Liquid crystal display device having improved touch screen
First Claim
11. The liquid crystal display of claim 10, wherein the integrator comprises an amplifier and a capacitor.
2 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display having a touch screen includes a plurality of sensing data lines formed on a display panel, a plurality of variable capacitors connected to the sensing data lines and having capacitance that varies with a pressure, a plurality of reference capacitors connected to the sensing data lines, and a plurality of sensing signal output units each connected to the sensing data lines for generating output signals on the basis of sensing data signals that flow through the sensing data lines. The sensing signal output units change the amount of current based on the sensing data signals to reduce current corresponding to the output signals.
123 Citations
24 Claims
-
11. The liquid crystal display of claim 10, wherein the integrator comprises an amplifier and a capacitor.
-
12. A display device comprising:
-
a plurality of pixels;
a plurality of sensing data lines formed among the pixels;
a plurality of sensing units for changing magnitudes of sensing data signals to be output to the sensing data lines on the basis of capacitance that varies with an applied pressure; and
a plurality of sensing signal output units each connected to the sensing data lines for generating output signals on the basis of the sensing data signals that flow through the sensing data lines, wherein the sensing signal output units each change amounts of current based on the sensing data signals to reduce amounts of current corresponding to the output signals. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 9, 19, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23)
-
-
19-1. The display device of claim 16, wherein the first reset control signal has a turn-on voltage application time different from the second reset control signal.
-
24. A liquid crystal display having a touch screen, comprising
a plurality of periodically scanned pixels; -
a matrix of variable capacitors formed among the pixels whose capacitance varies with pressure applied to the screen;
a plurality of sensing data lines connected to the capacitors;
means for periodically applying charging and reset voltages to the sensing data lines during a porch period of scanning;
a current integrator connected to each of the sensing data lines for generating an output current only during the time between the applying of the charging and reset voltages to the sensing data lines during the porch period; and
means for disabling wherein the sensing signal output units each change amounts of current based on the sensing data signals to reduce amounts of current corresponding to the output signals.
-
Specification