High temperature shut-off for an LCD heater
US6891135B2 · kind B2 · utility
123Cited by
17References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Jan 8, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/36
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A main heater controller is adapted to control operation of the LCD heater. A temperature controlled override switch is adapted to disable the LCD heater, independent of the main heater controller, upon a temperature reaching a shut-off temperature above a normal operating temperature of the LCD. The temperature controlled switch has a current flow path made of a material whose conductivity is a function of temperature. A cavity in which the temperature controlled switch is located is also provided. The cavity is adapted to transfer heat in air emanating from the LCD heater to the temperature controlled switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.