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Patent Searching and Data


Title:
COLLIMATION FILM AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/169722
Kind Code:
A1
Abstract:
Disclosed are a collimation film (4) and a preparation method therefor. The collimation film (4) sequentially comprises a collimation lens layer (41), a flexible substrate layer (42) and a collimation hole layer (43), wherein the collimation lens layer (41) contains a microlens array (41A) and a thickness (41B), and the collimation hole layer (43) comprises a collimation hole array; the collimation hole array is distributed in such a way as to be completely consistent with the microlens array (41A); and the microlens array (41A) of the collimation lens layer (41) is arranged sequentially. The collimation film (4) only comprises one collimation hole layer (43), thereby solving the problem of the alignment of two collimation diaphragm layers being difficult. Diffused light at single-point pixels of an image can be collimated and filtered to a certain extent to form a normal small-beam optical signal which is transmitted to a corresponding photoelectric sensor. The collimation film is especially suitable for a large-size, ultrathin and even flexible image recognition module.

Inventors:
LI GANG (CN)
XIA YIN (CN)
FU KUN (CN)
GAO BINJI (CN)
WANG XIAOKAI (CN)
CHEN JIANWEN (CN)
TANG HAIJIANG (CN)
ZHANG YAN (CN)
Application Number:
PCT/CN2021/074161
Publication Date:
September 02, 2021
Filing Date:
January 28, 2021
Export Citation:
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Assignee:
NINGBO EXCITON TECH CO LTD (CN)
International Classes:
G06K9/00; G02B3/00
Domestic Patent References:
WO2019035629A12019-02-21
WO2017132360A12017-08-03
Foreign References:
CN110580473A2019-12-17
CN110730968A2020-01-24
CN109791612A2019-05-21
US20140218327A12014-08-07
Attorney, Agent or Firm:
BEIJING CELUE LAW FIRM (CN)
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