How a laser phosphor illumination system works

How a laser phosphor illumination system works

  • 1

    Blue laser diode banks

  • 2

    Focus lens

  • 3

    Phosphor wheel

  • 4

    Dichroic filter

  • 5

    Image processing chip

The majority of laser phosphor projectors shine blue laser light onto a phosphor wheel to create yellow light. Blue light is then combined with the yellow light to create white light.

This white light is split into three primary – red, green and blue colours using a prism or a colour wheel. From these primary colours, a laser phosphor projector is able to reproduce a wide variety of different colours.

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