Title:
FRESNEL LENS GROUP AND VIRTUAL REALITY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/226734
Kind Code:
A1
Abstract:
The present application belongs to the technical field of display. Disclosed are a Fresnel lens group and a virtual reality device. The Fresnel lens group comprises a first Fresnel lens and a light blocking unit. The light blocking unit comprises a light blocking pattern, the first Fresnel lens is provided with a plurality of vertex angles, and the light blocking pattern and at least some of the plurality of vertex angles overlap in a direction parallel to an optical axis of the first Fresnel lens, so that the light emitting amount of an inactive surface of the first Fresnel lens can be reduced, and thus stray light emitted from the first Fresnel lens can be reduced. Therefore, the present application can solve the problem of poor imaging quality of Fresnel lens groups in the relevant art, and can improve the imaging quality of the Fresnel lens groups.
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Inventors:
HUANG HAITAO (CN)
CHEN LILI (CN)
HAN NA (CN)
CHEN LILI (CN)
HAN NA (CN)
Application Number:
PCT/CN2023/092665
Publication Date:
November 30, 2023
Filing Date:
May 08, 2023
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
International Classes:
G02B3/08; G02B3/00; G02B27/01
Foreign References:
| CN114859450A | 2022-08-05 | |||
| CN112578550A | 2021-03-30 | |||
| CN1701276A | 2005-11-23 | |||
| CN113740944A | 2021-12-03 | |||
| CN113759446A | 2021-12-07 | |||
| CN114280708A | 2022-04-05 |
Attorney, Agent or Firm:
BEIJING SAN GAO YONG XIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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