Claims
- 1. A backlight, comprising a lens sheet which comprises a transparent substrate and a lens section having a refractive index of 1.60 or greater, wherein the lens section is formed on the transparent substrate from an active energy ray-curable composition, wherein the active energy ray-curable composition comprises:(A) 20 to 80 parts by weight of a compound represented by the following general formula I: wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2,(B) 20 to 80 parts by weight of at least one compound having at least one acryloyl or methacryloyl group in the molecule, and (C) 0.01 to 5 parts by weight of an active energy ray-sensitive radical polymerization initiator with respect to 100 parts by weight of the total of said components (A) and (B).
- 2. The backlight according to claim 1, wherein said lens section has a refractive index of 1.61 or greater.
- 3. The backlight according to claim 1, wherein said lens sheet comprises a plurality of minute prism rows.
- 4. The backlight according to claim 3, wherein the vertical angle of each of the prisms in the prism rows is 80-150 degrees.
- 5. The backlight according to claim 1, wherein the compound constituting said component (A) is bis(4-methacryloylthiophenyl)sulfide.
- 6. A backlight, comprising a lens sheet which comprises a transparent substrate and a lens section having a refractive index of 1.60 or greater, wherein the lens section is formed on the transparent substrate from an active energy ray-curable composition, wherein the active energy ray-curable composition comprises:(A) 20 to 80 parts by weight of a compound represented by the following general formula I: wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2,(B-1) 10 to 90 parts by weight of at least one compound having at least two acryloyl or methacryloyl groups in the molecule, (B-2) 1 to 90 parts by weight of at least one monoacrylate or monomethacrylate compound having one acryloyl or methacryloyl group in the molecule, and (C) 0.01 to 5 parts by weight of an active energy ray-sensitive radical polymerization initiator with respect to 100 parts by weight of the total of said components (A), (B-1) and (B-2).
- 7. The backlight according to claim 6, wherein said lens section has a refractive index of 1.61 or greater.
- 8. The backlight according to claim 6, wherein said lens sheet comprises a plurality of minute prism rows.
- 9. The backlight according to claim 3, wherein the vertical angle of each of the prisms in the prism rows is 80-150 degrees.
- 10. The backlight according to claim 6, wherein the compound constituting said component (A) is bis(4-methacryloylthiophenyl)sulfide.
- 11. The backlight according to claim 6, wherein the compound having at least two acryloyl or methacryloyl groups in the molecule, which constitutes said component (B-1), is selected from compounds represented by the following general formula II: wherein R2 represents hydrogen or methyl, V and W may be the same or different and represent methyl, chlorine, bromine or iodine, p and q each independently represent an integer of 0-2, R3 represents m and n represent integers of 0-5, and z represents
- 12. The backlight according to claim 11, wherein the compound having at least two acryloyl or methacryloyl groups in the molecule, which constitutes said component (B-1), is selected from 2,2-bis(4-methacryloyloxyethoxyphenyl)-propane, 2,2-bis(4-acryloyloxyethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxydiethoxyphenyl)-propane, 2,2-bis(4-acryloyloxydiethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxytriethoxyphenyl)-propane, 2,2-bis(4-acryloyloxytriethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxytetraethoxyphenyl)-propane, 2,2-bis(4-acryloyloxytetraethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxypentaethoxyphenyl)-propane and 2,2-bis(4-acryloyloxypentaethoxyphenyl)-propane.
- 13. The backlight according to claim 6, wherein the monoacrylate or monomethacrylate compound which constitutes said component (B-2) is selected from compounds represented by the following general formulas III, IV, V and VI: wherein R4 represents hydrogen or methyl, G represents methyl, chlorine, bromine or iodine, i represents an integer of 0-5, j represents an integer of 0-4, R5 represents and m and n represent integers of 0-5.
- 14. The backlight according to claim 13, wherein the monoacrylate or monomethacrylate compound which constitutes said component (B-2) is selected from phenyl methacrylate, phenyl acrylate, benzyl methacrylate, benzyl acrylate, phenoxyethyl methacrylate, phenoxyethyl acrylate, phenoxy-2-methylethyl methacrylate, phenoxyethoxyethyl methacrylate, phenoxyethoxyethyl acrylate, 3-phenoxy-2-hydroxypropyl methacrylate, 3-phenoxy-2-hydroxypropyl acrylate, 2-phenylphenyl methacrylate, 2-phenylphenyl acrylate, 4-phenylphenyl methacrylate, 4-phenylphenyl acrylate, 2-phenylphenoxyethyl methacrylate, 2-phenylphenoxyethyl acrylate, 3-(2-phenylphenyl)-2-hydroxypropyl methacrylate, 3-(2-phenylphenyl)-2-hydroxypropyl acrylate, 2-bromophenoxyethyl methacrylate, 2-bromophenoxyethyl acrylate, 2,4-dibromophenoxyethyl methacrylate, 2,4-dibromophenoxyethyl acrylate, phenylthioethyl methacrylate, phenylthioethyl acrylate, phenylthioethoxy methacrylate, phenylthioethoxy acrylate, phenylthiodiethoxy methacrylate, phenylthiodiethoxy acrylate, 2-phenylphenylthioethyl methacrylate, 2-phenylphenylthioethyl acrylate, 4-chlorophenylthioethyl methacrylate, 4-chlorophenylthioethyl acrylate, benzylthioethyl methacrylate and benzylthioethyl acrylate.
