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| Device for processing optical data with improved optical allignment means |
| The main object of the present invention is to provide a device for processing optical data which ... |
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| Liquid crystal display cell having a diffusely-reflective counter electrode |
| OF THE INVENTION In the embodiment shown by way of example only in FIGS. 1 and 2, the display cell ... |
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| Gain reflector-liquid crystal display |
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| Light modulating apparatus |
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Method for addressing X-Y matrix display cells
| Details |
Inventors: Ueda, Fumio; Arai, Hirotsugu;
Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JA)
Primary Examiner: Curtis; Marshall M.
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Fisher, Spivak, McClelland & Maier
A matrix addressing method for a group of X-Y matrix display cells having an X.sub.i - Y.sub.j two-dimensional matrix electrode structure (where i equals 1,2,3, . . . , M, and j equals 1,2,3, . . . , N) during an N time frame period comprising the steps of: applying an X.sub.i - electrode voltage e.sub.Xi having a binary value of one or zero to the 1,2,3, . . . , M electrodes in such a manner that only a single binary one is applied during an N time frame period, applying a Y.sub.j -electrode voltage e.sub.Yj having a binary value of one or zero sequentially to the 1,2,3, . . . N Y.sub.j electrodes in such a manner that a binary one is only applied to the first electrode during the first time frame, a binary one is only applied to the second electrode during the second time frame, a binary one is only applied to the third electrode during the third time frame, . . . , and a binary one is only applied to the Nth electrode during the Nth time frame; and addressing matrix display cells P.sub.ij in response to the timing at which the electrode voltages e.sub.Xi and e.sub.Yj assume individual binary states. |
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DETAILED DESCRIPTION Therefore, a principal object of the present invention is to provide a new and improved unique X-Y matrix addressing method in which the liberty of the pattern to be responsive is restrained whereby the prior art drawbacks are removed.
It is a further object of the present invention to provide a new an improved unique X-Y matrix addressing method which is simple in construction, inexpensive to embody, and capable of operation with little variation in the light intensity of the matrix cells and which offers a display having an excellent contrast.
With this and other objects in mind, the invention may best be incorporated into a two-tone matrix device comprising liquid crystal cells, the apparent birefringence of which is controllable by the effective value of an external voltage applied.
This type of matrix device is characterized in that the scanning voltages e.
sub.
Y1, e.
sub.
Y2, .
.
.
, e.
sub.
YN applied to the scanning electrodes Y.
sub.
1, Y.
sub.
2, .
.
.
, Y.
sub.
N assume a "1" state only during one time slot over the period of a cycle T, and when one of the scanning voltages is in a "1" state, all the other scanning voltages assume a "0" state, as in the prior art device.
The signal voltages e.
sub.
X1, e.
sub.
X2, .
.
.
, e.
sub.
Xm applied to the signal electrodes X.
sub.
1, X.
sub.
2, .
.
.
, X.
sub.
M assume a "1" state the same number of times for N number of the slots of the respective signal voltages, and the effective values of the voltage e.
sub.
Xi - e.
sub.
Yj to be applied to the matrix cell P.
sub.
ij are made equal to each other for both the selected and unselected points.
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LCD 
