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US 2003/0169380 A1Published application
Liquid crystal display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorTatsuya Arao
Life of this patent
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Abstract
A liquid crystal layer is provided between a pair of substrates, one of the pair of substrates is provided with a pixel region including a TFT and a light shielding layer in which an opening portion is formed, a semiconductor layer composing the TFT is overlapped with the light shielding layer and formed along one side of the opening portion, and an alignment of a liquid crystal molecule is controlled such that light which transmits through the liquid crystal layer is incident as polarized light perpendicular to the one side of the opening portion. The liquid crystal layer is particularly made of more a TN mode liquid crystal.
Claims15
A liquid crystal display device comprising:
- a pair of substrates;
- and
- a liquid crystal layer provided between the pair of substrates, wherein one of the pair of substrates comprises:
- a pixel region including a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed along one side of the opening portion,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, an alignment of a liquid crystal molecule in the liquid crystal layer is controlled such that light which transmits through the liquid crystal layer and is incident into the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
2 more elements
A liquid crystal display device comprising:
- a pair of substrates;
- and
- a TN mode liquid crystal layer provided between the pair of substrates, herein one of the pair of substrates comprises:
- a pixel region including a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed only along one side of the opening portion,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, an alignment of a liquid crystal molecule in the liquid crystal layer is controlled such that light which transmits through the liquid crystal layer and is incident into the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
2 more elements
A liquid crystal display device comprising:
- a pair of substrates;
- and
- a TN mode liquid crystal layer provided between the pair of substrates, wherein one of the pair of substrates comprises:
- a pixel region including a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed along one side of the opening portion,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, rubbing treatment is conducted such that light incident into the opening portion provided to the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
2 more elements
A display device comprising:
- a pair of substrates;
- and
- a liquid crystal layer provided between the pair of substrates, wherein one of the pair of substrates comprises:
- a pixel region including a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed along one side of the opening portion, a gate electrode adjacent to the semiconductor layer with a gate insulating film interposed therebetween,
- an interlayer insulating film formed over the thin film transistor;
- a source wiring electrically connected to the semiconductor layer through a wiring which is formed on the interlayer insulating film;
- and
- a gate wiring formed on the interlayer insulating film,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, an alignment of a liquid crystal molecule in the liquid crystal layer is controlled such that light which transmits through the liquid crystal layer and is incident into the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
6 more elements
A display device comprising:
- a pair of substrates;
- and
- a TN mode liquid crystal layer provided between the pair of substrates, wherein one of the pair of substrates comprises:
- a pixel region including, a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed only along one side of the opening portion,
- an interlayer insulating film formed over the thin film transistor;
- a source wiring electrically connected to the semiconductor layer through a wiring which is formed on the interlayer insulating film;
- and
- a gate wiring formed on the interlayer insulating film,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, an alignment of a liquid crystal molecule in the liquid crystal layer is controlled such that light which transmits through the liquid crystal layer and is incident into the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
6 more elements
A display device comprising:
- a pair of substrates;
- and
- a TN mode liquid crystal layer provided between the pair of substrates, wherein one of the pair of substrates comprises:
- a pixel region including a thin film transistor and a light shielding layer, the light shielding layer having an opening portion for transmitting light and comprising at least one layer, and the thin film transistor comprising a semiconductor layer which is overlapped with the light shielding layer and formed along one side of the opening portion,
- an interlayer insulating film formed over the thin film transistor;
- a source wiring electrically connected to the semiconductor layer through a wiring which is formed on the interlayer insulating film;
- and
- a gate wiring formed on the interlayer insulating film,
- wherein, when a change in transmittance of light which transmits through the pair of substrates becomes maximum with respect to a change in voltage applied to the liquid crystal layer, a rubbing treatment is conducted such that light incident into the opening portion provided to the one of the pair of substrates is incident as polarized light perpendicular to the one side of the opening portion.
6 more elements
Dependencies are inferred from the claim text.