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    • 51. 发明授权
    • Method for arranging signal points in a quadrature amplitude
modulation/demodulation system
    • 用于在正交幅度调制/解调系统中布置信号点的方法
    • US5515400A
    • 1996-05-07
    • US80510
    • 1992-12-02
    • Yasuhiro Arai
    • Yasuhiro Arai
    • H04L27/34H04L5/12
    • H04L27/3411
    • In a signal point arranging method for use with a quadrature amplitude modulator/demodulator device in which a desired number of signal points are arranged on a rectangular plane, a plurality of grid points are first set such that they are symmetrical with respect to the rectangular coordinate axes of the rectangular plane and arranged at intervals of a unit distance. Next, a plurality of concentric circles with their center at the coordinate origin of the rectangular plane are set, each of the concentric circles having a radius equal to a distance between the coordinate origin and a grid point. Then, a desired number of signal points are arranged on points of intersection of the grid points, the concentric circles beginning with the circle smallest in radius and continuing with circles of increasing radius. As a result, each of the signal points can be arranged as close to the coordinate origin as possible, thus enabling the peak power of modulated signals to be minimized. In addition, since the distance between signal points can be held constant, the S/N characteristic does not vary with the signal points and a constant transmission error rate can be secured. As a result, a signal point arrangement is obtained which enables data transmission at minimum required power, reduces transmission error rate and minimizes the S/N characteristic.
    • 在与正交幅度调制器/解调器装置一起使用的信号点排列方法中,其中期望数量的信号点被布置在矩形平面上,首先设置多个网格点,使得它们相对于矩形坐标对称 矩形平面的轴线并以单位距离的间隔布置。 接下来,设置在矩形平面的坐标原点处具有中心的多个同心圆,每个同心圆具有等于坐标原点与网格点之间的距离的半径。 然后,将所需数量的信号点布置在网格点的交叉点上,以半径最小的圆形开始的同心圆并且继续增加半径的圆。 结果,每个信号点可以尽可能靠近坐标原点布置,从而使调制信号的峰值功率最小化。 此外,由于信号点之间的距离可以保持不变,所以S / N特性不随信号点变化,并且可以确保恒定的传输错误率。 结果,获得信号点布置,其使得能够以最小所需功率进行数据传输,降低传输错误率并使S / N特性最小化。
    • 53. 发明授权
    • MODEM communication system having training means and method for training
same
    • 具有训练手段和训练方法的MODEM通信系统
    • US4868850A
    • 1989-09-19
    • US870499
    • 1986-06-04
    • Takashi KakuYasuhiro Arai
    • Takashi KakuYasuhiro Arai
    • H04B3/10H04L7/027H04L7/04H04L25/03H04L27/01H04L27/38
    • H04L27/38H04L25/03133H04L7/027H04L2025/03783H04L7/046
    • A multipoint type MODEM communication system having a training device for adapting receiving parameters in a receiving MODEM to a characteristic of a telephone line connected to a sending MODEM in response to a training signal sent from the sending MODEM prior to the reception of data. The training signal includes a tone for gain control, a timing signal for pull-in synchronization, and at least two impulses for equalization and carrier phase control, which are superimposed on each other. A time between the first and the last impulses defines the characteristic of the telephone line which should be adjusted in the receiving MODEM.Additional guard impulses may be added prior to and/or after the impulses. A scramble signal also may be added after the impulses.In addition, a method for training the receiving MODEM is disclosed.
