公开(公告)号：DE69629157D1

公开(公告)日：2003-08-28

申请号：DE69629157

申请日：1996-09-27

Applicant: SEIKO EPSON CORP

Inventor： KIGUCHI HIROSHI ,  NISHIKAWA TAKAO ,  SHIMODA TATSUYA ,  KOJIMA MASARU ,  KANBE SADAO

IPC: G02B5/20 ,  G02B5/22 ,  G02F1/1335

公开(公告)号：AU6581800A

公开(公告)日：2001-03-19

申请号：AU6581800

申请日：2000-08-14

Applicant: SEIKO EPSON CORP ,  CAMBRIDGE DISPLAY TECH LTD

Inventor： SHIMODA TATSUYA ,  KOYAMA TOMOKO ,  KANEKO TAKEO ,  BURROUGHES JEREMY HENRY

IPC: G02B5/20 ,  G02B5/26 ,  G02B5/28 ,  H01L51/50 ,  H01L51/52 ,  H05B33/02 ,  H05B33/12 ,  H05B33/24 ,  H05B33/26 ,  H01L51/20

Abstract: An efficient multiple-wavelength light emitting device is provided. This multiple-wavelength light emitting device comprises a light emitting layer 4 for emitting light containing wavelength components to be output, a negative electrode 5 that is positioned at the back surface of the light emitting layer and that transmits at least a portion of the light, reflecting layers 7R, 7G, and 7B, positioned at the back surface of the negative electrode, for reflecting, of the light emitted through the negative electrode to the back surface, light having specific wavelengths, which reflecting layers are stacked up in order perpendicularly to the light axis, in correspondence with the wavelengths of the light to be reflected, thus configuring a reflecting layer group 7. In the direction perpendicular to the light axis, divisions are made in any of at least two or more light emission regions which reflect light of different wavelengths. In each light emission region, the distance between the reflecting surface of the reflecting layer 7 on the semi-transparent side and the reflecting surface in the semi-reflecting layer 2 is adjusted in this configuration so that it becomes a resonating optical path length for the light that is emitted in the light emission region.

公开(公告)号：DE69231388D1

公开(公告)日：2000-09-28

申请号：DE69231388

申请日：1992-11-27

Applicant: SEIKO EPSON CORP ,  COSMO SYSTEM CORP

Inventor： ITO NORIO ,  SHIMODA TATSUYA ,  WAKO SUMITAKA ,  ISHIBASHI TOSHIYUKI ,  UEKI YASUNORI ,  OKEYA MAKOTO ,  MATSUZAWA MITSUHO

IPC: B61B12/02 ,  B61B12/06 ,  G01D5/20

Abstract: The invention relates to a displacement detector for a wire rope (2) made of a magnetic substance, said displacement detector being provided in a transport apparatus having a pulley (13) engaging with said wire rope (2) and a transport unit travelling together with said wire rope (2) or said pulley (13), and said detector being designed to detect a relative position between the wire rope (2) and the pulley (13), comprising: displacement detecting coils (19) disposed at an equal interval of one side face of the pulley (13) and electrically connected in series, a revolving side coil (28) disposed on the pulley (13) and connected to the end of the displacement detecting coils (19) connected in series, a stationary side coil (30) disposed opposite of the revolving side coil (28), and forming a transformer together with the revolving side coil (28) by being applied with a DC voltage, and a detecting means connected to both ends of the stationary side coil (30) for detecting an impedance change generated in the displacement detecting coils (19).

公开(公告)号：DE69033178T2

公开(公告)日：1999-10-21

申请号：DE69033178

申请日：1990-04-20

Applicant: SEIKO EPSON CORP

Inventor： IKUMA KEN ,  AKIOKA KOJI ,  SAKATA MASAAKI ,  SHIMODA TATSUYA

IPC: H01F41/02

公开(公告)号：DE68927203T2

公开(公告)日：1997-02-06

申请号：DE68927203

申请日：1989-05-18

Applicant: SEIKO EPSON CORP ,  KOBE STEEL LTD

Inventor： KOBAYASHI OSAMU ,  SHIMODA TATSUYA ,  AKIOKA KOJI ,  YAMAGAMI TOSHIAKI ,  KAWAI NOBUYASU

IPC: H01F1/057 ,  H01F41/02 ,  H01F1/04

Abstract: This invention relates to a permanent magnet having magnetic anisotropy given by means of a newly developed mechanical alignment and a manufacturing method thereof, and more particularly to a magnet comprising R(at least one rare-earth element selected from the group consisting of Pr, Nd, Dy, Ce, La, Y and Tb), M(at least one transition metal selected from the group consisting of Fe, Co, Cu, Ag, Au, Ni and Zr) and X(at least one IIIb element of the periodic table selected from the group consisting of B, Ga and Al) and manufacturing method thereof, said alloy of R-M-X series, which composes basic component, are melted and cast, then cast ingot is hot-worked at the temperature above 500 C to remove or eliminate liquid phase of non-magnetic R-rich phase to concentrate magnetic phase, and to give magnetic anisotropy by means of mechanical alignment. It can provide magnet with excellent property comparable to that of the magnet provided by the conventional manufacturing method while applying cast hot-working heat treatment process which does not includes powdering process.

