JP2018189918A - Driving device, control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device, a control method, and a program that can reduce a malfunction.SOLUTION: A driving device drives an electronic display medium, and comprises: a control part that controls the driving device; a self-generation part that generates power; a power accumulation part that accumulates the power generated by the self-generation part and supplies the power to the driving device; a reset part that, when the voltage of the power accumulated by the power accumulation part increases to a predetermined value, releases the reset of the control part and causes the control part to start operation; and a driving part that drives the electronic display medium according to instructions from the control part.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a drive device, a control method, and a program.

  Conventionally, a technique related to an electronic display medium such as a display panel using an electrophoretic display element has been proposed (for example, see Patent Document 1). In the technique disclosed in Patent Document 1, power is supplied to a microcomputer and a driver IC by a power source generated in a non-contact manner by electromagnetic induction.

Japanese Patent No. 5935536

  The supply of electric power by self-power generation such as electromagnetic induction and environmental power generation often becomes unstable. For this reason, there is a possibility that the drive device that drives the electronic display medium by the power generated by self-power generation malfunctions.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a drive device, a control method, and a program capable of suppressing malfunction even when power supply is unstable. is there.

  In order to solve the above-described problem, an aspect of the present invention is a drive device that drives an electronic display medium, and includes a control unit that controls the drive device, a self-power generation unit that generates electric power, and the self-power generation unit. The power storage unit that stores the power generated by the power supply and supplies power to the driving device, and when the voltage of the power stored by the power storage unit rises to a predetermined value, the reset of the control unit is released to operate And a drive unit that drives the electronic display medium according to an instruction from the control unit.

  One embodiment of the present invention further includes a discharge unit that discharges the electric power stored in the power storage unit in accordance with an instruction from the control unit after the driving of the electronic display medium by the drive unit is completed.

  According to another aspect of the present invention, the driving unit drives the electronic display medium by outputting a binary driving signal for a predetermined period, so that a binary voltage is alternately applied in the predetermined period. A binary drive signal is output.

  One aspect of the present invention that solves the above-described problems is a control unit that controls a drive device, a self-power generation unit that generates power, and accumulates the power generated by the self-power generation unit to supply power to the drive device. A drive unit that drives an electronic display medium, comprising: a power storage unit that performs resetting of the control unit; and a drive unit that drives the electronic display medium, wherein the reset unit includes: The step of releasing the reset of the control unit and starting the operation when the voltage of the electric power stored by the power storage unit rises to a predetermined value; and the control unit sends the drive unit to the electronic display medium. Instructing the driving of.

  One embodiment of the present invention that solves the above-described problems is a control unit that controls a drive device, a self-power generation unit that generates power, and the power generated by the self-power generation unit is accumulated to supply power to the drive device. A power storage unit to be supplied; a reset unit that releases a reset of the control unit and starts an operation when a voltage of power accumulated by the power storage unit rises to a predetermined value; and a drive unit that drives an electronic display medium A controller for driving the electronic display medium, wherein the controller controls the drive unit to drive the electronic display medium, and a discharge unit that discharges the electric power stored in the power storage unit. A program for executing the step of instructing and the step of instructing the discharging unit to discharge electric power after the control unit finishes driving the electronic display medium by the driving unit.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where supply of electric power is unstable, a malfunctioning can be suppressed and the drive device, control method, and program which can improve usability can be provided.

It is a figure which shows schematic structure of the drive device by this embodiment. It is sectional drawing for demonstrating the operation principle of electronic paper. It is a figure which shows the waveform of the drive signal which driver IC outputs. It is a figure which shows the example of a switch to a new image. It is a flowchart which shows an example of a drive process. It is a figure which shows the timing chart after electric power generation is performed until electric power is discharged.

  Hereinafter, a driving apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram illustrating a schematic configuration of a driving apparatus 100 according to the present embodiment.
In FIG. 1, the driving device 100 drives an electronic paper 200. A pixel of the electronic paper 200 can express two colors of white and black. The drive device 100 includes a switch 10, a power generation unit 20, a capacitor 30, a control unit 40, a nonvolatile memory 50, a driver IC 60, a reset circuit 70, a discharge circuit 80, and a GND 90.
In FIG. 1, a solid line arrow excluding an arrow from the switch 10 to the power generation unit 20 indicates an analog (power supply) system output, and a broken line arrow indicates a digital system output.

