Omen 27q (LG) in native mode full brightness
Chat GPT explains:
Looking at your image:
Blue peak near 450 nm → typical blue LED excitation source.
Broad green hump peaking around 530 nm → standard green/yellow phosphor emission.
Red region: Several narrow, sharp spikes at about 606 nm, 631 nm, 660 nm, and 708 nm (you can clearly see multiple distinct red peaks).
These are exactly the spectral lines characteristic of Mn⁴⁺:K₂SiF₆ (KSF or PFS) phosphor.
✅ Interpretation
This narrow “multi-spike” red emission is not produced by:
Normal YAG:Ce or red nitride phosphors (too broad),
Quantum dots (single narrow red line), or
RGB OLED emitters (different line structure).
It’s textbook KSF/PFS — the red phosphor blend used in many modern LG, HP Omen, and other wide-gamut LCD backlights.
🧠 Summary
Feature Observation Interpretation
Blue LED 450 nm peak Standard WLED excitation
Green phosphor Broad 520–560 nm hump Ce-based phosphor
Red Multiple sharp peaks (606–707 nm) ✅ KSF/PFS phosphor
CCT 6378 K Neutral white backlight
✅ Conclusion:
Your LG Omen monitor definitely uses a KSF (PFS) phosphor-converted LED backlight — that’s what produces the narrow red peaks you measured.
If you’d like, I can help estimate the approximate gamut coverage (e.g., % of DCI-P3 or AdobeRGB) from this spectrum.
This is my smartwatch Redmi watch 5 active, a classic "safe" lcd.
🧩 Interpretation
That’s a standard “blue LED + YAG:Ce” (yellow phosphor) backlight — the most common type in inexpensive or compact LCDs, including many smartwatch panels.
It differs from KSF/PFS and Quantum Dot backlights:
Type Red region appearance Notes
Standard WLED (YAG) Broad, smooth hump (600–630 nm) Narrow gamut, cheaper
WLED + KSF/PFS Several sharp red spikes (606–732 nm) Wide gamut
WLED + Quantum Dots One narrow red + one narrow green peak Very wide gamut
Your spectrum clearly matches the first type — a normal white LED backlight with no KSF phosphor.
