JP2008039915A - Display device, input device, and display system - Google Patents

Abstract

A display device capable of writing on a display surface by a writing means (input device) in a state where display is performed by a display function, and an input device serving as writing means of the display device ( Writing pen).
The display device includes a plurality of pixels. Each of the plurality of pixels 53 includes a first display function in which a display state is set based on a data signal supplied via one data line of the plurality of data lines 51, and the display from the outside of the display device. And a second display function in which a display state is set based on an input signal to the display surface of the device.
[Selection] Figure 3

Description

  The present invention relates to a display device having a writing display function, an input device (writing pen) serving as writing means of the display device, and a display system.

In recent years, an image display medium using an electrophoretic method or the like has been provided (see, for example, Patent Document 1), and an electronic paper using a display device including such an image display medium has been proposed.
JP 2004-347719 A

Generally, a display device has a display function for displaying on a display surface based on data that is input with display data or stored in advance.
By the way, when the display device is used as electronic paper, there is a desire to add an underline or a memo to the display under a state where the display is performed by such a display function.
However, a display device as an electronic paper having such a function is not currently provided.

  The present invention has been made in view of the above circumstances, and the object of the present invention is a display device in which writing can be performed on a display surface by writing means under a state where display is performed by a display function, An object of the present invention is to provide an input device (writing pen) serving as a writing means of the display device and a display system.

In order to achieve the above object, a display device according to the present invention is a display device including a plurality of pixels, and each of the plurality of pixels includes data supplied via one data line of the plurality of data lines. A first display function in which a display state is set based on a signal; a second display function in which a display state is set based on an input signal to the display surface of the display device from outside the display device; It is characterized by having.
In the above display device, in addition to normal active driving, pen input to a kind of display screen is also possible.

In the display device, the second display function may use electromagnetic induction by the input signal.
Thereby, the input from the exterior of a display apparatus is attained by utilizing electromagnetic induction.

The display device according to the present invention includes a sensor coil including an electromagnetic induction coil corresponding to each of the plurality of pixels.
As a result, direct external input to each of the plurality of pixels becomes possible.
In the display device, the plurality of pixels may include a plurality of pixel groups, and may include a sensor coil including an electromagnetic induction coil corresponding to each of the plurality of pixel groups.

In the display device described above, a rectifying element that rectifies the induced power generated in the sensor coil may be further provided for each of the plurality of pixels.
In the above display device, the sensor coil may generate inductive power from the outside of the display device by electromagnetic induction of an input signal.
The display device may further include an electromagnetic induction antenna, and the electromagnetic induction antenna may receive an input signal from outside the display device.
In the above display device, each of the plurality of pixels may include an electrophoretic element as a display element.

An input device for inputting from the outside to the display device according to the present invention includes a power source, an oscillator, and an electromagnetic induction coil.
By using the above input device, input from the outside of an electronic device such as a display device becomes possible.
In the above input device, it is preferable that the display device generates inductive power by electromagnetic induction according to an output signal of the input device.
In the above input device, it is preferable that inductive power is generated by electromagnetic induction in each of a plurality of pixels included in the display device by an output signal of the input device.
A display system according to the present invention includes the display device and the input device.

According to one of the features according to the present invention, the display device has a writing display function, so that a writing signal is displayed on the display surface of the display panel by writing means in a state in which the display function is displaying. By inputting, writing can be performed on the display.
Further, in the display device, the display panel includes a sensor coil including an electromagnetic induction coil provided for each pixel or each pixel group, and rectified inductive power obtained by the sensor coil. Preferably, a rectifying element for applying a voltage to the display panel is provided, and the sensor coil is configured to generate inductive power by electromagnetic induction by the writing means.
In this way, an induction power is generated in the sensor coil by electromagnetic induction by the writing means, the induction power is rectified by the rectifying element, and a voltage is applied to the display panel, whereby the display surface in the display state is applied. Can be written.
In this display device, the writing means preferably includes a power source, an oscillator, and an output unit having an electromagnetic induction coil.
If it does in this way, by making it oscillate with the oscillator by a writing means and outputting magnetic flux from an electromagnetic induction coil, induction power can be generated in the sensor coil. Therefore, writing can be performed on the display surface in the display state by the induced power.
Further, the display device includes an electromagnetic induction antenna, and the display panel generates an induced power by inputting a magnetic signal from the outside by the electromagnetic induction antenna, and exhibits the display function by the induced power. It is preferable to be configured.
In this way, since electric power is generated by inputting an external magnetic signal via the electromagnetic induction antenna, there is no need to provide a power source such as a battery, so that the thickness of the entire apparatus can be further reduced. Therefore, it becomes easy to exhibit flexibility etc. as electronic paper.
In the display device, it is preferable that the display panel includes an electrophoretic element as a display element.
In this case, since the electrophoretic element has display retention, the display surface in which the display state is maintained by the writing unit in a state in which the state displayed by the electrophoretic element is maintained by the display function. Can be written to.
One aspect of the input device of the present invention is preferably in the form of a writing pen. The writing pen includes a power source, an oscillator, and an output unit having an electromagnetic induction coil.
According to this writing pen, the display is made by the writing display function by oscillating with an oscillator, outputting magnetic flux from the electromagnetic induction coil as a writing signal, and inputting the writing signal to the display surface of the display panel. Is possible.

