JP6596821B2 - Electronic device, control method and program - Google Patents

Description

  The present invention relates to an electronic device, a control method, and a program that perform operation control using characteristics of a solar cell.

Conventionally, as a means for improving the outdoor visibility of a display device, there is a method of detecting ambient light with a sensor such as an illuminance sensor and controlling the illuminance of an LCD (Liquid Crystal Display) according to the environment. For example, in the technique described in Patent Document 1, gamma correction is performed so that the pixel value is smaller as the illuminance measured by the illuminance sensor is brighter. Control to reduce the brightness of the backlight.
In the technique described in Patent Document 2, brightness is detected from a short-circuit current of a solar cell, and brightness of a liquid crystal display screen is controlled.

JP 2010-122400 A Japanese Patent Laid-Open No. 09-037196

However, in the technique described in Patent Document 1 described above, hardware such as an illuminance sensor is indispensable for detecting ambient light.
Further, the technique described in Patent Document 2 has a problem in detection accuracy in a realistic illuminance region.

  The present invention has been made in view of such a situation, and an object of the present invention is to accurately recognize environmental light and control an electronic device without using hardware for detecting ambient light.

In order to achieve the above object, one aspect of the electronic device of the present invention is:
Detection means for detecting the characteristics of the open circuit voltage and the characteristics of the short circuit current, which are characteristics of the solar cell;
Based on the detection result by the detection means, the operation control based on the characteristics of the short-circuit current detected by the detection means is performed, or the operation control based on the characteristics of the open circuit voltage detected by the detection means is performed. A decision means to decide what to do;
Operation control means for performing the operation control determined by the determination means;
Equipped with a,
The determining means determines to perform operation control based on the characteristics of the open-circuit voltage when the short-circuit current detected by the detecting means is less than a predetermined value, and the short-circuit current detected by the detecting means If the value is equal to or greater than the predetermined value, the operation control based on the characteristics of the short-circuit current is performed .
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, it can recognize environmental light accurately and can control an electronic device, without using the hardware for environmental light detection.

It is a block diagram which shows the structure of the hardware of the portable terminal which concerns on one Embodiment of this invention. It is a circuit block diagram explaining the detection circuit of the open circuit voltage and short circuit current in a detection part. It is a schematic diagram for demonstrating the operation control using the characteristic (characteristic of an open circuit voltage) of a solar cell. It is a schematic diagram for demonstrating the operation control using the characteristic (short-circuit current characteristic) of a solar cell. It is a functional block diagram which shows the functional structure for performing an operation control process among the functional structures of the portable terminal of FIG. It is the schematic diagram which showed the example of the open circuit voltage characteristic setting table and the short circuit current characteristic setting table. It is a flowchart explaining the flow of the operation control process which the portable terminal of FIG. 1 which has the functional structure of FIG. 5 performs.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a hardware configuration of a mobile terminal according to an embodiment of the present invention.
The mobile terminal 1 is configured as a smartphone, for example.

  The mobile terminal 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input / output interface 15, an imaging unit 18, and an input unit 19. An output unit 20, a storage unit 21, a communication unit 22, and a drive 23.

  The CPU 11 executes various processes according to a program recorded in the ROM 12 or a program loaded from the storage unit 21 to the RAM 13.

The RAM 13, CPU 11 is data necessary are also appropriately stored in the time of executing various processes.

The CPU 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output interface 15 is also connected to the bus 14. A solar panel module 16, a detection unit 17, an imaging unit 18, an input unit 19, an output unit 20, a storage unit 21, a communication unit 22, and a drive 23 are connected to the input / output interface 15.

  Although not shown, the solar panel module 16 includes a solar cell, a module, an array, and the like. The solar panel module 16 generates power by receiving light from ambient light and supplies power to, for example, a battery pack (not shown). Moreover, from the solar panel module 16, it is comprised so that an open circuit voltage and a short circuit current can be detected.

