KR101648451B1 - Operating method for outputting power consumption of broadcasting receiver and broadcasting receiver enabling of the method - Google Patents

Abstract

The present invention relates to a method of operating a broadcast receiver and a broadcast receiver employing the method. More particularly, the present invention relates to a method and apparatus for determining a duty ratio of a PWM signal for controlling an output of a light source included in a broadcast receiver, A power consumption display method of determining the power consumption using the determined duty ratio and providing the current power consumption to the user, and a broadcast receiver employing the method.

Power consumption indication, power saving mode, LED, PWM signal, duty ratio

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an operation method of a broadcast receiver for displaying power consumption, and a broadcast receiver employing the method. [0002]

The present invention relates to a method of operating a broadcast receiver and a broadcast receiver employing the method. More particularly, the present invention relates to a method and apparatus for determining a duty ratio of a PWM signal for controlling an output of a light source included in a broadcast receiver, A power consumption display method of determining the power consumption using the determined duty ratio and providing the current power consumption to the user, and a broadcast receiver employing the method.

In general, liquid crystal displays (LCDs) are used in various devices ranging from televisions, notebook computers, monitors for desktop computers, and mobile phones.

Since the LCD itself can not emit light, a light emitting device capable of illuminating the liquid crystal panel is required to display image information.

The light emitting device of the LCD is coupled to the back surface of the liquid crystal panel and is called a backlight unit. The backlight unit forms a uniform surface light source to provide a light source to the liquid crystal panel.

A typical backlight unit includes a light source, a light guide plate, a diffusion sheet, a prism, and a protective sheet. As the light source, a fluorescent lamp such as a mercury cold cathode fluorescent lamp or a light emitting diode, (LED) or the like may be used.

Meanwhile, in order to minimize waste of electric power in a broadcast receiver adopting such an LCD light emitting device, a power saving mode can be applied. In the broadcast receiver of the related art, even if the power consumption according to the power saving mode selection is variable, There is a problem that the user may feel inconvenience.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the related art, and it is an object of the present invention to provide a power consumption display method and a power consumption display method for improving user convenience by allowing a user to confirm a power saving effect, The need for the development of a broadcasting receiver employing the broadcasting receiver is urgently required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art and it is an object of the present invention to provide a method and an apparatus for operating a broadcast receiver that displays power consumption that can provide information on power consumption currently consumed by a user, And an object of the present invention is to provide a broadcast receiver employing the same.

The present invention also provides a method of operating a broadcast receiver that displays current power consumption according to a set mode to a user interface and displays power consumption for enhancing user convenience by allowing the user to confirm the amount of power consumption currently being consumed, The present invention also provides a broadcast receiver employing the method.

Also, in the present invention, when the power save mode is selected in the broadcast receiver, or when the video output mode is selected, information on the current power consumption is provided to the user so that the user can appropriately select the power saving mode or the video output mode It is another object of the present invention to provide a method of operating a broadcast receiver that displays power consumption for appropriately controlling power consumed in a broadcast receiver and a broadcast receiver employing the method.

According to an aspect of the present invention, there is provided a method of operating a broadcast receiver including: controlling a pulse width modulation (PWM) signal for controlling an output of a light source; Determining a duty ratio of the pulse width modulation signal; Determining a power consumption corresponding to a duty ratio of the determined pulse width modulation signal; And outputting a user interface for displaying current power consumption using the determined power consumption.

In this case, the pulse width modulation signal may be a signal for controlling a current applied to a fluorescent lamp or a light emitting diode.

Further, the method of operating the broadcast receiver may further include storing power consumption information consumed for each duty ratio of the plurality of pulse width modulated signals in a storage unit, wherein the consumed power corresponding to a duty ratio of the determined pulse width modulated signal The power determining step may determine the power consumption corresponding to the duty ratio of the determined pulse width modulation signal in the storage means.

The step of controlling the pulse width modulation signal for controlling the output of the light source may include controlling the pulse width modulation signal according to a predetermined mode set in the broadcast receiver.

In addition, the method of operating the broadcast receiver may further include receiving a power save mode from a user, wherein the step of controlling the pulse width modulation signal according to a predetermined mode set in the broadcast receiver comprises: And controls a duty ratio of the pulse width modulation signal.

