Patent ID: 6885356
Filing Date: 2005-04-26
Classification: G09G,H04W,Y02D

Abstract:
1. An active matrix-type display device comprising: a plurality of scanning lines; a plurality of data lines each crossing said plurality of said scanning lines; a plurality of light emitting elements; a plurality of switches; a plurality of transistors; a bias voltage line; each of said transistors being connected between an associated one of said light emitting elements and said bias voltage line, each of said switches being connected between an associated one of said data lines and a gate of an associated one of said transistors and being rendered one of ON and OFF states by an associated one of said scanning lines; a driving unit driving said scanning and data lines to display an image; and a variable bias voltage generating circuit electrically connected to said bias voltage line; said variable bias voltage generating circuit responding to a first control signal which represents that a content of said image is not changed for a predetermined period of time and changing a bias voltage on said bias voltage line such that luminance of said light emitting elements is lower than the luminance of said light emitting elements during said predetermined period of time.