How to calculate the size of outdoor LED screen

Time:2018-12-11 Views:1339

LED electronic display is an important part of the LED panel, if there is a problem with the panel, it will directly affect the overall quality of the LED display!Therefore, how to distinguish the quality of LED panel is a concern of LED display businesses. The following are some common methods to detect LED panel.

A, material

1. LED unit plate

In order to compete at a low price, some LED panel manufacturers use cheap flame retardant paper board or single-sided fiber board as the PCB circuit board of LED lamps.Because all-fiberglass PCB boards are expensive.At the beginning, there is no difference. Generally, within a year, it will be broken due to dampness, uv damage, oxidation and other reasons, leading to the abandonment of the whole LED panel.High quality LED panel must be double-sided fiberglass PCB board, although the cost is high, but the quality is guaranteed.

2. IC device

Observe whether the brands of IC devices used are consistent.The type of IC used and the number of IC used are also enough to affect the quality of LED panel.Some LED display manufacturers, in order to save costs, will deliberately reduce the number of IC production unit board, or other brands of IC.

3. Lamp beads and chips:

It is impossible to tell whether a lamp bead is good or bad with the naked eye.Can rely on test of long time only, what the expert says ageing is tested.General LED display manufacturers practice is: factory power, check whether the LED display can operate normally, is not after a long time of aging test.Because there are time costs and labor costs.

Ii. Welding quality

Check whether there is any leakage or misalignment of the patch, and whether there is any burr short circuit of the pin.Check whether the solder joints of the straight plug are smooth and round, whether the plate surface is clean and neat, and there is no welding leakage.Check the luminescence dot array interpolation smoothness and ink color consistency.

Three, power test

Power on test (refer to the steps of "performance test report") :

(1) electrification test luminous dot array consistency;

(2) electrification test on the line drive pipe CEM4953 whether effective protection;

(3) on the test signal transmission capacity.

The above is about the common method of testing the quality of LED unit board, I hope to help LED display businesses.In addition, the quality is the king, and the rejection of cheap and shoddy LED display screen is what the manufacturer needs to do, so as to avoid damage to the unit board that affects the normal work and subsequent unnecessary maintenance.