JP3368810B2 - I / O device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a handy terminal.
Equipment, portable information and communication equipment, or copiers and fax machines.
OA equipment such as millimeters and printers, and personal computers
Information processing equipment such as computers and word processors
I / O devices that can be widely used in electronic devices such as
Without using a power supply circuit or processing circuit, especially when
The present invention relates to an input / output device capable of displaying input / output. [0002] 2. Description of the Related Art Conventionally, this kind of handy terminal equipment and portable
Electronic devices such as digital information communication devices, or copiers,
OA equipment such as facsimile and printer, and personal computers
Widely used for null computers, word processors, etc.
Input / output devices that can be
An input device such as a touch panel is stacked on the upper surface of the output device
And display information and input information.
Such a configuration is known. [0003] As a technology relating to such an input / output device,
Is disclosed, for example, in Japanese Utility Model Application Laid-Open No. Sho 62-139025,
JP-A-3-124542, JP-A-6-332602
And JP-A-63-247819.
Have already been proposed. [0004] The Japanese Utility Model Application Laid-Open No. Sho 62-139025 relates to
The operation panel switch is a multi-operation panel
Switch for the dot matrix liquid crystal display
A membrane switch with multiple transparent electrodes on the top
It is configured to be arranged. Further, Japanese Utility Model Laid-Open No. 3-124542 described above.
Switch mechanism using a liquid crystal display panel according to
Switch mechanism to control various functions of the container
Display symbols that represent the various functions of the electronic device.
LCD panel and symbol groups for multiple screens
And a memory unit provided on the front of the liquid crystal panel.
Switch to the function corresponding to the displayed symbol group.
Switch between the transparent pressure sensor and the function of this pressure sensor
Interface unit, and the back of the liquid crystal display panel
And a backlight for irradiating from
Things. Further, Japanese Patent Application Laid-Open No. 6-332602 is disclosed.
The information processing device related to the information is a liquid crystal display that displays various information.
Display and a liquid crystal display
A pressure-sensitive touch panel and an appropriate display on the liquid crystal display
Is displayed, and when displayed, the coordinate position entered on the display
Software that receives the position from the pressure-sensitive touch panel
Keyboard and the software keyboard
Software keyboard that can be put on and taken off
Key button-shaped projections on the top
Key on the surface of the projection.
-Characters that match the character array are displayed by printing, etc.
It is configured to have a keyboard input assistant
It is. On the other hand, Japanese Patent Laid-Open No. 63-247819
The touch panel input / output device related to the information
A display device whose display screen is configured as a set of areas,
Matrix-like digital data provided on the screen
One touch switch that detects one coordinate
Is almost the same as the character area
Equal and the display pitch of the character area of the display device
And the detection pin of the partitioned area of the digital touch switch.
Digital touch switch with approximately equal switches
In a touch panel input / output device, the display device
The area of the digital touch switch with respect to the
The image area is not halved in each of the X and Y directions.
It is configured to be arranged in an overlapping manner. FIG. 20 shows various techniques proposed as described above.
Of the conventional copier control panel
FIG. 21 is a sectional view showing the structure, and FIG. 21 is an exploded view of the same. Such obedience
In the conventional structure, the information input display 100
Is a transmission type liquid formed by laminating glass sheets.
Crystal display screen 121, and superimposed on this display screen 121.
And a touch panel 122 to be placed.
The panel plate 124 having the mouth 123 is the information input
It covers the spray 100. The above liquid crystal display
The screen 121 is transparent on opposite surfaces of a pair of glass substrates.
In addition to crossing the ITO electrode that will be the electrode
The liquid crystal is sandwiched between the pair of glass substrates.
In a matrix state on a pair of glass substrates.
The formed ITO electrode is powered by the CPU circuit for display.
Configured to display an image by applying pressure
Have been. The touch panel 122 includes two touch panels.
At a predetermined pitch (for example, 4 mm pitch) on a glass substrate
Formed a matrix of transparent conductive thin film such as ITO
Later, these glass substrates are bonded together with a slight gap.
And any position of the touch panel 122
When they are pressed, they are opposed to each other by the pressing force
The conductive thin film contacts locally to cause electrical continuity,
CPU circuit 125 touches based on signal level change
It is configured to specify the pressing position on the panel 122
I have. In FIG. 21, reference numeral 126 denotes the liquid crystal display.
A fluorescent lamp for illuminating the screen 121 from behind, and a numeral 127 denotes a fluorescent lamp
Light emitted from the light lamp 126 is diffused over the entire surface of the liquid crystal display screen 121.
A light diffusion plate 128 for turning on the fluorescent lamp 126
It is an inverter circuit to be performed. [0010] Such a conventional information input display 1
In 00, virtual operation according to the function used by the device
Button is displayed on the LCD screen 121, and
The user can touch the touch panel 1
22 and press the virtual operation button from above.
