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    • 1. 发明授权
    • Method of driving plasma display panel, plasma display device and driving device for plasma display panel
    • 驱动等离子体显示面板的方法,等离子体显示装置和等离子体显示面板的驱动装置
    • US06836262B2
    • 2004-12-28
    • US09782292
    • 2001-02-14
    • Takashi HashimotoTakahiro UrakabeAkihiko IwataYoshikazu TsunodaTakayoshi Nagai
    • Takashi HashimotoTakahiro UrakabeAkihiko IwataYoshikazu TsunodaTakayoshi Nagai
    • G09G328
    • G09G3/2927G09G3/296G09G2310/066G09G2320/0228
    • In a reset period, through applying a rectangular pulse (Pya) of positive polarity to an electrode (Y) and applying a CR pulse (Pxa) of negative polarity to an electrode X, a full lighting pulse is applied between the electrodes (X and Y). The application of the voltage is stopped before a CR pulse (Pxc) reaches a final potential, to generate the pulse (Pxa). A full erase pulse (Pxb) made of a CR pulse having a polarity reverse to that of the pulse (Pxa) is applied to the electrode (X). An erase operation reverses the polarity of wall charges accumulated by a full lighting to effectively perform a potential control operation. The potential control pulse (Pxc) is applied to the electrode (X) to generate a discharge, and the state of the wall charges in a discharge cell is controlled by the discharge to generate an optimal amount of wall charges for a subsequent addressing discharge. The final voltage of the pulse (Pxc) is set equal to a voltage (−Vxg) of an address pulse (Pa). Thus, it is possible to generate a plurality of pulses and stabilize an operation of a PDP with a simple constitution.
    • 在复位期间,通过向电极(Y)施加正极性的矩形脉冲(Pya),向电极X施加负极性的CR脉冲(Pxa),在电极(X, Y)。 在CR脉冲(Pxc)达到最终电位之前停止施加电压,以产生脉冲(Pxa)。 将由具有与脉冲(Pxa)相反极性的CR脉冲构成的完全擦除脉冲(Pxb)施加到电极(X)。 擦除操作反转由完全照明积累的壁电荷的极性,以有效地执行电位控制操作。 将电位控制脉冲(Pxc)施加到电极(X)以产生放电,并且通过放电来控制放电单元中的壁电荷的状态,以产生用于随后的寻址放电的最佳量的壁电荷。 将脉冲的最终电压(Pxc)设定为等于寻址脉冲(Pa)的电压(-Vxg)。 因此,可以以简单的结构产生多个脉冲并稳定PDP的操作。
    • 2. 发明授权
    • Method of driving plasma display panel, plasma display device and driving device for plasma display panel
    • 驱动等离子体显示面板的方法,等离子体显示装置和等离子体显示面板的驱动装置
    • US06483250B1
    • 2002-11-19
    • US09715124
    • 2000-11-20
    • Takashi HashimotoTakahiro UrakabeAkihiko IwataYoshikazu TsunodaTakayoshi Nagai
    • Takashi HashimotoTakahiro UrakabeAkihiko IwataYoshikazu TsunodaTakayoshi Nagai
    • G09G310
    • G09G3/2927G09G3/296G09G2310/066
    • A synthetic round pulse generation circuit can output constant currents (i1, i2). By charging a capacitance element (CP) with the constant currents (i1, i2), a ramp pulse (10a) having a rate of voltage change of i1/CP and a ramp pulse (10b) having a rate of voltage change of i2/CP are applied to the capacitance element (CP). A synthetic round pulse (11) consists of the ramp pulse (10a) and the ramp pulse (10b). In the synthetic round pulse (11), the lengths of application time periods (T10a, T10b) are set so that a discharge is started with the ramp pulse (10a). Further, the rate of voltage change (i1/CP) of the ramp pulse (10a) is set to a small value so that the intensity of the discharge at a discharge starting time (t11f) in the application time period (T10a) may be sufficiently weak. When a PDP is driven with the synthetic round pulse, it is thereby possible to reduce an application time of the round waveform.
    • 综合回合脉冲发生电路可以输出恒定电流(i1,i2)。 通过用恒定电流(i1,i2)对电容元件(CP)充电,具有i1 / CP的电压变化率的斜坡脉冲(10a)和具有i2 / CP的电压变化率的斜坡脉冲(10b) CP被施加到电容元件(CP)。 合成回合脉冲(11)由斜坡脉冲(10a)和斜坡脉冲(10b)组成。 在合成回合脉冲(11)中,施加时间段(T10a,T10b)的长度被设定为以斜坡脉冲(10a)开始放电。 此外,斜坡脉冲(10a)的电压变化率(i1 / CP)被设定为较小的值,使得在施加时间段(T10a)中的放电开始时间(t11f)的放电强度可以是 足够弱 当利用合成圆形脉冲驱动PDP时,由此可以减少圆形波形的施加时间。
    • 7. 发明授权
    • Electric discharge machine with output power control
    • 放电机具有输出功率控制
    • US06806434B1
    • 2004-10-19
    • US10296329
    • 2002-11-22
    • Akihiro SuzukiAkihiko IwataTakashi HashimotoYoshikazu TsunodaHideaki HayashiAtsushi Taneda
    • Akihiro SuzukiAkihiko IwataTakashi HashimotoYoshikazu TsunodaHideaki HayashiAtsushi Taneda
    • B23H102
    • B23H1/022B23H2300/22
    • An electric discharge machine in which electric power for working is supplied between an electrode and workpiece by an electric power unit so as to generate electric discharge between the electrode and workpiece and conduct machining on the workpiece, the electric discharge machine having a voltage detector for detecting output voltage V of a DC electric power source of the electric power unit; a current detector for detecting output current I of the DC electric power source of the electric power unit; a calculator for calculating product V·I of V and I; and a controller for controlling output electric power of the electric power unit to be constant on the basis of a difference between a working command signal for giving a predetermined electric power command and V·I. Even when load impedance fluctuates, it is possible to suppress the fluctuation of electric discharge power, so that surface roughness on a machined face of the workpiece can be made uniform.
    • 一种放电机,其中通过电力单元在电极和工件之间供应用于工作的电力,以在电极和工件之间产生放电并对工件进行加工,该放电机具有用于检测的电压检测器 电力单元的直流电源的输出电压V; 电流检测器,用于检测电力单元的直流电源的输出电流I; 用于计算V和I的乘积V.I的计算器; 以及控制器,用于基于用于给出预定电力指令的工作指令信号和V.I之间的差来控制电力单元的输出功率恒定。 即使负载阻抗波动,也可以抑制放电功率的波动,能够使加工面上的表面粗糙度均匀。