Title:
DIOPTER-ADJUSTABLE EYEPIECE OPTICAL SYSTEM AND HEAD-MOUNTED DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/141408
Kind Code:
A1
Abstract:
A diopter-adjustable eyepiece optical system and a head-mounted display device. The eyepiece optical system comprises a first lens group (T1), a second lens group (T2), and a third lens group (T3) which are sequentially arranged from a human eye (EYE) observation side to a micro image display (IMG) along an optical axis direction; the effective focal length of the first lens group (T1) is a positive value; the effective focal length of the second lens group (T2) is a negative value; an optical surface (6), close to the micro image display (IMG), in the third lens group (T3) protrudes towards the micro image display (IMG); the first lens group (T1) is fixed relative to human eyes (EYE); when the focal length of the optical system is increased, the second lens group (T2) and the third lens group (T3) move towards the human eyes (EYE) along the optical axis; by means of optical zooming, users having different diopters can focus at fixed points according to specific usage situations, such that the problem of image offset in the zooming process is avoided, images having large field of view, high definition, no distortion, and no image offset are presented for the users, the consistency of images watched by different users is ensured, the range of the users is expanded, and the user experience is improved.
Inventors:
GUO JIANFEI (CN)
CAO HONGPENG (CN)
PENG HUAJUN (CN)
CAO HONGPENG (CN)
PENG HUAJUN (CN)
Application Number:
PCT/CN2020/142174
Publication Date:
July 07, 2022
Filing Date:
December 31, 2020
Export Citation:
Assignee:
SHENZHEN NADE OPTICAL CO LTD (CN)
International Classes:
G02B27/01; G02B1/04; G02B3/02; G02B25/00
Domestic Patent References:
| WO2019054358A1 | 2019-03-21 |
Foreign References:
| CN112666711A | 2021-04-16 | |||
| CN104718484A | 2015-06-17 | |||
| CN107884924A | 2018-04-06 | |||
| US4834513A | 1989-05-30 | |||
| CN104603669A | 2015-05-06 | |||
| CN104423030A | 2015-03-18 |
Attorney, Agent or Firm:
SHENZHEN DUOZHIHUI NEW INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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