If you’ve gone green, then you probably have those curly-cue compact florescent light bulbs hanging from your fixtures. That’s wonderful. But what if I told you that there was a new bulb in town that may one day tell CFLs, “C U L8R?” Advantages of LED Light Bulbs
The new bulb on the block is the [...]
Full-color LED video display screen has become popular in recent years for various applications such as indoor/outdoor commercial advertisement, stadium billboards, traffic message signs…etc. Thanks to the evolution of LED technology which enables lower cost, higher luminance, uniform wave-length and better efficacy LEDs available, the LED display screen makers are able to build high quality [...]
Encapsulation is generally adopted in packaging of lamp-LEDs. The encapsulation procedure is to pour liquid epoxy into the LED moulding chamber first, and then insert the LED bracket that has undergone the press welding, then put the mould into the oven, and the LED gets shaped when the epoxy solidifies.
The procedure of encapsulation sounds rather [...]
QFN Packaging Solves The Heat Dissipation Problem of LED Display
Currently, almost all LED display manufacturers face the problem of heat dissipation during PCB design, with the thermal effect of drivers disturbing the normal light emitting property of LED and further influencing the color uniformity of the overall display. This article will illustrate how headaches can [...]
LED digital display is a semi-conductive lighting component, with light emitting diode (LED) as its elementary unit. By the number of segments the digital display is made of, there are 7-segment digital displays and 8-segment ones, with the latter with one more LED unit (also displays one more decimal point) than the former. By the [...]
The thermal resistance of a material is its resistance against thermal conduction. The unit of thermal resistance is degree per watt, representing the temperature difference across a structure when a unit of heat energy flows through it in a unit time. After the LED is lighted and the thermal conduction stabled, as every watt of [...]
Silicon carbide is also called “emery powder” or “refractory sand.” The usual manufacturing process of SiC is to combine silica sand, tar (or coke), woodchip (and salt when manufacturing green SiC) and other materials in an electric resistance furnace at a high temperature. Silicon carbide is usually divided into two categories, the black SiC and [...]
1.Introduction
In recent years, LED lighting efficiency has largely increased from 35lm/W (2006) to 100lm/W (Q1′2009). Judging from the increasing LED efficiency, LED products are expected to replace traditional lighting, especially in high power consumption products. Due to the extensive lighting market, there are various new market entrants in the recent years. However, the quality of [...]
Foreword AC responses of LED drivers are critical but usually ignored in LED display applications. AC responses affect the major performance of LED display panels, such as grayscales, linearity, EMI, and reliability. Although there is trade-off within these requirements, LED drivers can provide balance. This article will further explain the importance of the AC responses [...]
The structure of modern automobile lamps is becoming more and more complicated, at the same time the function is being improved gradually. The development of automobile lamps has experienced four stages.
The first generation of automotive light source is fuels (candles, coal oil or acetylene). These fuels burn to emit lights. Fuels can only satisfy the [...]