Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1990-03-16
1991-09-10
Fuller, Benjamin R.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
346107R, 346160, 358298, 359 40, 359 55, 359 68, G01D 942, G02F 113
Patent
active
050477897
ABSTRACT:
Because the prior art liquid crystal driving control circuit needs shift registers, latch circuits and selectors in a number corresponding to the number of cells in the liquid crystal shutter array, the structure of the circuit inevitably becomes complicated and involves a large number of components to thereby push up the production cost. Since this invention method controls a liquid crystal shutter array with pulse width modulation, image data can be serially converted into the data necessary for switching ON/OFF the driving voltage, and the conversion circuit can be structured with only one system. As this invention method controls opening/closing of the cells with binary pulse width signals in a number corresponding to the number of liquid crystal cells, the structure of the circuit can be simplified and yet efficiency of recording in controlled gradation can be enhanced.
REFERENCES:
patent: 4591886 (1986-05-01), Umeda et al.
patent: 4605972 (1986-08-01), Hatanaka
patent: 4636817 (1987-01-01), Masaki
patent: 4859034 (1989-08-01), Shiraishi et al.
Kanayama Toshikiyo
Morimoto Ken-ichi
Fuji Photo Film Co. , Ltd.
Fuller Benjamin R.
Tran Huan
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