Visible light-reflecting member
View Patent ↗A visible light-reflecting member is disclosed which uses a plate or a film for reflecting visible lights, whose reflective surface is provided with an aluminum thin film having an aluminum purity of not less than 99 mass % and an X-ray diffraction pattern wherein, among peak intensities ascribed to aluminum, the peak intensity ascribed to the (111) plane is higher than the total of the other peak intensities.
1. A visible light reflecting member using a plate or a film for visible light reflection, said plate or film having a reflective surface provided with an aluminum thin film in which a purity of aluminum is 99 mass % or more and, among peaks attributed to the aluminum in X-ray diffraction, the peak intensity attributed to (111) planes being higher than the total of the other peak intensities attributed to the aluminum, said plate or film having a Fresnel structure formed on said reflective surface.
2. A visible light reflecting member having substantially flat or curved surface portions with a surface roughness (Ra) of 40 nm or less on a reflective surface thereof and using an aluminum thin film for visible light reflection, said reflective surface being formed on a substrate having a Fresnel structure.
3. A visible light reflecting member according to claim 1 , wherein said aluminum thin film is provided on a substrate made of a plastic material.
4. A visible light reflecting member according to claim 3 , wherein an oxide coating film is directly formed on a surface of said aluminum thin film by plasma oxidation.
5. A visible light reflecting member according to claim 1 , wherein an oxide coating film of 100 nm or less is directly formed on a surface of said aluminum thin film.
6. A visible light reflecting member according to claim 5 , wherein said oxide coating film formed contains a very small amount of a noble gas component.
7. A method of manufacturing visible light reflecting member comprising the steps of applying a potential of −60V to −5V to a substrate in the form of a plate or a film to be formed thereon with an aluminum thin film and irradiating ions with a low energy of 80 eV to 15 eV, thereby forming the aluminum thin film by a sputtering method, said substrate having a Fresnel structure on which said aluminum thin film is formed.
8. A method of manufacturing visible light reflecting member according to claim 7 , further comprising the step of forming an oxide coating film of 100 nm or less by the use of radical oxygen directly on a surface of said aluminum thin film formed.
9. A method of manufacturing an aluminum thin film visible light reflecting member comprising the steps of:
forming an aluminum thin film on a substrate in the form of a plate or a film, said substrate having a Fresnel structure on which the aluminum film is formed; and
oxidizing said aluminum thin film by the use of oxygen radicals produced by a plasma in a noble gas containing a small amount of oxygen, thereby forming an oxide film on a surface of said aluminum thin film.
10. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 1 is incorporated into a backlight unit.
11. A visible light reflecting member according to claim 2 , wherein said aluminum thin film is provided on a substrate made of a plastic material.
12. A visible light reflecting member according to claim 11 , wherein an oxide coating film is directly formed on a surface of said aluminum thin film by plasma oxidation.
13. A visible light reflecting member according to claim 2 , wherein an oxide coating film of 100 nm or less is directly formed on a surface of said aluminum thin film.
14. A visible light reflecting member according to claim 13 , wherein said oxide coating film formed contains a very small amount of a noble gas component.
15. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 2 is incorporated into a backlight unit.
16. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 3 is incorporated into a backlight unit.
17. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 4 is incorporated into a backlight unit.
18. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 5 is incorporated into a backlight unit.
19. A large-size flat panel liquid crystal display having a screen diagonal of 28 inches or more, wherein the visible light reflecting member according to claim 6 is incorporated into a backlight unit.