Title: Organic EL element drive circuit and organic EL display device using the same drive circuit
Application Number: 200410062831 Application Date: 2004.06.25
Publication Number: 1577450 Publication Date: 2005.02.09
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G09G3/30,H05B33/26
Applicant(s) Name: Rohm Co., Ltd. Address:
Inventor(s) Name: Maede Jun
Attorney & Agent: zhu jingui
Abstract:
     An organic EL element drive circuit comprises a current mirror circuit including an input side transistor supplied with a predetermined current and a plurality of output side transistors provided correspondingly to terminal pins of an organic EL display panel, for obtaining drive currents to be supplied to the respective terminal pins, a switch circuit connected in parallel to or in series with the input side transistor of the current mirror circuit, a memory for storing display data indicative of luminous intensities of the organic EL elements driven through the terminal pins and a control circuit for ON/OFF controlling the switch circuit to cut predetermined current supplied to the input side transistor when the display data stored in the memory for one horizontal display line or for a part of the one horizontal display line indicates that the organic EL elements are not to be driven.
Time: 4
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