LED basic knowledge quiz
1,what is LED?
LED is light emitting diode , display industry call”LED” especially point to can emit light LED.
2, what is pixel?
It is minimum light luminous on led display. , meanings is same with the ordinary computer display.
3, what is pixel spacing”?
distance between one center of pixel to center of pixel
4, what is LED display module ?
Multi-pixel and special circuit to compose a minimum LED display, meanwhile the structure is independent, typical module has “8 x 8″, “5 x 7″, “5 x 8″ etc.,
5, what is DIP?
DIP is Double-in-line Package acronym, dual in-line assembly;
6, What is SMT? What is the SMD?
SMT is Surface Mounted Technology acronym, it’s a kind of technology and technique most popular on the electronic assembly industry’s. SMD is Surface mounted device acronym
7, what is LED display module?
To determined by circuit and installation of the basic unit, with display function. Through simply install to achieve the base unit function.
8, what is LED display screen ?
Through certain control method, the display screen is composed of LED array.
9, what is the inserted lamp module? What are the advantages and disadvantages?
Refers to the DIP package light the lamp foot through the PCB board, the tin filled in the lamp holes with welding, this technology module is call “inserted lamp module”; the advantages is: large visual angle, high brightness, good heat dissipation; disadvantage is the pixel density;
10, what is the Surface mount? What are the advantages and disadvantages?
Surface mount is also called the SMT, SMT package light through the welding process of welding on the surface of the PCB, the foot of lamp not through the PCB board, made by this process is called surface-mount module; advantages are: the perspective of large, display image soft, large pixel density, suitable for indoor viewing; drawback is that the brightness is not enough, the heat dissipation is not good enough;
11, what is the sub surface mount module? What are the advantages and disadvantages?
Sub surface mount is a product between DIP and SMT, the LED lamp package surface like SMT, but its positive and negative pin and DIP, production is through the PCB board to welding, the advantages are: high brightness, good display effect, the shortcoming is: complex process, difficult to repair;
12, What is the 3-in-1? What are the advantages and disadvantages?
Refers to the R, G, B three different colors of LED chip package in the same gel; advantages are: the production of simple, good display effect, the disadvantage is: spectrophotometric color difficult, high cost;
13, What is three and one? What are the advantages and disadvantages?
refers to the R, G, B three independent SMT package tied together in a certain light vertical spacing, so that not only has the 3-in-1 All individual advantages, but also to solve the shortcomings of 3-in-1;