JP3751895B2 - Mobile phone - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile phone, and more particularly, to a mobile phone in which a casing provided with an operation unit is exposed from a state covered with another casing when in use.
[0002]
[Prior art]
In conventional car phones, when using the handset as a cordless mobile phone not only in a car but also outdoors, it is necessary to grab the back side for dial key in, then change it for a call, In order to improve the inconvenience of having to make a call and changing the handset, there is known a cellular phone in which a receiving unit sound hole and a microphone sound hole are provided on both the ventral side and the back side of the handset. (Japanese Patent Laid-Open No. 3-201753: name of invention “double-sided handset”).
[0003]
In this conventional cellular phone, by providing a pair of receiver unit sound holes and a pair of microphone sound holes at the same position on the belly side and back side of the handset of the phone, either side of the belly side or back side is provided. Calls can also be made from.
[0004]
[Problems to be solved by the invention]
However, the ends of the lower housing part with the operation unit and the transmitter provided on the inner surface and the upper housing part with the display unit and the handset provided on the inner surface are rotatably coupled by a hinge. When the above-described conventional configuration is applied to a foldable mobile phone that is in a closed state in which inner surfaces are closely opposed to each other when not in use and in an open state in which the inner surfaces are separated from each other when in use In the closed state, there is a problem that the call cannot be made because the reception sound hole and the transmission sound hole are located on the back of each other. In addition, since the back side of the reception sound hole is set as the transmission sound hole, it may be easy to make a call when the closed state is changed to the open state, and the above-described conventional configuration cannot be applied.
[0005]
The present invention has been made in view of the above points, and even when the operation unit is housed in the housing (closed state), a call can be made in the same manner as when the operation unit is exposed from the housing (open state). An object of the present invention is to provide a mobile phone that can be used.
[0006]
Another object of the present invention is to provide a mobile phone that does not have a sense of incongruity between a closed state and an open state.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided an end portion of each of a lower housing portion having at least an operation portion provided on an inner surface and an upper housing portion having at least a display portion provided on an inner surface. Is a foldable mobile phone in which the inner surface is in a closed state in which the inner surfaces are closely opposed to each other and an open state in which the inner surfaces are separated from each other. A transmitter provided on one inner surface of the lower housing portion and the upper housing portion, and a transmitter / receiver provided on the other inner surface of the lower housing portion and the upper housing portion, It is configured to have a transmission sound hole provided on the outer surface of the other casing portion so as to communicate with the speaker / receiver and a receiver provided on the outer surface of the other casing portion.
[0013]
In the present invention, when the microphone is in the open state, the microphone / receiver can be used as a receiver and the telephone can be used for communication, and when the microphone is in the closed state, the microphone / receiver can be communicated via the microphone hole. It can be used as a telephone and can talk using a handset.
[0014]
In order to achieve the above object, the second invention provides an open / close detection means for detecting whether the signal is in an open state or a closed state, and a predetermined frequency characteristic corresponding to the reception characteristic of the transmitter / receiver in the reception voice signal. A first receiver circuit that is provided and supplied to the receiver for both the transmitter and the receiver voice signal having a frequency characteristic that is substantially the same as the received voice signal supplied to the receiver for the transmitter according to the frequency characteristic of the receiver. And a second receiving circuit that is supplied to the receiver and when an open state detection signal is output from the open / close detection means, a received voice signal is supplied to the first receiving circuit, and the output of the first receiving circuit It is configured to have a receiver selection means for supplying a reception voice signal to a transmitter / receiver and supplying a reception voice signal to a second reception circuit when a closed state detection signal is output from the open / close detection means. is there.
[0015]
In the present invention, according to the frequency characteristics of the handset used in the closed state, the frequency characteristics that are substantially the same as the received voice signal supplied to the handset used as the handset in the open state are Since the receiver circuit 2 adds the received voice signal to the receiver and supplies it to the receiver, the receiver voice used from the receiver in the closed state, and the transmitter / receiver used as the receiver in the open state are used. The received voice from can have the same characteristics.
[0016]
In order to achieve the above object, a third invention provides a first transmitter circuit for giving a predetermined frequency characteristic corresponding to a frequency characteristic of a transmitter to a transmitted voice signal, and a receiver also serving as a transmitter. A second transmission that adds to the transmission voice signal from the transmitter / receiver a frequency characteristic having substantially the same frequency characteristic as the transmission voice signal output from the first transmission circuit in accordance with the transmission characteristic of the first transmission circuit. When the open state detection signal is output from the circuit and the open / close detection means, the output transmission voice signal of the first transmission circuit is supplied to the wireless transmission means for transmission, and the open state detection signal is output from the open / close detection means When transmitting, the transmission voice signal from the transmitter / receiver is supplied to the second transmission circuit, and the output transmission voice signal of the second transmission circuit is supplied to the wireless transmission means for transmission. And a speaker selection means.
