公开(公告)号：DE69808318D1

公开(公告)日：2002-10-31

申请号：DE69808318

申请日：1998-04-17

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  SHIMODA TATSUYA ,  MIYASHITA SATORU

IPC: G02B26/08

公开(公告)号：DE69930646T2

公开(公告)日：2007-01-18

申请号：DE69930646

申请日：1999-09-01

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  MIYASHITA SATORU ,  SHIMODA TATSUYA ,  TAGA YASUNORI ,  TOKITO SHIZUO ,  NODA KOJI

IPC: H05B33/12 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00 ,  G09G3/34 ,  H01L27/32 ,  H04N5/74 ,  H04N9/31 ,  H05B33/00 ,  H05B33/14 ,  H05B44/00

Abstract: At the rear of liquid crystal display elements 11R 11G, an 11B, each for displaying one component of a primary color, a red EL light source 10R, a green EL light source 10G and a blue EL light source 10B for emitting red color light, green color light, and blue color light are disposed, respectively. Each EL light source includes an organic EL element in which an organic thin film emits light. Each EL light source has a structure in which an organic luminescent layer 14 is sandwiched between an ITO electrode 13 and a metal electrode 15 which have striped patterns which are orthogonal to each other, and sections (luminescent sections) at which the striped patterns of the ITO electrode 13 and the metal electrode 15 intersect with each other emit light. The luminescent sections are arrayed two-dimensionally on a glass substrate 12 and illuminate the entire display area of the liquid crystal display element.

公开(公告)号：AT344936T

公开(公告)日：2006-11-15

申请号：AT99923922

申请日：1999-06-04

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  SHIMODA TATSUYA ,  MIYASHITA SATORU

IPC: G02B27/14 ,  G02F1/13357 ,  G02B27/10 ,  G02B27/02 ,  G02B27/18 ,  G02B26/08 ,  G02F1/13 ,  G02F1/1335

Abstract: A red light source comprising an array of LEDs 102R that emit light of a red color, a green light source comprising an array of LEDs 102G that emit light of a green color, and a blue light source comprising an array of LEDs 102B that emit light of a blue color are deployed about the periphery of a dichroic prism 101. A liquid crystal display element is illuminated by a light source device configured such that the light from the respective light sources is synthesized into white light by the dichroic prism, and projection type liquid crystal display devices and the like are configured.

公开(公告)号：DE69926598D1

公开(公告)日：2005-09-15

申请号：DE69926598

申请日：1999-07-23

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  SHIMODA TATSUYA ,  MIYASHITA SATORU

IPC: G02F1/13357 ,  H04N9/30 ,  G09F9/00

Abstract: There is provided behind an optical modulation panel (101) which is not provided with a color filter a planar light source which is provided with EL elements (100R, 100G and 100B) with a built-in optical resonator structure adapted to emit light in red, green and blue and which are periodically arranged on a single glass substrate (103). Lights of different colors obtained by lighting the EL elements (100R, 100G and 100B) are modulated by an optical modulation panel (101) to obtain a color image.

公开(公告)号：DE69727125T2

公开(公告)日：2004-11-11

申请号：DE69727125

申请日：1997-09-24

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  MIYASHITA SATORU ,  KAMAKURA HIROSHI ,  SHIMODA TATSUYA

IPC: G02F1/13357 ,  G03B21/16 ,  H04N9/31 ,  H05B33/02

Abstract: A projection display apparatus employing organic EL elements is presented that is light in weight, is small in size, and can be practically implemented. In particular, the apparatus suppresses light-emission performance degradation caused by generated heat, thereby extending useful life, stabilizing brightness, and securing continual maximum brightness. The apparatus comprises: liquid crystal panels 12R, 12G, and 12B; light emitting units 13R, 13G, and 13B, positioned at the back of the liquid crystal panels and provided with organic EL elements as light emitting layers; and cooling bodies 14R, 14G, and 14B, positioned at the back of the light emitting units, for dispersing the heat generated by the light emitting layers. The cooling bodies 14R, 14G, and 14B may, for example, be electronic cooling elements that employ the Peltier effect to absorb and radiate the generated heat. Alternatively, the cooling bodies may be configured as heat-dispersing fins that guide and disperse generated heat.

