The four elements of LED display
The four elements of LED display
With the development and progress of economic and technological progress, high-rise buildings rise up in the city, and in the high-rise buildings in the wall many are glass curtain wall structure, forming an outdoor advertising media. LED display technology can be used to make the building into a clear display, color realistic outdoor advertising carrier.
Outdoor LED display in the design, have to think about all aspects of the factors: display content, environmental conditions, size, display pixels, etc., and then combined with the cost of the project, the most reasonable design.
Dot Pitch
Spacing refers to the distance between the center of an LED lamp bead and the center of another adjacent lamp bead. As the LED screen enterprises have higher and higher technical requirements, they constantly improve the resolution of the glass curtain wall LED screen, which makes the clarity of the LED screen higher and higher!
1, the point spacing is the key point of the LED curtain wall screen model, but also determines the display effect of the LED screen.
2, point spacing and transmittance is always a difficult choice, the smaller the point spacing, the lower the transmittance. Because the smaller the point pitch, the higher the pixel density, the higher the number of LED light beads per unit area, so it will lose part of the permeability. But! High transmittance happens to be the biggest advantage of the LED transparent screen, and ultra-high transmittance will have to let the LED screen point spacing expansion, at the expense of its picture clarity and display effect.
Packaging technology
An important factor in determining the quality of LED is packaging technology. Choose a good packaging technology can make the whole LED transparent screen color saturation, viewing angle, production costs, stability and other qualitative improvement.
Transparent LED encapsulation technology is mainly surface-mounted SMD mode, which has better heat dissipation, uniform color, and can be maintained in the front, which largely reduces the maintenance cost and maintenance difficulties.
LED control part
LED control part of the LED screen is the final display effect of the “soul”, the control circuit built-in high-performance monolithic micro-controller chip.
1.Driving system
LED driver part of the function is to receive color data and drive the LED transparent screen according to the data expressed in the brightness value display, usually constant current, voltage regulator, constant voltage - constant current three ways.
2. control system
LED display effect is determined by the size of the current and voltage through it, time and other factors, so the control system is mainly to control the power output of the LED. At present, PWM (pulse modulation) control mode design of LED power supply, conversion efficiency of up to 80% ~ 90%, and the output voltage or current is very stable, belongs to the high reliability power supply.
Display requirements
1. Modular unit planning, the whole screen “no splicing”.
2. High consistency and uniformity of the color and brightness of the whole screen, point by point proofreading.
3. Because of the large impact of outdoor light, LED curtain wall screen brightness requirements to achieve more than 4000cd / ㎡.
4. Wide viewing angle, support for horizontal 140 ° / vertical 140 ° large viewing angle display, satisfied with the effect of different viewing angles, covering more audience.
Outdoor LED display in the design, have to think about all aspects of the factors: display content, environmental conditions, size, display pixels, etc., and then combined with the cost of the project, the most reasonable design.
Dot Pitch
Spacing refers to the distance between the center of an LED lamp bead and the center of another adjacent lamp bead. As the LED screen enterprises have higher and higher technical requirements, they constantly improve the resolution of the glass curtain wall LED screen, which makes the clarity of the LED screen higher and higher!
1, the point spacing is the key point of the LED curtain wall screen model, but also determines the display effect of the LED screen.
2, point spacing and transmittance is always a difficult choice, the smaller the point spacing, the lower the transmittance. Because the smaller the point pitch, the higher the pixel density, the higher the number of LED light beads per unit area, so it will lose part of the permeability. But! High transmittance happens to be the biggest advantage of the LED transparent screen, and ultra-high transmittance will have to let the LED screen point spacing expansion, at the expense of its picture clarity and display effect.
Packaging technology
An important factor in determining the quality of LED is packaging technology. Choose a good packaging technology can make the whole LED transparent screen color saturation, viewing angle, production costs, stability and other qualitative improvement.
Transparent LED encapsulation technology is mainly surface-mounted SMD mode, which has better heat dissipation, uniform color, and can be maintained in the front, which largely reduces the maintenance cost and maintenance difficulties.
LED control part
LED control part of the LED screen is the final display effect of the “soul”, the control circuit built-in high-performance monolithic micro-controller chip.
1.Driving system
LED driver part of the function is to receive color data and drive the LED transparent screen according to the data expressed in the brightness value display, usually constant current, voltage regulator, constant voltage - constant current three ways.
2. control system
LED display effect is determined by the size of the current and voltage through it, time and other factors, so the control system is mainly to control the power output of the LED. At present, PWM (pulse modulation) control mode design of LED power supply, conversion efficiency of up to 80% ~ 90%, and the output voltage or current is very stable, belongs to the high reliability power supply.
Display requirements
1. Modular unit planning, the whole screen “no splicing”.
2. High consistency and uniformity of the color and brightness of the whole screen, point by point proofreading.
3. Because of the large impact of outdoor light, LED curtain wall screen brightness requirements to achieve more than 4000cd / ㎡.
4. Wide viewing angle, support for horizontal 140 ° / vertical 140 ° large viewing angle display, satisfied with the effect of different viewing angles, covering more audience.