The present invention will be described in detail below.
FIG. 1 is a diagram showing an embodiment of a display device of the present invention, and reference numeral 1 in FIG. 1 is a display device. The display device 1 includes a display panel 2 having a display function, and has a writing pen 3 as writing means (input device) that enables writing on the display panel 2.
In this embodiment, the display panel 2 has an electrophoretic element as a display element, and has an element substrate 4 and a transparent substrate 5 as shown in FIG. A microcapsule 6 in which an electrophoretic dispersion is sealed is sandwiched.

  The element substrate 4 is formed with a large number of drive elements (switching elements) 7 made of TFTs (thin film transistors) through an insulating layer (not shown) on the inner surface of a film-like flexible flexible substrate 4a made of resin or the like. In addition, pixel electrodes 8 are formed corresponding to the drive elements 7 respectively, thereby constituting an active matrix substrate. The driving element 7 includes a semiconductor film 9 provided on the insulating layer and the like, a gate electrode 11 provided on the semiconductor film 9 via a gate insulating film 10, and a source region of the semiconductor 9 (see FIG. A source electrode 12 connected to a drain region (not shown) of the semiconductor 9 and a pixel electrode (drain electrode) 8 connected to a drain region (not shown) of the semiconductor 9 are configured.

  An interlayer insulating film 13 is formed on the gate electrode 11 so as to cover the gate electrode 11, and the source electrode 12 passes through a contact hole 14 formed in the interlayer insulating film 13 on the interlayer insulating film 13. Is electrically drawn out and formed here. A relay electrode 15 is formed on the interlayer insulating film 13 by being electrically drawn out through a contact hole 16 formed in the interlayer insulating film 13. An interlayer insulating film 17 is formed to cover the relay electrode 15 and the source electrode 12, and a pixel electrode (drain electrode) 8 is electrically passed through the contact hole 18 on the interlayer insulating film 17. By being drawn out, the relay electrode 15 is formed in conduction.

  FIG. 3 is an equivalent circuit diagram of the display panel 2. In FIG. 3, reference numeral 7 denotes a driving element composed of the TFT described above. The drive element 7 has a scanning line 50 connected to its gate electrode, and the scanning line 50 applies a scanning signal to each gate electrode from a driver region (not shown). Further, a data line 51 is connected to the source electrode of the drive element 7, and the data line 51 applies a data signal to each source electrode from a driver region (not shown).

  A capacitive element 52 is provided on the drain electrode (pixel electrode 8) side of the drive element 7, and the capacitive element 52 holds the electric polarization state of the electrophoretic dispersion in the microcapsule 6. ing. In FIG. 3, reference numeral 53 denotes a single pixel. This pixel 53 has the microcapsule 6 between a pixel electrode 8 serving as a drain electrode of the driving element 7 and a common electrode described later. It is configured to be sandwiched.

  In the present embodiment, a resonance circuit 20 including a sensor coil 19 including an electromagnetic induction coil and a rectifier circuit 21 are provided on the pixel electrode (drain electrode) 8 side of the pixel 53. Yes. The resonance circuit 20 is configured to include the sensor coil 19 and the capacitor 22, and is configured such that the sensor coil (electromagnetic induction coil) 19 is electromagnetically induced by the writing pen 3 described later to generate inductive power. Is. In the present embodiment, as schematically shown in FIG. 4, the resonance circuit 20 has a 1: 1 correspondence with each pixel 53 (pixel electrode 8), for example, the pixel electrode 8. It circulates and is formed in a loop shape. Further, for example, as shown in FIG. 2, the gate electrode 11 is formed on the same layer, that is, the gate insulating film 10 with the same material (for example, aluminum) by the same process as the gate electrode 11.