In this case, the operation method of the broadcast receiver may further include the step of selecting a video output mode from a user, and the step of controlling the pulse width modulation signal according to a predetermined mode set in the broadcast receiver may include: And the duty ratio of the pulse width modulation signal is controlled according to the output mode.

Further, the method of operating the broadcast receiver may further include receiving a power consumption display command, wherein the step of determining the duty ratio of the pulse width modulation signal comprises: And the duty ratio of the signal is determined.

The method of operating the broadcast receiver may further include determining a volume of the audio signal output to the audio output unit and determining a power consumption corresponding to the determined volume of the audio signal.

In this case, the operation method of the broadcast receiver further includes storing power consumption information consumed for each of the plurality of audio signal volumes in the storage means, and determines power consumption corresponding to the determined volume of the audio signal The power consumption corresponding to the determined volume of the audio signal may be determined by the storage means.

The step of outputting the user interface displaying the current power consumption may include calculating a sum of the power consumption corresponding to the duty ratio of the determined pulse width modulation signal and the power consumption corresponding to the determined volume of the audio signal, And calculating the power.

A broadcast receiver according to another embodiment of the present invention controls a pulse width modulation (PWM) signal for controlling an output of a light source, determines a duty ratio of the pulse width modulation signal, A control unit for determining a power consumption corresponding to a duty ratio; And a display unit for outputting a user interface for displaying current power consumption by using the determined power consumption.

In this case, the pulse width modulation signal may be a signal for controlling a current applied to a fluorescent lamp or a light emitting diode.

In this case, the broadcast receiver may further include storage means for storing power consumption information consumed for each of a plurality of pulse width modulation signal duty ratios, and the control unit may control the duty ratio of the pulse width modulation signal And determines the corresponding power consumption.

In addition, the controller may control the pulse width modulation signal according to a predetermined mode set in the broadcast receiver.

In this case, the broadcast receiver may further include a user interface unit for selecting a power saving mode from a user, and the controller may control a duty ratio of the pulse width modulation signal according to the selected power saving mode.

The broadcast receiver may further include a user interface unit for selecting a video output mode from a user, and the controller may control a duty ratio of the pulse width modulation signal according to the selected video output mode.

Further, the broadcast receiver may further include a user interface unit for receiving a power consumption display command, and the controller may determine a duty ratio of the pulse width modulation signal in response to the reception of the consumption power display command. have.

The control unit may determine a volume of the audio signal output to the audio output unit and determine a power consumption corresponding to the determined volume of the audio signal.

The broadcast receiver may further include a storage unit that stores power consumption information consumed for each of a plurality of audio signal volumes, and the control unit determines power consumption corresponding to the determined volume of the audio signal in the storage unit .

The control unit may calculate the current power consumption by summing the power consumption corresponding to the duty ratio of the determined pulse width modulation signal and the power consumption corresponding to the determined volume of the audio signal.

The present invention has the effect of improving user convenience by providing information on the power consumption currently consumed by a user at a desired time in a broadcasting receiver.

The present invention has the effect of increasing the user's convenience by outputting the current power consumption according to the mode set in the broadcast receiver to the user interface and allowing the user to confirm the power consumption currently consumed.

Further, in the present invention, when the power saving mode is selected in the broadcast receiver, or when the video output mode is selected, information on the current power consumption is provided to the user so that the user can appropriately select the power saving mode or the video output mode It is possible to appropriately control the power consumed by the broadcast receiver.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a method of operating a broadcast receiver for displaying power consumption according to the present invention and a broadcast receiver employing the method will be described in detail.

Although the terms used in the present invention have been selected in consideration of the functions of the present invention, it is possible to use general terms that are currently widely used, but this may vary depending on the intention or custom of a person skilled in the art or the emergence of new technology. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not the name of a simple term, and the contents of the present invention throughout.

1 is a flowchart illustrating a process of determining current power consumption according to an embodiment of the present invention and providing the current power to a user.

Referring to FIG. 1, in step S101, a broadcast receiver sets a predetermined mode.

In step S102, the broadcast receiver controls a pulse width modulation (PWM) signal for adjusting the output of the light source output to the liquid crystal panel according to the setting of the specific mode as described above.

