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41. 发明专利

JP2000268988A DISCHARGE LAMP DRIVING DEVICE 失效
公开(公告)号：JP2000268988A
公开(公告)日：2000-09-29
申请号：JP7432299
申请日：1999-03-18
申请人： NIPPON SOKEN , DENSO CORP
发明人： FUKAGAWA YASUHIRO , KATAOKA TAKUMI , FUJII AKIRA
IPC分类号： H05B41/24 , H05B41/282 , H05B41/288 , H05B41/38
摘要： PROBLEM TO BE SOLVED: To provide a discharge lamp driving device capable of providing stable illumination after lighting a discharge lamp. SOLUTION: In this discharge lamp driving device, a voltage of a desired driving frequency to be applied on a piezoelectric transformer 2 is switched by a switching means 4 according to the lighting condition of a discharge lamp 1. In this manner, the desired frequency to be applied on the piezoelectric transformer 2 is switched by the switching means 4. Therefore, the illumination of the discharge lamp 1 can be maintained stably even if the voltage is changed suddenly due to lighting the discharge lamp 1.

42. 发明专利

JPH11157920A CERAMIC HEATER AND ITS PRODUCTION 失效
公开(公告)号：JPH11157920A
公开(公告)日：1999-06-15
申请号：JP34221697
申请日：1997-11-26
申请人： DENSO CORP
发明人： KOBAYASHI MASAYUKI , FUJII AKIRA , TSURUTA TADASHI , SHIRAI MAKOTO
IPC分类号： H05B3/20 , C04B35/10 , H05B3/10 , H05B3/18
摘要： PROBLEM TO BE SOLVED: To provide a ceramic heater scarcely causing migration and a method for producing the ceramic heater. SOLUTION: This ceramic heater 1 comprises a base composed of a ceramic and a pyrogenic resistor 13. The ceramic comprises 90-96 wt.% Al2 O3 , 1-8 wt.% SiO2 , 0.6-1.5 wt.% MgO and 1.3-6.8 wt.% CaO and further, CaO/MgO is =1.9 wt.% when total amount of Al2 O3 , SiO2 , MgO and CaO is defined as 100 wt.% and the ceramic further contains 0.2-20.0 wt.% ZrO2 and 0.2-20.0 wt.% Y2 O3 when total amount of Al2 O3 , SiO2 , MgO and CaO is defined as 100 wt.%.

43. 发明专利

JP2003243742A CERAMIC LAMINATE AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2003243742A
公开(公告)日：2003-08-29
申请号：JP2002332217
申请日：2002-11-15
申请人： NIPPON SOKEN , DENSO CORP
发明人： SUMIYA ATSUHIRO , SHINDO HITOSHI , YASUDA ETSURO , NAGAYA TOSHIATSU , YAMAMOTO TAKASHI , FUJII AKIRA
IPC分类号： H01L41/22 , H01L41/083 , H01L41/187 , H01L41/273 , H01L41/297 , H01L41/43
摘要： PROBLEM TO BE SOLVED: To provide a ceramic laminate wherein components of a non- combusted laminate in calcination and components of an electrode layer are prevented from being brought into reaction, with the difficulty of both components in liquidification, and its manufacturing method. SOLUTION: A printed section 13 is formed as a printing sheet 10 with electrode paste on green sheets 11, 12 containing lead, and a predetermined number of the printing sheets are stacked into a non-combusted laminate 15. The non- combusted laminate is degreased in the atmosphere to degrease organic components. The printing section 13 is reduced in a reduced atmosphere containing hydrogen into the printing sheet 13 containing copper as a chief component. Further, the non-combusted laminate 15 is calcined in a reduced atmosphere. A dielectric layer containing lead and an electrode layer for applying voltage to the dielectric layer are alternately stacked. An oxidizing section containing copper is provided in the vicinity of the surface of the electrode layer with the thickness in the laminate direction of 0.5 to 2 μm and with the content of the copper therein of 0.1 to 30 wt.%. COPYRIGHT: (C)2003,JPO

