Liquid-crystal display device
AssigneeToshiba Matsushita Display Technology Co., Ltd.
InventorsMitsutaka Okita, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
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Abstract
In an embodiment of the invention for an OCB (Optically Compensated Bend)-mode liquid-crystal display (LCD) device, retardation and/or a predetermined voltage range, from which a voltage applied to pixels in a viewing area is selected, is set for the each pixel or for the pixels in each region of the viewing area such that: the luminance on each pixel monotonously increases or decreases with increase of voltage in the predetermined voltage range; the luminance in central portion of the viewing area becomes minimum at black displaying.
Claims12
A liquid-crystal display device comprising:
- a display panel having an array substrate, a counter substrate, an OCB-mode liquid-crystal layer sandwiched between the array and counter substrates, and a viewing area formed of an array of pixels;
- a voltage applier that selects at least one voltage from a predetermined voltage range in response to an inputted video signal and apply a selected voltage to the OCB-mode liquid-crystal layer at each of the pixels, as to determine a luminance on the each pixel in response to the inputted video signal;
- wherein retardation and/or the predetermined voltage range is set for the each pixel or for the pixels in each region of the viewing area such that:
- the luminance on each pixel monotonously increases or decreases with increase of voltage within the predetermined voltage range;
- the luminance in central portion of the viewing area becomes minimum value at black displaying.
A liquid-crystal display device comprising:
- a display panel having an array substrate, a counter substrate, an OCB-mode liquid-crystal layer sandwiched between the array and counter substrates, and a viewing area formed of an array of pixels;
- a voltage applier that selects at least one voltage from a predetermined voltage range in response to an inputted video signal and apply a selected voltage to the OCB-mode liquid-crystal layer at each of the pixels, as to determine a luminance on the each pixel in response to the inputted video signal;
- wherein retardation is set so that;
- a voltage achieving a minimum luminance of the pixels in the end portion when applied thereto is larger than a voltage achieving a minimum luminance of the pixels in the central portion when applied thereto.
A liquid-crystal display device comprising:
- a display panel having an array substrate, a counter substrate, an OCB-mode liquid-crystal layer sandwiched between the array and counter substrates, and a viewing area formed of an array of pixels;
- a voltage applier that selects at least one voltage from a predetermined voltage range in response to an inputted video signal and apply a selected voltage to the OCB-mode liquid-crystal layer at each of the pixels, as to determine a luminance on the each pixel in response to the inputted video signal;
- wherein a voltage applied to the pixels in the central portion at a time of displaying black images achieves a minimum luminance of the pixels in the central portion and is set to be larger than a voltage applied to the pixels in the end portion at the time of displaying black images.
Dependencies are inferred from the claim text.