Screen door effect

SDE effect

Screen door effect

You may have noticed that giving an image a closer look makes you seek the visible gaps between the pixel on an electronic screen or a projector screen. This problem takes place because the spaces between the pixels are backlit but are not lit. It is called the screen door effect (SDE).

Screen door effect on a screen
Screen door effect on a magnified image

SDE causes the black visual grid you always see on a digital projector or a Virtual Reality headset. It is only noticeable when you take a look at a very close range. Other than projectors, the screen door effect is also quite common in VR headsets.

A closer look at how modern LCD projectors work will show that there  are several pixels on the LCDs. They are meant to improve quality of the image. However, the screen door effect significantly reduces the quality of an image on your display. The screed door effect can make you experience some discomforts.  Such discomfort includes headaches, eyestrain, and distraction when you are using a low-quality display screen. Lower quality screens have lower pixel density so even the lower dot per inch.

In virtual reality devices, the problem is known to suggestively affect your performance in some games. Some people are perceptively distracted more than others. However, for those actively engaging in a fast-paced game, the SDE is significantly less noticeable.

How to address the Screen door effect

The straightforward solution for this problem is high-density pixels on the viewer’s screen. You may have noticed that high pixel density will ensure that there are more pixels close together. If this technology is successfully implemented, the gap between pixels will be meaningfully reduced. You also need to note that the more pixels on a screen the more processing power is required.  The high number of pixels today has caused the monitors to be prohibitively expensive.

The next solution is to use the diffusion grid. It is the technology that was employed by Samsung in the HMD Odyssey +.  This technology softens the light emitted by each pixel. This move, in turn, closes the light emitted by spaces between the pixels.