JP2009246424A - Electronic imaging apparatus and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To switch from a low power consumption mode to a normal mode by accurately detecting or predicting the posture of a present apparatus that a user tries to operate. <P>SOLUTION: The electronic imaging apparatus comprises: imaging means 3, 4 and 5; a power supply part 6 which is capable of setting the normal mode or the low power consumption mode, supplies power required for the imaging means 3, 4 and 5 to perform imaging to the imaging parts 3, 4 and 5 when the normal mode is set, and supplies standby power to the imaging means 3, 4 and 5 when the low power consumption mode is set; a posture detection part 7 which detects the posture of a video camera 1 at a prescribed time interval; a posture storage part 9 which stores posture information when the storage of the posture information is requested; a comparison part 10 which determines whether or not a difference between the value of the detected posture information and the value of the posture information stored in the posture storage part 9 is within a prescribed threshold; and a power mode switching part 11 which sets the normal mode to the power supply part 6 when it is determined that the difference value of the posture information is within the prescribed threshold. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic imaging apparatus and an electronic apparatus that can accurately detect or predict the attitude of the apparatus that a user intends to operate and can switch from a low power consumption mode to a normal mode.

  In recent years, portable electronic devices such as video cameras and portable players have become widespread.

  In order to save power consumption, such a portable electronic device has a power mode switching function for stopping power supply or switching from a normal mode to a low power consumption mode when the user is not performing an operation. Some have.

  However, in the portable electronic device having the power mode switching function, the power supply is stopped or the low power consumption mode is switched while the user is not operating, so the user tries to perform the operation. In this case, it took a considerable amount of time to return to the normal mode, which made the user uncomfortable. In particular, when a user uses a video camera having a power mode switching function, it may sometimes fail to take a scene until the normal mode is restored.

Therefore, the imaging device described in Patent Document 1 includes two acceleration sensors that detect the movement acceleration of the imaging device, and whether the imaging device is in a shooting state or a non-shooting state based on detection results by the two acceleration sensors. A technique has been proposed that includes a shooting state determination unit that determines whether or not there is a function, and a functional operation control unit that switches and controls activation / deactivation of a predetermined functional portion in the imaging apparatus based on a determination result by the shooting state determination unit. . Specifically, when the detected values detected by the two acceleration sensors are relatively close and the absolute value is small, it is estimated that the image is in a shooting state, and the detected values detected by the two acceleration sensors are relatively separated from each other. If the absolute value is large, it is estimated that the camera is in a non-shooting state.
JP-A-5-292359

  However, in the technique described in Patent Document 1, it is determined whether the imaging apparatus is in a shooting state or a non-shooting state based only on the detection results of the two acceleration sensors. In some cases, the state to be detected cannot be detected accurately. For example, when the user does not try to shoot but does not move the imaging apparatus so much, the technique described in Patent Document 1 may determine the shooting state. In such a case, power is wasted. It was sometimes consumed.

  The present invention has been made in view of the above problems, and an electronic imaging device capable of accurately detecting or predicting the posture of the device to be operated by the user and switching from the low power consumption mode to the normal mode. And an electronic device.

  In order to achieve the above object, a first feature of the electronic imaging apparatus according to the present invention is provided with an imaging element (3) that converts light incident from the optical system (2) into an electrical signal, and is supplied from the outside. The photographing means (2, 3, 4, 5) for photographing based on the operation signal and the normal mode or the low power consumption mode can be set. When the normal mode is set, the photographing means ( 2, 3, 4, 5) supplies power necessary for photographing to the photographing means (2, 3, 4, 5), and when the low power consumption mode is set, the photographing means ( 2, 3, 4, 5), and a power supply unit (6) that supplies standby power that is less than the power supplied in the normal mode, and the state of the posture of the electronic imaging device (1) at predetermined time intervals. Attitude detection means (7) for detecting the first value and the normal mode When an operation signal requesting storage of the posture of the electronic imaging device (1) is supplied from the outside, the first value detected by the posture detection means (7) at that time is set as the second value. Attitude storage means (9) stored as the first value detected at the predetermined time interval by the attitude detection means (7), and the second value stored in the attitude storage means (9). A comparison means (10) for determining whether or not a difference from a value is within a predetermined threshold; and a case in which the difference between the first value and the second value is determined to be within a predetermined threshold In addition, the power supply means (6) includes a power mode switching means (11) for setting the normal mode.

