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1. 发明专利

JPH087354A INFORMATION RECORDING MEDIUM, MANUFACTURE OF THE SAME AND INFORMATION RECORDING APPARATUS 失效
公开(公告)号：JPH087354A
公开(公告)日：1996-01-12
申请号：JP14033194
申请日：1994-06-22
申请人： HITACHI LTD , HITACHI MAXELL
发明人： ANDO KEIKICHI , MIYAMOTO JIICHI , USHIYAMA JUNKO , AWANO HIROYUKI , ANZAI YUMIKO , MAEDA TAKESHI , SUGIYAMA HISATAKA
IPC分类号： G11B11/105 , G11B7/00 , G11B7/24 , G11B7/30 , G11B11/10
摘要： PURPOSE:To form, on a recording layer, an information recording region which is smaller than half (1/2) of the optical spot diameter. CONSTITUTION:A region 7 having a relatively larger recording sensitivity and a region 6 having a relatively smaller recording sensitivity are formed on a magnetic layer 3. The region 7 having the relatively larger recording sensitivity is irradiated with a beam spot which is larger than such region to generate an information recording region only in the area irradiated by such beam spot of the region 7. As a result, the information recording region which is smaller than the half (1/2) of the beam spot diameter can be formed on the recording layer. Thereby, the recording with the density higher than the existing density can be realized.

2. 发明专利

JPH04274032A OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH04274032A
公开(公告)日：1992-09-30
申请号：JP5358091
申请日：1991-02-27
申请人： HITACHI MAXELL , HITACHI LTD
发明人： SAKAMOTO AKITO , INAGOYA OSAMU , MAEDA TAKESHI
IPC分类号： G11B7/09 , G11B11/10 , G11B11/105
摘要： PURPOSE:To prevent the tracking information signal in ROM area obtained in three-beam system from being influenced by the density of prepit for the optical information carrier in which ROM area and non-ROM are mixed. CONSTITUTION:When the two sub-light beam reproduces ROM area, the alternating components are generated by performing the amplitude modulation by the prepit. In these alternating components, the larger the density in the prepit is, the smaller the amplitude becomes. Therefore, the output signals in photodiodes 15b, 15c receiving sub-light beam are made into the waveform and equalized so that the higher frequency may be, the larger the amplitude may become in differential circuits 35, 36 and the influence by the prepit is removed. A tracking information signal (d) is formed from the alternating component of output signals in the differential circuits 35, 36 by upper side envelope detection circuits 37, 38, lower side envelope detection circuits 39, 40 and an arithmetic amplifier 41.

3. 发明专利

JPH0329168A INFORMATION RECORDING DISK 失效
公开(公告)号：JPH0329168A
公开(公告)日：1991-02-07
申请号：JP16267189
申请日：1989-06-27
申请人： HITACHI MAXELL , HITACHI LTD
发明人： IIDA TAMOTSU , ARAI SHINICHI , MAEDA TAKESHI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007 , G11B20/12
摘要： PURPOSE:To assure a sufficient jitter margin at all times regardless of the inner and outer peripheries of a recording region by forming the disk in such a manner that the pit pitch of the header signal written in the block of the outer periphery is longer than the pit pitch of the header signal written in in the block of the inner periphery. CONSTITUTION:The substrate 2 having a center hole 1 is provided with the annular recording region 3 concentrical with the center hole 1 in a central region exclusive of the innermost peripheral part and outermost peripheral part of the substrate. A part of this recording region 3 is so preformatted that the pit pitch (p) of the header signal 7 written in the innermost peripheral recording track of the outer peripheral block 4b of, for example, two adjacent blocks 4a, 4b is longer than the pit pitch (p) of the header signal 7 written in the innermost peripheral track of the inner peripheral block 4a. The decrease in the window width by the increase of the linear speed of the recording tracks is, therefore, relieved by the increase of the pit pitch of the header signal 7. The always sufficient jitter margin is assured in this way regardless of the inner and outer peripheries of the recording region 3 in this way.

