University of Cincinnati

Quarkstar LLC

Dow Corning Corporation

Andrew Jules Steckl

Jason C Heikenfeld

Steven C Allen

Daewoo Han

James D Scofield

Michael J Garter

Liang-Chiun Chao

Ronald H Birkhahn

Chong Yuan

Mark Jon Loboda

John D Rudolph

Giovanni M Pauletti

Dong-Seon Lee

Yongqiang Wang

Ming Pan

Hua Li

Robert Chih-Jen Chi

Ji-Ping Li

A light emitting device includes a light emitting diode (LED); a transparent optic having a refractive index n; and a phosphor layer spaced apart from the LED and positioned between the LED and the transparent optic. The phosphor layer has an effective refractive index n, where a gap between the LED and the phosphor layer has a refractive index nthat is less than n. The transparent optic has an inner convex surface in contact with the phosphor layer. The inner convex surface has an inner radius of curvature r; and an outer convex surface facing away from the phosphor layer and being a surface through which the light emitting device emits light into a medium adjacent the outer convex surface. The medium has a refractive index n. The outer convex surface has an outer radius of curvature R, such that r/R is equal to n/n.

Nearly index-matched luminescent glass-phosphor composites for photonic applications

A device () and method for analyzing blood coagulation in a blood sample. The device () includes a housing () having an analytical membrane () partially enclosed in a housing. The analytical membrane () includes a porous hydrophilic sample portion (), a porous hydrophilic analytical portion (), and a porous hydrophilic wicking portion (). The porosity of the analytical portion () differs from the porosity of the sample portion (). The method utilizes the device to analyze blood coagulation in a whole blood sample from the distance travelled by the red blood cell leading edge () in a predetermined period of time.

Devices and methods for analyzing a blood coagulation property

Methods for electrospinning a hydrophobic coaxial fiber into a superhydrophobic coaxial fiber mat can include providing an electrospinning coaxial nozzle comprising a core outlet coaxial with a sheath outlet, ejecting an electrospinnable core solution from the core outlet of the electrospinning coaxial nozzle, ejecting a hydrophobic sheath solution from the sheath outlet of the electrospinning coaxial nozzle, wherein the hydrophobic sheath solution annularly surrounds the core solution, applying a voltage between the electrospinning coaxial nozzle and a collection plate, wherein the voltage induces a jet of the electrospinnable core solution annularly surrounded by the hydrophobic sheath solution to travel from the electrospinning coaxial nozzle to the collection plate to form the hydrophobic coaxial fiber comprising an electrospinnable polymer core coated with a hydrophobic sheath material, and wherein collection of the hydrophobic coaxial fiber on the collection plate yields the superhydrophobic coaxial fiber mat.

Methods for electrospinning hydrophobic coaxial fibers into superhydrophobic and oleophobic coaxial fiber mats

Light emitting device including nearly index-matched luminescent glass-phosphor composites

Light emitting device having a specific dimension of phosphor layer

A light emitting device is described. The light emitting device includes a base; a light emitting diode supported by the base; a first layer spaced apart from the light emitting diode and including a light emitting material, the first layer having a refractive index n; a transparent optic having a refractive index nthat is greater than or equal to n, the transparent optic having a convex surface facing away from the light emitting diode and the first layer being positioned between the transparent optic and the light emitting diode. A gap between the light emitting diode and the first layer has a refractive index nthat is less than n, and the convex surface has a radius of curvature sufficiently large relative to a dimension of the first layer to eliminate total internal reflection of light entering the transparent optic from the first layer.

Light emitting device

A light emitting device includes a base; a light emitting diode (LED) supported by the base; a layer spaced apart from the LED and including a light emitting material of refraction index n. An enclosure formed by the layer and the base encloses the LED. A medium inside the enclosure between the LED and the layer has a refraction index n&#x3c;n; and an optic in contact with the layer and having a refraction index n&#x2267;n. The layer is positioned between the optic and the LED. The optic has, at a surface of contact with the layer, a radius r measured along a ray originating from the LED, and, at an output surface of the optic, another radius R measured along the same ray, such that R&#x2267;r&#xb7;(n/n), where nis a refraction index of a medium adjacent the output surface of the optic.

