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Are displays classified by imaging technology, backlight, characteristics and classification?

Blaze Display Technology Co., Ltd. | Updated: Nov 27, 2018

1. CRT display

CRT display is a display that uses a cathode ray tube .The cathode ray tube is mainly composed of 5 parts: electron gun, deflection coil, shadow mask, phosphor layer, glass and shell group.
In addition, the picture tube, which is an important part of CRT display, is divided into cylindrical tube and flat tube.
Among them, the cylindrical tube is curved in the horizontal direction, and flat in the vertical direction, which is characterized by high brightness and colorful colors.
Pure flat tube realizes a true plane in both the horizontal and vertical directions. Because the design can make the human eye look at the screen.
The focus range is increased, and the distortion reflection is reduced to a minimum, so it looks more comfortable and realistic.
At present, CRT monitors have withdrawn from the mainstream market due to their large size and radiation, but they are still used in some special industries.
2, LCD display
LCD display (liquid crystal display) is mainly composed of two parts: liquid panel and backlight module. Among them, the role of the backlight module is to provide a light source to illuminate the liquid crystal panel, and the liquid crystal panel displays various patterns and colors on the screen by selecting the light surface emitted by the light module.
LCD display has the advantages of thin body, small footprint, and small radiation, giving people the image of a healthy product. But the actual situation is not the case, the use of LCD screens may not be able to protect the eyes, it depends on the habits of everyone using the computer.
3, PDP plasma display
The English from the display is Plasma Display Panel (PDP). A plasma display is a display device that uses gas discharge to cause phosphors to emit light and perform imaging.
Plasma displays have the advantages of large screen resolution, ultra-thin, rich and bright colors, high contrast, large viewing angles and rich interfaces.
The disadvantage is that the production cost is higher and the power consumption is higher. It is rarely seen in the field of computer monitors.
4, LED display
LED (ie, light emitting diode, the English abbreviation of light emitting diode, LED) is a display screen that displays text, graphics, images, animation, market quotation, video, video signals and other information by controlling the display mode of semiconductor light emitting diodes.
LED liquid crystal display gradually replaced the old LCD liquid crystal products with its uniform light emission, stable high brightness, wider color gamut, wider viewing angle, thinner and slimmer, more energy-saving and environmentally friendly, and longer lifespan, and ended the CRT display. Currently, LED displays have become mainstream displays.
5, 3D display
3D displays have always been recognized as the ultimate dream of display technology development. A traditional 3D movie has two sets of images on the screen (from two cameras that are at an angle to each other during shooting). The audience must use a polarizer to eliminate ghost images and allow one eye to see only two sets of images), forming Parallax creates a three-dimensional effect. Two stereoscopic display technology systems that require and do not need to wear three-dimensional glasses have been developed.
The working principle of the backlight is to change the point light of the backlight into the form of surface light
LED backlight applications and LCD screens are divided into side-light type and direct-light type (bottom backlight) according to the location of the light source.
1. Side-light type: the linear light or point light source is set on the side of a specially designed light guide plate to form a backlight, which can be designed as a double-sided or three-sided according to actual application requirements.
The advantage of the side backlight is that it can be made very thin, but the disadvantage is that the utilization of the light source is very low, and the thinner the utilization, the lower the utilization
2. Bottom backlight type: It is a flat panel backlight with a certain structure, which can be a continuous and uniform surface light source (such as: EL or flat fluorescent lamp), or it can be composed of more point light sources (such as dot matrix LED or incandescent lamp backlight board, etc.).
The advantages of the bottom backlight are good brightness and uniformity, but the disadvantage is that it is thick, uses more LED lights, and generates more heat. It is generally used for low-brightness designs. The high-brightness cost is basically not considered.

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