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114 results about "Green emission" patented technology

Micro-Emitter Array Based Full-Color Micro-Display

Disclosed is a semiconductor micro-emitter array for use in a full-color microdisplay. Each pixel includes three vertically-stacked red, green, and blue micro-emitters which minimizes pixel size. The microdisplay may be exclusively based on Group III-nitride semiconductors, with differing indium concentrations in three respective InGaN / GaN active regions for emitting the three RGB colors. Alternatively the microdisplay may be based on hybrid integration of InGaN based III-nitride semiconductors for blue and green emissions, and AlGaInP based (e.g., Group III-V) semiconductors for red emissions.
Owner:III N TECH

Micro-emitter array based full-color micro-display

Disclosed is a semiconductor micro-emitter array for use in a full-color microdisplay. Each pixel includes three vertically-stacked red, green, and blue micro-emitters which minimizes pixel size. The microdisplay may be exclusively based on Group III-nitride semiconductors, with differing indium concentrations in three respective InGaN / GaN active regions for emitting the three RGB colors. Alternatively the microdisplay may be based on hybrid integration of InGaN based III-nitride semiconductors for blue and green emissions, and AlGaInP based (e.g., Group III-V) semiconductors for red emissions.
Owner:III N TECH

Monolithic photovoltaic energy conversion device

A multijunction, monolithic, photovoltaic (PV) cell and device (600) is provided for converting radiant energy to photocurrent and photovoltage with improved efficiency. The PV cell includes an array of subcells (602), i.e., active p / n junctions, grown on a compliant substrate, where the compliant substrate accommodates greater flexibility in matching lattice constants to adjacent semiconductor material. The lattice matched semiconductor materials are selected with appropriate band-gaps to efficiently create photovoltage from a larger portion of the solar spectrum. Subcell strings (601, 603) from multiple PV cells are voltage matched to provide high output PV devices. A light emitting cell and device is also provided having monolithically grown red-yellow and green emission subcells and a mechanically stacked blue emission subcell.
Owner:ALLIANCE FOR SUSTAINABLE ENERGY

Organic light emitting diode display device

The OLED display device includes a first stack and a second stack that are separated from each other between an anode electrode and a cathode electrode, with a charge generation layer sandwiched between the first stack and the second stack, each of the first stack and the second stack having an emission layer. The first stack includes a blue emission layer formed between the anode electrode and the CGL. The second stack includes a fluorescent green emission layer and a phosphorescent red emission layer formed between the cathode electrode and the CGL. The blue emission layer includes one of a fluorescent blue emission layer and a phosphorescent blue emission layer.
Owner:LG DISPLAY CO LTD

Surface illuminator and liquid crystal display having the same

The invention relates to a surface illuminator and a liquid crystal display having the same and provides a surface illuminator capable of achieving high display quality by employing an array of discrete light sources and a liquid crystal display having the same. A reflective surface for reflecting light in a light guide region of a light guide extends from an end of a light entrance surface through which light enters the light guide region. An LED light source serving as an array of discrete light sources is constituted by a red emission LED, a green emission LED, a blue emission LED, and another green emission LED provided alternately and discretely along the light entrance surface. A red LED serving as an end light source provided at the end of the LED light source on the side of an end of a reflective surface is disposed such that about one half of an emitting region of the same is obscured by the reflective surface to prevent about one half of the quantity of light emitted from entering the light guide region.
Owner:SHARP KK

Organic Light Emitting Device

Disclosed is an organic light emitting device. The organic light emitting device includes a first emission unit configured to include a first red emission layer which emits red light, a first green emission layer which emits green light, and a first blue emission layer which emits blue light, a second emission unit configured to include a second red emission layer which emits red light, a second green emission layer which emits green light, and a second blue emission layer which emits blue light, a charge generation layer disposed between the first emission unit and the second emission unit, a first electrode formed as a reflective electrode, and configured to supply an electric charge having a first polarity to the first emission unit and the second emission unit, and a second electrode configured to supply an electric charge having a second polarity to the first and second emission units.
Owner:LG DISPLAY CO LTD

