Optical film for preventing optical coupling
First Claim
1. An optical construction comprising first and second optical layers having first and second major surfaces facing each other and being separated by an air gap, the first and second surfaces being susceptible to physically contacting each other at a location in the air gap, the optical construction comprising an optical film disposed at the location to prevent the first and second major surfaces from contacting each other at the location, the optical film having an effective index of refraction that is not greater than about 1.3.
1 Assignment
0 Petitions
Accused Products
Abstract
Optical constructions are disclosed. A disclosed optical construction includes first and second optical layers having first and second major surfaces that face each other and are separated by an air gap. The first and second surfaces are susceptible to physically contacting each other at a location in the air gap. The optical construction further includes an optical film that is disposed at the location to prevent the first and second major surfaces from contacting each other at the location. The optical film has an effective index of refraction that is not greater than about 1.3.
131 Citations
24 Claims
- 1. An optical construction comprising first and second optical layers having first and second major surfaces facing each other and being separated by an air gap, the first and second surfaces being susceptible to physically contacting each other at a location in the air gap, the optical construction comprising an optical film disposed at the location to prevent the first and second major surfaces from contacting each other at the location, the optical film having an effective index of refraction that is not greater than about 1.3.
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6. An optical assembly comprising:
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a first optical layer; an optical construction comprising; a second optical layer; and an optical film disposed between the first and second optical layers and having an effective index of refraction that is not greater than about 1.3, wherein substantial portions of each two neighboring major surfaces of the second optical layer and the optical film in the optical construction are in physical contact with each other; and an air gap disposed between the first optical layer and the optical construction, such that when the first optical layer is brought into physical contact with the optical film, no optical coupling occurs between the first and second optical layers. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A display system comprising:
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a light source; a liquid crystal panel receiving light from the light source; a first major surface of a first optical layer disposed between the liquid crystal panel and the light source; a second major surface of a second optical layer disposed between the first major surface and the light source; an air gap separating the first and second major surfaces; and an optical film disposed between the first and second major surfaces for preventing the two major surfaces from physically contacting each other, the optical film comprising a binder, a plurality of particles and a plurality of interconnected voids. - View Dependent Claims (20, 21)
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22. A light source comprising:
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a lightguide; one or more lamps disposed along an edge of the light guide; and an optical film disposed on at least a portion of the lightguide for preventing optical loss when the lightguide comes into physical contact with an object, the optical film having a thickness that is not less than about 1 micron, and an effective index of refraction that is not greater than about 1.3. - View Dependent Claims (23, 24)
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Specification