54results about How to "Reduce light attenuation" patented technology

The present invention discloses a high CRI white LED and a lamp comprising the white LED. The white LED includes a base, a reflector for mixing light, protrusions on the inner wall surface of the reflector, at least 6 LED chips emitting lights at different wavelengths, which are fixed and electrically combined on the heat conducting base, and a lead frame which has a shape and a size matched well with the bottom of the reflector and which is fixed outside the reflector and on the top surface of the base. Electrodes of the LED chips are electrically connected with leads on the lead frame. A transparent optical material covers the chips. The multi-wavelengths lights are mixed uniformly by diffuse reflection of the reflecting walls of the reflector to achieve a white LED with high CRI and high efficiency. A white LED lamp or a white LED plane light source comprising the white LED can avoid energy loss in optical conversion in which phosphors are used. With the configuration, the efficiency in electro-to-optic conversion and working lifetime of the lamps are improved. The lamp is also suitable for mass production.

An inter-layer insulating film and a gate insulating film which are positioned on the optical path of light from an organic EL element to be externally emitted, for example, located under a transparent electrode, are removed. Because SiO₂ films having a refractive index which differs significantly from refractive indexes of other films are used for these films, there was a problem of light attenuation in these layers. Such light attenuation can be reduced by removing these layers located in the region through which light from the organic EL element passes.

In a device of the invention for transmitting modulated optical signals between a first unit and a second unit, the first unit is supported to be rotatable relative to the second unit. The device comprises a light guide along a circular track on the first unit, a first light coupler for coupling light into or out of the light guide, and a second light coupler for coupling light into or out of the light guide and disposed on the second unit and movable relative to the means for guiding light. For an achievement of a high quality of transmission, a regulating means for the position of the coupling elements relative to the light guide, or a hydrodynamic bearing means is provided. An optical light-guiding fiber of the invention for conveying optical signals from an optical transmitter to an optical receiver has a light exit face and means for deflecting light emerging from the fiber in a direction that deviates from a longitudinal axis of the fiber.

The invention relates to an energy-saving lamp which comprises a shade shell, a heat-dissipating unit and an illuminating unit, wherein the heat-dissipating unit comprises a first heat-dissipating component installed in the shade shell, a second heat-dissipating component arranged in the first heat-dissipating component and an end part heat-dissipating component installed on one end far away fromthe shade shell, of an opening of the second heat-dissipating component, the first heat-dissipating component and the second heat-dissipating component jointly define a heat-dissipating space; and the illuminating unit comprises at least one circuit board arranged outside the first heat-dissipating component and the end part heat-dissipating component, and multiple illuminating components respectively arranged on the circuit board. Through installing the heat-dissipating unit, heat energy of the illuminating unit can be transmitted and dissipated outside; and meanwhile, the heat-dissipating unit has a better heat-dissipating effect, can slow down the light decline of the illuminating components and prolongs the service life of the lamp.

A device for transmitting modulated optical signals between a first unit and a second unit, in which the first unit is supported to be rotatable or movable linearly relative to the second unit, comprises a light guide extending along a given track on the first unit, a first light coupler for coupling light into and out of the light guide, and a second light coupler disposed on the second unit and movable relative to the light guide for coupling light into and out of the light guide. A coupling slide is provided for supporting the second light coupler, and is mechanically loosely connected to the second unit via a take-up unit so that the coupling slide is moved along the given track together with the second unit by a movement of the second unit.

The invention discloses a light emitting diode and a manufacturing method thereof. The light emitting diode device structurally comprises a base, a light emitting diode chip and a light emitting layer on the light emitting diode chip, wherein a metal nano-material coating layer is arranged on an upper surface of the light emitting layer. Since a metal nano structure has a larger specific surface area, excellent heat-conducting property is achieved; the metal nono-material is coated on the upper surface of the light emitting layer, the heat generated by the light emitting diode chip can be effectively conducted, the light emitting diode chip is prevented from being aged at high temperature, and the service life of the light emitting diode is prolonged.

The invention discloses a method for weakening light attenuation of a polycrystalline silicon solar cell. The method comprises the following steps: placing the PERC polycrystalline silicon solar cellunder a temperature of 150-250 DEG C and forwardly applying a voltage of 1-4V, and carrying out processing for 10 minutes; and then, placing the polycrystalline silicon solar cell under a temperatureof 300-550 DEG C and reversely applying a voltage of 0.2-2V, and carrying out processing for 1 minute. The method can reduce the light attenuation of the polycrystalline silicon solar cell to less than 1%; and the method can also realize a certain degree of grain boundary passivation of the polycrystalline silicon solar cell.