  The switch 10 is an operation unit that performs an operation that triggers rewriting of an image displayed on the electronic paper 200. In this embodiment, as an example, it is assumed that one switch is used, and an image displayed on the electronic paper 200 is switched every time the switch is pressed. Specifically, the images displayed on the electronic paper 200 are numbers 1 to 5.

  When the image displayed on the electronic paper 200 is 1 to 4 and the switch 10 is operated once, the images are switched to 2 to 5, respectively. When the switch 10 is operated once in the case of the image 5, the image is switched to 1. Such a combination of the driving device 100 and the electronic paper 200 can be used as a device for displaying the current adjustment stage in an electronic device capable of performing adjustment in five stages, for example.

  The operation of the switch 10 is notified to the control unit 40 as indicated by the broken arrow. The power generation unit 20 generates power by operating the switch 10. The power generation unit 20 generates a voltage by, for example, electromagnetic induction or a piezoelectric element by the movement of the switch 10. That is, electric power can be generated using kinetic energy when the switch 10 is operated. The generated power is output to the capacitor 30. The capacitor 30 accumulates the generated power and supplies it to the driving device 100. The accumulated power is supplied to the reset circuit 70, the control unit 40, the nonvolatile memory 50, and the driver IC 60, as indicated by the solid line arrow. Further, the accumulated power is discharged by the discharge circuit 80 after the driver IC is stopped.

The control unit 40 includes a CPU (Central Processing Unit) (not shown) and a storage device, and executes processing according to a program stored in the storage device. The control unit 40 is activated by the power supplied from the capacitor 30. When the control unit 40 rewrites an image displayed on the electronic paper 200 with a new image, the control unit 40 first displays image information (hereinafter, “current image information”) indicating an image currently displayed on the electronic paper 200 from the nonvolatile memory 50. Is also input to the driver IC 60. Further, the control unit 40 inputs image information indicating a new image (hereinafter also referred to as “new image information”) to the driver IC 60. The new image information is determined according to the number of times the switch 10 is pressed.
Further, the control unit 40 stores the new image information in the nonvolatile memory 50. The control unit 40 instructs the driver IC 60 to output a drive signal after the storage of new image information in the nonvolatile memory 50 is completed. Thereby, when the image displayed on the electronic paper 200 is rewritten, the new image information stored in the nonvolatile memory 50 becomes the current image information.
The nonvolatile memory 50 is, for example, a flash memory or FRAM (registered trademark: ferroelectric memory). The nonvolatile memory 50 stores the above-described image information and the like.

  The driver IC 60 includes a controller function and a booster circuit, and outputs a predetermined drive waveform to the electronic paper 200. In this embodiment, the power supply voltage around 2V is boosted to + 15V, and a binary DC voltage of 0V and + 15V is applied to the electronic paper 200 for driving. The driver IC 60 has a buffer (not shown) for storing the above-described current image information and new image information. The buffer includes an old image buffer that stores current image information and a new image buffer that stores new image information. The driver IC 60 compares the current image information stored in the buffer with the new image information by the controller function. Based on the comparison here, the driver IC 60 determines, for each pixel, whether (1) changes from white to black, (2) changes from black to white, (3) does not change as white, or (4) black. It is determined whether it remains unchanged, and a drive signal corresponding to the determination result is output for a predetermined period (for example, 500 ms).

As described above, the discharge circuit 80 discharges the electric power stored in the capacitor 30 to the GND 90. Usually, it is configured as a transistor circuit and can control discharge and non-discharge, but the configuration of the discharge circuit 80 is not limited to the above. The control unit 40 instructs the discharge circuit 80 to discharge power after the driver IC 60 finishes driving the electronic paper 200.
The reset circuit 70 operates the control unit 40 when the voltage of the power stored in the capacitor 30 is equal to or higher than a predetermined value. Specifically, the control unit 40 is in a reset state in the initial state and is not operating. The reset circuit 70 outputs a reset release signal to the CPU of the control unit 40, thereby releasing the reset of the control unit 40 and starting the operation.
Details of the timing for discharging the discharge circuit 80 will be described later.

