Patent ID: 11922869
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A display device, comprising:
a display panel including a plurality of pixels, which are grouped into pixel blocks;
a display panel driver configured to drive the display panel;
a memory device configured to store a reference current-temperature model that is set for the display panel, a global offset of the display panel, which is calculated based on the reference current-temperature model in a manufacturing stage of the display panel, and a local offset of the display panel, which is calculated based on a characteristic difference between the pixel blocks in the manufacturing stage; and
a panel temperature determiner configured to measure sensing currents flowing through the pixels when a temperature sensing voltage is applied to the pixels, calculate sensing current averages of the pixel blocks, calculate correction sensing current averages by applying the global offset and the local offset to the sensing current averages, and determine temperatures of the pixel blocks by substituting the correction sensing current averages into the reference current-temperature model,
wherein, in the manufacturing stage, an average temperature of the display panel is measured by a temperature sensing device,
wherein, in the manufacturing stage, initial sensing currents flowing through the pixels when the temperature sensing voltage is applied to the pixels are measured an average of the initial sensing currents is calculated, and a difference between a current mapped to the average temperature in the reference current-temperature model and the average of the initial sensing currents is determined as the global offset.