Patent ID: 6734836
Filing Date: 2004-05-11
Classification: G09G,H05B,Y02B

Abstract:
A current driving circuit comprising:(a) a first terminal electrically connected to a voltage source; (b) a second terminal grounded; (c) a signal line through which a signal current runs; (d) a first switch; (e) a second switch electrically connected to said signal line and further electrically connected in series to said first switch; (f) a third switch electrically connected to said first terminal; (g) a memory stage which converts said signal current into a voltage and stores said voltage therein; (h) a driving transistor; (i) a load electrically connected between a source of said driving transistor and said second terminal; and (j) a selection line electrically connected to said first switch, said second switch and said third switch, wherein said signal line is electrically connected to a gate of said driving transistor through said first and second switches,said memory stage is electrically connected between a gate of said driving transistor and said second terminal, said first switch is electrically connected between a drain and a gate of said driving transistor, and said driving transistor has a drain which is electrically connected to said signal line through said second switch and further to said first terminal through said third switch.