Kabushiki Kaisha Toshiba

Yoshimasa Adachi

Kan Shimizu

Shozo Takeno

Akira Masuko

Masayuki Kakegawa

A signal line driver is used for a liquid crystal display device including a matrix array of 230.times.720 pixels arranged in a predetermined color order for each row, 230 scanning lines for selecting the row of the pixels, and 720 signal lines for setting the potentials of the pixels of the selected row. The signal line driver has three bus lines for receiving color video signals of three primary colors. Particularly, the signal line driver includes 721 sample-hold circuits divided into a plurality of groups and connected to the bus lines based on the color order of the pixels on a corresponding row, for sequentially sampling and holding the color video signals on the bus lines, 720 selection switches for selecting one of the groups of the sample-hold circuits according to the selected row of the pixels and allocating output voltages of the sample-hold circuits of the selected group to the 720 signal lines, and a control circuit for controlling the sample-hold circuits and the selection switches each time the selected row of the pixels is updated.

Signal line driving circuit

A liquid crystal apparatus in which an anisotropic conductive layer made of organic resin containing several electrically conductive particles having substantially identical particle sizes is disposed between lead electrodes of a liquid crystal device and the lead electrodes of a drive circuit board, thermocompression bonding being applied to make the electrically conductive particles in direct contact with both lead electrodes to allow both lead electrodes to be electrically connected with each other. Further, at least one of the lead electrodes of a common electrode in the liquid crystal device and of the circuit board corresponding to the common electrode includes a number of separated electrodes that are spaced apart, and the pitches and widths of the separated electrodes are in the range of .+-.30% around the average values for pitch and width for the separated electrodes.

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Fujisawa, Japan

Yoshimasa Adachi