How a laser phosphor illumination system works

laser phosphor

  • 1

    Blue laser diodes

  • 2

    Focus lens

  • 3

    Phosphor wheel

  • 4

    Colour wheel

  • 5

    Image processing

To generate the three primary colours in a 1DLP® laser phosphor projector, the laser diode shines blue laser light onto a phosphor wheel. The wheel creates yellow and green light, while blue laser light passes through an opening in the phosphor wheel.

The projector then sends the yellow and green light through a colour wheel to generate red or further enhance green, while the blue laser light passes through a diffusion window in the colour wheel.

These red, green, yellow and blue colours are then directed onto an imaging surface, such as a DLP chip which directs the light through a lens and onto the projection screen.

Laser phosphor technology variants

blue laser diodes

Typical laser phosphor

Employs blue laser diodes shining
onto a phosphor wheel.

blue laser diodes red LED light

Laser phosphor hybrid

Same as a typical laser phosphor projector
but adds a red LED light source to boost
the red colour component.

blue laser diodes red LED light

Laser phosphor with red laser

Similar to a laser hybrid, but employs a red laser
diode instead of an LED to produce better
overall saturation and realistic colours.
Forms the basis for Christie BoldColor Technology.

Learn more about laser phosphor illumination technology


Shining a light
on laser phosphor


Anatomy of a
laser phosphor


Christie BoldColor



10 advantages of laser phosphor

  • lampNo lamp changes required
  • hoursUp to 20,000 + hours operational life
  • No need for filters (in many designs)
  • maintenanceReduces down-time and maintenance
  • costsLower cost of ownership for some applications
  • energyLow energy consumption
  • 24724×7 operation
  • instantInstant on/off capabilities
  • levelChoice of entry-level models to premium projectors
  • gamutMost designs have similar brightness, contrast and colour performance to lamp-based projectors