Discrimination medium and production method therefor
US8421987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2008 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Mar 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2250/41
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer, having a fine asperity for forming a hologram, is formed on a transparent first substrate. A print layer composed of a black ink is formed on a transparent second substrate. The substrates are affixed to each other via a bond layer, so that a discrimination medium is obtained. In the discrimination medium, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.