DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY, AND METHOD THEREOF
First Claim
1. A liquid crystal display comprising:
- a liquid crystal panel assembly including a plurality of sensing data lines, a plurality of variable capacitors that have capacitance that changes by pressure and are connected to the sensing data lines, and a plurality of reference capacitors connected to the sensing data lines; and
a plurality of sensing signal output parts formed separately from the liquid crystal panel assembly and respectively connected to the sensing data lines to generate an output signal based on a sensing data signal flowing through the sensing data line.
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Abstract
The present invention relates to a liquid crystal display (“LCD”) that includes a liquid crystal panel assembly including sensing data lines, variable capacitors having a capacitance changed by pressure and connected to the sensing data lines, and reference capacitors connected to the sensing data lines, and a plurality of sensing signal output parts formed separately from the liquid crystal panel assembly and respectively connected to the sensing data lines to generate an output signal based on a sensing data signal flowing through the sensing data lines. Each of the sensing signal output parts includes an output transistor connected to each of the sensing data lines, while the output transistor includes a metal oxide semiconductor (“MOS”) transistor that has better performance, smaller size, and lower power consumption than a thin film transistor (“TFT”).
47 Citations
25 Claims
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1. A liquid crystal display comprising:
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a liquid crystal panel assembly including a plurality of sensing data lines, a plurality of variable capacitors that have capacitance that changes by pressure and are connected to the sensing data lines, and a plurality of reference capacitors connected to the sensing data lines; and a plurality of sensing signal output parts formed separately from the liquid crystal panel assembly and respectively connected to the sensing data lines to generate an output signal based on a sensing data signal flowing through the sensing data line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A display device comprising:
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a plurality of first sensing data lines extended in a first direction; a plurality of second sensing data lines having different lengths from each other and extended in a second direction different from the first direction; a plurality of sensors connected to the first and second sensing data lines and having an output signal that changes according to a touch from an exterior; and a plurality of compensation capacitors formed on each of the second sensing data lines, wherein, in each second sensing data line, a ratio of a parasitic capacitance of a parasitic capacitor to a compensation capacitance of a compensation capacitor is substantially identical. - View Dependent Claims (14, 15, 16, 17)
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18. A display device comprising:
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a plurality of first sensing data lines extended in a first direction; a plurality of second sensing data lines extended in a second direction different from the first direction; a plurality of sensors connected to the first and second sensing data lines and having an output signal changed according to a touch from an exterior; a plurality of first sensing signal output parts respectively connected to the first sensing data lines to generate an output signal based on a sensing data signal flowing through the first sensing data lines; a plurality of second sensing signal output parts respectively connected to the second sensing data lines to generate an output signal based on a sensing data signal flowing through the second sensing data lines; a plurality of first output data lines having a same length as each other and transmitting a sensing signal outputted from the first sensing signal output parts to the exterior; a plurality of second output data lines having different lengths from each other and transmitting a sensing signal outputted from the second sensing signal output parts to the exterior; and a plurality of compensation capacitors respectively formed on the second output data lines, wherein, in each second output data line, a ratio of a parasitic capacitance of a parasitic capacitor and a compensation capacitance of a compensation capacitor is substantially identical. - View Dependent Claims (19, 20, 21)
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22. A method of reducing power consumption in a display device capable of determining a screen touch position, the method comprising:
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providing sensing data lines within a liquid crystal panel assembly of the display device; connecting sensors to the sensing data lines; forming sensing signal output parts separately from the liquid crystal panel assembly; and
,connecting the sensing signal output parts to the sensing data lines, respectively, to generate an output signal based on a sensing data signal flowing through the sensing data lines. - View Dependent Claims (23, 24)
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25. A method of improving a signal to noise ratio in a display device capable of determining a screen touch position, the display device having first sensing data lines extended in a first direction, and second sensing data lines having different lengths from each other extended in a second direction different from the first direction, the method comprising:
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forming a compensation capacitor on each of the second sensing data lines; and
,providing a substantially identical ratio of a parasitic capacitance of a parasitic capacitor to a compensation capacitance of the compensation capacitor in each of the second sensing data lines.
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Specification