applications which require excellent colour reproduction

The modules give superbly balanced light, both in terms of colour reproduction and spread, making them suitable for many different types of light fitting. The test where made at a high correlated colour temperature (CCT), 4600Kelvin, and in future it is a strong possibility to achieve this performance at even higher CCT values. The colour rendering index value achieved by the Optodrive modules is far beyond the standards required of workplace lighting where tasks demand extra accuracy in colour perception. It is even possible to use these light sources in applications such as medical lights, kitchen lighting, food retailing, art galleries, fashion or clothes displays and similar applications which require excellent colour reproduction.

The demands of having a CCT that closely replicates the same temperature as a regular light bulb have driven the development of these modules. LEDs have had problems to meet the necessity for warm white light with colour temperature values between 2650K and 4500K with excellent CRI. The Optodrive modules completely satisfy this requirement.Compared to CCFL (cold-cathode fluorescent lamp) backlit displays, the mercury-free2 LED-backlit displays feature superior characteristics such as lower electromagnetic noise and lower power consumption, and offer a wider adjustable luminance range. Also, the new LED-backlit displays do not require the high-voltage and high-frequency circuits needed to control luminance in CCFL-backlit displays, thus enabling a higher level of flexibility in system design in terms of safety, electromagnetic interference (EMI) compensation, and system architecture.

Taiwan’s leading panel maker AU Optronics Corp. (AUO) recently decided to invest NT$30 billion (US$923.08 million) to establish four LED chip factories in Taiwan in the fourth quarter this year, to meet the strong demand for LEDs used in panel backlight modules, Taiwan Economic News reports, and the facilities is planned to begin mass production in late 2010.The four LED chip factories will be operated by AUO subsidiary Lextar Electronics Corp. AUO just poured NT$2.56 billion (US$78.6 million) to procure several metal organic chemical vapor deposition (MOCVD) equipment for expanding Lextar’s capacity. AUO is scheduled to use LED backlight for all its panel products by the end of 2010, creating a huge demand for such lighting source.