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公开(公告)号：JPH06274926A
公开(公告)日：1994-09-30
申请号：JP6434893
申请日：1993-03-23
Applicant: SEIKO EPSON CORP
Inventor： TAKEKOSHI TARO , YONEKUBO MASATOSHI , TAKEDA TAKASHI , ARIMURA TOSHIO
Abstract: PURPOSE:To obtain a high-reliable optical head capable of simplifying its assembly process and eliminating its adjustment process, and small in a secular change or a temperature change, and to attain miniaturization by drastically combining functions. CONSTITUTION:An optical path length adjusting function which makes the optical path length of a going luminous flux 101f different from the optical path length of a returning luminous flux 101r, polarization separating function which detects an magneto-optical signal, or luminous flux reflecting function which guides one part of a luminous flux to a second light receiving element 170 for detecting an emitting power are set on an integrated optical member 120. The optical member is used as the cover of a package 80 of an optical head 1, and the light receiving element 170 or a light emitting element 10 are integrally housed. Thus, the initial offset of a focusing error signal can be removed, and the adjustment can be eliminated. Also, the detection of the magneto-optical signal or the emitting power can be attained by the integrated optical head.
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公开(公告)号：JPH04338689A
公开(公告)日：1992-11-25
申请号：JP11137591
申请日：1991-05-16
Applicant: SEIKO EPSON CORP
Inventor： TAKEDA TAKASHI
IPC: H01S5/00
Abstract: PURPOSE:To eliminate influence of stray light by covering the inside of a package in which a semiconductor laser chip is secured and protected, with a member in which a laser beam is scarcely reflected. CONSTITUTION:Divergent light is converted into a parallel light beam by a collimator lens 110, incident on a hologram element, and the transmitted light is condensed on a recording medium by a condensing optical system to record and reproduce information. A light reflected on the medium is partly diffracted by the hologram element 111, and passed through optical paths 108, 108 by the lens 110, and condensed on a photodetector 105. Thus, a servo error signal is detected, and the information is detected as a reproduced signal. A light 105 radiated outside from a window 102 of a package is emitted to a black nonreflecting member 103, and not then disordered in the package. Accordingly, the incident light on the package is not incident as stray light to a signal detecting sensor 105, but an excellent error signal having a small offset can be detected.
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公开(公告)号：JPH04186558A
公开(公告)日：1992-07-03
申请号：JP31752690
申请日：1990-11-21
Applicant: SEIKO EPSON CORP
Inventor： NAGAHASHI TOSHINORI , TAKEDA TAKASHI
Abstract: PURPOSE:To effectively correct and display, according to the request of a user, a data reproduced at a replay-only part by utilizing a direct storage device which is provided with a rewritable part and the replay-only part. CONSTITUTION:When instructions for a correction are issued from a correction instruction means 6 in the case of the correction, a part instructed for the correction and a corresponding position inside a file are obtained. An empty region in a rewritable part is detected from a space management table in a direct access storage device 5; a correction content is written; a correction management table is renewed by a space-compliance means 4. In the case of the display request of the file, the file is corrected by the correction management table which has been written; it is investigated whether the correction content exists in the rewritable part. When it has been corrected, the correction content is read out. When it has not been corrected, the content in a replay-only part is read out; the read-out content is displayed by a data display means 2. Thereby, a data can be corrected and displayed according to the request of a user.
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公开(公告)号：JPS6466836A
公开(公告)日：1989-03-13
申请号：JP22362287
申请日：1987-09-07
Applicant: SEIKO EPSON CORP
Inventor： MIYAZAWA TAKAO , TAKEDA TAKASHI
IPC: G11B7/125 , G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/30
Abstract: PURPOSE:To perform sure erasure even without using a high power laser, by pulse-driving a semiconductor laser by a pulse generation circuit to generate an erasing signal by an erasing pulse that channel bit clocks are summed. CONSTITUTION:A channel bit clock generation circuit 1, the pulse generation circuit 2 to generate the erase signal by the erasing pulse that the channel bit clocks are summed, and a pulse current driving circuit 3 to pulse-drive the semiconductor laser 4 by the pulse generation circuit 2, are provided. A disk clock 9 obtained from a recording medium is inputted to a pulse comparison circuit 14 from a terminal 7. Then, a bias current supplied from a bias current control circuit 6 and a current made flow in from the pulse current drive circuit 3 are summed. Thus, since the laser is pulse-driven at the time of the erasure when the largest power is required, the life of the semiconductor laser is prolonged, and the semiconductor laser of lower allowable power can be used.
