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1. 发明专利

JPS5488052A PREEAMPLIFIER FOR TELEVISION CAMERA 失效
公开(公告)号：JPS5488052A
公开(公告)日：1979-07-12
申请号：JP15553077
申请日：1977-12-26
申请人： HITACHI ELECTRONICS , HITACHI LTD , JAPAN BROADCASTING CORP
发明人： ONO YUKIO , UKIGAYA FUMIO , SATOU KAZUHIRO , OZAWA NAOKI , SOUKEI HIROICHI , OONISHI KAZUNORI , MOCHIZUKI TOORU , WAKUI KOUTAROU
IPC分类号： H03F3/183 , H03F1/34 , H03F3/34 , H03F3/343
摘要： PURPOSE:To prevent the abnormal operation of the pre-amplifier circuit and thus to secure the amplification at the normal operation time at all times by adding the circuit which controls the bias at the constant current type amplification part to prevent the circuit operation from being steady at the point of the abnormal operation and thus eliminating the abnormal operation of the pre-amplifier circuit. CONSTITUTION:In the direct-coupled pre-amplifier containing the DC negative feedback resistance to amplify the signal sent from the pickup tube of the TV camera, diode 10 and DC power source 11 are connected to the input terminal of constant current type is inverse amplifier 9 of the final step. Then the voltage of power source 11 is set higher than the input voltage of amplifier 9 when the pre- amplifier has the normal operation and lower then the input voltage at the abnormal operation time respectively. The bias voltage is lowered down to the voltage of power source 11 by diode 10 in order to maintain the operation of the preamplifier at the normal action time when the power source is supplied abnormally.

2. 发明专利

JPS5488022A PREEAMPLIFIER FOR TELEVISION CAMERA 失效
公开(公告)号：JPS5488022A
公开(公告)日：1979-07-12
申请号：JP15553177
申请日：1977-12-26
申请人： JAPAN BROADCASTING CORP , HITACHI LTD , HITACHI ELECTRONICS
发明人： OZAWA NAOKI , SATOU KAZUHIRO , OONISHI KAZUNORI , MOCHIZUKI TOORU , WAKUI KOUTAROU , ONO YUKIO , UKIGAYA FUMIO , SOUKEI HIROICHI
IPC分类号： H04N5/18 , H04N5/14 , H04N5/16
摘要： PURPOSE:To secure the constant output voltage for the pre-amplifier by detecting the output voltage of the flyback time for the output of the pre-amplifier or the video process circuit and having the negative feed back of the difference power between the detection voltage and the reference voltage to the pre-amplifier via the high gain differential amplifier. CONSTITUTION:The output signal of pickup tube 1 is led to video process circuit 8 via pre-amplifier 6 and then delivered 4. In this case, sampling 9 is given to the flyback time output voltage of the output of amplifier 6 or circuit 8 to have a comparison with the reference voltage given from reference voltage generator circuit 11. And the difference voltage is fed back negatively to the input side of amplifier 6 via high gain differential amplifier 12. In this way, the pre-amplifier output voltage can be kept constant accurately within the effective temperature range of the TV camera.

3. 发明专利

JPS5488017A GAIN CONTROL CIRCUIT 失效
公开(公告)号：JPS5488017A
公开(公告)日：1979-07-12
申请号：JP15552977
申请日：1977-12-26
申请人： HITACHI ELECTRONICS , HITACHI LTD , JAPAN BROADCASTING CORP
发明人： UKIGAYA FUMIO , ONO YUKIO , SATOU KAZUHIRO , OZAWA NAOKI , SEKI KUNIO , SOUKEI HIROICHI , MOCHIZUKI TOORU , OONISHI KAZUNORI , WAKUI KOUTAROU
IPC分类号： H03G3/30
摘要： PURPOSE:To improve the linearity of the gain-controlled output signal as well as to reduce the power consumption of the circuit by setting the output impedance of the constant voltage source to a fixed low level regardless of the input signal. CONSTITUTION:The input signal to be supplied to the base of transistor TR11 is voltage-divided by the emitter output and via resistance 12 and 18 plus TR19 to be supplied to the base of TR20. Accordingly, the internal impedance of TR20 is varies by the input signal, and the collector current is controlled by the input signal with its scale proportional to the input signal current. Then the input signal level increases, and the internal impedance of TR20 is lowered by the increment of the signal current flowing through gain variable resistance 13, with no change of the emitter potential and current given to TR14. As a result, the power consumption can be reduced for the circuit without imparing the linearity of the gain-controlled output signal.

