# US 2017/0285740 A1 · Improving readability of content displayed on a screen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285740 A1 - Document ID: US20170285740A1 - Status: Published application - Kind: A1 - Application number: 15/107,348 - Filed: 2016-04-05 - Published: 2017-10-05 - Earliest claimed: 2016-04-05 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Tomas JÖNSSON; Tommy ARNGREN; Stefan WÄNSTEDT; Peter ÖKVIST - Web page: https://patentgrep.com/patent/US20170285740A1 ## CPC - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G06F 3/0304: {Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042)} - G06F 3/0346: with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors - G06T 3/40: Scaling of whole images or parts thereof, e.g. expanding or contracting - G06T 7/55: from multiple images - G06T 7/97: {Determining parameters from multiple pictures (depth or shape recovery from multiple images G06T7/55; stereo camera calibration G06T7/85)} - G09G 5/26: for modifying the character dimensions, e.g. double width, double height - G06F 2200/1637: Sensing arrangement for detection of housing movement or orientation, e.g. for controlling scrolling or cursor movement on the display of an handheld computer - G06F 2203/04806: Zoom, i.e. interaction techniques or interactors for controlling the zooming operation - G06T 2207/30201: Face - G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen - G09G 2340/045: Zooming at least part of an image, i.e. enlarging it or shrinking it - G09G 2340/14: Solving problems related to the presentation of information to be displayed - G09G 2380/10: Automotive applications - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - 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) ## Abstract A device for improving readability of content displayed to a viewer is provided. The device has a screen for displaying the content, a motion sensor for measuring a displacement, and an eye tracker for measuring a change in gaze of the viewer when gazing at the screen. The device is operative to adjust the displayed content so as to improve its readability in response to determining that the change in gaze and the displacement of the device are out-of-sync. The out-of-sync condition may be determined by deriving a phase difference between the measured change in gaze and the measure displacement of the device, and comparing the derived phase difference to a threshold value. The displayed content is adjusted by at least one of increasing a font size of displayed text, enlarging one or more displayed graphical objects, and increasing a zoom level of the displayed content. ## Claims ### Claim 1 A device for improving readability of content displayed to a viewer, the device comprising: a screen for displaying the content to the viewer, a motion sensor for measuring a displacement of the device, and an eye tracker for measuring a change in gaze of the viewer when gazing at the screen, the device being configured to, determine that the change in gaze and the displacement of the device are out-of-sync by operations comprising: deriving a phase difference between the measured change in gaze and the measured displacement of the device, and determining that the change in gaze and the displacement of the device are out-of-sync if the derived phase difference exceeds a threshold value, and in response to determining that the change in gaze and the displacement of the device are out-of-sync, adjust the displayed content so as to improve the readability of the displayed content. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The device according to claim 1, being configured to adjust the displayed content gradually responsive to increasing derived phase difference. ### Claim 4 (depends on 1) The device according to claim 1, being configured to determine that the change in gaze and the displacement of the device are out-of-sync by further operations comprising: measuring at least one of an amplitude and a frequency of the displacement of the device, and determining that the change in gaze and the displacement of the device are out-of-sync if at least one of the measured amplitude and the measured frequency of the displacement of the device exceeds a corresponding threshold value. ### Claim 5 (depends on 1) The device according to claim 1, being configured to adjust the displayed content in response to determining that the change in gaze and the displacement of the device have been out-of-sync for a specified period of time. ### Claim 6 (depends on 1) The device according to claim 1, being configured to adjust the displayed content so as to improve readability by at least one of increasing a font size of displayed text, enlarging one or more displayed graphical objects, and increasing a zoom level of the displayed content. ### Claim 7 (depends on 1) The device according to claim 1, wherein the eye tracker comprises a camera configured for imaging the eye or eyes of the viewer, the device being configured to measure the change in gaze of the viewer by image processing a series of images captured by the camera. ### Claim 8 (depends on 7) The device according to claim 7, wherein the camera is mounted on the same face of the device as the screen. ### Claim 9 (depends on 1) The device according to claim 1, wherein the eye tracker comprises an infra-red light source and an infra-red light detector, the device being configured to measure the change in gaze of the viewer based on infra-red light originating from the infra-red light source and being reflected by the eye or eyes of the viewer and