Backlight system with multilayer optical film reflector
First Claim
Patent Images
1. A backlight system comprising:
- a) a light guide defining a back surface;
b) a light source optically connected to the light guide, the light source emitting light into the light guide; and
c) a back reflector proximate the back surface of the light guide, the back reflector comprising a multilayer optical film which reflects at least about 80% of normal light and at least about 80% of light incident at an angle of 60 degrees from normal.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention includes a backlight system incorporating a back reflector and/or a lamp cavity reflector constructed of a multilayer optical film.
-
Citations
53 Claims
-
1. A backlight system comprising:
-
a) a light guide defining a back surface;
b) a light source optically connected to the light guide, the light source emitting light into the light guide; and
c) a back reflector proximate the back surface of the light guide, the back reflector comprising a multilayer optical film which reflects at least about 80% of normal light and at least about 80% of light incident at an angle of 60 degrees from normal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
-
-
24. A backlight system comprising:
-
a) a light guide defining a back surface;
b) a light source optically connected to the light guide, the light source emitting light into the light guide;
c) a back reflector proximate the back surface of the light guide, the back reflector comprising a multilayer optical film which reflects at least about 90% of normal light and at least about 80% of light incident at an angle of 60 degrees from normal; and
d) a lamp cavity reflector located about at least a portion of the light source, the lamp cavity reflector directing light from light source generally towards an edge of the light guide, the lamp cavity reflector further comprising the multilayer optical film. - View Dependent Claims (25)
-
-
44. A backlight system comprising:
-
a) a light guide defining a back surface;
b) a light source optically connected to the light guide, the light source emitting light into the light guide;
c) a back reflector proximate the back surface of the light guide, the back reflector comprising a multilayer optical film which reflects at least about 90% of normal light and at least about 80% of light incident at an angle of 60 degrees from normal, the multilayer optical film further comprising;
(1) a first layer comprising a biaxially oriented birefringent polymer, the first layer having an average thickness of not more than about 0.5 microns; and
(2) a second layer of a selected second polymer, each second layer having an average thickness of not more than 0.5 microns; and
d) a lamp cavity reflector located about at least a portion of the light source, the lamp cavity reflector directing light from light source generally towards an edge of the light guide, the lamp cavity reflector further comprising the multilayer optical film.
-
-
45. A backlight system comprising:
-
a) a light guide defining a back surface;
b) a light source optically connected to the light guide, the light source emitting light into the light guide; and
c) a lamp cavity reflector located about at least a portion of the light source, the lamp cavity reflector directing light from light source generally towards an edge of the light guide, the lamp cavity reflector further comprising a multilayer optical film which reflects at least about 80% of normal light and at least about 80% of light incident at an angle of 60 degrees from normal. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53)
-
Specification