JP5557356B2 - Terminal device and program - Google Patents

Description

  The present invention relates to a terminal device and a program including a display unit that performs a display operation using a charged body that moves according to an applied voltage.

  2. Description of the Related Art In recent years, display means (electrophoretic display device) that performs a display operation using an electrophoresis phenomenon is known. In this display means (electrophoretic display device), a large number of mediums (microcapsules) filled with colored charged particles (charged bodies) are arranged between a pair of opposed electrodes, and between the pair of electrodes. When a voltage is applied, each charged particle moves in a direction corresponding to the applied voltage, thereby displaying. For example, when white charged particles move to the front side of the display means, the portion is displayed in white.

  In this type of display means, charged particles may agglomerate over time or may be partially biased depending on display contents. When such agglomeration or bias occurs, the charged particles cannot be sufficiently moved even when a voltage is applied, which causes display unevenness and contrast reduction. Therefore, conventionally, a technique is known in which a refresh operation is performed by alternately applying stronger voltages (alternating voltages) having different directions in order to eliminate aggregation and bias of charged particles. For example, in Patent Document 1, the refresh operation is controlled in accordance with the elapsed time from the previous display, the elapsed time from the previous refresh operation, the number of times displayed from the previous refresh operation, and the ambient temperature.

JP 2007-187938

  However, since the refresh operation in the above-described prior art applies an alternating voltage to move charged particles, the user perceives the display as “flickering” during the refresh operation. For example, as a refresh operation of the display means for performing black and white two-color display, when a full black display is performed for 250 milliseconds and then a full white display is performed for 250 milliseconds, the full black display and the full white display are used. Had a problem that the entire display would flicker.

  An object of the present invention is to make it possible to control a refresh operation to a display means that performs a display operation using a charged body that moves in accordance with an applied voltage, according to a current use situation.

The terminal device according to the first aspect of the present invention provides:
It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Equipped with,
The detection means detects the current style as the usage status,
The refresh control means controls to perform the refresh operation when the style detected by the detection means is a predetermined style;
Characterized in that way the.
A terminal device according to the second aspect of the present invention provides:
It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the style has been changed as the current usage status,
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the style has been changed;
It is characterized by doing so.
A terminal device according to the third aspect of the present invention provides:
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the apparatus main body is installed on a predetermined installation base as a use situation,
The refresh control means controls the refresh operation to be performed when it is detected by the detection means that an apparatus main body is installed on an installation table.
It is characterized by doing so.
A terminal device according to the fourth aspect of the present invention provides:
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the battery is being charged as a usage status;
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the battery is being charged;
It is characterized by doing so.
A terminal device according to the fifth aspect of the present invention provides:
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects a function in operation as a use situation,
The refresh control unit controls the refresh operation to be performed when a function in operation detected by the detection unit is a predetermined function;
It is characterized by doing so.
A terminal device according to the sixth aspect of the present invention provides:
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that a predetermined function is activated by an operation of an operation unit provided on a side surface of a casing constituting the apparatus main body as a usage state,
The refresh control means controls to perform the refresh operation when it is detected by the detection means that a predetermined function is activated;
It is characterized by doing so.
A program according to the seventh aspect of the present invention is:
For a computer that controls a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body ,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
To achieve,
The detecting function detects the current style as the usage status,
The ability to control the detected style by function of the detected that control so as to perform the refresh operation for a given style.
A program according to the eighth aspect of the present invention is:
For a computer that controls a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized
The detecting function detects that the style has been changed as the current usage status,
The control function controls to perform the refresh operation when it is detected that a style has been changed by the detection function.
A program according to the ninth aspect of the present invention is:
For the computer that controls the terminal device,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized
The function to detect is to detect that the apparatus main body is installed on a predetermined installation base as a usage situation,
The function to be controlled is controlled so that the refresh operation is performed when it is detected by the function to be detected that the apparatus main body is installed on the installation base.
A program according to a tenth aspect of the present invention is:
For the computer that controls the terminal device,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized
The detecting function detects that the battery is being charged as a use situation,
The function to be controlled is controlled to perform the refresh operation when it is detected that charging is being performed by the function to be detected.
A program according to an eleventh aspect of the present invention is:
For the computer that controls the terminal device,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized,
The function to detect detects the function in operation as a use situation,
The function to be controlled is controlled so that the refresh operation is performed when the function in operation detected by the function to be detected is a predetermined function.
A program according to a twelfth aspect of the present invention is:
For the computer that controls the terminal device,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the start of the refresh operation, one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized
The function to detect is to detect that a predetermined function is activated by an operation of an operation unit provided on a side surface of a housing constituting the apparatus body as a use situation,
The function to be controlled is controlled to perform the refresh operation when it is detected that a predetermined function is activated by the function to be detected.

  According to the present invention, the refresh operation to the display means that performs the display operation using the charged body that moves according to the applied voltage can be appropriately controlled according to the current use state, and the display by the refresh operation can be controlled. It is possible to prevent “flicker” from being shown to the user as much as possible.

