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1. 发明专利

JPH04186990A COLOR RECEIVING TUBE DEVICE 失效
公开(公告)号：JPH04186990A
公开(公告)日：1992-07-03
申请号：JP31735690
申请日：1990-11-20
申请人： MATSUSHITA ELECTRIC IND CO LTD , MATSUSHITA ELECTRONICS CORP
发明人： KITADA KATSUHISA , YOSHIDA TOSHIFUMI , OSE TOSHIO , IWASAKI KATSUYO
IPC分类号： H01J29/51 , H04N9/28
摘要： PURPOSE:To prevent production of mis-convergence and to improve the picture quality by differentiating the intensity of a magnetic field fed between a couple of pole pieces through a 1st ferrite core form the intensity of the same magnetic field through a 2nd ferrite core. CONSTITUTION:A dynamic convergence means in use consists of 1st and 2nd ferrite cores on which coils with different number of turns are wound. For example, the number of turns of a couple of coils 12a, 12b wound on the 1st ferrite core 10 is 110.5 respectively and the number of turns of a couple of coils 13a, 13b wound on the 2nd ferrite core 11 is 94.5 respectively. Thus, a deviation in 0.23mm at the left end on a horizontal axis having been caused in a conventional structure where number of turns of all the coils 12a, 12b, 13a, 13b is selected to be 102.5 equally is decreased to 0.10mm by providing a difference from the number of turns in this way. Moreover, a deviation in 0.08mm at the right end on the horizontal axis is reduced to 0.0mm.

2. 发明专利

JPH0352683B2 失效
公开(公告)号：JPH0352683B2
公开(公告)日：1991-08-12
申请号：JP12563584
申请日：1984-06-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHIDA TOSHIFUMI , SAKAI SATORU , UEDA MINORU
IPC分类号： H03F1/26 , H03F1/34 , H03F1/42

3. 发明专利

JPS6269781A PICTURE DISPLAY DEVICE 失效
公开(公告)号：JPS6269781A
公开(公告)日：1987-03-31
申请号：JP20957085
申请日：1985-09-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHIDA TOSHIFUMI , KURATA TAKATSUGU , NISHIDE TAKUYA , UEDA MINORU
IPC分类号： H01J31/12 , H04N5/68
摘要： PURPOSE:To extend the life of a picture display device by detecting that the emission capacity of a line cathode is deteriorated with the lapse of time and the titled device starts an operation at the temperature limit area, raising the line cathode temperature and using it at the space charge limit area. CONSTITUTION:A detecting pulse inserting circuit 62 generates a detecting pulse emitting successively the line cathode one by one during the vertical blanking period where the signal is not impressed to the beam flow control electrode, and supplies it to a line cathode driving circuit 26. The electronic beam emitted during the blanking period flows into a vertical converging elec trode 3' and enters a vertical converging electrode electric power source termi nal 60. At such a time, by the size of the beam electric current, the voltage is generated at a resistance 58, this is level-shifted by a capacitor 59 and clamped at a clamping circuit 50. A sample holding circuit A51 sample-holds the front edge part of the waveform, a sample holding circuit B52 sample-holds the rear edge, an A/D converting circuit device converts these, and a CPU 55 judges whether the area is the temperature or space charge limit area by the difference in the electronic beam quantity of the front edge and the rear edge and causes the driving voltage of the circuit 26 to rise by one step.

4. 发明专利

JPS6229378A DRIVE METHOD FOR PICTURE DISPLAY DEVICE 失效
公开(公告)号：JPS6229378A
公开(公告)日：1987-02-07
申请号：JP16877585
申请日：1985-07-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOKOYAMA TOSHINOBU , WATANABE SADAO , YOSHIDA TOSHIFUMI
IPC分类号： H04N5/68 , G09G1/20 , G09G1/28 , H01J31/12
摘要： PURPOSE:To attain stable picture and high quality by shifting the timing between a heat current loaded to a wire cathode and a control pulse by the temperature rise time of the wire cathode at start. CONSTITUTION:A time when a control pulse 18 rises is retarded at start and the temperature rise time of the wire cathode 11 due to heat current is ensured until thermoelectron is emitted and a natural frequency (a) of the wire cathode 11 is not coincident with harmonic of the control pulse 18 in the temperature rise process of the wire cathode till a time t2. Because of the point of time of coincidence, the resonance with the natural frequency (a) of the wire cathode 1 due to the energy of the control pulse 8 is not caused. As a result, the resonance at start in the wire cathode 1 is avoided. Thus, the vibration of the wire cathode with a large amplitude is avoided and a picture without movement and uneven brightness is obtained.

