JP2004088447A - Portable communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To entirely exclude influence on an image signal from a radio transmitting operation to an imaging part, and also influence on communication quality from the imaging operation of the imaging part to a radio receiving circuit. <P>SOLUTION: The radio timing control part 6 of a base band part 5 controls the radio transmitting/receiving operation of a radio exchange part 7, grasps the timing of the radio transmitting operation in a plurality of communication slots through the use of a radio transmission timing signal, and outputs a timing signal which indicates a period without a transmitting operation to a camera control part 2 as a photographing permission timing signal 8 during the period. The camera control part 2 allows a camera part 1 to perform a pixel scan operation only during the period without the radio transmitting operation, so as to perform photographing. Thus the radio transmitting operation and the camera photographing operation are performed by time division. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication terminal having an imaging function.
[0002]
[Prior art]
In a camera-equipped mobile communication terminal having an imaging function, various proposals have conventionally been made in order to reduce the influence of the imaging unit and the wireless communication unit on each other and suppress deterioration of image signals and communication quality.
[0003]
For example, Japanese Patent Application Laid-Open No. 2001-86046 discloses a camera-equipped mobile phone device including a detachable external antenna, a receiving unit connected to the external antenna, a built-in antenna, and a receiving unit connected to the built-in antenna. When the external antenna is mounted, by selecting an antenna having a higher reception level from the external antenna and the built-in antenna as an antenna to be actually used, fading countermeasures at the time of image transmission. Is disclosed.
[0004]
In a conventional mobile communication terminal with a camera, image noise generated by the influence of a radio transmission wave on an analog signal of an image sampling unit of an imaging unit or noise caused by an operation clock of an imaging unit affects a radio reception circuit. In order to suppress the deterioration of the reception performance caused by the noise, noise countermeasures such as adding a capacitor to the analog signal part and the digital signal part of the imaging unit or shielding the analog signal part and the digital signal part of the imaging unit have been taken.
[0005]
[Problems to be solved by the invention]
However, in the conventional example of Japanese Patent Application Laid-Open No. 2001-86046, a plurality of antennas or a plurality of receiving circuits are required. The method of selecting the receiving circuit is adopted, and there is a problem that the effect of the wireless transmission wave of the wireless communication unit on the imaging unit or the effect of the imaging unit on the wireless receiving circuit cannot be completely eliminated. .
[0006]
In addition, measures to prevent noise by adding capacitors to the analog signal section and digital signal section of the imaging section, or by shielding the analog signal section and digital signal section of the imaging section, require additional electronic components and shielding materials. Therefore, there is a problem that not only an obstacle to reducing the size and weight of the mobile communication terminal but also an increase in cost is caused.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless receiving circuit that an effect of a wireless transmission operation on an image signal given to an imaging unit and an imaging operation of the imaging unit can be achieved without adding a countermeasure component. It is an object of the present invention to provide a mobile communication terminal that can completely eliminate the influence on communication quality of the mobile communication terminal.
[0008]
[Means for Solving the Problems]
The portable communication terminal according to the present invention includes: an imaging unit that captures an image of a subject; a wireless communication unit that performs a transmission / reception operation by wireless communication; and a transmission / reception operation of the wireless communication unit, and the wireless communication unit performs a transmission operation. Wireless timing control means for outputting a timing signal indicating a non-period period, and photographing control means for permitting a photographing operation by the imaging means only as a photographing permission period during which the transmission operation is not performed based on the timing signal. It is characterized by having.
[0009]
With the above configuration, the wireless transmission operation and the photographing operation can be performed in a time-division manner, and the influence of the wireless transmission operation on the image pickup means, such as image disturbance, can be completely eliminated without adding a countermeasure component such as a shield member or a capacitor. Can be eliminated.
[0010]
Further, the photographing control means starts the photographing operation from a start time of the photographing permission period, and performs photographing of one screen by the photographing means until a period for performing the next transmission operation by the wireless communication means comes. It is characterized by being completed.
[0011]
With the above configuration, it is possible to completely eliminate the influence of the wireless transmission operation on the imaging means, such as image disturbance, and to prevent interruption of the shooting operation during shooting of one screen of the subject image. Discontinuity can be prevented.
