JP2018136497A - Electronic apparatus, vehicle, control device, control program, and method for operating electronic apparatus - Google Patents

Abstract

A technique for reducing power consumption of an electronic device is provided.
An electronic apparatus includes a display unit and a control unit. A control part performs position control which controls the position with respect to the earth of the said image by controlling the display position of the image displayed on a display part based on the movement of an electronic device. The control unit determines whether or not to perform position control based on at least one condition including a predetermined condition whether or not the orientation of the display screen of the display unit is stable.
[Selection] Figure 3

Description

  The present disclosure relates to an electronic device.

  As described in Patent Document 1, various techniques have been proposed for electronic devices.

JP2015-141700A

  For electronic devices, reduction of power consumption is desired.

  Therefore, the present invention has been made in view of the above-described points, and an object thereof is to provide a technique that can reduce power consumption of an electronic device.

  An electronic device, a vehicle, a control device, a control program, and an operation method of the electronic device are disclosed. In one embodiment, an electronic device includes a display unit and a control unit. A control part performs position control which controls the position with respect to the earth of the said image by controlling the display position of the image displayed on a display part based on the movement of an electronic device. The control unit determines whether or not to perform position control based on at least one condition including a predetermined condition whether or not the orientation of the display screen of the display unit is stable.

  Moreover, in one embodiment, a vehicle is a vehicle provided with said electronic device.

  In one embodiment, a control device is a control device which controls the electronic equipment with which an electronic equipment provided with a display part is provided. The control device performs position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device. The control device determines whether or not to perform position control based on at least one condition including a predetermined condition whether or not the orientation of the display screen of the display unit is stable.

  In one embodiment, a control program is a control program for controlling electronic equipment provided with a display part. The control unit program causes the electronic device to execute steps (a) and (b). Step (a) is a step of performing position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device. Step (b) is a step of determining whether or not to perform position control based on at least one condition including a predetermined condition whether or not the orientation of the display screen of the display unit is stable.

  In one embodiment, the operation method of the electronic device is an operation method of the electronic device including the display unit. The operation method of the electronic device includes steps (a) and (b). Step (a) is a step of performing position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device. Step (b) is a step of determining whether or not to perform position control based on at least one condition including a predetermined condition whether or not the orientation of the display screen of the display unit is stable.

  The power consumption of electronic devices is reduced.

It is a perspective view which shows an example of the external appearance of an electronic device. It is a rear view which shows an example of the external appearance of an electronic device. It is a block diagram which shows an example of a structure of an electronic device. It is a block diagram which shows an example of a structure of an electronic device. It is a figure for demonstrating an example of image position control. It is a flowchart which shows an example of operation | movement of an electronic device. It is a figure which shows an example of the time change of the position of the image with respect to the earth. It is a flowchart which shows an example of operation | movement of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a block diagram which shows an example of a structure of an electronic device. It is a block diagram which shows an example of a structure of an electronic device.

<Appearance of electronic equipment>
1 and 2 are a perspective view and a rear view showing an example of the external appearance of the electronic apparatus 1. As shown in FIGS. 1 and 2, the electronic device 1 includes a plate-like device case 11 that is substantially rectangular in plan view. The device case 11 constitutes the exterior of the electronic device 1.

  On the front surface 11a of the device case 11, a display screen 121 on which various types of information such as characters, symbols, and figures are displayed. In this example, the display screen 121 is configured by a transparent portion included in the device case 11. A touch panel 130 described later is located on the back side of the display screen 121. Accordingly, the user can input various information to the electronic device 1 by operating the display screen 121 on the front surface of the electronic device 1 with a finger or the like. Note that the user can also input various types of information to the electronic apparatus 1 by operating the display screen 121 with an operation element other than a finger, for example, a touch panel pen such as a stylus pen.

  A receiver hole 12 is located at the upper end of the front surface 11 a of the device case 11. A speaker hole 13 is located at the lower end of the front surface 11a. A microphone hole 14 is located on the lower side surface 11 c of the device case 11.

  From the upper end portion of the front surface 11a of the device case 11, a lens 191 included in the first camera 190 described later is visible. As shown in FIG. 2, a lens 201 included in a second camera 200 described later is visible from the upper end of the back surface 11 b of the device case 11.

  The electronic device 1 includes an operation button group 140 including a plurality of operation buttons. Each of the plurality of operation buttons is a hardware button. Specifically, each of the plurality of operation buttons is a push button. Note that at least one operation button included in the operation button group 140 may be a software button displayed on the display screen 121.

  The operation button group 140 includes operation buttons 141, 142, and 143 located at the lower end of the front surface 11 a of the device case 11. The operation button group 140 includes a power button and a volume button (not shown) located on the surface of the device case 11.

  The operation button 141 is a back button, for example. The back button is an operation button for switching the display on the display screen 121 to the previous display. When the user operates the operation button 141, the display on the display screen 121 is switched to the previous display. The operation button 142 is a home button, for example. The home button is an operation button for displaying the home screen on the display screen 121. When the user operates the operation button 142, the home screen is displayed on the display screen 121. The operation button 143 is, for example, a history button. The history button is an operation button for displaying the history of the application executed on the electronic device 1 on the display screen 121. When the user operates the operation button 143, a history of applications executed on the electronic device 1 is displayed on the display screen 121.

  Hereinafter, the electronic apparatus 1 may be described using the XYZ orthogonal coordinate system shown in FIGS. The X-axis direction, the Y-axis direction, and the Z-axis direction are respectively set in the short side direction, the long side direction, and the thickness direction of the electronic device 1.

<Electrical configuration of electronic equipment>
FIG. 3 is a block diagram mainly showing an example of the electrical configuration of the electronic apparatus 1. As illustrated in FIG. 3, the electronic device 1 includes a control unit 100, a wireless communication unit 110, a display unit 120, a touch panel 130, an operation button group 140, and an acceleration sensor 150. The electronic device 1 further includes a receiver 160, a speaker 170, a microphone 180, a first camera 190, a second camera 200, and a battery 210. These components included in the electronic device 1 are housed in a device case 11.

  The control unit 100 can comprehensively manage the operation of the electronic device 1 by controlling other components of the electronic device 1. It can be said that the control unit 100 is a control device or a control circuit. The controller 100 includes at least one processor to provide control and processing capabilities to perform various functions, as described in further detail below.

  According to various embodiments, at least one processor is implemented as a single integrated circuit (IC) or as a plurality of communicatively connected integrated circuits (ICs) and / or discrete circuits. May be. The at least one processor can be implemented according to various known techniques.

  In one embodiment, the processor includes one or more circuits or units configured to perform one or more data computation procedures or processes, for example, by executing instructions stored in associated memory. In other embodiments, the processor may be firmware (eg, a discrete logic component) configured to perform one or more data computation procedures or processes.

  According to various embodiments, the processor may include one or more processors, controllers, microprocessors, microcontrollers, application specific integrated circuits (ASICs), digital signal processors, programmable logic devices, field programmable gate arrays, or the like. The functions described below may be performed including any combination of devices or configurations, or other known device and configuration combinations.

