Lamella blind system comprising - at least one lamella element having: a screen body made of a membrane material; a first rotatable mount with a first clamp engaging a first end of the screen body; and a second rotatable mount with a second clamp engaging a second end of the screen body; wherein the screen body is clamped between the first and second rotatable mounts; wherein the screen body is loaded with a pre-determined tension applied in an axial direction parallel to the screen body; and wherein the at least one lamella element is rotatable about an axis of rotation defined by the first and second rotatable mounts, said axis of rotation is parallel to the axial direction; a first support structure supporting the first rotatable mount ; - a second support structure supporting the second rotatable mount ; and - a drive mechanism for controlling the rotational position of the at least one lamella element , wherein the drive mechanism is a single-ended drive mechanism acting on only one of the first and second rotatable mounts of the at least one lamella element ; wherein the first clamp of the at least one lamella element engages the first end of the screen body with a first clamping force having a first axial tensioning force component that is uniformly distributed in a transverse direction across the first end of the screen body , and/or wherein the second clamp of the at least one lamella element engages the second end of the screen body with a second clamping force having a second axial tensioning force component that is uniformly distributed in a transverse direction across the second end of the screen body ; said lamella blind system being characterized in that the first clamp of the at least one lamella element and/or the second clamp of the at least one lamella element are curved as seen in a cut plane perpendicular to the axial direction so as to impose a curved profile on the screen body with a convex front side and a concave back side. - at least one lamella element having: a screen body made of a membrane material; a first rotatable mount with a first clamp engaging a first end of the screen body; and a second rotatable mount with a second clamp engaging a second end of the screen body; wherein the screen body is clamped between the first and second rotatable mounts; wherein the screen body is loaded with a pre-determined tension applied in an axial direction parallel to the screen body; and wherein the at least one lamella element is rotatable about an axis of rotation defined by the first and second rotatable mounts, said axis of rotation is parallel to the axial direction; a first support structure supporting the first rotatable mount ; a screen body made of a membrane material; a first rotatable mount with a first clamp engaging a first end of the screen body; and a second rotatable mount with a second clamp engaging a second end of the screen body; wherein the screen body is clamped between the first and second rotatable mounts; wherein the screen body is loaded with a pre-determined tension applied in an axial direction parallel to the screen body; and wherein the at least one lamella element is rotatable about an axis of rotation defined by the first and second rotatable mounts, said axis of rotation is parallel to the axial direction; a first support structure supporting the first rotatable mount ; - a second support structure supporting the second rotatable mount ; and - a drive mechanism for controlling the rotational position of the at least one lamella element , wherein the drive mechanism is a single-ended drive mechanism acting on only one of the first and second rotatable mounts of the at least one lamella element ; <EOS>