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11. 发明专利

JP2584904B2 失效
公开(公告)号：JP2584904B2
公开(公告)日：1997-02-26
申请号：JP6581591
申请日：1991-03-29
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORII SHIGERU , MYAZAKI MITSUHARU , OZAWA MASATAKA , WAKE ATSUO , KAMYA TAKAYUKI
IPC分类号： H05B41/36

12. 发明专利

JPH08195287A FLUORESCENT LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH08195287A
公开(公告)日：1996-07-30
申请号：JP569495
申请日：1995-01-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： WAKE ATSUO , ITO KAZUHIKO
IPC分类号： H05B41/24 , H05B41/00
摘要： PURPOSE: To flow a resonance current without passing through electrodes when a fluorescent lamp is started, and enhance startability by connecting a capacitor in parallel between AC electric power supply side terminals of the fluorescent lamp. CONSTITUTION: A current transformer 13 of an inverter circuit 4 turns on and off transistors 9 and 11 in a switching system in an almost constant electric current value, and impresses large voltage on a fluorescent lamp 5 by resonance between an inductance element 8 and capacitors 7 and 6. Therefore, the lamp 5 is started and lighted without raising an electrode temperature. At this time, since the capacitor 6 is connected to the electric power supply side of the lamp 5, a resonance current generated before the fluorescent lamp is lighted, flows without passing through filament electrodes 5a and 5b of the lamp 5. Therefore, the first transistor 9 can be easily turned on, and circuit starting performance at low temperature time is improved.

13. 发明专利

JPH07211473A LIGHTING DEVICE FOR ELECTRIC DISCHARGE LAMP 失效
公开(公告)号：JPH07211473A
公开(公告)日：1995-08-11
申请号：JP235394
申请日：1994-01-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IMAI TAKAYUKI , SAITO TAKESHI , WAKE ATSUO
IPC分类号： H05B41/282 , H05B41/29
摘要： PURPOSE:To miniaturize a power circuit by reducing the consumed power when an electric discharge lamp is started up. CONSTITUTION:The secondary windings 23, 24 of a pulse transformer 25 are connected between an electric discharge lamp 22 and a power circuit and a switching element 28 is connected between the primary winding 26 of the pulse transformer 25 and a DC power circuit 10. The switching element 28 is turned on and off by a drive circuit 29 and a high-voltage starting pulse is applied to the electric discharge lamp 22. When the electric discharge lamp 22 enters a glow discharging state, a control means 32 reduces the peak value of a current flowing through the switching element 28; the amplitude of the high-voltage pulse is lowered, but the electric discharge lamp 22 in the glow discharging state enters into an arc discharging state and is lighted.

14. 发明专利

JPH0554990A ELECTRIC DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH0554990A
公开(公告)日：1993-03-05
申请号：JP21249891
申请日：1991-08-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAMIYA TAKAYUKI , OZAWA MASATAKA , WAKE ATSUO , MIYAZAKI MITSUHARU , KOYAMA KAZUTAKA , HORII SHIGERU
IPC分类号： H05B41/24 , H05B41/282
摘要： PURPOSE:To light up a discharge lamp stably with rectangular current of low frequency despite the small size of a choke coil set in series to the discharge lamp by utilizing the current limiting function of a DC power supply. CONSTITUTION:A discharge lamp 16 is lighted up steadily with low frequency rectangular waves while a DC power supply circuit 18 is furnished with current limiting function. The output voltage of this DC power supply circuit 18 is raised over the re-arcing voltage of the discharge lamp 16 through utilization of the energy accumulated in choke coils 6, 15 in the period when all switching elements are turned off in a full-bridge inverter circuit 19, which is connected with the output terminal of the DC power supply circuit 18, and thereby stable lighting is attained. At the time of starting, the output current limit value for the DC power supply circuit 18 is raised, and the lighting frequency is heightened compared with at time of steady operation, and thereby a large current is allowed to flow in the discharge lamp 16 while current is restricted by the choke coil 15, so as to quicken the optical rise.

15. 发明专利

JPH0513185A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH0513185A
公开(公告)日：1993-01-22
申请号：JP22386391
申请日：1991-09-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： WAKE ATSUO , MIYAZAKI MITSUHARU , OZAWA MASATAKA , KAMIYA TAKAYUKI , HORII SHIGERU
IPC分类号： H02M7/48 , H02M7/538 , H05B41/18 , H05B41/24
摘要： PURPOSE:To secure starting and re-starting of a discharge lamp and miniaturize a pulse transformer constituting a starter in a discharge lamp lighting device where a resonance circuit is used. CONSTITUTION:A power source 11 having a high frequency inverter is applied to a resonance circuit comprising capacitors 12, 13 and a choke coil 14. A high voltage pulse from a high voltage pulse generating device 16 is superposed on a voltage generated in the capacitor 13, to be applied to a discharge lamp 15. A detector 17 detects a state of the discharge lamp 15, and controls frequency of the high frequency inverter in accordance with the output. Application of the high voltage pulse by the high voltage pulse generating device 16 is controlled according to a period determined with a voltage charged to a charging circuit 23 and a discharge voltage of a discharging gap 24. Consequently, it is possible to decrease pulse energy required for the high voltage pulse, reduce an output of the resonance circuit, and miniaturize a lighting device.

