AC LED Lights have following advantages: Driverless, Driver free, Dimmable, Flicker-free, Longer Life with 4 years warranty even 5 years warranty!
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The concept of an AC LED light is an great technology. Because you can eliminate the AC-to-DC converter and several other electronic components that DC LEDs require, the electronics are simplified between the AC power source and the LED. It will used more widely in the near future.
Someone may ask what does AC LED light mean?
Generally, it’s important to know that AC LED is really a misnomer: LEDs are diodes with current flowing in one direction (as in direct current). However, with a so-called AC-LED scheme, LEDs can be connected directly to the mains power supply (typically 110V/60 Hz or 230V/50 Hz) and create light without the use of a typical driver. For each half-cycle of the AC’s sinusoidal waveform, half of the LEDs emit light and half are dark; this is reversed during the next half-cycle. In this configuration, sometimes referred to as “true AC” or an antiparallel approach, a large number of LEDs in series can operate directly from line voltage.
As all we know, DC LEDs require a driver to condition the AC power infrastructure to provide a DC low-voltage regulated power source for the LED light engine. This driver includes an AC-to-DC converter, typically a large electrolytic capacitor as well as other electronic components that can number up to 20 on the driver board for a 7W MR16 lamp. However, AC (alternative current) LEDs can be connected directly to normal power supplies (usually 110V at 60Hz or 230V at 50Hz) and do not require a LED driver, then we call it driverless LED light.
Attached is a contrastive photo between the traditional LED light and AC LED light.
Please also see the contrast ion between these light.
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The LED light with driver |
Driverless LED COB light |
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1. The product size is limited to the driver. |
1. The product size can be as requirement. |
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2. High failure frequency for LED driver. |
2. Driverless LED light can avoid the failure caused by driver. |
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3. The heat sink is affected by the heat dissipation of LEDs and driver |
3.The heat sink only need to solve the heat dissipation of LEDs |
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4. PF<0.7 for low watt lamp. |
4. PF>0.9 for all driverless lamp. |
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5. Variable quality for DC cob LAMPS. |
5. Stable Samsung AC COB technology, CRI>80RA, no customer complaint. |
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6. Need to change driver when dimmable, cost increased for a product. |
6. Dimmable supported, matching 85% dimmers. |
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7.2-3years warranty |
7. 4-5 years warranty is reachable. |
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8.Some of lamps with driver can’t pass LVD and EMC testing. |
8. Patent design, compatible with SAA, CE standard, withstand high voltage 4200V |
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9. For example Sharp COB with driver, lamp price is generally high. |
9. Driverless Samsung COB, the distinct advantage of price. |
Nowadays, there are essentially three flavors of AC LEDs on the market: low-voltage AC, high-voltage direct AC and high-voltage rectified AC. Low-voltage AC operates from 12V or 24V AC lines that have a magnetic or electronic transformer. Low-voltage AC is typically self-rectified from AC to DC. This is found in outdoor garden lighting, cove lighting and in linear retail lighting. High-voltage AC (15-55V) uses a bridge-rectified topology where the LEDs are driven in a pulsed DC mode every half cycle. With high-voltage rectified AC, some form of current-control circuitry is incorporated to keep the current from running too high during peaks in the voltage curve and doing damage to the LEDs.
AC-LED technology can be described as scalable because multiple AC LEDs can be run in series to match the line voltage level. Lighting applications requiring 12V to 277V AC can be accommodated in this way. In fact, AC LEDs can even be driven at resonance for maximum efficiency, which is not possible with DC.
The key target market for low-voltage and high-voltage AC designs today is really the replacement lamp market, including small-footprint lamps such as G4, G8, GU10 and MR16 lamps as well as B10 replacement lamps for chandeliers. We are also planning to design products for A-lamps, BR lamps and linear module replacements for fluorescent tubes.
Also Down lights are a key target market for AC schemes because often down light fixtures afford little extra space for additional electronics. In addition, any space that is available typically needs to be dedicated to the heat sink.
AC-LED light engines provide a compelling platform especially for retrofit lamps. Whether they become the choice for lamp and luminaries manufacturers will depend on the combined performance and cost of these solutions compared to the better-established DC-LED assemblies and light engines. The race to produce a $10 LED 60W-incandescent-equivalent lamp could be won by either or both technologies.
Down lights are a key target market for AC schemes because often down light fixtures afford little extra space for additional electronics. In addition, any space that is available typically needs to be dedicated to the heat sink. For example, the Seoul Semiconductor Acrich2 16W down light assembly (Fig. 1) features a lumen output of 1250 lm at 3000K CCT and 120° viewing angle.
In a word, AC-LED light engines provide a compelling platform especially for retrofit lamps. It will be a best tendency for future LED lighting and lamp, it will widely used not only in indoor Illumination ( say LED fluorescent bulbs, LED fluorescent tubes, LED fluorescent down light, LED panel light etc), but also in outdoor LED Illumination( say LED flood light, LED high bay light, LED canopy light, LED street light).
our AC bulbs, ac driverless candle bulbs, acT8 driverless tubes, ac Samsung driverless down light, GU10 driverless spotlight , dirverless Samsung flood light, Driverless high bay light, 10W driverless down light are hot selling, For any questions or furthure detail, please feel free to contact us. Welcome to call or email us for the product catalogue and price list.