127 results about "LED circuit" patented technology

The invention provides a precise baking process optimization method and system for a mini LED circuit board, a baking oven is divided into a preheating area, a main baking area and a cooling area, a double-circulation hot air system and top vertical airflow are adopted, infrared and digital humidity sensors are combined, independent temperature and humidity regulation and control are realized, nitrogen-argon mixed gas is injected, and opening and closing of injection holes are adjusted based on the thickness of a substrate, so that the precise baking process of the mini LED circuit board is realized. Maintaining positive pressure and oxygen content in the box based on a three-dimensional pressure sensor network, prolonging heating time according to environment humidity in a preheating stage, performing gradient control on a heating rate, constructing a humidity-moisture absorption rate mapping table and a three-layer neural network model, adjusting power output in combination with Z-axis temperature difference, and adopting forced air cooling and nitrogen sealing procedures in a cooling area; and a plate explosion prediction model is established, a historical data triggering parameter adjustment mechanism is combined, baking parameters are written into the two-dimensional code of the substrate through a block chain technology, and traceability of the whole process is realized.

The utility model, which relates to the technical field of the LED, discloses a leakage protection circuit comprising a power supply circuit, a step-down circuit, an LED circuit and a detection circuit. The input end of the power supply circuit is connected to the output pin of the power supply end, the output end of the power supply circuit is connected with the input end of the step-down circuit and the input end of the LED circuit, and the power supply circuit is used for rectifying the output power supply of the power supply end so as to output the power supply to the step-down circuit and the LED circuit; the output end of the step-down circuit is connected with the detection circuit, and the step-down circuit is used for carrying out step-down processing on the power supply output by the power circuit to output reference voltage to the detection circuit; and the detection circuit is respectively connected with the output pins of the power supply end and the LED circuit, and is used for controlling the working state of the LED circuit according to the real-time voltage difference and the real-time voltage between the output pins of the power supply end and the reference voltage output by the step-down circuit. According to the utility model, the working state of the LED circuit can be controlled according to the real-time voltage difference, the real-time voltage and the reference voltage, thereby realizing anti-creeping protection.

The utility model relates to the technical field of warning lamps, and discloses an LED warning lamp with an acousto-optic synchronous warning function, which comprises an outer sleeve, an LED circuit board is mounted at the upper end of the outer sleeve in a sleeving manner, a propagation hole is formed outside the outer sleeve, a bottom plate is mounted at the lower end of the outer sleeve in a matched manner, and a vertical column is fixedly connected to the middle of the bottom plate. The stand column is sleeved with a rotating seat, and the middle of the rotating seat is fixedly connected with a sound wave conduction sleeve. According to the LED warning lamp with the acousto-optic synchronous warning function, a motor is started, the motor drives a rotating seat to rotate, the rotating seat drives a sound wave conduction sleeve to rotate on the inner side of an outer sleeve, namely, after a scraper blade gives an alarm, the alarm can be conducted in different directions, and the warning effect of a sound wave warning device is improved; the sound wave conduction sleeve drives the scraping plate to scrape the inner side of the outer sleeve, and then the cleanliness of the interior of the outer sleeve is improved in the process that the scraping plate is driven to give an alarm.

The application discloses a large-size thin-plate mini LED circuit board anti-soldering processing method, which comprises the following steps: adjusting the distance of the clamp according to the specification of the circuit board, clamping the circuit board by the clamp, and supporting the circuit board by contacting the needle tip of the silk screen top pin with the substrate area of the circuit board; conveying the circuit board to the lower side of the alignment mechanism by the conveying runway; grabbing the circuit board by the mechanical hand and stretching the circuit board to make the circuit board flat and free of bending; performing alignment on the mark point on the circuit board by the CCD alignment device of the alignment mechanism; conveying the circuit board to the silk screen platform by the conveying runway after alignment; loosening the circuit board by the clamp; adjusting the distance between the two ends of the clamp to be greater than the length of the circuit board by the distance adjusting device; driving the track to move downward by the jacking device; and driving the conveying runway to return by the driving device. The large-size thin-plate mini LED circuit board anti-soldering processing method provided by the application solves the problems of the failure of the CCD to align, the smearing of the ink, the deviation, the bruising of the circuit by the nail bed and the like, improves the production efficiency, and guarantees the product quality.

