什么是食人鱼LED封装？

　　食人鱼LED，是一种封装，正方形的，透明树脂封装，四个引脚，负极处有个缺脚的LED。食人鱼是散光型的LED，发光角度大于120度，发光强度很高，而且能承受更大的功率。由于其显示性能的优越性，被一些封装企业引入LED显示屏封装。

　　该LED显示屏封装新技术优点：

　　食人鱼系列显示屏，是一款介于传统直插灯和传统室内表贴灯之间的三合一直插灯，相对于传统户外246、346直插灯做成的屏，食人鱼系列5353的亮度高、白平衡一致性极好、视角大、红绿蓝灯芯光衰同步、金丝焊线、故障率低特点，这些都是食人鱼系列最大的亮点。由食人鱼5353所完成的全彩显示屏户外防护等级可达IP65以上，从正/侧面看，消除了246、346、546灯珠一直未能解决的“花屏 斑点”等现象。散热方面更优于户外常用3528、5050等表贴三合一做成的灯珠。据业内人士声称，户外三合一直插灯的市场前景比传统的直插灯和表贴更为可观。

　　应用：

　　食人鱼LED越来越受到人们重视，因为它比φ5mm的LED要散热好、视角大、光衰小、寿命长。食人鱼非常适合制成线条灯、背光源的灯箱和大字体槽中的光源。

　　因为线条灯一般用来作为城市高层建筑物的轮廓灯，并且背光源的灯箱广告屏和大字体的亮灯都是放置高处，如果LED灯不亮或变暗，其维修十分困难。由于食人鱼LED的散热好，相对φ5mm的普通LED，其光衰小、寿命长，因此使用的时间也会长，这样可以节省可观的维修费用。

 

编辑：Cedar

SCSI-90°DIP Section

Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.

The last SCSI device in the SCSI chain uses a terminator, and the intermediate device does not need a terminator. Once the terminator is used by the intermediate device, the SCSI card cannot find the future SCSI device. If the last device does not use a terminator, SCSI will not work properly. Terminator is composed of resistors, located at the end of the SCSI bus, to reduce the mutual influence of the signal, maintain the constant voltage on the SCSI chain.

Most of the SCSI devices have built-in terminators and use a jumper to control on / off. The SCSI device is highly intelligent and can automatically control the terminator on / off. For example, if a hard disk is connected to a CD-ROM, the CD-ROM can work normally regardless of whether the terminator of the hard disk is on or off. However, when two hard disks are connected, the situation becomes more complicated. Before two Seagate hard disks are connected, one hard disk terminator must be off. Before a Seagate hard disk is connected to a quantum hard disk, a hard disk terminator can work normally regardless of whether it is on or off.

SCSI-90°DIP Section

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