Other

Akitoshi Miyaoka

Yoshimi Kinoshita

Yoshikazu Ikuta

Kunifumi Nakanishi

Shuji Nishizaki

With the prior art image-adjusting system for a liquid crystal display, flicker is adjusted by operator's visual examination and so human factors vary the potential-adjusting value applied to the common electrode. The invention provides an image-adjusting system and method free of this problem. The image-adjusting method starts with placing optical sensors opposite to a given location on a liquid crystal display. The output waveform from the optical sensors is observed on an oscilloscope in synchronism with the vertical synchronizing signal that is synchronized to odd frames or even frames. The potential applied to the common electrode of the liquid crystal display is shifted upward from the optimum potential to observe a first waveform. The potential on the common electrode is shifted downward from the optimum potential to observe a second waveform. The potential Vcom applied to a liquid crystal display to be adjusted is so adjusted that the waveform derived from the liquid crystal display to be adjusted has a phase midway between the phases of the previously obtained first and second waveforms.

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Kumamoto, Japan

Akitoshi Miyaoka