Apparatus and method for forming serration pattern
US9770875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2014 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Oct 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0068
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for forming a serration pattern on a light guide plate having a top surface emitting a light, a bottom surface opposite to the top surface, and at least one side surface, arranged between the top surface and the bottom surface, as an incident surface. The apparatus includes a base plate supporting the bottom surface of the light guide plate; a fixing plate facing the top surface of the light guide plate with a predetermined interval; and a serration core transferring the serration pattern onto the at least one side surface of the light guide plate by a thermal pressing process causing a thickness deformation of the light guide plate. Further, the fixing plate induces a changed thickness of the light guide plate to be uniform by limiting a thickness change amount of the light guide plate to the predetermined interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.