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1. 发明专利

DE3429264A1 未知
公开(公告)号：DE3429264A1
公开(公告)日：1985-04-04
申请号：DE3429264
申请日：1984-08-08
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： MASUDA YUKIHIRO , ISHIBASHI SHIZUKA , TAKAHASHI KENJI , KODAMA TAKUMA , KUDO KOJI , HOMBOUGH MASANORI
IPC分类号： H04N5/16 , H04N9/093 , H04N5/21 , H04N3/22 , H04N9/09
摘要： A television camera capable of correcting shadings caused by digital registration faculty employed in a multi-tube type color television camera. The television camera comprises differentiating circuits for generating differentiated waves of correction waveforms used for adjusting registration, and non-linear circuits for processing the differentiated waves. Outputs of the non-linear circuits control the gain of a video signal circuit so that components responsible for the generation of shadings can be removed from a video signal.

2. 发明专利

GB2147171B TELEVISION CAMERA 未知
公开(公告)号：GB2147171B
公开(公告)日：1987-03-04
申请号：GB8420036
申请日：1984-08-07
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： MASUDA YUKIHIRO , ISHIBASHI SHIZUKA , TAKAHASHI KENJI , KODAMA TAKUMA , KUDO KOJI , HOMBOUGH MASANORI
IPC分类号： H04N5/16 , H04N9/093 , H04N5/20
摘要： A television camera capable of correcting shadings caused by digital registration faculty employed in a multi-tube type color television camera. The television camera comprises differentiating circuits for generating differentiated waves of correction waveforms used for adjusting registration, and non-linear circuits for processing the differentiated waves. Outputs of the non-linear circuits control the gain of a video signal circuit so that components responsible for the generation of shadings can be removed from a video signal.

3. 发明专利

GB2147171A TELEVISION CAMERA 未知
公开(公告)号：GB2147171A
公开(公告)日：1985-05-01
申请号：GB8420036
申请日：1984-08-07
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： MASUDA YUKIHIRO , ISHIBASHI SHIZUKA , TAKAHASHI KENJI , KODAMA TAKUMA , KUDO KOJI , HOMBOUGH MASANORI
IPC分类号： H04N5/16 , H04N9/093 , H04N5/20
摘要： A television camera capable of correcting shadings caused by digital registration faculty employed in a multi-tube type color television camera. The television camera comprises differentiating circuits for generating differentiated waves of correction waveforms used for adjusting registration, and non-linear circuits for processing the differentiated waves. Outputs of the non-linear circuits control the gain of a video signal circuit so that components responsible for the generation of shadings can be removed from a video signal.

4. 发明专利

JPS615691A REGISTRATION CORRECTING SYSTEM 失效
公开(公告)号：JPS615691A
公开(公告)日：1986-01-11
申请号：JP12523784
申请日：1984-06-20
申请人： HITACHI LTD , HITACHI ELECTRONICS , HERCULES INC
发明人： TAKAHASHI KENJI , ISHIBASHI SHIZUKA , MASUDA YUKIHIRO , KODAMA TAKUMA , KUDOU KOUJI
IPC分类号： H04N3/23 , H04N3/22 , H04N9/093

5. 发明专利

JPS62147867A BEAM CURRENT CONTROL SYSTEM FOR IMAGE PICKUP TUBE 失效
公开(公告)号：JPS62147867A
公开(公告)日：1987-07-01
申请号：JP28775385
申请日：1985-12-23
申请人： HITACHI LTD , HITACHI ELECTRONICS , HITACHI VIDEO ENG
发明人： KUDO KOJI , TAKAHASHI KENJI , SATO KAZUHIRO , MARUYAMA MASANORI , HONBO MASANORI , KODAMA TAKUMA
IPC分类号： H04N5/228
摘要： PURPOSE:To prevent the dynamic range of a beam current of an image pickup tube from being lowered by providing a voltage limit circuit not decreasing a voltage fed to the 1st grid more than a voltage causing a maximum beam current before the 1st grid so as to control the beam current. CONSTITUTION:A signal current Is outputted from a photoconductive target 14 is converted into a signal voltage by a preamplifier 15. A sawtooth wave 16 being an output waveform of the preamplifier 15 is inputted to a gamma correction circuit 17, from which a waveform 18 is obtained. The gamma correction is used to make the relation between the beam current and the 1st grid voltage of the image pickup tube in use linear thereby eliminating the unstable element of the beam current control. The gamma correction output 18 is inputted to the 2nd amplifier 19, where the signal is amplified up to a prescribed level. Then an adder 20 superimposes the signal on a reference voltage E0 in terms of DC, an output 21 of the adder 20 is inputted to a grip circuit 22, where a voltage limit not lowering the 1st grid voltage more than a voltage EM where the beam current causes an inflection point, a voltage waveform 23 is obtained and fed to the 1st grid 12.

