JP2011048541A - Touch panel-equipped display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow input operation regardless of a touch means in a capacitance type touch panel. <P>SOLUTION: A touch panel-equipped display device includes: a display device; and a projection capacitance type touch panel including a sensor film including a plurality of sensor electrodes arranged inside a plane parallel to a screen of the display device to detect a contact position of a position indication means, having transmittance, and a control part detecting the contact position of the position indication means by measuring a capacitance change of the sensor electrode accompanying contact of the position indication means. The sensor film has flexibility, and is installed apart from the screen at a prescribed distance (for example, spacers are interposed) such that the sensor film is bent when pressing the touch panel and that the sensor film can be displaced to a direction to which the sensor electrode approaches the screen of the display device, and the control part measures the capacitance change by the displacement of the sensor electrode to detect the contact position of the position indication means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device with a touch panel, and more particularly to a panel structure that enables an input operation to a capacitive touch panel regardless of contact means such as a finger or a pen.

  A display device with a touch panel that combines a display device such as a liquid crystal display or an organic EL display and a touch panel that is a position input device has recently been used in various electronic devices, such as business machines such as automatic ticket machines, ATMs, and POS terminals, and office equipment. It is widely used as a display input device for home appliances, in-vehicle devices such as car navigation systems, mobile phones, digital audio players, PDAs (Personal Digital Assistants), and portable devices such as game machines.

  The touch panel provided in such an electronic device generally has a resistive film type, a capacitance type, an optical type, an ultrasonic type, and the like due to a difference in the detection principle of the touch position. There are known a surface-capacitance method and a projected-capacitance method.

  Capacitive touch panels, both surface type and projection type, detect the input position by detecting the change in capacitance that occurs at the touch position, and therefore involve mechanical contact deformation (depress the transparent conductive film). Compared to the resistance film type, it does not require input force, and has the feature that input can be performed with a light touch that touches the screen.

  Moreover, there is the following patent document as a display device including a touch panel.

JP 2003-99193 A JP 2007-115800 A JP 2007-140796 A JP 2008-134293 A

  By the way, the capacitive touch panel is light in touch and excellent in operability as described above. On the other hand, regardless of whether it is a surface type or projection type, the means for touching the screen is as conductive as a finger or a finger. Or it must have capacitive coupling.

  For this reason, for example, a pen with no conductivity or a general stylus that cannot be capacitively coupled to the sensor electrode in the panel (such as that used in a pressure-sensitive touch panel) cannot perform input. There is a lack of sex. Also, depending on the state of the fingertip, such as when wearing gloves or when the user has dry skin, it may be difficult to input with a finger.

  Furthermore, the inconvenience in such a capacitive touch panel cannot be eliminated by the invention described in the patent document.

  Accordingly, an object of the present invention is to enable an input operation regardless of touch means in a capacitive touch panel and further improve its convenience.

  In order to solve the above-described problems and achieve the object, a display device with a touch panel according to the present invention is a display device capable of displaying information on a screen, and is installed on the screen of the display device and designates a two-dimensional position. A sensor film that includes a plurality of sensor electrodes that are two-dimensionally arranged in a plane parallel to the screen to detect a contact position of the position indicating means, and an electrostatic force associated with the contact of the position indicating means. A projection capacitive touch panel including a control unit that detects a contact position of the position indicating unit by measuring a change in capacitance;

  The sensor film has flexibility and the surface of the screen so that when the touch panel is pressed by the position indicating means, the sensor film is bent and the sensor electrode can be displaced in a direction approaching the screen of the display device. The control unit detects the contact position of the position indicating means by measuring a change in capacitance due to the displacement of one or more sensor electrodes of the plurality of sensor electrodes. To do.

  The present invention enables input to a capacitive touch panel regardless of position indicating means (for example, a finger, a pen, a stylus, a finger wearing a glove, etc./hereinafter referred to as “contact body”). As one of the considerations, when the touch panel was placed floating from the screen of the display device (a gap was provided between the screen of the display device and the touch panel), the contact with the sensor electrode could not be capacitively coupled. It was discovered based on this discovery that the touch panel operates.