[0012]
A portable communication terminal according to the present invention includes: an imaging unit that captures an image of a subject; a wireless communication unit that performs a transmission / reception operation by wireless communication; and a transmission / reception operation of the wireless communication unit. Wireless timing control means for outputting a timing signal indicating a period during which no operation is performed; and photographing for permitting a photographing operation by the imaging means based on the timing signal only as a photographing permission period during which the transmission operation and the reception operation are not performed. And control means.
[0013]
According to the above configuration, the wireless transmission operation, the wireless reception operation, and the imaging operation can be performed in a time-division manner, and without adding a countermeasure component such as a shield member or a capacitor, the image transmitted by the wireless transmission operation to the imaging unit may be disturbed. It is possible to completely eliminate the influence of the image capturing operation of the imaging means on the wireless reception operation, such as the deterioration of the reception sensitivity.
[0014]
Further, the photographing control means starts the photographing operation from a start time of the photographing permission period, and the photographing operation is performed by the wireless communication means until a period in which one of a next transmitting operation and a receiving operation is performed arrives. It is characterized in that photographing for one screen is completed.
[0015]
According to the above configuration, it is possible to completely eliminate the influence of the wireless transmission operation on the image pickup means such as image disturbance and the influence of the image pickup operation of the image pickup means on the wireless reception operation such as deterioration of the reception sensitivity. Since there is no interruption in the photographing operation during the minute photographing, it is possible to prevent temporal discontinuity of each pixel data.
[0016]
Further, the wireless communication means is characterized by performing a communication operation by a wireless communication system that performs a time-division transmission operation and a reception operation discontinuously every predetermined period.
[0017]
With the above configuration, the present invention can be applied to a mobile communication terminal with a camera that supports a time-division transmission operation and a reception operation such as a GSM method or a PDC method, which is a TDMA method, with a camera. Can be performed in a time-sharing manner, and it is possible to eliminate mutual adverse effects between the imaging means and the wireless communication means.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, a configuration example of a camera-equipped mobile communication terminal including a camera unit having a function of capturing a moving image or a still image and a wireless transmission / reception unit having a time-division wireless communication function such as a TDMA method will be described.
[0019]
FIG. 1 is a block diagram showing a configuration of the mobile communication terminal according to the embodiment of the present invention. The mobile communication terminal according to the present embodiment includes a camera unit 11 that captures a subject image using an image sensor such as a CMOS sensor to obtain image data, a camera control unit 12 that controls the operation of the camera unit 11, and a camera control unit. 12, an application execution unit 13 for displaying and storing captured image data, a baseband unit 15 for generating modulation / demodulation data for wireless communication, and transmitting / receiving frame processing, and an operation of the baseband unit 5 It includes a communication control unit 14 for controlling and managing a wireless communication protocol, and a wireless transmitting and receiving unit 17 for transmitting and receiving communication radio waves.
[0020]
When the camera unit 11 includes a CMOS sensor, the camera control unit 12 controls a shooting operation of the camera unit 11 by controlling scanning of the CMOS sensor. The baseband unit 15 includes a wireless timing control unit 16 that controls timing of wireless communication. The wireless timing control unit 16 controls the timing of the wireless transmission / reception operation in the wireless transmission / reception unit 17, grasps the wireless transmission timing and the wireless reception timing, and controls the camera unit 11 according to the transmission / reception frame at the time of wireless communication. It outputs a photographing permission timing signal 18 for permitting the photographing operation.
[0021]
FIG. 2 is an operation explanatory diagram illustrating a pixel scanning operation as a photographing operation when the camera unit 11 according to the present embodiment is configured by a CMOS sensor. The CMOS sensor 20 is configured by two-dimensionally arranging pixels 21 each of which is a light receiving unit for acquiring luminance and color information of a corresponding portion of a subject. The CMOS sensor 20 performs a scanning operation in which the individual pixels 21 are sequentially set in an active state in which luminance and color information can be obtained in a pixel scanning operation order 22 indicated by an arrow, and obtains luminance and color information of the entire subject to obtain image data. Is generated, and the photographing operation is completed.
[0022]
That is, in the CMOS sensor 20 composed of a total of 12 pixels 1 to 12, first, the pixel 1 is enabled to obtain the luminance and color information, and then the pixel 2 is enabled to obtain the same information. The photographing operation is completed by repeatedly reaching the pixel 12 with the pixel 4, the pixel 5,..., And one piece of image data of the photographed object is generated. Further, by repeating this photographing operation, a continuous still image is obtained and a moving image can be generated.
