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1. 发明专利

JP2014057179A Network device 有权
标题翻译：网络设备
公开(公告)号：JP2014057179A
公开(公告)日：2014-03-27
申请号：JP2012200079
申请日：2012-09-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITOKAWA NAOKI , MITSUNAGA DAIJI , NAKANISHI AKIYUKI , KAMIJO KAKU
IPC分类号： H04L7/00 , H04L12/28 , H04L12/70
摘要： PROBLEM TO BE SOLVED: To solve such a problem that, in a network device having time synchronous function of a packet base, since the rate of time synchronous packet transmission/reception is required in a good amount on the condition in which high synchronous accuracy is required, the traffic of a main signal is oppressed.SOLUTION: When it is detected that a time error of time synchronization by a packet transmission/reception is converged within a preset upper limit value and that a reception clock by synchronous Ethernet is proper, a slave has a time synchronous packet transmission/reception necessity determination control part which performs an instruction so as to transmit stop request of the time synchronous packet transmission/reception to a master.
摘要翻译：要解决的问题为了解决在具有分组基站的时间同步功能的网络设备中，由于在高同步精度为高的条件下需要时间同步分组发送/接收的时间量很多的问题主要信号的流量被压缩。解决方案：当检测到通过分组发送/接收的时间同步的时间误差被收敛在预设的上限值内并且通过同步以太网的接收时钟是适当的时从设备具有时间同步分组发送/接收必要性确定控制部分，其执行指令以便向主机发送时间同步分组发送/接收的停止请求。

2. 发明专利

JP2014032055A Communication system 有权
标题翻译：通讯系统
公开(公告)号：JP2014032055A
公开(公告)日：2014-02-20
申请号：JP2012171603
申请日：2012-08-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KAMIJO KAKU , ITOKAWA NAOKI , KAWASE TOKUICHI
IPC分类号： G04G5/00 , H04L7/00
摘要： PROBLEM TO BE SOLVED: To solve a problem associated with a system including two or more slave devices connected to a single master apparatus, where PTP packets transmitted from the slave devices to the master apparatus are respectively transmitted with respective timings of individual slave devices to the master apparatus regardless of statuses in the master apparatus and other slave devices or in traffic, causing the possibility of congestion in processing due to concentration of packets to increase with increase in the number of connected slave devices and a loss of packets necessary for clock-time synchronization between the master apparatus and the slave devices, further causing a loss of clock-time information that is to be transmitted and deterioration in the accuracy of the clock-time synchronization.SOLUTION: The slave device adjusts timing of transmitting a PTP packet to a master apparatus, preventing congestion in processing due to concentration of PTP packets transmitted from two or more connected slave devices and maintaining accuracy of clock-time synchronization.
摘要翻译：要解决的问题：为了解决与包括连接到单个主设备的两个或更多个从设备的系统相关联的问题，其中从从设备发送到主设备的PTP分组分别以各个从设备的相应定时发送到主设备，而不管主设备和其他从设备中或业务中的状态如何，导致由于分组集中而导致的处理中的拥塞的可能性随着连接的从设备的数量的增加而增加以及时钟时间所需的分组丢失主设备和从设备之间的同步，进一步造成将被发送的时钟时间信息的丢失和时钟 - 时间同步精度的劣化。解决方案：从设备调整将PTP分组传送到主设备，防止由于PTP分组的聚集引起的处理中的拥塞两个或更多连接的从设备，并保持时钟同步的准确性。

3. 发明专利

JP2013243651A Time information transmitter 有权
标题翻译：时间信息发送器
公开(公告)号：JP2013243651A
公开(公告)日：2013-12-05
申请号：JP2013084464
申请日：2013-04-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KAWASE TOKUICHI , UMEMATSU KAZUYORI , KONNO SATOSHI , ITOKAWA NAOKI
IPC分类号： H04L7/00 , H04L12/70 , H04L12/713 , H04W56/00
CPC分类号： Y02D70/00
摘要： PROBLEM TO BE SOLVED: To minimize the time during which a transmitter is brought into free-running state and suppress power consumption when switching an operation system and a standby system, with regard to the system switching system of a redundant constitution of the transmitter configuring a time synchronous network.SOLUTION: In a time synchronous network, a packet transmitter (downstream) 20 includes a function capable of extracting time information, configuration information and operation information from a PTP message and storing the information thus extracted. When switching from an operation system 21a to a standby system 21b, these pieces of information are delivered from the operation system 21a to the standby system 21b thus omitting a sequence required after system switching, shortening the time when the packet transmitter (downstream) 20 is in free-running state, and minimizing degradation in time synchronization accuracy. Furthermore, power consumption is suppressed by bringing the majority of the function of the standby system 21b into sleep state during normal operation.
摘要翻译：要解决的问题：为了最小化发射机进入自由运行状态的时间并且在切换操作系统和备用系统时抑制功耗，关于发射机的冗余结构的系统交换系统时间同步网络。解决方案：在时间同步网络中，分组发送器（下游）20包括能够从PTP消息中提取时间信息，配置信息和操作信息并存储由此提取的信息的功能。当从操作系统21a切换到备用系统21b时，这些信息从操作系统21a传送到备用系统21b，从而省略了系统切换后所需的序列，缩短了分组发送器（下游）20的时间处于自由运行状态，并使时间同步精度降低最小化。此外，通过在正常操作期间使备用系统21b的功能的大部分进入睡眠状态来抑制功耗。

