Dimming control device and dimming program

Abstract

To suppress the variation in an actual fading period when automatically adjusting illumination luminance and the like without requiring expensive hardware.SOLUTION: A dimming control program includes: deciding a change frequency C0 in S14 when sequentially and gradually switching luminance from a current luminance number Np to a target luminance number N1 according to a change instruction; deciding a switching cycle per one stage as one step time Ts on the basis of a predetermined fading time Tf and the change frequency C0 in S15; switching the one step time Ts to the corrected step time Tse during processing of S22 in control of at least one stage included in the change frequency when a time difference Te of the one step time is detected in S18; and reducing a variation in the length of the fading time Tf by using the corrected step time Tse when the error occurrence of the time difference Te is expected due to constraints of a multiple of a control cycle T0.SELECTED DRAWING: Figure 6

Claims

1. The dimming control unit, in accordance with a predetermined change instruction, sequentially switches the brightness indicator value related to at least the luminance of one or more light-emitting elements from the current brightness to the changed target brightness in steps, The dimming control unit, A procedure for determining the number of changes based on the target brightness after the change and the current brightness, A procedure for determining the switching cycle per stage as one step time based on a predetermined fade time and the number of changes, If an estimated control error for the one-step time is detected, a procedure is performed to correct the one-step time to a corrected length in at least one control step included in the number of changes, Having, Dimming control device.

2. The dimming control unit, Based on a predetermined fade time, the number of changes, and a predetermined task time, the switching cycle per stage is determined as the one-step time, and the estimated control error of the one-step time is detected by comparing the product of the one-step time and the number of changes with the fade time. The dimming control device according to claim 1.

3. The dimming control unit, Based on a predetermined fade time, the number of changes, and a predetermined task time, the switching cycle per stage is determined as the one-step time. The process of correcting the one-step time to the corrected length is repeated within the number of changes, a number of times determined based on the number of changes and the task time. The dimming control device according to claim 1.

4. The dimming control unit has multiple output terminals for individually controlling each of the multiple independent light-emitting elements, and changes the luminescence of each of the multiple light-emitting elements at the same time. The dimming control device according to claim 1.

5. A dimming program executable by a computer in a dimming control unit, which sequentially switches a brightness indicator value related to at least the luminance of one or more light-emitting elements from the current brightness to a target brightness after the change, in accordance with a predetermined change instruction, A procedure for determining the number of changes based on the target brightness after the change and the current brightness, A procedure for determining the switching cycle per stage as one step time based on a predetermined fade time and the number of changes, If an estimated control error for the one-step time is detected, a procedure is performed to correct the one-step time to a corrected length in at least one control step included in the number of changes, Having, Dimming program.

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