Industrial application

Human beings can't survive without information. For example, N Weiner, the founder of cybernetics, said, "To live effectively, we must have enough information." Living in society, people always get information from the outside through their eyes, ears, mouth and nose, of which visual information accounts for 70%, and the information obtained by their eyes is large, the most accurate and reliable, such as "Seeing at a glance is not worth seeing."

Ancient display technology: It is characterized by simplicity and intuition. The oldest ancient inventions are fire and light. People use fire and light to illuminate, cook, keep warm and drive away animals and transmit information, etc. Beacon towers and wolf smoke are both ways to transmit information with fire and light.
Advanced display technology: It is characterized by the combination of light and electricity, and the combination of light and modern scientific achievements. Its goals are: clarity, accuracy, real-time, intuition, convenience, energy saving, large amount of information, color and three-dimensional, etc. It is the product of modern scientific development and an important part of modern science and technology.
The basic characteristics of modern technology: all kinds of non-electric information, such as sound, light, heat, force, number and atmosphere, are sensed and processed by a certain sensor \ processor, transmitted to the display device, then processed and converted by the display device, and finally converted into information recognizable by human vision. Therefore, we call this advanced display technology information display technology.
In information display technology, people have discovered the important role and significance of information digitization. Digitized information is more accurate, identical, and easier to transmit and identify. A lot of information can be directly represented by numbers, so digital information display has become another important content of information display. It has also developed from digital display to character display, which uses human-specific languages and characters for display. This display is more versatile and uses more when combined with digital display. At the same time, People also want to use graphics and images to display, and the displayed content is colorful, and can move in real time and have three-dimensional effects. These have been realized one after another at the end of the twentieth century. LCD computing machines, mobile phones, portable computers, car meters with LED display, large-screen advertisements in shopping malls, stock trading display boards in stock exchanges, electronic scales displayed by fluorescent display devices (VFD), household appliances, VCD, the latest large color TV with flat panel plasma (PDP) display, and the color TV with CRT display. All kinds of displays are doing various services for you, and I believe that the development of display technology will make greater contributions to mankind in the near future.
Prospect of technology
The working principle of CRT is-based on the scanning and excitation of phosphor by electron beam under the modulation of electronic lens to realize display.
liquid-crystal display
CRT is a display with the longest development history. Its special performance and mature technology have always been the mainstream product in display technology. It is driven by analog, and this advantage will not disappear until digital circuits completely replace analog circuits. It has its own characteristics: good display effect and reliable quality. Especially in recent years, CRT has overcome some of its own weaknesses from different angles through continuous self-renewal, and its quality and performance have been continuously improved, and its own shortcomings have been continuously overcome.
Second, the multi-faceted development of flat panel displays
Based on many advantages and disadvantages of CRT, people have been pursuing a flat panel display device that has all the advantages of CRT and can overcome all the disadvantages of CRT. Since 1970s, various flat panel display devices have sprung up one after another.
(1) Liquid crystal display device
(2) Electroluminescent display has made a comeback.
(3)LED(Lighte Emitting Diode)
(4) PlasmaDisplay Panel is called PDP for short.
(5) Other flat panel display devices
(6) Flat field emission display (FED) for short.
Three \ big screen display
Large-screen display is already a big category of display technology. Large-screen display is a complex system with multiple disciplines. The common ones are as follows:
(1) projection screen
(2) Giant flat panel display
(3) TV wall
(4) rear projection TV