What Is QHD?

QHD stands for quad high definition, or quad HD. It is a resolution of 2560 pixels across by 1440 pixels down, in the same 16:9 shape as FHD and 4K. The name comes from the pixel count: 2560 × 1440 holds exactly four 1280 × 720 HD images, two across and two down.

On monitors, QHD and 1440p mean the same thing, and many makers also call it WQHD, adding W for wide. The extra letter does not change the resolution. A 27 inch QHD monitor became the standard step up from FHD for office, design and gaming desks, because it adds clear detail without the graphics load of 4K.

Watch the capitalisation on phone specifications. Lower-case qHD means quarter HD, 960 × 540, a low resolution used on small phones and embedded screens around 2011. It is a different format with a quarter of the pixels of FHD.

Pixel density, measured in pixels per inch (PPI), shows how sharp a resolution looks on a given screen size. The table compares QHD with FHD and 4K on a small and a large screen.

At 27 inches, FHD sits below the density where most people at arm’s length stop seeing pixels, QHD sits just above it and 4K goes well beyond it. On a 15.6 inch screen, FHD is already sharp, so QHD and 4K add less that you can see.

QHD is not 4K. True 4K UHD is 3840 × 2160, with 2.25 times the pixels of QHD.

Calling QHD 2K is common in marketing but not strictly right. In cinema, the Digital Cinema Initiatives (DCI) specification defines 2K as 2048 × 1080 and 4K as 4096 × 2160, named after the roughly 2,000 and 4,000 pixel widths. By that logic, FHD at 1920 wide is the closer match to 2K, and QHD at 2560 wide sits between 2K and 4K. Some sellers call it 2.5K for that reason. When a datasheet says 2K, check the pixel count before comparing screens.

QHD asks the graphics output for about 78% more pixels than FHD on every frame. That is easy for current integrated graphics at 60 Hz on a desktop, but it matters on a fanless system that is also running video decoding or AI inference, and at higher refresh rates.

QHD is far less common on industrial monitors and panel PCs than on office and gaming monitors. Industrial panel makers concentrate on FHD for most sizes and 4K UHD for large, medical and defense screens, because those formats match the video, camera and broadcast equipment the displays connect to. An industrial project that needs more detail than FHD therefore usually moves straight to 4K.

The 27 inch industrial monitors in our range show the pattern: FHD models for general control and marine use, and 3840 × 2160 models for rack mount defense consoles. Our 32 inch industrial monitors follow the same split, with FHD for control rooms and 4K for surgical and defense work.

QHD does appear on some rugged laptops and tablets, where a sharp image at a short viewing distance matters more than matching a video standard. If a QHD screen is specified, check that spare panels will stay available for the life of the equipment.

For a new industrial screen, the choice usually comes down to three questions: how close the viewer stands, what the screen shows and what drives it.

If operators stand a meter or more away and the screen shows buttons, values and simple graphics, FHD is normally enough even at 27 inches. If engineers sit at a desk and work with drawings, code, maps or several windows at once, the extra space of QHD or 4K pays off. If the source is a camera, a microscope or a broadcast feed, match the display to the video format, which in industrial and medical work is usually 1080p or 2160p rather than 1440p.

The computer matters too. A compact fanless system with integrated graphics drives FHD or QHD comfortably, and most current ones handle 4K at 60 Hz, but heavy 3D, video walls or high refresh rates may need a discrete GPU. Our industrial monitors list the native resolution of each model, so the screen and the computer can be matched before anything is ordered.

We supply industrial monitors and panel PCs at the resolution the application needs, and configure and test each one with its computer and video sources before it ships.