The block diagram which showed the communication network system which can use the mobile telephone applied as a terminal device. In the external view of the mobile phone 1, (A) shows a closed style in a state in which the operation unit housing 1A and the display unit housing 1 are folded and closed, and (B) shows an open style in a state in which the folding is opened. (C) is the figure which showed the view style of the state which turned the display part housing | casing 1B 180 degrees in the open style, and then folded and closed. FIG. 2 is a block diagram showing basic components of the mobile phone 1. The figure for demonstrating the condition memory | storage part M1. The figure for demonstrating the data storage part M2 for decoration. The flowchart which showed the whole operation | movement of the mobile telephone started execution with power activation. The flowchart which showed the operation | movement following FIG. 8 is a flowchart for explaining the refresh control process (step A24 in FIG. 7) in detail. The flowchart which showed the operation | movement following FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
This embodiment exemplifies a case where the present invention is applied to a mobile phone as a terminal device, and FIG. 1 is a block diagram showing a communication network system in which the mobile phone can be used.
The mobile phone 1 is provided with a voice call function (telephone function), an e-mail function, an Internet connection function (Web access function), a camera function, a TV function, and the like. From the nearest base station 2A and exchange 2B, a wireless communication network is provided. When connected to the (mobile communication network) 2, a call can be made with another mobile phone 1 via the wireless communication network 2.

  In addition, the mobile phone 1 can send and receive e-mails via a wireless communication network 2 and a mail server (not shown), and when connected to the Internet 3 via the wireless communication network 2, It can be accessed and viewed. On the other hand, the mobile phone 1 is connected to a power source (not shown) such as a household outlet via a charging cable (not shown), or installed on an installation base 6 (charging base) connected to the charging cable ( Connected), the built-in battery (secondary battery) is charged. Further, when the mobile phone 1 is directly connected to a PC (personal computer) 5 or the like via the communication cable 4 or is installed (connected) to an installation base 6 (charging base) connected to the communication cable 4, Data communication is performed with the PC 5. The installation table 6 is not limited to an installation table having a charging function and a communication function, and may be an installation table having one of a charging function and a communication function, or an installation table having neither function ( It may be a mere installation stand).

FIG. 2 is an external view of the mobile phone 1.
The mobile phone 1 is a two-axis hinge type telephone in which an operation unit casing 1A and a display unit casing 1B constituting the device main body (apparatus main body) are connected to each other via a hinge part 1C so as to be foldable and openable and rotatable. It is. The hinge portion 1C is provided with an opening / closing hinge shaft for folding and closing the operation portion housing 1A and the display portion housing 1B, and one housing is substantially orthogonal to the opening / closing hinge shaft. And a pivot hinge shaft for pivoting with respect to the other casing, and the operation section casing 1A and the display section casing 1B can be folded open / closed and rotated via the hinge section 1C. It is connected freely.

  Such a two-axis hinge type mobile phone 1 has a plurality of styles (closed style, closed style) depending on how the operation unit housing 1A and the display unit housing 1B are connected. 2A shows a closed style in a state in which the operation unit housing 1A and the display unit housing 1 are folded and closed. FIG. 2B shows an open style in which the operation unit casing 1A and the display unit casing 1B are folded in this closed style, and FIG. 2C shows a display unit in this open style. The view style is shown in a state in which the housing 1B is rotated (inverted) 180 ° and then folded and closed.

  Main operation keys MK such as numeric / character keys and cursor keys are provided on the inner surface of the operation unit housing 1A (the surface facing the display unit housing 1B in the closed style state). A plurality of side keys SK are provided on the side surface of the body 1A. The side keys SK have different functions depending on the current style. That is, the side key SK is used as a setting key for setting a manner mode for prohibiting the generation of a ring tone in the closed style, and is used as a key for a camera function capable of camera shooting in the open style. In the style, it is used as a key for a television function capable of receiving and viewing a television broadcast.

  The main screen MD is provided on the inner surface of the display unit housing 1B (the surface facing the operation unit housing 1A in the closed style state), and the sub screen SD is provided on the opposite back side. It has been. The main screen MD is a screen having a size corresponding to substantially the entire inner surface of the display unit housing 1B, and is mainly a screen for displaying information. That is, the main screen MD is configured to use high-definition liquid crystal or organic EL, and displays numerical information, character information, image information, and the like with high definition. Note that the main screen MD that is positioned inside in the closed style is positioned outside in the view style. Accordingly, the main screen MD is mainly used in the open style shown in FIG. 2B or the view style shown in FIG.

  The sub screen SD is a screen having a size corresponding to substantially the entire back surface of the display unit housing 1B, and is a screen for decoration display mainly displaying decoration data. This sub-screen SD is a microcapsule type electronic paper (an example of an electrophoretic display) using an electrophoretic phenomenon, and colored charged particles (charged bodies) are filled between a pair of opposed electrodes. A large number of media are arranged, and when a voltage is applied between the pair of electrodes, the charged particles in the medium move in a direction corresponding to the applied voltage and display is performed. .

