Rebirth of Northern Technology

When Cheng Yongxing and Zhang Yan were discussing, Feng Yan opened the door and walked in. She and Zhang Yan greeted each other.

They have known each other before, and Zhang Yan also takes great care of these little sisters.

The role of Zhang Yan when he first came in was to provide logistical services to the scientific research team. They all left, and she became the leader.

Cheng Yongxing put aside the discussion and arranged things for Feng Yan first.

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LED companies have been improving their technology while expanding production. With the gradual increase in the output of large screens, slowly, the brightness problem becomes serious.

Many customers find the problem only after the big screen is in hand.

Fortunately, due to the relationship of the LED Patent Alliance, the companies have formed a tacit understanding. Like the large LED advertising screen that Optoelectronics has already entered, other homes do not enter at all.

The client has no choice but to pinch his nose to recognize it. But word of mouth has shaken many customers' desire to buy.

Therefore, continuous improvement of brightness is the primary task of large LED screens.

With the continuous advancement of LED technology, the intensity of blue and red light has made substantial progress. The brightness of these two colors of LEDs has been increasing rapidly.

In contrast, green LEDs. The brightness of the green LED has increased, and a bottleneck has appeared.

This is unacceptable for large LED screens. After the brightness of other LEDs increases, more green LEDs must be used for balance, which not only limits the overall brightness, but also increases the cost.

The brightness problem of the green LED is about to be solved.

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"But what can I do?"

Green LEDs were doing optimization work before Feng Yan left.

If there are so many people, the Boy Scouts plus the semiconductor materials major, or even the whole world, will have no obvious progress, and she will not have much confidence.

The improvement of the brightness of LED products requires constant trial and error, which is completely the result of time spent stacking up.

"This time I am going to change my path."

Commercially available LEDs are all based on GaP materials.

This road Cheng Yongxing is unfamiliar, and there is no way to understand what happened inside. But he was going to take another look.

When the blue LED was implemented, the biggest obstacle encountered was that the wavelength of the light wave was too short, which caused its brightness in the visible area to be too low.

The solution to the problem is to continue mixing, which causes the wavelength of the light wave to increase, and finally realizes the blue light.

Now Cheng Yongxing is ready to retake this path and continue to increase the proportion of impurities, that is, the proportion of Indium. Extend the light wave further until it reaches the green light field!

The blue LED becomes a green LED!

Of course, things are easier said than done. The green light this time is actually more difficult than the blue light at the beginning. After all, the blue light was not bright enough, but at least it could be seen.

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This road was historically completed by Yueya in 1994.

But in this time and space, Yueya has fallen into homogenization competition, and has to continue to develop in depth on the blue LED road, and has no time for him to take care of it.

If Cheng Yongxing is patient, logically, as long as you wait another year or two, green LEDs will naturally appear. But in his timetable, there is no such time scale as one year or two years.

Large-screen LEDs must contribute greater financial resources with greater efforts. For LCD strategy, even a few months are precious.

The upgrade process of the large-screen LED cannot be interrupted.

The idea of ​​implementing green LEDs is very clear, and it takes only a few weeks to see the results.

But he just couldn't find this for a few weeks. Things just dragged down day by day.

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"Why don't you go to professionally cooperate with semiconductor materials?"

Feng Yan understood, but he also had new questions.

Cheng Yongxing has no time, but there are many people who have time in school. Especially after the adjustment of faculties and departments, it stands to reason that cooperation should be more convenient.

"It's because of property rights."

The cooperation between the semiconductor materials major and optoelectronics is generally smooth, but it is in the general cooperation.

Blue LEDs, green LEDs, projects of this level cannot be used for cooperation.

The value of green LEDs is too great. In this era, the value of green LEDs is not much lower than that of blue LEDs.

For example, in LED color applications, the ceiling is on the green light.

The reason why LED traffic lights were red and blue lights in the early stage was because of the brightness of the green LEDs.

Why is such a valuable technology not mentioned in later generations?

It is because in the new century, several technological routes have produced breakthroughs.

The InGaN road was finally abandoned by most manufacturers due to cost. As a result, this period of history was sealed in dust.

But Cheng Yongxing only has this one, which is still borrowed from the light of blue LED, otherwise who would have time to study a technology that has been abandoned.

"So, I am doing research as an employee of the LED company?"

"clever!"

In addition, it is also necessary to take precautions when working with semiconductor materials majors.

No one wants to see the situation where pirated green LEDs first appeared on the market. That way, there are some things that can't be justified.

"Okay! Let me go to the laboratory and take a look!"

Feng Yan changed into his clothes and went to understand the situation.

Having been away for more than half a year, her hands are itchy, but at the same time she has a little lack of confidence.

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Feng Yan's luck was good, and he found the feel in a few days. After increasing the proportion of In, the emission spectrum of the LED has a very obvious shift.

Such obvious effects made Feng Yan very happy.

The easy success made Feng Yan become interested in the experiment, and New Year's Day was too late, working overtime to catch up with the LED experiment.

After half a year of ups and downs and independent life, with the accumulation of knowledge, Feng Yan finally came to a key node, that is, according to his ideas, he can experiment independently.

Of course, after doing a lot of experiments, there will be ideas, and things will promote each other in this way.

Xueba is a Xueba, and the trio of fellow villagers who follow Cheng Yongxing the most, still can't do projects independently.

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Cheng Yongxing would come to visit occasionally during his busy schedule. But after seeing it a few times, I was relieved, and completely handed over the green LEDs to Feng Yan.

Now that there are too few people in his hands, Feng Yan's arrival can be regarded as a chance. After all, the status of these classmates in his heart is always different from that of others.

For Feng Yan, this is an important life node, independently completing a world-class scientific research project.

Fortunately, behind her there are even more rebirth endorsements. With the fearless spirit of the newborn calf not afraid of tigers, she bravely shouldered this burden.

If successful, her harvest will be generous, and she will officially start her own name in the LED field.

What blue LEDs will bring to Cheng Yongxing, and green LEDs will bring her.

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With high work enthusiasm, mature technical route, and her talent, Feng Yan began to run wild on the road of InGaN green LED. Rebirth of Northland Technology latest chapter address: https://www.wuxiaspot.com/book/128175.htmlRebirth of Northern Science and Technology Full Text Reading Address: https://www.wuxiaspot.com/read/128175/Rebirth of Northland Technology txt download address: https://www.wuxiaspot.com/down/128175.htmlRebirth of Northland Technology Mobile Reading: https://m.wuxiaspot.com/read/128175/For the convenience of reading next time, you can click \"Favorites\" below to record the reading record of this time (Chapter 382 Green LED), and you can see it next time you open the bookshelf ! If you like "Rebirth of Northland Technology", please recommend this book to your friends (QQ, blog, WeChat, etc.), Thank you for your support! ! (www.wuxiaspot.com)