Segmented multi-path liquid crystal display achieving driving by I/O port of MCU and method

摘要: The invention provides a segmented multi-path liquid crystal display achieving driving by an I/O port of MCU and method. comprises LCD screen, metal pins, LED backlight source, PCB the MCU, wherein is arranged on surface PCB, connected with pins screen means wiring through PCB; source PCB. By tristate function upward pull resistance downward resistance, voltage VDD, 1/2VDD 0 can be produced; port, digital signals converted into analog signals, 1/3duty 1/2 bias alternating current waveform frame frequency being 83 HZ produced, control over achieved. method have advantages that adoption SMT bonding technique, structure compact, size small; turning-on turning-off controlled according to external environment, energy saved, cost lowered, very good market prospects popularization value are