Organic light emitting device

Disclosed is an organic light emitting device. The organic light emitting device includes a first emission unit configured to include a common blue emission material layer which is included in common in a plurality of pixels emitting lights having different wavelength ranges, a second emission unit configured to include a red emission material layer, a green emission material layer, and a blue emission material layer which respectively emit lights having different wavelength ranges, a charge generation layer disposed between the first emission unit and the second emission unit, a first electrode formed as a reflective electrode, and configured to supply an electric charge having a first polarity to the first emission unit and the second emission unit, and a second electrode formed as a semi-transmissive electrode, and configured to supply an electric charge having a second polarity to the first emission unit and the second emission unit.
Owner:LG DISPLAY CO LTD

Organic light emitting device and method of preparing the same

Organic light emitting devices including an electron transport-emission layer, and methods of preparing the same are included. The electron transport-emission layer may be an electron transport-red emission layer, an electron transport-green emission layer or an electron transport-blue emission layer. The methods produce high yields of the organic light emitting devices and are less expensive than conventional methods.
Owner:SAMSUNG DISPLAY CO LTD

Organic electroluminescent white light device with multi-luminescent layer

This invention relates to an organic electro-white light device including a transparent chip, an anode layer, an organic cavity injection layer, an organic cavity transmission layer, an organic light emission layer, an organic cavity blocking layer, an electronic transmission layer and a cathode layer, in which, the organic light emission layer is a multi-layer structure composed of a blue emission layer, a green emission layer, a yellow and a red lamination layer, the blue layer emits fluorescent light and the other two emit phosphorescence, a matrix material of double transmission polarities is added between two phosphorescence layers to eliminate energy transfer between them and exchange positions of the two layers to increase the radiation effect and brightness of the devices.
Owner:JILIN UNIV

Organic light emitting display

There is provided an organic light emitting display capable of increasing an aperture ratio. The organic light emitting display includes red pixels including red emission regions, green pixels including green emission regions, and blue pixels including blue emission regions. In at least one of the red emission regions, the green emission regions, and the blue emission regions, a distance between an emission region and an adjacent emission region above the emission region is different from a distance between the emission region and another adjacent emission region below the emission region.
Owner:SAMSUNG DISPLAY CO LTD

Full color organic electroluminescence display device

Disclosed is a full color organic electroluminescence display device, comprising a substrate; a first electrode; organic film layers including red, green and blue emission layers and an electron transporting layer; and a second electrode. The thickness of the electron transporting layer, which is preferably formed as a common layer, is different in the red and green emission regions from that in the blue emission region so that the device has an excellent purity of color and improved luminous efficiency of red and green colors.
Owner:SAMSUNG DISPLAY CO LTD

Application of ALn(MoO4)2 up-conversion luminescent material doped with Er3+ and Yb3+ in optical temperature sensor

The invention relates to an application of an ALn(MoO4)2 up-conversion luminescent material doped with Er3+ and Yb3+ in an optical temperature sensor. The ALn(MoO4)2 up-conversion luminescent material doped with Er3+ and Yb3+ has a double-peak green up-conversion emission function. By adopting a fluorescence intensity ratio (FIR) technology and measuring the change of the intensity ratio of green emissions of the material at about 528nm and 550nm under the excitation of 980nm laser with temperature, high-sensitivity temperature detection can be achieved.
Owner:NORTHWEST UNIV(CN)

Organic light emitting device and method of fabricating the same

An organic light emitting device can include a first electrode and a second electrode, and a red emission layer, a green emission layer and a blue emission layer which are positioned between the first electrode and the second electrode. Each of the red emission layer, the green emission layer and the blue emission layer can be disposed in an entirety of a red sub-pixel area, a green sub-pixel area and a blue sub-pixel area. A distance between the first electrode and the second electrode in at least one of the red sub-pixel area, the green sub-pixel area and the blue sub-pixel area can be a first-order optical distance equal to λ / 2n, where λ is a wavelength of light emitted from each of the sub-pixel areas, and n is an average refractive index of a plurality of organic material layers disposed between the first electrode and the second electrode.
Owner:LG DISPLAY CO LTD

Organic light emitting device and method of fabricating the same

A light emitting device is discussed, and includes a first electrode; a hole transporting layer (HTL) on the first electrode; an organic light-emission layer (EML) having a red emission layer (EML) formed in a red sub pixel area Rp, a green emission layer formed in a green sub pixel area Gp, and a blue emission layer formed in a blue sub pixel area Bp; an electron transporting layer (ETL) on the red, green and blue emission layers; and a second electrode on the electron transporting layer, wherein the green emission layer includes a phosphor host material, a second phosphor host material, and a dopant material.
Owner:LG DISPLAY CO LTD

