Xiaomi held a millet conference in Beijing. In addition to the release of Xiaomi Note2 mobile phone, the conference also released the official version of Xiaomi VR glasses. Xiaomi VR glasses official version is priced at 199 yuan and opened beta on November 8.
Lei Jun said at the press conference that in August this year, the Xiaomi VR glasses toy version was released, and 400,000 units have been sold. Now, the official version of this millet VR glasses will be released soon.
In terms of system, the official version of Xiaomi VR glasses uses a special MIUI VR system, which includes 500+ panoramic video and 30+VR applications. And this platform now has 200+ developers sign up for participation. In terms of configuration, the official version of Xiaomi VR glasses has built-in independent motion sensor and 16ms low latency. In terms of workmanship, the official version of Xiaomi VR glasses uses soft island velvet, skin-friendly and fine coverage, and integrated head-mounted design to spread pressure. In addition, the official version of Xiaomi VR glasses also has a distance adjustment wheel, which supports 600 degrees of myopia and 200 degrees of hyperopia. In terms of somatosensory, the official version of the Xiaomi VR glasses is equipped with a high-precision 9-axis sensor that can be used to enhance the immersion of the experience.
The official version of this millet VR glasses is priced at 199 yuan, currently supports Xiaomi Note2, Xiaomi 5, Xiaomi 5S and Xiaomi 5S Plus four mobile phones. It is worth mentioning that compared to Huawei, Samsung and other mobile phones and other manufacturers to support the DayDream platform, the official version of Xiaomi VR glasses uses Xiaomi's original MIUI VR platform.
Usually,10 & 20 layers PCB are HDI board,but some are not .Some with big trace width and space,holes are over 0.3mm too. We have much experience in doing 10 layer PCB & 20 layer PCB.
A ten-layer board should be used when six routing layers are required. Ten-layer boards, therefore, usually have six signal layers and four planes. Having more than six signal layers on a ten-layer board is not recommended. Ten-layers is also the largest number of layers that can usually be conveniently fabricated in a 0.062" thick board. Occasionally you will see a twelve-layer board fabricated as a 0.062" thick board, but the number of fabricators capable of producing it are limited..
High layer count boards (ten +) require thin dielectrics (typically 0.006" or less on a 0.062" thick board) and therefore they automatically have tight coupling between layers. When properly stacked and routed they can meet all of our objectives and will have excellent EMC performance and signal integrity.
A very common and nearly ideal stack-up for a ten-layer board is shown in Figure 12. The reason that this stack-up has such good performance is the tight coupling of the signal and return planes, the shielding of the high-speed signal layers, the existence of multiple ground planes, as well as a tightly coupled power/ground plane pair in the center of the board. High-speed signals normally would be routed on the signal layers buried between planes (layers 3-4 and 7-8 in this case).
10 layer PCB 10 layer TG170 PCB 10 layer design
Storm Circuit Technology Ltd , https://www.stormpcb.com