2650×1440 or QHD (Quad HD), WQHD (Wide Quad HD), or 1440p, is a display resolution of 2560×1440 pixels in a 16:9 aspect ratio. Seems little difficult to grasp? Before moving on to more technical terms let us understand some important terms in a very simple language if you are not familiar with them.
The aspect ratio of any device is the ration of its width to height. In simple terms, it is the ratio you get by dividing the width of the device to height( for resolution 320×240 = 320/240 i.e. 4:3). Most commonly used aspect ratios are 16:9, 4:3 etc.
Its the number of pixels which a display device can show. Higher the resolution of the device, higher the no of pixels a device can display. Hence, it provides a wider visible area and very crispier images. 2560×1440 means it can display 2560 pixels horizontally and 1440 pixels vertically.
2560×1440 (QHD,WQHD)- Is it 2K resolution or 2.5K ?
Here K stands for no of pixels a device can display in thousands. So, 2k stands for 2 thousand pixels. While QHD stands for Quad High definition that is it has four times as many pixels as HD (720p). It is also called WQHD i.e. Wide Quad High Definition. Technically its all unnecessary as all HD resolutions are wide but its also helpful to differentiate from the resolution of 960×540 which is called as qHD(small q and capital Q can be confusing sometimes so WQHD is used). 1920×1080 resolution is called to have 2k resolution has it has an equivalent number of pixels (1920 pixels exactly). While 2560×1440 has around 2.5K pixels and so it must be called 2.5K instead of a 2K resolution? Comment your views below.
Why is 2560×1440 important?
SDTV or standard-definition Television system uses an aspect ratio of 4:3 and it’s not considered optimum for high definition television(HDTV) broadcast. So, 2560×1440 resolution with aspect ration 16:9 is considered by the ATSC in the late 1980s to become the standard HDTV format. It has exactly the 4 times the width and 3 times the height of the VGA. Because of practical technical constraints, they have chosen now the well-known 16:9 formats with twice (HD) and thrice (FHD) the VGA width instead.
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