Seiko Instruments Inc

Nobuyuki Sasaki

Tsutomu Matsuhira

Hiroki Hanawa

Hideaki Adachi

A display device of the present invention switches between two displays, a main panel display and a sub-panel display, by using one driver IC. Liquid crystals having different optimal driver voltages are used in the main panel and the sub-panel, and the optimal driver voltage for the panel in which display is to be performed is output. A driver voltage that is higher or lower than the optimal driver voltage is applied to the display panel where display is not to be performed, and the entire display thereof displays a single color. Display content of the panel on which display is not to be performed cannot be identified.

Display device and electronic device using the same

A liquid crystal display device has a liquid crystal panel comprised of a liquid crystal material disposed between segment and common electrodes defining pixels arranged in a matrix. A driver integrated circuit generates driving segment signals and driving common signals to drive preselected ones of the segment and common electrodes, respectively, to display an image on the liquid crystal panel. The driver integrated circuit also generates a segment signal waveform and a common signal waveform to drive one of the segment electrodes and one of the common electrodes, respectively, each placed in a normally ON state and not corresponding to the preselected ones of the segment and common electrodes, respectively, so that a frame is displayed at a portion of the liquid crystal panel not corresponding to the pixels.

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Chiba, Japan

Nobuyuki Sasaki