Rebirth of Northland Technology

While 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 research team.They all left, and she became a leader.

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

————————

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 companies will not enter at all.

The client has no choice but to pinch his nose to recognize it.However, 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 progress 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 not acceptable for large LED screens.After the brightness of other LEDs increases, more green LEDs must be used for balancing, which not only limits the overall brightness, but also increases the cost.

The brightness problem of the green LED has come to be solved.

————————

"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 only requires constant trial and error, which is completely the result of stacking up with time.

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

Commercially available LEDs are 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 leads to an increase in the wavelength of light waves, and finally blue light.

Now Cheng Yongxing is ready to retake this path and continue to increase the proportion of impurities, which is the proportion of Indium.Lengthen 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.

————————

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 use greater efforts to contribute greater financial resources.For LCD strategy, even a few months are precious.

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

The realization idea of ​​green LED is very clear, and it takes only a few weeks to see the result.

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

————————

"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, it stands to reason that cooperation should be more convenient.

"It's because of property rights."

The cooperation between the major of semiconductor materials and optoelectronics is generally smooth, but it is in 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.Thus, 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 LED company?"

"clever!"

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

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 take a look at the laboratory and say it!"

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

After being away for more than half a year, she felt a little lack of confidence while her hands were itchy.

————————

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 point, 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 like this.

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

————————

During Cheng Yongxing's busy schedule, he would still visit occasionally.But after watching it a few times, I was relieved, and left the green LED stall to Feng Yan.

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

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

Fortunately, behind her was the endorsement of the rebirth who was more against the sky. With the fearless spirit of the newborn calf, she bravely assumed this burden.

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

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

————————

With high work enthusiasm, mature technical route, and her talent, Feng Yan began to run wild on the road of InGaN green LED.