View angle control sheet and method for producing the same
US6239911A · kind A · utility
9Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/8905
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A view angle control sheet comprising a non-oriented light permeable polymer layer having cracks of regular directionality is disclosed. The view angle control sheet of the present invention has good view angle control property and can easily be obtained at low cost. The sheet having good view angle control property with respect to two or more directions can also easily be obtained as required at low cost. The view angle control sheet of the present invention can be used in office equipment displays, automobile meters, outdoor displays, windows and the like to desirably control view angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.