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Home › Tech Column

Tech Column

2057
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Super LED Manufactured by Diamond Islands Wafer-1

Fri, 05/28/2010 - 15:15 — e.yuan
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3194
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A Single Stage Flyback Power Supply Unit for LED lighting Applications

Thu, 05/06/2010 - 17:18 — e.yuan
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7550
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How to choose LED Driver IC?

Tue, 12/29/2009 - 16:27 — ivan
LED has established its unshakable position in the backlighting of portable devices. Even in the backlighting for the large-sized LCD panel, it has started to challenge the mainstream CCFL. In lighting, LED is especially popular in the market due to its highlighted features like energy-efficiency, environmental friendliness, long lifetime, and low maintenance. The driver circuit is a crucial and integral part of the LED. Whether in lighting, backlighting or the display panel, the choice of the technical architecture of the driver circuit must correspond to specific applications. .. Read more
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On the design and key elements of LED streetlights

Fri, 12/18/2009 - 18:47 — ivan
In recent years, cross-strait development of various types of LED streetlights have been booming, particularly in 2008, when Taiwan and China both initiated several LED streetlight demonstration projects, spurring the growth momentum of LED industry. .. Read more
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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 display screen with cheaper cost. .. Read more
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4483
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LED Encapsulation Process

Fri, 07/24/2009 - 10:57 — ivan
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 simple, while the following points should be paid attention to: .. Read more
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3670
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QFN Packaging Solves The Heat Dissipation Problem of LED Display

Thu, 07/09/2009 - 18:19 — ivan
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 be prevented by changing the packaging of driving chips.
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LED Digital Display

Tue, 05/05/2009 - 18:03 — ivan
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 number of the figure “8” displayed, there are 1-digit, 2-digit, 4-digit LED digital displays and so on. And by the way in which the LED units are connected, there are common anode digital displays and common cathode digital displays.
  .. Read more
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5568
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On Factors Influencing Thermal Resistance of LED Components

Wed, 03/18/2009 - 10:15 — ivan
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 power on the chip surface being consumed, the temperature difference between the PN junction and the linking bracket or heating panel is the thermal resistance value of the LED. .. Read more
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