A comb-tooth drive is realized by using a display driver which drives data lines. A frame identifier is made anonymous to unauthorized entities but identifiable by the authorized entities. Pre-contoured spinal rods are engaged post-derotation to secure the correction. One or both of the step of forming the gate electrode and the step of forming the opening in the insulating layer isare conducted by a lithography process using a phase-shift mask or a hologram mask. The second side plate forms two lines of tabs for sandwiching the circuit board therebetween.