What is "Keystone Correction"?

Many projector users have encountered a situation where a good picture does not completely cover the projection curtain, and the picture may appear trapezoidal instead of a regular rectangle. This is when keystone correction is needed to adjust the projection screen to a standard rectangular projection screen to ensure the best viewing experience. This process is called "trapezoid correction" in projection industry terminology, and we will analyze it from the following three dimensions.

1. optical or digital

Keystone correction usually has two methods: optical keystone correction and digital keystone correction, optical keystone correction is to adjust the physical position of the lens to achieve the purpose of adjusting the keystone, another digital keystone correction is through the software method to achieve keystone correction. At present, almost all domestic projector manufacturers have adopted digital keystone correction technology.

2. manual or automatic

As the name implies, automatic requires manual operation of the remote control to achieve screen correction, while automatic does not. The way to open the two correction methods is as follows.

Manual: open the projection - enter the settings - click 'keystone correction' - up, down, left and right manually correct one by one"

Automatic: Turn on the projector to complete the correction automatically.

3. Vertical or Horizontal

At present, almost all domestic manufacturers of intelligent projectors have adopted digital keystone correction technology, and the majority of projectors using digital keystone correction support vertical keystone correction function, that is, the projector can adjust its own height in the vertical direction, the resulting trapezoid, through the projector for vertical keystone correction, you can make the screen into a rectangle, thus facilitating the use of users. There are also some manufacturers have achieved the horizontal trapezoid correction, to protect the horizontal direction of the picture viewing effect.