RED FLUORESCENCE CONVERSION COMPOSITION AND RED FLUORESCENCE CONVERSION FILM

• US 20120308792A1
• Filed: 10/28/2010
• Published: 12/06/2012
• Est. Priority Date: 01/08/2010
• Status: Abandoned Application

• Current Assignee: Harima Chemicals Incorporated, Sharp Corporation (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Harima Chemicals Incorporated, Sharp Corporation (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ishida, Takeshi, Isobe, Shinichiro, Kawashima, Shinichi, Mataka, Shuntaro
• Application Number:
  US13/520,881
• Publication Number:
  US 20120308792A1
• Time in Patent Office: Days
• US Class Current: 428/212
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1062 with oxygen
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Abstract

A red fluorescence conversion composition includes a color conversion material (A) which absorbs light in a blue region and emits light having a fluorescence emission maximum in yellow-orange regions; a color conversion material (B) which absorbs light in the yellow-orange regions and emits light having a fluorescence emission maximum in the red region; and a matrix resin (C) for dispersing the color conversion materials (A) and (B). The color conversion material (A) is a condensed polycyclic compound made of a 5-membered ring compound having a conjugated system, and a 6-membered ring compound having a conjugated system with the 5-membered ring compound. The 5-membered ring compound contains at least one kind of atom selected from a hetero atom, a selenium atom, and a boron atom. A red fluorescence conversion film is made of the composition.

Claims

1. A red fluorescence conversion composition which absorbs light in a blue region obtained from a light source and emits light in a red region, comprising:

a color conversion material (A) which absorbs light in the blue region and emits light having a fluorescence emission maximum in yellow-orange regions;

a color conversion material (B) which absorbs light in the yellow-orange regions and emits light having a fluorescence emission maximum in the red region; and

a matrix resin (C) for dispersing the color conversion materials (A) and (B), wherein the color conversion material (A) is a condensed polycyclic compound comprising a 5-membered ring compound having a conjugated system, and a 6-membered ring compound having a conjugated system with the 5-membered ring compound, and

the 5-membered ring compound contains at least one kind of atom selected from a hetero atom, a selenium atom, and a boron atom.

2. The red fluorescence conversion composition according to claim 1, wherein the condensed polycyclic compound is an azole derivative or an imidazole derivative.

3. The red fluorescence conversion composition according to claim 1, wherein the condensed polycyclic compound is a compound shown by general formula (1), (2), (3), or (4):

5. The red fluorescence conversion composition according to claim 1, wherein in the color conversion material (B), a full width at half maximum of an emission spectrum is 100 nm or less, and an x value and a y value shown by x- and y-coordinates on a CIE xy chromaticity diagram are 0.55 or more and 0.45 or less, respectively.

6. The red fluorescence conversion composition according to claim 1, wherein a ratio by weight of the color conversion material (A) to the color conversion material (B) is 70:

30 to 99.9;

0.1.

7. The red fluorescence conversion composition according to claim 1, wherein a total content of the color conversion materials (A) and (B) is 1 to 30% by weight in terms of solid content with respect to the matrix resin (C).

8. The red fluorescence conversion composition according to claim 1, wherein color conversion efficiency is 80% or more.

9. A red fluorescence conversion film, comprising the red fluorescence conversion composition according to claim 1

10. The red fluorescence conversion film according to claim 9, wherein a film thickness is 0.5 to 9 μ

m.

11. The red fluorescence conversion film according to claim 9, wherein a mixture of the color conversion materials (A) and (B) is dispersed in the matrix resin (C).

12. The red fluorescence conversion film according to claim 9, comprising:

a color conversion film (D) in which the color conversion material (A) is dispersed in the matrix resin (C); and

a color conversion film (E) in which the color conversion material (B) is dispersed in the matrix resin (C), wherein

the color conversion films (D) and (E) are sequentially laminated from the light source side.

13. A liquid crystal display device using the red fluorescence conversion film according to claim 9.

14. An organic EL display device using the red fluorescence conversion film according to claim 9.

15. An inorganic EL display device using the red fluorescence conversion film according to claim 9.

4. (canceled)