WO2010016174A1 - タッチパネル、表示装置及び電子機器 - Google Patents
タッチパネル、表示装置及び電子機器 Download PDFInfo
- Publication number
- WO2010016174A1 WO2010016174A1 PCT/JP2009/002251 JP2009002251W WO2010016174A1 WO 2010016174 A1 WO2010016174 A1 WO 2010016174A1 JP 2009002251 W JP2009002251 W JP 2009002251W WO 2010016174 A1 WO2010016174 A1 WO 2010016174A1
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- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- touch panel
- detection electrode
- touch detection
- touch
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10128—Display
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10431—Details of mounted components
- H05K2201/10507—Involving several components
- H05K2201/10545—Related components mounted on both sides of the PCB
Definitions
- the present invention relates to a touch panel, a display device, and an electronic device.
- An electronic device including a display device on which a touch panel is mounted is configured to be operable by touching, for example, an icon displayed on the display screen of the display device via the touch panel.
- a touch panel for example, by reading a locus traced with a finger on the display screen, a character or a picture can be input by handwriting, or a gesture of stroking the display screen in one direction can be performed.
- Various actions are possible based on the actions of people on the display screen, such as performing operations such as enlargement, reduction, and page turning.
- touch panels have been installed in various electronic devices such as ATM (automated teller machines), automatic ticket vending machines, personal computer monitors, car navigation systems, game machines, PDAs (personal digital assistant), copiers, and mobile phones.
- ATM automated teller machines
- PDA personal digital assistant
- copiers copiers
- mobile phones mobile phones
- Patent Document 1 discloses that an upper surface of an insulating base material having a flexure formed between an upper electrode member and a lower electrode member in a frame shape and integrally projecting an external connection portion outside the frame on one side thereof, and A narrow frame touch panel is disclosed in which a circuit sheet having a bus bar and a routing circuit is disposed on the lower surface. And according to this, it is described that there is no need for a space for inserting and crimping the end of the flexible printed wiring board as a connector on one side of the touch panel, and that the frame can be narrowed on the four sides of the touch panel. Yes.
- FIG. 12 is a plan view of a conventional capacitive touch panel 120.
- the touch panel 120 includes, for example, a rectangular insulating substrate 110, a transparent touch detection electrode 111 provided in a rectangular shape on the insulating substrate 110, and a frame along the periphery of the touch detection electrode 111.
- Frame wiring 112 provided in a shape, and four lead wirings 113 provided so as to be bent and drawn from the four corners of the frame wiring 112 to a region along one edge of the insulating substrate 110. ing.
- each lead-out wiring 113 is connected to an external position detection circuit (not shown) via an FPC (flexible printed circuit) 114 as shown in FIG. ing.
- FPC flexible printed circuit
- the conventional touch panel at least a part of the plurality of lead wires for connecting to the outside in the frame region on the periphery of the substrate is bent, and the connection terminals at the end portions of the lead wires are connected to the substrate. Since it is formed in a direction perpendicular to one edge, in a display device on which the touch panel is mounted and an electronic device equipped with the display device, the frame area is larger than the display area, and the entire device (apparatus The whole) becomes large. In particular, electronic devices for mobile use are required to have a large display area and to make the entire device compact so that it can be carried in a pocket or a bag.
- the touch panel is manufactured by dividing it into individual pieces after thin film formation on a fixed size large substrate, so if the frame area becomes large, the number of touch panel touches on the fixed size large substrate decreases. This reduces the manufacturing efficiency of the touch panel.
- the present invention has been made in view of such a point, and an object of the present invention is to make the frame area as small as possible and improve the manufacturing efficiency.
- connection terminal of the lead wiring of the touch detection electrode provided on the first substrate is formed linearly along one edge of the first substrate, A connection portion provided so that the provided external wiring overlaps the connection terminal and a wiring portion bent from the connection portion are provided.
- a touch panel includes a touch detection electrode provided on a rectangular first substrate so as to be capable of touch detection, and one of the first substrates from the touch detection electrode along the periphery of the first substrate.
- a lead-out wiring that is drawn out to a region along the edge and having a connection terminal formed in the region; and a second substrate fixed to a region along one edge of the first substrate, the connection terminal
- the external wiring is formed in a line shape along one edge, and the external wiring extends in a direction away from the touch detection electrode by bending from the connection portion provided to overlap the connection terminal.
