ELECTRO-OPTICAL DEVICE, DRIVING CIRCUIT OF ELECTRO-OPTICAL DEVICE, AND ELECTRONIC APPARATUS
A driving circuit of an electro-optical device includes scanning lines, data lines, capacitor lines respectively corresponding to the scanning lines, and pixels provided at intersections of the scanning lines and the data lines. The driving circuit includes a scanning line driving circuit that selects the scanning lines in a predetermined order and a capacitor line driving circuit that selects a first power supply line when a first scanning line is selected and selects a second power supply line when a second scanning line that is spaced predetermined lines away from the first scanning line is selected until the first scanning line is selected again to thereby apply a voltage of the selected one of the power supply lines to the capacitor line, the capacitor line driving circuit applying the voltage of the second power supply line to all the capacitor lines when all the scanning lines are not selected.
1 . A driving circuit of an electro-optical device that includes a plurality of scanning lines, a plurality of data lines, a plurality of capacitor lines, and pixels, wherein the plurality of capacitor lines are respectively provided in correspondence with the plurality of scanning lines, wherein the pixels are provided at positions corresponding to intersections of the plurality of scanning lines and the plurality of data lines, wherein each of the pixels includes a pixel switching element, a pixel capacitor and a storage capacitor, wherein the pixel switching element is connected to a corresponding one of the data lines, a corresponding one of the scanning lines and a pixel electrode, wherein, when the connected corresponding one of the scanning lines is selected, the pixel electrode enters a conductive state with the corresponding one of the data lines, wherein the pixel capacitor is connected between the pixel electrode and a common electrode, wherein the storage capacitor is connected between the pixel electrode and a corresponding one of the capacitor lines, provided in correspondence with the corresponding one of the scanning lines, the driving circuit comprising:
a scanning line driving circuit that selects the scanning lines in a predetermined order;
a capacitor line driving circuit that, for the capacitor line provided in correspondence with one of the scanning lines, selects a first power supply line when the one of the scanning lines is selected and selects a second power supply line since a scanning line, which is spaced predetermined lines away from the one of the scanning lines and selected after the one of the scanning lines, is selected until the one of the scanning lines is selected again to thereby apply a voltage of the selected one of the power supply lines to the capacitor line, while the capacitor line driving circuit applies the voltage of the second power supply line to all the capacitor lines in a period during which all the scanning lines are not selected; and
a data line driving circuit that supplies the pixels corresponding to the selected one of the scanning lines with data signals corresponding to gray scales of the pixels through the respective data lines.
2 . The driving circuit of the electro-optical device according to claim 1 , wherein
the electro-optical device is configured to be selectable between a full-screen display mode in which a full screen is set as a display area and a partial display mode in which part of area in the full screen is set as a display area and the other area is set as a non-display area, and wherein
the capacitor line driving circuit, in the partial display mode, applies the voltage of the second power supply line to all the capacitor lines in a period during which all the scanning lines are not selected.
3 . The driving circuit of the electro-optical device according to claim 1 , wherein
the capacitor line driving circuit includes first to fifth transistors in correspondence with each of the capacitor lines, wherein
the first transistor corresponding to one of the capacitor lines has a gate electrode connected to a scanning line that is spaced predetermined lines away from the scanning line corresponding to the one of the capacitor lines and a source electrode connected to an on voltage supply line that supplies an on voltage to make the fourth transistor enter an on state, wherein
the second transistor has a gate electrode connected to the scanning line corresponding to the one of the capacitor lines and a source electrode connected to an off voltage supply line that supplies an off voltage to make the fourth transistor enter an off state, wherein
the third transistor has a gate electrode connected to the scanning line corresponding to the one of the capacitor lines and a source electrode connected to the first power supply line, wherein
the fourth transistor has a gate electrode connected commonly to both a drain electrode of the first transistor and a drain electrode of the second transistor and a source electrode connected to the second power supply line, wherein
the fifth transistor has a gate electrode connected to an on/off voltage supply line that supplies an on voltage or an off voltage to make the fifth transistor itself enter an on state or an off state and a source electrode connected to the second power supply line, wherein
a drain electrode of the third transistor, a drain electrode of the fourth transistor and a drain electrode of the fifth transistor are connected to the one of the capacitor lines, and wherein
a voltage of the on/off voltage supply line is controlled to be applied with the on voltage in a period during which all the scanning lines are not selected.
