| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption necessary for charging and discharging a parasitic capacitance, or to elimite the excessive power consumption by completely removing the electric charge from the light emitting elements for next emitting or leaving a part of them, and letting them remain on the other light emitting elements. SOLUTION: Before turning on organic EL light emitting elements L1, 2 and L2, 2, switches Sa1 and Sa2 connect anode lines a1 and a2 to the ground potential GND, and switches Sa3-Sam are open. Then, switches Sc1-Scn connect cathode lines c1-cn to the ground potential GND. By these connections, the electric charge accumulated by positive bias impression when the organic EL light emitting element L1, 1 is turned on and the electric charge accumulated on the organic EL light emitting elements L2,2-L2,n by the reverse bias impression are discharged. Also, in the organic EL light emitting elements L3,1-L3,n, a part of the charge accumulated on L3,2-L3,n is transferred to L3,1. Similarly, electric charge is transferred also concerning the organic EL light emitting elements on anodes a4-am. |
