公开(公告)号：JPS6373878A

公开(公告)日：1988-04-04

申请号：JP21566186

申请日：1986-09-12

Applicant: SONY CORP

Inventor： HATADA HIDEO

IPC: H02M3/28 ,  H02M3/335 ,  H04N3/18

Abstract: PURPOSE:To reduce loss and to improve high-speed follow-up feature, by controlling the output pulse width with the detection signal of voltage obtained at the output electrode of the first switching element, and by controlling the second switching element with the output pulse. CONSTITUTION:A diode 3 for damper and a capacitor 4 for resonance are connected in parallel to a transistor 1, to which a series circuit is connected in parallel which is made up of a capacitor 5, a choke coil 6 and a diode 7. Furthermore, a power source 9 is connected through the primary coil 8a of a flyback transformer 8. A transistor 13 is switched ON through a PWM circuit 12 at the secondary side output of the transformer 8. At this moment, by exchanging the position of the coil 6 for the capacitor 5, the series system of a diode 15 and a resistance 16 is connected between their contact d and an earth. Thus, the ringing voltage set up when the diode is OFF appears at the contact d of the coil 6 and capacitor 5, so that the current can flow to the diode 15 and the resistance 16.

公开(公告)号：JPS6253997B2

公开(公告)日：1987-11-12

申请号：JP2564278

申请日：1978-03-07

Applicant: SONY CORP

Inventor： SAWARA HIROSHI ,  KUMAGAI TOORU ,  HATADA HIDEO

IPC: H04N9/29

公开(公告)号：JPS5915380A

公开(公告)日：1984-01-26

申请号：JP12493882

申请日：1982-07-17

Applicant: Sony Corp

Inventor： HATADA HIDEO

IPC: H04N5/59

CPC classification number: H04N5/59

Abstract: PURPOSE:To keep the set luminance, by comparing the voltage varying in response to the beam current of a CRT with the mean level voltage of the video signal supplied to the CRT. CONSTITUTION:The beam current detecting voltage Vb obtained at the joint B between a beam current detecting resistance 15 and an FBT12 is supplied to the input at one side of a comparing part 18. While the mean level voltage Va of a video signal obtained at a joint A is supplied to the other input of the part 18 via a voltage converting part 21. The voltage Vb is compared with the voltage Va at the part 18, and this comparison output SC is supplied to the base of a transistor TR22. The TR22 forms a bias voltage part to the 1st grating electrode 6 of a CRT1, and the bias voltage Vg is supplied to the electrode 6. The voltage Vg is varied in response to the output SC. Therefore the CRT-electrode 6 bias voltage is changed in response to the output SC between a cathode 2 of the CRT1 and the electrode 6.

Abstract translation: 目的：通过将响应于CRT的束电流的电压变化与提供给CRT的视频信号的平均电平进行比较来保持设定的亮度。 结构：在光束电流检测电阻15和FBT12之间的接头B处获得的光束电流检测电压Vb被提供给比较部分18的一侧的输入端。虽然在a处获得的视频信号的平均电平电压Va 接头A通过电压转换部件21被提供给部件18的另一个输入端。电压Vb与部件18的电压Va进行比较，该比较输出SC被提供给晶体管TR22的基极。 TR22与CRT1的第一栅格电极6形成偏置电压部分，偏置电压Vg被提供给电极6.电压Vg响应于输出SC而变化。 因此，CRT电极6的偏置电压响应于CRT1的阴极2和电极6之间的输出SC而改变。

公开(公告)号：JPS5875971A

公开(公告)日：1983-05-07

申请号：JP17475081

申请日：1981-10-31

Applicant: SONY CORP

Inventor： HATADA HIDEO

IPC: H04N3/23 ,  H04N3/233

Abstract: PURPOSE:To obtain a correcting circuit for a left and right pincushion distortion which prevents the generation of nonlinear distortion by detecting a parabolic voltage generated in a horizontal period at the connection point between the controlled coil of a saturable reactor and a capacitor for S-shaped correction. CONSTITUTION:A parabolic voltage generated in a horizontal period at the connection point between the controlled coil 3b of a saturable reactor 2 and a capacitor 5 is detected by a detecting circuit 8 to obtain an envelope voltage. This envelope voltage is supplied to a control circuit 6 to make a level comparison with a parabolic voltage in a vertical period applied from a terminal 9 to the control circuit 6. The result of the level comparion is supplied to the control coil 3a of the saturable reactor 2, whose characteristics are controlled to prevent the generation of nonlinear distortion.

公开(公告)号：JPS5850864A

公开(公告)日：1983-03-25

申请号：JP9269782

申请日：1982-05-31

Applicant: SONY CORP

Inventor： HATADA HIDEO

IPC: G01R13/22 ,  G01R31/24 ,  H04N17/04

Abstract: PURPOSE:To obtain the accurate waveform of a correction signal through simple constitution by measuring the level, etc., of the correction signal with a signal from a photodetector. CONSTITUTION:A horizontal and a vertical deflection signal from a deflecting circuit 1 are supplied to the deflection coil 3 of a picture tube 2. Then, part of the vertical deflection signal is supplied to a parabolic wave generating circuit 4, a parabolic wave signal Sa from which is supplied to a deflection coil 5 for correction. This parabolic wave signal Sa is supplied to a two-phenomenon oscilloscope 6. Further, a detection signal Sb from a photodetector 7 is supplied to the oscilloscope 6 through an attenuator 8. So as a point where the photodetector 7 is in contact is an accurate landing state, the parabolic wave generating circuit 4 is adjusted and the level B at the intersection of the rising signal Sb and signal Sa is read to measure the necessary amount of correction at the point. Further, the distance l from the beginning of the parabolic signal Sa to the rising point of the signal Sb is measured to obtain the accurate position of a measurement point on the deflection signal.

公开(公告)号：JPS54121620A

公开(公告)日：1979-09-20

申请号：JP2905478

申请日：1978-03-14

Applicant: SONY CORP

Inventor： SAWARA HIROSHI ,  KUMAGAI TOORU ,  HATADA HIDEO

IPC: H04N9/29

Abstract: PURPOSE:To eliminate the mislanding by carrying out the magnetic erasion only when the color TV picture receiver installed inside the mobile object is turned to the specified direction. CONSTITUTION:The detection voltage VEW of lateral magnetic field detector circuit 1 features the waveform of the sine wave which features the positive and negative peaks when the color TV picture receiver turns to the east and west respectively. While detection voltage VNS of axial direction magnetic field detector circuit 2 features the waveform of the sine wave featuring the positive and negative peaks in the south and north directions each. Then VEW and VNS are applied to direction deciding circuit 3 to detect the turning to the east, and at this moment the magnetic erasion is performed via magnetic erasion circuit 4.