Lighting level LED factory development overview and main products list
With the improvement of LED efficiency and technological advancement, the field of LED applications has gradually entered the field of illumination from the use of backlights and indicator lights. However, in order to solve the problem of light and heat, various LED manufacturers have their own solutions from chip to package, and even to lamps, and the product specifications are numerous. Therefore, the readers will organize the current development of lighting-grade LEDs at this stage, as well as the main products of various manufacturers.
Discussion on the specification of lighting grade LED
Lighting-grade LEDs can be explored and categorized on many levels. Sorted from the chip side, you can classify low power (High Brightness LED, 20~150mA), high power (High Power LED, <150mA), AC LED and other types from current. The distinction between the package structure can be divided into a single chip package for a single chip package on a single package, or a multi-chip package with a multi-chip package on a single package. Different package structures and chips have their suitable lighting market.
Figure-1 Lighting Level LED Chip and Package Specifications
LED lamps for various specifications of LEDs
At present, most of the light sources used in the bulb type LED lamps are high-power LEDs and AC LEDs in single crystal and polycrystalline packages. High-power LEDs in single-crystal packages are commonly used in lighting products with concentrated light sources such as MR16 and LED projection lamps. The LED bulbs that replace the energy-saving bulbs above 10W use high-power LEDs with multiple packages as the light source. AC LEDs are limited by the technical bottleneck of AC LED chips. At present, LED bulbs that replace incandescent lamps are generally more than 10W. As for the lighting type lighting fixtures, most of the manufacturers at this stage use low-power polycrystalline packages, and some manufacturers adopt high-power polycrystalline packages.
Figure-2 LED lamps for various specifications of LEDs
Cost comparison between LED and traditional light source
As for the cost comparison between the LED light source and the traditional light source, the Lm (Lumen per dollar) of the current LED is about USD 0.01~0.02. Since the price of LED has dropped sharply last year, the price difference compared with the traditional power-saving bulb has been reduced from 5 to 10 times last year to 2 to 4 times. This is also the reason why LED lighting has gradually warmed up this year.
However, because the traditional lighting market is very mature, the brightness and price of traditional lamps do not change in the same proportion, but the LEDs are different. Since the LED is a semiconductor component, the price and brightness will increase in the same proportion. In terms of price considerations, the current LED bulbs below 10W have the highest penetration rate. As for the LED light bar, since the price difference between the product and the traditional lamp is more than 20 times, it is still available in commercial space or government standard.
Figure-3 LED vs. Fluorescent Lm
European and American lighting LED suppliers
CREE
CREE is an integrated supplier of upstream chip to package. The Xlamp series launched in recent years has been well received in lighting-grade LEDs, and is very competitive in terms of luminous efficiency and longevity. The main reason is that silicon carbide substrate (Silicone Carbide) is used instead of sapphire substrate. The thermal conductivity of silicon carbide substrate is almost 10 times that of sapphire substrate (Silicone Carbide has 10 times Vertical thermal characteristics than Saphire). Conductivity directs heat directly in the vertical direction. In addition, there are unique patented technologies for the formulation and coating of phosphor powder. In 2009, the upcoming Energy Star specification in the United States, CREE has been able to meet the current stage, and has also passed most of the projects tested by LM 79 and LM 80. Therefore, for future lighting products that want to be shipped to the United States, CREE The LEDs will have considerable advantages.
The High Power Xlamp series currently includes XR-E (7090 package), XR-C, XP-E (3535 package), XP-C, and MC-E (7090 4 crystal package) specifications. The difference between the specifications of XP and XR is the size of the package. The size of XP is reduced by nearly 80%, which can effectively reduce the material cost and achieve the same luminous efficiency as the XR series. However, the maximum recommended operating current is reduced from 1Amp of the XR series to 700mA. The XP-E has a luminous efficiency of up to 114Lm/W (cool white) MIN and has been shipped in large quantities. The MC-E is packaged in four high-power polycrystalline packages with an overall luminous flux of up to 430Lm@350mA. The recommended maximum operating current is 700mA.
OSRAM
Lighting giant Osram (OSRAM) responsible subsidiary OSRAM Opto Semiconductors (OSRAM Opto Semiconductors) LED field. OSRAM Opto Semiconductors has the ability to integrate from chip to package and has several patents for white light. A high-brightness LED was developed on the chip side using ThinGaN technology, first forming a metal film on the InGaN layer, and then stripping the sapphire. In this way, the metal film will produce a mapping effect and get more light to be taken out.
