Patent ID: 6756951
Filing Date: 2004-06-29
Classification: G09G

Abstract:
A display apparatus comprising:a display panel made by forming a light emitting device serving as one pixel in each cross portion of a plurality of first electrode lines and a plurality of second electrode lines arranged so as to cross each of said first electrode lines; and a driving unit for light emission driving said display panel, wherein said driving unit is made of a plurality of driving circuits having a plurality of driving transistors each for generating a light-emission drive current to allow said light emitting device to emit light and supplying said light-emission drive current to said first electrode line, at least one of said plurality of driving circuits is further provided with a reference current supplying transistor which generates a light-emission drive current to allow said light emitting device to emit light and supplies said light-emission drive current as a reference current, a first control transistor having a base terminal connected to base terminals respectively of said driving transistor and said reference current supplying transistor, and means for driving said first control transistor so that a current corresponding to a predetermined reference voltage flows through said first control transistor, and another one of said plurality of driving circuits is further provided with a second control transistor having a base terminal connected to the base terminal of said driving transistor, and means for receiving said reference current and for driving said second control transistor so that a current corresponding to said reference current flows through said second control transistor.