Optical film with defect-reducing surface and method for making same
First Claim
1. An optical film comprising:
- a first surface free of primary regular structure, the first surface replicated with a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range;
a second surface opposing the first surface;
a second light management film contactable to the first surface;
a light source to generate light incident on the first surface and the second film; and
a light gating device disposed to receive light transmitted by the first surface and the second film;
wherein the local maxima have actual heights and the characteristic measure is one of i) a difference between the actual heights and a nominal height ii) slope angle of the first surface proximate a local maximum.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical film has surface that reduces the occurrence of optical defects in a display using the film. In particular, the surface has randomized characteristics that reduce such defects as wet-out, Newton'"'"'s rings, and Moiré effects. The film has a first surface free of regular structure, the first surface having a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range. The film also has a second surface opposing the first surface. A method of making an optical film includes embossing a pattern lacking regular structure onto a first surface of a film, wherein the first surface has a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range. The characteristic measure may be a difference between the actual heights and a nominal height of the film surface, average separation between the local height maxima on the surface, or slope angle of the first surface proximate a local height maximum.
-
Citations
63 Claims
-
1. An optical film comprising:
-
a first surface free of primary regular structure, the first surface replicated with a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range;
a second surface opposing the first surface;
a second light management film contactable to the first surface;
a light source to generate light incident on the first surface and the second film; and
a light gating device disposed to receive light transmitted by the first surface and the second film;
wherein the local maxima have actual heights and the characteristic measure is one of i) a difference between the actual heights and a nominal height ii) slope angle of the first surface proximate a local maximum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An optical film comprising:
-
an anti-wet-out surface replicated on a first surface having no primary regularly refractive structure; and
a second surface, having a primary regularly structured refracting surface, opposing the first surface. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An optical film, comprising:
-
a first surface;
replicated wet-out reducing means disposed on the first surface for reducing wet-out between the first surface and another optical surface; and
wet out reducing means disposed on the second surface. - View Dependent Claims (25)
-
-
26. An optical device, comprising:
-
a light source;
a film having an anti-wet-out surface replicated on a first surface having no primary regularly refractive structure; and
a second optical component having a second surface opposing the first surface;
wherein light from the light source passes through the film and the second optical component. - View Dependent Claims (27, 28, 29)
-
-
30. An optical film comprising:
-
an anti-wet-out surface free of primary, regular refractive structure, the anti-wet-out surface having a plurality of local height maxima, a characteristic measure of the first surface having a quasi-random value within a predetermined range, the characteristic value having a first degree of order when measured relative to a first axis in a plane of the film, and a second degree of order different from the first degree of order when measured relative to a second axis in the plane of the film orthogonal to the first axis; and
a second surface opposing the first surface. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
-
43. An optical film comprising:
-
a first surface free of primary regular structure, the first surface replicated with a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range; and
a second surface opposing the first surface;
wherein the local maxima have actual heights and the characteristic measure is an average separation between the local height maxima, and the predetermined range is from 50 μ
m to 500 μ
m.- View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51)
-
-
52. An optical film comprising:
-
a first surface free of primary regular structure, the first surface replicated with a plurality of local height maxima, a characteristic measure of the first surface having a random value within a predetermined range;
wherein the optical film is polarization sensitive and local maxima have actual heights and the characteristic measure is one of i) a difference between the actual heights and a nominal height ii) slope angle of the first surface proximate a local maximum. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
-
Specification