Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Patent
1997-03-27
1999-08-10
Sikes, William L.
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
349 37, 349 39, 345 92, G02F 11343, G02F 1141, G09G 336
Patent
active
059366869
ABSTRACT:
It is an object of this invention to provide an active matrix type liquid crystal display which uses a ferroelectric liquid crystal or antiferroelectric liquid crystal, which has a high response speed, a wide angle of field, and a high contrast, and which does not cause a "step response" phenomenon. An active matrix type liquid crystal display according to this invention includes pixel electrodes arranged in a matrix form, first switching devices arranged in a one-to-one correspondence with the pixel electrodes, signal lines for transmitting an image signal to the pixel electrodes via the first switching devices, scanning lines arranged to cross the signal lines to transmit a scanning signal for turning on the first switching devices, storage capacitance lines arranged parallel to the scanning lines to form storage capacitances between the storage capacitance lines and the pixel electrodes, and second switching devices arranged in a one-to-one correspondence with the pixel electrodes to connect pixel electrodes assigned to one scanning line to a storage capacitance line, while another scanning line is being selected, thereby resetting the pixel electrodes.
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Akiyama Masahiko
Nagata Hiroyuki
Okumura Haruhiko
Saishu Tatsuo
Suzuki Kouhei
Chowdhury Tarifur R.
Kabushiki Kaisha Toshiba
Sikes William L.
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