Patent Publication Number: US-2007109291-A1

Title: Portable electronic apparatus and portable music-reproducing apparatus

Description:
The present application is based on Japanese patent application No. 2005-328211, the entire contents of which are incorporated herein by reference.  
     BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a portable electronic apparatus and a portable music-reproducing apparatus each having a displaying portion which is capable of displaying thereon information such as characters and an image, and more particularly to a portable electronic apparatus and a portable music-reproducing apparatus which are capable of realizing power saving promotion.  
      2. Description of Related Art  
      In recent years, portable electric apparatuses have been known each of which has a storing portion such as a hard disc drive or a flash memory, reproduces musical data stored in the storing portion, and outputs a sound through an outputting portion such as a headphone. Some portable electronic apparatuses have each a displaying portion constituted by an organic electro-luminescence (EL) display device or a light emitting diode (LED) for displaying thereon characters and an image. However, while the displaying portion displays thereon characters and an image, it is supplied with a power from a battery built in a main body. As a result, it becomes a problem to suppress power consumption required for the display.  
      A portable electronic apparatus which changes display of characters displayed on a display panel has been proposed as one that realizes the power saving promotion, when a battery voltage drops to a level equal to or lower than a given level and low voltage display control is set. This portable electronic apparatus, for example, is disclosed in the Japanese Patent Kokai No. 2004-178029 (refer to FIG. 3 and a paragraph [0013]).  
      According to the portable electronic apparatus disclosed in the Japanese Patent Kokai No. 2004-178029, sizes of characters displayed on a display panel are reduced, or lines of the characters are made slender while the sizes of the characters are held invariable, and moreover the sizes of the characters are reduced and at the same time, the lines of the characters are made slender, thereby realizing the power saving promotion.  
      According to the portable electronic apparatus disclosed in the Japanese Patent Kokai No. 2004-178029, however, since the power consumption is reduced by making the display area of the characters smaller, the visibility for the characters during the display in a low voltage phase is reduced. In addition, even when the display of the characters is changed, the same voltage as that in the normal phase is applied to a part of segments. Hence, in particular, in the case of the display panel constituted by an organic EL element, there is encountered such a problem that not only pattern baking of the segments is caused to generate luminance nonuniformity in the display panel, but also a life of the display panel is shortened.  
     SUMMARY OF THE INVENTION  
      In the light of the foregoing, it is an object of the present invention to provide a portable electronic apparatus and a portable music-reproducing apparatus which realize power saving promotion and life prolonging promotion, and which prevent display quality from being deteriorated.  
      In order to attain the above-mentioned object, according to an aspect of the present invention, there is provided a portable electronic apparatus, including: a main body having a displaying portion; a storing portion provided in the main body for storing therein a plurality of power saving modes, at least one of which includes clock display to be displayed on the displaying portion; and a display-controlling portion for, when a given non-externally operating time elapses in a state in which a display image based on a function to be executed in the portable electronic apparatus is displayed on the displaying portion, instructing the displaying portion to perform the clock display containing a non-display state based on one selected among the plurality of power saving modes.  
      In addition, in order to attain the above-mentioned object, according to another aspect of the present invention, there is provided a portable electronic apparatus, including: a main body having a displaying portion including an EL display device; a storing portion provided in the main body for storing therein a plurality of power saving modes, at least one of which includes clock display to be displayed on the displaying portion; and a display-controlling portion for, when a given non-externally operating time elapses in a state in which a display image based on an operation relating to a sound or image to be executed in the portable electronic apparatus is displayed on the displaying portion, instructing the displaying portion to perform the clock display containing a non-display state based on one selected among the plurality of power saving display modes.  
      Also, in order to attain the above-mentioned object, according to still another aspect of the present invention, there is provided a portable music-reproducing apparatus, including: a main body having a displaying portion; a storing portion for storing therein musical data; a reproducing portion for reproducing the musical data stored in the storing portion; a display mode-selecting portion for, when a given non-externally operating time elapses in a state in which a display image relating to music reproduced by the reproducing portion is displayed, selecting one among a first display mode of changing picture display on the displaying portion to clock display to continuously display the clock display, a second display mode of changing the picture display on the displaying portion to the clock display, and after a lapse of a setting time, stopping power supply to the displaying portion to provide a non-display state, and a third display mode of changing the picture display on the displaying portion to the clock display to change luminance of the clock display with a lapse of time; and a display-controlling portion for changing a display content on the displaying portion to another one in accordance with the display mode selected by the display mode-selecting portion.  