4. 发明专利

JP2005203046A Information recording medium, information recording method and recording device 审中-公开
标题翻译：信息记录介质，信息记录方法和记录装置
公开(公告)号：JP2005203046A
公开(公告)日：2005-07-28
申请号：JP2004009737
申请日：2004-01-16
申请人： Hitachi Ltd , Hitachi Maxell Ltd , 日立マクセル株式会社 , 株式会社日立製作所
发明人： TERAO MOTOYASU , MAEDA TAKESHI , KOJIMA KYOKO , TAMURA NORIHITO , NAGANO HIDEKI , AWANO HIROYUKI , KAMISADA TOSHIMASA
IPC分类号： G11B7/24 , G11B7/004 , G11B7/007 , G11B7/244
摘要： PROBLEM TO BE SOLVED: To achieve high-speed recording and high-density recording regarding an information recording medium, an information recording method, and an information recording device in which the information is recorded and reproduced utilizing a light beam. SOLUTION: Voltage is applied to a recording layer sandwiched between a pair of transparent or translucent electrodes. The layer is arranged in which absorption or reflectance spectrum changes with applied voltage as the recording layer itself or other layer adjacent to the recording layer with a state where transmittance is high to the light beam for the recording or reproducing. The end of the transparent or translucent electrode is concentrically arranged at an inner circumference portion of the disc as the recording medium. This electrode is connected to the electrode on the surface of a substrate and the voltage is applied via the disc press or its neighborhood having the electrode corresponding to this. A group of slip rings are used which can move a brush from an immovable part to a movable part of a drive device. When multibeam parallel recording is performed, speeding up is made possible. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了实现关于信息记录介质，信息记录方法和信息记录装置的高速记录和高密度记录，其中使用光束记录和再现信息。解决方案：将电压施加到夹在一对透明或半透明电极之间的记录层。布置层，其中吸收或反射光谱随着施加的电压而变化，作为记录层本身或与记录层相邻的其它层，其具有对于用于记录或再现的光束的透射率高的状态。透明或半透明电极的端部作为记录介质同心地布置在盘的内圆周部分。该电极连接到基板表面上的电极，并通过盘压机或其邻近的电极施加电压，该电极对应于该电极。使用一组滑环，其可以将刷子从不动部件移动到驱动装置的可移动部件。当执行多波束并行记录时，可以加快速度。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JPH06150427A MAGNETO-OPTICAL RECORDING SYSTEM 失效
公开(公告)号：JPH06150427A
公开(公告)日：1994-05-31
申请号：JP30077992
申请日：1992-11-11
申请人： HITACHI LTD , HITACHI MAXELL
发明人： KIRINO FUMIYOSHI , YOSHIHIRO MASASHI , IDE HIROSHI , TODA TAKESHI , MAEDA TAKESHI , TSUCHINAGA HIROYUKI , OTA NORIO
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B11/10 , G11B11/105
摘要： PURPOSE:To stably increase the number of times of a test in recording on a test area by performing test recording on a part different from the test last area when one track is divided into plural areas. CONSTITUTION:A test track 1, a data recording part 2, a zone switching part 3, and a sector mark 4 are provided on the innermost periphery of a disk. In such a case, the test recording on the sectors starting from a 0-th sector to an eighth sector are performed continuously, and the case that the test recording are performed on the same sectors is compared with the case that the test recording are performed on the sectors at every second starting from the 0-th sector and the test recording are performed on the sectors unused previously. When reproducing signal output after the recording/erasure for 10 times are compared, no change in a C/N can be recognized in the latter case, however, the C/N is increased by 1.5dB in the former case. This is because the recording sensitivity of recording film is increased by the repeat of recording/erasure, and a recording magnetic domain larger than the one in the initial stage of disk manufacturing is formed.

6. 发明专利

JPH0289231A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0289231A
公开(公告)日：1990-03-29
申请号：JP23973388
申请日：1988-09-27
申请人： HITACHI MAXELL , HITACHI LTD
发明人： WATANABE HITOSHI , MAEDA TAKESHI
IPC分类号： G11B7/085
摘要： PURPOSE:To omit an additional bit and to accurately execute access operation by detecting a data bit recorded on a sample servo type optical disk. CONSTITUTION:Data bits are recorded in respective data areas of the optical disk and reflected light from the optical disk is detected by a photodetector 1. The reflected light is modulated at its intensity by a data bit every time when an optical spot crosses each track and modulated at its intensity by a servo bit every time when the optical spot crosses a servo area As, so that an output signal A from the photodetector 1 is also modulated at its level by these bits. The output signal A of the photodetector 1 is supplied to a signal separating/processing circuit 2 and separated into a signal based upon the data bit and a signal based upon the servo bit and a track crossing signal SCR and a tracking error signal Str are formed respectively from these signals. Consequently, the moving direction of the optical spot can be detected without using an additional bit and access can be executed by the sample servo type optical disk.

7. 发明专利

JPH01300429A DRAW TYPE OPTICAL INFORMATION RECORDING MEDIUM, OPTICLAL INFORMATION RECORDING MEDIUM DRIVING DEVICE AND MASTER DISK CUTTING DEVICE 失效
公开(公告)号：JPH01300429A
公开(公告)日：1989-12-04
申请号：JP13031388
申请日：1988-05-30
申请人： HITACHI MAXELL , HITACHI LTD
发明人： NUNOMURA TOYOYUKI , SAITO ATSUSHI , MAEDA TAKESHI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/24 , G11B7/26
摘要： PURPOSE:To execute the transmission and reception of signals between DRAW type information recording media and to enable cutting of the master disk thereof by providing phase correction parts which invert the phase of the information recorded in the regions of preformat parts and data parts to a non-recording state behind said parts. CONSTITUTION:The phase correction parts 8, 15 which invert the phases of the information recorded in the regions 5, 6 to the non-recording state are provided behind the preformat parts 5 and data parts 6 of respective sectors formed by dividing the recording regions. The final address pits can be formed to the type of closing the rear edge thereof if the phase correction part 8 which inverts the phases of the address signal recorded behind the preformat part 5 is provided. The final recording part can be formed to the type of closing the rear edge thereof if the phase correction part 15 which inverts the phase of the user information recorded behind the data part 6 to the non-recording state is provided. The transmission and reception of the signals are executed between the DRAW type information recording media in this way and the cutting of the master disk for said media is enabled.