In this case, the mode set in the broadcast receiver includes all the modes in which the operation of controlling the PWM signal is caused to control the panel output, and may be set according to the input of the user, Function may be set.

The broadcast receiver may select a power saving mode from the user, and may control a PWM (Pulse Width Modulation) signal in the process of performing operations corresponding to the power saving mode.

For example, the broadcast receiver may select one of a plurality of power saving levels and control a PWM (Pulse Width Modulation) signal so that the corresponding power is consumed.

In addition, the broadcast receiver may select a video output mode from a user and control a PWM (Pulse Width Modulation) signal in a process of performing operations corresponding to a selected video output mode.

For example, when a broadcast receiver selects one of a plurality of video output modes (for example, a brightness control or a video output mode associated with luminance control) and performs operations corresponding to a selected video output mode, Modulation) signal.

In another embodiment, when the output is controlled by the backlight output setting of the user or the illuminance sensor of the illuminance sensor, a corresponding mode is set and a PWM (Pulse Width Modulation) signal can be controlled.

At this time, the broadcast receiver can control the output of the panel by controlling the duty ratio of the PWM (Pulse Width Modulation) signal output to the liquid crystal panel according to the set mode.

FIG. 2 is a view illustrating an embodiment in which a power save mode is set in a broadcast receiver according to the present invention.

2, a broadcast receiver according to an exemplary embodiment of the present invention outputs a user interface 201 receiving a power saving mode and a power saving level, and then outputs a PWM (Pulse Width Modulation) signal By controlling the duty ratio to adjust the output of the panel, the amount of power consumed is regulated.

At this time, the PWM (Pulse Width Modulation) signal may be a signal for controlling a current applied to a fluorescent lamp such as a light emitting diode or a cold cathode fluorescent lamp included in a backlight unit.

At this time, the broadcast receiver can control the panel output by controlling the current applied to the CCFL or the LED according to a PWM (Pulse Width Modulation) signal.

FIG. 3 is a diagram briefly showing an embodiment of controlling a current applied to an LED according to a PWM (Pulse Width Modulation) signal according to the present invention.

Referring to FIG. 3, the LED driver 301 applies a current to the LED 303 to drive the LED. In this case, the LED is connected to the switching unit 302, and the control unit 304 applies a PWM (Pulse Width Modulation) signal to the switching unit 302 to drive the LED.

FIG. 3 is a simplified illustration of LED dimming, and LED dimming may be performed by adjusting the forward current flowing through the LED through the PWM signal in various ways, according to an embodiment.

4 is a diagram illustrating an embodiment of a PWM signal according to an embodiment of the present invention. Referring to FIG. 4, the PWM signal for LED dimming has a period B for turning on the LED during the entire period A and a period for turning off the LED. At this time, the larger the duty ratio of the PWM signal is, the more the LED output luminance is increased and the consumed power is also increased.

When the user selects the power display menu to know the current power consumption and the power display command is received by the broadcast receiver, the broadcast receiver sets the duty ratio of the PWM signal output to the panel in step S103 Duty rate).

In this case, the duty ratio refers to the ratio of the ON period of the entire cycle of the PWM signal. For example, in FIG. 4, the duty ratio of the PWM signal is B / A * 100.

Next, in step S103, the broadcast receiver determines the power consumption corresponding to the duty ratio of the determined PWM signal.

At this time, the broadcast receiver may store the power consumption information consumed for each of the plurality of PWM signal duty ratios in the storage means, and the power consumption corresponding to the duty ratio of the determined PWM signal may be determined in the storage means.

FIG. 5 is a diagram illustrating an embodiment of storage means for recording power consumed by a panel according to a duty ratio of a PWM signal according to the present invention.

Referring to FIG. 5, a broadcast receiver according to an exemplary embodiment of the present invention stores power consumption information 502 corresponding to duty ratios 501 of PWM signals output to a panel.

In this case, the power consumption information 502 corresponding to each of the PWM signal duty ratios 501 may be determined in advance based on experimental values, or may be information automatically sensed and stored in the broadcasting receiver.

