| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an output circuit for gradation control which is used for a display device or an output device for achieving excellent gradation display, and to provide a means for inspecting the output circuit for gradation control for current driving. <P>SOLUTION: An output circuit for gradation control comprises a low-side current mirror 55, a low-side gradation control circuit 59, a high-side current mirror 56, a high-side gradation control circuit 60, a current volume-up control circuit 61, and a selective precharge control circuit 62. Since the gradation control circuit for outputting a gradation signal is divided into a high-side and a low-side, characteristics of an output current can be approximated to γ characteristics of a light-emitting element. Furthermore, by using a multi-stage type current mirror, the dispersion of a current for each output part can also be suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT |
