2022 Fiscal Year Final Research Report
Optimization of dynamic LED lighting space by dimming and toning control
| Project/Area Number |
20K04813
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 23020:Architectural environment and building equipment-related
|
|---|
| Research Institution | Chiba Institute of Technology |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-04-01 – 2023-03-31
|
| Keywords | LED照明 / 調光 / 調色 / 照明制御 / duv / 明るさ知覚 / 色味知覚 |
|---|
| Outline of Final Research Achievements |
The purpose of this study is to identify the effects of chromaticity shift from the Planckian locus duv on the perception of the tinted colour of illumination and the spatial brightness. All 240 conditions with 3 levels of the illuminance, 4 conditions of the correlated colour temperature, 5 levels of duv and 4 patterns of interior reflectance including non-uniform luminance distribution were experimented.
The effect of duv change to the negative side on spatial brightness differed according to the correlated color temperatures, and that was larger in the case of uniform interior reflectance than in the case of non-uniform reflectance.
|
| Free Research Field |
建築光環境
|
| Academic Significance and Societal Importance of the Research Achievements |
現在市販されている調光・調色型のLED照明システムは、2種類のLED光源を組み合わせ、両者の色度の範囲で制御するものが一般的である。組み合わせる元のLED光源は、単体としては極力、黒体放射軌跡上（温度放射による太陽や白熱電球等の色度）に色度が乗るよう設計されているが、調色の段階で黒体放射軌跡から色度がずれる(以下、duv)領域がどうしても生じてしまう。
本研究成果により、内装材の反射率の影響も考慮した上で、調色制御の過程で生じるduvが空間の明るさ知覚、空間内の色味知覚に与える影響を明らかにし、視的快適性を損ねないduv変化の許容範囲を示した。今後の調色制御向けLED照明の設計目標が示された。
|
