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101. 发明专利

JPH1169845A POWER SUPPLY 失效
公开(公告)号：JPH1169845A
公开(公告)日：1999-03-09
申请号：JP22994097
申请日：1997-08-26
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU , NIIHORI HIROSHI , KAMOI TAKESHI
IPC分类号： H05B41/282 , H02M1/08 , H02M7/5387 , H05B41/29
摘要： PROBLEM TO BE SOLVED: To provide a power supply which can surely drive a switching element, even if a pulse transformer is used in a control circuit and moreover assures less switching loss and improvement in efficiency. SOLUTION: A current-detecting circuit 2 detects a current flowing into an inductor L2 and turns on FETQ4 or FETQ3 by applying a drive signal to the gate terminals of the FETQ4 or FETQ3 from a control circuit 1, when a current flows into the inductor L2 . Since FETQ1 to Q4 operate at all times, not depending on the polarity of an AC power supply Vs, the FET of different voltage is driven, even if the reference voltage of the control circuit 1 is determined to be at any level. Therefore, all FETs surely be driven, using a pulse transformer PT.

102. 发明专利

JPH1116689A POWER SUPPLY UNIT 失效
公开(公告)号：JPH1116689A
公开(公告)日：1999-01-22
申请号：JP16918897
申请日：1997-06-25
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWABORI YUTAKA , NIIHORI HIROSHI , SHIOMI TSUTOMU , NAKAMURA TOSHIAKI , HIZUMA SHINJI
IPC分类号： H05B41/24 , H02M7/48 , H02M7/5387 , H05B41/16
摘要： PROBLEM TO BE SOLVED: To provide a stable operation even under a condition in which an impedance is kept extremely high until discharge is started when a load is a high voltage discharge lamp, in a power supply unit in which a switching element is used for both a step-up voltage chopper circuit and a step-down voltage chopper circuit and a low frequency rectangular wave output is obtained by using a commercial alternating current power source. SOLUTION: In this device, after a period of time to store energy in an input power source AC in a first inductor L1 by short-circuiting both ends of a series circuit of the input power source AC and the first inductor L1 while no load is applied, the energy stored in the first inductor L1 is discharged to a smoothing capacitor C through the input power source AC. Or, after a period of time to store energy in a load in a second inductor L2 by short-circuiting both ends of a series circuit of the load and the second inductor L2, the energy stored in the second inductor L2 is discharged to the smoothing capacitor C through the load.

103. 发明专利

JPH10337010A POWER SUPPLY 失效
公开(公告)号：JPH10337010A
公开(公告)日：1998-12-18
申请号：JP13698297
申请日：1997-05-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU , NIIHORI HIROSHI , IWABORI YUTAKA , NAKAMURA TOSHIAKI , OKAWA MASANAO
IPC分类号： H05B41/282 , H02M3/155 , H05B41/29
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive and reliable power supply in which the size can be reduced by decreasing the number of switching elements while reducing the loss thereof. SOLUTION: The power supply comprises a DC power supply E connected with a series circuit of an inductance element L1 , a rectifying element D1 and an electrolytic capacitor C1 , and a switching element Q1 connected in parallel with the series circuit of the DC power supply E and the inductance element L1 , wherein a load Z is connected with the diode D1 through an inductance element L2 . The inductance element L1 , the rectifying element D1 and the switching element Q1 constitute a converter circuit 1 comprising a step-up chopper whereas the switching element Q1 , the rectifying element D1 and the inductance element L2 constitute a converter circuit 2 comprising a step-dawn chopper.

