LCDLCD screens are widely used in displaying products and are currently the most commonly used display screens.understandLCDBasic knowledge of LCD screens is essential for better product selection.ProcurementLCDWhen using an LCD screen, it is necessary to understandLCDandLCM，They reallyWhat's the differenceWhat about it?

LCDYes, it is【Liquid Crystal Display】The abbreviation is LCD display screenIt is a display device consisting of top and bottom components2Glass, polarizing film, liquid crystal andITOComposed of membranes and other components.

LCM【Liquid Crystal Module】The abbreviation. It is a liquid crystal module, also known as a liquid crystal module.YesLCDLCD screen, backlight, iron frame, control chip,PCBThe components assembled together with boards and other parts mainly come in blue film, yellow green film, and other colors.LCDLCD screen is justLCMPart of it.

All LCD screens can be referred to asLCDBut not all LCD screens are calledLCM.

LCD: Liquid Crystal DisplayLCD (Liquid Crystal Display)

LCM: Liquid Crystal ModuleLCD module

LCD display（LCD）It is a display component based on liquid crystal, which controls the rotation direction of liquid crystal molecules by controlling the voltage at both ends of the liquid crystal molecules, and then controls the polarization transmittance of each pixel point to achieve the display purpose. ButLCD display module（LCM）It refers to using a liquid crystal display（LCD）Control driver chipPCBComponents assembled together with various parts such as boards, backlights, structural components, and connectors,

LCMandLCDyesThe relationship of 'inclusion',LCDJust composedLCMOne of the components is shown in the following figure:

LCD TV, smartphoneMP4The display screens used in products such as tablets are also LCD display devices,LCDApplication scenariosThere are a lot of them.

Main differences

1.LCMWith a font library,LCDBasically without a character library.

2.LCDIt is a liquid crystal display, usually referring to a separate screen;LCMIt is a liquid crystal display module, which includes corresponding driving circuits and control circuits, and can be directly connected to a microcontroller.

Simply put, the LCD module isLCDscreenLEDbacklight panelPCBboard Iron frame.The module is mainly divided into screen and backlight components. The two parts are assembled together, but they work independently of each other(The circuit is unrelated).

The principle of LCD display is that the backlight component emits uniform surface light, which is transmitted to our eyes through the LCD screen. The function of the screen is to process these lights by pixels to display images.

Extended related reading
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