Variable Message Sign (VMS) Light Emitting Diodes (LEDs) have found a permanent home in traffic VMS (Variable Message Sign) applications. After a somewhat auspicious start in the 1980's, LEDs have become the preferred VMS light source for the new millenium. Virtually maintenance free, LEDs offer numerous advantages over other VMS options available today. The first commercia...
The "flip" of flip chip is compared with the traditional way of wire bonding connection from the perspective of the process and technology. Traditionally, the electrical surface of the chip is up towards, but flip chip is down towards, so called "flip chip". The essence of flip chip is on the basis of traditional craft, design chip light-emitting area and electrode area into different places,...
This technical article analyzes twelve questions of high power LED during its application.1. Chromatic aberration Individual LED basically has no chromatic aberration problem, however, if there are a lot of LEDs being put into use, or a lamp with multiple LEDs at the same time, the problem will appear. Although like LUXEON will divide LED by the color temperature into eight major militar...
Nowadays, LED lighting becomes more and more popular. Whether for under-cabinet lighting at kitchen, wardrobe lighting, home theater, advertising display or ambient mood lighting etc., SMD LED is a good choice.SMD LED gives high brightness while it has lower power consumption than of a normal LED light tubes (e.g. dip led) and traditional light bulbs. See its features below:Small Size:SMD LED ligh...
The data detected of a single LED white light on the aging board must have some difference from the one detected after a white-light-LED-lamp aging. The size of the differences depends on the LED work electrical parameters and the design of lamps and lanterns, as well as the environment of the lamps and lanterns application. The quality of LED guide plate This is important. t...
This technical article introduces the withstand voltage knowledge and some related solutions. High-voltage insulation test and breakdown test Passing pressure test can only explain that the insulation structure of the product can withstand the test voltage, but cannot indicate how much it can take. If you need to measure insulating strength for research and electrical equipment designing, you need...
White LEDs need 3.6VDC and use approximately 30 milliamps of current, a power dissipation of 100 milliwatts. The positive power is applied to one side of the LED semiconductor through a lead (1 anode) and a whisker (4). The other side of the semiconductor is attached to the top of the anvil (7) that is the negative power lead (2 cathode). It is the chemical makeup of the LED semiconducto...
The use of LED under four different wavelengths:1. UV LED(UV LED) (1) Low UV: 250 nm - 265 nm - 285 nm - 365 nm, now 250 nm to 410 nm. These are the INGaN/GaN carbide materials. The ultraviolet can kill all bacteria in water, and the lethality could reach 98%, especially the 285 nm. (2) Medium UV light: 365 nm - 370 nm is international general. UV brings damages, so usual...
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