  At this time, a projected capacitive touch panel that has flexibility in the panel itself was used, and a pen that cannot be input with an existing projected capacitive touch panel. The operation was performed. At this time, the panel could not be operated simply by touching the panel surface, but input was possible by pressing the panel so as to dent (bend) it. When an operation was performed with a finger, it could be operated in the same manner even when it was touched or pressed in the same manner as a conventional touch panel.

  Conventionally, in a capacitive touch panel, a capacitance change (for example, an increase in capacitance between a finger and a sensor electrode, or a vertical or horizontal change) caused by a contact body (such as a finger) being a dielectric approaching a sensor electrode The touch position is detected by measuring which sensor electrode has increased capacitance, etc.), but the phenomenon underlying the present invention is that the touch position (or the vicinity thereof) is depressed when the touch panel is recessed. Because the sensor electrode arranged on the screen approaches the screen of the display device, the capacitance between the sensor electrode and the display device (screen) increases, and this is detected by the touch panel in the same way as when the finger approaches. It is thought that occurred.

  Therefore, according to the present invention, the sensor film is made flexible as described above, and the sensor film is installed at a certain distance from the screen of the display device, and when the touch panel is pressed by the position indicating means, The sensor electrode (a part of the sensor electrodes provided on the touch panel) is bent and can be displaced so as to approach the screen of the display device, that is, in a direction perpendicular (orthogonal) to the screen. To do. The control unit of the touch panel detects the change in capacitance due to the displacement of the sensor electrode, and detects the contact position of the position indicating means in the same manner as when touched with a finger.

  In the present invention, when the touch panel is pressed in this way, not only the sensor electrode arranged at the position closest to the pressing point by the position indicating means but also one or more sensor electrodes arranged around it are displaced. However, even in such a case, since the displacement (capacitance change) of the sensor electrode closest to the pressing point is the largest, for example, the largest capacitance change occurs among the sensor electrodes provided in the touch panel. It is possible to calculate the position of the pressing point by a known method by detecting the sensor electrode or, for example, from the distribution of the magnitude of the capacitance change generated in each of the plurality of sensor electrodes arranged in order.

  In the projected capacitive touch panel, for example, the following structure can be adopted for the sensor electrode arrangement structure, but any structure can be adopted in the present invention.

  First, a plurality of sensor electrodes are arranged in an array so that each sensor electrode functions as a single switch. Specifically, a sensor electrode that has been pressed by the contact body and has undergone a capacitance change (or the largest capacitance change has occurred) is detected, and the arrangement position of this sensor electrode is determined as the touch position by the contact body, In other words, a structure in which the control unit determines the arrangement position of the sensor electrode as the contact position of the contact body by detecting a change in the capacitance of the sensor electrode arranged at the contact position of the contact body (hereinafter referred to as this The structure is referred to as a “single plate switch type”. In this case, as the electrode layer including the sensor electrode, at least one electrode layer including the plurality of sensor electrodes may be provided in the touch panel.

  The second is a structure provided with a sensor grid, that is, a structure in which a plurality of sensor electrodes intersecting each other (for example, orthogonal to each other) are arranged in a mesh pattern on substantially the entire surface of the panel. More specifically, the sensor electrode includes a plurality of first electrodes extending in parallel to each other at a predetermined interval and extending in a first direction, and parallel to each other at a predetermined interval in the first direction. A plurality of second electrodes extending in a second direction substantially orthogonal to each other, wherein the control unit determines a contact position of the contact body as a coordinate axis parallel to the first direction and a coordinate axis parallel to the second direction. Is calculated as a coordinate position in a two-dimensional coordinate plane formed by (hereinafter, this structure is referred to as a “grid type”). In this case, as the electrode layer including the sensor electrode, at least two electrode layers including the electrode layer including the plurality of first electrodes and the electrode layer including the plurality of second electrodes may be provided in the touch panel.

  Each sensor electrode in the grid type panel may be a line (wire or conductor line), a strip-shaped (rectangular or strip-shaped) electrode, or a plurality of rhombuses as in the second embodiment described later. Various, such as electrodes that are connected by connecting electrode pieces electrically, or electrodes that connect a plurality of electrode pieces in the same way as square (square or rectangular), triangle, hexagon, polygon, etc. It may have a simple shape.

