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Automatic focusing projection method and system

An auto-focus and projection system technology, applied in the direction of using projection device image reproducer, color TV parts, electrical components, etc., can solve the lack of real-time auto-focus solutions and other problems

Active Publication Date: 2021-05-18
IVIEW DISPLAY SHENZHEN CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the reflective dynamic projection (that is, the movement of the projected picture is controlled by the rotation of the mirror) system, there is still a lack of effective real-time auto-focus solutions

Method used

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  • Automatic focusing projection method and system
  • Automatic focusing projection method and system
  • Automatic focusing projection method and system

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of this application. The terms used in the description of the present application are only for the purpose of ...

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Abstract

The embodiment of the invention relates to the technical field of digital projection display, in particular to an automatic focusing projection method and system. The embodiment of the invention provides an automatic focusing projection method, which is used for an automatic focusing projection system; the automatic focusing projection system comprises a distance measuring unit, a projection unit and a reflection unit. The automatic focusing projection method comprises the following steps: acquiring a depth image of the distance measuring unit, obtaining a vertical projection distance from the distance measuring unit to a projection plane according to the depth image; obtaining position information of a central point of a projection picture in the depth image according to the elevation angle of the reflection unit and the vertical projection distance; obtaining a projection distance between the projection unit and the projection picture according to the position information; and focusing the projection unit according to the projection distance. By means the method, real-time automatic focusing can be realized in the reflective dynamic projection system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of digital projection display, and in particular to an auto-focus projection method and system. Background technique [0002] In recent years, with the rapid development of semiconductor display technology, projection technology has developed rapidly, and many projection devices have appeared on the market. At present, a variety of application scenarios need to use dynamic projection technology, such as large-scale stages, security alarms, smart transportation, etc., to meet the specific needs of different scenarios by moving the projection screen in space. In a dynamic projection system, a very important issue is real-time autofocus. Since the projection position of the dynamic projection system will change constantly, the projection distance will also change constantly. If a fixed-focus solution is adopted, the projected picture will inevitably appear blurred. Therefore, in a dynami...

Claims

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Application Information

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IPC IPC(8): H04N9/31
CPCH04N9/3141H04N9/317
Inventor 李文祥丁明内杨伟樑高志强
Owner IVIEW DISPLAY SHENZHEN CO LTD
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