Liquid crystal display panel and liquid crystal display apparatus having the same
View Patent ↗Disclosed are a liquid crystal display panel and apparatus, which can prevent electrolytic corrosion or other corrosion of on-off pads in a test pad part. The liquid crystal display panel comprises: a pixel part having a plurality of pixels arranged in a matrix at intersections of a plurality of gate lines and a plurality of data lines; a gate pad part having a plurality of gate pads, each of the gate pads connected with the corresponding gate lines to deliver a gate signal; a data pad part having a plurality of data pads, each of the data pads connected with the corresponding data lines to deliver a data signal; a test pad part having at least one or more on-off pads delivering a test signal to the gate lines or the data lines; and a switching device for cutting off the gate signal and/or the data signal so as not to be provided to the on-off pads upon driving the liquid crystal display panel.
1. A liquid crystal display panel, comprising:
a pixel part having a plurality of pixels arranged in a matrix at intersections of a plurality of gate lines and a plurality of data lines;
a gate pad part having a plurality of gate pads, each of the gate pads connected with the corresponding gate lines to deliver a gate signal;
a data pad part having a plurality of data pads, each of the data pads connected with the corresponding data lines to deliver a data signal;
a test pad part having at least one or more on-off pads delivering a test signal to the gate lines or the data lines; and
a switching device for cutting off the gate signal and/or the data signal so as not to be provided to the on-off pads upon driving the liquid crystal display panel.
2. The liquid crystal display panel of claim 1 , wherein the switching device is formed on a test line connected to the at least one or more on-off pads.
3. The liquid crystal display panel of claim 2 , wherein the switching of the switching device connected to the at least one or more on-off pads is controlled by a single control signal.
4. The liquid crystal display panel of claim 2 , wherein the switching of the switching device connected to the at least one or more on-off pads is controlled by corresponding control signals.
5. The liquid crystal display panel of claim 1 , wherein the switching device allows a gate test signal or a data test signal input through the on-off pads to pass through at the time of an on/off test of the liquid crystal display panel.
6. The liquid crystal display panel of claim 1 , wherein the switching device is a thin film transistor.
7. The liquid crystal display panel of claim 1 , wherein the test pad part comprises:
a gate test pad part for delivering a gate test signal to the gate lines and a data test pad part for delivering a data test signal to the data lines, and
the switching device is formed between gate and data driving circuits for providing a gate signal and a data signal to the corresponding gate and data pad parts and the gate and data test pad parts, respectively.
8. The liquid crystal display panel of claim 7 , wherein the switching device is controlled by a control signal applied from the data driving circuit.
9. A liquid crystal display apparatus, comprising:
a source driver for applying a data signal to data lines;
a gate driver for applying a gate signal to gate lines; and
a liquid crystal display panel for displaying data through unit pixels in response to the gate signal and the data signal,
wherein the liquid crystal display panel further comprises:
a pixel part having a plurality of pixels arranged in a matrix at intersections of a plurality of gate lines and a plurality of data lines;
a gate pad part having a plurality of gate pads, each of the gate pads connected with the corresponding gate lines to deliver a gate signal;
a data pad part having a plurality of data pads, each of the data pads connected with the corresponding data lines to deliver a data signal;
a test pad part having at least one or more on-off pads delivering a test signal to the gate lines or the data lines; and
a switching device for cutting off the gate signal and/or the data signal so as not to be provided to the on-off pads upon driving the liquid crystal display panel.
10. The liquid crystal display apparatus of claim 9 , wherein the switching device is formed on a test line connected to the at least one or more on-off pads.
11. The liquid crystal display apparatus of claim 10 , wherein the switching of the switching device connected to the at least one or more on-off pads is controlled by a single control signal.
12. The liquid crystal display apparatus of claim 10 , wherein the switching of the switching device connected to the at least one or more on-off pads is controlled by corresponding control signals.
13. The liquid crystal display apparatus of claim 9 , wherein the switching device allows a gate test signal or a data test signal input through the on-off pads to pass through at the time of an on/off test of the liquid crystal display panel.
14. The liquid crystal display panel of claim 9 , wherein the switching device is a thin film transistor.