Transflective liquid crystal display
First Claim
1. A transflective liquid crystal display, comprising:
- a lower polarizer and an upper polarizer facing each other;
a liquid crystal cell generally between the lower and upper polarizers; and
a multilayer optical film disposed between the lower polarizer and the liquid crystal cell, the multilayer optical film having a transmissive axis and a reflective axis;
wherein light polarized parallel to the transmissive axis can transmit through the multilayer optical film, and light polarized parallel to the reflective axis can be reflected by the multilayer optical film.
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Accused Products
Abstract
A transflective liquid crystal display includes a lower polarizer (100) and an upper polarizer (101) facing each other, a liquid crystal cell (200) generally between the lower and upper polarizers, and a multilayer optical film (300) disposed between the lower polarizer and the liquid crystal cell. The multilayer optical film has a transmissive axis and a reflective axis. The light polarized parallel to the transmissive axis can transmit through the multilayer optical film, and light polarized parallel to the reflective axis can be reflected by the multilayer optical film. Thus, the TR-LCD, in transmissive mode, the polarized light that is from the backlight and passes the lower polarizer is completely useful. And in reflective mode, the polarized light from ambient and passing the upper polarizer is completely useful. That is, the efficiency of utilization of light is high.
7 Citations
11 Claims
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1. A transflective liquid crystal display, comprising:
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a lower polarizer and an upper polarizer facing each other;
a liquid crystal cell generally between the lower and upper polarizers; and
a multilayer optical film disposed between the lower polarizer and the liquid crystal cell, the multilayer optical film having a transmissive axis and a reflective axis;
wherein light polarized parallel to the transmissive axis can transmit through the multilayer optical film, and light polarized parallel to the reflective axis can be reflected by the multilayer optical film. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transflective liquid crystal display, comprising:
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a lower polarizer and an upper polarizer facing each other;
a liquid crystal cell generally between the lower and upper polarizers; and
a multilayer optical film disposed between the lower polarizer and the liquid crystal cell, the multilayer optical film comprising a plurality of first layers and second layers alternately stacked on each other, and defining an optical axis;
wherein the first and second layers have a same refractive index according to light polarized parallel to the optical axis, and the first layers have a refractive index different from that of the second layers according to light polarized perpendicular to the optical axis. - View Dependent Claims (8, 9, 10)
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11. A transflective liquid crystal display, comprising:
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a lower polarizer and an upper polarizer facing each other;
a liquid crystal cell generally between the lower and upper polarizers; and
a multilayer optical film disposed between the lower polarizer and the liquid crystal cell, the multilayer optical film having a transmissive axis and a reflective axis;
wherein the transmissive axis is parallel to an optical axis of the lower polarizer while the reflective axis is parallel to an optical axis of the upper polarizer.
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Specification