KR101996359B1 - Device and method for controlling temperature of wireless terminal - Google Patents

Abstract

A temperature control apparatus for a portable terminal includes a memory for storing set temperature and release temperature data for controlling overheating of a terminal, a temperature sensing unit for sensing an internal heat temperature of the terminal, modules having a heat source, The output of the temperature sensing unit is compared with the set temperature to determine whether or not overheating occurs, and the modules are controlled to be in a heat restriction mode upon overheating. In the heat generation limiting mode, And releasing the heat limitation mode when the power supply is released, and transiting to the normal operation mode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a temperature control device,

The present invention relates to an operation control method for a portable terminal, and more particularly, to an apparatus and a method for controlling an operation of the portable terminal according to a heat generation temperature of the portable terminal.

The mobile terminal is progressing to be able to simultaneously process various functions such as communication and multimedia. The portable terminal is becoming thinner in order to improve portability. In order to perform various functions, the number of processors and the maximum clock of the portable terminal are increased, the LCD is enlarged, and a brighter picture is required. In order to perform a variety of functions, As the charge is requested, the causes of heat generation are increasing due to the increase of the charging current and the mounting of the camera module in the high-pixel area.

Accordingly, it is impossible to prevent the heat generation of the terminal by turning off the power to control the heat generation of the component at the maximum temperature at which each component can operate. As heat generated from various modules causing heat generation increases It is not possible to prevent overheating due to heat generated by other modules simply by controlling the clock using the temperature sensor inside the processor.

The present invention proposes an apparatus and method for controlling the operation of a module which detects the internal temperature of the terminal and causes a cause of heat generation, in order to effectively control the heat generated in the portable terminal.

In an embodiment of the present invention, a sensor capable of sensing a temperature inside a mobile terminal is disposed around a heat source in a portable terminal to detect a heat generation state caused by a processor and other components, .

The temperature controller of the portable terminal according to the embodiment of the present invention may include a memory for storing set temperature and release temperature data for controlling overheating of the terminal, a temperature sensing unit for sensing an internal heat generation temperature of the terminal, And an output of the temperature sensing unit is compared with the set temperature to determine whether or not the module is overheated in a normal operation mode, And a control unit for releasing the heat limiting mode upon releasing and transitioning to a normal operation mode.

A method of controlling a temperature of a portable terminal according to an exemplary embodiment of the present invention includes a memory for storing set temperature and release temperature data for controlling overheating of a terminal, a temperature sensing unit for sensing an internal heat temperature of the terminal, The method comprising the steps of: sensing an internal heat generation temperature of the terminal in a normal operation mode and comparing the sensed temperature with the set temperature to determine whether the module is overheated; Determining whether the output of the temperature sensing unit is to be released by comparing the output of the temperature sensing unit with the releasing temperature in the heat limiting mode, releasing the heat limiting mode at the time of releasing, and transiting to a normal operation mode. do.

According to another aspect of the present invention, there is provided a temperature control apparatus for a portable terminal, comprising: a memory for storing set temperature and release temperature data for controlling overheating of a terminal; modules having a heat source; And a control unit for controlling the temperature detection unit to compare the output of the temperature sensing units with the set temperature in the normal operation mode to determine whether or not the temperature is overheated, The output of the module is compared with the release temperature to determine whether or not to release the module, and upon release, releasing the heat restriction mode of the module and transitioning to the normal operation mode.

According to another aspect of the present invention, there is provided a method of controlling a temperature of a mobile terminal, the method comprising: storing a set temperature and a release temperature data for controlling overheating of the mobile terminal; modules having a heat source; A method of controlling an internal combustion engine, the method comprising the steps of: comparing the output of the temperature sensing units with the set temperature in a normal operation mode to determine whether the internal combustion engine is overheated; Comparing the output of the temperature sensing unit of the module with the release temperature to determine whether to release the module; releasing the heat restriction mode of the module when the module is released; and transitioning to a normal operation mode.

Since a module causing heat generation in the portable terminal is various, a sensor (for example, a thermistor) capable of sensing the temperature inside the terminal is disposed around the heat source to check the temperature, It is possible to control the temperature of the terminal to be controlled so that the temperature of the terminal can be controlled not to increase the temperature of the component by controlling the operation of the component that causes the heat generation, thereby preventing inconvenience in use due to overheating, There is an advantage to be able to. That is, it is possible to prevent the temperature of the surface of the terminal from being overheated by controlling the operation of the LCD, the camera, and the charger which are the heat sources including the processor in the portable terminal.

1 is a view showing a configuration of a mobile terminal according to a first embodiment of the present invention;
2 is a flowchart illustrating a procedure of controlling a temperature of a heat generation of a terminal according to an embodiment of the present invention.
3 is a flowchart illustrating a procedure for determining whether or not the terminal is in a heat restriction mode by analyzing an internal heat generation temperature according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a procedure of selectively controlling the modules of the heat source and decreasing the internal temperature when the internal heat generation temperature is raised according to the embodiment of the present invention
5 is a diagram showing a configuration of a portable terminal according to a second embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as possible whenever possible.

