Display device including data signal line drive circuit

摘要

A source AMP output circuit (10) is provided with a switching circuit (17) for carrying out the following operation. That is, in a case where a polarity is reversed, the switching circuit (17) disconnects a data signal line (S(M)) from output terminals of a positive amplifier circuit (15) and a negative polarity amplifier circuit (16) each included in the source AMP output circuit (10), and then connects the data signal line S(M) to a power supply which is in a power supply voltage range (Vdd1 to Vdd3) of the positive polarity amplifier circuit (15) or to a power supply which is in a power supply voltage range (Vdd2 to Vdd4) of the negative polarity amplifier circuit (16).

主权项

1. A display device, comprising:
a data signal line drive circuit; a plurality of data signal lines connected to the data signal line drive circuit; a scanning signal line drive circuit; a plurality of scanning signal lines provided in a display area of the display device and connected to the scanning signal line drive circuit so as to intersect the plurality of data signal lines; and active elements each of which is electrically connected to a corresponding one of the plurality of data signal lines and a corresponding one of the plurality of scanning signal lines, in the vicinity of an intersection of the corresponding one of the plurality of data signal lines and the corresponding one of the plurality of scanning signal lines, said data signal line drive circuit including:
a positive polarity amplifier circuit provided for each of the plurality of data signal lines;a negative polarity amplifier circuit provided for said each of the plurality of data signal lines; anda switching circuit provided for said each of the plurality of data signal lines, in a case where a data signal supplied to a corresponding one of the plurality of data signal lines via one of the positive polarity amplifier circuit and the negative polarity amplifier circuit is changed to be supplied to the corresponding one of the plurality of data signal lines via the other of the positive polarity amplifier circuit and the negative polarity amplifier circuit, the switching circuit (i) electrically disconnecting the corresponding one of the plurality of data signal lines from the positive polarity amplifier circuit and the negative polarity amplifier circuit and (ii) connecting, for a given period, the corresponding one of the plurality of data signal lines to a node which is in a power supply voltage range of the other of the positive polarity amplifier circuit and the negative polarity amplifier circuit, an output of the positive polarity amplifier circuit and an output of the negative polarity amplifier circuit are set so that (i) an absolute value of a highest output value of the positive polarity amplifier circuit and (ii) an absolute value of a lowest output value of the negative polarity amplifier circuit are different from each other, and the output of the positive polarity amplifier circuit and the output of the negative polarity amplifier circuit being set so that, at a timing that a signal supplied to a corresponding one of the plurality of scanning signal lines is changed from high to low, the absolute value of the highest output value of the positive polarity amplifier circuit is larger than the absolute value of the lowest output value of the negative polarity amplifier circuit by a change amount of a data signal supplied via a corresponding one of the plurality of data signal lines and a corresponding one of the active elements.