Rohm exhibited a planer LED lighting panel using LED packages with a high color-rendering index. Arranging LED packages on a plane surface and covering them with a light diffusion plate makes the panel glow. It emits light from the entire surface of the panel like an Organic Light Emitting Diode (OLED) lighting panel. By using its fluorescent material technologies, Rohm realized a general color-rendering index (Ra) as high as 98 and prevented the sulfuration of lead frame, which lowers color-rendering index.
Simply described, silver plating of an LED package’s lead frame, on which an LED chip is mounted, is reacted with hydrogen sulfide contained in the air coming through the package material and blackened, gradually lowering color rendering index. The LED package developed by Rohm has a white resin layer that reflects light between the package material and lead frame to prevent the sulfuration.
Rohm also engineered in high heat resistance and a product life, the time it takes for the light flux to lower by 30%, of 50,000 hours at a temperature of 110°C.
For the lighting panel, the company employed a special LED. Rohm says the panel is superior to OLED lighting apparatuses in terms of cost and luminous efficiency. The luminous efficiency of the panel was not disclosed.
Though Rohm has not yet decided when to commercialize the panel, the firm says that the technologies necessary to build the panel have almost been completed and that the company will discuss the commercialization with Agled Co Ltd, its subsidiary.
CEATEC, regarded as the Japanese equivalent of U.S. Consumer Electronics Show, provides a platform for companies and organizations from all over the world to showcase their cutting-edge products, services and technologies. The event also serves as key industry networking and information-gathering opportunity, with numerous seminars and other activities offered during the event.
CEATEC is relevant because much of what is shown makes it to market. The Japanese version is also a bit more leading edge than the U.S. show. Some products that show well in Japan are not necessarily going to get to the U.S.
The lamp that Rohm could be offering promises a nice light source based on the efficient LED. Lets hope they make them for the big box home improvement stores here soon.