The invention relates to the technical field of LED lamp strip processing, in particular to a connecting structure and method for voltage drop electricity compensation of a flexible lamp strip, and the connecting structure for voltage drop electricity compensation of the flexible lamp strip comprises an LED circuit board, a core wire and wiring terminals arranged at the two ends of the lamp strip; the core wire is coated on the LED circuit board, and a lead is arranged in the core wire; connecting flat cables are welded to the two ends of the LED circuit board. The wiring terminals are located at the two ends of the lamp strip, and the wire and the connecting flat cable are connected and fixed through the wiring terminals. A flat cable welding and automatic injection molding integrated process is adopted, and traditional manual welding, hook knife skin breaking and winding operation are replaced. The whole process is simple, convenient and rapid, the time for wiring and parallel connection is greatly reduced, the dependence on the personal technical proficiency of workers is reduced, the consistency of product quality is ensured, and the production cost is effectively reduced.

The utility model discloses a silica gel lamp band which comprises a silica gel shell, an LED circuit board is installed at the bottom of an inner cavity of the silica gel shell, a plurality of LED lamp beads are arranged on the upper side of the LED circuit board in the length direction of the LED circuit board, the LED circuit board is electrically connected with the LED lamp beads, light scattering silica gel is bonded to the upper end of the silica gel shell, and the light scattering silica gel is arranged on the silica gel shell. The lower side of the light-diffusing silica gel is provided with arc-shaped silica gel, the arc-shaped silica gel protrudes towards the side away from the LED lamp beads, the silica gel shell is made of opaque silica gel materials, light emitted by the LED lamp beads is diffused to the outside through the light-diffusing silica gel, the left side and the right side of the upper end of the silica gel shell are each provided with a groove, and the lower side of the light-diffusing silica gel is provided with an inserting strip. The inserting strip is inserted into the groove, the silica gel shell is made of non-transparent silica gel materials, light emitted by the LED lamp beads is emitted outwards through the light scattering silica gel, the light emitting brightness and the light gathering performance are improved, and meanwhile the diffusion effect of lamplight is improved through cooperation of the arc-shaped silica gel and the light scattering silica gel.

The flexible LED circuit board comprises a flexible base material layer and a conductive layer, the conductive layer is embedded in the middle of the flexible base material layer, a plurality of open slots are formed in the upper end face of the flexible base material layer at equal intervals, and bonding pads on the conductive layer are exposed through the open slots; the multiple LED lamp beads are welded to the bonding pad, the two sides of each LED lamp bead are positioned and clamped through the structure of the flexible base material layer, and when the folding angle is too large, the LED lamp beads and the flexible base material layer are automatically separated to release stress; the flexible base material layer forms an elastic stretching section at the position of the opening groove, the conductive layer forms an arc-shaped conceding section at the corresponding position, and the structure can absorb extrusion deformation and prevent breakage when bent. According to the invention, the foldability and durability of the circuit board are improved, the self-adaptive protection and maintainability of the lamp beads are realized, and the circuit board is suitable for the fields of foldable display and flexible illumination.

The utility model discloses a multi-partition multi-angle dome light source which comprises a dome lampshade, a bottom plate, a diffusion plate and a plurality of soft LED circuit boards. The dome lampshade is fixedly connected to one side of the bottom plate, a hemispherical inner wall is formed on the inner side of the dome lampshade, the soft LED circuit boards are arranged on the hemispherical inner wall in a tightly attached mode, so that the soft LED circuit boards form different irradiation angles, a plurality of sets of working areas working independently are arranged on each soft LED circuit board, and the working areas are arranged in the working areas. Each working area is provided with an independent cable which is externally connected with a connecting terminal; lED lamp beads which are uniformly distributed are arranged on each working area; a hemispherical diffusion part matched with the hemispherical inner wall in shape is formed on the diffusion plate, and the diffusion plate is fixedly connected to the other side of the bottom plate, so that the hemispherical diffusion part is arranged in the hemispherical inner wall and covers the LED lamp beads. According to the utility model, partitioned illumination can be realized, and the brightness utilization rate is higher than that of conventional dome light.