  Furthermore, since the present invention can change the capacitance of the sensor electrode in the same way as touched with a finger by making the sensor electrode displaceable as described above, the panel drive system (control unit) The method for detecting the touch position according to (1) is not particularly limited. For example, in the grid-type panel, the control unit measures the capacitance change by sequentially scanning the sensor electrode arranged in one coordinate axis direction of the two-dimensional coordinate axis and the sensor electrode arranged in the other coordinate axis direction. The touch position is detected as the coordinate position. In addition, an AC voltage of, for example, several hundred KHz is constantly applied to the sensor electrode, and the capacitance change is detected by detecting the AC voltage of the sensor electrode and monitoring the change (decrease) in the obtained DC voltage. Alternatively, the method of detecting the capacitance change is not limited to a specific method, such as detecting a capacitance change by applying a pulse voltage as an AC signal to the sensor electrode and observing the signal rise time (delay) due to the capacitance increase. Various known methods can be used.

  It should be noted that the touch position detection is different from the conventional one in that, instead of detecting the capacitance change of the sensor electrode due to capacitive coupling between the finger and the sensor electrode, in the present invention, some sensor electrodes are formed by denting the sensor film. It is the point which approaches the display device and detects the capacitance change of the sensor electrode caused by this. In the device of the present invention, when a panel is pressed using a dielectric (capable of capacitive coupling with a sensor electrode such as a finger) as a contact that touches the panel, the capacitance changes due to the proximity of the contact The touch position is detected by the control unit capturing both (total) of the capacitance change caused by the sensor electrode approaching the screen of the display device.

  As a specific method for installing the sensor film away from the screen surface, for example, a spacer may be interposed between the sensor film and the screen, thereby forming a gap between the sensor film and the screen. . In the conventional capacitive touch panel, the sensor film including the sensor electrode is in close contact with the screen surface of the display device through the adhesive layer. However, by interposing the spacer as described above, the sensor film is bent. The sensor electrode can be displaced so as to approach the screen. Further, even if a translucent elastic film (elastic film material) is interposed between the sensor film and the screen, the sensor electrode can be similarly displaced.

  As a material for forming the sensor electrode, for example, a light-transmitting conductive material such as ITO (Indium Tin Oxide / Indium Tin Oxide), IZO (Indium Zinc Oxide / Indium Zinc Oxide), tin oxide, or zinc oxide is used. I can do it.

  However, in the present invention, it is desirable that the sensor electrode has flexibility. For example, in the case of the single-plate switch type panel, each of the plurality of sensor electrodes (each electrode piece of the sensor electrode itself) arranged on the film (the film supporting the sensor electrode) does not have flexibility. Even if the supporting film has a structure having flexibility, the sensor electrode can be displaced by bending the supporting film. However, if the sensor electrode itself is flexible, the sensor film can be more flexible. This is because it is possible to perform an input operation by pressing. Further, if the sensor electrode itself is flexible, it is possible to prevent a situation in which the sensor electrode is damaged or peeled off by repeated pressing operations.

  Such a sensor electrode having flexibility includes, for example, a conductive powder having translucency, and a binder base material having translucency and capable of holding the conductive powder dispersed in the sensor electrode. Can be formed of a material (mixture of these conductive powder and binder base material).

  In this case, the conductive powder includes, for example, indium oxide or a material doped with elements such as tin, zinc, tellurium, silver, gallium, zirconium, hafnium, magnesium, tin oxide or antimony, zinc, fluorine, etc. Or an element doped with an element such as aluminum, gallium, indium, boron, fluorine, or manganese may be used.

  In addition, for example, a thermosetting resin or a photocurable resin can be used for the binder base material. More specifically, a resin material such as acrylic resin, epoxy resin, polystyrene, polyurethane, silicone resin, or fluorine resin may be used as the binder base material. In particular, acrylic resin is excellent in chemical resistance, and since it has high translucency, it can increase the transparency of the touch panel, and because it has excellent mechanical strength, it is also damaged by repeated pressing touch operations on the panel. It is advantageous in that it is difficult to use, and can be preferably used as the binder base material.

