LED display industry people gather together, it is easy to talk about LED display products: how much dot spacing, how to refresh, how to use constant current drive... If you don't understand, such chat, do you feel good pressure? Big?
How to do it? They all say the terminology, and many people regard it as a prerequisite for pretending that they understand LED displays. Today, Xiaobian will share with you the most complete explanation of the LED display in history, so that you can change from the LED display white to the screen emperor in 2017!
(Warm reminder, nowadays English abbreviation is more and more applied, and there are more and more ambiguities, so be sure to remember, don't make jokes.)
1. What is LED?
LED is the abbreviation of LIGHT EMITTING DIODE. LEDs in the display industry refer to LEDs that emit visible bands.
2. What is a pixel?
The minimum illumination unit of the LED display has the same meaning as the pixel described in the ordinary computer display.
3. What is the pixel distance (point spacing)?
The center distance between two adjacent pixels, the smaller the spacing, the shorter the visible distance. The industry is often referred to as P to indicate the point spacing.
4. What is the pixel density?
Also known as dot matrix density, it usually refers to the number of pixels per square meter of display.
5. What is the LED display module?
A small unit consisting of several display pixels that are structurally independent and can form an LED display. Typical are 8*8, 8*7, etc.
6. What is DIP?
DIP is an abbreviation for DOUBLE IN-LINE PACKAGE, which is a dual in-line assembly.
7. What is SMT? What is SMD?
SMT is the surface assembly technology (short for SURFACE MOUNTED technology), which is currently the most popular technology and process in the electronics assembly industry; SMD is the surface mount device (short for surface mounted device).
8. What is the LED display module?
It has a basic unit with circuit and installation structure, display function, and display function by simple assembly.
9. What is an LED display?
A display screen composed of an array of LED devices by a certain control method.
10. What is the plug-in module, what are the advantages and disadvantages?
It means that the lamp of DIP package passes the lamp foot through the PCB board, and the tin is filled in the lamp hole by soldering. The module made by this process is the plug-in lamp group. The advantages are: high brightness, good heat dissipation, and the disadvantage is The pixel density is small.
11: What is a surface mount module? What are the advantages and disadvantages?
The surface mount is also called SMT. The SMT packaged lamp is soldered to the surface of the PCB board through the soldering process. The lamp pins do not need to pass through the PCB board. The module made by this process is called the surface mount module. The advantage is that the display effect is good. 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.
12. What is the sub-surface module? What are the advantages and disadvantages?
Sub-surface label is a product between DIP and SMT. Its LED lamp has the same package surface as SMT, but its positive and negative pins are the same as DIP, and it is also soldered through PCB. The advantages are: high brightness, good display effect, disadvantages: complicated process and difficult maintenance;
13. What is 3-in-1? What are its advantages and disadvantages?
It means that the SMT lamps of RGB three different color LED chip packages are vertically juxtaposed at a certain interval, which not only has all the advantages of 3-in-1, but also solves various shortcomings of three-in-one: complicated process and difficult maintenance .
14. What is three-in-one?
The three independent SMT lamps of RGB are vertically juxtaposed at a certain interval, which not only has the advantages of 3-in-1, but also solves various shortcomings of the three-in-one.
15. What is a double primary color, pseudo color, full color display?
Different color LEDs can be used to form different display screens. The two primary colors are composed of red, green or yellow and green. The pseudo color is composed of three different colors: red, yellow green and blue. The full color is red. , pure green, pure blue three different colors.
16: What is the brightness of the light?
The intensity of light emitted by the unit area of ​​the LED display, in units of CD/square meter, is simply the intensity of light emitted by a square meter display;
17: What is the brightness level?
The number of levels of manual or auto-adjustment of the brightness of the entire screen between the lowest and highest brightness.
18. What is grayscale?
Technical processing levels between the darkest and the brightest at the same brightness level
19. What is the maximum brightness?
Under certain ambient illumination, each primary color of the LED display is at the maximum brightness and maximum gray level;
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