This article introduces the advantages of the outdoor full-color SMD SMD display and the performance parameters of the dedicated outdoor full-color SMD used, which will help people understand and promote the outdoor SMD display.
I. Overview
LED displays occupy the mainstream market of large-size indoor and outdoor displays due to their high brightness, weather resistance, and large size, while picture tube displays (CRT), liquid crystal displays (LCD) and plasma displays (PDP) are used in small and medium-sized, indoor and near Displays viewed from a distance occupy the mainstream in the market.
LED displays have been widely used in advertising, stage, public information display, sports transportation facilities and other fields. LED displays are divided into indoor, outdoor and semi-outdoor LED displays according to the use environment; according to the display color, they are divided into single-color screen, double-color screen and full-color screen; SMD SMD screen.
What this article is going to describe is the emerging outdoor full-color SMD SMD display and its special SMD device performance.
2. The main advantages of outdoor full-color SMD SMD display
As we all know, outdoor LED displays all used in-line oval red, green and blue LED devices one or two years ago, and in the past two years, outdoor full-color SMD SMD displays with a pixel pitch of 8mm to 16mm are becoming more and more popular. Gradually rise and gain wide application.
In the past, due to the low brightness of the patch SMD, and the waterproof, waterproof
The moisture and UV protection functions cannot meet the requirements of outdoor harsh environments, so outdoor full-color display screens are dominated by in-line LED devices. Full-color SMD SMD display can only be widely used indoors. With the advancement of LED chip technology and LED packaging technology, the brightness and protection level of SMD have been able to meet the needs of outdoor applications, and the full-color SMD SMD display has more features that are difficult to achieve for full-color in-line LED displays. Advantages, so a faster application is obtained.
The advantages of the outdoor full-color SMD SMD display compared to the outdoor in-line oval LED display indoor are as follows:
(1) Wide viewing angle
The outdoor full-color SMD SMD display not only has a wide viewing angle of 110 degrees in the horizontal direction, but also has a wide viewing angle of 110 degrees in the vertical direction, which is particularly advantageous in some applications.
(2) Good light distribution
The matching consistency of the red, green and blue oval LEDs at different angles is a very difficult indicator, and the full-color SMD is designed with a three-in-one structure, and the three chips of red, green and blue are all in one. In a bracket bowl, the matching consistency of red, green and blue brightness at different angles is highly consistent, so that the outdoor full-color SMD SMD display has a good brightness matching consistency at any angle, reaching Better color fidelity.
Figure 1 and Figure 2 below are the outdoor full-color patch SMD light distribution curve and the outdoor full-color oval LED light distribution curve respectively. It can be seen from the comparison that the light distribution consistency of SMD has obvious advantages over elliptical LED.
Performance advantages of full-color SMD SMD display
Figure 1 Outdoor full-color SMD horizontal light distribution curve Figure 2 Outdoor elliptical LED horizontal light distribution curve
(3) good light mixing
Because the design structure is three-in-one, the distance between the three chips is very close, and the light is mixed in the same bracket bowl instead of three discrete oval LEDs, so the red, green, and blue light mixing effect is better than that of the in-line oval LED screen, especially for close viewing.
(4) High contrast
Due to the three-in-one design structure, the full-color SMD is small in size, so the light-emitting area is small, and the black area is large, which improves the contrast of the LED display.
(5) Automatic production
SMD SMD can use automatic placement machine for automatic placement, high production efficiency. The circuit design of the full-color SMD SMD display module can realize the combination of the light board and the driver board, which reduces the cost, improves the reliability and improves the production efficiency.
Automated patch production can also improve the vertical accuracy of SMD on the circuit board, and overcome the problem of the vertical accuracy of the in-line elliptical LED on the circuit board, thereby ensuring better optical effects.
3. Main parameters of outdoor full-color SMD SMD
(1) Brightness
At present, the brightness of the outdoor full-color SMD SMD can meet the brightness requirements of the outdoor full-color SMD SMD display with a dot pitch of 8mm to 16mm. Among them, the brightness of green can reach 1200mcd to 1600mcd, and the brightness of the whole screen can be higher than 5000nits.
In order to ensure the consistency of the brightness of the entire screen, the brightness range of each color should be below 1:1.3, and the average brightness ratio of the three colors of red, green, and blue is about 3:6:1.
(2) Wavelength
The wavelength ranges of the three colors of red, green and blue should not be wider than 5nm, and the wavelength distribution of each color should be normally distributed.