[0017]
In this invention, the transmission voice signal from the transmitter / receiver used as the transmitter in the closed state is approximately the same frequency as the transmission voice signal from the transmitter used in the open state. Therefore, it is possible to wirelessly transmit a transmission voice signal having the same characteristics regardless of which of the transmitter and the transmitter / receiver is used.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 (A), (B), (C) and (D) are an open perspective view, a closed perspective view, a schematic longitudinal side view, and a main configuration diagram of an embodiment of a mobile phone according to the present invention. Indicates. The mobile phone according to the present embodiment is a foldable mobile phone, and as shown in FIG. 1 (A), the end portions of the lower housing portion 1 and the upper housing portion 2 are rotatable by hinges 3. The key operation unit 4 and the transmitter 5 are provided on the inner side surface of the lower casing unit, and the liquid crystal display unit 6 and the receiver unit 7 are provided on the inner side surface of the upper casing unit 2. An antenna 8 is provided at the end of the upper housing 2 opposite to the hinge 3.
[0021]
When the foldable mobile phone of this embodiment is used, as shown in FIG. 1 (A), the inner surfaces of the lower casing portion 1 and the upper casing portion 2 are opened to be separated from each other. The Further, at the time of carrying or the like, as shown in FIG. 1B, the inner surfaces of the lower housing 1 and the upper housing 2 are in a closed state (folded state) in close contact with each other.
[0022]
Further, in the present embodiment, as shown in FIG. 1B, a second transmitter 9 is provided on the antenna 8 side portion of the outer side surface (rear surface) of the upper housing portion 2, and the hinge 3 side. The part is provided with a second handset 10. Furthermore, in the present embodiment, as shown in FIG. 1C, a magnet 11 is embedded in the upper casing 2 and a Hall IC 12 is embedded in the lower casing 1, and these are shown in FIG. As shown in (D), it is disposed at a position just opposite in the folded state.
[0023]
As shown in FIG. 1D, the Hall IC 12 is connected to the Hall IC output detection circuit 13 in the lower housing part 1. The Hall IC 12 is an integrated circuit that outputs different logic values depending on the presence or absence of magnetic flux. For example, as shown in FIG. 1D, the magnet 11 is closest to the Hall IC 12 in the folded state (closed state). Therefore, the Hall IC 12 detects the magnetic flux of the magnet 11 and outputs, for example, logic “L”. On the other hand, when opened, the magnet 11 is far from the Hall IC 12 as shown in FIG. Therefore, the Hall IC 12 detects a magnetic flux and outputs a logic “H” at this time. The Hall IC output detection circuit 13 outputs a closed state detection signal when the logic output of the Hall IC 12 is “L”, and outputs an open state detection signal when it is “H”.
[0024]
FIG. 2 shows a block diagram of an embodiment of a mobile phone according to the present invention. In the figure, the same components as in FIG. In FIG. 2, the mobile phone includes an antenna 8 and a radio unit 15 for wireless connection to a base station (not shown), a receiver selection circuit 16 and a transmitter selection circuit 17 connected to the radio unit 15, and an open / close detection circuit 18. Receiving circuits 19 and 20 connected to the receivers 7 and 10, and transmitting circuits 21 and 22 connected to the transmitters 5 and 9.
[0025]
The radio unit 15 modulates a transmission signal into a radio band during transmission to the base station, and demodulates the reception signal into a voice band during reception. The received audio signal demodulated by the radio unit 15 is input to the receiver selection circuit 16. The transmitted voice signal from the transmitter selection circuit 17 is input to the radio unit 15, modulated, converted into a radio band, and transmitted to the base station.
[0026]
The open / close detection circuit 18 includes the magnet 11, the Hall IC 12 and the Hall IC output detection circuit 13 shown in FIGS. 1C and 1D. The detection signal is sent to the handset selection circuit 16 and the handset selection circuit 17. Are supplied as selection signals to selectively control them.
[0027]
Next, the operation of the present embodiment will be described. First, an operation in a case where a call is made in the open state illustrated in FIG. In FIG. 2, when the open state is detected, the receiver selection circuit 16 is connected to the input terminal of the receiver circuit 19 and the transmitter selection circuit 17 is connected to the output terminal of the transmitter circuit 21 by a detection signal from the open / close detection circuit 18. Connected to. As a result, a signal from the other party transmitted from a base station (not shown) is received by the antenna 8 and demodulated into a received voice signal by the radio unit 15, and then supplied to the receiver circuit 19 by the receiver selection circuit 16 and amplified. Further, the receiver 7 performs electro-acoustic conversion to generate a received voice.
