Dispersed crystallite up-conversion displays
AssigneeUniversity of Central Florida
InventorsMichael Bass, Alexandra Rapaport, Hans Jennsen
Life of this patent
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Abstract
A two and three dimensional display 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 display medium is also used with a preferred component layout with experimentation test data, along with applications for full color, high brightness, high resolution, displays.
Claims32
A method of displaying color images from a display medium, comprising the steps of:
- generating a first light beam;
- absorbing a portion of the first light beam in a display medium of a transparent polymer plastic containing particles doped with rare earth ions, the particles having sizes between approximately 1 to approximately 100 microns;
- and
- emitting visible color light from the display medium.
A display medium, comprising:
- a transparent polymer plastic;
- and
- particles dispersed in the plastic for up-converting infrared light to visible light, the particles having sizes between approximately 1 to approximately 100 microns, wherein the particles in the plastic are used to form visible displays.
A method of displaying color images from a display medium, comprising the steps of:
- dispersing particles in a plastic host medium;
- generating an infrared light beam into the host medium;
- absorbing a portion of the infrared light beam in the dispersed particles;
- upconverting a portion of the infrared light beam into visible colored light;
- and
- emitting blue visible colored light with fluoride crystal host, NaYF4 particles co-doped with Tm3− ions at approximately 480 nm.
A method of displaying color images from a display medium, comprising the steps of:
- dispersing particles in a plastic host medium;
- generating an infrared light beam into the host medium;
- absorbing a portion of the infrared light beam in the dispersed particles;
- upconverting a portion of the infrared light beam into visible colored light;
- and
- emitting green visible colored light with fluoride crystal host, NaYF4 particles co-doped with ions chosen from one of Ho3+ or Er3+ ions, at approximately 550 nm.
A method of displaying color images from a display medium, comprising the steps of:
- dispersing particles in a plastic host medium;
- generating an infrared light beam into the host medium;
- absorbing a portion of the infrared light beam in the dispersed particles;
- upconverting a portion of the infrared light beam into visible colored light;
- and
- emitting red visible colored light with fluoride crystal host, NaYF4 paraticles co-doped with Er3+ ions at approximately 660 nm.
A method of displaying color images from a display medium, comprising the steps of:
- generating a first light beam;
- absorbing a portion of the first light beam in a display medium of a transparent polymer plastic of phosphorylated polymethylmethacrylate(p-PPMA) containing particloes doped with rare earth ions;
- and
- emitting visible color light from the display medium.
A method of displaying color images from a display medium, comprising the steps of:
- generating a first light beam;
- absorbing a portion of the first light beam in a display medium of a transparent polymer plastic containing particles doped with rare earth ions, wherein each of the particles include rare earth ions co-doped with Yb3+ in fluoride and orthophosphate crystalline hosts;
- and
- emitting visible color light from the display medium.
A display medium, comprising:
- a transparent polymer plastic of phosphorylated polymethylmethacrylate(p-PPMA);
- and
- means dispersed in the plastic for up-converting infrared light to visible light, wherein the dispersed means in the plastic is used to form visible displays.
A display medium, comprising:
- a transparent polymer plastic;
- and
- particles in the plastic for up-converting infrared light to visible light, the particles including rare earth ions co-doped with Yb3− in fluoride and orthophosphate crystalline hosts, wherein the particles in the plastic are used to form visible displays.
Dependencies are inferred from the claim text.