What is the difference between digital display and dot matrix graphic display in LED electronic display?
Author:Pipi Time:2021-09-13 12:29 Browse(255)
In other words, what is the difference between the two?
In other words, what is the difference between the two? It's no different. Dot matrix is also a display screen, but it's made up of a small module. Because of its low brightness, it's used for indoor use, and it's not waterproof.
outdoor use is led. Check the original post>

What is the difference between digital display and dot matrix graphic display in LED electronic display?

for multi LED display.
in order to simplify the circuit, reduce costs, and save system resources, all n-bit segment selection codes are connected in parallel, It is controlled by a 74HC595.
because the segment selection codes of all LEDs are controlled by a 74HC595 parallel output port.
therefore, in each instant, n-bit LEDs will display the same characters.
in order to display different characters for each LED.
the scanning method must be adopted, that is, only one display character is used in each instant.
in this instant.
74HC595 parallel output port outputs the corresponding segment selection codes, The bit selection controls the I / O port to send the gate level to the display bit, so as to ensure that the corresponding characters are displayed in the bit.
in this way, the characters should be displayed in each time-sharing display bit.
because 74HC595 has the latch function.
and it takes a certain time to select the serial input section code, the visual persistence effect can be formed without delay.
in this way, the bit selection can display the corresponding characters    When n-bit LED is displayed.
only one 74HC595 is needed, and the cost is the lowest    Practice has proved that the performance of this multi bit LED display method is stable. If a 74HC595 is cascaded, 32-bit LED display can be realized without increasing I / O port line.
the author has done 48 bit LED display.
it should be stable and reliable.
http://molihong.cn/rjyv/30145.html .
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