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1. 发明专利

JP2514184B2 失效
公开(公告)号：JP2514184B2
公开(公告)日：1996-07-10
申请号：JP144086
申请日：1986-01-09
申请人： HITACHI LTD
发明人： FUNADA ETSUO , OOSAWA MICHITAKA
IPC分类号： H04N9/28

2. 发明专利

JPH0436636B2 失效
公开(公告)号：JPH0436636B2
公开(公告)日：1992-06-16
申请号：JP19151984
申请日：1984-09-14
申请人： HITACHI LTD
发明人： FUNADA ETSUO , OOSAWA MICHITAKA
IPC分类号： H04N9/28

3. 发明专利

JPH03135102A POWER AMPLIFIER 失效
公开(公告)号：JPH03135102A
公开(公告)日：1991-06-10
申请号：JP27158189
申请日：1989-10-20
申请人： HITACHI LTD
发明人： FUKUMA KOJI , FUNADA ETSUO
IPC分类号： H03F1/02 , H03F3/30
摘要： PURPOSE:To operate power voltage changeover normally and to prevent production of a distorted output wave by providing a path discharging the charge charged in a base-emitter capacitance of an output transistor (TR) being a component of an SEPP. CONSTITUTION:Resistors R3,R4 are respectively provided between a collector and ground of TRs Q1,Q3 being components of a Single End Push Pull (SEPP) circuit. Thus, A charge charged in a base-collector capacitance of the TRs Q1,Q3 is discharged by the resistors 3,4 and an output impedance of a signal source and power voltage changeover is normally operated because the collector voltage does not reach the power voltage. Moreover, a collector voltage of an output TR is energized by power voltages V1,V2 without fail, no distortion is caused in the output waveform.

4. 发明专利

JPH02177237A ELECTROMAGNETIC ELECTRON BEAN CONVERSION APPARATUS AND CONVERSION MAGNET THEREOF 失效
公开(公告)号：JPH02177237A
公开(公告)日：1990-07-10
申请号：JP33137488
申请日：1988-12-28
申请人： HITACHI LTD
发明人： FUNADA ETSUO
IPC分类号： H01J29/64 , H04N3/26
摘要： PURPOSE:To compensate, with high accuracy, decrease of magnetic force due to temperature increase of a permanent magnet by detecting change of the amount of magnetic flux in a converging magnet apparatus by a magnetic sensor and increasing/decreasing the amount of current flowing through an exciting coil. CONSTITUTION:A voltage produced by a magnet sensor and increasing with the increase of magnetic flux is integrated and averaged by a secular change-compensation circuit 21. The voltage thus obtained is applied to an inversion input terminal of a comparison amplifier 10 to be compared with a voltage of a power supply 9 applied to an noninversion input terminal thereof. Accordingly, the output of the compensation circuit 21 decreases as magnetic flux in a converging magnet apparatus 20 increases. While, the output of the compensation circuit 21 increases as magnetic flux in a converging magnet apparatus decreases. Thus, the compensation circuit 21 is sc operated that a current flowing through an exciting coil 2 decreases with increase of mean amount of magnetic flux in the apparatus 20, while the current flowing through the coil 2 increase with decrease of the mean amount of magnetic flux in the apparatus 20. Therefore, the mean amount of magnetic flux in the apparatus 20 is kept constant.

5. 发明专利

JPS63283296A DISPLAY MARKER FOR DIGITAL CONVERGENCE 失效
公开(公告)号：JPS63283296A
公开(公告)日：1988-11-21
申请号：JP11681787
申请日：1987-05-15
申请人： HITACHI LTD
发明人： FUNADA ETSUO
IPC分类号： H04N9/28 , H04N17/04
摘要： PURPOSE:To display a marker without changing the luminance of a grating pattern and the marker and to enable an observer to easily observe a grating point even if the marker is flickered by displaying the frame type marker surrounding the grating point of the grating pattern to be a convergence adjusting point. CONSTITUTION:When a marker horizontal position of a port P1 coincides with an output from a frequency dividing counter 12, a coincidence circuit 14 outputs a coincidence pulse (d). The pulse (d) outputs a signal (e) having right and left pulse width equal about a grating pattern vertical line signal (c) through a D.FF 16. The horizontal position and width of the marker are determined by the signal (e). A signal for determining the vertical position and width of the marker is obtained by counting an output signal (h) from a frequency dividing counter 13 by a counter 17 and outputting a coincidence pulse l from a coincidence circuit 15 based on coincidence between the marker vertical position of a port P2 and the output of the counter 17. An AND circuit 24 finds out AND operation between the advancing signal (h) with 14H phase and a delayed signal (j) with 14H phase based on the pulse l and a grating pattern horizontal line signal (i) to form signals (f), (g) to be the horizontal frames of the marker. Signals to be the vertical frames of the marker are formed by forming a pulse width signal (k) by a D.FF 20 and forming a marker vertical line signal by the AND circuit 24.