  For the display device of the present invention, for example, an organic EL display device including a display unit in which a plurality of organic EL elements are arranged in a matrix so as to constitute a pixel can be used. A liquid crystal display (LCD), a plasma display, a CRT (Cathode Ray Tube) display, or the like can also be used.

  Furthermore, the display device with a touch panel of the present invention can be used in various electronic devices, and the electronic device of the present invention uses any one of the display devices with a touch panel according to the present invention as means for displaying and inputting information. It is provided.

  Examples of electronic devices to which the present invention can be applied include portable electronic devices such as a mobile phone, a portable digital audio player, a portable game machine, a PDA (Personal Digital Assistant), an electronic notebook, and an electronic dictionary. However, the electronic device referred to in the present invention is not limited to a portable electronic device. For example, an in-vehicle electronic device such as a car navigation system, an audio device, various home appliances, an automatic ticket vending machine, a vending machine, an ATM, a POS terminal, etc. The present invention can be widely applied to various electronic devices equipped with a display with a touch panel, such as various types of business devices, office devices such as copiers and multifunction devices, and guide plates.

  According to the present invention, it is possible to further improve the convenience by enabling an input operation regardless of touch means on a capacitive touch panel.

  Other objects, features, and advantages of the present invention will become apparent from the following description of embodiments of the present invention described with reference to the drawings. In addition, in each figure, the same code | symbol shows the same or an equivalent part.

FIG. 1 is a plan view schematically showing a display device with a touch panel according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view (cross section AA in FIG. 1) schematically showing the display device with a touch panel according to the first embodiment. FIG. 3 is an enlarged cross-sectional view schematically showing the display device with a touch panel according to the first embodiment. FIG. 4 is a cross-sectional view schematically showing a display device with a touch panel according to a modification of the first embodiment. FIG. 5 is a plan view schematically showing a display device with a touch panel according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view (cross-section BB in FIG. 5) schematically showing the display device with a touch panel according to the second embodiment. FIG. 7 is an enlarged cross-sectional view schematically showing the display device with a touch panel according to the second embodiment. FIG. 8A is a bottom view schematically showing a sensor film for detecting a vertical position (Y coordinate position) included in the display device with a touch panel according to the second embodiment. FIG. 8B is a plan view schematically illustrating a lateral position (X coordinate position) detection sensor film included in the display device with a touch panel according to the second embodiment. FIG. 8C is a plan view schematically showing spacers provided in the display device with a touch panel according to the second embodiment. FIG. 9 is a plan view schematically showing another configuration example of the display device with a touch panel according to the present invention.

[First embodiment / Single plate switch type]
A first embodiment of the present invention will be described. As shown in FIG. 1 to FIG. 3, the display device according to the first embodiment of the present invention includes a single-panel switch type touch panel 11 that causes each of a plurality of sensor electrodes to function as a single switch. The sensor film 12 includes a plurality of (in this example, twelve) sensor electrodes 22 arranged in a matrix, and the sensor film 12 is separated from the screen 10 of the display device by a certain distance on the screen 10 of the display device. A spacer 14 for fixing and a protective film 13 covering the surface of the sensor film 12 are provided, and further, an IC (Integrated Circuit) (control unit) 15 for driving the touch panel 11 and a touch panel 11 (IC 15) are displayed on the display device. FPC (Flexible Printed Circuit Board) 16 that is electrically connected to the circuit board.

  As shown in an enlarged view in FIG. 3, the sensor film 12 includes a support film 21 having translucency and flexibility, and a sensor electrode 22 having translucency fixed to the upper surface of the support film 21. The support film 21 is formed of PET (polyethylene terephthalate), and the sensor electrode 22 is fixed to the upper surface of the support film 21 with an adhesive 23 made of, for example, an acrylic or epoxy type ultraviolet curable resin. The sensor electrode 22 may be formed by printing directly on the surface of the support film 21 by, for example, screen printing. In addition, in FIG. 2, the sensor film 12 and the protective film 13 are drawn as one layer, respectively. In FIG. 1, the protective film and the display device are not shown.

  Each sensor electrode 22 has a substantially square planar shape, and a conductive material in which ITO (Indium Tin Oxide), which is a light-transmitting conductive material, is dispersed in an acrylic resin that is a binder base material. It is made of material and has flexibility. Each sensor electrode 22 is electrically connected to the driving IC 15 by a conductor line 24 formed on the support film 21 by screen printing a conductive paste (for example, silver paste).

