US 12,293,729 B2
Optoelectronic device
Jonathan Steckel, Corenc (FR); Giovanni Conti, Acireale (IT); Gaetano L'Episcopo, Catania (IT); Mario Antonio Aleo, Catania (IT); and Carmelo Occhipinti, Paterno (IT)
Assigned to STMicroelectronics (Grenoble 2) SAS, Grenoble (FR); and STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics (Grenoble 2) SAS, Grenoble (FR); and STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on Dec. 4, 2023, as Appl. No. 18/527,968.
Application 18/527,968 is a continuation in part of application No. 18/209,605, filed on Jun. 14, 2023.
Claims priority of application No. 22305890 (EP), filed on Jun. 17, 2022.
Prior Publication US 2024/0105129 A1, Mar. 28, 2024
Int. Cl. G09G 3/34 (2006.01); H01L 25/16 (2023.01)
CPC G09G 3/3406 (2013.01) [H01L 25/167 (2013.01); G09G 2320/02 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0693 (2013.01); G09G 2360/148 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of controlling a backlight panel of an optoelectronic device, comprising:
applying a first driving signal, by a control circuit of the backlight panel, to activate one or more light emitting diodes of a subpixel of a first light emitting pixel of the backlight panel;
wherein each first light emitting pixel comprises said subpixel and at least one photodetector;
detecting, by the at least one photodetector, an amount of reflected light emitted by said subpixel;
wherein the backlight panel comprises an array of light emitting pixels for illuminating a display panel of the optoelectronic device;
generating, by the control circuit, the first driving signal based on a first offset value corresponding to a first calibration point associated with said subpixel;
applying a second driving signal, by the control circuit, to activate said one or more light emitting diodes of said subpixel of said first light emitting pixel of the backlight panel;
generating, by the control circuit, the second driving signal based on a second offset value corresponding to a second calibration point, associated with said subpixel, and different from the first calibration point;
comparing the detected amount of reflected light with a respective calibration point associated to said at least one subpixel, within a tolerance range; and
adjusting the level of light emission of said subpixel as function of the comparison by supplying the second driving signal to said subpixel.