Polyester film for display

1. A polyester film for display which comprises:

a polyester film substrate containing an ultraviolet light absorber; and

a coating layer formed on at least one surface of said polyester film substrate, said polyester film having a haze of not more than 2.0% and a light transmittance at 380 nm of not more than 5.0%,

and which polyester film has ΔR of not more than 2.0%, said ΔR being defined by the formula:

Δ R=Rs−Rc (min.)

where Rs is an average value of absolute reflectance values as measured on a surface of the coating layer in a wavelength range of 2,400 to 2,000 nm; and Rc(min.) is a minimum value of absolute reflectance values as measured on a surface of the coating layer in a wavelength range of 300 to 800 nm.

2. A polyester film for display according to claim 1 , wherein the ultraviolet light absorber is a benzoxazinone-based ultraviolet light absorber.

3. A polyester film for display according to claim 1 , wherein the polyester film substrate is a laminated film having at least three layers.

4. A polyester film for display according to claim 3 , the ultraviolet light absorber is contained in an intermediate layer of the at least three layers of the laminated film.

5. A polyester film for display according to claim 1 , having a color tone b* value of not more than 1.5.

6. A polyester film for display according to claim 1 , wherein a total amount of oligomers present on front and rear surfaces of the polyester film after the film is heat-treated at 180° C. for 10 minutes, is not more than 15 mg/m 2 .

7. A polyester film for display according to claim 1 , having a total light transmittance of not less than 75%.

8. A polyester film for display according to claim 1 , having a shrinkage percentage of not more than 2.0% in each of longitudinal and transverse direction thereof after heat-treated at 100° C. for 5 minutes.

9. An anti reflective film for display comprising a polyester film which comprises:

a polyester film substrate containing an ultraviolet light absorber; and

a coating layer formed on at least one surface of said polyester film substrate,

said polyester film having a haze of not more than 2.0% and a light transmittance at 380 nm of not more than 5.0%,

and which anti reflective film has ΔR of not more than 2.0%, said ΔR being defined by the formula:

Δ R=Rs−Rc (min.)

where Rs is an average value of absolute reflectance values as measured on a surface of the coating layer in a wavelength range of 2,400 to 2,000 nm; and Rc(min.) is a minimum value of absolute reflectance values as measured on a surface of the coating layer in a wavelength range of 300 to 800 nm.

10. An anti reflective film for display according to claim 9 , wherein the ultraviolet light absorber is a benzoxazinone-based ultraviolet light absorber.

11. An anti reflective film for display according to claim 9 , wherein the polyester film substrate is a laminated film having at least three layers.

12. An anti reflective film for display according to claim 11 , the ultraviolet light absorber is contained in an intermediate layer of the at least three layers of the laminated film.

13. An anti reflective film for display according to claim 9 , wherein said polyester film has a color tone b* value of not more than 1.5.

14. An anti reflective film for display according to claim 9 , wherein a total amount of oligomers present on front and rear surfaces of the polyester film after the film is heat-treated at 180° C. for 10 minutes, is not more than 15 mg/m 2 .

15. An anti reflective film for display according to claim 9 , wherein said polyester film has a total light transmittance of not less than 75%.

16. An anti reflective film for display according to claim 9 , wherein said polyester film has a shrinkage percentage of not more than 2.0% in each of longitudinal and transverse direction thereof after heat-treated at 100° C. for 5 minutes.