6. 发明专利

JPS5975776A Video signal processing circuit 失效
标题翻译：视频信号处理电路
公开(公告)号：JPS5975776A
公开(公告)日：1984-04-28
申请号：JP18600682
申请日：1982-10-25
申请人： Hitachi Ltd
发明人： OOSAWA MICHITAKA , YAMADA JIYUN , FUNADA ETSUO , MIYAJIMA HIROYUKI , KABUTO NOBUAKI
IPC分类号： H04N5/74 , H04N5/205 , H04N5/208
CPC分类号： H04N5/205
摘要： PURPOSE:To correct a flare, aperture effect, etc., which cause deterioration in display picture quality through an electric circuit by using a surface acoustic wave filter and a variable gain amplifier which have independently settable amplitude characteristics and phase characteristics in combination. CONSTITUTION:A video signal inputted to a video signal input terminal 17 is modulated to a carrier frequency that a filter with less phase distortion (e.g. surface acoustic wave filter denoted as SAW filter hereafter) requests, and divided into three frequency ranges by an SAW filter. Then, the signal is reconverted into a video signal of a base band by a demodulator 8 and its amplitude characteristics only are varied by the variable gain amplifier. In this case, the gain of an M range signal is unchanged and a large signal component between an L range and an H range varies with a control signal. Deterioration in picture quality due to a flare increases generally with screen brightness, so the control signal is obtained by detecting the screen brightness optically or by detecting the high voltage output power source of a high voltage power source (e.g. FBT) or a video output voltage.
摘要翻译：目的：通过使用具有可独立设定的振幅特性和相位特性的表面声波滤波器和可变增益放大器，来校正通过电路导致显示图像质量劣化的光斑，光圈效应等。构成：输入到视频信号输入端子17的视频信号被调制成具有较少相位失真的滤波器（例如，以下表示为SAW滤波器的表面声波滤波器）请求的载波频率，并且通过SAW滤波器被分成三个频率范围。然后，该信号被解调器8再转换成基带的视频信号，并且其幅度特性仅由可变增益放大器改变。在这种情况下，M范围信号的增益不变，L范围和H范围之间的大信号分量随控制信号而变化。由于闪光引起的图像质量的恶化通常随屏幕亮度而增加，因此通过光学检测屏幕亮度或通过检测高压电源（例如FBT）的高压输出电源或视频输出电压来获得控制信号。

7. 发明专利

JPH0636601B2 失效
公开(公告)号：JPH0636601B2
公开(公告)日：1994-05-11
申请号：JP12976785
申请日：1985-06-17
申请人： HITACHI LTD
发明人： OSAWA MICHITAKA , FUNADA ETSUO
IPC分类号： H04N9/28

8. 发明专利

JPH0543093B2 失效
公开(公告)号：JPH0543093B2
公开(公告)日：1993-06-30
申请号：JP19317685
申请日：1985-09-03
申请人： HITACHI LTD
发明人： SATO GOZO , KABUTO NOBUAKI , INOE FUMIO , ANDO KUNIO , FUNADA ETSUO
IPC分类号： H04N9/31 , G02F1/133 , G09G3/18 , H04N9/12 , H04N9/30

9. 发明专利

JPH03141711A RUSH CURRENT PREVENTING CIRCUIT FOR POWER AMPLIFIER 失效
公开(公告)号：JPH03141711A
公开(公告)日：1991-06-17
申请号：JP27837489
申请日：1989-10-27
申请人： HITACHI LTD
发明人： FUNADA ETSUO , FUKUMA KOJI
IPC分类号： H03F1/00 , H03F3/30
摘要： PURPOSE:To prevent a rush current without using a relay when a power source is turned on, to reduce cost and to improve reliability by providing a means to cut off a differential amplifier circuit when the power source is turned on. CONSTITUTION:When the power source is turned on, a transistor Tr Q9 is biased in a regular direction through a resistor R12 and turned to an ON state and a Tr Q10 is turned to the ON state as well. Accordingly, Tr Q3, Tr Q4, Tr Q1 and Tr Q2 constituting the differential amplifier circuit are cut off. Since the base of a Tr Q6 forming an SEPP (Single Push-Pull) circuit is grounded through a diode D7, a rush current preventing circuit 10 is operated. Next, an electric charge is charged to a capacitor C1 and a Tr Q8 is turned to the ON state. At such a time, the Tr Q9 and Tr Q10 are turned to a cut-off state and the circuit 10 is released. Then, a CY driving amplifier is biased to a normal state and normally operated. Therefore, the rush current is prevented without using the relay when the power source is turned on, the cost is decreased and further the reliability can be improved.

10. 发明专利

JPS61288590A DIGITAL CONVERGENCE CORRECTING DEVICE 失效
公开(公告)号：JPS61288590A
公开(公告)日：1986-12-18
申请号：JP12976785
申请日：1985-06-17
申请人： HITACHI LTD
发明人： OSAWA MICHITAKA , FUNADA ETSUO
IPC分类号： H04N9/28
摘要： PURPOSE:To attain a highly accurate correction by employing H-BLK and V-BLK pulses on a CR screen as a reference signal. CONSTITUTION:H-BLK and V-BLK pulse signals are not only made to the reference signal for the generating circuit 14 of a cross-hatch displayed on a screen at the time of convergence adjustment, but also multiplied by the number of adjusting points. Moreover they are made to the reference signal at the time of generating an address signal with respect to a frame memory 1 by means of address setting circuits 9 and 11. Correction data at the adjusting point on the CRT screen is outputted from the frame memory 1 with the aid of said address signal in synchronization with a deflecting current, and is inputted to one multiplication-type DAC 3 through the other multiplication-type DAC 3A and a delay circuit 2. Each output is added by an adder circuit 4, and a distance between adjusting points in the vertical direction is interporated. Finally its result is outputted through a low-pass filter 5.

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