LED color control affect the future development of space

2005 North American Lighting Exhibition LED color control affects the future development of space in 2005 North American Lighting Exhibition LED related products, LED future development dynamic more clearly; the application of LED in lighting, with light color diversification, energy saving, small volume, long service life, low pollution and wide space of design, module of elasticity and many other advantages, so the lighting manufacturers are in the lighting exhibition showcasing its LED related products. The lighting exhibition in addition to a lot of LED lighting manufacturers exhibitors, the world's major LED manufacturers are also actively involved in this lighting exhibition, display their most advanced technical achievements, the following will explain the current status of LED manufacturers related technologies.

Lumileds exhibits this year is divided into new products Luxeon K2 display, LED lighting and LED backlight three. Lumileds this year launched Luxeon K2, as shown in Figure 1 (left) shows that the chip can work a high temperature of 185 DEG C, is better than that of other LED products on the market, and the ratio of Lumileds previous products for nearly 50 degrees, as shown in Figure 2 (right), and the K2 can be configured directly on the PCB board, with high current 400mA when driving, when the environment temperature is 40 DEG, without extra heat sink can work smoothly, generally has the following characteristics: the working temperature of the chip. Up to 185 degrees centigrade. In 350 mA, 60 lm/W, the efficiency of generating white light color temperature 6500K. The maximum operating current of 1500 mA. thermal resistance value 9 DEG /W. by Jedec 2A test. Through the lead-free process.1000mA 50000 hours of work, to maintain the original brightness 70%

LED backlight is suitable for building landscaping Kanban

The use of Lumileds as shown in Figure 2 (left) red, blue and green side shown in type LED, and LED from the light guide lens the lens side, then mixed light to other visible color from white light, can be used in Figure 2 (in) the construction of landscaping in the same board. The panel produces diverse colors, or as electronic devices such as Figure 2 (right) backlight shown in large LCD TV, showing better color saturation, controllability and reproducibility.

The final LED target market in lighting and display at this year's Lumileds product application achievements in general lighting; they use a single chip with different fluorescent powder composition, so as to produce white light of different color temperature and color rendering for landscape lighting, as shown in figure 3. Furthermore, from the Lumiled catalogue that exhibited the lamp shape were elongated or rounded, the specification is shown in Figure 4 and figure 5, color temperature is between 3200 ~ 5000K, CRI is 75 ~ 90, life is up to 50000 hours, and the light flux in bars or circular lamps difference from 270 to LM 700 LM range.

Current status of LED Technology

Gelcore gives a vivid picture

General Electric is one of the world's three largest lighting plants, and its joint venture with Gelcore Emcore, but also in this year's lighting show its LED now and future related products. The existing product (Tetra) focus on Kanban display, color from white light to visible light is diverse, mostly used in all kinds of advertising signs; as for the new products in the future Gelcore will display a high power LED 1W and 4W package, the relevant specification as shown in Figure 6, the 1W product containing a 1 x 1 (mm) chip, while 4W LED is equipped with 3 chips, the biggest difference with other manufacturers of products that use Gelcore wavelength of 405nm UV optical chip to excite the phosphor powder generated across the visible light spectrum of white light, and because the UV is not involved in white light mixing optical chip, chip because of difference produced white little change, reduce speckle.

Furthermore, the use of Gelcore phosphors mixing proportion allocation, give the company a variety of different color temperature of white LED (3000K, 3500K, 4100K, 5000K, 6000K) and CRI (CRI = 70 ~ 95), and increase its efficiency to 25 lm/W, working life up to 20000 hours. The representative works are the products of 1W and 4W, when the power of 1W, LED can produce a luminous flux of 40 LM, 4100K and white color color play 80; such as to improve the power output is 90 to 4W, LM, 3500K color temperature and color rendering of white light 90. As shown in Figure 7 (left), and the actual display of the venue as shown in Figure 7 (right), the use of a variety of different color temperature of white LED lighting, prompting the scene presents a different style, and give the painting a more vivid effect.

Cree ED for half of the total consumption of light bulbs

Cree was a professional chip maker, but in recent years have begun to launch some LED packaging products; this year in the Xlamp 7090 LED consists of all kinds of lamps, produced a total of more than 3500 high brightness, as shown in Figure 8, the venue 190K LM LED lamps produce light flux, the total power consumption is 6500W for general lighting half of the electricity consumption. The use of Cree Xlamp 7090, as shown in Figure 9 (left) shows that the size of 7mm * 9mm, the chip is stuck to the high thermal conductivity of the metal containing circuit board, external preparation of plastic prism chip, the highest working temperature of 125 DEG C, the overall thermal resistance of 17 DEG /W, and the package form is shown in Figure 9 (right), with 350mA current and power 1.8W driver LED, released from 4000K to 6800K color temperature white light, and the total luminous flux of 60 LM, the conversion efficiency is about 30 lm/W.

Nichia1 show different color temperature white LED

Nichia is one of the leading manufacturers of LED related products, in the lighting exhibition also exhibited its LED products and application of the status quo; a distinctive figure 10 (left) of Jupiter and Rigel, the size of 11.2mm * 7.2mm, mixing fluorescent powder packaging using heat resistance resin, adhesive, aluminum with high thermal conductivity the circuit board, 350mA, 3.8V driver LED, power 1.3W, a luminous flux of about 42 LM of white light, after the conversion efficiency is 32 lm/W. In addition, Nichia also exhibited the different color temperature of white LED, shown in Figure 10 (right), 0.6W 0.8mm Rigel LED in thickness, the deployment of fluorescent powder mixing proportion, or red