For example, if the duty ratio of the PWM signal determined in step S103 is 20, the broadcast receiver determines that the power consumed by the panel in the storage means is 400 Watt.

According to the embodiment, the broadcast receiver can determine the power consumption in the audio output unit in addition to the panel power consumption to determine the current consumption power.

For example, the broadcast receiver can determine the volume of the audio signal output to the audio output unit and determine the power consumption corresponding to the determined volume of the audio signal.

At this time, similarly, the broadcast receiver stores the power consumption information consumed for each of the plurality of audio signal volumes in advance in the storage means, determines the corresponding power consumption corresponding to the currently set volume in the storage means, Power can be judged.

FIG. 6 is a diagram illustrating an example of a storage unit that records power consumed by an audio output unit (for example, an amplifier) according to the volume of an audio signal according to the present invention.

6, a broadcast receiver according to an exemplary embodiment of the present invention stores power consumption information 602 corresponding to volume levels 601 of audio signals output to an audio output unit.

At this time, the power consumption information 602 corresponding to each volume level 601 may be determined in advance on the basis of experimental values, or may be information automatically sensed and stored in the broadcasting receiver.

For example, if the determined volume level of the audio signal is 5, the broadcast receiver determines that the power consumed by the audio output unit in the storage means is 10 Watt.

Next, in step S105, the broadcast receiver outputs a user interface that displays current power consumption using the determined power consumption.

At this time, the broadcast receiver calculates the current power consumption by using the power consumption information consumed in the panel determined by the above-described method and the power consumption information consumed in the audio output unit, and outputs the user interface for displaying the current power consumption.

For example, when it is determined that the power consumed by the panel is 400 Watt and the power consumed by the audio output unit is 10 Watt, the current power consumption may be 410 Watt, which is the sum of the two power consumption.

Also, according to the embodiment, the broadcast receiver may calculate the current power consumption by adding the power consumption information consumed by the main board or the power board to the power consumption information consumed by the audio output unit and the power consumption information consumed by the panel.

At this time, since the power consumption consumed by the main board or the power board is often a constant value, it may be set to a default value.

7 is a diagram illustrating an embodiment of a user interface for displaying current power consumption according to the present invention.

Referring to FIG. 7, a broadcast receiver according to an exemplary embodiment of the present invention may display current power consumption information and a power saving rate on a user interface 701, and may select a user to select a power saving mode again.

For example, the broadcast receiver 'current power consumption is 400 Watt, and the power saving rate is 20%. Quot; Do you want to select power saving mode? '.

At this time, the user interface 701 may be displayed in a predetermined area of the display screen, and may be output when the user selects the current power consumption information viewing menu according to the embodiment.

FIG. 7 illustrates one embodiment for displaying the current power consumption, and various embodiments for displaying the current power consumption may be applied.

8 is a view showing another embodiment of a user interface for displaying current power consumption according to the present invention.

Referring to FIG. 8, a broadcast receiver according to an exemplary embodiment of the present invention may calculate each item constituting current power consumption, and then output information on the item.

For example, a broadcast receiver may use a panel power consumption of '200 Watt', a power consumption of '10 Watt', an audio output unit (amplifier) judged by using a volume level, a power consumption of a main board or a power It is possible to output the user interface 801 informing that the power consumed by the board is calculated as '5 Watt'.

Therefore, the present invention has the effect of improving the user's convenience by providing information on the power consumption currently being consumed by the user at the broadcast receiver.

In addition, the present invention has the effect of improving the user's convenience by outputting the current power consumption according to the mode set in the broadcast receiver to the user interface, thereby allowing the user to confirm the amount of power consumption currently consumed.

Also, in the present invention, when the power save mode is selected in the broadcast receiver, or when the video output mode is selected, information on the current power consumption is provided to the user so that the user can appropriately select the power saving mode or the video output mode It is possible to appropriately control the power consumed by the broadcast receiver.

9 is a block diagram illustrating a configuration of a broadcast receiver according to an embodiment of the present invention.

The broadcast data stream received from the tuner 910 is transmitted to and displayed on the display unit 900 through the demodulator 920, the demultiplexer 930, the decoder 940, and the A / V output unit 980 .

The operation of the tuner 910, the demodulator 920 and the demultiplexer 930 can be controlled through the controller 950 and the storage 960 can be further included.

