JP2002297089A - Display device and input system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To renew display from the display screen of a display device by using an input device, such as electronic pen having a constitution which is electrically and mechanically simple. SOLUTION: This display device is provided with leads (contact electrodes) 103 for every pixel on its display screen. Each contact electrode 103 is connected to a row electrode or a column electrode, which applies voltage to ferroelectric high-molecular liquid crystal, and when the contactor 118 of an electronic pen in which a power source is incorporated is brought into contact with the contact electrode 103, a voltage is applied between a row electrode and a column electrode through the contact electrode 103. As a result, the alignment of the ferroelectric polymer liquid crystal is changed and the display is renewed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a flat panel display or a paper-like flexible electronic paper whose display can be updated by an input device such as an electronic pen, and the display device and the input device. Related to an input system.

[0002]

2. Description of the Related Art With the development of the information society, not only personal computers but also various types of information devices such as portable information terminals and Internet appliances have been widely used. Accordingly, input devices have been diversified. For example, a keyboard is one of the typical input devices mainly used for character input, but it is not intuitive because it replaces characters used by humans with codes used by computers by the user's own keystrokes. There is. Also, considering the size of a human finger, there is a limit to reducing the size of the keyboard. For this reason, depending on the information equipment, an input device that can draw characters and graphics on a display surface of a display device such as a CRT (Cathode Ray Tube) display, a flat panel display, and electronic paper may be preferred. In order to draw characters and graphics on the display surface of the display device as it is, it is necessary to somehow associate the position on the display surface of the input device with the display content at that position. For that purpose, for example, the position on the display surface of the input device may be specified, and the display data may be updated according to the specified position. Input devices capable of specifying a position on a surface include a digitizer and a light pen.

A digitizer includes a stylus or a cursor for a user to specify a position on a flat plate, and circuits arranged on the flat plate in a grid pattern. In the digitizer, one of the stylus side and the circuit side detects an electric field, a magnetic field, and an electromagnetic field signal emitted from the other, thereby specifying a position on a flat plate specified by a user. In addition, the digitizer detects the pressure when the stylus is pressed against the flat plate using a pressure sensor provided on the flat plate side, receives the ultrasonic signal oscillated from the cursor on the flat plate side, and so on. Some also specify the location of

A light pen is an input device mainly used to specify a position on a display surface of a CRT. An optical sensor is provided at the pen tip of the light pen. In the CRT, since the electron beam is scanned on the display surface at a predetermined frequency, the position on the display surface can be specified by detecting the electron beam with the optical sensor at the tip of the light pen.

If the display data is updated in accordance with the position on the surface specified by using a digitizer or a light pen as described above, characters and figures can be drawn on the display surface of the display device as they are. is there.

[0006]

By the way, an input device such as a digitizer or a light pen is not physically connected to a display circuit of a display device. Since an electromagnetic field signal, an ultrasonic signal, light, a pressure signal and the like mediate between the display device and the input device, the response speed and the detection resolution are limited accordingly. Further, a circuit and software on the display device side for detecting a signal from the input device tend to be complicated, and the cost increases accordingly.

The present invention has been proposed based on the above-mentioned conventional circumstances, and is an inexpensive display device which ensures high response speed and input accuracy, and an input system including the display device and the input device. The purpose is to provide.

[0008]

The present invention employs the following means to achieve the above object. First, the means is assumed to be a display device such as an electronic paper that can be displayed by applying a voltage from both sides of a display of a nonvolatile display medium, and an input system including the display device and an input device such as an electronic pen. It will be described as.

As shown in FIG. 1, a lead (contact electrode) 103 is provided for each pixel on the display surface of the electronic paper 10. As shown in FIG. 10, the lead 103 is electrically connected to the row electrode on the front and back of the nonvolatile display medium and the row electrode A5 of the column electrode via the through hole 100. On the other hand, one end of an electronic pen 114 having a battery is connected to the column electrode. When the nib (contact) 118 of the electronic pen 114 comes into contact with the lead 103, the row electrode A
A voltage is applied between 5 and the column electrode, and the display on the nonvolatile display medium is updated. This update includes not only writing but also erasing.

