NORMALLY BLACK TRANSFLECTIVE LIQUID CRYSTAL DISPLAYS
First Claim
1. A transflective liquid crystal display comprising a plurality of unit structures, each unit structure comprising:
- a reflective part, comprising;
first portions of a first polarizing layer, a second polarizing layer, a first substrate layer, and a second substrate layer, wherein the second substrate layer is opposite to the first substrate layer;
a first common electrode portion;
a reflective electrode;
an over-coating layer adjacent to one of the first substrate layer and the second substrate layer;
a reflective layer adjacent to the first substrate layer;
a half-wave retardation film;
wherein the first substrate layer and the second substrate layer are between the first polarizing layer and the second polarizing layer;
a first liquid crystal layer portion of a liquid crystal layer between the first substrate layer and the second substrate layer, wherein liquid crystal molecules in the first liquid crystal layer portion is substantially homogeneously aligned along a direction in a voltage-off state;
a transmissive part, comprising;
second portions of the first polarizing layer, the second polarizing layer, the first substrate layer, and the second substrate layer;
a second liquid crystal layer portion of the liquid crystal layer between the first substrate layer and the second substrate layer;
a second common electrode portion; and
a transmissive electrode;
wherein a cell gap of the first liquid crystal layer portion is different from a cell gap of the second liquid crystal layer portion;
wherein liquid crystal molecules in the second liquid crystal layer portion is substantially homogeneously aligned along a second direction in the voltage-off state.
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Accused Products
Abstract
Techniques are provided for normally black multi-mode LCDs using homogeneously aligned liquid crystal materials which optical birefringence is electrically controllable. A light recycling/redirecting film may be added between a BLU and a nearby polarization layer to recycle backlight from a reflective part of an LCD unit structure into a transmissive part of the same structure to increase the optical output efficiency of the BLU. Electrodes for the transmissive part and the reflective part may be separately driven in various operating modes. Benefits include high transmittance, high reflectance, wide view angles, improved optical recycling efficiency, and low manufacturing costs.
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Citations
40 Claims
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1. A transflective liquid crystal display comprising a plurality of unit structures, each unit structure comprising:
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a reflective part, comprising; first portions of a first polarizing layer, a second polarizing layer, a first substrate layer, and a second substrate layer, wherein the second substrate layer is opposite to the first substrate layer;
a first common electrode portion;
a reflective electrode;
an over-coating layer adjacent to one of the first substrate layer and the second substrate layer;
a reflective layer adjacent to the first substrate layer;
a half-wave retardation film;wherein the first substrate layer and the second substrate layer are between the first polarizing layer and the second polarizing layer; a first liquid crystal layer portion of a liquid crystal layer between the first substrate layer and the second substrate layer, wherein liquid crystal molecules in the first liquid crystal layer portion is substantially homogeneously aligned along a direction in a voltage-off state; a transmissive part, comprising; second portions of the first polarizing layer, the second polarizing layer, the first substrate layer, and the second substrate layer; a second liquid crystal layer portion of the liquid crystal layer between the first substrate layer and the second substrate layer; a second common electrode portion; and a transmissive electrode; wherein a cell gap of the first liquid crystal layer portion is different from a cell gap of the second liquid crystal layer portion; wherein liquid crystal molecules in the second liquid crystal layer portion is substantially homogeneously aligned along a second direction in the voltage-off state. - 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, 24, 25)
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26. A computer, comprising:
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one or more processors; a transflective liquid crystal display coupled to the one or more processors and comprising a plurality of unit structures, a unit structure comprising; a reflective part, comprising; first portions of a first polarizing layer, a second polarizing layer, a first substrate layer, and a second substrate layer, wherein the second substrate layer is opposite to the first substrate layer;
a first common electrode portion;
a reflective electrode;
an over-coating layer adjacent to one of the first substrate layer and the second substrate layer;
a reflective layer adjacent to the first substrate layer;
a half-wave retardation film;wherein the first substrate layer and the second substrate layer are between the first polarizing layer and the second polarizing layer; a first liquid crystal layer portion of a liquid crystal layer between the first substrate layer and the second substrate layer, wherein liquid crystal molecules in the first liquid crystal layer portion is substantially homogeneously aligned along a direction in a voltage-off state; a transmissive part, comprising; second portions of the first polarizing layer, the second polarizing layer, the first substrate layer, and the second substrate layer; a second liquid crystal layer portion of the liquid crystal layer between the first substrate layer and the second substrate layer; a second common electrode portion; and a transmissive electrode; wherein a cell gap of the first liquid crystal layer portion is different from a cell gap of the second liquid crystal layer portion; wherein liquid crystal molecules in the second liquid crystal layer portion is substantially homogeneously aligned along a second direction in the voltage-off state. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of fabricating a transflective liquid crystal display, comprising:
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providing a plurality of unit structures, a unit structure comprising; a reflective part, comprising; first portions of a first polarizing layer, a second polarizing layer, a first substrate layer, and a second substrate layer, wherein the second substrate layer is opposite to the first substrate layer;
a first common electrode portion;
a reflective electrode;
an over-coating layer adjacent to one of the first substrate layer and the second substrate layer;
a reflective layer adjacent to the first substrate layer;
a half-wave retardation film;wherein the first substrate layer and the second substrate layer are between the first polarizing layer and the second polarizing layer; a first liquid crystal layer portion of a liquid crystal layer between the first substrate layer and the second substrate layer, wherein liquid crystal molecules in the first liquid crystal layer portion is substantially homogeneously aligned along a direction in a voltage-off state; a transmissive part, comprising; second portions of the first polarizing layer, the second polarizing layer, the first substrate layer, and the second substrate layer; a second liquid crystal layer portion of the liquid crystal layer between the first substrate layer and the second substrate layer; a second common electrode portion; and a transmissive electrode; wherein a cell gap of the first liquid crystal layer portion is different from a cell gap of the second liquid crystal layer portion; wherein liquid crystal molecules in the second liquid crystal layer portion is substantially homogeneously aligned along a second direction in the voltage-off state. - View Dependent Claims (39, 40)
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Specification