公开(公告)号：DE69628634T2

公开(公告)日：2004-04-29

申请号：DE69628634

申请日：1996-11-06

Applicant: SEIKO EPSON CORP

Inventor： MIYASHITA SATORU ,  YOKOYAMA OSAMU ,  FUNAMOTO TATSUAKI

IPC: F21V8/00 ,  G02B6/00

Abstract: A lighting apparatus (10) comprises: light emitting means (322); light guiding means (307) which has a light-output-side surface and guides the light from said light emitting means (322) through said light-output-side surface toward a light receiving element (302) with an improved directivity; and direction changing means for changing the direction of the light which is output from said light guiding means (307) to a direction substantially perpendicular to said light receiving element (302). The direction changing means (321) includes a prism array which comprises a plurality of prisms, each of said prisms having an apex pointing to said light-output-side surface; wherein each of said prisms has a first surface for receiving the light and a second surface, said apex being formed by said first and second surfaces.

公开(公告)号：DE69727125D1

公开(公告)日：2004-02-12

申请号：DE69727125

申请日：1997-09-24

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  MIYASHITA SATORU ,  KAMAKURA HIROSHI ,  SHIMODA TATSUYA

IPC: G02F1/13357 ,  G03B21/16 ,  H04N9/31 ,  H05B33/02

Abstract: A projection display apparatus employing organic EL elements is presented that is light in weight, is small in size, and can be practically implemented. In particular, the apparatus suppresses light-emission performance degradation caused by generated heat, thereby extending useful life, stabilizing brightness, and securing continual maximum brightness. The apparatus comprises: liquid crystal panels 12R, 12G, and 12B; light emitting units 13R, 13G, and 13B, positioned at the back of the liquid crystal panels and provided with organic EL elements as light emitting layers; and cooling bodies 14R, 14G, and 14B, positioned at the back of the light emitting units, for dispersing the heat generated by the light emitting layers. The cooling bodies 14R, 14G, and 14B may, for example, be electronic cooling elements that employ the Peltier effect to absorb and radiate the generated heat. Alternatively, the cooling bodies may be configured as heat-dispersing fins that guide and disperse generated heat.

公开(公告)号：DE69502643D1

公开(公告)日：1998-07-02

申请号：DE69502643

申请日：1995-02-28

Applicant: SEIKO EPSON CORP

Inventor： IWANO HIDEAKI ,  YOKOYAMA OSAMU ,  NOMURA HIROAKI

IPC: H01S3/00 ,  H01S5/00 ,  H01S5/028 ,  H01S5/20 ,  H01S5/343 ,  H01S3/19 ,  H01S3/025 ,  G01B11/00

Abstract: A semiconductor laser comprises AlGaAs-type semiconductor layers (SL) deposited on a substrate (101) and a current constriction layer (109) having at least one stripe-shaped current injection region (112). The semiconductor layers comprise: a first cladding layer (103) of the first conductivity type, a first optical waveguide layer (104) of the first conductivity type formed on the first cladding layer, an active layer (105) formed on the first optical waveguide layer and having a quantum-well structure, a second optical waveguide layer (106) of a second conductivity type formed on the active layer, a second cladding layer (107) of the second conductivity type formed on the second optical waveguide layer, and a contact layer (108) formed on the second cladding layer. The active layer has flatness of such a degree that roughness with respect to a reference surface within a unit area of 1 mm x 1 mm is no more than +/-0.1 mu m, the width of the current injection region of the current constriction layer is between 100 mu m to 250 mu m, and the resonator length is between 500 mu m to 1,000 mu m. This semiconductor laser is part of a light-sensing device which contains a light receiving optical system and further a light-transmitting optical system comprising a diffraction grating and a lens with toric or anamorphic aspheric surface.

公开(公告)号：DE69119658D1

公开(公告)日：1996-06-27

申请号：DE69119658

申请日：1991-07-10

Applicant: SEIKO EPSON CORP

Inventor： YOKOYAMA OSAMU ,  YONEKUBO MASATOSHI ,  IWANO HIDEAKI ,  SAKATA HIDEFUMI ,  TAKEDA TAKASHI ,  SEKI TETSUYA ,  KOGURE SHIGERU

IPC: G11B7/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105

Abstract: A small and inexpensive optical head for detecting a recorded signal, a focusing error signal and a tracking error signal, and an optical memory device utilizing the optical head. A diffraction device (103) is provided having two chirped grating regions (103A, 103B) for dividing a light beam from an optical recording medium (105) and directing the divided beams toward four band-shaped photoelectric transducers (106) and an astigmatism generator formed by the diffraction means (103) and a positive lens (102). The four photoelectric transducers are positioned in a plane inclined with respect to the optical axis of zero-order diffraction light, and the longitudinal axes of each of the band-shaped photoelectric transducers are radially arranged relative to the optical axis.

公开(公告)号：DE69113127T2

公开(公告)日：1996-03-21

申请号：DE69113127

申请日：1991-06-12

Applicant: SEIKO EPSON CORP

Inventor： KATO KAZUTOSHI ,  KATADA TOSHIHARU ,  YOKOYAMA OSAMU

IPC: G02C7/02