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    Circuitry for preventing doming phenomenon in a television receiver and a preventing method thereof
    3.
    发明公开
    Circuitry for preventing doming phenomenon in a television receiver and a preventing method thereof 失效
    在电视接收机中预防电视接收机的电路及其预防方法

    公开(公告)号：EP0354518A3

    公开(公告)日：1991-07-17

    申请号：EP89114570.8

    申请日：1989-08-07

    申请人： SANYO ELECTRIC CO., LTD.

    发明人： Okamoto, Toshikazu ,  Inoue, Fukashi

    IPC分类号： H04N5/57

    CPC分类号： H04N5/57

    摘要： Circuitry for preventing a doming phenomenon in a color television receiver includes circuitry (5, 6, 7, 8, 9, 10) for detecting the presence or absence of a high luminance portion not less than a predetermined area on a television receiver screen, and circuitry (11, 60, 2, 3) for slowly and gradually reducing at least one of luminance and contrast of the screen when the high luminance portion not less than a predetermined area exists on the screen. The area detecting circuitry includes a circuit (5, 6; 5′, 6′) for detecting the presence of the high luminance portion on the screen, a first charge/discharge circuit 9 for generating a signal, the level of which shifts slowly in a first direction when this high luminance potion larger than a predetermined width exists, and shifts rapidly in a second direction when it is absent, a circuit (10) for comparing an output of the charge/discharge circuit with a second reference voltage and for deciding whether the area of the high luminance portion is not less than a predetermined area, a circuit (11) for generating a control signal for gradually reducing the luminance/contrast to the presence of the high luminance portion not less than a predetermined area in response to an output of the decision circuit and for rapidly recovering the luminance/contrast to the original state in response to the absence thereof.

    Circuitry for preventing doming phenomenon in a television receiver and a preventing method thereof
    4.
    发明公开
    Circuitry for preventing doming phenomenon in a television receiver and a preventing method thereof 失效
    电路，用于防止所述隆起现象在电视接收器和一个防止其方法。

    公开(公告)号：EP0354518A2

    公开(公告)日：1990-02-14

    申请号：EP89114570.8

    申请日：1989-08-07

    申请人： SANYO ELECTRIC CO., LTD.

    发明人： Okamoto, Toshikazu ,  Inoue, Fukashi

    IPC分类号： H04N5/57

    CPC分类号： H04N5/57

    摘要： Circuitry for preventing a doming phenomenon in a color television receiver includes circuitry (5, 6, 7, 8, 9, 10) for detecting the presence or absence of a high luminance portion not less than a predetermined area on a television receiver screen, and circuitry (11, 60, 2, 3) for slowly and gradually reducing at least one of luminance and contrast of the screen when the high luminance portion not less than a predetermined area exists on the screen. The area detecting circuitry includes a circuit (5, 6; 5′, 6′) for detecting the presence of the high luminance portion on the screen, a first charge/discharge circuit 9 for generating a signal, the level of which shifts slowly in a first direction when this high luminance potion larger than a predetermined width exists, and shifts rapidly in a second direction when it is absent, a circuit (10) for comparing an output of the charge/discharge circuit with a second reference voltage and for deciding whether the area of the high luminance portion is not less than a predetermined area, a circuit (11) for generating a control signal for gradually reducing the luminance/contrast to the presence of the high luminance portion not less than a predetermined area in response to an output of the decision circuit and for rapidly recovering the luminance/contrast to the original state in response to the absence thereof.

    摘要翻译： 电路，用于在彩色电视接收机防止隆起现象包括用于检测比的电视接收机屏幕上的预定区域中的高亮度部分不小于的存在或不存在的电路（5，6，7，8，9，10），和 对于缓慢和逐渐减小亮度中的至少一个，并且当所述高亮度部分不小于预定区域存在较少在屏幕上画面的对比度的电路（11，60，2，3）。 所述区域检测电路包括一电路（5,6; 5分钟，6分钟），用于检测在屏幕上，用于产生信号的第一充电/放电电路9上的高亮度部分的存在，而其电平移位缓慢 第一方向当这种高亮度药水大于预定宽度存在较大的，并迅速转移的第二方向。当它不存在时，在充电/放电电路的输出与第二参考电压进行比较，并用于判定电路（10） 是否高亮度的部分的面积不小于预定区域，用于产生控制信号，用于逐渐地减小所述亮度/对比度为响应于所述高亮度部分不大于预定面积较少的存在的电路（11）更小 在判定电路的输出和用于快速恢复响应于不存在其亮度/对比度到原来的状态。

    Chrominance signal circuit in color television receiver
    5.
    发明公开
    Chrominance signal circuit in color television receiver 失效
    einemFarbfernsehempfänger中的Chrominanzsignalschaltung。

    公开(公告)号：EP0009237A1

    公开(公告)日：1980-04-02

    申请号：EP79103514.0

    申请日：1979-09-19

    申请人： SANYO ELECTRIC CO., LTD.

    发明人： Inoue, Fukashi

    IPC分类号： H04N9/46

    CPC分类号： H04N9/465

    摘要： A chrominance signal circuit in a color television receiver comprises a PAL switch (17) for reversing a subcarrier signal in every second line, which PAL switch is driven responsive to a flip-flop (27) the output of which is reversed for every second line responsive to a horizontal pulse. The burst signal extracted from the received color television signal is reversed for every second line by a switch (21, 22) also responsive to the output of the flip-flop. The reversed burst signal is subjected to phase detection (23) together with a signal obtained by +90° phase shifting (24) the subcarrier. The phase detected output is integrated by an integration circuit (25). The output of the integration circuit is applied to prevent the horizontal pulse (P1') from being applied to the flip-flop as a drive input.

    摘要翻译： 彩色电视接收机中的色度信号电路包括PAL开关（17），用于反转每秒第二行中的副载波信号，该PAL开关响应于触发器（27）被驱动，其触发器（27）的输出反向于每秒 响应于水平脉冲。 从接收到的彩色电视信号中提取的脉冲串信号通过也响应于触发器的输出的开关（21,22）每二行反转一次。 反相脉冲串信号与通过+90°相移（24）子载波获得的信号一起进行相位检测（23）。 相位检测输出由积分电路（25）集成。 应用积分电路的输出以防止水平脉冲（P1'）作为驱动输入施加到触发器。