System and method for controlling temperature in mobile device

1. A mobile device, the device comprising:

a memory configured to store at least one set temperature value and a release temperature value;

a temperature sensor configured to detect a temperature of the mobile device;

at least one module comprising a display unit that emits heat; and

a controller,

wherein the controller is configured:

to compare the detected temperature of the temperature sensor with the at least one set temperature value in a normal mode of the at least one module,

to change, if the detected temperature is greater than the at least one set temperature value, a mode of the at least one module from the normal mode to a heat generation suppressing mode,

to compare the detected temperature of the temperature sensor with the release temperature value in the heat generation suppressing mode of the at least one module, and

to change, if the detected temperature is lower than the release temperature value, the mode of the at least one module from the heat generation suppressing mode to the normal mode,

wherein a maximum brightness of the display unit is set to a first maximum brightness in the normal mode, and the maximum brightness of the display unit is set to a second maximum brightness in the heat generation suppressing mode,

wherein the second maximum brightness is lower than the first maximum brightness, and

wherein the at least one set temperature value is higher than the release temperature value.

2. The device of claim 1 ,

wherein the at least one module further comprises a camera, and

wherein the controller reduces a video frame rate and a resolution of the camera to preset values in the heat generation suppressing mode.

3. The device of claim 1 ,

wherein the display unit comprises a Liquid Crystal Display or a Light Emitting Diode Display, and

wherein the controller reduces a frame rate of screen display data transmitted to the display unit in the heat generation suppressing mode.

4. The device of claim 1 ,

wherein the at least one module further comprises the controller, and

wherein the controller reduces a clock rate of the controller to a preset clock rate in the heat generation suppressing mode.

5. The device of claim 4 ,

wherein the at least one module further comprises a charging unit, and

wherein the controller controls the charging unit to reduce an amount of charging current in a charging mode in the heat generation suppressing mode.

6. The device of claim 4 , wherein a transfer rate of screen data transmitted to the display unit is reduced by half in the heat generation suppressing mode.

7. The device of claim 1 ,

wherein the memory stores a first set temperature value and a second set temperature value, the second set temperature value being less than the first set temperature value, and a retention time for maintaining the second set temperature value, and

wherein the controller changes to the heat generation suppressing mode if the detected temperature is greater than the first set temperature value in the normal mode, and changes to, if the detected temperature is greater than the second set temperature value, the heat generation suppressing mode during the retention time.

8. The device of claim 7 ,

wherein the at least one module further comprises at least one of a camera, a charging unit, and the controller, and

wherein the controller reduces at least one of a video frame rate and a resolution of the camera to preset values in the heat generation suppressing mode, a level of brightness for screen data transmitted to the display unit in the heat generation suppressing mode, an amount of charging current of the charging unit in the heat generation suppressing mode, and a clock rate of the controller in the heat generation suppressing mode.

9. The device of claim 8 , wherein the controller reduces a frame rate of screen data transmitted to the display unit from 60 Hz to 30 Hz in the heat generation suppressing mode.

10. The device of claim 9 ,

wherein the video frame rate and the resolution of the camera are reduced by half in the heat generation suppressing mode, and

wherein a transfer rate of screen data transmitted to the display unit is reduced by half in the heat generation suppressing mode.

11. A method for controlling temperature in a mobile device that includes a memory configured to store at least one set temperature value and a release temperature value, a temperature sensor configured to detect a temperature of the mobile device, and at least one module comprising a display unit that emits heat, the method comprising:

detecting, by the temperature sensor, the temperature of the mobile device in a normal mode of the at least one module;

comparing the detected temperature with the at least one set temperature value;

changing, if the detected temperature is greater than the at least one set temperature value, a mode of the at least one module from the normal mode to a heat generation suppressing mode;

comparing the detected temperature of the temperature sensor with the release temperature value in the heat generation suppressing mode of the at least one module; and

changing, if the detected temperature is lower than the release temperature value, the mode of the at least one module from the heat generation suppressing mode to the normal mode,

wherein a maximum brightness of the display unit is set to a first maximum brightness in the normal mode, and the maximum brightness of the display unit is set to a second maximum brightness in the heat generation suppressing mode,

wherein the second maximum brightness is lower than the first maximum brightness, and

wherein the at least one set temperature value is higher than the release temperature value.

12. The method of claim 11 ,

wherein the at least one module further comprises a camera, a charging unit, and a controller, and

further comprising at least one of:

reducing a video frame rate and a resolution of the camera to preset values in the heat generation suppressing mode;

reducing a charging current of the charging unit in the heat generation suppressing mode; and

reducing a clock rate of the controller in the heat generation suppressing mode.

