Japan FirstSystem digital billboard lighting LED panel

Figure 1: equipped with 25 white LED LED panels

Japan FirstSystem developed a panel arrangement within the 25 white LED lighting panel digital billboards with LED "SHELLPA-1", and in March 08 special planning 4 ~ 7 days to hold "decorative street circulation Renaissance" exhibition the exhibition "LED Next Stage" on the display (Figure 1). Panel size is 298mm * 298mm, thick 18.5mm, each 10lm luminous flux of white LED in the form of the spacing of 60mm in the panel. Panel overall power consumption of 4.5W. Direct connection 100V AC can be lit. If you set the diffusion plate at a distance of 60mm light-emitting surface, can realize uniform lighting panel. The average color rendering index (Ra) of the products was 70 and 90, and the Ra was less than 30% of the varieties with brightness of about Ra (). Not only can we use the panel alone, but also can be arranged like a ceramic tile to enlarge the luminous area (Figure 2). Scheduled for June 08 mass production.

Figure 2: an example of the arrangement of 9 panels with a diffuser plate

White LED is a combination of phosphor material on the blue LED chip. The product uses the South Korean semiconductor company (Seoul Semiconductor) produced white LED. United States CREE blue LED chip, TOYOTA synthesis of phosphor - BOS (Barium ortho-Silicate) materials and packaging technology of Seoul semiconductor.

Source: Nikkei BP