44. 发明专利

JP2002255646A DIELECTRIC CERAMIC FIRED AT LOW TEMPERATURE, MULTILAYER TYPE DIELECTRIC ELEMENT, METHOD OF PRODUCING THE DIELECTRIC CERAMIC AND AUXILIARY OXIDE 审中-公开
公开(公告)号：JP2002255646A
公开(公告)日：2002-09-11
申请号：JP2001364641
申请日：2001-11-29
申请人： NIPPON SOKEN , DENSO CORP
发明人： SUMIYA ATSUHIRO , FUJII AKIRA , YASUDA ETSURO , SHINDO HITOSHI , YAMAMOTO TAKASHI , KATAOKA TAKUMI , NAGAYA TOSHIATSU
IPC分类号： C04B35/00 , C04B35/491 , C04B35/497 , H01B3/12 , H01L41/083 , H01L41/107 , H01L41/187 , H01L41/22 , H01L41/273 , H01L41/333 , H01L41/39 , C04B35/495 , H01L41/24
摘要： PROBLEM TO BE SOLVED: To fire a PZT-based dielectric ceramic at a desired low temperature and to prevent lowering of the performance of a base material. SOLUTION: The dielectric ceramic is obtained by providing a mixture or a calcined material of raw materials for the dielectric ceramic containing, as a main component, a composition having a dielectric ceramic composition of ABO3 -type, wherein, when B site is defined as 1, A site is Pb contained in a molar ratio of >=0.9, then adding, as auxiliary oxides, PbOx+(WO3 y+MoO3 z) (wherein, x+y+z=1; 0.005 =0) in an total amount of 0.05 to 20 mol.% to the mixture or the calcined material above, mixing, forming and firing the formed body. The total amount of tungsten and molybdenum in the fired body is lower than 0.098 moles when the molar amount of Pb is set to be 1, and the density of the fired body is >=7.5 g/cm . The auxiliary oxides are dispersed in the calcined powder, form a liquid phase at a desired temperature and accelerate firing, thereby it becomes possible to fire at a low temperature.

45. 发明专利

JPH10332630A MANUFACTURE OF CERAMIC HEATER 失效
公开(公告)号：JPH10332630A
公开(公告)日：1998-12-18
申请号：JP15806897
申请日：1997-05-29
申请人： DENSO CORP
发明人： FUJII AKIRA
IPC分类号： G01N27/41 , G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a ceramic heater with nearly no micro crack. SOLUTION: A lamination-type ceramic heater consisting of a heater substrate where a heat generation part and a lead part are provided and a covering plate being arranged so that the heater substrate is covered by the covering plate, the generation part, and the lead part is manufactured. A ceramic green sheet 21 for the substrate is prepared, a plurality of heater patterns 20 are printed and formed on the ceramic green sheet 21, and a ceramic green sheet 22 for covering is laminated, this constituting a lamination body 23. The lamination body 23 is cut for preparing an intermediate body 24 that has one heater pattern 20 inside and an exposed part for an external input being formed on a side surface 18 of the inside. After that, the intermediate body 24 is heated and baked.

46. 发明专利

JP2000183416A PIEZOELECTRIC CERAMIC TRANSFORMER 失效
公开(公告)号：JP2000183416A
公开(公告)日：2000-06-30
申请号：JP35910198
申请日：1998-12-17
申请人： NIPPON SOKEN , DENSO CORP
发明人： KATAOKA TAKUMI , SHINDO HITOSHI , YASUDA ETSURO , FUJII AKIRA
IPC分类号： H01L41/107
摘要： PROBLEM TO BE SOLVED: To provide a piezoelectric(PE) ceramic transformer capable of effectively preventing destruction caused by piezoelectric oscillation and outputting high voltage, despite its being compact. SOLUTION: This PE ceramic transformer 1 has a drive part 11, constituted of forming input electrodes 4 having mutually different poles on both the surfaces of one side of a flat and rectangular PE ceramic body 2 in the length direction and polarizing the PE ceramic body 2 in the thickness direction and a power generation part 12 constituted of forming an output electrode 6 on the end face of the other side of the ceramic body 2 and polarizing the ceramic body 2 in the length direction. In this case, a band-like auxiliary electrode 5 is formed on the width direction surface of the ceramic body 2 at the node position of PE oscillation, where stresses due to PE oscillation become maximum in the power generation part 12, in which strength is lacking because the polarizing direction is in parallel with the stress direction and silver for accelerating sintering of the ceramic body 2 is contained in the auxiliary electrode 5 to enhance the strength of a maximum stress position.