公开(公告)号：DE3854691T2

公开(公告)日：1996-05-02

申请号：DE3854691

申请日：1988-12-23

Applicant: ZEXEL CORP ,  SEIKO EPSON CORP

Inventor： YAMAHA YOSHIKAZU ,  TAKAGI NOBUKAZU ,  SHIMODA TATSUYA ,  ENDO KENICHI ,  SETO TAKESHI

IPC: F04C29/00 ,  H02K1/02 ,  H02K1/27 ,  H02K15/03 ,  H02K29/08 ,  H02P6/24 ,  H02P6/00

Abstract: An air conditioner is disclosed, comprising a scroll type compressor (1) and a brushless DC motor (7) having a rotor (9) provided with a permanent magnet (11) and a stator (12) provided with a sensor (23) adapted to detect a relative position of said rotor (9) and said stator (12). Here is additionally disclosed an air conditioner in which the rotor (9) of the brushless DC motor (7) comprises a permanent magnet (11) basically made of rare earth elements inclusive of yttrium, transition metal and boron and a driving circuit (25) for the motor (7) includes a braking circuit (30) adapted to excite coils (14) of the motor (7) and thereby to block the rotor (9) against a reverse rotation.

公开(公告)号：DE3854691D1

公开(公告)日：1995-12-21

申请号：DE3854691

申请日：1988-12-23

Applicant: ZEXEL CORP ,  SEIKO EPSON CORP

Inventor： YAMAHA YOSHIKAZU ,  TAKAGI NOBUKAZU ,  SHIMODA TATSUYA ,  ENDO KENICHI ,  SETO TAKESHI

IPC: F04C29/00 ,  H02K1/02 ,  H02K1/27 ,  H02K15/03 ,  H02K29/08 ,  H02P6/24 ,  H02P6/00

Abstract: An air conditioner is disclosed, comprising a scroll type compressor (1) and a brushless DC motor (7) having a rotor (9) provided with a permanent magnet (11) and a stator (12) provided with a sensor (23) adapted to detect a relative position of said rotor (9) and said stator (12). Here is additionally disclosed an air conditioner in which the rotor (9) of the brushless DC motor (7) comprises a permanent magnet (11) basically made of rare earth elements inclusive of yttrium, transition metal and boron and a driving circuit (25) for the motor (7) includes a braking circuit (30) adapted to excite coils (14) of the motor (7) and thereby to block the rotor (9) against a reverse rotation.

公开(公告)号：DE3889996T2

公开(公告)日：1994-09-15

申请号：DE3889996

申请日：1988-03-01

Applicant: SEIKO EPSON CORP

Inventor： AKIOKA KOJI ,  KOBAYASHI OSAMU ,  SHIMODA TATSUYA

IPC: C21D6/00 ,  B22F9/02 ,  B22F9/16 ,  C21D8/12 ,  C22C1/04 ,  C22C38/00 ,  C22C38/10 ,  C22C38/16 ,  H01F1/053 ,  H01F1/057 ,  H01F1/04

Abstract: This improved rare earth element-ironbase permanent magnet is produced as follows, 1) a cast ingot is prepd. by melting and casting an alloy (A) comprising at least one rare-earth metal represented by R, and Fe, B and Cu. 2) fine and magnetically anisotropic crystal particles are obtained by hot working the cast ingot at 500 deg. C or higher. If this hot-working is preceded or followed by heat treatment at 250 deg. C or higher the persistance of the magnetic power will be increased. The alloy (A) comprises R (8-30%), B (2-28%), Cu (6% or less), and Fe and unavoidable impurities . The unavoidable impurities S (2 atomic % or less), C (4 atomic % or less) and P (4 atomic % or less) are contained in the alloy. The Fe component can be replaced by Co 50 atomic % or less. One or more than one element selected from among Ga, Al, Si, Bi, V, Nb, Ta, Cr, Mo, W, Ni, Mn, Ti, Zr and Hf can be added to the alloy in the range of 6 atomic % or less. R can be composed of one or more than one component selected from Pr, Nd, Pr-Nd alloy, Ce-Pr-Nd alloy, rare earth elements. A modified process for producing the magnet is that after hot working , the alloy is ground and crushed, and the obtained powder is kneaded with an organic binder and moulded to produce the magnet. .

公开(公告)号：FR2640828A1

公开(公告)日：1990-06-22

申请号：FR8900589

申请日：1989-01-19

Applicant: SEIKO EPSON CORP

Inventor： HORIKAWA MITSUHIRO ,  ITO HIROSHI ,  IDE TSUGIO ,  YANAGISAWA MICHIO ,  SHIMODA TATSUYA ,  AKIOKA KOJI

IPC: G11B7/09 ,  H01F1/057 ,  H01F41/02 ,  H02K1/27 ,  H02K15/03 ,  H02K41/02

Abstract: An actuator rotatable about a support shaft rectilinearly movable along axis of a shaft and rotatably movable about the shaft includes a cylindrical magnet extending about the shaft. The cylindrical magnet has a plurality of poles in the radial direction and magnetized boundaries between poles of opposite polarity extending in a circumferential direction of the magnet and extending in an axial direction of the magnet. A plurality of yokes are provided to define magnetic poles coupled in facing relationship with the magnetic boundaries of a cylindrical magnet and having coils coupled thereto to define the magnetic poles.

公开(公告)号：AT389527B

公开(公告)日：1989-12-27

申请号：AT156487

申请日：1987-06-19

Applicant: SEIKO EPSON CORP

Inventor： AKIOKA KOJI ,  KOBAYASHI OSAMU ,  SHIMODA TATSUYA

IPC: C21D8/12 ,  H01F1/04 ,  H01F1/057 ,  H01F1/08

Abstract: To produce permanent magnets which as their main constituents contain rare earths including yttrium, iron and boron, an alloy containing at least one rare earth including yttrium, boron and iron is melted, the molten alloy is cast to form at least one cast ingot. The cast ingot is subjected to a heat treatment at a temperature of at least 500 degrees Celsius with a strain of 10 to 10 per second, whereupon a heat treatment is carried out at a temperature between 800 and 1050 degrees Celsius. During the heat treatment of the alloy, a reduction in cross section with a reduction ratio of at least 60 per cent is carried out.