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The difference between LCD and LCM?

The difference between LCD and LCM?

Mar 22, 2023

LCD is the abbreviation of Liquid Crystal Display (Liquid Crystal Display).


LCD is a display screen (LCD liquid crystal screen), and LCM is a collection of various devices including LCD and chips, circuit boards, etc. that control LCD display mode and content. It can be said that LCD is the foreground of the display content, and LCM is the entire operating system including the foreground.


1. LCD=Liquid Crystal Display


2. Mainly refers to: the LCD panel, including polarizers, color filters, liquid crystal glass (glass clip liquid crystal), TFT control parts


3. LCM=Liquide Crystal Module liquid crystal display module


4. Including: LCD panel and the following accessories, mainly backlight module, with enhancement film, light transmission film, reflector, diffusion film, bracket, LED lamp (light source), FPC and components and devices


5. But in fact, generally speaking, the two are regarded as the same meaning.


The main differences between COG LCD and LCM are:

1. LCM has a font library; LCD basically does not have a font library.


2. LCD is a liquid crystal display, which generally refers to a separate screen; LCM is a liquid crystal display module, which includes corresponding driving circuits and control circuits, and can be directly connected to a single-chip microcomputer.


The liquid crystal module is simply LCD screen + LED backlight + PCB board + iron frame. The modules are mainly divided into screen and backlight components. The two parts are assembled together, but operate independently of each other (ie, the circuits are not related). The principle of liquid crystal display is that the backlight unit emits uniform surface light, and the light is transmitted to our eyes through the liquid crystal screen. The role of the screen is to process this light pixel by pixel to display the image.

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