General film compensated reflective liquid crystal display
First Claim
Patent Images
1. A liquid crystal display, comprising:
- a liquid crystal cell comprising a liquid crystal layer, and having a twisted angle φ and
a half residual phase α
;
a compensation film disposed on the liquid crystal cell, and having a phase retardation δ
in the range of (δ
0−
0.2π
)≦
δ
≦
(δ
0+0.2π
) and a slow axis angle θ
in the range of 0°
≦
θ
≦
180°
; and
a polarizer disposed on the compensation film and having a polarizer angle β
in the range of (β
020°
+n·
90°
)≦
β
≦
(β
0+20°
+n·
90°
);
wherein the phase retardation δ
0 satisfies the following relation;
wherein n is an integer with β
0 satisfies the following relation;
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Abstract
A liquid crystal display having at least one of high contrast ratio, high reflectance, and low color dispersion is disclosed. Based on the total boundary residual retardation, the corresponding compensation film and polar conditions may be calculated. Using the compensation film and polarizer conditions, a general film compensated reflective twisted-nametic liquid crystal display (GF-RTN-LCD) may be obtained.
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Citations
10 Claims
-
1. A liquid crystal display, comprising:
-
a liquid crystal cell comprising a liquid crystal layer, and having a twisted angle φ and
a half residual phase α
;
a compensation film disposed on the liquid crystal cell, and having a phase retardation δ
in the range of (δ
0−
0.2π
)≦
δ
≦
(δ
0+0.2π
) and a slow axis angle θ
in the range of 0°
≦
θ
≦
180°
; and
a polarizer disposed on the compensation film and having a polarizer angle β
in the range of (β
020°
+n·
90°
)≦
β
≦
(β
0+20°
+n·
90°
);
wherein the phase retardation δ
0 satisfies the following relation;
wherein n is an integer with β
0 satisfies the following relation;
- View Dependent Claims (2, 3, 4, 5, 6, 10)
-
-
7. A liquid crystal display, comprising:
-
a liquid crystal cell comprising a first substrate, an opposing reflective substrate, and a liquid crystal layer interposed therebetween, the liquid crystal layer having a twisted angle φ and
a half residual phase α
;
the liquid crystal layer comprising a middle layer and at least one boundary layer, wherein a total residual phase of the liquid crystal cell satisfies the following relation α
=2π
·
ψ
/λ
;
wherein ψ
is a residual retardation of each boundary sub-layer and λ
is a wavelength of light;
a compensation film disposed on the liquid crystal cell, and having a phase retardation δ
in the range of (δ
0−
0.2π
)≦
δ
≦
(δ
0+0.2π
) and a slow axis angle θ
in the range of 0°
≦
θ
≦
180°
; and
a polarizer disposed on the compensation film and having a polarizer angle β
in the range of (β
0−
20°
+n·
90°
)≦
β
≦
(β
0+20°
+n×
90°
);
wherein the phase retardation δ
satisfies the following relation;
wherein n is an integer with β
0 satisfies the following relation;
- View Dependent Claims (8, 9)
-
Specification
-
- Resources
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Current AssigneeInnoLux Corporation, University of Central Florida (State University System of Florida)
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Original AssigneeTPO Displays Corporation (InnoLux Corporation)
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InventorsWu, Shin-Tson, Zhu, Xinyu
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current349/117
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CPC Class CodesG02F 1/13363 Birefringent elements, e.g....G02F 2413/01 Number of plates being 1G02F 2413/08 with a particular optical a...