In terms of high-power product line specifications, it is classified into Golden DRAGON (1W), Platinum DRAGON (3W), and Diamond DRAGON (5W) depending on the power. They are all packaged in PLCC with a single high-power LED . Taking the LUW W5AM and LCW W5AM, the main products of the current Golden DRAGON series, as an example, the luminous flux can reach 112-130 lm and 71-82 lm, and the luminous efficiencies are 100 lm/W and 64 lm/W, respectively.
Japanese lighting LED supplier
Nichia
Nichia's main products are low-power polycrystalline packaged LEDs by paralleling multiple low-power LED chips on the PLCC package. Since the current distributed by each small chip is extremely small, high luminous efficiency and the advantage of not requiring much heat dissipation can be achieved. In terms of product strategy, Nichia and Lumonus will also launch high-power LED products this year.
Nichia's 083 specification introduced last year is also a preference for many LED luminaire manufacturers. Taking the current mainstream 083B as an example, driving at 3.3V at 300mA, the luminous efficiency can reach 100Lm/W.
Toyoda Gosei
3C backlighting market share in Japan is high in plant Toyoda Gosei (Toyoda Gosei, TG) will also launch 3W high power LED products this year. In a single-chip package, the High power LED is placed on the ceramic substrate by Flip chip technology, and the number of refractions is increased by the reflective layer at the bottom. Since the lead frame is not required, there is no problem of shielding the lead frame, which helps to improve the luminous efficiency, the luminous efficiency can reach 80Lm/W, and the product size is only 3.5*3.5mm. This product is made of inorganic materials and has the advantages of high reliability and long life. Currently in the sample delivery stage, it is expected to be mass-produced this year.
Taiwan lighting LED supplier
Edison
Edison is a well-known high-power LED packaging manufacturer in Taiwan. High-power LED components are mainly in the form of Lead frame packages, and in the second half of 2008, components of smaller COB packages were also introduced. Available LED specifications range from 1W to 100W.
Take Ediexeon ARC as an example, using Taiwan's chip, Lead frame single crystal package form, respectively, to provide 1W / 3W specifications. At 350 mA, the luminous efficiency can reach 100 Lm/W. The measured 3000 hours light decay is about 3%. Mainly used in indoor and commercial space lighting fixtures.
Another series of Edistars is available in a high power polycrystalline package on a ceramic substrate. The specifications are 50W/100W, the luminous flux can reach 4000/7000Lm, and the luminous efficiency can reach 70Lm/W. Since it can be directly applied to street lamps, customer inquiries are high. However, since the heat dissipation problem of the high-power polycrystalline package is not easy to handle, it will affect the light efficiency and life. Therefore, the customer who wants to use the lamp must have considerable heat-dissipating ability to consider purchasing this specification.
Qi Wei Optoelectronics
Qiqi Optoelectronics Co., Ltd. was founded in 2004 and applied for patents in the United States through its parent company LUSTROUS. It is manufactured by Qiqi and sold under the LUSTROUS brand.
Qi Wei's general manager Liu Jiaqi particularly emphasized the company's own high-power COB packaging patents. Since the COB packages on the market almost all have parallel structures, only Qiqi has the ability to make vertical structures. Its high-power LED components are COB-packaged in a silicon wafer, mixed with white light through a nitrided two-color phosphor, and added to the optics after encapsulation.
The main product specifications range from 5W to 10W, and 15W products will be developed in the future. At present, the new products are based on the following three specifications. The Diamond/Diamond Pro series has a luminous efficiency of 70-80 Lm/W and a CRI of about 75%. The Crystal series has a color rendering of 92%, which is suitable for the lighting of merchandise in department stores and display cabinets. The company's high-power LED components last about 15,000 hours.
New strong photoelectric
In the past, Xinqiang Optoelectronics, which has more ink in the field of LED street lamps, has gradually changed its product strategy. Since 2008, the company has been promoting its light source engine and developing a variety of indoor or commercial lighting fixtures. Chairman Chen Zhenxian of Xinqiang Optoelectronics emphasized that the company has a number of patents for chip, package and heat dissipation. Therefore, the new LED components are designed by the chip end and are manufactured outside. The subsequent packaging and cooling engine are integrated into one line, which is one of the few high-power LED suppliers in Taiwan that can integrate chip-to-package.
Neoqiang's latest product, the NeoPac Emitter, is a high-power polycrystalline package of LED components. The 30W LED luminous flux can be maintained at 1,500Lm and the size is only 14.1x14.1mm. Although the luminous efficiency is only 50Lm/W, the junction temperature can be controlled at 60 °C with its own thermal module to ensure the durability of the LED light source and maintain its optical characteristics. Chairman Chen Zhenxian stressed that the current measured light decay data has reached 21,000 hours. It is estimated that the product life can reach more than 60,000 hours at room temperature 25 °C. This year, 70Lm/W NeoPac Emitter specifications will also be released.
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