JP2007259134A - Portable telephone device and method for reducing power consumption in it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a call state with high accuracy, and to surely decrease current consumption during a speech call. <P>SOLUTION: A portable telephone device has a radio unit 2 and a display unit 5 conducting radio communication, a receiver 8 outputting a speech, a camera 10 fitted near the receiver 8, and a detector 12 detecting an arrangement near the ear of a user of the portable telephone device on the basis of the lightness, contour or the like of image data acquired by the camera 10. The portable telephone device further has a display-unit control means 4 for stopping or extinguishing the illumination of the display unit 5, or a radio-unit control means for controlling the sending power of the radio unit 2 to a specified upper-limit value or smaller when the portable telephone device is arranged near the ear of the user. The state in which the portable telephone device is disposed near the ear of the user can be detected with high accuracy by analyzing the image data, and the power consumption of the display unit 5 and the radio unit 2 during the call can be reduced surely. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile phone device and a power consumption reduction method in the mobile phone device, and more particularly to a mobile phone device including a camera unit in the vicinity of a receiver unit that outputs sound and a power consumption reduction method in the mobile phone device.

  In the field of mobile phone devices, multi-function and miniaturization are required. In terms of multi-functionality, power consumption is increasing, and in terms of miniaturization, batteries are decreasing. It is sought after.

  In response to the above request, for example, in Patent Document 1 below, in a mobile phone device having a camera function and a display function, distance detection means for detecting the distance between the apparatus main body and the user, and the detected distance And a determination means for determining whether or not the apparatus main body is at a normal call position based on the above, and a technique for controlling the operation of the camera function and the display function according to the determination result is disclosed.

  Patent Document 2 listed below includes a detecting means for detecting whether or not a call is in progress and a light detecting means for detecting light that is disposed in a place covered by a part of the user's body during the conversation. And an illumination dimming means for dimming the illumination when light is detected and the brightness of the light is below a threshold is disclosed.

JP 2002-111801 (page 3-6, FIG. 4) JP 2002-374348 A (page 2-5, FIG. 2)

  However, in Patent Document 1, since the distance detection unit only detects the distance between the mobile phone device and another object, it cannot accurately determine whether or not the device body is at the normal call position. . For example, when the finger is placed in front of the distance detecting means, the detected distance is determined to be equal to or less than a predetermined distance, and thus the illumination of the display unit is turned off even when the call is not being performed. On the other hand, when the mobile phone device is separated from the ear to some extent, the detected distance is determined to be greater than or equal to a predetermined distance.

  Further, in Patent Document 2, it is possible to detect whether or not a call is being made by the call detecting means. However, since the light detecting means detects the brightness of the entire surroundings, the apparatus main body is still a normal call. It cannot be accurately determined whether or not it is in a position. For example, when the surroundings are dark, the brightness of the light may be determined to be below the threshold even when the device is not close to the ear. The trouble that it ends up occurs. On the other hand, if the surroundings are bright, the brightness of the light may be determined to be greater than or equal to the threshold value when the device is not in close contact with the ear. The trouble that it is not done occurs.

  The present invention has been made in view of the above problems, and its main purpose is to detect a voice call state in which a receiver unit of a mobile phone device is arranged in the vicinity of a user's ear with high accuracy, and to perform a voice call. It is an object of the present invention to provide a mobile phone device capable of reliably reducing power consumption in a mobile phone and a method for reducing power consumption in the mobile phone device.

  In order to achieve the above object, the present invention provides a mobile phone device having at least a radio unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit. A detection unit that detects a state in which the receiver unit of the mobile phone device is disposed in the vicinity of a user's ear based on the image data acquired in step S, and the display unit when the mobile phone device is in the state Display unit control means for stopping or dimming the illumination.

  The present invention also provides image data acquired by the camera unit in a mobile phone device having at least a wireless unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit. A detection unit that detects a state in which the receiver unit of the mobile phone device is disposed in the vicinity of a user's ear, and a transmission output of the wireless unit in advance when the mobile phone device is in the state. And wireless unit control means for controlling the value to a predetermined upper limit value or less.

