Light emitting diode (LED) display driver circuit
Source: InternetPublisher:MartinFowler Keywords: LED light emitting diode driver circuit display driver Updated: 2021/01/16
Shown is a light-emitting diode ( LED ) display driver circuit , also known as a microprocessor display interface circuit. While the microprocessor is working,
information such as working status and temperature is output through the power display circuit (interface) in the CPU, and is amplified by five transistors to drive
the light-emitting diodes for display.
The emitter of each drive transistor arm (PNP transistor) is connected to the +5 V power supply and the base is controlled by the microprocessor. When the microprocessor outputs
a low level, the base level of the transistor decreases, and the relationship between the emitter and collector of the transistor The +5 V power supply is applied to the light-emitting diode through the transistor
to cause the light-emitting diode to emit light.
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