Title:
WATERMARK PAPER
Document Type and Number:
Japanese Patent JP2017001354
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a watermark paper enabling arbitrarily changing the display of a watermark pattern and recorded optical image information even during observation from the same field of view.SOLUTION: A watermark paper which has a lighting control element part in which a light penetration amount is changed by a voltage state, and is obtained by including an intermediate layer of a thickness of 6 μm-300 μm into a paper layer includes in the intermediate layer or the paper surface, an electric power supply part which supplies electric power to the lighting control element part. The watermark paper changes a watermark image by switching the lighting control element part to a transparent state and a mirror surface state by controlling a voltage with electric power supplied from the electric power supply part.SELECTED DRAWING: Figure 1
Inventors:
IDE HIDEYOSHI
Application Number:
JP2015120500A
Publication Date:
January 05, 2017
Filing Date:
June 15, 2015
Export Citation:
Assignee:
TOPPAN PRINTING CO LTD
International Classes:
B42D25/333; B41M3/14; B42D25/328; B42D25/36; D21H21/40; G02B5/18; G02F1/15
Domestic Patent References:
| JP2010524070A | 2010-07-15 | |||
| JP2009541881A | 2009-11-26 | |||
| JP2004102840A | 2004-04-02 | |||
| JP2013104141A | 2013-05-30 | |||
| JP2008513861A | 2008-05-01 | |||
| JP2013186183A | 2013-09-19 | |||
| JP2014021452A | 2014-02-03 |
Foreign References:
| CN102630323A | 2012-08-08 | |||
| EP1936603A1 | 2008-06-25 | |||
| US20130147179A1 | 2013-06-13 | |||
| WO2016117336A1 | 2016-07-28 |
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office
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