  In the present invention, the detection unit detects the brightness of an image based on image data, and the receiver unit of the mobile phone device when the brightness of the entire image or a specific area is equal to or less than a predetermined value. It can be set as the structure which judges that it is the state arrange | positioned in the user's ear vicinity.

  In the present invention, the detection unit extracts an image contour based on image data, and the receiver of the mobile phone device is substantially matched with the contour information of the ear stored in advance. It can be set as the structure which judges that the part is the state arrange | positioned in the user's ear vicinity.

  Further, in the present invention, the camera unit acquires image data at a predetermined time interval, and the detection unit is based on the change in the brightness of the entire image or a specific region or the change in the contour. The mobile phone device may be configured to determine a state in which the receiver unit is approaching the user's ear.

  Further, the present invention is a method for reducing power consumption in a mobile phone device having at least a radio unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit, An image data acquisition step for acquiring image data by the camera unit, and detection for detecting a state in which the receiver unit of the mobile phone device is arranged near the user's ear based on the image data acquired by the camera unit And at least a control step of stopping display on the display unit when the mobile phone device is in the state.

  Further, the present invention is a method for reducing power consumption in a mobile phone device having at least a radio unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit, An image data acquisition step for acquiring image data by the camera unit, and detection for detecting a state in which the receiver unit of the mobile phone device is arranged near the user's ear based on the image data acquired by the camera unit And a control step of controlling the transmission output of the wireless unit to be equal to or lower than a predetermined upper limit value when the mobile phone device is in the state.

  In the present invention, in the detection step, the brightness of the image based on the image data is detected, and when the brightness of the entire image or a specific area is equal to or less than a predetermined value, the receiver unit of the mobile phone device It can be set as the structure which judges that it is the state arrange | positioned in the user's ear vicinity.

  In the present invention, in the detection step, an outline of an image based on image data is extracted, and the receiver of the mobile phone device is substantially matched with the outline information of the ear stored in advance. It can be set as the structure which judges that the part is the state arrange | positioned in the user's ear vicinity.

  Further, in the present invention, in the image data acquisition step, image data is acquired at a predetermined time interval, and in the detection step, the brightness change of the entire image or a specific region, or the change of the contour is detected. Based on this, it can be configured to determine a state in which the receiver unit of the mobile phone device is approaching the user's ear.

  As described above, in the present invention, the camera unit provided in the vicinity of the receiver unit of the mobile phone device is used, and based on the image data acquired by the camera unit, the receiver unit of the mobile phone device is in the vicinity of the user's ear. When the voice call state is detected and the mobile phone device is in a voice call state, the display unit control means stops or dims the illumination of the display unit, or the radio unit control unit transmits the radio unit transmission power. Is controlled to be equal to or lower than a predetermined upper limit, so that power consumption during a voice call can be reliably reduced.

  According to the mobile phone device and the power consumption reduction method in the mobile phone device of the present invention, power consumption during a voice call can be reliably reduced.

  The reason for this is that, in a mobile phone device provided with a camera unit in the vicinity of a receiver unit that outputs sound, the receiver unit of the mobile phone device is arranged in the vicinity of the user's ear based on image data acquired by the camera unit. Since the detection unit for detecting the call state and the display unit control means for stopping or dimming the illumination of the display unit when the mobile phone device is in the voice call state, the voice call state is detected with high accuracy. This is because power consumption of the display portion during a voice call can be reduced.

  In addition, when the mobile phone device is in a voice call state, the wireless unit control means for controlling the transmission power of the wireless unit to a predetermined upper limit value or less is provided, so that the voice call state can be detected with high accuracy. This is because the power consumption of the wireless unit during a voice call can be reduced.

