Energy-efficient secondary power supply source for light-emitting diode display devices

2011 ◽  
Author(s):  
Vadim D. Khrenov ◽  
Igor I. Savin
Keyword(s):  
Power Supply ◽  
Energy Efficient ◽  
Light Emitting Diode ◽  
Supply Source ◽  
Light Emitting ◽  
Display Devices ◽  
Power Supply Source ◽  
Secondary Power

Development of a Power Supply Source for the Technological Electron-beam Gun Control Electrode

Vestnik MEI ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 86-92
Author(s):  
Nikita M. Vakhmyanin ◽  
◽  
Aleksey V. Shcherbakov ◽  
Daria A. Gaponova ◽  
◽  
...  
Keyword(s):  
Electron Beam ◽  
Power Supply ◽  
Gun Control ◽  
Supply Source ◽  
Control Electrode ◽  
Power Supply Source

scholarly journals LED Rail Signals: Full Hardware Realization of Apparatus with Independent Intensity by Temperature Changes

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1291
Author(s):  
Giuseppe Schirripa Schirripa Spagnolo ◽  
Fabio Leccese
Keyword(s):  
Temperature Sensor ◽  
Energy Efficient ◽  
Light Emitting Diode ◽  
Junction Temperature ◽  
Light Emitting ◽  
Temperature Changes ◽  
Wide Range ◽  
International Regulations ◽  
Long Lifetime ◽  
Set Up

Nowadays, signal lights are made using light-emitting diode arrays (LEDs). These devices are extremely energy efficient and have a very long lifetime. Unfortunately, especially for yellow/amber LEDs, the intensity of the light is closely related to the junction temperature. This makes it difficult to design signal lights to be used in naval, road, railway, and aeronautical sectors, capable of fully respecting national and international regulations. Furthermore, the limitations prescribed by the standards must be respected in a wide range of temperature variations. In other words, in the signaling apparatuses, a system that varies the light intensity emitted according to the operating temperature is useful/necessary. In this paper, we propose a simple and effective solution. In order to adjust the intensity of the light emitted by the LEDs, we use an LED identical to those used to emit light as a temperature sensor. The proposed system was created and tested in the laboratory. As the same device as the ones to be controlled is used as the temperature sensor, the system is very stable and easy to set up.

Opportunities and Challenges in Perovskite LEDs Commercialization

2021 ◽  
Author(s):  
Kai Zhang ◽  
Ningning Zhu ◽  
Mingming Zhang ◽  
Lei Wang ◽  
Jun Xing
Keyword(s):  
Energy Saving ◽  
Energy Efficient ◽  
Light Emitting Diode ◽  
Environment Friendly ◽  
Light Emitting ◽  
Lighting Technology

Recently, the light-emitting diode (LED) has been considered as an energy-saving and environment-friendly lighting technology，which is ten times more energy efficient than conventional incandescent lights. As an emerging photoelectric material,...

Full-Color Fluorescent Display Devices Using a Near-UV Light-Emitting Diode

1996 ◽  
Vol 35 (Part 2, No. 7A) ◽  
pp. L838-L839 ◽  
Author(s):  
Yuichi Sato ◽  
Nobuyuki Takahashi ◽  
Susumu Sato
Keyword(s):  
Uv Light ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Display Devices ◽  
Full Color

Metasurface integrated high energy efficient and high linearly polarized InGaN/GaN light emitting diode

Nanoscale ◽  
2017 ◽  
Vol 9 (26) ◽  
pp. 9104-9111 ◽  
Author(s):  
Miao Wang ◽  
Fuyang Xu ◽  
Yu Lin ◽  
Bing Cao ◽  
Linghua Chen ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Light Emitting Diode ◽  
High Energy ◽  
Light Emitting ◽  
Linearly Polarized

scholarly journals Automatic System of Synchronous Connection of Backup Power Supply Source in Power Systems with Motor Load

2020 ◽  
Vol 20 (4) ◽  
pp. 36-42
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Automatic System ◽  
Supply Source ◽  
Power Sources ◽  
Industrial Enterprises ◽  
Experimental Stand ◽  
Asynchronous Motors ◽  
Power Supply Source ◽  
Fast Acting

We developed an automatic system of synchronous connection of a backup power supply source in power systems with synchronous and asynchronous motors in case of power loss from the main source. Here, we propose performing continuous monitoring of the instantaneous voltage values of the main and backup power sources and determining the angle between them. The time to send the command to turn the backup power switch on is determined on the basis of the results of approximating the dependence of the angle between the voltages of the main and backup power sources on time. The proposed algorithm can be used in microprocessor fast-acting automatic transfer switch devices to ensure acceptable levels of currents of stators and electromagnetic moments of electric motors in self-starting modes and to maintain a complex continuous technolo­gical process at industrial enterprises. The effectiveness of the developed automatic system of synchronous connection of a backup power supply source has been confirmed using mathematical modeling methods and laboratory tests at an experimental stand.

scholarly journals Justification of the Parameters of a DC/DC Converter for an Autonomous Power Supply Source

2020 ◽  
Vol 20 (4) ◽  
pp. 86-95
Keyword(s):  
Power Supply ◽  
Electric Power Industry ◽  
Active Phase ◽  
Input Voltage ◽  
Energy Storage Devices ◽  
Supply Source ◽  
Power Sources ◽  
Storage Devices ◽  
Voltage Change ◽  
Power Supply Source

As the Smart Grid concept has become a part of the electric power industry development, DC/DC conver­ters have turned into a matter of increased interest. This is due to their effective coordination in the DC-bus system operating different types of power sources, including renewable ones and energy storage devices (batteries, supercapacitor modules), and various loads. The article analyzes switch mode power supply DC/DC converters for autonomous power supply systems. The application of the SEPIC (Single Ended Primary Inductance Converter) type converter is substantiated. The techniques of determining the parameters of the converter are presented. The active phase at the duty cycle operation has been demonstrated, and justified in accordance with the theoretical behavior in response to an input voltage change above and below the desired output value. A simulation of the converter's operation in the buck and boost modes in order to stabilize the output voltage at a set level has been performed in the MATLAB / Simulink package. The obtained simulation results show the effectiveness of the suggested solution for an autonomous power supply source.

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