VR goggles or VR headsets use head-mounted display devices that shield people's vision and hearing from outside world and help users feel like they are in a virtual environment. The display principle is that left and right eye screens display images of left and right eyes respectively, and human eyes will generate a three-dimensional sensation in brain after receiving this information with differences.
The basic configuration of conventional VR goggles is two convex lenses. Because there is only one screen, images seen by left and right eyes must be separated independently in order to have stereoscopic vision. 3D stereoscopic glasses can simulate real situation, so that images of left and right eyes are continuously and alternately displayed on screen, combined with physiological characteristics of human eye's constancy of vision, you can see what we call stereoscopic 3D images. .
To put it simply, lens in a VR helmet is based on different fields of view and creates a different perception of depth of image in local spaces, forming field of view of virtual reality in visual system of user's brain. The main limiting factor in field of view in virtual reality is lens, not pupil. To achieve a wider field of view, distance between user's eyeball and lens must be reduced, or lens size must be increased.
After releasing a series of excellent products over past two years, augmented reality glasses have improved both in terms of technology and experience. The threshold has been reached.
Players who are new to VR goggles should only have one word in their minds: shock, this feeling of reality and immersion can only be compared to Disney round curtain effect.
Watching movies with VR glasses will have a giant screen effect, especially watching sci-fi movies and thrillers will be more immersive than in a 3Dmax cinema. Change.
II. Basic structure and classification of virtual reality glasses 2.1 Basic structure of virtual reality glassesAccording to different usage scenarios, it will also be equipped with some auxiliary peripherals, such as: positioning base station, interactive pen, etc., to improve gaming experience.
2.2 Classification of virtual reality glassesDepending on infrastructure, virtual reality glasses are divided into three categories: mobile phone boxes, multifunctional devices and head-mounted displays (PC VR).
2.2.1 VR boxActually, it is a lens, and then a mobile phone is embedded in it to achieve a "VR perspective" when watching movies. The experience of this method is unsatisfactory, and now it is mostly eliminated, using VR as a small toy is also good, of course, but I personally do not recommend buying it.
2.2.2 All-in-One Virtual Machine
The model with its own processor, display, gyroscope and computing module, all-in-one, can meet user's needs for viewing and gaming completely wirelessly without any external equipment.
Despite being developed in last two years, all-in-one device has grown very quickly and has taken over majority of consumer VR goggle market. I believe that this will also be main direction for development of industry. in future.
2.2.3 PC-VR
The head-mounted virtual reality display belongs to category of high-end virtual reality glasses. It connects to a PC host to use a more powerful processor and graphics card to perform calculations to achieve best display effect.
PC VR glasses must be used with high performance computers. First, high-end players and some players with professional needs are chosen, and price is relatively very high.
3. Choosing options for beginners 1. ResolutionScreen resolution, which we usually talk about, refers to number of vertical and horizontal pixels, and unit is a pixel, for example: 1600 x 1200, which is what human eye sees at a certain distance.
But for VR goggles, 4K display at 3840*2160 resolution is close to eyes, so actual resolution that one eye sees is effect of 2K 1920*2160. Therefore, when buying, you must clearly see whether resolution is for one eye or for two eyes.
In fact, PDD (Pixel Per Degree) should be used to measure sharpness seen by human eye, which is number of pixels per degree of field of view. Simply put, larger PX/FOV value, better retinal resolution, typically reaching 60PDD.
2. Field of view
Field of view (FOV) here refers to range in which human eye can see left and right when wearing VR glasses. The range of angles that human eye can see is 220 degrees, while FOV of common VR glasses on market is about 100 degrees.
The larger field of view, better immersion in viewing process.
3. Refresh rate
Refresh rate is number of screen updates per second. The higher refresh rate, more stable displayed image.
However, a good game fluidity is determined by frame rate (frame rate is speed at which image on screen changes depending on video card) and refresh rate, so high-quality virtual reality glasses work together. with a computer.
Apart from subjective factors on a VR all-in-one, refresh rate basically determines whether you get dizzy or not.
4. Weight
The weight of VR goggles is often easy to overlook, but from experience of several products I've used, weight is very important to wearing comfort.
Heavier items will weigh down your whole head when wearing, and your head will be more tired after a long time, but more professional equipment, heavier weight (for example, vivo pro I bought is 754g, play Tired after a long time) .
5. Content ecology
Virtual reality glasses are mainly used for playing games and watching movies. Even if performance of equipment without environmental content is outstanding, it is useless. It should not be used as decoration.
To play games, you need to enjoy games, there are a lot of VR games on Oculus or Steam platform on computer, and there are a little less games from domestic manufacturers.
Watching movies requires a lot of movie resources, and iQiyi is best home content ecology.