4. 发明专利

JP2012249056A Passive optical network system and its transmission control method 审中-公开
标题翻译：被动光网络系统及其传输控制方法
公开(公告)号：JP2012249056A
公开(公告)日：2012-12-13
申请号：JP2011118859
申请日：2011-05-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA MAKI , ITOKAWA NAOKI , KAZAWA TORU , TAKAGI SHOTA , TANAKA TAKUHIRO , SATO TAKU
IPC分类号： H04L12/44 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To provide an ONU that prevents an unintended optical signal (false light emission) from occurring when shifting from or to a power saving mode.SOLUTION: A passive optical network (PON) system is comprised of an OLT and an ONU, and the OLT controls the ONU to shift to or from a sleep state. The ONU comprises: a signal transmission and reception unit for communicating with a communication terminal; an optical-electrical conversion unit for communicating with the OLT by an optical signal; a PON LSI for controlling data communication while the ONU is in operation and in a sleep period; a sleep control signal processing unit for analyzing a sleep control signal transmitted by the OLT; a sleep state control unit for controlling a shift to or from the sleep state; an optical switch for blocking or letting through an optical signal of the optical signal transmission unit; and an optical switch control unit for controlling the optical switch to block or let through.
摘要翻译：要解决的问题：提供一种防止在从省电模式转换到节电模式时发生意外的光信号（假发光）的ONU。解决方案：无源光网络（PON）系统由OLT和ONU组成，OLT控制ONU转移到睡眠状态或从睡眠状态转移。 ONU包括：用于与通信终端通信的信号发送和接收单元; 光电转换单元，用于通过光信号与OLT进行通信; 一个PON LSI，用于在ONU处于运行状态并在睡眠期间控制数据通信; 睡眠控制信号处理单元，用于分析由OLT发送的睡眠控制信号; 睡眠状态控制单元，用于控制到睡眠状态或从睡眠状态的移动; 光开关，用于阻断或通过光信号传输单元的光信号; 以及光开关控制单元，用于控制光开关阻塞或通过。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2012222524A Network device 有权
标题翻译：网络设备
公开(公告)号：JP2012222524A
公开(公告)日：2012-11-12
申请号：JP2011084856
申请日：2011-04-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITOKAWA NAOKI , NAKANISHI AKIYUKI
IPC分类号： H04L12/44 , H04L7/00
摘要： PROBLEM TO BE SOLVED: To adjust the MASTER/SLAVE relation of PHY to the master-servant relation of clock distribution only in a synchronous Ethernet network with 1000BASE-T, without generating link disconnection more than necessary.SOLUTION: At device start-up, PHY of a 1000BASE-T port is set to a multiport device. After ESMC is received, PHY is set so as to match the master-servant relation of clock distribution. If it already matches, the state is not changed but maintained.
摘要翻译：要解决的问题：只有在具有1000BASE-T的同步以太网网络中，才能将PHY的MASTER / SLAVE关系调整为时钟分配的主服务关系，而不会产生超出必要的链路断开连接。
解决方案：在设备启动时，1000BASE-T端口的PHY设置为多端口设备。在接收到ESMC之后，将PHY设置为与时钟分配的主服务关系相匹配。如果它已经匹配，则状态不会更改但是保持状态。版权所有（C）2013，JPO＆INPIT