      According to the present invention, power saving promotion and life prolonging promotion for the display panel can be realized, and display quality can be prevented from being deteriorated. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view showing a portable electronic apparatus according to an embodiment of the present invention;  
       FIGS. 2A, 2B  and  2 C are respectively a top plan view, a left side elevational view and a bottom view showing respective portions of the portable electronic apparatus according to the embodiment of the present invention;  
       FIG. 3  is a main circuit block diagram of the portable electronic apparatus according to the embodiment of the present invention;  
       FIG. 4  is a structural diagram showing group management in accordance with management data in a display-controlling portion shown in  FIG. 3 ;  
       FIGS. 5A, 5B ,  5 C and  5 D are respectively diagrams showing a top menu display image, an audio menu display picture, an appli menu display image, and a clock display picture as displayed images on an EL-displaying portion, shown in  FIG. 3 , of the portable electronic apparatus according to the embodiment of the present invention;  
       FIGS. 6A, 6B  and  6 C are respectively diagrams of an audio menu display state, a clock display state, and a non-display state, in which the EL-displaying portion shown in  FIG. 3  is in an OFF state, showing a lapse of a first power saving display mode according to the embodiment of the present invention; and  
       FIGS. 7A, 7B ,  7 C and  7 D are respectively diagrams of an audio menu display state, a light clock display state having high luminance, a dark clock display state having low luminance, and a non-display state, in which the EL-displaying portion shown in  FIG. 3  is in an OFF state, showing a lapse of a second power-saving display mode according to the embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
      An embodiment of the present invention will hereinafter be described in detail with reference to the accompanying drawings.  
       FIG. 1  is a perspective view showing a portable electronic apparatus according to an embodiment of the present invention.  FIGS. 2A, 2B  and  2 C are respectively a top plan view, a left side elevational view and a bottom view showing respective portions of the portable electronic apparatus according to the embodiment of the present invention. This portable electronic apparatus  1  is a portable music-reproducing apparatus which can deal with data on pieces of music or recorded sounds (hereinafter referred to as “audio data”) and data on photographs, images or the like (hereinafter referred to as “photo data”).  
      [Construction of Portable Electronic Apparatus 1] 
      The portable electronic apparatus  1  includes a main body  10 , an EL-displaying portion  12  constituted by an EL element and provided in a front face portion  11  of the main body  10 , an operation switch group  13  including operation switches  130 ,  131 ,  132  and  133  with which the various operations of the portable electronic apparatus  1  are performed, a decision switch  14  with which an operation such as execution and decision of a function selected in accordance with an operation therefor is performed, a microphone  15  provided on a lower side of the front face portion  11  for collecting a sound to convert the sound thus collected into an electrical signal, and a power source switch  16  provided on a side face of the main body  10 . Also, the portable electronic apparatus  1  includes a hold switch  17  provided on the side face of the main body  10  for making input operations with the various kinds of switches provided in the main body  10  valid or invalid through the switch operations, an external terminal cover  10 A provided in the side face of the main body  10 , a headphone terminal  18  and a line-in terminal  19  provided in a top face of the main body  10 , a reset switch  21  provided in a left side face of the main body  10  for performing an operation for resetting the portable electronic apparatus  1 , and a strap hole  22  which is provided in a bottom face of the main body  10  and through which a strap is threaded.  
      [Constructions of Portions] 
      The main body  10  is formed in box-like shape by subjecting an ABS resin to in mold forming. The main body  10  accommodates therein a lithium ion battery as a power source, a storing portion constituted by a semiconductor memory for storing therein the audio data having a format such as MP 3  or WAV, and the photo data having a format such as JPEG or BMP, and circuit components for controlling the switches and an I/O terminal portion. In addition, groove portions  11 A and  11 B are provided in cross-like shape on the front face portion  11 . The operation switch group  13  is disposed in an intersection portion between the groove portions  11 A and  11 B. The decision switch  14  is provided on a lower side of the groove portion  11 A with respect to the operation switch group  13 . In the front face portion which is partitioned into four rectangular parts by the groove portions  11 A and  11 B, the four partition areas, and the groove portions  11 A and  11 B are colored with different colors during the in mold forming, respectively. Incidentally, groove portions  11 C and  11 D are provided in cross-like shape on a back face portion  20  as well which is not illustrated in  FIG. 1 . Thus, four partition areas are formed on the back face portion  20  similarly to the front face portion  11 .  
