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    • 2. 发明专利
    • Multipoint video conference system and screen arrangement allocation method
    • 多点视频会议系统和屏幕布局分配方法
    • JP2013192139A
    • 2013-09-26
    • JP2012058341
    • 2012-03-15
    • Hitachi Ltd株式会社日立製作所
    • HASHIMOTO TAKAYUKIKATO HIROTOSHI
    • H04N7/15
    • PROBLEM TO BE SOLVED: To separate sound images at two points of speaking times being close to each other.SOLUTION: A server device is comprised of a voice relay section which adds speech presence information to voice data received from conference terminals and transmits the data to the conference terminals, and a video relay section which relays video data from the conference terminals and transmits the data to the conference terminals. Each conference terminal includes an image display section which displays images comprised of video signals obtained from video data in a plurality of display regions on a screen as conference screens at different points, and a video data processing section which allocates the video data to the display regions. The video data processing section measures a speech time of a conference participant in the conference terminal at each point based on the voice data obtained from the terminal and allocates, based on a measurement result, video data obtained from conference terminals at a plurality of points where conference participants having speech times being close to each other are present, to display regions in positions separated from each other.
    • 要解决的问题:将两个说话时间彼此靠近的声像分开。解决方案:服务器设备包括语音中继部分,其将语音存在信息添加到从会议终端接收的语音数据,并将数据发送到 会议终端,以及视频中继部,其从会议终端中继视频数据,并将数据发送到会议终端。 每个会议终端包括图像显示部分,其将在视频数据中获取的视频信号的视频信号显示在不同点的会议屏幕上的视频数据处理部分,视频数据处理部分将视频数据分配给显示区域 。 视频数据处理部基于从终端得到的语音数据,测定会议终端的会议参与者的会话时间,并根据测定结果,从会议终端得到的多个点分配视频数据, 存在具有彼此接近的语音时间的会议参与者,以显示彼此分离的位置的区域。
    • 3. 发明专利
    • Drive circuit and inverter device for voltage-driven semiconductor element
    • 用于电压驱动的半导体元件的驱动电路和逆变器装置
    • JP2009021823A
    • 2009-01-29
    • JP2007182738
    • 2007-07-12
    • Hitachi Ltd株式会社日立製作所
    • HASHIMOTO TAKAYUKIHIRAO TAKASHISHIRAISHI MASAKI
    • H03K17/695H02M1/08H02M7/537H03K17/30
    • H02M3/07H02M1/08H02M7/5387H02M2003/071
    • PROBLEM TO BE SOLVED: To provide a drive circuit for voltage-driven semiconductor elements, which prevents false-arcing problems using an only positive voltage power supply without increasing conduction power loss, and an inverter device. SOLUTION: The drive circuit which drives semiconductor elements has a first switch connected to the positive side of a direct current power supply, a second switch connected to another terminal of the first switch and to the negative side of the direct current power supply, a third switch connected to the positive side of the direct current power supply, a fourth switch connected to another terminal of the third switch, a fifth switch connected to another terminal of the fourth switch and to the negative side of the direct current power supply, and a capacitor connected to the other terminal of the first switch and the other terminal of the fourth switch. The gate of a semiconductor element is connected to the other terminal of the third switch, and the source of the semiconductor element is connected to the negative side of the direct current power supply. Thereby, a negative voltage can be applied to the gate of the semiconductor element using an only positive voltage power supply. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种用于电压驱动的半导体元件的驱动电路,其防止仅使用正电压电源而不增加导通功率损耗的假电弧问题,以及逆变器装置。 解决方案:驱动半导体元件的驱动电路具有连接到直流电源的正极的第一开关,连接到第一开关的另一个端子和直流电源的负极的第二开关 连接到直流电源的正极的第三开关,连接到第三开关的另一个端子的第四开关,连接到第四开关的另一个端子和直流电源的负极的第五开关 以及连接到第一开关的另一端子和第四开关的另一端子的电容器。 半导体元件的栅极连接到第三开关的另一个端子,并且半导体元件的源极连接到直流电源的负极侧。 因此,可以使用仅正电压电源将负电压施加到半导体元件的栅极。 版权所有(C)2009,JPO&INPIT
    • 4. 发明专利
    • Elevator device
    • 电梯装置
    • JP2008290831A
    • 2008-12-04
    • JP2007137043
    • 2007-05-23
    • Hitachi Ltd株式会社日立製作所
    • NITTA KOJISEKINE KAZUHISATOBA TAKAHISAHASHIMOTO TAKAYUKI
    • B66B7/06
    • PROBLEM TO BE SOLVED: To provide an elevator device capable of reducing influence of biased load generated by a suspension body without providing a special driving means.
      SOLUTION: This elevator device is provided with a pair of upper part guide means 6 disposed in an upper part of an elevating body frame 3 to slide and move along a guide rail 5, a movable bottom frame provided to be movable in the vertical direction via a supporting means in a lower part of the elevating body frame 3, a pair of lower part guide means 8 disposed in the movable bottom frame to slide and move along the guide rail 5, the suspension body connected to the movable bottom frame, and a recovery means for imparting recovery force to the movable bottom frame. A gap dimension between the upper part guide means 6 and the lower part guide means 8 is increased by making the movable bottom frame movable downward by suspension load of the suspension body according to a rise of the elevating body frame 3, and the movable bottom frame is made movable upward by the recovery means according to lowering of the elevating body frame 3.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种能够减少由悬架体产生的偏置负载的影响而不提供特殊驱动装置的电梯装置。 解决方案:该电梯装置设置有一对上部引导装置6,其设置在升降体框架3的上部,以沿着导轨5滑动和移动;可移动底框, 通过升降体框架3的下部中的支撑装置垂直方向;一对下部引导装置8,其设置在可移动底架中,以沿着导轨5滑动和移动;悬挂体连接到可移动底架 以及用于向可移动底框架施加恢复力的恢复装置。 通过根据升降体框架3的上升使悬架体的悬挂载荷使可动底框能够向下移动,上部引导装置6和下部引导装置8之间的间隙尺寸增加,并且可移动底架 根据升降体框架3的降低,通过恢复装置向上移动。(C)2009年,JPO和INPIT
    • 8. 发明专利
    • DOOR CONTROL UNIT OF ELEVATOR
    • JP2000351558A
    • 2000-12-19
    • JP16633599
    • 1999-06-14
    • HITACHI LTD
    • EGUCHI KOJIONO YOICHIHASHIMOTO TAKAYUKISAKAMOTO MASAHIRO
    • B66B13/14
    • PROBLEM TO BE SOLVED: To facilitate the returning operation of a door after detection of the fixation of the door by returning an elevator to normal operation when the door opening end or door closing end by the manual opening and closing operation of the door is detected by corresponding means after the output of an abnormal signal, and when the detected motor speed value is zero or less. SOLUTION: When a door open command signal is inputted from an elevator control unit 1 to the arithmetic processing device 21 of a door control unit 2, it is judged whether door actual speed value Vd is zero or not. When no signal is received from a rotary encoder 29, and no door actual speed Vd is present, a failure detection counter is increased, and when the counter reaches a prescribed frequency, a failure detection signal is outputted to lay the elevator in resting state. Thereafter, when a door opening and closing end detecting switch 23 or 33 is operated, or the door is manually moved, the presence of the door speed value is checked, and it is judged that the fixation of the door is solved, when the door speed value is nor zero, to return the elevator from the resting state to general operation.