  The detection unit 17 is configured to be able to detect an open circuit voltage and a short circuit current from the solar panel module 16.

FIG. 2 is a circuit configuration diagram illustrating an open circuit voltage and short circuit current detection circuit in the detection unit 17.
As shown in FIG. 2, the detection circuit of the detection unit 17 includes a short-circuit current detection circuit 101 and an open-circuit voltage detection circuit 102 . The short-circuit current detection circuit 101 and the open-circuit voltage detection circuit 102 are connected to the solar panel module 16 and the CPU 11, respectively, and are switched by switches (SW1 and SW2), so that signals from the short-circuit current detection circuit 101 are received. The short circuit current value is detected, and the open voltage value is detected by a signal from the open voltage detection circuit 102 .

  Although not shown, the imaging unit 18 includes an optical lens unit and an image sensor.

The optical lens unit is configured by a lens that collects light, for example, a focus lens or a zoom lens, in order to photograph a subject.
The focus lens is a lens that forms a subject image on the light receiving surface of the image sensor. The zoom lens is a lens that freely changes the focal length within a certain range.
The optical lens unit is also provided with a peripheral circuit for adjusting setting parameters such as focus, exposure, and white balance as necessary.

The image sensor includes a photoelectric conversion element, AFE (Analog Front End), and the like.
The photoelectric conversion element is composed of, for example, a CMOS (Complementary Metal Oxide Semiconductor) type photoelectric conversion element or the like. A subject image is incident on the photoelectric conversion element from the optical lens unit. Therefore, the photoelectric conversion element photoelectrically converts (captures) the subject image, accumulates the image signal for a predetermined time, and sequentially supplies the accumulated image signal as an analog signal to the AFE.
The AFE performs various signal processing such as A / D (Analog / Digital) conversion processing on the analog image signal. Through various signal processing, a digital signal is generated and output as an output signal of the imaging unit 18.
Such an output signal of the imaging unit 18 is hereinafter referred to as “captured image data”. Data of the captured image is appropriately supplied to the CPU 11 or an image processing unit (not shown).

The input unit 19 is configured with various buttons and the like, and inputs various types of information according to user instruction operations.
The output unit 20 includes a display, a speaker, and the like, and outputs an image and sound.
The storage unit 21 is configured with a hard disk, a DRAM (Dynamic Random Access Memory), or the like, and stores various image data.
The communication unit 22 controls communication with other devices (not shown) via a network including the Internet.

  A removable medium 31 made of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately attached to the drive 23. The program read from the removable medium 31 by the drive 23 is installed in the storage unit 21 as necessary. The removable media 31 can also store various data such as image data stored in the storage unit 21 in the same manner as the storage unit 21.

  In the mobile terminal 1 configured as described above, the operation control of the mobile terminal 1 according to the ambient light is performed using the characteristics of the solar cell in the solar panel module 16 constituting the solar cell without mounting the illuminance sensor ( The present embodiment has a function capable of performing display output control of the output unit 20. Specifically, in the mobile terminal 1, the illuminance is converted from the value of the short-circuit current or the open voltage from the solar panel module 16, and the operation control of the mobile terminal 1 corresponding to the converted illuminance (in this embodiment, Display output control of the output unit 20).

Here, the operation control using the characteristics of the solar cell will be described.
3 and 4 are schematic views for explaining the operation control using the characteristics of the solar cell.
In the present embodiment, the characteristics of the solar cell are derived from the characteristics of the open circuit voltage and the short circuit current.

As shown in FIGS. 3A and 3B , the characteristics of the open-circuit voltage do not show linear characteristics, and have a large slope in an environment where the illuminance is lower than 3000 [Lx]. In addition, when the illuminance is low, the rated value cannot be obtained. Also, as the characteristics of the open circuit voltage, when the illuminance becomes 4000 Lx or more, saturation starts, a configuration such as a comparator is possible, and since current detection is not performed, a circuit such as an amplifier is unnecessary and power consumption can be reduced. There are characteristics such as.