In the following description, specific details such as the surface temperature of the portable terminal, the converted temperature of the sensor, and the set time for overheating are shown. However, the present invention is provided for better understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be embodied in other forms without departing from the spirit and scope of the invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the present invention, a temperature sensing unit is built in a terminal to detect a temperature inside the device in real time, and a temperature controller (Intelligent Overheating Protection controller) for controlling the heat generating module using the temperature information is controlled to prevent the terminal from overheating . The temperature control unit may be included in the control unit of the portable terminal or independently of the terminal control unit. The embodiment of the present invention will be described on the assumption that the controller of the terminal performs a temperature control function. The cause of heat generation of the portable terminal may be overload of the display unit, the charging unit, the camera, and the control unit. In this case, the controller controls the operation of each module such as a processor, an LCD, a charger, and a camera so that the temperature of the terminal does not rise above a certain level based on the temperature sensed by the temperature sensing unit.

In the heating month of the terminal, there is a possibility that the heating of the controller by the application operation which uses the controller excessively, the heating of the charging module due to the high charging current during charging, Heat generated by a display unit that continuously displays a large amount of display data by application execution such as a game, and the like. In addition, due to the above-described heat sources, heat energy is accumulated inside the terminal, and the surface temperature of the terminal is increased due to such heat energy. In order to prevent the deterioration of the usability due to the increase of the surface temperature of the terminal, it is necessary to check the relationship between the surface temperature of the terminal (for example, a thermistor) and the terminal and to maintain the surface temperature Tw And analyzes the temperature sensed by the temperature sensing unit to control the operation of the devices as a heat source.

To this end, in the embodiment of the present invention, the surface temperature Tw that can prevent the low-temperature image is set, and the thermistor temperature corresponding thereto is secured through experiments. The controller senses the internal temperature of the terminal through the temperature sensing unit while the terminal is operating, and the controller monitors whether the temperature of the temperature sensing unit rises above the temperature obtained by the experiment. At this time, if the internal temperature rise of the terminal is detected, the controller controls the operation of the heating module of the terminal. Here, the heat generating module will be described as a control unit, a display unit, a camera, a charger, etc. However, other modules having a cause of heat generation are also possible.

In the embodiment of the present invention, if it is determined that the internal temperature of the terminal has risen, the heat generation module of the terminal can be controlled as follows. First, the control unit limits the maximum brightness (luminance) (brightness) of the display unit (LCD) and the transmission period of display data transmitted to the display unit. Secondly, lower the charge current of the charger (the current level that can be maintained below the terminal side area Tw). For example, when the surface temperature is maintained at 45 degrees (55 degrees in terms of the thermistor) for 30 minutes, the charge current is lowered. If the battery charge falls below the minimum battery charge rate (for example, 20% (For example, 25%), the charge current of the battery can be regulated again (the temperature, the time, and the battery charge amount may be appropriately adjusted according to the experiment or need) you can change it). Third, you can limit the camera's frame rate and resolution (maintain the level below the external surface Tw of the camera). Fourth, it is possible to limit the clock of the controller (Processor Max Clock) (clock capable of keeping the front and rear surface Tw below the processor located). The limitation level of each of the heat generating modules as described above can be set through experiments.

1 is a diagram illustrating a configuration of a mobile terminal according to a first embodiment of the present invention.

1, the communication unit 120 performs a wireless communication function with a base station or another device. The communication unit 120 may include a transmitter for performing a frequency upconverter and a power amplification on a frequency of a transmission signal and a receiver for performing a low noise amplification and a frequency down coverter on a reception signal. The communication unit 120 may include a modulation unit and a demodulation unit. The modulator modulates the transmission signal and transmits the modulated signal to the transmission unit, and the demodulation unit demodulates the signal received through the reception unit. In this case, the modulation and demodulation unit may be LTE, WCDMA, GSM, WIFI, WIBRO, NFC, Bluetooth, or the like.

The controller 100 controls the overall operation of the terminal and performs a temperature control function according to an embodiment of the present invention.

The memory 110 may include a program memory for storing an operation program of a terminal and a program according to an embodiment of the present invention, tables for operation of the terminal, and a data memory for storing data generated during program execution. In particular, the memory 110 may include a table for setting a temperature for determining overheating and / or a holding time of the temperature according to an embodiment of the present invention.

The temperature sensing unit 130 senses the internal temperature of the terminal and outputs the sensed temperature to the controller 100. Here, the temperature sensing unit 130 may be a thermistor. The temperature sensing unit 130 may be installed at a position where the heat generation is highest in the portable terminal, which can be determined experimentally. The temperature sensing unit 130 may be mounted at a position close to the control unit 100.

