HMI display covers having low birefringence
US12392936B2 · kind B2 · utility
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2References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 25, 2020 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Aug 26, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an optically clear protective cover plate for Human Machine Interface (HMI) touch panel displays wherein the cover plate is formed from a thermoplastic polymer comprising a high melt flow polycarbonate. The polycarbonate is characterized by a melt flow rate (MFR), or melt flow index (MFI), of between about 60 and about 80 g/10 min (ASTM D-1238, 300° C./1.2 kg).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.