SOURCE: Seoul Semiconductor

August 26, 2009 12:00 ET

Seoul Semiconductor's Acriche Family Exceeds DC LED Efficiency

Announcing a New Acriche Device, the A4 -- Alternating Current (AC) LED With Better Luminous Efficiency Than Direct Current (DC) LED

Luminous Efficiency of 75lm/W, Color Rendering Index (CRI) Greater Than 85

SEOUL, SOUTH KOREA--(Marketwire - August 26, 2009) - Seoul Semiconductor Inc. (CEO Chung Hoon Lee,, a world-leading LED manufacturer held a press conference in Korea, the US and China on August 26th to celebrate a new product, the Acriche A4 with the world's best luminous efficiency of 75lm/W, and introduced the A4 to the mass market.

Two-third's of the world's lighting consists of warm white lights (2700K to 3000K); the newly announced product is to be mass produced and readily available this quarter, capable of replacing warm white incandescent and CFL light sources in many applications.

Currently, white LEDs are divided into two major markets: products with a High Color Rendering Index (CRI) greater than 85, which is close to natural light, and products with a Normal CRI of 70 to 80. High CRI products will often be significantly less bright than their lower CRI counterparts, but due to their similarity to natural light High CRI sources are excellent for high quality light applications. LEDs with normal CRI focus more on brightness than on color and have the disadvantage of being different from natural light. Consequently, a compromise was required between brightness and CRI.

The new and highly innovative Acriche A4 product has technology that is able to satisfy both CRI and brightness. The past requirement of lowering luminous efficiency by several tens of percent is overcome by the A4. The A4 devices have a color temperature of 3000K and include multiple new technologies that provide excellent efficiency of 75 lumens per watt (lm/W) with a High CRI of 85.

Alternating Current (AC) LEDs with better luminous efficiency than LEDs with Direct Current (DC) for the first time is very significant. Seoul Semiconductor stated that "with the mass production of the Acriche A4 series, we will be able to provide both high quality and normal use markets with light sources that have exceptional performance and lower prices. With the A4 series, we want to spread the name 'Acriche' far and wide as the world's best LED brand."

Significant advantages of the Acriche A4 series include:

--  It is possible to use Acriche products on AC power freely between
    100V and 230V without additional conversion. Only a simple, inexpensive
    diode bridge is required.
--  Different than other Acriche products (such as the popular A2 and A3
    series), the A4 uses 50Vrms per package and 110V-220V can be achieved by
    connecting multiple devices in whatever manner is needed.
--  Whether used in light bulbs or light structures with arrays of LEDs,
    the best suitable design is guaranteed due to the degree of freedom of
    placement and configuration of the A4.

* CRI (Color Rendering Index):

Color Rendering Index (Ra) indicates how much a light resembles a natural light source with the influence of the light on various colors of objects. It is measured in units from 0 to 100, where 100 indicates the most similar to natural light.

About Seoul Semiconductor (

Seoul Semiconductor is a world-leading LED manufacturer. The growth potential of the company is widely recognized as it was selected as 'one of the most promising companies in Asia' by Forbes and Business Week in 2006 and 2007, respectively. Its main offering, the Acriche™ LED, was also named "Product of the Year" by Electronik in 2006, one of the most prestigious electronics publications in Europe, and awarded in Newtech Korea 2008 and named as Korea Ten Best New Technologies of 2008. Seoul Semiconductor's Intelligential Property position is extremely strong with over 5,000 patents filed or registered and many cross-license agreements with industry leaders. Seoul also has 25 overseas operations, including 3 subsidiaries, and 114 worldwide distributor sites.

Contact Information

  • For more information please contact
    Hyesun Paek
    Marketing PR Manager (in Korea)
    E-mail : Email Contact
    Tel : +82-31-364-3787

    Minbok Song
    PR AE, PR Agency of Seoul Semiconductor
    E-mail: Email Contact
    Tel: +82-2-3210-9680