demultiplexer configuration of fig3 a single light source led 90 provides illumination to any of 625 pixels under the control of control means 52 of course a tree demultiplexer may be constructed to serve a larger or smaller number of pixels fig3 being for illustrative purposes only in any case use of the tree demultiplexer assures that all light beams are switched an equal number of times before reaching the display fig4 shows how the micromechanical light modulators of the tree configuration demultiplexer of fig3 may be constructed here an array 120 of micromechanical light modulators which may be assumed to be formed on the surface of an integrated circuit as an integral part thereof such as micromechanical light modulator 122 has the modulators rectilinearly arranged in rows r1 r10 and columns a1 b1 b4 and c1 c16 whereas in the tree demultiplexer of fig3 each micromechanical light modulator optically coupled the light output of one optical fiber to a selected one of five other optical fibers on array 120 each micromechanical light modulator optically couples the light output of one optical fiber to a selected one of four other optical fibers none of the optical fibers are shown in fig4 it will be understood then for example that the micromechanical light modulator at column a1 and row r1 will optically couple a light source to any selected one of four optical fibers which lead to the micromechanical light modulators at columns b1 b4 and row r1 each one of four latter micromechanical light modulators will in turn couple the light to any selected one of four optical fibers which lead to four of the micromechanical light modulators at columns c1 c16 and row r1 which.