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1. 发明专利

JPH07107337A SHADING CORRECTING CIRCUIT 失效
公开(公告)号：JPH07107337A
公开(公告)日：1995-04-21
申请号：JP24787693
申请日：1993-10-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHIBATA SHINICHI , SAKAI SATORU
IPC分类号： H04N5/16 , H04N5/57
摘要： PURPOSE:To provide a shading correcting circuit in which the rate of the brightness of the central part and peripheral part of a screen can not be changed, and the uniformity of luminance can be maintained even at the time of brightness change by superimposing a bright pulse on a video signal, and clamping the video signal at the bright pulse top. CONSTITUTION:The bright pulse is superimposed on an input video signal 11 by a bright pulse superimposing circuit 12 in the blanking period of the video signal. Then, the video signal is clamped at the part of the bright pulse(bright pulse top) by a clamp circuit 13. A correction waveform signal synchronizing with the input video signal 11 is outputted from a correction waveform signal generating circuit 14. Then, the correction waveform signal is clamped by a clamp circuit 15 in the blanking period. The clamped correction waveform signal and the video signal clamped at the bright pulse top are inputted to a multiplying circuit 16, and multiplied, and a shading-corrected output video signal 17 is obtained.

2. 发明专利

JPH0250647B2 失效
公开(公告)号：JPH0250647B2
公开(公告)日：1990-11-05
申请号：JP26383984
申请日：1984-12-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SAKAI SATORU , NANBAE MITSUO
IPC分类号： H03F3/34 , G11B19/20 , H03F3/04 , H03F3/68

3. 发明专利

JPH02886B2 失效
公开(公告)号：JPH02886B2
公开(公告)日：1990-01-09
申请号：JP18333583
申请日：1983-09-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMASHITA AKIRA , SAKAI SATORU , UEDA MINORU , IWAO TOYOHIRO
IPC分类号： H03F3/343 , H03F3/34 , H04N3/16

4. 发明专利

JPS6260362A DEFLECTION AMPLIFIER CIRCUIT 失效
公开(公告)号：JPS6260362A
公开(公告)日：1987-03-17
申请号：JP19974585
申请日：1985-09-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SAKAI SATORU
IPC分类号： H04N3/16
摘要： PURPOSE:To reduce the power loss of a bias circuit by forming a bias current control voltage formed by supervising a differentiation voltage being the differentiation of a step wave signal onto a DC voltage, using the superimposed voltage at the trailing period of the step wave signal and only the DC voltage during the other periods so as to flow a bias current of an amplifier circuit. CONSTITUTION:A rising step wave deflection signal 15 is inputted also to a differentiation circuit 17, where a positive differentiation pulse is formed and it is inputted to a pulse amplifier 19, in which a DC voltage DELTAV is superimposed and the result is inputted to a base of a transistor (TR) 22. Further, a falling step wave deflection signal 16 is inputted to a differentiation circuit 17', since the differentiation pulse at the trailing period is outputted at a point B of the base of a TR 22', the voltage waveform at the point B is shown in figure (d). Figures (a), (c) show an output voltage waveform at output terminals 12, 12', the current of the bias circuit is increased at the trailing period and the current of the bias circuit is decreased during the leading period an the flat period so as to largely reduce the mean current of the bias circuit as a whole.

5. 发明专利

JPS612408A DC AMPLIFIER CIRCUIT 失效
公开(公告)号：JPS612408A
公开(公告)日：1986-01-08
申请号：JP12307484
申请日：1984-06-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMASHITA AKIRA , SAKAI SATORU
IPC分类号： H03F3/18 , H03F1/30
摘要： PURPOSE:To obtain a DC amplifier circuit reduced at its temperature drift by constituting said circuit of a serial circuit consisting of a transistor (TR) operating at a low voltage, the 1st TR having complementary characteristic and operating at a low voltage and the 2nd TR bearing the greater part of electric power to be consumed at a high voltage resistance. CONSTITUTION:The 1st TR11 is a low voltage resistor TR having complementary characteristics to a TR5 and a TR12 is characterized by high voltage resistance and high power consumption. If the resistance values of resistors 6, 8 are fixed so that the emitter current of the TR5 is almost equal to that of the TR11, the voltage between the base and emitter of the TR11 can be almost completely compensated because the TR11 has the complementary characteristics to the TR5 and the power consumption of both the TRs 5, 11 is almost equal since almost the same voltage is applied between the collectors and emitters of both the TRs 5, 6. Consequently, the temperature drift of an output voltage can be extremely reduced.