  In this example, the control unit 100 includes a CPU (Central Processing Unit) 101, a DSP (Digital Signal Processor) 102, and a storage unit 103. The storage unit 103 includes a non-transitory recording medium that can be read by the CPU 101 and the DSP 102, such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM included in the storage unit 103 is, for example, a flash ROM (flash memory) that is a nonvolatile memory. The storage unit 103 stores a plurality of control programs 103 a for controlling the electronic device 1. Various functions of the control unit 100 are realized by the CPU 101 and the DSP 102 executing various control programs 103 a in the storage unit 103.

  Note that the control unit 100 may include a plurality of CPUs 101. In this case, the control unit 100 may include a main CPU that performs relatively complicated processing and has a high processing capability, and a sub CPU that performs relatively simple processing and has a low processing capability. Further, the control unit 100 may not include the DSP 102 or may include a plurality of DSPs 102. Further, all the functions of the control unit 100 or a part of the functions of the control unit 100 may be realized by a hardware circuit that does not require software to realize the function.

  The storage unit 103 may include a computer-readable non-transitory recording medium other than the ROM and RAM. The storage unit 103 may include, for example, a small hard disk drive and an SSD (Solid State Drive).

  The plurality of control programs 103a in the storage unit 103 includes various applications (application programs). The storage unit 103 stores, for example, a call application for making a voice call and a video call, a browser for displaying a website, and a mail application for creating, browsing, and transmitting / receiving an e-mail. The storage unit 103 also has a camera application for photographing a subject using the first camera 190 and the second camera 200, and a recorded image display application for displaying still images and moving images recorded in the storage unit 103. In addition, a music reproduction control application for performing reproduction control of music data stored in the storage unit 103 is stored. At least one application in the storage unit 103 may be stored in the storage unit 103 in advance. Further, at least one application in the storage unit 103 may be one that the electronic device 1 has downloaded from another device and stored in the storage unit 103.

  The wireless communication unit 110 has an antenna 111. The wireless communication unit 110 can use the antenna 111 to perform wireless communication using a plurality of types of communication methods, for example. Wireless communication of the wireless communication unit 110 is controlled by the control unit 100.

  The wireless communication unit 110 can perform wireless communication with a base station of the mobile phone system. The wireless communication unit 110 can communicate with a mobile phone and a web server other than the electronic device 1 through the base station and a network such as the Internet. The electronic device 1 can perform data communication, voice call, video call, and the like with other mobile phones and the like.

  In addition, wireless communication can be performed using a wireless local area network (LAN) such as the wireless communication unit 110 or WiFi. The wireless communication unit 110 can perform short-range wireless communication. For example, the wireless communication unit 110 can perform wireless communication in conformity with Bluetooth (registered trademark). The wireless communication unit 110 may be capable of wireless communication based on at least one of ZigBee (registered trademark) and NFC (Near Field Communication).

  The wireless communication unit 110 performs various processing such as amplification processing on the signal received by the antenna 111, and outputs the processed received signal to the control unit 100. The control unit 100 performs various processes on the input received signal and acquires information included in the received signal. In addition, the control unit 100 outputs a transmission signal including information to the wireless communication unit 110. The wireless communication unit 110 performs various processing such as amplification processing on the input transmission signal, and wirelessly transmits the processed transmission signal from the antenna 111.

  The display unit 120 includes a display screen 121 located on the front surface of the electronic device 1 and a display panel 122. The display panel 122 is a liquid crystal display panel, for example, and includes a liquid crystal, a glass substrate, a polarizing plate, a backlight, and the like. The display panel 122 can display various information. The display panel 122 is opposed to the display screen 121 in the device case 11. As a result, information displayed on the display panel 122 is displayed on the display screen 121.

  As shown in FIG. 4, the control unit 100 includes a drive circuit 300 that drives the display panel 122. The CPU 101 can control the display panel 122 through the drive circuit 300. Note that the driving circuit 300 may be considered to be included in the display unit 120.

  The touch panel 130 can detect an operation with an operator such as a finger on the display screen 121. The touch panel 130 is, for example, a projected capacitive touch panel. The touch panel 130 is located on the back side of the display screen 121, for example. When the user operates the display screen 121 with an operator such as a finger, the touch panel 130 can input an electric signal corresponding to the operation to the control unit 100. The control unit 100 can specify the content of an operation performed on the display screen 121 based on an electrical signal (output signal) from the touch panel 130. And the control part 100 can perform the process according to the specified operation content. Note that instead of the display panel 122 and the touch panel 130, an in-cell display panel in which a touch panel is incorporated may be employed.

  When each operation button of the operation button group 140 is operated by a user, an operation signal indicating that the operation button is operated can be output to the control unit 100. Thereby, the control part 100 can judge whether the said operation button was operated about each operation button. When the control unit 100 to which the operation signal is input controls other components, the electronic device 1 executes a function assigned to the operated operation button.

  The microphone 180 can convert sound input from the outside of the electronic device 1 into an electrical sound signal and output the electrical sound signal to the control unit 100. Sound from the outside of the electronic device 1 is taken into the electronic device 1 from the microphone hole 14 and input to the microphone 180.

  The speaker 170 is, for example, a dynamic speaker. The speaker 170 can convert an electrical sound signal from the control unit 100 into a sound and output the sound. Sound output from the speaker 170 is output from the speaker hole 13 to the outside. The user can hear the sound output from the speaker hole 13 even at a location away from the electronic device 1.

  The receiver 160 can output a received sound. The receiver 160 is a dynamic speaker, for example. The receiver 160 can convert an electrical sound signal from the control unit 100 into a sound and output the sound. The sound output from the receiver 160 is output from the receiver hole 12 to the outside. The volume of the sound output from the receiver hole 12 is smaller than the volume of the sound output from the speaker hole 13. The user can hear the sound output from the receiver hole 12 by bringing his ear close to the receiver hole 12. Instead of the receiver 160, a vibration element such as a piezoelectric vibration element that vibrates the front surface portion of the device case 11 may be provided. In this case, the sound is transmitted to the user by the vibration of the front portion.

  The first camera 190 includes a lens 191 and an image sensor. The second camera 200 includes a lens 201 and an image sensor. Each of the first camera 190 and the second camera 200 can photograph a subject based on control by the control unit 100, generate a still image or a moving image indicating the photographed subject, and output the still image or moving image to the control unit 100. .

  The lens 191 of the first camera 190 is visible from the front surface 11 a of the device case 11. Therefore, the first camera 190 can shoot a subject existing on the front side (display screen 121 side) of the electronic device 1. The first camera 190 is called an in camera. On the other hand, the lens 201 of the second camera 200 is visible from the back surface 11 b of the device case 11. Therefore, the second camera 200 can capture a subject existing on the back side of the electronic device 1. The second camera 200 is called an out camera.

  The acceleration sensor 150 can detect the acceleration of the electronic device 1. The acceleration sensor 150 is, for example, a three-axis acceleration sensor. The acceleration sensor 150 can detect the acceleration of the electronic device 1 in the X-axis direction, the Y-axis direction, and the Z-axis direction (see FIGS. 1 and 2).

