A liquid crystal display device has a plurality of pixels and a reflection section for reflecting incident light toward a display surface. A gap fill insulating layer is formed on the resulting structure to fill a gap region bounded by the trench and the trench masks. Clamping screws are associated with the frame to secure the frame to the cutting bar and an additional clamping screw is associated with the frame for engaging the link of the tooth to be sharpened in order to fix its position with respect to the sharpening area of the frame.