| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for driving a light-emitting device capable of preventing a luminance of a light-emitting element from being fluctuated by applying characteristics of TFTs for controlling current being fed to the light-emitting element, and also capable of generating the constant luminance without adversely being affected by a possible degradation of organic light emitting layers and variable temperature by way of preventing the luminance of light-emitting element from being lowered through a degradation of organic light emitting layers. <P>SOLUTION: Instead of controlling the luminance of the light-emitting element by a voltage applied to TFTs, by controlling current flowing into TFTs via a signal-line driving circuit, it is possible to hold on the current flowing into the light-emitting element at a desired value without adversely being affected by the characteristics of TFTs. Further, a voltage biasing in an inverse direction is fed to the light-emitting element at each predetermined period of time. The above-described two means multiply such practical effects to more securely prevent the luminance from being lowered by the possible degradation of organic light emitting layers, and make it possible to hold on such a current flowing into the light-emitting element at a desired value without being affected by electrical characteristics of TFTs. <P>COPYRIGHT: (C)2007,JPO&INPIT |
