HIGH-SHIELDING REFLECTIVE FILM AND METHOD FOR MANUFACTURING THE SAME

• US 20120100353A1
• Filed: 10/22/2010
• Published: 04/26/2012
• Est. Priority Date: 10/22/2010
• Status: Active Grant

• Current Assignee: Polyfilm Optronics Corporation
• Original Assignee: Extend Optronics Corp.
• Inventors: CHANG, JEN-HUAI, LIN, CHAO-YING
• Granted Patent: US 8,703,280 B2
• Time in Patent Office: Days
• US Class Current: 428/212
• CPC Class Codes: B32B 2038/0028 Stretching, elongating
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2250/42 Alternating layers, e.g. ABAB(C), AABBAABB(C)
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2307/516 mono-axially
• CPC Class Codes: B32B 2307/706 Anisotropic
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 37/12 characterised by using adhesives
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: G02B 5/0825 the reflecting layers comprising dielectric materials only
• CPC Class Codes: G02B 5/206 comprising particles embedded in a solid matrix
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

Provided is a high-shielding reflective film, and its manufacturing method. This film is fabricated from an optical reflective film and a polarizer. The optical reflective film and the polarizer are combined by a means of a specific scheme. The optical reflective film is formed by stacking multiple layers of dielectric optical interference films with different materials. The optical reflective film particularly applies a principle of optical interference to reflect the most of the incident light, and allow some transmission. The polarizer is to absorb half of the incident light, and allow the other half to pass through. Since the characteristics of reflection between the reflective film and the polarizer are different, the reflectance difference therefor may increase. By which, the high-shielding reflective film achieves a one-way mirror with anti-peep effect since it substantially increases the reflectance difference among the incident lights from the various directions.

Claims

1. A high-shielding reflective film, comprising:

an optical-reflective film composed of multiple stacked dielectric optical films with different materials;

a polarizer capable of absorbing part of incident light and generating a polarization state; and

an adhesive layer combining the optical-reflective film and the polarizer.

2. The high-shielding reflective film of claim 1, wherein the optical-reflective film is formed by stacking two or more different materials and at least one material has a different refractive index along a different orientation axis, and is optically anisotropic.

3. The high-shielding reflective film of claim 1, where in the adhesive layer, a plurality of polymer light-diffusion particles, metal particles, metal particles, metal-oxide particles, or an ultraviolet absorber is added.

4. The high-shielding reflective film of claim 1, wherein the polarizer includes an anti-reflection coating or a low-reflection coating.

5. The high-shielding reflective film of claim 1, wherein the polarizer has 1%˜

15% average reflectance from 400 nm˜

700 nm non-polarized light.

6. The high-shielding reflective film of claim 1, wherein the polarizer has 30%˜

60% average transmittance from 400 nm˜

700 nm non-polarized light.

7. The high-shielding reflective film of claim 1, wherein the optical-reflective film has 30%˜

70% average reflectance from 400 nm˜

700 nm non-polarized light.

8. The high-shielding reflective film of claim 1, wherein the optical-reflective film has 30%˜

70% average transmittance from 400 nm˜

700 nm non-polarized light.

9. The high-shielding reflective film of claim 1, wherein the high-shielding reflective film has 30%˜

70% average transmittance from 400 nm˜

700 nm non-polarized light.

10. The high-shielding reflective film of claim 1, wherein two sides of the high-shielding reflective film have a ratio of average reflectance 3 to 50 from 400 nm˜

700 nm non-polarized light.

11. The high-shielding reflective film of claim 1, wherein two sides of the high-shielding reflective film have a ratio of average reflectance 3 to 17 from 400 nm˜

700 nm non-polarized light.

