Human survival cannot be separated from information. As the founder of cybernetics, N. Wiener, said, "To live effectively, there must be sufficient information." People live in society and obtain information from the outside through their eyes, ears, mouth, nose, and body at all times. Among them, visual information accounts for 70%, and the amount of information obtained by the eyes is large, the most accurate and reliable. For example, "seeing at a glance is better than seeing at a hundred" means that the importance of visual information is far greater than others.

Ancient display technology: characterized by simplicity and intuitiveness. The oldest ancient inventions are fire and light. People use fire and light to illuminate, cook, warm, drive away animals, and transmit information. Beacon towers and wolf smoke are both ways of using fire and light to transmit information.

Modern display technology: characterized by the combination of light and electricity, it is the combination of light and modern scientific achievements. Its goals are: clarity, accuracy, real-time, intuitiveness, convenience, energy saving, carrying a large amount of information, color and stereoscopic effects, etc. It is a product of modern scientific development and an important component of modern science and technology.

The basic characteristics of modern technology are to perceive and process various non electric information sources such as sound, light, heat, force, number, atmosphere, etc. through certain sensors and processors, transmit them to display devices, and then process and convert them into information that can be recognized by human vision through display devices. So we call this modern 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, consistent, and easier to transmit and identify. Many pieces of information can be directly represented by numbers, making digital information display another important aspect of information display. From digital display to character display, it uses human specific language and characters for display. This type of display, when combined with digital display, has a wider range of applications and larger usage. At the same time, people also hope to use graphics and images for display, with colorful content that can be moved in real-time and have a three-dimensional effect. These have all been gradually achieved by the end of the 20th century. LCD computing machines, mobile phones, portable computers, semiconductor light-emitting digital tube (LED) display car price meters, large screen advertisements in shopping malls, stock trading display boards in securities exchanges, electronic scales displayed on fluorescent display devices (VFD), household appliances, VCDs, the latest listed flat panel plasma display (PDP) large color TVs, and CRT display color TVs. All kinds of displays from Zero are providing you with various services, and we believe that in the near future, the development of display technology will make greater contributions to humanity.

Prospects of Technology

1、 The working principle of CRT is based on the scanning and excitation of fluorescent powder by electron beam under electron lens modulation to achieve display

lcd

CRT is the longest developing display in history. Its unique performance and mature process have always been mainstream products in display technology. It is driven in an analog manner, and this advantage will not disappear until digital circuits completely replace analog circuits. It has the characteristics of excellent display effect and reliable quality, especially in recent years, CRT has overcome some of its weaknesses from different perspectives through continuous self-renewal, continuously improving its quality performance and overcoming its own shortcomings. The disadvantages of CRT include large space volume, high working voltage, high power consumption, inability to cooperate with large-scale integrated circuits, and soft X-rays affecting health.

2、 The multifaceted development of flat panel displays

Based on the many advantages and disadvantages of CRT mentioned above, 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 the 1970s, various flat panel display devices have emerged like mushrooms after rain.

(1) LCD display device

(2) Electroluminescent displays are making a comeback

(3）LED（lighte emitting diode）

(4) Plasma Display Panel, abbreviated as PDP

(5) Other flat panel display devices

(6) Flat Field Emission Display (FED)

3、 Large screen display

Large screen display has become a major category in display technology. Large screen display is a complex multidisciplinary system. There are several common types:

(1) Projection large screen

(2) Giant tablet display

(3) TV Wall

(4) Rear projection television