With the pressed position on the touch panel 122 and the virtual operation button
The virtual operation button is pressed from the relationship with the display position of
You can check if it has been done. Therefore, heel
Conventional control panel with an information input display
In the panel, the display contents of the liquid crystal display screen 121
By changing each function, multiple virtual operation buttons
Since you can assign a number of functions,
Significant reduction in the number of physical operation buttons on the panel
Can be done. Further, the touch panel 22
It has already been proposed to use
ing. [0011] However, the above prior arts
In the case of (1), there are the following problems. Sand
That is, the input and output of the conventional information input display 100 and the like.
In the device, for example, an input
Information input by the input device from the liquid crystal display screen 121 etc.
In order to display on an output device, the touch panel 122
The information input from the input device such as
The pressed position on the touch panel 122 is detected by
The information on the pressed position of the touch panel 122 is
Through the processing circuit that does not
It is necessary to output and display on the lix electrode. for that reason,
Input / output device such as the above-mentioned conventional information input display 100
In order to input and display information,
A signal processing circuit including a U circuit 125 and the like;
Power supply circuit for driving circuits and liquid crystal display screen 121
Is required. Therefore, the conventional information input disk described above is used.
In input / output devices such as the Play 100, a liquid crystal sheet
It is portable while using a thin type input / output integrated device.
Requires a separate power supply circuit, signal processing circuit, etc.
And add a memo to the display contents of the output device
It is said that the equipment becomes large for such applications
There was a problem. Therefore, the inventors of the present invention have used an input / output device.
Research on Input Reflection Method for Possible Display Devices
As a result of repeated studies, input contents are converted to power supply circuits, signal processing circuits, etc.
Find a way to reflect on the output without using
The invention has been reached. Accordingly, the object of the present invention is to
Inputs can be performed without using a power supply circuit or processing circuit during appending.
An object is to provide an input / output device capable of inputting / outputting contents. [0014] [Means for Solving the Problems] [0015] [0016] [0017] [0018]In the input / output device of the present invention,To the applied electric field
Display that changes the display state of a flexible display screen based on
Means, and a display screen provided below the display screen.
By pressing from the viewing side, the display screen corresponding to the pressing
Generating means for generating an electric field as the applied electric field at a position,
In response to the pressing based on the electric field generated by the generating means,
Detecting means for detecting a corresponding position on the display screen.
Things. [0019] [0020] [0021] [0022] [0023]In the input / output device of the present invention,
In addition to the configuration, The generating means and the detecting means
Striped piezoelectric element sandwiching ip-shaped resistive film electrodes
Are arranged in a matrix, and based on the output of the resistive film electrode,
And detecting the position, wherein the display means comprises:
A sheet-like display element laminated on the piezoelectric element, and display
Light transmissivity that is grounded on the viewing side of the screen at least during additional writing
And a transparent electrode. With such a configuration
Position corresponding to writing (pressing) via the display element
While the piezoelectric element of the flexure generates an electric field in the display element,
The position can be detected relatively accurately from the electrodes on both sides.
It is possible, and the generation means and the detection means are integrated
be able to. An input / output device according to a third aspect of the present invention (claim 9
Invention) displays a flexible display screen based on an applied voltage.
Display means for changing a state, provided below the display screen
Is pressed from the viewing side of the display screen.
An electric field is generated at the corresponding display screen position as the applied electric field.
Generating means that responds to the pressure based on the pressure
Detection means for detecting the position on the display screen
Things. With such a configuration, the first and second inventions
As with, display means without power supply or special processing means
Can be added to, and added and displayed with good visibility
And display means and display means
Position on the display screen corresponding to the pressing through the generation means
Since the position is detected, the input information can be extracted.
As a result, information is displayed on the display means based on the extracted input information.
Information can be displayed. Therefore, appending (direct table
Not only re-display) but also recognition of handwritten documents
And convert it to pattern information and display it as a normal electronic document.
It is also possible to show. In addition, the detection means also
Existing touch panel
Visibility is better than when it is placed on a display screen like
And use a transparent electrode as the detection means.
Relatively simple membrane because there is no need to
Switch can be used to reduce costs
You. Preferably, said generating means is grounded
An electrode layer and one or more sheets laminated on the electrode layer
Wherein the display means comprises:
A sheet-like display element laminated on the piezoelectric element,
At least the light-transmitting ground that is grounded at the time of
And a transient transparent electrode. In such a configuration
Further, the configuration can be further simplified. Preferably, in the second and third inventions
The transparent electrode on the viewing side of the display screen is connected to the output of the detecting means.
Information based on force is given, and a horizontal electric field is generated based on the information.
The information is displayed on the display screen. This
With such a configuration, display elements such as liquid crystal display elements
Advantageously, additional writing can be performed. Preferably, in the second and third inventions
The display means is transparent to the transparent electrode on the viewing side.
Transient emissive electrodes, these transparent electrodes
Information based on the output of the means is provided, and the information is provided between the transparent electrodes.
Information on the display screen by generating a vertical electric field based on the
Things. With such a configuration, the type of display element
Can be realized without restriction. Preferably, in the first to third inventions
A storage table in which the display means stores display information.
