Sony Corporation

Kazuto Kimura

Masatake Hayashi

Yasushi Ito

Mitsuyasu Asano

Shozo Masuda

Kaoru Yanamoto

Yoshihiro Katsu

Tomio Aoki

Shoichi Tanamachi

Hiroaki Yasunaga

A display device to display an image corresponding to image signals in a display area is provided. The display device includes a backlight including individually placed light sources corresponding to areas in the display area; a panel that includes pixels corresponding to the display area and that changes transmittance of light from the light sources in units of pixels; a panel control unit to individually set emission brightness of each of the light sources in accordance with the image signals and set the transmittance of light in each of the pixels in accordance with the emission brightness; a storage unit to store a nonlinear conversion table to convert the emission brightness to a light source control value for the backlight; and a backlight control unit to convert the emission brightness to the light source control value in accordance with the nonlinear conversion table and supply the light source control value to the backlight.

Display device and display control method

Disclosed is a backlight control apparatus for controlling a backlight used in a liquid crystal display, the backlight having a lighting area that includes a plurality of blocks in each of which a backlight luminance is individually allowed to change. The apparatus includes a backlight control unit that calculates the backlight luminance of each block so that the absolute value of the difference between a backlight lighting ratio and 1 is at or below a first value, and controls the backlight so as to yield the calculated backlight luminances of the respective blocks, the backlight lighting ratio being the ratio between backlight set values of neighboring blocks.

Apparatus and method for controlling backlight and liquid crystal display

A display apparatus includes a display unit having a display screen divided into a plurality of regions and controlled using a transmittance ratio on a pixel-by-pixel basis, a backlight including a plurality of sets of light sources, each set being disposed so as to correspond to one of the regions, and a control unit for identifying display luminance in each region, computing the emission luminance of each light source on the basis of the identified display luminance while taking into account an effect on the region of the other light sources not corresponding to the region, and computing a correction value for each pixel on the basis of a shift amount between the set emission luminance and an optimal display luminance for one of the regions, and delivering a display driving signal generated on the basis of the correction value to each pixel so as to control the luminance of the pixel.

Display apparatus and method for controlling a backlight with multiple light sources of a display unit

A plasma addressed liquid crystal display device is disclosed wherein the dimension of a gap of a liquid crystal cell is controlled uniformly over the entire area of the screen of the display device. The display device comprises a first substrate having a plurality of striped data electrodes formed substantially in parallel on a major surface thereof, a second substrate disposed in an opposing relationship to the first substrate and having a plurality of discharge electrodes formed thereon perpendicularly to the data electrodes, an intermediate sheet interposed between the first and second substrates and cooperating with the second substrate to define a discharge chamber between them, a plurality of barrier ribs having top surfaces for contacting in a contacting pattern with a surface of the intermediate sheet, an adhesive spacer interposed between the first substrate and the intermediate sheet and adhered to and cooperating with the other surface of the intermediate sheet to define a gap, the adhesive spacer having a pattern corresponding to the contacting pattern, and a liquid crystal layer enclosed in the gap and having a thickness determined by the adhesive spacer.

Plasma addressed liquid crystal display device

A plasma addressed liquid crystal display device having a flat panel structure where a liquid crystal cell is superposed on a plasma cell. The liquid crystal cell comprises a front substrate with data electrodes arranged in columns, an intermediate substrate bonded to the front substrate via a predetermined gap, and a liquid crystal filled in the gap. The plasma cell comprises a rear substrate joined to the intermediate substrate via a predeter- mined space, and discharge channels formed in the space and arranged in rows. The intermediate substrate is dimensionally so set as to include an overlapping planar region of the front substrate and the rear substrate which are different in shape from each other. And spacer particles for prescribing the gap dimension in the liquid crystal cell are existent between the intermediate and front substrates over the planar region. Further a plurality of barrier ribs for prescribing the space dimension in the plasma cell are existent between the intermediate and rear substrates over the planar region. In this display device, the gap in the liquid crystal cell is rendered dimensionally uniform, and breakage of the intermediate substrate is preventable.

Method of manufacturing plasma addressed liquid crystal display

A plasma addressed liquid crystal display device having a flat panel structure where a liquid crystal cell is superposed on a plasma cell. The liquid crystal cell includes a front substrate with data electrodes arranged in columns, an intermediate substrate bonded to the front substrate via a predetermined gap, and a liquid crystal filled in the gap. The plasma cell includes a rear substrate joined to the intermediate substrate via a predetermined space, and discharge channels formed in the space and arranged in rows. The intermediate substrate is dimensionally so set as to include an overlapping planar region of the front substrate and the rear substrate which are different in shape from each other. Further a plurality of barrier ribs for prescribing the space dimension in the plasma cell are existent between the intermediate and rear substrates over the planar region.

Growing community of inventors

Kanagawa, Japan

Kazuto Kimura