The camera 140 obtains image data at a predetermined frame rate and resolution under the control of the controller 100 in a camera driving mode. For example, the camera 140 acquires images of 30 frames per second (30 frames per second) and 1080p resolution in the normal operation mode under the control of the controller 100, and acquires images of 15fps and 720p resolution in the heat limitation mode.

The display unit 150 displays the data of the transmission rate set under the control of the controller 100 at the set brightness. For example, the display unit 150 displays the display data transmitted at the UI rendering rate of 60 Hz transmitted from the controller 100 in the normal operation mode under the control of the controller 100 with brightness of 300 cd (candela) 100, the display data transmitted at the UI rendering rate of 30 Hz is displayed with the brightness of 230 cd.

The charging unit 160 charges a battery (not shown) under the control of the controller 100 with the charging current set in the charging mode. For example, under the control of the controller 100, the battery is charged with the charging current of 1A in the normal operation mode, and the battery is charged with the charging current of 450 mA in the heat limiting mode. That is, the charging unit 160 lowers the charge current of the battery in the heat generation limiting mode under the control of the controller 10 (1A -> 450 mA). At this time, if the charged amount of the battery drops below the minimum charging rate (for example, 20%) even in the heating limitation mode, the control unit 100 increases the charging current again so that the terminal can operate normally, The charge current can be regulated again (1A - > 450mA) when the charge amount of the battery is again charged to a minimum charge rate (for example, 25%).

Also, the controller 100 determines a normal operation mode or a heat generation restriction mode according to the sensed temperature of the temperature sensing unit 130, and controls the operation of the camera 140, the display unit 150, and the charger 160 as described above do. At this time, the internal heat generation can also be caused by the overload of the control unit 100. That is, when a high load application such as a game is performed or a plurality of applications are simultaneously executed, the controller 100 increases the internal heat generation temperature by the overload. In this case, the controller 100 lowers the system clock to the set system clock. For example, the controller 100 can use up to a maximum system clock (for example, 1.4 GHz) in a normal operation mode, but can use up to a set clock (for example, 500 MHz) in the heat generation limiting mode.

In the portable terminal according to the embodiment of the present invention, the surface temperature of the portable terminal may be different from the internal heating temperature sensed by the temperature sensing unit 130. Accordingly, it is possible to experimentally measure the surface temperature of the portable terminal and the internal temperature sensed by the temperature sensing unit 130, which can be felt by the user, and set the temperature for determining the internal heat generation state. Here, when the temperature sensing unit 130 is installed at a position close to the control unit 100, temperature results as shown in Table 1 below can be obtained. In Table 1, the surface temperature represents the surface temperature of the terminal, and the sensed temperature may be a temperature corresponding to the surface temperature sensed inside the portable terminal.

Surface temperature 43 45 48 50 Sensing temperature 51 54 59 61

At this time, the sensing temperature for determining the overheated state of the portable terminal can be determined by various methods. That is, the temperature for determining the heating state can be set only by the pure sensing temperature, and the sensing temperature and the time for which the sensing temperature is maintained can be set in combination. For example, in the case of the former, when the sensing temperature is detected as 61 degrees (surface temperature 50 degrees), the control unit 100 can operate the terminal in the heat generation restriction mode. In the case of the temperature shown in Table 1, it is possible to set the limiting temperature Tw for operating the sensing temperature and the holding time to operate in the heat generation limiting mode. For example, the limiting temperature Tw can be set as shown in Table 2 below, which can be stored in the memory 110 as a table.

Detection temperature (Tt) 51 54 59 61 Retention time 4 hours 30 minutes 5 minutes Immediately

In Table 2, the sensing temperature Tt is an internal heating temperature sensed by the temperature sensing unit 130. If the sensing time Tt is maintained for the corresponding holding time in Table 2, 100 is set to the set temperature Tw and the heat generation limiting mode can be operated. In this case, the controller 100 may count the holding time using an internal timer. In this case, the controller 100 changes the holding time to the corresponding time to detect the temperature and the time, when the sensed temperature Tt is changed. , A charger 160, and a controller 100. In this case, it is assumed that the operation in the normal operation mode and the heat generation restriction mode is as shown in Table 3 below.

Normal operation mode Heat limit mode Camera's transfer rate / resolution 30fcs / 1080p 15fcs / 720p Data reception ratio / brightness of display 60Hz / 300cd 30Hz / 230cd Charging current of charger 1A 450mA The system clock of the control unit 1.4GHz 500MHz

