Display device with visually-distinguishable watermark area and non-watermark area
US10831052B2 · kind B2 · utility
0Cited by
61References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Jul 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1681
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is directed to display devices comprising a watermark area and a non-watermark area. The display cells in the watermark area have widths of the partition walls, heights of the partition walls, top opening shapes or display cell sizes which are different from those of the display cells in the non-watermark area. The watermark aims to protect against counterfeiting or to be used for decoration purposes. The watermark is visible at certain viewing angles and/or under certain lighting conditions and it does not interfere with displaying of the regular images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.