FIG. 2 is a cross-sectional view for explaining the operation principle of the electronic paper 200. FIG. 2 shows an upper electrode 210, a lower electrode 220, microcapsules 230, white particles 240, black particles 250, and a transparent solvent 260 such as oil.
As shown in FIG. 2, the electronic paper 200 contains white particles 240 that are negatively and permanently charged and black particles 250 that are positively and permanently charged in a transparent solvent 260 of a microcapsule 230 having a diameter of about 40 μm. . The upper electrode 210 is a transparent electrode. The lower electrode 220 is a pixel electrode provided for each segment formed of a metal foil or the like.

When a voltage of +15 V is applied to the upper electrode 210, negatively charged white particles move upward, and positively charged black particles move downward, so that they appear white when viewed from the viewing side (in the direction of arrow A). . When a voltage of +15 V is applied to the lower electrode 220, the negatively charged white particles move downward, and the positively charged black particles move upward, so that they appear black when viewed from the viewing side.
Thereafter, even when the applied voltage is set to 0 V, the electronic paper 200 maintains the state and continues to display the same color due to the intermolecular force between the particles and between the particle and the microcapsule interface.

  FIG. 3 is a diagram illustrating a waveform of a drive signal output from the driver IC 60. FIG. 3A is a diagram illustrating waveforms of drive signals applied to the upper electrode 210 and the lower electrode 220. In FIG. 3A, “TP” indicates the waveform of the drive signal to the upper electrode. “BB” indicates a waveform of a drive signal to a segment in which the currently displayed color is black and a new image is displayed in black. “BW” indicates a waveform of a drive signal to a segment that is currently displayed in black and displayed in white in a new image. “WB” indicates a waveform of a drive signal to a segment in which the currently displayed color is white and black is displayed in a new image. “WW” indicates a waveform of a drive signal to a segment in which the currently displayed color is white and a new image is displayed in white.

  In this way, the driver IC 60 outputs a binary drive signal so that a binary voltage (0 V and +15 V) is alternately applied in a predetermined period. In the present embodiment, the number of times the binary value is switched is 60 times or more per second. That is, the period during which one voltage is continuously applied is about 16.7 milliseconds or less. Thereby, the flicker which arises at the time of the switching of an image can be suppressed.

Since a positive voltage is applied from the driver IC 60 to the upper electrode 210 and the lower electrode 220, the voltage applied to each segment is the drive signal indicated by “TP” and “BB”, “BW”, “WB”. , “WW”.
FIG. 3B is a diagram illustrating a waveform of the synthesized drive signal. The waveform of the drive signal shown in FIG. 3B is a waveform when the upper electrode 210 is GND. As a result, as shown in “BB” and “WW”, a voltage of 0 V is applied to the segment having no color change after synthesis.

On the other hand, as shown in “BW”, voltages of 0 V and −15 V are alternately applied to the segment changing from black to white. Since a negative voltage is applied to the lower electrode 220, the negatively charged white particles move upward, and the positively charged black particles move downward, so that they appear white when viewed from the viewing side.
As shown in “WB”, voltages of 0 V and 15 V are alternately applied to the segment changing from white to black. Since a positive voltage is applied to the lower electrode 220, the negatively charged white particles move downward, and the positively charged black particles move upward, so that they appear black when viewed from the viewing side.

  In the present embodiment, as shown in the drive waveform of FIG. 3, a voltage is applied so as to maintain DC balance for a predetermined period. This is because if the DC balance is not maintained, the life of the electronic paper is reduced or the electronic paper is burned.

  Conventionally, driving is performed in 2 to 6 stages. In the case of driving in two stages, the driving time is divided into two stages of the first half and the second half. For example, the upper electrode 210 is continuously applied with a voltage of 15 V in the first half, and the second half is driven by 0 V. It was broken. Further, for example, in the case of “BW”, driving was performed by continuously applying a voltage of −15 V in the first half and setting it to 0 V in the second half. As a result, there is a problem that flickering occurs when switching screens. Therefore, as in this embodiment, flickering at the time of screen switching can be suppressed by outputting a binary driving signal so that binary voltages are alternately applied in a predetermined period. By setting the time for one stage to 16.7 ms or less, it is possible to suitably suppress the flicker at the time of screen switching.

FIG. 4 is a diagram illustrating an example of switching to a new image. This switching example is an example of switching from the state where the 7-segment type image “2” is displayed to the new image “5” when the segment type electronic paper indicating numbers and icons is used as the electronic paper 200. Show. As described above, in the present embodiment, when the switch 10 is operated once, the switch is switched from “2” to “3”, but here it is switched from “2” to “5” for easy understanding. An example is used.
When switching from “2” to “5”, the areas 330 and 340 do not change. Since the region 330 is white to white, the drive signal having the waveform “WW” described above is applied. Since the region 340 is from black to black, a drive signal having a waveform of “BB” is applied.

