Rohm Co Ltd prototyped an OLED shadowless lamp and an OLED flash, and exhibited them at CEATEC JAPAN 2008.
The "shadowless lamp" uses an OLED lighting device with a cover that intricately diffuses light in a complex manner so that the objects illuminated by the light have no shadow. The flash is capable of instantaneously emitting light with a high luminance of 100,000cd/m2. When not used as a flash, it can be used as OLED lighting equipment with a luminance of 3,000-4,000cd/m2 or higher.
The OLED flash is composed of 40mm-square light emitting modules arranged in six rows and eight columns. Rohm demonstrated that the luminance of the flash can be controlled in a wide range, from dim light to bright light of several thousand candelas per square meter at the maximum. Also, in the demonstration, the flash emitted light with a luminance of 100,000cd/m2 three times.
The company, however, "cannot specify the operating current and voltage, etc, as the light and the flash are presented only for reference," it said.
Rohm is actively promoting commercialization of OLED lighting technology. For example, the company acquired engineers, intellectual property, manufacturing facilities, etc relating to the OLED lighting technology that had been developed by IMES Co Ltd in December 2007.
In addition, Rohm established Lumiotec Inc in collaboration with Mitsubishi Heavy Industries Ltd, Toppan Printing Co Ltd, Mitsui & Co Ltd and other companies in May 2008 with a view to commercializing OLED lighting equipment.
Lumiotec demonstrated its OLED lighting equipment dubbed "Fenalene" at Rohm's booth. It reportedly has a luminance of 5,500cd/m2 and a life of 10,000 hours.