# US 2014/0191926 A1 · Device and method for rendering content to multiple displays > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191926 A1 - Document ID: US20140191926A1 - Status: Published application - Kind: A1 - Application number: 13/829,757 - Filed: 2013-03-14 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: QUALCOMM MEMS Technologies, Inc. - Applicants: Qualcomm Mems Technologies, Inc. - Inventors: Mithran Mathew; Nathan Ramasarma - Web page: https://patentgrep.com/patent/US20140191926A1 ## CPC - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 1/1643: {the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615)} - G06F 1/1647: {including at least an additional display (G06F1/1692 takes precedence)} - G06F 1/28: Supervision thereof, e.g. detecting power-supply failure by out of limits supervision - G06F 1/3218: of display devices - G06F 1/3287: by switching off individual functional units in the computer system - G06F 3/0481: based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance - G09G 5/003: {Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto (specific for a CRT G09G1/165; for a flat panel G09G3/2092)} - H04M 1/0202: {Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets (constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03)} - G06F 2203/04803: Split screen, i.e. subdividing the display area or the window area into separate subareas - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H04M 2250/16: including more than one display unit - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - Y02D 30/50: in wire-line communication networks, e.g. low power modes or reduced link rate - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract This disclosure provides methods and apparatus, including non-transitory processor instructions on computer storage media, which enable a dual-display device to automatically select and render content to a display. Dual-display devices may include devices with a primary and a secondary display, the secondary display consuming less power than the primary display and having reduced glare when viewed in sunlight. In one aspect, the selection of the display may be based upon at least two of: a battery state of the device, an ambient illumination, and an item of content to be displayed. ## Claims ### Claim 1 A method comprising: determining, by a processor of a device, a parameter based at least in part on an algorithm that evaluates at least two of: a battery state of the device, an ambient illumination, and an item of content to be displayed; selecting at least one selected display from among a primary display and a secondary display based at least in part on the determined parameter; and displaying the item of content on the at least one selected display. ### Claim 2 (depends on 1) The method of claim 1, wherein the secondary display consumes less power than the primary display. ### Claim 3 (depends on 1) The method of claim 1, wherein one of the primary display and the secondary display is a transmissive display, an emissive display, a transflective display, or a reflective display. ### Claim 4 (depends on 1) The method of claim 1, further comprising scaling the item of content for the selected display prior to displaying the item of content. ### Claim 5 (depends on 1) The method of claim 1, wherein the algorithm comprises: evaluating the ambient illumination against a light threshold; evaluating a battery charge level against a battery charge threshold; and evaluating the item of content to obtain a content type based at least in part on one or more of whether the item of content is interactive, on an amount of text content relative to an amount of image content in the item of content, on the rate of change of the item of content, or on the resolution of the item of content. ### Claim 6 (depends on 5) The method of claim 5, wherein the selecting is also based at least in part on a device setting. ### Claim 7 (depends on 1) The method of claim 1, wherein the algorithm comprises: evaluating a set of rules, in no particular order, which update the parameter, the set of rules including: updating the parameter based on the ambient illumination as measured by a light sensor; updating the parameter based on an amount of text within the item of content; updating the parameter based on an amount of color within the item of content; and updating the parameter based on a charge level obtained from the battery state of the device. ### Claim 8 (depends on 7) The method of claim 7, wherein the selecting comprises: selecting the primary display if the parameter is greater than or equal to a first threshold; selecting the secondary display if the parameter is less than or equal to a second threshold; and selecting either the primary display or the secondary display, whichever was previously selected, if the parameter is between the first threshold and the second threshold. ### Claim 9 (depends on 1) The method of claim 1, wherein the algorithm further evaluates at least one of: an orientation of the device, whether a surface of the device is adjacent to another surface, and whether the device is controlling another device. ### Claim 10 An apparatus comprising: a primary display; a secondary display; and a processor configured to communicate with the primary display and the secondary display, the processor further configured to determine a parameter based at least in part on an algorithm that evaluates at least two of: a battery state of the device, an ambient illumination, an item of content to be displayed, and a setting of the device, the processor further configured to select at least one selected display from among a primary display and a secondary display based at least in part on the determined parameter and to display the item of content on the selected display. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the secondary display consumes less power than the primary display. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein one of the primary display and the secondary display is a transmissive display, an emissive display, a transflective display, or a reflective display. ### Claim 13 (depends on 10) The apparatus of claim 10, wherein the processor is further configured to scale the item of content for the selected display. ### Claim 14 (depends on 10) The apparatus of claim 10, wherein the algorithm comprises: evaluating the ambient illumination against a light threshold, the ambient illumination as measured by a light sensor; evaluating a charge level against a charge threshold, the charge level obtained from the battery state of the device; and evaluating the item of content to obtain a content type based at least in part on whether the item of content is interactive, on an amount of text content relative to an amount of image content in the item of content, on the rate of change of the item of content, or on the resolution of the item of content. ### Claim 15 (depends on 10) The apparatus of claim 10, wherein the secondary display is removable. ### Claim 16 (depends on 10) The apparatus of claim 10, wherein the secondary display stores user preferences. ### Claim 17 (depends on 10) The apparatus of claim 10, wherein the primary display and the secondary display are simultaneously viewable. ### Claim 18 (depends on 10) The apparatus of claim 10, wherein the device includes a frontlight to illuminate at least one of the displays. ### Claim 19 (depends on 10) The apparatus of claim 10, wherein the algorithm comprises: evaluating a set of rules, in no particular order, which update the parameter, the set of rules including: updating the parameter based on the ambient illumination as measured by a light sensor; updating the parameter based on an amount of text within the item of content; updating the parameter based on an amount of color within the item of content; and updating the parameter based on a charge level obtained from the battery state of the device. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the processor selection comprises: selecting the primary display if the parameter is greater than or equal to a first threshold; selecting the secondary display if the parameter is less than or equal to a second threshold; and selecting either the primary display or the secondary display, whichever was previously selected, if the parameter is between the first threshold and the second threshold. ### Claim 21 (depends on 10) The apparatus of claim 10, wherein the algorithm further evaluates at least one of: an orientation of the device, whether a surface of the device is adjacent to another surface, and whether the device is controlling another device. ### Claim 22 A non-transitory, computer readable storage medium having instructions stored thereon that cause a processing circuit to perform a method comprising: determining, by a processor of a device, a parameter based at least in part on an algorithm that evaluates at least two of: a battery state of the device, an ambient illumination, an item of content to be displayed, and a setting of the device; selecting at least one selected display from among a primary display and a secondary display based at least in part on the determined parameter; and displaying the item of content on the selected display. ### Claim 23 (depends on 22) The computer readable storage medium of claim 22, wherein the method further comprises scaling the item of content for the selected display prior to displaying the item of content. ### Claim 24 (depends on 22) The computer readable storage medium of claim 22, wherein the algorithm comprises: evaluating the ambient illumination against a light threshold, the ambient illumination as measured by a light sensor; evaluating a charge level against a charge threshold, the charge level obtained from the battery state of the device; and evaluating the item of content to obtain a content type based at least in part on whether the item of content is interactive, on an amount of text content relative to an amount of image content in the item of content, on the rate of change of the item of content, or on the resolution of the item of content. ### Claim 25 (depends on 24) The computer readable storage medium of claim 24, wherein the selecting is also based at least in part on a device setting. ### Claim 26 (depends on 22) The computer readable storage medium of claim 22, wherein the algorithm comprises: evaluating a set of rules, in no particular order, which update the parameter, the set of rules including: updating the parameter based on the ambient illumination as measured by a light sensor; updating the parameter based on an amount of text within the item of content; updating the parameter based on an amount of color within the item of content; and updating the parameter based on a charge level obtained from the battery state of the device. ### Claim 27 (depends on 22) The computer readable storage medium of claim 22, wherein the selecting comprises: selecting the primary display if the parameter is greater than or equal to a first threshold; selecting the secondary display if the parameter is less than or equal to a second threshold; and selecting either the primary display or the secondary display, whichever was previously selected, if the parameter is between the first threshold and the second threshold. ### Claim 28 (depends on 22) The computer readable storage medium of claim 22 wherein the algorithm further evaluates at least one of: an orientation of the device, whether a surface of the device is adjacent to another surface, and whether the device is controlling another device.