The graphic lcd module is a member of the dot matrix module family. Its main feature is that the dot matrix pixels are arranged continuously, and there is no empty space between the rows and columns in the process of arrangement. So it can display continuous and complete graphics. In addition to displaying graphics, the graphic lcd module can also display characters, because it is also composed of X-Y matrix pixels.

This type of graphic lcd module must be connected to a dedicated controller, and its module is also equipped with general row and column drivers. This type of driver actually only has a general driver output for pixels, and a general input. 4-bit or less signal input, data input, latch input, AC signal input, etc.
This kind of graphic lcd module must be connected with an external control circuit before it can be connected to the computer. The number of such modules is the largest and more common. Although it is necessary to use a self-configured controller, it also leaves customers with the freedom and power to choose different controllers.