37results about How to "Reduce light decay speed" patented technology

The invention discloses a heat radiation device for a loop heat pipe with an enhanced evaporation section used in an LED lamp. The heat radiation device comprises: a heat pipe, a radiating fin and a working liquid. The heat pipe is a loop pipe with a sealed cavity, comprising: an enhanced evaporation section, a reflux section, a steam section, a compensation chamber and a condensing section; the enhanced evaporation section is arranged at the back of a heat source of the LED lamp; the loop pipe is vacuumed properly, internally provided with a wick structure and filled with a proper amount of working liquid; and the radiating fin is arranged on the condensing section. The heat radiation device has the advantages of reasonable and compact structure, easy production, high heat conduction efficiency and high heat radiation speed. The enhanced evaporation section is contacted with the heat source surface directly and sufficiently, therefore, the heat radiation device can effectively reduce the temperature of the LED modules, solve the heat radiation problem of large-power LEDs, improve the light emitting efficiency of LEDs, reduce the light degradation speed of LEDs and prolong the service life of LEDs. Simultaneously, the heat radiation device can reduce the volume and the weight of LED lamps and improve the adaptability and the use range of the LED lamps.

The invention relates to a metal baseplate provided with an LED and a manufacturing method thereof, relating to the technical field of circuit board base materials, and in particular being applied to the technical field of production of a large-power LED metal baseplate. The manufacturing method comprises the following steps: successively plating a diamond-like carbon (DLC) coating on a metal plate; sputtering a metal layer capable of being carbonized on the outer surface of the diamond-like carbon coating; sputtering a thin copper layer outside the metal layer capable of being carbonized; and electroplating a thickened copper layer outside the thin copper layer and then carrying out circuit carving outside the thickened copper layer. The formed aluminium baseplate has excellent insulativity, and the adhesive strength of the diamond-like carbon coating and the baseplate is up to 20kg/cm<2>. The aluminum baseplate has the heat conductivity larger than 10W/mk which is more than twice of that of the traditional insulating layer containing glue, is particularly suitable for the application of the large power LED and can effectively reduce the optical attenuation speed.

The invention relates to a light-emitting diode (LED) tunnel lamp, which comprises LED lamp caps, a front cover, a radiator and a tail cover. The LED lamp caps respectively consist of a substrate, a plurality of single chip LEDs, a lamp cap seat and a lens. The radiator consists of two eudipleural lambdoidal hollow cylindrical objects and fins respectively arranged on convex surfaces of the hollow cylindrical objects; the LED lamp caps are respectively arranged on lambdoidal angular surfaces of nearly symmetric axis on concave surfaces of the hollow cylindrical objects of the radiator; and the front cover and the tail cover are fixedly arranged on the radiator through screws. The LED tunnel lamp has the following advantages: 1, under the action of an open illumination chamber, light distribution of the LED lamp caps is even, and the light intensity is enhanced; 2, natural ventilation channels are additionally arranged on the radiator, and therefore, power consumption-free heat dissipation is realized, the junction temperature of the LED tunnel lamp is reduced, and the light decay speed of the LED tunnel lamp is reduced; and 3, a shell-type structure of the front cover and a shell-type structure of the tail cover are communicated with the outside through an upper space and a lower space, and therefore, the LED tunnel lamp is ventilated without accumulated water, the working environment of the LED tunnel lamp is improved, and the service life of the LED tunnel lamp is greatly prolonged.

The invention discloses a heat radiation device of a heat pipe of a loop of a temperature-equalization tank with high heat conductivity, which can be applied to the field of the high-power illumination of LEDs or the field of the application of an electronic element. The device comprises a heat pipe, heat radiation fins, a temperature-equalization tank with high heat conductivity, liquid with high heat conductivity and the like, wherein an evaporation section of the heat pipe passes through the inside of the temperature-equalization tank with high heat conductivity and is connected with the temperature-equalization tank with high heat conductivity into a whole by a welding mode, a sealing cavity is formed between the temperature-equalization tank with high heat conductivity and the evaporation section, the liquid with high heat conductivity is filled into the sealing cavity, the heat radiation fins are arranged on a condensation section outside the temperature-equalization tank with high heat conductivity, an internal cavity of the heat pipe is pumped into proper vacuum, a capillary structure is arranged in the pipe, and an amount of working liquid is filled into the pipe. The invention has reasonable and compact structure, easy production and manufacture, high efficiency of heat conduction and high speed of heat radiation, is used for the heat radiation of an LED lamp, effectively lowers the temperature of an LED module, enhances the luminous efficiency of the LED, lowers the light enervation speed of the LED and prolongs the service life of the LED.

