Patent ID: 8368620
Filing Date: 2013-02-05
Classification: G09G

Abstract:
1. An organic electroluminescence (EL) display panel, comprising: an organic EL element; a capacitor that includes a first electrode and a second electrode, and holds a voltage corresponding to a data voltage; a first drive transistor that is of a P-type and includes a gate electrode connected to the first electrode of the capacitor and a drain electrode connected to an anode electrode of the organic EL element, the first drive transistor causing the organic EL element to produce a luminescence by supplying the organic EL element with a first drain current corresponding to the voltage held by the capacitor; a second drive transistor that is of an N-type and includes a gate electrode connected to the first electrode of the capacitor and a source electrode connected to the anode of the organic EL element, the second drive transistor causing the organic EL element to produce the luminescence by supplying the organic EL element with a second drain current corresponding to the voltage held by the capacitor; a data line for supplying the data voltage; a switching transistor that causes the capacitor to hold the voltage, by switching between conduction and non-conduction between the data line and the capacitor; a first power source line for applying a first power source voltage to a source electrode of the first drive transistor; and a second power source line for applying, to a drain electrode of the second drive transistor, a second power source voltage which is higher than the first power source voltage, wherein the first drive transistor has current-voltage characteristics such that a first gate voltage value corresponding to a predetermined current value in current-voltage characteristics of the organic EL element is a minimum voltage of the data voltage, and that the lesser the first drain current is than the predetermined current value, the higher a gate voltage for causing the first drain current to flow becomes, and the second drive transistor has current-voltage characteristics such that a second gate voltage value corresponding to the predetermined current value is a voltage value greater than a third gate voltage value corresponding to a minimum value of a current that is caused to flow to the organic EL element, and that the greater the second drain current is than the predetermined current value, the higher a gate voltage for causing the second drain current to flow becomes.