A micro-electro-mechanical device (20; 30; 40; 50; 80) comprising: a substrate (21; 51; 81); a pivoting structure comprising: a tiltable platform (22; 32; 42; 52; 82) disposed over the substrate, pivotable in a single direction about a first axis (23; 53; 83) substantially parallel to the substrate, wherein the tiltable platform is asymmetric about the first axis, having a long side (22B; 32B; 52B; 82B) extending in a first direction perpendicular to the first axis (23; 53; 83) and a short side (22A; 32A; 52A; 82A) extending a shorter distance than the long side in a second, opposite direction, wherein the pivoting structure has a center of gravity on or directly above, to the non-substrate side of, the first axis (23; 53; 83); a first support (7; 7A, 7B; 9) for supporting the tiltable platform over (22; 32; 42; 52; 82) the substrate (21; 51; 81); a first hinge structure (28; 58; 88) defining the first axis (23; 53; 83), extending between the first support (7; 7A, 7B; 9) and the tiltable platform (22; 32; 42; 52; 82); and a first electrode structure including a first electrode (26; 56; 86) mounted on the substrate (21; 51; 81) under the long side of the tiltable platform (22; 32; 42; 52; 82), for tilting the pivoting structure about the first axis (23; 53; 83), the pivoting structure has a pedestal extending upwardly from the tiltable platform (22; 32; 42; 52; 82); and a reflector (24; 54; 84) mounted on the pedestal, the reflector (24; 54; 84) extending over the short side and a first portion of the long side of the tiltable platform (22; 32; 42; 52; 82), wherein a second portion of the long side of the tiltable platform (22; 32; 42; 52; 82) extends from under the reflector (24; 54; 84); and the micro-electro-mechanical device (20; 30; 40; 50; 80) further comprises a covering structure (27; 114A, 114B) mounted on the substrate (21; 51; 81) proximate to the long side (22B; 32B; 52B; 82B) of the tiltable platform (22; 32; 42; 52; 82), the covering structure having an overhang section disposed over the second portion of the long side of the tiltable platform extending from under the reflector (24; 54; 84), whereby the covering structure does not impede tilting of the pivoting structure in the single direction about the first axis (23; 53; 83). a substrate (21; 51; 81); a pivoting structure comprising: a tiltable platform (22; 32; 42; 52; 82) disposed over the substrate, pivotable in a single direction about a first axis (23; 53; 83) substantially parallel to the substrate, wherein the tiltable platform is asymmetric about the first axis, having a long side (22B; 32B; 52B; 82B) extending in a first direction perpendicular to the first axis (23; 53; 83) and a short side (22A; 32A; 52A; 82A) extending a shorter distance than the long side in a second, opposite direction, wherein the pivoting structure has a center of gravity on or directly above, to the non-substrate side of, the first axis (23; 53; 83); a tiltable platform (22; 32; 42; 52; 82) disposed over the substrate, pivotable in a single direction about a first axis (23; 53; 83) substantially parallel to the substrate, wherein the tiltable platform is asymmetric about the first axis, having a long side (22B; 32B; 52B; 82B) extending in a first direction perpendicular to the first axis (23; 53; 83) and a short side (22A; 32A; 52A; 82A) extending a shorter distance than the long side in a second, opposite direction, wherein the pivoting structure has a center of gravity on or directly above, to the non-substrate side of, the first axis (23; 53; 83); a first support (7; 7A, 7B; 9) for supporting the tiltable platform over (22; 32; 42; 52; 82) the substrate (21; 51; 81); a first hinge structure (28; 58; 88) defining the first axis (23; 53; 83), extending between the first support (7; 7A, 7B; 9) and the tiltable platform (22; 32; 42; 52; 82); and a first electrode structure including a first electrode (26; 56; 86) mounted on the substrate (21; 51; 81) under the long side of the tiltable platform (22; 32; 42; 52; 82), for tilting the pivoting structure about the first axis (23; 53; 83), the pivoting structure has a pedestal extending upwardly from the tiltable platform (22; 32; 42; 52; 82); and a reflector (24; 54; 84) mounted on the pedestal, the reflector (24; 54; 84) extending over the short side and a first portion of the long side of the tiltable platform (22; 32; 42; 52; 82), wherein a second portion of the long side of the tiltable platform (22; 32; 42; 52; 82) extends from under the reflector (24; 54; 84); and the micro-electro-mechanical device (20; 30; 40; 50; 80) further comprises a covering structure (27; 114A, 114B) mounted on the substrate (21; 51; 81) proximate to the long side (22B; 32B; 52B; 82B) of the tiltable platform (22; 32; 42; 52; 82), the covering structure having an overhang section disposed over the second portion of the long side of the tiltable platform extending from under the reflector (24; 54; 84), whereby the covering structure does not impede tilting of the pivoting structure in the single direction about the first axis (23; 53; 83).