  For this sub-screen SD, in order to eliminate the aggregation and bias of the charged particles, a strong pulse voltage (alternating voltage) having a reverse polarity and different orientation is alternately applied between the pair of electrodes. Thus, for example, a refresh operation for alternately switching between a full black display for 250 milliseconds and a full white display for 250 milliseconds is performed for a predetermined time (for example, 1 second). Note that the pulse interval of the alternating voltage described above is not limited to 250 milliseconds but is arbitrary, such as 300 milliseconds, and is not limited to the case where the refresh operation is performed for a predetermined time (1 second). It is arbitrary such as 2 seconds or 1/2 second.

  In this case, whether or not to perform the refresh operation is controlled according to the current usage status of the mobile phone 1. Here, the usage status is during a style change, a specific style, charging, installation on an installation stand, operation of a specific function, and the like. In other words, when the refresh operation is performed according to the current usage status, when the sub screen SD is in a hidden style, when the sub screen SD is not likely to be used, the user may not see the sub screen SD. This is the case when it is high. The execution time of the refresh operation described above is not a fixed value. For example, it is used for 2 seconds in a specific use situation (for example, during a style or charging), or 1 second or 1/2 second during a style change. You may make it change according to a condition.

FIG. 3 is a block diagram showing basic components of the mobile phone 1.
The central control unit 11 includes a central processing unit that controls the overall operation of the mobile phone 1 according to various programs in the ROM 12. The ROM 12 has a program area and a data area, and a program for realizing the present embodiment is stored in this program area in accordance with operation procedures shown in FIGS. The RAM 13 is an internal memory having a work area and includes a condition storage unit M1 and a decoration data storage unit M2, which will be described later, a refresh history storage unit M3, a display content storage unit M4, and the like. The refresh history storage unit M3 is a memory that sequentially stores, as refresh history information, the current date and time (refresh execution date and time) when the refresh operation is performed on the sub screen SD. The display content storage unit M4 is a memory for temporarily saving the display content displayed on the sub screen SD.

  The wireless communication transmitting / receiving unit 14 includes a wireless unit, a baseband unit, a demultiplexing unit, and the like. For example, when the call function, the e-mail function, the Internet connection function, and the data communication function are operated, the wireless communication transmitting / receiving unit 14 Data is transmitted and received. During operation of the call function, after receiving a signal from the receiving side of the baseband unit and demodulating it into a received baseband signal, the audio is output from the transmission speaker SP via the audio signal processing unit 15, In addition, input voice data from the receiving microphone MC is taken from the voice signal processing unit 15 and encoded into a transmission baseband signal, which is then given to the transmission side of the baseband unit and transmitted from the antenna.

  The display unit 16 has the main screen MD and the sub screen SD described above, and controls the display operation thereof. The refresh operation is performed by applying a predetermined alternating voltage to the sub screen SD. The operation unit 17 has a main operation key MK and a side key SK, and the central control unit 11 executes processing according to input signals such as dial input, character input, and command input. An RTC (real time clock module) 18 constitutes a clock unit, and the central control unit 11 acquires the current date and time from the RTC 18. The notification unit 19 includes a sound speaker 19A, an LED (light emitting diode) 19B, and a vibration motor 19C. The notification unit 19 is driven at the time of an incoming call to notify an incoming call, and is also driven at the time of alarm notification.

  The camera imaging unit 20 is capable of shooting moving images in addition to still image shooting. In addition to a shooting lens, a mirror / lens block such as a mirror, an image sensor, and a driving system thereof, a distance measuring sensor, a light amount sensor, an analog processing circuit A signal processing circuit, a compression / decompression circuit, and the like. The TV broadcast receiving unit 21 receives terrestrial digital TV broadcasts for portable receivers such as mobile phones, and is connected to a receiving unit (analog circuit unit) that is connected to a TV antenna and extracts a broadcast signal. A digital circuit unit that demodulates broadcast signals by OFDM (Orthogonal Frequency Division Multiplexing), separates and decodes multiplexed broadcast signals into video, audio, and data (character data), and decompresses compressed data. Have.

  When the mobile phone 1 is connected to a power source such as a household outlet via a charging cable or installed (connected) on the installation base 6 (charging base) connected to the charging cable, the charging detection unit 22 , It detects that the built-in battery (secondary battery) is being charged. The installation table detection unit 23 detects that the mobile phone 1 is installed on the installation table 6. The style detection unit 24 can detect each style that changes in accordance with the arrangement state of two housings (the display unit housing 1A and the operation unit housing 1B) constituting the apparatus main body. For example, a magnetic sensor, The central control unit 11 has a configuration including a micro switch, a mechanical switch, etc., and the central control unit 11 selects each style (closed style, open style, anti-open style, view style) of the apparatus body based on each detection signal from the style detection sensor 24. I try to distinguish.

