Screen and method for manufacturing the same

1. A screen for displaying an image projected thereon by projection light, comprising:

a substrate; and

a selectively reflective layer on said substrate, said selectively reflective layer comprising a reflective layer and a optical multilayer film, said optically multilayer film comprising a dielectric film and a light-absorbing thin film,

wherein,

said selectively reflective layer reflects light having a specific wavelength or wavelengths corresponding to said projection light, and absorbs light having a wavelength or wavelengths other than said specific wavelength or wavelengths,

said light-absorbing thin film is 5 nm to 20 nm thick and is formed from a material having a refractive index of 1 or more and an absorption coefficient of 0.5 or more, and

said reflective layer reflects light which has passed through said optical multilayer film.

2. A screen according to claim 1 , wherein said light-absorbing thin film is formed from a material selected from the group consisting of Nb, Nb alloys, C, Cr, Fe, Ge, Ni, Pd, Pt, Rh, Ti, TiN, TiN x W y , Mn, Ru, and PbTe.

3. A screen according to claim 1 , wherein said dielectric film is formed from a material selected from the group consisting of Nb 2 O 5 , TiO 2 , Ta 2 O 5 , Al 2 O 3 , and SiO 2 .

4. A screen according to claim 1 , wherein said reflective layer is a metallic substrate.

5. A screen according to claim 1 , wherein said reflective layer is a metallic film.

6. A screen according to claim 5 , wherein said reflective layer is formed from a material selected from the group consisting of Al, Nb, or Ag, or an alloy thereof.

7. A screen according to claim 1 , further comprising a diffusion layer for scattering the reflected light from said selectively reflective layer.

8. A screen according to claim 7 , further comprising an adhesive layer formed between said diffusion layer and said selectively reflective layer, combining both layers and including a coloring material which absorbs the light at said specific wavelength or wavelengths.

9. A screen according to claim 1 , wherein a plurality of protruding portions or depressed portions is formed on a surface of said reflective layer where said optical multilayer film is formed thereon for scattering said reflected light from said selectively reflective layer.

10. A screen according to claim 1 , wherein said specific wavelength region includes respective wavelength regions for a red light, green light, and blue light.

11. A screen according to claim 10 , wherein said selectively reflective layer has reflection properties such that reflection intensities in said wavelength or wavelengths are adjusted according to the intensities of said projection light of a light source in the wavelength or wavelengths of the respective RGB colors.

12. A screen according to claim 1 , wherein said specific wavelength or wavelengths having absorption properties includes the bright line peak of light from a fluorescent light.

13. A screen according to claim 1 , wherein said wavelength or wavelengths having absorption properties is aninged at the wavelengths between a wavelength of the bright line peak of red component and that of green component, and between a wavelength of the bright line peak of green component and that of blue component of said projection light respectively.

14. A method for manufacturing a screen comprising the steps of:

providing a metallic substrate; and

forming on the substrate, a selectively reflective layer which reflects light having a specific wavelength or wavelengths and absorbs light having a wavelength or wavelengths other than the specific wavelength or wavelengths,

wherein,

the step fir firming the selectively reflective layer comprises firming an optical multilayer film including a dielectric film and a 5 nm to 20 nm thick light-absorbing thin film formed from a material having a refractive index of 1 or more and an absorption coefficient of 0.5 or more.

15. A method for manufacturing a screen according to claim 14 , wherein said optical multilayer film is formed by sputtering method.

16. A method for manufacturing a screen according to claim 14 , wherein said metallic substrate is formed from a material selected from the group consisting of Al, Nb, or Ag, or an alloy thereof.

17. A method for manufacturing a screen according to claim 14 , wherein said light-absorbing thin film is formed from a material selected from the group consisting of Nb, Nb alloys, C, Cr, Fe, Ge, Ni, Pd, Pt, Rh, Ti, TiN, TiN x W y , Mn, Ru, and PbTe.

18. A method for manufacturing a screen according to claim 14 , wherein said dielectric film is formed from a material selected from the group consisting of Nb 2 O 5 , TiO 2 , Ta 2 O 5 , Al 2 O 3 , and SiO 2 .

19. A method for manufacturing a screen according to claim 14 , further comprising a step for forming a diffusion layer on said optical multilayer film for scattering light.

20. A method for manufacturing a screen according to claim 19 , wherein said step for forming a diffusion layer comprises a step for bonding said diffusion layer to said optical multilayer film through an adhesive layer having a coloring material which absorbs light in said specific wavelength region.

21. A method for manufacturing a screen according to claim 14 , wherein a plurality of protruding portions or depressed portions is formed on a surface of said metal substrate where said optical multilayer film is formed.

22. A method for manufacturing a screen according to claim 14 , wherein said specific wavelength or wavelengths includes respective wavelength or wavelengths for a red light, green light, and blue light.

