After wearing a VR head for a while, you may notice that the eyes begin to experience fatigue, and the cause is related to the lesser-known neurological phenomenon of the vergence-accommodation conflict. In short, the distance between the eye and the object does not match the focus. Most VR glasses require you to stare at a screen that is only a few centimeters away from your eyes, but focus on a farther point. This task confuses the brain because the brain is used to being in the same place. But now optical engineers have developed a new type of 3D display, and they claim that this breakthrough will solve the problem of visual convergence adjustment conflicts. Liang Gao of the University of Illinois said: "We hope to replace the current optical display models for AR and VR with our 3D display to solve eye fatigue problems. Our approach can be integrated into any AR glasses or VR heads. A new generation of 3D display." Their new display module is only 1 x 2 inches, but the depth cues it produces allow the brain to perceive in the same way as real life. This is mainly achieved by dividing the digital display into sub-panels that can create 2D images. Such sub-panel images can be moved to different depths, but the centers are all aligned with each other. As a result, users seem to be able to see images of different depths. In addition, the researchers used a special algorithm to blend the edges together so that the depth information looks like continuous and uninterrupted, and integrates a single 3D image. Gao said: "Someone tried the same way to create multi-panel depths, but instead of creating multiple depth images at the same time, they quickly changed the image. However, this method requires trade-offs in dynamic range or contrast. Because the duration of each image display is very short." The researchers' next step is to reduce the size, weight and power consumption of the system, making it more practical for the user to wear. In addition, the team is looking for partners to commercialize the technology. It is understood that the complete information of the system has been published in the "Optics Letters" journal.
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