Invention Grant
- Patent Title: Printing of liquid crystal droplet laser resonators on a wet polymer solution and product made therewith
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Application No.: US15266135Application Date: 2016-09-15
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Publication No.: US09720173B2Publication Date: 2017-08-01
- Inventor: Harry Coles , Ian Hutchings , Damian Gardiner , Wen-Kai Hsiao , Philip Hands , Stephen Morris , Timothy Wilkinson
- Applicant: Johnson Matthey PLC
- Applicant Address: GB Cleveland
- Assignee: Johnson Matthey PLC
- Current Assignee: Johnson Matthey PLC
- Current Assignee Address: GB Cleveland
- Agency: Swanson & Bratschun, L.L.C.
- Priority: GB1209235.9 20120525; GB1214439.0 20120813
- Main IPC: G02F1/13
- IPC: G02F1/13 ; C09K19/02 ; G02B6/122 ; H01S3/094 ; H01S3/16 ; B41J2/01 ; G02F1/1341 ; H01S3/08

Abstract:
A method of manufacturing a security feature for identifying objects or documents of value. The method may include the steps of encoding information in a pattern; and ink jet printing a chiral nematic liquid crystal material from a reservoir using a print head on to a substrate in the pattern. Thus, the method forms a patterned array of chiral nematic liquid crystal material deposits. The print head, or the reservoir, or both, may be heated to a temperature above the clearing point of the chiral nematic liquid crystal material. The chiral axes of the chiral nematic liquid crystal material deposits may be aligned substantially perpendicular to the substrate such that a predetermined portion of the electromagnetic spectrum is selectively reflected over other regions of the electromagnetic spectrum by the chiral nematic liquid crystal material deposits.
Public/Granted literature
- US20170059775A1 PRINTING OF LIQUID CRYSTAL DROPLET LASER RESONATORS ON A WET POLYMER SOLUTION AND PRODUCT MADE THEREWITH Public/Granted day:2017-03-02
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