申请日：2012-12-10
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Misako Miwa , Shuhei Maeda
CPC classification number: H02J50/12 , H02J5/005 , H02J7/025 , H02J17/00 , H02J50/80 , H04B5/0037 , H04B5/0093
Abstract: The invented power feeding system includes power transmitting and power receiving devices. The power transmitting device includes an AC power source, a first electromagnetic induction coil, a first resonant coil, and a first capacitor. The power receiving device includes an antenna unit including a second resonant coil, a second capacitor, and a second electromagnetic induction coil; a charging circuit unit including a rectifier circuit, a power storage device, a current detection circuit for detecting a current value supplied to the power storage device, and a voltage detection circuit for detecting a voltage value applied to the power storage device; and a communication control unit including a control circuit for generating a selection signal based on the detected current value and the detected current voltage, a plurality of switches to be turned on or off by the selection signal, and passive elements electrically connected to the plurality of switches.
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