  However, the sensor coil 19 is not formed on the same layer as the gate electrode 11 but on the same layer as the source electrode 12 and the relay electrode 15, that is, on the interlayer insulating film 13 by the same process as the source electrode 12. You may make it do. In addition, the resonance circuit 20 including the sensor coil 19 is not formed 1: 1 corresponding to each pixel 53 (pixel electrode 8), and for example, a total of four resonance circuits 20 including two vertically and horizontally. These pixels 53 may be a single pixel group 54, and one sensor coil 19 and a capacitor (not shown) may be provided for the pixel group 54 as shown by a two-dot chain line in FIG. Further, instead of providing the capacitor 22, only the sensor coil 19 may be provided instead of the resonance circuit 20. Further, the sensor coil 19 may be formed so as to circulate a plurality of times instead of once.

  As shown in FIG. 3, the rectifier circuit 21 includes a rectifier element (diode) 20a. The rectifying element 21 a (rectifying circuit 21) rectifies the induced power obtained by the sensor coil 19 and applies a voltage to the pixel 53 of the display panel 2. That is, the rectifier element 20a (rectifier circuit 21) is connected to the pixel electrode (drain electrode) 8 side of the pixel 53, thereby forming an electric field between the pixel electrode 8 and a common electrode described later. As will be described later, the electrophoretic particles in the microcapsule 6 are electrophoresed to achieve a desired display.

  As shown in FIG. 2, the transparent substrate 5 is formed by forming a transparent common electrode 23 made of ITO or the like on the inner surface of a film-like flexible transparent flexible substrate 5a made of a transparent resin. Is the display surface (observation surface). Here, as this transparent flexible substrate 5a, for example, polyethylene terephthalate (PET), polyethersulfone (PES), polycarbonate (PC) or the like is preferably used.

In addition, since the flexible substrate 4a that does not become the display surface side does not need to be transparent, in addition to the above materials, polyesters such as polyimide (PI) and polyethylene naphthalate (PEN), polyethylene (PE), Polystyrene (PS), polypropylene (PP), polyetheretherketone (PEEK), acrylic, polyacrylates, or the like can also be used.
In the present embodiment, flexible flexible substrates are used as the substrates 4a and 5a. However, when the display device does not require flexibility (flexibility) like a general panel, glass or A hard resin, or a semiconductor substrate such as silicon can also be used.

  Between the element substrate 4 and the transparent substrate 5 having such a configuration, the microcapsule 6 is disposed on the pixel electrode 8 in particular, and the microcapsule 6 thereby displays the display area of the display panel 2. Forming. As described above, the microcapsule 6 encloses an electrophoretic dispersion as a display material, and is formed to have substantially the same diameter, and has a diameter of, for example, about 30 μm. .

  The electrophoretic dispersion liquid is composed of electrophoretic particles and a liquid phase dispersion medium in which the electrophoretic particles are dispersed. Examples of the liquid phase dispersion medium include water, methanol, ethanol, isopropanol, butanol, octanol, methyl cellosolve and other alcohol solvents, ethyl acetate, butyl acetate and other esters, acetone, methyl ethyl ketone, methyl isobutyl ketone and other ketones. , Aliphatic hydrocarbons such as pentane, hexane and octane, alicyclic hydrocarbons such as cyclohexane and methylcyclohexane, benzene, toluene, xylene, hexylbenzene, hebutylbenzene, octylbenzene, nonylbenzene, decyl Aromatic hydrocarbons such as benzenes having long chain alkyl groups such as benzene, undecylbenzene, dodecylbenzene, tridecylbenzene, tetradecylbenzene, etc., halo such as methylene chloride, chloroform, carbon tetrachloride, 1,2-dichloroethane, etc. Emissions of hydrocarbons, can be used by blending a surfactant or the like to the carboxylate or other various oils, etc. alone or a mixture thereof.

The electrophoretic particles are organic or inorganic particles (polymer or colloid) having a property of moving by electrophoresis due to a potential difference in a liquid phase dispersion medium.
Examples of the electrophoretic particles include black pigments such as aniline black, carbon black, and titanium black, white pigments such as titanium dioxide, zinc white, and antimony trioxide, azo pigments such as monoazo, diisazone, and polyazo, and isoindolinone. Yellow pigments such as yellow lead, yellow iron oxide, cadmium yellow, titanium yellow, antimony, azo pigments such as monoazo, disazo, polyazo, red pigments such as quinacridone red, chrome vermilion, phthalocyanine blue, indanthrene blue, anthraquinone 1 type (s) or 2 or more types, such as a system pigment, blue pigments, such as bitumen, ultramarine blue, and cobalt blue, and green pigments, such as phthalocyanine green, can be used.

