The imperfect level of black of the DLP technology had long excluded this technology because of the disturbing perception of the remaining grey and the difficulty of obtaining perfect blending between the images of adjacent projectors.
Today, these limits have been eliminated. The contrast of DLP projectors can reach 7500:1 and the techniques for blending images has been mastered.
The DLP technology can thus enter planetariums.
A full hemisphere can be obtained starting from 5 projectors, requiring a much lower investment than for the other projection technologies while offering a projection of stars on the dome as good as that of an optomechanical system.
Numerous advantages can be mentioned:
- Brightness as high as that of a laser image.
- Very high luminosity on one pixel (ideal for projection of stars).
- Fully digital technology: no maintenance of deformation adjustments.
- Extremely low costs for maintenance and consumable products.
- Very low space requirements for the projectors allowing them to be fitted in small planetariums and those wishing to keep their optomechanical projection equipment.
