Control of led array in a liquid crystal display assembly

A display assembly comprising:

• a display unit having a liquid crystal layer and an LED array configured to illuminate the liquid crystal layer, the display unit configured to display an image;
• a driver circuit operatively connected to the LED array, the driver circuit being configured to control a luminance of the LED array;
• a control module operatively connected to both the display unit and the driver circuit, the control module including a processor and tangible, non-transitory memory on which is recorded instructions for executing a method for controlling the LED array in the display unit;
• a voltage-measuring device operatively connected to the LED array:
• wherein execution of the instructions by the processor causes the control module to obtain a junction temperature (TJ) of the LED array, via the driver circuit;
• wherein the junction temperature (TJ) is based at least partially on a first voltage (V1), a second voltage (V2) and a predetermined coefficient (Tcoefficient);
• wherein the control module is programmed to enter one of a plurality of stages based at least partially on the junction temperature (TJ);
• wherein the driver circuit is programmed to apply a predefined first current to the LED array for a first time interval;
• wherein the driver circuit is programmed to apply a predefined second current to the LED array for a second time interval;
• and
• wherein the control module is programmed to obtain the first voltage (V1) during the first time interval and the second voltage (V2) during the second time interval, via the voltage-measuring device.

A method for controlling a display assembly having a display unit with a liquid crystal layer and an LED array configured to illuminate the liquid crystal layer, the display unit being configured to display an image, the assembly further including a driver circuit configured to control a luminance of the LED array, and a control module having a processor, and tangible, non-transitory memory on which is recorded instructions, the method comprising:

• obtaining a junction temperature (TJ) of the LED array, via the driver circuit, the junction temperature (TJ) being based at least partially on a first voltage (V1), a second voltage (V2) and a predetermined coefficient (Tcoefficient);
• entering one of a plurality of stages based at least partially on the junction temperature (TJ), via the control module;
• determining if an image content is available for displaying the image, via the control module;
• and
• entering a first stage of the plurality of stages when the image content is not available and the junction temperature (TJ) is at or below a first threshold temperature (T1), via the control module.