[0028]
On the other hand, the user's transmitted voice is acoustic-electrically converted by the transmitter 5, converted into an audio signal, and given a predetermined frequency characteristic by the transmitter circuit 21, and then passed through the transmitter selection circuit 17. The signal is supplied to the wireless unit 15, modulated there, converted into a predetermined wireless band, and wirelessly transmitted from the antenna 8 to the base station.
[0029]
Next, an operation in a case where a call is made in the closed state illustrated in FIG. 1B will be described. In FIG. 2, when the closed state is detected, the receiver selection circuit 16 is connected to the input terminal of the receiver circuit 20 and the transmitter selection circuit 17 is connected to the output terminal of the transmitter circuit 22 by a detection signal from the open / close detection circuit 18. Connected to. As a result, the signal from the other party transmitted from a base station (not shown) is received by the antenna 8 and demodulated into a received voice signal by the radio unit 15, and then supplied to the receiver circuit 20 by the receiver selection circuit 16 and amplified. Furthermore, the receiver 10 performs electro-acoustic conversion to generate a received voice.
[0030]
On the other hand, the user's transmitted voice is acoustic-electrically converted by the transmitter 9, converted into an audio signal, and given a predetermined frequency characteristic by the transmitter circuit 22, and then passed through the transmitter selection circuit 17. The signal is supplied to the wireless unit 15, modulated there, converted into a predetermined wireless band, and wirelessly transmitted from the antenna 8 to the base station. In this way, in the present embodiment, it is possible to talk with the other party even in the closed state, as well as being able to talk with the other party in the open state as in the prior art.
[0031]
Here, the handset 7 and the handset 10 have different mounting positions as shown in FIG. 1, but also have different mounting spaces, so that the frequency characteristics of each handset are different. Is different. Therefore, in order not to give the user a sense of incongruity during a call, it is necessary to match the audible characteristics of the receiver 7 and the receiver 10, and the function of the receiver circuits 19 and 20 is to perform this correction electrically. .
[0032]
FIG. 3A shows an example of frequency characteristics of the receiver 7. As shown in FIG. 4A, the frequency characteristic of the receiver circuit 19 is a substantially flat amplification characteristic, so that the listening frequency characteristic of the receiver 7 is almost the same as that shown in FIG. On the other hand, the frequency characteristic of the receiver 10 is shown in FIG. 3B, for example, and is different from the frequency characteristic of the receiver 7 shown in FIG. Therefore, in the present embodiment, the frequency characteristics of the receiver circuit 20 are set as shown in FIG. As a result, the synthesized frequency characteristics of the receiver circuit 20 and the receiver 10 are almost the same as the frequency characteristics shown in FIG. 3A, so that the sound received by the receiver 10 is audibly identical to the sound received by the receiver 7. Can be made.
[0033]
Next, the difference between the transmitter 5 and the transmitter 9 will be described. Since the distance between the transmitter 5 and the transmitter 9 is different from the user's mouth during a call, the volume of the transmitted voice is different. That is, in the open state of the folding cellular phone, the transmitter 5 is close to the mouth, but in the closed state, the user brings the handset 10 to the ear, so the transmitter 9 is separated from the mouth. Therefore, the transmitter 5 has a high transmission voice, and the transmitter 9 has a low transmission voice. The transmission circuits 21 and 22 correct this, and the gain of the transmission circuit 21 is set smaller than the gain of the transmission circuit 22. By doing so, it is possible to make the transmitted voice levels in the closed state and the open state the same, make the other party's listening volume the same, and eliminate the strangeness of the other party during the call.
[0034]
Next, another embodiment of the present invention will be described. FIG. 5 shows a schematic longitudinal side view of another embodiment of a mobile phone according to the present invention. In the figure, the same components as those in FIG. In the embodiment shown in FIG. 5, the transmitter / receiver 24 is arranged in the upper casing 2, and the transmission sound hole 25 communicating with the back of the transmitter / receiver 24 is provided in the upper casing 2. There is a feature in the point. The transmitter / receiver 24 operates as a receiver on the inner surface of the upper casing 2 and operates as a transmitter on the outer surface (back surface).
