Foldable mobile phone graphene heat dissipation structure and heat dissipation method

Abstract

The present invention provides a foldable mobile phone graphene heat dissipation structure. Reliable heat dissipation of a mobile phone is implemented by means of the lightness, thinness, high heat dissipation, and high heat conduction characteristics of graphene, and the stability and reliability of the graphene structure are ensured. The heat dissipation structure comprises: a graphene layer, comprising at least one layer of graphene; two transparent double-sided adhesive tapes, i.e., an upper transparent double-sided adhesive tape and a lower transparent double-sided adhesive tape; stainless steel supporting steel sheet; and a black PET original film; the upper transparent double-sided adhesive tape is adhered to the upper surface of the graphene layer; the lower transparent double-sided adhesive tape is adhered to the lower surface of the graphene layer; the upper transparent double-sided adhesive tape is laminated to the stainless steel supporting steel sheet; the lower transparent double-sided adhesive tape is laminated to the black PET original film; the lower transparent double-sided adhesive tape is provided with an adhesive break area at a bending position corresponding to a mobile phone screen; and the lower transparent double-sided adhesive tape is separated by the adhesive break area into two independent parts.

Description

Graphene heat dissipation structure of foldable mobile phones and corresponding heat dissipation method Technical Field

[0001] The present invention relates to the technical field of heat dissipation for foldable mobile phones, and in particular to a graphene heat dissipation structure for foldable mobile phones. The present invention also provides a graphene heat dissipation method for foldable mobile phones. Background Art

[0002] Before smartphones, the power consumption of mobile phone chips was not high, so people usually did not pay too much attention to temperature control design during the design process. In the era of smartphones, chip performance has improved, and coupled with the high power consumption of mobile phone SOC information processing and data calculation, screens, cameras, fast charging, and some APP application information, the heat dissipation issue has become a concern. Common heat dissipation solutions include copper foil thermal conductivity, liquid cooling, graphite sheet thermal conductivity, or external air cooling of some gaming phones. Mobile phones are constantly developing towards intelligence, diversification, and high-end. In order to cope with fierce competition, leading manufacturers have entered the folding screen track.

[0003] As part of the efficient heat dissipation components inside mobile phones, graphene is widely used in the heat dissipation field due to its light weight, high heat dissipation and high thermal conductivity.

[0004] Graphene with conventional structure and its heat dissipation are only suitable for ordinary smartphones. When introduced into folding phones, the disconnected design will cause uneven heat dissipation of the folding phone. The one-piece design will cause wrinkles and arches at the folding position due to the fragile and wrinkle-prone nature of graphene itself, squeezing the precision components inside the phone, affecting the phone's service life and heat dissipation effect.

[0005] Different from the internal heat dissipation design of conventional mobile phones, graphene is fragile and easy to wrinkle. How to ensure uniform heat dissipation when introduced into folding mobile phones while not affecting the performance and service life of the mobile phone due to the repeated bending and wrinkling of graphene? Given the limited internal space of the mobile phone, how to solve the problem of graphene wrinkles caused by screen folding squeezing the internal components of the mobile phone has become an urgent problem to be solved.

[0006] Summary of the Invention

[0007] In response to the above problems, the present invention provides a graphene heat dissipation structure for foldable mobile phones, which reliably dissipates heat from the mobile phone through the lightness, high heat dissipation and high thermal conductivity properties of graphene, and ensures the stability and reliability of the graphene structure.

[0008] A graphene heat dissipation structure for a foldable mobile phone, characterized in that it comprises:

[0009] a graphene layer comprising at least one layer of graphene;

[0010] Two transparent double-sided tapes, specifically an upper transparent double-sided tape and a lower transparent double-sided tape;

[0011] Stainless steel support steel sheet;

[0012] And black PET original film;

[0013] The upper surface of the graphene layer is adhered with an upper transparent double-sided tape, and the lower surface is adhered with a lower transparent double-sided tape. The upper transparent double-sided tape is laminated and connected to the stainless steel support steel sheet, and the lower transparent double-sided tape is laminated and connected to the black PET original film.

