Title:
PROJECTION DEVICE AND FOCUSING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/087960
Kind Code:
A1
Abstract:
Some embodiments of the present application provide a projection device and a focusing method. In the focusing method, position memory information can be extracted from a memory after receiving a focusing instruction, and to the credibility of a current position in the position memory information can be determined. If the credibility is a first numerical value, then a first focusing amount is calculated on the basis of the current position; and if the credibility is a second numerical value, then a second focusing amount is calculated on the basis of a starting point position of a focusing interval. A focusing instruction is sent to a driving motor according to the first focusing amount and the second focusing amount, so that the projection device may adjust the position of an optical assembly on the basis of the recorded current position, thus improving the definition of a projected picture, and shortening the time consumed during a focusing process.
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Inventors:
WANG YINGJUN (CN)
CHEN XIANYI (CN)
ZHANG WEI (CN)
HE YINGHAO (CN)
ZHENG QINGQING (CN)
YUE GUOHUA (CN)
TANG GAOMING (CN)
LU PINGGUANG (CN)
LI YUXIN (CN)
SUN CHAO (CN)
ZHEN LINGYUN (CN)
CHEN XIANYI (CN)
ZHANG WEI (CN)
HE YINGHAO (CN)
ZHENG QINGQING (CN)
YUE GUOHUA (CN)
TANG GAOMING (CN)
LU PINGGUANG (CN)
LI YUXIN (CN)
SUN CHAO (CN)
ZHEN LINGYUN (CN)
Application Number:
PCT/CN2022/123540
Publication Date:
May 25, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
HISENSE VISUAL TECH CO LTD (CN)
International Classes:
H04N9/31; G03B21/53
Foreign References:
| CN114727079A | 2022-07-08 | |||
| CN115002433A | 2022-09-02 | |||
| CN114885138A | 2022-08-09 | |||
| CN109856902A | 2019-06-07 | |||
| CN109426060A | 2019-03-05 | |||
| CN102681312A | 2012-09-19 | |||
| JP2008216352A | 2008-09-18 |
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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