Furthermore, in the display device as described above, as shown in FIG. 10, keep a switch unit 101 for switching whether to separate the row electrodes A ₅ which lead 103 is electrically connected to each pixel preferable.

[0011] and input data from the outside, when displaying the display data stored in the storage unit 19 does not separate the row electrodes A ₅ for each pixel by the switching means 101,
When updating the display may be separate row electrodes A ₅ for each pixel by the switching means 101. by this,
It is possible to achieve both display of input data from the outside and the like and update of display of each pixel by the electronic pen 114.

The ON / OFF of the switch means 101 (whether or not to separate each pixel) is controlled by, for example, a control line 105.

Next, the above-mentioned means will be described on the premise of a display device such as a flat panel display for performing display according to the storage of the storage means using a volatile display medium, and an input system.

When a volatile display medium is used for display,
Since the display data cannot be stored by itself, a separate storage unit 19 is required as shown in FIG.

The display on the flat panel display 30 is performed in accordance with the display data stored in the storage means 19.

As shown in FIGS. 12 and 13, similarly to the electronic paper 10 described above, a lead 103 is provided for each pixel on the display surface of the flat panel display 30 as well. Further, the flat panel display 30
Is provided with detection means 106. When the contact 118 of the electronic pen 114 comes into contact with the lead 103, the electric signal input from the lead 103 is detected by the detecting means 10.
6 is detected. When the display data in the storage unit 19 is updated based on the detection result by the detection unit 106,
The display on the flat panel display 30 is also updated.

The above-described display medium may be a medium having a shutter function or a medium capable of spontaneously emitting light.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) In Embodiment 1, the present invention is applied to an electronic paper and an electronic pen which are flexible display devices such as paper.

As shown in FIG. 2, the electronic paper 10 comprises a display section 11 on which a display surface on which data is displayed is arranged, and a display drive section 12 for driving the display section 11. As shown in FIG. As shown, the display unit 11 has a display layer A on which a nonvolatile display medium is arranged, and a light emitting layer B for illuminating the display layer A.

As for the display layer A, as shown in FIG.
First, a plurality of parallel linear electrodes serving as column electrodes A ₃ are formed on the base film A ₂ , and a plurality of parallel linear electrodes serving as row electrodes A ₅ are provided on the base film A _6. Form. Furthermore, previously coated with a ferroelectric liquid crystal polymer A ₄ at a constant thickness on the electrode as a row electrode A _5. Then, the base film A ₂ and the base film A ₆ and both electrodes are bonded in a state of opposing and orthogonal. Thus, the arranged both electrodes between the base film A ₆ in the base film A ₂ and the lower on the upper side in the drawings, to constitute a matrix form column electrodes A ₃ of and the row electrodes A ₅ become. Furthermore, after the molecules of the ferroelectric liquid crystal polymer A ₄ to a predetermined orientation, from both sides of the base film A ₂ and the base film A ₆ so as to sandwich the polarizing plate A ₁ · A ₇ by bonding them. Thereby, for example, FIG.
As shown in the figure, a display layer A composed of pixels arranged in a matrix of Cmax columns and Rmax rows is configured. In addition, the above row electrode,
It goes without saying that the vertical positional relationship of the column electrodes may be reversed.

On the other hand, the entire surface of the light emitting layer B is
Since it is sufficient to emit light uniformly, the upper base film B₁ 
Transparent common electrode (anode) B on top_Two Together with the bottom
Side base film B₆ Metal common electrode (cathode) B on top_Five 
To form The common electrode B _Five On the insulating layer B_Three For
And the organic electroluminescent layer B in a predetermined pattern
_Four After forming the common electrode B_Two And common electrode B_Five And
The light-emitting layer B is bonded so as to face the light-emitting layer B.
You.

Finally, the light emitting layer B generated as described above is bonded to the lower side of the display layer A so that the light emitting layer B illuminates the display layer A.

In the display layer A, each pixel is turned on and off.
Is controlled using the shutter function described below.
This is performed by trick control. That is, the row voltage of the display layer A
Pole A _Five ・ Column electrode A_Three When a predetermined voltage is applied during
Ferroelectric polymer liquid crystal in the direction that does not transmit light from optical layer B
A_Four Changes the orientation of the molecule (when the shutter is on)
The row electrode A_Five And column electrode A_Three Identified by
Pixel is displayed in black. On the other hand, a reverse voltage of the predetermined voltage
When a ferroelectric polymer is applied,
Liquid crystal A_Four Orientation of the molecule changes (shutter is off)
This pixel is displayed in white.

