US 11,719,867 B2
Optical filter, and camera module and electronic device comprising the same
Jong Hoon Won, Yongin-si (KR); Changki Kim, Suwon-si (KR); Hyung Jun Kim, Suwon-si (KR); Yong Joo Lee, Suwon-si (KR); and Myungsup Jung, Seongnam-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 29, 2021, as Appl. No. 17/489,020.
Application 17/489,020 is a continuation of application No. 16/175,022, filed on Oct. 30, 2018, granted, now 11,181,673.
Claims priority of application No. 10-2017-0144897 (KR), filed on Nov. 1, 2017.
Prior Publication US 2022/0019005 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 1/04 (2006.01); G02B 1/11 (2015.01); G02B 5/20 (2006.01); G02B 5/22 (2006.01); C08K 5/23 (2006.01); C09B 57/00 (2006.01); C08K 5/3417 (2006.01); C08K 5/52 (2006.01); C08K 3/08 (2006.01); C09B 23/08 (2006.01); C09B 53/02 (2006.01); H10K 30/80 (2023.01); H10K 39/32 (2023.01)
CPC G02B 5/208 (2013.01) [C08K 3/08 (2013.01); C08K 5/235 (2013.01); C08K 5/3417 (2013.01); C08K 5/52 (2013.01); C09B 23/08 (2013.01); C09B 53/02 (2013.01); C09B 57/00 (2013.01); C09B 57/007 (2013.01); G02B 1/04 (2013.01); G02B 1/11 (2013.01); G02B 5/223 (2013.01); C08K 2003/085 (2013.01); H10K 30/80 (2023.02); H10K 39/32 (2023.02)] 27 Claims
OG exemplary drawing
 
1. An optical filter, comprising
a polymer film having a* of about −5.0 to about +5.0 and b* of about −5.0 to about +5.0, based on a color coordinate expressed by a CIE Lab color space; and
a near infrared absorption layer on the polymer film, the near infrared absorption layer being configured to transmit light in a visible region and to selectively absorb at least one part of light in a near infrared region,
the near infrared absorption layer including a first near infrared absorption material and a second near infrared absorption material,
the first near infrared absorption material including a copper phosphate ester compound represented by Chemical Formula 4:

OG Complex Work Unit Chemistry
wherein, in Chemical Formula 4,
R41 and R42 are independently one of a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C20 alkynyl group, or a substituted or unsubstituted C6 to C20 aryl group,
n1 is an integer of 0 or 1, and
n2 is an integer of 1 or 2,
the second near infrared absorption material including at least two different organic dyes, and
the second near infrared absorption material having a maximum absorption wavelength (λmax) in a wavelength region of about 650 nm to about 1200 nm.