High-performance broadband OLED device

An OLED device having two spaced electrodes, and including a first light-emitting layer that produces green emission and includes an anthracene host and a 2,6-diaminoanthracene light-emitting dopant, and a second light-emitting layer that produces red emission and includes a host and a red light-emitting dopant.
Owner:GLOBAL OLED TECH

Organic light emitting display device

An organic light emitting display device with enhanced color purity according to viewing angle is disclosed. The organic light emitting display device includes a first electrode formed on a substrate and being a reflective electrode, a second electrode facing the first electrode and being a semi-transparent electrode, and red, green and blue emission layers formed between the first and second electrodes, wherein a maximum electroluminescent peak of each of the red, green and blue emission layers and a maximum photoluminescence peak of a host included in each emission layer satisfy Equations 1 to 3 below: wherein RED EL max is a maximum electroluminescent peak of the red emission layer, and RH PL max is a maximum photoluminescence peak of a red host included in the red emission layer, wherein GREEN EL max is a maximum electroluminescent peak of the green emission layer, and GH PL max is a maximum photoluminescence peak of a green host included in the green emission layer, and wherein BLUE EL max is a maximum electroluminescent peak of the blue emission layer, and BH PL max is a maximum photoluminescence peak of a blue host included in the blue emission layer.
Owner:LG DISPLAY CO LTD

Platinum (II) emitters for OLED applications

Described herein are novel platinum (II) emitters. These material show high emission quantum efficiency, low self-quenching constant and stable in thermal deposition process. The OLED fabricated from these materials can have pure green emission, high efficiency and low efficiency roll-off.
Owner:VERSITECH LTD

Organic light-emitting display apparatus

Provided is an organic light-emitting display apparatus, including a substrate, a first pixel electrode, a second pixel electrode, and a third pixel electrode, disposed on the substrate separated from one another, a red emission layer disposed corresponding to the first pixel electrode, a green emission layer disposed corresponding to the second pixel electrode, and a blue emission layer disposed corresponding to the third pixel electrode, an opposite electrode disposed over the red, green, and blue emission layers facing the first to third pixel electrodes, a first capping layer disposed on the opposite electrode corresponding to the first and second pixel electrodes, and a second capping layer disposed on the first capping layer corresponding to the first and second pixel electrodes and disposed on the opposite electrode to correspond to the third pixel electrode.
Owner:SAMSUNG DISPLAY CO LTD

White organic light-emitting display device

ActiveUS20160181563A1Improve red efficiencyImprovement in panel brightnessSolid-state devicesSemiconductor/solid-state device manufacturingColor shiftGamut
A white organic light-emitting display device includes a red emission layer between a charge generation layer and a yellow-green emission layer and having a hole transport-type host. The white organic light-emitting display device can improve brightness, color gamut, and color shift rate since the red emission layer functions as a hole transport layer and an electron blocking layer, as well as an emission layer. The white organic light-emitting display device can further improve the efficiency of the red emission layer by reducing exciton quenching between the charge generation layer and the red emission layer by the insertion of an auxiliary layer composed of a hole transport-type host between the charge generation layer and the red emission layer.
Owner:LG DISPLAY CO LTD

Red phosphor and preparation method thereof

The invention discloses a red phosphor and a preparation method thereof, the red phosphor has the chemical formula: M6Ln2-xEuxR2(PO4)6F2, wherein M is at least one of the alkaline earth metal ion group consisting of Ca2+, Sr2+ and Ba2+; Ln is rare earth metal ion selected from the group consisting of La3+, Gd3+ and Y3+; R is the alkaline earth metal ion selected from the group consisting of Na+ and K+; x is the coefficient of mole percent of doping element Eu in rare earth element Ln and is not less than 0.01 but not more than 0.90. Rare earth oxide, ammonium dihydrogen phosphate, alkaline (earth) metal carbonate and ammonium fluoride are mixed and then sintered in the atmosphere of CO at 950 DEG C or 1050 DEG C for 2 to 4 hours, and the product is obtained by grinding the sintered mixture. The resultant luminescent material can effectively absorb 147nm and 172nm vacuum ultraviolet lights, generate green emission with main emission peak at 618nm, and the emission intensity excited at 172nm is stronger than PDP red phosphor (Y, Gd) BO3:Eu3+(YGB). The resultant phosphor has the main emission at 618nm, which is better than chromaticity coordinate emitted at YGB 593nm. The resultant phosphor has high luminous intensity, high color purity and good chromaticity coordinate, and is suitable for serving as red light portion of the luminescent material for PDP and mercury-free fluorescent lamp.
Owner:SUN YAT SEN UNIV

