LCD panel, LCD including same, and driving method thereof
Disclosed is an LCD panel, an LCD including the LCD panel, and a driving method for high-speed responses. The present invention comprises a plurality of gate lines; a plurality of data lines; a common electrode line formed in the horizontal direction with vertical branches, and formed at a predetermined area between a gate line and its adjacent gate line; a first pixel electrode formed at an odd row of an odd column and even row of an even column among an area formed by a the data line and a gate line; and a second pixel electrode formed at an odd row of an even column and an even row of an odd column of the area, and having a polarity different from the first pixel electrode.
1. A method for driving a liquid crystal display including a top substrate common electrode a plurality of gate lines, a plurality of data lines, a plurality of common electrode lines arranged alternately between the plurality of gate lines, a plurality of pixels connected to the plurality of gate lines and the plurality of data lines and arranged in a matrix, said method comprising:
applying a first data voltage of a first polarity to the plurality of data lines;
providing a first scanning signal for odd pixels in an odd row and even pixels in an even row;
applying a second data voltage of a second polarity opposite to the first polarity to the plurality of data lines;
providing a second scanning signal for odd pixels in an even row and even pixels in an odd row;
supplying the common electrode lines with a swinging common electrode voltage; and
supplying an overshoot voltage to a voltage applied to each pixel in response to the first data voltage and the second data voltage upon a variation of a level of the swinging common electrode voltage, wherein a level of the voltage applied to each pixel is varied in response to the overshoot voltage.
2. The method for driving the liquid crystal display of claim 1 , wherein the swinging common electrode voltage has a square waveform having a same period as the first scanning signal and the second scanning signal.
3. The method for driving the liquid crystal display of claim 1 , wherein the swinging common electrode voltage has a square waveform having a three times longer period than the first scanning signal and the second scanning signal.
4. The method for driving the liquid crystal display of claim 1 , wherein the overshoot voltage is determined as:
V
overshot
=
Δ
V
com
·
C
st
(
C
lc2
-
C
lc1
)
2
(
C
st
+
C
lc1
)
·
(
C
st
+
C
lc2
)
where V com represents the swinging common electrode voltage, C lc1 and C lc2 capacitances of a liquid crystal capacitor at the first grey state and the second grey state, respectively, C st represents a storage capacitance.
5. A method for driving a liquid crystal display including a plurality of gate lines, a plurality of data lines, a plurality of common electrode lines arranged alternately between the plurality of gate lines, a plurality of pixels connected to the plurality of gate lines and the plurality of data lines and arranged in a matrix, said method comprising:
applying a first data voltage of a first polarity to the plurality of data lines;
providing a first scanning signal for odd pixels in an odd row and even pixels in an even row;
applying a second data voltage of a second polarity opposite to the first polarity to the plurality of data lines;
providing a second scanning signal for odd pixels in an even row and even pixels in an odd row; and
supplying the common electrode lines with a swinging common electrode voltage;
wherein a swing amplitude of the swinging common electrode voltage is established as:
Δ
V
com
=
2
(
V
max
+
V
th
)
(
C
st
+
C
Ic
-
black
)
(
C
st
+
C
Ic
-
white
)
C
st
(
2
C
st
+
C
Ic
-
white
+
C
Ic
-
black
)
where V max represents the maximum value of the actual voltage sensed by a liquid crystal, V th represents the minimum value of the actual voltage sensed by the liquid crystal, C lc represents a liquid crystal capacitance. C st , represents a storage capacitance, C lc-white represents the liquid crystal capacitance in a black mode, and C lc-white represents the liquid crystal capacitance in a white mode.
6. A method for driving a liquid crystal display including a top substrate common electrode, a plurality of gate lines, a plurality of data lines, a plurality of common electrode lines arranged alternately between the plurality of gate lines, a plurality of first pixels and a plurality of second pixels connected to the plurality of gate lines and the plurality of data lines and arranged alternately in rows and columns, said method comprising:
applying a first data voltage of a first polarity to the plurality of data lines;
providing a first scanning signal for odd pixels in an odd row and even pixels in an even row;
applying a second data voltage of a second polarity opposite to the first polarity to the plurality of data lines;
providing a second scanning signal for odd pixels in an even row and even pixels in an odd row;
supplying the common electrode lines with a swinging common electrode voltage; and
supplying an overshoot voltage to a voltage applied to each pixel in response to the first data voltage and the second data voltage upon a variation of a level of the swinging common electrode voltage, wherein a level of the voltage applied to each pixel is varied in response to the overshoot voltage.
7. The method of claim 6 , wherein the swinging common electrode voltage has a square waveform having a same period as the first scanning signal and the second scanning signal.
8. The method of claim 6 , wherein the swinging common electrode voltage has a square waveform having a period three times longer than the first scanning signal and the second scanning signal.
9. The method for driving the liquid crystal display of claim 6 , wherein the overshoot voltage is determined as:
V
overshot
=
Δ
V
com
·
C
st
(
C
lc2
-
C
lc1
)
2
(
C
st
+
C
lc1
)
·
(
C
st
+
C
lc2
)
where V com represents the swinging common electrode voltage, C lc1 and C lc2 capacitances of a liquid crystal capacitor at the first grey state and the second grey state, respectively, C st represents a storage capacitance.
10. A method for driving a liquid crystal display including a plurality of gate lines, a plurality of data lines, a plurality of common electrode lines arranged alternately between the plurality of gate lines, a plurality of first pixels and a plurality of second pixels connected to the plurality of gate lines and the plurality of data lines and arranged alternately in rows and columns, said method comprising:
applying a first data voltage of a first polarity to the plurality of data lines;
providing a first scanning signal to the plurality of first pixels in pairs of neighboring rows;
applying a second data voltage of a second polarity opposite to the first polarity to the plurality of data lines;
providing a second scanning signal to the plurality of second pixels in pairs of neighboring rows; and
supplying the common electrode lines with a swinging common electrode voltage;
a swing amplitude of the swinging common electrode voltage is established as:
Δ
V
com
=
2
(
V
max
+
V
th
)
(
C
st
+
C
Ic
-
black
)
(
C
st
+
C
Ic
-
white
)
C
st
(
2
C
st
+
C
Ic
-
white
+
C
Ic
-
black
)
where V max represents the maximum value of the actual voltage sensed by a liquid crystal, V th represents the minimum value of the actual voltage sensed by the liquid crystal, C lc represents a liquid crystal capacitance, C st represents a storage capacitance, C lc-block represents the liquid crystal capacitance in a black mode, and C lc-block represents the liquid crystal capacitance in a white mode.