ELECTRONIC DEVICE WITH DUAL FUNCTION OUTER SURFACE
An outer portion of an electronic device has an uneven profile to aid in the dissipation of heat. Raised points in the uneven profile may be manufactured with a non-thermal conductive coating. In one implementation, the outer portion of the device includes a thermally conductive layer having an uneven surface and at least one other surface that is thermally coupled with a heat source. The uneven surface includes high areas that are higher than other areas of the uneven surface. A number of non-thermally conductive second layer areas are located on the high areas of the thermally conductive surface.
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1. Technical Field of the Invention
Implementations described herein relate generally to electronic devices and, more particularly, to heat dissipating surfaces of electronic devices.
2. Description of Related Art
Electronic devices, such as mobile phones, media players, navigational devices, laptop computers, and hand held computers are becoming increasingly useful as technology shrinks the size and increases the computational power of such devices. All electronic devices require power to operate, some of which is given off as heat.
Heat sinks may be used in electronic devices to help dissipate heat into the ambient atmosphere. In certain situations, the electronic devices, and in particular, the surface of the heat sink surface, can become uncomfortably hot for the user.
SUMMARYAccording to one aspect, a device has an outer surface and includes a thermally conductive layer and second layer areas. The thermally conductive layer has an uneven surface and at least one other surface that is thermally coupled to a heat source. The uneven surface includes first areas that are higher than other areas of the uneven surface and further includes the second layer areas located on the first areas of the thermally conductive surface.
In another aspect, the second layer areas of the device may be non-thermally conductive areas.
In another aspect, the second layer areas of the device may include a plastic material or an elastomer. The thermally conductive layer may include a metal.
In another aspect, the thermally conductive layer may act as a heat sink for the device.
In another aspect, the uneven surface of the thermally conductive layer includes a wave like contour.
In another aspect, the uneven surface of the thermally conductive includes a hill like contour or a box like contour.
In another aspect, the second layer areas are formed of a material that is relatively easy to grip.
In another aspect, the first areas of the uneven surface are separated from the low areas of the uneven surface by approximately 0.2 millimeters to on the order of a few millimeters.
In yet another aspect, an electronic device includes a heat source and an outer surface portion. The outer surface portion includes a thermally conductive layer having an uneven surface and at least one other surface that is thermally coupled to the heat source. The uneven surface includes a plurality of raised areas. Further, the outer surface portion includes a number of second layer areas located on the raised areas of the thermally conductive surface.
In another aspect, the electronic device is a mobile terminal or a portable computer.
In another aspect, the second layer areas of the electronic device include non-thermally conductive areas.
In another aspect, the plurality of second layer areas of the electronic device each include a plastic material or an elastomer.
In another aspect, the thermally conductive layer includes a metal.
In another aspect, the uneven surface includes a wave like contour. The uneven surface may alternatively include a hill like contour or a box like contour.
In another aspect, the plurality of second layer areas may be formed of a material that is relatively easy to grip.
In yet another aspect, a dual function surface is provided that comprises means for dispersing heat, the means for dispersing heat having a thermally conductive uneven surface. The dual function surface further comprises means for insulating portions of the uneven surface with a material that is relatively non-thermally conductive.
In another aspect, the means for insulating portions of the uneven surface has a high coefficient of friction and a pleasant tactile feel.
In another aspect, the uneven surface has a wave contour.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, explain the invention. In the drawings,
The following detailed description of the invention refers to the accompanying drawings. The same reference numbers in different drawings may identify the same or similar elements. Also, the following detailed description does not limit the invention.
As described herein, an outer portion of an electronic device is given an uneven profile, such as a wavy profile, to aid in the dissipation of heat. The high points in the uneven profile, such as the peaks of the wavy profile, may be stamped or coated with a non-thermal conductive coating. The non-thermal conductive coating may be relatively pleasant to user touch. In this manner, the uneven profile portion of the electronic device functions to both dissipate heat while allowing the user to comfortably touch or hold the device.
Device 100 may include housing 110, speaker 120, display 130, control keys 140, keypad 150, and microphone 160. Housing 110 may protect the components of device 100 from outside elements. Housing 110 may be made from thermoplastics, metals, elastomers (e.g., synthetic rubber and/or natural rubber), and/or other similar materials. Speaker 120 may provide audible information to a user of device 100. Display 130 may provide visual information to the user. For example, display 130 may provide information regarding incoming or outgoing telephone calls, games, telephone numbers, the current time, e-mail, etc. Control keys 140 may permit the user to interact with device 100 to cause device 100 to perform one or more operations. Keypad 150 may include a standard telephone keypad and may include additional keys to enable typing information into device 100. Microphone 160 may receive audible information from the user.
At least one portion of housing 110 of device 100 may include an uneven surface portion, referred to as a dual function surface 115 herein. In this example, dual function surface 115 is implemented on the back side of device 100. Dual function surface 115 is designed to dissipate heat while having a surface that is pleasant for the user to touch. Dual function surface 115 may generally be implemented on any external surface of housing 110, and can be particularly useful when implemented on areas of housing 110 from which it is desirable to dissipate heat, such as over a battery charging area or over an area an covers core circuitry of device 100.
