Self-calibrating illumination modules for display backlight

A method comprising:

• at a self-calibrating illumination module of a backlight panel of a display device:
• controlling a current supplied to at least one light source based at least on a calibration target value to cause the at least one light source to emit light;
• detecting, via a light sensor, an intensity of the light emitted from the at least one light source that is internally reflected within the display device;
• determining a calibration factor for the self-calibrating illumination module based at least on a comparison between the calibration target value and the detected intensity of the light emitted from the at least one light source;
• receiving, via a system bus of a display device, a dimming target value for at least one light source of the illumination module;
• determining a module dimming factor based at least on the received dimming target value;
• and
• controlling the current supplied to the at least one light source based at least on the determined calibration factor and the module dimming factor;
• wherein the current supplied to the at least one light source is controlled at a calibration opportunity including:
• the dimming target value of the at least one light source being determined by a controller to be above a predetermined intensity threshold for a brightness of the at least one light source.

A self-calibrating illumination module for a backlight panel of a display device comprising:

• at least one light source;
• at least one light sensor arranged adjacently to the at least one light source, the at least one light sensor being configured to detect light emitted from the at least one light source that is internally reflected within the display device;
• and
• a controller configured to control a current supplied to the at least one light source based at least on an intensity of light detected by the at least one light sensor;
• wherein the controller of the self-calibrating illumination module is configured to, at a calibration phase:
• control the current supplied to the at least one light source based at least on a calibration target value to cause the at least one light source to emit light;
• detect, via the at least one light sensor, an intensity of the light emitted from the at least one light source that is internally reflected within the display device;
• and
• determine a calibration factor for the self-calibrating illumination module based at least on a comparison between the calibration target value and the detected intensity of the light emitted from the at least one light source;
• wherein the calibration phase is performed by the self-calibrating illumination module at a calibration opportunity including:
• a dimming target value of the at least one light source being determined by the controller to be above a predetermined intensity threshold for a brightness of the at least one light source.