公开(公告)号：EP2977935B1

公开(公告)日：2019-05-22

申请号：EP14769655.3

申请日：2014-03-12

Applicant: NHK Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SHIBUYA, Seiya ,  IDA, Tohru

IPC: G06K19/10 ,  G06K19/06 ,  B42D25/364 ,  B42D25/382 ,  G06K7/12 ,  G06K17/00 ,  G02B5/30 ,  G02B5/32 ,  G06K19/16 ,  G07D7/00 ,  B42D25/328 ,  B41M3/14

公开(公告)号：EP2590032B8

公开(公告)日：2018-04-18

申请号：EP11800903.4

申请日：2011-06-29

Applicant: NHK Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SAKAUCHI, Tokio ,  IDA, Tohru

IPC: B42D25/328 ,  B42D25/364 ,  G02B5/30 ,  B32B38/00 ,  G03H1/00 ,  G03H1/02 ,  G02B27/28 ,  G06K7/10 ,  G06K19/06 ,  G03H1/22 ,  B42D25/00

CPC classification number: B42D25/328 ,  B32B38/145 ,  B42D25/364 ,  G02B5/3016 ,  G02B5/3041 ,  G02B27/286 ,  G03H1/0011 ,  G03H1/02 ,  G03H1/0252 ,  G03H1/0256 ,  G03H2001/2276 ,  G03H2250/38 ,  G03H2250/40 ,  G03H2250/41 ,  G06K7/10 ,  G06K19/06065

Abstract: A method for production of the identification medium is provided, in which a counterfeit product having similar appearance as that of an authentic one can be easily detected and in which the code can be read with high accuracy. The method for production of an identification medium, contains a forming step in which a code printed pattern 107 is formed by printing; and a joining step in which the code printed pattern 107 and a cholesteric liquid crystal layer 102 are joined; wherein the identification medium comprises, in order, seen from an observing side: a cholesteric liquid crystal layer 102, in which a hologram is processed and right circularly polarized light is reflected; a circularly polarizing filter layer 106 having a structure formed by laminating a »/4 plate and a linearly polarizing filter from the observing side, in which left circularly polarized light selectively penetrates toward the cholesteric liquid crystal layer 102 when natural light enters from the opposite side to the cholesteric liquid crystal layer side 102; and a code printed pattern 107, in which a two-dimensional codes is formed.

公开(公告)号：EP1028359A1

公开(公告)日：2000-08-16

申请号：EP99940526.9

申请日：1999-08-27

Applicant: Nippon Mitsubishi Oil Corporation ,  NHK Spring Co., Ltd. ,  DAI NIPPON PRINTING CO., LTD.

Inventor： SHIOZAWA, Akihito, Central Techn. Res. Lab. ,  SUZUKI, Shinichiro, Central Techn. Res. Lab ,  NISHIMURA, Suzushi, Central Techn. Res. Lab. ,  HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SAKAKIBARA, Mikihiko, Dai Nippon Printing Co. Ltd ,  YOKOYAMA, Masumi

IPC: G03H1/18

CPC classification number: B42D25/328 ,  B42D25/364 ,  B42D2033/26 ,  G03H1/0011 ,  G03H1/02 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2001/2244 ,  G03H2001/2276 ,  G03H2222/31 ,  G03H2250/10 ,  G03H2250/33 ,  G03H2250/34 ,  G03H2250/38 ,  G03H2250/40 ,  G03H2250/41 ,  G07D7/0032

Abstract: An authenticity identifying film (10) has a reflective film (11) having a circularly polarized light selectivity to reflect at least only either of right-handed circularly polarized light and left-handed circularly polarized light of incident light to produce reflected light. The reflective film (11) is provided with a hologram forming part (11a). The hologram forming part (11a) reflects circularly polarized light of the same circular polarization as that of the reflected light in a direction different from that of the reflected light to form a holographic image. The reflected light reflected by the reflective film (11) and the holographic image formed by the hologram forming part (11a) are detected by detectors disposed at different positions, respectively.

