The dot matrix graphic LCD module is also a type of dot matrix LCD module, which is characterized by the continuous arrangement of dot matrix pixels, with no space between rows and columns in the arrangement. Therefore, it is possible to display continuous and complete graphics. Since it is also composed of X-Y matrix pixels, it can display not only graphics but also characters.
The three types of dot matrix graphic modules：
1. Row and column driven
This is a kind of module that must be connected to a special controller, the module is only assembled with a general line driver and column driver, this kind of driver is actually only the general drive output of the pixel, and the input is generally only 4-bit data input, shift signal input, latch input, AC signal input, etc., such as HD44100, IID66100 and so on, this kind of module must be connected to the control circuit, such as: HD61830, SEDl330 and so on to be able to connect with the computer. The number of such modules is the most, is also the most common. Although it requires the use of self-contained controllers, but it also leaves the customer the freedom to choose different controllers.
2. Row and column drive-control type
This is a type of module that can be directly interfaced with a computer and relies on the computer to directly control the drive. The column driver used in this type of module has an I/O bus data interface, so the module can be directly hooked up to the computer bus, which eliminates the need for a dedicated controller and is therefore beneficial to the overall system cost reduction. It is very suitable for users who have a small number of pixels, a small number of functions and are very familiar with the programming of computer software. However, it may take up part of your system's resources.
3. Row and column control type
This is a type of dot matrix graphic LCD module with built-in controller. It is also one of the more popular types. This type of module is not only equipped with row and column drivers such as the first type, but is also equipped with special controllers such as T6963C. This kind of controller is the interface between the LCD driver and the computer, it is the simplest way to be controlled by the computer to receive and feedback all kinds of information from the computer, after their own independent information processing to achieve the management of the display buffer, and to provide the driver with all kinds of signals and pulses needed to manipulate the driver to achieve the display function of the module.
This kind of controller has its own set of special instructions and its own character generator CGROM. This kind of module makes the user free from the design, processing, production and so on a series of work for the controller, and makes the computer avoid the tedious control of the display, saving its host system an internal resource.
The above is an introduction to what is the dot matrix graphic LCD module and the three types of dot matrix LCD module, I hope it will help you.