  In order to achieve the above object, a second feature of the electronic imaging apparatus (1A) according to the present invention is that a predetermined number of consecutive first values detected by the posture detection means (7) A fourth value indicating the state of the posture of the electronic imaging apparatus (1A) after a predetermined time is stored in the predetermined time based on the stored third value for the predetermined number of times. Posture prediction means (13) for calculating at intervals, and the comparison means (10A) includes the fourth value calculated at the predetermined time interval by the posture prediction means (13) and the posture memory. It is to determine whether or not the difference from the second value stored in the means (9) is within a predetermined threshold value.

  In order to achieve the above object, the first feature of the electronic device (1B) according to the present invention is that a display unit (12, 14, 5) including a display panel (12) for displaying an image and a normal mode or low consumption. The power mode can be set. When the normal mode is set, the display panel (12) supplies the display unit (12, 14, 5) with power necessary for displaying an image. When the low power consumption mode is set, the power supply means (15) for supplying standby power less than the power supplied in the normal mode to the display unit (12, 14, 5), and a predetermined time At an interval, an attitude detecting means (7) for detecting a first value indicating the attitude state of the electronic device (1B), and an operation for requesting storage of the attitude of the electronic device (1B) in the normal mode. Signal supplied from outside In this case, the posture storage means (9) for storing the first value detected by the posture detection means (7) at that time as the second value and the posture detection means (7) at the predetermined time interval. Comparing means (10) for determining whether or not a difference between the detected first value and the second value stored in the posture storage means (9) is within a predetermined threshold; Power supply mode switching means (11) for setting the normal mode in the power supply means (15) when it is determined that the difference between the first value and the second value is within a predetermined threshold value. Be prepared.

  In order to achieve the above object, a second feature of the electronic apparatus according to the present invention is that a predetermined number of consecutive first values detected by the posture detection means (7) are sequentially stored as a third value. At the same time, based on the stored predetermined number of the third values, a posture prediction means for calculating a fourth value indicating the posture state of the electronic device after a predetermined time at the predetermined time interval ( 13), and the comparison means (10A) is stored in the posture storage means (9) and the fourth value calculated by the posture prediction means (13) at the predetermined time interval. It is to determine whether or not the difference from the second value is within a predetermined threshold.

  According to the electronic imaging device and the electronic device according to the present invention, it is possible to accurately detect or predict the posture of the device that the user intends to operate and switch from the low power consumption mode to the normal mode.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In Embodiment 1 of the present invention, a video camera to which an imaging electronic apparatus that switches between a normal mode and a low power consumption mode based on the current attitude is applied will be described.

≪Configuration of video camera≫
FIG. 1 is a configuration diagram illustrating a configuration of a video camera to which the imaging electronic device according to the first embodiment of the present invention is applied.

  As shown in FIG. 1, a video camera 1 to which the imaging electronic apparatus according to the first embodiment of the present invention is applied includes an optical lens 2, an imaging element unit 3, an MPEG encoder 4, a drive 5, and a power supply unit 6. A posture detection unit 7, a user interface unit 8, a posture storage unit 9, a comparison unit 10, and a power mode switching unit 11.

  The optical lens 2 condenses image light of an image to be photographed on the image sensor unit 3.

  The imaging element unit 3 converts the image light collected by the optical lens 2 into an electrical signal. The optical lens 2 includes a driving unit for driving the lens.

  The MPEG encoder 4 performs encoding, that is, digital compression processing, on the electrical signal converted by the image sensor unit 3 to generate stream information.

  For example, when an optical disc is inserted, the drive 5 writes stream information on the inserted optical disc and reads stream information recorded on the optical disc.

