Facile Generation of Thenil and Furil Based Blue Emitters for Fabrication of Non-Doped and Solution-Processed Light-Emitting Electrochemical Cells

Environmentally sustainable, energy-efficient and economical devices have drawn great attention and are considered to be the future of artificial lighting device market. Taking this into account, we have designed and...

DESIGNING A LIGHTING DEVICE IN THE KOMPAS-3D

The article describes the development of an industrial LED lamp DPP-139. The main stages of design are presented. To create a 3D model, the KOMPAS-3d program was used.

A Luminous Efficiency-Enhanced Laser Lighting Device with a Micro-Angle Tunable Filter to Recycle Unconverted Blue Laser Rays

In this work, a phosphor converter with small thickness and low concentration, based on a micro-angle tunable tilted filter (ATFPC), was proposed for hybrid-type laser lighting devices to solve the problem of silicone phosphor converters’ carbonizing under high-energy density. Taking advantage of the filter and the scattering characteristics of microphosphors, two luminous areas are generated on the converter. Compared with conventional phosphor converters (CPCs), the lighting effects of ATFPCs are adjustable using tilt angles. When the tilt angle of the micro filter is 20°, the luminous flux of the ATPFCs is increased by 11.5% at the same concentration; the maximum temperature (MT) of ATFPCs is reduced by 22.8% under the same luminous flux and the same correlated color temperature (CCT) 6500 K. This new type of lighting device provides an alternative way to improve the luminous flux and heat dissipation of laser lighting.

Design of Photovoltaic Panel-Light-Emitting Diode Spotlight and Its Performance Analysis in Tunnel Buildings

According to the adaptive characteristics of the entrance and exit sections of tunnel buildings with the intensity of external sunlight, the cost of traditional photovoltaic panel (PV)-light-emitting diode (LED) lighting system increases due to battery. Combined with the structure of sunshine conveyor, a new PV-LED spotlight is proposed. The lighting device uses PV module as the power supply to directly drive the LED light source, which can make the brightness of the tunnel synchronized with the sunlight intensity, avoid the problem that it cannot work stably due to its weather changes, and further save the cost without battery. The main control chip adopts STC12C5A60S2 and supports multiple 10-bits precision A/D conversion channels. It can process the output signal of the light intensity detection circuit and set a threshold circuit to judge the intensity of sunlight, further control the working state of LED lighting device. The LED display module adopts 12864 liquid crystal display (LCD) with built-in T6963C driver to display five kinds of data, including the output voltage of light intensity detection circuit and the corresponding voltage value of four threshold circuits. The circuit resistance can be adjusted to change the light output voltage threshold required by the tunnel. In the test, the PV-LED lighting device is erected in the tunnel building. Compared with the traditional PV-LED lighting device and the new PV-LED spotlight designed, the new PV-LED lighting device in the morning and evening can further improve the efficiency of solar power generation. Meanwhile, the PV plate plane of the designed lighting device is perpendicular to the plane where the sunlight shines. The spectral irradiance and full band spectral irradiance of the lighting device in six bands was calculated and found that the percentage of spectral irradiance in different bands is close to the percentage requirement under AM1.5.

Complementary Concentrating Solar LED Lighting Device and Its Application in Architectural Design

The shortcomings of solar LED lighting concentrators and divide and conquer power module are analyzed, and a new set of solar LED lighting devices is proposed. From the aspect of concentrating solar energy, the device redesigns the structure of the existing symmetrical inner wall lens composite parabolic concentrator (SLCPC) by comprehensively using the principles of solar photovoltaic power generation and light transmission lighting. With the assistance of an optimized coating strategy, a part of the incident solar energy is introduced into the indoor lighting (TSLCPC) to realize energy complementary without affecting the optical performance of SLCPC. Meanwhile, it adopts a bidirectional synchronous rectifier DC-DC converter with Buck-Boost as the main topology. The lighting device takes single-chip microcomputer PIC16F887 as the main control chip, which has high-performance and low power consumption. A bidirectional synchronous rectifier DC-DC converter is adopted to realize MPPT control and LED drive. The hardware design of the device is also given. In the test, although the waveform of the bidirectional DC-DC converter has some burr in forward and reverse operation, the measurement accuracy remains stable, which verifies the feasibility of the device circuit. TSLCPC has the same optical efficiency as SLCPC, and it uses escape light to improve the utilization of solar energy. The effective light-receiving angle of TSLCPC and SLCPC ranges from −30° to 30°. When the system is introduced into the buildings in Hefei, it is found that the installation angle exerts a significant impact on lighting performance of TSLCPC, and then affects the lighting performance to a certain extent. However, it is generally acceptable.

Starokršćanske staklene svjetiljke

Glass lamps are important element of Early Christian material culture. They are almost inevitable part of liturgical furnishings of church interiors from the second half of the fourth century onwards. Their significance is attested by numerous historical sources and visual depictions. They are common find in the churches and necropolae where they can have simbolic meaning also. Their typology can be divided into five basic forms: cup/bowls (Uboldi I), conical lamps (Uboldi II), lamps with base knob (Uboldi III), funnel-shaped lamps (Uboldi IV), chalice-shaped lamps (Uboldi V), mostly dated from the end of the 4th century to the 8th century. Glass lamps consisted of glass vessels filled with water and oil layer with a floating wick which could be made of flax or cotton fibres or obtained from some other plant fibres. They represented a technological advancement in comparison to clay and metal oil lamps since oil and water, together with transparent vessel, enabled much stronger light with the same amount of used oil. In addition to glass parts, elements of lighting device also comprised wick holders and metal elements (monocandela and polycandela) that enabled suspension of lamps.

DESIGN OF A LED LIGHTING DEVICE FOR GENERAL LIGHTING OF INDUSTRIAL AND OTHER PURPOSE ROOMS WITH HIGH SPAN

The article is devoted to the design of a LED lighting device Laight Emitting Diode (LD) to replace the base LD with a gasdischarge light source for general lighting of industrial and other premises with high spans. The paper presents a description of the basic LD RSP 51 – 2000 and substantiates the need for its replacement. To create an LD with a high luminous efficiency, LEDs with a luminous efficacy of 142.2 lm/W at a rated current of 400 mA are used. When analyzing the results of ray tracing in the TracePro optical program for a flat and rounded protective screen of the LED LD, it was found that the most preferable is the use of a rounded protective screen made of Plexiglass. The results of modeling the LED LD showed that the designed LD is an energy efficient analogue of RSP 51 – 2000.