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51. 发明专利

JP2004157547A Optical device for projection, transmission type screen and projection type picture display device using them 有权
公开(公告)号：JP2004157547A
公开(公告)日：2004-06-03
申请号：JP2003408407
申请日：2003-12-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , OGURA NAOYUKI , TANITSU MASAHIKO , IKEDA HIDEHIRO
IPC分类号： G02B13/16 , G02B13/18 , G02F1/13 , G02F1/13357 , G03B21/00 , G03B21/14 , G03B21/62 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To obtain a liquid crystal back projection type picture display device of a single plate system in which brightness and color purity are made compatible, which is made compact and high-focus, whose picture plane distortion is restrained to be little and whose contrast performance is drastically improved.
SOLUTION: A lens device for projection having brightness equivalent to F 1.5 and constituted of three groups adopts constitution where video generating sources are directly coupled through cooling liquid, and is provided with 1st to 3rd dichroic mirrors DM1, DM2 and DM3 color-separating white illuminating light in such order as red, blue and green.
COPYRIGHT: (C)2004,JPO

52. 发明专利

JP2004094222A Optical apparatus 审中-公开
公开(公告)号：JP2004094222A
公开(公告)日：2004-03-25
申请号：JP2003206636
申请日：2003-08-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUSE KENJI , SHIRAISHI MIKIO , OTSUKA YASUO , KAKU NOBUYUKI , IKEDA HIDEHIRO
IPC分类号： G02F1/13 , G03B21/00 , G03B21/16 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To obtain an optical apparatus having a cooling device which is advantageous in size and thickness reduction.
SOLUTION: An air blow passage comprises a plurality of flow passages which are divided by guide members installed from nearby an air blowing means to nearby a light valve means. An air intake and an air outlet are arranged on the flank of the housing of the optical apparatus.
COPYRIGHT: (C)2004,JPO

53. 发明专利

JP2002055308A REFLECTION TYPE PROJECTOR DEVICE 失效
公开(公告)号：JP2002055308A
公开(公告)日：2002-02-20
申请号：JP2000245510
申请日：2000-08-08
申请人： HITACHI LTD
发明人： TANITSU MASAHIKO , HIRATA KOJI , IKEDA HIDEHIRO
IPC分类号： G02B26/08 , G02B27/18 , G03B21/00 , G03B21/10 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To provide a reflection type projector device which is compact, is few in ghost image and is excellent in contrast performance. SOLUTION: This reflection type projector device is provided with a reflection type panel 2 which reflects and modulates incident light and a projection lens 1 which enlarges the reflected light from the reflection type panel 2 and projects the same on a screen. Therein, the center position (optical axis) 1A of the projection lens and the center position 2A of the reflection type panel are relatively shifted and disposed. Further, when the part through which a vertical line of a total reflection prism (TRI prism) which is disposed between the reflection type lens 2 and the projection lens 1, on the center position 2A of the reflection type panel is made to be the central part of the said total reflection prism, the center position (optical axis) 1A of the projection lens is shifted to the light incident side of the total reflection prism more than the central part of the total reflection prism.

54. 发明专利

JPH10228691A OPERATION TRANSMISSION MECHANISM ANT ITS PROCESSING METHOD 失效
公开(公告)号：JPH10228691A
公开(公告)日：1998-08-25
申请号：JP2872997
申请日：1997-02-13
申请人： HITACHI LTD
发明人： IKEDA HIDEHIRO , YAMASHITA YOSHIHARU , OYAMA KAZUTO , UEDA MASASHI
IPC分类号： G11B15/26
摘要： PROBLEM TO BE SOLVED: To reduce vibration and noise of an rotary shaft and to prevent the positioning accuracy of the rotary shaft from being degraded by pressing down the shaft end of the opposite side of the shaft end erected in the base of the rotary shaft of a mechanism transmitting an operation by a gear revolving around the rotary shaft erected in the base with a leaf spring or an elastic body. SOLUTION: The upper end of the rotary shaft 1 of a gear 2 to be rotatingly driven by a belt 4 is pressed down with a leaf spring 3. The shaft end of the leaf spring 3 side of the rotary shaft 1 is made to be a tapered shape and a tapered hole is provided at a position of the leaf spring 3 where is to be brought into contact with the rotary shaft 1 and the opening diameter of the tapered hole of the spring 3 is set to the the middle of the maximum diameter and the minimum diameter of the tapered shape of the shaft end. Thus, the rotary shaft 1 is held without backlash and vibration and noise of the shaft 1 due to the fluctuation of tensile strength of the belt 4 are prevented from occurring and also the positioning accuracy of the shaft 1 is enhanced by pressing down the shaft 1 of the gear 2 with the leaf spring 3.

55. 发明专利

JPH09312048A CASSETTE AUTOMATIC CHANGER 失效
公开(公告)号：JPH09312048A
公开(公告)日：1997-12-02
申请号：JP12683296
申请日：1996-05-22
申请人： HITACHI LTD
发明人： OKAMOTO TOMOMI , KAKU NOBUYUKI , IKEDA HIDEHIRO
IPC分类号： G11B15/68
摘要： PROBLEM TO BE SOLVED: To obtain a miniature cassette automatic changer capable of automatically exchanging a small number of housed cassettes in a data streamer coped with the cassette tape of a tape recording medium. SOLUTION: For a recording/reproducing drive, the direction of height and the longest side are made in parallel in arranging it at the tape pulling out position, and a transporting path used when the cassette selected from a cassette stocker is transported to the recording/reproducing drive, almost vertically intersects the path transporting to the cassette stocker from the transporting path and a cassette port 7. In a recording/reproducing operation, the fixed position of the cassette 2 selected from the cassette stocker is settled on the transporting path of recording/reproducing drive, and after the cassette is transported to the cassette fixing position, the cassette 2 is fixed on the recording/reproducing drive. The cassette port 7 and the parts up to the cassette stocker are arranged on a straight line, and the selecting position of an optional one cassette 2 and the fixing position of the cassette 2 in a recording/ reproducing operation by the recording/reproducing drive are arranged on the straight line, then two transporting means are linearly operated.

56. 发明专利

JPH09229839A MINUTE DEFORMATION MEASUREMENT METHOD FOR THIN FILM BODY AND MEASUREMENT INSTRUMENT USING IT 失效
公开(公告)号：JPH09229839A
公开(公告)日：1997-09-05
申请号：JP4182596
申请日：1996-02-28
申请人： HITACHI LTD
发明人： IKEDA HIDEHIRO , OKAMOTO TOMOMI , KAKU NOBUYUKI , ONO HIROAKI
IPC分类号： G01B11/16 , G01N3/40
摘要： PROBLEM TO BE SOLVED: To evaluate the rigidity of magnetic tape, etc., by measuring, with a sample device and with precision, minute deformation near the surface of a multi-layer thin film body of magnetic tape, etc. SOLUTION: By pressing a curved magnetic tape deformation occurrence member to a thin film body 3 applied with tension, the minute deformation of the thin film body 3 at this time is measured. In order to measure the deformation of the thin film body 3, a curved lens 4 is used for a member, and interference fringes formed by interference of light is observed from above the lens to evaluate rigidity. Since the rigidity of the surface of thin film body 3 is measured like this, for example, under the deformation condition similar to the one when a magnetic head comes into contact with the magnetic tape 3 having multi-layer structure, measurement is performed simply and precisely.

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