Discussion and future of outdoor surface mount LED

With the development of city development and the change of the way of urban life, driven by the rapid development of outdoor LED screen media, it is really effective and close to the consumer terminal, can provide the depth of customer value of outdoor LED display media came into being, that is the outdoor LED display. In order to meet the increasing needs of people's vision, the display effect is more excellent surface mount packaging products began to go outdoors, outdoor table stickers LED display has become popular.

The advantages of outdoor table stickers

A few years ago, almost all of the outdoor LED display with inline Oval Red, green and blue LED devices, and in recent years, the pixel spacing for outdoor full color table 8mm to 16mm with LED display is gradually rising, and widely applied.

Compared with the straight line, the surface mount LED display has more advantages.

First, wide viewing angle. Outdoor SMD full color not only has a wide viewing angle above 110 degrees in the horizontal direction, also has more than 110 degrees wide angle in the vertical direction, which is especially advantageous in some application areas, such as building hanging screen, outdoor LED display in the sky will need a broader perspective to show better advertising effect.

Second, with good light. Red, green and blue oval LED matching at different angles to three brightness is a difficult target, and because the design of full-color SMD structure for the three one, red, green and blue three chips in a bowl bracket, so at different angles of red green and blue three brightness matching is highly consistent, so that the outdoor full color surface mount LED display brightness at any angle consistent good horse, achieve better color fidelity.

Third, good mixing. Because of the design of structure for the three one, three chips are very close in the same bracket light mixing bowl cup, instead of three discrete oval LED, so the red, green and blue light mixing effect is better than the line of elliptic LED screen, especially for close watch.

Fourth, high contrast. Because of the three in one design structure, the color SMD size is small, so the light emitting area is small, the black area is large, and the contrast of the LED display is improved.

Fifth, automated production. LED can be used to fully automatic SMT machine patch, high production efficiency. The design of the circuit board of the outdoor LED display module can realize the combination of the lamp board and the drive board, which reduces the cost, improves the reliability and improves the production efficiency.

In addition, the automatic patch production can also improve the vertical accuracy of the SMD on the circuit board, to overcome the straight elliptical LED vertical accuracy on the circuit board, so as to ensure a better optical effect.

Sixth, light weight box. The structure of the aluminum alloy material box is very light, and the utility model has the advantages of beautiful appearance, easy assembly and easy formation. The utility model is suitable for the leasing company, the vehicle screen and the mobile media, and the installation of the column or the installation of the wall reduces the pressure of the screen body on the steel structure.

Seventh, free glue. The traditional outdoor screen module filling colloid will gradually aging in the sun and rain and ultraviolet irradiation, colloidal properties changed after split off, the circuit board and the LED lost the protective layer, even after a long time of thermal expansion and contraction can not reach the waterproof effect, and will go through the gap into the screen body glue, have a corrosive effect on PCB board, the entire screen effect of life and stability; if one uses three outdoor SMD glue process, because of its light foot too short, glue is too thin, more serious consequences.

In the past, due to the low brightness of the table affixed LED, and waterproof, moisture, UV protection function can not meet the requirements of outdoor harsh environment, so the outdoor full color display is a straight line LED devices in the world. Full color LED display screen can only be used in a large number of indoor. With the development of LED chip technology and LED packaging technology, SMD brightness and protection level has been able to meet the needs of outdoor applications, access to a faster application.

Outdoor table sticking problem

In recent years, LED outdoor table paste 3535/5050 products with its single lamp can not match the three in one color display mode, more and more traditional alternative to a single lamp 346/546 products, become the main choice of outdoor LED display. However, it is not easy to apply the product to the outdoor LED screen, not only need to have a deep understanding of the product, but also need to have an in-depth analysis of outdoor LED display.

First of all, the complexity of the outdoor environment for outdoor table paste products test. The outdoor environment is changing, no one can predict a time, the sun is shining, a time of a dangerous situation, harsh environment, is a severe test of outdoor surface mount LED display, as the general manager of CREE China District, said Dr Liu Er strengthening, harsh chemical environment outdoor environment (such as automobile exhaust test) materials, packaging technology, high difficulty, thermal stress, substrate materials and bonding of the outdoor surface mount products. Recently, the netizen analysis table paste products for outdoor display results from the waterproof structure, stability and other aspects in an industry forum, for this problem, Dr. Liu Erzhuang used a metaphor to explain: a person to shooting with a gun, the bullet misfiring, but we can't all the bullets the conclusion can be used.

Secondly, the high cost of the product can not be affixed to the table for a long time can not be completely replaced by one of the factors.

In the light of its low price to occupy the half of the outdoor display, and transmission