    • 一种多点式MODEM通信系统,具有训练装置,用于响应于在接收数据之前从发送MODEM发送的训练信号,将接收MODEM中的接收参数适应于连接到发送MODEM的电话线路的特性。 训练信号包括用于增益控制的音调,用于拉入同步的定时信号和用于均衡和载波相位控制的至少两个脉冲,它们彼此叠加。 第一个和最后一个脉冲之间的时间定义了在接收MODEM中应该调整的电话线的特性。 在脉冲之前和/或之后可以添加额外的保护脉冲。 在脉冲之后也可以加扰乱信号。 此外,公开了一种训练接收MODEM的方法。
    • 56. 发明授权
    • Method for driving plasma display panel, and plasma display device
    • 用于驱动等离子体显示面板的方法和等离子体显示装置
    • US08232983B2
    • 2012-07-31
    • US12515349
    • 2008-03-27
    • Kenji OgawaKeiji AkamatsuYasuhiro Arai
    • Kenji OgawaKeiji AkamatsuYasuhiro Arai
    • G06F3/038G09G3/28G09G3/00G09G1/06
    • G09G3/296G09G3/293G09G2300/0426G09G2310/0216G09G2310/0218G09G2330/04
    • In the method for driving a plasma display panel and the plasma display device, the scan electrodes of the plasma display panel are divided into two scan electrode groups, the address period of subfields is divided into two address periods corresponding to the two scan electrode groups, and at least in one address period, the scan electrodes belonging to the scan electrode group provided with scan pulses are sequentially provided with scan pulses shifting from second voltage higher than scan pulse voltage to scan pulse voltage and shifting again to second voltage, and the scan electrodes belonging to the scan electrode group not provided with scan pulses are provided with either third voltage higher than scan pulse voltage or fourth voltage higher than second voltage and third voltage, and with third voltage at least while scan pulse voltage is applied to adjacent scan electrodes.
    • 在驱动等离子体显示面板和等离子体显示装置的方法中,将等离子体显示面板的扫描电极分成两个扫描电极组,子场的寻址周期被划分为与两个扫描电极组对应的两个寻址周期, 并且至少在一个寻址周期中,属于设置有扫描脉冲的扫描电极组的扫描电极被顺序地设置有从扫描脉冲电压高于扫描脉冲电压的第二电压移位到第二电压的扫描脉冲,并且扫描 属于没有扫描脉冲的扫描电极组的电极设置有比扫描脉冲电压高的第三电压或高于第二电压和第三电压的第四电压,并且至少在扫描脉冲电压施加到相邻的扫描电极时具有第三电压 。
    • 57. 发明授权
    • Plasma display panel drive circuit and plasma display apparatus
    • 等离子显示面板驱动电路和等离子显示装置
    • US07915832B2
    • 2011-03-29
    • US11817354
    • 2006-02-08
    • Yasuhiro AraiHideki NakataToshikazu NagakiSatoshi Ikeda
    • Yasuhiro AraiHideki NakataToshikazu NagakiSatoshi Ikeda
    • G09G3/10
    • G09G3/2965G09G3/2927G09G2310/066
    • A drive circuit for driving a plasma display panel (PDP) includes a pulse voltage generator that contains main switching elements disposed on a high voltage side and on a low voltage side, is operable to generate a pulse voltage by operating the main switching elements in accordance with an output voltage from a first power supply and apply the pulse voltage to a PDP scan electrode and sustain electrode, and a reset voltage generator operable to generate a reset voltage in accordance with an output voltage from a second power supply and apply it to the PDP. The pulse voltage generator contains a first diode that prevents the voltage output by the reset voltage generator from being applied backward to the first power supply and a first switching element connected to the first diode in parallel.
    • 用于驱动等离子体显示面板(PDP)的驱动电路包括脉冲电压发生器,其包含设置在高压侧和低电压侧的主开关元件,其可操作以通过根据主开关元件操作来产生脉冲电压 具有来自第一电源的输出电压并将脉冲电压施加到PDP扫描电极和维持电极;以及复位电压发生器,其可操作以根据来自第二电源的输出电压产生复位电压并将其施加到 PDP。 脉冲电压发生器含有第一二极管,其防止复位电压发生器的电压输出向后施加到第一电源,并且第一开关元件并联连接到第一二极管。
    • 58. 发明申请
    • METHOD OF DRIVING PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS
    • 驱动等离子显示面板的方法和等离子显示装置
    • US20100321371A1
    • 2010-12-23
    • US12671392
    • 2009-06-04
    • Satoshi KominamiToshikazu WakabayashiMasumi IzuchiJunko MatsushitaYasuhiro AraiHiroyasu Makino
    • Satoshi KominamiToshikazu WakabayashiMasumi IzuchiJunko MatsushitaYasuhiro AraiHiroyasu Makino
    • G09G5/00
    • G09G3/2965G09G3/2927G09G3/2942G09G2310/066
    • A method of driving a plasma display panel of the present invention, is a driving method of a display panel including plural display electrode pairs (24) each including a scan electrode (22) and a sustain electrode (23) extending along each other, plural data electrodes (32) crossing the plural display electrode pairs (24) and discharge cells respectively formed at positions where the display electrode pairs (24) and the data electrodes (32) cross each other. The method comprises applying a last sustain pulse to the scan electrode (22) in a sustain period when a sustain voltage pulse is applied alternately to the scan electrode (22) and to the sustain electrode (23); then applying to the scan electrode (22) a first ramp voltage having a first ramp waveform which is opposite in polarity to the last sustain voltage pulse; and applying to the sustain electrode (23) a second ramp voltage having a second ramp waveform which is opposite in polarity to the first ramp voltage such that before one of the first and second ramp waveforms reaches a predetermined voltage and finishes rising, the other of the first and second ramp waveforms starts rising.