[0023]
Although FIG. 2 shows an example of a COMS sensor composed of a total of 12 pixels for simplification of description, it is generally composed of a much larger number of pixels according to the resolution of the camera unit. It is a target.
[0024]
FIG. 3 is a timing chart illustrating a time relationship between the wireless transmission operation and the camera shooting operation of the mobile communication terminal according to the first embodiment of the present invention. Hereinafter, the operation of the camera unit 11 during wireless communication according to the first embodiment will be described with reference to FIG. In the following embodiment, a case is described in which the wireless transmitting and receiving unit 17 performs a time-division transmitting and receiving operation according to the GSM method.
[0025]
In FIG. 3, a non-communication camera photographing operation timing 31 indicates a pixel scanning operation on a time axis as a photographing operation of the camera unit 11 when the wireless transmission / reception unit 17 is not performing wireless communication. In this case, the pixels 1 to 12 are continuously scanned to acquire the luminance and color information of each pixel.
[0026]
The GSM transmission / reception slot 32 shows a configuration of a total of eight time slots 0 to 7 for performing wireless transmission / reception according to the GSM method. Here, a case is shown in which a wireless transmission operation is performed at the position of slot 1 among eight wireless transmission / reception slots in GSM transmission / reception slot 32. The wireless transmission timing signal 33 indicates a transmission timing when performing a wireless transmission operation at the position of the slot 1 of the GSM transmission / reception slot 32. In the example of FIG. 3, the wireless transmission timing signal 33 becomes high level at the timing of slot 1. The photographing permission timing signal 34 corresponds to the photographing permission timing signal 18 in FIG. 1, and indicates that the wireless transmitting / receiving unit 17 is not performing wireless transmission, that is, that the photographing operation can be performed on the camera unit 11. The illustrated photographing permission timing is shown. In the example of FIG. 3, the photographing permission timing signal 34 becomes low level at the timing of the slot 1 and becomes high level in other periods.
[0027]
The communication-time camera shooting operation timing 35 indicates a pixel scanning operation of the camera unit 11 during communication controlled by the shooting permission timing signal 34. In the present embodiment, the photographing operation is performed only during the period when the photographing permission timing signal 34 is at the high level. In the communication camera photographing operation timing 35, a photographing data discarding section 36 indicates a period in which photographed pixel data is discarded when the photographing permission timing signal 34 changes to low level and the photographing is prohibited, The operation stop section 37 indicates a period in which the photographing permission timing signal 34 is at a low level and the photographing operation is prohibited and the photographing operation is stopped and the photographing operation is stopped.
[0028]
As shown in the GSM transmission / reception slot 32, one period of the GSM transmission / reception slot is composed of eight time slots 0 to 7, and one or more of the eight radio transmission / reception slots are used for radio communication. Send. Since the wireless timing control unit 16 controls the wireless transmission / reception operation timing of the wireless transmission / reception unit 17, it naturally understands the wireless transmission timing in detail. For this reason, based on the control of the wireless transmission / reception operation timing, at a timing when wireless transmission is not performed, a shooting permission timing signal 34 indicating a timing at which a shooting operation is possible is output to the camera unit 11, and this is output to the camera control unit. 12 is sent.
[0029]
The camera control unit 12 starts the pixel scanning operation of the camera unit 11 from a predetermined point in time when the photographing permission timing signal 34 is at a high level, as shown in the camera photographing operation timing 35 during communication in FIG. Then, when the radio transmission timing signal 33 becomes high level, the shooting permission timing signal 34 changes from high level to low level, and the shooting permission state is once terminated, the pixel scan timing at that time is set as a shooting data discarding section 36. , The data of the pixel being photographed is discarded. Further, a period from the next pixel scan timing until the photographing permission timing signal 34 becomes the high level again is defined as a photographing operation stop section 37. In other words, the photographing operation is stopped during the period in which the photographing permission timing signal 34 is at the low level and the photographing is not permitted, and waits until the photographing permission timing signal 34 becomes the high level again to be in the photographing permitted state. Thereafter, when the photographing is allowed again, the photographing operation is restarted.
[0030]
In this way, the pixel scanning operation of the camera unit 11 is repeatedly started and stopped according to the state of the camera photographing permission timing signal 34 under the control of the camera control unit 12. Then, when the pixel scanning operation is restarted, the scanning is started from the next pixel after the pixel which has been completely scanned at the previous stop, and as a result, all continuous pixel scanning is performed.