47. 发明专利

JP2002063993A DRIVING DEVICE FOR DISCHARGE LAMP 失效
公开(公告)号：JP2002063993A
公开(公告)日：2002-02-28
申请号：JP2001074389
申请日：2001-03-15
申请人： DENSO CORP
发明人： FUJII AKIRA , AKIMOTO KATSUHIDE
IPC分类号： H05B41/24 , H05B41/288 , H05B41/38 , H05B41/392
摘要： PROBLEM TO BE SOLVED: To shorten the time required until a metal halide lamp, which is a high-pressure discharge lamp, is transited to a stable lighting period. SOLUTION: A setting circuit 42a for setting a drive frequency that provides a supply current to a metal halide lamp 5 in a build-up period prior to a stable lighting period is provided for setting a drive frequency of a driving means 2 which is constructed in such a manner that the drive frequency can be varied and drives the metal halide lamp 5 through a piezoelectric transformer, and the supply current at this time is controlled to a value greater than a supply current in the stable lighting period, which is provided by a setting circuit 42c, thereby supplying sufficient electric energy to the metal halide lamp 5 in a short time in the build-up period in which impedance is lower compared with the stabilized lighting period to speed up transit to the stabilized lighting period.

48. 发明专利

JP2001196655A PIEZOELECTRIC TRANSFORMER CIRCUIT 失效
公开(公告)号：JP2001196655A
公开(公告)日：2001-07-19
申请号：JP2000226750
申请日：2000-07-27
申请人： NIPPON SOKEN , DENSO CORP
发明人： KATAOKA TAKUMI , FUJII AKIRA
IPC分类号： H01L41/107 , H02M3/24
摘要： PROBLEM TO BE SOLVED: To obtain a high output voltage without making a piezoelectric trans former large and easily apply to a small impedance load to it. SOLUTION: A piezoelectric ceramic transformer 1 is formed in such a structure that a power supply 5 is driven at a half wavelength mode. Input electrodes 31, 32 of the transformer 1 are formed at both ends of the transformer 1 in the longitudinal direction, and output electrode 4 is formed at the center of the transformer 1 in the longitudinal direction to interpose a generation unit 13 between drive sections 11 and 12. Therefore, the generating unit 13 is disposed at the node of the oscillation, that is, at the place where utmost distortion is observed in a piezoelectric ceramic material 2, to obtain the output voltage most efficiently. At the same time, the drive sections 11, 12 and the generating unit 13 are disposed at the region from the loop to the loop of the half wavelength in the oscillation, thereby making the positional ratio between the drive sections 11, 12 and the generating unit 13 flexibly adjustable.

49. 发明专利

JP2000332316A PIEZOELECTRIC CERAMIC TRANSFORMER 失效
公开(公告)号：JP2000332316A
公开(公告)日：2000-11-30
申请号：JP2000062113
申请日：2000-03-07
申请人： NIPPON SOKEN , DENSO CORP
发明人： KATAOKA TAKUMI , YASUDA ETSURO , SHINDO HITOSHI , FUJII AKIRA
IPC分类号： H01L41/053 , H01L41/083 , H01L41/107 , H02M3/24 , H02N2/04 , H05B41/282 , H05B41/288
摘要： PROBLEM TO BE SOLVED: To obtain a piezoelectric ceramic transformer which can produce a high output voltage which avoiding increase in size. SOLUTION: The piezoelectric transformer has an input part 2 for exciting resonance vibration in its axial direction and an output part 3 for outputting at lease one of a predetermined voltage and power. In this case, the transformer has a bolt 10 and a nut 11 for applying a compressive stress to the transformer 1 in its axial direction. Application of the axial compressive stress in this way enables a vibration zone of the transformer to be shifted to a compressive stress side, thus leading to the fact that the possible vibration width of the transformer per se. can be made large.

50. 发明专利

JP2000269566A PIEZOELECTRIC CERAMIC TRANSFORMER AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2000269566A
公开(公告)日：2000-09-29
申请号：JP7368499
申请日：1999-03-18
申请人： DENSO CORP , NIPPON SOKEN
发明人： FUJII AKIRA , KATAOKA TAKUMI
IPC分类号： H01L41/107 , C04B35/49 , C04B35/491 , H01L41/22 , H01L41/314 , H01L41/43
摘要： PROBLEM TO BE SOLVED: To realize high input power and high output power and to provide a structure suitable for high volume production, without increasing the size of a piezoelectric ceramic transformer device. SOLUTION: In piezoelectric ceramic bodies 2A and 2B, an output part 12 in which an output electrode 32 is formed is made of a piezoelectric material exhibiting smaller relative permittivity than that of an input part 11, in which input electrodes 31A and 31B are formed for reducing the input impedance and increasing voltage multiplication ratio. A mixed part 23, in which piezoelectric material of the input part 11 side and piezoelectric material of the output part 12 side are mixed, is provided on the boundary between the input part 11 and the output part 12 for preventing cracks of the piezoelectric ceramic bodies 2A and 2B by relaxing the shear stress on the boundary.

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