Liquid crystal display apparatus
View Patent ↗According to one embodiment, a liquid crystal display apparatus includes an array substrate, a counter-substrate and a liquid crystal layer formed by a negative liquid crystal material. The array substrate includes a common electrode, an insulating film, pixel electrodes each including a slit and a first alignment film. The liquid crystal layer includes liquid crystal molecules which form a bias angle in a direction substantially orthogonal to a direction of extension of the slit and which are initially aligned. The first alignment film, the liquid crystal layer and the bias angle have a relationship of −1.11≧−0.0353× C — PI/C — LC −0.0523×θ.
1. A liquid crystal display apparatus, comprising:
an array substrate comprising a common electrode, an insulating film disposed on the common electrode, a plurality of pixel electrodes each disposed on the insulating film to be opposite to the common electrode and including a slit, and a first alignment film covering the insulating film and the pixel electrodes;
a counter-substrate comprising a second alignment film arranged opposite to the first alignment film; and
a liquid crystal layer held between the array substrate and the counter-substrate, and formed by a negative liquid crystal material,
wherein
the liquid crystal layer comprises liquid crystal molecules which form a bias angle in a direction substantially orthogonal to a direction of extension of the slit and which are initially aligned, and
the first alignment film, the liquid crystal layer and the bias angle have a relationship of
−1.11≧−0.0353× C — PI/C — LC− 0.0523×θ
where a capacitance of the first alignment film is C_PI, a capacitance of the liquid crystal layer is C_LC, and the bias angle is θ,
the capacitance of the first alignment film is a value obtained by dividing a dielectric constant of the first alignment film by a thickness of the first alignment film, and
the capacitance of the liquid crystal layer is a value obtained by dividing a specific dielectric constant of the liquid crystal layer in a direction vertical to a longer axis of the liquid crystal molecules by a thickness of the liquid crystal layer.
2. A liquid crystal display apparatus, comprising:
an array substrate comprising a common electrode, an insulating film disposed on the common electrode, a plurality of pixel electrodes each disposed on the insulating film to be opposite to the common electrode and including a slit, and a first alignment film covering the insulating film and the pixel electrodes;
a counter-substrate comprising a second alignment film arranged opposite to the first alignment film; and
a liquid crystal layer held between the array substrate and the counter-substrate,
wherein
the liquid crystal layer comprises liquid crystal molecules which form a bias angle in a direction substantially orthogonal to a direction of extension of the slit and which are initially aligned, and
the first alignment film, the liquid crystal layer and the bias angle have a relationship of
−1.11≧−0.0353× C — PI/C — LC− 0.0523×θ
where a capacitance of the first alignment film is C_PI, a capacitance of the liquid crystal layer is C_LC, and the bias angle is θ,
the capacitance of the first alignment film is a value obtained by dividing a dielectric constant of the first alignment film by a thickness of the first alignment film, and
the capacitance of the liquid crystal layer is a value obtained by dividing a specific dielectric constant of the liquid crystal layer in a direction vertical to a longer axis of the liquid crystal molecules by a thickness of the liquid crystal layer.