公开(公告)号：US09549142B2

公开(公告)日：2017-01-17

申请号：US14497975

申请日：2014-09-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Tsuyoshi Ikushima ,  Osamu Shibata ,  Hiroshi Tanaka

IPC: H04N5/40 ,  H04L25/49 ,  H04L27/02

CPC classification number: H04N5/40 ,  H04L25/4908 ,  H04L25/4917 ,  H04L27/02

Abstract: A video data transmitter apparatus generates and transmits a multi-value amplitude modulation signal by performing a multi-value amplitude modulation of a plurality of N bits per one symbol according to video data of a video signal or a color signal constituting the video signal, or a brightness signal and a color-difference signal. A data separator portion separates the video data into first to N-th pixel data, a difference calculator portion calculates (N−1) pieces of predetermined difference information based on the separated first to N-th pixel data, and a multi-value amplitude modulator portion performs a multi-value modulation so that predetermined N-bit data corresponds to a multi-value signal level closest to an intermediate level having an intermediate value between a maximum level and a minimum level of the multi-value signal level of the multi-value amplitude modulation signal.

Abstract translation: 视频数据发送装置根据构成视频信号的视频信号或彩色信号的视频数据，通过对每一符号的多个N比特进行多值幅度调制，生成并发送多值幅度调制信号，或者 亮度信号和色差信号。 数据分离部将视频数据分割为第1〜第N像素数据，差分运算部基于分离的第1至第N像素数据计算（N-1）个预定差分信息， 调制器部分执行多值调制，使得预定的N位数据对应于最接近中间电平的多值信号电平，该中间电平具有多值信号电平的最大电平和最小电平之间的中间值 值调幅信号。

公开(公告)号：US10983174B2

公开(公告)日：2021-04-20

申请号：US16462226

申请日：2017-11-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tsuyoshi Ikushima ,  Naoki Fukuo ,  Tomokazu Nishigaki

IPC: G01R31/02 ,  G01R31/50 ,  H03K19/20

Abstract: An excitation unit applies, to an excitation coil, an excitation voltage with a voltage level alternately changing between a first high voltage value higher than a reference voltage value and a first low voltage value lower than the reference voltage value. The excitation unit includes a comparison circuit and a voltage switching circuit. The comparison circuit outputs a comparison signal having a voltage level switching between a high level and a low level depending on whether a detection voltage is greater than, or equal to or less than, a threshold voltage. The voltage switching circuit switches the voltage level of the excitation voltage between the first high voltage value and the first low voltage value according to the voltage level of the comparison signal.

公开(公告)号：US10396544B2

公开(公告)日：2019-08-27

申请号：US15563934

申请日：2016-03-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Eiji Iwami ,  Tsuyoshi Ikushima ,  Naoki Fukuo ,  Tomokazu Nishigaki

IPC: G01R15/18 ,  H02H3/16 ,  G01R19/165 ,  G01R19/20 ,  G01R31/02 ,  H02H3/00 ,  H02H3/33 ,  G01R15/04

Abstract: A magnetic core is electromagnetically coupled to two conductors that allow an AC current to flow through. An exciter is configured to supply a winding with an excitation current that is an alternating current. A current detector is configured to detect a current flowing through the winding. A DC component detector is configured to detect a DC component level from the current detected with the current detector. Two contact elements are respectively disposed along the two conductors. A discrimination controller is configured to: turn the two contact elements on when the DC component level detected with the DC component detector is less than or equal to a threshold; turn the two contact elements off when the DC component level detected with the DC component detector is greater than the threshold; and turn the two contact elements off in de-energized condition.

公开(公告)号：US10809312B2

公开(公告)日：2020-10-20

申请号：US16462233

申请日：2017-11-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tsuyoshi Ikushima ,  Tomokazu Nishigaki ,  Naoki Fukuo

IPC: G01R31/02 ,  G01R15/18 ,  G01R19/165 ,  G01R31/50 ,  H03K19/20

Abstract: A first decision unit of an AC leakage detection section outputs a first output signal with a signal level depending on the level of a corrected first voltage signal output from a correction unit relative to a first threshold value. An excitation unit of a DC leakage detection section applies, to an excitation coil, an excitation voltage having an excitation frequency. A DC component detection unit outputs a second voltage signal representing magnitude of a DC component of the voltage obtained by a current-detecting resistor. A second decision unit outputs a second output signal having a voltage level depending on the level of the second voltage signal relative to a second threshold value. The DC leakage detection section includes a low-pass filter provided between an input terminal electrically connected to a connection point between the excitation coil and the current-detecting resistor and the excitation coil.