| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control method of controlling illuminance at an illumination request position of an illumination apparatus with constitution which is as inexpensive as possible. <P>SOLUTION: There is provided the control method of controlling luminous intensity of a plurality of illumination apparatuses arranged in a room having a window. The method includes: acquiring influence apparatus illuminance at the illumination request position by each illumination apparatus alone; finding an external light illuminance estimation expression with which external light illuminance by external light can be estimated based upon a plane coordinate position as a variable; detecting total illuminance including the external light as well in a state in which the respective illumination apparatuses are turned on by an illuminance sensor arranged at a predetermined place; finding estimated apparatus illuminance at the illumination request position based upon a current turn-on state of the illumination apparatuses; finding actual external light illuminance only by the external light by subtracting the estimated apparatus illuminance from the total illuminance; finding estimated external light illuminance at the illumination request position from the actual external light illuminance and external light illuminance estimation expression; and controlling luminous intensity of each illumination apparatus so that the total value of the estimated external light illuminance and the estimated apparatus illuminance at the illumination request position reaches target illuminance. <P>COPYRIGHT: (C)2012,JPO&INPIT |