Since the display state of the ferroelectric polymer liquid crystal A ₄ does not change even when the power is turned off, the electronic paper 10 is detached from the main body 20 and the row electrodes, Even if a predetermined voltage is not applied to the column electrodes, the display is maintained.

On the other hand, when a voltage is applied between the common electrodes B ₂ and B _{5 of the} light emitting layer B, the organic electroluminescent layer B ₄
Illuminates the display layer A from below. That is, when the organic electroluminescent layer B ₄ emits light,
Pixels that transmit this light (pixels whose shutters are off) are displayed in black.

Since the light emitting layer B is assumed to emit light on the entire surface at the same time, the upper and lower electrodes are both common electrodes, but the upper and lower common electrodes B ₂ and B ₅ are formed in a matrix. By controlling so that only a specific portion of the display layer A can be irradiated, for example, only the title portion can be displayed (or emphasized).

When the light emitting layer B emits monochromatic light, a monochromatic electroluminescent layer may be formed uniformly over the entire surface as described above. Red Green Blu
e) Arrange the light source. In the case where light is emitted uniformly over the entire surface even in full color, it is sufficient to simultaneously emit light from the RGB electroluminescent layers with the common electrodes B ₂ and B ₅ , without using individual electrodes as described above.

Further, the base film A ₂ · A _{6 of the} display layer A
Alternatively, it is preferable that _one of the surfaces of the base film B1 of the light-emitting layer B is formed rough. Thus, as shown in FIG. 6, the light emitting the organic electroluminescent layer B ₄ is scattered by the rough surface S, it will be able to provide a friendly display to the eyes of the user.

If a plurality of electronic papers 10 are bound as described above, a file-like electronic paper file can be constructed. In the first embodiment, the main body 20 of the electronic paper file and the electronic paper 10 are configured to be physically and electrically detachable.

As shown in FIG. 7, in the electronic paper file, the display drive unit 12 of the electronic paper 10 is provided with one connection terminal 13 (female type in this case) of the connector, and the main body 20 is provided with the other connection terminal 13. Connection terminal 21 (here, male type)
Is provided. As described above, the connection terminal 13 on the electronic paper 10 side is of a female type and the connection terminal 21 on the main body 20 is of a male type, when the electronic paper 10 removed from the main body 20 is carried. This is for preventing the connection terminal 13 from being damaged or rusted.

When controlling pixels arranged in a matrix of Cmax columns and Rmax rows as described above, "Cmax + Rmax"
The connection terminal 13 having the number of pins (the connection terminal 21 having the pin receivers of the number “Cmax + Rmax”) is required at least. However, the connection terminal 13 having a large number of pins
Not only has the drawback of being easily damaged, but is also not preferable from the viewpoint of reducing the thickness and weight of the electronic paper file.

Therefore, in the electronic paper 10, FIG.
As shown in (1), a display driver 12a used for a normal LCD display device is mounted between the connection terminal 13 of the electronic paper 10 and the display unit 11 (that is, the display drive unit 12).
The number of pins of the connection terminal 13 is reduced (described later).

As shown in FIG. 3B, the thickness of the display drive unit 12 is made larger than the thickness of the display unit 11 so that the electronic paper 10 and the main body 20 can be easily attached and detached. It is preferable to use a member having a Young's modulus higher than that of the display unit 11 as a member used for the unit 12. As a result, the display driver 12a formed of a semiconductor chip can be protected. Furthermore, if the width of the display drive unit 12 is made wider than the width of the display unit 11, as shown in FIG. 8, the display drive unit 12 can be securely pushed by a simple method such as pressing the display drive unit 12 with a finger in the direction of the arrow. The connection terminal 13 of the electronic paper 10 is connected to the connection terminal 21 of the main body 20.
Can be attached to

As shown in FIG. 7, the electronic paper file main body 20 has signal transmission / reception means 23 (23a and 23a).
b) is provided.

