Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Japan Display Inc.

Kentaro Ojima

Ikuo Hiyama

Masahiro Ishii

Daisuke Kajita

Yasushi Tomioka

Yoshiro Mikami

Teruhisa Nakagawa

Yoshinori Aono

Shisei Katou

A color filter layer includes a first filter, a second filter, and a third filter of different colors. Further, the color filter layer includes a fourth filter of a color same as that of one of the three filters, and a black matrix partitioning the four filters. A hole is formed on the fourth filter. The hole extends in the direction along the first line portion of the black matrix, and the first line portion forms a part of the edge of the hole. With this structure, it is possible to prevent variation in the area ratio of a hole formed in the fourth sub-pixel for improving brightness in a liquid crystal display panel.

Liquid crystal display panel

In a liquid crystal display device, the reduction of power consumption is realized by reddening a backlight while maintaining a white balance. An aperture ratio of a red subpixel and an aperture ratio of a blue subpixel are set such that, in a state where an aperture ratio of a green subpixel in each pixel of a liquid crystal panel is fixed to a desired value, white brightness efficiency takes a maximum value which is set based on a balance between light emission efficiency which is increased corresponding to lowering of a color temperature of the backlight and transmissivity of the pixel which is decreased corresponding to the increase of the aperture ratio of the blue subpixel.

Liquid crystal display device with red, green and blue subpixels having different aperture ratios

A liquid crystal display device includes first and second substrates with first and second polarizing layers, a liquid-crystal layer, a matrix-driven electrode group; and a rear-illuminating device. Between the first polarizing layer and the liquid-crystal layer, a first optical compensating member is disposed without a birefringent medium sandwiched between the liquid-crystal layer and the first optical compensating member, and the first optical compensating member is constructed so that when a refractive index thereof in a slow-axis direction in a plane parallel to the substrate is taken as n1, a refractive index in a fast-axis direction in the plane parallel to the substrate is taken as n2, and a refractive index in a thickness direction is taken as n3, the first optical compensating member satisfies n1&#x2248;n3&#x3e;n2, and a slow axis thereof in the plane parallel to the substrate is substantially vertical to an optical axis of the liquid-crystal layer.

Liquid crystal display device comprising a first optical compensating member between the liquid crystal layer and one of the first and second polarizing layers

Provided is a liquid crystal display device including: a substrate () including a polarizing layer () on a light-input side; a substrate () including a polarizing layer () on another side, the polarizing layers having absorption axes substantially perpendicular; a liquid crystal layer () in which a liquid-crystal-molecule is aligned to be substantially horizontal to the substrates. In a case where an absorption axis of the polarizing layer () and an optical axis of the liquid crystal layer are substantially perpendicular, the optical compensating members (and) may be provided between the polarizing layer () and the liquid crystal layer; the absorption axis of the polarizing layer () and a slow axis of the optical compensating members are substantially perpendicular; each pixel satisfies nx&#x2248;ny&#x2260;nz; thickness-direction retardation for pixels of one color is different from other colors; and the thickness-direction retardation for red pixels is larger than 0 nm.

Liquid crystal display device

A liquid crystal display device comprising a first optical compensating member disposed without a birefringent medium sandwiched between a liquid-crystal layer and the first optical compensating member. The first optical compensating member is constructed so that when a refractive index thereof in a slow-axis direction in a plane parallel to the substrate is taken as n1, a refractive index in a fast-axis direction in the plane parallel to the substrate is taken as n2, and a refractive index in a thickness direction is taken as n3, the first optical compensating member satisfies n1&#x2dc;n3&#x3e;n2 and a slow axis thereof in the plane parallel to the substrate is substantially vertical to an optical axis of the liquid-crystal layer.

Liquid crystal display device comprising a first optical compensating member disposed without a birefringent medium sandwiched between the liquid crystal layer and the first optical compensating member

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Hitachi, Japan

Kentaro Ojima