The invention discloses a thermal-drive natural-circulation lamp pole cooling system for an LED streetlamp, which comprises an LED streetlamp body, a vertical lamp pole, a steam tube and a return tube. The steam tube and the return tube are communicated with the upper end and the lower end of the lamp pole respectively. The other end of the return tube and the other end of the steam tube are respectively communicated with the LED streetlamp body. A partition is disposed inside the LED streetlamp body. An evaporation chamber is reserved below the partition and filled with liquid medium. An LED chip substrate is disposed at the bottom of the evaporation chamber, an LED chip is disposed at the bottom end of the LED chip substrate, and the return tube is communicated with the evaporation chamber. The steam tube is connected to the upper end of the LED streetlamp body. A drain tube is further connected above the partition inside the LED streetlamp body. The other end of the drain tube is communicated with the lower end of the lamp pole. The thermal-drive natural-circulation lamp pole cooling system for the LED streetlamp is reasonable and compact in structure, high in heat conducting efficiency, fast in cooling speed and capable of effectively cooling an LED module, the cooling problem of high-power LEDs is solved, the speed of light attenuation is decreased, and the service life of the LED lamps is prolonged.

The invention relates to dimming control of an LED lamp and light attenuation compensation control of the LED lamp, in particular to an LED light attenuation compensation method based on a knowledge base. Brightness compensation control parameters of an LED lamp are calculated and set by a program in a controller according to a rule of the knowledge base, so that the LED lamp can keep stable illumination brightness output for a long time. The invention provides an LED lamp with a light-emitting allowance reserved. A knowledge base is constructed by utilizing an artificial intelligence technology, all operation data of the LED are monitored in real time, and the amount of light attenuation compensation is determined through a certain algorithm according to the operation data and the knowledge base, so that the illumination of the LED can be stably outputted within a long time, and the light attenuation speed of the LED lamp is reduced on the whole. The method has the advantages that thelight attenuation speed of the whole LED lamp can be well reduced by reserving the small cost of a certain light-emitting allowance when the LED lamp is produced, the service life is prolonged on thewhole, and the maintenance pressure of the LED lamp is reduced.

The invention discloses a heat-dissipating method of an LED (Light-Emitting Diode) heat-dissipating module. The LED heat-dissipating module comprises a heat-dissipating module, an LED module, an optical lens module and a cover plate which are laminated in sequence. By adopting the method provided by the invention, heat of an LED lamp can be dissipated, so that the light decay speed is lowered, and the service life is prolonged. The invention further discloses an LED heat-dissipating module for implanting the method. The LED heat-dissipating module has a reasonable structure, is made of a preferred aluminum material, and has light weight; moreover, radiating fins are provided with strip-shaped vertical bumps which can be used for enhancing the structural strength, increasing the heat-dissipating area and improving the heat-dissipating effect; furthermore, two adjacent radiating fins are fixed together through a fixing pin, so that high stability is achieved; and a ventilation groove isformed between every two adjacent radiating fins for ventilating, so that heat of the LED lamp can be dissipated quickly, the light decay speed is lowered, and the service life is prolonged greatly.

The invention relates to the lamp heat dissipation materials, and particularly relates to a highly-antirust aluminum-based composite heat dissipation material used for LEDs and a producing method thereof. The heat dissipation material is prepared from following raw materials by weight: 60-65 parts of aluminum, 10-11 parts of iron, 5-8 parts of magnesium nitride, 1-1.5 parts of stannous pyrophosphate, 1-2 parts of zinc phosphate, 0.4-0.5 part of calcium phosphate, 0.1-0.2 part of strontium phosphate, 8-10 parts of clay, 12-15 parts of quartz sand, 10-12 parts of silicon carbide, 6-8 parts of aluminum-rich andalusite and 4-5 parts of auxiliary agents. The heat dissipation material integrates advantages of the aluminum, the iron, the magnesium nitride, the clay, the quartz sand, the silicon carbide, and the like and has good heat conducting and thermal insulation properties. The raw materials are fully mixed. Sintering effects are good. The prepared heat dissipation material has characteristics of compact structure, bright and clean surfaces, whether tolerance, water resistance, capability of being not liable to rust and durable in use, good heat dissipation capability, capability of protecting LED lamps and delaying the luminous decaying speed, good using properties and long service lifetime.

