Introduction
Virtual reality head-mounted display equipment, referred to as VR head-mounted display VR glasses, is a product that uses simulation technology and computer graphics man-machine interface technology multimedia technology sensor technology network technology and other technologies. It is created with the help of computers and the latest sensor technology. A brand-new means of human-computer interaction. VR headsets and VR glasses are a cross-generational product. Not only let every enthusiast experience it with surprise and joy, but also deeply fascinated by the unknown of its birth and prospects.
The use of VR glasses
There are many cheaper VR glasses on the market that need the help of a mobile phone. Put a 4.7-6.0-inch mobile phone into the VR glasses, and download the corresponding APP in the mobile phone (depending on different brands, there are independent mobile phone software. ) can be used. Since the mobile phone is placed in the glasses, the user will not be able to operate the mobile phone, so the head control method is used or a Bluetooth handle is used for operation. There are also more expensive VR all-in-one machines on the market that are more convenient to use. But most of them are still in the developer version and not mature enough.
Introduction to the principle of VR glasses
The principle of VR glasses is similar to our eyes. The two lenses are equivalent to eyes, but they are far less "intelligent" than human eyes. In addition, VR glasses generally split the content screen, cut it in half, and realize superimposed imaging through the lens. At this time, the center of the pupil of the human eye, the center of the lens, and the center of the screen (after splitting the screen) are often not in a straight line, which makes the visual effect very poor, and there are a lot of problems such as unclearness and deformation.
Ideally, the center of the pupil of the human eye, the center of the lens, and the center of the screen (after splitting the screen) should be on a straight line. At this time, it is necessary to adjust the "pupillary distance" of the lens to coincide with the interpupillary distance of the human eye, and then use The software adjusts the center of the picture to ensure 3 points and one line, so as to obtain the best visual effect. Some domestic devices are adjusted physically, and some are adjusted by software, such as Baofeng Magic Mirror, whose interpupillary distance needs to be adjusted by the knob on the top, and SVR Glass requires software to adjust the interpupillary distance.
The AR adapter has three Type-C interfaces, which are respectively connected to the adapter, the projection device and the AR head display. In the past, the AR adapter basically used two PD chips to complete the control of the three Type-C interfaces. The LDR6020 launched by Ledry Technology has 3 channels and 6 channels of CC, which can control three Type-C interfaces at the same time with one PD chip, which not only saves costs, but also communicates more stably than using two PD chips!
As a USB PD3.1 SOC control chip, LDR6020 is specially designed for the application scenarios of multiple Type-C interfaces. It can support up to 6 Type-C interface devices to communicate at the same time, such as AR adapter, one-to-many fast charging lines, multi-port power banks, etc.
Figure 4 LDR6020 chip specification
LDR6020 adopts QFN-32 4*4 package, has 13 ADCs, 28-bit bidirectional I/O ports, 1-bit input port, 2-channel PWM, can do customized function design, and supports CC, UART, I2C, USB2.0 The firmware can be upgraded online in four modes, and the embedded cloud IDE development system will be opened in the future.
Summarize
Adhering to the concept that innovation is the primary productive force, Ledry Technology has been committed to the design and development of USB-C interface control chips. After years of accumulation of technology, LDR6020 has been launched with sincerity this time, which has given us many surprises. I believe In the future, Ledry Technology will pay more attention to the technology research and development of high-precision integrated circuits, and provide core chips for the innovation of Chinese enterprises.