The application relates to the technical field of LED circuit, in particular to a lamp color adjusting circuit with a thyristor light modulation module, which comprises a rectifier circuit, a multi-grade dial code color adjusting circuit, a frequency flash removing circuit, a thyristor current discharge circuit and a constant current light modulation circuit. The rectifier circuit converts an alternating current power supply into a direct current voltage to supply power to a circuit system. The multi-grade dial code color adjusting circuit adjusts the current distribution of LED lamp beads through a dial code switch and a second group of resistors, generates a color adjusting signal, carries out low-pass filtering and dynamic compensation on the color adjusting signal, and outputs a pure control signal to the thyristor current discharge circuit. The thyristor current discharge circuit adjusts a current path according to the control signal to provide a smooth and adaptive power supply for the constant current light modulation circuit. The constant current light modulation circuit realizes constant current output. The design significantly reduces the hardware cost and the complexity of the circuit system, effectively suppresses electromagnetic interference in combination with the low-frequency modulation characteristics of the thyristor, and realizes the balance between light modulation precision and the stability of the circuit system.

The invention discloses a production temperature control system and method for a Mini LED circuit board. The method comprises the steps that appearance pictures of circuit boards located at a plurality of preset baking positions are collected according to a preset frequency; a humidity display card is arranged on the circuit board at each preset baking position; confirming feature data based on the appearance picture of the circuit board; determining the water content of the circuit board based on the characteristic data of the circuit board, and drawing a water content change curve of the circuit board; whether the current drying temperature is qualified or not is determined based on the water content change curves of the circuit boards at the preset baking positions; if not, determining a temperature adjusting scheme based on a plurality of water content change curves; the temperature adjustment scheme comprises an adjustment speed and a target temperature; and based on the temperature adjusting scheme, the drying temperature is adjusted to the target temperature. The technical problem of unstable baking quality of the circuit board in the prior art is solved.

The present application relates to the technical field of LED control circuit board manufacturing, solves the problem that the host computer cannot accurately learn the actual health status of the selenium drum in the prior art, which leads to inaccurate evaluation of the service life of the selenium drum and affects the reliability of the LED circuit control board, and provides a selenium drum service life evaluation method, device, equipment and medium based on state monitoring. The method comprises the following steps: obtaining the reference corresponding relationship between the printing data and the consumption of the selenium drum by performing test printing; monitoring the selenium drum to obtain actual state data; obtaining the actual corresponding relationship between the printing data and the consumption of the selenium drum; obtaining the consumption deviation value according to the reference corresponding relationship and the actual corresponding relationship; and evaluating according to the consumption deviation value and the actual state data to obtain a service life evaluation result. The present application comprehensively evaluates the service life of the selenium drum based on the consumption deviation and the actual state, thereby effectively improving the accuracy and real-time performance of the service life evaluation.

The utility model discloses a kind of mini LED circuit board of quick stable butt joint, including circuit board, protective edge, shell, limiting structure and plug block, the rear end of plug block is fixed with circuit board, shell is set on circuit board, shell is set with insulating material, the side end of shell is fixedly connected with protective edge, the side end of protective edge is fixedly provided with limiting structure;Limiting structure is used to butt joint fixed, fixed block in limiting structure, link block are supported, and link block, guide frame, spring are used for the elastic connection of sleeve rod, sleeve rod is rotatably arranged card frame, and it is fixed by card frame and circuit board, plug block adaptive card seat are fixed.The utility model discloses a kind of mini LED circuit board of quick stable butt joint, by the setting of structure, the purpose of quick stable butt joint is realized.

The utility model relates to the technical field of LED circuit boards, and discloses an independent heat exchange module LED circuit board, which comprises a circuit board main body and a connecting frame, a rotating seat is fixedly connected onto the connecting frame, a rotating plate is rotatably connected onto the rotating seat, two connecting plates are fixedly connected onto the rotating plate, one end of a first spring is fixedly connected onto each connecting plate, and the other end of the first spring is fixedly connected onto the connecting frame. The other end of the first spring is fixedly connected with a fixing disc, the fixing disc is fixedly connected with a limiting rod, the connecting plate is provided with a limiting opening and a sliding opening, the sliding opening is fixedly connected with one end of a second spring, and the other end of the second spring is fixedly connected with a pushing block. A limiting plate is fixedly connected to the pushing block, and a limiting hole is formed in the limiting plate. Heat conduction is performed on the circuit board main body through the heat conduction plate, heat dissipation is performed on the heat conduction plate through the heat dissipation plate, and the limiting rods are tightly connected with the limiting holes, so that quick connection and disassembly of the connecting frame and the circuit board main body are guaranteed.

