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Method for mobile display area control when HOT Disclosure Number: IPCOM000240440D
Publication Date: 2015-Jan-30
Document File: 3 page(s) / 210K

Publishing Venue

The Prior Art Database

Related People

Cavallaro, Alberto: INVENTOR [+2]


The phone determines mobile warnings to eliminate handling of a hot phone from a cradle position by using existing features. The logic uses a combination of existing elements that entails - determining which area of the display remains cool - creating an area of the display that is active with keypad controls in the cool region and creating an area of the display that is inactive to touch in the hot region

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Date:                           2/14/2011

Title:                            Method for mobile display area control when HOT

Docket No.:              CS38251 (62441)

Author #1

Name:                                    Alberto Cavallaro


Author #2

Name:                                    Martin Pais



Method for mobile display area when HOT

By Alberto Cavallaro, Martin Pais

Motorola Mobility, Inc.




Smart mobile device external surfaces are getting increasingly warmer affecting the ability to handle and interact with them comfortably, thus impacting the user experience.  The ability to quantify the operating temperature of the mobile and identify the thermal gradients within affords an opportunity to selectively modify Ithe display as active for user touch operations.  As a result the user benefits by being able to interact with the cooler device regions unimpeded by an otherwise warm device.


Smart phones have been utilizing faster and more powerful processors to support new features and capabilities.  This trend has resulted in an increase in heat generation and is reason for the mobile surface temperature reaching uncomfortable levels to the touch though the internal electronics operate within a reliable range.

Use cases over and above a voice call, such as with video streaming, GPS navigation, etc. aggravate this problem.

It is noted that the temperature of the mobile is not uniform and certain areas remain cool while other are sensibly hotter.


It is observed that the user will handle the device with a bias toward holding the cooler areas.  The mobile needs a way to direct the user away from the warmer areas.


The mobile device has thermal monitoring capabilities and an understanding of the power dissipation and temperature gradients within the system based on the use case.  The temper...