When a user selects and designates a desired broadcast channel by operating the broadcast receiver having such a configuration, the control unit 950 controls the tuner 910 to tune to the corresponding broadcast channel, and the demodulator 920 and the demultiplexer The data stream of the broadcast program provided through the broadcast channel is separated into audio and video data and the like.

The decoder 940 decodes the data output from the demultiplexer 930 into audio and video signals and outputs the audio and video signals to the display unit 900 or the speaker unit 900 through the A / V output unit 980. [ An audio output unit 970 such as an amplifier, and the like.

At this time, the backlight unit 100 is driven through the backlight driving unit 300 so that a screen displayed on the liquid crystal panel 200 is displayed.

Meanwhile, the broadcast data stream transmitted to the demultiplexer 920 may be provided through the Internet.

 The control unit 950 controls a PWM (Pulse Width Modulation) signal for dimming the light source output to the liquid crystal panel 200, determines the duty ratio of the PWM signal for dimming the light source output to the panel, And determines the power consumption corresponding to the duty ratio of the PWM signal.

At this time, the controller may control a PWM (Pulse Width Modulation) signal output to the display unit according to a predetermined mode set in the broadcast receiver.

The display unit 900 outputs a user interface for displaying the current power consumption using the determined power consumption.

In this case, the PWM signal may be a signal for controlling the current applied to the LED.

The storage means 960 stores power consumption information consumed for each of a plurality of PWM signal duty ratios. The control unit 950 can determine the power consumption corresponding to the duty ratio of the PWM signal determined in the storage unit.

The user interface unit 990 selects a power saving mode from the user. In this case, the controller 950 may control a duty ratio of a PWM (Pulse Width Modulation) signal output to the display unit according to the selected power saving mode.

Also, according to the embodiment, the user interface unit 990 selects the video output mode from the user, and the control unit controls the duty ratio of the PWM (Pulse Width Modulation) signal output to the display unit according to the selected video output mode have.

The user interface unit 990 receives the power consumption display command and the controller can determine the duty ratio of the PWM signal output to the display unit in response to the reception of the consumption power display command.

The controller 960 may determine the volume of the audio signal output to the audio output unit and determine the power consumption corresponding to the determined volume of the audio signal.

The storage unit 960 stores power consumption information consumed for each of a plurality of audio signal volumes, and the controller 950 can determine power consumption corresponding to the determined volume of the audio signal in the storage unit 960 .

The controller 950 may calculate the current power consumption by summing the power consumption corresponding to the duty ratio of the determined PWM signal and the power consumption corresponding to the determined volume of the audio signal.

The broadcast receiver according to the present invention has been described so far, and the technical contents described in the above embodiments can be applied to the broadcast receiver of FIG. 9 as it is, so that detailed description thereof will be omitted below.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

FIG. 1 is a flowchart illustrating a process of determining current power consumption according to an embodiment of the present invention and providing the current power to a user.

FIG. 2 illustrates an embodiment in which a power saving mode is set in a broadcast receiver according to the present invention. FIG.

3 is a view schematically showing an embodiment for controlling a current applied to an LED according to a PWM (Pulse Width Modulation) signal according to the present invention.

4 illustrates one embodiment of a PWM signal in accordance with one embodiment of the present invention.

FIG. 5 is a diagram illustrating an embodiment of a storage unit that records power consumed by a panel according to a duty ratio of a PWM signal according to the present invention. FIG.

6 is a diagram illustrating an example of a storage unit in which power consumed by an audio output unit (for example, an amplifier) is recorded for each volume of an audio signal according to the present invention.

7 illustrates an embodiment of a user interface that displays current power consumption in accordance with the present invention.

Figure 8 illustrates another embodiment of a user interface that displays current power consumption in accordance with the present invention.

9 is a block diagram illustrating a configuration of a broadcast receiver according to an embodiment of the present invention.