The application discloses an LED circuit board strip cutting device and a use method thereof, and particularly relates to the technical field of LED lamp production equipment. The LED circuit board strips cut on both sides are positioned by limiting pressing blocks. In the initial state, the upper and lower collecting frames are located below the end of the feeding belt, and the middle LED circuit board strips lack limitation. When the transfer frame reaches the end of the feeding belt and continues to rotate, the LED circuit board strips lacking positioning limitation and having a wide width fall into the upper collecting frame. When the LED circuit board strips having positioning limitation and having a short width reach the position of the lower collecting frame, the two limiting pressing blocks are opened, the LED circuit board strips having a short width are collected by the lower collecting frame, and the collection of LED circuit board strips with two different widths is realized. The upper collecting frame slides out of the material belt I for discharging, and the lower collecting frame slides out of the material belt II for discharging. The corresponding collecting frame is driven to rotate by a rotating motor, so that the LED circuit board strips in the collecting frame can be conveniently poured out.

The utility model discloses a drive circuit board with a good heat dissipation effect, which relates to the technical field of LED circuit boards, and is characterized in that the drive circuit board comprises a metal substrate and a plurality of LED lamp beads, the top surface of the metal substrate is sequentially provided with an insulating layer, a circuit layer and a heat conduction enhancement layer, the heat conduction enhancement layer covers the circuit layer and forms a welding connection part, and the LED lamp beads are arranged on the metal substrate. A plurality of heat conduction plates are arranged on the insulating layer, and the LED lamp beads are located on the heat conduction plates and connected with the two adjacent welding connecting parts. According to the high-power LED module, through the collaborative design of the metal substrate, the heat conduction enhancement layer and the first honeycomb-shaped heat dissipation holes and the cooperation of the heat dissipation fins, convection heat dissipation is enhanced, the heat dissipation bottleneck of the high-power LED module is solved, the structure does not need to be externally connected with a radiator, and the high-power LED module has the advantages of being low in cost, long in service life and wide in application range.

The invention discloses a method and device for conveniently searching a wireless pedal controller. The method comprises the steps that a host is awakened through a voice instruction; after the host identifies the voice instruction, a searching instruction is sent to the wireless pedal controller through the wireless communication module; the wireless pedal controller receives the searching instruction and awakens a main control circuit of the wireless pedal controller; and the main control circuit controls the LED power supply circuit to supply power to the LED circuit and controls the LED to be lightened or flicker to prompt the position. The device comprises a host and a wireless pedal controller, the host comprises a main control module, a voice recognition module and a wireless communication module, and the wireless pedal controller comprises a wireless communication module, a main control circuit, an LED power supply circuit and an LED circuit. The LED power supply circuit adopts an N-MOS tube to control on-off of power supply, and the power supply is switched off during dormancy so as to reduce power consumption. The problem that the wireless pedal controller is difficult to quickly position in the operation environment is solved, a doctor is helped to quickly find the pedal controller under an operation table through voice wake-up and LED visual prompt, and the operation efficiency is improved.

The invention provides a high-order fine-line circuit board, a manufacturing method thereof and a mold manufacturing method. The mold manufacturing method comprises the following steps: determining a first region and a second region in the high-order fine-line circuit board; obtaining a first processing pattern and a second processing pattern, wherein the line spacing and the bonding pad spacing in the first processing pattern are greater than the line spacing and the bonding pad spacing in the second processing pattern; and according to the first processing pattern and the second processing pattern, the first etching area and the second etching area are cut by using laser, so that a first etching hole is formed in the first etching area on the preset mold, and a second etching hole is formed in the second etching area on the preset mold. According to the circuit board and the manufacturing method of the circuit board, the etching holes with different hole diameters are machined in the preset die through the laser according to the line spacing and the bonding pad spacing of the different areas of the circuit board, the circuit layer matched with the line spacing and the bonding pad spacing of the Micro-LED is etched on the circuit board, the production efficiency of the Micro-LED circuit board is improved, and the production cost is reduced.