  In a preferred embodiment of the mobile phone device according to the present invention, a wireless unit that performs wireless communication, a display unit, a receiver unit that outputs sound, a camera unit provided near the receiver unit, and a camera unit The receiver unit of the mobile phone device is located near the user's ear based on the brightness, saturation, contour, etc. of the image data acquired in step 1, and the mobile phone device is in the voice call state. The display unit control means for stopping or dimming the illumination of the display unit, or the radio unit control means for controlling the transmission power of the radio unit to a predetermined upper limit value or less. Focusing on the fact that the user cannot see the display unit when the receiver unit is close to the ear in order to make a call, reducing the power consumption of the display unit during the call, and the user making a call For In a state as close to the receiver portion to the ear and focused to a point where the antenna characteristic is improved, to reduce the power consumption of the radio unit during a call. Thereby, the voice call state can be detected with high accuracy, and the power consumption during the voice call can be surely reduced.

  In order to describe the above-described embodiment of the present invention in more detail, a cellular phone device and a power consumption reduction method in the cellular phone device according to the first embodiment of the present invention will be described with reference to FIGS. explain. FIG. 1 is a front view and a rear view showing an overview of a mobile phone device according to the present embodiment, and FIG. 2 is a block diagram showing a configuration of the mobile phone device according to the present embodiment. FIG. 3 is a flowchart showing a power consumption reduction operation using the cellular phone device according to the present embodiment.

  As shown in FIG. 1, the cellular phone device of this embodiment has a folded shape, and a receiver unit 8 that outputs audio and a microphone unit 9 that inputs audio are inside (front) the cellular phone device. In addition to the display unit 5 such as an LCD (Liquid Crystal Display), the input unit 7 consisting of a cross key, numeric keys, special keys, etc., the front side is imaged in the vicinity of the receiver unit 8 and image data in a predetermined format is output. A camera unit 10 or the like is provided. In addition, a rear display unit 6, a rear camera unit 11, and the like are provided on the outer side (back side) of the mobile phone device. In addition, an antenna 3 is provided at an arbitrary location of the mobile phone device (for example, an upper portion of the display unit side body or a hinge portion). In FIG. 1, the structure including the camera unit 10 inside the display unit side body is illustrated, but the structure including a rotatable camera unit (capable of changing the imaging direction) above the display unit side body. It is good. Further, in the mobile phone device of this embodiment, it is sufficient that the camera unit 10 is installed at least in the vicinity of the receiver unit 8, and the rear display unit 6 and the rear camera unit 11 are arbitrary, and the display unit 5 and the input unit 7. The configuration and arrangement of these are also arbitrary. In addition, although a foldable mobile phone device is shown in FIG. 1, the shape of the mobile phone device is arbitrary, and it may be an integrated type or a slide type configured with one housing.

  2 is a block diagram showing the means of the mobile phone device of the present embodiment. In addition to the above, the display unit control means 4 for controlling the display of the display unit 5 and the rear display unit 6, and the camera Based on the image data acquired by the unit 10, the receiver unit 8 of the mobile phone device detects a voice call state arranged in the vicinity of the user's ear, and the control unit 1 controls each means. I have.

  The display unit 5 is a display method for illuminating the liquid crystal panel with a backlight (hereinafter referred to as a constant display method), or a display method for turning off the backlight or dimming in a voice call state (hereinafter referred to as a low power display). The display unit control means 4 controls the display of the display unit 5 in accordance with the selected method in accordance with the input of the input unit 7.

  The detection unit 12 performs a function of detecting a voice call state in which the receiver unit 8 of the mobile phone device is disposed in the vicinity of the user's ear by analyzing the image data acquired by the camera unit 10. As a detection method, for example, since the image becomes dark when the ear is approaching, the lightness of each pixel of the image is extracted, and when the lightness is equal to or less than a predetermined value, the receiver unit 8 of the mobile phone device. Can be determined to be placed near the user's ear. Note that the lightness detection method is not particularly limited. For example, if the value of each pixel of the image data is large, the image is bright. Therefore, a predetermined number of pixels are sampled from the entire image, and the values of the sampled pixels are averaged. A technique such as specifying the brightness of an image can be used.

  In addition, when using the average value of brightness, there is a risk that the detection accuracy may be reduced due to the influence of ambient brightness. For example, the pixel of a specific area of the image (for example, the area near the center) The brightness and the specified value may be compared. With this configuration, even when the surroundings are bright, the center portion of the ear is sufficiently dark, so that the detection accuracy can be increased. In addition, if the lightness is simply used as a reference, it may be determined that the mobile phone device is placed near the user's ear even when other objects are close to each other, for example, instead of lightness or together with lightness, It is also possible to increase the detection accuracy by detecting the saturation (color) of the image from the ratio of the RGB values of the pixels and comparing the detected color with the ear color (skin color) stored in advance. Also, by extracting the contour of the image by image processing and comparing the extracted contour with the pre-stored ear contour information, it is ensured that the mobile phone device is placed near the user's ear. Can be detected.

  In addition, the detection may be performed based on one image data. For example, the image data is acquired at a predetermined interval, and the mobile phone device is located near the user's ear based on the change in the image information. You may detect the state which is approaching. For example, when the brightness of the image is gradually reduced (the image is gradually darkened), it is determined that it is approaching the ear, or the brightness of the image is gradually reduced and the brightness distribution is gradually reduced (that is, the entire image is When it becomes darker), it can be determined that it is approaching the ear, or when the contour of the ear extracted from the image gradually increases, it can be determined that the ear is approaching. As described above, the determination based on the change in the image information can make it difficult to be influenced by the brightness of the surroundings, and the mobile phone device is in close contact with the user's ear or is arranged slightly apart. It can also be judged. Furthermore, by combining the plurality of detection methods described above, the positional relationship between the mobile phone device and the user's ear can be determined with higher accuracy.

  Next, an operation for reducing the power consumption of the display unit 5 during a voice call using the mobile phone device having the above configuration will be described with reference to the flowchart of FIG.

  First, in step S101, the control unit 1 determines that a key operation (for example, pressing of a call key) is performed in the input unit 7 in step S102 when the mobile phone device is in an incoming or outgoing voice call. Establish a voice call.

  Next, in step S103, either a constant display method or a low power display method is selected during a voice call. When the low power display method is selected, the control unit 1 activates the camera unit 10 to acquire image data and outputs the image data to the detection unit 12 in step S104. Note that the camera unit 10 may acquire the image data once, or may acquire the image data a plurality of times at a predetermined interval.

  Next, in step S105, the detection unit 12 analyzes the image data acquired by the camera unit 10 and detects the brightness of the image based on the image data. Here, since the camera part 10 is arrange | positioned in the receiver part 8 vicinity of a mobile telephone apparatus, when a mobile telephone apparatus is applied to an ear, it will become a substantially dark image.

  Next, in step S <b> 106, the detection unit 12 compares the detected brightness with a preset value of brightness set in advance. If the detected brightness is lower than the specified value, it is determined that the mobile phone device is placed near the user's ear, and the display unit control means 4 stops the display of the display unit 5 in step S107. (That is, the backlight is turned off or dimmed.)

  Although the brightness of the entire image is compared with the specified value here, the present embodiment analyzes the image data. For example, the brightness of the center of the image is detected, or the brightness distribution of the image is detected. Thus, it is possible to reliably detect a state in which the mobile phone device is in close contact with or close to the ear while suppressing the influence of ambient brightness. In addition, by detecting the saturation (color) of the image and comparing it with the color of the ear, it is possible to reliably detect the state where the mobile phone device is in close contact with or close to the ear without being affected by the surrounding brightness. You can also In addition, by extracting the contour of the image instead of brightness and saturation and comparing it with pre-stored ear contour information, the mobile phone device is in close contact with or close to the ear without being affected by ambient brightness. It is also possible to reliably detect the state that is being performed. Furthermore, by analyzing a plurality of image data acquired at predetermined intervals, it is possible to accurately detect the positional relationship between the mobile phone device and the user's ear.