- 15. A backlight, comprising a lens sheet which comprises a transparent substrate and a lens section having a refractive index of 1.60 or greater, wherein the lens section is formed on the transparent substrate from an active energy ray-curable composition;wherein the active energy ray-curable composition comprises: (A) 20 to 80 parts by weight of a compound represented by the following general formula I: wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2,(B-1) 10 to 90 parts by weight of at least one compound having at least two acryloyl or methacryloyl groups in the molecule, (B-2) 1 to 90 parts by weight of at least one monoacrylate or monomethacrylate compound having one acryloyl or methacryloyl group in the molecule, and (C) 0.01 to 5 parts by weight of an active energy ray-sensitive radical polymerization initiator with respect to 100 parts by weight of the total of said components (A), (B-1) and (B-2); and wherein the compound having at least two acryloyl or methacryloyl groups in the molecule, which constitutes said component (B-1), is selected from compounds represented by the following general formula II: wherein R2 represents hydrogen or methyl, V and W may be the same or different and represent methyl, chlorine, bromine or iodine, p and q each independently represent an integer of 0-2, R3 represents m and n represent integers of 0-5, and z represents
- 16. The backlight according to claim 15, wherein said lens section has a refractive index of 1.61 or greater.
- 17. The backlight according to claim 15, wherein said lens sheet comprises a plurality of minute prism rows.
- 18. The backlight according to claim 17, wherein the vertical angle of each of the prisms in the prism rows is 80-150 degrees.
- 19. The backlight according to claim 15, wherein the compound constituting said component (A) is bis(4-methacryloylthiophenyl)sulfide.
- 20. A backlight, comprising a lens sheet which comprises a transparent substrate and a lens section having a refractive index of 1.60 or greater, wherein the lens section is formed on the transparent substrate from an active energy ray-curable composition;wherein the active energy ray-curable composition comprises: (A) 20 to 80 parts by weight of a compound represented by the following general formula I: wherein R1 represents hydrogen or methyl, X and Y may be the same or different and represent methyl, chlorine, bromine or iodine, and t and u each independently represent an integer of 0-2,(B-1) 10 to 90 parts by weight of at least one compound having at least two acryloyl or methacryloyl groups in the molecule, (B-2) 1 to 90 parts by weight of at least one monoacrylate or monomethacrylate compound having one acryloyl or methacryloyl group in the molecule, and (C) 0.01 to 5 parts by weight of an active energy ray-sensitive radical polymerization initiator with respect to 100 parts by weight of the total of said components (A), (B-1) and (B-2); and wherein the compound having at least two acryloyl or methacryloyl groups in the molecule, which constitutes said component (B-1), is selected from the group consisting of 2,2-bis(4-methacryloyloxyethoxyphenyl)-propane, 2,2-bis(4-acryloyloxyethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxydiethoxyphenyl)-propane, 2,2-bis(4-acryloyloxydiethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxytriethoxyphenyl)-propane, 2,2-bis(4-acryloyloxytriethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxytetraethoxyphenyl)-propane, 2,2-bis(4-acryloyloxytetraethoxyphenyl)-propane, 2,2-bis(4-methacryloyloxypentaethoxyphenyl)-propane and 2,2-bis(4-acryloyloxypentaethoxyphenyl)-propane.
- 21. The backlight according to claim 20, wherein said lens section has a refractive index of 1.61 or greater.
- 22. The backlight according to claim 20, wherein said lens sheet comprises a plurality of minute prism rows.
- 23. The backlight according to claim 22, wherein the vertical angle of each of the prisms in the prism rows is 80-150 degrees.
- 24. The backlight according to claim 20, wherein the compound constituting said component (A) is bis(4-methacryloylthiophenyl)sulfide.
Priority Claims (3)
Number |
Date |
Country |
Kind |
6-277151 |
Oct 1994 |
JP |
|
6-277153 |
Oct 1994 |
JP |
|
6-277154 |
Oct 1994 |
JP |
|
Parent Case Info
This application is a Division of application Ser. No. 08/652,464 Filed on Jun. 14, 1996, now U.S. Pat. No. 5,969,867, which was filed as International Application No. PCT/JP95/02128, filed Oct. 17, 1995.
US Referenced Citations (8)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0 376 254 |
Jul 1990 |
EP |
0 515 697 A1 |
Dec 1992 |
EP |
5-303003 |
Nov 1993 |
JP |
06 016 754 |
Jan 1994 |
JP |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 017, No. 448 (P-1594), Aug. 17, 1993 & JP 05 100106 A (Dainippon Printing Co., LTD) Apr. 23, 1993. |