JP2014007663A - Portable terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal which performs controlling for image capturing according to the holding state of the portable terminal.SOLUTION: A portable terminal includes: a housing; an image capturing section; a contact detection section which detects the contact state of a person holding the housing with the housing; a holding state determination section which determines the holding state of the housing on the basis of a detection result of the contact detection section; and an exposure conditioning part that sets exposure conditions, which are suitable for the holding state of the housing detected by the holding state determination section, in the image capturing section.

Description

  The present invention relates to a mobile terminal that performs control for imaging according to a gripping state of the mobile terminal.

  The imaging device disclosed in Patent Document 1 includes an operation result of a switch unit operated at the time of photographing and / or a first shutter switch unit including a lock switch and a release switch and a second shutter switch unit including a lock switch and a release switch. It has a shake correction control unit that changes the correction characteristic according to the detection result of the acceleration sensor as the posture detection unit and performs camera shake correction control on the correction actuator or the like.

  The imaging apparatus of Patent Document 2 includes a detection result of a state detection unit given by a system controller, a first shutter switch unit including a lock switch and a release switch, and a second shutter switch unit including a lock switch and a release switch. The camera has a shake correction control unit that changes the correction characteristics according to the operation result of the switch unit operated at the time of shooting and / or the detection result of the acceleration sensor and performs camera shake correction control on the correction actuator or the like.

Japanese Patent No. 4383370 Japanese Patent No. 4288246

  Since mobile terminals with an imaging function in recent years have been reduced in size and weight, camera shake during imaging increases depending on how the user holds the mobile terminal. In the imaging apparatuses described in Patent Documents 1 and 2 described above, shake correction is performed according to the shooting posture. However, if camera shake is large, there is a possibility that correction is not sufficient. For this reason, when it is predicted that camera shake during imaging is large, it is desirable to take some measures in advance.

  The objective of this invention is providing the portable terminal which performs control for imaging | photography according to the holding state of a portable terminal.

  The present invention includes a housing, an imaging unit, a contact detection unit that detects a contact state of the housing by a person holding the housing, and a detection result of the contact detection unit based on a detection result of the contact detection unit. Provided is a mobile terminal comprising: a gripping state determination unit that determines a gripping state; and an exposure condition setting unit that sets an exposure condition suitable for the gripping state of the housing determined by the gripping state determination unit in the imaging unit To do.

  In the portable terminal, the contact detection unit includes an output unit that outputs an electrical signal and an input unit that can input the electrical signal output from the output unit, and a person who holds the casing captures an image. In a state of contact with the housing when performing, when a person holding the housing grips the housing with one hand, either the output unit or the input unit does not contact the hand, When a person holding the case holds the case with both hands, the output unit and the input unit are respectively placed on the case at a position where both the output unit and the input unit are in contact with the hand. The gripping state determination unit is arranged to determine a two-handed gripping state if an electric signal is input to the input unit, and to determine a one-handed gripping state if an electric signal is not input to the input unit.

  In the portable terminal, the contact detection unit includes an output unit that outputs an electrical signal and an input unit that can input the electrical signal output from the output unit, and a person who holds the casing captures an image. When the person holding the case holds the case with both hands in the state of contact with the case when performing the operation, the output unit and the input unit are in positions where they are in contact with different left and right hands, respectively. The output unit and the input unit are each disposed on the casing, and the gripping state determination unit is configured to detect noise caused by pulsation of a heart of a person holding the casing by an electric signal input to the input unit. Is included, the two-handed gripping state is determined, and if the noise is not included in the electric signal input to the input unit, the one-handed gripping state is determined.

  The portable terminal includes an impedance characteristic analysis unit that analyzes an impedance characteristic of a person holding the casing based on an electrical signal input to the input unit, and the exposure condition setting unit includes the impedance characteristic analysis unit. The exposure condition corresponding to the person corresponding to the impedance characteristic analyzed by is set in the imaging unit.

  According to the mobile terminal according to the present invention, the exposure condition corresponding to the gripping state of the mobile terminal can be set in the imaging unit in advance.

