Strong bright pulses of light

Super flat displays are now possible thanks to the new TOPLED Compact 4520 from OSRAM Opto Semiconductors. This LED is one of the smallest for screen backlighting and is the first LED for this application to have a UX:3 chip. It is therefore ideal for pulse mode, can be loaded with a very high current and helps produce razor sharp pictures.

The trend toward flatter and flatter displays calls for exceptionally slim backlighting systems and high quality of light. These are precisely the properties that the new TOPLED Compact 4520 has to offer. This tiny light source with a brightness of 35 lm (at 150mA) and an efficiency of 72 lm/W is suitable for single or double-sided injection of light into light guides up to 2 mm and covers a color space of more than 100% sRGB. Thanks to its UX:3 chip, which offer excellent linearity between current and brightness, it is brighter in high-current pulse mode than all the LEDs based on other chip technologies.

"The TOPLED Compact 4520 has been designed specifically for super flat displays", said Winfried Schwedler, Marketing Manager Backlighting at OSRAM Opto Semiconductors. "Its extreme brightness and high-current pulse mode help produce razor sharp high-contrast images with no wipe effects." Pulse mode provides greater contrast on dark images by darkening or dimming individual segments of the image. It also prevents wipe effects on fast moving images. To achieve this, parts of the backlighting are briefly switched off. This takes place so quickly that the human eye cannot detect the dark phases. The overall result is a bright image with consistent color quality.

Like the other members of the TOPLED family, the TOPLED Compact 4520 is flat encapsulated and does not have a lens. It is therefore ideal for single or double-sided injecting in light guides. The tried and tested TOPLED package measures 4.5 x 2.0 x 0.8 mm. It is synonymous with reliability and can be manufactured in large volumes.