,
If the detected brightness is larger than the specified value (the image is bright) in step S106, it is determined that the ear is far away from the mobile phone device, and the display unit 5 is normally set in step S108. Display on the street. When the voice call ends in step S109, the control unit 1 stops the operation of the camera unit 10 in step S110.

  On the other hand, if the continuous display method is selected in step S103, the display unit 5 during the voice call displays in the normal display method in step S111, and the voice call is terminated in step S112.

  In the above flow, the display method is selected after the voice call is established in step S102. However, when the display method is selected in advance and the low power display method is selected, immediately after the voice call is established or You may make it stop the display of the display part 5 automatically after predetermined time progress. In the above flow, only the display on the front display unit 5 is stopped. However, since the display on the rear display unit 6 is not seen during a voice call, the display on the rear display unit 6 is also stopped. Also good.

  As described above, in the mobile phone device of the present embodiment, the image data acquired by the camera unit 10 is analyzed, and the positional relationship between the mobile phone device and the user's ear based on the brightness, the distribution of brightness, the color, the contour, and the like. Therefore, it is possible to detect the voice call state in which the receiver unit 8 of the mobile phone device is arranged near the user's ear with high accuracy. Further, since the display unit 5 is not seen when the mobile phone device is in a voice call state, the power consumption of the display unit 5 during the voice call can be reliably reduced by stopping the display.

  Next, a mobile phone device according to a second embodiment of the present invention and a power consumption reduction method in the mobile phone device will be described with reference to FIGS. FIG. 4 is a block diagram illustrating a configuration of the mobile phone device according to the present embodiment, and FIG. 5 is a flowchart illustrating an operation for reducing power consumption using the mobile phone device according to the present embodiment.

  In general, since the antenna characteristics change depending on the presence or absence of an object that blocks radio waves, the mobile phone device changes the transmission power within the standard in order to maintain a good communication state. In the state where the telephone device is placed in the vicinity of the ear), the angle of the antenna is kept substantially constant, and the positional relationship between the ear (head) and the antenna is kept substantially constant. It becomes good. Therefore, in the present embodiment, the power consumption of the wireless unit is controlled by controlling the transmission power of the mobile phone device to an upper limit value or less during a voice call in which the receiver unit 8 of the mobile phone device is arranged near the user's ear. To reduce

  The appearance configuration of the mobile phone device is the same as that in FIG. 1, and the receiver unit 8, the microphone unit 9, the display unit 5, the input unit 7, the camera unit 10 in the vicinity of the receiver unit 8, etc. And a rear display unit 6, a rear camera unit 11, and the like on the outside (rear side) of the mobile phone device, and an antenna 3 at an arbitrary location of the mobile phone device. As shown in FIG. 4, the mobile phone device according to the present embodiment includes a detection unit 12 that detects a voice call state in which the receiver unit 8 of the mobile phone device is disposed near the user's ear, and the radio unit 2. Wireless unit control means 13 for controlling the communication method.

  The wireless unit 12 performs communication with a normal transmission power (hereinafter referred to as a normal communication method), or a method in which an upper limit value is provided for the transmission power of the wireless unit 12 and communication is performed with a transmission power equal to or lower than the upper limit value. (Hereinafter referred to as a low-power communication method) can be selected, and the wireless unit control means 13 controls communication of the wireless unit 12 according to the selected method in accordance with the input of the input unit 7. To do.

  Next, an operation for reducing power consumption for reducing the transmission power of the wireless unit 12 during a voice call using the mobile phone device having the above configuration will be described with reference to the flowchart of FIG.

  First, in step S201, the control unit 1 establishes a voice call when a key operation is performed on the input unit 7 in step S202 when the mobile phone device is in an incoming or outgoing call state.

