What is a CRT Monitor? How does a CRT monitor work?

CRT (Cathode Ray Tube) is a cathode ray tube. It is a widely used display technology. The CRT projector decomposes the input signal source into the phosphor screen of the three CRT tubes: R (red), G (green) and B (blue), and the luminous signal is amplified and converged under high pressure, and the color image is displayed on the large screen.

The optical system and the CRT tube form the projection tube, and the commonly known three-gun projector is a projector composed of three projection tubes. The image displayed by the CRT projector is rich in color, good reproducibility, and has rich geometric distortion adjustment capabilities; The disadvantages are low brightness, complex operation, large volume, and high requirements for the installation environment.

The unique performance indicators of the two CRT projectors are noteworthy.

Convergence performance Convergence refers to the overlap of red, green, and blue colors on the screen.

For CRT projectors, convergence control is particularly important, because it has three kinds of RGB CRT tubes, which are mounted in parallel on the ground bracket, and in order to achieve complete image convergence, all kinds of image distortion must be corrected. The change of the position of the machine, the convergence should also be readjusted, so the requirements for convergence are one is full function, and the other is convenient and fast. Convergence has static convergence and dynamic convergence, in which dynamic convergence has tilt, bow, amplitude, linear, trapezoidal, pillow and other functions, each of which can be adjusted in both horizontal and vertical directions.

In addition, nonlinear balance, trapezoidal balance, and cushion balance can also be adjusted.

Focusing performance of CRT tubes.

We know that the smallest unit of a graph is a pixel. The smaller the pixels, the higher the graphics resolution. In a CRT tube, the minimum pixel is determined by the focusing performance, and the addressable resolution is the minimum number of pixels.

There are three kinds of focusing mechanisms of CRT tube: electrostatic focusing, magnetic focusing and electromagnetic compound focusing, among which electromagnetic composite focusing is more advanced, and its advantage is that the focusing performance is good, especially under high brightness conditions, it will be defocused, and the focusing accuracy is high, and it can be focused in different regions, edges, and corners, so that every point on the picture is very clear.

The display of the electron ray tube is large and hurts the eyes.

It is a display that uses a cathode ray tube, which is mainly composed of five parts: electron gun, defincy coils, shadow mask, phosphor and glass shell. It is one of the most widely used monitors at present, CRT flat screen display has a large viewing angle, no dead pixels, high color reproduction, uniform chromaticity, adjustable multi-resolution mode, extremely short response time and other advantages that LCD displays are difficult to exceed, and now CRT monitors are much cheaper than LCD displays.

Generally, what we are talking about now is the flat screen display, which is different from the liquid crystal display!

CRT is an ordinary cathode ray display.

A term relative to liquid crystal displays.

It's the kind of big one that was commonly used in desktops in the early days.

Ordinary CRT displays are called CRT displays.

How it works: The CRT display relies on an electron beam to excite the phosphor on the inner surface of the screen to display the image, and since the phosphor is lit and goes out soon after, the electron gun must continuously excite these dots in a cyclic manner. Excited by a high-speed electron beam, these phosphor units emit red, green, and blue light of different intensities, producing rich colors according to the spatial color mixing method.

A CRT monitor is a type of display that uses a cathode ray tube and is usually one of the standard devices for a computer. The bandwidth of a CRT display can be seen as the sum of the number of pixels scanned per second, usually in MHz (megahertz). The higher the screen resolution, the more points need to be scanned, the higher the requirements for the scanning frequency of the electron gun, and therefore the bandwidth needs to be increased.

CRT displays work by excitating phosphors on the inner surface of the screen with an electron beam to display an image. The cathode is heated by the filament, the cathode emits electrons, and then under the action of the electric field of the accelerating pole, it is gathered into a very fine electron beam through the focusing pole, and under the action of the anode high voltage, a huge amount of energy is obtained to bombard the phosphor layer at a very high speed. The phosphor unit is stimulated to produce a rich range of colors.

The CRT display will emit a large number of electrons from the cathode through an electron gun, which will be controlled by intensity, gathered and accelerated to form an electron flow, and then controlled by a deflection coil to quickly bombard the phosphor screen of the display, so that the phosphor on the phosphor screen will shine.

CRT displays are displayed in CRT tubes. CRT displays can be divided into spherical picture tubes, cylindrical picture tubes and flat picture tubes according to the different types of picture tubes.

The CRT display relies on an electron beam to excite the phosphor on the inner surface of the screen to spine the display image, and since the phosphor is lit and goes out soon after, the electron gun must continuously excite these dots.

The scientific name of a CRT display is "cathoderay tube", which is a type of display that uses a cathoderay tube. There are five main components: electrongun, deflectioncoils, shadowmask, high-voltage graphite electrode and phosphor coating and glass shell.

It is one of the most widely used displays, CRT flat screen display has the advantages of large viewing angle, no dead pixels, high color reproduction, uniform chromaticity, adjustable multi-resolution mode, extremely short response time and other advantages that LCD displays are difficult to exceed, and it is cheaper.