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公开(公告)号：JP2004163527A
公开(公告)日：2004-06-10
申请号：JP2002326903
申请日：2002-11-11
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： TAKEDA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a projector for employing an illuminator with a semiconductor light emitting element such as an LED as a light source and displaying an image whose hue is not changed even when the variation of a temperature coefficient is found in the respective color LEDs.
SOLUTION: In the illuminator 10 of the projector 1, the intensity of respective color illuminating light beams 2 from the respective color LEDs 11r to 11b is sequentially detected by a common photoelectric conversion element 13, sampled by a common sample-hold circuit 31, and fed back to respective color driving circuits 12r to 12b by respective color comparator circuits 34r to 34b. Since a sampling system is made common to the respective color illuminating light beams 2, the individual difference of the sampling system is eliminated. Thus, the projector 1 capable of displaying the picture whose hue is not changed even when the variation of the temperature coefficient is found in the respective color LEDs 11r to 11b.
COPYRIGHT: (C)2004,JPO-
公开(公告)号：JP2004145249A
公开(公告)日：2004-05-20
申请号：JP2003057503
申请日：2003-03-04
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： TAKEDA TAKASHI , YONEKUBO MASATOSHI
CPC classification number: G03B21/2013 , G03B21/008 , G03B21/2033 , G03B33/06 , H04N9/3155 , H04N9/3164
Abstract: PROBLEM TO BE SOLVED: To provide a small-sized high-luminance image display device which uses a tilt-mirror device and a projector equipped with the same. SOLUTION: An image display device includes a first color-ray light-source 10 for supplying a G-ray, a second color-ray light-source 20 for supplying an R-ray or B-ray, and a tilt-mirror device 30 having a plurality of movable mirror elements 31 being alternatively switchable between a first reflection position and a second reflection position. The first color-ray light-source 10 is arranged so that the G-ray is reflected in a predetermined direction L1 when the movable mirror elements 31 are located in the first reflection position, while the G-ray is reflected in a direction L2 when the movable mirror elements 31 are located in the second reflection position; and the second color-ray light-source 20 is arranged so that the R-ray or B-ray is reflected in the predetermined direction L1 when the movable mirror elements 31 are located in the second reflection position, while the R-ray or B-ray is reflected in a direction L3 when the movable mirror elements 31 are located in the first reflection position. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2003330106A
公开(公告)日：2003-11-19
申请号：JP2002135640
申请日：2002-05-10
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： SAKATA HIDEFUMI , TAKEDA TAKASHI
IPC: G02B5/18 , F21S2/00 , F21V13/00 , F21Y101/02 , G02B3/00 , G02B19/00 , G02B27/28 , G02F1/13 , G02F1/133 , G02F1/1335 , G02F1/13357 , G03B21/00
Abstract: PROBLEM TO BE SOLVED: To provide an illuminator and a projection type display device which are small and lightweight.
SOLUTION: The illuminator being used in this projection type display device 1 is provided with: an LED array 2 emitting color rays of light having different colors; and a uniformly illuminating means which uniformizes illuminance of incident rays of light from the LED array and emits them. The uniformly illuminating means has a function for narrowing angular distribution of incident rays of light and also for uniformizing illuminance distribution of the incident rays of light and is constituted of a rod lens array 3 in which a plurality of rod lenses 8 each having a diffraction grating at both sides of an incident end face and an exiting end face are arranged in a flat surface shape or in a curved surface shape.
