| 摘要 |
It is an object of the present invention to provide a light-emitting device including a light-emitting element with smaller luminance degradation by contriving a driving means. In addition, it is an object of the present invention to provide a driving method for reducing luminance degradation of a light-emitting element. In the present invention, the current density J of a current flowing in a light-emitting element is increased with time in accordance with the following formula (1), where J<SUB>0 </SUB>is an initialization of current density in the light-emitting element, t is an emitting time, and k and beta are individually a positive parameter determined by characteristics of the light-emitting element. <?in-line-formulae description="In-line Formulae" end="lead"?>J=J<SUB>0</SUB>.exp [(k.t)<SUP>beta</SUP>] (1) <?in-line-formulae description="In-line Formulae" end="tail"?>
|
