AMOLED (Active-Matrix Organic Light-Emitting Diode) displays have a different display effect compared to other display technologies for several reasons:

1. Self-emissive pixels: In AMOLED displays, each individual pixel emits its own light when electrically stimulated. This means that each pixel can be turned on or off independently, resulting in true blacks and infinite contrast ratios. This leads to more vibrant colors and deeper, more immersive visuals.

2. Wide color gamut: AMOLED displays typically have a wider color gamut, which means they can reproduce a larger range of colors. This results in more accurate and vivid color representation, making images and videos appear more lifelike and vibrant.

3. Flexible and curved displays: AMOLED technology allows for the production of flexible and curved displays. This enables manufacturers to create unique form factors and designs for products such as curved TVs and smartphones with wraparound screens. These curved displays provide a more immersive viewing experience and can enhance the overall aesthetic appeal of the device.

4. Faster response times: AMOLED displays have faster pixel response times compared to other display technologies. This means that fast-moving objects on the screen, such as during gaming or video playback, appear smoother and more fluid, reducing blurring or ghosting effects.

5. The P array of AMOLED: the struggle between display effects and lifespan.  When it comes to the downsides of AMOLED, the first thing that comes to mind is the P array, namely the Pentile array.  Samsung was the first company to massively produce OLED panels and to use P array.  The Galaxy S4 first use the P array called Diamond Pixel, which head down a different path with the standard RGB alignment.    imply speaking, RGB type equally arranges the sub-pixels of the three original color of red, green and blue, while the sub-pixels of RGB will not be equally arranged in P array, and it shares the pixels, so the actual pixel density of P array is lower than that of RGB.  Which leads to the fact that even with the same resolution, P array are not as clear as RGB, so it is often called "big fruit variant screen".

However, it should be noted that AMOLED displays may also have some drawbacks, such as potential burn-in issues with static content and prolonged exposure to bright images. Manufacturers continue to develop and improve AMOLED technology to address these concerns and provide better display quality and longevity.