[0014] A glue-breaking area is provided at the bending position of the lower transparent double-sided adhesive tape corresponding to the mobile phone screen, and the glue-breaking area separates the lower transparent double-sided adhesive tape into two independent parts.

[0015] It is further characterized by:

[0016] It also includes a lubricating layer, and the upper surface of the stainless steel supporting steel sheet, corresponding to the bending position of the mobile phone screen, is coated with a lubricating layer;

[0017] The material of the lubricating layer is specifically quick-drying oil or grease;

[0018] Before the product leaves the factory, a release film layer is applied to both surfaces of the whole product to protect the product;

[0019] The graphene layer adopts a scheme of stacking one or more layers of graphene to fill the internal mobile phone space and evenly dissipate heat and conduct heat;

[0020] The overall surface areas formed by the two corresponding layers of transparent double-sided adhesive completely cover the corresponding surfaces of the graphene layer;

[0021] The length of the adhesive cut-off area is 5-8 mm, and its width is the width of the lower transparent double-sided adhesive tape;

[0022] The upper transparent double-sided tape and the lower transparent double-sided tape are both 5 μm thick transparent double-sided tapes.

[0023] A graphene heat dissipation method for foldable mobile phones is characterized in that: it is suitable for mobile phone screens with inward bends, the lower double-sided adhesive layer is cut off corresponding to the bend position of the mobile phone screen, so that the lower double-sided adhesive layer is separated into two parts, the upper surface of the graphene layer is laminated with a stainless steel support steel sheet through the upper transparent double-sided adhesive, and the lower surface of the graphene layer is laminated with a black PET original film through the lower transparent double-sided adhesive.

[0024] It is further characterized by:

[0025] Teflon is compounded on both surfaces of the graphene layer. Teflon has the advantage of a low friction coefficient, which can effectively reduce the friction on the internal components of the mobile phone when bending;

[0026] A lubricating layer is applied to the outer surface of the stainless steel support sheet at a location corresponding to the bend of the mobile phone screen. The lubricating layer is made of quick-drying oil or grease.

[0027] In addition to the bending position of the mobile phone screen, the positions of the glue-breaking areas are also dispersed and spaced at different positions of the lower double-sided tape. When dispersed at the bending position other than the mobile phone screen, the glue-breaking length is not greater than the glue-breaking length corresponding to the bending position of the mobile phone screen.

[0028] After adopting the above technical solution, when the mobile phone is bent and subjected to stress, the bending area is squeezed inward, and affected by the stress of the material itself, the stress within the material is directed outward. After flattening, since there is a local gap without glue in the transparent double-sided tape below, the bending extrusion force and the internal stress of the material itself will be released at this position, which can effectively reduce the problem of graphene wrinkle stratification at this position; it reliably dissipates heat for the mobile phone through the lightness, high heat dissipation and high thermal conductivity characteristics of graphene, and ensures the stability and reliability of the graphene structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a perspective exploded structural diagram of a specific embodiment of the present invention;

[0030] FIG2 is a schematic diagram of bending force of the present invention;

[0031] FIG3 is a schematic diagram of the flattened force of the present invention;

[0032] FIG4 is a schematic diagram of bending force corresponding to another embodiment of the present invention;

[0033] The names corresponding to the serial numbers in the figure are as follows:

[0034] Upper release film layer 1, lubricating layer 2, stainless steel support sheet 3, upper transparent double-sided tape 4, graphene layer 5, lower transparent double-sided tape 6, adhesive cut-off area 61, black PET original film 7, lower release film layer 8. DETAILED DESCRIPTION

[0035] The graphene heat dissipation structure of a foldable mobile phone, as shown in Figure 1, includes a graphene layer 5, two transparent double-sided adhesive tapes, a stainless steel support sheet 3, a black PET original film 7, an upper release film layer 1, and a lower release film layer 8;

[0036] In a specific implementation, the graphene layer includes at least one layer of graphene; the two transparent double-sided tapes are specifically an upper transparent double-sided tape 4 and a lower transparent double-sided tape 6.

