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    • 3. 发明申请
    • FOCUS VOLTAGE AMPLIFIER
    • WO2003090448A3
    • 2003-10-30
    • PCT/US2003/012176
    • 2003-04-21
    • THOMSON LICENSING S.A.GEORGE, John, Barrett
    • GEORGE, John, Barrett
    • G09G1/04
    • A dynamic focus amplifier (17) for generating a dynamic focus voltage for a focus electrode for a cathode ray tube (12) at a capacitive load (C602, C wire, CTl) includes a source of a periodic signal at a horizontal deflection frequency. A pull­down transistor (Q1) is responsive to the periodic signal and coupled to the capacitive load (C602, C wire, CTl) for producing, in accordance with the periodic signal, a first portion of the dynamic focus voltage that decreases, during a first portion of a period of the periodic signal. A storage capacitor (C501) is coupled to the capacitive load (C602, C wire, CTl) for replenishing a charge stored in the storage capacitor (C501) from a charge stored in the capacitive load to develop a control voltage in the storage capacitor (C501). A pull-up transistor is responsive to the control voltage and coupled to a source of a high voltage and to the capacitive load (C602, C wire, CTl) for producing from the high voltage a current that is coupled to the capacitive load. The current develops a second portion of the dynamic focus voltage that increases, during a second portion of the period of the periodic signal, and stores the charge in the capacitive load (C602, C wire, CTl).
    • 4. 发明申请
    • FOCUS VOLTAGE CONTROL ARRANGEMENT
    • 聚焦电压控制装置
    • WO2003090193A1
    • 2003-10-30
    • PCT/US2003/011771
    • 2003-04-17
    • THOMSON LICENSING S.A.GEORGE, John, Barrett
    • GEORGE, John, Barrett
    • G09G1/04
    • H04N3/26
    • A video imaging apparatus (10) comprises first and second cathode-ray tubes (12), each having an ultor electrode (12u) and a focus electrode (12f). A power supply generates an ultor voltage, which may have a fluctuating voltage component produced by beam current variations, and which is coupled to first and second ultor electrodes (12u) of the first and second cathode-ray tubes (12). A high voltage amplifier (22) generates a dynamic focus voltage component at a frequency related to a deflection frequency. A combining network (34) combines the fluctuating voltage component and the dynamic focus voltage component to develop a combined, dynamic focus voltage. The combined, dynamic focus voltage is coupled to each of the first and second focus electrodes (12f) for developing from the combined, dynamic focus voltage each of a first dynamic focus voltage at the first focus electrode (12f) and a second dynamic focus voltage at the second focus electrode (12f).
    • 视频成像装置(10)包括第一和第二阴极射线管(12),每个具有阳极电极(12u)和聚焦电极(12f)。 电源产生高压阳极电压,其可以具有由电流变化产生的波动的电压分量,并且耦合到第一和第二阴极射线管(12)的第一和第二阳极电极(12u)。 高电压放大器(22)以与偏转频率相关的频率产生动态聚焦电压分量。 组合网络(34)组合波动电压分量和动态聚焦电压分量以开发组合的动态聚焦电压。 组合的动态聚焦电压被耦合到第一和第二聚焦电极(12f)中的每一个,用于从组合的动态聚焦电压显现第一聚焦电极(12f)处的第一动态聚焦电压和第二动态聚焦电压 在第二聚焦电极(12f)处。
    • 6. 发明申请
    • DEFLECTION APARATUS HAVING RASTER POSITIONING CIRCUITRY
    • 具有RASTER定位电路的偏移APARATUS
    • WO2007030118A1
    • 2007-03-15
    • PCT/US2005/032237
    • 2005-09-08
    • THOMSON LICENSINGGEORGE, John, Barrett
    • GEORGE, John, Barrett
    • H04N3/227
    • H04N3/227
    • A deflection apparatus having raster positioning circuitry enables deflection functions including a centering function. According to an exemplary embodiment, the deflection apparatus includes a first rectifier (D201 or D61) for conducting a first current having a first polarity. A first transistor (Q101 or Q453a) is coupled in series with the first rectifier (D201 or D61) for conducting the first current. A second rectifier (D101 or D60) conducts a second current having a second polarity. A second transistor (Q201 or Q454a) is coupled in series with the second rectifier (D101 or D60) for conducting the second current. Control circuitry (400, 500 or R451) controls the conduction of the first transistor (Q101 or Q453a) and the second transistor (Q201 or Q454a) to control a ratio of a magnitude of the first current to a magnitude of the second current.
    • 具有光栅定位电路的偏转装置能够实现包括定心功能的偏转功能。 根据示例性实施例,偏转装置包括用于传导具有第一极性的第一电流的第一整流器(D201或D61)。 第一晶体管(Q101或Q453a)与第一整流器(D201或D61)串联耦合,用于导通第一电流。 第二整流器(D101或D60)传导具有第二极性的第二电流。 第二晶体管(Q201或Q454a)与第二整流器(D101或D60)串联耦合,用于传导第二电流。 控制电路(400,500或R451)控制第一晶体管(Q101或Q453a)和第二晶体管(Q201或Q454a)的导通,以控制第一电流的幅度与第二电流的幅度的比值。
    • 10. 发明申请
    • FOCUS VOLTAGE AMPLIFIER
    • 聚焦电压放大器
    • WO2003090448A2
    • 2003-10-30
    • PCT/US2003/012176
    • 2003-04-21
    • THOMSON LICENSING S.A.GEORGE, John, Barrett
    • GEORGE, John, Barrett
    • H04N
    • H04N3/26
    • A dynamic focus amplifier for generating a dynamic focus voltage for a focus electrode of a cathode ray tube at a capacitive load includes a source of a periodic signal at a horizontal deflection frequency. A pull-down transistor is responsive to the periodic signal and coupled to the capacitive load for producing, in accordance with the periodic signal, a first portion of the dynamic focus voltage that decreases, during a first portion of a period of the periodic signal. A storage capacitor is coupled to the capacitive load for replenishing a charge stored in the storage capacitor from a charge stored in the capacitive load to develop a control voltage in the storage capacitor. A pull-up transistor is responsive to the control voltage and coupled to a source of a high voltage and to the capacitive load for producing from the high voltage a current that is coupled to the capacitive load. The current develops a second portion of the dynamic focus voltage that increases, during a second portion of the period of the periodic signal, and stores the charge in the capacitive load.
    • 用于在电容性负载下产生用于阴极射线管的聚焦电极的动态聚焦电压的动态聚焦放大器包括在水平偏转频率处的周期性信号的源。 下拉晶体管响应于周期性信号并耦合到电容性负载,以根据周期信号产生动态聚焦电压的第一部分,其在周期信号的周期的第一部分期间减小。 存储电容器耦合到电容性负载,用于从存储在电容性负载中的电荷补充存储在存储电容器中的电荷,以产生存储电容器中的控制电压。 上拉晶体管响应于控制电压并且耦合到高电压源和电容负载,以从高电压产生耦合到电容性负载的电流。 电流产生动态聚焦电压的第二部分,其在周期信号的周期的第二部分期间增加,并将电荷存储在电容性负载中。