Who invented the monitor? How many monitors are there?

Jun 15, 2022, 5:56:26 AM

With the rapid development of science and technology, the most outstanding invention of this century, the electronic computer, is also making continuous progress.

The inventor of liquid crystal display (LCD), georgeharryhelmyer.

George H. Heilmeier

Heilmeier was born in Philadelphia, Pennsylvania. He graduated from AbrahamLincoln high school. He has been engaged in electrical engineering from the University of Pennsylvania in Philadelphia. He holds MSE, master\'s degree, and doctor\'s degree. He holds a bachelor\'s degree in solid state materials and electronics from Princeton University.

Heilmeier joined the RCA laboratory in Princeton, New Jersey, in 1958, engaged in parameter amplification, tunnel diode down converter, millimeter wave generation, ferroelectric thin film devices, organic semiconductors, and electro-optical effects of molecules and liquid crystals. In 1964, he discovered several new electro-optic effects in liquid crystal, which led to the first working liquid crystal display based on his so-called dynamic scattering mode (DSM).

Heilmeier spent most of the 1970s working for the U.S. Department of defense. From 1970 to 71, he served as a white house researcher and special assistant to the Secretary of defense, and implemented a long-term R & D plan. In 1971, he was appointed assistant director of defense research and engineering, electronic and physical sciences, responsible for all research and exploratory development of electronic and physical sciences. In 1975, he was appointed director of the Defense Advanced Research Projects Agency (DARPA) and worked in stealth aircraft, space-based lasers, space-based infrared technology and artificial intelligence.

In December, 1977, hillmayer left the government to become the vice president of Texas Instruments; In 1983, he was promoted to chief technology officer. From 1991 to 1996, he served as president and CEO of Bellcore (now Telcordia), and was ultimately responsible for the sale of Bellcore to Science Applications International Corporation (SAIC). He served as the chairman and chief executive officer of the company from 1996 to 1997, and later as the honorary chairman of the company.

Heilmeier has won numerous awards, 15 patents, and is a member of the National Academy of engineering, the National Defense Science Council, and the national security agency advisory board. He was a member of the board of directors of Fidelity Investments and TeleTech holdings, and a supervisor of the school of engineering and Applied Sciences at the University of Pennsylvania. He died of a stroke in 2014.


LED display

The displays are roughly classified as follows:

1. CRT display

It is a display using a cathode ray tube. The cathode ray tube is mainly composed of five parts: electron gun, deflection coils, shadow mask, phosphor layer and glass shell. It is one of the most widely used displays. CRT flat panel displays have the advantages that LCD displays cannot surpass, such as large viewing angle, no bad points, high color reduction, uniform chromaticity, adjustable multi-resolution mode, and extremely short response time. Moreover, CRT displays are much cheaper than LCD displays. According to different standards, CRT displays can be divided into different types.

2. LCD display

LCD display is liquid crystal display, which has the advantages of thin body, small land occupation and small radiation, giving people the image of a healthy product. However, the actual situation is not the case. The use of LCD may not protect the eyes, which depends on the habit of using computers.

3. LED display

LED is the abbreviation of light emitting diode (LED). It is a display screen used to display text, graphics, images, animation, market, video, video signals and other information by controlling the display mode of semiconductor light-emitting diodes.

4. 3D display

3D display has been recognized as the ultimate dream of display technology development. Over the years, many enterprises and research institutions have engaged in this research. Japan, Europe and the United States, South Korea and other developed countries and regions have been involved in the research and development of stereoscopic display technology since the 1980s. In the 1990s, they began to obtain different degrees of research results. Now they have developed two stereoscopic display technology systems that need to wear stereoscopic glasses and do not need to wear stereoscopic glasses. Traditional 3D movies have two sets of images on the screen (from two cameras at an angle to each other when shooting). The audience must wear polarizers to eliminate ghosting (let one eye receive only one set of images), form parallax, and produce a three-dimensional feeling.