[0031]
At this time, between the pixel data scanned immediately before the pixel scan is stopped and the pixel data scanned immediately after the restart, a temporal discontinuity corresponding to the period of the photographing data discarding section 36 and the photographing operation stopping section 37 occurs. However, since the transmission time per transmission slot in the GSM system is as small as about 4.615 msec, even when an image of the entire screen is viewed from all pixel data, the disturbance of the image due to the discontinuity is visually impaired by humans. Not a problem.
[0032]
As described above, in the present embodiment, the wireless transmission operation and the photographing operation can be performed in a time-division manner, and the influence of the wireless transmission operation on the camera unit, such as image disturbance, can be completely eliminated. Also, there is no need to add any countermeasure parts such as capacitors to the analog signal section and digital signal section of the camera section, or to provide a shield member, so that the adverse effects between the camera section and the wireless transmission / reception section are eliminated. Can be eliminated.
[0033]
FIG. 4 is a timing chart illustrating a time relationship between a wireless transmission / reception operation and a camera shooting operation of the mobile communication terminal according to the second embodiment of the present invention. Hereinafter, the operation of the camera unit 11 during wireless communication according to the second embodiment will be described with reference to FIG.
[0034]
4, the same elements as those in FIG. 3 are denoted by the same reference numerals, and the description of the operation will be omitted. In the second embodiment, a photographing operation at the time of communication taking into account the wireless reception timing in addition to the wireless transmission timing will be described. FIG. 4 shows a case where a wireless transmission operation is performed at the position of slot 1 and a wireless reception operation is performed at the position of slot 5 among eight wireless transmission / reception slots in the GSM transmission / reception slot 32.
[0035]
The wireless transmission timing signal 33 indicates the transmission timing when performing the wireless transmission operation at the position of the slot 1 of the GSM transmission / reception slot 32 as in FIG. The wireless reception timing signal 43 indicates the reception timing when performing the wireless reception operation at the position of the slot 5 of the GSM transmission / reception slot 32. In the example of FIG. 4, the wireless reception timing signal 43 becomes high level at the timing of the slot 5.
[0036]
In the second embodiment, wireless transmission and reception are performed using one or more of the eight wireless transmission / reception slots of the GSM transmission / reception slot 32. The wireless timing control unit 16 grasps the wireless transmission timing and the wireless reception timing in detail, and based on the control of the wireless transmission and reception operation timing, shoots the camera unit 11 at the timing when wireless transmission and wireless reception are not performed. It outputs a photographing permission timing signal 44 indicating a timing at which the operation is possible, and sends it to the camera control unit 12.
[0037]
The camera control unit 12 starts the pixel scanning operation of the camera unit 11 from a predetermined point in time when the photographing permission timing signal 44 is at the high level, as indicated by the communication camera photographing operation timing 45 in FIG. Then, when the radio transmission timing signal 33 becomes high level, the shooting permission timing signal 44 changes from high level to low level, and the shooting permission state is once terminated, the pixel scan timing at that time is set as the shooting data discarding section 36. , The data of the pixel being photographed is discarded. Further, a period from the next pixel scan timing until the shooting permission timing signal 44 becomes the high level again is defined as a shooting operation stop section 37. In other words, the photographing operation is stopped during the period in which the photographing permission timing signal 34 is at the low level and the photographing is not permitted, and waits until the photographing permission timing signal 34 becomes the high level again to be in the photographing permitted state. Thereafter, when the photographing is allowed again, the photographing operation is restarted.
[0038]
Next, when the wireless reception timing signal 43 goes high and the shooting permission timing signal 44 changes from high level to low level, the shooting operation is stopped and started in the same manner as at the time of the wireless transmission timing. In this way, the pixel scanning operation of the camera unit 11 is repeatedly started and stopped according to the state of the camera photographing permission timing signal 44 under the control of the camera control unit 12. Then, when the pixel scanning operation is restarted, the scanning is started from the next pixel after the pixel which has been completely scanned at the previous stop, and as a result, all continuous pixel scanning is performed.
[0039]
As described above, in the present embodiment, the wireless transmission operation, the wireless reception operation, and the shooting operation can be performed in a time-division manner, and the wireless transmission operation can be performed without adding a countermeasure component such as a shield member or a capacitor to the camera unit. It is possible to completely eliminate effects such as disturbance of an image on the camera unit and effects such as deterioration of reception sensitivity on a wireless reception operation by a photographing operation of the camera unit.
