Pixel
Pixel
The smallest colored point that makes up a digital image or display.
In Simple Terms
A pixel is one of the tiny colored "dots" that make up the screen on your phone or TV, or any digital image. Think of a mosaic made from lots of colored tiles. From a distance it looks like a single picture, but up close you can see it's actually made of small individual tiles. Pixels work the same way. Each of these tiny dots holds its own color data, and when countless dots come together, they form a single, sharp photo or video.
Behind the Name
"Pixel" is a blend of "picture" and "element" — literally, a "picture element." The word captures exactly what it is: the smallest building block that makes up a digital image. Every image and every character you see on a screen is made up of countless tiny pixels working together.
Take a Closer Look!
A pixel is the smallest colored unit (or dot) that makes up a computer or phone display, or a digital image.
Digital images are built from countless pixels arranged in a grid.
For example, zoom way into a phone or TV screen and you'll see tiny points of light called "subpixels," each glowing in just one color: red, green, or blue.
The arrangement varies by display: some pack in equal numbers of red, green, and blue dots, while others use more green and fewer red and blue dots, since human eyes notice brightness changes more than color differences.
Whatever the layout, it takes a full set of these subpixels working together to form a single pixel capable of displaying a wide range of colors.
The more pixels a display or image has, the finer and smoother it looks.
The term "resolution" refers to how many of these pixels are packed into a screen.
Display standards like Full HD and 4K also describe the total number of pixels across the whole screen.
Similarly, "pixel count," the term used for the size of a photo from a digital camera, also refers to the number of pixels.
Camera sensors work the opposite way, though: each point can only capture one color, red, green, or blue, and the camera calculates the missing two colors using data from surrounding points to complete the full color for that single point.
A higher pixel count means a larger, more detailed photo, but overall photo quality depends on many factors, including sensor size, lens performance, and image processing.