General terms of led display video wall: such as pixels, pixel pitch, SMD led display, DIP led panel, rental led display, fixed led wall, stage events led display etc., The following is a summary of the professional terms of LED electronic screen.
(1) What is a pixel? Pixel diameter? And dot pitch pixels?
A pixel is a light-emitting unit of each LED electronic screen that can be controlled individually, and is the smallest light-emitting unit of the LED electronic screen.
Pixel diameter refers to the diameter of each LED light-emitting pixel, in millimeters.
The pixel pitch is the center distance between the two pixels of the LED electronic screen, which is called the pixel pitch, also known as the dot pitch. The denser the dot pitch, the higher the pixel density per unit area, the higher the resolution, and the higher the cost. The smaller the pixel diameter, the smaller the dot pitch.
(2) What is an LED display module?
The LED display module is composed of several display pixels, which is structurally independent and can constitute the smallest unit of the LED electronic screen.
(3) What is a cell board?
The unit board is the main component unit of the electronic screen, which is composed of luminescent materials and driving circuits. The indoor screen is usually composed of the unit board.
(4) What is a module?
The module is the smallest display unit of the outdoor electronic screen. It is composed of a number of light-emitting diodes in a fixed order, encapsulated in a fixed mold shell by welding, encapsulating and other processes, and becomes a module.
(5) What is a unit cabinet?
The unit box is the main component unit of the electronic screen, which is composed of the unit boards in a certain order. The outdoor screen is usually composed of the unit box.
(6) What is DIP?
DIP packaging is an abbreviation of dual inline-pin package, also called dual in-line packaging technology. Dual in-line packaging is an integrated circuit chip packaged in a dual in-line package. Most small and medium-sized integrated circuits use this A variety of packaging forms, the number of pins generally does not exceed 100, can easily achieve the through-hole welding of PCB board, and has good compatibility with the main board, mainly used for indoor full-color screen
(7) What is SMD?
SMD is a surface mounted device (abbreviation for surface mounted device), which is characterized by high assembly density, small size and light weight of electronic products, and the volume and weight of chip components are only about 1/10 of traditional plug-in components, used indoors The full-color electronic screen can realize single-point maintenance and effectively overcome the mosaic phenomenon.
(8) What is a lamp insertion module?
The lamp insertion module refers to the DIP-encapsulated lamp passing the lamp foot through the PCB board and filling the lamp hole with solder. The module made by this process is the lamp insertion module. The advantages are: high brightness and heat dissipation Good, the disadvantage is: the pixel density is small
(9) What is a surface mount module?
The surface mount is also called SMT. The SMT packaged lamp is welded to the surface of the PCB board by a welding process. The lamp pin does not need to pass through the PCB board. The module made by this process is called a surface mount module. The pixel density is large, suitable for indoor viewing; the disadvantage is that the brightness is not high enough, and the heat dissipation of the lamp itself is not good enough.
(10) What is a sub-surface stick module?
Sub-Surface Mount is a product between DIP and SMT. Its LED lamp packaging surface is the same as SMT, but its positive and negative level pins are the same as DIP. It is also soldered through the PCB during production. The advantages are: high brightness, good display effect, the disadvantages are: complex process, difficult maintenance
(11) What is three in one?
Three-in-one refers to vertically aligning SMT lamps with three different colors of RGB LED chips at a certain pitch; advantages of three-in-one: good effect; disadvantages: complicated process, difficult maintenance; high cost.
(12) What is three in one?
It is to vertically align the three independently packaged SMT lamps of RGB at a certain interval
(13) What is the difference between an indoor module full-color screen and a patch full-color screen?
a. Light emitting part: The display module of the module full-color screen is generally yellow-green, and the price of the pure green module is more expensive; the patch full-color screen generally uses pure green die
b. Display effect: the pixels of the full-color screen of the module have a thicker visual feeling, lower brightness, and are prone to mosaic phenomenon; the consistency of the patch full-color screen is better, and the brightness is higher
c. Maintenance: the full color of the module is not easy to maintain, and the replacement cost of the entire module is relatively high; the full color of the patch is easy to maintain and can be repaired and replaced by a single lamp
(14) What are real pixels?
Real pixels refer to the 1:1 relationship between the number of physical pixels on the electronic screen and the actual displayed pixels. The actual number of dots on the electronic screen can only display the image information.
(15) What is a virtual pixel?
The virtual pixel refers to the 1:N (N=2, 4) relationship between the physical pixel number of the electronic screen and the actual display pixel number, and the image pixels it can display are 2 or 4 times more than the actual pixels of the electronic screen
(16) What is a perspective? What is perspective? What is the best perspective?
Viewing angle: when the brightness in the viewing direction drops to 1/2 of the normal brightness of the LED electronic screen. The angle between the two observation directions and the normal direction in the same plane. Divided into horizontal and vertical perspective;
Viewing angle: It is the angle formed by the direction of the image content on the electronic screen and the normal of the electronic screen.
The best angle of view: it is just to see the content on the electronic screen, and it is not flat, the angle between the clearest direction of the image content and the normal
(17) What is brightness?
Brightness is the brightness level between the darkest and whitest images that the human eye can distinguish. The more brightness levels the human eye can resolve, the greater the color space of the electronic screen and the greater the potential for displaying rich colors. .
(18) What is resolution?
The number of pixels of the LED electronic screen is called the resolution of the LED electronic screen. Resolution is the total number of pixels of the electronic screen, which determines the information capacity of an electronic screen.
(19) What is gray scale?
Gray scale refers to the degree of light and dark changes of pixels. The gray scale of a basic color generally has 8 levels to 1024 levels. For example, if the gray level of each primary color is 256 levels, for a dual-primary color screen, the display color is 256×256=64K colors, which is also known as a 256-color electronic screen.
(20) What is a dual primary color?
Most color LED electronic screens today are dual-primary color screens, that is, each pixel has two LED dies: one is a red light die, and the other is a green light die. The pixel is red when the red die is on, the pixel is green when the green die is on, and the pixel is yellow when both the red and green dies are on. Among them, red and green are called primary colors.
(21) What is full color?
The red and green primary colors plus the blue primary color, the three primary colors constitute a full color. Since the technology of forming full-color blue tubes and pure green dies is now mature, the market basically uses full-color.
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