[0037] In the specific implementation, the upper transparent double-sided tape 4 and the lower transparent double-sided tape 6 are both 5 μm thick transparent double-sided tapes, and the thickness of the black PET original film 7 is 6 μm;

[0038] The upper surface of the graphene layer 5 is adhered with an upper transparent double-sided tape 4, and the lower surface is adhered with a lower transparent double-sided tape 6. The upper transparent double-sided tape 4 is laminated and connected to the stainless steel support steel sheet 3, and the lower transparent double-sided tape 6 is laminated and connected to the black PET original film 7. A breaking tape area 61 is provided at the bending position of the lower transparent double-sided tape 6 corresponding to the mobile phone screen. The breaking tape area 61 separates the lower transparent double-sided tape 6 into two independent parts.

[0039] In a specific implementation, it also includes a lubricating layer 2, which is applied to the upper surface of the stainless steel support steel sheet 3 at the bend position corresponding to the mobile phone screen. The lubricating layer 2 is specifically made of quick-drying oil or grease. The quick-drying oil is sprayed in an amount controlled by a pneumatic raft and a nozzle, while the grease is sprayed in an amount controlled by a pneumatic raft and a spray brush. The amount is determined by the surface friction coefficient. In addition, the spraying area is also determined by the shape of the nozzle and the number of reciprocating spray brushes.

[0040] Before the product leaves the factory, an upper release film layer 1 and a lower release film layer 8 are respectively attached to the two surfaces of the whole product to protect the product; in specific implementation, the release film can also be a release paper / easy-tear film;

[0041] The graphene layer 5 adopts a scheme of stacking one or more layers of graphene to fill the internal mobile phone space and evenly dissipate heat and conduct heat;

[0042] The overall surface areas formed by the upper transparent double-sided tape 4 and the lower transparent double-sided tape 6 completely cover the corresponding surfaces of the graphene layer 5;

[0043] The length of the adhesive cut-off area 61 is 5-8 mm, and its width is the width of the lower transparent double-sided adhesive tape 6 .

[0044] In specific implementation, in order to ensure the heat dissipation of the mobile phone, the materials of the upper and lower edges of the graphene are relatively thin, only 6-10μm. When die-cutting and punching, a 5-8mm blank and glue-free area is made in the bending stress area to release the stress of the graphene bending.

[0045] It has an integrated graphene design, and the foldable phone dissipates heat evenly on the left and right sides; while the glue is cut off in the bending area to release stress, quick-drying oil is applied to the steel sheet load-bearing position and graphene position in the folding area, which can effectively reduce the dynamic friction caused by the folding of the mobile phone. The current measured dynamic friction coefficient after oiling is 0.112 (test conditions: 200g load, wool felt); before the glue is cut off, the average wrinkle height of 65um graphene is 0.03mm (detection method: bending 10 times, Keyence 3D scanning protrusion height), after the glue is cut off, the 65um graphene has no wrinkles after flattening; a bending test has been done, which can meet 15-20W folding times and there are no obvious wrinkles when flattened.

[0046] Graphene heat dissipation method for foldable mobile phones: It is suitable for inward-bending mobile phone screens. The lower double-sided adhesive layer is cut off corresponding to the bending position of the mobile phone screen, so that the lower double-sided adhesive layer is separated into two parts. The upper surface of the graphene layer is laminated with the stainless steel support steel sheet through the upper transparent double-sided adhesive, and the lower surface of the graphene layer is laminated with the black PET original film through the lower transparent double-sided adhesive.

[0047] In a specific implementation, Teflon is compounded on both surfaces of the graphene layer. Teflon has the advantage of a low friction coefficient, which can effectively reduce the friction on the internal components of the mobile phone when bending;

[0048] A lubricating layer is applied to the outer surface of the stainless steel support sheet at a location corresponding to the bend of the mobile phone screen. The lubricating layer is made of quick-drying oil or grease.