On the other hand, as shown in FIGS. 4 (a) and 4 (b), the characteristics of the short-circuit current increase in proportion to the current obtained in proportion to the light intensity, and are almost linear (the short-circuit current is the illuminance). The linear characteristic). In addition, as a characteristic of the short-circuit current, there is a characteristic such that the power of the amplifier is increased because a minute voltage difference is detected, and there is a loss in resistance.

  That is, when the surrounding environment is very dark and low illuminance, the short-circuit current is very small and the accuracy is poor. Therefore, there is a characteristic that it is easy to sample in the environment.

In the portable terminal 1 of the present embodiment, using such characteristics, a low illuminance environment of 3000 [Lx] or less is an area handled by an open circuit voltage, and operation control is performed based on the value of the open circuit voltage. Under an environment with an illuminance higher than 3000 [Lx], this is a region handled by a short-circuit current, and operation control is performed based on the value of the short-circuit current.
In the mobile terminal 1 of the present embodiment, the reason for using the open voltage without using only the short-circuit current is that the open voltage is more practical in the practical usage range (up to 1000 Lx) in the electronic device such as the mobile terminal 1. However, control with open circuit voltage is less power loss due to lower power loss in amplifier and resistor than control with short-circuit current. This is because there is a merit of being small.

FIG. 5 is a functional block diagram showing a functional configuration for executing the operation control process among the functional configurations of the portable terminal 1.
The operation control process refers to a series of processes for determining the current illuminance based on the detection value from the detection unit 17 and changing various parameters related to the display output in accordance with the illuminance to control the display output operation. .

  When the operation control process is executed, as shown in FIG. 5, in the CPU 11, the circuit control unit 51, the detection value acquisition unit 52, the illuminance determination unit 53, the control value acquisition unit 54, and the operation control unit 55. And it works.

  A table storage unit 71 is set in one area of the storage unit 21.

The table storage unit 71 stores data of an open circuit voltage characteristic setting table and a short circuit current characteristic setting table.
The open-circuit voltage characteristic setting table is a table in which the illuminance / open-circuit voltage value is associated with the control value based on the illuminance / open-circuit current characteristic. In the present embodiment, the illuminance / open voltage value, the LCD, and the control value of OLED (Organic Light Emitting Diode Display) are associated with each other.
The short circuit current characteristic setting table is a table in which the illuminance / short circuit current value is associated with the control value based on the illuminance / short circuit current characteristic. In the present embodiment, the illuminance / short-circuit current value, the LCD, and the control value of the output unit 20 that is an OLED (Organic Light Emitting Diode Display) are associated with each other.
Each table includes a driving voltage (brightness varies depending on the driving voltage value) for an OLED, a γ parameter, adjustment data for a current driving width, a backlight control, a γ parameter, and the like for an LCD.

Here, specific examples of the open-circuit voltage characteristic setting table and the short-circuit current characteristic setting table will be described.
FIG. 6 is a schematic diagram illustrating an example of an open circuit voltage characteristic setting table and a short circuit current characteristic setting table.
Specifically, as shown in FIG. 6A, the open-circuit voltage characteristic setting table includes illuminance [Lx] / open-circuit voltage [V], LED backlight luminance value (LED-BL [mA]), Γ value of LCD (R) (LCDγ (R)), γ value of LCD (G) (LCDγ (G) ) , γ value of LCD (B) (LCDγ (B)), and drive for changing luminance of OLED The voltage value (OLED voltage [V]) is associated.
Specifically, as shown in FIG. 6B, the short-circuit current characteristic setting table includes the illuminance [Lx] / short-circuit current [mA] and the luminance value of the LED backlight (LED-BL [mA]), Γ value of LCD (R) (LCDγ (R)), γ value of LCD (G) (LCDγ (G) ) , γ value of LCD (B) (LCDγ (B)), and drive for changing luminance of OLED The voltage value (OLED voltage [V]) is associated.