Element. For example, a spherical rotating display element (U.S. Pat.
Specification 4143103) or a ferroelectric liquid crystal display element.
Which memory type liquid crystal display device etc.
You. [0030] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explanation will be made based on the state. Embodiment 1 FIG. 1 shows an embodiment of an input / output device according to the present invention.
Things. The input / output device 1 according to the first embodiment is
As shown in FIG. 1, the liquid as a display element can be roughly divided.
Crystal display panel 2 and a sheet-shaped
And a piezoelectric element 3. The liquid crystal display panel 2 has a reflective liquid crystal display.
Display panel, and is formed into a sheet having flexibility.
ing. This liquid crystal display panel 2 is shown in FIGS.
As described above, the pair of polarizing plates 2
1 and 21 are arranged.
The light plates 21 and 21 are directly laminated on the liquid crystal display unit 20.
It is not necessary to use a pair of polarizing plates 21 and 21 and the liquid crystal display unit 2.
Another layer or a plate-like member may be interposed between 0 and 0. this
The liquid crystal display section 20 of the liquid crystal display panel 2 is shown in FIG.
As shown, a pair of PES (polyether sulfone)
The liquid crystal 23 is laminated between the sheets 22 and 22 of FIG.
Have been. In addition, outside the pair of PES sheets 22, 22
, Polarizing plates 21 and 21 are arranged. The pair of
As the liquid crystal 23 laminated between the PES sheets 22, 22,
For example, a ferroelectric polymer liquid crystal is used.
However, the present invention is not limited to this.
Of course, it is good. The liquid crystal display section 20 of the liquid crystal display panel 2 and
For example, the basic configuration and operation are described in Japanese Patent No. 251
Structured as disclosed in Japanese Patent Publication No. 2290
Is used. More specifically, Idemitsu Kosan Co., Ltd.
JP-A-5-61061 and JP-A-5-5-2 according to the application
No. 73531, etc.
Can be used. However, this LCD panel
In the liquid crystal display section 20 of FIG.
It is not necessary to deposit an ITO electrode to be a transparent electrode on 2
And one or both of the pair of PES sheets 22,
Film formation by applying liquid crystal 23 made of ferroelectric polymer liquid crystal
And a pair of facing PES sheets 22, 22 are laminated.
After passing through multiple rollers,
It is manufactured by subjecting to an orientation treatment by rubbing. Where ferroelectric
Liquid crystal display panel using liquid crystal 23 composed of conductive polymer liquid crystal
2 has a memory property, so the application of voltage is stopped.
Has the characteristic that the display screen can be held even when
are doing. The front side of the liquid crystal display panel 2 is
On the viewing side, between the PES sheet 22 and the polarizing plate 21
To prevent the liquid crystal display panel 2 from being irregularly reflected.
Layer 2 made of a visibility improving sheet for improving the quality
4 are arranged in a stacked state. This visibility improvement sheet
As the buffer layer 24 made of, for example, a gel resin
Alternatively, a resin made of rubber-like resin is used. This viewing
An electric field is applied to the surface of the buffer layer 24 made of the property improving sheet.
Display image based on the change in optical anisotropy of the obtained liquid crystal
In order to clarify the contrast of the light,
Have been. At this time, the liquid crystal display unit 20 having flexibility is partially biased.
The buffer layer 24 interposed between the light plate 21 and other members
If the refractive index is significantly different, external light will be reflected.
In addition, the display quality of the liquid crystal display panel 2 deteriorates. That
As the buffer layer 24 made of the visibility improving sheet,
Means that the refractive index of air is 1.0,
The refractive index of the synthetic resin constituting the liquid crystal 23 and the polarizing plate 21 is
Since it is around 1.4, the gel-like resin of the transparent buffer layer 24
Alternatively, a rubber-like resin having a refractive index of around 1.4 is used.
Is best. For example, Nittoden
The visibility improving sheet made by Koko has a refractive index of 1.46.
Therefore, for example, the buffer layer 24 has a thickness of 400 μm.
Adhesive Nitto Denko's visibility improving sheet is used
The visibility improving sheet 24 is provided on the liquid crystal display panel 2.
And the polarizing plate 21 are adhered and held by the adhesiveness.
It is interposed in the state that was put. Used as the buffer layer 24
The visibility improving sheet is, for example, an acrylic polymer or the like.
Gel-like resin or rubber-like resin such as silicone resin
What consists of resin is used. On the back side of the liquid crystal display unit 20,
The polarizing plate 21 is directly stacked without any member
The polarizing plate 21 on the back side is a liquid crystal display.
Orthogonal to the polarizing plate 21 disposed on the front side of the display panel 2
Are arranged as follows. Further, the liquid crystal display panel 2
The lower part of the polarizing plate 21 arranged on the back side of the
The light incident from the front side of the liquid crystal display panel 2
Reflective plates 25 are stacked. This reflection plate 25
As, for example, a reflective material made of synthetic resin is used.
