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Electronic device and heat spreader

專利號
US10524389B2
公開日期
2019-12-31
申請人
RICOH COMPANY, LTD.（JP Tokyo）
發(fā)明人
Koichi Muramatsu
IPC分類
H05K7/20; H05K1/18; H05K5/00; H05K1/02; H04N5/225
技術(shù)領(lǐng)域
spreader,heat,thermal,conductive,board,package,medium,5a,pickup,circuit
地域： Tokyo

摘要

An electronic device includes: a circuit board with mounted components including a heat-generating electronic element mounted thereon; a casing configured to internally hold the circuit board; and a heat spreader configured to be held in the casing together with the circuit board, the heat spreader being formed by enclosing a liquid or paste-like thermal conductive medium in a flexible package and configured to deform to conform to a three-dimensional shape of the heat-generating electronic element and periphery thereof on the circuit board.

說明書

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
TECHNICAL FIELD

The present invention relates generally to electronic devices and heat spreaders.

BACKGROUND ART

A wide variety of “electronic device”, such as personal computers and image pickup devices, e.g., digital cameras and video cameras, are known.

Such electronic device is typically structured such that a circuit board, on which “mounted components including an electronic element” are mounted, is held by a casing.

Examples of the mounted components mounted on the circuit board include a heat-generating electronic device, such as a processing chip, that “generates heat when used”.

Because the heat-generating electronic element generates heat during operation, if the generated heat is not managed properly, the temperature of the electronic element rises high and can hinder the electronic element from functioning appropriately and/or adversely affect functions of mounted components near the electronic element.

As a method for managing heat generated by a heat-generating electronic element, “a method of conducting generated heat to the outside using a heat conductor, thereby releasing the heat” is known. Such a method is disclosed in patent literature 1 and patent literature 2.

SUMMARY OF INVENTION Technical Problem

In view of the conventional arts, there is a need to provide novel electronic device provided with a function of managing heat generated by the electronic device.

Solution to Problem

權(quán)利要求

1
The invention claimed is:1. A camera, An electronic device comprising:a first circuit board with mounted components including a heat-generating electronic element mounted thereon;a second circuit board that faces the first circuit board;a casing configured to internally hold the first circuit board and the second circuit board;a heat spreader configured to be held between the first circuit board and the second circuit board; andtwo lenses, at the casing, facing in opposite directions, wherein a line extending perpendicularly through a face of one of the two lenses also extends through another of the two lenses,wherein:the heat spreader includes a liquid or paste-like thermal conductive medium entirely enclosed in a flexible package and is configured to deform to conform to a three-dimensional shape of the heat-generating electronic element and periphery thereof on the first circuit board.2. The camera according to claim 1, whereinthe heat spreader makes direct contact with at least the heat-generating electronic element.3. The camera according to claim 1, whereinthe heat spreader makes contact, via a sheet-type thermal conductor, with at least the heat-generating electronic element.4. The camera according to claim 1, wherein the thermal conductive medium enclosed in the package is liquid.5. The camera according to claim 1, whereinthe thermal conductive medium enclosed in the package is paste-like.6. The camera according to claim 1, whereinthe paste-like thermal conductive medium is made from a plurality of kinds of materials and hardens with time.7. The camera according to claim 1, including an image pickup unit including a lens and configured as an image pickup device.8. The camera according to claim 1, whereinthe package is a polyethylene film.9. The camera according to claim 1, wherein the package is partially filled by the liquid or paste-like thermal conductive medium and an unfilled portion of the package is deaereated.10. The camera according to claim 1, wherein the second circuit board presses the package in a thickness direction to flexibly deform the liquid or paste-like thermal conductive medium.11. The camera according to claim 1, further comprising:a sheet-type thermal conductor between the heat spreader and the heat-generating electronic element,wherein an area of the sheet-type thermal conductor larger than an area of the heat-generating electronic element.12. The camera according to claim 1, wherein the lenses are at least one quarter of a width of a corresponding surface of the electronic device at which the lenses are disposed.
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