LED bulbs can also be "various stars"
In this article we will discuss the various versatile A-light design themes and the most common lamps currently in use. Due to the high lifespan of LED bulbs, it is expected that the market will soon be saturated. Experts predicted that LED bulbs will be saturated in the market in the middle of last year. There are two reasons. First, demand will fall because long-lived LED lights are dominant and do not need to be replaced frequently. Second, SSL lamps manufactured for specific purposes will make better use of LED sources and will become more and more Popular even in residential applications. In a report released in April 2012 by Strategies Unlimited, the LED-based retrofit lamps sold in 2011 were $2.2 billion. The report predicts a 30% annual increase in 2016, but market saturation will also occur after 2016. .
After discussing the market, let's transition to a discussion of products and design methods. The first thing to talk about is Philips, whose LED bulbs have won a lot of awards in this area, including the US Energy Agency's (DOE) L award. Philips has introduced a number of LED bulbs, but perhaps the most famous is a remote phosphor based design that has a yellow or orange hue when turned off. The remote phosphor design combines a very effective secondary optics for blue LEDs and phosphors to provide a design that is superior to the use of phosphor-converted white LEDs. In addition, remote phosphors provide more consistent color maintenance because the phosphor is not exposed to the heat generated by the LED and therefore does not change color over time.
The three lamps shown in the figure are the L-winning award-winning lamp, the EnduraLED series, and the LED energy-saving lamp A19. The series have the same shape and are based on the air flow passage between the three lighting chambers and the segment for cooling. These LEDs are mounted on a vertical circuit board that is generally perpendicular to the central axis of each segment. These LED profiles are externally expanded and shrunk to provide an omnidirectional beam. However, the L-Like lamp has some differences in design, using different phosphor compositions, and adding some red LED indicators with an energy efficiency of over 90 lumens per watt. In comparison, the slightly lower price of EnduraLED products uses a phosphor to absorb more blue LED lights, still providing a warm 2700K color temperature, but lumen output and efficiency is slightly lower. The right-most lamp was introduced by Philips at the end of 2012. It replaces the 60W incandescent lamp and has the same shape, but the appearance is still white when the power is off. The new design also eliminates the segmentation method. Although Philips has always been a good performer of remote fluorescent lamps, the launch of this new luminaire may be that Philips feels the pressure of the consumer's traditional vision, and instead introduces a new luminaire that is more similar to the traditional appearance.
Insignia is the private label of Best Buy, the world's largest home appliance and electronics retail group, producing many types of consumer electronics, including televisions. In November 2012, it announced the launch of SSL luminaires supplied by Cree. This LED bulb is different from Philips and uses a vertically mounted LED to provide good light distribution. The appearance is white, more traditional, it can be clearly seen that the cooling method is two separate three-sided spherical flank on the surface, and the LED is installed on both sides of the inner surface of the bulb, and there is nothing in the center of the bulb. This design allows the 13W bulb to perform well, with a good omnidirectional beam and a price of $16.99, 800lm and 60W. Best Buy also offers a 9W, 450 lumens, equivalent to 40W of the same series of lights. This product generally reflects that the dimming performance is good. Cree has been designed for thermal, electrical, mechanical, photometric and optical (TEMPO) testing.
Rambus has also introduced a new approach to retrofitting lights. The company is an intellectual property (IP) expert who does not manufacture products but licenses technology to other vendors. Its lighting technology is to provide a small optical component called MicroLens, which transmits the light from the LED source and includes some light embedded in the layer of the deflector to provide natural diffused light.
This technology is currently being used to develop flat lighting. GE Lighting, Cooper Lighting, and Fern-Howard are among the companies authorized to do so. GE Lighting has also introduced LED panel lights. Rambus launched the equivalent of the 60-inch A19 lamp at the Consumer Electronics Show in Las Vegas. The lamp uses three cylindrical MicroLens segments that essentially form a cylindrical lamp. The LED is mounted in a manner that circulates around the lamp into the substrate of the light guide. Rambus believes that using this technology will make manufacturing costs even lower.
Rambus's lamp is the second product to announce the use of light-guiding technology in the second half of 2012. The first is 3M (a long-established multinational company with a long history). The introduction of the light bulb greatly simplifies the design of the driver because the driver is positioned in a relatively spacious ball, and most other SSL fixtures place it in the base or neck of the lamp. The 3M design allows air to flow through the bottom of the bulb and out through the notch in the top of the bulb to cool the LEDs and the drive. The LED is mounted on the neck of the bulb. The design also uses 3M of enhanced specular reflective material on the optical engine and uses a 3M electrical connector. The bulb is sold at Wal-Mart stores for $25 and 800 lumens. 3M offers both 3000K and 5000K versions, the warm white version uses ten LEDs to provide the specified throughput, while the cool white version uses nine LEDs.
At the International Lighting Fair last May, many lighting companies announced the launch of commercial-grade LED lights equivalent to 100W, such as GE Lighting, Switching Lighting, Philips Lighting, Lighting Science Group and OSRAM, and promised the first Entering the market, but in the end Osram won the game earlier than Philips. Osram launched the Osram Sylvania 20W LED A21 in some retail stores in mid-November last year. Philips' EnduraLED fixtures only appeared in the Home Depot store on December 1.
Xiwannian lighting products output 1600 lumens, the efficiency is 80 lumens / watt, the color rendering index is 80 at 2700K color temperature, and can be adjusted to 10%. Osram said that Xiwannian lighting products have a rated life of 25,000 hours. The Xiwannian design, like many other SSL retrofit lamps, uses a segmented architecture, cross-cooling channels and light distribution. It is white in the off state. The A21 lamp can have a slightly longer neck than the A19 lamp, with a slight difference in size, which is irrelevant in many applications because they all use the same Edison socket. But the A21 lights are not suitable for every application. Philips' equivalent 100W LED bulb is also A21, providing 1780 lumens and consuming 22W.
The light bulb from GE, GE has invested in Nuventix and licensed the company's SynJet technology, including the establishment of an air pulse active heat sink. GE uses SynJet technology in its 1600 lumens bulb. This active cooling technology helps minimize the size of the heat sink and can be used in the A19 form factor. However, due to the SynJet, a small amount of energy is required. The lumen design will consume 27W.
Previously, I introduced a new type of liquid-cooled LED bulb in China for the first time on the Internet. Although it has a small power, it emits the same brightness as a 100-watt incandescent bulb. According to Switch, its biggest bright spot is its ability to save 80% more energy than ordinary incandescent bulbs. For commercial applications, the investment return period of this bulb is expected to be 6 months, so it is very cost-effective for merchants to change to this batch of bulbs. This new type of bulb is designed to be driven by an inert cooling liquid so that the LED luminaire can pass higher currents with fewer components for higher illumination. The matte bulb housing allows the light to diverge in all directions. The metal comb baffle on the luminaire is designed to be integrated with an inert liquid to convect the high temperature convection of the bulb body and dissipate it into the environment. Switch calls it a self-cooling environment.
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