Furthermore, these pigments include, as necessary, charge control agents composed of particles of electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, compounds, titanium-based coupling agents, aluminum-based coupling agents. A dispersant such as a silane coupling agent, a lubricant, a stabilizer, and the like can be added.
As a material for forming the wall film of the microcapsule 6, a compound such as a composite film of gum arabic / gelatin, urethane resin, urea resin, urea resin can be used.

In the display device 1 of the present example, two types of electrophoretic particles are enclosed in the microcapsule 6, one being negatively charged and the other being positively charged. As these two types of electrophoretic particles, for example, titanium dioxide that is a white pigment and carbon black that is a black pigment are used. Then, by using such two types of white and black electrophoretic particles, for example, when displaying characters or the like, the characters or the like are displayed with black electrophoretic particles, and the background is displayed with white electrophoretic particles. Can be displayed.
Further, display may be performed by using only one type of electrophoretic particle and moving it to the common electrode 23 side or the pixel electrode 8 side.

  The microcapsules 6 are fixed to the transparent substrate 5 by a binder 24 on the common electrode 23, for example. As the binder 24, a binder having good affinity for the wall film of the microcapsule 6, excellent adhesion to the common electrode 23, and insulating properties can be used. For example, polyethylene, chlorinated polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polypropylene, ABS resin, methyl methacrylate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, vinyl chloride -Vinylidene chloride copolymer, vinyl chloride acrylate copolymer, vinyl chloride-methacrylic acid copolymer, vinyl chloride-acrylonitrile copolymer, ethylene-vinyl alcohol-vinyl chloride copolymer, propylene-vinyl chloride copolymer Polymer, thermoplastic resin such as vinylidene chloride resin, vinyl acetate resin, polyvinyl alcohol, polyvinyl formal, and cellulose resin, polyamide resin, polyacetal, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenyl Polymers such as oxide, polysulfone, polyamideimide, polyaminobismaleimide, polyethersulfone, polyphenylenesulfone, polyarylate, grafted polyfinylene ether, polyetheretherketone, polyetherimide, polytetrafluoroethylene, polyfluoride Fluorine resins such as ethylene propylene, tetrafluoroethylene-perfluoroalkoxyethylene copolymer, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polytrifluoroethylene chloride, fluororubber, silicone resin, silicone rubber As other silicon resins, methacrylic acid-styrene copolymer, polybutylene, methyl methacrylate-butadiene-styrene copolymer, and the like can be used.

On the other hand, the microcapsules 6 are fixed to the element substrate 4 on the pixel electrodes 8 by, for example, a double-sided adhesive sheet 25. This double-sided adhesive sheet 25 is a rubber-based or acrylic-based adhesive having a thickness of about 25 μm, and is fixed on the pixel electrode 8 of the element substrate 4 and fixed to the microcapsule 6. Thus, the microcapsule 6 is held and fixed on the element substrate 4. In addition, you may make it adhere | attach using the said binder 24 also about this element substrate 4 side, without using such a double-sided adhesive sheet 25. FIG.
With such a configuration, the microcapsule 6 is sandwiched between the element substrate 4 and the transparent substrate 5 to constitute the display panel 2.

Further, the display device 1 is provided with a control unit (not shown) for supplying drive signals to the scanning lines and data lines described above, and display data is input to the control unit or stored in advance in a memory. Display is performed based on display data stored in (not shown). That is, it has a normal display function provided in a general display device.
Here, the display method by the display device 1 will be described. The display device 1 changes the direction of the voltage (electric field) applied between the pixel electrode 8 and the common electrode 23 to change the electric power in the microcapsule 6. The migrating particles are collected on a desired electrode side, thereby performing a desired display.

  That is, as described above, for example, two types of electrophoretic particles, white and black, are used, and one particle, for example, a white particle is negatively charged, and the other black particle is positively charged. deep. Then, when performing display, by inputting a signal to a desired pixel electrode 8, the transparent substrate 5 side (common electrode 23 side) serving as a display surface is relatively negative with respect to the pixel electrode 8 side. An electric field is applied so that a voltage is applied. Then, black particles migrate to the transparent substrate 5 side and white particles migrate to the element substrate 4 side. Accordingly, a portion that substantially displays characters and the like is displayed on the transparent substrate 5 side by black particles, and a background portion thereof is displayed on the transparent substrate 5 side by white particles, so that a desired display can be obtained. Made.

