Osram Opto Semiconductors GmbH of Regensburg, Germany says that, due to its technology, a recent 'Glasses Free 3D Display' introduced by Atech Korea Co Ltd measures up to 500-inches. The video display walls are intended to be used in indoor public areas, such as shopping malls and exhibition halls. With a contrast ratio of 4000:1 and screen brightness at 4500cd/m2, the viewing distance can be up to 30m.
Glasses Free 3D Displays were introduced more than a year ago, but the adoption rate in large-size applications has been unsatisfactory, says Osram Opto. The existing displays are in fact LCD displays with backlit LEDs or edge-lit LEDs. With this technology, the size of a display is constrained by the size of LCD panels. However, due to recent work by Atech using Osram's Multi Chipled to produce a truly 3D LED display, this size barrier has been overcome. The LEDs emit light directly and operate as individual pixels with a 'Lenticular Lens' developed by Atech to create high-definition (HD) 3D images.
"We have chosen Osram's Multi Chipled LEDs because the RGB chips in these LEDs can be driven individually to mix any color required, thereby producing extremely accurate pixel colors for vivid images, and also the product has a black surface with diffused resin to provide the highest contrast possible in our screens," says Atech Korea's president Seokhwa Kim. "They also come in a tiny 1.6mm × 1.6mm × 0.9mm package, making it possible to have a pixel spacing of only 2mm. In effect, millions of pixels can be accommodated in an area of less than 10m2, sufficient to display pictures in resolution of 1980 x 1080 HDTV with brilliant colors and excellent contrast," he adds.
"Our Multi Chipled series come in an ultra-black package that hardly reflects any ambient light at all, and the high image quality is maintained even in very bright environment," says Kai-Chong Cheng, Osram Opto's senior marketing director APAC. "Moreover, the color impression remains constant across the entire viewing angle of 100?. That is why Multi Chipled LEDs are ideal for display applications in public space such as shopping malls, exhibition halls and being a true LED TV," he claims.
Nobody in a public space will be willing to pick up eyewear just to watch public video displays that are mostly of an infotainment nature, reckons Osram Opto. It is therefore believed that the potential of 3D will be unlocked by eliminating the need for glasses. Atech has developed a 'Lenticular Lens' to deliver 3D images without the use of glasses, but this is also capable of converting 3D images to 2D, depending on the display requirements. With the use of Osram's Multi Chipled, these displays have high-resolution, good picture quality and high brightness, says Osram Opto.