4. 发明专利

JPS5495119A CONTROL SYSTEM FOR WHITE COMPRESSION CHARACTERISTIC OF COLOR TELEVISION CAMERA 失效
公开(公告)号：JPS5495119A
公开(公告)日：1979-07-27
申请号：JP198878
申请日：1978-01-13
申请人： HITACHI ELECTRONICS , HITACHI LTD , JAPAN BROADCASTING CORP
发明人： UKIGAYA FUMIO , ONO YUKIO , SATOU KAZUHIRO , OZAWA NAOKI , SOUKEI HIROICHI , OONISHI KAZUNORI , MOCHIZUKI TOORU , WAKUI KOUTAROU
IPC分类号： H04N5/228 , H04N9/68 , H04N9/73
摘要： PURPOSE:To obtain a good-color reproducibility picture quality with eliminating the shift of white balance in a highlight video signal part by interlocking a white compression circuit with the white balance adjustment companied with the change of the color temperature of a pickup scene. CONSTITUTION:In respect to incident light X2, channel B has a video level lower than G, and channel R has a video level lower than G, and then, the channel level relation is R1

5. 发明专利

JPS5488023A BEAM CURRENT CONTROL SYSTEM FOR PICKUP TYPE TELEVISION CAMERA DEVICE 失效
公开(公告)号：JPS5488023A
公开(公告)日：1979-07-12
申请号：JP15553277
申请日：1977-12-26
申请人： JAPAN BROADCASTING CORP , HITACHI LTD , HITACHI ELECTRONICS
发明人： OZAWA NAOKI , SATOU KAZUHIRO , OONISHI KAZUNORI , MOCHIZUKI TOORU , WAKUI KOUTAROU , UKIGAYA FUMIO , ONO YUKIO , SOUKEI HIROICHI
IPC分类号： H04N5/228 , H01J29/52
摘要： PURPOSE:To obtain the optimum beam current for each pickup tube by turning on the control to secure the equal reference current for the control circuit system which drives three pieces of the pickup tube and then turning off the control to vary the polarity and the amplitude of the pulse generator output to set them to the different value from the reference voltage. CONSTITUTION:The beam current emitted from cathode electrode 2 is accelerated by acceleration electrode 4, and part of the current is turned to beam current Ib and goes toward photoelectric conversion film surface 5 to be drawn out in the form of the signal current. Here switch 12 is turned toward point (a) to turn on the control, and thus the equal reference current is obtained for each control circuit system which drives three pieces of the pickup tube. Then switch 12 is turned toward point (b) to turn off the control, and thus the polarity and the amplitude are changed for the pulse signal obtained from pulse generator 13. As a result, the beam current can be set to the different value from the reference current at the control time. In this way, the optimum beam current can be obtained for each pickup tube in both the on and off control system.

6. 发明专利

JPS6019383A COLOR TELEVISION CAMERA 失效
公开(公告)号：JPS6019383A
公开(公告)日：1985-01-31
申请号：JP12601183
申请日：1983-07-13
申请人： HITACHI LTD
发明人： SOUKEI HIROICHI
IPC分类号： H04N9/083
摘要： PURPOSE:To obtain high color resolution by providing an automatic skew correcting circuit where the scanning direction of an electron beam is symmetrical to the right and left to a stripe filter and 90 deg. phase shift is attained to prevent generation of color mixture between R and B signals. CONSTITUTION:If a relative angle between an electron beam scanned by an electrostatic deflection electrode of an image pickup tube 3 and a color separation stripe filter is caused because of manufacture error, an error signal impossible for correlation is generated. This error signal is detected for vertical and horizontal directions by an H phase error detector 31 and a V phase error detector 32, and after the result is digitized by A/D converters 33, 34, the amount of correction is counted by a CPU35 and converted into an analog signal by D/A converters 36, 37. After the correction command signal is amplified by phase error amplifiers 39, 41, the result is applied to horizontal and vertical skew correcting circuits 52, 53 of electrostatic deflection circuits, the deflection angle of the electron beam is corrected so as to correct the color separation stripe filter 25 and the scanning beam in a way that they are shifted by just 90 deg..