6. 发明专利

JP2010032593A Drive method for plasma display panel 审中-公开
标题翻译：等离子显示面板的驱动方法
公开(公告)号：JP2010032593A
公开(公告)日：2010-02-12
申请号：JP2008191910
申请日：2008-07-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MATSUOKA HIROKI , ITOKAWA NAOKI
IPC分类号： G09G3/20 , G09G3/288 , G09G3/291 , G09G3/292 , G09G3/294 , G09G3/296 , G09G3/298
摘要： PROBLEM TO BE SOLVED: To provide a drive method for a plasma display panel performing stable normal display regardless whether the temperature of a panel tube face is high or low.
SOLUTION: If a temperature detected by a temperature detecting means is higher than a predetermined temperature Ta during a maintenance discharge period right before a reset period for an on-cell reset, a first maintenance discharge waveform is used. The first maintenance discharge waveform finishes the maintenance discharge period by applying maintenance pulses 55a and 55b so that a scanning electrode and a maintenance electrode are used as an anode and a cathode, respectively. If the temperature is lower than the predetermined temperature Ta, a second maintenance discharge waveform is used. The second maintenance discharge waveform finishes the maintenance discharge period by applying maintenance pulses 56a and 56b so that the maintenance electrode and the scanning electrode are used as the anode and the cathode, respectively, and then by applying the maintenance electrode adjustment pulse 57b of a waveform that gradually drops to the maintenance electrode.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种执行稳定正常显示的等离子体显示面板的驱动方法，而不管面板管面的温度是高还是低。解决方案：如果在针对单元电池复位的复位周期之前的维护放电期间，由温度检测装置检测到的温度高于预定温度Ta，则使用第一维持放电波形。第一维护放电波形通过施加维护脉冲55a和55b来完成维护放电周期，从而分别使用扫描电极和维护电极作为阳极和阴极。如果温度低于预定温度Ta，则使用第二维持放电波形。第二维护放电波形通过施加维护脉冲56a和56b来完成维护放电周期，使维护电极和扫描电极分别用作阳极和阴极，然后通过施加维持电极调节脉冲57b的波形逐渐下降到维护电极。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JP2009128721A Plasma display device and driving method thereof 审中-公开
标题翻译：等离子体显示装置及其驱动方法
公开(公告)号：JP2009128721A
公开(公告)日：2009-06-11
申请号：JP2007305013
申请日：2007-11-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIBATA MASAYUKI , ITOKAWA NAOKI , ITO KATSUMI , MISAWA TOMOYA
IPC分类号： G09G3/20 , G09G3/28 , G09G3/288 , G09G3/291 , G09G3/292 , G09G3/298
摘要： PROBLEM TO BE SOLVED: To provide a plasma display device capable of achieving interlace drive with one-line display and interlace drive with two-line display while switching both kinds of interlace drives without deteriorating display quality.
SOLUTION: In the plasma display device, the interlace drive with one-line display is performed by applying a sustain pulse to an even display line or an odd display line on the plasma display device on each frame, and the interlace drive with two-line display is performed by writing the same data while making the even display line and odd display line which are adjacent to each other upwards and downwards, and applying a sustain pulse. Therein, the interlace drive with one-line display and the interlace drive with two-line display are achieved such that resetting of all cells is performed one time per unit time when the interlace drive with two-line display is performed, thereby, the increase of the number of times of the resetting of all cells in the two-line display is suppressed and, as the result, the increase of background luminance can be prevented.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种等离子体显示装置，其能够在不会降低显示质量的同时切换两种隔行扫描驱动器，从而实现具有双行显示的单行显示和隔行扫描的隔行驱动。解决方案：在等离子体显示装置中，通过在每帧上对等离子体显示装置上的偶数显示线或奇数显示行施加维持脉冲来执行具有单行显示的交错驱动，并且将隔行驱动与通过在使相互相邻的偶数显示线和奇数显示线向上和向下并且施加维持脉冲的同时写入相同的数据来执行双线显示。其中，实现了具有单行显示的隔行驱动和具有双行显示的交错驱动，使得当执行具有双行显示的交错驱动时，每单位时间执行一次所有单元的复位，从而增加抑制双线显示中的所有单元的复位次数，结果可以防止背景亮度的增加。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2009128384A Plasma display device 审中-公开
标题翻译：等离子体显示设备
公开(公告)号：JP2009128384A
公开(公告)日：2009-06-11
申请号：JP2007299707
申请日：2007-11-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA MAKI , HASHIMOTO YASUNOBU , KISHI TOMOKATSU , ITO KATSUMI , ITOKAWA NAOKI
IPC分类号： G09G3/20 , G09G3/288 , G09G3/291 , G09G3/294 , G09G3/296 , G09G3/298 , H04N5/66
摘要： PROBLEM TO BE SOLVED: To provide a plasma display device capable of restraining erroneous discharge in a sustain period so as to materialize an interlace drive without complicating a circuit configuration.