FIG. 4 is a diagram for explaining the condition storage unit M1.
The condition storage unit M1 stores conditions for controlling whether or not to perform a refresh operation based on the current usage status, and the sub screen SD may be hidden or the sub screen SD may not be used. Each “item” is included as a condition for causing the refresh operation to be performed on the condition that it is high and the possibility that the sub screen SD is not viewed is high. “Item” has “Style change”, “Style”, “Charge”, “Installation stand”, “Function”, “Side key function”, and “Content” represents the content of “Item” corresponding to it. In the explanation, "Style change" indicates that the refresh operation is performed on the condition that the style is being changed, and "Style" indicates that the current style is a view style or an open style. Indicates that a refresh operation is performed.

  “Charge” indicates that when the charging detection unit 22 detects that charging is in progress, the refresh operation is performed on the condition that charging is being performed, and “installation table” indicates that the installation table detection unit 23 Indicates that the refresh operation is performed on the condition that the installation stage 6 is being installed when it is detected that the installation stage 6 is being installed. “Function” indicates that the refresh operation is performed on condition that the TV function is in operation and the camera function is in operation.

  The “side key function” indicates that the refresh operation is performed on the condition that the side key is used as a key for the camera function. The “setting flag” is a flag for designating a currently effective “item” among the above-mentioned “items”, and is arbitrarily set by a user operation. The flag “1” indicates a currently valid condition. In the illustrated example, “setting flag” of “item” corresponding to “style” is set to “1”, and “setting” of other “items” is set. This is a case where “0” is set in the “flag”, but “1” may be set in the “setting flag” in association with a plurality of “items”.

FIG. 5 is a diagram for explaining the decoration data storage unit M2.
The decoration data storage unit M2 stores, for example, a floral pattern, a geometric pattern, and the like as decoration data displayed on the sub-screen (electrophoretic display device) SD. ”,“ Actual data ”, and“ display flag ”. The “display flag” designates which decoration data is currently displayed on the sub-screen SD, and the flag “1” indicates the decoration data currently being displayed. In this embodiment, the case where the decoration data displayed on the sub screen SD is one is illustrated, but the sub screen SD is divided into a plurality of pieces so that different decoration data is displayed on each divided screen. It may be.

  Next, the operation concept of the mobile phone in this embodiment will be described with reference to the flowcharts shown in FIGS. Here, each function described in these flowcharts is stored in the form of a readable program code, and operations according to the program code are sequentially executed. In addition, the operation according to the above-described program code transmitted via the transmission medium can be sequentially executed. That is, in addition to the recording medium, an operation specific to this embodiment can be executed using a program / data supplied externally via a transmission medium.

6 and 7 are flowcharts showing the overall operation of the mobile phone 1 that is started to be executed when the power is turned on.
First, when a power-on operation for turning on the power is performed (YES in step A1), the central control unit 11 starts power supply and executes a power-on process for initializing a predetermined memory or the like (step A2). ), A standby process for waiting for an incoming call while displaying a standby image by performing a standby process (step A3). Then, the decoration data whose “display flag” is “1” is read from the decoration data storage unit M2 and displayed on the sub-screen SD (step A4). Note that the decoration data is not always displayed in a fixed manner, and for example, another decoration data may be read out every predetermined time (for example, every 12 hours) and displayed on the sub screen SD. In this case, the “display flag” corresponding to the newly displayed decoration data may be set to “1”.

  When a predetermined setting operation is performed in the standby state (YES in step A5), a setting process corresponding to the operation is executed (step A6). If the setting operation is for the condition storage unit M1, its “content” , A setting process for changing the “setting flag” is performed, and if it is a setting operation for the decoration data storage unit M2, “data name”, “actual data”, “display flag” are newly registered, deleted, changed, etc. Perform the setting process. When a function activation operation for activating an arbitrary function is performed in the standby state (YES in step A7), it is checked whether the function activation operation is caused by the operation of the side key SK (step A8). If not by operation (NO in step A8), a predetermined function corresponding to the operation key is activated (step A11). For example, the mail function is activated in response to the operation of the mail key.

  If the function activation operation is performed by operating the side key SK (YES in step A8), a side key flag (not shown) is set to “1” to indicate that the side key SK has been operated. After (step A9), the style detection sensor 24 is accessed to detect the current style (step A10), and a predetermined function corresponding to the current style is activated (step 11). That is, when the side key SK is operated in the closed style, the manner mode setting function is activated, and when the side key SK is operated in the open style, camera shooting is activated, and the side key SK is operated in the view style. And activate the TV function. On the other hand, when an end operation is performed to designate the currently operating function and instruct the end of the function (YES in step A12), a process of resetting a side key flag (not shown) to “0” is executed. (Step A13), the designated function currently in operation is terminated (Step A14).

