How to guarantee the operation of outdoor LED display in cold areas
How to guarantee the operation of outdoor LED display in cold areas
With the continuous improvement of the production process, outdoor full-color LED display screen installation and use of the wider and wider range of environments, whether it is the roof of the building, the beach, building facades, deserts and other complex environments can be seen in their figure. Different regions have different performance requirements for the display, for example, in the cold region, there are more stringent technical requirements. So, how should the outdoor LED full-color display in the cold region guarantee its operation? What are the reasons?
1. Cold regions with low temperatures, and large temperature differences, sudden changes in cold and heat shock and temporary low temperature work for outdoor full color LED display devices have more stringent quality requirements.
2. Cold region application of outdoor full color LED display screen must be considered to prevent ice condensation preventive measures.
For reasons of appeal, outdoor full color LED display in the use of cold areas, must be in the key technical problems to be solved. Mainly from three aspects;.
First, the temperature change of cold and heat shock may cause led device failure.
Second, led driver low temperature operation reliability assurance.
Third, outdoor LED full color display screen ice condensation hazards of protective measures.
These three aspects, specifically the reliability assurance of low temperature operation of led driver. Outdoor full color LED display can be from low temperature operation environment with reliability assurance. At present most of the outdoor full-color LED display in the cold region under the low temperature environment expressed different types of soil and water phenomenon, or display effect on the problem. The more prominent phenomenon is low temperature can't start normally and temporary low temperature operation environment of the failure rate is higher phenomenon, and the reason for this is that the drive power supply in the design stage of the device selection did not consider the reliability of the low temperature working condition, the local key components of the characteristics of the low-temperature environment changes, resulting in the driver can't low-temperature startup or normal operation, triggered by the failure of the specific reasons are mainly the following aspects:
1. The density and activity of the carriers of the switching tube in low temperature conditions will be reduced, and the starting point of overload protection will be reduced as a result.
2. Localized types of optical coupling devices do not work properly at low temperatures.
3. Electrolytic capacitor electrolyte freezes at low temperatures and loses its capacitive effect (ions in solution are only ionically polarized at this point) without the ability to carry load.
4. Input to prevent inrush current thermistor, low-temperature resistance becomes large (3 to 5 times the normal temperature) will also cause low-temperature can not start normally.
As well as the problems that arise in operation, and choose a better temperature characteristics of the outdoor full color LED display device to start is the key to solving the problem. Especially outdoor full-color LED display to take into account the factors of improving reliability and reducing maintenance costs, this design adjustment is very necessary and cost-effective so in this problem need to be more research and analysis, so as to take corresponding measures!
1. Cold regions with low temperatures, and large temperature differences, sudden changes in cold and heat shock and temporary low temperature work for outdoor full color LED display devices have more stringent quality requirements.
2. Cold region application of outdoor full color LED display screen must be considered to prevent ice condensation preventive measures.
For reasons of appeal, outdoor full color LED display in the use of cold areas, must be in the key technical problems to be solved. Mainly from three aspects;.
First, the temperature change of cold and heat shock may cause led device failure.
Second, led driver low temperature operation reliability assurance.
Third, outdoor LED full color display screen ice condensation hazards of protective measures.
These three aspects, specifically the reliability assurance of low temperature operation of led driver. Outdoor full color LED display can be from low temperature operation environment with reliability assurance. At present most of the outdoor full-color LED display in the cold region under the low temperature environment expressed different types of soil and water phenomenon, or display effect on the problem. The more prominent phenomenon is low temperature can't start normally and temporary low temperature operation environment of the failure rate is higher phenomenon, and the reason for this is that the drive power supply in the design stage of the device selection did not consider the reliability of the low temperature working condition, the local key components of the characteristics of the low-temperature environment changes, resulting in the driver can't low-temperature startup or normal operation, triggered by the failure of the specific reasons are mainly the following aspects:
1. The density and activity of the carriers of the switching tube in low temperature conditions will be reduced, and the starting point of overload protection will be reduced as a result.
2. Localized types of optical coupling devices do not work properly at low temperatures.
3. Electrolytic capacitor electrolyte freezes at low temperatures and loses its capacitive effect (ions in solution are only ionically polarized at this point) without the ability to carry load.
4. Input to prevent inrush current thermistor, low-temperature resistance becomes large (3 to 5 times the normal temperature) will also cause low-temperature can not start normally.
As well as the problems that arise in operation, and choose a better temperature characteristics of the outdoor full color LED display device to start is the key to solving the problem. Especially outdoor full-color LED display to take into account the factors of improving reliability and reducing maintenance costs, this design adjustment is very necessary and cost-effective so in this problem need to be more research and analysis, so as to take corresponding measures!