You. Further, on the back side of the liquid crystal display panel 2,
Is a sheet-like piezoelectric element 3 as shown in FIGS.
However, two layers are laminated to improve sensitivity
Have been. Here, the sheet-shaped piezoelectric element 3
For example, from PVDF (polyvinylidene fluoride)
Sheet is used. In addition, the above two
Among the sheet-like piezoelectric elements 3, a sheet-like pressure located below
A thin-film electrode made of aluminum or the like
4 is deposited by means such as vapor deposition.
The potential of the electrode 4 is fixed, for example, by being grounded.
Have been. In the above configuration, the first embodiment
In such an input / output device, a power supply circuit and processing
Input contents can be displayed without using a circuit
I have. That is, the input and output according to the first embodiment
In the device 1, as shown in FIG.
Using a stylus pen 5 fixed to the ground potential from the surface,
By entering information such as characters and figures, you can enter information.
Do the force. In addition, the stylus pen 5 is renewed.
It does not need to be connected to earth;
Of course, it is also good to fix to the position. In addition, the style
For example, the tip of the raspen 5 that contacts the display element 2 is
A tip made of a metal material and made of this metal material
What is necessary is just to comprise so that a human finger etc. may contact every minute. By the way, as described above, the surface of the display element
Using a stylus pen 5 fixed to ground potential from
After entering information such as characters and figures, press the stylus pen 5
The pressed position is the position of the indicated element as shown in FIG.
Sheet-like piezoelectric element 3 arranged in a stacked state on the back side
Are deformed downwardly with the display element 2. Do
FIG. 4 shows the deformed sheet-shaped piezoelectric element 3.
So that it is inversely proportional to the radius of curvature R of the deformed part.
Since a charge based on the polarization P is generated in the
Of the stylus pen 5 fixed to the ground potential
An electric field is formed between them. As a result, the LCD panel
The display element composed of the device 2 is strong only in the portion where the electric field is applied.
Since the alignment state of the dielectric liquid crystal 23 changes, this liquid crystal display
Panel 2 displays the trajectory entered with stylus pen 5
Image information is displayed. The ferroelectric polymer liquid
Crystal 23 has a memory property as described above.
Therefore, the deformation of the sheet-shaped piezoelectric element 3 returns to its original state, and an electric field is applied.
Even when the stylus pen 5 is no longer
I can continue to display the entered information
I have. As described above, the entry / exit according to the first embodiment is performed.
Power devices, without the use of power and processing circuits,
From the surface of the liquid crystal display panel 2 by the stylus pen 5
By simply entering the desired information, the liquid crystal display panel 2
It is possible to display the input contents. The image displayed on the liquid crystal display panel 2
To erase information, an erasing circuit (not shown)
An inverted electric field may be applied to the liquid crystal display panel 2. Embodiment 2 FIG. 5 shows a second embodiment of the present invention.
In Embodiment 2, the display element is not a liquid crystal display panel.
And disclosed in JP-A-3-188489.
Like, twisting ball panel display
Use an addressable display device called
Is configured. According to this Japanese Patent Application Laid-Open No. 3-188489,
Addressable display devices include paper-like sheets
Wherein the paper-like sheet comprises a plurality of substantially spherical balls.
Having a translucent main body layer loaded therein, each of said balls being a control
At least two different planes of color and different surface charges
Wherein each said ball is substantially a sphere filled with a dielectric liquid
The paper is housed in a cavity and is free to rotate.
Movable relative to the sheet, and
By rotating the ball, information is placed on the paper-like sheet.
Having a chargeable electrode means for making the information visible.
It comprises dress means. More specifically, this addressable
A display sheet 30 constituting a display device
Is composed of only the main layer 31 as shown in FIG.
This seat has a small rotatable inside the internal cavity 32.
Ball 33 is loaded, and this seat
Protective upper and lower layers 34 to provide strong mechanical properties
Is provided. Alternatively, protect only the upper layers,
Alternatively, the sheet may be completely stored in the protective sheath. Up
The main body layer 31 has a thickness of about 0.127 to 0.508 mm.
It is made of sheet-like elastomer such as silicone rubber.
Inside, each having a high density of about 15 to 30 μm in diameter.
Electric balls 33 are dispersed. Each ball 33
Each hemisphere is a control color, preferably one is white and the other is black
And have different surface charges in the electric field
Swelling. Each ball 33 is housed in a spherical cavity 32.
The space between the ball 33 and the cavity 32 is
The body is full and the ball 33 can rotate freely.
ing. The display sheet 30 has a predetermined pole.
When an electric field of a potential higher than the threshold is applied,
The balls 33 are aligned and their black faces are all one
Turn around. Viewing from this direction, display sheet 3
0 looks black. Conversely, the polarity of the electric field is reversed.
Then, the ball 33 is rotated 180 ° and the white surface becomes
The display looks white, facing the viewing direction. Also,
Display sheet 30 can store non-volatile images
It is. That is, as long as the electric field does not change,
Turns are held indefinitely. Even if strong vibration is applied
The rule orientation does not change. The display according to the second embodiment
In the case of the gate 30, unlike a liquid crystal display panel, a deflecting plate
Because it is not necessary to use
The stylus pen 5 can be formed thinly.
