If you are using a character mode display you need to look at the Font Bitmap for the controller that is on the particular module you are looking at. These tables are typically in the controller IC data sheet. The font table is contained in a ROM on board tic controller and often the manufacturer of the character mode LCD controller will have several different dash number versions of the controller with various different font tables.

An alternative is to look into using a graphics LCD module. These have all points addressable pixel level control of the LCD glass. For these the font table is contained in the code space of the microcontroller and referenced as needed to derive the pixel data for each character at the time they are written to the display memory on the graphics LCD display controller.

There is at least one type of LCD display controller that operates in graphics mode AND supports an onboard font bitmap table ROM. This part called the Toshiba T6963C also has a mode where a complete user selectable font table can be downloaded to the memory that is attached to the contoller. If this type interests you then you need to search for graphics module with an inbuilt T6963 controller chip.

Michael Karas