5. 发明专利

JPS6220483A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPS6220483A
公开(公告)日：1987-01-29
申请号：JP15963685
申请日：1985-07-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： UEDA MINORU , MIZOGAMI YASUO , YOSHIDA TOSHIFUMI
IPC分类号： H04N5/68
摘要： PURPOSE:To uniform brightness is a transient range and to improve image quality by varying momentarily a beam lead-out voltage corresponding to variation in the emission quantity of electrons in the transient range at the time of power-on operation. CONSTITUTION:When the display device which has a rear electrode 1, a linear cathode electron source 2, and a converging electrode 3 is powered on, a specific voltage is applied to the converging electrode 3 in a vertical blanking period to which a certain time is elapsed after the display device is switched on. At this time, a switch 59 is placed at a side (a) and an inflow current to the converging electrode 3 is led out as the terminal voltage across a resistance 51. This voltage is compared by a differential amplifier 53 with a value corresponding to the inflow current in a stationary state. Then, a voltage drop circuit 55 is operated through a function generator 54 to control the voltage applied to the converging electrode 3. Consequently, an irregularity in the emission quantity due to a difference in start-up characteristics of the linear cathode in power-on operation is eliminated and an image having good quality having uniform brightness is obtained.

6. 发明专利

JPS61117983A Picture display device 失效
标题翻译：图像显示设备
公开(公告)号：JPS61117983A
公开(公告)日：1986-06-05
申请号：JP23800384
申请日：1984-11-12
申请人： Matsushita Electric Ind Co Ltd
发明人： UEDA MINORU , YOSHIDA TOSHIFUMI , INOHARA SHIZUO , KURATA TAKATSUGU
IPC分类号： H04N5/68 , H01J31/12 , H04N5/66
摘要： PURPOSE: To improve the unevenness of vertical deflection sensitivity and to obtain excellent picture quality without the nonuniformity of brightness by giving to a line cathode ray a potential gradient caused by an emission current and that of a reverse polarity.
CONSTITUTION: Conductive materials 1a, 1c and 1b are coated at left and right ends and a center of the back electrode 1 of a uniform resistance, and the back electrode 1 is bisected. A normal back electrode voltage VB is impressed to the center conductive material 1b through a resistance R
31 , and the conductive materials 1a and 1c commonly connected are connected to collectors of the same number of installed transistors TR
1 , TR
3 , ...TR
29 as the line cathoderays. To their emitters are collectors of transistors TR
2 , TR
4 , ...TR
30 connected, and sequentially turned on by line cathode ray drive pulses (a)∼(o). A adjusted control voltage is impressed to bases of the transistors TR
1 , TR
3 , ...TR
29 , whereby a voltage having the potential gradient from the center to both ends is generated in the back electrode 1 at every line cathode ray band so that the nonuniformity of the vertical deflection sensitivity due to the initial speed of an electron beam can be compensated.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了提高垂直偏转灵敏度的不均匀性，并且通过使线阴极射线产生由发射电流和相反极性引起的电位梯度而获得优异的图像质量而没有亮度不均匀。构成：导电材料1a，1c和1b在均匀电阻的左右端和背面电极1的中心被涂覆，并且背面电极1被平分。正常的背电极电压VB通过电阻R31施加到中心导电材料1b，并且共同连接的导电材料1a和1c连接到相同数目的安装晶体管TR1，TR3，... TR29的集电极作为线阴极器。对于它们的发射极是晶体管TR2，TR4，... TR30的集电极连接，并通过线阴极射线驱动脉冲（a） - （o）依次导通。对晶体管TR1，TR3，... TR29的基极施加调整后的控制电压，由此在背面电极1的每一行阴极射线带产生具有从中心到两端的电位梯度的电压，使得不均匀性可以补偿由于电子束的初始速度引起的垂直偏转灵敏度。

