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Do you know what is a dot matrix graphic lcd module


The dot matrix graphic lcd module is also a type of dot matrix liquid crystal module. Its characteristic is that the dot matrix pixels are arranged continuously, and there is no space between rows and columns in the arrangement. Therefore, continuous and complete graphics can be displayed. Since it is also composed of X-Y matrix pixels, it can also display characters in addition to displaying graphics.

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The following are the three types of dot matrix graphic lcd module:
1. Row and column driven
This is a module that must be connected with a dedicated controller. The module is only equipped with a general-purpose row driver and column driver. In fact, this kind of driver only has a general drive output for pixels, and the input terminal is generally It is only the data input terminal with less than 4 bits, the shift signal input terminal, the latch input terminal, the AC signal input terminal, etc. The graphic lcd module manufacturer tells you that this kind of module must be externally connected to the control circuit before it can be connected to the computer. The number of such modules is the largest and most common. Although a self-configured controller is required, it also leaves the freedom for customers to choose different controllers by themselves.
2. Row and column drive-control type
This is a module that can directly interface with the computer and rely on the computer to directly control the driver. The column drivers used by this type of module all have I/O bus data interfaces, and the module can be directly hung on the bus of the computer, thus eliminating the need for a dedicated controller, so it is important to reduce the cost of the whole system beneficial. It is very suitable for those users whose number of pixels is not large, the functions of the whole machine are not many, and they are very familiar with computer software programming. However, it may take up some resources of your system.
Three, row and column control type
This is a dot-matrix graphic LCD module with a built-in controller. It is also a popular type. This type of module is not only equipped with row and column drivers like the first type, but also a dedicated controller for assembly. The graphic lcd module manufacturer tells you that this kind of controller is the interface between the LCD driver and the computer. It is controlled by the computer to receive and feed back various information from the computer in the simplest way. It realizes the display through its own independent information processing. Buffer management, and provide the driver with various signals and pulses required, and manipulate the driver to realize the display function of the module, etc.
This kind of controller has its own set of special instructions, and has its own character generator CGROM. Users must be familiar with the detailed instructions of this kind of controller before they can operate. The graphic lcd module manufacturer tells you that this kind of module frees the user from a series of work such as the design, processing, and production of the controller, and enables the computer to avoid the cumbersome control of the display, saving an internal resource of its host system.

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