How to overcome the heat dissipation problem of folding screen smartphones by bend-resistant graphite sheets

How to overcome the heat dissipation problem of folding screen smartphones by bend-resistant graphite sheets

In the first half of 2022, the Chinese smartphone market sold around 140 million units, 14.4 per cent year-on-year decline. Against the backdrop of declining sales in the smartphone market, folding screen phones are the opposite, with demand for some products outstripping supply.

However, in order to be thin and light, the space inside the folding screen phone is extremely small. The heat is easily concentrated in a single heat generator, which has an impact on CPU efficiency and OLED screen life.

At present, folding screen smartphones will face two major heat dissipation challenges.

1.The changeable folding screen form, which will change in thermal capacity when folded and unfolded.

2. The internal distribution of components is not balanced, and the thermal environment on the mainboard and SoC side will be worse.

Due to the design of the folding screen, the part where the pivot is located is where conventional cooling materials cannot be applied. Therefore, the cooling system will be divided into two parts, left and right part, making it a parallel-connected cooling system.

The second problem is that the internal components on the left and right side are not evenly divided, and the mainboard and SoC side will face more heat dissipation pressure.

In terms of a basic cooling system, some mobile phone manufacturers already have the VC liquid cooling solution + thermally conductive gel + multiple layers of graphite sheets + high grade bend-resistant graphite sheets. In this system, the bend-resistant graphite material creates a heat tunnel through both sides. As the graphite sheets have a high bending capacity to respond to the unfolding or folding application at any time.

DSN was established in 2011 which is mainly engaged in the research and development, production and sales of thermally conductive graphite sheets.

DSN has a complete line of synthetic graphite sheet. Our general performance, high performance, bend-resistant and UTS overlay graphite sheets can effectively solve the heat dissipation problem of folding phones. At present, DSN has supported many clients and abroad to solve the heat dissipation problems on the mid-frame and screen.

For folding OLED screens, can use the DSN single-layer bend-resistant graphite sheets .

For CPUs, can use the DSN laminated high-performance graphite sheets .

For mid-frames, can use the DSN single-layer graphite sheets .

For wireless charging, can use the DSN single-layer graphite sheets .

As a strategic partner of Samsung, DSN high thermal conductivity and bending resistance graphite sheets have been used by Samsung for many years, including the Galaxy Fold and Flip folding screen smartphones.

Thermally conductive graphite sheets have very good properties and can be combined with a variety of materials to dissipate heat, such as metal, adhesive, plastic and other materials. It also has low thermal resistance, light weight and high thermal conductivity.

In the 5G era, thermally conductive graphite sheets are well developed to meet the growing demand in the field of industrial heat dissipation through thermal management solutions, and also provide new solutions for thermal management in the electronics industry. As technology continues to innovate, thermally conductive graphite sheets will develop more and more excellent thermal conductivity and develop a wider range of applications.