Accordingly, in the case of Table 3, the camera 140 acquires 30 frames of 1080 pixels per second in the normal operation mode, and 15 frames of 720 pixels per second in the heat limiting mode, . Also, the display unit 150 receives the frame data stored in the internal buffer of the control unit 100 at a cycle of 60 Hz in the normal operation mode and displays the frame data at a brightness of 300 cd, while the control unit 100 displays the frame data at the brightness of 300 cd. The frame data stored in the internal buffer is received and displayed at a brightness of 230 cd to reduce the heat generated by the display unit 150. In addition, the battery charger 160 charges the battery at a charging current of 1A in the normal operation mode, and the battery is charged at 450 mA in the heat generation limiting mode, thereby reducing heat generation in the charging mode. In addition, the controller 100 can use a system clock of a maximum of 1.4 GHz in a normal operation mode, and a system clock of a maximum of 500 MHz can be used in a heat limitation mode, thereby reducing the heat generation of the controller 100 when the system is overloaded. And the release temperature Ts for releasing the heat generation restriction mode are required. The release temperature Ts may be determined to be a specific sensed temperature, and may be determined to be a temperature at which the gaseous sensing temperature Tt is lowered to a predetermined temperature or lower in a state of performing the heat limiting mode. For example, in the former case, the release temperature Ts can be set to 50 degrees or 51 degrees. In the latter case, when the set temperature Tw is determined as shown in Table 2, it is assumed that a lower invention temperature is detected at the current sensed temperature Tt. For example, if the sensing temperature Tt is lowered from 59 degrees to 59 degrees, 59 degrees to 54 degrees, 54 degrees to 51 degrees, 51 degrees, or 61 degrees to 54 degrees, 59 degrees to 51 degrees, or 51 degrees It may be determined as the release temperature Ts.

FIG. 2 is a flowchart illustrating a procedure of controlling a temperature of a heat of a terminal according to an embodiment of the present invention. Here, it is assumed that the module having the heat source is the control unit 100, the camera 140, the display unit 150, and the charging unit 160, and the operation of the normal operation mode and the heat generation restriction mode is as shown in Table 3 below.

Referring to FIG. 2, in the normal operation mode of step 211, the controller 100 can use up to a maximum system clock. The camera 140 can acquire an image with a maximum resolution and a frame rate, and the display unit 150 transmits And the charging unit 160 can charge the battery with the maximum charging current in the charging mode. The controller 100, which performs the normal operation mode as described above, receives the internal heat temperature sensed through the temperature sensing unit 130 in step 213 and analyzes the internal heat temperature. In step 215, the controller 100 determines whether the sensed temperature Tt is greater than the preset temperature Tw, and determines whether the sensed temperature Tt is greater than the set temperature Tw. The temperature analysis process of steps 213 and 215 may be performed as shown in FIG.

3 is a flowchart illustrating a procedure for determining whether a terminal is in a heat restriction mode by analyzing an internal heat generation temperature according to an embodiment of the present invention.

Referring to FIG. 3, the controller 100 receives the output of the temperature sensing unit 130 at predetermined time intervals to analyze the internal heat generation temperature of the terminal. In step 311, the controller 100 senses the sensed set time and inputs the output of the temperature sensing unit 130 in step 313. Then, the controller 100 analyzes the sensed temperatures in steps 315 and 319. As shown in Table 2, when the set temperature Tw reaches the first set temperature Tw1, the set temperature Tw is immediately subjected to the heat limitation mode. When the set temperature Tw is reached, the second set temperature Tw2 If it is maintained, it executes the heat limitation mode. In the case of Table 2, the first set temperature Tw1 may be 61 degrees and the second set temperature Tw2 may be 59, 54, and 51 degrees, respectively, and the holding times may be 5 minutes, 30 minutes, and 4 hours have. Accordingly, when the first set temperature Tw1 is sensed, the controller 100 senses the first set temperature Tw1 in step 315, and proceeds to step 317 to transition to the heat restriction mode for temperature control.

However, if it is determined in step 319 that the second set temperature Tw2 is satisfied, the control unit 100 determines in step 321 whether the second set temperature Tw2 is maintained for a predetermined time in step 321. If the set temperature Tw2 is maintained for the set time, Otherwise, in step 323, the retention time is increased and then returned. That is, in the case of Table 2, if the second set temperature Tw2 is 59 degrees, the control unit 321 checks whether it is 5 minutes or not. If it is 5 minutes, If not, it returns to the state of FIG. 2 after increasing the holding time at step 321. If the second set temperature Tw2 is 54, it is inspected whether or not 30 minutes have elapsed. If 30 minutes have elapsed, the transition is made to the heat generation limiting mode. Otherwise, the retention time is increased and then return to FIG. 2 to perform a normal operation mode. When the set temperature Tw2 is 51 degrees, it is inspected whether or not 4 hours have elapsed. If the set temperature Tw2 is 51 degrees, the mode shifts to the heat limitation mode after 4 hours elapses. Otherwise, the retention time is increased and then the routine returns to FIG. However, if the sensed temperature Tt is lower than the second preset temperature Tw2, the routine returns to FIG. 2 to perform the normal operation mode.