4 . The driving circuit of the electro-optical device according to claim 1 , wherein the voltage of the first power supply line and the voltage of the second power supply line are set so that, when a scanning line, which is spaced predetermined lines away from the scanning line corresponding to one of the capacitor lines, is selected, a voltage of the one of the capacitor lines varies.
5 . The driving circuit of the electro-optical device according to claim 4 , wherein
the voltage of the first power supply line is alternately switched at predetermined cycles between different two voltages, and wherein
the voltage of the second power supply line is constant.
6 . The driving circuit of the electro-optical device according to claim 1 , further comprising:
a correction circuit that, when the one of the scanning lines is selected, supplies the first power supply line with a voltage signal by which a detection voltage of the capacitor line corresponding to the one of the scanning lines becomes a target voltage.
7 . An electro-optical device comprising:
a plurality of scanning lines;
a plurality of data lines;
a plurality of capacitor lines that are respectively provided in correspondence with the plurality of scanning lines;
pixels that are provided at positions corresponding to intersections of the plurality of scanning lines and the plurality of data lines, wherein each of the pixels includes a pixel switching element, a pixel capacitor and a storage capacitor, wherein the pixel switching element is connected to a corresponding one of the data lines, a corresponding one of the scanning lines and a pixel electrode, wherein, when the connected corresponding one of the scanning lines is selected, the pixel electrode enters a conductive state with the corresponding one of the data lines, wherein the pixel capacitor is connected between the pixel electrode and a common electrode, wherein the storage capacitor is connected between the pixel electrode and a corresponding one of the capacitor lines, provided in correspondence with the corresponding one of the scanning lines;
a scanning line driving circuit that selects the scanning lines in a predetermined order;
a capacitor line driving circuit, for the capacitor line provided in correspondence with one of the scanning lines, selects a first power supply line when the one of the scanning lines is selected and selects a second power supply line since a scanning line, which is spaced predetermined lines away from the one of the scanning lines and selected after the one of the scanning lines, is selected until the one of the scanning lines is selected again to thereby apply a voltage of the selected one of the power supply lines to the capacitor line, while the capacitor line driving circuit applies the voltage of the second power supply line to all the capacitor lines in a period during which all the scanning lines are not selected; and
a data line driving circuit that supplies the pixels corresponding to the selected one of the scanning lines with data signals corresponding to gray scales of the pixels through the respective data lines.
8 . A driving circuit of an electro-optical device that includes a plurality of rows of scanning lines, a plurality of columns of data lines, capacitor lines, and pixels, wherein the capacitor lines are respectively provided in correspondence with the plurality of rows of scanning lines, wherein the pixels are provided at positions corresponding to intersections of the plurality of rows of scanning lines and the plurality of columns of data lines, wherein each of the pixels includes a pixel switching element, a pixel capacitor, and a storage capacitor, wherein one terminal of the pixel switching element is connected to a corresponding one of the data lines and, when a corresponding one of the scanning lines is selected, the pixel switching element enters a conductive state between the one terminal and the other terminal, wherein one terminal of the pixel capacitor is connected to the other terminal of the pixel switching element, and the other terminal of the pixel capacitor is connected to a common electrode, wherein the storage capacitor is connected between the one terminal of the pixel capacitor and the capacitor line corresponding to the corresponding one of the scanning lines, the driving circuit comprising:
a scanning line driving circuit that selects the scanning lines in a predetermined order;
a capacitor line driving circuit that connects the capacitor line provided in correspondence with one of the scanning lines to a first power supply line when the one of the scanning lines is selected, and that continues to connect the capacitor line to a second power supply line after the selection is completed; and
a data line driving circuit that supplies the pixels corresponding to the selected one of the scanning lines with data signals corresponding to gray scales of the pixels through the respective data lines, wherein
a voltage of the first power supply line, when the one of the scanning lines is selected, is set to be different from a voltage of the second power supply line.
9 . The driving circuit of the electro-optical device according to claim 8 , wherein
the voltage of the first power supply line is alternately switched at predetermined intervals between two different voltages, and wherein
the voltage of the second power supply line is constant.