The invention discloses an LED (Light-emitting Diode) spotlight, which comprises a heat radiation part with a through hole, a connecting plate and a light-emitting module. The heat radiation part is flatly paved on a surface of the connecting plate; the other surface of the connecting plate is connected with the light-emitting module so as to conduct heat produced by the light-emitting module to the heat radiation part; and an outer side face of the heat radiation part is in a zigzag shape. The heat produced by the light-emitting module in the LED spotlight can be firstly conducted to the heatradiation part through the connecting plate, the transferred heat can be then radiated by utilizing the heat radiation part, the heat radiation part is flatly paved on the surface of the connecting plate, the through hole is formed in the heat radiation part, and the outer side face of the heat radiation part is in the zigzag shape, so that air is conveniently circulated, and a heat radiation area between the light-emitting module and air can be increased; and compared with a traditional light-emitting module with multiple heat radiation fins being directly arranged perpendicularly in the LEDspotlight, a heat radiation effect is better, and the heat radiation efficiency is improved.

The invention discloses a novel LED underground lamp. A lamp shell is in threaded connection with a lamp cover, tempered glass is installed on the lamp cover in a pressed mode through a sealing rubber cushion, the portion, located under an LED illuminating plate, of the lamp shell is provided with a controller, a sound sensor and a voltage adjusting device, the sound sensor and the voltage adjusting device are connected with the controller, the sound sensor is used for collecting the sounds near the lamp, and the voltage adjusting device is used for adjusting the voltage flowing into the LED illuminating plate; when the sounds collected by the sound sensor reach a preset decibel value, the controller controls the voltage adjusting device to adjust the voltage flowing into the LED illuminating plate to be lowered to 40-60% of full-load voltage. According to the novel LED underground lamp, the structure is simple, the electricity consumption is saved, the luminance decrease of an LED light source is slowed down, in addition, the weakened illuminating of the underground lamp is achieved, and the discomfort caused to human eyes on account of dazzle of the lamp is avoided.

The invention discloses an efficient-radiation LED lamp and a production method thereof. The production method includes the steps of firstly, producing a strip-shaped welded PCB (printed circuit board), evenly welding a plurality of LED lamps on the welded PCB, and reserving a through hole on the welded PCB right under each LED lamp; secondly, using graphite to produce a strip-shaped graphite radiator, and evenly disposing a plurality of thermal conducting rivets on the graphite radiator; and thirdly, coating thermal conducting paste on the top surface of the graphite radiator and the top of each thermal conducting rivet, and fixing the top surface of the graphite radiator to the lower surface of the welded PCB, and allowing the top of each thermal conducting rivet to contact with the bottom of each LED lamp to form a efficient radiating structure; wherein, the head of each thermal conducting rivet protrudes out of the graphite radiator, and the distance between two adjacent thermal conducting rivets is identical with the distance between the two adjacent LED lamps on the welded PCB. The invention further provides the efficient-radiation LED lamp produced by the method.

The invention discloses irradiation cross-linked insulating polyethylene master batch capable of resisting UVLED light attenuation. The master batch comprises the following raw materials: matrix resin, a specific photoinitiator, a specific photoinitiation aid, an anti-reflection agent and a specific polyfunctional-group cross-linking aid, wherein the matrix resin is prepared from linear low-density polyethylene resin, a styrene-butadiene-styrene block copolymer, light-transmitting resin and a polyolefin elastomer (POE) and/or an ethylene-vinyl acetate copolymer. The master batch of the invention is high in initiation efficiency and low in processing temperature; customers can purchase matrix resin by themselves according to needs and then subject the matrix resin and the master batch disclosed in the invention to mixing and extrusion processing, so the problem that output efficiency is greatly reduced due to serious light attenuation in the prior art can be solved, and the master batchis convenient to use and easy to operate by the customers; and the insulating master batch provided by the invention can be directly added into existing conventional resin matrix for extrusion molding, and the advantages of processibility at low temperature and sufficient cross-linking degree can also be obtained.

The invention relates to a lamp cap, a motor vehicle lighting device and a motor vehicle. The lamp cap comprises a heat conduction mounting plate, a heat conduction connecting plate, a heat conductionpipe sleeve, a control circuit board, a switching circuit board, lamp boards and a heat dissipation module. The heat conduction mounting plate is connected with the heat conduction pipe sleeve through the heat conduction connecting plate. The control circuit board is arranged in the heat conduction pipe sleeve, and is connected with the end portions of the lamp boards through the switching circuit board. The two lamp boards are arranged on the two side surfaces of the heat conduction mounting plate correspondingly. When the heat dissipation module works, because the heat dissipation module isrelatively close to a lamp bead and the lamp boards, heat of the lamp boards can be better diffused to the outside, the lamp cap has a better heat dissipation effect, the light attenuation speed canbe reduced, and the service life can be greatly prolonged.