Projection apparatus and heat dissipation control method thereof
US10859898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2020 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Apr 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection apparatus and a heat dissipation control method thereof are provided. The projection apparatus includes a light valve module, a light source, a brightness sensor, a cooling element, a first temperature sensor, a second temperature sensor and a controller. The controller determines a specified temperature of the cooling element according to the brightness of an illumination beam provided by the light source, and calculates a dew point temperature according to the ambient temperature. The controller adjusts the operating power of the cooling element according to the dew point temperature, the specified temperature and the cold end temperature of the cold end surface of the cooling element. The operating power of the cooling element is flexibly adjusted based on the brightness provided by the light source to avoid a dew formation phenomenon on the cooling element and the light valve module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.