The pressing force can be transmitted to the piezoelectric element 3 more effectively.
Make additional writing with the stylus pen 5 more reliably
be able to. Embodiment 3 FIG. 6 shows a third embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and described.
Then, in the third embodiment, the stylus pen is grounded.
There is no need to fix to the potential, and information can be entered freely
It is configured as follows. That is, the input / output according to the third embodiment
As shown in FIG. 6, the device 1 has a transparent surface on the display element 2.
The electrode 7 is formed uniformly, and this transparent electrode 7 is
Connected to ground and fixed to ground potential.
You. As the transparent electrode 7, for example, ITO (Int)
ium Tin Oxide)
However, transparent electrodes made of other materials may be used.
Of course. Note that this transparent electrode 7 is
The pressing force at the time of writing with the button 5 is efficiently transmitted to the piezoelectric element.
It is desirable to make it as thin as possible
No. By doing so, the stylus pen 5
It is not necessary to fix it to the ground potential,
However, the same effect as that of the embodiment described with reference to FIG.
Is out. Therefore, the entry and exit configured as described above
The types and characteristics of writing instruments for writing information in the force device 1
Any writing instrument, not limited to the Tylus pen 5
Can be used. The transparent electrode 7
The potential is, of course, not limited to the ground potential.
What is necessary is just to be fixed to a constant potential. Embodiment 4 FIG. 7 shows a fourth embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and described.
Then, in the third embodiment, the display element is simply
Not only can you automatically enter information, but the information you enter
Can be extracted as an electric signal. FIG. 7 is a diagram showing an ingress / egress according to the fourth embodiment of the present invention.
3 shows a force device. The implementation of thisForm 4The input / output device 1 according to
As shown in FIG. 7, a resistance film 8 is provided on the back side of the piezoelectric element 3.
And the resistance film 8 in the vertical and horizontal directions.
As shown in FIG. 8, coordinate position information is extracted from the side.
Are configured to provide extraction electrodes 9a and 9b.
You. The input / output device 1 has two sheets.
Thin film electrode made of aluminum or the like between the piezoelectric elements 3
4 are provided, and the upper sheet-like piezoelectric element 3 is displayed.
For this purpose, the lower sheet-like piezoelectric element 3
Used to take out each
You. Then, the above implementationForm 4Input / output equipment according to
The device 1 is provided by a stylus pen 5 from the surface of the transparent electrode.
By filling in the information, the same as in the second embodiment
Display information and set extraction electrodes 9a and 9b.
By pressing the stylus pen 5
As shown in FIG. 8, the charges generated in the vertical and horizontal directions are
Reading the position under pressure by detecting
Can be done. This allows you to
It is possible to take out input information as electrical signals
And the electric information is transmitted to the display element 2.
Can be displayed automatically. To further explain, according to the fourth embodiment.
The input / output device 1 acquires coordinate position information as shown in FIG.
The detecting means for ejecting is a lower second sheet-like piezoelectric element.
Extraction electrodes 9a and 9b are provided under the element 3 at the four corners.
And a resistance film layer 8. With such a configuration, for example,
Pull-down resistors (R4 and R4) are connected to the extraction electrodes 9a and 9b at the four corners.
), And the resistance value of the pull-down resistor R4 and the above
The charge generation position of the second sheet-like piezoelectric element 3 (the voltage V
Length from the position where the corresponding charge is generated) to the electrode of the resistive film
Depending on the relationship between the resistance value and the ratio (R1: R2),
プ ル ダ ウ ン V / (R2 +
R4)｝ × R4 = VR2 and {V / (R1 + R4)} ×
The difference (VR2-VR1) from R4 = VR1 was differentially amplified.
Since the position in the X direction and the Y direction can be specified by the value, the ratio
Display image corresponding to writing (pressing) with relatively simple configuration
The position on the surface can be easily detected. Embodiment 5 FIG. 10 shows a fifth embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and explained.
For clarity, in the fourth embodiment shown in FIG.
A detection means is provided separately from the slave to detect the input location in analog.
However, in the fifth embodiment, the piezoelectric element
Provide detection means on the body to detect input information digitally
It is configured as follows. FIG. 10 shows an input according to the fifth embodiment of the present invention.
3 shows an output device. Input / output device 10 according to the fifth embodiment
Are roughly divided into display elements as shown in FIG.
Liquid crystal display panel 2 and a display
Function to display information on the device and input information
And input means 11 and 12 having
The liquid crystal display panel 2 has the same configuration as that of the first embodiment.
Has been established. The input means is shown in FIGS. 10 and 11.
Thus, the input element 11 of the first layer and the input element 12 of the second layer
Are stacked in two layers. Input element 1 of the first layer
The input elements 12 of the first and second layers are shown in FIGS.