External view showing the portable terminal of the first embodiment The figure which shows the state in which the user hold | gripped the portable terminal 100 with one hand The figure which shows the state in which the user hold | gripped the portable terminal 100 with both hands The block diagram which shows the internal structure of the portable terminal 100 of 1st Embodiment. The flowchart which shows operation | movement of the portable terminal 100 of 1st Embodiment. External view showing a portable terminal having electrodes only on the left side External view showing mobile terminal with electrodes on back side The block diagram which shows the internal structure of the portable terminal 200 of 2nd Embodiment. The figure which shows the state in which the user hold | gripped the portable terminal 200 with both hands The figure which shows the state in which the user hold | gripped the portable terminal 200 with one hand The flowchart which shows operation | movement of the portable terminal 200 of 2nd Embodiment. The block diagram which shows the internal structure of the portable terminal 300 of 3rd Embodiment. The flowchart which shows operation | movement of the portable terminal 300 of 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the portable terminal of embodiment described below has a camera function.

(First embodiment)
FIG. 1 is an external view showing a mobile terminal according to the first embodiment. As shown in FIG. 1, the portable terminal 100 of 1st Embodiment has the display 101 in the front. A touch panel (not shown) is placed on the display 101 of the portable terminal 100 in an overlapping manner. In addition, the portable terminal 100 includes a camera lens 103 on the back surface close to the upper side of the housing 105 when the longitudinal direction of the housing 105 is the vertical direction. In the following description, the surface connecting the front surface on which the display 101 is disposed and the back surface thereof is referred to as “side surface”, the right side surface with respect to the front surface is referred to as “right side surface”, and the left side surface is referred to as “left side surface”.

  The mobile terminal 100 has two electrodes 107 </ b> R <b> 1 and 107 </ b> R <b> 2 that are used for detecting the gripping state of the mobile terminal 100 on the right side surface of the housing 105. As shown in FIG. 1, one electrode 107R1 is disposed on the upper side of the right side surface, and the other electrode 107R2 is disposed on the lower side of the right side surface. Both electrodes are arranged in a state exposed from the right side surface of the housing 105 to the outside. Details of the electrodes 107R1 and 107R2 will be described later.

  In addition, the mobile terminal 100 has two electrodes 107L1 and 107L2 similar to the electrodes 107R1 and 107R2 on the left side surface of the housing 105. As shown in FIG. 1, one electrode 107L1 is disposed on the upper side of the left side surface, and the other electrode 107L2 is disposed on the lower side of the left side surface. Both electrodes are arranged in a state exposed from the left side surface of the housing 105 to the outside. Details of the electrodes 107L1 and 107L2 will be described later.

  The user mainly uses the portable terminal 100 shown in FIG. For example, as shown in FIG. 2, the user holds the portable terminal 100 with one hand so that the display 101 is in front with the longitudinal direction of the housing 105 being vertical. In addition, as shown in FIG. 3, the user may hold the mobile terminal 100 with both hands so that the display 101 is in front with the longitudinal direction of the housing 105 facing sideways. Note that the user may use the portable terminal 100 in a state where it is placed on a cradle that can maintain the posture shown in FIG.

  A weak current is output from the electrode 107R1 disposed on the right side surface of the housing 105. The weak current output from the electrode 107R1 is input to the electrode 107R2 through a conductor such as a user's hand. Similarly, a weak current for detecting the impedance characteristic of the subject holding the mobile terminal 100 is output from the electrode 107L1 disposed on the left side surface of the housing 105. The weak current output from the electrode 107L1 is input to the electrode 107L2 through a conductor such as a user's hand.

  In the state where the portable terminal 100 shown in FIG. 2 is held with one hand, the user's finger is in contact only with the lower electrodes 107R2 and 107L2 on the left and right side surfaces of the housing 105. In this state, there is no conduction between the upper electrode on the left and right side surfaces and the lower electrode. On the other hand, in the state where the portable terminal 100 shown in FIG. 3 is held with both hands, the user's finger is in contact with all the electrodes on the left and right side surfaces of the housing 105. In this state, a weak current flows from the upper electrode 107R1 on the right side surface to the lower electrode 107R2 via the user. Similarly, a weak current flows from the upper electrode 107L1 on the left side surface to the lower electrode 107L2 via the user. Flows.

