LOW COST OPTICAL FILM STACK
First Claim
1. A backlight assembly for a display having a polarized transmission axis comprising:
- a light source for emitting light;
a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from the light source;
a second brightness enhancement film having a plurality of prismatic elements extending in a second direction; and
a diffuser positioned to receive light exiting the first brightness enhancement film, wherein light exiting the diffuser enters the second brightness enhancement film.
1 Assignment
0 Petitions
Accused Products
Abstract
A rearview assembly for a vehicle includes a housing for attachment to the vehicle, a glass element disposed in the housing and a display disposed behind the mirror element in the housing. The display contains a light source for emitting light, a first brightness enhancement film having a first plurality of prismatic elements extending in a first direction and positioned to receive light emitted from the light source, a diffuser configured to transmit about 97% of light from the first brightness enhancing film, a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting the diffuser, and a display element disposed to receive light from the second brightness enhancement film with the display element having a second plurality of prismatic elements extending in a second direction. The first direction is substantially vertical and the second direction is substantially horizontal.
-
Citations
20 Claims
-
1. A backlight assembly for a display having a polarized transmission axis comprising:
-
a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from the light source; a second brightness enhancement film having a plurality of prismatic elements extending in a second direction; and a diffuser positioned to receive light exiting the first brightness enhancement film, wherein light exiting the diffuser enters the second brightness enhancement film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A display comprising:
-
a light source for emitting light; a first brightness enhancement film having a plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source; a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said first brightness enhancement film; and a diffuser having a transmissivity to light of about 97%, wherein the diffuser is disposed between the first brightness enhancing film and the second brightness enhancing film. - View Dependent Claims (13)
-
-
14. A rearview assembly for a vehicle comprising:
-
a housing for attachment to the vehicle; a glass element disposed in said housing; and a display disposed behind said glass element in said housing, said display comprising; a light source for emitting light; a first brightness enhancement film having a first plurality of prismatic elements extending in a first direction, and positioned to receive light emitted from said light source; a diffuser configured to transmit about 97% of light from the first brightness enhancing film; a second brightness enhancement film having a plurality of prismatic elements extending in a second direction and positioned to receive light exiting said diffuser; and a display element disposed to receive light from said second brightness enhancement film, said display element having a second plurality of prismatic elements extending in a second direction, wherein the first direction is substantially vertical and the second direction is substantially horizontal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification