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1. 发明专利

JP2588599B2 失效
公开(公告)号：JP2588599B2
公开(公告)日：1997-03-05
申请号：JP28238388
申请日：1988-11-10
申请人： HITACHI LTD
发明人： SAKURAI SOICHI , OOSAWA MICHITAKA , OKUYAMA NORITAKA , WATANABE TOSHIMITSU , NAKAHARA MASAKI , TAJIMA HISANOBU , SHIOMI MAKOTO
IPC分类号： H01J29/54 , H01J29/64 , H01J29/76 , H04N9/28

2. 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

3. 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

4. 发明专利

JPH0434870B2 失效
公开(公告)号：JPH0434870B2
公开(公告)日：1992-06-09
申请号：JP9230183
申请日：1983-05-27
申请人： HITACHI LTD
发明人： OOSAWA MICHITAKA , MYAJIMA HIROYUKI , KIMURA JUICHIRO
IPC分类号： H04N5/57 , H04N9/64 , H04N9/72 , H04N9/73

5. 发明专利

JPH0228948B2 失效
公开(公告)号：JPH0228948B2
公开(公告)日：1990-06-27
申请号：JP6057085
申请日：1985-03-27
申请人： HITACHI LTD
发明人： KIMURA JUICHIRO , OOSAWA MICHITAKA
IPC分类号： H04N5/18

6. 发明专利

JPS641999B2 失效
公开(公告)号：JPS641999B2
公开(公告)日：1989-01-13
申请号：JP4686279
申请日：1979-04-17
申请人： HITACHI LTD
发明人： OOSAWA MICHITAKA , MATSUMOTO SHUZO , MAEKAWA HITOSHI
IPC分类号： H04N9/73 , H04N9/64

7. 发明专利

JPS60107983A LUMINANCE ADJUSTING CIRCUIT 失效
公开(公告)号：JPS60107983A
公开(公告)日：1985-06-13
申请号：JP21400583
申请日：1983-11-16
申请人： HITACHI LTD
发明人： MIYAJIMA HIROYUKI , OOSAWA MICHITAKA
IPC分类号： H04N5/57
摘要： PURPOSE:To eliminate the luminance change of a luminance adjusting circuit due to ambient temperature by changing a current flowing to the primary control element of photocoupler of a DC superimposing circuit in response to the ambient temperature. CONSTITUTION:When ambient temperature rises, a resistor R1 of the photocoupler 7 is increased and a current flowing to the primary control element is decreased apparently. Since the secondary resistance R3 of the photocoupler 15 having the same temperature characteristic is increased also in this case, the current flowing to a fixed resistor R4 is increased thereby reducing the value of the resistor R1. Thus, even if the ambient temperature rises, the resistance R1 of the photocoupler 7 is controlled in a direction whose increment is totally less. When the ambient temperature is lowered, the secondary resistance R1 of the photoocupler 7 is decreased and the primary current is increased apparently. Since the secondary resistance R3 of the photocoupler 15 is also decreased in this case, the current flowing to the resistor R4 is decreased and the resistor R1 is controlled so as to be increased.

8. 发明专利

JPS59175284A Blanking circuit 失效
标题翻译：空白电路
公开(公告)号：JPS59175284A
公开(公告)日：1984-10-04
申请号：JP4878683
申请日：1983-03-25
申请人： Hitachi Ltd
发明人： OOSAWA MICHITAKA
IPC分类号： H04N3/24
CPC分类号： H04N3/24
摘要： PURPOSE:To attain simultaneously broad band characteristics and power saving of a driving circuit by inputting a blanking pulse to a base of a conrrol transistor (TR) of a constant voltage power supply block for setting cutoff voltage. CONSTITUTION:The blanking pulse is inputted to the base of a conrol TR2 of the constant voltage power supply block for setting cutoff voltage to cut off the control TR2 at blanking period. When the control TR2 becomes the cutoff state, a voltage ECO becomes a voltage drop's share by resistors R1, R2 for setting cutoff voltage and the blanking pulse having a large level is added to a video signal outputted from the driving circuit.
摘要翻译：目的：通过向定电压块的控制晶体管（TR）的基极输入消隐脉冲以设定截止电压，同时获得驱动电路的宽带特性和功率节省。构成：将消隐脉冲输入到恒压电源块的控制TR2的基极，用于设定截止电压以在消隐期间切断控制TR2。当控制TR2变为截止状态时，电压ECO通过电阻器R1，R2用于设置截止电压而成为电压降，并且具有大电平的消隐脉冲被加到从驱动电路输出的视频信号上。

9. 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。

10. 发明专利

JPS5873288A COMPENSATING CIRCUIT FOR SHARPNESS 失效
公开(公告)号：JPS5873288A
公开(公告)日：1983-05-02
申请号：JP17077781
申请日：1981-10-27
申请人： HITACHI LTD
发明人： OOSAWA MICHITAKA
IPC分类号： H04N5/208 , H04N5/14
摘要： PURPOSE:To obtain a picture with high quality, by peaking a signal component of a prescribed frequency band in response to the signal component. CONSTITUTION:A video signal from a terminal 9 is applied to a delay circuit 10 and a BPF11. A peaking circuit 15 consists of resistors R4, R5, a variable circuit 14, and reactors L2, L3. The BPF11 has a pass band at a frequency band of peaking at the circuit 15. The level of the output of the BPF11 is adjusted at a resistor 12, the output is applied to a level detection circuit 13, where the level of high frequency is detected. The output of the circuit 13 controls the resistance value of the resistor 14. A signal delayed at the circuit 10 is applied to a transistor 2 of the circuit 15.

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