Oxtail light source LED filament bulb physical appearance

Oxtail light began in December 2008, LED put into supply samples of bulb type LED incandescent lamp filament LED lamp has been published. This time, Nikkei electronics interviewed the details of the product and the company's production plan.

LED chip with blue LED, and with the combination of the phosphor, can get the color temperature 2500K light. The transparent glass cover is provided with 3 LED chips, and the upper part of the LED chip is provided with 6 elongated parts coated with phosphor, and the shape of the filament is connected with the letter "N" so as to realize the filament shape (Figure 1). As a result, 18 LED chips are used for each bulb.

The LED chip can be seen in a very close range when the light is on (Figure 2). However, in actual use will be installed on the ceiling hanging from the lamp. Within this distance, the human eye feels as though the entire line is emitting light "(Niu Weiguangyuan). Now is the sample supply, so the assembly of components into the process of filament lamp mostly manual work.

In terms of optical properties, the full beam is 18lm, lower than 5W decorative incandescent lamp 25lm. But "the first impression of the impression is equivalent to the 10W's decorative incandescent lamp" (the company). Reporters actually observe the state of the light is also better than the 5W incandescent light, feeling close to 10W incandescent lamp. In addition, the source also pointed out that the LED filament lamp bulb has less advantages than the decorative lamp (Figure 3). In addition, the rated life of 20 thousand hours. In the case of LED lighting is mostly known as life expectancy of up to 40 thousand hours, this figure seems a little small, but the reason is now the sample supply stage. Tail light source said that this is a conservative figure.

Generally speaking, the advantage of LED illumination is that the light of LED irradiation has directivity. The LED filament bulb is developed to achieve a full range of light that has never been seen in a previous LED lighting source (Figure 4). On the production target, the company said: "we are characterized by a variety of small quantities of production. This can be in the LED lighting industry has not yet set foot in the leading vendors, has not yet attempted to use the field of LED play an advantage in the field (the company).

The product has been developed from 2 years ago. The products which have been exhibited in 2007 the internal light source products oxtail exhibition, but the final position in the experimental stage. In addition to the existing products for the replacement of the use of lamps and lanterns, but also with the lighting manufacturers and lighting designers, ready to open up the full advantage of the new lighting appliances and other purposes (the company). In addition, the future plans to develop more bright lights. As far as the brightness is concerned, it is possible to increase the brightness by increasing the efficiency, rather than by increasing the LED.

As mentioned in the previous report, the product will be sold in the next year (after April 2009) with annual sales of 100 thousand. In addition, the company will be held on March 2009 3 ~ 6 in Tokyo, the International Exhibition Center held in the Lighting Fair (the Ninth International Lighting Exhibition) on the display LED filament bulbs.

Figure 1: Ushio Hikaruwon "LED filament lamp" light emitting part. The 6 parts are connected by zigzag to realize the filament shape.

Figure 2: in the very close distance to observe the state of light, you can see the location of the LED chip.

Figure 3: holding a glowing LED filament bulb in hand, it doesn't feel hot at all.

Figure 4:LED filament lamp (left) and 10W decorative incandescent (right) side by side.