LED Display Material FAQ - The difference between different brands led
The differences between AXT , COTCO CREE LED are showed on the below four aspects :
1. Brightness difference. For example, P20mm outdoor full color AXT screen can reach 5000 NITS , but the same spec COTCO CREE display can reach 5500 NITS.
2. Antistatic electricity ability. AXT LEDS will be broken some during the producing process(it can only withstand 300V human static electricity), but COTCO CREE has a good ability to protect themselves from it( It can withstand 1000V human static electricity), only 1~3 pcs LED broken during the producing process. Also this can influence the LED life.
3. Brightness Decrease, AXT led will lower about 20% in 1000 hours. But COTCO CREE led will lower only about 5% .
4. Life, AXT LED life is about 8 year, COTCO LED is about 10 years or more.
LED Display Material FAQ-CREE and COTCO
After a serial cooperation in different product and technology field, America "CREE" reorganized HongKong "COTCO" with a price of 200 million USD in 12th Mar, 2007. Actually "COTCO" had been one of the customers of "CREE", because they purchased "CREE" LED chip and did the encapsulation part. For the reason of higher technology level, the LED encapsulated by "COTCO" performed better characteristic than LED from other encapsulation companies in China mainland, even for the same "CREE" chip. So that's the reason why once there had been "COTCO" and "CREE" LED in the solution. But since 18th Feb, 2008, the name "COTCO" has been changed formally to "CREE". After this reorganization, "CREE" improved greatly the brightness and other performance with the new technology. Only that sometimes people are used to call "COTCO".
But as for LED display industry, it's important to know that in market, "CREE" LED exists in two types: the original "CREE" LED with "COTCO" advanced tech; the "CREE" LED encapsulated by other mainland companies. Original "CREE" performs higher quality and with higher price.
Conclusion: "Silan" has taken the place of "AXT" as in LED display industry. "COTCO" now usually is called "CREE-COTCO" or "Original CREE". "NICHIA" remains the top solution. Generally speaking, there are only above 3 LED for Average, Middle, Top options.
LED Display Material FAQ-SILAN and AXT
As a LED display businessman, you must pay great attention to the material that manufacturers choose. And you may have questions on the SILAN LED and AXT LED. Here we'd like to give a brief introduction as below, and hope it would be helpful:
Actually USA "AXT" LED chip not exists now, instead of which is "LUMEI" LED chip in Dalian, China. Invested by "Luming" Group which established in 1992, "Lumei Opto" Corp was found in 2003. The America "AXT" LED was once famous in industry, but in 2004 it was reorganized by "Lumei". In another word, it belongs to "Lumei", together with the related heart technology patents and the teams. Or simply speaking, Dalian "LUMEI" LED was once the America "AXT" LED. Only that sometimes people are used to call "AXT".
But here's the more important point as for LED display industry: Just before 2008, "AXT" had been greatly used in LED display panel. But as an economic solution, "AXT" had once very serious quality problems, and nowadays almost all the LED display manufacturers turn to "Silan" for the economic solution. "Silan" performs better in high brightness and the reliability especially blue and green color LED.
The differences between AXT , COTCO CREE LED are showed on the below four aspects :
1. Brightness difference. For example, P20mm outdoor full color AXT screen can reach 5000 NITS , but the same spec COTCO CREE display can reach 5500 NITS.
2. Antistatic electricity ability. AXT LEDS will be broken some during the producing process(it can only withstand 300V human static electricity), but COTCO CREE has a good ability to protect themselves from it( It can withstand 1000V human static electricity), only 1~3 pcs LED broken during the producing process. Also this can influence the LED life.
3. Brightness Decrease, AXT led will lower about 20% in 1000 hours. But COTCO CREE led will lower only about 5% .
4. Life, AXT LED life is about 8 year, COTCO LED is about 10 years or more.
LED Display Material FAQ-CREE and COTCO
After a serial cooperation in different product and technology field, America "CREE" reorganized HongKong "COTCO" with a price of 200 million USD in 12th Mar, 2007. Actually "COTCO" had been one of the customers of "CREE", because they purchased "CREE" LED chip and did the encapsulation part. For the reason of higher technology level, the LED encapsulated by "COTCO" performed better characteristic than LED from other encapsulation companies in China mainland, even for the same "CREE" chip. So that's the reason why once there had been "COTCO" and "CREE" LED in the solution. But since 18th Feb, 2008, the name "COTCO" has been changed formally to "CREE". After this reorganization, "CREE" improved greatly the brightness and other performance with the new technology. Only that sometimes people are used to call "COTCO".
But as for LED display industry, it's important to know that in market, "CREE" LED exists in two types: the original "CREE" LED with "COTCO" advanced tech; the "CREE" LED encapsulated by other mainland companies. Original "CREE" performs higher quality and with higher price.
Conclusion: "Silan" has taken the place of "AXT" as in LED display industry. "COTCO" now usually is called "CREE-COTCO" or "Original CREE". "NICHIA" remains the top solution. Generally speaking, there are only above 3 LED for Average, Middle, Top options.
LED Display Material FAQ-SILAN and AXT
As a LED display businessman, you must pay great attention to the material that manufacturers choose. And you may have questions on the SILAN LED and AXT LED. Here we'd like to give a brief introduction as below, and hope it would be helpful:
Actually USA "AXT" LED chip not exists now, instead of which is "LUMEI" LED chip in Dalian, China. Invested by "Luming" Group which established in 1992, "Lumei Opto" Corp was found in 2003. The America "AXT" LED was once famous in industry, but in 2004 it was reorganized by "Lumei". In another word, it belongs to "Lumei", together with the related heart technology patents and the teams. Or simply speaking, Dalian "LUMEI" LED was once the America "AXT" LED. Only that sometimes people are used to call "AXT".
But here's the more important point as for LED display industry: Just before 2008, "AXT" had been greatly used in LED display panel. But as an economic solution, "AXT" had once very serious quality problems, and nowadays almost all the LED display manufacturers turn to "Silan" for the economic solution. "Silan" performs better in high brightness and the reliability especially blue and green color LED.
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