Experience with color calibration between lamps and lasers, and their matching.

[Harold Hallikainen]

Yes, but that adjustable primary would apply to the whole image, right?

[Marcel Birgelen]

Yes and no... If you sync it to the DMDs, you could create extra pure primaries per pixel, much like a single DMD projector creates RGB via pulsing the colors in the light source or putting a color wheel in between.

You could also go wild in another direction, by replacing the current prism with a somewhat more sophisticated color filtering system...

• Idea: Modify the white light source to include a fourth primary before it’s split into RGB.
• How it would work:
  1. Replace the white light source with four laser diodes (e.g., red, green, blue, and deep red or cyan).
  2. Use dichroic mirrors to combine the four diode outputs into a single "white" beam.
  3. Split this beam into three spectral bands (not pure RGB) using dichroic filters, each containing a mix of the original four primaries.
     • For example:
       • Band 1: Red + deep red
       • Band 2: Green + cyan
       • Band 3: Blue
  4. Direct each band to its own DMD chip. The DMDs modulate the mixed bands, and the beams are recombined for projection.
• Cons:
  • The DMDs are no longer modulating pure RGB, but mixed spectral bands. This requires careful calibration to ensure the final image matches the intended colors.
  • The gamut is widened, but the system will become increasingly complex.

[Stefan Orlandic]

Hello to everyone.
I have been in and out of hospital for almost a month and that prevented me to come here earlier.
I will try to reply in the next week or two to some of the questions as soon as I finish all medical things.
Sorry for a delay.

[Christos Gartaganis]

Stefan, we all wish you a swift recovery and eagerly anticipate your insights and feedback on everything that was discussed here during your absence.