Display device including plural displays

摘要

A display device according to the present invention includes: an organic EL element; an electrostatic holding capacitor; a drive transistor having a gate connected to one electrode of an electrostatic holding capacitor and a source connected to an anode of the organic EL element; another electrostatic holding capacitor having an electrode connected to the other electrode of the one electrostatic holding capacitor; a negative power supply line which determines a potential of a cathode of the organic EL element; and a scanning line drive circuit which controls switching transistors. In a display period, the entire display area of a display unit is caused to start generating photons at once. In a non-display period, the entire display area of the display unit is caused to stop generating photons at once, and the drive transistor is reset.

主权项

1. A display device, comprising:
a display composed of a first display and a second display; and a driver which is configured to drive the first display and the second display, wherein each of the first display and the second display includes:
a plurality of pixels arranged in rows and columns;a scanning line provided for each of the rows;a control line provided for each of the rows;a data line provided for each of the columns; anda first power supply line and a second power supply line for supplying power to the pixels, each of the pixels includes:
a luminescence element having electrodes one of which is connected to the second power supply line;a drive transistor having a source electrode connected to the luminescence element and a drain electrode connected to the first power supply line;a first capacitor having electrodes one of which is connected to a gate electrode of the drive transistor;a first switching transistor which has a gate electrode connected to the scanning line and switches conduction and non-conduction between the gate electrode of the drive transistor and a first reference potential line which provides a predetermined reference potential;a second switching transistor which has a gate electrode connected to the scanning line and switches conduction and non-conduction between the data line and the other of the electrodes of the first capacitor;a third switching transistor which has a gate electrode connected to the control line and switches conduction and non-conduction between the other of the electrodes of the first capacitor and the source electrode of the drive transistor; anda second capacitor having electrodes one of which is connected to the other of the electrodes of the first capacitor and the other of which is connected to a second reference potential line which provides a predetermined reference potential, the driver is configured to:
cause conduction of the first switching transistor through the scanning line in each of all the pixels of the first display and the second display to apply the predetermined reference potential to the gate electrode of the drive transistor in the pixel, and thereby stop photon generation of all of the pixels at a same time so that a non-display period is started; andcause conduction of the third switching transistor through the control line in each of all the pixels of the first display and the second display to apply a signal voltage held by the first capacitor between the gate electrode and the source electrode of the drive transistor in the pixel, and thereby start photon generation of all of the pixels at a same time so that a display period is started, the non-display period includes a resetting period in which the drive transistor in each of all the pixels of the first display and the second display is initialized, and the resetting period is
started by the driver applying a reset voltage to the data line, turning the first switching transistor and the second switching transistor conductive through the scanning line, and turning the third transistor conductive through the control line, so that the reset voltage is applied to the source electrode of the drive transistor and the predetermined reference potential is applied to the gate electrode of the drive transistor, andafter a signal voltage writing period in which, in each of all the pixels of the first display and the second display, the first capacitor is caused to hold a signal voltage terminated by the driver turning the third switching transistor conductive through the control line so that the signal voltage held by the first capacitor is applied between the gate electrode and the source electrode of the drive transistor.