公开(公告)号：EP2905767A1

公开(公告)日：2015-08-12

申请号：EP13843570.6

申请日：2013-10-02

Applicant: Nhk Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SAKAUCHI, Tokio ,  IDA, Tooru ,  SUZUKI, Shinei

IPC: G09F3/03 ,  B42D25/328 ,  B42D25/364 ,  G02B5/30 ,  G09F3/02

CPC classification number: B42D25/47 ,  B42D25/00 ,  B42D25/29 ,  B42D25/328 ,  B42D25/351 ,  B42D25/364 ,  G02B5/32 ,  G03H1/0011 ,  G03H1/0256 ,  G09F3/0291 ,  G09F3/0292 ,  G09F3/0294 ,  G09F3/03 ,  G09F3/0376

Abstract: An identification medium can be used in an opening label, can clearly show signs of it having been opened, and can also have a superior authenticity-confirming function. The identification medium has a structure including, in the following order as seen from the side of observation: an optical function layer that generates a color shift, a separation layer that is partially formed, a printed layer, and an adhesive layer, in which when an adhesive strength between the adhesive layer and an adherend is set to be Xa, an adhesive strength between the adhesive layer and the printed layer is set to be Xb, and an adhesive strength at a portion in which the separation layer is laminated between the optical function layer and the printed layer is set to be Xc, the adhesive strength of each part is set to satisfy Xa > Xb > Xc or Xb > Xa > Xc.

公开(公告)号：EP1833034B1

公开(公告)日：2015-06-03

申请号：EP05819863.1

申请日：2005-12-21

Applicant: NHK Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SAKAUCHI, Tokio

IPC: B42D25/328 ,  B42D25/391 ,  B42D25/364

CPC classification number: B42D25/328 ,  B42D25/29 ,  B42D25/391 ,  B42D25/45 ,  B42D2033/20 ,  B42D2033/26 ,  B42D2035/24 ,  G03H1/00 ,  G03H1/0011 ,  G03H1/02 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2250/14 ,  G03H2250/38 ,  G03H2250/40 ,  G03H2250/41 ,  G07D7/12 ,  G09F3/0292

公开(公告)号：EP2006750B1

公开(公告)日：2014-08-20

申请号：EP07740729.4

申请日：2007-03-30

Applicant: NHK SPRING CO., LTD. ,  NIPPON OIL CORPORATION

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  NISHIMURA, Suzushi ,  SUZAKI, Gorou

IPC: G03H1/18 ,  G02B5/30 ,  G03H1/02 ,  B42D15/00 ,  G07D7/12 ,  G07D7/20 ,  G03H1/00

CPC classification number: B42D25/364 ,  B42D25/29 ,  B42D25/328 ,  B42D25/391 ,  B42D2033/26 ,  G02B5/30 ,  G02B5/3016 ,  G03H1/02 ,  G03H1/0244 ,  G03H1/0256 ,  G03H1/0272 ,  G03H2001/0016 ,  G03H2250/38 ,  G03H2250/41 ,  G07D7/128 ,  G07D7/207

公开(公告)号：EP2506065A1

公开(公告)日：2012-10-03

申请号：EP10833089.5

申请日：2010-11-12

Applicant: Nhk Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SAKAUCHI, Tokio ,  SHIBUYA, Seiya ,  IDA, Tohru

IPC: G02F1/13 ,  B42D15/10 ,  G02F1/13363

CPC classification number: B42D25/364 ,  B42D25/29 ,  B42D25/328 ,  B42D25/391 ,  B42D2033/10 ,  B42D2033/26 ,  B42D2035/24 ,  G02B5/3016 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2250/14 ,  G03H2250/36 ,  G03H2250/38

Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter.
A cholesteric liquid crystal layer 102 is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer 106 having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A formed by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer 106. When the identification medium 100 is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium 100 is observed via a circular polarization filter, the image A can be seen to have a specific color by the influence of the optical anisotropy.

