Wavelength-selective absorption filter and display device

Abstract

Provided is a wavelength-selective absorption filter including a resin, a pigment, and a compound that has a molecular weight of 1,000 or less and includes at least one polar group from among a carboxylic acid ester bond, a carboxylic acid amide bond, a sulfonic acid amide bond, a urethane bond, and a sulfonyl bond. The pigment includes at least one of a dye A having a main absorption wavelength band at wavelengths of 390-440 nm and a dye D having a main absorption wavelength band at wavelengths of 680-780 nm. When the dye A is included, a 20% value wavelength A with respect to the maximum absorbance value exhibited by the main absorption wavelength is 455 nm or less, and when the dye D is included, a 20% value wavelength D with respect to the maximum absorbance value exhibited by the main absorption wavelength is 640 nm or more. Also provided is a display device including the wavelength-selective absorption filter.

Claims

1. The material comprises a resin, a dye, and a compound having at least one polar group of the following: a carboxylic acid ester bond, a carboxylic acid amide bond, a sulfonic acid amide bond, a urethane bond, and a sulfonyl bond, and having a molecular weight of 1000 or less. The aforementioned dye comprises at least one of dye A and dye D shown below. When the dye A is included, the longer wavelength of the two wavelengths that give 20% of the absorbance to the absorbance maximum value at wavelengths of 390 to 440 nm is 455 nm or less. When the dye D is included, the shorter of the two wavelengths that give 20% of the absorbance to the absorbance maximum value at wavelengths of 680 to 780 nm is 640 nm or higher. Wavelength-selective absorption filter. Dye A: A dye having a main absorption wavelength band in the range of 390-440 nm. Dye D: A dye whose main absorption wavelength band is in the range of 680-780 nm.

2. The wavelength-selective absorption filter according to claim 1, wherein the dye comprises both dye A and dye D.

3. The wavelength-selective absorption filter according to claim 1 or 2, wherein the dye A is a pigment represented by the following general formula (A1). 【Chemistry 1】 In the above formula, R １ and R ２ Each independently represents an alkyl group or an aryl group, R ３ ~R ６ Each of these independently represents a hydrogen atom or a substituent, R ５ and R ６ These may be bonded to each other to form a six-membered ring.

4. The wavelength-selective absorption filter according to claim 1, wherein the dye comprises the dye A, or comprises the dye A and the dye D, wherein the dye A is a dye represented by the following general formula (A1). 【Chemistry 2】 In the above formula, R １ and R ２ each independently represent an alkyl group or an aryl group, and R ３ to R ６ each independently represent a hydrogen atom or a substituent, and R ５ and R ６ may be bonded to each other to form a six-membered ring.

5. The wavelength-selective absorption filter according to any one of claims 1 to 4, wherein the dye D is a squalin-based dye represented by the following general formula (1). 【Transformation 3】 In the above formula, A and B each independently represent an optionally substituted aryl group, an optionally substituted heterocyclic group, or -CH=G. G represents an optionally substituted heterocyclic group.

6. The wavelength-selective absorption filter according to any one of claims 1 to 5, wherein the compound having the polar group is a compound having a carboxylic acid ester bond.

7. The wavelength-selective absorption filter according to any one of claims 1 to 5, wherein the compound having the polar group is a compound having a carboxylic acid amide bond.

8. The wavelength-selective absorption filter according to any one of claims 1 to 7, wherein the resin comprises a polystyrene resin.

9. The wavelength-selective absorption filter according to any one of claims 1 to 7, wherein the resin comprises a cyclic polyolefin resin.

10. A display device comprising a wavelength-selective absorption filter according to any one of claims 1 to 9.

11. The display device according to claim 10, wherein the display device is a self-illuminating display device.

Images