Ifire Technology Corp.

Ifire IP Corporation

Dan Daeweon Cheong

Xingwei Wu

Abdul M Nakua

James Alexander Robert Stiles

Vincent Joseph Alfred Pugliese

John Wesley Moore

Maizhi Yang

M Abdul Nakua

Terry Hunt

Stephen Charles Cool

Paul Barry Del Bel Belluz

David Irvine

Yong-seon Lee

M Nakua Abdul

The present invention is a method for gettering undesirable atomic species from a vaporizing atmosphere during deposition of multi-element thin film phosphor compositions. The method comprises vaporizing one or more getter species immediately prior and/or simultaneously during the deposition of a phosphor film composition within a deposition chamber. The method improves the luminance and emission spectrum of phosphor materials used for full colour ac electroluminescent displays employing thick film dielectric layers with a high dielectric constant.

Method for gettering oxygen and water during vacuum deposition of sulfide films

An improved color-converting photoluminescent film that provides visible light emission in the red to green portion of the visible spectrum when excited by blue light. The color-converted photoluminescent film of the invention is patternable and has improved luminous efficiency and stability and is suitable for use in electroluminescent displays. The film comprises a mixture of a clear UV curable resin and photo-initiator which does not absorb blue light; and fluorescent pigment particles, wherein a molecular additive is optionally provided in to either or both of the pigment particles and curable resin. The mixture is screen printed onto a substrate to form a film and UV cured.

Color-converting photoluminescent film

A pixel sub-structure for an electroluminescent display and a method for making the same. The sub-structure comprising: a color conversion layer; and an optical enhancement layer; wherein at least a portion of the color conversion layer is integrated with at least a portion of the optical enhancement layer.

Color conversion and optical enhancement layers for electroluminescent displays

A thin film phosphor for an electroluminescent device, the phosphor being selected from the group consisting of thiasluminates, thiogallates and thioindates having at least one cation selected from elements of Groups IIA and IIB of the Periodic Table of Elements. The phosphor being activated by a rare earth metal and containing a Group IIIB element as a partial substitute for a portion of aluminum, gallium or indium of the thiogallate, thioindate and thioaluminate. The phosphor provides improved luminance. An electroluminescent device consisting of the thin film phosphor on a substrate is also described.

Yttrium substituted barium thioaluminate phosphor materials

A phosphor and a method of deposition. The phosphor comprises a composition of the formula M'BaM&#x2033;M&#x2032;&#x2033;; RE, where M&#x2032; is at least one element selected from magnesium and calcium, M&#x2033; is at least one element selected from aluminum, gallium and indium, M&#x2032;&#x2033; is at least one element selected from sulphur, selenium and tellurium, RE is at least one rare earth element, especially europium or cerium, and 0&#x3c;a&#x3c;1. Deposition is preferably by dual source electron beam deposition. The phosphor may be annealed. The phosphor provides a high luminosity blue emission that does not require an optical filter to achieve acceptable color coordinates for the blue sub-pixel element for a full color thin film or thick film electroluminescent display. The blue sub-pixel pixel performance meets the luminosity and color temperature specifications for current generation cathode ray tube displays.

Magnesium barium thioaluminate and related phosphor materials

A thin film phosphor for an electroluminescent device, the phosphor being a compound of the formula Mg Ca Al S :M, where the value of x is in the range <x< and M is a rare earth activator. A method for the preparation of the phosphor on a substrate is also disclosed.

Magnesium calcium thioaluminate phosphor

A thin film phosphor for an electroluminescent device, in which the phosphor is selected from the group consisting of thioaluminates, thiogallates and thioindates having at least one cation selected from elements of Groups IIA and IIB of the Periodic Table of Elements. The phosphor is activated by a rare earth metal and co-activated with gadolinium. The phosphor provides improved luminance. An electroluminescent device comprising the thin film phosphor on a substrate is also described. Further aspects provide an electroluminescent device in which the thin film phosphor is adjacent to a thin film of zinc sulphide, preferably sandwiched between thin films of zinc sulphide.

Thioaluminate phosphor material with a gadolinium co-activator

A method for the deposition of a thin film of a pre-determined composition e.g. a phosphor, onto a substrate, in which the composition is a ternary, quaternary or higher composition, especially a composition selected from the group consisting of thioaluminates, thiogallates and thioindates of at least one element from Groups IIA and IIB of the Periodic Table. In the embodiment, the method comprises placing a pellet of at least one sulfide on a first source and placing a pellet of at least one sulfide on a second source, with one pellet containing dopant. Vapor deposition onto the substrate is effected with separate electron beams. The rate of vaporizing of the sulfides is monitored with separate shielded coating rate monitors. The temperature of the sources is controlled to obtain the composition on the substrate. The method is particularly used for deposition of ternary or quaternary phosphors on substantially opaque substrates in electroluminescent devices.

Growing community of inventors

North York, Canada

Dan Daeweon Cheong