On the other hand, the areas 310 and 320 change. Since the area 310 changes from black to white, a drive signal having a waveform of “BW” is applied. Since the region 310 changes from white to black, a drive signal having a waveform of “WB” is applied.
When the above-described drive signal is applied to each region for a predetermined period, the region 310 gradually changes from black to white and becomes white, and the region 320 gradually changes from white to black and becomes black. Switches to “5”.

  FIG. 5 is a flowchart illustrating an example of a driving process performed by the driving device 100. When the switch 10 is operated, the power generation unit 20 generates power and supplies power (step S101). When the voltage of the electric power exceeds a voltage (for example, 1.7 V) that can be stably driven by the control unit 40, the reset circuit 70 is activated and outputs a reset release signal to the control unit 40 (step S102). . Simultaneously with the activation of the reset circuit 70, the control unit 40 is activated (step S103), and the driver IC 60 is activated (step S104). When the driver IC 60 is activated, initial values of various registers such as an operation clock, drive waveform data, and a power-off mode of the booster circuit are input as initial settings.

  The controller 40 acquires current image information from the nonvolatile memory 50 (step S105). The control unit 40 inputs the acquired current image information to the new image buffer of the driver IC 60 (step S106). The driver IC 60 stores the current image information input to the new image buffer in the old image buffer (step S107). In the case of a driver IC that does not have a shift command for storing data in the new image buffer in the old image buffer, dummy driving is performed. In the case of dummy driving, no driving signal is actually output.

The control unit 40 inputs new image information acquired in response to the switch 10 being pressed into the new image buffer of the driver IC 60 (step S108). When new image information is input to the new image buffer, the current image information that has been stored in the new image buffer is overwritten on the new image information. The control unit 40 stores the new image information in the nonvolatile memory 50 (step S109). When the control unit 40 instructs the driver IC 60 to output a drive signal, a drive signal corresponding to the current image information and the new image information is output (step S110). The drive signal is determined by comparing the current image information stored in the old image buffer and the new image information stored in the new image buffer. When the drive signal is output, the control unit 40 copies the new image information stored in the new image buffer to the old image buffer (step S111). The control unit 40 checks whether or not BUSY indicating that the drive signal is being output is output from the driver IC 60 (step S112).
The control unit 40 determines whether or not the BUSY output from the driver IC 60 has ended (step S113). If the BUSY output from the driver IC 60 has not ended (step S113: NO), it is checked again whether the BUSY is output from the driver IC 60 in step S112. When the BUSY output from the driver IC 60 is completed (step S113: YES), the driver IC 60 stops (step S114), and the control unit 40 instructs the discharge circuit 80 to discharge power (step S115). Exit. Thereafter, as described with reference to FIG. 6, the control unit 40 is caused to end the operation by the reset circuit 70.

As shown in the processing described above, the control unit 40 starts the operation when the reset circuit 70 outputs a reset release signal triggered by the voltage of the supplied power becoming 1.7 V, In the process of instructing the discharge in step S115, the process of the control unit 40 ends.
In the case of power generation by self-power generation, the voltage rise may become unstable immediately after the start of power supply from the power generation unit 20, and the operation of the CPU of the control unit 40 may become unstable or runaway. There is a fear. In view of this, the reset circuit 70 is provided so that the reset release signal is output after the voltage supplied from the capacitor 30 exceeds a predetermined value necessary for stable operation, thereby stabilizing the control unit 40. Thus, the operation can be surely started. Further, once the processing is completed, the control unit 40 does not perform the next processing until the reset state is reached. Thereby, even when the voltage supplied from the capacitor 30 is unstable after rewriting is completed, erroneous display can be suitably suppressed. In addition, after the rewriting of the electronic paper 200 is completed by providing the discharge circuit 80, the voltage of the power supplied from the capacitor 30 is quickly reduced to a predetermined value or less, so that the control unit 40 can be reset in a short time. Can be in a state. Thereby, even when the switch 10 is pressed again after the rewriting is completed, the rewriting process can be started quickly. This will be described in detail with reference to FIG.

FIG. 6 is a diagram illustrating a timing chart from when power generation by the power generation unit 20 is performed to when the electric power stored in the capacitor 30 is discharged. The “power generation unit” illustrated in FIG. 6 indicates the voltage of the power generated by the power generation unit 20 and accumulated in the capacitor 30. The “reset circuit” indicates the voltage of power supplied from the reset circuit 70 to the control unit 40. “Control unit” indicates whether or not the control unit 40 is operating. “Driver IC” indicates whether or not the driver IC 60 is operating. “Discharge circuit” indicates whether or not the discharge circuit 80 is operating.
Note that the voltage 1.7V shown in FIG. 6 is an example of a voltage at which the control unit 40 and the driver IC 60 can operate normally. 3.5 V is an example of a voltage that can be generated by the power generation unit 20. Therefore, the voltages 1.7V and 3.5V are values determined by the device configuration such as the control unit 40, the driver IC 60, and the power generation unit 20.

First, when the switch 10 is operated at time T1, the power generation unit 20 starts power generation. The electric power generated by the power generation unit 20 is accumulated in the capacitor 30, and the reset circuit 70 outputs a reset release signal to the control unit 40 at time T2 when the accumulated voltage becomes 1.7V, whereby the control unit 40 starts and starts operation.
Next, at time T <b> 3 when the voltage becomes 3.5 V, the control unit 40 instructs the driver IC 60 to drive the electronic paper 200. As a result, the driver IC 60 starts driving the electronic paper 200. Along with this, a current of several tens of microamperes to several hundred microamperes flows, so that the voltage of the power generation section gradually decreases. The driver IC 60 drives the electronic paper 200 until time T4, whereby a new image is displayed on the electronic paper 200. In the present embodiment, when the voltage reaches 3.5 V, the control unit 40 instructs the driver IC 60 to drive, but this is designed to provide a sufficient margin for stable operation. The voltage at the time of giving the instruction may be 3.5 V or less as long as it is higher than the voltage necessary for the driver IC 60 to drive. Actually, instead of measuring the voltage and instructing driving, an appropriate waiting time may be set so that the voltage becomes 3.5 V, and the time T3 may be determined.

  At time T5, the control unit 40 instructs the discharge circuit 80 to discharge power. The discharge circuit 80 discharges power from time T5 to time T6. Due to this discharge, the voltage drops rapidly. When the voltage drops to 1.7 V, the reset circuit 70 stops outputting the reset release signal to the control unit 40. Thereby, the control part 40 stops operation | movement. At the same time, since the discharge of the discharge circuit 80 is also stopped, the voltage of the power generation unit after time T6 gradually decreases rather than suddenly.

In the case of a drive device that does not include the discharge circuit 80, the control unit 40 performs the initialization operation even if the switch 10 is operated again until the CPU of the control unit 40 naturally decreases to a voltage at which it stops. Cannot be performed, and it takes a very long time for the next operation to become effective, which reduces usability.
Thus, as in the present embodiment, by discharging electric power by the discharge circuit 80, the time can be greatly shortened until the next operation becomes effective, so that the usability can be improved. As a configuration of the discharge circuit 80, it is conceivable to discharge to GND by performing on / off control using a transistor, but is not limited to this configuration.

  As described above, the driving device according to the present embodiment is a driving device (for example, the driving device 100) that drives an electronic display medium (for example, the electronic paper 200), and a control unit (for example, the driving device 100). For example, the control unit 40), a self-power generation unit that generates power (for example, the power generation unit 20), and a power storage unit that stores power generated by the self-power generation unit and supplies power to the drive device (for example, Capacitor 30) and a reset unit (for example, reset) that releases the control unit and starts operation when the voltage of the electric power accumulated by the power storage unit rises to a predetermined value (for example, 1.7V) Circuit 70) and a drive unit (for example, driver IC 60) for driving the electronic display medium in accordance with an instruction from the control unit.

  According to this configuration, malfunction of the drive device can be more reliably suppressed.

  In addition, the drive device according to the present embodiment uses the electric power stored in the power storage unit according to an instruction from the control unit (for example, step S115) after the driving of the electronic display medium by the drive unit is completed. It has a discharge part (for example, discharge circuit 60) which discharges.

  According to this configuration, the malfunction of the drive device can be suppressed, the waiting time until the next rewriting of the electronic display medium can be shortened, and the usability can be improved.

  Further, the drive device according to the present embodiment releases the reset of the control unit and starts the operation when the voltage of the electric power accumulated by the power storage unit rises to a predetermined value (for example, 1.7 V). A reset unit (for example, reset circuit 70) is included.

  In the driving apparatus according to the present embodiment, the driving unit drives the electronic display medium by outputting a binary driving signal (for example, 0 V and +15 V) for a predetermined period (for example, 500 ms), and the predetermined period , A binary drive signal is output so that a binary voltage is applied alternately (for example, a drive waveform shown in FIG. 3).

  According to this configuration, it is possible to suppress flicker that occurs when switching images.

  In the above-described embodiment, binary driving is used as an example, but ternary driving may be used. In this case, the upper electrode 210 may be GND, and −15V, 0V, and 15V may be applied to the lower electrode 220. The driving voltage is not limited to -15V or + 15V, but may be other voltages depending on the driver IC or electronic display medium used. However, it is more preferable to use a driver IC for binary driving because the driving current of the driver IC can be made smaller than that of the driver IC for ternary driving.

  In the above-described embodiment, the segment type microcapsule electronic paper is used as the electronic display medium. However, any display medium having a memory property that can hold a display image even when power is not supplied can be used. For example, microcup type electronic paper or twist ball type electronic paper may be used, or dot matrix type electronic paper may be used.

  However, by using segment-type electronic paper, the circuit configuration and the driving method are simplified, and less power is required for rewriting, so that a display device with low power consumption can be realized. In particular, when power is obtained by self-power generation as in the present invention, it is not always possible to obtain large power. Therefore, a display device with low power consumption can be used to stably rewrite the display even with small power. It is possible, and erroneous display can be suitably suppressed, which is more preferable.

  Also, the display color of electronic paper is not limited to white and black. For example, white and red, white and blue, white and green, white and black and red, white and black and yellow, and three colors are also conceivable.

  Further, in the above-described embodiment, the case where the operation unit is one switch has been described. However, a plurality of switches may be provided to display which switch has been pressed how many times.

  In addition, the drive device is further provided with a communication device, and not only the display device is driven by the power generated by self-power generation, but also the communication device is driven and information according to the display state of the electronic display medium is received from the reception device. You may transmit to another apparatus with which it is equipped.

  Note that some or all of the functions described above may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each function described above may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

10 switch 20 power generation unit 30 capacitor 40 control unit 50 nonvolatile memory 60 driver IC
70 Reset Circuit 80 Discharge Circuit 100 Drive Device 200 Electronic Paper

Claims (5)

A driving device for driving an electronic display medium,
A control unit for controlling the driving device;
A self-power generation unit that generates electric power;
A power storage unit that accumulates electric power generated by the self-power generation unit and supplies electric power to the driving device;
A reset unit for releasing the reset of the control unit and starting the operation when the voltage of the electric power stored by the power storage unit rises to a predetermined value;
A drive unit for driving the electronic display medium according to an instruction from the control unit;
A driving device having:   The drive device according to claim 1, further comprising: a discharge unit that discharges the electric power stored in the power storage unit according to an instruction from the control unit after the drive of the electronic display medium by the drive unit is completed.   The driving unit drives the electronic display medium by outputting a binary driving signal for a predetermined period, and outputs the binary driving signal so that a binary voltage is alternately applied in the predetermined period. The drive device according to 1 or 2. A control unit that controls the drive device, a self-power generation unit that generates power, a power storage unit that accumulates the power generated by the self-power generation unit and supplies the power to the drive device, and cancels the reset of the control unit A control method for a drive device for driving an electronic display medium, comprising: a reset unit; and a drive unit for driving the electronic display medium.
The reset unit canceling the reset of the control unit and starting the operation when the voltage of the electric power accumulated by the power storage unit rises to a predetermined value;
The control unit instructing the driving unit to drive the electronic display medium;
A control method. A control unit that controls the drive device, a self-power generation unit that generates power, a power storage unit that stores the power generated by the self-power generation unit and supplies the power to the drive device, and the power storage unit When the voltage of electric power rises to a predetermined value, the reset unit that releases the reset of the control unit and starts operation, the drive unit that drives the electronic display medium, and the electric power stored in the power storage unit are discharged. A computer of a drive device for driving an electronic display medium, comprising: a discharge unit;
The control unit instructing the driving unit to drive the electronic display medium;
Instructing the discharging unit to discharge electric power after the control unit has finished driving the electronic display medium by the driving unit;
A program for running

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