8. 发明专利

JPH01263964A OPTICAL DISK RECORDING AND REPRODUCING SYSTEM 失效
公开(公告)号：JPH01263964A
公开(公告)日：1989-10-20
申请号：JP8906088
申请日：1988-04-13
申请人： HITACHI LTD , HITACHI MAXELL
发明人： MAEDA TAKESHI , WATANABE HITOSHI , TSUNODA YOSHITO
IPC分类号： G11B7/00 , G11B7/004 , G11B11/10 , G11B11/105
摘要： PURPOSE:To access data at a high speed without producing out-of-track by providing one pre-pit pattern for synchronization at every plural pre-pit pairs and detecting positional information as well as the phase of a displaced pit. CONSTITUTION:Pit patterns are repeatedly provided at every section (n), (n+1), etc., which are punctuation units of data along one track on the surface of a disk and an ID section having address information and other control information is provided at the leading section of each sector (n). In addition, pre-pits which slightly meander on both right and left sides against the center of the track are arranged and data are recorded in the sections between the pre-pits. Moreover, marks for synchronization are formed on the disk in the form of pre-pits and the phase of the meandering and positions of the pre-pits are decided by detecting the marks and, furthermore, empty areas are provided around the pre-pits. While recording pulses are dislocated from a magnetic domain formed in a magnetic field modulation overwrite system, self-clocking is performed for producing reproducing clocks, since the dislocation between the magnetic domain and recording pulses are fixed. Therefore, data can be accessed without out-of-track.

9. 发明专利

JPH01245449A OPTICAL INFORMATION RECORDER 失效
公开(公告)号：JPH01245449A
公开(公告)日：1989-09-29
申请号：JP6951688
申请日：1988-03-25
申请人： HITACHI LTD , HITACHI MAXELL
发明人： NAKAO TAKESHI , MAEDA TAKESHI , SAITO ATSUSHI , WATANABE HITOSHI , SAKAMOTO AKITO , NAGAI NOBUYUKI , SUGIYAMA TOSHINORI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To obtain the title device having large capacity and high data transferring speed even though the size of the device is small by inverting the polarity of a magnetic field impressed to a recording film according to recorded information, arranging plural light spots on the same recording track, and checking errors immediately after recording. CONSTITUTION:A magneto-optical disk 201 has a recording film 2011 having a magneto-optical effect and a protecting coat 2012 on a disk-shaped transparent substrate 2013. Further, the magneto-optical disk 201 rewrites the recorded information in the process of cooling the recording film 2011 after raising the temperature of the recording film 2011 with high output laser light 202 and dissipating the magnetization of the recording film 2011. Consequently, since magnetization domains to be recorded are determined in the process of cooling the recording film 2011, no thermal mutual intervention between the magnetization domains exists, and further, for example, the recording density of 1mum/bit or higher can be sufficiently obtained. Thus, recording capacity about 100MB can be easily attained for one disk 201 even when the device is about a so-called 3.5-inch optical disk unit, for example.

10. 发明专利

JP2004273055A Information holding medium, and information recording method and system 审中-公开
公开(公告)号：JP2004273055A
公开(公告)日：2004-09-30
申请号：JP2003064330
申请日：2003-03-11
申请人： Hitachi Ltd , Hitachi Maxell Ltd , 日立マクセル株式会社 , 株式会社日立製作所
发明人： KOJIMA KYOKO , TERAO MOTOYASU , MIYAMOTO JIICHI , MINEMURA HIROYUKI , MAEDA TAKESHI
IPC分类号： B41M5/26 , G11B7/004 , G11B7/24 , G11B7/241 , G11B7/244
摘要： PROBLEM TO BE SOLVED: To provide a high-speed optical information recording method, an information holding medium, and system. SOLUTION: Electrode layers 213 and 216 hold both sides of: an information layer 214 which includes a conductive polymer electrochromic material the light absorbance of which changes when the material enters into a polaron state or biopolaron state; and an electrolytic layer 215 which is disposed in contact with the information layer and has the ions to diffuse into the information layer by voltage application. By employing such configuration, the high-speed optical information recording method and a large-capacity information recording medium and system allowing multilayering with a simple configuration are obtained. COPYRIGHT: (C)2004,JPO&NCIPI

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