The touch screen and LCD screen of the mobile phone are the components of the mobile phone screen. The touch screen is used for touch operation, and the LCD screen is used to display images. smart phone lcd    ，Together, the two screens are used to display images and process images and text.

If the phone display is normal and the touch does not respond, the touch screen is broken. If the display is abnormal, such as the screen is damaged, there is obvious liquid crystal outflow, etc., it is the inner screen, that is, the display screen is broken.

Usually, the touch screen and the display are glued together. Some display screens or touch screens can be replaced individually, while others can only be replaced as a whole, which is what people call a screen assembly. Mobile phone displays and touchscreens need to be assembled and tested through the packaging process.

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