COPYRIGHT: (C)2004,JPOAbstract translation: 要解决的问题：提供一种小型轻量的照明器和投影型显示装置。 解决方案：在该投影型显示装置1中使用的照明装置设置有发射具有不同颜色的彩色光线的LED阵列2; 以及均匀照明装置，其使来自LED阵列的入射光的照度均匀化并发射。 均匀照明装置具有使入射光线的角度分布变窄并且还使入射光线的照度分布均匀化的功能，并且由棒状透镜阵列3构成，其中多个棒状透镜8具有衍射光栅 在入射端面的两侧和离开的端面被布置成平坦的表面形状或弯曲的表面形状。 版权所有（C）2004，JPO
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公开(公告)号：JP2003295315A
公开(公告)日：2003-10-15
申请号：JP2002101527
申请日：2002-04-03
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： SAKATA HIDEFUMI , TAKEDA TAKASHI
IPC: G02F1/13 , G02F1/133 , G02F1/1335 , G02F1/13357 , G03B21/00 , G03B21/14 , H04N5/74
Abstract: PROBLEM TO BE SOLVED: To provide a small-sized, thin, and lightweight projection type display device. SOLUTION: The projection type display device 1 principally comprises: an LED array 2 where a plurality of LEDs 7r, 7g, and 7b which can project respective color lights of R, G, and B are arrayed in a shape of a plane or a curved surface; a rod lens array 3 where a plurality of rod lenses 8 for making the color lights emitted by the LEDs 7r, 7g, and 7b uniform in luminance are arrayed in a shape of a plane or a curved surface; a PBS (polarized beam splitter) array 4 which applies polarization conversion to light made incident from the rod lens array 3; a liquid crystal light valve 5 which modulates respective color lights made incident from the PBS array 4 to compose an image; and a projection lens 6 which enlarges and projects the image composed by the liquid crystal light valve 5 on a screen 9. COPYRIGHT: (C)2004,JPO
Abstract translation: 要解决的问题：提供一种小型，薄型和轻型投影型显示装置。 ＆lt; P＆gt;解决方案：投影型显示装置1主要包括：LED阵列2，其中可以投影R，G和B的各个颜色的多个LED 7r，7g和7b排列成平面的形状 或曲面; 棒状透镜阵列3，其中用于使由LED 7r，7g和7b发出的颜色的亮度均匀的多个棒状透镜8排列成平面或曲面的形状; 将偏振转换应用于从棒状透镜阵列3入射的光的PBS（偏振光束分离器）阵列4; 液晶光阀5，调制从PBS阵列4入射的各种颜色的光以构成图像; 以及投影透镜6，其将由液晶光阀5构成的图像放大并投影到屏幕9上。（C）2004，JPO
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公开(公告)号：JP2003255242A
公开(公告)日：2003-09-10
申请号：JP2002058057
申请日：2002-03-04
Applicant: SEIKO EPSON CORP
Inventor： TAKEDA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide an optical switching device in which a high quality image having a high contrast ratio, brightness and no unevenness is displayed by eliminating the influence of diffraction light. SOLUTION: In the optical switching device 10 having a matrix part 11 on which a plurality of optical switching elements 20 which switch incident light 71 by varying the angle of reflection faces 21 are arranged in the row direction m and the column direction n, the form of micromirrors (reflection faces) 21 are formed into a hexagon which is formed with lines nonparallel in the row direction m. Thus, when an incident direction 81 and a switching direction 83 are in the column direction n, the angle of emitting direction of diffracted light 73a is varied with respect to the incident direction 81, the optical system is arranged in the direction perpendicular to the image. COPYRIGHT: (C)2003,JPO
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Patent Agency Ranking
公开(公告)号：JP2001249228A
公开(公告)日：2001-09-14
申请号：JP2001013358
申请日：2001-01-22
Applicant: SEIKO EPSON CORP
Inventor： TAKEKOSHI TARO , YONEKUBO MASATOSHI , TAKEDA TAKASHI , ARIMURA TOSHIO
IPC: G02B5/00 , G02B1/11 , G02B1/115 , G02B5/08 , G02B5/18 , G02B5/30 , G02B5/32 , G02B6/12 , G02B7/00 , G11B7/123 , G11B7/135 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To provide an optical head of high reliability with little variation by aging and temperature while realizing the simplification and non-adjustment of the assembly process, and to realize its miniaturization by a large functional combination. SOLUTION: Functions, such as an optical path length regulating function which makes optical path length of outward trip light flux differ from optical path length of return trip light flux, a polarized light separating function for detecting a magneto-optical signal, or a light flux reflecting function for guiding a part of light flux to a second photodetector for a light-emitting power detection, are assembled on an integral optical member. Thus, the optical member constitutes the cover of package of the optical head, and houses a photodetector and a light emitting element integrally.
