# US 2014/0191980 A1 · System for reuse of touch panel and controller by a secondary display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191980 A1 - Document ID: US20140191980A1 - Status: Published application - Kind: A1 - Application number: 13/753,235 - Filed: 2013-01-29 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: QUALCOMM MEMS Technologies, Inc. - Applicants: Qualcomm Mems Technologies, Inc. - Inventors: Pavankumar Mulabagal; Vaidyanathan Pallavur Ramasarma; Mithran Cheriyan Mathew - Web page: https://patentgrep.com/patent/US20140191980A1 ## 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 systems, methods and apparatus, including computer programs encoded on computer storage media, for controlling a display device that includes a first display, a touch screen disposed on the first display and a second display. In one aspect, the first display may be disposed on a first side of the display device (e.g., the front side) and the second display may be disposed on a second side of the display device (e.g., the back side). The second display may consume less power than the first display. Even when the first display is switched off, a control system may be configured to control the second display in response to input received from the touch screen disposed on the first display. The control system may be further configured to control the first display in response to input received from the touch screen when the first display is switched on or when the second display is not in use. ## Claims ### Claim 1 An apparatus, comprising: a first display; a touch screen disposed on the first display; a second display; and a control system configured to control the second display in response to input received from the touch screen even when the first display is powered off. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the control system is configured to switch the first display off when controlling the second display in response to input received from the touch screen. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the first display is disposed on a first side of the apparatus and the second display is disposed on a second side of the apparatus. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the first side is on an opposite side of the apparatus relative to the second side. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the second display consumes less power than the first display. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the second display is a reflective display. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the reflective display is an interferometric modulator (“IMOD”) display. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the first display is an emissive or a transmissive display. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the control system is further configured to control the first display in response to input received from the touch screen when the first display is switched on or when the second display is not in use. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the control system includes a higher-power processor core, wherein the control system is further configured to turn the higher-power processor core on or off according to a type of application that is being used to control the second display. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the control system includes a lower-power processor core and a higher-power processor core, wherein the control system is further configured to determine whether to use the higher-power processor core or the low-power processor core to control at least part of the apparatus. ### Claim 12 (depends on 1) The apparatus of claim 1, further comprising a motion sensor, wherein the control system is further configured to activate the touch screen if the control system receives an indication from the motion sensor that the apparatus has been moved from a stationary position. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the control system is further configured to deactivate the touch screen if the control system receives no indication that the apparatus has been moved, or that the touch screen has been used, for a period of time. ### Claim 14 (depends on 1) The apparatus of claim 1, further comprising an orientation sensor, wherein the control system is further configured to activate or deactivate the first display according to input from the orientation sensor. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein the control system is configured to process image data. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the control system further comprises: a driver circuit configured to send at least one signal to at least one of the first display or the second display; and a controller configured to send at least a portion of the image data to the driver circuit. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the control system further comprises: an image source module configured to send the image data to the processor, wherein the image source module includes at least one of a receiver, transceiver, and transmitter. ### Claim 18 (depends on 15) The apparatus of claim 15, further comprising: an input device configured to receive input data and to communicate the input data to the control system. ### Claim 19 (depends on 1) The apparatus of claim 1, wherein the control system is further configured to map touch screen areas to second display areas. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the size of the touch screen is different from the size of the second display. ### Claim 21 (depends on 1) The apparatus of claim 1, wherein the control system includes at least one of a general purpose single- or multi-chip processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the control system includes a system on a chip that includes the general purpose single- or multi-chip processor and one or more of the DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. ### Claim 23 A method, comprising: receiving input from a touch screen disposed on a first display of a display device; and controlling a second display of the display device in response to the input, wherein the controlling process is performed even when the first display is powered off. ### Claim 24 (depends on 23) The method of claim 23, wherein the display device includes a higher-power processor core, further comprising: determining a type of application that is being used to control the second display; and turning the higher-power processor core on or off according to the type of application. ### Claim 25 (depends on 23) The method of claim 23, wherein the display device includes a low-power processor core and a higher-power processor core, and wherein the method includes determining whether to use the higher-power processor core or the low-power processor core to control at least part of the display device. ### Claim 26 (depends on 23) The method of claim 23, wherein the display device includes a motion sensor and wherein the method includes activating the touch screen if the motion sensor indicates that the display device has been moved from a stationary position. ### Claim 27 (depends on 23) The method of claim 23, wherein the display device includes an orientation sensor and wherein the method includes activating or deactivating the first display according to input from the orientation sensor. ### Claim 28 (depends on 23) The method of claim 23, further including mapping touch screen areas to second display areas. ### Claim 29 (depends on 28) The method of claim 28, wherein the first display is on an opposite side of the display device relative to the second display. ### Claim 30 A non-transitory medium having instructions for the following processes stored thereon: receiving input from a touch screen disposed on a first display of a display device; and controlling a second display of the display device in response to the input, wherein the controlling process is performed even when the first display is powered off. ### Claim 31 (depends on 30) The non-transitory medium of claim 30, wherein the display device includes a higher-power processor core, wherein the medium includes instructions for: determining a type of application that is being used to control the second display; and turning the higher-power processor core on or off according to the type of application. ### Claim 32 (depends on 30) The non-transitory medium of claim 30, wherein the display device includes a low-power processor core and a higher-power processor core, and wherein the medium includes instructions for determining whether to use the higher-power processor core or the low-power processor core to control at least part of the display device. ### Claim 33 (depends on 30) The non-transitory medium of claim 30, wherein the display device includes a motion sensor and wherein the medium includes instructions for activating the touch screen if the motion sensor indicates that the display device has been moved from a stationary position. ### Claim 34 (depends on 30) The non-transitory medium of claim 30, wherein the display device includes an orientation sensor and wherein the medium includes instructions for activating or deactivating the first display according to input from the orientation sensor. ### Claim 35 (depends on 30) The non-transitory medium of claim 30, wherein the medium includes instructions for mapping touch screen areas to second display areas.