Returning to FIG. 5, the circuit control unit 51 controls switching between the short-circuit current detection circuit and the open-circuit voltage detection circuit in the detection unit 17. Specifically, ON / OFF control of switches in the short-circuit current detection circuit and the open-circuit voltage detection circuit is performed.
A value in each circuit can be detected by switching control between the short-circuit current detection circuit and the open-circuit voltage detection circuit by the circuit control unit 51.

  In the switching control by the circuit control unit 51, first, switching control is performed so that the detection value from the short-circuit current detection circuit can be acquired, and the illuminance calculated from the detection value from the short-circuit current detection circuit is less than a predetermined value (this embodiment) Is less than 3000 [Lx]), the switching control is performed so that the detection value from the open-circuit voltage detection circuit can be acquired. Then, after performing the operation control, the switching control is performed again so that the detection value from the short-circuit current detection circuit can be acquired.

  The detection value acquisition unit 52 acquires the detection value from the switched circuit by switching control between the short-circuit current detection circuit and the open-circuit voltage detection circuit by the circuit control unit 51.

The illuminance determination unit 53 refers to the short circuit current characteristic setting table stored in the table storage unit 71, and acquires the illuminance in the detection value of the short circuit current acquired from the short circuit current detection circuit.
And the illumination intensity determination part 53 determines whether the illumination intensity calculated | required from the detected value from a short circuit current detection circuit was less than predetermined value (in this embodiment, less than 3000 [Lx]). The table to be referred to (open-circuit voltage characteristic setting table or short-circuit current characteristic setting table) changes depending on the determination result by the illuminance determination unit 53.

The control value acquisition unit 54 refers to the open-circuit voltage characteristic setting table or the short-circuit current characteristic setting table in the table storage unit 71 based on the determination result by the illuminance determination unit 53 and controls from the detection value acquired by the detection value acquisition unit 52. Get the value.
Specifically, when the determination result by the illuminance determination unit 53 is less than 3000 [Lx], the control value acquisition unit 54 refers to the open-circuit voltage characteristic setting table based on the acquired open-circuit voltage value, If it is above 3000 [Lx], the control value is acquired by referring to the short-circuit current characteristic setting table based on the acquired short-circuit current value.

  The operation control unit 55 performs operation control of the mobile terminal 1 based on the control value acquired by the control value acquisition unit 54. Specifically, the operation control unit 55 changes the settings (backlight brightness and image quality parameters) of the output unit 20 with the control value acquired by the control value acquisition unit 54, and performs display output operation control. .

FIG. 7 is a flowchart for explaining the flow of operation control processing executed by the mobile terminal 1 of FIG. 1 having the functional configuration of FIG. In the following, an example in which an LED is configured as the output unit 20 will be described.
The operation control process is started by an operation for starting the operation control process on the input unit 19 by the user.

  In step S11, the circuit control unit 51 switches and controls the short-circuit current detection circuit and the open-circuit voltage detection circuit so that the detection value can be acquired from the short-circuit current detection circuit of the detection unit 17. Specifically, the circuit control unit 51 performs switching control so that the switch of the short-circuit current detection circuit is turned on and the switch of the open-circuit voltage detection circuit is turned off.

  In step S12, the detection value acquisition unit 52 acquires a detection value from the circuit. Since the detection value acquisition unit 52 is controlled to be switched so that the detection value can be acquired from the short circuit current detection circuit, the detection value acquisition unit 52 acquires the short circuit current value as the detection value.

  In step S13, the illuminance determination unit 53 acquires the illuminance from the detected value. That is, the illuminance determination unit 53 refers to the short-circuit current characteristic setting table in FIG.