  Next, in step S203, either a normal communication system or a low power communication system is selected during a voice call. When the low power communication method is selected, the control unit 1 activates the camera unit 10 to acquire image data and outputs it to the detection unit 12 in step S204. Similar to the first embodiment, the camera unit 10 may acquire the image data once, or may acquire it a plurality of times at predetermined intervals.

  Next, in step S205, the detection unit 12 analyzes the image data acquired by the camera unit 10 and detects the brightness of the image based on the image data. Here, since the camera part 10 is arrange | positioned in the receiver part 8 vicinity of a mobile telephone apparatus, when a mobile telephone apparatus is applied to an ear, it will become a substantially dark image.

  Next, in step S206, the detection unit 12 compares the detected brightness with a preset value of brightness set in advance. If the detected brightness is lower than the specified value, it is determined that the mobile phone device is located near the user's ear, and the wireless unit control means 13 determines the transmission power of the wireless unit 12 in step S207. Set the upper limit. As a result, the output exceeding the preset transmission power is not transmitted.

  Here, the overall brightness of the image is compared with the specified value. However, as described above, since the image data is analyzed in this embodiment, for example, the brightness of the center portion of the image is detected, or the image By detecting the brightness distribution, it is possible to suppress the influence of ambient brightness and reliably detect a state in which the mobile phone device is in close contact with or close to the ear. Further, by detecting the saturation (color) of the image and comparing it with the color of the ear, it is possible to reliably detect the state in which the mobile phone device is in close contact with or close to the ear without being affected by the surrounding brightness. You can also In addition, by extracting the contour of the image instead of brightness and saturation and comparing it with pre-stored ear contour information, the mobile phone device is in close contact with or close to the ear without being affected by ambient brightness. It is also possible to reliably detect the state that is being performed. Furthermore, by analyzing a plurality of image data acquired at predetermined intervals, it is possible to accurately detect the positional relationship between the mobile phone device and the user's ear.

  If the detected brightness is larger than the specified value (the image is bright) in step S206, it is determined that the ear is far away from the mobile phone device, and the upper limit of the transmission power is determined in step S208. Cancel the value setting and adjust the transmission power within the range specified by the Radio Law. When the voice call ends in step S209, the control unit 1 stops the operation of the camera unit 10 in step S210.

  On the other hand, if the normal communication method is selected in step S203, the upper limit value of the transmission power is canceled in step S211 and a voice call is performed by adjusting the output of the transmission power within the range defined by the Radio Law. In S212, the voice call is terminated.

  In the above flow, the communication method is selected after the voice call is established in step S202. However, when the communication method is selected in advance and the low power communication method is selected, immediately after the voice call is established or You may make it set the upper limit of transmission power automatically after predetermined time progress.

  As described above, in the mobile phone device of the present embodiment, the image data acquired by the camera unit 10 is analyzed, and the positional relationship between the mobile phone device and the user's ear based on the brightness, the distribution of brightness, the color, the contour, and the like. Therefore, it is possible to detect the voice call state in which the receiver unit 8 of the mobile phone device is arranged near the user's ear with high accuracy. Since the antenna characteristics are good when the mobile phone device is in a voice call state, the power consumption of the wireless unit 2 during the voice call is reliably reduced by setting an upper limit value for the transmission power of the wireless unit 12 can do.

  In each of the above embodiments, the display unit 5 is stopped or dimmed, or the transmission power of the radio unit 12 is controlled to be lower than the upper limit value. The present invention is not limited to the embodiment, and both controls may be performed at the same time. When the input unit 7 is illuminated with the backlight, the illumination is turned off or the application is stopped. Controls may be combined.

  The present invention can be applied to a mobile phone device having an arbitrary structure including the camera unit 10 in the vicinity of the receiver unit 7.