  FIG. 4 is a block diagram illustrating an internal configuration of the mobile terminal 100 according to the first embodiment. As shown in FIG. 1, the mobile terminal 100 according to the first embodiment includes the electrodes 107R1, 107R2, 107L1, and 107L2 described above, the display 101 described above, the acceleration sensor 111, an operation unit 113, and a control unit 115. An imaging unit 117 and a memory 119.

  The acceleration sensor 111 detects an acceleration value corresponding to a change in the attitude of the mobile terminal 100.

  The operation unit 113 includes a touch panel 121 and a key input unit 123.

  As illustrated in FIG. 4, the control unit 115 includes a camera shake detection unit 131, a weak current output processing unit 133, a gripping state determination unit 135, and a camera function processing unit 137. Hereinafter, each component which comprises the control part 115 is demonstrated.

  The camera shake detection unit 131 detects camera shake at the time of imaging based on a signal from the acceleration sensor 111 obtained when an imaging instruction is given from the camera function processing unit 137 to the imaging unit 117. The camera shake detection unit 131 sends a signal indicating the presence or absence of camera shake to the gripping state determination unit 135 and the camera function processing unit 137. In addition, the camera shake detection unit 131 stores data indicating the amount of displacement of the acceleration value based on a signal from the acceleration sensor 111 (hereinafter referred to as “camera shake data”) in the memory 119. At this time, the camera shake detection unit 131 may store the gripping state of the mobile terminal 100 determined by the gripping state determination unit 135 in the memory 119 in combination with a value indicating the degree of camera shake.

  The weak current output processing unit 133 performs processing to output a weak current from the electrodes 107R1 and 107L1.

  The gripping state determination unit 135 determines the gripping state of the mobile terminal 100 based on the presence / absence of signals input to the electrodes 107R2 and 107L2. In the present embodiment, when a signal equal to or greater than the threshold value is input to at least one of the electrode 107R2 and the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 100 is gripped with both hands. On the other hand, when a signal equal to or greater than the threshold value is not input to either the electrode 107R2 or the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 100 is gripped with one hand or is not gripped with a hand. To do. Furthermore, the gripping state determination unit 135 is configured so that the portable terminal 100 can be operated with one hand when a signal greater than the threshold value is not input to the electrodes 107R2 and 107L2 and a signal indicating the presence of camera shake is transmitted from the camera shake detection unit 131. It is determined that it is gripped by. On the other hand, when the gripping state determination unit 135 does not receive a signal greater than the threshold value to the electrodes 107R2 and 107L2 and a signal indicating no camera shake is sent from the camera shake detection unit 131, It is determined that it is not gripped by and placed on a cradle or the like. The gripping state determination unit 135 sends the determination result to the camera function processing unit 137 and the imaging unit 117.

  The camera function processing unit 137 activates the imaging unit 117 in response to a camera function start operation performed on the operation unit 113. In addition, the camera function processing unit 137 instructs the imaging unit 117 to capture an image in response to a shutter pressing operation performed on the operation unit 113. In addition, the camera function processing unit 137 displays an image captured by the imaging unit 117 on the display 101. In addition, the camera function processing unit 137 stores, in the memory 119, image data instructed via the operation unit 113 among the captured images displayed on the display 101. Further, the camera function processing unit 137 sends the determination result obtained from the gripping state determination unit 135 to the imaging unit 117.

  The imaging unit 117 includes the lens 103, the image sensor 141, the image processing unit 143, and the exposure condition setting unit 145 described above. Hereinafter, each component constituting the imaging unit 117 will be described.

  The image sensor 141 is a solid-state image sensor that photoelectrically converts light transmitted through the lens 103. The image processing unit 143 processes the image data obtained from the image sensor 141.

