After the appearance of a small LED bulbs, using a new power supply and the 4 floor is the key

SHARP and Toshiba lighting technology from February 2010 have begun to supply the shape and small E17 bulb close to the LED bulb (Figure 1). E17 lighting market supply is expected to increase "(Toshiba Technology Department headquarters LED lighting technology products LED products is mainly responsible for the people and products, counselor Sakai Shing) is expected to E17 type LED bulb in 2012 will account for 4 of Japanese domestic market about lighting (Figure 2).

SHARP uses LED bulbs for display

SHARP and Toshiba lighting technology in order to open up the market is expected to grow, the use of miniaturization technology to challenge the field. Two companies through the newly developed power supply circuit and LED packaging, to achieve the miniaturization of products.

Figure 1: close to the shape of the E17 bulb SHARP and Toshiba lighting technology listed in February 2010 with the E17 bulb shape close to the LED bulb. Two the company's power consumption, life and support different lamps. LED light bulbs are provided by two companies.

Figure 2:E17 the proportion of bulbs is increasing using SHARP data based on the data. Because the decimal point second place for four to five, the total value is not after the 100%.

SHARP AQUOS TV power development team

"First design and development" (SHARP health and environmental protection system business LED lighting business promotion center, deputy director and commodity planning minister Momoi Kohao). SHARP uses an infinitely close to the E17 shape design of the bulb.

In order to achieve the miniaturization of the power supply circuit, the company put the LCD TV "AQUOS" power development team. In the use of the original E26 type LED bulb power circuit, the transformer and the electrolytic capacitor is too large, can not be stored in the E17 bulb. Therefore, the power development team of AQUOS significantly improved the power supply circuit, and the way had changed buck flyback mode. In this way, the transformer is greatly miniaturized, and the electrolytic capacitor is successfully replaced with a small ceramic capacitor (Figure 3).

However, in order to achieve miniaturization, had to adopt higher than the original price of electronic components. In order to control costs, SHARP by increasing the production of LED bulbs to reduce the purchase price of electronic components. Prior to the LED bulb production scale of 200 thousand per month, and this increase to the monthly 500 thousand. This is because in the use of semiconductor and electronic components of this point, the same lighting and digital home appliances. Mass production can reduce costs "(peach wells).

Another factor to achieve miniaturization is the newly developed LED package, the package can be installed in the 12mm x 15mm package 40 blue LED chips. The original arrangement with a number of blue LED chips in the number of mm square package, so the E17 type LED bulbs can not be configured for a sufficient number of note 1).

Note 1) the characteristics of the new development package is not only to achieve miniaturization. In addition to adjust the color of the blue LED chip in the package in the first place, through the use of ceramic substrate instead of the original resin substrate, can inhibit the aging of the product.

SHARP has been in the supply of type LED E17 bulbs, from the beginning of 2010, the production of blue chip LED. First of all, to the company's internal supply, it is estimated that some of the E17 LED bulbs are equipped with this blue LED chip.

Using 4 layers to achieve miniaturization

Toshiba lighting will be printed plate power supply circuit from both sides of the original floor replaced 4 floor products, and will also replace the electrolytic capacitors and other electronic components for small parts, so as to achieve the miniaturization (Figure 4). According to reports, this is the first time the company uses 4 layers of printed LED bulbs on the floor.

Figure 3: transformers and capacitors to achieve the miniaturization of the summer to achieve the miniaturization of transformers, capacitors, etc., so that the power supply circuit can be incorporated in the E17 type products (a, B). Also developed a high-density LED chip package (C).

Figure 4: switch to the use of the 4 floor Toshiba lighting technology will be replaced by the two sides of the bottom plate for the 4 floor, reducing the floor area (a). Production of LED package using a self-developed installation device (B). Data for Toshiba lighting technology.

The use of a 4 layer printing base plate and a cost increase portion resulting in miniaturization of the electronic components are offset by reducing the manufacturing cost of the other components. For example, the manufacture of a hemispherical resin shade named Glove has been changed to minimize the amount of resin used for heat dissipation. Note 2)

Note 2) in order to make light uniform irradiation, the use of uniform thickness of the resin "blow forming" technology. The use of a relatively thick "injection molding" technology to reduce costs. The thicker part can be used in the place where there is no light irradiation.

LED package through the installation of 56 blue LED chip in a single package, to achieve miniaturization. In order to high-density equipped with LED chip, the company has developed a product assembly device. Blue LED chips are purchased from other companies.

Toshiba lighting technology of the E17 type LED lamp is characterized by the support of a sealed instrument note 3). In this regard, SHARP's peach Wells said, because there is no production of lighting appliances, it is difficult to carry out a variety of instruments to verify, so SHARP does not support the sealing device. (reporter: River)

Note 3) in addition, Toshiba lighting technology LED bulb 1W power consumption brightness (flux) up to 85.3lm/W (day white products). SHARP's products in order to support dimmer, power consumption slightly larger.