| 摘要 |
PROBLEM TO BE SOLVED: To control loads by control elements the number of which is smaller than that of the loads. SOLUTION: Lamps LP1 to LP9 are connected together in a matrix pattern. Control elements Tr1 to Tr6 are provided on connecting lines L4 to L6 for respective rows and colomns of the matrix formed by connecting the lamps LP 1 to LP 9 together. Then, the connecting lines L1 to L3 of the respective rows are connected to a power source VL through the control elements Tr1 to Tr3. The connecting lines L4 to L6 of the respective columns are connected to ground E through the control elements Tr4 to Tr6. Thus, the loads can be controlled by the control elements Tr1 to Tr6 the number of which is smaller than that of the loads by connecting a plurality of loads to the control elements Tr1 to Tr6. |