The top surface of layer 210 may be stamped or coated with non-thermal conductive areas 215. As shown, non-thermal conductive areas 215 may be located at or near the peaks of layer 210 (i.e., near peak portions 216). Non-thermal conductive areas 215 may, for example, be implemented as a plastic material (e.g., a thermoplastic) or as an elastomer (e.g., rubber). In general, the material may be selected as a material that is relatively non-thermally conductive and has a pleasing tactile feel and/or has a high coefficient of static or dynamic friction (i.e., it's “grippy”). The total area covered by the non-thermal conductive areas 215 may be less, and in some implementations, significantly less than the total area covered by dual function surface 115. Making layer 210 uneven serves to increase the available outer surface, for improved thermal exchange, and create a relief that allows for non-thermal conductive areas 215 to be simply added.
The amplitude of the waves of layer 210 may vary based on the design of the particular device, and may typically vary from the order of a few tenths of a millimeter to a few millimeters. For example, the amplitude, shown as distance “D” in
Dual function surface 115, as shown in
It can be appreciated that the “wavy” profile of the top surface of layer 210 is exemplary. Many other different profiles are possible and may be used to provide similar functionality. For example,
Layer 410 may be stamped or coated with non-thermal conductive areas 415. Non-thermal conductive areas 415 function similarly to non-thermal conductive areas 215 (described above). That is, non-thermal conductive areas 415 may be located at or near the top of layer 410 and be selected as a material that is relatively non-thermally conductive and that has a pleasing tactile feel and/or is relatively easy to grip.
Layer 510 may be stamped or coated with non-thermal conductive areas 515. Non-thermal conductive areas 515 function similarly to non-thermal conductive areas 215 (described above). That is, non-thermal conductive areas 515 may be located at or near the top of layer 510 and be selected as a material that is relatively non-thermally conductive and that has a pleasing tactile feel and/or is relatively easy to grip/hold.
Although dual function surface 115 is shown in
As described above, a dual function surface acts as a heat sink to dissipate heat while also including relatively good tactile qualities.
The foregoing description of the embodiments of the invention provides illustration and description, but is not intended to be exhaustive or to limit the invention to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention.
It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps, or components, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.
No element, act, or instruction used in the description of the present application should be construed as critical or essential to the invention unless explicitly described as such. Also, as used herein, the article “a” is intended to include one or more items. Where only one item is intended, the term “one” or similar language is used. Further, the phrase “based on,” as used herein is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
The scope of the invention is defined by the claims and their equivalents.
Claims
1. A device having an outer surface that comprises:
- a thermally conductive layer having an uneven surface and at least one other surface that is thermally coupled to a heat source, the uneven surface including a plurality of first areas that are higher than other areas of the uneven surface; and
- a plurality of second layer areas located on the first areas of the uneven surface.
2. The device of claim 1, wherein the plurality of second layer areas are non-thermally conductive.
3. The device of claim 1, wherein the plurality of second layer areas include a plastic material or an elastomer.
4. The device of claim 3, wherein the thermally conductive layer includes a metal.
5. The device of claim 1, wherein the thermally conductive layer acts as a heat sink for the device.
6. The device of claim 1, wherein the uneven surface of the thermally conductive layer includes a wave like contour.
7. The device of claim 1, wherein the uneven surface of the thermally conductive layer includes a hill like or box like contour.
8. The device of claim 1, wherein the plurality of second layer areas are formed of a material that is relatively easy to grip.
9. The device of claim 1, wherein the first areas of the uneven surface are separated from lower areas of the uneven surface by a distance ranging from approximately 0.2 to on the order of a few millimeters.
10. An electronic device comprising:
- a heat source; and
- an outer surface portion that includes a thermally conductive layer having an uneven surface and at least one other surface that is thermally coupled to the heat source, the uneven surface including a plurality of raised areas; and a plurality of second layer areas located on the raised areas of the uneven surface.
11. The electronic device of claim 10, wherein the electronic device is a mobile terminal or a portable computer.
12. The electronic device of claim 10, wherein the second layer areas include non-thermally conductive areas.
13. The electronic device of claim 12, wherein the plurality of second layer areas each include a plastic material or an elastomer.
14. The electronic device of claim 13, wherein the thermally conductive layer includes a metal.
15. The electronic device of claim 10, wherein the uneven surface includes a wave like contour.
16. The electronic device of claim 10, wherein the uneven surface includes a hill like contour or a box like contour.
17. The electronic device of claim 10, wherein the plurality of second layer areas are formed of a material is relatively easy to grip.
18. The electronic device of claim 10, wherein the raised areas of the uneven surface are separated from low areas of the uneven surface by approximately 0.2 millimeters to on the order of a few millimeters.
19. A dual function surface comprising:
- means for dispersing heat, the means for dispersing heat having a thermally conductive uneven surface; and
- means for insulating portions of the uneven surface with a material that is relatively non-thermally conductive.
20. The dual function surface of claim 19, wherein the material has a high coefficient of friction and a pleasant tactile feel.
21. The dual function surface of claim 19, wherein the uneven surface has a wave like contour.
Type: Application
Filed: Oct 19, 2006
Publication Date: Jun 26, 2008
Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB (Lund)
Inventors: Krister Nilsson (Bjarred), Maria Hugosson (Lund), Andreas Ryden (Malmo), Torbjorn Karlelid (Malmo), Florin Vantu (Malmo), Taro Takamoto (Malmo)
Application Number: 11/550,915