Electro-optical device and electronic device
An electro-optical device includes a control circuit that controls the timing of output of a precharge voltage to a data line, and changes an elapsed time from start of transition of a voltage of a scanning signal G from a selection voltage to a non-selection voltage until an output of the precharge voltage to the data line according to a polarity of a data voltage, the voltage of the scanning signal for selecting one of multiple scanning lines, the selection voltage causing a pixel transistor to turn on, the non-selection voltage causing a pixel transistor to turn off.
1. An electro-optical device comprising:
a plurality of scanning lines;
a plurality of data lines;
pixels each of which is provided for corresponding one of intersections between the plurality of scanning lines and the plurality of data lines, and includes a pixel transistor that receives a voltage of corresponding one of the plurality of data lines;
a data line driver that outputs a precharge voltage, then outputs a data voltage having a magnitude according to gradation to be displayed, and reverses a polarity of the data voltage with a predetermined period using a predetermined voltage as a reference; and
a controller that controls timing of output of the precharge voltage to the plurality of data lines, and changes an elapsed time, according to the polarity of the data voltage, from start of transition of a voltage of a scanning signal from a selection voltage to a non-selection voltage until an output of the precharge voltage to the plurality of data lines,
wherein the scanning signal selects one of the plurality of scanning lines, the selection voltage causes the pixel transistor to turn on, and the non-selection voltage causes the pixel transistor to turn off.
2. The electro-optical device according to claim 1 ,
wherein the precharge voltage when the data voltage has a positive polarity is higher than the precharge voltage when the data voltage has a negative polarity.
3. The electro-optical device according to claim 1 ,
wherein the controller makes the elapsed time when the data voltage has a negative polarity longer than the elapsed time when the data voltage has a positive polarity.
4. The electro-optical device according to claim 1 ,
wherein the pixels each include a retention capacitor in which one of terminals is connected to the pixel transistor, and the other of the terminals is connected to a capacitive line, and
a period in which the precharge voltage is outputted to the plurality of data lines when the data voltage has a negative polarity is made shorter than a period in which the precharge voltage is outputted to the plurality of data lines when the data voltage has a positive polarity.
5. An electronic device including the electro-optical device according to claim 1 .