[0049] In addition to the bending position of the mobile phone screen, the positions of the glue-breaking areas are also dispersed and spaced at different positions of the lower double-sided tape. When dispersed at the bending position other than the mobile phone screen, the glue-breaking length is not greater than the glue-breaking length corresponding to the bending position of the mobile phone screen.

[0050] Its working principle is as follows: when the mobile phone is bent and subjected to stress, the bending area is squeezed inward, and affected by the stress of the material itself, the stress within the material is directed outward. After flattening, due to the local gap without glue in the transparent double-sided tape below, the bending extrusion force and the internal stress of the material itself will be released at this position, which can effectively reduce the problem of graphene wrinkle stratification at this position; it reliably dissipates heat from the mobile phone through the lightness, high heat dissipation and high thermal conductivity characteristics of graphene, and ensures the stability and reliability of the graphene structure.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0052] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A graphene heat dissipation structure for a foldable mobile phone, characterized in that: It includes: a graphene layer comprising at least one layer of graphene; Two transparent double-sided tapes, specifically an upper transparent double-sided tape and a lower transparent double-sided tape; Stainless steel support steel sheet; And black PET original film; The upper surface of the graphene layer is attached with an upper transparent double-sided tape, and the lower surface is attached with a lower transparent double-sided tape. The upper transparent double-sided tape is laminated and connected to the stainless steel support steel sheet, and the lower transparent double-sided tape is laminated and connected to the black PET original film. A glue-breaking area is provided at the bending position of the lower transparent double-sided adhesive tape corresponding to the mobile phone screen, and the glue-breaking area separates the lower transparent double-sided adhesive tape into two independent parts.

2. The graphene heat dissipation structure for a foldable mobile phone according to claim 1, characterized in that: It also includes a lubricating layer. The upper surface of the stainless steel supporting steel sheet is covered with the lubricating layer at the bending position corresponding to the mobile phone screen.

3. The graphene heat dissipation structure for a foldable mobile phone as claimed in claim 2, characterized in that: The material of the lubricating layer is specifically quick-drying oil or lubricating grease.

4. The graphene heat dissipation structure for a foldable mobile phone as claimed in claim 3, characterized in that: Release film layers are respectively attached to the two surfaces of the overall product.

5. The graphene heat dissipation structure for a foldable mobile phone according to claim 1, characterized in that: The graphene layer adopts a scheme of stacking one or more layers of graphene to fill the internal mobile phone space and evenly dissipate heat and conduct heat.

6. The graphene heat dissipation structure for a foldable mobile phone according to claim 1, characterized in that: The overall surface areas formed by the two corresponding layers of transparent double-sided adhesive completely cover the corresponding surfaces of the graphene layer.

7. A graphene heat dissipation method for foldable mobile phones, characterized in that: It is suitable for inward-bending mobile phone screens. The lower double-sided adhesive layer is cut off corresponding to the bending position of the mobile phone screen, so that the lower double-sided adhesive layer is divided into two parts. The upper surface of the graphene layer is laminated with the stainless steel supporting steel sheet through the upper transparent double-sided adhesive, and the lower surface of the graphene layer is laminated with the black PET original film through the lower transparent double-sided adhesive.

8. The graphene heat dissipation method for a foldable mobile phone as claimed in claim 7, characterized in that: Teflon is compounded on both surfaces of the graphene layer. Teflon has the advantage of a low friction coefficient and can effectively reduce the friction on the internal components of the mobile phone when bending.

9. The graphene heat dissipation method for a foldable mobile phone according to claim 7 or 8, characterized in that: A lubricating layer is coated on the outer surface of the stainless steel supporting steel sheet at a position corresponding to the bending position of the mobile phone screen, and the material of the lubricating layer is specifically quick-drying oil or grease.

10. The graphene heat dissipation method for a foldable mobile phone as claimed in claim 9, characterized in that: The locations of the glue-breaking areas are dispersed and spaced at different positions of the lower double-sided tape in addition to the bending position of the mobile phone screen. When dispersed at the bending position other than the mobile phone screen, the glue-breaking length is not greater than the glue-breaking length corresponding to the bending position of the mobile phone screen.

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