The invention discloses a mono-crystalline gallium-doped back passivation solar cell and a preparation method thereof. The mono-crystalline gallium-doped back passivation solar cell comprises a mono-crystalline gallium-doped silicon substrate doped with gallium, an emitter and a back surface field on the mono-crystalline gallium-doped silicon substrate, a passivation and antireflection front antireflection film/passivation film arranged on the surface of the emitter, a back passivation film arranged on the back surface of the substrate, a front electrode arranged on the surface of the front antireflection film/passivation film and composed of a conductive material, and a back electrode arranged on the surface of the back passivation film and composed of a conductive material. The preparation method comprises the following steps: completing surface texturing on gallium-doped silicon; preparing an emitter; carrying out insulation treatment; preparing a front surface passivation/antireflection film and a back surface passivation film; carrying out local film opening on the back passivation film; and carrying out a metallization process.

The invention discloses a heat dissipation structure, and the structure comprises a pedestal and a cover body covering the pedestal. At least one closed cavity is formed between the pedestal and the cover body, and the pedestal and the cover body are made of thermal conduction materials. The pedestal comprises a bottom plate, at least one annular convex part disposed on the bottom plate in a convex manner, and second annular convex parts which respectively surrounds the corresponding first annular convex part. The central area of each first annular convex part is provided with a first storage groove, and each first annular convex part and the corresponding second annular convex part form a clamping groove therebetween. The interior of each clamping groove is provided with adhesive. The cover body comprises a top plate and at least one third annular convex part disposed at the top plate in a convex manner. The cover body covers the pedestal, and each third annular convex part is embedded in the clamping groove through the adhesive to form a closed cavity, wherein the interior of the closed cavity is provided with a heat dissipation body. The structure can enable the heat dissipation body to be sealed in the closed cavity better. Moreover, the invention also relates to a manufacturing method for the structure, and a device employing the structure.

The invention relates to a low-attenuation light emitting diode (LED). The LED comprises a bracket, of which the top is provided with a groove, wherein a chip is fixedly arranged in the groove of the bracket, a coating layer covers the chip, a fluorescence conversion layer covers the coating layer, and a layer of light matching body covers the fluorescence conversion layer. According to the LED, due to an encapsulation structure that the chip is covered by adopting the coating layer, the photo-thermal effect on the fluorescence conversion layer caused by the chip can be reduced, the light attenuation is retarded, and the magnitude of color drift is reduced; and the motion path of fluorescent powder is shortened by the fluorescence conversion layer, and the nonuniformity of settlement of the fluorescent powder can be effectively prevented. The LED has the advantage that the problems of the current LED encapsulation that the light attenuation is high, light spots are nonuniform, the Bin entering ratio is low, and the like are solved.

A device for transmitting modulated optical signals between units comprises a first unit and a second unit, the first unit being supported to be rotatable with respect to the second unit, a light guide along a circular track on the first unit, a first and a second light coupler for coupling light signals into or out of the light guide, the second light coupler being disposed on the second unit and movable with respect to the light guide. For an achievement of a high transmission bandwidth, a controllable absorber is provided in the light guide to prevent a propagation of light along a plurality of paths between the two units. In a method for operating the device, the absorber is controlled so that modulated light signals from the first and the second directions have a same amplitude at a point at which the modulated light signals have the same phase.

Provided is an LED light-compensating lamp with a heat radiation device. The LED light-compensating lamp comprises an LED lamp module, a lampshade, and a heat radiation shell used for heat radiation of the LED lamp module, a plurality of light through holes corresponding to LED lamps in the LED lamp module are formed on a front end surface of the lampshade, a main control panel used for providing a power supply for the LED lamp module is arranged in the heat radiation shell, a heat radiation aluminum substrate of the LED lamp module is fixedly connected to a front panel of the heat radiation shell via bolts, and the lampshade covers the LED lamp module and is fixedly connected to the front panel of the heat radiation shell via the bolts. According to the LED light-compensating lamp, heat generated during the operation of the high-power LED lamp module is directly emitted via the shell, the heat radiation efficiency is greatly improved via the design, overall low temperature rise of the light-compensating lamp is guaranteed, the phenomenon of light failure of the high-power LED light-compensating lamp can be effectively alleviated, the thermal effect of heat generated by the high-power LED lamp module on the main control panel is reduced, and the after-sales maintenance problem of the LED lamp can be conveniently realized.

The present invention is suitable for the laser technology field, and provides a beam combiner. The beam combiner comprises a dual fiber collimator, a single fiber collimator and an optical filter. The dual fiber collimator comprises input fibers configured to transmit pump light, active fibers configured to perform light amplification and a first lens in non-interface welding with the end portions of the input fibers and the active fibers, wherein the welding end of the first lens is a plane, one end opposite to the welding end is a curve, the optical filter is arranged on the output light path of the curve, the pump light is reflected to the active fibers and transmits signal light, the single fiber collimator comprises output fibers and a second lens in non-interface welding with the end portion of the output fibers, and the non-welding end of the first lens is opposite to the non-welding end of the second lens. Because there is no interface between each fiber and each lens, there is no attenuation when the pump light and the signal light are transmitted between the fibers and the lens, and the optical coupling efficiency is high; the power bearing capacity is high, and the high-power transmission is realized; a fiber fusion-elongation technology is not employed, the fiber performance itself can be maintained, the pump conversion efficiency is high, and the product performance is stable.

The invention provides a light source module and a packaging method thereof, and a lighting device using the light source module. The packaging method of the light source module comprises the following steps of coating: coating fluorescent glue on two first transparent glass sheets respectively; drying: carrying out a drying step on the fluorescent glue which is coated on the two first transparent glass sheets respectively so that the two first transparent glass sheets form fluorescent glue layers respectively; packaging: packaging several light emitting diodes between the two first transparent glass sheets through an optical cement so as to form the light source module. The lighting device makes that any two adjacent light source modules form a 120-degree included angle. The lighting device possesses a peripheral light illumination area. The invention also provides the lighting device. The device comprises a lamp shell, a lamp holder, a lampshade and three light source modules, wherein the lamp shell possesses an opening; one side of the lamp shell, which is far away from the opening, possesses a conductive joint; the lamp holder is clamped in the opening; the lampshade possesses a light transmission property and is clamped in the lamp holder.

The present invention relates to a multilayer packaging structure, light conversion particle and luminous element in its division light conversion layer. Luminous element generated high temperature does not make directly light conversion particle oxidative stain, therefore capable of effectively reducing current luminous element light decline phenomena generated by high temperature heating for a long time, and then prolonging said multilayer packaging structure illuminator service life.

The invention discloses a light attenuation resistant PERC single crystalline silicon solar cell aluminum paste. The aluminum paste is prepared from the following components in parts by weight: 70 to86 parts of aluminum powder, 0.5 to 2.5 parts of an inorganic binder, 10 to 24 parts of an organic binder and 0.1 to 1.5 parts of an inorganic auxiliary agent. The invention also discloses a preparation method of the aluminum paste. The preparation method comprises the following steps: firstly uniformly stirring the organic binder and the inorganic auxiliary agent, then adding the inorganic binderand the aluminum powder in sequence to be stirred uniformly, and finally grinding to obtain the aluminum paste. An PERC single crystalline silicon solar cell obtained by using the aluminum paste hasthe characteristics of high photovoltaic conversion efficiency and light attenuation resistance.

A combination of sensors are strategically placed along a pipeline to measure critical properties such as temperature and pressure of the flow product. The sensors are a combination of fiber optic sensing devices that are specifically designed to measure a range of properties within particular bandwidth, with a method to reduce light attenuation over the long pipeline distances. The pipeline is typically subsea and can range widely in diameter. In many cases the pipeline has a coating that acts as a barrier to the corrosive sea water and additional thermal barriers.

The invention discloses a acrylic plate for light guiding and a production method thereof. The acrylic plate for light guiding is prepared from the following raw materials of, in parts by weight, 40-50 parts of methyl methacrylate, 20-30 parts of acrylic resin powder, 2-4 parts of stearyl amine, 6-9 parts of nano organic silicone resin powder, 1-3 parts of 2,2'-azobisisoheptonitrile, 2-4 parts oftalcum powder, 4-5 parts of modified nano silicon dioxide, 3-5 parts of chloromethyl acetate, 4-6 parts of lauryl sodium sulfate, 5-7 parts of calcium carbonate, 8-10 parts of styrene, 1-2 parts of pearlized paste, 3-5 parts of silicon oil, 5-7 parts of calcium lignosulphonate and 4-6 parts of hydroxypropyl methyl cellulose. The acrylic plate can remove impurities, such as a polymerization inhibitor and moisture, so that the reflexivity of the plate is improved, the light attenuation degree is reduced, accordingly the light transmittance is improved, and can reach 94% or more, and meanwhile the acrylic plate has good mechanical properties.

The present invention relates to a method for forming a 3D optical component comprising the steps of: forming over a substrate a liquid layer of a polymer in a solvent, drying said polymer for removing at least a portion of said solvent and thereby creating a layer having a first dissolution rate, exposing by multi-photon absorption using an electromagnetic radiation source a predefined volume of said layer, thereby causing the volume to have a second dissolution rate which is different to said first dissolution rate, dissolve the non-exposed areas with a liquid solution for forming the 3D optical component, wherein said polymer is Hydrogen silsesquioxane, HSQ, and said dried layer having a thickness of at least 1 μm.