The utility model relates to the field of LED circuit boards, and discloses a small-size LED circuit board which comprises a mounting bottom plate, an LED circuit board body is arranged on the top surface of the mounting bottom plate, a buffer mechanism is arranged between the mounting bottom plate and the LED circuit board body, and the buffer mechanism comprises a fixing hole, a positioning mounting column, a buffer support and a fastening nut. A plurality of fixing holes are formed in the positions, close to the corners, of the top face of the LED circuit board body, a plurality of positioning installation columns corresponding to the fixing holes are fixedly installed at the positions, close to the corners, of the top face of the installation bottom plate, and a worker firstly penetrates through the installation holes through bolts to integrally fix the installation bottom plate and the LED circuit board body into an equipment shell; once equipment vibrates, the mounting bottom plate can drive the positioning mounting columns and the buffer support to move upwards, and the buffer support can give full play to the buffer characteristic when making contact with the bottom of the LED circuit board body, so that the risk that components are damaged due to rigid collision between the LED circuit board body and the shell or the mounting bottom plate can be reduced.

The invention belongs to the technical field of automobile lamps, and discloses an automobile lamp thick-wall light guide structure, an automobile lamp and an automobile, the automobile lamp thick-wall light guide structure comprises an LED light source, an LED circuit board and a thick-wall light guide, the LED light source is fixedly connected to the LED circuit board, the thick-wall light guide is fixedly connected to the LED circuit board, and the thick-wall light guide comprises a condenser, a reflecting surface, a light guide upper side surface, a light guide lower side surface and a light emitting surface; the light condenser is arranged below the thick-wall light guide and located over the LED light source, the reflecting face and the light-emitting face are obliquely arranged on the two sides of the thick-wall light guide respectively, the reflecting face and the light-emitting face form a splayed structure when viewed from the side, and the light guide upper side face and the light guide lower side face are the upper inner surface and the lower inner surface of the thick-wall light guide respectively. And optical patterns are arranged on the light guide upper side surface and the light guide lower side surface. The optical patterns are arranged on the upper side face and the lower side face of the thick-wall light guide, the light path direction is changed, bright spots are prevented from being formed, the requirement for lighting uniformity of the vehicle lamp is met, cost is not increased, and application is wide.

The utility model belongs to the related technical field of LED circuits, in particular to a self-adaptive dual-power LED lamp, which comprises a power supply module, a rectifying unit, a filter capacitor, an LED power supply chip, an LED lamp string, a first resistor, a second resistor and a switching tube, a pin 1 of the LED power supply chip is connected with an inductor and the LED lamp string, and pins 2 and 3 of the LED power supply chip are connected with the rectifying unit to an anode and a cathode of the power supply module; the pins 2 and 3 of the LED power supply chip are also connected with a filter capacitor; the switching tube comprises a first triode and a second triode. The base electrode of the first triode is connected with one end of the first resistor and one end of the second resistor. According to the self-adaptive dual-power-supply LED lamp circuit, the LED lamp cannot be extinguished due to instant power failure after alternating current and direct current conversion, the lamp can be ensured to be lightened for illumination when a direct current power supply is connected to a low voltage, the use of the lamp is not influenced by the change of the voltage, convenience is brought to the use of people, and the self-adaptive dual-power-supply LED lamp circuit meets the market demand.

The utility model relates to the technical field of heat dissipation of electronic equipment, and discloses an LED circuit board with a water-cooling heat exchange mechanism, which comprises a circuit board, an insulating heat conduction assembly, a heat exchange assembly and a heat dissipation assembly, the bottom end of the circuit board is fixedly provided with an insulation heat conduction assembly, the insulation heat conduction assembly is fixedly provided with a heat exchange assembly, and the heat exchange assembly is provided with a heat dissipation assembly. The spiral raised heads and the spiral grooves are arranged on the inner wall of the heat exchange tube, cold water flows into the heat exchange tube from the water tank, the spiral raised heads block and divide water flow, change the flow direction of the water flow, prolong the retention time, improve the heat exchange efficiency and quickly take away heat of the circuit board, and the insulation heat conduction assembly enables the storage box to be installed at the bottom end of the circuit board. The ceramic substrate isolates electrical interference between a circuit and a water cooling component, heat of the circuit board is transferred to the heat exchange assembly, heat dissipation fins of the heat dissipation assembly are evenly distributed on the outer side of a heat exchange tube, the contact area with air is increased, heat dissipation is achieved through air convection, and the heat dissipation requirement is met.