10 . The driving circuit of the electro-optical device according to claim 9 , wherein the voltage of the second power supply line is set to an intermediate value between the two voltages of the first power supply line.
11 . The driving circuit of the electro-optical device according to claim 8 , wherein
the capacitor line driving circuit includes a first transistor, a second transistor, a third transistor and a fourth transistor in correspondence with each of the plurality of rows of capacitor lines, wherein
the first transistor corresponding to one of the capacitor lines has a gate electrode connected to a gate control line and a source electrode connected to an on voltage supply line that supplies an on voltage to make the fourth transistor enter an on state, wherein
the second transistor has a gate electrode connected to the scanning line corresponding to the one of the capacitor lines and a source electrode connected to an off voltage supply line that supplies an off voltage to make the fourth transistor enter an off state, wherein
the third transistor has a gate electrode connected to the scanning line corresponding to the one of the capacitor lines and a source electrode connected to the first power supply line, wherein
the fourth transistor has a gate electrode connected commonly to both a drain electrode of the first transistor and a drain electrode of the second transistor and a source electrode connected to the second power supply line, and wherein
a drain electrode of the third transistor and a drain electrode of the fourth transistor are connected to the one of the capacitor lines.
12 . The driving circuit of the electro-optical device according to claim 11 , wherein
the driving circuit includes a plurality of sets of the first transistor, the second transistor and the fourth transistor in correspondence with one of the capacitor lines, and wherein
the fourth transistor that connects the one of the capacitor lines to the second power supply line is switched among the plurality of sets in a predetermined order.
13 . The driving circuit of the electro-optical device according to claim 11 , wherein
the capacitor line driving circuit further includes a fifth transistor in correspondence with each of the plurality of rows of capacitor lines, and wherein
the fifth transistor corresponding to one of the capacitor lines has a gate electrode connected to a scanning line that is selected next with respect to the scanning line corresponding to the one of the capacitor lines, a source electrode connected to the on voltage supply line and a drain electrode connected to both a drain electrode of the first transistor and a drain electrode of the second transistor.
14 . The driving circuit of the electro-optical device according to claim 11 , further comprising:
an operational amplifier; and
a sixth transistor that is provided in correspondence with each of the plurality of rows of capacitor lines, wherein
the sixth transistor corresponding to one of the capacitor lines has a gate electrode connected to the scanning line corresponding to the one of the capacitor lines, a source electrode connected to the one of the capacitor lines and a drain electrode connected to a detection line, and wherein
the operational amplifier controls the voltage of the first power supply line so that a voltage of the detection line, when the one of the scanning lines is selected, becomes a target voltage.
15 . An electro-optical device comprising:
a plurality of rows of scanning lines;
a plurality of columns of data lines;
capacitor lines that are respectively provided in correspondence with the plurality of rows of scanning lines; and
pixels that are provided at positions corresponding to intersections of the plurality of rows of scanning lines and the plurality of columns of data lines, wherein each of the pixels includes a pixel switching element, a pixel capacitor, and a storage capacitor, wherein one terminal of the pixel switching element is connected to a corresponding one of the data lines and, when a corresponding one of the scanning lines is selected, the pixel switching element enters a conductive state between the one terminal and the other terminal, wherein one terminal of the pixel capacitor is connected to the other terminal of the pixel switching element, and the other terminal of the pixel capacitor is connected to a common electrode, wherein the storage capacitor is connected between the one terminal of the pixel capacitor and the capacitor line corresponding to the corresponding one of the scanning lines;
a scanning line driving circuit that selects the scanning lines in a predetermined order;
a capacitor line driving circuit that connects the capacitor line provided in correspondence with one of the scanning lines to a first power supply line when the one of the scanning lines is selected, and that continues to connect the capacitor line to a second power supply line after the selection is completed; and
a data line driving circuit that supplies the pixels corresponding to the selected one of the scanning lines with data signals corresponding to gray scales of the pixels through the respective data lines, wherein
a voltage of the first power supply line, when the one of the scanning lines is selected, is set to be different from a voltage of the second power supply line.
16 . An electronic apparatus comprising the electro-optical device according to claim 7 .