  An electrophoretic element including an electrophoretic dispersion liquid in which such electrophoretic particles are dispersed has display retention. That is, once a desired display is performed, the electrophoretic particles are maintained as they are even when the power is turned off and the voltage applied between the pixel electrode 8 and the common electrode 23 is made zero. The display state when is entered is retained. Further, by turning on the power again and newly inputting display data, the held display can be canceled and a new display can be performed.

  In addition, the display device 1 may have a battery as a power source, for example, but in addition to or instead of this, an electromagnetic induction antenna is provided around the display panel 2 as shown in FIG. 60 may be provided. The electromagnetic induction antenna 60 is an antenna for an RFID (Radio Frequency Identification) system, functions as a power receiving antenna, and further functions as a data receiving antenna as necessary.

  That is, this electromagnetic induction antenna 60 functions as a power source for the display device 1 by generating induction power by electromagnetic induction when a magnetic signal is input from, for example, a separately prepared reader / writer. . Further, when functioning as an antenna for data reception, when a magnetic signal is input from a reader / writer and induced power as data is generated, this is input to the control unit or memory, and the display panel 2 Display is performed based on this input signal.

  In addition, the writing pen 3 in the display device 1 functions as writing means that enables writing on the display panel 2 as described above, and is different from the normal display function described above. It is for demonstrating. As shown in the schematic configuration diagram of FIG. 5A and the circuit diagram of FIG. 5B, the writing pen 3 includes a power source 71 made of a battery or the like and an oscillator ( (Oscillator) 72, a capacitor 73 and an electromagnetic induction coil 74 connected to the oscillator 72, and an output unit 76 including an iron core 75 inserted into the electromagnetic induction coil 74. .

  The writing pen 3 having such a configuration electromagnetically induces an electric signal oscillated from, for example, 13.56 MHz from the oscillator 72 by the electromagnetic induction coil 74 and generates a magnetic field, thereby generating the magnetic signal (magnetic flux) as the iron core 75. Is output from The capacitor 73 inputs an electric signal from the oscillator 72 to the electromagnetic induction coil 74 for use.

  In order to perform writing on the display panel 2 using such a writing pen 3, for example, an electrical signal is output from the control unit to the scanning line 50 or the data line 51 by using the above-described normal display function. A desired display is performed through the element 7. Then, the power is turned off in that state, and the display is held by the display holding property. Under such a state, an underline, a memo or the like is written on the display panel 2 by the writing pen 3.

  Then, the display panel 2 receives a magnetic signal as a write signal from the iron core 75 of the writing pen 3 at a writing location, and the sensor coil 19 (see FIG. 3) provided in the pixel 53 (or pixel group 54) serving as the writing location. ) Enter this. When the magnetic signal is input in this manner, the sensor coil 19 generates inductive power by electromagnetic induction, and further resonates with the resonance circuit 20 including the capacitor 22, thereby causing a predetermined current to flow to the rectifier circuit 21 (rectifier element 21a). It leads.

  Then, the rectifier circuit 21 (rectifier element 21a) rectifies this current and passes it to the pixel electrode 8 corresponding to the pixel 53 (or the pixel group 54), thereby providing a predetermined gap between the pixel electrode 8 and the common electrode 23. Apply a voltage of. Thereby, black particles out of the migrating particles in the microcapsule 6 migrate to the transparent substrate 5 side (common electrode 23 side) and white particles migrate to the element substrate 4 side (pixel electrode 8). Therefore, the portion (pixel 53 or pixel group 54) written by the writing pen 3 is substantially black for display, and the portion not written by the writing pen 3 (pixel 53) is displayed with a normal display function. And remain held. As a result, the display device 1 of the present embodiment can perform writing on the display surface in the display state by directly writing on the display panel 2 with the writing pen 3 under the display state. it can.

  As described above, in the display device 1 according to the present embodiment, induced power is generated in the sensor coil 19 by electromagnetic induction by the writing pen 3, and this induced power is rectified by the rectifying element 21 a and applied to the display panel 2. By doing so, it is possible to perform writing on the display surface which is in the display state by the normal display function, by the writing display function. Therefore, when this display device 1 is used as electronic paper, writing such as underlining or adding a memo from the display surface can be performed in a state where display is performed by a normal display function. This makes it very convenient to use.

