In recent years, VR has occupied a large share of the market, attracting many manufacturers and entrepreneurs. Now that VR technology is beginning to settle, in a downturn, ar technology has begun to rise.
Mentioning the hot VR in the past two years, people who haven’t experienced it may think of flying freely in the virtual world; those who have actually experienced it will understand how much it feels to wear a heavy, cable-connected helmet. Bored and uncomfortable. Since its inception in the 1950s, VR heads have seen little improvement in appearance in terms of hardware in addition to increased screen resolution. As for when we can make glasses-sized VR/AR devices, the chief scientist of Oculus Rift even pushed the date directly to 10 years later.
However, the new product of Canadian company AdHawk Microsystems may significantly shorten this development cycle. Recently, AdHawk exposed the motion tracking sensor made of MEMS chip, and this miniature sensor can be used for eye tracking, but it is far less than the current infrared camera solution in terms of power consumption and volume. The eye tracking technology is the basis of the "viewpoint rendering" technology, which can greatly improve the speed and efficiency of VR/AR content rendering, reduce the hardware requirements of this process, and make it possible to miniaturize VR and AR devices.
Track eyeballs with smaller chipsIn the field of eye tracking, the most mainstream solution at present is to capture the user's eye movements with an infrared camera. Since the size of the infrared camera is difficult to make small, the related eye tracking kit is often made into a lens with a thicker border (Seven Xin Yi Wei), or nested in front of the notebook (Tobii). Due to the high power consumption of the camera, this also means that the embedded device must have a large power supply, and often the device must be wired.
According to AdHawk, the chips produced by the company using microelectromechanical technology (MEMS) are very small, and the miniature sensors made by these chips can be made to resemble a grain of sand and have a very small size. In terms of working principle, these miniature sensors can scan the user's eye with a low-energy light, which is 10 times faster than traditional infrared cameras. The sensor measures the reflected light and thus outputs scientifically-accurate eye coordinates. Thanks to MEMS technology, the power consumption of this miniature sensor is very low, and the power of a button battery is enough to support the sensor for a whole day.
Through the official introduction of AdHawk, you can understand that the company believes that the important application direction of this sensor is VR and AR equipment. In addition to low power consumption and small size, AdHawk's eye tracking technology has a more important role for VR/AR, which is to achieve "Foveated Rendering", which may be VR and AR. The key to technology diffusion.
Viewpoint rendering makes VR display more labor-savingAt present, a pain point in the VR industry is the rendering of the picture. Regardless of whether it is a mobile phone or a computer, its processor only needs to render one picture, and VR needs to render two pictures. At the same time, in order to avoid dizziness, VR's picture refresh rate needs to be kept at 90 frames/second, which makes VR content rendering more traditional. The content needs to be several times more work, which is why the VR head display needs to be relatively high in the configuration of the corresponding PC.
However, scholars have found that when humans look at a picture, the pictures they see are not all the same, the resolution around the eye point of view is the highest, and the surrounding is greatly reduced. The same principle, if the VR picture only needs to render the resolution of the user's line of sight focus to the highest, and the surrounding picture resolution is lower, it will greatly reduce the workload of the processor, making the threshold of VR rendering easier.
AdHawk's miniature sensors are as reliable as propaganda, which will undoubtedly promote the rapid maturity of eye tracking technology, which is also the key to viewpoint rendering technology. And when viewpoint rendering is possible, the display of VR and AR devices will be easier, and even small, low-power processors (GPUs or CPUs) can do all the functions, so VR and AR devices can be smaller.
Two weeks ago, Facebook just launched the VR all-in-one Oculus Go. Coincidentally, Google also joined forces with HTC and Lenovo to launch the VR all-in-one. It is foreseeable that the VR all-in-one will definitely replace the head-mounted device that connects the PC with a cable in the future. For independent devices to provide high-quality performance, it is very important to be similar to AdHawk's micro-sensors, because these MEMS chips are very likely to make these currently cumbersome devices into ordinary glasses in the future, let VR and AR The device is truly popular in the mass market.
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