6. 发明专利

JPS615690A ELECTROMAGNETIC FOCUSING CIRCUIT OF MULTITUBE TYPE TELEVISION CAMERA 失效
公开(公告)号：JPS615690A
公开(公告)日：1986-01-11
申请号：JP12523684
申请日：1984-06-20
申请人： HITACHI LTD , HITACHI ELECTRONICS , HERCULES INC
发明人： KUDOU KOUJI , TAKAHASHI KENJI , ISHIBASHI SHIZUKA , KODAMA TAKUMA , MIYOSHI OSAMU
IPC分类号： H04N9/09

7. 发明专利

JPS6043986A REGISTRATION CORRECTING CIRCUIT OF COLOR TELEVISION CAMERA 失效
公开(公告)号：JPS6043986A
公开(公告)日：1985-03-08
申请号：JP15157683
申请日：1983-08-22
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： ISHIBASHI SHIZUKA , TAKAHASHI KENJI , KUDOU KOUJI , MASUDA YUKIHIRO , HONBOU MASANORI , KODAMA TAKUMA
IPC分类号： H04N9/093
摘要： PURPOSE:To prevent shading, and to execute independently the correction of a measure by fetching a low band component in distortion correcting quantity of an intersection point divided in the horizontal and vertical directions so that the influence of data of the lowest stage of a picture plane is not exerted on the uppermost stage. CONSTITUTION:The passing property of a low-pass filter is varied between the data Yn of the lowest stage and the data Yo of the uppermost stage, and in order to the influence of data Y is not exerted on Yo, the frequency characteristic is made roughly flat by short-circuiting both ends of resistances R1, R2 of an active filter. As a result, information of the data Yn stored in capacitors C1, C2 in the active filter is discharged, the result is convenient for inputting new information.

8. 发明专利

JPS61144995A ELECTRIC CURRENT FOCUS CIRCUIT OF MULTITUBULAR TELEVISION CAMERA 失效
公开(公告)号：JPS61144995A
公开(公告)日：1986-07-02
申请号：JP26622284
申请日：1984-12-19
申请人： HITACHI LTD , HITACHI VIDEO ENG , HITACHI ELECTRONICS
发明人： KODAMA TAKUMA , SAKURAI ATSUSHI , SAKURABA NOBUTOSHI , KUDO KOJI
IPC分类号： H04N9/09
摘要： PURPOSE:To reduce a power supply voltage and to decrease widely a driving electric power by supplying a voltage necessary to operate normally a differential amplifier by the voltage which occurs with a resistance component of one focus coil, and limiting the resistance value of the detecting resistance to the necessary minimum. CONSTITUTION:An electric potential of a connecting point (A point) of a detecting resistance 5 and a focus coil 3 is inputted to a non-inverting input terminal of a differential amplifier 9, and to an inverting input terminal, the electric potential of an anode terminal (B point of a Zener diode 11 giving a reference voltage is inputted. The output of the differential amplifier 9 is connected to the base of a transistor 10 and set so that the electric potential of a A point and the electric potential of a B point can be always equal. Next, to supply a constant voltage to the C point, the electric potential of a dividing point (D point) is inputted to the non-inverting input terminal of the differential amplifier 8. To the inverting input terminal, the electric potential of an emitter (C point) of a transistor 7 to control the electric current is inputted. The output of the differential amplifier 8 is connected to the base of the transistor 7, and controls so that the voltage between (B-D) and the voltage between both ends of the detecting resistance can be equal. Thus, a constant electric current flows at focus coils 1-3 and a electro-magnetic focus is matched.

9. 发明专利

JPS6057785A TELEVISION CAMERA DEVICE 失效
公开(公告)号：JPS6057785A
公开(公告)日：1985-04-03
申请号：JP16501683
申请日：1983-09-09
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： MASUDA YUKIHIRO , ISHIBASHI SHIZUKA , TAKAHASHI KENJI , KODAMA TAKUMA , KUDOU KOUJI , HONBOU MASANORI
IPC分类号： H04N5/16 , H04N9/093
摘要： PURPOSE:To increase the amount of correction by modulating a video signal with a waveform obtained by differentiating a correction waveform and passing through a nonlinear operation circuit in order to correct shading by means of the digital registration correction of a television camera. CONSTITUTION:A data read from a digital memory 9 is converted into an analog signal by a D/A converter 8, the data is formed into a correction waveform through a smoothing circuit 7, the waveform is superimposed on a deflection waveform by an adder circuit 6 and fed to a deflection coil drive circuit 10. The smoothed waveform is differentiated by a differentiation circuit 46, the result is passed through the nonlinear operating circuit 7 and its output changes the gain of a gain control circuit 48 controlling the output from an image pickup tube 13. The shading generated in adjusting registration is corrected and the corrected amount is increased.

10. 发明专利

JPS5991775A DEFLECTION CIRCUIT FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPS5991775A
公开(公告)日：1984-05-26
申请号：JP20042582
申请日：1982-11-17
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： ISHIBASHI SHIZUKA , TAKAHASHI KENJI , MASUDA YUKIHIRO , KODAMA TAKUMA , KUDOU KOUJI
IPC分类号： H04N3/16 , H03K4/69
摘要： PURPOSE:To eliminate the need for a high voltage and to reduce power consumption accordingly by adopting advantages of two systems, switching system at the blanking period and class A or b amplifier at the scanning period. CONSTITUTION:A deflection coil 30 is driven by a differential amplifier 20 and transistors (TRs) 25, 27 for the scanning period. An input signal of the differential amplifier 20 in this case is a waveform as shown in Fig. (f) and the information and accuracy required for the deflection are provided. A pulse is applied to a gate terminal 32 so as to short-circuit an MOS TR31 for the blanking period. Thus, the energy stored in the deflection coil 30 is resonated with a capacitor 29 and a comparatively high voltage as shown in Fig.(g) is generated at a terminal 28. Since a current flowing to the capacitor 29 is as shown in Fig. (h), the resonance of the coil 30 and the capacitor 29 is stopped for the period from a time t2 to t3, i.e., scanning period by short-circuiting the TR31 only for the periods between time t1 to t2 and from t3 to t4.

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