Display device with stacked polarizers
First Claim
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1. A display device comprising:
- a first substrate;
a second substrate;
a first layer comprising a first liquid crystal element between the first substrate and the second substrate;
a stacked first polarizers;
a stacked second polarizers;
a transistor between the first layer and the second substrate;
a first electrode electrically connected to the transistor;
a second electrode;
a retardation plate;
a third substrate; and
a second layer including a second liquid crystal element between the retardation plate and the third substrate,a stacked third polarizers;
wherein the first substrate is interposed between the first layer and the stacked first polarizers,wherein the second substrate is interposed between the first layer and the stacked second polarizers,wherein the stacked first polarizers are arranged to be in a parallel Nicols state with each other,wherein the stacked second polarizers are arranged to be in a parallel Nicols state with each other,wherein the first liquid crystal element comprises a birefringent mode liquid crystal,wherein the first electrode and the second electrode are included into the layer,wherein a molecular orientation of the first liquid crystal element is controlled by a voltage between the first electrode and the second electrode,wherein the retardation plate is interposed between the stacked second polarizers and the second layer, andwherein the third substrate is interposed between the first layer and the stacked third polarizers.
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Abstract
An object of the present invention is to provide a display device having a high contrast ratio by a simple and easy method. Another object of the present invention is to manufacture such a display device having a high contrast ratio at low cost. The present invention relates to a display device including a first substrate; a second substrate; a layer including a display element, wherein the layer including the display element is interposed between the first substrate and the second substrate; and stacked polarizers on the outer side of the first substrate or the second substrate. The stacked polarizers are arranged to be in a parallel Nicols state and the wavelength distributions of the extinction coefficients of the stacked polarizers are different from each other.
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Citations
9 Claims
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1. A display device comprising:
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a first substrate; a second substrate; a first layer comprising a first liquid crystal element between the first substrate and the second substrate; a stacked first polarizers; a stacked second polarizers; a transistor between the first layer and the second substrate; a first electrode electrically connected to the transistor; a second electrode; a retardation plate; a third substrate; and a second layer including a second liquid crystal element between the retardation plate and the third substrate, a stacked third polarizers; wherein the first substrate is interposed between the first layer and the stacked first polarizers, wherein the second substrate is interposed between the first layer and the stacked second polarizers, wherein the stacked first polarizers are arranged to be in a parallel Nicols state with each other, wherein the stacked second polarizers are arranged to be in a parallel Nicols state with each other, wherein the first liquid crystal element comprises a birefringent mode liquid crystal, wherein the first electrode and the second electrode are included into the layer, wherein a molecular orientation of the first liquid crystal element is controlled by a voltage between the first electrode and the second electrode, wherein the retardation plate is interposed between the stacked second polarizers and the second layer, and wherein the third substrate is interposed between the first layer and the stacked third polarizers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsIshitani, Tetsuji, Nishi, Takeshi, Egi, Yuji
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Primary Examiner(s)Briggs, Nathanael R
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Application NumberUS13/559,755Publication NumberTime in Patent Office508 DaysField of Search349/96, 349/117, 359/485.04US Class Current349/96CPC Class CodesG02F 1/133528 PolarisersG02F 1/133531 characterised by the arrang...H10K 2102/3031 Two-side emission, e.g. tra...H10K 50/86 Arrangements for improving ...H10K 59/8791 Arrangements for improving ...
