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US 2007/0177071 A1Published application
Display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsYuji EGI, Tetsuji ISHITANI, Takeshi NISHI
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Abstract
To provide a display device having a high contrast ratio by a simple and easy method and to manufacture a high-performance display device at low cost, in a display device having a display element between a pair of light-transmitting substrates, layers each including a polarizer having different wavelength distribution of extinction coefficient from each other with respect to the absorption axes are stacked and provided on an outer side of the light-transmitting substrates. Further, a retardation plate may be provided between the stacked polarizers.
Claims28
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate or the second light-transmitting substrate;
- and
- a layer including stacked polarizers on an outer side of the first light-transmitting substrate or the second light-transmitting substrate,
- wherein the stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes, and
- the stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state.
3 more elements
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate and the second light-transmitting substrate;
- and
- a layer including stacked polarizers on an outer side of the first light-transmitting substrate or the second light-transmitting substrate;
- and
- a retardation plate provided between the layer including the stacked polarizers and the first light-transmitting substrate or the second light-transmitting substrate,
- wherein the stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes, and
- the stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state.
5 more elements
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate and the second light-transmitting substrate;
- a first layer including first stacked polarizers on an outer side of the first light-transmitting substrate;
- a second layer including second stacked polarizers on an outer side of the second light-transmitting substrate,
- wherein the first stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the second stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the first stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state, and
- the second stacked polarizers are arranged so that their absorption axes are in a parallel Nicols state.
5 more elements
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate and the second light-transmitting substrate;
- a first layer including first stacked polarizers on an outer side of the first light-transmitting substrate;
- a second layer including second stacked polarizers on an outer side of the second light-transmitting substrate;
- a first retardation plate between the first layer including the first stacked polarizers and the first light-transmitting substrate;
- a second retardation plate between the second layer including the second stacked polarizers and the second light-transmitting substrate,
- wherein the first stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the second stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the first stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state, and
- the second stacked polarizers are arranged so that their absorption axes are in a parallel Nicols state.
7 more elements
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate and the second light-transmitting substrate;
- a first layer including first stacked polarizers on an outer side of the first light-transmitting substrate;
- and
- a second layer including second stacked polarizers on an outer side of the second light-transmitting substrate,
- wherein the first stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the second stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the first stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state,
- the second stacked polarizers are arranged so that their absorption axes are in a parallel Nicols state,
- the first layer including the first stacked polarizers has a first polarizer and a second polarizer which are sequentially stacked from the first light-transmitting substrate side, and
- the first stacked polarizers and the second stacked polarizers are arranged so that their absorption axes are in a crossed Nicols state.
8 more elements
A display device comprising:
- a first light-transmitting substrate and a second light-transmitting substrate which are disposed to face each other;
- a display element sandwiched between the first light-transmitting substrate and the second light-transmitting substrate;
- a first layer including first stacked polarizers on an outer side of the first light-transmitting substrate;
- a second layer including second stacked polarizers on an outer side of the second light-transmitting substrate;
- a first retardation plate between the first light-transmitting substrate and the first layer including the first stacked polarizers;
- a second retardation plate between the second light-transmitting substrate and the second layer including the second stacked polarizers,
- wherein the first stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the second stacked polarizers have different wavelength distributions of extinction coefficients from each other with respect to absorption axes,
- the first stacked polarizers are arranged so that their absorption axes are deviated from a parallel Nicols state,
- the second stacked polarizers are arranged so that their absorption axes are in a parallel Nicols state,
- the first layer including the first stacked polarizers has a first polarizer and a second polarizer which are sequentially stacked from the first light-transmitting substrate side, and
- the first stacked polarizers and the second stacked polarizers are arranged so that their absorption axes are in a crossed Nicols state.
9 more elements
Dependencies are inferred from the claim text.