Table des matières
When it comes to LED display, led lamp is the most important, and expensive component. During the development, now it has several different led lamp technology in the market. From the new to the old, it has MIP, COB, GOB, SMD and DIP. Different technology has a different applications. You can see the chart below.
| Type | Feature | solution | application |
| MIP | Micro led in package | Used in 4 in 1 led lmap package, stronger in mounting on the PCB. | Used in pixel pitch from 0.4-2.6mm |
| COB | Chip on board | RGB chip directly mount on the pcb board, made mini and micro pixel pitch possible | Used in pixel pitch from 0.3-1.875mm |
| GOB | Glue on board | Put glue on the SMD surface, better protect the SMD led board from water, dust and moist | Used in pixel pitch from 1.25 – 2.6mm |
| SMD | Surface mount device | Still the most popular led screen pixel solution | Used in pixel pitch from 1.25 – 15.6mm |
| DIP | Dual in-line package | Still used in big pixel pitch outdoor application | Used in pixel pitch above 15.6mm |
Mip is the newest led lamp technology, it means Micro in package which is a technology that we put the micro led chip in package. As the pixel pitch of the led screen become smaller and smaller, hence the led chip also become smaller and smaller. in the normal package of the SMD, it has a package limitation of around 1mm x 1mm, as when the package size is less than 1mm x 1mm, the soldering is not strong enough for the lamp to hold in the PCB. and MIP is a technology, that we can make those small led chip 4 series of RGB lamp packed within one package, hence this 4 lamp would have a bigger package which can have a better soldering on the PCB which means it has a better ability in handling impact. It is a compromise between SMD and COB as in the first place, as COB is very expensive.
COB means chip on board, that the led chip would directly fixed on the PCB. It has flip COB, and normal COB. Now the price of the COB has decreased a lot, and the COB technology is the trend of the led display’s application.
As Cob’s led chip is directly mounted on the PCB, and a glue layer is applied on the PCB, which gives it many benefits.
1: unafraid of impact, and scratches. less dead lamp rate
2: unafraid of dust, no dust would get inside to ruin the circuit
3: unafraid of water and moist. as it has a glue on the top, which make the led board surface IP65 rated.
GOB means Glue on board, Actually it is still SMD lamp, but we would cover the led boards surface with glue, so that the led lamp is full covered from air, dust and moist, which protect the led lamp better.
SMD means surface mount device. Currently this is still the most used led lamp type, due to its easy to design, and use, and also have many suppliers. and the specs can have a very wide selection.
DIP means Dual in-line package, it is a early led lamp package type. which is used in early led display. Nowdays, only some of the outdoor led display still use DIP led lamp. It has a benifts of high brightness and longer life span, but a narrow viewing angle.
Why we need to use the same batch led lamp?
When you decide to add more led screens to your current led display stock, the sales would always warn you that the new led screen can not mix use with the old led screen due to color difference, even though that you brought the old led screen not long ago. Why is that?
The reason is that we produce the led screen based on orders, and we purchase the led lamp fr0m the supplier, and the led lamp is produced by batches. Normally the led lamp factory produce the led lamp on a reguraly basis ( depending on the orders too), for example, producing one batch led lamp for two days. hence it is hard to get the same batch led lamp even after a short time.
Different batch led lamp would have color and brightness difference, which would result color and brightness difference on the led display if mix used. Below is a led lamp specs on different batches. You can see the Red lamp, Green lamp and Blue lamp’s wavelength have slightly difference. Though its brightness is similar, but as the wavelength is different, which would cause color difference
Here below is a example of using different batch led lamp splicing in one screen, you can see the color difference very clearly.
LED lamp supplier introduction
When you decide to buy a led screen, normally the sales would ask you, do you have a perfer led brand. As led lamp takes up the biggest budget in led screen, different led brand would have a huge price difference. Below is a introduce of the popular led lamp manufacturer.
