公开(公告)号：US20170182753A1

公开(公告)日：2017-06-29

申请号：US15316035

申请日：2015-06-04

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA ,  Akira FURUTA

IPC: B32B27/32 ,  G02F1/1335 ,  B32B7/12 ,  B32B3/30 ,  B32B27/06

CPC classification number: B32B27/325 ,  B32B1/00 ,  B32B3/30 ,  B32B7/06 ,  B32B7/12 ,  B32B17/00 ,  B32B27/00 ,  B32B27/06 ,  B32B27/08 ,  B32B27/18 ,  B32B27/22 ,  B32B27/24 ,  B32B27/285 ,  B32B27/308 ,  B32B27/40 ,  B32B2255/10 ,  B32B2255/20 ,  B32B2255/26 ,  B32B2264/0207 ,  B32B2270/00 ,  B32B2307/408 ,  B32B2307/412 ,  B32B2307/418 ,  B32B2307/54 ,  B32B2307/546 ,  B32B2307/558 ,  B32B2307/7145 ,  B32B2307/7246 ,  B32B2307/732 ,  B32B2457/202 ,  B32B2457/204 ,  B32B2457/206 ,  C09J7/241 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/318 ,  C09J2421/00 ,  C09J2423/00 ,  G02F1/133308 ,  G02F1/133502 ,  G02F2001/133331 ,  G02F2201/501 ,  G02F2202/022 ,  G02F2202/28

Abstract: A sheet for an image display unit to be provided on the front face side of an image display unit includes a substrate layer containing a cycloolefin copolymer as a principal component and an elastomer having a refractive index substantially equal to the refractive index of the cycloolefin copolymer, in an amount of no less than 2 parts by mass and no greater than 7 parts by mass with respect to 100 parts by mass of the cycloolefin copolymer. The substrate layer preferably has an average thickness of no less than 100 μm and no greater than 500 μm, a water absorbing rate preferably no greater than 0.5%, a tensile strength of preferably no less than 40 MPa and no greater than 70 MPa, and a tensile elongation in a longitudinal direction at 25° C. is preferably no less than 4% and no greater than 15%.

公开(公告)号：US20170176663A1

公开(公告)日：2017-06-22

申请号：US15316065

申请日：2015-06-08

Applicant: KEIWA INC.

Inventor： Akira FURUTA ,  Hironori NAKASHIMA

IPC: F21V8/00

CPC classification number: G02B6/0031 ,  G02B6/002 ,  G02B6/0051 ,  G02B6/0055

Abstract: The edge-lit backlight unit according to the present invention includes a light guide film having an average thickness of no less than 100 μm and no greater than 600 μm; at least one thin light source disposed so as to face at least one end face of the light guide film, in which rays of light emitted from the thin light source exit from a front face of the light guide film; and a first reflection tape disposed so as to cover a front face side of an end edge on a side of the at least one thin light source of the light guide film. The first reflection tape may be disposed so as to cover a front face side of a gap between the at least one thin light source and the light guide film.

公开(公告)号：US20150234114A1

公开(公告)日：2015-08-20

申请号：US14626239

申请日：2015-02-19

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA ,  Kenichi HARADA

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0036 ,  G02B6/0043 ,  G02B6/0055 ,  G02B6/0058 ,  G02B6/0088

Abstract: An optical waveguide sheet for use in an edge-lit backlight unit is provided, that allows rays of light to enter the end face and emits the rays of light from the front face substantially uniformly. The optical waveguide sheet includes, on the back side thereof: a plurality of recessed portions falling toward the front face side; and a plurality of raised portions each provided around each of the plurality of recessed portions and projecting toward the back face side. The optical waveguide sheet preferably has an average thickness of no less than 100 μm and no greater than 600 μm, and is preferably used as a light guide film. The optical waveguide sheet preferably has an average thickness of no less than 100 μm and no greater than 600 μm, and is preferably used as a light guide film.

Abstract translation: 提供了一种用于边缘照明背光单元的光波导片，其允许光线进入端面并基本上均匀地从前面发射光线。 所述光波导片的背面具有朝向所述正面侧的多个凹部， 以及多个凸起部分，每个凸起部分设置在所述多个凹部中的每一个周围并且朝向所述背面侧突出。 光波导片优选具有不小于100μm且不大于600μm的平均厚度，并且优选用作导光膜。 光波导片优选具有不小于100μm且不大于600μm的平均厚度，并且优选用作导光膜。

公开(公告)号：US20150234113A1

公开(公告)日：2015-08-20

申请号：US14625944

申请日：2015-02-19

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA ,  Kenichi Harada

IPC: F21V8/00 ,  G02F1/1335

CPC classification number: G02B6/0036 ,  G02B6/0055 ,  G02B6/0058

Abstract: An optical waveguide sheet for use in an edge-lit backlight unit is provided, that allows rays of light to enter the end face and emits the rays of light from the front face substantially uniformly. The optical waveguide sheet includes on the back side thereof: a sticking preventive means; and a plurality of recessed portions falling toward the front face side. The sticking preventive means: a plurality of annular raised portions each provided around each of the plurality of recessed portions and projecting toward the back face side; and a plurality of protruding portions provided scatteredly in a region which does not include the annular raised portions. The optical waveguide sheet is preferably for use as a light guide film having an average thickness of no less than 100 μm and no greater than 600 μm.

