CLAIMS
1. A color conversion composition that converts incident
light into light with a wavelength longer than that of the
incident light, the color conversion composition comprising
the following Component (A) and Component (B):
Component (A): an organic light-emitting material; and Component (B): at least one of a polyester resin having a partial structure represented by General Formula (1) in a molecular structure of the polyester resin and a resin containing a bisphenol structure represented by General Formula (2):
(where Y is a divalent saturated aliphatic hydrocarbon group having at least one of a tertiary carbon and a quaternary carbon)

(where R1 and R2 each represents hydrogen or a C1-20 organic group; R1 and R2 are the same as or different from each other).
2. The color conversion composition according to claim 1,
wherein Y in the General Formula (1) is at least one
selected from groups of the following structures:

3. The color conversion composition according to claim 1
or 2, wherein Y in the General Formula (1) contains a group
of the following structure:
•
4. The color conversion composition according to any one
of claims 1 to 3, wherein when a weight ratio of the
partial structure represented by the General Formula (1) to
a total amount of the polyester resin contained as the
Component (B) is represented as mi% by weight, mi satisfies
10 < mi < 60.
5. The color conversion composition according to any one
of claims 1 to 4, wherein the polyester resin has at least
one of a partial structure represented by General Formula
(3) and a partial structure represented by General Formula
(4) in the molecular structure of the polyester resin:

6. The color conversion composition according to claim 5,
wherein
the polyester resin has at least the partial structure represented by the General Formula (3) in the molecular structure of the polyester resin, and
when a weight ratio of the partial structure represented by the General Formula (3) to a total amount of the polyester resin contained as the Component (B) is represented as m2% by weight, m2 satisfies 20 < m2 < 70.
7. The color conversion composition according to claim 5 or 6, wherein when a weight ratio of the partial structure represented by the General Formula (3) to a total amount of the polyester resin contained as the Component (B) is represented as m2% by weight, and a weight ratio of the partial structure represented by the General Formula (4) to a total amount of the polyester resin contained as the Component (B) is represented as m3% by weight, m2 and m3 satisfy 20 < m2 + m3 < 70.
8. The color conversion composition according to any one of claims 1 to 7, wherein the polyester resin has at least one of a partial structure represented by General Formula

(5) and a partial structure represented by General Formula
(6) in a molecular structure of the polyester resin:

(where ni and n2 are natural numbers, in which 2 < ni < 10 and 2 < n2 < 14).
9. The color conversion composition according to claim 8, wherein ni = 2, and n2 = 8.
10. The color conversion composition according to any one of claims 1 to 9, wherein a weight average molecular weight of the polyester resin is 5,000 or more and 100,000 or less.
11. The color conversion composition according to claim 1, wherein the resin containing the bisphenol structure has at least a structure represented by General Formula (7) in a molecular structure of the resin:
H2 H H2 -j~C -C—C -)- (7)
■
12. The color conversion composition according to claim 1 or 11, wherein a weight average molecular weight of the resin containing the bisphenol structure is 10,000 or more and 100,000 or less.
13. The color conversion composition according to any one of claims 1 to 12, wherein the Component (A) contains a compound represented by General Formula (8):

(where X is C-R9 or N; R3 to R11 are the same as or different from each other and are selected from hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxy group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxy group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, a phosphine oxide group, and a condensed ring and an aliphatic ring formed between adjacent substituents).
14. The color conversion composition according to claim 13, wherein X in the General Formula (8) is C-R9 in which R9 is a group represented by General Formula (9):
(where r is selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxy group, a thiol group, an alkoxy group, an alkylthio group, an aryl ether group, an aryl thioether group, an aryl group, a heteroaryl group, halogen, a cyano group, an aldehyde group, a carbonyl group, a carboxy group, an oxycarbonyl group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group, and a phosphine oxide group; k is an integer of 1 to

3; when k is 2 or more, rs are the same as or different from each other).
15. The color conversion composition according to claim 13 or 14, wherein R3, R5, R6, and R8 in the General Formula (8) are the same as or different from each other and are substituted or unsubstituted phenyl groups.
16. The color conversion composition according to claim 13 or 14, wherein R3, R5, R6, and R8 in the General Formula (8) are the same as or different from each other and are substituted or unsubstituted alkyl groups.
17. The color conversion composition according to any one of claims 1 to 16, wherein the Component (A) contains a light-emitting material that exhibits light emission with a peak wavelength observed in a region of 500 nm or more and 580 nm or less by using excitation light in a wavelength range of 400 nm or more and 500 nm or less.
18. The color conversion composition according to any one of claims 1 to 17, wherein the Component (A) contains the following Light-Emitting Material (a) and Light-Emitting Material (b):
Light-Emitting Material (a) : a light-emitting material that exhibits light emission with a peak wavelength observed in a region of 500 nm or more and 580 nm or less by using excitation light in a wavelength range of 400 nm or more and 500 nm or less, and
Light-Emitting Material (b): a light-emitting material that exhibits light emission with a peak wavelength observed in a region of 580 nm or more and 750 nm or less by being excited by at least either excitation light in a wavelength

range of 400 nm or more and 500 nm or less or light emission from the Light-Emitting Material (a).
19. The color conversion composition according to claim 18,
wherein a content wa of the Light-Emitting Material (a) and
a content wb of the Light-Emitting Material (b) have a
relation of wa > Wb.
20. The color conversion composition according to any one of claims 17 to 19 citing claim 13, wherein the light-emitting material that exhibits light emission with a peak wavelength of 500 nm or more and 580 nm or less by using the excitation light in a wavelength range of 400 nm or more and 500 nm or less is the compound represented by the General Formula (8).
21. The color conversion composition according to any one of claims 18 to 20 citing claim 13, wherein the Light-Emitting Material (b) is the compound represented by the General Formula (8).
22. A color conversion sheet comprising a layer of the color conversion composition according to any one of claims 1 to 21 or a layer of a cured object of the color conversion composition according to any one of claims 1 to 21.
23. The color conversion sheet according to claim 22, further comprising a barrier layer.
24. A light source unit comprising:
a light source; and
the color conversion sheet according to claim 22 or 23.

25. The light source unit according to claim 24, wherein the light source is a light-emitting diode having maximum emission in a range of 400 nm or more and 500 nm or less.
26. A display comprising the light source unit according to claim 24 or 25.
27. A lighting apparatus comprising the light source unit according to claim 24 or 25.
28. An LED chip comprising a light-emitting face provided with the color conversion sheet according to claim 22 or 23.
29. An LED package comprising a cured object of the color conversion composition according to any one of claims 1 to 21.
30. An LED package comprising the color conversion sheet according to claim 22 or 23.
31. A backlight unit comprising the LED package according to claim 29 or 30.
32. A display comprising the LED package according to claim 29 or 30.
33. A lighting apparatus comprising the LED package according to claim 29 or 30.

A color conversion composition as a mode of the present invention is a color conversion composition that contains the following Component (A) and Component (B) and converts incident light into light with a wavelength longer than that of the incident light. This color conversion composition and a color conversion sheet containing the same are used for a light source unit, a display, a lighting apparatus, a backlight unit, an LED chip, and an LED package.
Component (A): an organic light-emitting material; and Component (B): at least one of a polyester resin having a partial structure represented by General Formula (1) in its molecular structure and a resin containing a bisphenol structure represented by General Formula (2):
-4-0— Y—o—J— (1)
(where Y is a divalent saturated aliphatic hydrocarbon group having at least one of a tertiary carbon and a quaternary carbon)
(where R1 and R2 each represent hydrogen or a C1-20 organic group; R1 and R2 may be the same as or different from each other),