Liquid crystal display device

摘要

The present invention relates to a liquid crystal display device which can reduce a chip size and improves an electrostatic discharge capability.;The liquid crystal display device includes a liquid crystal panel for displaying a picture, and a driving circuit unit for driving the liquid crystal panel, wherein the driving circuit unit includes an input/output unit having a plurality of input units for receiving signals from an outside and a plurality of output units for forwarding signals to an outside, a logic unit having a plurality of logical cells each having a plurality of digital logical devices for receiving or forwarding a signal through the input/output unit, and an electrostatic shielding unit for protecting the digital logical devices from an external static electricity,;wherein some of elements of the electrostatic shielding unit are formed in spaces among the logical cells.

主权项

1. A liquid crystal display device, comprising:
a liquid crystal panel displaying a picture; and a driving circuit unit driving the liquid crystal panel, wherein the driving circuit unit comprises:
an input/output unit comprising a plurality of input units receiving signals from an outside and a plurality of output units forwarding signals to the outside,a logic unit having a plurality of logical cells each comprising a plurality of digital logical devices receiving or forwarding a signal through the input/output unit, andan electrostatic shielding unit protecting the digital logical devices from an external static electricity,
wherein the electrostatic shielding unit comprises:
an electrostatic sensing unit sensing introduction of static electricity thereto, anda plurality of electrostatic discharge transistors connected in parallel to one another,wherein the plurality of electrostatic discharge transistors excluding the electrostatic sensing unit are respectively positioned in dummy areas as spaces among the logical cells, the dummy areas adjusting a pattern density of the logic unit and the sizes of the electrostatic discharge transistors being respectively varied with the sizes of the dummy areas,wherein a plurality of the dummy areas being respectively disposed in between adjacent logical cells which are positioned in a row,wherein a first row and a second row of the electrostatic discharge transistors share a ground line between the first and second rows, and the second row and a third row of the electrostatic discharge transistors share a power supply line between the second and third rows, the electrostatic discharge transistors being connected in parallel between the power supply line and the ground line, andwherein the electrostatic sensing unit comprises:
a resistor connected between the power supply line and a node,a capacitor connected between the node and the ground line, andan inverter connected between the node and the gate electrodes of the electrostatic discharge transistors,wherein the gate electrodes of the electrostatic discharge transistors are commonly connected to an output terminal of the inverter only through connection lines and contact nodes between the gate electrodes and the output terminal, andwherein the gate electrodes of all of the electrostatic discharge transistors are directly connected together.