組合式紅、藍光發光二極體燈具之給光環境模擬

Simulation of Light Environment under Blue and Red Leds

饒瑞佶(Ruey-Chi Jao) ； 方煒(Wei Fang)

《農業機械學刊》 9卷3期 (2000/09) Pp. 51-63

https://doi.org/10.30062/JAM.200009.0004

摘要

自從超高亮度發光二極體(Light Emitting Diode, LED)與藍光LED問世之後，LED的應用領域日益寬廣，其作為植物栽培人工光源的研究在近十年也逐漸普遍。早期偏向作為太空農業的應用，近期已朝向作為組織培養苗人工光源的方向發展。本研究使用恆嘉光電公司(Everlight Corp.)超高亮度紅光LED(5ERBCCW-DG,8cd, ф5mm)與藍光LED(5GBCCCS-GG, led，ф5mm)為試驗材料，量測在不同電壓與電流下其正下方之光量值，透過迴歸分析建立實驗式，另由廠商型錄中提供之數據求得理論式，可計算空問中任何位置的光量。以此二式為基礎撰寫電腦軟體，模擬單顆或多顆紅光與／或藍光LEDs在不同排列方式下，光源正下方平面上的照度、光量子數分布、紅藍光光量子數比及整個平面的光量均勻度等。由於實驗式的建立係由整批中隨機取樣30顆進行量測，產品本身的品質是否穩定影響實驗式的準確度頗大。使用此實驗式模擬其他的單顆紅光及藍光LED時，後者之誤差為前者之4倍，顯示藍光LED的品質穩定度頗需要加強。使用自製的組合式紅、藍光燈具（包括4藍，9紅光LEDs，圖7）進行驗證，誤差則為172%。本研究所建立的組合式LED給光環境模擬軟體可提供吾人一個工具來協助分析以LED為人工光源時的給光環境。LED的製作品質愈穩定，同一批號之問的差異愈小，用來建立計算式的LED愈具代表性，模式的準確度可愈高。隨著光電產品製造技術的進步，品質高且亮度均一的LED是可以預期的，屆時，本模式更能發揮實用價值。

關鍵字

發光二極體 ； 給光環境 ； 組織培養 ； 電腦模擬

並列摘要

Since the successful development of super-bright red and blue light-emitting diode (LED), the domains of its application have been increased rapidly. LEDs were used for space based plant production started 10 years ago. Recently, it was considered as an alternative to the fluorescent lamps for tissue culture production. The light intensity of super-bright red LED (5ERBCCW-DG, Everlight Corp., 8 cd, (ф5 mm) and blue LED (5GBCCCS-GG, Everlight Corp., 1 cd, (ф5 mm) under various voltage and current were measured and a regression equation was developed for each type of LED. Another sets of equations were derived based on the technical data provided by the manufacturer. The simulation software developed provides the capability of calculating the spatial distribution on bench under the light source in both photometric and quantum units and the uniformity of the distribution of light intensity and ratio of red and blue quantum on bench. The model was validated with the same LEDs and also validated with LEDs under same batch number and 17.2% error was found for a combination of 4 blue and 9 red LEDs arranged 1 cm apart in a 3 by 3 cm plate(Fig 7). The errors were mainly from the manufacturing process. We also found that the red LEDs of the same batch have better uniformity compared with blue LEDs. The simulation model developed in this study provide users a friendly interface, capable of providing spatial and spectral information in term of photometric and quantum units and also uniformity of light intensity and quantum ratio on bench under a combination of any number of blue and red LEDs. The model can provide useful information only if the variations among LEDs installed were small. With the advancement of manufacturing technology in the photonics industry, LEDs with high quality and uniformity can be expected in the near future.

並列關鍵字

Light-Emitting Diode ； Light Environment ； Plant Tissue Culture ； Simulation