Chapter 195: Printing

"According to the current progress, as long as there are no accidents in R&D, the new plant can be put into use smoothly, and various raw materials and parts meet the requirements, we will be able to put the first batch of products into use around May. ”

Ni Guangnan is mainly engaged in hardware development, at a glance you can see the maturity of the current 6502 computer, with similar foreign mature products as a reference, before and after eight months to complete the development, this can not be regarded as a long time, after all, it is a large number of mature products pieced together.

To have the opportunity to participate in the research and development of the 6502 computer, almost all of them are a little research on the personal computer industry, and the development team of the School of Telecommunications Engineering expected the time to be June 84, but the two are not much different, indicating that this thing is still very optimistic about everyone.

As a technical bull from the Chinese Academy of Sciences, Ni Guangnan can know too many people, this time I saw the entity of the 6502 computer, and all kinds of technical routes are feasible and reliable, he can't wait to introduce this product to a friend of his own.

Also doing research in the Chinese character industry, Ni Guangnan mainly studies how to display Chinese characters on the computer, and now everything has to see the light of day, he naturally wants to think of his old friend Wang Xuan, associate professor of Imperial Capital University, and the developer of domestic laser phototypesetting system.

Compared with traditional lead printing, laser phototypesetting technology is essentially a huge breakthrough technology, relying on this technology alone, it directly pushed Wang Xuan to the throne of academicians, and was even known as the contemporary Bi Sheng, which shows the importance of laser phototypesetting technology.

"The 6502 computer can realize a full set of word processing, but we are not enough to do computer word processing, a document to the end, after all, it is still to be printed on the paper document, so we want to achieve the large-scale practical use of the 6502 computer, a printer that can be directly connected to the computer for text printing, or a Chinese character phototypesetting machine is absolutely indispensable. ”

The computer in the office market is mainly used more widely for printers, as for the Chinese character phototypesetting machine, this thing is also used by large printing units, such as newspapers and publishing houses, which are more or less the target customers of 6502 computers.

Answered: "Printers, now mainly foreign products, we can't make a suitable product for the time being, as for the laser phototypesetting, this should be a project that Professor Wang Xuan of Imperial Capital University is doing, but his technology is to directly take pictures of the paper originals printed out by the computer, and there is a paper document process between this thing and our computer." ”

In a sense, the laser phototypesetting machine needs an image signal, and only the image signal is formed into a laser signal through laser scanning, which can successfully realize the phototypesetting process.

Ni Guangnan obviously understood Wang Zhengguo's thoughts, and knew that someone was not very clear about the printing and phototypesetting technology industry, and as a returnee returning from studying in Canada, he had to introduce some cutting-edge technology.

"Wang Xuan is my good friend, his laser phototypesetting technology is now in the final stage of transforming the technology into a product, I also saw his product last month, the world's top laser phototypesetting technology, used in large-scale printing is absolutely first-class, but I want to introduce another product now, laser printers. ”

Laser printers are developed in laser phototypesetting technology, and there is an electronic printing system similar to laser phototypesetting technology in foreign countries in 77 years, and then there is a laser printer after further development, which is also a IBM3800 type launched by IBM, which is a pioneer in the industry.

After that, the major companies advanced rapidly, and later the famous HP laser printer, probably also developed in the early eighties, has been committed to the electronic Chinese character display, printing technology research and development of Ni Guangnan, he can not care about related technologies abroad.

"The main working principle of the laser printer is not difficult to understand, the binary data information (text information) transmitted by the computer, and then converted into a video image signal, and then the video image signal is converted into a laser driving signal by the video image interface/control system, and the system generates a laser beam carrying character information, and finally the laser beam is imaged and transferred to paper by the electrophotographic system. ”

After listening to so many explanations, Wang Zhengguo understands that the entire process of the laser printer, from the computer document to the finished product, needs to go through binary data information - video image signal - laser driving signal, which requires two signal conversions.

At this time, someone's heart, it is simply a river and sea, never expected that the technology of laser printers has become a compulsory course for him, and he did not plan to intervene in the field, but after listening to the explanation, he immediately changed his mind.

First of all, the video image signal is converted into a laser driving signal, which has a complete technical ability in China, it is Professor Wang Xuan's laser phototypesetting technology, Wang Zhengguo really does not need to repeat the research, but the previous process of the laser printer is interesting: convert binary data information into video image signal.

It is not easy to say that this technology is not simple, not only used in laser printers, but also in the field of digital cameras.

Wang Zhengguo's high hopes for the COMS graphic sensor, after this thing collects the optical signal, it can not be directly converted into an image signal, but first forms binary data information and saves it, and only after these binary data information is processed, can it become the final image signal, that is, the picture displayed on the display screen.

If you just want to make a CMOS pattern sensor, then of course there is no problem, but what you can get is a large amount of binary data, and the later image formation depends on video image processing technology.

There are all kinds of digital camera brands on the upper plane, some of them use the same graphic sensor, but the final output picture color is very different, to say that it is divided into German flavor and Japanese flavor, which are two different imaging algorithm tuning, and Japanese cameras are also divided into different factories, and the style adjustment of various photos is different.

To put it simply, when the same CMOS sensor presses the shutter, it will output a string of binary data, which will be different after passing through different brands of image processors, and this is the time when the test school converts binary data information into video image signal capabilities.

In the future, if you make up your mind to make a digital camera, you must have the ability to convert binary data information into video image signals, and now the facts tell Wang Zhengguo that the technology is definitely very useful, if you want to make a domestic laser printer, the same technology must be made in advance, it is completely killing two birds with one stone!

Fortunately, the laser printer's ability to convert binary data information into video image signals is not high, and it is only necessary to simply make the glyphs, and the text printing era does not need a variety of color data, which is already a reduced level of difficulty compared to digital cameras.