Display device and multi display device

1. A display device comprising:

a plurality of display units;

a plurality of unit temperature sensors respectively connected to the plurality of display units and configured to respectively sense temperatures of the plurality of display units; and

a control unit configured to:

set a highest temperature of the sensed temperatures of the plurality of display units as a device representative temperature, and

adjust a brightness of all of the plurality of display units in accordance with the device representative temperature,

wherein the control unit is further configured to:

adjust the brightness of all of the plurality of display units based on a temperature-brightness table,

wherein the temperature-brightness table includes combinations of a plurality of reference temperatures and a plurality of reference brightnesses,

wherein the plurality of reference temperatures are divided into a first temperature range and a second temperature range, and

wherein the reference brightnesses of the first temperature range are set to constant and the reference brightnesses of the second temperature range are gradually decreased, as the temperature belonging to the second temperature range increases.

2. The display device of claim 1 , wherein the control unit is further configured to:

extract a target brightness corresponding to the device representative temperature from the temperature-brightness table, and

adjust the brightness of each of the plurality of display units in accordance with the target brightness.

3. The display device of claim 2 , wherein the control unit is further configured to:

set a brightness between a first reference brightness corresponding to a first reference temperature and a second reference brightness corresponding to a second reference temperature as the target brightness, when the device representative temperature is between the first reference temperature and the second reference temperature, and

wherein the first and second temperatures are neighboring reference temperatures among the plurality of reference temperatures.

4. A multi display device comprising:

a first display device including:

a first group of display units;

a first group of unit temperature sensors respectively connected to the first group of display units and configured to sense temperatures of the first group of display units; and

a first control unit configured to:

extract a first representative temperature from the temperatures of the first group of display units; and

adjust a brightness of all of the first group of display units in accordance with the first representative temperature; and

a second display device including:

a second group of display units;

a second group of unit temperature sensors respectively connected to the second group of display units and configured to sense temperatures of the second group of display units; and

a second control unit configured to:

extract a second representative temperature from the temperatures of the second group of display units; and

adjust a brightness of all of the second group of display units in accordance with the second representative temperature,

wherein the first control unit is connected to the second control unit,

wherein the first and second control units are further configured to:

set a brightness corresponding to a higher temperature among the first and second representative temperature as a target brightness, and

adjust the brightness of the first and second groups of display units in accordance with the target brightness,

wherein the first and second control units are further configured to adjust the brightness of each of the first and second groups of display units based on a temperature-brightness table,

wherein the temperature-brightness table includes combinations of a plurality of reference temperatures and a plurality of reference brightnesses,

wherein the plurality of reference temperatures are divided into a first temperature range and a second temperature range, and

wherein the reference brightnesses of the first temperature range are set to constant and the reference brightnesses of the second temperature range are gradually decreased, as the temperature belonging to the second temperature range increases.

5. The multi display device of claim 4 , wherein the first control unit is further configured to:

request the second control unit for the second representative temperature, and

extract a device representative temperature from the first and second representative temperatures, and

wherein the first and second control units are further configured to adjust the brightness of each of the first and second groups of display units in accordance with the device representative temperature.

6. The multi display device of claim 4 , wherein the first control unit is further configured to extract a target brightness corresponding to the device representative temperature from the temperature-brightness table, and

wherein the first and second control units are further configured to adjust the brightness of each of the first and second groups of display units in accordance with the target brightness.

7. The multi display device of claim 6 , wherein the first control unit is further configured to set a brightness between a first reference brightness corresponding to a first reference temperature and a second reference brightness corresponding to a second reference temperature as the target brightness, when the device representative temperature is between the first reference temperature and the second reference temperature, and

wherein the first and second temperatures are neighboring reference temperatures among the plurality of reference temperatures.

8. The multi display device of claim 7 , wherein the first control unit is further configured to extract the target brightness from the first and second reference brightnesses by using an interpolation method.

9. A method of controlling a display device including a plurality of display units, the method comprising

sensing, via a plurality of unit temperature sensors respectively connected to the plurality of display units, temperatures of the plurality of display units;

setting, via a control unit, a highest temperature of the sensed temperatures of the plurality of display units as a device representative temperature; and

adjusting, via the control unit, a brightness of all of the plurality of display units in accordance with the device representative temperature,

wherein the adjusting the brightness adjusts the brightness of all of the plurality of display units based on a temperature-brightness table,

wherein the temperature-brightness table includes combinations of a plurality of reference temperatures and a plurality of reference brightnesses,

wherein the plurality of reference temperatures are divided into a first temperature range and a second temperature range, and

wherein the reference brightnesses of the first temperature range are set to constant and the reference brightnesses of the second temperature range are gradually decreased, as the temperature belonging to the second temperature range increases.

10. The method of claim 9 , further comprising:

extracting, via the control unit, a target brightness corresponding to the device representative temperature from the temperature-brightness table; and

adjusting, via the control unit, the brightness of each of the plurality of display units in accordance with the target brightness.