The main characteristics of a, full-color LED display screen
Full color LED display is a kind of LED display, it has the characteristics of the mainly include:
(1) the color is rich, by the three primary colors (red, green, blue) display units of red, green, blue each gray level 256 16777216 colors, make electronic screen shows rich colors, high saturation, high resolution, high frequency of dynamic images displayed;
(2) the effect is good, a nonlinear correction technology, image more clear, administrative levels feeling stronger;
(3) reliability: the distributed scan technology and modular design technology, higher reliability, stability;
(4) super detection functions: real-time detection screen pixels in failure, whether the working state of the remote transmission pixels;
(5) a new mask design, make the LED light almost zero reflection, to ensure that the screen display effect;
(6) high flatness: housing roughness coefficient of < 0.5 mm, the power factor can reach above 88%;
(7) input signal diversity: support for the RF, S - VIDIEO, RGBTV, YUT, YC, COMPOSITION and so on stage signal;
(8) high waterproof performance: the module back use waterproof aprons, positive with high quality imported rubber glue;
(9) durability: USES the hot spraying technology, greatly improve the antirust function; Luminous module warranty decade, mask not reflective, uv resistant, five years do not fade.
Second, full-color LED display products material selection
1. LED lights and chip.
LED lights, LED tube, it is the key to the LED electronic display device, so should use quality is reliable, mature encapsulation of LED products. Choice of LED products must have good stability, small discreteness, HBM is greater than 4000 v, attenuation amplitude small compression capability is strong, brightness, wavelength and Angle consistency, good light distribution effect, and can resist high temperature, moisture and ultraviolet (uv) requirements.
2. The box body.
The overall adopts steel or aluminum, use open structure. System.after the use at the bottom of the pin and the guide sleeve, the precise positioning between guarantee body. Housing overall protection IP65 standard, additional structure should give full consideration to the cooling problem, etc.
3. The switch power supply.
Display the famous brand of the power supply using certified switch regulated power supply module, all of the switch power supply through rigorous testing, screening, aging. Ensure full compliance with international safety and quality certification requirements, to adapt the demand of display long-term stable and reliable work. Under the rated working conditions. Ensure that the service life of more than 10 years.
4. Plug and socket.
Connector is an important connecting device in system. Connectors should be made of high quality products and to ensure the thickness of gold plating of connectors, the electrical connection in the best performance. Guarantee system in high temperature and high humidity environment performance of electrical connection, you can make the system run stably and reliably for a long time.
5. Circuit board.
Circuit board using flame retardant epoxy plate, design rational layout, line specifications, meet the requirements of electromagnetic compatibility and stability of the circuit. Processing factory should choose well-known manufacturers of products.
6. Driver chip IC device.
Drive circuit adopt international famous brand of the constant current driver chip. In a large temperature range, high precision of constant current output and high reliability, can improve the uniformity and reliability of the display screen. Display system main material should be passed CE, FCC, UL, CCC, ISO9000 certification, etc.

Believe that if the above said, insist on reliable material of supporting facilities and professional research and development design technology, will be able to reduce the failure rate of the display, and will greatly improve the reliability and stability of LED display.

Third, full-color LED display of identification
The stand or fall of full-color LED display mainly from the following several aspects to sign:
1. The flatness.
LED display surface roughness to within + / - 1 mm, to ensure that the display image is not distorted, local convex or concave leads to display the visual Angle of corner. The stand or fall of flatness is mainly decided by the production process.
2. The brightness and the viewing Angle.
Indoor full color brightness to above 800 CD / ㎡, outdoor full color brightness to above 1500 CD / ㎡, in order to guarantee the normal work of the screen, otherwise it will because the brightness is too low and can't see shown in the image. The size of the brightness mainly decided by the stand or fall of LED lamp bead.
Viewing angles directly depends on the size of the LED display how many of the audience, and the bigger the better. The size of the viewing Angle is mainly composed of tube core encapsulated way to decide.
3. The white balance effect.
The white balance effect is one of the most important indicator LED display. Chromatology on red, green and blue color for the proportion of 1:4. Lost. 16 will only show the pure white, if the actual rate is a little deviation will appear white balance deviation, generally pay attention to whether there is a slant blue, white slant yellow phenomenon. The stand or fall of the white balance is mainly composed of LED display control system to determine, lamp bead of color reducibility may also be affected.
4. Color reducibility.
Color reducibility refers to the reducing of color LED display, LED display shows both the colors to maintain highly consistent with the colour of the source, so as to ensure the image sense of reality.
5. Product design.
Full color LED display, indoor, outdoor, high energy saving, highlighting, refresh, portable products, from all walks of life have different requirements for LED display, so buyers in distinguish abundance when choosing LED display and LED display, to gather their demand to the maximum extent LED display products are conform to their own needs.
6. Material control.
The selection of materials, is crucial to the stand or fall of display, choose high quality raw materials to keep control of LED display quality at source. So for the buyers at the point.
1) LED lights. High-grade representative: day, sharp (chip packaging); Intermediate: wafer, optical lei, silan (chip), LED lights LED high industrial chain involved, especially involving more domestic packaging industry, the same wafer, silan chip due to the different of the packaging, LED variable quality, the high product of LED lamp encapsulation tube representative for light (Taiwan) star, lehman.
2) the LED driver IC: accumulate sun and moon.
3) power supply (reinforced) : the power supply is to undertake the main components of the power cord connected to the PCB, although not decided to LED display the main aspects of quality, but its strong durability, conductive performance and so on also affects the life of the display screen and protection grade.
(4) row needle with simple horn) : row needles through the wiring connection control system and the main components of control circuit of PCB, preferred with horns row needle, not only make the loading screen when prevent wiring plug caused rework, can effectively prevent row needles exposed more loading screen and maintenance personnel.
5) resistor, capacitor and other components: as the saying goes, every detail, because the LED display often switch machine, the stand or fall of capacitance also affects the switch machine time to protect the display screen, resistance is to control the display current main components, optimizing big brand products.
6) the LED module masks and pan: main material for plastics. Imported high quality materials, deformation, strong resistance to environment.

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