Introduction to different types of liquid crystal display modules

- Jul 25, 2018-


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The liquid crystal display module (LCM) can be classified according to the processing technology or according to the type of display content. According to the processing technology, it is divided into: common module, COG, TAB, COF module; according to the type of display content: graphic type, character type, segment type.

    The liquid crystal display module is a component that assembles a liquid crystal display device, a connector, an integrated circuit, a PCB circuit board, a backlight, and a structural member. The English name is “LCD Module”, referred to as “LCM”, and Chinese is generally called “liquid crystal display module”. In fact it is a commercial part. According to the provisions of China's relevant national standards: only the non-detachable integrated components are called "modules", and the detachable is called "components". Therefore, the name of the specification should be called "liquid crystal display component". But for a long time people have become accustomed to calling it a "module."

    Early LCD monitors only produced LCD screens, and the driver part was designed and manufactured by the customer. At present, LCD manufacturers connect LCD screens to COB boards (PCB boards with ICs) and make LCD modules. LCD module character division module and image module.

    The character module has 1~4 lines, divided into 16~40 blocks, and each block consists of 5x7 dot matrix. Each block is driven separately.

    Character modules can use TN-LCD or STN-LCD, but image modules use STN-LCD. The backlight of most modules can be EL or LED.

    The image type module is composed of a plurality of rows and columns of dot matrix pixels, each of which is individually driven to display text, images or simultaneously display text and images. Image modules require IC control, and some of these control ICs are also mounted on the LCD module.