How to choose the appropriate LCD display module, Tian Xianwei editor will tell you

When selecting a suitable LCD display module, the following three key indicators need to be considered first.

Display resolution: The number of pixels in the LCD display module must be greater than the maximum number of pixels required for product display content.

External dimensions: The size of the LCD display module must adapt to the structural dimensions of the product chassis.

Circuit coordination: The selection of the LCD display module circuit will directly affect the circuit design of the MPU system. Circuit integration requires comparing MPU system resources and module circuit characteristics for comprehensive consideration.

Built in driver LCD display module, equipped with MPU with LCD display driver, such as ARM9 series.

The built-in controller has a LCD display module, and there are various models of controllers with unique performance, such as those with a Chinese character library, those with a 2D graphics accelerator, and those with only display RAM, which can meet the needs of various MPU systems.

The interface form between the module and MPU: parallel interface, divided into INTEL8080 and MC6800 timing; Serial interface, including 3-wire/4-wire SPI serial interface, RS-232 interface, and I2C bus interface.

Adapt to MPU system logic power supply: The power supply voltage of the module is also consistent with the signal level of the module interface. It is required that the working power supply and signal voltage of the module are also consistent with the power supply and signal level provided by the MPU system, reducing the level conversion circuit for signal connection.

Power consumption of the circuit: It is necessary to evaluate whether the MPU system power supply can support the working state current, sleep state current, and backlight current of the circuit.