[0035]
FIG. 6 shows a block diagram of another embodiment of a cellular phone according to the present invention. In the figure, the same components as those in FIGS. 2 and 5 are denoted by the same reference numerals, and the description thereof is omitted. In FIG. 6, the operation in the open state is the same as in FIG. However, at this time, the selection circuit 27 is switched to connect the output terminal of the receiver circuit 19 to the transmitter / receiver 24.
[0036]
Next, an operation during a call in the closed state will be described. In FIG. 6, when the closed state is detected, the receiver selection circuit 16 is connected to the input terminal of the receiver circuit 20 and the transmitter selection circuit 17 is connected to the output terminal of the transmitter circuit 28 according to the detection signal from the open / close detection circuit 18. Then, the selection circuit 27 is connected to the input terminal of the transmission circuit 28. As a result, the signal from the other party transmitted from a base station (not shown) is received by the antenna 8 and demodulated into a received voice signal by the radio unit 15, and then supplied to the receiver circuit 20 by the receiver selection circuit 16 and amplified. Furthermore, the receiver 10 performs electro-acoustic conversion to generate a received voice.
[0037]
On the other hand, the user's transmitted voice is picked up by the transmitter / receiver 24 through the transmission sound hole 25 of FIG. 5 and is acoustic-electrically converted into a voice signal, which will be described later by the transmitter circuit 28 of FIG. Is supplied to the radio unit 15 via the transmitter selection circuit 17, modulated there, converted into a predetermined radio band, and wirelessly transmitted from the antenna 8 to the base station. The In this way, in this embodiment, it is possible to talk with the other party in the open state as well as in the conventional case, and even with the closed state, it is possible to talk with the other party without feeling uncomfortable with the opened state.
[0038]
Here, the transmission characteristics of the transmitter / receiver 24 are, for example, frequency characteristics having peaks in the vicinity of 700 to 800 Hz and in the vicinity of 3 kHz, as shown in FIG. Therefore, the transmission circuit 28 is set to an amplification frequency characteristic having a dip near 700 to 800 Hz and around 3 kHz as shown in FIG. As a result, the voice signal for transmission supplied from the transmission circuit 28 to the wireless unit 15 via the transmitter selection circuit 17 is given a flat frequency characteristic. As a method for realizing a complicated amplification frequency characteristic as shown in FIG. 8, signal processing by a digital signal processor (DSP) can be used.
[0039]
The above is an embodiment in which the present invention is applied to a foldable mobile phone. However, the present invention is not limited to this, and the slide type mobile phone shown in the perspective view of FIG. 8 and the side view of FIG. Is also applicable. As shown in FIG. 9, the mobile phone is used with the slide operation unit 32 pulled out from the lower side of the housing unit 31. When the mobile phone is carried, the slide operation unit 32 is used as shown in FIG. 10. Placed on the underside.
[0040]
A liquid crystal display unit 33 is disposed at the center on the upper surface of the housing unit 31, a receiver 34 is disposed at the upper part, a transmitter 35 is disposed at the lower part, and an antenna 36 is disposed at the upper end. Further, slide grooves 38 are formed on the left and right side surfaces of the housing portion 31 to engage with convex portions provided at the inner side end portion of the slide operation portion 32. Further, as shown in FIG. 9, a key operation unit 39 and a transmitter 40 are arranged on the upper surface of the slide operation unit 32.
[0041]
Here, during normal use, as shown in FIG. 9, the slide operation unit 32 is pulled out from the lower part of the housing unit 31 and the receiver 34 and transmitter 40 are used. On the other hand, in a state where the slide operation unit 32 is housed in the lower part of the casing unit 31, the transmitter 40 is covered with the casing unit 31, so that the transmitter 35 is used instead of the transmitter 40. . The handset 34 is commonly used regardless of whether the slide operation unit 32 is slid.
[0042]
Also in this embodiment, the slide operation unit 32 is set in FIG. 10 by setting the frequency characteristics of the transmitter circuit according to the frequency characteristics of the transmitter 35 and the transmitter 40 as in the above-described embodiments. Even when it is housed like this, it is possible to make a call without any sense of incongruity with the state shown in FIG.
[0043]
Note that the present invention is not limited to the above embodiment. For example, in FIG. 1B, the transmitter 9 and the receiver 10 are provided on the back surface of the upper casing 2, but the lower casing 1 may be provided with a transmitter and a receiver. Further, the transmitter / receiver 24 and the transmission sound hole 25 of FIG.
[0044]
【The invention's effect】
As described above, according to the present invention, the transmitter / receiver can be used as a receiver in the open state and can be used to talk using the transmitter, and the transmitter / receiver can be transmitted in the closed state. Since it is used as a transmitter through a speech hole and can be used to make a call using a receiver, both the open state and the closed state can be used by using the transmitter / receiver, and usability can be improved.