  The power supply unit 6 supplies power to the optical lens 2, the image sensor unit 3, the MPEG encoder 4, and the drive 5. The power supply unit 6 can set the normal mode or the low power consumption mode. When the normal mode is set, the optical lens 2, the image sensor unit 3, the MPEG encoder 4, and the drive 5 are normally set. Electric power necessary for operation is supplied to the optical lens 2, the image sensor unit 3, the MPEG encoder 4, and the drive 5, respectively, and when the low power consumption mode is set, the optical lens 2 and the image sensor unit 3 are set. Standby power is supplied to the MPEG encoder 4 and the drive 5, respectively.

  Here, the normal mode is a mode that is set to supply power necessary for the normal operation of the optical lens 2, the imaging device unit 3, the MPEG encoder 4, and the drive 5. In the case of a rotating storage medium writing / reading device, the state in which the rotational storage medium is rotationally driven may be the normal mode, and the state in which the rotational driving medium is stopped may be the low power consumption mode. However, the state in which the stream information generated by the MPEG encoder 4 is recorded may be the normal mode, and the state in which the stream information generated by the MPEG encoder 4 is not recorded may be the low power consumption mode.

  In any case, in the low power consumption mode, less power (standby power) than that supplied in the normal mode is supplied.

  Further, the state where the MPEG encoder 4 is encoding may be set as the normal mode, and the state where the MPEG encoder 4 is not encoded may be set as the low power consumption mode.

  Note that power is always supplied to the posture detection unit 7, the user interface unit 8, the posture storage unit 9, the comparison unit 10, and the power supply mode switching unit 11.

  The posture detection unit 7 detects the posture of the video camera 1 at a predetermined time interval when the power supply unit 6 is set to the low power consumption mode, and uses the detected posture as posture information for the posture storage unit 9 and It supplies to the comparison part 10. Specifically, the posture detection unit 7 includes a level, and supplies the inclination angle measured by the level to the posture storage unit 9 and the comparison unit 10 as posture information.

  The user interface unit 8 generates an operation signal based on a user's operation, and supplies the generated operation signal to the posture detection unit 7, the posture storage unit 9, and the power supply mode switching unit 11.

  The posture storage unit 9 includes a storage medium such as a nonvolatile semiconductor memory, and when an operation signal for requesting storage of posture information of the video camera 1 is supplied from the user interface unit 8 in the normal mode, The posture information supplied by the posture detector 7 immediately before is stored.

  The comparison unit 10 determines whether or not the difference between the posture information supplied from the posture detection unit 7 and the posture information stored in the posture storage unit 9 is within a predetermined threshold.

  The power supply mode switching unit 11 sets the normal mode in the power supply unit 6 when it is determined that the difference in posture information is within a predetermined threshold.

≪Operation of video camera 1≫
Hereinafter, the operation of the video camera 1 to which the imaging electronic apparatus according to the first embodiment of the present invention is applied will be described.

  FIG. 2 is a flowchart showing a processing flow of the video camera 1 to which the imaging electronic apparatus according to the first embodiment of the present invention is applied.

  As shown in FIG. 2, when the power supply unit 6 is set to the normal mode by the power mode switching unit 11 (step S <b> 101), when an operation for requesting storage of posture information is performed by the user, the user interface The unit 8 generates an operation signal for requesting storage of posture information, and supplies the generated operation signal to the posture detection unit 7 and the posture storage unit 9 (step S102).

  When an operation signal for requesting storage of posture information is supplied from the user interface unit 8, the posture detection unit 7 measures an inclination angle at the time when the operation signal is supplied, and the posture storage unit 9 uses the inclination angle as posture information. To supply.

  Then, when an operation signal for requesting storage of posture information is supplied from the user interface unit 8, the posture storage unit 9 stores the posture information supplied from the posture detection unit 7 (step S103).

  Next, when an operation for requesting the setting change to the low power consumption mode is performed by the user, the user interface unit 8 generates an operation signal requesting the setting change to the low power consumption mode, and this generated The operation signal is supplied to the power supply mode switching unit 11 and the posture detection unit 7 (step S104).

  Then, when the operation signal for requesting the setting change to the low power consumption mode is supplied from the user interface unit 8, the power mode switching unit 11 sets the low power consumption mode in the power supply unit 6 (step S <b> 105).