It is the front view and back view which show the general view of the mobile telephone apparatus which concerns on 1st Example of this invention. It is a block diagram which shows typically the structure of the mobile telephone apparatus which concerns on 1st Example of this invention. It is a flowchart figure which shows the operation | movement of the power consumption reduction in the mobile telephone apparatus which concerns on 1st Example of this invention. It is a block diagram which shows typically the structure of the mobile telephone apparatus which concerns on 2nd Example of this invention. It is a flowchart figure which shows the operation | movement of the power consumption reduction in the mobile telephone apparatus which concerns on 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control part 2 Radio | wireless part 3 Antenna 4 Display part control means 5 Display part 6 Rear display part 7 Input part 8 Receiver part 9 Microphone part 10 Camera part 11 Back camera part 12 Detection part 13 Radio | wireless part control means

Claims (10)

In a mobile phone device having at least a wireless unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit,
Based on the image data acquired by the camera unit, a detection unit that detects a state in which the receiver unit of the mobile phone device is arranged in the vicinity of a user's ear,
And a display unit control means for stopping or dimming the illumination of the display unit when the mobile phone device is in the state. In a mobile phone device having at least a wireless unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit,
Based on the image data acquired by the camera unit, a detection unit that detects a state in which the receiver unit of the mobile phone device is arranged in the vicinity of a user's ear,
And a wireless unit control unit configured to control a transmission output of the wireless unit to a predetermined upper limit value or less when the mobile phone device is in the state.   The detection unit detects the brightness of the image based on the image data, and when the brightness of the entire image or a specific area is equal to or less than a predetermined value, the receiver unit of the mobile phone device receives the user's ear. The mobile phone device according to claim 1, wherein the mobile phone device is determined to be in a state of being arranged in the vicinity.   In the detection unit, the contour of the image based on the image data is extracted, and when the contour and the contour information of the ear stored in advance substantially match, the receiver unit of the mobile phone device is near the user's ear The mobile phone device according to claim 1, wherein the mobile phone device is determined to be in a state where the mobile phone device is disposed. The camera unit acquires image data at predetermined time intervals,
The detection unit determines a state in which the receiver unit of the mobile phone device is approaching a user's ear based on a change in brightness of the entire image or a specific region or a change in the contour. The mobile phone device according to claim 1, wherein the mobile phone device is a mobile phone device. A power consumption reduction method in a mobile phone device having at least a wireless unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit,
An image data acquisition step of acquiring image data in the camera unit;
Based on the image data acquired by the camera unit, a detection step of detecting a state where the receiver unit of the mobile phone device is arranged in the vicinity of a user's ear;
And a control step for stopping display on the display unit when the mobile phone device is in the state. A power consumption reduction method in a mobile phone device having at least a wireless unit, a display unit, a receiver unit that outputs sound, and a camera unit installed in the vicinity of the receiver unit,
An image data acquisition step of acquiring image data in the camera unit;
Based on the image data acquired by the camera unit, a detection step of detecting a state where the receiver unit of the mobile phone device is arranged in the vicinity of a user's ear;
And a control step for controlling the transmission output of the wireless unit to be equal to or lower than a predetermined upper limit value when the mobile phone device is in the state.   In the detection step, the brightness of the image based on the image data is detected, and when the brightness of the entire image or a specific area is equal to or less than a predetermined value, the receiver unit of the mobile phone device receives the user's ear. 8. The method of reducing power consumption in a mobile phone device according to claim 6, wherein it is determined that the mobile phone device is located in the vicinity.   In the detection step, when the contour of the image based on the image data is extracted and the contour and the contour information of the ear stored in advance substantially match, the receiver unit of the mobile phone device is near the user's ear 8. The method of reducing power consumption in a mobile phone device according to claim 6, wherein the mobile phone device is determined to be in a state where the mobile phone device is disposed. In the image data acquisition step, image data is acquired at predetermined intervals,
In the detection step, it is determined whether the receiver unit of the mobile phone device is close to a user's ear based on a change in brightness of the entire image or a specific area or a change in the contour. The method for reducing power consumption in a mobile phone device according to any one of claims 6 to 9.

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