1) The invention creates its own AC-DC conversion circuit and integrates it with the LED working circuit into the same circuit board, thereby realizing the function of the LED light bar being directly connected to 220 volt AC power, allowing it to be directly used in commercial applications during actual use. There is no need to convert electricity, which not only simplifies the installation difficulty of LED light strips, improves the convenience of use, but also saves the low-voltage DC power supply of technology before February 2014, reduces product costs, and has the advantages of simple structure and low cost. , and can greatly reduce the failure rate.
(2) Since most advertising LED light boxes are located outdoors, the impact of weather needs to be considered. Before February 2014, electronic devices in technology needed to consider issues such as waterproofing, moisture-proofing, and fireproofing. Therefore, expensive DC waterproof power supplies must be used. To solve this problem, a waterproof insulation structure is wrapped around the AC-DC conversion circuit, which is made of lower-priced PVC potted silica gel. This not only achieves the insulation and waterproof function, reduces the maintenance workload and cost, but also reduces the cost. Cost of production.
(3) In the actual application of this invention, the size of the LED light box is inconsistent, resulting in a large difference in the required electric power value. Therefore, in order to make the LED lamp beads emit uniform light, a constant current chip is used in the AC/DC conversion circuit instead of a constant current diode, so that Its voltage application range is wider and its adaptability is higher.
(4) In order to prevent uneven lighting of the entire LED light box caused by damage to one LED lamp bead, the LED modules are connected in series. After one LED lamp bead fails to light up, all LED lamp beads stop working. For advertising In terms of field, total extinguishing is better than partial extinguishing, and the negative impact caused by partial extinguishing can be avoided.
(5) The circuit used in this invention is simple and reliable, with a rectifier device as the core, which directly converts 220 volt AC power into 240 volt DC power, supplies multiple LED lights connected in series, and connects a continuous power supply to the LED working circuit. The current diode D2 can effectively ensure that the LED is in a constant current state for a long time and ensure the uniformity of light emission.
(6) This invention uses a light bar shell that is composed of a PC slot, a PC transparent lampshade, a PVC soft plug and a PC protective cover. It has a good sealing effect, can further improve the waterproof, dustproof, and insulation effects, and is durable. Durable and extremely long lasting.
(7) The PVC soft plug of this invention adopts a combination of semicircular and rectangular shapes, and all the edges and corners are designed into an arc structure. It not only has a beautiful appearance, but also can minimize the movement, installation, use, and The wear and tear that easily occurs during maintenance allows it to remain in its original state for a long time, thereby extending its service life, reducing the chance of repair and replacement, and increasing its practical value.
