COMPOSITE FILM FOR PREVENTING FORGERY, AND COMPOSITE METHOD FOR PREVENTING FORGERY

Title:

COMPOSITE FILM FOR PREVENTING FORGERY, AND COMPOSITE METHOD FOR PREVENTING FORGERY

Document Type and Number:

WIPO Patent Application WO/2012/018209

Kind Code:

A2

Abstract:

According to one embodiment of the present invention, a composite film comprising a display region for preventing forgery is provided. The display region comprises a magnetic solution distributed in a curing medium. The magnetic solution is a colloidal solution in which a plurality of magnetic particles charged in the same polarity are dispersed in fluid, and an expressive material is present in the curing medium and is separate from the magnetic solution, wherein at least one of reflectivity and transmittance of the expressive material changes when a magnetic field is applied and a predetermined characteristic of the expressive material is expressed when a specific energy is applied.

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Inventors:

JOO JAE-HYUN (KR)
HONG SUNG-WAN (KR)

Application Number:

PCT/KR2011/005648

Publication Date:

February 09, 2012

Filing Date:

August 01, 2011

Export Citation:

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Assignee:

NANOBRICK CO LTD (KR)
JOO JAE-HYUN (KR)
HONG SUNG-WAN (KR)

International Classes:

G02B5/20; G02F1/1335

Foreign References:

JPH07146659A	1995-06-06
JPH0971042A	1997-03-18
KR20070031309A	2007-03-19
KR19980059988A

Attorney, Agent or Firm:

KIM, HAN (KR)
김한 (KR)

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