  Next, the posture detection unit 7 to which the operation signal for requesting the setting change to the low power consumption mode is supplied from the user interface unit 8 starts posture detection processing (step S106). Specifically, the posture detection unit 7 measures the tilt angle of the video camera 1 at a predetermined time interval using a level provided therein, and uses the measured tilt angle as posture information. The posture information is used for a predetermined time. It supplies to the comparison part 10 at intervals.

  Here, if the predetermined time interval is too long, determination by the comparison unit 10 described later is delayed, so that it cannot be appropriately changed to the normal mode, and if it is too short, the apparatus load increases. For this reason, it is necessary for the provider or the like to set an appropriate value based on actual measurement in advance, for example, 0.1 seconds.

  Next, when posture information is supplied from the posture detection unit 7 (step S107), the comparison unit 10 receives the posture information value supplied from the posture detection unit 7 and the posture information stored in the posture storage unit 9. The difference between the calculated value and the posture information is calculated, and it is determined whether or not the calculated difference value of the posture information is within a predetermined threshold (step S108).

  Here, if this threshold is too high, the setting may be changed to the normal mode when the user is not trying to shoot, that is, when the video camera 1 is in a non-shooting posture. There are cases where the setting is not changed to the low power consumption mode when shooting is performed, that is, when the video camera 1 is in the shooting posture. For this reason, it is necessary for the provider or the like to calculate and set in advance an appropriate value based on actual measurement.

  The power supply mode switching unit 11 sets the normal mode in the power supply unit 6 when the comparison unit 10 determines in step S108 that the difference in posture information is within a predetermined threshold (step S109).

  As described above, according to the video camera 1 to which the imaging electronic apparatus according to the first embodiment of the present invention is applied, the posture information measured at predetermined time intervals by the posture detector 7 and the posture information stored in the posture storage unit 9. Since the low power consumption mode is switched from the normal mode to the normal mode based on the posture information at the time desired by the user, the state in which the user intends to shoot, that is, the photographing posture is accurately detected and the low power consumption mode is changed to the normal mode Can be switched.

  As a result, the user can start shooting using the video camera 1 quickly, so that the user-desired video can be shot without losing the scene until the normal mode is restored.

  In the video camera 1 to which the imaging electronic apparatus according to the first embodiment of the present invention is applied, when the user performs an operation for requesting a setting change to the low power consumption mode, the power supply mode switching unit 11 performs the power supply unit. Although the low power consumption mode is set to 6, the power mode switching unit 11 automatically sets the low power consumption mode to the power supply unit 6 when no operation signal is supplied from the user interface unit 8 for a predetermined time. It may be.

  FIG. 3A is a diagram schematically illustrating the shooting posture of the video camera 1, and FIG. 3B is a diagram schematically illustrating the non-shooting posture of the video camera 1.

  As shown in FIG. 3A, the user A takes a picture of the tree C while the video camera 1 is set to the normal mode. At the position, an operation for requesting storage of posture information of the B position of the video camera 1 is performed from the user interface unit 8.

  When this operation is performed, the user interface unit 8 supplies an operation signal for requesting storage of posture information to the posture storage unit 9, and the posture storage unit 9 supplied with the operation signal is supplied from the posture detection unit 7. Posture information at point B is stored.

  Next, the user A performs an operation for requesting a setting change to the low power consumption mode from the user interface unit 8.

  When this operation is performed, the user interface unit 8 generates an operation signal for requesting a setting change to the low power consumption mode, and the generated operation signal is transmitted to the power mode switching unit 11 and the posture detection unit 7. Supply.

  Thereby, the power supply mode switching unit 11 sets the low power consumption mode in the power supply unit 6, and the posture detection unit 7 starts the posture detection process.

  Thereafter, as shown in FIG. 3B, the user A causes the video camera 1 to stand by in a posture such as the E position of the video camera 1.

  Then, when the user A captures the tree C, which is the object to be imaged, again, the user A moves the video camera 1 from the position E shown in FIG. 3B to the position B shown in FIG. .

  At this time, the video camera 1 has a difference value between the posture information measured at a predetermined time interval by the posture detector 7 and the posture information at a user desired time stored in the posture storage unit 9 within a predetermined threshold value. When it is determined that the low power consumption mode is switched to the normal mode.

