Ultrahigh Resolution Graphic VFD Module

Abstract

The 640 × 400 graphic VFD module achieved ultrahigh resolution with a pixel pitch of 0.1875 × 0.225 mm by adopting electrostatic deflection of the single matrix system with wiregrid. The new driving system permits increased vertical resolution, a reduced number of grid driver ICs, and increased luminous characteristic dependency on the driving voltage. Elaborate drive circuit design makes possible image display in halftones by field sequential control. Multicolor display is also available with the combined liquid crystal color shutter (LCCS). Full-color capability with LCCS, and attainment of higher luminance will also receive further study because of the improvements brought by the electrostatic deflection type graphic VFD module.