Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-08-15
1996-07-02
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345100, 345204, G09G 336
Patent
active
055327125
ABSTRACT:
A drive circuit, for use with a transmissive scattered liquid crystal display device, prevents a residual image caused by a high speed display switching, while having a reduced size and fewer parts, thereby improving reliability. The drive circuit comprises a shift register (3a), a first gate for functioning as an AND circuit (2a), a second gate for functioning as an exclusive OR circuit (2b), and a switching device (7) with a higher withstand voltage than a logic signal. These constructional elements are formed within an IC. A logic signal for driving the liquid crystal display device is input to the second gate (2b). The output of the buffer (8) is connected to a totem pole drive circuit (10) for driving a common electrode (C) with a high voltage (HV) which is synchronized with the logic signal.
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Mori Akira
Tsuda Yukihiro
Fatahi-yar M.
Hjerpe Richard
Kabushiki Kaisha Komatsu Seisakusho
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