[0040]
FIG. 5 is a timing chart illustrating a time relationship between a wireless transmission operation and a camera shooting operation of the mobile communication terminal according to the third embodiment of the present invention. Hereinafter, the operation of the camera unit 11 during wireless communication according to the third embodiment will be described with reference to FIG.
[0041]
5, the same elements as those in FIG. 3 are denoted by the same reference numerals, and the description of the operation will be omitted. In the third embodiment, a photographing operation at the time of wireless transmission when a high-speed pixel scan operation is used in the camera unit 11 will be described. FIG. 5 shows a case where a wireless transmission operation is performed at the position of slot 1 among eight wireless transmission / reception slots in GSM transmission / reception slot 32.
[0042]
In this third embodiment, the camera control unit 12 starts the camera unit 11 from the time when the wireless transmission timing ends and the shooting permission timing signal 34 becomes high level, as shown in the communication camera shooting operation timing 55 in FIG. Is started. In this case, during the period from when the next wireless transmission timing arrives, the wireless transmission timing signal 33 becomes high level, and the shooting permission timing signal 34 changes from high level to low level, one screen before entering the shooting prohibited state. The pixel scanning operation of all the pixels is performed so as to complete the imaging operation for one minute. In this photographing operation, the scanning operation speed is increased for all the pixels of the camera unit 11, and the time required for scanning all the pixels for one screen of the camera unit 11 is completed in a time shorter than the time for seven GSM transmission / reception slots 32. This is made possible by increasing the speed so as to perform the operation.
[0043]
Then, a period from the end of the pixel scanning operation to the time when the photographing permission timing signal 34 becomes high level again to be in the photographing permitted state is defined as a photographing operation stop section 57, and the photographing operation is stopped during the period including the wireless transmission timing. I do.
[0044]
With the above operation, the pixel scanning operation of the camera unit 11 is started when the photographing permission timing signal 34 becomes high level and the photographing is permitted, and all the pixel scans for one screen are performed before shifting to the photographing prohibited state. The operation is completed, and the camera enters a state of stopping the photographing operation. For this reason, unlike the first embodiment of FIG. 3, the third embodiment does not generate a shooting data discarding section and a shooting operation stop section due to the stop of the pixel scanning operation during the pixel scanning of one screen. It is possible to prevent the occurrence of a target discontinuity.
[0045]
FIG. 6 is a timing chart illustrating a time relationship between a wireless transmission / reception operation and a camera shooting operation of the mobile communication terminal according to the fourth embodiment of the present invention. Hereinafter, the operation of the camera unit 11 during wireless communication according to the fourth embodiment will be described with reference to FIG.
[0046]
6, the same elements as those in FIG. 4 are denoted by the same reference numerals, and the description of the operation will be omitted. In the fourth embodiment, a photographing operation at the time of wireless transmission / reception when a high-speed pixel scan operation is used in the camera unit 11 will be described. FIG. 6 shows a case where a wireless transmission operation is performed at the position of slot 1 and a wireless reception operation is performed at the position of slot 5 among eight wireless transmission / reception slots in the GSM transmission / reception slot 32.
[0047]
In the fourth embodiment, as in the third embodiment, the camera control unit 12 terminates the wireless transmission timing and sets the shooting permission timing signal 44 to a high level, as shown in the communication camera shooting operation timing 65 in FIG. At this point, the pixel scanning operation of the camera unit 11 is started. In this case, during the period from when the next wireless reception timing arrives, the wireless reception timing signal 43 becomes high level, and the shooting permission timing signal 44 changes from high level to low level, one screen is displayed before the shooting disabled state. The pixel scanning operation of all the pixels is performed so as to complete the imaging operation for one minute. In this photographing operation, the scanning operation speed for all the pixels of the camera unit 11 is increased, and the time required for scanning all the pixels for one screen of the camera unit 11 is completed in a time shorter than the time for three GSM transmission / reception slots 32. This is made possible by increasing the speed so as to perform the operation.
[0048]
Then, a period from the end of the pixel scanning operation until the photographing permission timing signal 44 becomes the high level again to enter the photographing permission state is defined as a photographing operation stop section 57, and the photographing operation is stopped during the period including the wireless transmission timing. I do.
[0049]
Further, during the period from the end of the wireless reception timing to the next time when the wireless transmission timing signal 33 goes to the high level and the shooting permission timing signal 44 changes from the high level to the low level, the high speed operation is performed in the same manner as after the wireless transmission timing. Starts and stops the shooting operation by scanning.
