What is a LED?
LED is short for light-emiting diode. LED screens are made from many smaller light emitting diodes placed close together.
Each LED emits three colors – Red, Green and Blue – which together light up as needed to create a range of colors. The colors combine to create an image.
What is a Pixel?
Pixel is the diminutive for picture element. Pixels are points of light that illuminate at the same time to form letters, words, animations and videos. A pixel can be formed of one or more LEDs of the same color or of several colors. A pixel is the smallest element of a LED screen (or LED wall) that can be individually monitored. It can be switched off or switched on at different intensity levels.
What is pixel pitch?
Pixel pitch is the distance between the center of an LED and the LED next to it. The smaller the pixel pitch, the better the resolution and picture quality of the LED.
How are LEDs different from traditional screens?
While traditional LCD screens are typically used inside, LEDs are effective in practically any environment. They are designed to remain bright and visible even under direct sunlight and withstand most weather conditions. Unlike LCD screens, they are extremely durable and can be used for projects on a much larger scale.
What can LEDs be used for?
LED screens can be used for practically anything. Any image or video can be shown on them. Our engineers here at Street Communication can manipulate LED screens into a wide range of shapes and sizes, creating endless possibilities. Furthermore, LEDs work well both indoors and outdoors as they are exceptionally durable.
Which screen is best for me?
Choosing a screen is difficult because many factors need to be taken into account. Typically screens with smaller pixel pitches are superior indoors, while those with larger are better outside. We offer consultancy to help you reach a decision, so please reach out to us.
How does the viewing angle affects the image quality?
Making the smartest choice for your LED display can be difficult depending on the context of your project. The viewing angle depends on the brightness of the screen. Depending on the angle the viewer is watching the screen, colors and saturation can vary and give the image a blur effect. To chose your display wisely, read more on viewing angles.
How does the pixel pitch affect the screen resolution?
Before choosing your display your should know a few tricks that will help you take the right direction. Depending on the viewing distance needed for the project, the pixel pitch of the LED display is the first information you want to look for, read more on pixel pitch, resolution and ideal viewing distance here.
How to help the user to select the appropriate display?
(1) to display content
(2) visual distance, the perspective of the confirmation
(3) Screen resolution requirements
(4) installation of environmental requirements
(5) cost control
How are LED displays better than Video Projectors?
Video projectors often seem like an easier and cheaper solution, but they dont display the same quality image, the same brightness and can’t adapt to any context like innovative LED displays do.
Paste the LED outdoor screen can use the table, why?
Not. Demanding outdoor screen installation structure, SMD LED unable to adapt to the harsh outdoor environment.The outdoor screen brightness higher, SMD LED unable to meet the outdoor screen brightness.
Display’s aspect ratio in general?
Graphic screen: to determine the content displayed; Video Screen: general close to 4:3 or 4:3; the ideal ratio is 16:9.
Why outdoor screen production cycle is long?
(1) procurement of raw materials: the LED lamp procurement cycle is longer, especially imported die, order cycle takes 4-6 weeks;
(2) The production process is complex: subject to the PCB design, production casing, plastic irrigation, adjusting white balance;
(3) strict structural requirements: the general cabinet design, the need to consider the wind, rain, lightning.
What is the difference between the indoor module full color and full color of the patch?
(1) light-emitting part: module full color display module is generally green and yellow, pure green module expensive; SMD full color generally use pure green core.
(2) display: Module full color pixel visual feeling of thick, low brightness, easy mosaic phenomenon; SMD full color consistency is better, higher brightness.
(3) Maintenance: module difficult to maintain full-color, high replacement costs of the entire module; SMD full color and easy to maintain, repair and replacement of a single lamp.
The display screen does not work and the green light of the sending? card flashes (made into retractable type)?
Cause of failure:
1.There is no power supply for the screen;
2.The network cable is not connected properly;
3. The receiving card has no power supply or the power supply voltage is too low;
4.The sending card is broken;
5.Connection or failure of signal transmission intermediate equipment (such as function card and optical fiber transceiver box);
Troubleshooting methods：
1.Check and confirm that the power supply of the screen is normal;
2.Check and reconnect the network cable;
3.Ensure that the DC output power supply of the power supply is 5-5.2v;
4.Replace the sending card;
5.Check the connection or replace the function card (optical fiber transceiver)
The display screen does not work and the green light of the sending? card does not flash?
Cause of failure:
1. DVI or HDMI cable is not connected properly;
2.The copy or expansion mode in the graphics card control panel is not set;
3.The software chooses to turn off the power supply of the large screen;
4.The sending card is not inserted in place or there is a problem with the sending card;
Troubleshooting methods:
1.Check DVI cable connector;
2.Reset the copy mode;
3.The software selects to turn on the large screen power supply;
4.Reinsert the sending card or replace the sending card
Prompt "large screen system not found" at startup?
Cause of failure:
1.The serial port cable or USB cable is not connected with the sending card;
2.Computer com or USB port is broken;
3.The serial port cable or USB cable is broken;
4.The sending card is broken;
5.USB driver is not installed
Troubleshooting methods:
1.Confirm and connect the serial port cable;
2.Replace the computer;
3.Replace the serial port cable;
4.Replace the sending card;
5.Install new software or separate USB driver
The long bar with the same height as module W is not displayed, or part of it is not displayed, and the color is missing?
Cause of failure:
1.Poor contact or disconnection of flat cable or DVI cable (applicable to submarine Series);
2.There is a problem with the former output or the latter input of the display light panel at the junction
Troubleshooting methods:
1.Reinsert or replace the cable;
2.First determine which display module is faulty, and then replace it for maintenance
Some modules (3-6) are not displayed?
Cause of failure:
1.Power protection or damage;
2.Poor contact of AC power line
Troubleshooting methods:
1.Check and confirm that the power supply is normal;
2.Reconnect the power cord
The whole box is not displayed？
Cause of failure:
1.220V power supply line is not connected properly;
2.There is a problem with network cable transmission;
3. The receiving card is damaged;
4.Dislocation of hub board
Troubleshooting methods:
1.Check the power supply line;
2.Confirm to replace the network cable;
3.Replace the receiving card;
4.Reinsert hub
Full screen flower point, picture shadow button movement?
Cause of failure:
1.The driver loader is incorrect;
2.The network cable of computer and screen is too long or of poor quality;
3.Sending card is broken
Troubleshooting methods:
1.Reload the receiving card file;
2.Reduce the length of network cable or replace it;
3.Replace the sending card
Shaking or ghosting of the whole screen?
Cause of failure:
1.Check the communication line between the computer and the large screen;
2.Check the DVI cable between the multimedia card and the sending card;
3.The sending card is broken.
Troubleshooting methods:
1.Reinsert or replace the communication line;
2.Punching and reinforcing DVI # line;
3. Replace the sending card.
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