7. 发明专利

JPS6190590A Picture display device 失效
标题翻译：图像显示设备
公开(公告)号：JPS6190590A
公开(公告)日：1986-05-08
申请号：JP21180784
申请日：1984-10-09
申请人： Matsushita Electric Ind Co Ltd
发明人： YAMASHITA AKIRA , YOSHIDA TOSHIFUMI , UEDA MINORU
IPC分类号： H04N5/68 , H04N5/66 , H04N9/12 , H04N9/20 , H04N9/30 , H04N9/64 , H04N9/68
摘要： PURPOSE: To maintain white balance conditions at the time of 100% modulation when video modulation becomes over-modulated by making constant an input R, G and B video signal level ratio of a pulse width modulation circuit without depending upon the video modulation factor.
CONSTITUTION: An R, G and B video signal level from a color demodulation circuit 30 is adjusted by level adjusting volumes 57, 58 and 59 and a PWM pulse width can be obtained for R, G and B video signal levels. A switching diode 60 is clipped to a voltage V
1 when a level of an R video signal exceeds 100%, and a switching diode 61 is clipped to a voltage V
2 in the same manner when a level of the G video signal exceeds 100%. Consequently, when an R, G and B video signal level respectively exceeds 100% (level equivalent to a white level of the video signal), an output pulse width of the pulse width modulation circuit corresponding to it is saturated and the R, G and B video signal level is maintained respectively to the pulse width at the time of 100%.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过使脉冲宽度调制电路的输入R，G和B视频信号电平比恒定，而不依赖于视频调制因子，在视频调制变得过调制时，保持100％调制时的白平衡条件。构成：来自颜色解调电路30的R，G和B视频信号电平由电平调节量57,58和59调节，并且可以获得R，G和B视频信号电平的PWM脉冲宽度。当R视频信号的电平超过100％时，开关二极管60被钳位到电压V1，并且当G视频信号的电平超过100％时，开关二极管61以相同的方式被限幅到电压V2。因此，当R，G和B视频信号电平分别超过100％（与视频信号的白电平相当的电平）时，对应于其的脉宽调制电路的输出脉冲宽度饱和，R，G和 B视频信号电平分别维持在100％时的脉冲宽度。

8. 发明专利

JPS6190579A Picture display device 失效
标题翻译：图像显示设备
公开(公告)号：JPS6190579A
公开(公告)日：1986-05-08
申请号：JP21180284
申请日：1984-10-09
申请人： Matsushita Electric Ind Co Ltd
发明人： YOSHIDA TOSHIFUMI
IPC分类号： H04N5/68 , G09G3/30 , H01J31/12 , H04N5/66 , H04N9/12 , H04N9/30
摘要： PURPOSE: To keep a stabilized electron beam emitting capacity for a long period by detecting the reduction in electron beam emitting amount from a line cathode due to aging and controlling a line cathode drive circuit so that temperature of the line cathode can be increased when the electron beam emitting amount is reduced.
CONSTITUTION: Corresponding to line cathodes 2a∼2o an electron beam emitting amount detection circuit 45 detects an electron beam emitting amount through a resistance 44, and supplies the difference from its reference to memory circuits 46a∼46o for storing line cathode heat voltages of line cathode drive circuits 26a∼26o. As a result the electron beam emitting amounts of the line cathodes 2a∼2o come to reference values and are stabilized. In order to reduce the picture quality deterioration due to the dispersion of the partial electron beam emitting amount in one line cathode, which comes to the brightness irregularity on a screen, the temperature of the line cathodes 2a∼2o is set so that they can have the higher electron beam emitting capacity than that under actual using conditions, and the sufficient electron beam supply capacity is given to the line cathodes 2a∼2o. Consequently the dispersion of the electron beam emitting capacity of each line cathode is masked due to the influence of a space electric charge, the dispersion of brightness can be substantially improved.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过检测由于老化引起的线阴极电子束发射量的减少，长时间保持稳定的电子束发射能力，并控制线阴极驱动电路，使电子线的阴极温度可以提高光束发射量减少。构成：对于线阴极2a-2o，电子束发射量检测电路45通过电阻44检测电子束发射量，并将其参考值提供给存储电路46a-46o，用于存储线阴极的线阴极热电压驱动电路26a-26o。结果，线阴极2a-2o的电子束发射量成为参考值并稳定。为了降低由于在一行阴极中的部分电子束发射量的分散引起的图像质量恶化，这导致屏幕上的亮度不均匀，线阴极2a-2o的温度被设定为使得它们可以具有比实际使用条件下更高的电子束发射能力，并且给阴极线2a-2o提供足够的电子束供应能力。因此，由于空间电荷的影响，每行阴极的电子束发射能力的色散被掩蔽，因此可以显着提高亮度的分散。