16. 发明专利

JPH04264395A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH04264395A
公开(公告)日：1992-09-21
申请号：JP2459991
申请日：1991-02-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： WAKE ATSUO , OZAWA MASATAKA , KAMIYA TAKAYUKI , KOYAMA KAZUTAKA
IPC分类号： H05B41/18
摘要： PURPOSE:To improve the starting characteristic of discharge lamp, and make a device compact by using a pair of charging circuits for generating pulse, and using divided cores for pulse transformer, and making the number of coil of secondary coils, which is wounded around of each core, different from each other. CONSTITUTION:A pulse transformer 17 consists of divided cores 22, 23 and a primary coil 24, which is wound around of the core 22, and a primary coil 25, which is connected to the coil 24 in series and wound around of the core 23, and secondary coils 18, 19, which are wound around of the cores 22, 23 and connected to a discharge lamp 13 in parallel with each other. When electric charge, which is charged in a capacitor 26, is discharged, pulse voltage is generated in both ends of the coils 24, 25, and is transmitted to the secondary coils 18, 19 in response to a ratio of the number of winding. The number of winding of the coil 18, which is wound around of the core 22, is larger than that of the coil 19, which is wound around of the core 23. Consequently, high pulse is generated from the coil 18, and low pulse is generated from the core 23, and they are applied to the discharge lamp 13 in parallel with each other to facilitate starting of the discharge lamp 13 and stabilize the lighting.

17. 发明专利

JPH0343992A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH0343992A
公开(公告)日：1991-02-25
申请号：JP17751189
申请日：1989-07-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： WAKE ATSUO , ITO KAZUHIKO , MIYAZAKI MITSUHARU , OZAWA MASATAKA , HORII SHIGERU
IPC分类号： H05B41/24
摘要： PURPOSE:To stably light a discharge lamp while preventing going out by providing a control device connected so as to perform the control having a large term and a small term of output impedance of a power supply device at least in the output voltage impression term of a starting device. CONSTITUTION:A switching circuit 31 connected in parallel to the inductance 24 is controlled by a variable control device 30 to put the switching circuit 31 is a conductive state by one part of a half-period in terms of time. Accordingly, output impedance of a power supply device 11 is made bigger than the full-conductive state of the switching circuit 31 by enlarging the relative impedance of the inductance 24. When the switching circuit 31 is opened to make a lamp current to flow through the inductance 24, 25, a discharge lamp 13 shall be lighted by a rated lamp current. Thereby, the lamp current is temporally suppressed in the output voltage impression term of the starting device to prevent an output drop of the power supply device while stably starting the discharge lamp for improving building-up a flux of light.

18. 发明专利

JPH02288097A POWER SOURCE DEVICE 失效
公开(公告)号：JPH02288097A
公开(公告)日：1990-11-28
申请号：JP10886089
申请日：1989-04-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYAZAKI MITSUHARU , ITO KAZUHIKO , WAKE ATSUO , HORII SHIGERU , OZAWA MASATAKA
IPC分类号： H05B41/392 , H02M7/48
摘要： PURPOSE:To increase or decrease load currents while keeping fundamental oscillation frequency constant by making variable at least one value of the inductance and capacitance of a power circuit which has a resonance circuit. CONSTITUTION:A DC power source 1 is used and a power circuit 2 is formed by an inverter circuit 3 and a load 12. The inductance component of the power circuit 2 is varied by operation of the circuit 40. The control circuit 23 of the circuit 40 outputs signals e.g. as described by F to operate a switch circuit 18 so that an effect equal to variation of the value of the inductance component of the resonance circuit is obtained. The control circuit 29 of the circuit 41 operates a switch circuit 24 by means of its output signal e.g. as described by I so that an effect equal to variation of the value of the capacitance component of the resonance circuit is obtained. Load currents are thereby increased or decreased while fundamental oscillation frequency is kept constant.

19. 发明专利

JPH01283793A DISCHARGE LAMP LIGHTUP DEVICE 失效
公开(公告)号：JPH01283793A
公开(公告)日：1989-11-15
申请号：JP11393788
申请日：1988-05-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OZAWA MASATAKA , WAKE ATSUO , OTAKE SHIRO
IPC分类号： H05B41/18
摘要： PURPOSE:To have sure restarting of a discharge lamp 9 by discharging electric charges on No.1 and No.2 capacitors, and actuating a pulse transformer. CONSTITUTION:High voltage pulses are generated in the secondary winding 3b of a pulse transformer 3 by discharging the electric charges on No.1 capacitor 6, and thereby a discharge lamp 4 is certainly broken down. Pulses with large energy are generated in the same secondary winding 3b by discharging the electric charges on No.2 capacitor 10, and thereby the discharge lamp 4 is surely arc discharged to make lighting-up. This enables restarting of discharge lamp 4 certainly in a comparatively simple configuration through combination of minor components.

20. 发明专利

JPH07114993A ELECTRIC DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH07114993A
公开(公告)日：1995-05-02
申请号：JP26213293
申请日：1993-10-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SAITO TAKESHI , WAKE ATSUO , IMAI TAKAYUKI
IPC分类号： H05B41/24 , H05B41/18 , H05B41/282 , H05B41/29
摘要： PURPOSE:To reduce the output voltage of a power source to a large degree by maintaining lighting by a DC power source of the voltage close to the lamp voltage, and to reduce the cost by making an inductor itself compact. CONSTITUTION:A capacitor 53 is connected to a DC power source through a diode 52, and is operated as a power source for starting circuit. A FET 55 is connected in series to the primary coil 51c of a pulse transformer 51, and is connected to the capacitor 53. A drain current flows from the capacitor 53 through the primary coil 51c of the transformer and the FET 55 by turning the FET 55 on. When the FET 55 is turned off after turning the FET on, a kick voltage is generated on both ends of the coil 51c due to the inductance effect of the coil 51. A pulse current is returned through the capacitor 56 by increasing the kick voltage by means of the transformer 51 and by adding the voltage to an electric discharge lamp 3. The lamp 3 is thus started by a high voltage pulse. The lamp 3 is lighted stably by means of the low frequency rectangular wave AC power of an inverter 2. In this structure, the size, the weight, and the cost of the device can be reduced.

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