As described above, the piezoelectric element 13 formed linearly and
It is configured by alternately arranging the resistance layers 14 in a stripe shape,
The piezoelectric element 13 and the resistance layer 14 cross each other.
Are arranged in a stacked state. The above piezoelectric element 13
Is formed of, for example, PVDF or the like.
4 is formed by ITO or the like. In addition, the first layer
Input element 11 and the resistance layer 14 of the second-layer input element 12
Are intersected by the insulating layer 15 partially or entirely.
The input element 11 of the first layer and the input of the second layer are interposed.
The electric charge flowing through each resistance layer 14 of the force element 12
So that it does not flow into the resistance layer 14.
You. The input element 11 of the first layer and the second
As shown in FIG. 13, the input element 12 of each layer
4 are individually operated via electronic scanning circuits 16 and 17.
It can be connected to a differential circuit consisting of an amplifier.
The output from each resistance layer of the input element of the layer and the input element of the second layer
The forces are such that their differences are detected by the difference circuit
It has become. In the above configuration, the fifth embodiment
In such an input / output device, a power supply circuit is provided as follows.
Outputs input contents without using any processing circuit
It is possible to display
It is possible to input the information. That is, the input / output according to the fifth embodiment
In the device 10, as described above, the liquid crystal display panel
Write desired information on the surface of 2 using stylus pen 5
By pressing the stylus pen 5
1st layer input element 11 and 2nd layer input element 12
Each of the piezoelectric elements 13 has a convex shape as shown in FIG.
It deforms into a shape and generates electric charges. At this time, each of the above piezoelectric elements
13, the resistance layer 14 is adjacent to the resistance layer 14 as shown in FIG.
Grounded via resistors R, R connected to
The voltage generated on the piezoelectric element 13 at the pressed position
The load is between the transparent electrode 7 laminated on the surface of the display element 2.
To generate an electric field. As a result, the stylus pen 5
Of the liquid crystal display panel 2 corresponding to the position pressed
23 indicates that the alignment state changes and the optical anisotropy is changed to other parts.
Is different from the trajectory pressed by the stylus pen 5.
The image is displayed. On the other hand, the input element 11 of the first layer and the input element 11 of the second layer
As shown in FIG. 13, the input element 12 emits light to each piezoelectric element.
The generated charges pass through the adjacent resistive layer and
Are switched by the paths 16 and 17 and the differential circuit 1
8 and the input of the first layer by the difference circuit 18
The output of the resistance layer 14 of the element 11 and the input element 12 of the second layer
Of the resistance layer 14 is obtained. At this time, the input element 11 of the first layer and the second
The pressed position of the input element 12 of the layer is shown in FIG.
If it is point A shown in FIG.
From the input element 11 and the resistance layer 14 of the second-layer input element 12
Is applied to each piezoelectric element as shown in FIG.
A voltage V corresponding to the same polarization charge is output.
You. Therefore, for example, each resistance layer of the first input element 11
14, the resistance layer 14 of the second input element 12
As the output is sequentially scanned, the pressing position of the stylus pen 5
No voltage is output from the resistance layer 14 that is not adjacent to the
Is the resistance adjacent to the position pressed by the stylus pen 5.
A voltage V is output from the layer 14. Yo
The input element 11 of the first layer and the input element 12 of the second layer
The difference between the voltages output from the resistance layers 14 of
When the scanning is performed sequentially, as shown in FIG.
The resistance layer 14 adjacent to the position pressed by the
On the other hand, since the output voltage is 2V, the stylus pen
It is possible to automatically input the information of the position pressed in 5
It works. As described above, in the fifth embodiment, the power supply
Outputs input contents without using circuits or processing circuits.
It is possible to display
Information can be input. As a result, each of the crossing portions is compressed.
It is a force detection part and the resistance on both sides of the place where pressure is applied
The film 14 functions as a readout electrode and connects it to the outside.
Input location can be detected externally.
You. The input information is automatically displayed on the display element 2
Of course. Embodiment 6 FIG. 16 shows a sixth embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and explained.
Specifically, in the sixth embodiment, a power supply circuit and a processing circuit
Output and display the input without using
Automatically captures arbitrary image information as well as possible
It can be displayed. That is, the input / output according to the sixth embodiment
In the device 10, as shown in FIG. 16, the liquid crystal display unit 2 is transparent.
ITO electrodes 26 and 26 as electrodes are provided.
The TO electrodes 26, 26 are formed by a pair of PES
(Polyethersulfone) sheets 22, 22,
It is deposited in a straight line. The pair of PES sheets 2
ITO electrodes 26, 26 deposited respectively on 2, 22
Are arranged linearly at a predetermined pitch so as to be orthogonal to each other.
The upper electrode 26 and the lower electrode 26 are mated.
To form a lip. Also, on the back side of the liquid crystal display panel 2,
Are the resistance film 8, the piezoelectric element 3, the thin film electrode 4, the piezoelectric element 3,
Are sequentially laminated. The pair of PES sheets
ITO electrodes 26, 26 deposited on 22, 22, respectively
Is connected to ground when writing with the stylus pen 5
And is maintained at ground potential.