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公开(公告)号：JPS6386123A
公开(公告)日：1988-04-16
申请号：JP23074986
申请日：1986-09-29
Applicant: SEIKO EPSON CORP
Inventor： YONEKUBO MASATOSHI , TAKEDA TAKASHI , NISHIDA SHIGERU
Abstract: PURPOSE:To reduce size and to improve performance by disposing a fine adjustment mechanism for a condensing means and parallel luminous flux generating means on the same side, stabilizing the quantity of light by using forward exit light and making tracking control by using a light reflection part provided to the fine adjustment mechanism. CONSTITUTION:The fine adjustment mechanism 117 for the condensing means having a revolving and sliding shaft 116 and the parallel luminous flux generating means 102 are disposed on the same side with respect to the Y-axis, by which the space is effectively utilized. The light reflected by a luminous flux separating means 104 is guided through a light receiving element 106 and a light quantity stabilizing circuit 107 to stabilize the output light quantity of a semiconductor laser 101. A mirror 118 consisting of a high reflection part and low reflection part having a distinct parting line is provided to the mechanism 117 and the detection and control of the tracking control are executed by a change in the quantity of the light of a light emitting part 119 and a light receiving part 120. The optical pickup which is small in size, has high stability in the quantity of light, outputs a servo signal of low noise and permits offset correction of the servo signal, is thus obtd.
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Patent Agency Ranking
公开(公告)号：JPS6374148A
公开(公告)日：1988-04-04
申请号：JP22064786
申请日：1986-09-18
Applicant: SEIKO EPSON CORP
Inventor： TAKEDA TAKASHI
IPC: G11B11/10 , G11B11/105
Abstract: PURPOSE:To suppress the increase of a crosstalk due to the extension of the recording bit by setting the entire surface of the recording film of a magneto- optical disk in the same magnetizing direction as said recording bit and performing the recording/reproducing/erasing operations on a guide groove. CONSTITUTION:The layer light is projected on a groove 1 together with the application of a magnetic field Hw and the magnetizing direction of a heated part is coincident with the magnetizing direction of the area 2 between grooves 1. Thus the heated part serves as a recording bit. In an erasion mode a magnetic field adverse to the field Hw of the recording mode is applied to the groove 1 together with the irradiation of the laser light. Thus the magnetizing direction of the area on the groove 1 is set equal to that of the area 2. In such a case, the laser power and the applied magnetic field are reduced compared with those of the recording mode in order to avoid the change of the magnetizing direction of the area 2. Therefore, the magnetizing direction of the groove 1 is kept coincident with that of the area 2 despite the increase of the bit length. As a result, the substantial bit width has no change and the increase of the crosstalk is suppressed.
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公开(公告)号：JPS6374129A
公开(公告)日：1988-04-04
申请号：JP22064886
申请日：1986-09-18
Applicant: SEIKO EPSON CORP
Inventor： HAMA TAKASHI , TAKEDA TAKASHI , YONEKUBO MASATOSHI
Abstract: PURPOSE:To stabilize the radiation power regardless of the return light without increasing the scale of constitution by providing a photodiode at a desired position. CONSTITUTION:A photodiode 9 is set between a semiconductor laser chip 1 and a coupling lens 3 and therefore the radiation power is satisfactorily monitored regardless of the return light. Based on this monitoring result, a semiconductor laser driving circuit 11 undergoes the negative feedback control. Thus the radiation power is stabilized regardless of the return light without increasing the scale of constitution.
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公开(公告)号：JP2014103480A
公开(公告)日：2014-06-05
申请号：JP2012252967
申请日：2012-11-19
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： TAKEDA TAKASHI , TOTANI TAKAHIRO , TAKAGI MASAYUKI , KOMATSU AKIRA , MIYAO TOSHIAKI
CPC classification number: G02B27/017 , G02B26/10 , G02B2027/011 , G02B2027/014 , G02B2027/0178
Abstract: PROBLEM TO BE SOLVED: To provide a virtual image display device capable of widening a video region effectively available as a non-distorted image by reducing a correction amount of trapezoidal correction and avoiding generation of a useless region which may be left without being used, as far as possible when performing the trapezoidal correction in an image projection.SOLUTION: A trapezoidal correction processing section 53 performs trapezoidal correction (distortion correction) on video regions RR, LL being divided video regions divided into a plurality of regions, individually in accordance with divided video regions RR1, RR2, LL1, LL2. In such a case, each of the video regions RR, LL is divided into a plurality of regions. Further, trapezoidal correction in a pair of right and left virtual image forming sections 20 is performed in mirror symmetry and in the virtual image forming section 20, central positions (centers EX1, EX2) of eyes of a wearing person are adjusted so as to be matched to a non-distorted image with a little correction amount.