  In the standby state, a charging cable (not shown) is directly connected, or is installed (connected) on the installation base 6 connected to the charging cable, so that the charging detection unit 22 detects the start of charging. (YES in step A15), the charging operation to the internal battery (secondary battery) is started (step A16). On the contrary, if the charging detection unit 22 detects the end of charging by disconnecting the charging cable or disconnecting from the installation base 6 (YES in step A17), the charging operation is performed at that time. Is terminated (step A18).

When an incoming call is detected based on an incoming call signal from the wireless communication transceiver 14 (YES in step A19 in FIG. 7), the presence / absence of the incoming call response operation (off-hook operation) is checked (step A20). When the call is made, a call process for making the call ready is performed (step A21). If no off-hook operation is performed (NO in step A20), a ring tone is generated and incoming information is displayed on the sub screen SD. (Step A22).
This incoming information includes a message indicating that there was an incoming call, as well as the date and time of incoming call, the name and telephone number of the other party, and the decorative data displayed on the sub screen SD is deleted to switch the incoming information. However, the incoming information may be superimposed and displayed on the decoration data being displayed, and may be displayed in a specific area such as the lower side of the sub screen SD. Good.

  On the other hand, when it is time to detect the current usage status in the standby state (for example, once every 5 seconds) (YES in step A23), the refresh operation of the sub screen SD is performed according to the current usage status. The process proceeds to the refresh control process to be performed (step A24). When the power-off operation is performed (YES in step A25), the process proceeds to the power-off process (step A26). When another operation such as a volume adjustment operation or a transmission operation is performed (YES in step A27), a process corresponding to the operation such as a volume adjustment process or a transmission process is executed (step A28).

8 and 9 are flowcharts for explaining the refresh control process (step A24 in FIG. 7) in detail.
First, the central control unit 11 reads the previous refresh execution date and time from the refresh history storage unit M3, and whether a predetermined time (for example, 30 minutes) has passed since the previous refresh operation, that is, at the refresh execution timing at 30 minute intervals. It is checked whether it has been reached (step B1). If it is within 30 minutes from the previous refresh execution date and time (NO in step B1), the flow of FIGS. 8 and 9 is exited to avoid unnecessary (excessive) refresh operation. However, if 30 minutes have elapsed (YES in step B1), the “item” whose “setting flag” is “1” is read from the condition storage unit M1 as the execution condition of the refresh operation (step B2).

  Now, when the “item” whose “setting flag” is “1” is read from the condition storage unit M1, if the item is “style change” (YES in step B3), the detection signal from the style detection sensor 24 is detected. Based on the above, it is detected whether the style is being changed (step B4). If the style is not being changed (NO in step B5), the refresh operation execution condition is not met, so from the flow of FIG. 8 and FIG. However, if the style is being changed (YES in step B5), the refresh operation is executed (steps B6 to B13).

  First, it is checked whether or not decoration data is displayed on the sub screen SD (step B6). If decoration data is being displayed (YES in step B6), the polarity is reversed between the pair of electrodes constituting the sub screen SD. A refresh operation for alternately applying a higher pulse voltage (alternating voltage) is started (step B7). Then, after acquiring the current date and time from the RTC 18 as the current refresh execution date and storing it in the refresh history storage unit M3 (step B8), the decoration data storage unit M2 is accessed, and the “display flag” is “0”. Is read out and displayed on the sub screen SD (step B9).

  In other words, instead of the decoration data displayed before the current refresh operation, for example, among the decoration data whose “display flag” is “0”, the decoration data whose “display flag” is “1”. Data for decoration whose “display flag” is “0” that is stored next in the data is newly displayed, or data for decoration selected at random from the decoration data whose “display flag” is “0” Is newly displayed. When the decoration data is switched and displayed before and after the current refresh operation, the central control unit 11 also switches the “display flag” in accordance with the switching display and newly displays the decoration data. "Display flag" is changed to "1", and "display flag" of decoration data not displayed is changed to "0".

  If the decoration data is not displayed on the sub screen SD (NO in step B6), the current display content (for example, incoming call information) is stored in the display content storage unit M4 and temporarily saved (step B10). ), A refresh operation for alternately applying a strong pulse voltage (alternating voltage) having a reverse polarity between the pair of electrodes constituting the sub screen SD is started (step B11). Then, after acquiring the current date and time from the RTC 18 as the current refresh execution date and storing it in the refresh history storage unit M3 (step B12), the display content temporarily saved in the display content storage unit M4 (for example, incoming call) Information) is read out and redisplayed on the sub-screen SD (step B13).

  On the other hand, if the “setting flag” read from the condition storage unit M1 is “1” and the “item” is “style” (YES in step B14), the current style is determined based on the detection signal from the style detection sensor 24. It is detected (step B15), and it is checked whether it corresponds to the style (view style or open style) indicated by “content” of the “item” (step B16). That is, it is checked whether the current style corresponds to the view style or the open style as the refresh operation execution condition. If the style does not correspond to the “content” (NO in step B16), the refresh operation execution condition is met. 8 and FIG. 9 is not performed, but if the style corresponds to the “content” (YES in step B16), the above-described refresh operation is performed (steps B6 to B13).

