Liquid crystal display having fast response time and preventing color shift is disclosed. The frequency converting circuit includes a converter which converts the amplified signal into a current signal and a switching circuit which multiplies the current signal by the local signal and generates the multiplied signal. The variants may further be optimized for the capability to elicit effector functions produced by immune effector cells by production of the antibody variants under conditions that produce effector function enhancing glycosylation of the Fc-region. A fiber optic lens connected to the camera and projecting from the housing is arranged to be positioned between two front teeth.