  Moreover, the protective film 13 is formed by PET like the support film 12, and has translucency and flexibility. The protective film 13 is adhered to the upper surface of the sensor film 12 with so-called optical glue 25 that causes little deterioration in optical characteristics.

  On the other hand, the spacer 14 arranged on the lower surface of the sensor film 12 (support film 21) surrounds the entire arrangement region of the sensor electrode 22 corresponding to the arrangement pattern of the sensor electrode 22, and is arranged in a matrix. It has a grid-like planar shape so as to pass between 22. The spacer 14 is made of a light-transmitting material such as PET, and is bonded to the lower surface of the sensor film 12 using, for example, optical glue or a light-transmitting adhesive 26 such as acrylic or epoxy. At the same time, it adheres to the surface of the screen 10 of the display device through the same adhesive 26. Thereby, when the touch panel 11 is fixed to the display device, a gap S is formed between the touch panel 11 and the screen 10 of the display device.

  Although the display device is an organic EL display, as described above, other displays such as a liquid crystal display may be used (the same applies to the second embodiment described later).

  The control unit (IC) 15 is configured such that the surface of the panel 11 (protective film 13) is pressed by the contact body 1 such as the finger 1a or the pen 1b, and the sensor electrode 22 is generated when the sensor electrode 22 approaches the screen 10 of the display device. The arrangement position of the sensor electrode 22 is detected as a pressed position by the contact body 1 by measuring a change in capacitance. Therefore, not only a dielectric such as the finger 1a but also a conductive stylus, an insulating pen 1b used in a pressure-sensitive (resistive film type, etc.) touch panel, or a finger wearing an insulating glove, etc. It is possible to input with various contact bodies 1 regardless of the presence or absence of capacitive coupling.

  Further, instead of the spacer 14, an elastic film 27 having translucency may be interposed between the sensor film 12 and the display device (screen 10) as shown in FIG. Even with such a structure, the sensor film 12 can be bent and the sensor electrode 22 can be displaced in the same manner as when the spacer 14 is used, so that input can be performed.

[Second Embodiment / Grid Type]
A second embodiment of the present invention will be described. As shown in FIGS. 5 to 7, the display device according to the second embodiment of the present invention includes a sensor grid and sets the touch position of the contact body to two-dimensional coordinates (XY coordinates) parallel to the screen of the display device. ) A touch panel that is calculated as a coordinate position (horizontal position and vertical position) in a plane is provided. For this reason, the touch panel 31 used in this embodiment includes the sensor film of only one layer. Unlike the above, two (two layers) sensor films 41 and 42 are provided.

  More specifically, the touch panel 31 according to the present embodiment includes a vertical position detection sensor film 41 (hereinafter referred to as a “Y sensor film”) and a horizontal position detection that are bonded together via optical glue 37. Sensor film 42 (hereinafter referred to as “X sensor film”), and further disposed on the lower surface of the X sensor film 42 located on the lower side (side closer to the screen 10 of the display device). The spacer 34 is interposed between the screen 10 and the sensor film 42.

  As shown in FIG. 8A, a Y sensor film 41 for detecting the position in the vertical direction has a plurality of rhombus (shaped by rotating a square by 45 °) electrode pieces 45 on the lower surface of the support film 35 by connecting conductors 46. The sensor electrodes 32a connected in a daisy chain and arranged so as to extend in the horizontal direction (X direction) in FIGS. 5 and 8A can be detected in the vertical direction (Y) so that the touch position in the vertical direction (Y-axis direction) can be detected. A plurality of them are arranged in parallel to each other in the axial direction). The left and right electrode pieces have a triangular planar shape, and each sensor electrode 32a and a driving IC (control unit) are connected by connecting a conductor line 24 made of silver paste to either the left or right of each sensor electrode 32a. 15 is electrically connected.

