Composition for near-infrared light-absorbing films, near-infrared light-absorbing layers, camera modules, and electronic devices

Patent metadata

Field	Value
Publication number	US-11333809-B2
Application number	US-201816023037-A
Country	US
Kind code	B2
Filing date	Jun 29, 2018
Priority date	Sep 12, 2017
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

A composition for a near-infrared light-absorbing film includes a binder and compounds represented by separate particular chemical formulae. A near-infrared light-absorbing film may include a near-infrared light-absorbing layer including a cured product of the composition. A camera device may include the near-infrared light-absorbing film, and an electronic device may include the camera device.

First claim

What is claimed is:

1. A composition, comprising:
a binder, a compound represented by Chemical Formula 1, and a compound represented by Chemical Formula 2:

wherein, in Chemical Formula 1 and Chemical Formula 2,
R 1 to R 8 are independently a hydrogen atom or a substituted or unsubstituted C1 to C8 alkyl group,
R 9 to R 16 are independently a hydrogen atom, a substituted or unsubstituted C1 to C8 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group,
X is PF 6 − or BF 4 − ,
Y is PF 6 − , and
n is an integer ranging from 1 to 10,

wherein the compound represented by Chemical Formula 1 and the compound represented by Chemical Formula 2 are included in the composition in weight ratio of about 1:1 to about 1:3.

2. The composition of claim 1 , wherein
the compound represented by Chemical Formula 1 has a maximum absorption wavelength (λ max ) within a wavelength spectrum of about 700 nm to about 800 nm, and
the compound represented by Chemical Formula 2 has a maximum absorption wavelength (λ max ) within a wavelength spectrum of about 800 nm to about 1200 nm.

3. The composition of claim 1 , wherein
the composition includes a first amount of the compound represented by Chemical Formula 1 and a second amount of the compound represented by Chemical Formula 2, and
a total amount of the first amount and the second amount is an amount of about 0.2 parts by weight to about 5.0 parts by weight relative to 100 parts by weight of the binder.

4. The composition of claim 1 , further comprising:
a squarylium-based compound represented by Chemical Formula 3:

wherein, in Chemical Formula 3,
R 17 to R 26 are independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, or a substituted or unsubstituted C6 to C20 aryl group.

5. The composition of claim 1 , wherein
the compound represented by Chemical Formula 1 has an absorbance at a maximum absorption wavelength (λ max ) that is at least about 30 times as great as an absorbance of the compound represented by Chemical Formula 1 at a wavelength of about 550 nm, and
the compound represented by Chemical Formula 2 has an absorbance at a maximum absorption wavelength (λ max ) that is at least about 20 times as great as an absorbance of the compound represented by Chemical Formula 2 at a wavelength of about 550 nm.

6. The composition of claim 1 , wherein the composition has an average light transmittance of less than or equal to about 10% in a wavelength spectrum of light of about 700 nm to about 740 nm.

7. The composition of claim 1 , wherein the composition has an average light transmittance of greater than or equal to about 82% in a wavelength spectrum of light of about 430 nm to about 565 nm.

8. The composition of claim 1 , wherein the binder includes an acrylic binder, an epoxy binder, or a combination thereof.

9. A film comprising a layer including a cured product of the composition of claim 1 .

10. The film of claim 9 , which further includes a polymer film on one surface of the layer.

11. The film of claim 10 , wherein the polymer film includes polyethylene terephthalate, polyethylene naphthalate, triacetyl cellulose, polycarbonate, a cycloolefin polymer, poly(meth)acrylate, polyimide, or a combination thereof.

12. The film of claim 10 , wherein the polymer film is configured to selectively absorb light in a wavelength spectrum of light that is at least a portion of an ultraviolet (UV) wavelength spectrum of light.

13. The film of claim 10 , wherein the layer is configured to absorb near-infrared light, and the film further comprises:
an additional near-infrared light-absorbing layer on at least one surface of
one surface of the polymer film, and
another one surface of the layer.

14. The film of claim 13 , wherein the additional near-infrared light-absorbing layer includes a copper phosphate salt.

15. The film of claim 9 , which has a thickness of about 25 μm to about 110 μm.

16. A camera device comprising the film of claim 9 .

17. The camera device of claim 16 , further comprising:
a lens, and
an image sensor.

18. An electronic device comprising the camera device of claim 16 .

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Changki
• Won Jong Hoon
• Kim Hyung Jun
• Lee Yong Joo
• Jung Myungsup

Classifications

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• B32B7/023

  Optical properties · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/50

  Constructional details · CPC title

• C09D133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title