9. 发明专利

JPS60214112A Amplifier 失效
标题翻译：放大器
公开(公告)号：JPS60214112A
公开(公告)日：1985-10-26
申请号：JP7110584
申请日：1984-04-10
申请人： Matsushita Electric Ind Co Ltd
发明人： YOSHIDA TOSHIFUMI , UEDA MINORU , TAKUHARA SADAHIRO
IPC分类号： H03G3/30
摘要： PURPOSE: To utilize effectively an output dynamic range of a differential amplifier to a maximum value by detecting, storing an average level of a desired part of an input signal and applying it to the differential amplifier.
CONSTITUTION: The input signal 3 is fed to an input terminal of the differential amplifier circuit 7 and an average level detection and storage circuit 8. Then the detection and storage circuit 8 detects and stores the average level of the desired part of the input signal 3 by the control of a control signal 4. An average signal 9 from the detection and storage circuit 8 is fed to the other input terminal of the differential amplifier 7 controlled by the control signal 4. Even if the DC level and amplitude of the input signal 3 are changed, the optimum DC level is fed to the other input terminal of the differential amplifier 7. Thus, the output dynamic range of the differential amplifier is utilized effectively to the maximum value.
COPYRIGHT: (C)1985,JPO&Japio
摘要翻译：目的：通过检测，存储输入信号的所需部分的平均电平并将其施加到差分放大器，将差分放大器的输出动态范围有效地利用到最大值。构成：输入信号3被馈送到差分放大器电路7的输入端和平均电平检测和存储电路8.然后，检测和存储电路8检测并存储输入信号3的期望部分的平均电平通过控制信号4的控制。来自检测和存储电路8的平均信号9被馈送到由控制信号4控制的差分放大器7的另一个输入端。即使输入信号的直流电平和幅度 3变化时，最佳直流电平被馈送到差分放大器7的另一个输入端。因此，差分放大器的输出动态范围被有效地利用到最大值。

10. 发明专利

JPS60151727A POWER SUPPLY VOLTAGE 失效
公开(公告)号：JPS60151727A
公开(公告)日：1985-08-09
申请号：JP703884
申请日：1984-01-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHIDA TOSHIFUMI , YAMASHITA AKIRA , IWAO TOYOHIRO
IPC分类号： G05F1/56
摘要： PURPOSE:To obtain the optional dependence on the power supply voltage by connecting an end of the 1st resistance to the voltage following the power supply voltage with the other end connected to a constant current source respectively and connecting the 2nd resistance between said terminal of other side and a constant voltage source to deliver an output. CONSTITUTION:A fixed level of voltage 63 having no relation with the power supply voltage 32 is obtained from a constant voltage power supply 67 obtained by compensating the temperature characteristics of a Zener diode 60. While the voltage 65 is applied to a series matter of the 1st resistance 40 and a constant current source 69 from a voltage power supply 68 depending on the voltage 32. The 2nd resistance 43 is set between the voltage 63 and the juncture between the resistance 40 and the source 69, and the output voltage 65 is obtained from said juncture. Then the optional dependence on the power supply voltage is secured by changing the value of the resistance 43.

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