The signal transmission / reception means 23 is means for receiving display data. More specifically, as shown in FIG. 7, a driver 23a for reading a signal storage medium such as a flash card or a smart media, or an external A connector 23b such as a serial port / parallel port / RS-232C which takes in a signal from the electronic paper directly to the electronic paper via a cable or via a storage means 19 for storing data.

The data displayed on the display unit 11 of each electronic paper 10 spelled in the electronic paper file is display data inputted from outside through the signal transmitting / receiving means 23. As shown in FIG. 1, a path between the signal transmitting / receiving means 23 and the electronic paper 10 is connected to the signal transmitting / receiving means 2.
In some cases, storage means 19 for storing the data input from 3 is provided. When the storage unit 19 is provided, the data stored in the storage unit 19 may be displayed.

In order to display the display data on the display unit 11 of the electronic paper 10,
It is necessary to apply a voltage to the display layer A and the light emitting layer B, or to execute display control. These light emission control and display control are performed by a display light emission control means (display light emission control means: display control means 22a and light emission control means 22b provided in the back plate 24 of the main body 20 as shown in FIG.
(The two means may be one body or separate bodies) 22.

The display light emission control means 22 and the display section 10 (the row electrode A ₅ , the column electrode A ₃ or the common electrodes B ₂ and B ₅ )
The connector (that is, the connection terminal 21 and the connection terminal 1)
3) connected through. Note that the display control performed by the display light emission control means 22 (or the light emission control means 22b) is not the essence of the present invention, and therefore detailed description is omitted here.

The electronic paper 10 transmits data stored externally or in the storage means 19 to the display light emission control means 2.
2 are displayed under the control of the user 2. Further, the user can freely write or delete desired items from the display surface of the display unit 10 using the electronic pen 114, and display them on the display unit 10. Can be displayed.

As shown in FIGS. 10A and 10B, a column electrode A ₃ disposed on the back side of the base film A ₂ on the front side of the electronic paper 10 corresponds to each pixel. via the through hole 100 is led to the surface of the polarizing plate a _1,
Here, it is connected to one end of the switch means 101 via the lead 103 (contact electrode). From the other end of the switch means 101 again via the lead 104 and the through-hole 100 and configured to guide the back side of the base film A _2. Therefore, the switch means 101 is inserted between the pixels adjacent in the column direction, and when all the switch means 101 are turned on, the original column electrode is formed. When the switch means 101 is turned off, the contact electrode is connected to a predetermined pixel. A unique contact electrode will be formed. Of course, the display light emission control means 22 can turn on and off the switch means 101 group according to the purpose.
The control line 105 should be disposed on the polarizing plate A _1. still,
The spacing between the through holes 100 is 1 in the current technology.
Since the thickness can be set to about 0 μm, the above configuration does not hinder the display state.

On the other hand, as shown in FIG. 11, to derive the lead from the rear end of the electronic pen 114 to form a contact 118 at the distal end, for connecting the leads to the common row electrode A ₅ of the electronic paper. A power supply is connected between the contact 118 of the electronic pen 114 and the lead (for example, a battery is built in the electronic pen 114).

In the electronic paper 10 (or an input system including the electronic paper 10 and the electronic pen 114), data input from the outside or the storage unit 1
When displaying the data stored in the electronic paper 9 on the display surface of the electronic paper 10, the switch means 101 group is turned on.

On the other hand, when the display contents of the electronic paper 10 are updated using the electronic pen 114, each switch means 101 is turned off. When the contact 118 of the electronic pen 114 comes into contact with the lead (contact electrode) 103 led out to the surface of the polarizing plate A ₁ as described above, a potential is applied to the lead 103. Thus, the row electrode A ₅ was in the common electrode, the contact 1 of the electronic pen 114
18 a voltage between the corresponding positions of column electrodes A ₅ corresponding to the leads 103 in contact with is applied, so that it is write for that pixel. At the time of erasing, a voltage opposite to that at the time of writing may be applied.

Here, the contact 11 of the electronic pen 114
The switching means 107 such as a switch capable of switching the switch 8 between a positive voltage and a reverse voltage is connected to the pen 114.
By providing the switching means 1 at a predetermined position.
It is possible to easily select “write” or “erase” only by the operation of 07. Furthermore, if a switch or the like for applying a reverse voltage to the entire surface of the display layer A of the electronic paper 10 is provided at a predetermined location of the electronic paper 10, data on the display layer A can be erased collectively.

