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What is Laser

Laser projector collage

Laser Technologies

Light generated with laser diodes inherently have a longer and more stable brightness level that decreases at a much slower rate than conventional lamp based systems. The laser technology offers the highest image quality while its operating life span far exceeds traditional lighting methods. Under ‘Why Laser’ you can find many more benefits listed.

Blue laser based LCD projectors use three LCD panels to generate the red, green and blue picture part of the visualization, leading to vivid color representation.

Laser Phosphor Technology based on 3LCD Panel Technology

Cost-effective Laser Phosphor projectors use an array of blue laser LEDs to create the blue color in the final image, but another blue laser is also used to illuminate a yellow phosphor wheel, which emits the yellow light. This yellow light is then split by a filter into green and red light components.

Blue laser based LCD projectors use three LCD panels to generate the red, green and blue picture part of the visualization, leading to vivid color representation.

  • Vivid color representation
  • High brightness
  • Low projector weight

 

Single chip DLP plus color wheel projectors generate the red, green and blue colored parts of a picture step by step, providing natural color representation.

Laser Phosphor Technology based on 1-chip DLP Technology

These blue laser based DLP projectors use one micro-mirror-device engine (DLP chip).

Single chip DLP plus color wheel projectors generate the red, green and blue colored parts of a picture step by step, providing natural color representation.

  • Natural colors and good brightness uniformity
  • High brightness
  • Excellent white reproduction
  • Compact size

 

3-chip DLP projectors generate the three colored parts of a picture in parallel, generating improved color representation and brightness uniformity.

Laser Phosphor Technology based on 3-chip DLP Technology

3-chip DLP projectors generate the three colored parts of a picture in parallel, generating improved color representation and brightness uniformity.

  • Excellent colors and very good brightness uniformity
  • High brightness
  • DCI (Digital Cinema Initiative) compliant color space

 

RB laser projection a blue laser is used to create the blue color and a red laser is used to create the red color in the final image. The green color is generated by a green phosphor wheel emitting green light.

RB Laser Technology based on 3-chip DLP Technology

RB laser technology combines the advantages of brilliant color reproduction with cost efficiency. In RB laser projection a blue laser is used to create the blue color and a red laser is used to create the red color in the final image. The green color is generated by a green phosphor wheel emitting green light. Picture processing is realized with 3 chip DLP technology.

This technique allows very efficient light reproduction by avoiding optical filters resulting in more intense and more natural colors especially in the red color segment plus a higher brightness output.

  • Brilliant colors and brightness uniformity
  • Higher brightness
  • Lower power consumption
  • High light efficiency
  • Wider color space

 

Red, green and blue lasers are delivered directly to the 3 DLP image chips. The product of this technique creates a light pipe consisting of absolutely pure light that is split into the three RGB components.

RGB Laser Light Source with 3-chip DLP Technology

RGB laser uses the so-called ‘pure laser’ technology. Red, green and blue lasers are delivered directly to the 3 DLP image chips. The product of this technique creates a light pipe consisting of absolutely pure light that is split into the three RGB components. The light is emitted in very narrow RGB bands with very distinct spectral frequencies. This technology allows the creation of a large color space that easily exceeds even that of Adobe-RGB or DCI and can already cover the demanding Rec. 2020 color space.

  • Best colors and brightness uniformity
  • Highest brightness
  • Adobe-RGB, DCI compliant, Rec. 2020

 

Hybrid Light Source

A Hybrid Projector uses both laser and LEDs in a single platform. Sharp is not using this technology because of its limited color gamut and difficulties in reproducing accurate colors.

Comparison of non-beam expanded and beam-expanded coherent light output

Different Types of Laser Beams

Sharp only uses beam-expanded laser technology which spreads the light energy over a much larger area than a non-beam-expanded equivalent. This results in a far lower energy density than for example in a typical hand-held laser pointer, and therefore pose the same safety risks as a conventional lamp based projection system.

Sharp has developed their laser technology which strictly observes all safety guidelines comes with comprehensive procedures for proper installation, operation, and maintenance of the systems.

 

 

Left: Non-beam expanded coherent light output with high energy density. Right: Beam-expanded light output with a wider beam and lower energy density.