  If the “setting flag” read from the condition storage unit M1 is “1” and the “item” is “charge” (YES in step B17 in FIG. 9), the charge detection unit 22 is accessed to perform charge detection. As a result (step B18), if the battery is not being charged (NO in step B19), the process goes out of the flow of FIGS. 8 and 9 because it does not correspond to the execution condition of the refresh operation. ), The above-described refresh operation is executed (steps B6 to B13 in FIG. 8). If the “item” with “setting flag” “1” is “installation base” (YES in step B20), the result of the installation detection by accessing the installation base detection unit 23 (step B21) If it is not installed at 6 (NO at step B22), the flow goes out of the flow of FIGS. 8 and 9 because it does not correspond to the execution condition of the refresh operation, but if it is installed at the installation table 6 (YES at step B22). Then, the above-described refresh operation is executed (steps B6 to B13 in FIG. 8).

  If the “setting flag” read from the condition storage unit M1 is “1” and the “item” is “function” (YES in step B23), the currently operating function is detected (step B24). It is checked whether the function (television function or camera function) indicated by “content” of “item” is applicable (step B25). If the function does not correspond to the “content” (function other than the TV function and the camera function) (NO in step B25), it does not correspond to the execution condition of the refresh operation, and thus the flow of FIGS. 8 and 9 is omitted. If the function corresponds to the “content” (YES in step B25), the above-described refresh operation is executed (steps B6 to B13 in FIG. 8).

  If the “item” with the “setting flag” “1” is not “function” (NO in step B23), it is determined that the “item” is “side key function”, and the process proceeds to step B26. In addition to detecting the function in operation, it is checked whether the above-mentioned side key flag is “1” (step B27). That is, it is checked whether the function currently being operated is a function operated by operating the side key SK. If the function is operated by operating the side key SK (YES in step B27), the currently operating function is Then, it is checked whether the function (camera function) indicated by the “content” of the “item” corresponds (step B28).

  If the function currently being operated is not a function operated by the side key SK (NO in step B27), or a function operated by operating the side key SK does not fall under “content” (camera function) 8 (NO in step B28), the flow exits from the flow of FIGS. 8 and 9 because it does not correspond to the execution condition of the refresh operation. However, if it is a function of “content” corresponding to the condition (step The process proceeds to the above-described refresh operation (steps B6 to B13 in FIG. 8).

  As described above, in the mobile phone 1 including the sub screen SD that performs the display operation using the charged particles that move according to the applied voltage, the central control unit 11 determines the current usage status of the mobile phone 1. Since the refresh operation to the sub screen SD is controlled, whether or not to perform the refresh operation of the sub screen SD can be appropriately controlled according to the current use state, and “flickering of display by the refresh operation” can be controlled. It is possible to prevent the user from seeing as much as possible.

  Since the content displayed on the sub screen SD is stored in the display content storage unit M4, the content of the display content storage unit M4 is read after the refresh operation and displayed again on the sub screen SD. The refresh operation can be performed without changing the display contents before and after the operation and without being noticed by the user. In this case, since the content displayed on the sub screen SD is stored in the display content storage unit M4 and temporarily saved before performing the refresh operation, the display content is stored at least during the refresh operation. It's enough.

  In addition, since the contents different from the contents displayed on the sub screen SD before the refresh operation are displayed on the sub screen SD after the refresh operation, it is always possible from the viewpoint of preventing the aggregation of charged particles and the occurrence of bias. In addition to displaying the same contents, the display contents can be appropriately changed according to the refresh operation. In particular, in the case of a decorative image or the like, it is also possible to enhance entertainment by automatically changing the display content.

  Since whether or not to perform the refresh operation is controlled from the elapsed time from the previous refresh operation and the current usage status, even if the usage status of the terminal device suitable for performing the refresh operation is When the elapsed time from the refresh operation is short, the refresh operation can be avoided and the useless refresh operation can be omitted.

  When the current style is a predetermined style, control is performed so as to perform the refresh operation. For example, when the sub screen SD is hidden, the refresh operation is performed without being noticed by the user. It becomes possible.

  In addition, when the style is changed, the refresh operation is controlled so that the user does not see or use the sub screen SD when the style is changed. Therefore, it is possible to perform the refresh operation without causing any disadvantage to the user.

  When it is detected that the apparatus main body is installed on the installation table 6, the refresh operation is controlled so that the user can display the sub screen SD in the state where the apparatus is installed on the installation table 6. Since it can be assumed that the user is not viewing or using the device, the refresh operation can be performed without penalizing the user.