In step S14, the illuminance determination unit 53 determines whether or not the acquired illuminance is less than 3000 [Lx].
If the illuminance is not less than 3000 [Lx], NO is determined in step S14, and the process proceeds to step S18. The processing after step S18 will be described later.
If the illuminance is less than 3000 [Lx], YES is determined in step S14, and the process proceeds to step S15.

  In step S15, the circuit control unit 51 switches and controls the short-circuit current detection circuit and the open-circuit voltage detection circuit so that the detection value can be acquired from the open-circuit voltage detection circuit of the detection unit 17. Specifically, the circuit control unit 51 performs switching control so that the switch of the short-circuit current detection circuit is turned off and the switch of the open-circuit voltage detection circuit is turned on.

  In step S <b> 16, the detection value acquisition unit 52 acquires a detection value from the circuit. Since the detection value acquisition unit 52 is controlled so as to be able to acquire the detection value from the open-circuit voltage detection circuit, the detection value acquisition unit 52 acquires the open-circuit voltage value as the detection value.

In step S17, since the control value acquisition unit 54 is less than 3000 [Lx], the control value corresponding to the open-circuit voltage value is acquired with reference to the open-circuit voltage characteristic setting table of FIG. The control value acquisition unit 54 acquires a backlight luminance value and RGB γ values as control values.
For example, referring to the open-circuit voltage characteristic setting table of FIG. 6A, when the detection value of the open-circuit voltage is 6.21 [V], the control value acquisition unit 54 returns a back-up of 5 [mA]. Obtain the brightness value of the light (LED-BL), the R value of R2 (LCDγ (R)), the G value of G2 (LCDγ (G)), and the B value of B2 (LCDγ (B)). To do.
Thereafter, the process proceeds to step S19.

In step S18, since the control value acquisition unit 54 is not less than 3000 [Lx], the control value corresponding to the short-circuit current value is acquired with reference to the short-circuit current characteristic setting table of FIG. The control value acquisition unit 54 acquires a backlight luminance value and RGB γ values as control values.
For example, referring to the short-circuit current characteristic setting table of FIG. 6B, when the short-circuit current value is 18.92 [mA], the control value acquisition unit 54 displays the backlight (15 mA) ( LED-BL) brightness value, R4 R (LCDγ (R)) γ value, G4 G (LCDγ (G)) γ value, B4 B (LCDγ (B)) γ value are acquired.

  In step S <b> 19, the operation control unit 55 performs display output operation control by changing the setting of the luminance of the backlight of the output unit 20 based on the control value acquired by the control value acquisition unit 54.

In step S <b> 20, the operation control unit 55 changes the image quality parameter setting of the output unit 20 based on the control value acquired by the control value acquisition unit 54, and performs display output operation control.
Thereafter, the process returns to step S11, and the illuminance is acquired again and various settings of the output unit 20 are performed according to the acquired illuminance.

  Therefore, in the portable terminal 1, by using an open-circuit voltage characteristic setting table at low illuminance and using a short-circuit current characteristic setting table above a predetermined illuminance, it is possible to detect from low illuminance to solar radiation environment in total and with high accuracy. Even if it is not mounted, operation control corresponding to the illuminance at the same level as the illuminance sensor can be performed.

The mobile terminal 1 that operates with the power of the solar battery configured as described above includes the solar panel module 16, the detection unit 17, and the operation control unit 55.
The detection part 17 detects the characteristic of the open circuit voltage which is the characteristic of the solar cell in the solar panel module 16 as illuminance information.
The operation control unit 55 controls the operation of the mobile terminal 1 based on the characteristics of the open circuit voltage detected by the detection unit 17.
Thereby, in the portable terminal 1, environmental light can be recognized accurately and control of the portable terminal 1 can be performed, without using the hardware for ambient light detection.

The detection part 17 detects the characteristic of the short circuit current which is the characteristic of the said solar cell as illuminance information.
The operation controller 55 controls the operation of the electronic device based on the characteristics of the short circuit current detected by the detector 17.
Thereby, in the portable terminal 1, environmental light can be recognized accurately and control of the portable terminal 1 can be performed, without using the hardware for ambient light detection.