  The electrode pieces 45 and the connecting conductors 46 constituting the sensor electrode 32a are made of a conductive material having translucency and flexibility similar to those in the first embodiment. For example, screen printing is performed on the surface (lower surface) of the support film 35. (The same applies to the X sensor film 42 described later). The support film 35 is formed of a translucent resin material (for example, PET). The support film 35 also serves as a protective film that covers the surface of the touch panel 31. Therefore, in this embodiment, a protective film that covers the surface of the sensor film 41 is provided as in the first embodiment. There is no need.

  On the other hand, as shown in FIG. 8B, the X sensor film 42 for detecting the lateral position has the same shape as the Y sensor film 41 on the surface of the support film 36 made of PET, like the Y sensor film 41. However, each sensor electrode 32b is arranged to extend in the vertical direction (Y-axis direction) so that the touch position in the horizontal direction (X-axis direction) can be detected. In addition, a plurality of them are arranged in parallel in the lateral direction (X-axis direction). Therefore, the sensor electrodes 32b of the X sensor film 42 and the sensor electrodes 32a of the Y sensor film 41 are orthogonal to each other.

  The X sensor film 42 and the Y sensor film 41 are bonded together with optical glue 37 so that the sensor electrodes 32a and 32b on the surfaces of the support films 35 and 36 face each other. The sensor electrodes 32a and 32b of both sensor films 41 and 42 are combined with each other as if the pattern is rotated by 45 °, and the sensor 10 of the sensor film 41 or 42 for either X or Y is used to cover substantially the entire screen 10 of the display device. It arrange | positions so that the electrode piece 45 of the electrodes 32a and 32b may cover.

  In addition, about the number of sensor electrodes 32a and 32b of each sensor film 41 and 42 and the electrode piece 45 which comprises these, drawing does not show the number suitable for an actual apparatus, and actually more sensors shown in figure are shown. The electrodes 32a and 32b and the electrode piece 45 can be provided to increase the touch position detection accuracy. The sensor electrodes 32a and 32b (electrode pieces 45) may have various shapes as described above. For example, as shown in FIG. 9, wires (conductor lines) are arranged in a grid (vertical and horizontal directions). The touch position can be detected in the same manner even if the sensor electrodes 52a and 52b are provided. In addition to the illustrated examples, sensor electrodes having various shapes, arrangement patterns, and structures can be employed. It is.

  The spacer 34 corresponds to the shape of the sensor electrodes 32a and 32b, surrounds the entire sensor electrodes 32a and 32b arranged as described above, and the electrode piece of the X sensor film 42 when viewed from the plane. 45 and a net-like planar shape so as to be disposed in a gap formed between the electrode piece 45 of the Y sensor film 41. As with the spacer 14 of the first embodiment, the spacer 34 is formed of a light-transmitting material, such as PET, and uses an optical glue or an adhesive 26 having a light-transmitting property such as acrylic or epoxy. Then, it adheres to the lower surface of the X sensor film 42 and also adheres to the surface of the screen 10 of the display device. Thereby, the clearance gap S can be formed between the sensor films 41 and 42 and the screen 10 of a display apparatus. In this embodiment, instead of the spacer 34, an elastic film having translucency as described in the first embodiment (FIG. 4) may be provided.

  The control unit (IC) 15 is configured so that the X sensor film 42 and the Y sensor film 41 are generated when the touch panel 31 is pressed, the sensor films 41 and 42 are bent, and the sensor electrodes 32a and 32b approach the screen 10 of the display device. The capacitance change of each sensor electrode 32a, 32b is measured, and the touch position of the contact body is calculated as the coordinate position (intersection of the position in the X-axis direction and the position in the Y-axis direction) based on these capacitance changes. In addition to the above-described methods for driving the sensor electrodes arranged in the vertical and horizontal directions and the method for calculating the coordinate position in this way, various known methods can be adopted, which is essential for the present invention. Detailed explanation is omitted because it is not a matter.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these, It is clear to those skilled in the art that a various change can be made within the range as described in a claim. .

  For example, the spacer provided in the present invention only needs to be capable of forming a gap between the screen of the display device and the sensor film, and therefore the planar shape and pattern may be various in addition to the illustrated example. Absent. Further, the spacer itself may be made elastic by forming the spacer from an elastic material. Furthermore, the spacer may be flexible as well as the protective film and the sensor film, and according to such a structure, the entire touch panel has flexibility. In contrast, the touch panel can be easily installed.

