Title:
METHOD FOR DETECTING EDGE PART OF OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2022/123858
Kind Code:
A1
Abstract:
Provided is a method for detecting the edge part of an optical film with which it is possible to reliably detect the edge part of an optical film affixed to a rectangular panel. The detection method includes: a transportation step for transporting a rectangular panel on which an optical film is laminated; an imaging step for imaging a target region including the edge part of the optical film on the rectangular panel; an optimum image selection step for selecting, from a plurality of images obtained by imaging the target region at a plurality of positions, an optimum image for detecting the edge part; and an edge part detection step for detecting the edge part in the optimum image. In the imaging step, light is sequentially beamed from a plurality of light sources disposed along the transportation direction in which the rectangular panels are transported, and the target region is imaged at a plurality of positions extending from the upstream side to the downstream side with respect to the transportation direction by a single imaging means.
Inventors:
UNEME NOBUHISA (JP)
Application Number:
PCT/JP2021/034605
Publication Date:
June 16, 2022
Filing Date:
September 21, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G01N21/86; G01N21/88; G01N21/958
Domestic Patent References:
| WO2014057881A1 | 2014-04-17 |
Foreign References:
| JP2016038565A | 2016-03-22 | |||
| JP2007256106A | 2007-10-04 | |||
| JP2015187581A | 2015-10-29 | |||
| JPH11223608A | 1999-08-17 | |||
| JP2018146581A | 2018-09-20 | |||
| US20180009211A1 | 2018-01-11 | |||
| JP2011197281A | 2011-10-06 | |||
| JP2016118580A | 2016-06-30 | |||
| JP4377964B1 | 2009-12-02 |
Attorney, Agent or Firm:
THE PATENT CORPORATE BODY PSD (JP)
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