The above configuration merely shows a configuration in which writing or erasing can be directly performed on the electronic paper 10. However, the state of writing or erasing in this way is reflected in the storage contents of the storage means 19. Attempts are as follows.

[0046] That is, the leads of the electronic pen 114 at a significantly faster rate than the movement of the hand, by switching on the line below the line above the connection of the row electrodes A _5, the electronic pen 114
Are detected on a line-by-line basis. Further, the contact 118 of the electronic pen 114 is
₁ is in contact with the lead 103 on the control line 1
The detection is performed on a column basis through the detection line 05 or a separately provided detection line. As shown in FIG. 1, the detection signal Sl on a row basis and the detection signal Sr on a column basis are input to a detection means 106, where a write position (erase position) is detected and the switching means Based on the switching signal from 107, it is determined which of the writing and erasing has been instructed. As a result, data to be stored in the storage unit 19 is generated, and the content of the storage unit 19 is updated with the data.

In the above description, it is necessary for the display light emission control means 22 or the storage means 19 to recognize which electronic paper 10 is to be updated, but the switch means 101 is turned off by the control line 104.
It is only necessary to confirm the electronic paper 10 that is set to.

In the first embodiment, even if the row electrode A
_Five, Column electrode A_ThreeOr common electrode B _Two・ B_FivePower is connected to
Even if it is not done (natural light is sufficient for the backlight),
The display of the par 10 itself is applied by the electronic pen 114.
This is done based on the applied voltage.

As described above, the display on the electronic paper 10 is updated only by bringing the contact 118 of the electronic pen 114 into contact with the lead 113 exposed on the display surface. Structure for display updating is simple, and because the contact 118 to the row electrodes A ₅ by leads 103 are physically connected, is no longer necessary to mediate an electromagnetic field signal and ultrasound signal. Therefore, it is possible to provide an inexpensive display device and an input system while securing high response speed and input accuracy. Second Embodiment In the first embodiment, the present invention is applied to the electronic paper 10. However, the present invention is not limited to this, and the present invention may be applied to other devices such as a flat panel display 30 as shown in FIG. It is also possible to apply the present invention to a display device.

On the display surface of the flat panel display 30, similarly to the electronic paper 10, the lead 10
3 are arranged for each pixel.

However, unlike the electronic paper 10, it is not usually the case that only the panel is detached from the main body. Therefore, the display light emission control means 22 and the display driver 12a shown in FIG.
As shown in FIG. 13, the connection may be made directly without the connection terminals 21 and 13.

Further, it is not particularly necessary to dispose a nonvolatile display medium on the display layer A. Even when a display unit having the display layer A and the light emitting layer B is used for the display of the flat panel display 30, even if a volatile liquid crystal is arranged in the display layer A instead of the ferroelectric polymer liquid crystal. Good.

When a volatile display medium is used instead of a non-volatile display medium, the display contents are not stored by the display medium itself. Therefore, even when the display is updated by the electronic pen 114, it is necessary to store the update result. , Storage means 19 is required.

In order to reflect the update result on the display data in the storage means 19, the detection means 106 is also required.

The contact 118 of the electronic pen 114 is the lead 1
03, the voltage signal input from the lead 103 is detected by the detection means 106, and the detection means 106 updates the display data in the storage means 19 based on the detection result. When the display on the flat panel display 30 is performed based on the updated display data stored in the storage unit 19, the display on the flat panel display 30 is updated. Embodiment 3 In Embodiments 1 and 2, the display layer A
In the display section having the display layer A and the light emitting layer B, the alignment state of the liquid crystal of the display layer A is changed to display the update result and the like.
The present invention is applicable not only to a medium having a shutter function but also to a display medium capable of spontaneously emitting light.

For example, an electroluminescent panel is
The display can be performed only by the light emitting layer C as shown in FIG. 14 without using the display layer A in which the liquid crystal is arranged.