      The EL-lighting portion  12  is constituted by a 1.1 type color organic EL display device. Thus, the EL-lighting portion  12  has a wider angle of field than that of a liquid crystal display (LCD) device having the same size, and is excellent in responsibility of display. A display image size of the EL-lighting portion  12  is 96×96 dots.  
      The operation switch group  13  is formed by disposing the operation switches  130 ,  131 ,  132  and  133  in a cross direction. The operation switches  130 ,  131 ,  132  and  133  are depressed with a finger or the like of a user to be operated. In this embodiment, a function of volume adjustment or the like by the operation switches  130  and  132  is carried out in addition to a function of selecting desired one among items displayed on menu pictures.  
      Input for execution of the functions selected in the menus is carried out in addition to reproduction of the audio data selected in an audio menu which will be described later, and temporary stop of the reproduction with the decision switch  14 .  
      The microphone  15  collects the sound and outputs an analog signal corresponding to the sound thus collected. The audio data is recorded in a storing portion  302  (refer to  FIG. 3 ) in accordance with the resulting analog signal.  
      The portable electronic apparatus  1  is operated from an OFF state to an ON state or from the ON state to the OFF state by depressing the power source switch  16  for a given long period of time.  
      The operations of all the switches provided in the main body  10  are made invalid by depressing the hold switch  17  for a given long period of time. In addition, a hold mode is released with the operations for all the switches made invalid in the hold mode by depressing the hold switch  17  for a given long period of time.  
      The external terminal cover  10 A is made of a resin material having elasticity, and protects moisture and dirt from being stuck to a universal serial bus (CSB) connector through which the data such as the audio data and the photo data is inputted/outputted. At that, the lithium ion battery built in the portable electronic apparatus  1  of this embodiment of the present invention is charged with electricity from a power supplied from an external apparatus (e.g., a personal computer (PC)) connected to the USB terminal through a USB cable or the like.  
       FIG. 3  is a main circuit block diagram of the portable electronic apparatus according to this embodiment of the present invention. At that, the same portions as those described with reference to  FIG. 1  and  FIGS. 2A  to  2 C are designated with the same reference numerals, respectively.  
      A control portion  300  performs a clock function, decode and reproduction of the audio data, file system management for the audio and photo data, reproduction mode setting, equalizer setting during audio data reproduction phase, setting of a power saving display mode which will be described later, and user interface control.  
      An operation portion  301  outputs operation signals corresponding to operations for the switches provided in the main body  10  to the control portion  300 .  
      The storing portion  302  stores therein firmware for operating the portable electronic apparatus  1 , management data required to manage the audio data and the photo data, a program required for the reproduction, a setting program for setting the power saving display mode which will be described later, the audio data and the photo data.  
      A display-controlling portion  303  is systematized with respect to the audio data and the photo data, and menu items (AUDIO, APPLI, and SETTING) relating to the setting of the clock display or the like. The display-controlling portion  303  controls the image display of the EL-displaying portion  12  by referring to the management data stored in the storing portion  302 . At that, the management data has a structure in which each menu item which has been described is further grouped into a plurality of items.  
      A sound-outputting portion  304  receives as its input audio data obtained through decode in the control portion  300  through a bus  309 , converts the audio data thus received into analog data, and outputs the resulting analog data to the headphone terminal  18 . In this case, the control portion  300  operates as a portion for reproducing the audio data.  
      A sound-inputting portion  305  has an encoder for converting an audio signal into audio data having a format with which the audio data can be reproduced by the portable electronic apparatus  1 . Here, the format of the audio data to be reproduced is an MPEG-1 audio layers (MP3) format having a bit rate of 96 to 128 Kbps in (monaural) recording by the microphone  15 , and thus is the MP 3  having a bit rate of 96 to 128 Kbps in direct (stereo) encoding for the audio signal inputted through the line-in terminal  19 . In addition, an audio signal in accordance with an FM broadcasting inputted through an FM tuner portion  307  which will be described later can also be converted into the MP 3  file by the stereo recording having the bit rate of 96 to 128 Kbps.  
      A driving circuit  306  controls driving of the EL-displaying portion  12  by receiving as its input data corresponding to a display picture in accordance with a user operation from the control portion  300  through the bus  309 .  
      An FM tuner portion  307  stereo-receives as its input an FM broadcasting by utilizing a code of a stereo headphone connected to the headphone terminal  18  as an antenna, and outputs the FM broadcasting thus received to the sound-outputting portion  304 . Incidentally, the outputted audio signal can be recorded in the sound- inputting portion  305 .  
      An interface (I/F) portion  308 , when the external apparatus is connected to a USB terminal (not shown) or the like, controls an operation for inputting/outputting one or both of the audio data and the photo data for the bus  309 .  
       FIG. 4  is a structural diagram showing group management in accordance with the management data in the display-controlling portion  303  shown in  FIG. 3 .  
      The display-controlling portion  303  manages the data stored in the storing portion  302  every group. An audio menu  331 , an appli menu  332 , and a setting menu  333  are provided as a low rank group in a top menu  330  provided in the highest rank. Desired one of the audio menu  331 , the appli menu  332 , and the setting menu  333  is selected by operating the operation switch  130 ,  131 ,  132  or  133 , and the decision switch  14  of the operation switch group  13  shown in  FIG. 1  as a display mode-selecting portion.  
      A navi picture  331 A containing therein items  3310  of an artist, an album, a play list, and a book mark is provided in a low rank group of the audio menu  331 . While each of the items  3310  is further classified into a lower rank group, illustration thereof is omitted here.  
      With respect to the group of the audio menu  331 , for the item of the artist, an associating file is displayed in which the audio data is classified every artist. For the item of the album, an associating file is displayed in which the audio data is classified every album. For the item of the play list, an associating file of the title is displayed which is obtained in accordance with a list of musical numbers and the order of pieces of music which the user sets for the audio data. Also, for the item of the book mark, a title of the audio data to which the user gives a book mark is displayed.  
      A navi picture  332 A containing therein items  3320  of a photo, an FM radio, mike recording, line recording, and recorded data is provided in a low rank group of the appli menu  332 . While each of the items  3320  is further classified into a lower rank group, illustration thereof is omitted here.  
      When the user selects the item of the photo with respect to the group of the appli menu  332 , he/she can peruse photo data stored in the storing portion  302 . When the user selects the item of the FM radio, he/she can listen to an FM broadcasting by operating a built-in FM radio. When the user selects the item of the mike recording, he/she can perform monaural recording such as voice recording using the microphone  15 . When the user selects the item of the line recording, it is possible to record an audio signal outputted from an input unit connected to the portable electronic apparatus  1  through the line-in terminal  19 . Also, when the user selects the item of the recording data, it is possible to reproduce the audio data which is recorded by the portable electronic apparatus  1  and is then stored in the storing portion  302 .  
      While the various items relating to the setting for the portable electronic apparatus  1  are contained in a low rank group of the setting menu  333 , only an item  3330  of display is illustrated herein. A display-setting picture  333 B as the setting item in a power saving display mode is contained in the item  3330  of the display.  
      The display-setting picture  333 B roughly contains therein selection items of a normal display mode, and two power saving display modes. In the normal display mode, after a lapse of a given time from the operation picture display or the menu picture display, the picture display on the EL-displaying portion  12  is changed to the clock display.  
      In a first power saving display mode, after a lapse of a given time from the operation picture display or the menu picture display, the picture display on the EL-displaying portion  12  is changed to the clock display, and after a lapse of a setting time, power supply to the EL-displaying portion  12  is stopped to provide a non-display state. In this embodiment,  5  seconds,  10  seconds or  20  seconds can be set as the setting time after the clock display has been made.  
      In addition, in a second power saving display mode, after a lapse of a given time from the operation picture display or the menu picture display, the picture display on the EL-displaying portion  12  is changed to the clock display, and luminance of the clock display is changed with a lapse of time. In this case, in a state of minimum luminance, the power supply to the EL-displaying portion  12  is stopped.  
      The clock display includes a design of a clock exhibiting a time, and an image size and a display pattern with which the user can readily and visually observe a digitally displayed segment in order to principally display a time.  
       FIGS. 5A, 5B ,  5 C and  5 D are respectively diagrams showing a top menu display image, an audio menu display picture, an appli menu display image, and a clock display picture as displayed images on the EL-displaying portion  12  of the portable electronic apparatus  1  according to this embodiment of the present invention.  
      As shown in  FIG. 5A , functions of “AUDIO”, “APPLI”, and “SETTING” which can be executed in the portable electronic apparatus  1  are displayed as an operation display portion  12 A on the top menu display image  120 . Desired one of “AUDIO”, “APPLI”, and “SETTING” is displayed in the form of a high light form by moving a selection display  121  in accordance with the operation for the selection switch described above, and the decision switch  14  is operated, thereby selecting the corresponding desired function. In addition, reproduction state display  122  showing a reproduction state of the audio data, reproduction mode display  123  showing a reproduction mode (repeat) of the audio data, equalizer display  124  showing a mode of an equalizer for adjusting tone quality of the audio data, sleep display  125  showing setting of sleep in which the portable electronic apparatus  1  is shut down at a specified time, hold display  126  showing suitability of a hold mode, and battery display  127  showing a remaining power of the lithium ion battery are displayed in an upper portion of the screen.  
      An audio menu display picture  128  is displayed by selecting “AUDIO” from the top menu display image  120  shown in  FIG. 5A . The above-mentioned operation display portion  12 A, jacket display  128 A corresponding to the audio data, a musical information display image  128 B containing therein an artist name (XXX . . . ), an album name (YYY . . . ), a title (ZZZ . . . ), regeneration time display  129  displayed on a lower side of the screen, and a progress bar  140  showing progress of reproducing the audio data are displayed as shown in  FIG. 5B  in the audio menu display image  128 . It should be noted that the reproduction time display  129  shown herein is different from the clock display stated in this application.  
      An appli display image  141  is displayed by selecting “APPLI” from the top menu display image  120  shown in  FIG. 5A . Items of “PHOTO”, “FM RADIO”, “MIKE RECORDING”, “LINE RECORDING”, and “RECORDED DATA” are selectably displayed as shown in  FIG. 5C  on the appli menu display image  141 .  
      A clock display picture  142  is displayed when a given time has elapsed in a state in which the display image shown in  FIG. 5A, 5B  or  5 C has been displayed. A time is displayed herein in accordance with digital display. In the normal display mode, when the user performs no manual operation in a state in which the clock display image  142  is displayed, the clock display image  142  is displayed at all times. On the other hand, when the user performs the manual operation in the state in which the clock display image  142  is displayed, the display image before the display image is changed to the clock display image  142  is displayed.  
      [Operation in Power Saving Display Mode] 
      Next, power saving display modes of the portable electronic apparatus  1  will be described with reference to  FIGS. 6A  to  6 C, and  FIGS. 7A  to  7 D. The following description is given with respect to a case of proceeding to corresponding one of the power saving display modes in a state in which the audio menu is displayed.  
      [Operation in First Power Saving Display Mode] 
       FIGS. 6A, 6B  and  6 C are respectively diagrams of an audio menu display state, a clock display state, and a non-display state, in which the EL-displaying portion  12  is in an OFF state, showing a lapse of a first power saving display mode.  
      While the audio data shown in  FIG. 6A  is reproduced in a state in which the first power saving display mode is set in advance, after a lapse of a given time which is set as a time required for the proceeding to the clock display from a non-operation state in which a given non-operation time elapses, the control portion  300  instructs the EL-displaying portion  12  to display thereon the clock display picture  142  of the digital clock display shown in  FIG. 6B . Hereinafter, “a given non-operation time” is referred to as “a given non-externally operating time”. Moreover, after a lapse of time (e.g., 5 seconds) set on the display setting picture  333 B described above, the EL-displaying portion  12  is turned OFF by stopping the supply of the power from the driving circuit  306  to the EL-displaying portion  12  to provide a non-display state  143 .  
      Here, when the user manually operates any one of the switches provided in the portable electronic apparatus  1 , or when the user inserts or pulls out a terminal of a device into or from the headphone terminal  18 , the line-in terminal  19  or the like, the supply of the power from the driving circuit  306  to the EL-displaying portion  12  is restarted. As a result, the EL-displaying portion  12  is turned ON again and the clock display image  142  shown in  FIG. 6B  is displayed.  
      In addition, when the user manually operates any one of the switches provided in the portable electronic apparatus  1  in a state in which the clock display picture  142  shown in  FIG. 6B  is displayed, the audio menu display picture  128  shown in  FIG. 6A  is displayed. At that, in the case as well where no audio data is reproduced, the same processing as that in the foregoing is executed.  
      [Operation in Second Power Saving Display Mode] 
       FIGS. 7A, 7B ,  7 C and  7 D are respectively diagrams of an audio menu display state, a light clock display state having high luminance, a dark clock display state having low luminance, and a non-display state, in which the EL- displaying portion  12  is in an OFF state, showing a lapse of a second power saving display mode.  
      While the audio data shown in  FIG. 7A  is reproduced in a state in which the second power saving display mode is set in advance, after a lapse of a given time which is set as a time required for the proceeding from the non-manually operating state to the clock display, the control portion  300  instructs the EL-displaying portion  12  to display thereon the clock display picture  142  of the digital clock display shown in  FIG. 7B . The operation until now is the same as that in the first power saving display mode.  
      Next, after a lapse of the time (e.g., 5 seconds) which is set on the display setting picture  333 B described above, the supply of the power from the driving circuit  306  to the EL-displaying portion  12  changes with time. In accordance with this change in power supply, the luminance of the EL-displaying portion  12  changes. A clock display picture  142 A shown in  FIG. 7C  shows a state in which the luminance is reduced. For this reason, the clock display on the EL-displaying portion  12  is performed by periodically repeating the luminance change of FIGS.  7 B→ FIG. 7C → FIG. 7D → FIG. 7C → FIG. 7B .  
      Here, when the user manually operates any one of the switches provided in the portable electronic apparatus  1 , or when the user inserts or pulls out a terminal of a device into or from the headphone terminal  18 , the line-in terminal  19  or the like, the audio menu display picture  128  shown in  FIG. 7A  is displayed. At that, in the case as well where no audio data is reproduced, the same processing as that in the foregoing is executed.  
      At that, as an exception of the case where the above-mentioned power saving display modes are set, the operation does not proceed to any one of the power saving display modes since while the recording operation is executed and while slide show of the photo data is executed, the processing to any of the power saving display modes impedes the functions which are being executed.  
      According to the embodiment described above, the clock display can be performed while the power saving promotion for the portable electronic apparatus  1  is realized. As a result, the portable electronic apparatus  1  can be given an added value without impairing any of the main functions thereof. In addition, even when the EL-displaying portion  12  is in the OFF state, the picture display is returned back to the clock display by manually operating corresponding one of the switches. Moreover, the picture is returned back to the operation picture for AUDIO or the like by manually operating corresponding another one of the switches. As a result, no complicated operation is required.  
      The display picture required for the manual operation is displayed, and in the state of requiring no manual operation, the EL-displaying portion  12  is instructed to display thereon the clock display or is turned OFF. Therefore, the continuous turn-ON time of the EL-displaying portion  12  is shortened to suppress the heat generation. As a result, the life prolonging promotion for the EL-displaying portion  12  is realized. In addition, the reduction in luminance of the EL-displaying portion  12  caused by the generation of the baking of the image on the EL-displaying portion  12  can be prevented for a long term.  
      Since there is provided the color organic EL-displaying portion  12  having a wider angle of field than that of the liquid crystal display device having the same size, even when the luminance of the clock display continuously changes in the second power saving display mode, the clock display can be visually observed in a wide range. In the second power saving display mode, a time can be confirmed without requiring the manual operation for the clock display. In addition, the reduction of the luminance is effective in suppression of the heat generation and the image baking. Thus, it is possible to obtain the portable electronic apparatus  1  having the EL-displaying portion  12  which is excellent in the power saving property with a small load while the novelty of the clock display is added thereto.  
      It should be noted that the present invention is not limited to the above-mentioned embodiment, and the various modifications can be made without departing from or changing the technical idea of the present invention. The portable electronic apparatus  1  is not also limited to the above-mentioned portable music-reproducing apparatus, and thus may be any other suitable electronic apparatus such as a mobile phone.