Projection device with automatic focusing function and automatic focusing method thereof
A technology for auto-focusing and projection devices, applied in projection devices, installations, optics, etc., can solve problems such as inability to auto-focus, inability to detect clear images, etc.
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[0016] The present invention will be described in detail below with preferred embodiments of the present invention and accompanying drawings.
[0017] first, figure 1 It is a flow chart of the method of the present invention, and the automatic focusing method of the projection device of a preferred embodiment of the present invention is described as follows in conjunction with the flow chart:
[0018] In this embodiment, the first imaging lens is used to project the image light source onto the screen to form an image.
[0019] The image on the screen is imaged to the image sensing unit by using the second imaging lens. Wherein, the image sensing unit is used to sense an optical image and convert it into an electrical signal for subsequent calculation and processing. The image processing unit may be, but not limited to: Charge-coupled Device (CCD), Complementary Metal-Oxide-Semiconductor (Complementary Metal-Oxide-Semiconductor, CMOS) and the like.
[0020] Bring this second...
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