Operation control unit 55, the short-circuit current detected by the detection unit 17, controls the operation of the portable terminal 1 based on the characteristic properties or the open-circuit voltage of the short-circuit current.
Thereby, in the portable terminal 1, the portable terminal 1 corresponding to environmental light can be controlled more accurately.

The operation control unit 55 performs operation control based on the operation control parameter of the mobile terminal 1 according to the characteristics of the solar cell in the solar panel module 16 detected by the detection unit 17.
Thereby, in the portable terminal 1, the portable terminal 1 corresponding to environmental light can be controlled more accurately.

The operation control unit 55 includes a short circuit current characteristic setting table that is a first table storing operation control parameters of the mobile terminal 1 according to the value of the short circuit current, and an operation control parameter of the mobile terminal 1 according to the value of the open circuit voltage. Is controlled based on an open-circuit voltage characteristic setting table which is a second table in which is stored.
Thereby, in the portable terminal 1, the portable terminal 1 can be controlled more easily.

When the short-circuit current detected by the detection unit 17 is less than a predetermined value, the operation control unit 55 performs operation control based on the operation control parameter of the portable terminal 1 in the open-circuit voltage characteristic setting table that is the second table. When the short circuit current detected by the detection unit 17 is equal to or greater than a predetermined value, the operation control is performed based on the operation control parameter of the mobile terminal 1 in the short circuit current characteristic setting table which is the first table.
Thereby, in the portable terminal 1, environmental light can be recognized more accurately and can be controlled.

  In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

In the above-described embodiment, the display output operation control is performed by changing the brightness of the backlight and the image quality parameter. However, the control of various portable terminals 1 corresponding to the ambient light can be performed. Control of the output means, illumination control of the portable terminal 1 or external illumination device, exposure control of the imaging unit 18 of the portable terminal 1 or external device, or notification of the amount of ultraviolet rays converted from the irradiation amount of the portable terminal 1 or external device Control can be performed.
Specifically, for example, 1) as a control of the mobile device backlight keypad, if illuminance around detected is lower than a predetermined irradiation degree, it is possible to light the backlight, further, in lighting Can be configured to control the backlight luminance according to the ambient illuminance. The control at this time is opposite to the light and dark control from the display output control of the display.
Further, 2) exposure control at the time of camera shooting of the mobile device can be configured to control the exposure at the time of shooting from the detected illuminance and other shooting conditions.
3) As lighting control of room lighting, lighting control of room lighting equipment is performed in accordance with the illuminance in the room detected by the mobile device in a state where data communication is possible between the mobile device and the room lighting control device. It can be constituted as follows. When the room brightness is less than a predetermined illuminance, the illumination is turned on, and when the room brightness is a predetermined brightness (for example, the illuminance of the room illumination or more), the illumination is turned off.
4) As the ultraviolet ray detection and notification, the amount of harmful ultraviolet ray converted from illuminance is detected, and a warning can be made when the amount exceeds a predetermined value.
Specifically, the operation control unit 55 controls the display of the output unit 20 of the mobile terminal 1 or the output unit of the external device, the illumination control of the mobile terminal 1 or the external lighting device, and the imaging unit 18 of the mobile terminal 1 or the external device. It can be configured to perform exposure control or notification control of the amount of ultraviolet rays converted from the irradiation amount of the mobile terminal 1 or an external device.

In the above-described embodiment, the mobile terminal 1 to which the present invention is applied has been described using a smartphone as an example, but is not particularly limited thereto.
For example, the present invention can be applied to general electronic devices having an operation control processing function. Specifically, for example, the present invention is applicable to a notebook personal computer, a printer, a television receiver, a video camera, a portable navigation device, a mobile phone, a digital camera, a portable game machine, and the like.

