Osram Opto Semiconductors has developed what it claimed is the smallest RGB Multi ChipLED, which is taregted at colour video screens with large diagonals and small viewing distances.

The significance of the small LED package is that larger numbers of pixels to be accommodated in a small display area.

The miniature package measures 1.6x1.6mm and is 0.9mm high.

A 2.5 x 4.0 m display achieves a system luminance of 1500-2500 cd/m². "This corresponds to around ten times the luminance of a conventional LCD TFT screen," said Osram.

Inside the Multi ChipLED there is a red chip and a blue and a green chip in Thinfilm and ThinGaN technology. If the RGB-LED is operated with a current of 20 mA the individual chips produce typical luminous intensities of 250 mcd (red), 350 mcd (green) and 70 mcd (blue).

The typical efficiency of this luminous intensity is 4 cd/W, which corresponds to a luminous efficacy of 12 lm/W. The beam angle of the LED is +- 60°.

More information: www.osram-os.com