[0048]
Further, according to the present invention, the received voice from the receiver used in the closed state and the received voice from the transmitter / receiver used as the receiver in the open state have the same characteristics. Therefore, it is possible to make a call with no discomfort between the open state and the closed state.
[0049]
Furthermore, according to the present invention, a voice signal from a transmitter used as a transmitter in a closed state is used as a voice signal from a transmitter used in an open state. By using the same frequency as that of the transmitter, it is possible to wirelessly transmit the transmitted voice signal with the same characteristics regardless of whether the transmitter or the receiver for both the transmitter and the receiver is used. Sending voice can be transmitted.
[Brief description of the drawings]
FIG. 1 is a perspective view, a schematic longitudinal sectional view, and a configuration diagram of a main part of each state according to an embodiment of the present invention.
FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 3 is a diagram illustrating an example of frequency characteristics of two receivers in FIGS. 1 and 2;
FIG. 4 is a diagram showing frequency characteristics of two transmission circuits in FIG. 2;
FIG. 5 is a schematic longitudinal sectional view of another embodiment of the present invention.
FIG. 6 is a block diagram of another embodiment of the present invention.
7 is a diagram showing an example of transmission characteristics of the transmitter / receiver in FIG. 6. FIG.
FIG. 8 is a diagram showing frequency characteristics of the transmission circuit in FIG. 6;
FIG. 9 is a perspective view in a pulled-out state according to still another embodiment of the present invention.
FIG. 10 is a side view of a storage state of still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower housing | casing part 2 Upper housing | casing part 3 Hinge 4, 39 Key operation part 5, 9, 35, 40 Transmitter 6, 33 Liquid crystal display part 7, 10, 34 Handset 8, 36 Antenna 11 Magnet 12 Hall IC
13 Hall IC output detection circuit 15 Radio unit 16 Handset selection circuit 17 Transmitter selection circuit 18 Open / close detection circuit 19, 20 Reception circuit 21, 22, 28 Transmission circuit 24 Transmitter / receiver 25 Transmission sound hole 27 Selection circuit 31 Housing 32 Slide operation unit

Claims (3)

At least the lower housing part with the operation part provided on the inner side surface and the upper housing part with at least the display part provided on the inner side surface are coupled to each other by a hinge so that the inner side surfaces are A foldable mobile phone that is in one of a closed state in close contact with each other and an open state in which the inner side surfaces are separated from each other,
A transmitter provided on one inner surface of the lower housing part and the upper housing part;
A transmitter / receiver provided on the other inner surface of the lower casing and the upper casing;
A transmission sound hole provided on the outer surface of the other casing so as to communicate with the transmitter / receiver;
A receiver provided on the outer surface of the other casing, and when the phone is open, the transmitter / receiver is used as a receiver and the transmitter is used. Is a portable telephone using both the transmitter / receiver as a transmitter through the transmission sound hole and the receiver. Opening / closing detecting means for detecting whether the open state or the closed state, and a predetermined frequency characteristic corresponding to the reception characteristic of the transmitter / receiver is added to the received voice signal and supplied to the transmitter / receiver. 1 receiving circuit and a frequency characteristic having substantially the same frequency characteristic as the received voice signal supplied to the transmitter / receiver in accordance with the frequency characteristic of the receiver is added to the received voice signal and supplied to the receiver. When an open state detection signal is output from the second reception circuit and the open / close detection means, a reception voice signal is supplied to the first reception circuit, and an output reception voice signal of the first reception circuit is supplied to the first reception circuit. And a receiver selection means for supplying a received voice signal to the second receiver circuit when a closed state detection signal is output from the open / close detection means. 1, wherein Mobile phone. A first transmission circuit for giving a predetermined frequency characteristic to the transmission voice signal according to a frequency characteristic of the transmitter; and the first transmission circuit according to the transmission characteristic of the transmitter / receiver. A second transmission circuit for giving a frequency characteristic that is substantially the same as the frequency characteristic of the transmission voice signal output from the transmission voice signal from the transmitter / receiver, and an open state detection signal from the open / close detection means Is output to the wireless transmission means for transmission, and when the closed state detection signal is output from the open / close detection means, the transmitter is also used. A transmitter selection unit for supplying a transmission voice signal from the receiver to the second transmission circuit and supplying an output transmission voice signal of the second transmission circuit to the wireless transmission unit for transmission; The mobile phone according to claim 2 , further comprising:

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