  Thereby, the video camera 1 can be switched from the low power consumption mode to the normal mode when the video camera 1 is in the shooting posture.

  In the first embodiment of the present invention, the video camera 1 to which the imaging electronic device that switches between the normal mode and the low power consumption mode based on the current attitude is applied has been described. In a second embodiment of the present invention, a video camera to which an imaging electronic apparatus that predicts a posture after a predetermined time and switches between a normal mode and a low power consumption mode based on the predicted posture will be described.

≪Configuration of video camera≫
FIG. 4 is a configuration diagram illustrating a configuration of a video camera to which the imaging electronic device according to the second embodiment of the present invention is applied.

  As shown in FIG. 4, the video camera 1A to which the imaging electronic apparatus according to the second embodiment of the present invention is applied includes an optical lens 2, an imaging element unit 3, an MPEG encoder 4, a drive 5, and a power supply unit 6. A posture detection unit 7, a user interface unit 8, a posture storage unit 9, a comparison unit 10 </ b> A, a power supply mode switching unit 11, and a posture prediction unit 13.

  Here, among the configurations included in the video camera 1A, the optical lens 2, the image sensor unit 3, the MPEG encoder 4, the drive 5, the power supply unit 6, the attitude detection unit 7, the user interface unit 8, Since the posture storage unit 9 and the power supply mode switching unit 11 are the same as those of the video camera 1 to which the imaging electronic device according to the first embodiment of the present invention is applied, the same reference numerals are given. Omitted.

  The comparison unit 10A determines whether or not a difference value between the posture information value calculated by the posture prediction unit 13 and the posture information value stored in the posture storage unit 9 is within a predetermined threshold.

  The posture prediction unit 13 includes a temporary storage unit inside, and stores, for example, three pieces of posture information detected by the posture detection unit 7 at predetermined time intervals. Specifically, the posture prediction unit 13 sequentially stores the posture information supplied from the posture detection unit 7 in association with the supplied time in the temporary storage means, and always keeps three from the newest time. At the same time, the posture information whose time has become old is deleted.

  Further, the posture prediction unit 13 calculates the value of the posture information of the video camera 1A after a predetermined time based on the stored three posture information values. A method for calculating the value of posture information by the posture prediction unit 13 will be described later.

<< Operation of video camera 1A >>
The operation of the video camera 1A to which the imaging electronic device according to the second embodiment of the present invention is applied will be described below.

  FIG. 5 is a flowchart showing a processing flow of the video camera 1A to which the imaging electronic apparatus according to the second embodiment of the present invention is applied.

  As shown in FIG. 5, when the power supply unit 6 is set to the normal mode by the power mode switching unit 11 (step S <b> 201), when an operation for requesting storage of posture information is performed by the user, the user interface The unit 8 generates an operation signal for requesting storage of posture information, and supplies the generated operation signal to the posture detection unit 7 and the posture storage unit 9 (step S202).

  When an operation signal for requesting storage of posture information is supplied from the user interface unit 8, the posture detection unit 7 measures an inclination angle at the time when the operation signal is supplied, and the posture storage unit 9 uses the inclination angle as posture information. To supply.

  Then, when the operation signal for requesting the storage of the posture information is supplied from the user interface unit 8, the posture storage unit 9 stores the posture information supplied from the posture detection unit 7 (step S203).

  Next, when an operation for requesting the setting change to the low power consumption mode is performed by the user, the user interface unit 8 generates an operation signal requesting the setting change to the low power consumption mode, and this generated An operation signal is supplied to the power supply mode switching part 11 and the attitude | position detection part 7 (step S204).

  Then, when the operation signal for requesting the setting change to the low power consumption mode is supplied from the user interface unit 8, the power supply mode switching unit 11 sets the low power consumption mode in the power supply unit 6 (step S205).

  Next, the posture detection unit 7 to which the operation signal for requesting the setting change to the low power consumption mode is supplied from the user interface unit 8 starts posture detection processing (step S206). Specifically, the posture detection unit 7 measures the tilt angle of the video camera 1 at a predetermined time interval using a level provided therein, and uses the measured tilt angle as posture information. The posture information is used for a predetermined time. Supplied to the posture prediction unit 13 at intervals.