  The exposure condition setting unit 145 sets the exposure condition in the image sensor 141 before imaging according to the determination result by the gripping state determination unit 135 of the control unit 115. The exposure conditions of this embodiment include ISO sensitivity (gain) and exposure time. For example, the exposure condition setting unit 145 sets the ISO sensitivity included in the exposure condition when it is determined that the portable terminal 100 is held with one hand as 1600, the exposure time as 60 milliseconds, and the portable terminal 100 operates with both hands. The ISO sensitivity included in the exposure condition when it is determined as being held is set to 800, and the exposure time is set to 100 milliseconds. As described above, the exposure condition setting unit 145 sets the ISO sensitivity to be high and the exposure time to be short in the gripping state of the mobile terminal 100 with one hand (hereinafter referred to as “one hand gripping state”), and grips the mobile terminal 100 with both hands. In the state (hereinafter referred to as “two-hand grip state”), the ISO sensitivity is set low and the exposure time is set long.

  The exposure condition setting unit 145 determines the exposure condition when it is determined that the portable terminal 100 is not held by a hand and is placed on a cradle or the like (hereinafter referred to as “placed state”). The exposure conditions are set in the same manner as when the terminal 100 is determined to be held with both hands.

  FIG. 5 is a flowchart illustrating the operation of the mobile terminal 100 according to the first embodiment. Note that the flowchart shown in FIG. 5 shows the determination of the gripping state of the mobile terminal 100 by the gripping state determination unit 135 of the control unit 115 and the setting of the exposure condition by the exposure condition setting unit 145 of the imaging unit 117 according to the determination result. explain.

  As shown in FIG. 5, the gripping state determination unit 135 determines the gripping state of the mobile terminal 100 according to whether or not a signal equal to or greater than the threshold value is input to the electrodes 107R2 and 107L2 (step S101). When a signal equal to or higher than the threshold value is input to at least one of the electrode 107R2 and the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 100 is in the two-handed gripping state, and proceeds to step S103. On the other hand, when a signal equal to or greater than the threshold value is not input to either the electrode 107R2 or the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 100 is in a one-hand gripping state or a placement state, and proceeds to step S105.

  In step S <b> 105, the gripping state determination unit 135 determines the gripping state of the mobile terminal 100 according to the signal from the camera shake detection unit 131 of the control unit 115. When the signal from the camera shake detection unit 131 indicates that there is camera shake, the gripping state determination unit 135 determines that the mobile terminal 100 is in the one-hand gripping state, and proceeds to step S107. On the other hand, when the signal from the camera shake detection unit 131 indicates that there is no camera shake, the gripping state determination unit 135 determines that the mobile terminal 100 is placed and proceeds to step S109.

  In step S103, the exposure condition setting unit 145 sets the exposure condition in the image sensor 141 to a condition in a two-handed grip state (low ISO sensitivity, long exposure time). In step S107, the exposure condition setting unit 145 sets the exposure condition in the image sensor 141 to a condition in a one-handed grip state (high ISO sensitivity, short exposure time). In step S109, the exposure condition setting unit 145 sets the exposure condition in the image sensor 141 to the condition in the mounted state (low ISO sensitivity, long exposure time).

  As described above, according to the present embodiment, the exposure condition during imaging is set in advance before imaging in accordance with the gripping state of the mobile terminal 100. In addition, the exposure condition to be set differs depending on the stability of the posture based on the gripping state of the portable terminal 100. In the two-handed gripping state, the exposure condition is set with an emphasis on image quality, and in the one-handed gripping state, the exposure is less susceptible to camera shake. Set to the condition. In this manner, imaging suitable for the gripping state of the mobile terminal 100 can be performed without the user changing the setting. In the present embodiment, when the size of the casing 105 of the mobile terminal 100 in the longitudinal direction is such that when the user holds the mobile terminal 100 in the vertical direction by hand, both the upper and lower electrodes do not contact the hand. Suitable for.

  The mobile terminal 100 shown in FIG. 1 has electrodes on the left and right side surfaces of the housing 105, but has a configuration in which electrodes 107L1 and 107L2 are provided only on the left side surface of the housing 105 as shown in FIG. May be.