SOLUTION: Switches SW1, SW2 are disposed between a sustain circuit 23 of outputting a sustain pulse and scan circuits 21, 22 of driving Y electrodes, Y electrodes of even display lines and Y electrodes of add display lines can be controlled independently into a high impedance state, moreover, the Y electrode is made into the high impedance state in such a voltage state as to perform the final sustain discharge in the first sustain period and, thereby, discharges of even display lines can be restrained in second sustain periods of odd frames, discharges of odd display lines can be restrained in second sustain periods of even frames, and erroneous discharge in a second sustain period can be restrained.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供能够抑制维持期间的错误放电的等离子体显示装置，以实现交错驱动而不使电路结构复杂化。解决方案：开关SW1，SW2设置在输出维持脉冲的维持电路23和驱动Y电极的扫描电路21,22之间，偶数显示行的Y电极和加法显示行的Y电极可独立控制高阻抗状态，并且在第一维持期间进行最终维持放电的电压状态下使Y电极成为高阻抗状态，从而可以抑制第二维持期间的偶数显示行的放电奇数帧的奇数显示行的放电可以被抑制在偶数帧的第二维持周期中，并且可以抑制第二维持周期中的错误放电。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2009042391A Plasma display apparatus and method for driving plasma display panel 审中-公开
标题翻译：等离子体显示装置和驱动等离子体显示面板的方法
公开(公告)号：JP2009042391A
公开(公告)日：2009-02-26
申请号：JP2007205710
申请日：2007-08-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEUCHI MASANORI , HASHIMOTO YASUNOBU , OKI HIDEAKI , KIMURA YUICHIRO , ITOKAWA NAOKI , NOGUCHI TAIJI
IPC分类号： G09G3/288 , G09G3/20 , G09G3/28 , G09G3/291 , G09G3/294 , G09G3/298 , G09G3/299 , H04N5/66
CPC分类号： G09G3/299 , G09G3/2044 , G09G3/2059 , G09G3/296 , G09G2310/0224 , G09G2310/0245 , G09G2320/0266 , G09G2320/041 , G09G2330/045 , G09G2360/16
摘要： PROBLEM TO BE SOLVED: To provide a plasma display apparatus and a method for driving a plasma display panel by which luminance is improved while preventing decrease in resolution.
SOLUTION: The plasma display apparatus displays an interlace signal and is equipped with: a maximum sustain pulse number counting means 61 configured to count the maximum number of sustain pulses associated with emission of light that can be made within one field, based on the vertical synchronization signal frequency of the input signal; a display load factor calculating means 50 configured to calculate a display load factor of the input signal in the one field; a target sustain pulse number determining means 62 configured to determine the target number of sustain pulses for the one field based on the display load factor calculated by the display load factor calculating means; and an emission luminance ratio determining means 63 configured to determine the emission luminance ratio of a sub-display line to a main-display line in the one field based on a relationship between the target number of sustain pulses determined by the target sustain pulse number determining means and the maximum number of sustain pulses.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供等离子体显示装置和驱动等离子体显示面板的方法，通过该等离子体显示装置提高亮度，同时防止分辨率的降低。解决方案：等离子体显示装置显示交错信号，并配备有：最大维持脉冲数计数装置61，其被配置为基于可在一个场内进行的与光发射相关联的最大维持脉冲数量，基于输入信号的垂直同步信号频率; 被配置为计算一个场中的输入信号的显示负载因子的显示负载率计算装置50; 目标维持脉冲数确定装置62，被配置为基于由显示负载因子计算装置计算出的显示负载因子确定一个场的目标维持脉冲数; 以及发光亮度比确定装置63，被配置为基于由目标维持脉冲数确定的目标维持脉冲数之间的关系确定一个场中的副显示线与主显示行的发光亮度比平均值和最大维持脉冲数。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2011023846A Line emulation device 审中-公开
标题翻译：线性仿真器件
公开(公告)号：JP2011023846A
公开(公告)日：2011-02-03
申请号：JP2009165210
申请日：2009-07-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUZUKI KATSUYOSHI , NAKAMURA AKIRA , NAKANISHI AKIYUKI , ITOKAWA NAOKI
IPC分类号： H04L12/46
摘要： PROBLEM TO BE SOLVED: To shorten time during which communication becomes impossible caused by a change in a communication path due to a maintenance work and occurrence of a fault in a line emulation device having redundant configuration of the communication path. SOLUTION: Upon switching of physical ports used for the communication, a frame for updating an MAC (Media Access Control) address learning table for informing another connected device of a change in MAC address of itself is issued. The device which receives the frame for updating updates the learning table based on information on a transmission source MAC address in the frame, does not handle the frame for updating as a user frame, and immediately cancels the frame. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：缩短由于维护工作导致的通信路径的变化以及具有通信路径的冗余配置的线路仿真装置中的故障的发生而导致的通信变得不可能的时间。解决方案：在切换用于通信的物理端口时，发出用于更新MAC（媒体访问控制）地址学习表的帧，用于向另一个连接的设备通知其本身的MAC地址的改变。接收到用于更新的帧的设备基于关于帧中的发送源MAC地址的信息来更新学习表，不处理用于用户帧更新的帧，并且立即取消该帧。版权所有（C）2011，JPO＆INPIT

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