LED display system design analysis

1. The power supply circuit adopts standard computer power supply and shielding measures, and the power supply noise filter switching power supply DC stabilized power supply standard program.

2. Good electromagnetic shielding of power supply and circuit.

3. The analog signal ground, digital signal ground, structural safety and power supply ground are separately routed to effectively prevent crosstalk.

4. Design specifications for printed boards, including strict regulations on component arrangement, wiring, filtering, etc. Use an oscilloscope to measure the noise interference on the ground of each printed board, the peak value does not exceed + 50mv.

5. The interface circuits in the board, between the boards and between the chassis have anti-interference design.

6. The system field wiring, signal line and AC power line (power line) are strictly separated.

7. Good grounding system, strictly grounded.

8. In order to improve the reliability of the system, the power supply adopts derating measures, and reserves sufficient margin.

9. The external interface is driven by balanced current.

Second, LED display system fault-tolerant design

1. There are various fault tolerances in the communication protocol: the communication data is constantly refreshed, and any accidental errors can be quickly corrected.

2. The software adopts various fault-tolerant measures.

3. Various fault-tolerant measures are adopted for data storage.

4. Program misoperation, prompt in real time.

5. Use reasonable judgment to eliminate illegal data.

6. The refresh rate of the display screen is above 240HZ to ensure that the display screen is stable and flicker-free.

3. Tolerance design of LED display system

1. All components have a margin of more than 20%, which increases the service life of components.

2. The interface circuit allows the component input voltage to fluctuate ± 5%, and the circuit can still work reliably.

3. The dynamic characteristics of the device have greater redundancy to ensure that the system can still operate reliably when the characteristics of the components change.

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