Title:
LASER PROJECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/228755
Kind Code:
A1
Abstract:
A projection imaging apparatus, which relates to the technical field of imaging. The projection imaging apparatus comprises a light valve and a projection lens. The projection lens comprises a planar mirror group, a refractive lens group, and a curved mirror group. The planar mirror group comprises at least one mirror, and the planar mirror group is disposed between a portion of lenses of the refractive lens group and the curved mirror group. An image beam emitted by the light valve is transmitted through at least a portion of lenses of the refractive lens group, is then incident to the planar mirror group, is reflected at least once by the planar mirror group, and is then incident to the curved mirror group. The curved mirror group is used to reflect and image the image beam onto a screen. The projection imaging apparatus reflects light emitted by a light source by means of the mirrors and then changes the light path, and the optical axes of two mirror groups are not located on the same straight line, which reduces the length of the projection lens and solves the problem in the prior art of the length of projection devices being relatively long, thereby achieving the effect of reducing the length of the projection devices.
Inventors:
LI XIAOPING (CN)
ZHONG QIANG (CN)
YIN LIANG (CN)
ZHONG QIANG (CN)
YIN LIANG (CN)
Application Number:
PCT/CN2020/090129
Publication Date:
November 19, 2020
Filing Date:
May 14, 2020
Export Citation:
Assignee:
HISENSE LASER DISPLAY CO LTD (CN)
International Classes:
G03B21/28; G02B26/08
Foreign References:
| CN1637464A | 2005-07-13 | |||
| CN207396833U | 2018-05-22 | |||
| CN108153090A | 2018-06-12 | |||
| CN106054359A | 2016-10-26 | |||
| US20060023191A1 | 2006-02-02 | |||
| JP2010244017A | 2010-10-28 |
Attorney, Agent or Firm:
QINGDAO LAWSCI INTELLECTUAL PROPERTY CO., LTD. (CN)
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