1914results about How to "Improve luminous performance" patented technology

The invention discloses an organic electroluminescent display (OLED), a manufacturing method of the organic electroluminescent display (OLED) and a display device. A pixel defining layer arranged in the organic electroluminescent display (OLED) is provided with opening areas corresponding to pixel areas of the OLED, an opening of each opening area is larger than the bottom face of the opening area, and thus the problem that a cathode may break later can be avoided; because the upper surface of the pixel defining layer is made from lyophobic material, and luminescent material with which the pixel defining layer is coated later cannot remain on the upper surface of the pixel defining layer easily, the problem that colors of the adjacent pixel areas are mixed can be avoided; meanwhile, the inclined faces of the corresponding opening areas of the pixel defining layer are made from lyophilic material so that it can be guaranteed that the opening areas are evenly filled with the luminescent material with which the pixel defining layer is coated later. Therefore, according to the OLED, the uniformity of a film layer formed later on the pixel defining layer can be guaranteed, and the luminescence property of the OLED is improved.

Provided is a phosphor material for a white LED with a blue LED or ultraviolet LED as a light source.A phosphor comprises an α-sialon represented by the formula: (M1)X(M2)Y(Si)12−(m+n)(Al)m+n(O)n(N)16−n where M1 is at least one element selected from the group consisting of Li, Mg, Ca, Y and lanthanide metals (except for La and Ce), M2 is at least one element selected from Ce, Pr, Eu, Tb, Yb and Er, 0.3≦X+Y≦1.5, 0<Y≦0.7, 0.6≦m≦3.0, 0≦n≦1.5 and X+Y=m / 2; and the oxygen content in a powder of the α-sialon is at most 0.4 mass % larger than a value calculated based on the formula.

An LED bulb lamp comprises a lamp shell, a lamp head connected with the lamp shell, a core column, conductive supports, LED filaments and cantilever arms, wherein the core column comprises a core column bottom and a core column top which are opposite to each other, the core column bottom is connected with the lamp head, and the conductive supports are connected with the core column top. Each LED filament comprises a filament body and filament electrodes, wherein the filament electrodes are located at the two opposite ends of the filament body, the two filament electrodes are connected with the two conductive supports, the core column is surrounded by the filament bodies, one end of each cantilever arm is connected with the core column, and the other end of each cantilever arm is connected with the corresponding filament body. In the height direction, the distance from the bottom of the lamp shell to the top end of the lamp shell is H, a first height difference ranging from 0 to 1 / 10H exists between every two corresponding filament electrodes, each filament body is bent up and down and has a highest point and a lowest point, a second height difference exists between the highest point and the lowest point, the first height difference is smaller than the second height difference, and the second height difference ranges from 2 / 10H to 4 / 10H. The LED bulb lamp is good in glowing effect, easy to make and large in light emergent angle.

A phosphor including a main production phase of a phosphor expressed by a composition formula of MmAaBbOoNn:Zz (where an element M is one or more bivalent elements, an element A is one or more trivalent elements, an element B is one or more tetravalent elements, O is oxygen, N is nitrogen, an element Z is an activator, n=2 / 3m+a+4 / 3b−2 / 3o, m / (a+b)≧1 / 2, (o+n) / (a+b)>4 / 3, wherein m=a=b=1 and o and n is not 0). A phosphor including 24 wt % to 30 wt % of Ca (calcium), 17 wt % to 21 wt % of Al (aluminum), 18 wt % to 22 wt % of Si (silicon), 1 wt % to 15 wt % of oxygen, 15 wt % to 33 wt % of nitrogen and 0.01 wt % to 10 wt % of Eu (europium), wherein an emission maximum in an emission spectrum is in a range of 600 nm to 660 nm; and wherein color chromaticity x of light emission is in a range of 0.5 to 0.7, and color chromaticity y of the light emission is in a range of 0.3 to 0.5.

The invention discloses a high-performance quantum dot-polymer fluorescent nano composite material and a preparation method thereof. The high-performance quantum dot-polymer fluorescent nano composite material comprises polymer and quantum dot which has fluorescent property and is hybridized by silicon dioxide. The method comprises the following steps of: firstly, dissolving 1g of polymer by using a solvent or heating 1g of polymer into a molten state, then adding 0.0002-0.08g of quantum dot which has the particle diameter of 5-30 nanometers, is not modified or is modified by using silane coupling agent and is hybridized by the silicon dioxide and removing the solvent or cooling naturally after stirring for 2min-24hr to obtain the quantum dot-polymer nano composite material. The nano composite material has very strong photoinduced fluorescent property, and the mechanical property of the nano composite material is also enhanced greatly in comparison with that of a corresponding straight polymer. The high-performance quantum dot-polymer fluorescent nano composite material has simple preparation and is suitable for mass production. The invention has very good application prospect in the aspects of preparing an optical device and an optical material, replacing a traditional polymer material and the like.

