Look for yourselfThis method is quite simple. Each pixel in the AMOLED display emits its own light meaning that the black parts of your device’s screen are areas where pixels are not lit up. This means that an entirely black image on an AMOLED screen should not emit light. To try this, download this, download an AMOLED test image which is all-black and save it to your handset. Open the image fully with the navigation bar and status bar hidden. Then turn the brightness to maximum and take your smartphone to a dark room. In case you see any light from your device, then it has an LCD display. When the screen remains completely black, you have goat an AMOLED display.
Check the spec sheetThis method is a bit precise. To start the process, go to GSM Arena and look for your device model. Once you find it go to the spec page and lock for ‘LCD’ or ‘AMOLED’ keywords on the Display category.
AMOLED vs LCDColor gamut is one of the noticeable difference between the AMOLED and LCD display. The AMOLED screen tends to provide a greater range of the color options than the LCD screen, thus resulting in more vibrant looking images. AMOLED display has additional blue and green saturations. These colors tend to be most powerful in subpixel arrangement. These additional saturations produces results that they do find as slightly unnatural looking. The LCD displays tend to overcompensate into the reds with extra subdued greens. Color accuracy is another notable different, more so when it comes to the whites. The AMOLED displays tend to display more accurate results, whereas the LCD screens produce a slight blue tint. One downside of the AMOLED display is that it has different LEDs that have different life spans. This means that the individual RBG light finally degrades at different rates.
Source: Android Pit
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