The series of processes described above can be executed by hardware or can be executed by software.
In other words, the functional configuration of FIG. 5 is merely an example, and is not particularly limited. That is, it is sufficient that the mobile terminal 1 has a function capable of executing the above-described series of processes as a whole, and what functional block is used to realize this function is not particularly limited to the example of FIG.
In addition, one functional block may be constituted by hardware alone, software alone, or a combination thereof.

When a series of processing is executed by software, a program constituting the software is installed on a computer or the like from a network or a recording medium.
The computer may be a computer incorporated in dedicated hardware. The computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

  The recording medium including such a program is not only constituted by the removable medium 31 of FIG. 1 distributed separately from the apparatus main body in order to provide the program to the user, but also in a state of being incorporated in the apparatus main body in advance. It is comprised with the recording medium etc. which are provided in. The removable medium 31 is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disc is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disc), a Blu-ray (registered trademark) Disc (Blu-ray Disc), and the like. The magneto-optical disk is configured by an MD (Mini-Disk) or the like. In addition, the recording medium provided to the user in a state of being preinstalled in the apparatus main body includes, for example, the ROM 12 in FIG. 1 in which the program is recorded, the hard disk included in the storage unit 21 in FIG.

  In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in time series along the order, but is not necessarily performed in time series, either in parallel or individually. The process to be executed is also included.

  As mentioned above, although several embodiment of this invention was described, these embodiment is only an illustration and does not limit the technical scope of this invention. The present invention can take other various embodiments, and various modifications such as omission and replacement can be made without departing from the gist of the present invention. These embodiments and modifications thereof are included in the scope and gist of the invention described in this specification and the like, and are included in the invention described in the claims and the equivalents thereof.

The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[Appendix 1]
An electronic device that operates on the power of a solar cell,
Detecting means for detecting the characteristics of the open-circuit voltage, which is a characteristic of the solar cell, as illuminance information;
Operation control means for controlling the operation of the electronic device based on the characteristics of the open circuit voltage detected by the detection means;
An electronic device comprising:
[Appendix 2]
The detection means detects the characteristics of the short circuit current, which is a characteristic of the solar cell, as illuminance information,
The operation control means performs operation control of the electronic device based on the characteristics of the short-circuit current detected by the detection means.
The electronic device as set forth in Appendix 1, wherein
[Appendix 3]
The operation control means performs operation control of the electronic device based on the short-circuit current or the characteristics of the open-circuit voltage from the short-circuit current detected by the detection means.
The electronic device as set forth in Appendix 2, wherein
[Appendix 4]
The operation control means includes
Performing operation control based on operation control parameters of the electronic device according to characteristics of the short-circuit current and open-circuit voltage detected by the detection means;
The electronic device according to appendix 2 or 3, characterized by the above.
[Appendix 5]
The operation control means includes
Operation based on a first table storing operation control parameters of the electronic device according to the value of the short-circuit current and a second table storing operation control parameters of the electronic device according to the value of the open circuit voltage Do control,
The electronic device as set forth in Appendix 4, wherein
[Appendix 6]
The operation control means includes
When the short-circuit current detected by the detection means is less than a predetermined value, the operation control is performed based on the operation control parameter of the electronic device of the second table,
When the short-circuit current detected by the detection means is larger than a predetermined value, the operation control is performed based on the operation control parameter of the electronic device of the first table.
The electronic device as set forth in Appendix 5, wherein
[Appendix 7]
The operation control means includes
Display control of display means of the electronic device or external device, illumination control of the electronic device or external lighting device, exposure control of the imaging means of the electronic device or external device, or conversion from the irradiation amount of the electronic device or external device To control the amount of ultraviolet rays,
The electronic device according to any one of appendices 1 to 6, characterized in that:
[Appendix 8]
A control method that is executed by an electronic device that operates on power from a solar cell,
A detection step of detecting the characteristics of the open circuit voltage, which is a characteristic of the solar cell, as illuminance information;
Based on the characteristics of the open circuit voltage detected by the detection step, an operation control step for performing operation control of the electronic device,
The control method characterized by including.
[Appendix 9]
A computer that controls electronic devices that are powered by the power of solar cells
Detecting means for detecting the characteristics of the open-circuit voltage, which is a characteristic of the solar cell, as illuminance information;
Operation control means for controlling the operation of the electronic device based on the characteristics of the open circuit voltage detected by the detection means;
A program characterized by functioning as

  DESCRIPTION OF SYMBOLS 1 ... Portable terminal, 11 ... CPU, 12 ... ROM, 13 ... RAM, 14 ... Bus, 15 ... Input / output interface, 16 ... Solar panel module, 17. ..Detection unit, 18 ... imaging unit, 19 ... input unit, 20 ... output unit, 21 ... storage unit, 22 ... communication unit, 23 ... drive, 31 ... Removable media, 51... Circuit control unit, 52... Detection value acquisition unit, 53... Illuminance determination unit, 54. Memory

Claims (6)

Detection means for detecting the characteristics of the open circuit voltage and the characteristics of the short circuit current, which are characteristics of the solar cell;
Based on the detection result by the detection means, the operation control based on the characteristics of the short-circuit current detected by the detection means is performed, or the operation control based on the characteristics of the open circuit voltage detected by the detection means is performed. A decision means to decide what to do;
Operation control means for performing the operation control determined by the determination means;
Equipped with a,
The determining means determines to perform operation control based on the characteristics of the open-circuit voltage when the short-circuit current detected by the detecting means is less than a predetermined value, and the short-circuit current detected by the detecting means If the value is equal to or greater than the predetermined value, the operation control based on the characteristics of the short-circuit current is performed .
An electronic device characterized by that. The operation control means includes
Performing the operation control based on an operation control parameter corresponding to the characteristics of the short-circuit current or the open-circuit voltage detected by the detection means;
The electronic device according to claim 1 . The operation control means includes
Performing the operation control based on a first table storing the operation control parameter corresponding to the value of the short-circuit current, or a second table storing the operation control parameter corresponding to the value of the open circuit voltage;
The electronic device according to claim 2 . The operation control means includes
When the short-circuit current detected by the detection means is less than a predetermined value, the operation control is performed based on the operation control parameter of the second table,
If the short-circuit current detected by the detection means is greater than or equal to the predetermined value, the operation control is performed based on the operation control parameter of the first table.
The electronic device according to claim 3 . A detection step for detecting the characteristics of the open-circuit voltage, which is a characteristic of the solar cell, and the identification of the short-circuit current;
Based on the detection result detected by the detection step, operation control based on the characteristics of the short-circuit current detected by the detection step is performed, or based on the characteristics of the open circuit voltage detected by the detection step A determination step for determining whether to perform motion control; an operation control step for performing motion control determined by the determination step;
Only including,
In the determining step, when the short-circuit current detected in the detection step is less than a predetermined value, it is determined to perform operation control based on the characteristics of the open-circuit voltage, and the short-circuit current detected in the detection step A control method executed in an electronic device, wherein operation control based on characteristics of the short-circuit current is performed when is equal to or greater than the predetermined value . The computer that controls the electronics
Detection means for detecting the characteristics of the open circuit voltage and the characteristics of the short circuit current, which are characteristics of the solar cell,
Based on the detection result detected by the detection means, the operation control based on the characteristics of the short-circuit current detected by the detection means is performed, or based on the characteristics of the open circuit voltage detected by the detection means A decision means for deciding whether to perform motion control;
Function as operation control means for performing operation control determined by the determination means ;
The determining means determines to perform operation control based on the characteristics of the open-circuit voltage when the short-circuit current detected by the detecting means is less than a predetermined value, and the short-circuit current detected by the detecting means A program for performing operation control based on characteristics of the short-circuit current when is equal to or greater than the predetermined value .

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