(3) Attenuation
Outdoor full-color SMD SMD uses a relatively high current due to brightness. Due to its outdoor use, in order to achieve the minimum attenuation, it has higher requirements on chip size, heat dissipation design, waterproof, and UV resistance. At the same time, the brightness attenuation of the three colors of red, green and blue must be consistent, so as to ensure that the SMD display not only has a small decrease in brightness after working for a long time, but also maintains good brightness and color consistency. High-quality outdoor full-color SMD SMDs can generally guarantee that the average red, green, and blue attenuation is less than 5% after 3000 hours of work, and the dispersion of red, green, and blue attenuation is less than +10%.
(4) angle
The angle of outdoor full-color SMD SMD generally requires that both the horizontal direction and the vertical direction are greater than 110 degrees.
(5) Waterproof and moisture-proof
The waterproof and moisture-proof performance of outdoor full-color SMD SMD is a very important key parameter. The selection of SMD bracket material and structural design determine the waterproof and moisture-proof performance. Only the adoption of new PPA materials, silicone materials and the design of new structures can solve the waterproof and moisture-proof problems. If the waterproof and moisture-proof problems are not well resolved, there will be problems such as failure, dark light, and rapid attenuation. The waterproof and dustproof grade of the high-quality outdoor full-color SMD SMD can reach IP67, and the moistureproof grade is Lever3.
(6) UV protection
Due to outdoor use, the support material and potting material of the full-color SMD SMD are required to have the ability to resist ultraviolet rays. SMDs that are not UV-resistant will have yellowing of PPA and turbidity of potting materials, resulting in brightness attenuation and failure. The yellowing ratio of the high-quality outdoor full-color patch SMD after 10,000 hours of outdoor work should not exceed 5%.
(7) Failure rate
It is prone to failure under the action of many factors. The failure rate of high-quality outdoor full-color SMD SMDs should be less than five parts per hundred thousand (50ppm) within 3000 hours.
(8) Thickness
Outdoor full-color patch SMD display takes into account the waterproof factor of the circuit board, and it needs to be potted with waterproof glue below the thickness of the SMD. Therefore, the full-color patch SMD needs a certain height. Currently, the thickness of the mainstream on the market is 2.5mm.
4. The development trend of outdoor full-color SMD SMD display
In terms of brightness and cost, the traditional outdoor full-color in-line oval LED display has an irreplaceable advantage in the pixel pitch of 20mm and above. With the improvement of LED chip brightness and LED packaging technology, the price gap between outdoor full-color patch SMD and oval LED has narrowed to 10% to 20%. Outdoor full-color SMD SMD display has the advantages of wide viewing angle, good light distribution, good light mixing, high contrast and easy automatic production. The in-line elliptical LED display screen divides the world equally.
I. Overview
LED displays occupy the mainstream market of large-size indoor and outdoor displays due to their high brightness, weather resistance, and large size, while picture tube displays (CRT), liquid crystal displays (LCD) and plasma displays (PDP) are used in small and medium-sized, indoor and near Displays viewed from a distance occupy the mainstream in the market.
LED displays have been widely used in advertising, stage, public information display, sports transportation facilities and other fields. LED displays are divided into indoor, outdoor and semi-outdoor LED displays according to the use environment; according to the display color, they are divided into single-color screen, double-color screen and full-color screen; SMD SMD screen.
What this article is going to describe is the emerging outdoor full-color SMD SMD display and its special SMD device performance.
2. The main advantages of outdoor full-color SMD SMD display
As we all know, outdoor LED displays all used in-line oval red, green and blue LED devices one or two years ago, and in the past two years, outdoor full-color SMD SMD displays with a pixel pitch of 8mm to 16mm are becoming more and more popular. Gradually rise and gain wide application.
In the past, due to the low brightness of the patch SMD, and the waterproof, waterproof
The moisture and UV protection functions cannot meet the requirements of outdoor harsh environments, so outdoor full-color display screens are dominated by in-line LED devices. Full-color SMD SMD display can only be widely used indoors. With the advancement of LED chip technology and LED packaging technology, the brightness and protection level of SMD have been able to meet the needs of outdoor applications, and the full-color SMD SMD display has more features that are difficult to achieve for full-color in-line LED displays. Advantages, so a faster application is obtained.
The advantages of the outdoor full-color SMD SMD display compared to the outdoor in-line oval LED display indoor are as follows:
(1) Wide viewing angle
The outdoor full-color SMD SMD display not only has a wide viewing angle of 110 degrees in the horizontal direction, but also has a wide viewing angle of 110 degrees in the vertical direction, which is particularly advantageous in some applications.
(2) Good light distribution
The matching consistency of the red, green and blue oval LEDs at different angles is a very difficult indicator, and the full-color SMD is designed with a three-in-one structure, and the three chips of red, green and blue are all in one. In a bracket bowl, the matching consistency of red, green and blue brightness at different angles is highly consistent, so that the outdoor full-color SMD SMD display has a good brightness matching consistency at any angle, reaching Better color fidelity.