[0050]
According to the above operation, the pixel scanning operation of the camera unit 11 is started when the photographing permission timing signal 44 becomes high level and the photographing is permitted, and all the pixel scans for one screen are performed before shifting to the photographing prohibited state. The operation is completed, and the camera enters a state of stopping the photographing operation. Therefore, the fourth embodiment differs from the second embodiment in FIG. 4 in that the photographic data discard section and the photographic operation stop section due to the stop of the pixel scan operation do not occur during the pixel scan of one screen, so that the pixel data time It is possible to prevent the occurrence of a target discontinuity.
[0051]
In the above-described embodiment, the case of a portable communication terminal that performs wireless transmission / reception according to the GSM method has been described as a wireless communication method. However, the present invention is not limited to this, and a time division method in which transmission / reception is performed discontinuously at predetermined intervals. Other wireless communication systems can be similarly applied. For example, the present invention can be applied to a PDC system using a TDMA system, a PHS system using a TDMA-TDD system, and the like.
[0052]
It should be noted that the present invention is not limited to the above-described embodiment at all, and can be implemented in various modes without departing from the gist thereof.
[0053]
【The invention's effect】
As described above, according to the present invention, the effect of the wireless transmission operation on the image signal given to the image pickup unit and the effect of the image pickup operation of the image pickup unit on the communication quality given to the wireless reception circuit without adding a countermeasure component Can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a mobile communication terminal according to an embodiment of the present invention. FIG. 2 is an operation explanatory diagram illustrating a pixel scanning operation in a CMOS sensor as a photographing operation of a camera unit in the embodiment. FIG. 4 is a timing chart illustrating a time relationship between a wireless transmission operation and a camera photographing operation of the mobile communication terminal according to the first embodiment of the present invention. FIG. 5 is a timing chart illustrating a time relationship between a camera photographing operation and a wireless communication operation of a portable communication terminal according to a third embodiment of the present invention. A timing chart illustrating a time relationship between a wireless transmission / reception operation and a camera shooting operation of the portable communication terminal according to the fourth embodiment of the present invention.
Reference Signs List 11 camera unit 12 camera control unit 13 application execution unit 14 communication control unit 15 baseband unit 16 wireless timing control unit 17 wireless transmission / reception unit 18 shooting permission timing signal 20 CMOS sensor 21 pixel 22 pixel scanning operation sequence 31 camera shooting operation during non-communication Timing 32 GSM transmission / reception slot 33 Wireless transmission timing signal 34, 44 Imaging permission timing signal 35, 45, 55, 65 Camera imaging operation timing during communication 36 Image data discarding section 37, 57 Imaging operation stop section 43 Wireless reception timing signal

Claims (5)

Imaging means for imaging a subject image;
Wireless communication means for performing transmission and reception operations by wireless communication,
A wireless timing control unit that controls a transmission / reception operation of the wireless communication unit and outputs a timing signal indicating a period during which the wireless communication unit does not perform a transmission operation;
A photographing control unit that permits a photographing operation by the photographing unit only during a period in which the transmission operation is not performed based on the timing signal as a photographing permission period;
A mobile communication terminal comprising: The photographing control unit starts the photographing operation from the start of the photographing permission period, and completes photographing of one screen by the photographing unit until a period for performing the next transmission operation by the wireless communication unit comes. The mobile communication terminal according to claim 1, wherein: Imaging means for imaging a subject image;
Wireless communication means for performing transmission and reception operations by wireless communication,
A wireless timing control unit that controls a transmission / reception operation of the wireless communication unit and outputs a timing signal indicating a period during which the wireless communication unit does not perform a transmission operation and a reception operation;
A photographing control unit that permits a photographing operation by the photographing unit only during a period in which the transmission operation and the reception operation are not performed based on the timing signal as a photographing permission period;
A mobile communication terminal comprising: The photographing control unit starts the photographing operation from a start time of the photographing permission period, and sets one screen by the imaging unit until a period in which either the next transmitting operation or the receiving operation is performed by the wireless communication unit comes. The mobile communication terminal according to claim 3, wherein photographing of the minute is completed. 5. The wireless communication unit according to claim 1, wherein the wireless communication unit performs a communication operation by a wireless communication system that performs a time-division transmission operation and a reception operation discontinuously every predetermined period. Mobile communication terminal.

Images