DISPLAY DEVICE
First Claim
Patent Images
1. A display device comprising:
- a first light-transmissive substrate and a second light-transmissive substrate opposed to each other;
a display element disposed between the first and second light-transmissive substrates; and
stacked polarizing plates adjacent to the first light-transmissive substrate wherein the first light-transmissive substrate is located between the display element and the stacked polarizing plates, wherein absorption axes of the stacked polarizing plates are arranged in a parallel nicol state.
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Accused Products
Abstract
The invention provides a display device of which a contrast ratio is enhanced. By providing stacked polarizing plates so as to be in a cross nicol state, a contrast ratio of a display device can be enhanced. The stacked polarizing plates are stacked outside a light-transmissive insulating substrate in a parallel nicol state. When the number of polarizing plates is four or five in total, a contrast ratio becomes the highest.
93 Citations
32 Claims
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1. A display device comprising:
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a first light-transmissive substrate and a second light-transmissive substrate opposed to each other;
a display element disposed between the first and second light-transmissive substrates; and
stacked polarizing plates adjacent to the first light-transmissive substrate wherein the first light-transmissive substrate is located between the display element and the stacked polarizing plates, wherein absorption axes of the stacked polarizing plates are arranged in a parallel nicol state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A display device comprising:
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a first light-transmissive substrate and a second light-transmissive substrate opposed to each other;
a display element disposed between the first and second light-transmissive substrates;
first stacked polarizing plates adjacent to the first light-transmissive substrate wherein the first light-transmissive substrate is located between the display element and the first stacked polarizing plates;
second stacked polarizing plates adjacent to the second light-transmissive substrate wherein the second light-transmissive substrate is located between the display element and the second stacked polarizing plates, wherein absorption axes of the first stacked polarizing plates are arranged in a parallel nicol state, wherein absorption axes of the second stacked polarizing plates are arranged in a parallel nicol state, and wherein the absorption axes of the first stacked polarizing plates are arranged relative to the absorption axes of the second stacked polarizing plates in a cross nicol state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A display device comprising:
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a first light-transmissive substrate and a second light-transmissive substrate opposed to each other;
a display element disposed between the first and second light-transmissive substrates;
m first polarizing plates stacked adjacent to the first light-transmissive substrate wherein the first light-transmissive substrate is located between the display element and the first polarizing plates; and
n second polarizing plates stacked adjacent to the second light-transmissive substrate wherein the second light-transmissive substrate is located between the display element and the second polarizing plates, wherein absorption axes of the first polarizing plates are arranged in a parallel nicol state, wherein absorption axes of the second polarizing plates are arranged in a parallel nicol state, wherein the absorption axes of the first polarizing plates are arranged relative to the absorption axes of the second polarizing plates in a cross nicol state such that the display device has a third transmittance, wherein a ratio between a first transmittance and a second transmittance is smaller than a ratio between the third transmittance and a fourth transmittance, wherein the first transmittance is associated with an arrangement having m first polarizing plates and n second polarizing plates arranged such that the absorption axes of the first polarizing plates are arranged relative to the absorption axes of the second polarizing plates in a parallel nicol state, wherein the second transmittance is associated with an arrangement having m−
1 first polarizing plates and n second polarizing plates arranged such that the absorption axes of the first polarizing plates are arranged relative to the absorption axes of the second polarizing plates in a parallel nicol state,wherein the fourth transmittance is associated with an arrangement having m−
1 first polarizing plates and n second polarizing plates arranged such that the absorption axes of the first polarizing plates are arranged relative to the absorption axes of the second polarizing plates in a cross nicol state, andwherein n and m are integers having values of two or more. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A display device comprising:
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a first light-transmissive substrate and a second light-transmissive substrate opposed to each other;
a display element disposed between the first and second light-transmissive substrates;
first stacked polarizing plates adjacent to the first light transmissive substrate wherein the first light-transmissive substrate is located between the display element and the first stacked polarizing plates;
second stacked polarizing plates adjacent to the second light-transmissive substrate wherein the second light-transmissive substrate is located between the display element and the second stacked polarizing plates, wherein absorption axes of the first stacked polarizing plates are arranged in a parallel nicol state, wherein absorption axes of the second stacked polarizing plates are arranged in a parallel nicol state, wherein the absorption axes of the first stacked polarizing plates are arranged relative to the absorption axes of the second stacked polarizing plates in a cross nicol state, wherein a ratio of a first transmittance to a second transmittance is higher than a ratio of a third transmittance to a fourth transmittance, wherein the first transmittance is associated with an arrangement having the first stacked polarizing plates and the second stacked polarizing plates arranged such that the absorption axes of the first stacked polarizing plates are arranged relative to the absorption axes of the second stacked polarizing plates in a parallel nicol state, wherein the second transmittance is associated with an arrangement having the first stacked polarizing plates and the second stacked polarizing plates arranged such that the absorption axes of the first stacked polarizing plates are arranged relative to the absorption axes of the second stacked polarizing plates in a cross nicol state, wherein the third transmittance is associated with an arrangement having a first single-layer polarizing plate and a second single-layer polarizing plate arranged such that absorption axes of the first single-layer polarizing plate are arranged relative to absorption axes of the second polarizing plate in a parallel nicol state, and wherein the fourth transmittance is associated with an arrangement having the first single-layer polarizing plate and the second single-layer polarizing plate arranged such that the absorption axes of the first single-polarizing plate are arranged relative to the absorption axes of the second single-layer polarizing plate in a cross nicol state. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification