Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JP2005311501 PROBLEM TO BE SOLVED: To improve the quality of sound during music reproduction in a portable terminal device. SOLUTION: In the case of a portable terminal apparatus having a structure in which a display unit 4 is provided at the upper part of the case surface and various operation keys 7 to 15 and 19 are arranged at the lower part of the case surface, provided in the lower part of the case surface. By arranging a plurality of speakers 16 and 17 in two sets on both sides of the same housing surface with the frequently used four-way key 19 interposed therebetween, the user can use four directions when using the portable terminal device. Music generated by the speakers 16 and 17 recognized by the user by the isolation of the sound from the speakers 16 and 17 by the fingers by utilizing the possibility that the finger 19 is placed on the key 19 Improve stereo effects and surround effects. [Selected figure] Figure 1 Mobile terminal device [0001] The present invention relates to a portable terminal device capable of realizing high quality sound at the time of music reproduction. [0002] Conventionally, in portable terminal devices such as mobile phones, PHS (Personal Handyphone System), PDA (Personal Data Assistance, Personal Data Assistants: personal information communication devices for personal use), electronic sound is generally used for call notification. A method of transmitting from a speaker is used. 10-05-2019 1 Also, in many cases, it has a music playback function, and means for notifying by playing music is also used. Furthermore, in the application such as a game on the portable terminal device, higher quality content is realized by the screen display on the liquid crystal display unit and the music emitted from the speaker. As the music reproduction function of such a portable terminal device, by mounting a plurality of speakers, it is possible to realize the spread of the sound by the stereo effect, and by providing the surround function, a higher quality notification Methods of implementing the means are also used. [0003] Many portable terminal devices are assumed to be carried at all times, and therefore, many are miniaturized so as to be convenient for carrying, and therefore, the position where a built-in speaker can be incorporated is limited. Therefore, in order to enable further miniaturization, a speaker for music reproduction is often disposed at a position different from the key operation surface. For example, there are cases where the speaker is mounted on the side opposite to the key button arrangement side which is the operation side, but since the sound is transmitted from the back of the device, the distance from the sound source makes When performing the operation, the result is that the surround effect of the music is reduced. In this case, although the stereo effect and the surround effect occur in proportion to the isolation based on the distance between the speakers, a small shield (for example, a finger or the like) can not be obtained due to the miniaturization. By placing the speaker between the speakers, the stereo effect and the surround effect were in a state of rising, but no means for actively using such an effect has been taken. [0004] As described above, in the conventional portable terminal device, there is a problem that the stereo effect and the surround effect can not be surely obtained because the distance between the plurality of speakers can not be sufficiently long. The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a portable terminal device capable of improving the stereo effect and surround effect of music generated during operation. [0005] 10-05-2019 2 In order to solve the above-mentioned problems, the invention according to claim 1 relates to a portable terminal device, in a portable terminal device having a function of reproducing music as stereo sound and / or surround sound, in the housing surface of the portable terminal device A plurality of speakers are divided into two sets on both sides of the same housing surface with a portion where the user is likely to put a finger when using the portable terminal device, and the above two sets of speakers are respectively provided. It is characterized in that it is configured to be driven by a stereo sound signal or a surround sound signal. [0006] The invention according to claim 2 relates to the portable terminal device according to claim 1, wherein the portable terminal device has a display unit on one side of the casing surface, and the user on the other side of the casing surface The present invention is characterized in that the above two sets of speakers are disposed separately on both sides of the same housing surface with a portion likely to be mounted therebetween. [0007] The invention according to claim 3 relates to the portable terminal device according to claim 1, wherein the portable terminal device has an upper case provided with a display unit on the case surface, and various operation keys arranged on the case surface. A portable telephone configured to be foldable so that the two housing surfaces face each other via a hinge part, wherein a portion of the lower housing surface on which the user is likely to place a finger is The above two sets of speakers are disposed on both sides of the same housing surface by being sandwiched therebetween. [0008] The invention according to claim 4 relates to the portable terminal device according to any one of claims 1 to 3, characterized in that the portion where the finger is likely to be placed is the upper surface of the key which is frequently used. And [0009] The invention according to claim 5 relates to the portable terminal device according to claim 4, wherein the frequently used key is a four-way key. [0010] The invention according to claim 6 relates to the portable terminal device according to any one of claims 1 to 5, wherein the stereo sound signal is generated by converting data held in the 10-05-2019 3 storage means in the music reproduction means. According to the music data of stereo sound, the music output means is converted to an analog signal and generated. [0011] The invention according to claim 7 relates to the portable terminal device according to any one of claims 1 to 6, wherein the surround sound signal is a music coefficient and surround coefficient means for music data of the stereo sound. Through control of the respective phases and amplitudes of the music data of the stereo sound, and conversion into an analog signal. [0012] The invention according to claim 8 relates to the portable terminal device according to claim 7, wherein the surround coefficient means adjusts first and third phases of one of the music data of the stereo sound and the third phase, respectively. · Amplitude adjusting means, second and fourth phase / amplitude adjusting means for adjusting the other phase and amplitude of the other music data of the stereo sound, and outputs of the first to fourth phase / amplitude adjusting means First to fourth D / A converting means for converting into an analog signal, first combining means for combining the outputs of the first and second D / A converting means, and the third and fourth D for converting Second combining means for combining the output of the A / A conversion means, and first for generating a first surround sound signal for driving the first set of speakers by amplifying the output of the first combining means Speaker driving means, and the above second composition It is characterized by and a second loudspeaker drive means for generating a second surround sound signals for driving the second set of speakers by amplifying the output of the stage. [0013] The invention according to claim 9 relates to the portable terminal device according to claim 8, wherein the stereo sound signal deactivates the first to fourth phase / amplitude adjusting means in the surround coefficient means. The present invention is characterized in that the first phase / amplitude adjusting means is bypassed by the first bypass means, and the fourth phase / amplitude adjusting means is bypassed and generated by the second bypass means. [0014] In the mobile terminal device of the present invention, the speaker is disposed on both sides of the same housing surface with the key frequently operated in between, on the housing surface, so that the user places a finger on the key for the operation. In this case, the user can listen to music, and the user's finger acts as a shield to enhance the isolation between the two speakers and to improve the stereo effect and surround effect of the sound transmitted from both 10-05-2019 4 speakers. Can. [0015] In a portable terminal device having a function of reproducing music as stereo sound and / or surround sound, the same housing is provided on the housing surface thereof with a portion where the user is likely to place a finger when using the mobile terminal device. A plurality of speakers are arranged in two sets on both sides of the body surface, and the two sets of speakers are driven to output stereo sound or surround sound, respectively. [0016] FIG. 1 is a view showing an appearance configuration of a mobile phone which is an embodiment of a mobile terminal device of the present invention, FIG. 2 is a circuit diagram showing a configuration of main parts of the mobile terminal device of this embodiment, and FIG. FIG. 4 is a diagram showing a circuit configuration of a music output unit in the portable terminal device of the present embodiment, and FIG. 4 is a view for explaining generation of stereo sound and surround sound in the portable terminal device of the present embodiment. [0017] As shown in FIG. 1, the mobile terminal device of this example mechanically couples the upper case 1, the lower case 2, the upper case 1 and the lower case 2, and the upper case 1 and the lower case 2. It is roughly comprised from the hinge part 3 for making an electrical connection between the lower housing ¦ casing 2 and. [0018] The upper case 1 has a display unit 4 provided with a monochrome or color liquid crystal panel or an organic EL (Electronic Luminescence) panel for displaying various information on the front of the case, and for listening to received voice. Upper receiver 5 and lower receiver 6 are provided. In the lower case 2, an Internet mode button 7 for selecting the operation state in the Internet mode, and a menu button 8 for displaying and selecting various operation functions are selected on the front of the case. The decision key 9 for deciding various operation modes, the mail button 10 for selecting the mail text creation mode, etc., the telephone directory button 11 for reading out the registered telephone number, and the designated operation state Start key 12 for starting 10-05-2019 5 the operation, the clear key 13 for canceling the designated operation state, the end key 14 for ending the transmission and reception, and the numbers 0 to enter the telephone number and the mail text. 9 and a numeric keypad 15 consisting of symbols # and *, a left speaker 16 and a right speaker 17 for transmitting reproduced music, and a microphone for inputting voice 8, the four-direction key 19 for performing operation and the like on the screen during scrolling and game operation items on the screen are provided. The left speaker 16 and the right speaker 17 are disposed separately on the lower housing surface on the left and right with the four-way key 19 interposed therebetween. At the time of folding, the mobile terminal device of this example has a structure in which the upper case 1 and the lower case 2 are folded by the hinge portion 3 so that the front surfaces thereof face each other. [0019] Moreover, as shown in FIG. 2, the electrical configuration of the main part in the portable terminal device of this example is the display unit 4, the left speaker 16, the right speaker 17, the control unit 21, the transmission / reception unit 22, and storage A section 23, a music reproduction section 24, a music output section 25 and a key input section 26 are schematically configured. Among these, the display unit 4, the left speaker 16, and the right speaker 17 are the same as those shown in FIG. [0020] The control unit 21 includes a CPU (Central Processing Unit), controls the entire operation of the mobile terminal device, converts transmission voice from the microphone 18 into digitized transmission data, and supplies the transmission data to the transmission / reception unit 22. It performs processing such as converting the digitized reception data from the transmission / reception unit 22 into an analog signal and supplying it to the receivers 5 and 6, and further performs control such as reading data stored in the storage unit 23. 10-05-2019 6 The transmission / reception unit 22 converts the transmission data output from the control unit 21 into a radio signal and supplies the radio signal to an antenna (not shown), converts the radio signal input from the antenna into reception data, and transmits the reception data to the control unit 21 . The storage unit 23 includes a ROM (Read Only Memory), and stores data such as music in advance. The music reproduction unit 24 converts the data input from the control unit 21 through the music output unit 25 into music data, and outputs the data as stereo data of equal phase and equal amplitude, for example. The music output unit 25 drives the left speaker 16 and the right speaker 17 by the stereo data input from the music reproduction unit 24 or by the surround data generated from the stereo data. The key input unit 26 generates an output for controlling the operation of the music output unit 25 in accordance with the operation of the key on the housing surface. [0021] The configuration of the music output unit 25 in this example is, as shown in FIG. 3, a left speaker 16, a right speaker 17, phase / amplitude control circuits 31 to 34, and digital / analog (D / A) conversion circuits 35 to 38. And synthesis circuits 39 and 40, speaker driving circuits 41 and 42, a key input circuit 43, and bypass circuits 44 and 45. Among these, the speakers 16 and 17 are the same as those shown in FIG. [0022] The phase / amplitude adjustment circuits 31 and 33 receive one stereo data input M1 from the 10-05-2019 7 music reproduction unit 24, adjust the phase and amplitude thereof, and output the result. The phase / amplitude adjustment circuits 32, 34 receive the other stereo data input M2 from the music reproduction unit 24, adjust their phases and amplitudes, and output them. The D / A conversion circuits 35 to 38 convert the digital sound signals from the phase / amplitude adjustment circuits 31 to 34 into analog sound signals and output the analog sound signals. The combining circuit 39 combines and outputs the output signals of the D / A converting circuits 35 and 36, and the combining circuit 40 combines and outputs the output signals of the D / A converting circuits 37 and 38. The speaker drive circuits 41 and 42 amplify the outputs of the synthesis circuits 39 and 40, respectively, and supply them to the left speaker 16 and the right speaker 17, respectively. The key input circuit 43 generates an output for controlling the operating states of the phase / amplitude adjusting circuits 31 to 34 and the bypass circuits 44 and 45 in accordance with the output from the key input unit 26. The bypass circuits 44 and 45 bypass between the input and output of the phase / amplitude adjustment circuits 31 and 34, respectively. [0023] FIG. 4 illustrates generation of stereo sound and surround sound in the mobile terminal device of this example. Hereinafter, with reference to FIGS. 1 to 4, the operation at the time of stereo sound generation will be described. In the portable terminal device of this example, when it is intended to generate music consisting of a ringing tone, a sound effect melody at the time of game operation, etc. by stereo sound, the display unit is pressed by pressing the menu button 8 on the front of the case. Since various operation modes are displayed on the display screen 4, for example, the four-way key 19 is operated to select the stereo sound mode on the display screen, and the determination key 9 is pressed to confirm this selected state. The key input unit 26 receives the selected state and controls the key input circuit 43, whereby the key input circuit 43 generates an output to disable the phase / amplitude adjustment circuits 31 to 34, The bypass circuits 44 and 45 are put into operation. [0024] 10-05-2019 8 In this state, when data of a specific music is read out from the storage unit 23 based on, for example, detection of an incoming call or the operation of the control unit 21 accompanying the progress of the game, the control unit 21 transmits this data via the music output unit 25. To the music reproduction unit 24. The music reproduction unit 24 generates music data M1 and M2 of stereo sound from the input data and returns the music data to the music output unit 25. The music output unit 25 inputs the music data M1 and M2 to the D / A conversion circuits 35 and 38 through the bypass circuits 44 and 45, respectively, and thereby outputs an analog signal from the D / A conversion circuits 35 and 38. S1 and S2 are sent out. The output S1 is amplified through the synthesizing circuit 39 and the speaker driving circuit 41 and supplied to the left speaker 16, and the output S2 is amplified through the synthesizing circuit 40 and the speaker driving circuit 42 and supplied to the right speaker 17. As a result, the sounds P1 and P2 sent from the speakers 16 and 17 are transmitted to the left ear 51 and the right ear 52, respectively, and are spatially synthesized and recognized as a melody sound having a stereo effect by the user 53. Ru. [0025] Further, in the portable terminal device of this example, when it is intended to generate music consisting of ringing tones, sound effects during game operation, etc. by surround sound, the menu buttons 8 and 4 are used as in the case of stereo operation. The surround sound mode is selected on the display screen by the operation with the direction key 19, and the determination key 9 is depressed to confirm the selected state. The key input unit 26 receives the selected state and controls the key input circuit 43, whereby the key input circuit 43 generates an output to activate the phase / amplitude adjustment circuits 31 to 34 and bypass the operation. Circuits 44 and 45 are disabled. [0026] In this state, when data of a specific music is read out from the storage unit 23 based on, for example, the operation of the control unit 21 associated with the detection of an incoming call or the progress of the game, the music reproduction unit 24 similarly to the stereo operation. Music data M1 and M2 of stereo sound are input to the music output unit 25. In the music output unit 25, the phase / amplitude adjusting circuits 31 and 33 adjust and output the phase and amplitude of the music data M1, and the phase and amplitude adjusting circuits 32 and 34 adjust and output the phase and amplitude of the music data M2 Do. The D / A conversion circuits 35, 36 D / A convert the outputs of the phase / amplitude adjustment circuits 31, 32 to generate 10-05-2019 9 outputs S1, S4 consisting of analog signals, and the D / A conversion circuits 37, 38 have phases The outputs of the amplitude adjustment circuits 33 and 34 are D / A converted to generate outputs S3 and S2 formed of analog signals. [0027] The synthesis circuit 39 synthesizes the outputs S1 and S4 from the D / A conversion circuits 35 and 36 to generate an output (S1 + S4), and the speaker drive circuit 41 amplifies the output (S1 + S4) and supplies it to the left speaker 16 Therefore, the sound P1 based on S1 and the sound P4 based on S4 are sent out from the left speaker 16 into space. The synthesizing circuit 40 synthesizes the outputs S2 and S3 from the D / A converting circuits 37 and 38 to generate an output (S2 + S3), and the speaker driving circuit 42 amplifies the output (S2 + S3) to generate a right speaker 17 Since the sound is supplied, the sound P2 based on S2 and the sound P3 based on S3 are sent out to space from the right speaker 17. As a result, the sound P1 sent from the left speaker 16 and the sound P3 sent from the right speaker 17 are spatially synthesized and transmitted to the left ear 51, and the sound P4 sent from the left speaker 16 and the right speaker 17 Since the sound P2 transmitted from the terminal is spatially synthesized and transmitted to the right ear 52, the user 53 uses the sound from the left ear 51 (P1 + P3) and the sound from the right ear 5 (P2 + P4). Recognize music with surround effects. [0028] As shown in FIG. 4, the sound transmitted from the left speaker 16 and the right speaker 17 propagates in the space to reach both ears of the user 53. At this time, the sound transmitted from both the speakers 16 and 17 The path through which the sound reaches the user's left ear 51 and the right ear 52 is, for example, P1 and P3 for the left ear 51 as shown schematically in FIG. In contrast, the sound heard by the user 53 with the left ear 51 and the sound heard with the right ear 52 are shown by the difference between the phase and the amplitude of the sound in each case by passing through paths such as P2 and P4. As a result, the user 53 hears a sound with a surround effect. [0029] Under the present circumstances, when the position of both speakers 16 and 17 approaches and the phase difference and the amplitude difference of sound P1 and P3 are small, it becomes difficult for a user to recognize a surround effect. 10-05-2019 10 The same applies to the sounds P2 and P4. However, if there is a shield between the two speakers 16 and 17, the phase difference and the amplitude difference become large, and the surround effect is enhanced. Therefore, by arranging the four-way key 19 in the middle of both the speakers 16 and 17 and creating a situation where the user always puts a finger on it in use, the space between both the speakers 16 and 17 is created. Isolation is enhanced, the phase difference / amplitude difference of the sounds P1 and P3 becomes clear, and it becomes easy to confirm the surround effect. The same applies to the sounds P2 and P4. [0030] As described above, in the portable terminal device of this example, the music having the stereo effect and the music having the surround effect are selected and listened to by the monaural music data based on the data held in advance in the storage unit 23. Can. Such stereo effects and surround effects are generated in proportion to the isolation based on the distance between the left speaker 16 and the right speaker 17 as described above, but in the portable terminal device of this example, the left Since the speaker 16 and the right speaker 17 are separately disposed left and right on the housing panel surface with the four-way key 19 interposed between both the speakers, the user can display the display unit 4 when using the portable terminal device. When operating the four-way key 19 while looking, the user's finger placed on the four-way key 19 serves as a shield and the isolation between the two speakers 16 and 17 is enhanced. , The phase difference / amplitude difference of the sounds P1 and P3 with respect to the left ear 51 and the phase difference / amplitude difference of the sounds P2 and P4 with respect to the right ear 52 are respectively clear, and stereo is more effectively performed. It can be obtained fruit and surround effect. [0031] The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and changes in design etc. may be made without departing from the scope of the present invention. Included in the invention. For example, in the embodiment, a foldable mobile phone has been described as an example of a mobile terminal device, but the present invention is not limited to this case, and it is possible that the key arrangement unit and the speaker unit are on the same housing surface. For example, it is applicable irrespective of the shape structure of a portable terminal device. In this case, it is preferable to arrange the display unit on one of the housing surfaces and a portion having a high possibility of placing a finger on the other. Further, in the case of the present 10-05-2019 11 invention, it is necessary that a portion having a high possibility that the user puts a finger on the mobile terminal device is present between the left speaker and the right speaker. For example, the upper surface of a key frequently used when using a portable terminal device, such as a fourway key, is an example in this case, but not limited to this case, it is a structure other than other keys or keys. May be Also, the number of speakers is not limited to two, and an arbitrary plural number of speakers may be divided into two sets and arranged on both sides of a portion where a finger is likely to be placed on the same housing surface. [0032] The present invention is not limited to existing portable terminal devices such as portable telephones, PHSs, PDAs, etc., and can be used in various small-sized portable information communication devices having a music reproduction function that may appear in the future. . [0033] It is a figure which shows the external appearance structure of the mobile telephone which is one Example of the portable terminal device of this invention. It is a circuit diagram which shows the structure of the principal part of the portable terminal device of the Example. It is a figure which shows the circuit structure of the music output part in the portable terminal device of the Example. It is a figure for demonstrating the production ¦ generation of the stereo sound in the portable terminal device of the Example, and a surround sound. Explanation of sign [0034] DESCRIPTION OF SYMBOLS 4 display part 16 left speaker 17 right speaker 19 four-way key 21 control part 22 transmission / reception part 23 memory ¦ storage part (storage means) 24 music reproduction part (music reproduction means) 25 music output part (music output means) 26 key input part 31- 34 Phase and amplitude adjustment circuit (phase and amplitude adjustment means) (surround coefficient means) 35 to 38 D / A conversion circuit (D / A conversion means) (surround coefficient means) 39, 40 synthesis circuit (composition means) (surround coefficient) Means) 41, 42 Speaker drive circuit (speaker drive means) (surround coefficient means) 43 Key input circuit 44, 45 bypass circuit (bypass means) 10-05-2019 12 10-05-2019 13
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