In this case, if the internal heat generation temperature is increased (for example, increased from 54 degrees to 54 degrees, and increased from 59 degrees to 59 degrees) in the temperature analysis process, the temperature analysis procedure is changed again In the case of changing the temperature to 61 degrees, the mode immediately transits to the heat generation restriction mode regardless of the holding time. In addition, the temperature analysis procedure is performed by changing the internal temperature of the terminal to the maintenance time of the corresponding temperature (for example, from 61 degrees to 59 degrees, from 59 degrees to 54 degrees, and from 54 degrees to 51 degrees). Also, if the internal temperature is increased or decreased at this time, the following procedure may be performed after waiting for a certain elapsed time (for example, 30 seconds or 1 minute).

Accordingly, if the sensed temperature Tt is greater than the set temperature Tw in FIG. 2, the controller 100 senses the sensed temperature in step 215 and operates in the heat-limited mode to reduce the internal temperature of the terminal in step 217. FIG. At this time, in the heat limitation mode, as shown in Table 3, the frame rate and the number of pixels of the camera 140, the display data transmission and brightness of the display unit 150, the charging current of the charger 160 in the charging mode, Etc. to the value set in the heat generation limiting mode. In this case, the controller 100 checks the internal temperature of the terminal through the temperature sensing unit 130 in step 219, and then, in step 221, It is checked whether the sensed temperature Tt is smaller than the released temperature Ts.

Here, the release temperature Ts may be set to one set release temperature (for example, it may be 51 degrees in Table 2), and a plurality of release temperatures and set times may be used in a manner similar to the set temperature have. In the embodiment of the present invention, it is assumed that a single release temperature is used. Accordingly, if the sensed temperature Tt is higher than the release temperature Ts, the controller 110 returns to step 217 to perform all of the internal limits as described above. If the sensed temperature Tt is lower than the release temperature Ts, the controller 100 proceeds to step 211, . That is, when the internal heat generation temperature is lower than the release temperature Ts, the controller 100 controls the camera 140, the display unit 150, the charger 160, and the controller 100 to the values of the normal operation mode in Table 2.

2, the controller 100 controls the operation of all the modules having the internal heat source (here, the camera, the display unit, the charging unit, the control unit, etc.) when the set temperature Tw for performing the heat restriction mode is detected in the normal operation mode. However, if the internal temperature rises to the set temperature Tw during the normal operation mode, the controller 100 may use a method of selectively controlling the operation of corresponding modules by analyzing the cause of the heat generation.

4 is a flowchart illustrating a procedure for selectively controlling the modules of the heat source to lower the internal temperature when the internal heat generation temperature rises according to the embodiment of the present invention.

Referring to FIG. 4, the controller 100 performs a normal operation mode in step 411. In step 413 and step 415, the controller 100 senses the internal temperature of the terminal through the temperature sensor 130 as shown in FIG. 3, do. At this time, the method of analyzing the heating temperature may be performed according to the procedure shown in FIG. If the sensed temperature Tt is higher than the preset temperature Tw, the controller 100 analyzes the cause of the heat generation in step 417. [ That is, when the internal temperature of the terminal rises, the controller 100 analyzes the currently operating application to check the modules causing the internal temperature to rise, and operates the corresponding module in the heat restriction mode.

In this case, if the cause of the heat is the camera 140, the controller 100 operates the camera 140 in the heat restriction mode through steps 419 and 421. If the cause of the heat is the display unit 150, the controller 100 operates the display unit 150 in the heat restriction mode through steps 423 and 425. If the heating source is the charging unit 160, the controller 100 operates the charging unit 160 in the heating restriction mode through steps 427 and 429. If the cause of the heating is a system overload, the controller 100 operates the system clock of the controller 100 in the heat generation limiting mode through steps 431 and 433. Here, the operation of the camera 140, the display unit 150, the charging unit 160, and the system clock in the heat generation limiting mode may be set as shown in Table 3 below.

At this time, if there are a plurality of heat sources analyzed in step 417, the operation of corresponding modules can be controlled to the heat generation limiting mode. After the step 433 or 435, the controller 100 senses the internal temperature of the terminal through the temperature sensing unit 130 in step 435 and analyzes it. If the sensed temperature Tt is equal to or lower than the release temperature Ts in step 437 Inspect. At this time, if it is sensed that the sensed temperature Tt is equal to or lower than the release temperature Ts, the controller 100 cancels the heat generation restriction mode, and returns to step 411 to operate the terminal in the normal operation mode. Otherwise, And maintains the heat restriction mode operation of the terminal.

Further, in the embodiment of the present invention, the set temperature Tw is set to the first set temperature Tw1 and the second set temperature Tw, and the detected temperature Tt is set to the first set temperature Tw1 (for example, 61 degrees in Table 2) The control unit 100 operates all of the heating modules (camera, display unit, charging unit, system clock) in the terminal in the heat generation limiting mode, and when the sensed temperature Tt is lower than the first set temperature Tw1 and the second set temperature Tw2 (Any one of 51 degrees, 54 degrees, and 59 degrees in Table 2), it is possible to use a method of judging a module causing heat generation and operating the corresponding module in the heat generation restriction mode.

5 is a diagram illustrating a configuration of a mobile terminal according to a second embodiment of the present invention.

