Chapter 765 TN-LCD
Just after Tang Shaohui came over and reported on the matter of polysilicon solar cells, Gao Zhendong began to think about the focus of his recent work.

He went to the Defense Work Committee and asked for a schedule of projects in which he had participated or suggested.

Coincidentally, the Defense Work Committee had just made a related summary report not long ago. When the leader of the Defense Work Committee heard that Gao Zhendong was concerned about this matter, he immediately sent someone over and gave him an oral explanation in front of Gao Zhendong. He took the list and explained each item in great detail.

The reason why we didn't send an email directly was mainly because although these things do not go into in-depth details, they can fully reveal the current development direction and all-domain combat capabilities of the troops and even for a long time. Compared with the progress and technology of a specific project, this kind of information is more sensitive.

Anyway, Gao Zhendong just wanted to understand the general situation and have a rough idea of ​​it. He didn't want to fully participate in the specific work of each equipment. He didn't have the time. Gao Zhendong's good steel should be used at the critical points when problems occurred.

So the Defense Work Committee simply sent someone over to communicate face to face.

Gao Zhendong was very satisfied with the items on the list. None of the equipment on the list existed at this point in his previous life. As long as these things go according to plan, he believes that many things can be changed. Now, he wants to make some efforts in improving people's livelihood.

After seeing off the comrades from the Defense Work Committee, Gao Zhendong once again set his sights on the information sent by Lou Shouxing, which was the information about the LCD monitor he bought from the Citigroup guy.

This thing has little to do with our livelihood, but it can earn other people's money to improve our livelihood, saving the country in a roundabout way. Gao Zhendong didn't know where to start for a while, so he decided to solve the things on hand first, and then go back to the Defense Work Committee and ask them to help him find some relevant statistical data before considering it.

After getting this set of stuff back, Gao Zhendong was busy with various New Year affairs. In addition, Lou Xiaoe was pregnant, so he didn't have much time to look at this thing. Anyway, this thing was not particularly urgent.

After carefully looking at the situation of the LCD display, Gao Zhendong finally understood why RCA got up so early and arrived late, and even sold the patent. After all, there were many senior technical personnel in RCA, and it was impossible for all of them to be stupid.

Because from the current state, this thing is simply unusable.

The viewing angle is small, it cannot emit light by itself, and can only display in black and white. It has poor support for grayscale display. RCA is not aware of the need for a dithering algorithm to optimize the grayscale display at this stage. At the same time, the contrast cannot support multi-line display, and the effect of dozens of lines is very poor.

Moreover, the liquid crystal material used is unstable, so the display screen is also unstable. Not to mention the high-resolution colors of the future, even the simple display that supports calculators seems a bit unreliable.

Looking at this thing, Gao Zhendong shook his head. No wonder in their previous life, it took them until 68 to produce the first proper LCD screen, and it was not stable yet. It was not until 73 that it could truly support formal mass production and shipment. As for what happened in between, Gao Zhendong roughly knew it.

He has to solve this problem now.

After searching in the system, he found out that he really didn't remember this thing, but he did save the relevant information.

Looking at the information he searched for, Gao Zhendong picked up the phone and called Xiang Gong, who was engaged in chemistry, again.

Engineer Xiang was a little happy when he received Gao Zhendong's call. It had only been a short time since I sent the book out. Could it be that Chief Engineer Gao had already produced results? It must be said that Chief Engineer Xiang was a little superstitious.

"Chief Engineer Gao, do you want to confirm whether 4'-dioxybiphenyl can be synthesized now?"

Gao Zhendong was very sure on the phone: "Yes, it doesn't have to be a mature process, as long as it can be synthesized."

"I'm not into this. Let me email my classmates and colleagues to ask about the situation. I'll get news within half a day." Thanks to email, communication is now much more efficient.

Mr. Xiang kept his word and called back that afternoon.

"I have a classmate who has occasionally synthesized it as an intermediate product, but this thing seems to be useless now and has not been studied in depth. If you need it, I can ask him to synthesize some of it for you. How much do you need?" Mr. Xiang was very happy to be able to help Gao Zhendong.

However, Gao Zhendong's answer made him a little confused: "Has it been synthesized? That's great! We don't need it for now. I just want to confirm whether this thing can be synthesized! Thank you, Mr. Xiang. I will trouble you again if I need it." For him, it is enough to confirm that the technology exists currently, and the actual materials are not needed for the time being.

After Gao Zhendong expressed his thanks, he hung up the phone in a hurry.

