News Article
Osram reveals versatile LEDs for white light staging
The company has added tuneable white multichip III-nitride LEDs to its spotlight range
Osram Ostar Stage LEDs offer a luminance of 48 million candelas per square metre (Mcd/m²) and tuneable colour tones from cold white to warm white.
Combined with a low-profile design and glass cover with an anti-reflective coating, they provide the basis for compact spotlights with an extremely narrow beam.
These LEDs are ideal for use in moving head spotlights on stage as shown below. They can also be used for booth lighting at trade fairs and for architectural lighting.
The special feature of the new LED is its tuneable white light colour. Two warm-white and two cold-white chips, arranged diagonally in the package, enable colours to be mixed well at component level and allow all white tones between colour temperatures of 2700 Kelvin (K) (warm white) and 10,000 K (cold white) to be produced with appropriate control.
The LED achieves a colour rendering index of 94 for warm white and 74 for cold white.
Instead of the usual lens, the LEDs have a flat glass cover with an anti-reflective coating, making them ideal for injecting the light into lens systems.
The device's etendue (the emission angle/area ratio of the emitting light surface to the projected light surface) in conjunction with external optics is retained, enabling realising a very narrow beam of light (+/- 9°).
Osram Ostar Stage LED
Osram says this beam is twice as small as spotlights based on plastic-encapsulated LEDs. Hence, the luminance of the spotlight is increased by a factor of two.
Thanks to the glass cover, the Osram Ostar Stage LED also has a much lower profile than previous standard components. At 1.23 mm, its height is only one quarter of the usual component height and its footprint is just 5.9 mm x 4.8 mm. Spotlights can therefore be made very compact.
All versions of the Osram Ostar Stage are based on the Osram Ostar SMT platform and are suitable for standard solder processes. The chips are fabricated using thin-film technology making almost all the light produced internally emitted at the top.
The LED is therefore ideal for use with external optics. In continuous operation (DC) the chips can handle an operating current of up to 900 mA. This gives maximum values of 390 lumen (lm) in cold white (10,000 K) and 210 lm in warm white (2700 K).
At a typical value of 1.8 K/W the thermal resistance is very low and heat removal is therefore not a problem. In constant use, the LEDs will last for more than 50,000 hours, giving the moving heads and architectural fixtures a long life.
Wolfgang Schnabel, LED Marketing Industrial Applications at Osram Opto Semiconductors, says, “Three versions of the Osram Ostar Stage LED are available, the Multi Color (RGBW), the pure white and now the tuneable white. The range of applications is therefore now greater than ever before. With so many colours and configurations lamp designers have a virtually unlimited set of options.”
The company will be showcasing the Osram Ostar Stage LED at Prolight + Sound 2013 from April 10th to 13th in Frankfurt at Hall 9.0, Stand D10. Osram will also provide information on its other latest products.
Combined with a low-profile design and glass cover with an anti-reflective coating, they provide the basis for compact spotlights with an extremely narrow beam.
These LEDs are ideal for use in moving head spotlights on stage as shown below. They can also be used for booth lighting at trade fairs and for architectural lighting.
The special feature of the new LED is its tuneable white light colour. Two warm-white and two cold-white chips, arranged diagonally in the package, enable colours to be mixed well at component level and allow all white tones between colour temperatures of 2700 Kelvin (K) (warm white) and 10,000 K (cold white) to be produced with appropriate control.
The LED achieves a colour rendering index of 94 for warm white and 74 for cold white.
Instead of the usual lens, the LEDs have a flat glass cover with an anti-reflective coating, making them ideal for injecting the light into lens systems.
The device's etendue (the emission angle/area ratio of the emitting light surface to the projected light surface) in conjunction with external optics is retained, enabling realising a very narrow beam of light (+/- 9°).
Osram Ostar Stage LED
Osram says this beam is twice as small as spotlights based on plastic-encapsulated LEDs. Hence, the luminance of the spotlight is increased by a factor of two.
Thanks to the glass cover, the Osram Ostar Stage LED also has a much lower profile than previous standard components. At 1.23 mm, its height is only one quarter of the usual component height and its footprint is just 5.9 mm x 4.8 mm. Spotlights can therefore be made very compact.
All versions of the Osram Ostar Stage are based on the Osram Ostar SMT platform and are suitable for standard solder processes. The chips are fabricated using thin-film technology making almost all the light produced internally emitted at the top.
The LED is therefore ideal for use with external optics. In continuous operation (DC) the chips can handle an operating current of up to 900 mA. This gives maximum values of 390 lumen (lm) in cold white (10,000 K) and 210 lm in warm white (2700 K).
At a typical value of 1.8 K/W the thermal resistance is very low and heat removal is therefore not a problem. In constant use, the LEDs will last for more than 50,000 hours, giving the moving heads and architectural fixtures a long life.
Wolfgang Schnabel, LED Marketing Industrial Applications at Osram Opto Semiconductors, says, “Three versions of the Osram Ostar Stage LED are available, the Multi Color (RGBW), the pure white and now the tuneable white. The range of applications is therefore now greater than ever before. With so many colours and configurations lamp designers have a virtually unlimited set of options.”
The company will be showcasing the Osram Ostar Stage LED at Prolight + Sound 2013 from April 10th to 13th in Frankfurt at Hall 9.0, Stand D10. Osram will also provide information on its other latest products.