Abstract translation: 要解决的问题：为了提供一种虚拟图像显示装置，其能够通过减少梯形校正的校正量并避免产生不被使用的无用区域，从而有效地获得可视为非失真图像的视频区域，作为 在图像投影中执行梯形校正时，尽可能地进行。解决方案：梯形校正处理部53对视频区域RR，LL进行梯形校正（失真校正），分割成多个区域，根据分割 视频区域RR1，RR2，LL1，LL2。 在这种情况下，视频区域RR，LL中的每一个被分成多个区域。 此外，在左右一对虚拟图像形成部20中进行镜像对称的梯形校正，在虚拟图像形成部20中，调整佩戴者的眼睛的中心位置（中心EX1，EX2），使其成为 匹配到具有少量校正量的非失真图像。
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公开(公告)号：JP2014038226A
公开(公告)日：2014-02-27
申请号：JP2012180797
申请日：2012-08-17
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： TOTANI TAKAHIRO , TAKAGI MASAYUKI , MIYAO TOSHIAKI , KOMATSU AKIRA , TAKEDA TAKASHI
CPC classification number: G02B27/0172 , G02B2027/012 , G02B2027/0178
Abstract: PROBLEM TO BE SOLVED: To provide a virtual image display device that has a see-through function for combining and displaying external light and video light, is reduced in size and in weight while having a wide view angle and high performance and can suppress occurrence of a ghost.SOLUTION: It is possible to suppress occurrence of a ghost and to form an image having good quality by removing components reflecting in an unintended manner out of video light beforehand by light-shielding members 40 that are light-shielding structures disposed at exit pupil positions PP. Further, video light GL totally reflected by two or more surfaces in order of third surfaces S13, first surfaces S11 and second surfaces S12 is transmitted through the first surfaces S11 and reaches eyes EY of an observer while intermediate images are being formed inside prisms 10 by projection lenses 30 or the like. Accordingly, display having a wide view angle, brightness and high performance can be realized while the prisms 10 are being reduced in thickness and an entire optical system is being reduced in size and in weight.
Abstract translation: 要解决的问题：为了提供具有用于组合和显示外部光和视频光的透视功能的虚拟图像显示装置，其尺寸和重量减小，同时具有宽的视角和高性能，并且可以抑制 鬼魂。解决方案：可以通过由设置在出口处的光屏蔽结构的遮光构件40预先通过去除视频光中以非预期的方式反射的组件来抑制重影的发生并形成具有良好质量的图像 瞳孔位置PP。 此外，通过第三表面S13，第一表面S11和第二表面S12的顺序由两个或更多个表面全反射的视频光GL被透射穿过第一表面S11并到达观察者的眼睛EY，同时在棱镜10内由中间图像形成中间图像10 投影透镜30等。 因此，当棱镜10的厚度减小并且整个光学系统的尺寸和重量减小时，可以实现具有宽视角，亮度和高性能的显示。
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公开(公告)号：JP2013225042A
公开(公告)日：2013-10-31
申请号：JP2012097421
申请日：2012-04-23
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： TAKAGI MASAYUKI , TOTANI TAKAHIRO , TAKEDA TAKASHI , KOMATSU AKIRA , MIYAO TOSHIAKI
IPC: G02B27/02
CPC classification number: G06F3/012 , G02B26/10 , G02B27/017 , G02B2027/0178 , G02B2027/0187
Abstract: PROBLEM TO BE SOLVED: To provide a virtual image display device that adjusts a screen position in response to a change in posture of a wearer and can alleviate a sense of discomfort due to virtual image display received by the wearer.SOLUTION: A posture information detection section 60 detects a posture of a wearer. An arithmetic processing unit 70 and a device position driving device 80 that are screen position adjustment mechanisms relatively and translationally move a liquid crystal display device 32 that is a light modulation element with respect to a light guide device 20 in an in-plane parallel to a light incident surface IS of the light guide device 20 on the basis of detection results of the posture information detection section 60 to control change of a position of a screen such that a video is reversely moved to motion of the wearer. On account of this, each image can be watched by the wearer as if each image remained there without following the motion of the wearer even when the wearer moves. Accordingly, a sense of discomfort due to the motion of the wearer can be alleviated even when the wearer moves.
Abstract translation: 要解决的问题：提供一种虚拟图像显示装置，其响应于佩戴者的姿势变化来调整屏幕位置，并且可以减轻由于穿戴者接收的虚拟图像显示引起的不适感。解决方案：姿势信息检测 部分60检测佩戴者的姿势。 作为屏幕位置调整机构的运算处理单元70和装置位置驱动装置80相对于平行于平面地平移地移动作为光导装置20的光调制元件的液晶显示装置32 基于姿势信息检测部60的检测结果来控制导光装置20的光入射面IS，以控制使视频反向移动到佩戴者的运动的屏幕的位置的变化。 由于这个原因，每个图像可以被佩戴者观看，好像每个图像保持在那里，而不用佩戴者的运动，即使穿着者移动。 因此，即使穿着者移动，也能够减轻由于穿着者的运动引起的不适感。
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