7. 发明专利

JPS56117481A COLOR TELEVISION CAMERA 失效
公开(公告)号：JPS56117481A
公开(公告)日：1981-09-14
申请号：JP2050980
申请日：1980-02-22
申请人： HITACHI LTD
发明人： SOUKEI HIROICHI
IPC分类号： H04N5/21 , H04N5/217 , H04N9/04
摘要： PURPOSE:To eliminate a flicker phenomenon, by eliminating a difference of frequency between the vertical synchronous signal and a commercial power source through a differential subtractor circuit. CONSTITUTION:The signal Y supplied from the preamplifier 2 is delayed by the delay circuit 6 and then applied to the low pass filter 15 of 3MHz and the band pass filter 16. A differential subtraction is given through the 50Hz flicker eliminating circuit 18 between the luminance signal supplied from the filter 15 and containing the commercial power source frequency 50Hz and the signal obtained by giving a wave detection through the wave detecting circuit 17 to the space frequency obtained through the filter 16 each. The signal received a differential subtraction is then supplied to the process circuit 9. In such way, the flicker phenomenon caused by the commercial power source frequency and emerging to a reproduced picture can be eliminated.

8. 发明专利

JPS53117926A SCANNING BEAM CONTROL SYSTEM FOR PICKUP TUBE 失效
公开(公告)号：JPS53117926A
公开(公告)日：1978-10-14
申请号：JP3220577
申请日：1977-03-25
申请人： HITACHI LTD
发明人： SOUKEI HIROICHI
IPC分类号： H04N5/228 , H01J29/52
摘要： PURPOSE:To avoid the beam lacking state in case a high-luminance subject is picked up, by applying the high frequency pulse of a fixed frequency to the cathode electrode to modulate the scanning beam and also applying the control pulse produced by the highlight beam to the beam control electrode.

9. 发明专利

JPS57164669A AUTOMATIC BEAM CONTROLLING METHOD FOR IMAGE PICKUP TUBE 失效
公开(公告)号：JPS57164669A
公开(公告)日：1982-10-09
申请号：JP4930981
申请日：1981-04-03
申请人： HITACHI LTD
发明人： SOUKEI HIROICHI
IPC分类号： H04N5/228 , H04N5/34
摘要： PURPOSE:To prevent the lowering in picture quality due to excessive incident quantity of light, by changing a fixed bias point and a beam control signal in accordance with the incident quantity of light to an image pickup tube and setting a fixed beam quantity being a reference less. CONSTITUTION:An automatic variable bias point 6 changing an off-time (t) of a beam blanking pulse 1 in accordance with incident quantity of light is set to a standard signal level when the normal incident quantity of light is less, and the fixed beam quantity is increased as the quantity of light increases. Thus, since the beam follows automatically, the picture quality can remarkably be increased.

10. 发明专利

JPS56152141A IMAGE PICKUP TUBE 失效
公开(公告)号：JPS56152141A
公开(公告)日：1981-11-25
申请号：JP5412880
申请日：1980-04-25
申请人： HITACHI LTD
发明人： SOUKEI HIROICHI
IPC分类号： H01J31/38 , H01J29/48 , H01J29/62 , H01J29/88
摘要： PURPOSE:To improve peripheral resolution, by depositing conductive film on the inside of a bulb wall and using it as a grid formed in an electrostatic focusing lens. CONSTITUTION:Conductive film electrodes 21, 22, 23 are formed by spreading metalic thin film over the inside wall of a bulb 5 through vacuum evaporation and separating it by chemical etching. On the other hand, contact terminals 24 in which small pieces of conductive glass or metallic foil are enclosed are respectively arranged on the conductive film electrodes 21, 22, 23 through the tube wall of the bulb 5. Adequate voltage is impressed on each electrode of terminals 24 by means of springs 26 attached on a voltage impressing support 25 arranged on the inside of a deflecting coil 20 and electrodes 21, 22, 23 are used as an electrostatic forcusing lens. Thereby astigmatism along the periphery of a picture can be eliminated because it is possible to make this tube of a small size act as an electrostatic focusing lens of a diameter larger than that expected from its external shape.

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