The Implementation and Design of a Multi-Reflector Cup for LED Lighting

Tse-Ya Chou, Ding-Chin Chou, Ling-Guei Gao


In recent years, the luminous efficacy of light emitting
diodes (LEDs) has met energy conservation requirements.
However, in lighting applications, lighting instruments must be
appropriately applied to illuminate regions of interest. In this
study, the LED AR111 downlight was used as an example to limit
beam areas within a preset illuminating range. The TRIZ method
was applied to generate ideas for product design concepts. We
proposed installing replaceable gratings on LED lighting
instruments, three types of multi-reflector cups that can be
installed at various angles were designed for use in lighting
instruments, and designed multi-reflector cups within gratings
based on compound parabolic concentrator principles for
calculating various beam angles, thereby improving the
distribution of luminous intensity by using secondary optics. The
3D model and optical simulation showed that multi-reflector cups
effectively controlled beam angles, satisfied various types of
applications for illuminated objects, and enabled the effective
utilization of light beams. By manufacturing a lighting
instrument and measuring the distribution of luminous intensity,
we ascertained that the use of multi-reflector cups in lighting
instruments effectively prevented glare. Moreover, replacing the
multi-reflector cups for use at different angles enabled the
illuminated object to receive favorable lighting. The component
was verified to satisfy design requirements.


light-emitting diode lighting; multi-reflector cups; beam angle

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