With the electric charge generated in the piezoelectric element 3 due to the additional writing by the
An electric field is formed between them. FIG. 17 shows an input / output device configured as described above.
FIG. 3 is a block diagram illustrating a control circuit of the device 1; In FIG. 17, reference numeral 60 denotes the input / output device 10.
This shows a CPU for control.
0 is a liquid crystal display on both sides of the display screen based on the input information.
It is displayed on the liquid crystal display section 20 of the display panel 2. That is, C
The PU 60 displays the configuration data of the screen to be displayed (hereinafter, frame data).
Through the driver circuit 61 based on the
To perform drawing processing on each liquid crystal display unit 20
I have. Therefore, the input / output according to the sixth embodiment
In the device 10, a combination of a liquid crystal display panel and a piezoelectric element is used.
Power supply circuit and processing circuit
It is possible to output and display the input contents without
Needless to say, the liquid crystal display panel 2 is provided in a matrix.
A voltage is applied to the emitted ITO electrode 44 according to the image information.
Can automatically display any image information.
Noh. Embodiment 7 FIG. 18 shows a seventh embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and explained.
Specifically, in the seventh embodiment, the power supply circuit and the processing circuit
Output and display the input without using
Automatically captures arbitrary image information as well as possible
It is possible to display, but the image information provided on the display element
The arrangement of the information display electrodes is different from that of the sixth embodiment.
You. That is, the input / output according to the seventh embodiment
In the device 10, as shown in FIG. 18, the liquid crystal display unit 2 is transparent.
An ITO electrode 26 as an electrode is provided.
The electrodes include a pixel electrode 26a and a counter electrode 26b.
PES (polyether sulfo) on the front side for each fixed pixel
) Is vapor-deposited only on the sheet 22. Above surface side
Facing the pixel electrode 26a deposited on the PES sheet 22
An ITO electrode 26 composed of an electrode 26b and a T
Driven for each pixel by FT (thin film transistor)
It has become. The liquid crystal display element 2 is
Lateral electric field formed by the elementary electrode 26a and the counter electrode 26b
Is configured to display an image. this
As described above, by applying a horizontal electric field to the liquid crystal display element 2,
As a technique for displaying an image, for example, there is a technical document.
"NIKKEI MICRODEVICE" 1996
December, P134-P135
Can be used. Further, below the liquid crystal display panel 2,
The piezoelectric element 3 and the resistance film 8 are sequentially laminated. In addition,
The pair of PES sheets 22 are deposited on
The ITO electrodes 26a and 26b are traced with the stylus pen 5.
When writing, it is connected to ground and maintained at ground potential.
With additional writing with the stylus pen 5, etc.
So that an electric field is formed between the electric charges generated in the piezoelectric element 3 and
Has become. Therefore, the input / output according to the seventh embodiment
In the device 10, the combination of the liquid crystal display panel 2 and the piezoelectric element 3
By combining, without using a power supply circuit and processing circuit,
Of course, it is possible to output and display the input contents.
That any image information can be displayed automatically.
However, if a transparent electrode is provided only on one side of the liquid crystal display unit 20,
Therefore, the liquid crystal display panel 2 is formed thinner by that amount.
And the pressing force of the stylus pen 5 can be more effectively reduced.
Can be transmitted to the piezoelectric element 3 and can be transmitted to the stylus pen 5.
Additional writing can be performed more reliably. Embodiment 8 FIG. 19 shows an eighth embodiment of the present invention.
The same parts as those in the first embodiment are denoted by the same reference numerals and explained.
Specifically, in the eighth embodiment, a power supply circuit and a processing circuit
Output and display the input without using
Automatically captures arbitrary image information as well as possible
It can be displayed, but further input information
It is possible to take out as. That is, the input / output according to the eighth embodiment
As shown in FIG. 19, the device 10 includes two sheet-shaped piezoelectric members.
A membrane switch 70 is stacked on the back side of the element 3
Are located in This membrane switch 70 is
The electrode patterns 71 formed in a trix shape are vertically
Have a predetermined pitch along the direction and the lateral direction respectively
A pair of switch sheets 72, 72 and a pair of switches
The electrode patterns 7 are disposed between the
The area 74 corresponding to the first switch section 73 is circular or rectangular.
What consists of a spacer sheet 75 cut out in shape
Used. The membrane switch 70 is provided with a pen or a finger.
Switch sheets 72, 72 in the area pressed by
Thus, the pair of switch sheets 72, 72 are formed.
Switches 73 are pressed by contact with each other.
The one that detects the coordinates of the touched position is used (Patent No. 25
No. 56711). However, the above membrane switch 70
However, the present invention is not limited to this.
No. 5,668, JP-A-8-258147,
JP-A-8-241647 or Japanese Patent No. 25306
Use various things disclosed in No. 51, etc.
