Liquid crystal display device having touch screen function and method of fabricating the same
First Claim
1. An LCD device having a touch screen function, comprising:
- a plurality of gate lines that transfer scan signals;
a plurality of data lines that intersect the gate lines;
a detecting switching element that is formed in each of a plurality of pixel regions defined by the gate lines and the data lines, providing detecting signals that detect any change in cell gap in each of the pixel regions; and
a plurality of detecting signal lines that transfer the detecting signals from the detecting switching elements.
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Abstract
The present invention relates to an LCD device having a touch screen function. The LCD device of the present invention includes a plurality of gate lines, a plurality of data lines intersecting the gate lines, and a plurality of signal lines that are insulated from and juxtaposed with the data lines. First to third switching elements are formed in each of a plurality of pixel regions in the form of a matrix, which are surrounded by the gate lines and the data lines. Here, a gate electrode of the first switching element is connected to a gate line Gn, a source electrode thereof is connected to the data line, and a drain electrode thereof is connected to a pixel electrode. Further, liquid crystal capacitance and storage capacitance are formed between the pixel electrode and a common electrode. At this time, the liquid crystal capacitance is changed due to variation in the liquid crystal cell gap. The second and third switching elements are designed to read variation in the liquid crystal capacitance. A source electrode of the second switching element is connected to the pixel electrode, a drain electrode thereof is connected to the signal line, and a gate electrode thereof is connected to a previous gate line Gn-1. Furthermore, a source electrode of the third switching element is connected to the data line, a drain electrode thereof is connected to the pixel electrode, and a gate electrode thereof is connected to a second previous gate line Gn-2. Each signal line is connected to each signal amplifier.
148 Citations
11 Claims
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1. An LCD device having a touch screen function, comprising:
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a plurality of gate lines that transfer scan signals; a plurality of data lines that intersect the gate lines; a detecting switching element that is formed in each of a plurality of pixel regions defined by the gate lines and the data lines, providing detecting signals that detect any change in cell gap in each of the pixel regions; and a plurality of detecting signal lines that transfer the detecting signals from the detecting switching elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An LCD device having a touch screen function, comprising:
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a plurality of gate lines that transfer scan signals; a plurality of data lines that intersect the gate lines; detecting switching elements that provide detecting signals that detect any change in cell gap in each of a plurality of pixel regions defined by the gate lines and the data lines; and a plurality of detecting signal lines that transfer the detecting signals from the detecting switching elements. - View Dependent Claims (10, 11)
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Specification