Laser marking method using laser heated liquid crystal mask
US5734145A · kind A · utility
3Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Aug 7, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/066
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of driving a liquid crystal mask marker increases a marking speed, by reducing the time required for producing an image, and maintains marking accuracy at a high level. For this purpose, a laser beam (L11) is irradiated onto a non-light-permeable portion, such as a non-light-permeable surface and/or a non-liquid-crystal surface, of a liquid crystal mask (8), for example, a liquid crystal electrode member (81), before the liquid crystal mask completes the production of an image when the image is produced on the liquid crystal mask (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.