23. A method for manufacturing a screen according to claim 14 , wherein said specific wavelength or wavelengths having absorption properties includes the bright line peak of light from a fluorescent light.

24. A method for manufacturing a screen according to claim 14 , wherein said wavelength or wavelengths having absorption properties is arranged at the wavelengths between a wavelength of the bright line peak of red component and that of green component, and between a wavelength of the bright line peak of green component and that of blue component of a possible light source respectively.

25. A method for manufacturing a screen, said method comprising the steps of:

providing a metallic substrate; and

forming, on the substrate, a selectively reflective layer which reflects light having a specific wavelength or wavelengths and absorbs light having a wavelength or wavelengths other than said specific wavelength or wavelengths,

wherein,

the step for forming the selectively reflective layer comprises forming an optical multilayer film including a dielectric film and a 5 nm to 20 nm thick light-absorbing thin film formed from a material having a refractive index of 1 or more and an absorption coefficient of 0.5 or more.

26. A method for manufacturing a screen according to claim 25 , wherein said metallic film and said optical multilayer film are formed by sputtering method.

27. A method for manufacturing a screen according to claim 25 , wherein said metallic film is formed from a material selected from the group consisting of Al, Nb, or Ag, or an alloy thereof.

28. A method for manufacturing a screen according to claim 25 , wherein said light-absorbing thin film is formed from a material selected from the group consisting of Nb, Nb alloys, C, Cr, Fe, Ge, Ni, Pd, Pt, Rh, Ti, TiN, TiN x W y , Mn, Ru, and PbTe.

29. A method for manufacturing a screen according to claim 25 , wherein said dielectric film is formed from a material selected from the group consisting of Nb 2 O 5 , TiO 2 , Ta 2 O 5 , Al 2 O 3 , and SiO 2 .

30. A method for manufacturing a screen according to claim 25 , further comprising a step for forming a diffusion layer on said optical multilayer film for scattering light.

31. A method for manufacturing a screen according to claim 30 , wherein said step for forming a diffusion layer comprises a step for bonding said diffusion layer to said optical multilayer film through an adhesive layer having a coloring material which absorbs light at said specific wavelength or wavelengths.

32. A method for manufacturing a screen according to claim 25 , wherein a plurality of protruding portions or depressed portions is formed on a surface of said substrate where said metallic film is formed.

33. A method for manufacturing a screen according to claim 25 , wherein said specific wavelength or wavelengths includes respective wavelength for a red light, green light, and blue light.

34. A method for manufacturing a screen according to claim 25 , wherein said specific wavelength or wavelengths having absorption properties includes the bright line peak of light from a fluorescent light.

35. A method for manufacturing a screen according to claim 25 , wherein said wavelength or wavelengths having absorption properties is arranged at the wavelengths between a wavelength of the bright line peak of red component and that of green component, and between a wavelength of the bright line peak of green component and that of blue component of a possible light source respectively.

36. A method for manufacturing a screen, said method comprising the steps of:

providing a diffuser panel; and

forming a selectively reflective layer which reflects light having a specific wavelength or wavelengths and absorbs light having a wavelength or wavelengths other than the specific wavelength or wavelengths,

wherein,

the step for forming a selectively reflective layer comprises forming, on the back surface of the diffuser panel, an optical multilayer-film including a dielectric film and a 5 nm to 20 nm thick light-absorbing thin film formed from a material having a refractive index of 1 or more and an absorption coefficient of 0.5 or more, and forming a metallic film on the optical multilayer film.

37. A method for manufacturing a screen according to claim 36 , wherein said optical multilayer film and said metallic film are formed by sputtering method.

38. A method for manufacturing a screen according to claim 36 , wherein said light-absorbing thin film is formed from a material selected from the group consisting of Nb, Nb alloys, C, Cr, Fe, Ge, Ni, Pd, Pt, Rh, Ti, TiN, TiN x W y , Mn, Ru, and PbTe.

39. A method for manufacturing a screen according to claim 36 , wherein said dielectric film is formed from a material selected from the group consisting of Nb 2 O 5 , TiO 2 , Ta 2 O 5 , Al 2 O 3 , and SiO 2 .

40. A method for manufacturing a screen according to claim 36 , wherein said metallic film is formed from a material selected from the group consisting of Al, Nb, or Ag, or an alloy thereof.

41. A method for manufacturing a screen according to claim 36 , wherein said specific wavelength or wavelengths includes respective wavelength or wavelengths for a red light, green light, and blue light.

42. A method for manufacturing a screen according to claim 36 , wherein said specific wavelength or wavelengths having absorption properties includes the bright line peak of light from a fluorescent light.

43. A method for manufacturing a screen according to claim 36 , wherein said wavelength or wavelengths having absorption properties is arranged at the wavelengths between a wavelength of the bright line peak of red component and that of green component, and between a wavelength of the bright line peak of green component and that of blue component of a possible light source respectively.