  When it is detected that charging is in progress, the refresh operation is controlled so that it is assumed that the user does not see or use the sub screen SD during charging. As a result, the refresh operation can be performed without detriment to the user.

  When the function currently being operated is a predetermined function, the refresh operation is controlled so that the refresh operation can be performed when a function suitable for the refresh operation is in operation. . For example, in the case of a function that does not use the sub screen SD, the refresh operation can be performed without the user's knowledge.

  When the predetermined function is activated by the operation of the side key SK, the refresh operation is controlled so that the user does not see or use the sub screen SD when operating the side key SK. Therefore, it is possible to perform the refresh operation without causing any disadvantage to the user.

  In addition to the main screen MD for displaying information, it has a sub-screen SD mainly for decoration display, and a refresh operation is performed on this sub-screen SD. Can be configured by an electrophoretic display.

In the above-described embodiment, the electronic paper is exemplified as the electrophoretic display. However, the present invention is not limited to this, and any electrophoretic display that performs a display operation using the electrophoretic phenomenon may be used.
In the above-described embodiment, “style change”, “style”, “charge”, “installation table”, “condition” for controlling whether or not to perform the refresh operation based on the current usage state. “Function” and “Side key function” are exemplified, but the condition for controlling whether or not to perform the refresh operation is not limited to this. For example, in the case of “function”, the condition contents include a TV function and a camera. In addition to the functions, a transmission function and a recording / recording / playback function may be included. That is, since there is a high possibility that the sub screen SD is not used or the sub screen SD is not viewed during the operation of the transmission function and the recording / recording / playback function, the refresh operation may be performed during those operations. . In addition, a contact sensor is arranged on the surface of the mobile phone, and a refresh operation is performed on the condition that the state where the human body is not in contact continues for a predetermined time or longer, or no operation continues for a predetermined time or longer A refresh operation may be performed on the condition.

  In the above-described embodiment, the content displayed on the sub screen SD is stored in the display content storage unit M4 and temporarily saved before performing the refresh operation. However, instead of saving the actual data, the sub screen You may make it memorize | store what kind of content is displayed on SD with a flag.

In the above-described embodiment, the case where incoming information is displayed in addition to the decoration data as the contents displayed on the sub screen SD has been shown. However, the current date and time, the remaining battery level, etc. are simply displayed on the sub screen SD. It may be.
Further, the sub screen SD is not limited to being configured by an electrophoretic display, and the main screen MD may be configured by an electrophoretic display.

  In addition to a mobile phone, for example, a terminal device such as a PC, a PDA, a digital camera, or a music player having a display screen that performs a display operation using charged particles that move according to an applied voltage. The same applies.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
Time measuring means for measuring the elapsed time from the previous refresh operation;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means and a timing result by the timing means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
Changing the execution interval of the refresh operation according to the detection result by the detection means;
A terminal device characterized by being configured as described above.

(Appendix 2)
It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
The detection means detects the current style as the usage status,
The refresh control means controls to perform the refresh operation when the style detected by the detection means is a predetermined style;
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 3)
It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
The detection means detects that the style has been changed as the current usage status,
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the style has been changed;
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 4)
The detection means detects that the apparatus main body is installed on a predetermined installation base as a use situation,
The refresh control means controls the refresh operation to be performed when it is detected by the detection means that an apparatus main body is installed on an installation table.
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 5)
The detection means detects that the battery is being charged as a usage status;
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the battery is being charged;
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 6)
The detection means detects a function in operation as a use situation,
The refresh control unit controls the refresh operation to be performed when a function in operation detected by the detection unit is a predetermined function;
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 7)
The detection means detects that a predetermined function is activated by an operation of an operation unit provided on a side surface of a casing constituting the apparatus main body as a usage state,
The refresh control means controls to perform the refresh operation when it is detected by the detection means that a predetermined function is activated;
The terminal device according to Supplementary Note 1, wherein the terminal device is configured as described above.

(Appendix 8)
A second display means different from the first display means;
This second display means is mainly a display means for displaying information,
The first display means is mainly a display means for decoration display.
The terminal device according to supplementary note 1, wherein:

(Appendix 9)
Against the computer,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
A function of measuring the elapsed time from the previous refresh operation;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status and the elapsed time;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
A function of changing an execution interval of the refresh operation according to the use state;
A program to realize

DESCRIPTION OF SYMBOLS 1 Mobile phone 4 Charging cable 6 Installation stand 11 Central control part 12 ROM
13 RAM
14 Wireless communication transceiver 16 Display unit 17 Operation unit 18 RTC
20 Camera imaging unit 22 Charge detection unit 23 Installation stand detection unit 24 Style detection sensor SK Side key MD Main screen SD Sub screen M1 Condition storage unit M2 Decoration data storage unit M3 Refresh history storage unit M4 Display content storage unit

Claims (14)

