Abstract: A liquid crystal display device free from reduction of chromaticity and having a good image quality in comparison with a normally white mode semi-transmission liquid crystal display device even in a case of employing a normally black mode, able to secure a gap of a reflection portion able to suppress occurrence of defects, enabling a reduction of voltage, able to realize a reduction of power consumption, exhibiting a more natural color of the dark state of transmission, and able to improve the image quality, wherein a reflection portion and a transmission portion are provided in one pixel, a normally black mode which becomes a dark state when no voltage is supplied is employed, an orientation mode of the liquid crystals is a twist orientation, a polarization plate and one phase difference plate are provided on a viewing surface side, and a polarization plate is provided on a back surface side.

Abstract: A liquid crystal display device free from reduction of chromaticity and having a good image quality in comparison with a normally white mode semi-transmission liquid crystal display device even in a case of employing a normally black mode, able to secure a gap of a reflection portion able to suppress occurrence of defects, enabling a reduction of voltage, able to realize a reduction of power consumption, exhibiting a more natural color of the dark state of transmission, and able to improve the image quality, wherein a reflection portion and a transmission portion are provided in one pixel, a normally black mode which becomes a dark state when no voltage is supplied is employed, an orientation mode of the liquid crystals is a twist orientation, a polarization plate and one phase difference plate are provided on a viewing surface side, and a polarization plate is provided on a back surface side.

Abstract: A liquid crystal display device of a multi-domain vertical-alignment mode includes a driving substrate having a pixel electrode, a counter substrate opposing the driving substrate and having a counter electrode, and a liquid crystal sandwiched between the substrates. In the liquid crystal display device, molecules of the liquid crystal are aligned nearly perpendicularly to the substrates when no electric field is produced, and are aligned nearly horizontally by the application of a predetermined voltage. The counter substrate has an alignment center portion for orienting the molecules of the liquid crystal in all directions centered on a certain point when the voltage is applied. The area of the alignment center portion of the counter substrate is set to be less than or equal to 5% of the area of one pixel.

Abstract: A liquid crystal display device free from reduction of chromaticity and having a good image quality in comparison with a normally white mode semi-transmission liquid crystal display device even in a case of employing a normally black mode, able to secure a gap of a reflection portion able to suppress occurrence of defects, enabling a reduction of voltage, able to realize a reduction of power consumption, exhibiting a more natural color of the dark state of transmission, and able to improve the image quality, wherein a reflection portion and a transmission portion are provided in one pixel, a normally black mode which becomes a dark state when no voltage is supplied is employed, an orientation mode of the liquid crystals is a twist orientation, a polarization plate and one phase difference plate are provided on a viewing surface side, and a polarization plate is provided on a back surface side.

Abstract: A liquid crystal display device where a liquid crystal section is vertically oriented with respect to both a first substrate capable of transmitting light and a second substrate which includes a reflecting region and a transmitting region. A pair of retardation films are disposed on both sides of the vertically oriented liquid crystal section, and have symmetrical phase characteristics over a visible wavelength region. Lagging phase axes of the pair of retardation films intersect each other, with an intersecting angle thereof being set in a range of from 90°±10°. Relative shifts in phase differences of the pair of retardation films are controlled within a range of ±30 nm. The reflective-and-transmissive liquid crystal display device makes it possible to provide, a high contrast and a high transmittance ratio in a transmission display mode and, a high contrast and a high reflection ratio in a reflection display mode.

Abstract: The present invention provides a monostable ferroelectric liquid crystal display apparatus includes a pair of substrates, each subjected to uniaxial orientation processing and arranged so that their orientation processing directions are approximately parallel to each other; and a ferroelectric liquid crystal material having the chiral smectic C phase filled between the substrates, the liquid crystal material being such that the projection component of the cone drawn by a liquid crystal molecule of the ferroelectric liquid crystal material projected onto the substrate and the projection component of the liquid crystal molecule itself projected onto the substrate in the molecule axis direction are respectively identical to the orientation processing direction of the substrates, which state is the initial state of the monostable configuration, wherein the ferroelectric liquid crystal contains a compound having a phenyl pyrimidine skeleton having one end connected to an alkoxyl chain and the other end connected t

Abstract: A liquid crystal display device including a first substrate capable of transmitting light therethrough; a second substrate at which a pixel including a reflection region and a transmission region is formed; and a liquid crystal section held by the first substrate and the second substrate that are bonded together through a gap. In the liquid crystal display device, the liquid crystal section is oriented vertically with respect to the substrates when no voltage is applied thereto; and a pair of retardation films are disposed on both sides of the vertically oriented liquid crystal section, and have symmetrical phase characteristics over a visible wavelength region. Lagging phase axes of the pair of retardation films intersect each other, with an intersecting angle thereof being set in a range of from 90°±10°. Relative shifts in phase differences of the pair of retardation films are controlled within a range of ±30 nm.

Abstract: A liquid crystal display device of a multi-domain vertical-alignment mode includes a driving substrate having a pixel electrode, a counter substrate opposing the driving substrate and having a counter electrode, and a liquid crystal sandwiched between the substrates. In the liquid crystal display device, molecules of the liquid crystal are aligned nearly perpendicularly to the substrates when no electric field is produced, and are aligned nearly horizontally by the application of a predetermined voltage. The counter substrate has an alignment center portion for orienting the molecules of the liquid crystal in all directions centered on a certain point when the voltage is applied. The area of the alignment center portion of the counter substrate is set to be less than or equal to 5% of the area of one pixel.

Abstract: The present invention provides a monostable ferroelectric liquid crystal display apparatus includes a pair of substrates, each subjected to uniaxial orientation processing and arranged so that their orientation processing directions are approximately parallel to each other; and a ferroelectric liquid crystal material having the chiral smectic C phase filled between the substrates, the liquid crystal material being such that the projection component of the cone drawn by a liquid crystal molecule of the ferroelectric liquid crystal material projected onto the substrate and the projection component of the liquid crystal molecule itself projected onto the substrate in the molecule axis direction are respectively identical to the orientation processing direction of the substrates, which state is the initial state of the monostable configuration, wherein the ferroelectric liquid crystal contains a compound having a phenyl pyrimidine skeleton having one end connected to an alkoxyl chain and the other end connected t