The invention relates to a LED breaker (23) intended to be installed in series between a LED driver (21) and a LED source (22), the LED breaker (23) comprising: - a controlled switch (231) installed in series between the LED driver (21) and the LED source (22) for closing or opening the electrical circuit, - a sensor (232) measuring the power provided by the LED driver (21) to the LED source (22), the sensor (232) providing a measure, - a control circuit (233) connected to the sensor (232) to receive the measure and to the controlled switch (233) to control said switch, the control circuit (231) being configured for: o time integrating the measure to obtain an illumination value (CNT) representative of the amount of illumination, o opening the controlled switch (231) when the illumination value exceeds a predetermined threshold.

The utility model discloses an equal-point spacing waterproof transparent screen module, which comprises a mask, an LED circuit board and a bottom shell, the bottom shell is arranged on the back of the mask, the LED circuit board is arranged between the mask and the bottom shell, the mask is provided with a first light hole, the LED circuit board is provided with a second light hole, and the bottom shell is provided with a third light hole. The first light-transmitting holes, the second light-transmitting holes and the third light-transmitting holes are arranged in a matrix mode and correspond to one another in position, hollow light-transmitting columns are formed by extending along the inner walls of the third light-transmitting holes and inserted into the second light-transmitting holes, and sealant is poured into the bottom shell to seal the LED circuit board. The first buckle is arranged on the side face of one of the mask and the bottom shell, the first buckle position is arranged on the side face of the other one of the mask and the bottom shell, the first buckle and the first buckle position are detachably clamped together, images are displayed at equal intervals, image information is not lost, and the waterproof effect is good.

The application provides a vehicle LED circuit board with a high-efficiency heat dissipation structure, relates to the technical field of LED circuit boards, and comprises a circuit board body, the lower surface of the circuit board body is detachably connected with a heat dissipation box, the lower surface of the circuit board body is fixedly connected with a plurality of array-distributed heat conduction strips, the lower surface of the heat conduction strip is fixedly connected with a corrugated heat conduction fin, the inside of the heat dissipation box is provided with a heat dissipation device, the heat dissipation device comprises a stability plate, a connecting rod and a fan blade, the upper surface of the stability plate is fixedly connected with a moving block, through the high-efficiency heat dissipation structure composed of the heat conduction strip, the corrugated heat conduction fin, the transverse heat conduction sheet, the heat dissipation device, the driving assembly and the reciprocating assembly, the effects of rapid and uniform heat conduction of the circuit board body and full-area reciprocating air cooling of the heat dissipation device are realized, the limitations of traditional passive heat dissipation and fixed air cooling are broken, local heat accumulation is prevented, the heat dissipation speed is greatly accelerated, and the overall heat dissipation efficiency of the vehicle LED circuit board is improved.

A surface light comprising a base with a battery compartment for holding a battery, an LED circuit, a display unit and a control unit connected to the battery compartment, the LED circuit and the display unit.The control unit is configured to control the LED circuit to output an initial lumen value, to control the display unit to output an initial display when the current remaining battery time is less than a first predetermined time period, to control the LED circuit to output the first lumen value after the first display, to control the display unit to output a second display when the current remaining battery time is less than a second predetermined time period, where the second predetermined time period is less than the first predetermined time period, and to control the LED circuit to output a second lumen value that is less than the first lumen value after the second display.