  Further, the configuration of the touch panel body (sensor film, protective film, control unit, etc.) may be various in addition to the embodiment, and various capacitances that can detect a touch position by detecting a change in capacitance. The present invention can be applied to a touch panel.

S clearance 1 contact body (position indicating means)
DESCRIPTION OF SYMBOLS 1a Finger 1b Pen 10 Screen of display device 11, 31 Touch panel 12 Sensor film 13 Protective film 14, 34 Spacer 15 IC (control unit)
16 FPC
21, 35, 36 Support film 22, 32a, 32b, 52a, 52b Sensor electrode 23, 25, 26, 37 Optical glue or adhesive 24 Conductor line 27 Elastic film 41 Sensor film for longitudinal position detection (sensor film for Y)
42 Sensor film for lateral position detection (sensor film for X)
45 Electrode piece 46 Connecting conductor

Claims (10)

A display device capable of displaying information on the screen;
A plurality of two-dimensionally arranged light-transmitting elements which are two-dimensionally arranged in a plane parallel to the screen for detecting a contact position of a position indicating means which is installed on the screen of the display device and designates a two-dimensional position A projection-type electrostatic including a sensor film including a plurality of sensor electrodes and a control unit that detects a contact position of the position indicating unit by measuring a change in capacitance of the sensor electrode due to the contact of the position indicating unit. A display device with a touch panel comprising a capacitive touch panel,
The screen of the sensor film is flexible and can be displaced in a direction in which the sensor film bends and the sensor electrode approaches the screen of the display device when the touch panel is pressed by the position indicating unit. Installed at a certain distance from the surface of the
The control unit detects a contact position of the position indicating means by measuring a change in capacitance due to the displacement of one or more sensor electrodes of the plurality of sensor electrodes. apparatus. A spacer is interposed between the sensor film and the screen to form a gap between the sensor film and the screen, so that the sensor electrode can be displaced in a direction approaching the screen of the display device. The display device with a touch panel according to claim 1. The film according to claim 1, further comprising a film that is interposed between the sensor film and the screen and has translucency and elasticity, so that the sensor electrode can be displaced in a direction approaching the screen of the display device. Display device with touch panel. The sensor electrode is
It consists of a material mainly composed of a conductive powder having translucency, and a binder substrate having translucency and capable of holding the conductive powder dispersed in the sensor electrode,
The display device with a touch panel according to claim 1, wherein the display device has flexibility. The control unit detects an arrangement position of the sensor electrode as a contact position of the position instruction means by detecting a change in capacitance of the sensor electrode arranged at the contact position of the position instruction means. 4. A display device with a touch panel according to any one of 4 above. The sensor electrode is
A plurality of first electrodes extending in parallel to each other and in a first direction at regular intervals;
A plurality of second electrodes extending in a second direction parallel to each other at a predetermined interval and substantially perpendicular to the first direction;
The control unit calculates a contact position of the position indicating unit as a coordinate position in a two-dimensional plane formed by a coordinate axis parallel to the first direction and a coordinate axis parallel to the second direction. The display device with a touch panel according to any one of 1 to 4. The display device with a touch panel according to claim 1, wherein the display device is an organic EL display device including a display unit in which a plurality of organic EL elements are arranged in a matrix so as to constitute a pixel. .   The electronic device provided with the display apparatus with a touchscreen as described in any one of the said Claim 1 to 7 as a means to display and input information. A sensor film including a plurality of sensor electrodes that are arranged to detect the contact position of the position indicating means and have translucency;
A controller that detects a contact position of the position indicating means by measuring a change in capacitance of the sensor electrode accompanying the contact of the position indicating means, and
A capacitive touch panel installed on the screen surface of the display device,
The sensor film has flexibility,
A capacitive touch panel comprising a spacer on the back side of the sensor film, which is interposed between the sensor film and the screen and capable of forming a gap between the sensor film and the screen. . The sensor electrode is
It consists of a material mainly composed of a conductive powder having translucency, and a binder substrate having translucency and capable of holding the conductive powder dispersed in the sensor electrode,
The capacitive touch panel according to claim 9, which has flexibility.

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