Static display and dynamic display.
Answer analysis:
LED displays mainly have two display modes: static display and dynamic display.
1. Static display:
- Features: When the LED display needs to display a certain character or graphic, the corresponding light-emitting diode will be constantly turned on or off. At this time, the single-chip microcomputer or control system only needs to send the data to be displayed, and then no longer control the LED display until the next time the display content needs to be updated, and then send new display data again.
- Advantages: The displayed data is stable, the brightness is high, and the processor (such as CPU) time is less.
- Disadvantages: Each display unit requires a separate display drive circuit, so more circuit hardware is used, and more I/O resources are occupied.
2. Dynamic display:
- Features: Dynamic display is achieved by lighting up each digital tube or pixel on the LED display one by one. For each LED display, it will be lit once every period of time, that is, the processor will refresh the data of the LED display at all times to ensure the continuity of the display.
- Advantages: Since it utilizes the human visual persistence effect, it uses less hardware, occupies less I/O resources, and saves printed circuit board space. At the same time, this display method is relatively low in cost and the circuit is relatively simple.
- Disadvantages: Since it is lit in turn, in some cases you may feel that the displayed data has a slight flickering feeling, and it occupies more processor time.
In general, static display and dynamic display each have their own advantages and disadvantages. In practical applications, it is necessary to choose the appropriate display method according to specific needs and scenarios.