  The battery 210 can output the power source of the electronic device 1. The battery 210 is, for example, a rechargeable battery. The power output from the battery 210 is supplied to various components such as the control unit 100 and the wireless communication unit 110 included in the electronic device 1.

  The electronic device 1 may not include the acceleration sensor 150. In this case, the electronic device 1 may be connected to an acceleration sensor separate from the electronic device 1 wirelessly or by wire.

  The electronic device 1 may include a sensor other than the acceleration sensor 150. For example, the electronic device 1 may include at least one of an atmospheric pressure sensor, a geomagnetic sensor, a temperature sensor, a proximity sensor, an illuminance sensor, and a gyro sensor. In addition, the electronic device 1 may be connected to a sensor other than the acceleration sensor 150 other than the acceleration sensor 150 in a wireless or wired manner.

<About image position control>
The control unit 100 performs image position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit 120 at a predetermined frame rate based on the movement of the electronic device 1. Is possible. In other words, the control unit 100 controls the display position of the image displayed on the display unit 120 at a predetermined frame rate based on the movement of the device case 11 of the electronic device 1, thereby positioning the image with respect to the earth. It is possible to perform image position control for controlling the. It can be said that the image display position is the position of the image in the display screen 121. The image displayed on the display unit 120 at a predetermined frame rate may be a moving image or a still image. The predetermined frame rate is, for example, 60 fps. The predetermined frame rate may be other than this.

  FIG. 5 is a diagram for explaining an outline of an example of image position control. FIG. 5 shows a state in which the electronic device 1 moves by a movement amount L in the + X axis direction from a certain frame period T1 to the next frame period T2. The frame period is a period during which one frame image is displayed. For example, if the frame rate is 60 fps, the length of the frame period is 1/60 second. The upper side of FIG. 5 shows the electronic device 1 in the frame period T1, and the lower side of FIG. 5 shows the electronic device 1 in the frame period T2. In the example of FIG. 5, for example, an image (still image) 400 including a character string 401 “ABC” is displayed on the display screen 121 of the electronic device 1. In FIG. 5, the center position 501 of the image 400 displayed in the frame period T1 and the center position 502 of the image 400 displayed in the frame period T2 are indicated by crosses. Since the display unit 120 performs hold-type display, it can be said that the image 400 displayed on the display unit 120 does not change in one frame period. That is, it can be said that the display position of the image 400 does not change in one frame period.

  In the example of FIG. 5, the size of the image 400 matches the size of the display screen 121. In the frame period T1, the image 400 is displayed on the display screen 121 so that the center position of the display screen 121 matches the center position 501 of the image 400.

  As shown in FIG. 5, when the electronic apparatus 1 moves by the movement amount L along the + X axis direction with respect to the earth from the frame period T1 to the next frame period T2, the image position control by the control unit 100 causes In the next frame period T2, the display position of the image 400 on the display screen 121 moves by the movement amount L along the −X axis direction from the display position in the frame period T1. Therefore, as shown in the lower side of FIG. 5, the center position 502 of the image 400 in the frame period T2 is equal to the movement amount L along the −X axis direction than the center position 501 of the image 400 in the frame period T1. It is off.

  As described above, by moving the display position of the image on the display screen 121 in the direction opposite to the moving direction of the electronic device 1 by the moving amount of the electronic device 1, the position of the image with respect to the earth can be made difficult to move. it can. In other words, the relative position of the image with respect to the space can be made difficult to move. Thereby, the visibility of the image displayed on the display unit 120 is improved.

  For example, when a user holding the electronic device 1 is present in a vehicle such as a bus, the user's hand may be shaken to move the position of the electronic device 1 with respect to the earth. In this example, even when a user who holds the electronic device 1 is present in the vehicle, the position (relative position) of the image displayed by the electronic device 1 is less likely to move. Therefore, the user can easily view the image displayed on the electronic device 1. Further, since the position of the target object (character string 401 in FIG. 5) included in the image displayed on the electronic device 1 with respect to the earth is difficult to move, the visibility of the target object is increased. improves.

  In this example, even if the user's hand holding the electronic device 1 shakes due to aging or illness, the position of the image displayed by the electronic device 1 with respect to the earth is difficult to move. Therefore, the user can easily view the image displayed on the electronic device 1.

  In addition, when the visibility of the image displayed on the electronic device 1 is poor, the user may feel unwell. However, according to the electronic device 1 of the present example, such a possibility may occur. Is reduced.

  As in this example, when the display screen 121 and the image 400 have the same size and the display position of the entire image 400 is moved by the image position control, as shown in the lower side of FIG. Further, only a part of the image 400 is displayed on the display screen 121, and an area 121 a where the image 400 is not displayed on the display screen 121 is generated. In this case, a predetermined image different from the image 400 may be displayed in the area 121a. For example, an image in which the color of each pixel is a predetermined color (for example, black) may be displayed in the region 121a. Further, the size of the image 400 may be smaller than the size of the display screen 121.

  Next, image position control will be described in detail. In this example, the control unit 100 determines whether to perform image position control based on at least one condition, as will be described later. Therefore, in this example, the image position control is not always executed, but only when the execution is determined.

  Hereinafter, the frame period of interest in the description of the electronic device 1 may be referred to as “target frame period”. An image to be displayed in the target frame period may be referred to as a “target image”. In addition, an image display position when image position control is not executed may be referred to as a “standard display position”. As the standard display position, for example, an image display position in which the center position of the display screen 121 matches the center position of the image, such as the display position of the image 400 in the upper electronic device 1 in FIG. Is done.

  FIG. 6 is a flowchart illustrating an example of the operation of the electronic device 1 when the electronic device 1 displays an image during the target frame period. The electronic device 1 executes the process shown in FIG. 6 for each frame period.

  As shown in FIG. 6, in step s1, the control unit 100 checks whether or not the execution flag stored in the storage unit 103 is on. Step s1 is executed by the CPU 101, for example. The execution flag is a flag indicating whether or not to perform image position control. Image position control is performed when the execution flag is on, and image position control is not performed when the execution flag is off. The setting of the execution flag will be described in detail later.

  In step s1, when confirming that the execution flag is off, the control unit 100 causes the display unit 120 to display the target image at the standard display position in step s2. In step s2, the CPU 101 controls the drive circuit 300 that drives the display panel 122, so that the target image is displayed at the standard display position.

  On the other hand, in step s1, when it is confirmed that the execution flag is on, the control unit 100 executes steps s3 and s4 to perform image position control. In step s3, the control unit 100 identifies the movement of the electronic device 1 based on the output signal of the acceleration sensor 150. Specifically, based on the output signal of acceleration sensor 150, control unit 100 specifies the movement amount and movement direction in the XY plane for electronic device 1 over a predetermined period. In other words, the control unit 100 specifies the movement amount and movement direction of the electronic device 1 on a plane parallel to the display screen 121 in a predetermined period based on the output signal of the acceleration sensor 150. This predetermined period may be referred to as an “observation period”. As the observation period, for example, a period from the start of a frame period immediately before the target frame period to a time slightly before the start of the target frame period is employed. Therefore, it can be said that the control unit 100 generally specifies the movement amount and movement direction of the electronic device 1 in the XY plane in the frame period immediately before the target frame period. Step s3 is executed by the CPU 101, for example.

