Patent ID: 7576498
Filing Date: 2009-08-18
Classification: G09G

Abstract:
1. An organic El drive circuit which outputs drive current in correspondence with respective terminal pins for one line component in horizontal direction at the column side of an organic El panel and current drives the organic El panel comprising: a maximum voltage value detection circuit which detects the maximum voltage value among voltages with respect to respective drive current corresponding to the respective terminal pins of one line component in horizontal direction, a hold circuit which receives the maximum voltage value and holds a voltage corresponding to the maximum voltage value at least at the time of light emission of organic EL elements, a power source circuit which receives an input electric power and generates an electric power having a voltage higher by a predetermined value than the voltage held as a power source voltage and output stage current sources which are respectively provided for the respective terminal pins, are operated when received the power source voltage and generate the drive current, wherein the predetermined value is set at a voltage equal to or more than the voltage with which the output stage current source can current drive the organic EL elements, and wherein the predetermined value corresponds to a voltage which is necessary when the output stage current sources generate the drive current in a range from a predetermined minimum brightness to maximum brightness of the organic EL elements.