Referring to FIG. 5, the communication unit 120 performs a wireless communication function with a base station or another device. The communication unit 120 may have the same configuration and function as the communication unit of FIG.

The controller 100 controls the overall operation of the terminal and performs the temperature control function according to the second embodiment of the present invention.

The memory 110 may include a program memory for storing an operation program of a terminal and a program according to an embodiment of the present invention, tables for operation of the terminal, and a data memory for storing data generated during program execution. In particular, the memory 110 may include a table for setting a temperature for determining overheating and / or a holding time of the temperature according to an embodiment of the present invention.

The temperature sensing unit 105 may be mounted at a position adjacent to the controller 100 and senses an internal temperature of the controller 100 and the controller 100 to output the sensed temperature to the controller 100. The heat generation of the terminal can also be caused by the overload of the controller 100. That is, when a high load application such as a game is performed or a plurality of applications are simultaneously executed, the controller 100 increases the internal heat generation temperature by the overload. In this case, the temperature sensing unit 105 senses the heat of the control unit 100 and transmits the sensed heat to the control unit 100. The control unit 100 lowers the system clock to a set system clock at the time of overheating. For example, the controller 100 can use up to a maximum system clock (for example, 1.4 GHz) in the normal operation mode, but can use up to a set clock (for example, 500 MHz) in the heat limitation mode.

The camera 140 obtains image data at a predetermined frame rate and resolution under the control of the controller 100 in a camera driving mode. The temperature sensing unit 145 senses the temperature of the camera 140 and transmits the sensed temperature to the controller 100. The control unit 100 operates the camera 140 in a normal operation mode or a heat generation limited mode according to the temperature sensed by the temperature sensing unit 145. [ For example, the camera 140 acquires images of 30 fps (30 frame per second) and 1080p resolution in the normal operation mode under the control of the controller 100, and acquires images of 15 fps and 720p resolution in the heat limitation mode.

The display unit 150 displays the data of the transmission rate set under the control of the controller 100 at the set brightness. The temperature sensing unit 55 senses the temperature of the display unit 150 and transmits the sensed temperature to the controller 100. The control unit 100 operates the display unit 150 in a normal operation mode or a heat generation restriction mode according to the temperature sensed by the temperature sensing unit 155. For example, the display unit 150 displays the display data transmitted at the UI rendering rate of 60 Hz transmitted from the controller 100 in the normal operation mode under the control of the controller 100 with brightness of 300 cd (candela) 100, the display data transmitted at the UI rendering rate of 30 Hz is displayed with the brightness of 230 cd. The temperature sensing unit 165 senses the temperature of the charging unit 160 and transmits the sensed temperature to the controller 100. The control unit 100 operates the charging unit 160 in a normal operation mode or a heat generation restriction mode according to the temperature sensed by the temperature sensing unit 165. For example, the charging unit 160 charges a battery (not shown) with a charging current set in a charging mode under the control of the controller 100. [ For example, under the control of the controller 100, the battery is charged with the charging current of 1A in the normal operation mode, and the battery is charged with the charging current of 450 mA in the heat limiting mode. The charging unit 160 lowers the charging current of the battery in the heating restriction mode under the control of the controller 100 (1A-> 450mA), and when the charging amount of the battery is in the minimum heating ratio (for example, 20% ), The controller 100 increases the charging current again (450 mA to > 1A) so that the terminal can be normally operated. If the charging amount of the battery is again charged to the minimum charging rate (for example, 25% It can be regulated again (1A -> 450mA).

In addition, the controller 100 determines a normal operation mode or an exothermic restriction mode of modules corresponding to the sensed temperatures of the temperature sensing units 105, 145, 155, and 165, respectively. In order to reduce the internal heat generation in the exothermic restriction mode, The camera 140, the display unit 150, and / or the charger 160. [

5, the control unit 100 may control the overheating of the terminal by controlling the modules in the overheated state after measuring the heating temperatures of the respective modules of the terminal. In this case, the controller 100 may control the overheating state of the terminal by the procedure shown in FIG.

That is, the controller 100 performs a normal operation mode in step 411, and senses and analyzes temperatures of the modules through the temperature sensors 105, 145, and 155 in steps 413 and 415. And detects the temperature of the charging unit 160 through the temperature sensing unit 165 in the charging mode. At this time, the charging mode may be performed during the normal operation mode, and the charging mode may be performed only when the terminal is not operating. In the following description, it is assumed that the charging mode is also performed during the normal operation mode. At this time, when the sensed temperature Tt sensed by the temperature sensing units 105, 145, 155, and / or 165 is higher than the set temperature Tw, the controller 100 operates the corresponding module in the heat generation restriction mode.

