Projection device

The invention discloses a projection device, which comprises a shell, a light machine, a lens, a first fan, a sensing unit, and a control unit, wherein the lens is arranged in the shell; the lens is provided with a first region; the first region is located at the first end, far away from the light m...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YANG JIAFENG, ZHANG SHUYU, ZHOU BINGZHONG, LI JINKUI, CONG ZHIJIE, SHEN JUNMING
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	The invention discloses a projection device, which comprises a shell, a light machine, a lens, a first fan, a sensing unit, and a control unit, wherein the lens is arranged in the shell; the lens is provided with a first region; the first region is located at the first end, far away from the light machine, of the lens; the first fan is arranged adjacently to the first region of the lens for cooling the first region; the sensing unit is used for sensing the ambient temperature inside the shell; the control unit is used for adjusting the rotation speed of the first fan according to the ambient temperature; when the ambient temperature is larger than the preset value, the control unit improves the rotation speed of the first fan; and when the ambient temperature is smaller than the preset value, the control unit reduces the rotation speed of the first fan. Thus, the problem that the position of an imaging picture shifts due to temperature changes outside the lens in the prior art can be solved.