Method for compensating temperature and display apparatus

1 . A temperature compensation method comprising:

setting an on-pulse width of an emission signal according to luminance of pixels of a display device based on optical compensation;

generating a first linear function graph and a second linear function graph by measuring luminance in relation to the on-pulse width of the emission signal set at first and second temperatures, respectively;

generating a target linear function graph relating the on-pulse width of the emission signal set and a luminance at a target temperature based on the first and second linear function graphs; and

adjusting the on-pulse width of the emission signal set based on the target linear function graph.

2 . The temperature compensation method according to claim 1 , wherein the generating of the target linear function graph includes:

calculating respective slope values and offset values of the first and second linear function graphs from the first and second linear function graphs; and

calculating coefficient values and parameter values related to temperature using the slope values and the offset values.

3 . The temperature compensation method according to claim 2 , wherein the generating of the target linear function graph includes:

calculating a slope value and an offset value of the target linear function graph using the coefficient values and the parameter values; and

generating the target linear function graph using the slope value and the offset value of the target linear function graph.

4 . The temperature compensation method according to claim 3 , wherein the adjusting of the on-pulse width of the emission signal set includes:

generating a display panel linear function graph relating the on-pulse width of the emission signal set and a luminance at a temperature at which the optical compensation is performed, based on the first and second linear function graphs; and

converting the on-pulse width of the emission signal set on the display panel linear function graph for the same luminance into the on-pulse width of the emission signal set on the target linear function graph.

5 . The temperature compensation method according to claim 4 , wherein:

the coefficient values related to temperature include a first coefficient value and a second coefficient value,

the first coefficient value is a value obtained by dividing a difference between the slope value of the first linear function graph and the slope value of the second linear function graph by a difference between the first temperature and the second temperature,

the second coefficient value is a value obtained by dividing a difference between the offset value of the first linear function graph and the offset value of the second linear function graph by a difference between the first temperature and the second temperature,

the parameter values related to temperature include a first parameter value and a second parameter value,

the first parameter value is a value obtained by subtracting a value obtained by multiplying the first coefficient value and the first temperature from the slope value of the first linear function graph, and

the second parameter value is a value obtained by subtracting a value obtained by multiplying the second coefficient value and the first temperature from the offset value of the first linear function graph.

6 . The temperature compensation method according to claim 5 , wherein:

the slope value of the target linear function graph is a value obtained by adding the first parameter value to a value obtained by multiplying the first coefficient value and the target temperature, and

the offset value of the target linear function graph is a value obtained by adding the second parameter value to a value obtained by multiplying the second coefficient value and the target temperature.

7 . The temperature compensation method according to claim 5 , wherein:

the slope value of the display panel linear function graph is a value obtained by adding the first parameter value to a value obtained by multiplying the first coefficient value and a temperature at which optical compensation is performed, and

the offset value of the display panel linear function graph is a value obtained by adding the second parameter value to a value obtained by multiplying the second coefficient value and the temperature at which optical compensation is performed.

8 . The temperature compensation method according to claim 1 , wherein a temperature at which the optical compensation is performed and the first temperature are room temperature, and

the second temperature is a temperature higher than the first temperature.

9 . The temperature compensation method according to claim 8 , wherein the temperature at which optical compensation is performed, the first temperature, and the second temperature are obtained by sensing a temperature inside a display panel of the display apparatus.

10 . The temperature compensation method according to claim 1 , wherein the light-emitting elements of the pixels include micro LEDs.

11 . A display apparatus comprising:

a display panel including pixels;

a memory configured to store data; and

a processor configured to control the memory and perform computation using the data,

wherein the processor is configured to:

set an on-pulse width of an emission signal according to luminance of the pixels based on optical compensation,

generate a first linear function graph and a second linear function graph by measuring luminance in relation to the on-pulse width of the emission signal set at first and second temperatures, respectively,

generate a target linear function graph relating the on-pulse width of the emission signal set and a luminance at a target temperature based on the first and second linear function graphs, and

adjust the on-pulse width of the emission signal set based on the target linear function graph.

12 . The display apparatus according to claim 11 ,

wherein the processor is configured to:

calculates respective slope values and offset values of the first and second linear function graphs from the first and second linear function graphs, and

calculate coefficient values and parameter values related to temperature based on the slope values and the offset values.

13 . The display apparatus according to claim 12 ,

wherein the processor is configured to:

calculate a slope value and an offset value of the target linear function graph using the coefficient values and the parameter values, and

generate the target linear function graph using the slope value and the offset value of the target linear function graph.

14 . The display apparatus according to claim 13 ,

wherein the processor is configured to:

generate a display panel linear function graph relating the on-pulse width of the emission signal set and a luminance at a temperature at which the optical compensation is performed, based on the first and second linear function graphs, and

convert the on-pulse width of the emission signal on the display panel linear function graph for the same luminance into the on-pulse width of the emission signal on the target linear function graph, and

wherein the memory is configured to:

store the converted on-pulse width of the emission signal corresponding to the luminance.

15 . The display apparatus according to claim 14 ,

wherein the coefficient values related to temperature include a first coefficient value and a second coefficient value,

the first coefficient value is a value obtained by dividing a difference between the slope value of the first linear function graph and the slope value of the second linear function graph by a difference between the first temperature and the second temperature,

the second coefficient value is a value obtained by dividing a difference between the offset value of the first linear function graph and the offset value of the second linear function graph by a difference between the first temperature and the second temperature,

the parameter values related to temperature include a first parameter value and a second parameter value,

the first parameter value is a value obtained by subtracting a value obtained by multiplying the first coefficient value and the first temperature from the slope value of the first linear function graph, and

the second parameter value is a value obtained by subtracting a value obtained by multiplying the second coefficient value and the first temperature from the offset value of the first linear function graph.

16 . The display apparatus according to claim 15 ,

wherein the slope value of the target linear function graph is a value obtained by adding the first parameter value to a value obtained by multiplying the first coefficient value and the target temperature, and

the offset value of the target linear function graph is a value obtained by adding the second parameter value to a value obtained by multiplying the second coefficient value and the target temperature.

17 . The display apparatus according to claim 15 ,

wherein the slope value of the display panel linear function graph is a value obtained by adding the first parameter value to a value obtained by multiplying the first coefficient value and a temperature at which optical compensation is performed, and

the offset value of the display panel linear function graph is a value obtained by adding the second parameter value to a value obtained by multiplying the second coefficient value and the temperature at which the optical compensation is performed.

18 . The display apparatus according to claim 11 , wherein the temperature at which optical compensation is performed and the first temperature are room temperature, and

the second temperature is a temperature higher than the first temperature.

19 . The display apparatus according to claim 18 , wherein the temperature at which the optical compensation is performed, the first temperature, and the second temperature are obtained by sensing a temperature inside the display panel.

20 . The display apparatus according to claim 11 , wherein the light-emitting elements in the pixels include micro LEDs.

21 . The display apparatus according to claim 20 , wherein the micro LEDs have a vertical structure.