Transflective LCD display device comprising a patterned polarizer, display having the same, and method having the same
First Claim
Patent Images
1. A transflective liquid crystal display (LCD) device, comprising:
- a liquid crystal display cell including an active layer;
a backlight system to provide backlight to the display cell;
a partial mirror for reflecting ambient light, provided with apertures for passing light originating from the backlight system; and
polarizing means comprising a patterned polarizer between the active layer and the backlight system, said patterned polarizer extending substantially over an area of said apertures in said partial mirror, the patterned polarizer being patterned to expose a portion of the partial mirror.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a transflective LCD incorporating a partial mirror (224) as the transflector. In the transmissive display mode, light from a backlight system (240) passes apertures (226) in the transflector (224). According to the invention, recycling of light to the backlight system (240) is improved by substantially only polarizing light that passes an aperture. This is achieved by means of a patterned polarizer (222) extending over the apertures in the partial mirror.
-
Citations
20 Claims
-
1. A transflective liquid crystal display (LCD) device, comprising:
-
a liquid crystal display cell including an active layer; a backlight system to provide backlight to the display cell; a partial mirror for reflecting ambient light, provided with apertures for passing light originating from the backlight system; and polarizing means comprising a patterned polarizer between the active layer and the backlight system, said patterned polarizer extending substantially over an area of said apertures in said partial mirror, the patterned polarizer being patterned to expose a portion of the partial mirror. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A display comprising:
-
a liquid crystal layer; an at least partially reflective layer to reflect ambient light, the at least partially reflective layer disposed between the liquid crystal layer and a backlight module, the partially reflective layer having apertures to pass backlight from the backlight module to the liquid crystal layer; and a patterned polarizer disposed between the liquid crystal layer and the backlight module, the patterned polarizer extending substantially over an area of the apertures in the partially reflective layer, the patterned polarizer being patterned to expose a portion of the partially reflective layer. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A method of operating a liquid crystal display, the method comprising:
-
providing backlight from a backlight module; passing a first portion of the backlight through apertures in an at least partially reflective layer positioned between the backlight module and a liquid crystal layer; passing the first portion of the backlight through a patterned polarizer that extends substantially over the apertures, the patterned polarizer being patterned to expose the partially reflective layer; and transmitting a second portion of the backlight from the backlight module to the partially reflective layer, and reflecting the second portion of the backlight by using the exposed portion of the partially reflective layer without passing the second portion of the backlight through the patterned polarizer. - View Dependent Claims (19, 20)
-
Specification