With the confirmed news, Gao Zhendong picked up a pen and directly crossed out all the original liquid crystal material content in the liquid crystal material section of the technical data, and rewrote a few words.

"Liquid crystal material using [4'-dioxybiphenyl (DOB)]."

This is the problem that Gao Zhendong wants to solve. The simplest type of LCD display has a simple structure and is not too difficult to produce. The LCD box, conductive glass substrate, etc. are relatively simple things. The only problem, in fact, has been mainly stuck on one thing for so many years.

——Liquid crystal material.

From 68 to 73, the biggest event in the LCD industry was that Professor Gray of John Bull discovered that biphenyl was very useful in LCD displays. However, there are many types of biphenyl. After reading the searched information, Gao Zhendong chose DOB, which has an advantage of a high melting point and can be used in high-temperature LCDs, solving both room temperature and high temperature problems at once, saving trouble.

After making the selection, what he needs to solve is the problem of its origin. Can this thing be synthesized now?
For him, this thing does not require a mature synthesis process. It is enough to prove that it can be synthesized. The rest can be left to the system.

Now that he had clear information, Gao Zhendong directly modified the relevant technical data of the existing LCD screen.

Then, he opened the system's product page and found a very rare item. After thinking it over, he realized that only this thing could meet the requirements of a "black and white, grayscale, flat panel, array" display.

He also tried to extract a calculator, after all, it had an LCD screen on it, but the result was not very good. He got a "calculator" with an LED digital tube display and C6108 as the core. It was almost the same size as the keyboard in his previous life. Damn!

It seems that a display device is still needed, and the choice of technology and features must be very clever. Color display screens or TVs are not enough. That thing has been mentioned before, and what is produced is a flat-screen CRT big-head TV.

So Gao Zhendong had a lot of trouble finding this thing in the system. If it wasn't near the school, I guess no one would be selling this thing, at least it would basically be impossible to find it in a computer city.

It was a 13.3-inch black and white ink screen display. The ink screen, also known as electronic paper, is a very unique and niche product, usually used in readers. At the same time, for a small number of people with eye problems or who want to protect their eyes as much as possible, there are also display products available for purchase.

Most people will not buy this thing at all. It responds slowly, refreshes slowly, has ghosting, is black and white, and is too expensive! Among consumer-grade monitors, this thing is the most expensive with the same display area. There is almost no other.

But although this thing is magical, it meets Gao Zhendong's requirements very well.

Read the error-free version at 69shuba! 6=9+shu_ba is the first to publish this novel.

Flat panel, display device, black and white, dot matrix, and even grayscale.

Gao Zhendong brought this thing out, as expected.

In front of him was a thin plastic box. A gray 13.3-inch screen took up most of the space on the front of the box. Some cable interfaces were on the side. As for the display interface, the system was lazy again and used the display interface of the DJS series computer that Gao Zhendong had developed.

Although it is said to be thin, it is actually thicker than the original ink screen display, but compared with the current large-head CRT, it can be said to be extremely light and thin.

Gao Zhendong was overjoyed. Hey, this time he had mastered the system quite well.

Get the LCD patent first to avoid being a scapegoat for others.

Then determine the best liquid crystal material and its preparation technology under the current environment. Anyway, for the system, what matters is whether it exists, not how good it is.

As long as you have the technology, it can be realized for you, and at the same time it can be optimized for you, which is very considerate.

When I determined the liquid crystal material as DOB that can be synthesized in liquid crystal technology materials, the system was put into operation.

He happily opened the manual, 8 levels of grayscale, 80*60 resolution...

What? 80*60? What the hell is this! At 13.3 inches, this is not even a resolution, it's just a mosaic display.

Gao Zhendong read the instructions carefully and finally found the problem.

Up to now, the technology he has only supports TN (Twisted Nematic) liquid crystal. A big problem with twisted nematic is that it does not support multiple rows very well. It is not that it cannot be done, but the cost is high and the effect is quite difficult to describe.

So what the system finally produced was a TN LCD display.

After understanding the reason, Gao Zhendong felt relieved. This was not a big problem. TN was TN. It was not unusable. Anyway, it was not realistic for this thing to support video playback under the technical environment at that time. If it was mainly used for instruments, then there would be no problem. This thing had low power consumption. Just think about how long a button battery in an electronic watch can last, and you will know how power-saving this thing is.

As for more advanced ones, just wait, they can always be solved.

Gao Zhendong is very confident about this.

(End of this chapter)