Automatic focusing system and method for projector

Abstract

The invention provides a projector automatic focusing system and a method thereof. The projector automatic focusing system includes an area selector module, a focal length setting module, a resolution calculation module, a contrast module and a control module, wherein the area selector module is used for selecting at least one analysis area on a projection face, the focal length setting module is used for setting a plurality of focal lengths within a focusing range of a lens, the resolution calculation module is used for computing resolution of the lens respectively at the end of each focal length within the focusing range, the contrast module is used for comparing the resolutions obtained by calculation to obtain the focal length of the end corresponding to the maximum resolution, the selector module is further used for selecting a plurality of sites within the obtained focal length, the resolution calculation module is further used for comparing the resolutions at the selected sites of the lens to obtain a site position corresponding to the maximum resolution, and the control module drives the lens to the position of the obtained site through a control motor. With the projector automatic focusing system and the method thereof, the focusing time can be saved and the focusing accuracy can be increased.

Description

technical field [0001] The invention relates to a projector automatic focus system and method. Background technique [0002] Usually, after turning on the projector, the presenter needs to adjust the focal length and position of the projector to ensure that the projected display screen is normal. For business users who often change the environment where the projector is used, these adjustments are relatively cumbersome. [0003] However, projectors such as existing projectors cannot detect the distance between the projector and the projection plane, and automatically adjust the focal length to ensure that the projection display picture is clear. When the projector is placed at a certain angle from the projection plane, the projected picture will be distorted. In order to ensure the normal display of the picture, the user needs to spend a lot of time adjusting the picture, which reduces the efficiency of projection demonstration. Contents of the invention [0004] In view ...

AI Technical Summary

Problems solved by technology

[0002] Usually, after turning on the projector, the presenter needs to adjust the focal length and position of the projector to ensure that the projected display screen is normal. For business users who often change the use environment of the projector, these adjustments are relatively cumbersome

[0003] However, existing projectors and other projectors cannot detect the distance between the projector and the projection plane, and automatically adjust the focal length to ensure that the projection display is clear

When the projector is placed at a certain angle from the projection plane, the projected picture will be distorted. In order to ensure the normal display of the picture, the user needs to spend a lot of time adjusting the picture, which reduces the efficiency of projection demonstration

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