LED GROUP CONTROL SYSTEM FOR RESEARCH OF COLOR MIXING METHODS
Keywords:LED, LED control system, Auto-tuning
Background. Development of new LED lighting systems, based on different types of LEDs (for example: WW, RGB, RGBW, RGBA, to name a few) and implement a dynamic change of color parameters of light and its intensity in given scenarios, requires the development of new methods of color mixing. These methods need to be tested and improved in the process of their development, as well as take into account the real aspects of application and different power supply modes of LEDs. It is convenient to check the developed methods with the help of specialized programs that allow obtaining and analyzing the total spectral characteristic of mixed light on the basis of known spectral characteristics of individual LEDs in arbitrarily given proportions. However, it is clear that such theoretical color mixing does not take into account the dependences of the photometric parameters of LEDs on the control mode and temperature conditions of their operation, which is observed in practice. These factors indicate the need to develop a group control system for LEDs to implement a practical test of color mixing methods using associated spectrophotometric equipment.
Objective. The purpose of the paper is development of a group control system for LEDs for the study of color mixing methods.
Methods. Set and control of accuracy of reproduction of current values through the LEDs in a constant and pulse power supply modes.
Results. An eight-channel system of group control of LEDs is demonstrated, which operation modes can be adjusted both manually and with the help of a computer, which allows fully automating the study of mixed light parameters using additional spectroradiometric or photometric equipment. Studies of the system parameters have shown that the use of an additional auto-tuning function has significantly increased the accuracy of setting the current values of the supply currents of LEDs and stability of the output currents from the supply voltage of the system
Conclusions. The developed system of group control of LEDs can be used for experimental research of theoretical calculations of color mixing models. The results of the research will allow us to analyze the developed methods of color mixing, to improve them and to carry out practical adaptation to artificial LED lighting systems, which are designed to illuminate workplaces and recreation, taking into account the circadian impact on psychophysical and emotional condition, agro-industrial lighting for animals and phytolighting plants, medical treatment or disinfectant lighting, lighting of cultural and artistic objects, outdoor street and industrial lighting.Conclusions. The developed system of group control of LEDs can be used for experimental researches of theoretical calculations of models of mixing of colors. The results of the research will allow to analyze the developed methods of color mixing, to improve them and to carry out practical adaptation to artificial LED lighting systems, which are designed to illuminate workplaces and recreation, taking into account the circadian impact on psychophysical and emotional condition, agro-industrial lighting for animals and phytolighting plants, medical medical or disinfectant lighting, lighting of cultural and artistic objects, outdoor street and industrial lighting.
S. Tanga et al., “Development of a prototype smart home intelligent lighting control architecture using sensors onboard a mobile computing system”, Energy and Buildings, vol. 138, no. 1, pp. 368–376, 2017. doi: 10.1016/j.enbuild.2016.12.069
V. Mayskaya, “Communication through lighting devices. Internet on a light bulb”, Electronics: Science, Technology, Business, vol. 7, pp. 32–36, 2010.
V.I. Kornaga et al., “Color mixing models for smart lighting systems based on RGBW and WW LEDs”, Semiconductor Physics, Quantum Electronics & Optoelectronics, vol. 18, no. 3, pp. 302–308, 2015. doi: 10.15407/spqeo18.03.302
D. Kalustova et al., “Color temperature tunable RGBW clusters with 3 control channels”, Photonics Letters of Poland, vol. 12, no. 1, pp. 10–12, 2020. doi: 10.4302/plp.v12i1.968
D. Kalustova et al., “Red, green, blue, and white clusters for daylight reproduction”, Optical Engineering, vol. 59, no. 5, p. 055102-1-14, 2020. doi: 10.1117/1.OE.59.5.055102
N.V. Kobrina, “Adaptive system of the vehicle rear signal lights”, Vehicle and Electronics. Innovative Technologies, no. 12, pp. 82–89, 2017.
S.P. Sernov et al., “Adaptive optical systems of the vehicle lighting equipment”, Devices and Methods of Measurements, no. 2, pp. 13–19, 2011.
A.V. Aladov et al., “Polychromatic spectrally tunable LED lighting fixtures: development and application experience”, Light & Engineering, no. 5-6, pp. 34–39, 2013.
A.V. Aladov et al., “Color Dynamic operation lamp with full color LED”, Light & Engineering, vol. 2, pp. 13-18, 2012.
OSRAM SYLVANIA ColorCalculator [Online]. Available: https://www.osram.us/cb/tools-and-resources/applications/led-colorcalculator/index.jsp
V.I. Kornaga et al., “Investigation of visual perception of brightness of constant and impulse light signal of LEDs by human eye”, Optoelectronic Information-Power Technologies, vol. 1, pp. 81–87, 2014.
X. Luo et al., “Experimental and numerical investigation of a microjet-based cooling system for high power”, LEDs Heat Transfer Engineering, vol. 29, no. 9, pp. 774–781, 2008. doi: 10.1080/01457630802053777
V.I. Kornaga et al., “Algorithms and methods for automatic control of the optical characteristics of lighting systems”, Reports BSUIR, vol. 4, pp. 46–52, 2015.
R. Srividya and C. Pearl, “White light source towards spectrum tunable lighting – A review”, in Proc. Int. Conf. Advances in Energy Conversion Technologies, 2014, pp. 203–208. doi: 10.1109/ICAECT.2014.6757088
G.D. Massa et al., “Plant productivity in response to LED lighting”, HortScience, vol. 43, pp. 1951–1956, 2008. doi: 10.21273/HORTSCI.43.7.1951
S. Devesh, “LEDs for energy efficient greenhouse lighting”, Renewable and Sustainable Energy Reviews, vol. 49, pp. 139–147, 2015. doi: 10.1016/j.rser.2015.04.117
Copyright (c) 2020 The Author(s)
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work