LIQUID CRYSTAL DISPLAY OF CHIP ON GLASS TYPE

摘要

PURPOSE: A liquid crystal display of a chip on glass type is provided to supply a drive voltage to all drive circuits for making drive circuits normally operate, although the wiring for supplying the drive voltage is connected between the drive circuits in series, when forming the wiring for supplying the drive voltage to the drive circuits on a panel directly by a COG(Chip On Glass) technology. CONSTITUTION: A drive voltage generation unit(200) including a charge pumping circuit(202) and a buffer(204) is provided to each drive IC. The charge pumping circuit(202) makes the drive voltage(Vi) applied from the drive IC of the previous stage ascended as a predetermined level and outputs a voltage(Vcpp). A buffer circuit(204) stabilizes the voltage(Vcpp) outputted from the charge pumping circuit(202), produces a voltage(Voo) and outputs it to the next stage. The buffer circuit may be constructed by two CMOS inverters connected in series.