专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

JPS5325386A SWITCH CIRCUIT OF PHO TOOSEMICONDUCTOR 失效
公开(公告)号：JPS5325386A
公开(公告)日：1978-03-09
申请号：JP9965776
申请日：1976-08-23
申请人： HITACHI LTD
发明人： SAGAWA AKIO , SUZUKI MASAYOSHI
IPC分类号： H01L31/10 , H01L31/18
摘要： PURPOSE:To obtain a switch circuit having two-way switching function bases on light control capable of heightening the dielectric strength, by holding the reverse dielectric strength of a phototransistor with the dielectric strengths of the N type base and P type emitter of an SCR.

62. 发明专利

JPS5319739A REPRODUCING METHOD AND UNIT FOR PICTURE INFORMATION 失效
公开(公告)号：JPS5319739A
公开(公告)日：1978-02-23
申请号：JP9416776
申请日：1976-08-07
申请人： HITACHI LTD
发明人： SAGAWA AKIO
IPC分类号： H04N5/253 , G03B21/11 , G06F17/30
摘要： PURPOSE:Signals are taken out only when an effective picture information range is scanned on the basis of the position mark which is provided on a recording medium, thereby reproducing only effective picture information in case of a little mounting error of the recording medium such as a microfilm.

63. 发明专利

JPS51151114A SYNCHRONOUS SIGNAL COMPOSITE CIRCUIT 失效
公开(公告)号：JPS51151114A
公开(公告)日：1976-12-25
申请号：JP7442775
申请日：1975-06-20
申请人： HITACHI LTD
发明人： SAGAWA AKIO
IPC分类号： G11B20/08 , G11B5/09 , G11B20/12 , G11B20/14
摘要： PURPOSE:The synchronous signal composite circuit shall be provided, of which recording density of data signal is not decreased by the pulse recurrence interval of an index pattern.

64. 发明专利

JPS51147207A GAMMA CORRECTION CIRCUIT IN PULSEEPHASE MODULATION SYSTEM 失效
公开(公告)号：JPS51147207A
公开(公告)日：1976-12-17
申请号：JP7086475
申请日：1975-06-13
申请人： HITACHI LTD
发明人： SAGAWA AKIO
IPC分类号： H04N5/202 , H04B1/00 , H04B14/02 , H04N5/20
摘要： PURPOSE:To allow easy variation of a gamma correction value by performing a digital gamma correction in a signal processing system which provides display from PPM signals of picture information.

65. 发明专利

JPH0345575B2 失效
公开(公告)号：JPH0345575B2
公开(公告)日：1991-07-11
申请号：JP12481581
申请日：1981-08-11
申请人： HITACHI LTD
发明人： SAGAWA AKIO , SUZUKI MASAYOSHI , IZAKI NAOYUKI
IPC分类号： A61B8/00 , G01N29/04 , H03K5/02 , H03K17/66

66. 发明专利

JPS6444791A OPTICAL PICTURE POSTCARD 失效
公开(公告)号：JPS6444791A
公开(公告)日：1989-02-17
申请号：JP20173287
申请日：1987-08-14
申请人： HITACHI LTD
发明人： KOSAKA MASAHIRO , SAGAWA AKIO , UNNO MORIMICHI , TSUBOI NOBUYOSHI , OYAMA SHINJI
IPC分类号： B42D15/02
摘要： PURPOSE: To write a large amount of image characters and the voice information to a picture postcard to transmit the same to the other person, by forming an original picture information area and an additional information recording area on a communication face of an optical picture postcard, posting the optical, picture postcard prepared by coding and recording the information, and reproducing and outputting the same at a receiver side. CONSTITUTION: A communication face of an optical picture postcard 10 comprises an original picture information area 14 and an additional information recording area 15, and a large amount of fine coded information is printed and recorded on the original picture information area 14. On the other hand, a specific personal information, for example, an image, voice characters or the like is recorded on the additional information recording area 15 by a simplified printer as the code information. The optical picture postcard including the information is posted to be received by a receiving side and to be synthesized and outputted as an image and the voice by a reproducing unit 20. Accordingly various kinds of information can be transmitted.

67. 发明专利

JPS6322490B2 失效
公开(公告)号：JPS6322490B2
公开(公告)日：1988-05-12
申请号：JP13430680
申请日：1980-09-29
申请人： HITACHI LTD
发明人： SAGAWA AKIO , SUZUKI MASAYOSHI
IPC分类号： H03K3/72 , H03K3/78 , H03K5/156 , H03K7/08

68. 发明专利

JPS612306B2 JPS612306B2 - 失效
公开(公告)号：JPS612306B2
公开(公告)日：1986-01-23
申请号：JP13157877
申请日：1977-11-04
申请人： Hitachi Ltd
发明人： ITO TETSUO , SAGAWA AKIO
IPC分类号： H01L29/74 , H01L29/747
CPC分类号： H01L29/747

69. 发明专利

JPS6057310B2 失效
公开(公告)号：JPS6057310B2
公开(公告)日：1985-12-14
申请号：JP14504677
申请日：1977-12-05
申请人： HITACHI LTD
发明人： SAGAWA AKIO , SUZUKI MASAYOSHI
IPC分类号： H02M1/08 , H02M1/092

70. 发明专利

JPS6013559A DRIVE CIRCUIT OF CAPACITIVE LOAD 失效
公开(公告)号：JPS6013559A
公开(公告)日：1985-01-24
申请号：JP12254283
申请日：1983-07-05
申请人： HITACHI LTD
发明人： WADA MASAYUKI , SHIMURA TATSUO , KARIYA TADAAKI , IZAKI NAOYUKI , SUZUKI MASAYOSHI , SAGAWA AKIO
IPC分类号： B41J2/045 , B41J2/015 , B41J2/055 , H02N2/00 , H03K17/08 , H03K17/66 , B41J3/04
摘要： PURPOSE:To prevent the destruction of a switch at the time of output short- circuit by preventing an overcurrent, by providing a switch for changing the charge of capacitive load, a detection means for detecting a predetermined value or more of a current flowing to capacitive load and a control means for opening and closing the switch on the basis of a detection signal to the drive circuit of capacitive load. CONSTITUTION:One of the signal phi from an inlet terminal 4 is connected so as to open and close a first switch 1 through a control means 11 comprising a semiconductive apparatus control rectifier while the other thereof is connected so as to open and close a second switch 2 through an inverter 3 as a signal -phi complementary to the signal phi. That is, the first switch 1 and the second switch 2 are alternately opened and closed by the signal phi. In addition, a current detecting means 10 such as a resistor is provided between a first potential 6 and the first switch 1 to detect a predetermined value or more of an overcurrent and the control means 11 is controlled by the obtained detection signal.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式