  Here, the frequency when the user's hand trembles due to aging or illness is often 10 Hz or less. Moreover, the frequency of the vibration which the user who rides on a vehicle receives from the said vehicle has many 10H or less.

  Therefore, in this example, as the movement of the electronic device 1, for example, vibration of 10 Hz or less is assumed. Therefore, it can be considered that the moving direction of the electronic device 1 in one frame period (1/60 second) is substantially constant. Hereinafter, a frame period immediately before the target frame period may be referred to as a “previous frame period”. Further, the movement amount and movement direction specified in step s1 may be referred to as “observation movement amount” and “observation movement direction”, respectively.

  When step s3 is executed, in step s4, the control unit 100 causes the display unit 120 to display the target image at the display position based on the movement of the electronic device 1 specified in step s3. Specifically, the control unit 100 moves the display position of the target image on the display screen 121 in the direction opposite to the observation movement direction by the observation movement amount from the display position of the image displayed in the previous frame period. As described above, the target image is displayed on the display unit 120. Thereby, the position of the image displayed in the target frame period with respect to the earth is less likely to change from the previous frame period.

  In step s4, for example, the CPU 101, based on the image data indicating the target image, based on the observation movement amount and the observation movement direction, image data indicating a portion of the target image that is actually displayed on the display screen 121. Is generated. The drive circuit 300 drives the display panel 122 based on the image data generated by the CPU 101, so that the display position of the target image in the target frame period is greater than the display position of the image displayed in the previous frame period. The target image is displayed on the display screen 121 so as to move in the direction opposite to the observation movement direction by the observation movement amount.

  In step s4, for example, the CPU 101 may output the image data indicating the target image and the acquired observation movement amount and observation movement direction to the drive circuit 300. In this case, the drive circuit 300 causes the display position of the target image in the target frame period to move in the direction opposite to the observation movement direction by the observation movement amount from the display position of the image displayed in the previous frame period. The display panel 122 is driven based on the image data, the observation movement amount, and the observation movement direction received from the CPU 101.

  Note that when the movement of the electronic device 1 is only along the Z-axis direction, the observed movement amount at step s3 is zero. Therefore, in this case, the image display position in the target frame period does not change from the previous frame period.

  When the control unit 100 executes the processes in steps s1 to s4 as the target frame period, the position of the image displayed on the display screen 121 at a predetermined frame rate is less likely to move. . In this example, the position of the image with respect to the earth during execution of the image position control is less likely to change from the position of the image with respect to the earth when the image is displayed at the standard display position. As a result, the visibility of the image is improved. Hereinafter, when the image is displayed at the standard display position, the position of the image with respect to the earth may be referred to as “standard position of the image with respect to the earth”.

  FIG. 7 is a diagram illustrating an example of a state in which the position of the image with respect to the earth is controlled during the execution of the image position control. FIG. 7 shows an example in which the electronic apparatus 1 moves in the + X axis direction in a plurality of frame periods. In FIG. 7, the vertical axis indicates the position of the image with respect to the earth in the + X axis direction, and the horizontal axis indicates time. A graph 600 shows a temporal change in the position of the image with respect to the earth when the electronic device 1 that is performing image position control moves in the + X-axis direction in a plurality of frame periods. A graph 610 shows a temporal change in the position of the image with respect to the earth when the electronic device 1 that is not executing the image position control moves in the + X-axis direction in a plurality of frame periods.

  As shown in the graph 610, when the image position control is not executed, the position of the image displayed on the display unit 120 with respect to the earth always changes according to the movement of the electronic device 1 and greatly deviates from the standard position SP. It will be.

  On the other hand, during the execution of the image position control, as shown in the graph 600, the position of the image displayed on the display unit 120 with respect to the earth changes according to the movement of the electronic device 1 within one frame period. However, in the next frame period, the image coincides with the standard position SP of the image with respect to the earth. Therefore, the position of the image displayed on the display unit 120 with respect to the earth is unlikely to change from the standard position SP of the image with respect to the earth.

  Note that the control unit 100 may cause the display unit 120 to display the target image so that the display position of the target image slightly approaches the standard display position after step s4 described above. Thereby, it is possible to reduce the possibility that the display position of the target image is greatly separated from the standard display position.

<About decision processing>
In this example, the control unit 100 performs a determination process that determines whether to perform image position control based on at least one condition. The determination process is performed by the CPU 101, for example. If it is determined in the determination process that image position control is to be performed, the execution flag is set to ON. On the other hand, if it is determined in the determination process that image position control is not performed, the execution flag is set to OFF.

  In the determination process, the control unit 100 determines whether or not to perform image position control based on, for example, a first condition indicating whether or not the orientation of the display screen 121 is stable.

  When determining that the orientation of the display screen 121 is stable, the control unit 100 determines to perform image position control and turns on the execution flag. On the other hand, when determining that the orientation of the display screen 121 is not stable, the control unit 100 determines not to perform image position control and turns off the execution flag.

  Here, when the user is looking at the display screen 121, there is a high possibility that the orientation of the display screen 121 is stable. Even when a user holding the electronic device 1 is in the vehicle, the electronic device 1 may vibrate, but the orientation of the display screen 121 when the user is viewing the display screen 121 is stable. It is highly possible that

  As in this example, the control unit 100 determines whether or not to perform image position control based on the first condition whether or not the orientation of the display screen 121 is stable. It is possible to perform image position control when the possibility that the user is looking at the display screen 121 is high, and not to perform image position control when the possibility that the user is looking at the display screen 121 is low. Therefore, the electronic device 1 can perform image position control when necessity is high, and can not perform image position control when necessity is low. As a result, the effectiveness of the image position control is improved and the power consumption of the electronic device 1 is reduced.

  FIG. 8 is a flowchart illustrating an example of the determination process. The control unit 100 repeatedly executes the determination process shown in FIG.

  As shown in FIG. 8, in step s11, the control unit 100 performs a first determination based on the output signal of the acceleration sensor 150 to determine whether the orientation of the display screen is stable. In the first determination, the control unit 100 specifies the orientation of the display screen 121 a plurality of times during a predetermined period based on the output signal of the acceleration sensor 150. For example, the control unit 100 specifies the orientation of the display screen 121 every several frame periods during several tens of frame periods. Based on the output signal of the acceleration sensor 150, the control unit 100 identifies a direction perpendicular to the display screen 121 and going from the display screen 121 toward the outside of the electronic device 1, and the identified direction is displayed on the display screen 121. And the direction. Next, the control unit 100 obtains the average of the orientations of the display screen 121 specified a plurality of times, and sets this as the reference direction. Next, the control unit 100 obtains an angle between each of the orientations of the display screen 121 specified a plurality of times and the reference direction. And the control part 100 determines with the direction of the display screen 121 being stable, when all the calculated | required some angles are below a threshold value. As a result, the result of the first determination is YES. On the other hand, the control unit 100 determines that the orientation of the display screen 121 is not stable when at least one of the obtained plurality of angles is larger than the threshold value. As a result, the result of the first determination is NO. The threshold value is set to 10 to 20 degrees, for example.

  Note that the control unit 100 may specify the orientation of the display screen 121 based on the output signal of the geomagnetic sensor that detects the geomagnetism around the electronic device 1. Further, the control unit 100 may specify the orientation of the display screen 121 based on the output signal of the gyro sensor that detects the angular velocity of the electronic device 1. The control unit 100 may specify the orientation of the display screen 121 based on at least two output signals of the acceleration sensor 150, the geomagnetic sensor, and the gyro sensor.

  If it is determined in step s11 that the orientation of the display screen 121 is stable (YES), in step s12, the control unit 100 determines to perform image position control. In step s13, the control unit 100 sets the execution flag to ON.

  On the other hand, if it is determined in step s11 that the orientation of the display screen 121 is not stable (NO), in step s14, the control unit 100 determines not to perform image position control. In step s15, the control unit 100 sets the execution flag to OFF.

  In the determination process, a plurality of conditions may be used. That is, the control unit 100 may determine whether to perform image position control based on a plurality of conditions in the determination process.

  For example, in the determination process, a first condition and a second condition indicating whether or not the electronic device 1 is moving may be used. FIG. 9 is a flowchart showing an example of the determination process in this case. In the determination process shown in FIG. 9, first, in step s <b> 21, the control unit 100 performs a second determination that determines whether or not the electronic device 1 is moving based on the output signal of the acceleration sensor 150. If it is determined in the second determination that the electronic device 1 is not moving, the above-described step s14 is executed. Thereafter, the control unit 100 operates in the same manner. On the other hand, when it is determined in the second determination that the electronic device 1 is moving, the above-described step s11 is executed. Thereafter, the control unit 100 operates in the same manner.

  In this way, the electronic device 1 is highly necessary because the control unit 100 determines whether or not to perform image position control based on the second condition whether or not the electronic device 1 is moving. Sometimes it is possible to perform image position control and not perform image position control when the need is low. Thereby, the effectiveness of the image position control is improved and the power consumption of the electronic device 1 is reduced.

  In the determination process, a first condition, a second condition, and a third condition whether or not the operation mode of the electronic device 1 is set to a control mode for performing image position control may be used. FIG. 10 is a flowchart showing an example of the determination process in this case.

  The operation modes of the electronic device 1 that performs the determination process shown in FIG. 10 include a control mode that performs image position control and a normal mode that does not perform image position control. For example, the user can set the operation mode of the electronic device 1 to the electronic device 1 by operating the display screen 121 of the electronic device 1. The electronic device 1 in the normal mode displays an image at the standard display position.

  In the determination process illustrated in FIG. 10, first, in step s31, the control unit 100 performs a third determination to determine whether or not the operation mode of the electronic device 1 is set to the control mode. In the third determination, when it is determined that the operation mode of the electronic device 1 is not set to the control mode, that is, when the operation mode of the electronic device 1 is the normal mode, the control unit 100 executes step s14 described above. To do. Thereafter, the control unit 100 operates in the same manner. On the other hand, in the third determination, when it is determined that the operation mode of the electronic device 1 is set to the control mode, the control unit 100 executes step s21 described above. Thereafter, the control unit 100 operates in the same manner as in FIG.

  As described above, the control unit 100 determines whether or not to perform image position control based on the third condition as to whether or not the operation mode of the electronic device 1 is set to the control mode. The possibility that the image position control is executed when it is not desired to execute the position control can be reduced. Therefore, the convenience of the electronic device 1 is improved and the power consumption of the electronic device 1 is reduced.

  Note that step s11 may not be executed in the determination process of FIG. In the determination process of FIG. 10, at least one of steps s11 and s21 may not be executed.

  As described above, the electronic device 1 determines whether or not to perform image position control based on at least one condition, thereby improving the effectiveness of the image position control and reducing the power consumption of the electronic device 1. Can be reduced.

<Various modifications>
Hereinafter, various modifications of the electronic apparatus 1 will be described.

<First Modification>
When the electronic device 1 is performing minute vibration, there is a high possibility that the afterimage of the image displayed on the display screen 121 is visible to the user. As a result, the user who views the display screen 121 may feel unwell. Further, when the image position control is performed when the afterimage of the image displayed on the display screen 121 is unlikely to be visible to the user, the user may feel uncomfortable.

  Therefore, in the determination process according to the present modification, a fourth condition is used as to whether or not minute vibrations continue in the electronic device 1 for a certain period of time.

  In the present modified example, in step s11 shown in FIGS. 8 to 10 described above, the control unit 100 performs the first determination and determines whether or not minute vibrations continue in the electronic device 1 for a predetermined time. 4. Make a decision.

  Based on the output signal of the acceleration sensor 150, the control unit 100 can determine whether or not minute vibrations have continued in the electronic device 1 for a certain period of time. In the fourth determination, the control unit 100 first determines each of the amplitude and period of vibration of the electronic device 1 in the X-axis direction or the Y-axis direction a plurality of times for a predetermined period based on the output signal of the acceleration sensor 150. Identify. Next, the control unit 100 determines whether or not each of the amplitudes specified a plurality of times is equal to or less than the first threshold value and whether or not each of the frequencies specified a plurality of times is equal to or less than the second threshold value. The first threshold value is set to several tens mm, for example, and the second threshold value is set to 1 Hz to several Hz, for example. When each of the amplitudes specified a plurality of times is equal to or less than the first threshold value and each of the frequencies specified a plurality of times is equal to or less than the second threshold value, the control unit 100 causes minute vibrations in the electronic device 1. It is determined that it has continued for a certain time. As a result, the result of the fourth determination is YES. On the other hand, when at least one of the amplitudes specified a plurality of times is greater than the first threshold value and when at least one of the frequencies specified a plurality of times is greater than the second threshold value, the control unit 100 4 The determination result is NO.

  If the control unit 100 determines YES in at least one of the first determination and the fourth determination in step s11, the control unit 100 executes step s12 and thereafter operates in the same manner. On the other hand, if the control unit 100 determines NO in both the first determination and the fourth determination in step s11, the control unit 100 executes step s14 and then operates in the same manner.

  The control unit 100 may execute step s12 when determining YES in both the first determination and the fourth determination, and execute step s14 when determining NO in at least one of the first determination and the fourth determination. . In step s11, the first determination may not be executed. In this case, if the fourth determination is YES, step s12 is executed, and if the fourth determination is NO, step s14 is executed.

  Thus, in this modification, it is determined whether image position control is performed based on the 4th condition whether the minute vibration is continuing for a fixed time in the electronic device 1. FIG. Thereby, the electronic device 1 can perform image position control when the necessity is high, and can not perform the image position control when the necessity is low. As a result, the effectiveness of the image position control is improved and the power consumption of the electronic device 1 is reduced. Further, since it is possible to reduce the possibility that the image position control is performed when the afterimage of the image displayed on the display screen 121 is low for the user to see, the user feels uncomfortable when viewing the display screen 121. The possibility can be reduced.