1：NICHIA
Nichia Corporation is a Japanese chemical engineering and manufacturing company headquartered in Anan, Japan with global subsidiaries. It specializes in the manufacturing and distribution of phosphors, including light-emitting diodes (LEDs), laser diodes, battery materials, and calcium chloride.
Nichia’s led lamp has very good quality, but the price is very expensive, and now only some high end product is still using Nichia led lamp.
2:Cree 
Founded in 1987, Cree LED began with a focus on semiconductor materials and fueled the adoption of blue LED die in automotive and display backlighting applications.
Throughout the 1990s we further refined LED technology and became a leading innovator in the space. Cree LED accelerated the LED Lighting Revolution in 2006 with the launch of the industry’s first packaged lighting-class LED, the XLamp® XR-E LED.
Ever since, we’ve driven innovation that has established LEDs as the primary illumination technology used in general lighting and large video display applications. Today, we continue to expand and innovate with best-in-class LED solutions.
Cree’s led lamp is expensive, normally used in high end projects.
3: Muti-Color 
Founded in 2009, Muti-color is a company specializing in designing and producing LED lamps. Aiming to produce high-end led lamps. Well known for its four in one led lamp.
The lamp price is expensive, normally used in high end project that in need of high color gamut, and narrow color consistency.
4: Nationstar 
NATIONSTAR is a National level key high-tech enterprise with professional capability in manufacturing LED components and LED application products. The enterprise’s production bases cover total area is 92,600㎡, while workshops and offices building area is 199,000㎡. NATIONSTAR was founded in 1969 and started LED production in 1976.
Nationstar is currently the most popular led lamp in the market, it is well known for its high quality and reasonable price. It has a wide product range, from indoor to outdoor led display market.
5: Kinglight 
In the semiconductor device domain, Kinglight covers a spectrum of categories including optoelectronic transistors, Schmitt triggers, controllable silicon optocouplers, high-speed isolation amplifier optocouplers, PhotoMos SSR optocouplers, IGBT isolation drives, IPM interface isolation high-speed optocouplers, and linear optocouplers. These products find applications in various industries, including new energy vehicles, energy storage inverter frequency conversion, servo industrial control, industrial automation, 5G communication, power grids, home appliances, and security.
Kinglight is also a well-known led lamp brand among customers. It is normally used to compare with Nationstar, but with cheaper price than Nationstar.
6:Sintopto 
Hubei Xinying Optoelectronics Co., Ltd. is located in the national level Gedian Economic and Technological Development Zone in Hubei, adjacent to the Wuhan East Lake National Independent Innovation Demonstration Zone, and a 3-minute drive from Gedian South Station on Wuhan Metro Line 11. The project covers an area of approximately 300 acres with a total investment of 4 billion yuan, mainly engaged in the research and development, manufacturing, and sales of fifth generation display devices Mini&Micro&LED.
Sintopto is a relatively new brand, but it gain its reputation very fast, around the same price range as Kinglight, but the led lamp details treatment is better than Kinglight.
7: Xinda
Fujian xinda photoelectric technology co., Ltd. (hereinafter referred to as “fujian xinda photoelectric”) is an important part of Xiamen Xindeco Ltd. (stock code: 000701), a stateowned listed company.Founded in 2013, with a registered capital of 150 million yuan, the company is located in quanzhou (hutou) photoelectric industrial park, with a planned total construction area of more than 200,000 square meters.Up to now, it has invested more than 1 billion yuan in total, and has completed the construction of more than 80,000 square meters of production workshop (phase I). It has a super clean, antistatic modern dustfree workshop, advanced fully automated packaging production equipment and perfect testing equipment.Is a set of research and development, production, sales of LED (white light, display screen) packaging and application products as one of the high-tech enterprises, product sales ranks in the forefront of the domestic.
Xinda led lamp is an old led lamp brand, Price is cheaper than Kinglight.
There still have many led brand that did not list here, But the ones above are the most popular led brand. If you do not have much experience in using led screen. Then Nationstar, Kinglight, and Sintopto can be a good choice to start.
