Osram Advanced Power TopLED Plus offers 15% more light for large LCDs

Oct. 15, 2008
Date Announced: 15 Oct 2008 The new Advanced Power TopLED Plus from OSRAM Opto Semiconductors is the brightest colored LED in its class, providing 15% more light for direct display backlighting than its predecessor. It also puts other LEDs in the shade in terms of its efficiency. Depending on the display, the LEDs in the usual combination of red (623 nm), green (527 nm) and blue (457 nm) cover more than 125% of the NTSC color gamut. They are suitable for all directly backlit displays, particularly for large formats of 24 inches and more. These new stars offer an optimized ratio of display brightness to display thickness with the minimum number of LEDs necessary.The greater brightness of the Advanced Power TopLED Plus comes mainly from the special lens designed for backlighting. At an operating current of 100 mA the LEDs now achieve 14 lm (red), 24 lm (green) and 28 mW/sr (blue). The newly developed lens ensures absolutely uniform display backlighting. The chips used have an edge length of 500 μm and are fabricated in the latest ThinGaN or Thinfilm technology so that the light sources achieve the highest efficiency in their class: 65 lm/W (red), 59 lm/W (green) and 27% overall efficiency (blue). A life of more than 50,000 hours fits perfectly with the lifespan of displays and monitors. The low height of the LEDs of only 2.25 mm means that the backlighting can be very thin indeed.Advanced Power TopLED Plus is suitable for all display sizes, with the focus on screen diagonals of 24 inches and more. Projects are already under way with key customers for use in 46 inch monitors. 1200 LEDs are sufficient for this size. Up to now about 600 more LEDs have been needed to produce the same brightness. Winfried Schwedler, Marketing Manager for LED Backlighting at OSRAM Opto Semiconductors, said: “Close relations with our customers and extensive application support enable us to ensure that the special requirements of each and every display are met in full. This includes not only the selection of suitable LEDs but also the logistical support for module manufacture based on the latest simulation methods. The result is extremely homogenous display backlighting.”

Osram Opto Semiconductors

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