    • 驱动本发明的等离子体显示面板的方法是具有多个显示电极对(24)的显示面板的驱动方法,每个显示电极对(24)包括彼此延伸的扫描电极(22)和维持电极(23),多个 与多个显示电极对(24)交叉的数据电极(32)和分别形成在显示电极对(24)和数据电极(32)交叉的位置处的放电单元。 该方法包括:在将维持电压脉冲交替施加到扫描电极(22)和维持电极(23)的维持期间,向扫描电极(22)施加最后的维持脉冲; 然后向扫描电极(22)施加具有与最后维持电压脉冲极性相反的第一斜坡波形的第一斜坡电压; 向所述维持电极施加第二斜坡电压,所述第二斜坡电压具有与所述第一斜坡电压极性相反的第二斜坡波形,使得在所述第一和第二斜坡波形中的一个达到预定电压并且完成上升之前,另一个 第一和第二斜坡波形开始上升。
    • 60. 发明申请
    • Method for driving plasma display panel and plasma display apparatus
    • 驱动等离子体显示面板和等离子体显示装置的方法
    • US20090244053A1
    • 2009-10-01
    • US12308055
    • 2007-06-06
    • Keiji AkamatsuToshikazu WakabayashiYasuhiro AraiMitsuhiro Murata
    • Keiji AkamatsuToshikazu WakabayashiYasuhiro AraiMitsuhiro Murata
    • G06F3/038G09G3/28
    • G09G3/2927G09G3/2092G09G3/298G09G2310/0216G09G2310/0267
    • An object of the present invention is to provide a method for driving a plasma display panel capable of further reducing an address error to realize satisfactory image quality, and a plasma display apparatus.The method for driving the plasma display panel according to the present invention includes the steps of: grouping a plurality of scan electrodes into two scan electrode groups on odd-numbered rows and on even-numbered rows; dividing an address period of each of sub-field periods into first and second sub-periods (Ta, Tb) to which the scan electrode groups are assigned, respectively; sequentially selecting the scan electrode by applying a selective potential (Vb) or a first non-selective potential (Vs) to the scan electrode of each scan electrode group in each sub-period (Ta, Tb); applying an address potential (Vw) to a data electrode (D1 to Dm) to be selected in sync with the selection of the scan electrode; setting a time (Ta) during which the selective potential (Vb) is applied in the first sub-period (Ta) to be shorter than a time (Tb) during which the selective potential (Vb) is applied in the second sub-period (Tb); and applying in the first sub-period (Ta) a second non-selective potential (Vx) higher than the first non-selective potential (Vs) to the scan electrode group assigned to the second sub-period (Tb).
    • 本发明的目的是提供一种用于驱动能够进一步减少地址误差以实现令人满意的图像质量的等离子体显示面板的方法和等离子体显示装置。 根据本发明的用于驱动等离子体显示面板的方法包括以下步骤:将多个扫描电极分组成奇数行和偶数行上的两个扫描电极组; 将每个子场周期的寻址周期分别分别分配给扫描电极组的第一和第二子周期(Ta,Tb); 通过对每个子期间(Ta,Tb)中的每个扫描电极组的扫描电极施加选择电位(Vb)或第一非选择电位(Vs)来顺序选择扫描电极; 对扫描电极的选择同步地选择与数据电极(D1〜Dm)进行选择的地址电位(Vw); 将在第一子周期(Ta)中施加选择电位(Vb)的时间(Ta)设定为短于在第二子期间施加选择电位(Vb)的时间(Tb) (Tb); 以及在第一子时段(Ta)中向分配给第二子时段(Tb)的扫描电极组施加高于第一非选择电位(Vs)的第二非选择电位(Vx)。