Luminescent polymers are prepared from thermosetting unsaturated polyesters, suspending fillers and phosphorescent pigments and utilized to make gel coated articles and molded, cast and fiberglass reinforced plastic (FRP) articles. The luminescent polymers show bright and long-lasting photoluminescent afterglow, strong thermostimulation of afterglow by heat and electroluminescent properties. The preferred thermosetting unsaturated polyester resins are prepared by condensing mixtures of ethylenically unsaturated and aromatic dicarboxylic acids and anhydrides with dihydric alcohols and a polymerizable vinylidene monomer. Preferred suspending fillers and thixotropic modifiers include silica, microspheres, glass fibers and other short fibers, nepheline syenite, feldspar, mica, pumice, magnesium sulfate, calcium carbonate, bentonite and the various clays and thixotropic modifiers and mixtures thereof. Preferred phosphorescent pigments include alkaline earth aluminate phosphors, zinc sulfide phosphors and mixtures of these phosphors.

An n-cap layer is formed on a top surface of p-type clad layers, the p-type clad layer is a top layer of a stacked structure having a pn-junction for emitting carriers into light-emitting region of a GaN based light-emitting device, thus increasing the activation ratio of acceptor impurities in the p-type clad layers. The n-cap layer is used also as a current blocking layer, thereby constructing a current-blocked structure. The n-cap layer should preferably be made of InuAlvGa1-u-vN (0<u, v<1) deposited as thick as 1.0 micron or more. The present invention will easily provide a high luminous efficiency GaN based semiconductor light-emitting device without using any complicated processes such as electron-beam irradiation or thermal annealing.

The invention discloses a fluorescent carbon quantum dot, its light-emitting polymer based composite material and a preparation method thereof. More specifically, the invention provides a method for preparation of the fluorescent carbon quantum dot and its light-emitting polymer based composite material by taking a small molecule compound as a carbon source and an organosilicone monomer as a catalyst and stabilizer. By means of the combined action of the polymerizable organosilicone monomer and the small molecule carbon source, the carbon quantum dot can be formed in one step. Without purification, the reaction product only needs solvent removal to undergo further reaction so as to form a carbon quantum dot-organosilicone resin composite material. The organosilicone monomer involved in the invention can promote formation of the carbon quantum dot, and can play a role of stabilizing the carbon quantum dot, and also can be used as a polymer matrix monomer. Therefore, the obtained carbon quantum dot has stable luminescent properties, is well compatible with the polymer matrix and keeps the original luminescent properties. The method disclosed in the invention has a simple process and is easy to implement, and can be widely applied in the fields of solar cells and LED devices.

A light emitting device, which can be efficiently manufactured and maintain a stable light emitting property for a long period, is provided. The light emitting device comprises a first resin forming body including a periphery that forms a recess to house a light emitting element and a bottom that forms a bottom portion of the recess, and a second resin forming body which covers the light emitting element. The first resin forming body is composed of a thermosetting epoxy resin composite whose essential component is an epoxy resin. The bottom covers surfaces of lead frames excluding mounting regions of the light emitting element and wires. A thickness of the bottom is formed thinner than a thickness from the surface of the lead frames to a leading end of the light emitting element.

A light emitting device is provided. The light emitting device includes a light emitting element that emits ultraviolet light or short-wavelength visible light; and at least one phosphor that is excited by the ultraviolet light or short-wavelength visible light to emit visible light. The at least one phosphor includes a first phosphor including a composition represented by the formula: M1O2.aM2O.bM3X2:M4, where M1 is at least one element selected from the group consisting of Si, Ge, Ti, Zr, and Sn; M2 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M3 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; X is at least one halogen element; M4 is at least one element essentially including Eu2+ selected from the group consisting of rare-earth elements and Mn; a is in the range of 0.1≦a≦1.3; and b is in the range of 0.1≦b≦0.25.

Organic light-emitting elements each have the following structure: a transparent anode, a functional layer including a charge injection layer and an organic light-emitting layer, and a transparent cathode are layered on a substrate in the stated order; a bank defines a formation area of the organic light-emitting layer; the charge injection layer is a metal oxide layer formed by oxidizing an upper surface portion of the anode composed of the metal layer, and a portion of the charge injection layer that is positioned under the area is depressed so as to form a recess; and the upper peripheral edge of the recess is covered with a covering portion of the bank.

A method for producing a gallium nitride based compound semiconductor light emitting device which is excellent in terms of the light emitting properties and the light emission efficiency and a lamp is provided. In such a method for producing a gallium nitride based compound semiconductor light emitting device, which is a method for producing a GaN based semiconductor light emitting device having at least a buffer layer, an n-type semiconductor layer, a light emitting layer, and a p-type semiconductor layer on a translucent substrate, on which an uneven pattern composed of a convex shape and a concave shape is formed, the buffer layer is formed by a sputtering method conducted in an apparatus having a pivoted magnetron magnetic circuit and the buffer layer contains AlN, ZnO, Mg, or Hf.

The invention provides a backlight module which comprises a light source, a light guide plate and reflective sheets, wherein the reflective sheets comprise a first reflective sheet and a second reflective sheet; the first reflective sheet is arranged on the lateral surface of the light guide plate; the second reflective sheet is arranged at the bottom of the light guide plate; the light source is arranged below the first reflective sheet; the first reflective sheet is used for reflecting light emitted by the light source into the light guide plate; and after being scattered by the light guide plate and reflected by the second reflective sheet, the light is emitted out from the top of the light guide plate. Correspondingly, the invention provides a display device which comprises the backlight module. The backlight module provided by the invention has the advantages of thinning, increase of an effective lighting area, shape diversification and the like.