Light modulation device with matrix addressing
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United States of America Patent
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Jan 7, 1992
Grant Date -
N/A
app pub date -
Apr 18, 1991
filing date -
Apr 20, 1990
priority date (Note) -
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Importance
Abstract
A light modulation device with matrix addressing including a matrix of cells. Each cell has two flaps fixed to a substrate by flexible attachments, a control electrode, a row electrode and a maintenance electrode. The flaps can adopt two stable positions through the application of suitable voltages to the row and maintenance electrodes. The flaps are activated by the application of a control voltage to the electrode at the same time as the voltage on the row electrode is returned to zero. The arrangement of the electrodes together with the existence of a maintenance electrode, which is common to all the flaps on the matrix, allows matrix addressing to be achieved.
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