  Here, if the predetermined time interval is too long, determination by the comparison unit 10A described later is delayed, so that it is impossible to appropriately change to the normal mode, and if it is too short, the apparatus load increases. Therefore, an appropriate value based on actual measurement is set in advance by a provider or the like, for example, 0.1 seconds.

  Next, when posture information is supplied from the posture detection unit 7 (step S207), the posture prediction unit 13 predicts the posture of the video camera 1 after a predetermined time (step S208). Specifically, the posture prediction unit 13 stores a predetermined number of posture information supplied from the posture detection unit 7, and after a predetermined time based on the stored number of posture information values. The attitude information value of the video camera 1A is calculated.

  FIGS. 6A and 6B are diagrams illustrating the calculation processing of the posture information value of the video camera 1A after a predetermined time by the posture prediction unit 13. FIG.

  FIG. 6A shows a state where the user is not going to shoot, that is, a case where the video camera 1A is held in a non-shooting posture, and FIG. 6B shows that the user wants to shoot. This shows a state in which the video camera 1A is moved to the shooting posture.

  As shown in FIG. 6A, when the posture information of the point c is supplied from the posture detection unit 7 at the time point t3, the posture prediction unit 13 stores the supplied posture information of the point c. Based on the transition state of the posture information values at three points a, b, and c, which are posture information from time t1 to time t3, the value of posture information at point d at time t4 after a predetermined time is calculated.

  In FIG. 6B, when the posture information of the g point is supplied from the posture detection unit 7 at time t7, the posture prediction unit 13 stores the supplied posture information of the g point. Based on the transition state of the posture information values of the three points e, f, and g, which are posture information from time t5 to time t7, the value of posture information at point h at time t8 after a predetermined time is calculated.

  If the time from the time point t3 to the time point t4 shown in FIG. 6A or the time point from the time point t7 to the time point t8 shown in FIG. 6B is too long, the video camera 1 is in a non-shooting posture. In addition, the setting may be changed to the normal mode. If the setting is too low, the setting to the low power consumption mode may be delayed. Therefore, it is necessary for a provider or the like to set an appropriate value based on actual measurement in advance.

  Next, the comparison unit 10A determines whether or not the difference value between the posture information value calculated by the posture prediction unit 13 and the posture information value stored in the posture storage unit 9 is within a predetermined threshold. (Step S209).

  In the diagram shown in FIG. 6A, X indicates the posture information lower limit value, and Y indicates the posture information upper limit value. That is, if the value of the posture information calculated by the posture prediction unit 13 is a value between the posture information lower limit value X and the posture information upper limit value Y, the comparison unit 10A determines that the difference value of the posture information is a predetermined value. It is determined that it is within the threshold.

  Since the posture information value at the point d calculated by the posture prediction unit 13 at time t4 is not a value within the range of X to Y, the comparison unit 10A has the difference value of the posture information exceeding a predetermined threshold value. Is determined.

  On the other hand, as shown in FIG. 6B, since the value of the posture information at the point h calculated by the posture prediction unit 13 is a value within the range of X to Y, the comparison unit 10A It is determined that the difference value of information is within a predetermined threshold.

  Here, if the threshold is too high, the setting may be changed to the normal mode when the video camera 1 is in the non-shooting posture. If the threshold is too low, the threshold is low when the video camera 1 is in the shooting posture. The setting may not be changed to the power consumption mode. Therefore, an appropriate value is set in advance by a provider or the like based on actual measurement.

  In step S209, the power supply mode switching unit 11 causes the power supply unit 6 to switch to the normal mode when the comparison unit 10A determines that the difference value of the posture information, that is, the difference value of the inclination angle is within a predetermined threshold. Is set (step S210).

  As described above, according to the video camera 1A to which the imaging electronic device according to the second embodiment of the present invention is applied, the posture information calculated by the posture prediction unit 13 at predetermined time intervals and the posture storage unit 9 are stored. The low power consumption mode is switched from the low power consumption mode to the normal mode based on the posture information at the time desired by the user. To normal mode.