It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Equipped with,
The detection means detects the current style as the usage status,
The refresh control means controls to perform the refresh operation when the style detected by the detection means is a predetermined style;
A terminal device characterized by being configured as described above . It is a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the style has been changed as the current usage status,
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the style has been changed;
End terminal device you characterized in that as. First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the apparatus main body is installed on a predetermined installation base as a use situation,
The refresh control means controls the refresh operation to be performed when it is detected by the detection means that an apparatus main body is installed on an installation table.
End terminal device you characterized in that as. First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that the battery is being charged as a usage status;
The refresh control unit controls the refresh operation to be performed when the detection unit detects that the battery is being charged;
End terminal device you characterized in that as. First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects a function in operation as a use situation,
The refresh control unit controls the refresh operation to be performed when a function in operation detected by the detection unit is a predetermined function;
End terminal device you characterized in that as. First display means for performing a display operation using a charged body that moves according to an applied voltage;
Refresh means for performing a refresh operation by applying a predetermined alternating voltage to the first display means;
A detection means for detecting the current usage status;
Refresh control means for controlling whether or not to perform the refresh operation based on a detection result by the detection means;
Storage means for storing contents displayed on the first display means before starting the refresh operation;
Depending on the usage status detected by the detection means, after the refresh operation, either the content stored in the storage means or the content different from the content stored in the storage means Display control means for displaying on the first display means;
Comprising
The detection means detects that a predetermined function is activated by an operation of an operation unit provided on a side surface of a casing constituting the apparatus main body as a usage state,
The refresh control means controls to perform the refresh operation when it is detected by the detection means that a predetermined function is activated;
End terminal device you characterized in that as. Further comprising time measuring means for measuring the elapsed time from the previous refresh operation by the refresh means,
The refresh control unit controls whether or not to perform the refresh operation based on a detection result by the detection unit and a timing result by the timing unit;
The terminal device according to claim 1, wherein the terminal device is configured as described above. A second display means different from the first display means;
This second display means is mainly a display means for displaying information,
The first display means is mainly a display means for decoration display.
Terminal device according to any one of claims 1 to 7, characterized in that. For a computer that controls a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body ,
A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
The ability to detect usage,
A function for controlling whether or not to perform the refresh operation based on the usage status;
A function of storing contents displayed on the first display means before starting the refresh operation;
Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
Realized ,
The detecting function detects the current style as the usage status,
The function to control is controlled to perform the refresh operation when the style detected by the detecting function is a predetermined style.
Program for.   For a computer that controls a terminal device that can be changed to a style according to the arrangement state of the housing constituting the device body,
  A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
  The ability to detect usage,
  A function for controlling whether or not to perform the refresh operation based on the usage status;
  A function of storing contents displayed on the first display means before starting the refresh operation;
  Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
  Realized
  The detecting function detects that the style has been changed as the current usage status,
  The function to control is controlled to perform the refresh operation when it is detected that a style has been changed by the function to be detected.
  Program for.   For the computer that controls the terminal device,
  A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
  The ability to detect usage,
  A function for controlling whether or not to perform the refresh operation based on the usage status;
  A function of storing contents displayed on the first display means before starting the refresh operation;
  Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
  Realized
  The function to detect is to detect that the apparatus main body is installed on a predetermined installation base as a usage situation,
  The function to be controlled is to perform the refresh operation when it is detected by the function to be detected that an apparatus main body is installed on an installation table.
  Program for.   For the computer that controls the terminal device,
  A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
  The ability to detect usage,
  A function for controlling whether or not to perform the refresh operation based on the usage status;
  A function of storing contents displayed on the first display means before starting the refresh operation;
  Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
  Realized
  The detecting function detects that the battery is being charged as a use situation,
  The function to control is controlled to perform the refresh operation when it is detected that charging is performed by the function to detect,
  Program for.   For the computer that controls the terminal device,
  A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
  The ability to detect usage,
  A function for controlling whether or not to perform the refresh operation based on the usage status;
  A function of storing contents displayed on the first display means before starting the refresh operation;
  Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
  Realized
  The function to detect detects the function in operation as a use situation,
  The function to be controlled is controlled so as to perform the refresh operation when a function in operation detected by the function to be detected is a predetermined function.
  Program for.   For the computer that controls the terminal device,
  A function of performing a refresh operation by applying a predetermined alternating voltage to the first display means that performs a display operation using a charged body that moves according to an applied voltage;
  The ability to detect usage,
  A function for controlling whether or not to perform the refresh operation based on the usage status;
  A function of storing contents displayed on the first display means before starting the refresh operation;
  Depending on the use situation, after the refresh operation, before the refresh operation is started, any one of the content stored by the function to be stored and the content different from the content stored by the function to be stored A function for displaying the contents of the first display means;
  Realized
  The function to detect is to detect that a predetermined function is activated by an operation of an operation unit provided on a side surface of a housing constituting the apparatus body as a use situation,
  The function to be controlled is to perform the refresh operation when it is detected that a predetermined function is activated by the function to be detected;
  Program for.

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