  Further, by determining whether or not image position control is performed based on a plurality of conditions including the fourth condition, the effectiveness of the image position control is further improved, and the power consumption of the electronic device 1 is further increased. Reduce.

<Second Modification>
When the user who possesses the electronic device 1 is on a vehicle, a similar vibration pattern may appear periodically in the vibration of the electronic device 1. In this case, there is a high possibility that the afterimage of the image displayed on the display screen 121 is visible to the user. As a result, the user who views the display screen 121 may feel unwell.

  Therefore, in the determination process according to the present modification, a fifth condition is used as to whether or not a similar vibration pattern appears periodically in the vibration of the electronic device 1.

  In the modification, in step s11 illustrated in FIGS. 8 to 10 described above, the control unit 100 performs the first determination and determines whether or not a similar vibration pattern appears periodically in the vibration of the electronic device 1. A fifth determination is made.

  The control unit 100 can determine whether or not a similar vibration pattern appears periodically in the vibration of the electronic device 1 based on the output signal of the acceleration sensor 150. In the fifth determination, first, the control unit 100 acquires a vibration waveform of the electronic device 1 in the X-axis direction or the Y-axis direction for a predetermined period based on the output signal of the acceleration sensor 150. Next, the control unit 100 determines whether or not a similar vibration pattern appears periodically in the acquired vibration waveform. When the control unit 100 determines that similar vibration patterns appear periodically in the acquired vibration waveform, the result of the fifth determination is YES. On the other hand, the control unit 100 sets the result of the fifth determination to NO when there is no similar vibration pattern that appears periodically in the acquired vibration waveform.

  If the control unit 100 determines YES in at least one of the first determination and the fifth determination in step s11, the control unit 100 executes step s12 and then operates in the same manner. On the other hand, if the control unit 100 determines NO in both the first determination and the fifth determination in step s11, the control unit 100 executes step s14 and then operates in the same manner.

  The control unit 100 may execute step s12 when determining YES in both the first determination and the fifth determination, and execute step s14 when determining NO in at least one of the first determination and the fifth determination. .

  As in the first modification, the first determination may not be executed in step s11. In Step s11, the first determination, the fourth determination, and the fifth determination may be performed. That is, the control unit 100 may determine whether to perform image position control based on the first condition, the fourth condition, and the fifth condition. In this case, when it is determined YES in at least one of the first determination, the fourth determination, and the fifth determination, the control unit 100 executes Step s12, and when it determines NO in all of these determinations, it executes Step s14. You can do it. The control unit 100 executes step s12 if it is determined YES in all of the first determination, the fourth determination, and the fifth determination, and executes step s14 if it is determined NO in at least one of these determinations. Good.

  Thus, in this modification, it is determined whether image position control is performed based on the 5th condition whether the vibration pattern similar in the vibration of the electronic device 1 appears periodically. Thereby, as in the first modification, the effectiveness of the image position control is improved, and the power consumption of the electronic device 1 is reduced. Further, it is possible to reduce the possibility that the user feels uncomfortable when viewing the display screen 121.

  Further, by determining whether or not the image position control is performed based on a plurality of conditions including the fifth condition, the effectiveness of the image position control is further improved, and the power consumption of the electronic device 1 is further increased. Reduce.

<Third Modification>
When the user who possesses the electronic device 1 is riding a vehicle such as a bicycle or a car, there is a high possibility that the afterimage of the image displayed on the display screen 121 is visible to the user. As a result, the user who views the display screen 121 may feel unwell.

  Therefore, in the determination process according to this modification, a sixth condition is used as to whether or not the user of the electronic device 1 is on the vehicle.

  In the present modification, in step s11 shown in FIGS. 8 to 10 described above, the control unit 100 performs the first determination and performs the sixth determination for determining whether or not the user of the electronic device 1 is on the vehicle. Do. In step s11, when the control unit 100 determines that the user is on the vehicle, the result of the sixth determination is YES. On the other hand, if the control unit 100 determines that the user is not on the vehicle, the result of the sixth determination is NO.

  If the control unit 100 determines YES in at least one of the first determination and the sixth determination in step s11, the control unit 100 executes step s12 and thereafter operates in the same manner. On the other hand, if the control unit 100 determines NO in both the first determination and the sixth determination in step s11, the control unit 100 executes step s14 and then operates in the same manner.

  The control unit 100 can determine whether or not the user of the electronic device 1 is on the vehicle based on the output signal of the acceleration sensor 150. Hereinafter, the sixth determination will be described in detail.

  In the present modification, the control unit 100 can specify the moving means of the user. For example, the control unit 100 determines whether the user is walking, moving, running, moving by bicycle, moving by car, moving by bus, train You can specify whether you are moving. That is, the control unit 100 determines whether the user's moving means is “walking”, “running”, “bicycle”, “automobile”, “bus”, “train” Can be specified. The user moving means that can be specified by the control unit 100 are not limited to this.

  Here, it is known that the acceleration of the electronic device 1 shows a unique temporal change pattern according to the moving means of the user having the electronic device 1. When the pattern of the time change of acceleration detected by the acceleration sensor 150 indicates a pattern corresponding to “walking”, the control unit 100 specifies that the user's moving means is “walking”. In addition, when the pattern of the time change of acceleration detected by the acceleration sensor 150 indicates a pattern corresponding to “running”, the control unit 100 specifies that the user's moving means is “running”. In addition, when the acceleration time change pattern detected by the acceleration sensor 150 indicates a pattern corresponding to “bicycle”, the control unit 100 specifies that the user's moving means is “bicycle”. The same applies to “automobile”, “bus”, and “train”.

  In the present modification, the control unit 100 can also determine whether the user is stopped based on the output signal of the acceleration sensor 150.

  In the sixth determination in step s11, the control unit 100 determines whether or not the user has stopped based on the output signal of the acceleration sensor 150. When determining that the user is stopped, the control unit 100 determines that the user is not on the vehicle. On the other hand, if the control unit 100 determines that the user has not stopped, the control unit 100 identifies the moving means of the user. The control unit 100 determines that the user is on the vehicle when the identified moving means is any one of “bicycle”, “automobile”, “bus”, and “train”. On the other hand, the control unit 100 determines that the user is not on the vehicle when the identified moving means is either “walking” or “running”.

  In this way, the control unit 100 can perform the sixth determination that determines whether or not the user is on the vehicle.

  The controller 100 may execute step s12 when determining YES in both the first determination and the sixth determination, and execute step s14 when determining NO in at least one of the first determination and the sixth determination. .

  Further, similarly to the first modified example and the like, the first determination may not be executed in step s11 of the modified example. In step s11, at least one of the first determination, the fourth determination, and the fifth determination, and the sixth determination may be executed. That is, the control unit 100 may determine whether to perform image position control based on at least one of the first condition, the fourth condition, the fifth condition, and the sixth condition.