  Thereby, since the user can start shooting using the video camera 1A more quickly, it is possible to shoot a video desired by the user without losing the scene until the normal mode is restored.

  In the first embodiment of the present invention, the video camera to which the imaging electronic device that switches between the normal mode and the low power consumption mode based on the current attitude has been described. In Embodiment 3 of the present invention, a portable image display device to which an electronic device that switches between a normal mode and a low power consumption mode based on the current attitude is applied will be described.

≪Configuration of portable image display device≫
FIG. 7 is a configuration diagram illustrating a configuration of a portable image display device to which the electronic device according to the third embodiment of the present invention is applied.

  As shown in FIG. 7, the portable image display apparatus 1B to which the electronic apparatus according to the third embodiment of the present invention is applied includes a display 12, an MPEG decoder 14, a drive 5, a power supply unit 15, and an attitude detection unit. 7, a user interface unit 8, a posture storage unit 9, a comparison unit 10, and a power mode switching unit 11.

  Here, among the configurations of the portable image display device 1B, the drive 5, the power supply unit 6, the posture detection unit 7, the user interface unit 8, the posture storage unit 9, and the power mode switching unit 11 are as follows. Since the video camera 1 to which the imaging electronic device according to the first embodiment of the present invention is applied has the same configuration as that of the video camera 1, the description is omitted.

  The display 12 includes image output means such as an organic EL (electroluminescence) display and a liquid crystal display, and displays an image based on an output signal supplied from the MPEG decoder 14.

  The MPEG decoder 14 decodes the data supplied from the drive 5 and supplies it to the display 12 as an output signal.

  The power supply unit 15 supplies power to the display 12, the MPEG decoder 14, and the drive 5. The power supply unit 15 can set the normal mode or the low power consumption mode, and is necessary for the display 12, the MPEG decoder 14, and the drive 5 to perform normal operation when the normal mode is set. When the low power consumption mode is set, standby power is supplied to the display 12, the MPEG decoder 14, and the drive 5, respectively.

  Here, the normal mode is a mode set to supply power necessary for normal operation of the display 12, the MPEG decoder 14, and the drive 5. For example, when the display 12 is a liquid crystal panel, the state where the backlight is lit may be set as the normal use mode, and the case where the backlight is not lit is set as the low power consumption mode.

  When the drive 5 is a rotating storage medium writing / reading device, the state where the rotating storage medium is driven to rotate is the normal use mode, and the state where the rotation of the rotating drive medium is stopped is the low power consumption mode. Alternatively, the state in which the drive 5 reads information recorded on the storage medium inserted in the drive 5 and supplies the information to the MPEG decoder 14 is the normal mode, and the state in which the drive 5 does not supply the MPEG decoder 14 is the low power consumption mode. It is good.

  Furthermore, the state in which the MPEG decoder 14 is decoding may be the normal mode, and the state in which the MPEG decoder 14 is not decoding may be the low power consumption mode.

<< Operation of portable image display device >>
The operation of the portable image display device 1B to which the electronic device of the third embodiment of the present invention is applied is the same as that of the video camera 1 to which the imaging electronic device of the first embodiment of the present invention shown in FIG. 2 is applied. Therefore, explanation is omitted.

  According to the portable image display device 1B to which the electronic device according to the third embodiment of the present invention is applied, the posture information generated at predetermined time intervals by the posture detector 7 and the user stored in the posture storage unit 9 are used. Since the low power consumption mode is switched from the low power consumption mode to the normal mode based on the posture information at a desired point in time, the state that the user intends to display on the display 12, that is, the viewing posture is accurately detected, and the low power consumption mode is started. Switch to normal mode.

  As a result, even when the portable image display device 1B is in the low power consumption mode, the portable image display device 1B switches to the normal power mode by holding the portable image display device 1B at a position where the user intends to view. The person can start watching the video immediately.

  Note that the imaging electronic device according to the second embodiment of the present invention is applied to a portable image display device, and the posture after a predetermined time is predicted, and the normal mode and the low power consumption mode are switched based on the predicted posture. Also good.

