Liquid crystal display device and method of manufacturing the same

Abstract

An LCD device includes a plurality of gate lines and data lines cross-arranged on a lower substrate to define a plurality of pixels, a pixel electrode disposed in each of the pixels, a plurality of common electrode blocks pattern-formed that generate an electric field with the pixel electrode and sensing a touch of a user, a plurality of sensing lines, a plurality of pad parts arranged to be separated from each other at predetermined intervals along a corresponding sensing line, and having a line width thicker than the sensing line, and a contact part disposed between a corresponding pad part and a corresponding common electrode block, and electrically connecting a corresponding sensing line and the common electrode block. When the sensing lines are electrically connected to one of the common electrode blocks, the sensing lines are electrically insulated from the other common electrode blocks.

What is claimed is: 
     
       1. A liquid crystal display (LCD) device, comprising:
 a plurality of gate lines and data lines cross-arranged on a lower substrate to define a plurality of pixels; 
 a pixel electrode in each of the pixels; 
 a plurality of common electrode blocks pattern-formed that generate an electric field with the pixel electrode and sensing a touch of a user; 
 a plurality of sensing lines, wherein when the sensing lines are electrically connected to one of the common electrode blocks, the sensing lines are electrically insulated from the other common electrode blocks; 
 a plurality of pad parts arranged to be separated from each other at predetermined intervals along a corresponding sensing line, and having a line width thicker than the sensing line; and 
 a contact part disposed between a corresponding pad part and a corresponding common electrode block, and electrically connecting a corresponding sensing line and the common electrode block, 
 wherein the contact part is formed to contact at least one or more of a plurality of the pad parts comprised in a corresponding sensing line which is electrically connected to one of the common electrode blocks. 
 
     
     
       2. The LCD device of  claim 1 , wherein a pad part disposed in a corresponding sensing line is arranged at a position symmetric with a pad part formed in a sensing line adjacent to the corresponding sensing line. 
     
     
       3. The LCD device of  claim 1 , wherein each of the sensing lines overlaps a corresponding data line or a corresponding gate line. 
     
     
       4. The LCD device of  claim 1 , wherein each of the sensing lines is disposed in a direction parallel to a corresponding data line or a direction parallel to a corresponding gate line. 
     
     
       5. The LCD device of  claim 1 , wherein each of the pad parts has a constant line width irrespective of whether each pad part is electrically connected to the contact part. 
     
     
       6. The LCD device of  claim 1 , wherein the contact part is disposed in a non-transmissive area, for preventing a reduction in an aperture ratio. 
     
     
       7. The LCD device of  claim 1 , wherein the common electrode blocks are disposed on the pixel electrode with a second protective layer therebetween, and comprises at least one slit. 
     
     
       8. The LCD device of  claim 1 , wherein the pixel electrode is disposed on the common electrode block with a second protective layer therebetween, and comprises at least one slit. 
     
     
       9. The LCD device of  claim 1 , wherein a multiplexer is connected to a distal end of each of the sensing lines. 
     
     
       10. A method of manufacturing a liquid crystal display (LCD) device, comprising:
 sequentially forming a gate electrode, a gate dielectric, a semiconductor layer, a source electrode, a drain electrode, and a first protective layer on a lower substrate; and 
 forming a pixel electrode electrically connected to the drain electrode, a plurality of common electrode blocks pattern-formed for generating an electric field with the pixel electrode and sensing a touch of a user, a plurality of sensing lines, a plurality of pad parts formed to be separated from each other at predetermined intervals along a corresponding sensing line and having a line width thicker than the sensing line, and a contact part formed between a corresponding pad part and a corresponding common electrode block and electrically connecting a corresponding sensing line and the common electrode block, wherein when the sensing lines are electrically connected to one of the common electrode blocks, the sensing lines are electrically insulated from the other common electrode blocks, 
 wherein the contact part is formed to contact at least one or more of a plurality of the pad parts that are formed in an area overlapping a corresponding common electrode block and a corresponding sensing line are electrically connected. 
 
     
     
       11. A display device, comprising:
 a plurality of gate lines, a plurality of data lines crossing the gate lines, and a plurality of pixel electrodes in a display panel;   a plurality of common electrode blocks, the common electrode blocks including a first common electrode block configured to generate an electric field with at least one of the pixel electrodes and to sense a touch;   a plurality of sensing lines, the sensing lines including a first sensing line electrically connected to the first common electrode block and insulated from the other common electrode blocks in an area of the display panel where the other common electrode blocks are disposed, the first sensing line having a first pad part; and   a first contact part electrically connected between the first pad part and the first common electrode block to electrically connect the first sensing line to the first common electrode block,   wherein the first contact part contacts the first pad part.    
     
     
       12. The display device of claim 11, wherein the first sensing line includes a plurality of pad parts, including the first pad part, the pad parts being wider than other parts of the first sensing line.  
     
     
       13. The display device of claim 12, wherein each of the pad parts has a same width irrespective of whether the respective pad part contacts the first contact part.  
     
     
       14. The display device of claim 12, further comprising a plurality of contact parts, including the first contact part,
 wherein each of the contact parts contacts a corresponding one of the pad parts of the first sensing line to electrically connect the first sensing line to the first common electrode block.    
     
     
       15. The display device of claim 14, wherein at least one of the pad parts of the first sensing line does not contact any of the contact parts.  
     
     
       16. The LCD device of claim 11, wherein the first contact part is connected directly between the first pad part and the first common electrode block.  
     
     
       17. The display device of claim 11, wherein each of the sensing lines overlaps a corresponding one of the data lines or a corresponding one of the gate lines.  
     
     
       18. The display device of claim 11, wherein each of the sensing lines is disposed in a direction parallel to a corresponding one of the data lines or a direction parallel to a corresponding one of the gate lines.  
     
     
       19. The display device of claim 11, wherein the first contact part is disposed in a non-transmissive area of the display panel to prevent a reduction in an aperture ratio.  
     
     
       20. The display device of claim 11, further comprising a first protective layer,
 wherein the first protective layer is on the first common electrode block, and the first sensing line is on the first protective layer.    
     
     
       21. The display device of claim 11, further comprising a first protective layer,
 wherein the first protective layer is on the first sensing line, and the first common electrode block is on the first protective layer.    
     
     
       22. The display device of claim 11, further comprising a second protective layer,
 wherein the first common electrode block is on the second protective layer, and the second protective layer is on the at least one of the pixel electrodes, and   wherein the first common electrode block includes at least one slit.    
     
     
       23. The display device of claim 11, further comprising a second protective layer,
 wherein the at least one of the pixel electrodes is on the second protective layer, and the second protective layer is on the first common electrode block, and   wherein the at least one of the pixel electrodes includes at least one slit.    
     
     
       24. The display device of claim 11, wherein the first sensing line is formed of a material having a lower resistivity than a material of the first common electrode block.  
     
     
       25. The display device of claim 11, further comprising a high-resistance conductive layer on the display panel,
 wherein the high-resistance conductive layer includes a transparent material and is formed of a conductive material.    
     
     
       26. The display device of claim 11, further comprising a multiplexer and a sensing circuit,
 wherein the multiplexer is coupled between the sensing lines and the sensing circuit.    
     
     
       27. The display device of claim 11, further comprising a sensing circuit configured to detect a signal from the first common electrode block through the first sensing line to sense a touch.  
     
     
       28. The display device of claim 11, wherein the sensing lines include a second sensing line overlapping with the first common electrode block and insulated from the first common electrode block in an area of the first common electrode block, and
 wherein the common electrode blocks include a second common electrode block, the second common electrode block being electrically connected with the second sensing line.