LED Color Mixing Mechanism Design

Abstract

LED is the solid-state light source of the 21st century that ranges from white light to any color in the entire spectrum. LED lights create static or dynamic illumination in indoor lighting applications. Modern indoor lighting fixtures not only provide illumination, but also are the primary elements that create the atmosphere. The use of gradual mixing of lights or different colors not only makes lights fit more people’s physical and psychological needs, but also improve one’s aesthetic perspectives. However, the LED color mixing technique based on RGB colors requires the package of the RGB chips in on single space for the creation of color mixing through the control of voltage and current. An innovative color mixing technique was proposed in this study. A linkage mechanism was introduced. The individual RGB chips were installed in 3 sets of four-bar linkages to enable color mixing by driving the RGB chips with the crank of the mechanism. The color mixing effects provide a continuing change of colors to meet people’s requirements for color mixing fixtures in certain scenarios. The fixtures incorporating this design can be used for stage lighting and biomedical engineering testing.