Abstract translation: 提供了一种用于边缘照明背光单元的光波导片，其允许光线进入端面并基本上均匀地从前面发射光线。 光波导片的背面包括防粘装置， 以及朝向前面侧落下的多个凹部。 防粘附装置：多个环形凸起部，分别设置在多个凹部中的每一个周围并朝向背面侧突出; 以及多个突出部分，其散布地设置在不包括环形凸起部分的区域中。 光波导片优选用作平均厚度不小于100μm且不大于600μm的导光膜。

公开(公告)号：US20140092627A1

公开(公告)日：2014-04-03

申请号：US14039458

申请日：2013-09-27

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA ,  Akira FURUTA

IPC: F21V8/00

CPC classification number: G02B6/0055 ,  G02B6/0043 ,  G02B6/0065

Abstract: The optical waveguide sheet of the present invention is for use in an edge-lit backlight unit of a liquid crystal display unit of laptop computers having a housing thickness of no greater than 21 mm, and includes: an optical waveguide layer containing a polycarbonate-based resin as a principal component; and a hard coat layer laminated on the back face side of the optical waveguide layer, an average thickness of the optical waveguide sheet being no greater than 600 μm. An average thickness of the hard coat layer is preferably from 2 μm to 20 μm. The optical waveguide sheet preferably further includes a lower refractive index layer that is laminated on the back face of the optical waveguide layer and has a refractive index lower than that of the optical waveguide layer, and the hard coat layer is preferably laminated on the back face of the lower refractive index layer.

Abstract translation: 本发明的光波导片用于具有不大于21mm的壳体厚度的膝上型计算机的液晶显示单元的边缘照明背光单元，并且包括：包含聚碳酸酯基的光波导层 树脂为主要成分; 以及层叠在光波导层的背面侧的硬涂层，光波导片的平均厚度不大于600μm。 硬涂层的平均厚度优选为2μm〜20μm。 光波导片优选还包括层叠在光波导层的背面上的折射率低于光波导层的折射率的低折射率层，并且硬涂层优选层叠在背面上 的低折射率层。

公开(公告)号：US20140293190A1

公开(公告)日：2014-10-02

申请号：US14227406

申请日：2014-03-27

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA

IPC: F21V8/00 ,  B29D11/00 ,  B29C47/06

CPC classification number: G02B6/0035 ,  B29C47/0021 ,  B29C47/0064 ,  B29C47/065 ,  B29C47/14 ,  B29C47/56 ,  B29C47/8845 ,  B29C47/886 ,  B29D11/00663 ,  G02B1/045 ,  G02B6/0043 ,  G02B6/0055 ,  G02B6/0065 ,  G02B6/0093 ,  G02F1/133524 ,  G02F1/133615 ,  G02F2001/133607

Abstract: The present invention relates to a light guide film for a backlight unit of an ultrathin liquid crystal display device, the light guide film allowing rays of light entering from an end face to exit from a front face side, and including a hard layer (17, 18) having a pencil hardness of at least HB, the hard layer (17, 18) containing a polycarbonate as a principal component, and at least one face of the hard layer being exposed, and the entire light guide film (12) having an average thickness of no less than 100 μm and no greater than 600 μm.

Abstract translation: 本发明涉及一种用于超薄液晶显示装置的背光单元的导光膜，该导光膜允许从端面进入的光线从正面侧退出，并且包括硬层（17， 18），具有至少HB的铅笔硬度，所述硬质层（17,18）包含聚碳酸酯作为主要成分，并且所述硬质层的至少一个表面被暴露，并且整个导光膜（12）具有 平均厚度不小于100μm且不大于600μm。

公开(公告)号：US20140092626A1

公开(公告)日：2014-04-03

申请号：US14039375

申请日：2013-09-27

Applicant: KEIWA INC.

Inventor： Hironori NAKASHIMA ,  Akira FURUTA

IPC: F21V8/00

CPC classification number: G02B6/0055 ,  G02B6/0093

Abstract: The optical waveguide sheet of the present invention is an optical waveguide sheet for use in an edge-lit backlight unit of a liquid crystal display unit of laptop computers having a housing thickness of no greater than 21 mm, and includes an optical waveguide layer containing a polycarbonate-based resin as a principal component; and a protective layer laminated on the back face of the optical waveguide layer, the protective layer containing an acrylic resin as a principal component, wherein an average thickness of the optical waveguide sheet is no lower than 250 μm and no greater than 600 μm. An average thickness of the protective layer is preferably no less than 10 μm and no greater than 100 μm, and a relative refractive index of the protective layer with respect to the optical waveguide layer is preferably no greater than 0.95.

Abstract translation: 本发明的光波导片是用于具有不大于21mm的壳体厚度的膝上型计算机的液晶显示单元的边缘照明背光单元中的光波导片，并且包括含有 聚碳酸酯类树脂为主要成分; 以及层叠在光波导层的背面上的保护层，保护层含有丙烯酸树脂作为主要成分，其中光波导片的平均厚度不低于250μm且不大于600μm。 保护层的平均厚度优选为10μm以上且100μm以下，保护层相对于光波导层的相对折射率优选为0.95以下。