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公开(公告)号：JP2001083439A
公开(公告)日：2001-03-30
申请号：JP26050999
申请日：1999-09-14
Applicant: SEIKO EPSON CORP
Inventor： YAMAUCHI TAISUKE , TAKEDA TAKASHI
IPC: G02B26/08
Abstract: PROBLEM TO BE SOLVED: To make the highest possible effective utilization of a supplied driving voltage and to decrease the driving voltage with a spatial optical modulation device, such as an optical switching element, utilizing evanescent light. SOLUTION: Stopper bases which come into contact with stoppers 65 on a substrate in positions where switching parts attain an off state are disposed under the stoppers 65 and these stopper bases are formed as bases equipotential to the base electrodes 62. As a result, the unnecessary charges accumulated in the base electrodes 62 are efficiently removed from the base electrodes 62 and therefore the highest possible effective utilization of the driving voltage as the driving force is possible. Further, the stopper bases are constituted as the same parts as anchors, by which the inter-electrode overlap areas of the electrodes 62, etc., may be largely taken and therefore the reduction of the driving voltage is made possible.
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公开(公告)号：JP2000066122A
公开(公告)日：2000-03-03
申请号：JP23332098
申请日：1998-08-19
Applicant: SEIKO EPSON CORP
Inventor： TAKEDA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a reliable micro-optical element by which a smaller micro- optical element array is realized and high-order resonance is suppressed, and a picture display element. SOLUTION: By inserting one part of the actuator 101 and the driving circuit of the adjacent micro-optical element to the lower part of the micro-optical element 401, the active optical element array whose driving voltage is low and whose individual optical element areas are extremely small is constituted. Thus, since volume efficiency is made excellent such contrary subjects that the size of the micro-optical element is made small and energy charged to a micro-actuator is reduced are simultaneously solved.
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公开(公告)号：JPH06290475A
公开(公告)日：1994-10-18
申请号：JP8653093
申请日：1993-04-13
Applicant: SEIKO EPSON CORP
Inventor： SEKI HIDEYA , TAKEDA TAKASHI , YONEKUBO MASATOSHI
Abstract: PURPOSE:To prevent high frequency from a means for reducing a laser noise, etc., from leaking to the outside of an optical head by covering the whole or a part of a laser diode, the reducing means for laser noise and a focus position control mechanism with a conductive shielding plate. CONSTITUTION:A magnet 2 generating magnetic field, a supporting spring 3 and a reducing means 5 for laser noise are provided on the periphery of a lens holder 1 and a laser beam emitted from a laser unit 12 inside the holder 1 is focused on a recording medium by means of a lens 10 through a diffracting means. The reducing means 5 for laser noise is composed of a high frequency generator and a buffer amplifier, the output is connected to the hot side of a laser chip, the coherency of a laser beam is reduced by the action of the reducing means 5 and a laser noise due to the returned light is reduced. A high frequency current flows inside the reducing means 5 and through a connection wire and, since the high frequency radiated in the air causes a noise, the leakage of high frequency is prevented by a shielding case 7. The case 7 is connected to the grounding wire of the laser unit 12 and the high frequency is absorbed to the ground.
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公开(公告)号：JPH06243502A
公开(公告)日：1994-09-02
申请号：JP2933893
申请日：1993-02-18
Applicant: SEIKO EPSON CORP
Inventor： KOYAMA FUMIO , YOKOYAMA OSAMU , SAKATA HIDEFUMI , YONEKUBO MASATOSHI , TAKEDA TAKASHI
Abstract: PURPOSE:To prevent unnecessary diffracted light in an outward path from straying and to obtain a high quality signal in spite of low-cost easy production. CONSTITUTION:When an opening limiting member 6 for preventing light from straying is disposed on a hologram element 2, the member 6 is formed with a resist material. The periphery of the member 6 is positioned at the inside of the periphery of the hologram element 2 and a transparent part is disposed at the outside. Such opening limiting members 6 can be accurately disposed only on parts requiring the members 6 in large quantities at a time by a series of easy processes such as coating, exposure and development under atmospheric pressure and the members 6 do not disturb the assembling or adjustment of magnetic heads.
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