12. A method for manufacturing the high-shielding reflective film according to claim 1, comprising:

preparing an optical-reflective film, which is composed of multiple stacked dielectric optical films with different materials;

preparing a transparent plastic plate with rich chemical activity;

dipping the transparent plastic plate into an iodine solution, and the solution'"'"'s iodine ions are diffused and permeated into interior of the transparent plastic plate;

heating;

performing a stretching process, and inside the transparent plastic plate, a plurality of molecules with any angle and irregular distribution are stretched to deflect to a uniform orientation along the direction of stretching force, and drive the iodine molecules attached with the transparent plastic plate to the same direction, and the transparent plastic plate is formed as a polarizer;

adjusting an alignment axis of the polarizer according to the alignment axis of the optical-reflective film; and

forming the high-shielding reflective film by combining the polarizer and the optical-reflective film through an adhesive layer.

13. The method of claim 12, wherein the transparent plastic plate is made of polyvinyl alcohol.

14. The method of claim 13, further comprising two transparent substrates made of three-cellulose-acetate films, which are adhered to two sides of the transparent plastic plate after the stretching process.

15. The method of claim 14, wherein the three-cellulose-acetate film is adhered to the transparent plastic plate through a surface treatment.

16. The method of claim 12, wherein the polarizer and the optical-reflective film are combined with a pressure, heat curing or UV curing.

17. A high-shielding reflective film, comprising:

an optical-reflective film composed of multiple stacked dielectric optical films with different materials;

a polarizer capable of absorbing part of incident light and generating a polarization state;

an adhesive layer combining the optical-reflective film and the polarizer; and

a transparent substrate, providing a mechanical rigidity for load bearing the optical-reflective film or the polarizer, and being combined with the optical-reflective film or the polarizer via another adhesive layer.

18. The high-shielding reflective film of claim 17, wherein the optical-reflective film is formed by stacking two or more different materials and at least one material has a different refractive index along a different orientation axis, and is optically anisotropic.

19. The high-shielding reflective film of claim 17, where in the adhesive layer, a plurality of polymer light-diffusion particles, metal particles, metal particles, or metal-oxide particles is added.

20. The high-shielding reflective film of claim 17, wherein the polarizer includes an anti-reflection coating or a low-reflection coating.

21. The high-shielding reflective film of claim 17, where in the functional additive is ultraviolet absorber, infrared absorber, metal particles, or metal-oxide particles.

22. A method for manufacturing the high-shielding reflective film as recited in claim 17, comprising:

preparing an optical-reflective film, which is composed of multiple stacked dielectric optical films with different materials;

preparing a transparent plastic plate with rich chemical activity;

dipping the transparent plastic plate into an iodine solution, and the solution'"'"'s iodine ions are diffused and permeated into interior of the transparent plastic plate;

heating;

performing a stretching process, and inside the transparent plastic plate, a plurality of molecules with any angle and irregular distribution are stretched to deflect to a uniform orientation along the direction of stretching force, and drive the iodine molecules attached with the transparent plastic plate to the same direction, and the transparent plastic plate is formed as a polarizer;

adjusting an alignment axis of the polarizer according to the alignment axis of the optical-reflective film;

combining the polarizer and the optical-reflective film through an adhesive layer; and

forming the high-shielding reflective film by further adhering a transparent substrate with the combination of the polarizer, the optical-reflective film and the adhesive layer via another adhesive layer.

23. A high-shielding reflective film adapted to a cavity, comprising:

an optical-reflective film composed of multiple stacked dielectric optical films with different materials;

a polarizer capable of absorbing part of incident light and generating a polarization state;

an adhesive layer combining the optical-reflective film and the polarizer; and

a transparent substrate, providing a mechanical rigidity for load bearing the optical-reflective film or the polarizer, and being combined with the optical-reflective film or the polarizer via another adhesive layer;

wherein, the high-shielding reflective film is combined with a transparent area of the cavity via the transparent substrate, and the cavity includes the transparent area and an opaque area.

24. The high-shielding reflective film of claim 23, wherein, a ratio of reflective indexes of two sides of the optical-reflective film is around 3 to 50 as the light reaches the optical-reflective film, wherein the ratio of reflective indexes is obtained by dividing a high reflective index by a low reflective index.

25. The high-shielding reflective film of claim 23, wherein, a ratio of reflective indexes of two sides of the optical-reflective film is around 3 to 17 as the light reaches the optical-reflective film, wherein the ratio of reflective indexes is obtained by dividing a high reflective index by a low reflective index.