If the cause of the heat is the camera 140, the controller 100 operates the camera 140 in the heat restriction mode. If the cause of the heat is the display unit 150, the controller 100 operates the display unit 150 in the heat restriction mode. The controller 100 operates the charging unit 160 in the heat generation limiting mode. If the cause of the heating is a system overload, the controller 100 operates the system clock in the heat generation limiting mode. Here, the operation of the camera 140, the display unit 150, the charging unit 160, and the system clock in the heat generation limiting mode may be set as shown in Table 3 below.

At this time, when there are a plurality of causes of the heat generation, the operation of the corresponding modules can be controlled to the heat generation limiting mode. When the terminal is overheated as described above, the controller 100 performs a heat restriction mode for each module that provides a cause of heat generation. The controller 100 senses the temperature of the corresponding module through the temperature sensing unit of the module operating in the heat limiting mode and analyzes the sensed temperature Tt of the module, Check if it is lowered. At this time, if it is sensed that the sensed temperature Tt of the module operating in the heat limitation mode is equal to or lower than the release temperature Ts, the controller 100 cancels the heat limitation mode of the module and operates the module in the normal operation mode, The control unit 100 maintains the heat restriction mode operation of the corresponding module.

The embodiments of the present invention disclosed in the present specification and drawings are merely illustrative of specific embodiments of the present invention and are not intended to limit the scope of the present invention in order to facilitate understanding of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims (13)

