Intrinsically safe mobile device with reduction in sparking risk and surface heating
US10149389B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2016 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Nov 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved intrinsically safe mobile device is designed to reduce sparking risk and surface heating while still maintaining a form factor, processing speed, and functionality comparable to conventional mobile devices. Non-intrinsically safe electronic components are mounted on an unprotected part of a printed circuit board (PCB) contained within the mobile device and are encapsulated to reduce risk of sparking and to minimize surface heating to enable the encapsulated electronic components to be certified as intrinsically safe. The encapsulated electronic components are connected using a trace with intrinsically safe electronic components mounted on a protected part of the PCB and are connected with user interface components using FPC cabling. The trace and FPC cabling are certified as intrinsically safe using one or more protection techniques, such as through use of a resistor, a double MOSFET clamping circuit, a capacitor, a fuse, or maintaining a minimum clearance space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.