US 12,379,322 B2
Sparkle contrast correcting method, comparing method, comparing apparatus, electronic display manufacturing method, and anti-glare layer manufacturing method
Makio Kurashige, Tokyo (JP); Gen Furui, Tokyo (JP); Kazutoshi Ishida, Tokyo (JP); Hiroko Suzuki, Tokyo (JP); Masayuki Tsunekawa, Tokyo (JP); Yukimitsu Iwata, Tokyo (JP); Norinaga Nakamura, Tokyo (JP); and Shumpei Nishio, Tokyo (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 18/247,570
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Nov. 24, 2020, PCT No. PCT/JP2020/043685
§ 371(c)(1), (2) Date Mar. 31, 2023,
PCT Pub. No. WO2022/070437, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2020-168022 (JP), filed on Oct. 2, 2020; and application No. 2020-180850 (JP), filed on Oct. 28, 2020.
Prior Publication US 2024/0027357 A1, Jan. 25, 2024
Int. Cl. G01N 21/84 (2006.01); G01N 21/95 (2006.01)
CPC G01N 21/8422 (2013.01) [G01N 2021/8427 (2013.01); G01N 2021/9513 (2013.01)] 34 Claims
OG exemplary drawing
 
1. A sparkle contrast correcting method comprising: a step of acquiring a first sparkle contrast that is caused by an anti-glare layer that is disposed on a surface of an electronic display and information that represents a first measurement condition, the first sparkle contrast being used as a comparison standard and being measured in the first measurement condition by using a first imaging lens that images emitted light from the anti-glare layer and a first two-dimensional image sensor on which the emitted light is imaged;
a step of acquiring a second sparkle contrast that is caused by the anti-glare layer and information that represents a second measurement condition, the second sparkle contrast being used as a comparison target and being measured in the second measurement condition that differs from the first measurement condition by using a second imaging lens that images emitted light from the anti-glare layer and a second two-dimensional image sensor on which the emitted light is imaged; and
a step of correcting the second sparkle contrast, based on a ratio between the first measurement condition and the second measurement condition for comparison with the first sparkle contrast.