  Thus, in this modification, it is determined whether image position control is performed based on the 6th condition whether the user of the electronic device 1 is on the vehicle. As a result, as in the first modification, the effectiveness of the image position control is improved, and the power consumption of the electronic device 1 is reduced. Further, it is possible to reduce the possibility that the user feels uncomfortable when viewing the display screen 121.

  Further, by determining whether or not the image position control is performed based on a plurality of conditions including the sixth condition, the effectiveness of the image position control is further improved, and the power consumption of the electronic device 1 is further increased. Reduce.

  When the user's moving means is “running”, the electronic device 1 is more likely to be vibrated than when the user is “walking”. That is, when the user moves faster than when walking, the electronic device 1 is likely to be vibrated. Therefore, it is effective that the image position control is executed when the user is moving fast.

  Therefore, the control unit 100 may use a seventh condition in the determination process, that is, whether or not the user is moving fast, instead of the sixth condition described above. In this case, in step s11, instead of the sixth determination, a seventh determination is performed to determine whether or not the user is moving fast. In the seventh determination, similarly to the sixth determination, the control unit 100 first determines whether or not the user has stopped. If the control unit 100 determines that the user is stopped, the result of the seventh determination is NO. On the other hand, if the control unit 100 determines that the user has not stopped, the control unit 100 identifies the moving means of the user. The control unit 100 determines that the user is moving fast when the specified moving means is any one of “running”, “bicycle”, “automobile”, “bus”, and “train”. As a result, the result of the seventh determination is YES. On the other hand, when the identified moving means is “walking”, the control unit 100 sets the result of the seventh determination to NO.

  Thus, the effectiveness of the image position control is improved by determining whether or not the image position control is performed based on the seventh condition whether or not the user of the electronic device 1 is moving fast. At the same time, the power consumption of the electronic device 1 is reduced. Further, it is possible to reduce the possibility that the user feels uncomfortable when viewing the display screen 121.

  Further, by determining whether or not image position control is performed based on a plurality of conditions including the seventh condition, the effectiveness of the image position control is further improved, and the power consumption of the electronic device 1 is further increased. To reduce.

<Fourth Modification>
The user may move the hand holding the electronic device 1 greatly. For example, when trying to lift the electronic device 1 on the desk or the floor, the user may move the hand holding the electronic device 1 greatly. In addition, the user may move the hand holding the electronic device 1 greatly in an attempt to show the display screen 121 of the electronic device 1 to another person. When the user moves the hand holding the electronic device 1 greatly, there is a high possibility that the user does not see the display screen 121. Therefore, it can be said that there is little need to perform image position control when the hand holding the electronic device 1 is moved greatly.

  On the other hand, when the user moves the hand holding the electronic device 1 greatly, the acceleration of the electronic device 1 is likely to increase.

  Therefore, in the determination process according to the present modification, an eighth condition is used as to whether or not a large acceleration is generated in the electronic device 1.

  In the present modification, in step s11 shown in FIGS. 8 to 10 described above, the control unit 100 performs the first determination and determines whether or not a large acceleration has occurred in the electronic device 1 in the eighth determination. I do.

  The control unit 100 can determine whether or not a large acceleration is generated in the electronic device 1 based on the output signal of the acceleration sensor 150. In the eighth determination, the control unit 100 first determines the acceleration of the electronic device 1 in the X-axis direction, the acceleration of the electronic device 1 in the Y-axis direction, and the Z-axis direction based on the output signal of the acceleration sensor 150. The combined acceleration obtained by combining the acceleration of the electronic device 1 is obtained. Then, the control unit 100 determines whether or not the magnitude of the combined acceleration is greater than or equal to a threshold value. When determining that the magnitude of the combined acceleration is equal to or greater than the threshold value, the control unit 100 determines that a large acceleration is generated in the electronic device 1. As a result, the result of the eighth determination is NO. On the other hand, when determining that the magnitude of the combined acceleration is smaller than the threshold value, the control unit 100 sets the result of the eighth determination to YES.

  If the control unit 100 determines YES in at least one of the first determination and the eighth determination in step s11, the control unit 100 executes step s12 and then operates in the same manner. On the other hand, if the control unit 100 determines NO in both the first determination and the eighth determination in step s11, the control unit 100 executes step s14 and then operates in the same manner.

  The control unit 100 may execute step s12 when determining YES in both the first determination and the eighth determination, and execute step s14 when determining NO in at least one of the first determination and the eighth determination.

  Further, similarly to the first modified example and the like, the first determination may not be executed in step s11 of the modified example. In step s11, at least one of the first determination, the fourth determination, the fifth determination, and the sixth determination, and the eighth determination may be executed. In step s11, at least one of the first determination, the fourth determination, the fifth determination, and the seventh determination, and the eighth determination may be executed.

  Thus, in this modification, it is determined whether or not the image position control is performed based on the eighth condition of whether or not a large acceleration is generated in the electronic device 1. Thereby, the effectiveness of the image position control is improved and the power consumption of the electronic device 1 is reduced.

  Further, by determining whether or not image position control is performed based on a plurality of conditions including the eighth condition, the effectiveness of the image position control is further improved, and the power consumption of the electronic device 1 is further increased. To reduce.

<Fifth Modification>
When using a plurality of conditions in the determination process, the control unit 100 determines whether to perform image position control based on the weights set for each of the plurality of conditions and the plurality of conditions. May be.

  For example, consider a case where the first condition, the fourth condition, the fifth condition, the sixth condition, and the eighth condition are used in the determination process. That is, consider the case where the first determination, the fourth determination, the fifth determination, the sixth determination, and the eighth determination are executed in step s11. In this case, for example, the weighting of the first condition regarding the orientation of the display screen 121 and the weighting of the eighth condition regarding the magnitude of acceleration are increased. Further, the weighting of the sixth condition relating to the moving means of the user is assumed to be medium. And the weighting of the 4th condition regarding the fine vibration of the electronic device 1 and the weighting of the 5th condition regarding the vibration pattern of the electronic device 1 are made small. As an example, the weighting of the first and eighth conditions is 50, the weighting of the sixth condition is 30, and the weighting of the fourth and fifth conditions is 10. The weighting value for each condition is not limited to this.

  In step s11, the control unit 100 weights the sum of the weights of the conditions corresponding to the determination in which the result is YES among the first determination, the fourth determination, the fifth determination, the sixth determination, and the eighth determination. Calculated as the total value. Then, when the weighted total value is equal to or larger than the threshold value, the control unit 100 determines to perform image position control by executing step s12. On the other hand, when the weighted total value is less than the threshold value, the control unit 100 executes step s14 and determines not to perform image position control. The threshold value is set to 70, for example. The threshold value is not limited to this.

  In step s11, for example, when YES is determined in the first determination and the sixth determination among the first determination, the fourth determination, the fifth determination, the sixth determination, and the eighth determination, the weighted total value becomes 80, and the threshold value. Value (70) or more. In this case, it is determined that image position control is performed.

