Title:
PROJECTION APPARATUS AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/052255
Kind Code:
A1
Abstract:
Disclosed are a projection apparatus and a control method therefor. The projection apparatus comprises a base (10), a housing (11), a second driving apparatus (14) and a projection assembly (12). The base (10) is arranged on a mounting face, and the base (10) is provided with a first driving apparatus (13). The housing (11) is in transmission connection with the base (10) by means of the first driving apparatus (13), and the housing (11) is rotated, under the drive of the first driving apparatus (13), taking a first rotation shaft perpendicular to the mounting face as the centre of rotation. The second driving apparatus (14) is fixed to the housing. The projection assembly (12) is accommodated in the housing, the projection assembly (12) is rotated, under the drive of the second driving apparatus (14), taking a second rotation shaft as the centre of rotation, with the second rotation shaft being perpendicular to the first rotation shaft. The projection assembly (12) comprises a light machine (121), a lens (122) connected to the light machine (121), an angle measurement element (123) and a distance measurement element (124), wherein the detection directions of the angle measurement element (123) and the distance measurement element (124) are parallel to the optical axis of the lens (122). By means of the projection apparatus and the control method, the optimal projection direction of a lens can be found automatically, and the lens can be adjusted to the optimal projection direction quickly and accurately.
Inventors:
CHENG WENBO (CN)
YI QI (CN)
DAI PINGAN (CN)
LI YI (CN)
YI QI (CN)
DAI PINGAN (CN)
LI YI (CN)
Application Number:
PCT/CN2019/086930
Publication Date:
March 19, 2020
Filing Date:
May 15, 2019
Export Citation:
Assignee:
APPOTRONICS CORP LTD (CN)
International Classes:
G03B21/14
Foreign References:
| CN206743456U | 2017-12-12 | |||
| CN104898354A | 2015-09-09 | |||
| CN102307288A | 2012-01-04 | |||
| CN107065409A | 2017-08-18 | |||
| CN207281459U | 2018-04-27 | |||
| US20040119951A1 | 2004-06-24 |
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