Further, the display panel 2 is provided with an electromagnetic induction antenna 60, and the electromagnetic induction antenna 60 is configured to generate an induction power by inputting a magnetic signal from the outside, thereby exhibiting the display function. The power supply by can be made unnecessary. Therefore, the thickness of the entire apparatus can be further reduced, and flexibility and the like can be exhibited better as electronic paper.
If the display data can be input from the outside by the electromagnetic induction antenna 60, the apparatus configuration can be further simplified and the function as electronic paper can be further enhanced.

  In the writing pen 3 as writing means, an oscillator 72 oscillates to output a magnetic signal (magnetic flux) from the electromagnetic induction coil 74 as a writing signal, and the writing signal is input to the display surface of the display panel 2. Thus, under the state where the display is performed by the normal display function as described above, it is possible to perform writing such as underlining or adding a note from the display surface. Therefore, usability of the display panel 2 (display device 1) as electronic paper can be improved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, as shown in an equivalent circuit diagram of the display panel 2 shown in FIG. 6, the resonance circuit 20 may be connected to a wiring 55 connected to a power supply circuit via a rectifying element 21b. With this configuration, power can be supplied to the power source by the writing pen 3, and thus a power source such as a battery can be eliminated.

  Moreover, in the said embodiment, although the display element which comprises this as an example of the display apparatus of the present invention is an electrophoretic element, a display other than the electrophoretic element is particularly provided as long as it has display retention. The present invention can also be applied to a display device using an element. For example, a display device composed of a liquid crystal element using cholesteric liquid crystal, a display device composed of an electrochromic element using oxidation-reduction reaction, and an element that performs display by reversing particles having two different colors. The present invention can also be applied to a display device or the like.

It is a schematic block diagram of the display apparatus of this invention. It is principal part side sectional drawing of a display panel. It is an equivalent circuit diagram of a display panel. It is a top view which shows typically the formation position of a sensor coil. (A) is a schematic block diagram of a writing pen, (b) is a circuit diagram. It is an equivalent circuit diagram of a display panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Display panel, 3 ... Writing pen (writing means), 4 ... Element substrate (active matrix substrate), 5 ... Transparent substrate, 6 ... Microcapsule, 7 ... Drive element, 8 ... Pixel electrode, 19 DESCRIPTION OF SYMBOLS ... Sensor coil, 20 ... Resonance circuit, 21 ... Rectifier circuit, 21a ... Rectifier element, 23 ... Common electrode, 51 ... Data line, 53 ... Pixel, 54 ... Pixel group, 60 ... Antenna for electromagnetic induction, 71 ... Battery (power supply) , 72 ... Oscillator, 73 ... Capacitor, 74 ... Electromagnetic induction coil, 76 ... Output section

Claims (12)

A display device comprising a plurality of pixels,
Each of the plurality of pixels is
A first display function in which a display state is set based on a data signal supplied via one data line of the plurality of data lines;
A second display function in which a display state is set based on an input signal to the display surface of the display device from the outside of the display device;
A display device. The display device according to claim 1,
The second display function uses electromagnetic induction by the input signal;
A display device. A display device comprising a plurality of pixels,
Including a sensor coil comprising an electromagnetic induction coil corresponding to each of the plurality of pixels;
A display device. A display device comprising a plurality of pixels,
The plurality of pixels includes a plurality of pixel groups,
Including a sensor coil comprising an electromagnetic induction coil corresponding to each of the plurality of pixel groups;
A display device. The display device according to claim 3,
Corresponding to each of the plurality of pixels, a rectifying element for rectifying the induced power generated in the sensor coil is further provided.
A display device. The display device according to any one of claims 3 to 5,
The sensor coil generates inductive power by electromagnetic induction of an input signal from the outside of the display device;
A display device. The display device according to any one of claims 3 to 6,
further,
Equipped with an electromagnetic induction antenna,
The electromagnetic induction antenna receives an input signal from outside the display device;
A display device. The display device according to any one of claims 3 to 7,
Each of the plurality of pixels is
Having an electrophoretic element as a display element;
A display device. An input device for inputting to the display device from the outside,
Power supply,
An oscillator,
Having an electromagnetic induction coil,
An input device characterized by. The input device according to claim 9, wherein
By the output signal of the input device,
The display device generates inductive power by electromagnetic induction;
An input device characterized by. The input device according to claim 9 or 10,
By the output signal of the input signal,
Inductive power is generated by electromagnetic induction in each of the plurality of pixels included in the display device,
An input device characterized by. A display device according to any one of claims 1 to 8,
A display system comprising: the input device according to claim 9.

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