Projection device and automatic focusing method

A technology of projection equipment and projection surface, applied in the field of projection display, can solve problems such as complicated operation, and achieve the effect of simplifying the adjustment process
CN102354079AActive Publication Date: 2012-02-15HISENSE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HISENSE
Publication Date
2012-02-15

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Abstract

The invention discloses a projection device and an automatic focusing method, and belongs to the technical field of projection display. The projection device is designed for solving the problem that the focal distance of a projection lens group needs to be adjusted by a user manually in the prior art. The projection device comprises a processing unit, a projection unit, a projection lens group and a projection lens driving unit. The processing unit is respectively connected with the projection unit and the projection lens driving unit; the projection device further comprises an image acquiring unit which is connected with the processing unit; and at least three laser emitters are arranged around the image acquiring unit.
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Description

technical field

[0001] The invention relates to the technical field of projection display, in particular to an automatic focusing projection device and an automatic focusing method. Background technique

[0002] When teaching in schools, giving speeches at conferences, displaying materials in companies, and watching high-quality movies at home, projection equipment will be used, which gradually expands the scope of use of projection equipment. When using a projection device, in order to make the projection device project and display a clear image on the screen, the focal length of the projection device needs to be adjusted.

[0003] In the prior art, when adjusting the focal length of the projection equipment, manual methods are often used, that is, after the image to be played is projected onto the screen, the clarity of the image on the screen is judged by human eyes, and the adjustment is made according to the judgment. The focal length of the projection equipment, and t...

Claims

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