  Further, as illustrated in FIG. 7, an electrode 109 similar to the electrode 107 </ b> L <b> 2 may be provided on the lower right side of the back surface of the housing 105. The electrode 109 receives a weak current output from the electrode 107L1 through a conductor such as a user's hand.

  The electrodes 107R1, 107R2, 107L1, and 107L2 are weak current input / output terminals, but pressure sensors may be provided instead of the positions of the electrodes. In this case, the output signal of each pressure sensor is input to the gripping state determination unit 135 of the control unit 115, and the gripping state determination unit 135 determines the gripping state of the mobile terminal based on the signal from each pressure sensor. In addition, if a proximity touch panel is disposed on the display 101 without providing an electrode or a pressure sensor, the gripping state of the mobile terminal may be determined based on the proximity state of the user's hand or the like detected by the proximity touch panel. .

(Second Embodiment)
The appearance of the mobile terminal 200 of the second embodiment is the same as that of the mobile terminal 100 of the first embodiment shown in FIG. Further, the portable terminal 200 of the second embodiment is different from the portable terminal 100 of the first embodiment in a method for determining the gripping state of the mobile terminal by the gripping state determining unit of the control unit. FIG. 8 is a block diagram illustrating an internal configuration of the mobile terminal 200 according to the second embodiment. In FIG. 8, the same components as those of the mobile terminal 100 according to the first embodiment are denoted by the same reference numerals.

  The gripping state determination unit 235 of the control unit 215 included in the mobile terminal 200 according to the second embodiment adds to the presence or absence of a signal input to the electrodes 107R2 and 107L2 and adds a signal input to the electrodes 107R2 and 107L2 to the heart pulsation. Based on whether or not the resulting noise is included, the gripping state of the mobile terminal 200 is determined. In the present embodiment, when a signal equal to or higher than the threshold value is input to at least one of the electrode 107R2 and the electrode 107L2, and the noise is included in the signal, the gripping state determination unit 235 includes the mobile terminal 200. Is determined to be held with both hands. For example, when the portable terminal 100 is held with both hands, a weak current flows from the upper electrode 107R1 on the right side surface to the lower electrode 107R2 via the user's body as shown in FIG. A weak current flows from the upper electrode 107L1 to the lower electrode 107L2 via the user's torso. For this reason, noise caused by the pulsation of the user's heart is mixed in the signals input to the electrodes 107R2 and 107L2.

  When at least one of the electrode 107R2 and the electrode 107L2 is input with a signal equal to or higher than the threshold value, but the signal does not include the noise, the gripping state determination unit 235 holds the mobile terminal 200 with one hand. It is determined that the state has been changed. As in the first embodiment, when no signal equal to or greater than the threshold value is input to either the electrode 107R2 or the electrode 107L2, the gripping state determination unit 235 indicates that the mobile terminal 200 is gripped with one hand or It is determined that the hand is not gripped. For example, in the state where the mobile terminal 200 is held with one hand, as shown in FIG. 10, depending on the size of the mobile terminal 200 and the way the user holds the hand, both the upper electrode and the lower electrode are in contact with each other. A weak current flows from the upper electrode to the lower electrode. However, the path through which the weak current flows does not include the user's torso. For this reason, the signal input to the electrodes 107R2 and 107L2 is hardly mixed with noise caused by the pulsation of the heart.

  FIG. 11 is a flowchart illustrating the operation of the mobile terminal 200 according to the second embodiment. Similar to FIG. 5, the flowchart shown in FIG. 11 shows the determination of the gripping state of the mobile terminal 200 by the gripping state determination unit 235 of the control unit 215 and the exposure by the exposure condition setting unit 145 of the imaging unit 117 according to the determination result. The setting of conditions will be described. In FIG. 11, the same steps as those shown in FIG. 5 are denoted by the same reference numerals.

  As shown in FIG. 11, the gripping state determination unit 235 determines whether or not a signal equal to or higher than the threshold value is input to the electrodes 107R2 and 107L2 (step S201). If a signal equal to or higher than the threshold value is input to at least one of the electrode 107R2 and the electrode 107L2, the process proceeds to step S203. On the other hand, when a signal equal to or greater than the threshold value is not input to either the electrode 107R2 or the electrode 107L2, the gripping state determination unit 235 determines that the mobile terminal 200 is in the one-hand gripping state or the placement state, as in the first embodiment. Then, the process proceeds to step S105.

