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What is the difference between LCD and AMOLED screen?

- Aug 07, 2018 -

              What is the difference between LCD and AMOLED screen?


AMOLED


AMOLED is actually the abbreviation of Active Matrix Organic Light Emitting Diode, the core is still in Light Emitting Diode, which is LED. Although LEDs are more common in everyday life, in the screen, each LED is very small in size and is divided into three sub-pixel groups of red, green and blue, and then different colors are formed, and the sub-pixels are arranged. The way will also affect the entire display.

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The O in AMOLED stands for Organic, which is "organic". Simply put, a series of organic thin film materials are used between the positive and negative electrodes to achieve the purpose of illuminating.


Finally, AM stands for Active Matrix, which is relative to the Passive Matrix and refers to the way each OLED pixel is driven. In the Passive Matrix, the control of each pixel is realized by a complex electrode network to achieve charge and discharge of a certain pixel. In general, the Passive Matrix is controlled at a relatively slow speed and has a slightly lower control precision. 


Unlike the Passive Matrix, the Active Matrix has a TFT and capacitor layer on each LED so that when a row is energized to activate the intersecting pixel, the capacitor layer in the pixel can be refreshed between refreshes. Maintaining a state of charge allows for faster and more accurate pixel illumination control.