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Lighting LED optical parametric test and applied research

Author: WangYingJie
Tutor: ZhangSuJuan
School: Northwestern University
Course: Optics
Keywords: Light-emitting diodes Luminous intensity spatial distribution curve Data acquisition Vision optical efficiency Optical design
CLC: TN312.8
Type: Master's thesis
Year: 2010
Downloads: 568
Quote: 3
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Abstract


The light-emitting diode (Light Emitted Diode LED) light source has been widely used in the field of information , the field of lighting , display areas, following the new light source incandescent, fluorescent , gas discharge lamp . With the rapid development of the optoelectronics industry , LED performance parameters measurement also put forward higher requirements. Many research institutions have developed with a higher level of LED testing equipment , but its high cost . This project based on the CIE standard , developed a set of LED luminous intensity measurement system automatically . The system reduces the cost on the basis of satisfying the stability and accuracy . In the design of the test system , the paper first introduces the LED photometric basic theory and measurement of domestic and international standards proposed design of the overall scheme of the measurement system , divided into two parts, hardware design and software design . The test system hardware including : stepper motor driven by the PC machine control MCU system , the optical signal is converted to an electrical signal photodetector and the completion of the data acquisition and processing 08100A data acquisition card . The software portion of the test system , including a program controlled stepper motor driver , A / D conversion process , data communications part . The entire software is based in part on LabVIEW do systems , to achieve stepper motor control and data acquisition and processing . Then , on a typical LED samples were measured , and the use of the Matlab mathematical tools to analyze the measured data , draw the the 1W class \respectively, f ( x ) = a * x - 2 and on this basis , the use of TracePro software to design a LED street lamp . White LED luminous efficiency will reach the number of hot issues limit lumens white light blue excitation yellow phosphor and the three primary colors (red, green, blue RGB) value ( vision optical efficiency ) theoretical calculations , respectively, derived its theoretical value of 200.0 and 464.3 lm / w . Finally, a summary of the work of this article based on direction on this topic may be improved outlook . It can be predicted , the research of this subject will provide reference LED optical design and related aspects .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Semiconductor technology > Semiconductor diode > Diodes: structure and performance > Light-emitting diodes
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