Electronic device with heat spreading film
First Claim
1. A display, comprising:
- display layers including a layer of liquid crystal material;
backlight structures that supply backlight that passes through the display layers; and
a heat spreading layer that is attached to the backlight structures, wherein the heat spreading layer includes patterned adhesive that attaches first portions of the heat spreading layer to the backlight structures and that does not attach second portions of the heat spreading layer to the backlight structures, wherein the heat spreading layer is positioned in a first position at a first temperature and a second position at a second temperature, wherein in the first position the first and second portions of the heat spreading layer are separated from a metal midplate by an air gap, wherein in the second position the first portions of the heat spreading layer are separated from the metal midplate by the air gap and the second portions of the heat spreading layer directly contact the metal midplate, and wherein the second temperature is greater than the first temperature.
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Accused Products
Abstract
An electronic device may have a housing in which components are mounted that produce heat. The heat producing components may be light-emitting diodes mounted on a flexible printed circuit in a display backlight, may be integrated circuits, or may be other devices that generate heat during operation. A heat spreading layer such as a layer of graphite may be attached to the backlight unit or other structures in the electronic device using adhesive. The adhesive may be patterned to form an unbonded area between at least some of the backlight unit or other structures to which the heat spreading layer is being attached and the heat spreading layer. The heat spreading layer may be mounted adjacent to a housing structure such as a metal midplate member that is attached to housing walls in the housing.
23 Citations
20 Claims
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1. A display, comprising:
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display layers including a layer of liquid crystal material; backlight structures that supply backlight that passes through the display layers; and a heat spreading layer that is attached to the backlight structures, wherein the heat spreading layer includes patterned adhesive that attaches first portions of the heat spreading layer to the backlight structures and that does not attach second portions of the heat spreading layer to the backlight structures, wherein the heat spreading layer is positioned in a first position at a first temperature and a second position at a second temperature, wherein in the first position the first and second portions of the heat spreading layer are separated from a metal midplate by an air gap, wherein in the second position the first portions of the heat spreading layer are separated from the metal midplate by the air gap and the second portions of the heat spreading layer directly contact the metal midplate, and wherein the second temperature is greater than the first temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic device, comprising:
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a housing that includes a metal midplate member; display layers including a layer of liquid crystal material; backlight structures that supply backlight that passes through the display layers; and a flexible heat spreading layer that is attached to the backlight structures, wherein at first temperature the entire flexible heat spreading layer is separated from the metal midplate member by an air gap, wherein at a second temperature at least a portion of the flexible heat spreading layer expands across the air gap to contact the metal midplate member, wherein the second temperature is greater than the first temperature, and wherein the flexible heat spreading layer is heated from the first temperature to the second temperature by heat generated by the backlight structures. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus, comprising:
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a flexible structure that is supplied with heat in an electronic device, wherein the flexible structure is a flexible structure selected from the group consisting of;
an organic light-emitting diode display and a flexible printed circuit in a backlight unit; anda flexible heat spreading layer having adhesive that is patterned to attach the flexible heat spreading layer to the flexible structure so that there is at least one unbonded region of the flexible heat spreading layer that is free of adhesive, wherein the unbonded region is interposed between first and second regions of the flexible heat spreading layer that are attached to the flexible structure with the adhesive, wherein at a first temperature the entire flexible heat spreading layer is separated from a metal structure by and air gap, wherein at a second temperature at least a portion of the unbonded region of the flexible heat spreading layer extends across the air gap to directly contact the metal structure, and wherein the second temperature is greater than the first temperature. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification