Importance

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Abstract

A matrix display of the back-illiminated electromechanical type has enhanced picture display features by including display elements whose brightness is individually adjustable. In one arrangement, each display element has an aperture and an opaque shutter selectively settable to each one of at least three stable positions. In one position, the shutter covers the aperture completely, and in the other positions, it uncovers the aperture to a differing extent so as to pass light of differing intensity depending on the position. The activating mechanism for the matrix display is a moving head having two magnetic actuators arranged side-by-side for each row of display elements. One magnetic actuator serves to accelerate the shutter of a selected display element, and the other applies a braking force to halt the shutter in the desired position so as to control the brightness of the display element. By providing a group (e.g. three) of differently-tinted display cells for each matrix element, a color display can be produced.

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First Claim