Liquid crystal display device including inspection circuit and inspection method thereof
AssigneeLG Display Co., Ltd.
InventorMoonJung Choi
Life of this patent
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Abstract
Disclosed is an LCD device having a structure such as a column inversion type or a Z-inversion type where a single data line can be shared by two neighboring pixels, and an inspection circuit and method thereof. The inspection circuit for outputting gate driving signals in a division manner into odd and even-numbered signals is provided between the gate driving unit and a pixel region, so that only color pixels to be inspected can be driven. This can allow pixels to be normally inspected in an LCD device having an enhanced column inversion structure.
Claims6
A liquid crystal display (LCD) device, comprising:
- an LC panel having a plurality of gate lines and data lines crossing each other, and having a plurality of pixels defined at the crossing points;
- a gate driving unit mounted at side of the LC panel, and configured to output a gate driving signal to the gate lines;
- a data driving unit configured to output a data signal to the data lines;
- and
- an inspection circuit unit formed between the gate lines and the gate driving unit and configured to output gate driving signals to the odd-numbered gate lines in correspond to a first inspection signal and to the even-numbered gate lines in correspond to a second inspection signal in an alternative manner in an inspection mode,
- wherein the plurality of pixels are configured such that neighboring pixels on the same vertical line are connected to different data lines,
- wherein the first inspection signal is applied, first nodes connected to the odd-numbered gate lines are charged and second nodes connected to the even-numbered gate lines are discharged.
An inspection method of a liquid crystal display (LCD) device having an inspection circuit unit on an LC panel, the inspection circuit unit formed between gate lines of the LC panel and a gate driving unit, and the inspection circuit unit configured to output gate driving signals in an alternating manner in the unit of odd-numbered or even-numbered gate lines, in correspondence to inspection control signals in an inspection mode, the method comprising:
- applying a first inspection signal to first nodes connected to the odd-numbered gate lines for a ½ frame;
- applying full-gray data signals to data lines connected to pixels corresponding to a single color, among pixels connected to the odd-numbered gate lines;
- applying a second inspection signal to a second nodes connected to the odd-numbered gate lines for a ½ frame;
- and
- applying full-gray data signals to data lines connected to the pixels corresponding to a single color, among pixels connected to the even-numbered gate lines.
Dependencies are inferred from the claim text.