The light emitting layer C has a structure in which, for example, the ferroelectric polymer liquid crystal A ₄ of the display device A is replaced with an organic electroluminescent layer. That is, as shown in FIG. 14, in the light emitting layer C, a row electrode C ₂ , an organic electroluminescent layer C ₃ , a column electrode C ₄ , and a transparent flat plate C ₅ are arranged on a substrate C ₁ . Between the row electrode C ₂ and the column electrode C _4, it is not an organic electroluminescent layer C ₃ is disposed.

The light emission and non-light emission of the electroluminescent layer C ₃ are controlled for each pixel by bringing the contact 118 of the electronic pen 114 into contact with the lead 103, similarly to the on / off operation of the shutter in the first embodiment. do it.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is an external view of an electronic paper to which the present invention is applied.

FIG. 3 is a configuration diagram of electronic paper to which the present invention is applied.

FIG. 4 is a configuration example of a display layer and a light-emitting layer.

FIG. 5 is an explanatory diagram of a matrix.

FIG. 6 is an explanatory diagram of a rough surface.

FIG. 7 is an external view of an electronic paper file to which the present invention is applied.

FIG. 8 is a diagram showing another form of electronic paper to which the present invention is applied.

FIG. 9 is a diagram showing a display light emission control unit of an electronic paper file.

FIG. 10 is a diagram showing a relationship between a lead and an electrode.

FIG. 11 is a view showing the relationship between an electronic pen and electronic paper in the case of direct writing.

FIG. 12 is an external view of a flat panel display to which the present invention is applied.

FIG. 13 is a block diagram showing a basic configuration of a flat panel display to which the present invention is applied.

FIG. 14 is a configuration diagram of a light emitting layer of a flat panel display to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electronic paper 11 Display part 23 Signal transmission / reception means 22 Display emission control means 20 Main body 30 Flat panel display 19 Storage means 114 Electronic pen 103 Contact electrode 101 Switching means 105 Control line 106 Detecting means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 366 G09F 9/00 366A 5C094 9/30 343 9/30 343Z 5G435 9/40 9/40 Z G09G 3/36 G09G 3/36 F-term (reference) 2H089 HA18 QA12 RA13 TA02 TA18 2H092 GA62 NA01 NA29 PA13 QA13 RA10 5B087 AA01 AA02 AE09 BC22 CC01 5C006 AF31 AF33 BA11 BB11 5C080 AA02 BB06 DD05 BA27 BA49 CA19 CA24 DA06 DA08 HA08 5G435 BB05 CC09 DD16 EE49 LL08

Claims (9)

[Claims] 1. A display device capable of displaying by applying a voltage from both front and back surfaces of a nonvolatile display medium, comprising: a conductive member arranged for each display unit on a display surface and electrically connected to one of the front and back electrodes. A display device, comprising: a conductive member capable of performing the display by applying a voltage between an electrode that does not conduct with the conductive member and the conductive member. 2. The display device according to claim 1, further comprising: switch means for switching whether or not to separate the electrode to which the conductive member conducts for each display unit. 3. The display device according to claim 2, further comprising a control line for controlling said switch means. 4. A display device for performing display according to storage of a storage means using a volatile display medium, comprising: a conductive member disposed on a display surface for each display unit; and an electric signal input from the conductive member. A display unit for detecting a signal and updating the storage of the storage unit based on the detection result. 5. The display device according to claim 1, wherein the display medium is a medium having a shutter function. 6. The display device according to claim 4, wherein the display medium is a medium that can emit light spontaneously. 7. An input system comprising a display device capable of displaying by applying a voltage from both front and back surfaces of a nonvolatile display medium, wherein said electrodes are arranged on a display surface of said display device for each display unit and said front and rear electrodes are provided. An input system comprising: a conductive member that conducts to any one of the above; an electrode that does not conduct to the conductive member; and an input device capable of applying a voltage between the conductive member and the electrode. 8. The input system according to claim 7, further comprising switch means for switching whether or not to separate the electrodes to which the conductive member conducts for each display unit. 9. An input system comprising a display device for performing display according to storage of a storage means using a volatile display medium, comprising: a conductive member arranged for each display unit on a display surface of the display device; An input device, comprising: an input device capable of inputting an electric signal from the conductive member; and a detection unit that detects the electric signal and updates the storage of the storage unit based on a detection result. system.