  In step S203, the gripping state determination unit 235 determines whether or not the signal input to the electrodes 107R2 and 107L2 includes noise due to heart pulsation. If the noise is included in the signal, the gripping state determination unit 235 determines that the mobile terminal 100 is in the two-handed gripping state, and proceeds to step S103. On the other hand, if the signal does not include the noise, the gripping state determination unit 235 determines that the mobile terminal 200 is in the one-handed gripping state, and proceeds to step S107.

  As described above, in the present embodiment, when the weak current output from the electrodes 107R1 and 107L1 is input to the electrodes 107R2 and 107L2, the signal input to the electrodes 107R2 and 107L2 is caused by the pulsation of the user's heart. The holding state of the mobile terminal 100 is determined depending on whether or not noise is mixed. Therefore, even if the upper and lower electrodes are in contact with the hand when the user grips the mobile terminal 200 with the hand in the vertical direction, the gripping state of the mobile terminal 200 can be reliably determined.

(Third embodiment)
The appearance of the mobile terminal 300 of the third embodiment is the same as that of the mobile terminal 100 of the first embodiment shown in FIG. FIG. 12 is a block diagram illustrating an internal configuration of the mobile terminal 300 according to the third embodiment. Further, the portable terminal 300 of the third embodiment is different from the portable terminal 100 of the first embodiment in that the control unit 315 further includes an impedance characteristic analysis unit 339 and an exposure condition setting unit 345 of the imaging unit 317. And a method of storing data in the memory 119 by the camera shake detection unit 331. In FIG. 12, the same reference numerals are assigned to the same components as those of the mobile terminal 100 of the first embodiment.

  The impedance characteristic analysis unit 339 analyzes the impedance characteristic of the user holding the mobile terminal 300 based on the signals input to the electrodes 107R2 and 107L2. Furthermore, the impedance characteristic analysis unit 339 specifies a user corresponding to the analyzed impedance characteristic from data stored in the memory 119 in advance. The impedance characteristic analysis unit 339 notifies the identified user to the exposure condition setting unit 345, the camera shake detection unit 331, and the camera function processing unit 137 of the imaging unit 317.

  The exposure condition setting unit 345 reads, from the memory 119, the exposure condition in the state of holding both hands corresponding to the user notified from the impedance characteristic analysis unit 339. The memory 119 stores exposure conditions when it is determined that the hand is held by each different user. The exposure condition setting unit 345 sets the exposure condition read from the memory 119 before imaging according to the determination result by the gripping state determination unit 135 of the control unit 315.

  When the user is specified by the impedance characteristic analysis unit 339, the camera shake detection unit 331 associates the camera shake data with the user specified by the impedance characteristic analysis unit 339 and stores it in the memory 119 at the time of imaging.

  FIG. 13 is a flowchart illustrating the operation of the mobile terminal 300 according to the third embodiment. The flowchart shown in FIG. 13 shows the determination of the gripping state of the mobile terminal 200 by the gripping state determination unit 135 of the control unit 315, the setting of the exposure condition by the exposure condition setting unit 345 of the imaging unit 317 according to the determination result, and the imaging The imaging by the unit 317 will be described. In FIG. 13, the same steps as those shown in FIG. 5 are denoted by the same reference numerals.

  As illustrated in FIG. 13, the gripping state determination unit 135 determines the gripping state of the mobile terminal 300 according to whether or not a signal equal to or greater than the threshold value is input to the electrodes 107R2 and 107L2 (step S101). When a signal equal to or greater than the threshold value is input to at least one of the electrode 107R2 and the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 300 is in the both-hands gripping state, and proceeds to step S301. On the other hand, when a signal equal to or greater than the threshold value is not input to either the electrode 107R2 or the electrode 107L2, the gripping state determination unit 135 determines that the mobile terminal 300 is in the one-hand gripping state or the placement state, and proceeds to step S105. After step S105, similarly to the first embodiment, step S107 or step S109 is performed, and the imaging unit 317 performs imaging (step S309).