公开(公告)号：EP2056134A1

公开(公告)日：2009-05-06

申请号：EP07792303.5

申请日：2007-08-09

Applicant: NHK SPRING CO., LTD.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  NASUBIDA, Shinya

IPC: G02B5/30 ,  B41M3/14 ,  B42D15/10 ,  G09F3/02

CPC classification number: B42D25/364 ,  B41M3/14 ,  B41M3/148 ,  B42D25/324 ,  B42D25/328 ,  B42D2033/26 ,  G02B5/3016 ,  Y10T428/10

Abstract: An identifying medium comprises a nematic liquid crystal layer for forming a latent image with gradation, and the nematic liquid crystal layer has a thickness distribution corresponding to the gradation.

公开(公告)号：EP2687879B1

公开(公告)日：2017-08-30

申请号：EP12760512.9

申请日：2012-03-08

Applicant: NHK Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SHIBUYA, Seiya ,  IDA, Tooru

IPC: G02B5/30 ,  B42D15/00 ,  G09F3/02 ,  G09F3/03 ,  B42D25/00

CPC classification number: B42D25/47 ,  B42D25/00 ,  B42D25/29 ,  B42D25/328 ,  B42D25/364 ,  B42D25/391 ,  B42D2035/26 ,  G02F1/13342 ,  G02F1/133553 ,  G09F3/0294 ,  G09F3/0341

Abstract: In an identification medium, switching of images can be clearly observed, and the medium has a structure produced at low cost. The structure comprises a cholesteric liquid crystal layer 102 in which a hologram is formed, and which selectively reflects circularly polarized light of a specific rotating direction of a specific central wavelength, a cholesteric liquid crystal layer reflecting the entire range of visible light 105 which has reflection characteristics equivalent to a case of reflecting the entire range of visible light and which reflects circularly polarized light of the same rotating direction as the circularly polarized light reflected from the cholesteric liquid crystal layer 102, and a display pattern 106 having a specific content displayed, arranged in this order, as seen from the side of observation.

公开(公告)号：EP2977935A1

公开(公告)日：2016-01-27

申请号：EP14769655.3

申请日：2014-03-12

Applicant: Nhk Spring Co., Ltd.

Inventor： HOSHINO, Hidekazu ,  TAKEUCHI, Itsuo ,  SHIBUYA, Seiya ,  IDA, Tohru

IPC: G06K19/10 ,  G06K19/06 ,  B42D25/364 ,  B42D25/382 ,  G06K7/12 ,  G06K17/00 ,  G02B5/30 ,  G02B5/32

CPC classification number: B42D25/364 ,  B41M3/14 ,  B42D25/328 ,  B42D25/382 ,  G02B5/30 ,  G06K7/12 ,  G06K17/00 ,  G06K19/06 ,  G06K19/10 ,  G06K19/16 ,  G07D7/00

Abstract: An identification medium can be used to determine whether or not a code is authentic when a structure displaying the code is visually observed, and which can also be superior in cost, reliability and durability. The identification medium has a structure including a cholesteric liquid crystal layer 103 which selectively reflects circularly polarized light of a first wavelength in a visible light band, and in which a processed hologram 104 is formed, and a code printed layer 102 in which code information is printed by an ink that absorbs or reflects infrared rays at a wavelength that is different from the first wavelength, in which a region in which the processed hologram 104 is formed and a region 102a in which the ink is printed on the code printed layer 102, are located so as to be at least partially overlapped when they are viewed from the side of observation.

Abstract translation: 当可视地观察显示代码的结构时，可以使用识别介质来确定代码是否可信，并且还可以在成本，可靠性和耐久性方面更好。 识别介质具有包括胆甾型液晶层103的结构，该胆甾醇型液晶层103选择性地反射可见光波段中的第一波长的圆偏振光，并且其中形成经处理的全息图104;以及代码信息为 通过墨水印刷，其中以与形成有经处理的全息图104的区域不同的第一波长的波长吸收或反射红外线，以及在代码印刷层102上印刷墨水的区域102a， 位于从观察侧观察时至少部分重叠。