104. 发明专利

JPH10270182A HIGH-PRESSURE DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH10270182A
公开(公告)日：1998-10-09
申请号：JP7300897
申请日：1997-03-26
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： KAMOI TAKESHI , SHIOMI TSUTOMU , ERIGUCHI HIROYASU
IPC分类号： H05B41/18
摘要： PROBLEM TO BE SOLVED: To provide a small-size and low-priced high-pressure discharge lamp lighting device capable of being restarted at a practically trouble-free level for requirements of instantaneous restart. SOLUTION: A lighting device 1 receives power supply from an AC power source AC to supply proper power to a high-pressure discharge lamp La and to effect stable lighting. A pulse generation means 2 generates a high voltage pulse Vp3 so that the high-pressure discharge lamp La is started by causing an electric breakdown. A peak value of the high voltage pulse Vp3 output from the pulse generation means 2 at the time of start is not more than a maximum value VpMAX of an electric breakdown voltage in the relationship between extinction time τand the electric breakdown voltage, and is not less than a second peak value VpMAX lower than the maximum value VpMAX, and is set to the electric breakdown voltage VpMIN or more when the high-pressure discharge lamp La is started after sufficiently long extinction time τ elapses. As a result, the peak value of the high voltage pulse Vp3 can be lowered to enable restart of a small-size and low-priced lighting device 1 at a practically trouble-free level for requirements of instantaneous restart.

105. 发明专利

JPH1022084A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH1022084A
公开(公告)日：1998-01-23
申请号：JP17025396
申请日：1996-06-28
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU
IPC分类号： H05B41/24 , H05B41/16
摘要： PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device which is designed into a small, inexpensive one while the higher harmonic components of input currents are low and the power factor is high. SOLUTION: A DC output obtained by rectifying and smoothing an ac power supply AC is stepped down by a step-down chopper circuit comprising a bridge circuit 2 for switching elements Q1 to Q4 , a first inductor L1 , and a load circuit 3, and is supplied to the discharge lamp La of the load circuit 3 to turn on the discharge lamp La using rectangular waves. Circuit nodes of the step-down chopper circuit where potential sways like high frequencies, i.e., the output end of the bridge circuit 2 and the ac power supply AC, are connected together via a second inductor L2 through connecting paths 51 , 52 which involve capacitors C51 , C52 . Input currents can be sampled via the connecting paths 51 , 52 over almost all the blocks of the source voltage of the ac power supply AC, so that a reduction in higher harmonic components and improvement in power factor can be achieved, and so that a smoothing capacitor C0 can be given stepping-up action by the second inductor L2 .

106. 发明专利

JPH0917590A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH0917590A
公开(公告)日：1997-01-17
申请号：JP16127595
申请日：1995-06-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU , NIIHORI HIROSHI , OKAWA MASANAO
IPC分类号： H05B41/282 , H05B41/29
摘要： PURPOSE: To quickly stabilize the beam of light and perform protection relating to a discharge lamp in the end of its life, by lighting the lamp with tube power in accordance with lighting time in the initial period of starting, and lighting the lamp with power in accordance with tube voltage after lighting is stabilized. CONSTITUTION: In the first tube power target value generating circuit 11, voltage V13 is output to determine a tube power target value in accordance with a lighting time. In the second tube power target value generating circuit 12, a tube power target value is determined in accordance with tube voltage, to obtain output voltage V23 from a voltage detection value Vd . A lighting mode switching circuit 13, when a power supply is closed, holds a switch S in a contact (a) for a prescribed time, thereafter to changeover the switch S in a contact (b), and to selectively output an output V13 of the circuit 11 or an output V23 of the circuit 12 relating to a control signal generating circuit 14. In the circuit 14, the output V13 or V23 selectively obtained from the circuit 13 is input as target tube power Vm , on the other hand to output a control signal Vc so as to decrease a difference between Vm in proportion to target tube power and voltage Vm in proportion to actual tube power W from the voltage detection value Vd and from a current detection value Id.

