ARRAY ADDRESSING OF PNEUMATICALLY SWITCHED IMAGE DISPLAY DEVICE

摘要

Apparature for controlling an image display device having at least one element(10) with a reflective state in which incident light undergoes total internal reflection and a non-reflective state in which the total internal reflection is prevented. A member (18) is positioned adjacent the element for deformation of the member between a first position in which a gap (20) remains between the member and the elements and a second positon in which the member is in optical contact with the element. The apparatus incorporates a support structure (26) having one or more display chambers (24). Each display chamber contains one of the elements and members aforesaid. A first aperture (32) is provided in the support structure for air communication between the display chamber and a second chamber (30) provided in the support structure. A preferably elastomeric valve member (38) is provided in the second chamber, for deformation of the valve member between a closed position in which the valve member is biased against the first aperture to prevent air communication through the first aperture and an open position in which the valve member is biased away from the first aperture to permit air communication through the first aperture. A second aperture (36) is provided in the support structure for air communication against a base of the valve member; and, a third aperture (34) is provided in the support structure for air communication through the second chamber and through the first aperture when the valve member is in the open position.