Detailed Cree luminous flux can exceed 1000lm small white LED

The United States began to put into production CREE white LED MPL EasyWhite, the product at the input power of 11.3W, the minimum luminous flux of 900Lm Xlamp. When the input power is 22W, the luminous flux exceeds 1000lm. Packaging area of 13.15mm * 12.15mm. Cree said that as luminous flux can be more than 1000lm of white LED, its packaging area to achieve a minimum level. Currently, responsible for Cree products in the daily sales of Arrow UEC Japan company has begun selling Xlamp MPL EasyWhite.

Xlamp MPL EasyWhite color temperature for the 4000K model, as well as the color temperature of two models 2700K. According to the different brightness, these two products are 2 grades, luminous flux, 4000K products in the input power is 11.3W, minimum 900Lm and minimum 800lm; 2700K products for the minimum 800lm and the minimum 700lm in the same condition. Cree said the power supply for the current flowing through the 11.3W is 450mA, if the current is increased to 600mA, while the luminous flux can be increased to about 1.2 times before, if the current is further increased to 750mA (power equivalent to 19.9W), will further increase the luminous flux of about 1.1 times. If the 11.3W power supply is connected to the time of the minimum 900Lm of the model to calculate, when the 19.9W power supply is equivalent to the luminous flux is close to 1200lm. Sample price, color temperature is 4000K, luminous flux of 900Lm models for 3000 yen, color temperature of 2700K, luminous flux of 700lm models for the yen of 2500.

Cree hopes to replace the use of new products such as Light (Spot) used in the halogen lamps. By reducing the package area of the product, it is easy to apply to a spotlight such as a MR16 type halogen lamp. Cree said, previously used 5 to 6 white LED luminous flux obtained, with only of the product is enough (Arrow UEC Japan sales of the new product group business development manager Kimura Ichiaki). Cree also stressed that in the past the plurality of white LED color temperature and luminous flux of each white LED mutual deviation, by contrast, due to the white LED is the single use, so the bias problem smoothly done or easily solved. The company plans to provide not only white LED, but also with the drive circuit, printed circuit boards and lenses, etc., to provide lighting manufacturers to provide product solutions.

Package 24 Middle Size chip

In order to obtain a larger luminous flux under a smaller package size, the Cree reduces the thermal resistance of the white LED and encapsulates 24 blue LED chips. According to reports, the thermal resistance of new products is 3 DEG /W, and can get hundreds of LM luminous flux of other companies white LED is 6 to 10 DEG /W, the thermal resistance compared to less than half of new products. Although the method of reducing the thermal resistance is not published, but from the appearance of the package, it seems that the use of ceramic substrate.

White LED package in the blue LED chip, is known as the size of Middle Size products. Cree said, this is called between the standard size of about 300 m square, and is known as the large size of 1mm square size, it also has the advantages of high light efficiency, standard size and large size unit chip can larger flux have advantages. Each blue LED chip is coated with a yellow phosphor, resulting in white light. The luminescence spectrum of the whole package is the superposition of 24 LED chips. If there are differences between the 24 LED chips in the individual light emission spectrum, but because of the superposition of the 24, the emission spectrum will not be very different. In addition, 24 blue LED chip, with a series of 8 columns in series, parallel to the connection of the 3 columns in the way of the 1. (Editor: maysoong)