  In step S301, the impedance characteristic analysis unit 339 analyzes the impedance characteristic of the user holding the mobile terminal 300 and identifies the user. Next, the exposure condition setting unit 345 reads the exposure condition in the two-handed grip state corresponding to the specified user from the memory 119, and sets the exposure condition (step S303). After step S303, when the imaging unit 317 captures an image (step S305), the camera shake detection unit 331 of the control unit 315 associates camera shake data based on the signal obtained from the acceleration sensor 111 with the specified user and stores the data. It is stored in 119 (step S307).

  As described above, according to the present embodiment, when the user holds the portable terminal 300 with both hands, the user is specified by personal authentication based on impedance characteristics, and exposure conditions suitable for the user are set. In addition, since the camera shake data obtained at the time of imaging and the user are associated with each other and stored in the memory 119, an optimal exposure condition can be set based on the camera shake data for each user accumulated in the memory 119.

  In addition, although this embodiment was demonstrated based on the comparison with the structure and method of 1st Embodiment, the analysis of an impedance characteristic, the specification of a user, and specification were specified to the structure and method of 2nd Embodiment. You may set the exposure conditions based on a user.

  The mobile terminal according to the present invention is useful as a mobile terminal that performs control for imaging according to the gripping state of the mobile terminal.

100, 200, 300 Mobile terminal 101 Display 103 Lens 105 Case 107R1, 107R2, 107L1, 107L2 Electrode 111 Acceleration sensor 113 Operation unit 115, 215, 315 Control unit 117, 317 Imaging unit 119 Memory 121 Touch panel 123 Key input unit 131, 331 Camera shake detection unit 133 Weak current output processing units 135 and 235 Grasping state determination unit 137 Camera function processing unit 141 Image sensor 143 Image processing units 145 and 345 Exposure condition setting unit 339 Impedance characteristic analysis unit

Claims (4)

A housing,
An imaging unit;
A contact detection unit for detecting a contact state with the casing by a person holding the casing;
A gripping state determination unit that determines a gripping state of the housing based on a detection result of the contact detection unit;
An exposure condition setting unit that sets an exposure condition suitable for the gripping state of the housing determined by the gripping state determination unit in the imaging unit;
Mobile terminal equipped with. The mobile terminal according to claim 1,
The contact detector is
An output unit for outputting an electrical signal;
An input unit capable of inputting an electrical signal output from the output unit,
When the person holding the case is in contact with the case when taking an image, when the person holding the case holds the case with one hand, either the output unit or the input unit When one of them does not touch the hand and a person holding the case holds the case with both hands, the output unit and the input unit are placed at positions where both the output unit and the input unit are in contact with the hand. Each input unit is disposed on the housing,
The portable terminal that determines that the gripping state determination unit is in a two-handed gripping state when an electric signal is input to the input unit, and determines that the gripping state is a one-handed gripping state if no electric signal is input to the input unit. The mobile terminal according to claim 1,
The contact detector is
An output unit for outputting an electrical signal;
An input unit capable of inputting an electrical signal output from the output unit,
When the person holding the case is in contact with the case when imaging, when the person holding the case holds the case with both hands, the output unit and the input unit are respectively The output unit and the input unit are respectively arranged on the housing at positions where the left and right hands come into contact with each other,
The gripping state discriminating unit discriminates a two-handed gripping state if the electrical signal input to the input unit includes noise caused by the pulsation of the heart of the person gripping the housing, and inputs it to the input unit. A portable terminal that discriminates a hand-held state if the noise is not included in the electrical signal. The mobile terminal according to claim 2 or 3,
Based on the electrical signal input to the input unit, comprising an impedance characteristic analysis unit for analyzing the impedance characteristics of the person holding the housing,
The said exposure condition setting part is a portable terminal which sets the exposure condition according to the person corresponding to the impedance characteristic which the said impedance characteristic analysis part analyzed to the said imaging part.

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