Description of the Related Art

900:

910: Tuner

920:

930: Demultiplexer

940: Audio / video decoder

950:

960: Storage means

970: audio output section

980: A / V output section

990: User interface section

Claims (20)

Storing information on power consumption per a plurality of pulse width modulation signals in storage means; Controlling a pulse width modulation (PWM) signal for adjusting an output of the light source; Determining a duty ratio of the pulse width modulation signal; Determining a first power consumption corresponding to a duty ratio of the determined pulse width modulation signal based on the information stored in the storage means; Determining a volume of an audio signal output to the audio output unit and determining a second power consumption corresponding to the determined volume of the audio signal; And Outputting a user interface indicating the determined first power consumption and the determined second power consumption And transmitting the broadcast signal to the broadcast receiver. Claim 2 has been abandoned due to the setting registration fee. The method according to claim 1, Wherein the pulse width modulated signal is a signal for controlling a current applied to a fluorescent lamp or a light emitting diode. delete Claim 4 has been abandoned due to the setting registration fee. The method according to claim 1, Wherein controlling the pulse width modulation signal to adjust the output of the light source comprises: And controlling the pulse width modulation signal according to a predetermined mode set in a broadcast receiver. Claim 5 has been abandoned due to the setting registration fee. 5. The method of claim 4, Further comprising receiving a power save mode from a user, Wherein the step of controlling the pulse width modulation signal according to a predetermined mode set in the broadcast receiver comprises: And controlling the duty ratio of the pulse width modulation signal according to the selected power saving mode. Claim 6 has been abandoned due to the setting registration fee. 5. The method of claim 4, Further comprising the step of selecting a video output mode from a user, Wherein the step of controlling the pulse width modulation signal according to a predetermined mode set in the broadcast receiver comprises: Claim 7 has been abandoned due to the setting registration fee. The method according to claim 1, The step of receiving the power consumption display command Further comprising: Wherein the step of determining the duty ratio of the pulse width modulation signal determines a duty ratio of the pulse width modulation signal in response to the reception of the power consumption display command. delete Claim 9 has been abandoned due to the setting registration fee. The method according to claim 1, Storing power consumption information consumed for each of a plurality of audio signal volumes in storage means Further comprising: Wherein the determining of the second power consumption corresponding to the determined volume of the audio signal determines power consumption corresponding to the volume of the audio signal determined by the storage means. Claim 10 has been abandoned due to the setting registration fee. The method according to claim 1, Wherein the outputting of the user interface displaying the determined first power consumption and the determined second power consumption comprises: Displaying on the user interface current power consumption obtained by adding the determined first power consumption and the determined second power consumption; And transmitting the broadcast signal to the broadcast receiver. Storage means for storing information on power consumption per a plurality of per ply modulation signals; A control unit for controlling a pulse width modulation signal for adjusting an output of the light source, determining a duty ratio of the pulse width modulation signal, and calculating a duty ratio of the determined pulse width modulation signal based on the information stored in the storage unit A control unit for determining a first power consumption corresponding to the audio signal, determining a volume of the audio signal output to the audio output unit, and determining a second power consumption corresponding to the determined volume of the audio signal; And A display unit for outputting a user interface for displaying the determined first power consumption and the determined second power consumption; The broadcast receiver comprising: 12. The method of claim 11, Wherein the pulse width modulated signal is a signal for controlling a current applied to a fluorescent lamp or a light emitting diode. delete 12. The method of claim 11, Wherein, And controls the pulse width modulation signal according to a predetermined mode set in a broadcast receiver. 15. The method of claim 14, Further comprising a user interface unit for selecting a power saving mode from a user, Wherein the control unit controls the duty ratio of the pulse width modulation signal according to the selected power saving mode. 15. The method of claim 14, Further comprising a user interface unit for selecting a video output mode from a user, Wherein the control unit controls the duty ratio of the pulse width modulation signal according to the selected video output mode. 12. The method of claim 11, A user interface unit for receiving a power consumption display command Further comprising: Wherein the control unit determines the duty ratio of the pulse width modulation signal in response to receiving the power consumption display command. delete 12. The method of claim 11, Further comprising storage means for storing power consumption information consumed for each of a plurality of audio signal volumes, Wherein the control unit determines power consumption corresponding to a volume of the audio signal determined by the storage unit when determining the second power consumption. 12. The method of claim 11, Wherein, And displays on the user interface current power consumption obtained by adding the determined first power consumption and the determined second power consumption.

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