The utility model discloses a kind of lamp tube electric leakage protection circuit, including power supply circuit, ballast driving circuit, mode detection circuit, LED circuit and ballast switch driving circuit;The output end of power supply circuit is connected with ballast driving circuit and LED circuit respectively, for accessing commercial power or ballast, and provide direct-current power to ballast driving circuit and LED circuit after rectification processing;Ballast driving circuit is connected with ballast switch driving circuit, for the input direct-current power voltage regulation processing is handled, and power supply signal is output to ballast switch driving circuit;Mode detection circuit is connected with the input end of power supply circuit, for detecting the power supply signal of power supply circuit access, and according to power supply signal switch control signal is output to ballast switch driving circuit;Ballast switch driving circuit is connected with LED circuit, for according to power supply signal and switch control signal control the working state of LED circuit. Adopt the utility model, can realize anti-leakage protection.

The utility model relates to the technical field of cooling fans, in particular to a cooling fan which comprises a fan body, and the fan body comprises a fan blade structure, a light guide element and an LED circuit board. The fan blade structure comprises a central hub and blades; one end of each light guide element extends along the first surface of the corresponding blade to form a light emitting point, and / or one end of each light guide element extends along the first surface of the corresponding blade from the cavity of the central hub, penetrates through the corresponding blade and forms a light emitting point on the second surface of the corresponding blade; the first faces of the blades are arc-shaped curved faces, the light guide elements extend along the curvature of the arc-shaped curved faces, light receiving points are arranged at the ends, facing the center hub, of the light guide elements, and shading sleeves are arranged at the extending positions of the light guide elements along the first faces of the blades. The LED circuit board is connected with a plurality of LED lamp beads, and the LED lamp beads are arranged on the outer side of the cavity. The cooling fan can emit light and is good in visual experience.

The utility model relates to the technical field of vehicle logo decorations, in particular to a diamond sticker attached to the shape of a vehicle logo, which comprises a waterproof sticker, a pattern corresponding to the vehicle logo is arranged on the front side surface of the waterproof sticker, and a plurality of vehicle logo decoration diamonds for decoration are adhered to the surface of the pattern corresponding to the vehicle logo. A plurality of edge decoration diamonds used for auxiliary decoration are further adhered to the front side face of the waterproof sticker, a hollow annular LED circuit board is fixedly installed on the front side face of the waterproof sticker, a plurality of LED colored lamps used for decoration are fixedly installed on the LED circuit board, a transparent waterproof cover is fixedly installed on the front side face of the waterproof sticker, and the transparent waterproof cover is fixedly installed on the front side face of the waterproof sticker. The transparent waterproof cover is used for protecting the LED circuit board and the LED colored lamp inside, an adhesive layer is arranged on the back face of the waterproof sticker, and a threading hole is formed in the transparent waterproof cover. The automobile logo has the effects of obviously displaying the automobile logo and carrying out colored lamp decoration.

A therapy light comprises a housing and a circuit board mounted within the housing and having light emitting diodes mounted thereon. Airflow apertures in the circuit board are disposed adjacent the light emitting diodes such that the front face and the back face of the circuit board are in airflow communication one with the other. The ratio of the cumulative cross-sectional area of the airflow apertures to the cumulative cross-sectional area of the light emitting diodes is greater than about 3:2. In use, a fan causes air to flow into an intake ventilation opening, from the intake ventilation opening to the circuit board, through the airflow apertures in the circuit board, and out of an exhaust ventilation opening, to thereby cool the light emitting diodes.

The utility model relates to the technical field of railway safety, and discloses a railway transportation auxiliary safety alarm device which comprises an installation base, a shell is fixedly installed at the top end of the installation base, an auxiliary assembly is fixedly installed at the right end of the shell, and a positioning assembly is arranged on the right side of an inner cavity of the shell. A rotating plate is hinged to the left side of the rear end of the mounting base, a fixing pipe is fixedly mounted at the right end of the rotating plate, and an LED circuit board is arranged in an inner cavity of the shell. The inner positioning ring is installed on the LED circuit board to be inserted into the outer positioning ring, the LED circuit board and the shell are preliminarily positioned, after the rotating plate is closed, the moving rod on the fixing pipe can be pressed on the left side of the LED circuit board, the right side of the LED circuit board makes contact with the fixing block, then the LED circuit board is fixed through the fixing block and the moving rod, and therefore the LED circuit board can be fixed conveniently. After the rotating plate is opened, the LED circuit board loses pressure on the left side and can be directly drawn out, operation is easy and convenient, and the maintenance efficiency is improved.