METHOD FOR SENSING LIGHT

• Main Authors: Kriebernegg, Josef, Greimel-Rechling, Bernhard, Lechner, Joachim
• Format: Patent
• Language: English; French; German
• Published: 25.08.2021
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

A method is proposed for sensing light being incident on an electronic device (1). The electronic device (1) comprises a display (11) and a light sensor arrangement (12) which is mounted behind the display (11) such as to receive incident light through the display. The method comprises the step of repeatedly switching the display (11) on and off depending on a modulation signal (MS), wherein a sub-frame (SFR) is defined by an on-state (ON) and a consecutive off-state (OFF) of the display (11). The modulation signal (MS) depends on at least one modulation parameter (MP). In a first sub-frame (SFR1) a display brightness is set to a first level (DL1) depending on a first value (MP1) of the at least one modulation parameter (MP). Then a first frame count (FC1) is determined by integrating the incident light by means of the light sensor arrangement (12) during the first sub-frame (FC1). In a second sub-frame (FC2) the display brightness is set to a second level (DL2) depending on a second value (MP2) of the at least one modulation parameter (MP). Then a second frame count (FC2) is generated by integrating the incident light by means of the light sensor arrangement (12) during the second frame (FC2). Finally, an ambient light level (AL) is determined depending on the first frame count (FC1) and the second frame count (FC2).