Exploring Black Technology-How does VR glasses conduct heat?

Virtual Reality (VR) glasses, or VR headsets, are a new means of human-computer interaction created with the help of computers and the latest sensor technology. VR glasses is a cross-generation product that provides users with an immersive experience in a virtual environment. As panoramic content, content can be raised to a level, and VR will collaborate across fields to promote the development of other industries, such as games, social media, education and many other industries have produced qualitative changes.

With the development of VR technology, devices that were originally only concept products have now brought virtual experiences and fun to many gamers.
Take VR glasses from a well-known manufacturer as an example, let's explore its true colors together

As somatosensory devices, there are of course accelerometers, gyroscopes, and laser positioning sensors. For 360 ° device tracking, it also has a dedicated Lighthouse infrared receiver.
It has 32 sensors in common. These photodiodes absorb infrared light from the Lighthouse base station, and blink and sweep constantly, allowing the PC to calculate the precise position and orientation of the headset in the room.

Each small blue dot is an infrared filter. These filters provide photoelectric diodes with a window into which Lighthouse base stations can exchange information.

The main board that everyone cares about is full of important components:

Red—— STMicroelectronics 32F072R8 ARM Cortex-M0 microcontroller
Orange—— Toshiba TC358870XBG 4K HDMI to MIPI Dual DSI Converter
Yellow—— SMSC USB5537B Seven-port USB central controller
Green —— Kunpeng Technology AIT8328 system-on-chip (with image signal processor)
Light blue—— Xunxun CM108B USB audio decoder
Blue—— Magnesium M25P40 Serial Flash Memory (4Mb)
Purple —— Magnesium N25Q032A13ESE40E Serial Flash Memory (32Mb)

So many important components are densely distributed on the motherboard. How can the heat generated during operation be conducted and evacuated? Which high thermal conductive materials are suitable for VR glasses?

【Solution1】

◆ WT5902 series thermal pad
Recommended models:
WT5902-D40-40; WT5902-D45-40
Thermal conductivity range:
4W, 5W, 6W, 7W, 8W

WT5902 series thermal pads can solve the problem of product structure design tolerance changes, and can be reused. It is a good vertical heat transfer material between the heat source (CPU or electronic chipset) and the heat sink. Has good insulation and mechanical properties, can tightly integrate irregular or complex surfaces, easy to use and easy to remove. It is widely used in power supply equipment, automotive electronics, communication equipment, network terminals, storage devices, consumer electronics and other fields.

【Solution2】

◆ WT5921 series thermal gel
Recommended models:
WT5921-30; WT5921-35
Thermal conductivity range:
3W, 3.5W

Thermal gel is generally packaged with a syringe. This material itself does not contain solvents. It has the characteristics of high thermal conductivity, low compression force, high compression ratio, good electrical insulation properties, and good temperature resistance. Good weather resistance, high and low temperature resistance, good insulation properties, etc. At the same time, it has strong plasticity, can meet the filling of uneven interfaces, and meet the heat transfer requirements of various applications. It is currently the most advanced thermally conductive material.

Waermtimo WT5921 series thermal gel is a silicon resin as the base material, added with a certain proportion of thermal conductive fillers configured, and processed through a special process of mud, also known in the industry as thermal conductive clay. It has excellent high and low temperature resistance, excellent weather resistance, radiation resistance and superior dielectric properties, and anti-aging properties, which can allow VR glasses to play excellent performance.

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