In a portable terminal,
A memory for storing data relating to at least one set temperature and a release temperature;
A temperature sensing unit for sensing a temperature of the portable terminal,
At least one module including a display portion for emitting heat,
And a control unit,
Wherein,
Comparing the detected temperature with the at least one set temperature in the normal operation mode,
And changing the mode of the at least one module from the normal operation mode to the heat restriction mode when the temperature sensed by the temperature sensing unit is greater than the at least one set temperature,
Wherein in the heat generation limiting mode, the temperature sensed by the temperature sensing unit is compared with the release temperature,
Control to change the mode of the at least one module from the heat limitation mode to the normal operation mode when the temperature sensed by the temperature sensing unit is lower than the release temperature,
Wherein the maximum brightness of the display unit is set to a first maximum brightness in the normal operation mode, a second maximum brightness in the heat generation limited mode,
Wherein the second maximum brightness is lower than the first maximum brightness,
Wherein the at least one set temperature is higher than the release temperature,
Wherein the set temperature includes a first set temperature and a second set temperature lower than the first set temperature,
The control unit, in a normal operation mode,
When the temperature sensed by the temperature sensing unit is higher than the first set temperature, performing the heat limitation mode; and
And controls the heat generation limiting mode to be performed when the temperature sensed by the temperature sensing unit is maintained for a predetermined time period that is lower than the first set temperature and higher than the second set temperature,
And the predetermined time is shortened corresponding to the increase in the sensed temperature below the first set temperature when the temperature sensed by the temperature sensing unit is less than the first set temperature and the second set temperature or more. .
The method according to claim 1,
Wherein the at least one module comprises a camera,
Wherein the control unit controls the video frame rate and resolution of the camera to be lowered to a preset value in the heat generation limiting mode.
The method according to claim 1,
The display unit may include a liquid crystal display (LCD) or a light emitting diode (LED)
Wherein the control unit controls the frame rate of the display data transmitted to the display unit to be lowered in the heat generation limiting mode.
The method according to claim 1,
Wherein the at least one module comprises the control,
Wherein the control unit controls the system clock of the control unit to be lowered to a predetermined clock in the heat generation limiting mode.
5. The method of claim 4,
Wherein the at least one module comprises a live part,
Wherein the control unit controls the charging current amount in the charging mode of the charging unit to be lowered in the heat generation limiting mode.
5. The method of claim 4,
Wherein the control unit controls the transfer rate of the display data transmitted to the display unit to be halved in the heat generation limiting mode.
The method according to claim 1,
Wherein the at least one module is at least one of a camera,
Wherein the control unit controls the image frame rate and the resolution of the camera to be lowered to a predetermined value in the heat generation limiting mode and controls the brightness of the display data transmitted to the display unit to be lowered, And controls the system clock of the control unit to be lowered.
8. The method of claim 7,
Wherein the control unit controls the frame rate of the display data transmitted to the display unit to be lowered from 60 Hz to 30 Hz in the heat generation limiting mode.
9. The method of claim 8,
Wherein the control unit controls the image frame rate and the resolution of the camera to be halved in a heat limitation mode and the transmission rate of display data to be transmitted to the display unit is reduced to half.
The portable terminal includes a memory for storing data on at least one of a set temperature and a release temperature, a temperature sensing unit for sensing a temperature of the portable terminal, and a display unit for emitting heat The method comprising the steps < RTI ID = 0.0 > of:
Comparing the detected temperature with the at least one set temperature in the normal operation mode,
Changing the mode of the at least one module from the normal operation mode to the heat restriction mode when the temperature sensed by the temperature sensing unit is greater than the at least one set temperature;
An operation of comparing the temperature sensed by the temperature sensing unit and the release temperature in the heat generation limiting mode,
And changing the mode of the at least one module from the heat limitation mode to the normal operation mode when the temperature sensed by the temperature sensing unit is lower than the release temperature,
Wherein the maximum brightness of the display unit is set to a first maximum brightness in the normal operation mode, a second maximum brightness in the heat generation limited mode,
Wherein the second maximum brightness is lower than the first maximum brightness,
Wherein the at least one set temperature is higher than the release temperature,
Wherein the at least one module comprises a camera, a charging unit and a control unit,
The method may further include lowering the video frame rate and resolution of the camera to a predetermined value in the heat generation limiting mode and lowering the charging current amount in the charging mode of the charging unit And an operation of lowering the system clock of the control unit to a predetermined clock in the heat limitation mode,
Wherein the set temperature includes a first set temperature and a second set temperature lower than the first set temperature,
The method may further include: performing the heat limitation mode when the temperature sensed by the temperature sensor is higher than the first set temperature;
And performing the heat restriction mode when the temperature sensed by the temperature sensor is maintained below the first set temperature and the second set temperature or above for a predetermined time,
And the predetermined time is shortened corresponding to the increase in the sensed temperature below the first set temperature when the temperature sensed by the temperature sensing unit is less than the first set temperature and the second set temperature or more. Lt; / RTI >
In a portable terminal,
A memory for storing data relating to at least one set temperature and a release temperature;
At least one module including a display portion for emitting heat,
At least one temperature sensing unit installed near the at least one module,
And a control unit,
Wherein,
Comparing the output of the at least one temperature sensing section with the at least one set temperature to change the mode of the at least one module from the normal operation mode to the heat limitation mode,
Setting a maximum brightness in the heat generation limited mode of the display unit corresponding to the mode of the at least one module,
Comparing the output of the at least one temperature sensing section with the release temperature to change the mode of the at least one module from the heat limitation mode to the normal operation mode,
Setting a maximum brightness in the normal operation mode of the display unit corresponding to 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 operation mode, a second maximum brightness in the heat generation limited mode,
Wherein the second maximum brightness is lower than the first maximum brightness,
Wherein the at least one set temperature is higher than the release temperature,
Wherein the set temperature includes a first set temperature and a second set temperature lower than the first set temperature,
The control unit, in a normal operation mode,
Performing the heat limitation mode on the module corresponding to the arbitrary temperature sensing unit when the temperature sensed by the arbitrary temperature sensing unit of the at least one temperature sensing unit is higher than the first set temperature,
When a temperature sensed by an arbitrary temperature sensing unit of the at least one temperature sensing unit is maintained at a temperature lower than the first predetermined temperature and a predetermined temperature or higher than the second predetermined temperature, To perform the above-described heat limitation mode,
And the predetermined time is shortened corresponding to the increase in the sensed temperature below the first set temperature when the temperature sensed by the temperature sensing unit is less than the first set temperature and the second set temperature or more. .
12. The method of claim 11,
Wherein the at least one module is at least one of a camera, a charging unit, and a control unit,
Wherein the at least one temperature sensing portion is installed close to each of the at least one module,
Wherein the control unit lowers a video frame rate and a resolution of the camera to a predetermined value in the heat generation limiting mode and decreases a charging current amount in the charging mode of the charging unit in the heating limiting mode, And controls the system clock of the control unit to be lowered to a predetermined clock in the limiting mode.
A method of controlling a temperature of a portable terminal, the method comprising: a memory for storing data relating to at least one set temperature and a release temperature; at least one module including a display for emitting heat; and at least one The method comprising the steps of:
Comparing the output of the at least one temperature sensing section to the at least one set temperature to change the mode of the at least one module from a normal operation mode to a heat limitation mode,
Setting a maximum brightness in the heat generation limited mode of the display unit corresponding to the mode of the at least one module;
Comparing the output of the at least one temperature sensing section with the release temperature to change the mode of the at least one module from the heat limitation mode to the normal operation mode;
And setting a maximum brightness in the normal operation mode of the display unit corresponding to 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 operation mode, a second maximum brightness in the heat generation limited mode,
Wherein the second maximum brightness is lower than the first maximum brightness,
Wherein the at least one set temperature is higher than the release temperature,
Wherein the set temperature includes a first set temperature and a second set temperature lower than the first set temperature,
The method may further include the step of, when the temperature sensed by an arbitrary temperature sensing unit of the at least one temperature sensing unit is higher than the first set temperature, performing the heat limiting mode on the module corresponding to the arbitrary temperature sensing unit Operation, and
When a temperature sensed by an arbitrary temperature sensing unit of the at least one temperature sensing unit is maintained at a temperature lower than the first predetermined temperature and a predetermined temperature or higher than the second predetermined temperature, And performing the heat limitation mode for the heat generation mode,
And the predetermined time is shortened corresponding to the increase in the sensed temperature below the first set temperature when the temperature sensed by the temperature sensing unit is less than the first set temperature and the second set temperature or more. Lt; / RTI >

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