Led display system products have been anti-acid rain, anti-salt spray, waterproof, moisture, dust, anti-burning, anti-corrosion treatment, through salt spray test, the test results show that: products meet the national industrial standards, Test requirements, even in the maritime climate conditions, the screen can also be long-term normal use.
Three anti-measures: all the circuit board in the production of testing after the use of special electronic three anti-paint treatment, and smear flame retardant materials, so that it has a dust, moisture, corrosion, flame retardant properties.
Pixels and modules are sealed with insulating rubber rings to prevent moisture penetration.
Screen outside the decoration by the corrosion resistance of the flame retardant material is very good quality aluminum-plastic plate production, plate between the patchwork tightly filled with high quality weathering glue.
The joints between the decoration and the module are filled with foam bars and filled with high quality weathering glue to prevent water vapor from penetrating.
All product shell protection level to reach the pre-discharge IP65 above.
1 temperature control and dehumidification
Screen body inside the installation of smoke, temperature detectors, connected to the PLC control system monitoring screen status. When the internal temperature of the screen due to long-term operation of the larger temperature or humidity due to climate reasons, the system can open the fan and air conditioning. In case of special circumstances PLC system can automatically cut off the screen power and send an alarm signal
2 electrical safety
Electrical safety performance assurance measures taken is to configure the PLC controller. Controlled by a PLC power distribution cabinet, boot a few steps will display the screen open to suppress the switching power supply when the start of the impact current. The PLC receives the system command to generate the action logic and returns the contact logic status and fault information to the system. The network implements the power supply loop control and monitoring system. Protection measures for power distribution cabinet include overcurrent, short circuit, open circuit, overvoltage, undervoltage, temperature is too high, smoke sensing, and has a fault indication, abnormal alarm in a timely manner. The power supply of the network power supply protection device is at least 20 minutes of power failure. In the event of a power failure, there is sufficient time for the system operator to perform the correct handling action.
It is also necessary to use a signal ground independent of the protection ground for use by the network system and the distributed control system. Power grid lightning protection rely on the scene to solve the power distribution system.
3 screen body of the cooling system
Attention to the choice of components, such as power supply, driver IC, are selected in the higher temperature range of normal work;
Drive control circuit using static small current driver IC;
The use of advanced PWM pulse width adjustment technology, effectively improve the screen of the luminous efficiency, reduce the screen power consumption;
The use of a large number of low-power integrated circuits as the main drive circuit, not only effectively reduce the IC's operating temperature, but also reduces the total power consumption of the system. "Safe power" has become a major feature of Hongxiang technology display;
Driving circuit board using "four-layer board", increasing the drive current flow area, the effective drive current will be reasonably dispersed, further reducing the operating temperature;
Screen DC power supply cooling fan directly blows the screen body, reducing the light-emitting components and drive IC operating temperature;
Screen body structure designed to meet the characteristics of the hot convection channel, to ensure that the rear of the screen air circulation, strengthen the screen body cooling capacity;
The use of better thermal radiation decorative structural materials, to strengthen the screen body itself cooling capacity;
Set up temperature monitoring system, through the heat sensor, so that the screen with over-temperature automatic alarm and automatic adjustment function;
Combined with the temperature control system, using a certain number of air conditioners, to achieve rapid temperature adjustment.
4 lightning protection
From the current use of lightning protection devices, lightning rod, mesh belt, Faraday cage to prevent the building was hit by lightning damage better. However, in the process of lightning drop, the lightning current left in the electromagnetic field on the electronic equipment has a great damage, for this manufacturer to use a special lightning protection equipment to protect the power lines and signal lines can prevent the induction lightning on the display Screen electronic equipment and damage, when the lightning occurred moment, lightning protection equipment can quickly discharge, the introduction of a strong current to the earth, so as to protect the LED display body and its ancillary equipment foolproof.
Because the display is mounted on the side of the building, within the lightning protection of the building, the display can be viewed as an electrical device within the building.
Anti-lightning measures is to monitor the steel structure and the main bar of the building connection. The main bar can generally be used as lightning protection grounding. (8 / 20us) power arrester, the arrester grounding can be connected to the three-phase five-wire PE. Grounding is the key to lightning protection, usually using a joint grounding. To the power distribution cabinet PE phase copper row as the grounding row, the power cable protection ground PE, the box of the switching power supply grounding wire, power lightning arrester grounding line were connected to the ground row, grounding row and screen steel structure connection. Grounding resistance is less than 1Ω.
5 electromagnetic interference protection
All circuit boards are coated with electromagnetic shielding material to prevent the impact of electromagnetic interference signals on the control circuit.
6 noise reduction processing
As a result of the media with the noise and analog conversion of quantitative noise, greatly affect the display of the video display, you must take some noise reduction measures. Our company has developed a large-scale programmable integrated circuit with recursive and median filtering function of the LED control system, to better improve the full-color video image viewing effect.
7 network security
Configure the anti-virus software system and firewall, to prevent the invasion of computer viruses.