Can be of any type. [0082] As described in detail above,Of the present invention
For I / O devices, By pressing from the viewing side of the display screen,
The display means bends to transmit the pressing force to the generating means, and this
As a result, an electric field is generated at the position on the display screen corresponding to the pressing force.
Occurs. Display means based on the generated applied electric field
Is configured to change the display state of the display screen.
Add to the display means even if there is no power supply or special processing means
In other words, it can be displayed directly,
Anything that reduces visibility is placed on the indicating means.
Since it is not possible, it is possible to add and display with good visibility
Become. [0083]In the input / output device of the present invention,
In addition to the effects,Generated by the generating means by the detecting means
The position on the display screen corresponding to the pressing based on the electric field
Retrieving input information because it was configured to detect
Can be. As a result, a table is displayed based on the extracted input information.
The information can be displayed on the indicating means. Therefore,
Not just a re-display of the note (direct display), but also a handwritten document
Is converted to pattern information by recognition
It can also be displayed as a letter. [0084]Further, in the input / output device of the present invention,
In addition to the above configuration, the generating means and the detecting means
Striped piezoelectric element sandwiching ip-shaped resistive film electrodes
Are arranged in a matrix, and based on the output of the resistive film electrode,
And detecting the position, wherein the display means comprises:
A sheet-like display element laminated on the piezoelectric element, and display
Light transmissivity that is grounded on the viewing side of the screen at least during additional writing
And a transparent electrode. With such a configuration
Position corresponding to writing (pressing) via the display element
While the piezoelectric element of the flexure generates an electric field in the display element,
The position can be detected relatively accurately from the electrodes on both sides
It is possible, and the generation means and the detection means are integrated
be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of an input / output device according to the present invention. FIG. 2 is a cross-sectional configuration diagram illustrating an input / output device according to an embodiment of the present invention in further detail. FIG. 3 is an explanatory perspective view showing a use state of the input / output device according to Embodiment 1 of the present invention; FIG. 4 is a graph showing a relationship between a radius of curvature and polarization. FIG. 5 is a sectional configuration diagram showing an input / output device according to Embodiment 2 of the present invention. FIG. 6 is a cross-sectional configuration diagram showing an input / output device according to Embodiment 3 of the present invention. FIG. 7 is a sectional configuration diagram showing an input / output device according to Embodiment 4 of the present invention. FIG. 8 is a plan view showing a resistive film of the input / output device according to Embodiment 4 of the present invention. FIG. 9 is a perspective explanatory view showing a use state of the input / output device according to Embodiment 4 of the present invention. FIG. 10 is a sectional configuration diagram showing an input / output device according to Embodiment 5 of the present invention. FIG. 11 is a plan view showing first and second input elements of an input / output device according to Embodiment 5 of the present invention. FIG. 12 is an exploded perspective view showing an input / output device according to Embodiment 5 of the present invention. FIG. 13 is an exploded perspective view showing an input / output device according to Embodiment 5 of the present invention. FIG. 14 is a perspective explanatory view showing a use state of an input / output device according to Embodiment 5 of the present invention. FIGS. 15A and 15B are explanatory diagrams respectively showing a detection state of an input / output device according to Embodiment 5 of the present invention. FIG. 16 is a sectional configuration diagram showing an input / output device according to Embodiment 6 of the present invention. FIG. 17 is a block diagram showing a control circuit of the input / output device according to Embodiment 6 of the present invention. FIG. 18 is a sectional configuration diagram showing an input / output device according to Embodiment 7 of the present invention. FIG. 19 is a sectional configuration diagram showing an input / output device according to Embodiment 8 of the present invention. FIG. 20 is a cross-sectional view showing a specific structure of a control panel of a conventional copying machine. FIG. 21 is an exploded view of the same. [Description of Signs] 1 input / output device, 2 liquid crystal display panel, 21 polarizing plate,
22 PES sheet, 23 liquid crystal, 3 sheet-shaped piezoelectric elements, 4 thin-film electrodes.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-163133 (JP, A) JP-A-63-191124 (JP, A) JP-A-52-113633 (JP, A) 81296 (JP, A) JP-A-9-6525 (JP, A) JP-A-5-205570 (JP, A) JP-A 8-292408 (JP, A) JP-A-58-200384 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) G09F 9/00-9/46 G02F 1/1333 G06F 3/033

Claims (1)

(57) Claims 1. A flexible display screen based on an applied electric field.
A display means for changing a display state, and a display means provided below the display screen, the display side being a viewing side of the display screen.
Of the display screen corresponding to the pressure
Generating means for generating an electric field as the applied electric field; and responding to the pressing based on the electric field generated by the generating means .
Detecting means for detecting the position on the display screen corresponding to
And said generating means and detecting means, a stripe-shaped piezoelectric element which sandwiches a striped resistive electrodes arranged in a matrix, which detects the position based on the output of the resistive film electrode, wherein An input / output device, wherein the display means includes a sheet-like display element laminated on the piezoelectric element, and a light-transmissive transparent electrode that is grounded at least at the time of additional writing on the viewing side of the display screen.