Figure 1 and Figure 2 below are the outdoor full-color patch SMD light distribution curve and the outdoor full-color oval LED light distribution curve respectively. It can be seen from the comparison that the light distribution consistency of SMD has obvious advantages over elliptical LED.
Performance advantages of full-color SMD SMD display
Figure 1 Outdoor full-color SMD horizontal light distribution curve Figure 2 Outdoor elliptical LED horizontal light distribution curve
(3) good light mixing
Because the design structure is three-in-one, the distance between the three chips is very close, and the light is mixed in the same bracket bowl instead of three discrete oval LEDs, so the red, green, and blue light mixing effect is better than that of the in-line oval LED screen, especially for close viewing.
(4) High contrast
Due to the three-in-one design structure, the full-color SMD is small in size, so the light-emitting area is small, and the black area is large, which improves the contrast of the LED display.
(5) Automatic production
SMD SMD can use automatic placement machine for automatic placement, high production efficiency. The circuit design of the full-color SMD SMD display module can realize the combination of the light board and the driver board, which reduces the cost, improves the reliability and improves the production efficiency.
Automated patch production can also improve the vertical accuracy of SMD on the circuit board, and overcome the problem of the vertical accuracy of the in-line elliptical LED on the circuit board, thereby ensuring better optical effects.
3. Main parameters of outdoor full-color SMD SMD
(1) Brightness
At present, the brightness of the outdoor full-color SMD SMD can meet the brightness requirements of the outdoor full-color SMD SMD display with a dot pitch of 8mm to 16mm. Among them, the brightness of green can reach 1200mcd to 1600mcd, and the brightness of the whole screen can be higher than 5000nits.
In order to ensure the consistency of the brightness of the entire screen, the brightness range of each color should be below 1:1.3, and the average brightness ratio of the three colors of red, green, and blue is about 3:6:1.
(2) Wavelength
The wavelength ranges of the three colors of red, green and blue should not be wider than 5nm, and the wavelength distribution of each color should be normally distributed.
(3) Attenuation
Outdoor full-color SMD SMD uses a relatively high current due to brightness. Due to its outdoor use, in order to achieve the minimum attenuation, it has higher requirements on chip size, heat dissipation design, waterproof, and UV resistance. At the same time, the brightness attenuation of the three colors of red, green and blue must be consistent, so as to ensure that the SMD display not only has a small decrease in brightness after working for a long time, but also maintains good brightness and color consistency. High-quality outdoor full-color SMD SMDs can generally guarantee that the average red, green, and blue attenuation is less than 5% after 3000 hours of work, and the dispersion of red, green, and blue attenuation is less than +10%.
(4) angle
The angle of outdoor full-color SMD SMD generally requires that both the horizontal direction and the vertical direction are greater than 110 degrees.
(5) Waterproof and moisture-proof
The waterproof and moisture-proof performance of outdoor full-color SMD SMD is a very important key parameter. The selection of SMD bracket material and structural design determine the waterproof and moisture-proof performance. Only the adoption of new PPA materials, silicone materials and the design of new structures can solve the waterproof and moisture-proof problems. If the waterproof and moisture-proof problems are not well resolved, there will be problems such as failure, dark light, and rapid attenuation. The waterproof and dustproof grade of the high-quality outdoor full-color SMD SMD can reach IP67, and the moistureproof grade is Lever3.
(6) UV protection
Due to outdoor use, the support material and potting material of the full-color SMD SMD are required to have the ability to resist ultraviolet rays. SMDs that are not UV-resistant will have yellowing of PPA and turbidity of potting materials, resulting in brightness attenuation and failure. The yellowing ratio of the high-quality outdoor full-color patch SMD after 10,000 hours of outdoor work should not exceed 5%.
(7) Failure rate
It is prone to failure under the action of many factors. The failure rate of high-quality outdoor full-color SMD SMDs should be less than five parts per hundred thousand (50ppm) within 3000 hours.
(8) Thickness
Outdoor full-color patch SMD display takes into account the waterproof factor of the circuit board, and it needs to be potted with waterproof glue below the thickness of the SMD. Therefore, the full-color patch SMD needs a certain height. Currently, the thickness of the mainstream on the market is 2.5mm.
4. The development trend of outdoor full-color SMD SMD display
In terms of brightness and cost, the traditional outdoor full-color in-line oval LED display has an irreplaceable advantage in the pixel pitch of 20mm and above. With the improvement of LED chip brightness and LED packaging technology, the price gap between outdoor full-color patch SMD and oval LED has narrowed to 10% to 20%. Outdoor full-color SMD SMD display has the advantages of wide viewing angle, good light distribution, good light mixing, high contrast and easy automatic production. The in-line elliptical LED display screen divides the world equally.
Odhalení Pokladu V Kasinu Mostbet: Ultimátní Herní Ráj
