Patent ID: 6534925
Filing Date: 2003-03-18
Classification: G09G

Abstract:
An organic electroluminescence driving circuit for driving a passive matrix organic electroluminescence display panel in which a plurality of organic electroluminescence elements is arranged in row and column directions in a matrix form and in which one terminal of each of said organic electroluminescence elements is connected to each of a plurality of scanning lines in every row and another terminal of each of said organic electroluminescence elements is connected to each of a plurality of data lines in every column, said organic electroluminescence driving circuit comprising:a plurality of driving sources each being placed on every said data line in each said column and each feeding a driving current from a first power source to a data line selected at every scanning timing, a plurality of charging switches each being placed on every said data line in each said column and each connecting all said data lines to a voltage holding circuit at an initial stage of said scanning timing and releasing the connection at an end stage of said scanning timing, a voltage holding circuit to hold each of connected said data lines at a fixed voltage; and a plurality of horizontal driving change-over switches each being placed on every scanning line in each said row and each connecting selected said scanning lines at an initial stage of said scanning timing to a ground and, at said end stage of said scanning timing, each connecting said selected scanning line to a second power source and, in a subsequent scanning cycle and thereafter, each performing switching so as to cause said selected scanning line to be in a high impedance state until said scanning line is again selected next.