  In step s11, for example, when YES is determined in the fourth determination and the sixth determination, the weighted total value is 40, which is less than the threshold value (70). In this case, it is determined that image position control is not performed.

  In step s11, for example, when YES is determined in the fifth determination and the eighth determination, the weighted total value is 60, which is less than the threshold value (70). In this case, it is determined that image position control is not performed.

  In step s11, for example, when YES is determined in the first determination and the eighth determination, the weighted total value is 100, which is equal to or greater than the threshold value (70). In this case, it is determined that image position control is performed.

  As described above, the control unit 100 determines whether or not to perform image position control based on the weights set for each of the plurality of conditions and the plurality of conditions in the determination process. The effectiveness of the control is further improved, and the power consumption of the electronic device 1 is further reduced.

<Other variations>
In the image position control described above, the control unit 100 controls the display position of the entire target image based on the movement of the electronic device 1, but the display position of only some of the target images is the electronic device 1. You may control based on movement of. Thereby, the position with respect to the earth about the said one part image becomes difficult to move. Therefore, the visibility of the partial image is improved. In the example of FIG. 5, for example, the control unit 100 may control the display position of only the image of the character string 401 in the target image 400 based on the movement of the electronic device 1. As a result, the position of the image of the character string 401 with respect to the earth is difficult to move, and the visibility of the image of the character string 401 is improved.

  In the above example, the control unit 100 specifies the movement of the electronic device 1 based on the output signal of the acceleration sensor 150. However, the movement of the electronic device 1 may be specified using another method. For example, the control unit 100 may specify the movement of the electronic device 1 based on an image captured by the second camera (out camera) 200. In this case, for example, the control unit 100 specifies the moving amount and moving direction of a predetermined image included in the image captured by the second camera 200 by performing image processing on the captured image. Then, the control unit 100 sets the identified movement amount and movement direction as the movement amount and movement direction of the electronic device 1. Further, the control unit 100 may specify the movement of the electronic device 1 based on an image captured by the first camera (in camera) 190.

  When the control unit 100 includes a main CPU 101m having a high processing capability and a sub CPU 101s having a low processing capability, the main CPU 101m controls the drive circuit 300 and the main CPU 101m accelerates as shown in FIG. An output signal of the sensor 150 may be received. In this case, the determination process may be executed by the main CPU 101m or the sub CPU 101s. In the image display control, the main CPU 101m executes steps s1 and s3 shown in FIG. In step s4 described above, the main CPU 101m selects a portion of the target image that is actually displayed on the display screen 121 based on the observation movement amount and the observation movement direction based on the image data indicating the target image. The image data shown is generated. Then, the drive circuit 300 drives the display panel 122 based on the image data generated by the main CPU 101m. In step s4, the main CPU 101m may output the image data indicating the target image and the acquired observation movement amount and observation movement direction to the drive circuit 300. Then, the drive circuit 300 may drive the display panel 122 based on the image data, the observation movement amount, and the observation movement direction received from the main CPU 101m. The circuit scale of the main CPU 101m with high processing capability is larger than the circuit scale of the sub CPU 101s with low processing capability.

  Also, as shown in FIG. 12, the sub CPU 101s may control the drive circuit 300, and the sub CPU 101s may receive the output signal of the acceleration sensor 150. In this case, the determination process may be executed by the main CPU 101m or the sub CPU 101s. In the image display control, the sub CPU 101s executes the above steps s1 and s3. In step s4 described above, the sub CPU 101s selects a portion of the target image that is actually displayed on the display screen 121 based on the observation movement amount and the observation movement direction based on the image data indicating the target image. The image data shown is generated. Then, the drive circuit 300 drives the display panel 122 based on the image data generated by the sub CPU 101s. In step s4, the sub CPU 101s may output the image data indicating the target image and the acquired observation movement amount and observation movement direction to the drive circuit 300. Then, the drive circuit 300 may drive the display panel 122 based on the image data, the observation movement amount, and the observation movement direction received from the sub CPU 101s. In step s4, the main CPU 101m may generate image data indicating the target image and output the image data to the drive circuit 300, and output the observation movement amount and the observation movement direction acquired by the sub CPU 101s to the drive circuit 300. Then, the drive circuit 300 may drive the display panel 122 based on the image data received from the main CPU 101m and the observation movement amount and observation movement direction received from the sub CPU 101s.

  Since the circuit scale of the sub CPU 101s is smaller than the circuit scale of the main CPU 101m, even when the sub CPU 101s and the main CPU 101m perform the same processing, the power consumption of the sub CPU 101s is smaller than the power consumption of the main CPU 101m. . Therefore, when the control unit 100 performs image position control and determination processing using the sub CPU 101s, the power consumption of the electronic device 1 is reduced compared to when image position control and determination processing is performed using the main CPU 101m. can do. In addition, when the control unit 100 performs image position control and determination processing using the sub CPU 101s, the image position is also detected when the main CPU 101m is executing processing or when the main CPU 101m is in the sleep state. Execution of control and decision processing becomes possible.

  In the above example, the electronic device 1 is a mobile phone such as a smartphone, but may be another type of electronic device. The electronic device 1 may be a tablet terminal, a personal computer, a wearable device, or the like, for example. The wearable device employed as the electronic device 1 may be a wristband type or wristwatch type that is worn on the arm, or a headband type or glasses type that is worn on the head. It may also be a type that is worn on the body, such as a clothing type.

  As mentioned above, although the electronic device 1 was demonstrated in detail, above-described description is an illustration in all the phases, Comprising: This indication is not limited to it. The various modifications described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of this disclosure.

1 Electronic device 100 Control unit (control device)
103a Control program 120 Display unit

Claims (7)

Electronic equipment,
A display unit;
A control unit that controls the position of the image relative to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device;
The electronic device determines whether or not to perform the position control based on at least one condition including a predetermined condition of whether or not the orientation of the display screen of the display unit is stable. The electronic device according to claim 1,
The said control part is an electronic device which determines whether the said position control is performed based on several conditions including the said predetermined condition. The electronic device according to claim 2,
The said control part is an electronic device which determines whether the said position control is performed based on the weight set to the said several conditions, and the said several conditions.   A vehicle comprising the electronic device according to any one of claims 1 to 3. A control device for controlling the electronic device provided in the electronic device including the display unit,
Based on the movement of the electronic device, by controlling the display position of the image displayed on the display unit, performing position control to control the position of the image with respect to the earth,
A control device that determines whether or not to perform the position control based on at least one condition including a predetermined condition of whether or not the orientation of the display screen of the display unit is stable. A control program for controlling an electronic device including a display unit,
In the electronic device,
(A) performing a position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device;
(B) Control for executing the step of determining whether or not to perform the position control based on at least one condition including a predetermined condition of whether or not the orientation of the display screen of the display unit is stable program. An operation method of an electronic device including a display unit,
(A) performing a position control for controlling the position of the image with respect to the earth by controlling the display position of the image displayed on the display unit based on the movement of the electronic device;
(B) a step of determining whether or not to perform the position control based on at least one condition including a predetermined condition of whether or not the orientation of the display screen of the display unit is stable. How it works.

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