Гонконгские студенты разрабатывают самую энергоэффективную в мире светодиодную лампу накаливания
Исследовательская группа Гонконгского политехнического университета (PolyU) claims it has successfully developed the most energy-efficient ВЕЛ filament technology with a luminous efficacy of 129lm/W, который представляет 1.5 в разы эффективнее традиционных светодиодных ламп, превосходит все другие инструменты общего освещения, доступные на рынке.
В настоящее время подана заявка на патент, и дизайн прототипа завершен. Команда планирует провести различные тесты и получить сертификаты для вывода на рынок в 2017.
Исследовательская группа PolyU. В середине: inventor Ricky Chiu Chung-chi, 25.
(Photo Credit: PolyU)
This LED filament technology has excellent energy efficiency. Based on the assumption of a daily operation of eight hours, a PolyU’s LED filament bulb with lumen of 1300lm costs HK$33 (USD 4.2) of electricity tariff per year, and contributes to 22kg of carbon dioxide emission per year.
In comparison, a traditional LED lamp costs HK$47 (USD 6) of electricity tariff and 31kg of carbon dioxide emission yearly with the same lumen and conditions, which means that the new technology can reduce carbon dioxide emission by 30%.
Besides, the new technology enables an expected lifetime of 50,000 часы, with only half of the production cost of traditional LED lamps.
PolyU’s LED filament bulb (the one on the left).
(Photo Credit: PolyU)
The LED filament technology developed by PolyU also has other advantages including:
1. Wide beam angle: 300-степень, parallels to that of incandescent bulb;
2. Comparably high color rendering index (ЦРИ): Enables original color projection of objects as if they are in natural light;
3. Less UV light emission; и
4. More environmental friendly: Absence of harmful chemicals, and consists of less electronic components, и 80% of recyclable materials.
These breakthroughs are made possible by the following technology advancement:
1. Using Aluminium as substrate material
Instead of ceramic and sapphires, Алюминий, with good thermal conductivity, high reflectivity and affordable price, is chosen as the substrate material, to achieve longer lifetime and higher lumen at a lower cost.
Instead of ceramic and sapphires, Алюминий, with good thermal conductivity, high reflectivity and affordable price, is chosen as the substrate material, to achieve longer lifetime and higher lumen at a lower cost.
2. Mounting LED chips of small power on both sides of substrate
This design will reduce energy loss and generate even light diffusion, without affecting luminosity.
This design will reduce energy loss and generate even light diffusion, without affecting luminosity.
3. Applying PolyU’s advanced injection moulding technology
Applying advanced injection moulding technology developed by PolyU Advanced Optics Manufacturing Centre, a seamless and transparent spherical plastic case is produced to make 300-degree beam angle possible.
Applying advanced injection moulding technology developed by PolyU Advanced Optics Manufacturing Centre, a seamless and transparent spherical plastic case is produced to make 300-degree beam angle possible.
4. Enhancing power supply
PolyU LED filament lamp converts AC (alternate current) to low current DC (direct current) directly without dealing with the voltage, and hence reduces components required and simplifies circuits, enhancing reliability and efficiency of the lamp.
PolyU LED filament lamp converts AC (alternate current) to low current DC (direct current) directly without dealing with the voltage, and hence reduces components required and simplifies circuits, enhancing reliability and efficiency of the lamp.