It is a block diagram which shows the structure of the video camera to which the imaging electronic device of Example 1 of this invention was applied. It is the flowchart which showed the processing flow of the video camera to which the imaging electronic device of Example 1 of this invention was applied. (A) is the figure which showed typically the attitude | position memory attitude | position and imaging | photography attitude | position of a video camera, (b) is the figure which showed typically the non-photographing attitude | position of a video camera. It is a block diagram which shows the structure of the video camera to which the imaging electronic device of Example 2 of this invention was applied. It is the flowchart which showed the processing flow of the video camera to which the imaging electronic device of Example 2 of this invention was applied. (A), (b) is the figure explaining the calculation process of the value of the attitude | position information of a video camera after the predetermined time by an attitude | position prediction part. It is a block diagram which shows the structure of the portable image display apparatus with which the electronic device of Example 3 of this invention was applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A ... Video camera 1B ... Portable image display apparatus 2 ... Optical lens (optical system) (photographing means)
3 ... Image sensor section (imaging means)
4. MPEG encoder (photographing means)
5 ... Drive (photographing means)
6, 15 ... Power supply unit 7 ... Attitude detection unit 8 ... User interface unit 9 ... Attitude storage unit 10, 10A ... Comparison unit 11 ... Power supply mode switching unit 12 ... Display 13 ... Attitude prediction unit 14 ... MPEG decoder

Claims (4)

An imaging device that includes an imaging device that converts light incident from the optical system into an electrical signal, and that performs imaging based on an operation signal supplied from the outside;
The normal mode or the low power consumption mode can be set, and when the normal mode is set, the photographing unit supplies power necessary for photographing to the photographing unit, and the low power consumption mode is set. A power supply means for supplying standby power less than the power supplied to the photographing means in the normal mode when set;
Posture detecting means for detecting a first value indicating the posture state of the electronic imaging device at a predetermined time interval;
In the normal mode, when an operation signal requesting storage of the attitude of the electronic imaging apparatus is supplied from the outside, the first value detected by the attitude detection unit at that time is stored as a second value. Posture memory means;
It is determined whether or not a difference between the first value detected at the predetermined time interval by the posture detection unit and the second value stored in the posture storage unit is within a predetermined threshold. A comparison means;
Power supply mode switching means for setting the normal mode to the power supply means when it is determined that the difference between the first value and the second value is within a predetermined threshold;
An electronic imaging apparatus comprising: A predetermined number of consecutive first values detected by the posture detecting means are sequentially stored as a third value, and after a predetermined time based on the stored third value of the third value. Posture prediction means for calculating a fourth value indicating the posture state of the electronic imaging device at the predetermined time interval,
The comparison means includes
It is determined whether or not a difference between the fourth value calculated at the predetermined time interval by the posture prediction unit and the second value stored in the posture storage unit is within a predetermined threshold. The electronic imaging apparatus according to claim 1. A display unit including a display panel for displaying an image;
The normal mode or the low power consumption mode can be set. When the normal mode is set, the display panel supplies power necessary for displaying an image to the display unit, and the low power consumption Power supply means for supplying standby power less than the power supplied in the normal mode to the display unit when the mode is set;
Posture detecting means for detecting a first value indicating the posture state of the electronic device at a predetermined time interval;
At the time of the normal mode, when an operation signal for requesting storage of the posture of the electronic device is supplied from the outside, the first value detected by the posture detection means at that time is stored as the second value Storage means;
It is determined whether or not a difference between the first value detected at the predetermined time interval by the posture detection unit and the second value stored in the posture storage unit is within a predetermined threshold. A comparison means;
Power supply mode switching means for setting the normal mode to the power supply means when it is determined that the difference between the first value and the second value is within a predetermined threshold;
An electronic device comprising: A predetermined number of consecutive first values detected by the posture detecting means are sequentially stored as a third value, and after a predetermined time based on the stored third value of the third value. A posture prediction means for calculating a fourth value indicating the posture state of the electronic device at the predetermined time interval;
The comparison means includes
It is determined whether or not a difference between the fourth value calculated at the predetermined time interval by the posture prediction unit and the second value stored in the posture storage unit is within a predetermined threshold. The electronic device according to claim 3.

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