公开(公告)号：US20160329024A1

公开(公告)日：2016-11-10

申请号：US15146085

申请日：2016-05-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shuhei Maeda

IPC: G09G3/36

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.

Abstract translation: 提供能够降低功耗的显示系统。 显示系统包括成像装置和显示装置。 成像装置包括第一像素，第一电路和第二电路。 第一像素排列成矩阵。 第一电路被配置为检测参考帧的成像数据和差异检测帧的成像数据之间的差异。 第二电路被配置为检测检测到差异的第一像素的行。 显示装置包括第二像素和第三电路。 第三电路选择与由第二电路检测到的第一像素的行对应的第二像素行。 保留在第二像素中的图像数据仅在所选择的行中重写。

公开(公告)号：US09472974B2

公开(公告)日：2016-10-18

申请号：US14481435

申请日：2014-09-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yutaka Shionoiri ,  Koichiro Kamata ,  Misako Sato ,  Shuhei Maeda

IPC: H01F38/00 ,  H02J7/02 ,  H04B5/00 ,  H02J5/00

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J50/20 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B5/0037 ,  H04B5/0093

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. 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 to be supplied with power, 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.

Abstract translation: 本发明的目的是提供一种供电系统和馈电方法，其对于电力接收端的馈电用户更为方便。 本发明的目的是提供一种馈电系统和馈电方法，其还允许馈电供应商（在发电端发电）供电而不浪费电力。 向功率接收器无线供电的供电装置检测供电电源的位置和谐振频率，并根据信息控制发送到电力接收器的电力信号的频率 。 通过以最佳频率向功率接收器发送功率信号以实现高功率传输效率，可以提供有效的馈电服务。

公开(公告)号：US09391674B2

公开(公告)日：2016-07-12

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: H01F27/42 ,  H01F38/00 ,  H01F37/00 ,  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。

公开(公告)号：US20130154556A1

公开(公告)日：2013-06-20

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

IPC: G05F3/08 ,  H02J7/00

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。