Display apparatus and controlling method thereof for modifying obtained average brightness value based on heating estimation data

A method of controlling a display apparatus comprising:

• obtaining an average brightness value corresponding to an input image based on a gray level value of the input image;
• obtaining heating estimation data of the input image based on the gray level value of the input image and heating characteristic information of each of a red (R) sub-pixel, a green (G) sub-pixel and a blue (B) sub-pixel included in each of a plurality of light emitting diode (LED) pixels, the heating characteristic information including power information of each of the red-R sub-pixel, the G sub-pixel, and the B sub-pixel separately correlated for each gray level;
• modifying the obtained average brightness value based on the heating estimation data;
• and
• driving a display panel including the plurality of LED pixels based on the modified average brightness value,
• wherein the heating characteristic information comprises a first rate of change of heat conversion corresponding to a first color sub-pixel among the R sub-pixel, the G sub-pixel, and the B sub-pixel, and a second rate of change of heat conversion corresponding to a second color sub-pixel among the R sub-pixel, the G sub-pixel, and the B sub-pixel, and
• wherein the first rate of change increases faster than the second rate of change corresponding to an increase in temperature.

A display apparatus comprising:

• a display panel comprising a plurality of light emitting diode (LED) pixels;
• a panel driver configured to provide a driving signal to the display panel to drive the display panel;
• a memory storing heating characteristic information of each of a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel included in each of the plurality of LED pixels;
• and
• a processor configured to:
• obtain an average brightness value corresponding to an input image based on a gray level value of the input image,
• obtain heating estimation data of the input image based on the gray level value of the input image and the heating characteristic information stored in the memory, the heating characteristic information including power information of each of the R sub-pixel, the G sub-pixel, and the B sub-pixel separately correlated for each gray level,
• modify the obtained average brightness value based on the heating estimation data, and
• control the panel driver based on the modified average brightness value,
• wherein the heating characteristic information comprises first heat conversion rate information including a first rate of change of heat conversion corresponding to the R sub-pixel, second heat conversion rate information including a second rate of change of heat conversion corresponding to the G sub-pixel, and third heat conversion rate information including a third rate of change of heat conversion corresponding to the B sub-pixel, and
• wherein the first rate of change is greater than the second rate of change.