• 2022-06-17

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...

• 2022-06-17

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...

• 2022-06-17

Today, white light LED still has the disadvantages of poor uniformity of luminance and short service life of sealing materials, which makes it fail to perform its received advantages. As for requirements level, with its application in mobile phone, car, medical and other fields, white light LED research results have gained more and more attention.   To improve the luminous efficiency of ...

• 2022-06-17

LED packaging technology is mostly developed based on discrete device packaging technology, but there is a lot of particularity. Under normal circumstances, the discrete device of the tube core is sealed in the packaging, whose main role is to protect the tube core and electrical interconnection. And LED encapsulation is to complete the output electric signal and guarantee tube core normal wo...

• 2022-06-17

Recently, media reports about flip chip and extension without packages ELC, CSP, POD technology, which has the possibility to change traditional ones. Actually, flip chip technology has a long history in the semiconductor industry. Philips Lumileds was introduced for the first time in 2006 LED field, and then followed by inversion eutectic technology development, and to the chip packaging, pr...

• 2022-06-17

This technical article introduces the measures to distinguish the quality of LED board.Materials:  1. Panel of LED board: To compete with low price, some LED unit board manufacturer uses cheap flame retardant paper board or single fiber board as the LED PCB circuit board. This is because all-fiberglass PCB is too expensive. It cannot be seen a difference from the beginning, usually ...

• 2022-06-17

This technical article introduces five dimmer control technology of DC power LED.1. Forward current adjustment method The simplest method of adjusting LED current is to change the current resistance which is connected with LED load. Almost all the DC-DC constant current chips have a test current of interface, comparing the detected voltage and chip internal reference voltage to keep curr...

• 2022-06-13

This technical article answers seven questions to help people easily understand LED.1. What is the manufacturing process of LED chip? LED chip manufacturing is mainly to make effective and reliable low ohmic contact electrode and meet the minimum pressure drop and pressure pad, at the same time produce the light as much as possible. P type used in the general contact metal includes AuBe,...