How can smartphones switch between two resolutions(HD and QHD) with same screen hardware underneath?
In: Technology
the screen has a set number of pixels. say 1920×1080. meaning 1920 pixels by 1080 pixels. for any resolution smaller the screen still needs to use all 1920×1080 pixels, but since your resolution is smaller, it uses a technique called down scaling. one super simple method is to just set nearby pixels are identical in the lower resolution (called nearest neighbor). but that looks like crap. so they use more complicated down scaling algorithms to try and make the image look better. [https://en.wikipedia.org/wiki/Comparison_gallery_of_image_scaling_algorithms](https://en.wikipedia.org/wiki/Comparison_gallery_of_image_scaling_algorithms)
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