13. The method of claim 12 , further comprising:

reducing a frame rate of screen display data transmitted to the display unit in the heat generation suppressing mode.

14. The method of claim 13 ,

wherein the memory stores a first set temperature value and a second set temperature value, the second set temperature value being less than the first set temperature value, and a retention time for maintaining the second set temperature value,

wherein changing to the heat generation suppressing mode if the detected temperature is greater than the first set temperature value in the normal mode; and

wherein changing to the heat generation suppressing mode if the detected temperature is greater than the second set temperature value during the retention time.

15. A device for controlling temperature in a mobile device, the device comprising:

a memory configured to store at least one set temperature value and a release temperature value;

at least one module that emits heat comprising a display unit;

at least one temperature sensor installed near the at least one module; and

a controller,

wherein the controller is configured:

to compare an output of the at least one temperature sensor with the at least one set temperature value in order to change a mode of the at least one module from a normal mode to a heat generation suppressing mode, and

to set a maximum brightness of the display unit in the heat generation suppressing mode according the mode of the at least one module,

to compare the output of the at least one temperature sensor with the release temperature value in order to change the mode of the at least one module from the heat generation suppressing mode to the normal mode, and

to set, a maximum brightness of the display unit in the normal mode according the mode of the at least one module,

wherein the maximum brightness of the display unit is set to a first maximum brightness in the normal mode, and the maximum brightness of the display unit is set to a second maximum brightness in the heat generation suppressing mode,

wherein the second maximum brightness is lower than the first maximum brightness, and

wherein the at least one set temperature value is higher than the release temperature value.

16. The device of claim 15 ,

wherein the at least one module further comprises at least one of a camera, a charging unit, and the controller,

wherein the at least one temperature sensor comprises a plurality of temperature sensors installed near the at least one module, respectively, and

wherein the controller is configured to control at least one of:

the camera to reduce a video frame rate and a resolution of the camera to preset values in the heat generation suppressing mode,

the charging unit to reduce an amount of charging current for a battery in the heat generation suppressing mode, and

the controller to reduce a clock rate in the heat generation suppressing mode.

17. A method for controlling temperature in a mobile device that includes a memory for storing at least one set temperature value and a release temperature value, at least one module comprising a display unit that emits heat, and at least one temperature sensor installed near the at least one module, the method comprising:

comparing an output of the at least one temperature sensor with the at least one set temperature value in order to change a mode of the at least one module between a normal mode and a heat generation suppressing mode; and

setting a maximum brightness of the display unit according the mode of the at least one module,

comparing the detected temperature of the temperature sensor with the release temperature value in the heat generation suppressing mode of the at least one module; and

changing, if the detected temperature is lower than the release temperature value, the mode of the at least one module from the heat generation suppressing mode to the normal mode,

wherein the maximum brightness of the display unit is set to a first maximum brightness in the normal mode, and the maximum brightness of the display unit is set to a second maximum brightness in the heat generation suppressing mode,

wherein the second maximum brightness is lower than the first maximum brightness, and

wherein the at least one set temperature value is higher than the release temperature value.

18. A mobile device, the device comprising:

a memory configured to store at least one set temperature value and a release temperature value;

a temperature sensor configured to detect a temperature of the mobile device;

a display unit that emits heat; and

a controller,

wherein the controller is configured:

to compare the detected temperature of the temperature sensor with the at least one set temperature value in a normal mode of the display unit,

to change, if the detected temperature is greater than the at least one set temperature value, a mode of the display unit from the normal mode to a heat generation suppressing mode,

to compare the detected temperature of the temperature sensor with the release temperature value in the heat generation suppressing mode of the at least one module, and

to change, if the detected temperature is lower than the release temperature value, the mode of the display unit from the heat generation suppressing mode to the normal mode,

wherein a maximum brightness of the display unit is set to a first maximum brightness in the normal mode, and the maximum brightness of the display unit is set to a second maximum brightness in the heat generation suppressing mode,

wherein the second maximum brightness is lower than the first maximum brightness, and

wherein the at least one set temperature value is higher than the release temperature value.

19. The device of claim 18 , wherein the controller is configured to compare the detected temperature of the temperature sensor with a release temperature value in the heat generation suppressing mode, and to change to the normal mode if the heat generation suppressing mode is released according to a result of the comparison.

20. The device of claim 19 , wherein the display unit comprises a Liquid Crystal Display or Light Emitting Diode Display.