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91. 发明专利

JPH10116590A LIGHTING DEVICE OF DISCHARGE LAMP 失效
公开(公告)号：JPH10116590A
公开(公告)日：1998-05-06
申请号：JP22173597
申请日：1997-08-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOMINAMI SATOSHI , MIYAZAKI MITSUHARU , HORII SHIGERU
IPC分类号： H05B41/24 , H01J61/073 , H01J61/52 , H01J61/54 , H05B31/30
摘要： PROBLEM TO BE SOLVED: To provide a small lighting device which is capable of making starting voltage of a discharge lamp a low level and surely and stably lighting a lamp with low voltage by properly and selectively controlling sticking of an enclosed object of the discharge lamp to an electrode. SOLUTION: Based on knowledge that higher at a starting time is required and emission of secondary electron becomes more difficult when depositions exist in the electrode of a discharge lamp as compared with when depositions do not exist, a heat insulating film 103 is provided on one electrode 101 of the lamp. When the lamp is turned off, cooling for the electrode 101 is delayed by the other electrode 102 and almost all evaporated enclosed objects are one-sidedly sticked to the electrode 102. By generating electric field by impressing starting pulse toward the electrode 101 where depositions do not exist from the electrode 102 in this state that a deposition D biasedly exists, a γ action is generated in the electrode 101 where depositions do not exist, emission efficiency of secondary electron is improved, a starting voltage level is suppressed to the low level and a starting pulse generation circuit can be miniaturized according to this suppression.

92. 发明专利

JPH08148285A DISCHARGE LAMP LIGHTING APPARATUS 失效
公开(公告)号：JPH08148285A
公开(公告)日：1996-06-07
申请号：JP29104594
申请日：1994-11-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOMINAMI SATOSHI , MIYAZAKI MITSUHARU , HORIUCHI MAKOTO , HORII SHIGERU
IPC分类号： F21S8/10 , F21V14/00 , H05B41/00 , H05B41/24 , H05B41/282 , F21M3/18 , H05B41/29
摘要： PURPOSE: To provide two or more light distribution patterns only by a single lamp by making at least one of output frequency and output waveforms of current, voltage, and electric power variable in a lighting circuit and making the discharge arc shape variable. CONSTITUTION: Input a.c. is transformed into d.c. by a rectifying and filtering circuit 14 and transformed into a.c. again by an inverter circuit 19. The output frequency of the circuit 19 is changed to be frequency at the time when transistors 16, 17 are reciprocally turned ON and OFF by a driving circuit 20. When a discharge lamp 11 is started by high voltage pulses, the output from the circuit 19 is applied to a series circuit of the lamp and the lighting is retained and at that time the shape of the discharge arc becomes different due to the alteration of the frequency and light distribution pattern alters based on the position relation with a light controlling means. Also, in the case lighting is retained by the supplied electric power from a power amplifying circuit after starting of the lamp 11, the arc shape is changed by making the output current waveforms be triangular waveforms or rectangular waveforms. Moreover, the current waveforms may be changed by voltage alteration.

93. 发明专利

JPH07296980A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH07296980A
公开(公告)日：1995-11-10
申请号：JP9130694
申请日：1994-04-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYAZAKI MITSUHARU , KOMINAMI SATOSHI , OCHI MASAAKI , HORII SHIGERU
IPC分类号： H05B41/282 , H05B41/14 , H05B41/18 , H05B41/24 , H05B41/29
摘要： PURPOSE:To light a discharge lamp certinaly while the construction remains small by inserting the primary winding between the terminal of a switching element and the terminal of a charging means, and impressing a high voltage pulses generated by the secondary winding on the discharge lamp. CONSTITUTION:The primary winding 8a of a high voltage transformer 8 is inserted between the terminal of a discharge gap 7 as a switching element and the terminal of a charging means 10. The transformer 8 is connected so that the high voltage pulses generated by its secondary winding 8b are impressed on a discharge lamp 3. When the discharge 7 is in the on condition, the voltage impressed on the primary winding 8a is gas a voltage boosted as high as determined by the primary and secondary windings 8a, 8b, and is impressed on the lamp 3. The pulses have a small and narrow waveform and are impressed on the lamp 3 to cause its breakdown, and a transition is made from the glow discharge to the arc discharge condition. The voltage value having the energy required at this time is not so large, but pulses having a large width can be supplied to the lamp 3.

