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EP1431050A3 - Process for laser marking of a liquid crystal film - Google Patents

Process for laser marking of a liquid crystal film Download PDF

Info

Publication number
EP1431050A3
EP1431050A3 EP03026751A EP03026751A EP1431050A3 EP 1431050 A3 EP1431050 A3 EP 1431050A3 EP 03026751 A EP03026751 A EP 03026751A EP 03026751 A EP03026751 A EP 03026751A EP 1431050 A3 EP1431050 A3 EP 1431050A3
Authority
EP
European Patent Office
Prior art keywords
liquid crystal
crystal film
laser marking
optical
relates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03026751A
Other languages
German (de)
French (fr)
Other versions
EP1431050A2 (en
Inventor
Matthias Dr. Kuntz
Reiner Delp
John Patrick
Rodney Dr. Riddle
Robert Dr. Hammond-Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Priority to EP03026751A priority Critical patent/EP1431050A3/en
Publication of EP1431050A2 publication Critical patent/EP1431050A2/en
Publication of EP1431050A3 publication Critical patent/EP1431050A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Polarising Elements (AREA)

Abstract

The invention relates to process for laser marking of a liquid crystal film. The invention further relates to a liquid crystal film obtained by this method and to its use in optical, decorative or security applications, for optical information storage or the preparation of liquid crystal pigments.
EP03026751A 2002-12-19 2003-11-21 Process for laser marking of a liquid crystal film Withdrawn EP1431050A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03026751A EP1431050A3 (en) 2002-12-19 2003-11-21 Process for laser marking of a liquid crystal film

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02028174 2002-12-19
EP02028174 2002-12-19
EP03026751A EP1431050A3 (en) 2002-12-19 2003-11-21 Process for laser marking of a liquid crystal film

Publications (2)

Publication Number Publication Date
EP1431050A2 EP1431050A2 (en) 2004-06-23
EP1431050A3 true EP1431050A3 (en) 2004-11-03

Family

ID=32395436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03026751A Withdrawn EP1431050A3 (en) 2002-12-19 2003-11-21 Process for laser marking of a liquid crystal film

Country Status (1)

Country Link
EP (1) EP1431050A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058805A1 (en) * 1997-06-19 1998-12-30 Merck Patent Gmbh Plastics which can be laser-marked
US6207240B1 (en) * 1998-08-14 2001-03-27 Clariant Gmbh Laser marking of effect coatings
WO2002086609A1 (en) * 2001-04-24 2002-10-31 Merck Patent Gmbh Liquid crystal device exhibiting optical properties which are changeable after assembly
EP1281538A2 (en) * 2001-07-02 2003-02-05 MERCK PATENT GmbH Optically variable marking

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261712A1 (en) 1986-09-04 1988-03-30 Koninklijke Philips Electronics N.V. Picture display cell, method of forming an orientation layer on a substrate of the picture display cell and monomeric compounds for use in the orientation layer
DE69325555D1 (en) 1992-04-27 1999-08-12 Merck Patent Gmbh ELECTROOPTIC LIQUID CRYSTAL SYSTEM
DE4405316A1 (en) 1994-02-19 1995-08-24 Basf Ag New polymerizable liquid crystalline compounds
DE19504224A1 (en) 1994-02-23 1995-08-24 Merck Patent Gmbh Liq. crystalline (LC) material
DE4408171A1 (en) 1994-03-11 1995-09-14 Basf Ag New polymerizable liquid crystalline compounds
DE19781752T1 (en) 1996-07-01 1999-09-02 Merck Patent Gmbh Chiral dopants
DE19834162A1 (en) 1997-08-13 1999-02-18 Merck Patent Gmbh Chiral connections

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058805A1 (en) * 1997-06-19 1998-12-30 Merck Patent Gmbh Plastics which can be laser-marked
US6207240B1 (en) * 1998-08-14 2001-03-27 Clariant Gmbh Laser marking of effect coatings
WO2002086609A1 (en) * 2001-04-24 2002-10-31 Merck Patent Gmbh Liquid crystal device exhibiting optical properties which are changeable after assembly
EP1281538A2 (en) * 2001-07-02 2003-02-05 MERCK PATENT GmbH Optically variable marking

Also Published As

Publication number Publication date
EP1431050A2 (en) 2004-06-23

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