industry news
Subscribe Now

OPPO Find X5 Pro elevates its cooling system to another level, offering an outstanding experience to users

SHENZHEN, CHINA – Media OutReach – 28 March 2022 – OPPO Find X5 Pro’s new cooling system allows the device to keep a cool head in any situation. The back panel won’t heat up uncomfortably when playing a rich 3D game, and there won’t be concerns about overheating when recording 4K video. A great cooling system unlocks the full potential of a powerful phone.

PC-grade cooling in a miniature shell

Perfecting cooling in a phone is not a simple process. The OPPO Find X5 Pro uses a full passive cooling solution, generating zero noise. And all its pieces have to slot in around the core components in a precision-crafted case less than 9mm thick.

The OPPO Find X5 Pro cooling system is not treated as a pure logistical block puzzle. Each step of the process is guided by the human body’s perception of temperature. There will be no hot spot on the phone’s back that the users can notice, no heat build-up to distract from whatever situations

OPPO vapor chamber design

A vapor chamber is the heart of the phone’s cooling system. From the outside, this may simply look like a thin sheet of metal, but there’s an intricate little world inside its walls.

The vapor chamber is an ultra-thin copper cave injected with a very small amount of liquid. As heat from the components underneath conducts through the chamber’s bottom, this liquid evaporates and spreads throughout the chamber. It condenses on the outer walls, spreading the heat it held over a much larger surface area, dissipating the heat in the process.

The larger a vapor chamber is, the wider and more effectively it can move heat away from the components that generate it, like the primary processor. OPPO has managed to increase its size by 75% over the previous generation. It almost completely covers the battery and SoC, the main processor.

The display driver and display panel, the SoC and wireless charging coil are some of the heat-generating areas that require extra attention. OPPO developed bespoke solutions for these components based around three materials: copper, graphite and graphene.

Advanced materials engineering

Copper is the traditional material for cooling components. However, when devising heat management for the display, OPPO’s R&D team found that both heat dispersal and the resilience of the screen can be improved by using a copper sheet sandwiched with an ultra-thin layer of graphite.

It helps to keep the display cool while it delivers searing brightness at 120Hz, and dramatically improves the drop resilience of the OPPO Find X5 Pro by increasing structural integrity.

The other hot zones in a phone, like the motherboard and battery coil, did not need the same level of structural support, letting OPPO R&D dig even further into possible solutions. They landed on a graphene film, where the carbon from graphite is arranged in a single-atom layer, which dramatically improves strength and conductivity.

Graphene is a wonderful material but producing it on a mass scale is no easy task. To turn graphite into graphene involves a process called sintering, where the graphite is heated at temperatures up to 3100 degrees centigrade. Such high temperatures were unattainable for mass industrial production. OPPO is the first in the industry to achieve it, resulting in the highest quality, most conductive graphene film.

Following years of experimentation and fine-tuning, OPPO has achieved a 50% improvement in thermal conductivity of the graphene film compared to its first-generation process, for industry-leading performance.

The compromise-free cooling system lowers the OPPO Find X5 Pro heat to a comfortable range, even when running a 90/120 Hz high refresh game and keeps the phone cool while charging.
More than passive cooling

OPPO also created the new Ice-skin* case to keep the phone cool while protecting it. The core of the case is Glacier Mat, an innovative material that achieves a self-replenishing cooling cycle without using any power at all.

Glacier Mat is a hydrogel layer co-developed with Wuhan University, one of the top universities in China. Hydrogel pulls moisture from the air, which is then evaporated through the heat generated by the device. It is an ideal material to bring the heat out from the device. However, the ordinary hydrogel cannot replenish water after evaporation so it can’t be used as a long-term cooling solution.

Glacier Mat is different, it is a modified hydrogel that can re-absorb moisture from the air at low temperatures, after the water initially held is evaporated through the process of cooling the OPPO Find X5 Pro, creating a circular cooling cycle. Although it sounds simple, it cost OPPO’s engineers a great deal of effort to put this theory into practice and mass production in less than half a year.

Testing shows a 2-3 degree drop in phone temperature when gaming with the Ice-skin case attached. A cooler phone improves comfort during play and ensures the highest frame rates for smoother experience. The most important part: the Ice-skin case achieves all this with minimal weight, zero power use and zero noise.

Leave a Reply

featured blogs
May 20, 2022
This year's NASA Turbulence Modeling Symposium is being held in honor of Philippe Spalart and his contributions to the turbulence modeling field. The symposium will bring together both academic and... ...
May 19, 2022
Learn about the AI chip design breakthroughs and case studies discussed at SNUG Silicon Valley 2022, including autonomous PPA optimization using The post Key Highlights from SNUG 2022: AI Is Fast Forwarding Chip Design appeared first on From Silicon To Software....
May 12, 2022
By Shelly Stalnaker Every year, the editors of Elektronik in Germany compile a list of the most interesting and innovative… ...
Apr 29, 2022
What do you do if someone starts waving furiously at you, seemingly delighted to see you, but you fear they are being overenthusiastic?...

featured video

Synopsys PPA(V) Voltage Optimization

Sponsored by Synopsys

Performance-per-watt has emerged as one of the highest priorities in design quality, leading to a shift in technology focus and design power optimization methodologies. Variable operating voltage possess high potential in optimizing performance-per-watt results but requires a signoff accurate and efficient methodology to explore. Synopsys Fusion Design Platform™, uniquely built on a singular RTL-to-GDSII data model, delivers a full-flow voltage optimization and closure methodology to achieve the best performance-per-watt results for the most demanding semiconductor segments.

Learn More

featured paper

Introducing new dynamic features for exterior automotive lights with DLP® technology

Sponsored by Texas Instruments

Exterior lighting, primarily used to illuminate ground areas near the vehicle door, can now be transformed into a projection system used for both vehicle communication and unique styling features. A small lighting module that utilizes automotive-grade digital micromirror devices, such as the DLP2021-Q1 or DLP3021-Q1, can display an endless number of patterns in any color imaginable as well as communicate warnings and alerts to drivers and other vehicles.

Click to read more

featured chalk talk

Enabling the Flow of Data in the World of IoT

Sponsored by Mouser Electronics and YAGEO Group

At the heart of our growing IoT ecosystem are high performance semiconductors, but integrated circuits alone cannot make a successful IoT system. In this episode of Chalk Talk, Amelia Dalton chats with Peter Blais from KEMET and Ryan Wenzelman from Pulse about how passive components are crucial to the development of successful IoT frameworks. They take a closer look at RF, wired and power distribution aspects of IoT system development and investigate how YAGEO Group is advancing innovation in the world of IoT with a wide selection of passive components.

Click here for more information about Pulse Electronics World of IoT