Optically written displays based on up-conversion of near infrared light

Alexandra Rapaport, Ferenc Szipocs, Janet Milliez, Hans Jenssen, Michael Bass, Katherine Schafer, Kevin Belfield

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


A new type of display is reported based on up conversion of near infrared light to the visible. The display medium is a transparent polymer containing particles of crystals doped with Yb3+ and other rare earth ions. The Yb3+ ions absorb light from a commercially available diode laser emitting near 975 nm and transfer that energy to the other dopant ions. Using a fluoride crystal host, NaYF4, co-doped with Tm3+ ions we obtain blue light at ∼480 nm, with Ho3+ or Er3+ ions we obtain green light at ∼550 nm and with Er3+ we obtain red light at ∼660 nm. The mechanisms that enable such display media are explained, a demonstration of a prototype display is shown, and concepts for full color, high brightness, high resolution, displays are presented.

Original languageEnglish (US)
Pages (from-to)111-114
Number of pages4
JournalSID Conference Record of the International Display Research Conference
StatePublished - 2000
Externally publishedYes
Event20th International Display Research Conference - Palm Beach, FL, United States
Duration: Sep 25 2000Sep 28 2000

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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