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Projection lens, focusing method and device for projection lens, and projector

A technology of projection lens and projector, which is applied in the field of projection, can solve the problems of complex focusing process and many lenses, and achieve the effect of simplifying the focusing process

Active Publication Date: 2022-06-03
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a large number of lenses that the drive component needs to control during the focusing process, and the movement of the focusing lenses that are set at intervals needs to be controlled, resulting in a more complicated focusing process

Method used

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  • Projection lens, focusing method and device for projection lens, and projector
  • Projection lens, focusing method and device for projection lens, and projector
  • Projection lens, focusing method and device for projection lens, and projector

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Embodiment Construction

[0096] Wherein, the light valve 10 is used to generate an image beam when illuminated. For example, the light valve 10 may be a digital micromirror

[0101] In this embodiment of the present invention, the projector 1 may be a projector capable of focusing (also called a focusing projector),

[0107] Optionally, the second lens group 302 may include 3 lenses. For example, as shown in FIG. 2 , the second mirror group 302 may

[0111] Optionally, the first lens group 301 may include m lenses, where m is a positive integer, and 6≤m<16. Illustratively, the first

[0112] When the first lens group 301 includes 11 lenses, the first lens group 301 may include 2 aspherical lenses and 9 lenses

[0113] FIG. 2 shows a case where the first lens group 301 includes 11 lenses, when the first lens group 301 includes 6 lenses,

[0114] When the first lens group 301 includes 7 lenses, the first lens group 301 may include 2 aspherical lenses and 5 lenses

[0115] As shown in FIG. 2 , the above-men...

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Abstract

The invention discloses a projection lens, a focusing method and device for the projection lens, and a projector, belonging to the field of projection. The projection lens includes: a first mirror group, a second mirror group and a third mirror group arranged in sequence and having a common optical axis, the second mirror group includes n lenses, 1≤n≤5; the n lenses are configured as It is connected with the driving assembly in the projector where it is located, and moves along the optical axis of the second mirror group under the control of the driving assembly to change the image distance of the projection lens. The invention can simplify the focusing process of the projection lens. The invention is used for focusing of projection lens.

Description

Projection lens, focusing method and device for projection lens, projector technical field The present invention relates to projection field, particularly a kind of projection lens, the focusing method and device of projection lens, projection instrument. Background technique [0002] Laser display projection technology is a new type of display projection technology currently on the market. Exciting applications of this technology The light projector can realize the function of automatic focusing, and the laser projector that can realize the automatic focusing function is also called the automatic focusing projector. projector. The focusing refers to adjusting the image distance of the projector by adjusting the position of the focal point of the projector. [0003] The focusing projector includes a drive assembly and a projection lens, and the projection lens includes a focusing lens group for focusing. when cast When the projection lens projects to the screen, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/10G02B15/14G03B21/14
CPCG02B7/10G02B15/14G03B21/142
Inventor 杜玉楠罗超阴亮
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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