Electronic devices () utilizing electrically-controlled liquid components to accomplish device switching. Electric fields are used in a device structure to manipulate the position and/or geometrical shape of a conductive fluid or liquid () using electrowetting. This manipulation regulates the flow of current between electrodes of the device structure, such as the source and drain regions () of a transistor construction, by bridging a non-conductive channel () separating the electrodes () so that the electrodes () are electrically coupled.

Liquid logic structures for electronic device applications

The invention relates to light transmissive, transflective, or reflective flat panel display devices and, more specifically, to light emissive flat panel displays constructed from high performance electrowetting light valve (ELV) devices (-). An array of ELV devices (-) is mounted on or adjacent to a backlight (), employing a reflector () allowing for improved transmission. The backlight () may be partially diffusely reflective or translucent as to also allow for creation of a transflective display panel.

Display capable electrowetting light valve

A signage device comprising one or more light sources, a waveguide or arrangement of waveguides and photoluminescent features coupled thereto. In one embodiment, a waveguide is adapted to receive light of a first wavelength and the photoluminescent features are adapted to emit light of a second wavelength in response to receiving light of the first wavelength.

Light emissive signage devices based on lightwave coupling

A light emissive display having a specular waveguide that propagates short wavelength light and photoluminescent features adjacent to the waveguide that fluoresce, for example, in visible red, green, blue, and mixed colors when selectively coupled with the short wavelength light. The photoluminescent layers emit light primarily and, therefore, efficiently in the direction of an observer only. This light emissive display may be utilized as a planar light source, as patterned information signage, or as a re-configurable information display containing intensity modulated pixels. The light emissive display may be enhanced optically such that only a small portion of ambient light is reflected from the display while preserving the majority of emitted display luminance.

Light emissive display based on lightwave coupling

Light-emitting devices having a semiconductor phosphor layer formed by metalorganic chemical vapor deposition (MOCVD). The semiconductor phosphor layer may be any Group III nitride semiconductor compound that is in-situ doped during MOCVD deposition with one or more dopants effective to act as luminescent centers. The MOCVD deposition conditions required for the formation of these extrinsic luminescent films differ significantly from the MOCVD deposition conditions utilized to deposit intrinsic GaN luminescent films.

Method of forming a semiconductor phosphor layer by metalorganic chemical vapor deposition for use in light-emitting devices

The DTF optical memory makes use of the property of dielectric thin film interference to create multi-color pixels and serve as a multi-level optical memory device. The fabrication of the device comprises a dielectric thin film deposited on a substrate that is micro-milled utilizing focused ion beam (FIB) technology. Such micro-milling creates pixels of varying depth that when exposed to a broad-band light source create distinct colors caused by the properties of thin film interference and superposition of reflected light from the broad band source, thus creating an effective optical memory device that may be detected using a color CCD camera or a photo-detector array. Accurate creation and detection of discrete colors allows accurate digital encoding and direct storage of color image in a format of sub-micron pixel array. The robustness of the DTF optical memory device allows operation under harsh environmental conditions, including high temperatures and radiation.

Dielectric thin-film color optical memory device and fabrication process

An electroluminescent device in which the intensity of the light emission is enhanced by photopumping with radiation from a radiation source of a suitable photon energy. The photopumping radiation from the radiation source interacts with the wide band-gap semiconductor forming the electroluminescent device so as to, when the device is electrically biased to provide light emission, generate additional carriers that enhance the intensity of the light emission from a light-emitting element present in the wide band-gap semiconductor. A waveguide structure may be integrated into a substrate carrying the electroluminescent device for transferring the radiation from the radiation source to the electroluminescent device. Multiple electroluminescent devices may be arranged in pixels for forming a flat panel display in which certain of the devices are photopumped with radiation.

Growing community of inventors

Cincinnati, OH, United States of America

Andrew Jules Steckl