Novel donor-acceptor fluorene scaffolds : a process and uses thereof

The present invention relates to novel donor-acceptor fluorene compounds, which can be used as for the fabrication of electroluminescent devices, and a process of preparing said novel compounds. More particularly, the present invention relates to amine donor and nitrile / ester acceptor fluorenes, fluorenones their pi-conjugated systems and related compounds, processes for preparing the said compounds including oxidation of fluorenes to corresponding fluorenones and their use in preparing organic electronic devices such as organic light emitting diodes (OLEDs), photovoltaic / solar cell, field effect transistors and other useful electroluminescent devices. The compounds are prepared by reacting 2H-pyran-2-ones in isolated or rigid conformations with cyclic ketones containing methylene carbonyl moiety in the presence of a base in- an organic solvent. The present invention also relates to a new concept and approach to overcome the problem of 'Green emission defect' in 9-unsubstituted fluorene-based organic light emitting diodes which occurrs due to the conversion of fluorenes to fluorenones that show emission mainly in green-yellow region. In the present invention we have placed donor-acceptor substituents in such a way that donor-acceptor fluorenones show emission in the blue region (instead of green-yellow region) thus improving the blue colour purity and overcoming the problem of green emission defect.
Owner:COUNCIL OF SCI & IND RES

Organic light emitting diode display

An OLED display for improving white light emitting efficiency and simplifying a manufacturing process includes a plurality of pixels, each of the pixels having a transistor unit, a color filter unit and an organic light emitting device unit. The transistor unit converts signals from the outside into driving signals for driving an organic light emitting device unit. The organic light emitting device unit is composed of blue, red and green emission layers each having different areas. By passing white light through a color filer, the OLED display can realize full color.
Owner:SAMSUNG DISPLAY CO LTD

Green organic luminophor

The invention is an innovative, economical chemical compound 1-phenyl-5-(p-methoxyphenyl)-3-[1,8-naphthoylene-1',2'-benzimidazol-4-yl]-2-pyrazol of the general formula 1: The compound is an efficient organic luminophor of green emission (lambdmax.lum>>510 nm) characterized by high quantum yield of photoluminescence: eta=0.85 in toluene solution and eta=0.78 in solid state (vacuum-deposited film) and large Stokes shift (FIGS. 1 and 2). The luminophor has increased solubility in organic solvents; its luminescence is increased over that of the prior art in, including, but not limited to, powder form, films and in solutions; and in exhibits increased photochemical and chemical stability.
Owner:EMAGIN CORP

La2Hf2O7 system inorganic luminous material and preparation method thereof

ActiveCN107903897ARealize anti-counterfeitingIncreased upconversion fluorescence intensityStampsLuminescent paintsCross relaxationRare earth ions
The invention provides a La2Hf2O7 system inorganic luminous material. The molecular formula of the inorganic luminous material is Yb / Eu / Er: La2Hf2O7, and by mole percent, the doping amount of Yb is 10-30%, the doping amount of Eu is 1-10%, and the doping amount of Er is 0.001-0.01%; and under the condition that the inorganic luminous material is excited by 980 nm, upconversion green emission of Er3+ ions can be obtained, and under the condition that the inorganic luminous material is excited by xenon lamps with the light of 298 nm, 365 nm and 415 nm, down-conversion red emission of Eu3+ is obtained. By the system, upconversion green emission and down-conversion red emission can be realized simultaneously by the system, emission peaks source from different rare earth ions, and have different spectral shapes, various rare earth ions are simply mixed in some common matrix systems, due to large non-radiative cross relaxation probability of the rare earth ions, upconversion light emitting and down-conversion light emitting are difficultly realized simultaneously, and therefore, the system can be applied to anti-counterfeit label materials.
Owner:佛山市丰源新材料科技有限公司
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