94. 发明专利

JPH07296605A HEADLAMP FOR VEHICLE 失效
公开(公告)号：JPH07296605A
公开(公告)日：1995-11-10
申请号：JP9130794
申请日：1994-04-28
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOMINAMI SATOSHI , HORII SHIGERU , MIYAZAKI MITSUHARU , OCHI MASAAKI
IPC分类号： G02F1/13 , F21S8/10 , F21S8/12 , F21V13/00 , F21V14/00 , F21M3/18 , F21M3/05
摘要： PURPOSE:To provide a headlamp for a vehicle capable of performing low/high beam switching even with a two-lamp type, in the vehicle use headlamp of projector system. CONSTITUTION:A device comprises a reflector 1 of almost elliptic shape, light source 2 arranging an emitting part so as to come to the first focal point of the reflector 1, projection lens arranged before the light source 2 to project light to the front and a liquid crystal device 4 arranged between the light source 2 and the projection lens 3. Light toward the projection lens 3 is distribution controlled by the liquid crystal device 4, and by changing its condition, a light distribution pattern is changed.

95. 发明专利

JPH06310288A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH06310288A
公开(公告)日：1994-11-04
申请号：JP9634793
申请日：1993-04-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYAZAKI MITSUHARU , HORII SHIGERU
IPC分类号： H02M7/48 , H05B41/24 , H05B41/282 , H05B41/29
摘要： PURPOSE:To start and light a discharge lamp stably by enabling enough reignition voltage to reignite a discharge lamp to be applied without lowering the smoothing function of a lamp current. CONSTITUTION:A discharge lamp is reignited surely with the voltage generated in a capacitor 14 by regenerating the energy accumulated in the secondary winding 19a of a pulse transformer 18 into a small capacity of capacitor 14 at the time of inversion of polarity after lighting of a discharge lamp 20. At this time, a diode 31 gets in on condition when the voltage generated in the capacitor 14 becomes the same as the output voltage of a first DC power source 1, so the voltage generated in the capacitor 14 never gets over the voltage generated in a first DC power source 1. Moreover, capacitors 11 and 14 smooth lamp currents enough excluding the time of reignition of the discharge lamp. By the above constitution, the capacitors 11 and 14 smooth lamp currents sufficiently, and sufficient reignition voltage can be generated in the capacitor 14 only at the time of reignition of the discharge lamp 20.

96. 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.

97. 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.

98. 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.

99. 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.

100. 发明专利

JPH0244698A DISCHARGE LAMP LIGHTING DEVICE 失效
公开(公告)号：JPH0244698A
公开(公告)日：1990-02-14
申请号：JP19252888
申请日：1988-08-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ITO KAZUHIKO , MIYAZAKI MITSUHARU , YOSHIBAYASHI MASAKATSU , HORII SHIGERU , OZAWA MASATAKA
IPC分类号： H05B41/392 , H05B41/24
摘要： PURPOSE:To surely perform starting, lighting and dimming as well as a stop of oscillation in an emergency by providing a circuit for dimming and an emergency detection circuit. CONSTITUTION:At the time of starting a dimming mode of a fluorescent lamp 7, a reset circuit (a) 33 is in operation by a timer circuit (a) 32 so that an emergency detection circuit 34 is made null and the fluorescent lamp 7 gets a state of all output lighting. After the lapse of a fixed time, the circuit (a) 32 stops the operation of the circuit (a) 33, the dimming circuit 31 operates and the lamp 7 is dimmed. At the time of emergency of the lamp 7, when the circuit (a) 33 is stopped after a fixed time by the circuit (a) 32, a signal of the emergency detection circuit 34 is outputted to a stop circuit 35. Then, the oscillation operation of a switching circuit 11 is stopped from a circuit 35 through a driving circuit 30. Further, since the circuit 34 consists of an electron circuit, whose detection level gets variable by changing resistance value of the resistors 53 and 53, repeated ON-OFF and a sure stop of oscillation can be performed regardless of lamp voltage and a surrounding temperature. Furthermore, in a normal lamp a reset circuit makes it possible to surely light while being translated to dimming.

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