6. 发明专利

JPS60246182A PICTURE DISPLAY DEVICE 失效
公开(公告)号：JPS60246182A
公开(公告)日：1985-12-05
申请号：JP10217584
申请日：1984-05-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： UEDA MINORU , MASUDA MITSUYA , IWAO TOYOHIRO , YAMASHITA AKIRA , SAKAI SATORU
IPC分类号： H04N5/68 , G09G1/00 , G09G1/20 , G09G1/28 , H04N3/26 , H04N5/66 , H04N9/16
摘要： PURPOSE:To attain double density effect by changing a vertical focus independently of horizontal focus so as to apply loose vertical focus at non-interlacing and bury the space between horizontal lines in a pseudo way. CONSTITUTION:A vertical deflection signal is fed to the base of a transistor (Tr) Tr1 and a Tr2 amplifies the said signal. In order to change the vertical focus at interlacing and non-interlacing, a switch 50 is connected to a bias terminal B of the Tr2 and the switch 50 and resistors r8, r9, r10 change the bias voltage. When the vertical deflection signal VN+,N- in waveform diagram is a waveform at normal focusing (at interlacing), a mean value VFN of both signals is a focus voltage, and it is changed into a focus voltage VFN, as a waveform shown in broken lines at a non-interlacing so as not to change the deflection sensitivity of the signals VN+', VN-' while keeping the voltage difference of both the signals. Thus, the space between the horizontal lines is buried in a pseudo way at the non-interlacing.

7. 发明专利

JPS59200B2 JPS59200B2 - 失效
公开(公告)号：JPS59200B2
公开(公告)日：1984-01-05
申请号：JP2556578
申请日：1978-03-06
申请人： Matsushita Electric Ind Co Ltd
发明人： SASABE KAORU , ISODA MIKIO , YAMASHITA AKIRA , SAKAI SATORU
IPC分类号： H04H1/00 , H04H20/48 , H04S5/00
CPC分类号： H04H20/48

8. 发明专利

JPS54121004A AURAL SIGNAL TRANSMITTING DEVICE 失效
公开(公告)号：JPS54121004A
公开(公告)日：1979-09-19
申请号：JP2916278
申请日：1978-03-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ISODA MIKIO , SASABE KAORU , YAMASHITA AKIRA , SAKAI SATORU
IPC分类号： H04N5/60 , H04H1/00 , H04H20/48 , H04S1/00 , H04S5/00
摘要： PURPOSE:To enable the hearing of the monaural signal through the stereo receiving device by converting the monaural signal into the false enlarged sound image signal and then transmitting it via the electric wave after erasing the aural frequency band and then piling the mike output. CONSTITUTION:The opposite phase is given at phase inverting circuit 3 only to the low-band component for the signal sent from main aural signal source 1 and then applied to amplitude modulator 4 in order to give amplitude modulation to the subcarrier signal. The signal from source 1 is also applied to high-band filter 10 to be changed to the opposite phase through phase inverting circuit 11 as well as to undergo the amplitude modulation for the subcarrier signal at amplitude modulator 13. The amplitude-modulated signal is then compounded at compounding unit 6 to be emitted in the form of the electric wave. Accordingly, both the high and low band compoenets are reproduced via the right and left channels of the stereo device with closure of switch 9, thus obtaining the double channel stereophonic sound in an artificial way. Furthermore, the mike mixing becomes possible when the cut-off frequency is selected properly for the both filters 2 and 10.

9. 发明专利

JPS54117602A SOUND SIGNAL TRANSMISSION UNIT 失效
公开(公告)号：JPS54117602A
公开(公告)日：1979-09-12
申请号：JP2556578
申请日：1978-03-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SASABE KAORU , ISODA MIKIO , YAMASHITA AKIRA , SAKAI SATORU
IPC分类号： H04H1/00 , H04H20/48 , H04S5/00
摘要： PURPOSE:To obtain a stereophonic feeling in a FM broadcasting by transmitting monophonic sound signals after converting them to false extended sound image signals. CONSTITUTION:Main sound signal M consisting of monophonic sound signal 5 is generated, and an auxiliary sound modulation wave signal obtained by amplitude- modulating sub-carrier 10 in 9 by auxiliary sound signal S consisting of the sound signal, which is obtained by delaying signal 5 in 6 at a fixed time, is generated, and further, a pilot signal for demodulating the sub-carrier is generated in 12. Then, the composite signal where signal M, the auxiliary sound modulation wave signal and the pilot signal are synthesized in 8 is frequency-modulated in 3 and is transmitted.

10. 发明专利

JPS5269301A MODE CONTROL DEVICE 失效
公开(公告)号：JPS5269301A
公开(公告)日：1977-06-09
申请号：JP14543575
申请日：1975-12-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SAKAI SATORU , SASABE KAORU
IPC分类号： H04S1/00 , H04B1/16
摘要： PURPOSE:To perform adequate automatic changing over by emitting the signal of the other one side from two amplifiers to switch to a substantially monaural mode when there is no signal in the channel of one side for more than a given time, in a stereo receiver.

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