107. 发明专利

JPH097784A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH097784A
公开(公告)日：1997-01-10
申请号：JP14926195
申请日：1995-06-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： NIIHORI HIROSHI , SHIOMI TSUTOMU , OKAWA MASANAO
IPC分类号： H05B41/24 , H05B41/282 , H05B41/29
摘要： PURPOSE: To maintain the discharge of a discharge lamp successively and to carry out a stable lighting, by bringing the discharge lamp close to the state before the polarity is reversed instantly, when the polarity of a rectangular wave is reversed, in a discharge lamp lighting device of a rectangular wave lighting method to control the lamp power according to the outputs of a lamp current detecting circuit and a lamp voltage detecting circuit. CONSTITUTION: In this device, there are provided with a lamp current maintaining circuit 51 furnishing a lamp current maintaining period to maintain the detecting output of a lamp current detecting circuit 5 at almost the immediately before the reversing when the polarity of a lamp current is reversed; and a lamp voltage maintaining circuit 61 furnishing a lamp voltage maintaining period to maintain the detecting output of a lamp voltage detecting circuit 6 at almost the immediately before the reversing when the polarity of the lamp voltage is reversed. The lamp voltage maintaining period is set at least longer than the lamp current maintaining period, and the lamp power is regulated by the maintaining outputs of both circuits.

108. 发明专利

JP2550325B2 失效
公开(公告)号：JP2550325B2
公开(公告)日：1996-11-06
申请号：JP16498986
申请日：1986-07-14
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU
IPC分类号： H02M1/14 , H02M1/08

109. 发明专利

JPH0831583A INVERTER APPARATUS 失效
公开(公告)号：JPH0831583A
公开(公告)日：1996-02-02
申请号：JP16397194
申请日：1994-07-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： MATSUMOTO TATSUHIKO , KITADOU MASAHARU , ITO HISAHARU , SHIOMI TSUTOMU , MURAKAMI YOSHINOBU , NIIHORI HIROSHI
IPC分类号： H05B41/24 , H05B41/00
摘要： PURPOSE:To provide an inverter apparatus for which a stable dead time can be set. CONSTITUTION:In a standard trapezoidal wave generating circuit 5, a transistor Tr is turned on and off by standard pulses sent out of an oscillator 6 and during the time when the transistor Tr is turned off, a capacitor 4 is charged with electric current (i) from a rated current electric power source 3. Voltage between both ends of the capacitor 4 increases with a prescribed inclination to a constant voltage V1 since the transistor Tr is turned off and keeps the constant voltage condition after that, and when the transistor Tr is turned on after that, the electric charge of the capacitor 4 is discharged by the transistor Tr and the voltage of the capacitor 4 decreases with prescribed inclination. The voltage between both ends of the capacitor 4 becomes trapezoidal waveform and comparators CP1-CP2 receive the voltage with trapesoidal waveform, compare the level of the received signals with set standard values Va or Vd, and send driving signals SD1-SD4 for which dead time is set.

110. 发明专利

JPH0811624A FRONT LIGHT DEVICE FOR VEHICLE 失效
公开(公告)号：JPH0811624A
公开(公告)日：1996-01-16
申请号：JP14515294
申请日：1994-06-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOMI TSUTOMU , MURAKAMI YOSHINOBU , NIIHORI HIROSHI , KITADOU MASAHARU , ITO HISAHARU , MATSUMOTO TATSUHIKO
IPC分类号： G04F10/00 , B60Q1/04 , F21S8/10 , F21W101/10 , F21Y103/00 , H05B41/00 , H05B41/18
摘要： PURPOSE:To prevent the rise of a battery by reducing the electric charge consumption of the vehicle battery without needing a large capacity condenser and a secondary battery. CONSTITUTION:This device is equipped with a switch means S1 which stops the supply of control electric power to at least, out of blocks CTA, CTB constituting a control portion CNT, the block CTB excepting the block CTA that constitutes the signal detection portion of an ON/OFF signal input terminal and a light putting-out time measuring portion to measure the light putting-out time of an HID lamp to make the initial electric power of an HID lamp re-start time variable according to a light putting-out time, when the ON/OFF signal input terminal of the control portion CNT is OFF.

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