Method and device for adjusting focal length of projector

A focus adjustment and projector technology, which is applied in the field of projectors, can solve problems such as slow focusing speed, and achieve the effect of improving the speed of focusing and ensuring accuracy

Active Publication Date: 2021-11-16
VISIONVERA INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The image focusing method needs to repeatedly adjust the focal length of the projector back and forth, and the focusing speed is slow

Method used

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  • Method and device for adjusting focal length of projector
  • Method and device for adjusting focal length of projector
  • Method and device for adjusting focal length of projector

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Embodiment Construction

[0093] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0094] refer to figure 1 , which shows a flow chart of the steps of a method for adjusting the focal length of a projector according to an embodiment of the present invention, which may specifically include the following steps:

[0095] Step 101, call at least two distance sensors to measure at least two distances between the projector and the screen.

[0096] In a specific implementation, according to the purpose classification, the projector can include education projector, business projector, home projector, children's early education projector, mobile phone projector, advertising projector, etc., according to the technology classification, the projector can include CRT (Cathode Ray Tube, liquid crystal cathode ray tube) proje...

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Abstract

An embodiment of the present invention provides a method and device for adjusting the focus of a projector. The method includes: calling at least two distance sensors to measure at least two distances between the projector and the screen; Determine the projection area where the projector is located; if the projection area is within the legal projection area, then adjust the projector so that the projection lens is perpendicular to the screen according to the at least two distances; if the adjustment is completed , then determine the projection focal length of the projection lens according to the at least two distances; adjust the projection lens in the projector according to the projection focal length. By adjusting the projection area, adjusting the vertical position, and adjusting the projection focal length, the adjustment process is from coarse to fine, and the adaptive adjustment of the projection focal length is gradually realized, which not only ensures the accuracy of the projection focal length, but also avoids repeatedly adjusting the focal length of the projector to improve the speed of focusing.

Description

technical field [0001] The invention relates to the technical field of projectors, in particular to a method and device for adjusting the focal length of a projector. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen, and the images or videos projected onto the screen will be magnified several times or dozens of times while maintaining clarity, which is convenient People watch and give people a broad vision, so it is widely used in teaching, business, media advertising, home entertainment and other fields. [0003] During use, if the projector or the screen is moved, the image or video projected on the screen is likely to be blurred. At this time, the projector needs to be adjusted to ensure that the image or video projected on the screen is clear. [0004] At present, focusing on the projector is mainly based on the image focusing method, that is, when the projector is projecting images or vide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31
CPCH04N9/317H04N9/3185
Inventor 彭宇龙韩杰王艳辉彭郑君
Owner VISIONVERA INFORMATION TECH CO LTD
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