detected by the infra-red light detector. ### Claim 10 (depends on 1) The device according to claim 1, being a device for handheld operation. ### Claim 11 (depends on 1) The device according to claim 1, being one of a mobile phone, a smartphone, a tablet, a gaming console, a media player, and a laptop. ### Claim 12 (depends on 1) The device according to claim 1, being mounted in a vehicle. ### Claim 13 A method of a device, of improving readability of content displayed to a viewer, the method comprising: obtaining a measurement of a displacement of the device, obtaining a measurement of a change in gaze of the viewer when gazing at a screen comprised in the device, determining that the change in gaze and the displacement of the device are out-of-sync by operations comprising deriving a phase difference between the measured change in gaze and the measured displacement of the device, and determining that the change in gaze and the displacement of the device are out-of-sync if the derived phase difference exceeds a threshold value, and in response to determining that the change in gaze and the displacement of the device are out-of-sync, adjusting the displayed content so as to improve the readability of the displayed content. ### Claim 14 (canceled) ### Claim 15 (depends on 13) The method according to claim 13, wherein the displayed content is adjusted gradually responsive to increasing derived phase difference. ### Claim 16 (depends on 13) The method according to claim 13, wherein the determining that the change in gaze and the displacement of the device are out-of-sync comprises: measuring at least one of an amplitude and a frequency of the displacement of the device, and determining that the change in gaze and the displacement of the device are out-of-sync if at least one of the measured amplitude and the measured frequency of the displacement of the device exceeds a corresponding threshold value. ### Claim 17 (depends on 13) The method according to claim 13, wherein the displayed content is adjusted in response to determining that the change in gaze and the displacement of the device have been out-of-sync for a specified period of time. ### Claim 18 (depends on 13) The method according to claim 13, wherein the adjusting the displayed content so as to improve readability comprises at least one of increasing a font size of displayed text, enlarging one or more displayed graphical objects, and increasing a zoom level of the displayed content. ### Claim 19 (depends on 13) The method according to claim 13, wherein the obtaining the measurement of the change in gaze of the viewer comprises image processing a series of images captured by a camera comprised in the device and being configured for imaging the eye or eyes of the viewer. ### Claim 20 (depends on 19) The method according to claim 19, wherein the camera is mounted on the same face of the device as the screen. ### Claim 21 (depends on 13) The method according to claim 13, wherein the obtaining the measurement of the change in gaze of the viewer comprises detecting infra-red light by an infra-red light detector comprised in the device, which infra-red light is originating from an infra-red light source comprised in the device and being reflected by the eye or eyes of the viewer. ### Claim 22 (depends on 13) The method according to claim 13, wherein the device is a device for handheld operation. ### Claim 23 (depends on 13) The method according to claim 13, wherein the device is one of a mobile phone, a smartphone, a tablet, a gaming console, a media player, and a laptop. ### Claim 24 (depends on 13) The method according to claim 13, wherein the device is mounted in a vehicle. ### Claim 25 A computer program product comprising a non-transitory computer readable storage medium storing instructions that when executed by a processor of a device cause the device to perform operations comprising: obtaining a measurement of a displacement of the device, obtaining a measurement of a change in gaze of a viewer when gazing at a screen comprised in the device, determining that the change in gaze and the displacement of the device are out-of-sync by operations comprising deriving a phase difference between the measured change in gaze and the measured displacement of the device, and determining that the change in gaze and the displacement of the device are out-of-sync if the derived phase difference exceeds a threshold value, and in response to determining that the change in gaze and the displacement of the device are out-of-sync, adjusting the displayed content so as to improve the readability of the displayed content. ### Claim 26 (canceled) ### Claim 27 (depends on 1) The device according to claim 1, wherein: the device is further configured to generate the threshold value based on measurements of the determined phase difference that are determined to be associated with when one or more viewers chooses to cease gazing at content displayed on the viewer. ### Claim 28 (depends on 13) The method according to claim 13, further comprising: generating the threshold value based on measurements of the determined phase difference that are determined to be associated with when one or more viewers chooses to cease gazing at content displayed on the viewer. ### Claim 29 (depends on 25) The computer program product according to claim 25, wherein the operations further comprise: generating the threshold value based on measurements of the determined phase difference that are determined to be associated with when one or more viewers chooses to cease gazing at content displayed on the viewer.