The electric scheme of control device of organic light-emitting diodes which are considered to apply for room lighting has been introduced. There are three channels with OLED adjustable brightness. This allows to control either tricolor panel sorlighting of three-room areas, orto perform a three-stage control of the light. Thus, it provides a gradual change in lighting brightness by alternating lighting in each of three channels. Its feature is to maintain constant lighting in the room depending on the time of day (outdoor lighting). The developed scheme of the device can be used in such systems as "Smart Home", one of the subsystems of which is the lighting subsystem. Its purpose is to control the lighting in the room for comfort and energy saving. The device has been designed in order to function on its own and it can be further developed for integration into the "Smart Home" system using a "single-wire" protocol for control. Since OLED can be applied into flexible substrates, light-emitting surfaces can be designed as a wall paper or plates that will be attached to the wall or ceiling. It can also be designed in the form of tension structures. The control scheme can be developed and improved, its functionality has to be expanded. It is also important to provide control on a local wireless network of Wi-Fi, etc. Unlike a silicon LED, the dependence of the luminous flux on the current through the organic LED has a slightly different character – it is nonlinear and with increasing LED current, the rate of brightness increases. This characteristic is taken into account in the laws of regulating microcontroller program which controls work of the device. In order to reduce the effect of light pulsations on vision, which are observed at short PWM pulse duration, the brightness is adjusted partly by PWM (from 50%to 100% ofthepulseduration) and partly by adjusting the supply voltage of the LEDs.
The research object of this work is the parameters of organic light-emitting diodes, namely power and luminous flux. Determination of these parameters can be carried out using a photodiode and requires measuring the dark current of the sensor (photodiode), measuring the current of the photodiode when illuminated by the LED under investigation. And also take into account the relationship between the light flux received by the sensor and its output current, and take into account the spectral characteristics of the sensor. Calculate the investigated parameters of the LED based on the measurements. Carrying out these measurements requires laboratory instruments and workplace organization, and further calculations are routine work. It is possible to increase the measurement accuracy by improving the existing methods for measuring the required parameters, and it is possible to automate the process of measurements and calculations using a modern microprocessor radioelement base. Microcontrollers are widespread such radioelements. They have the necessary peripherals for independent operation and have sufficient computing power to implement the required measuring device. Its application makes it possible to automate the measurement process, carry out the necessary calculations, save correction constants, accumulate and process the obtained data, analyze these received data, exchange data with a computer, etc. So, the work is aimed at developing a methodology that will allow the simultaneous measurement of power and luminous flux of planar light sources. And also on the feasibility of this technique in the device and software with the ability to measure the power of the light source in an arbitrary band of the spectral visible range. Thus, it is possible to determine what power in watts a light source emits with the dynamics of supply currents in the optical bands, knowing the spectrum of this source without using glass filters. So, the result of applying the technique is to determine the power of light radiation (in watts) or the luminous flux (in lumens) of the emitter (light sources).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.