- the lead-out wiring led out from the touch detection electrode to the region along one edge of the substrate along the peripheral edge of the substrate has the connection terminal in the region. Since the connection terminal is formed linearly along one edge of the substrate, for example, when the connection terminal is formed by bending the lead-out wiring in a region along one edge of the substrate ( 12), the width of the region along one edge of the first substrate on which the connection terminal is formed, that is, the width of one side of the frame region on which the connection terminal is formed can be made narrower. Become. Further, in the second substrate fixed in the region along one edge of the first substrate, the connection portion of the external wiring is provided so as to overlap the connection terminal in order to connect to the connection terminal on the first substrate.
- the touch detection electrode passes through the lead wiring and the external wiring.
- the touch detection electrode is connected to an external position detection circuit.
- the touch panel provided with a substrate such as an FPC for connection to the position detection circuit, the width of one side where the connection terminals are formed is narrowed out of the four sides of the frame region.
- the manufacturing efficiency can be improved.
- the second substrate may be a flexible substrate having flexibility.
- the second substrate is a flexible substrate such as an FPC
- the second substrate can be easily and inexpensively configured, and the second substrate can be folded in the state.
- the frame area can be further reduced.
- a plurality of the lead wires may be provided for the touch detection electrode, and the connection terminals of the lead wires may be provided adjacent to each other.
- connection terminals of each lead-out wiring are provided adjacent to each other, the connection portion connected to the connection terminal of each lead-out wiring, that is, the second substrate on which the external wiring is formed The area can be reduced.
- a plurality of the lead wires are provided with respect to the touch detection electrode, and the plurality of lead wires are a first lead wire drawn from the touch detection electrode in one direction and the other direction from the touch detection electrode. You may be comprised by the 2nd extraction
- the plurality of lead wires are constituted by the first lead wire and the second lead wire that are led from the touch detection electrode in one direction and the other direction, respectively.
- the width of one side of the frame area in which the connection terminals are formed is narrower than when the is extracted from the touch detection electrode around the same direction, and the frame area can be made smaller. Further, since the width of one side of the frame region where the connection terminals are formed can be reduced without increasing the number of wirings, the manufacturing process is simplified and the manufacturing yield is easily improved. .
- An alignment mark for aligning the first substrate and the second substrate may be provided between the connection terminal of the first lead wiring and the connection terminal of the second lead wiring.
- the alignment mark is arrange
- a pair of the alignment marks may be provided so as to be separated along one edge of the first substrate.
- the pair of alignment marks are provided so as to be separated along one edge of the first substrate, the pair of alignment marks on the first substrate and correspondingly provided By aligning the first substrate and the second substrate so that the pair of alignment marks of the second substrate thus overlapped, the angular displacement of the second substrate with respect to the first substrate is suppressed, and the first substrate By suppressing the displacement of the second substrate with respect to the first substrate in the direction along one edge of the substrate, short-circuit defects and the like are suppressed, and the manufacturing yield and product quality are improved.
- a pair of the alignment marks may be provided so as to be separated from each other in a direction perpendicular to one edge of the first substrate.
- the pair of alignment marks are provided so as to be separated from each other in the direction perpendicular to the one edge of the first substrate.
- the first substrate in a direction perpendicular to one edge of the first substrate by aligning the first substrate and the second substrate so that the pair of alignment marks of the second substrate provided in an overlapping manner.
- the position shift of the second substrate with respect to is suppressed, at least one of the line width of the connection terminals and between the lines, and thus the connection pitch is reduced, and the width of one side of the frame region where the connection terminals are formed is reduced. Is possible.
- the position touched on the touch detection electrode may be detected by a capacitance method.
- the capacitive touch panel since the capacitive touch panel is configured, it is possible to use a substrate having higher rigidity than the resistive touch panel as the first substrate, and a display device including the touch panel And in electronic equipment, good display quality is maintained.
- the substrate including the touch detection electrodes that is, the first substrate is one
- the touch panel can be made thinner and lighter, and the manufacturing process can be simplified.
- the capacitive method there is a method of forming the touch detection electrode with a single layer, in which case, compared to the method of crossing the electrode layer lines through the insulating film and the method of forming the touch detection electrode with multiple layers, Since the manufacturing efficiency is simplified and the product structure and electrode pattern are also simple, the manufacturing defect rate is greatly reduced.
- the touch detection electrode may be provided in a rectangular shape on the entire inner side of the frame area defined on the periphery of the first substrate.
- the touch detection area in the rectangular touch panel area can be increased, and the touch panel can be reduced in thickness and manufacturing process. Simplification is possible.
- a display device includes the touch panel.
- the frame area of the touch panel is made as small as possible
- the frame area of the display device including the touch panel is made as small as possible, and the display device can be downsized.
- the display panel may include a pair of substrates disposed to face each other, and the first substrate may be one of the pair of substrates.
- substrate) which comprise a display panel are shared, the reflected light resulting from the board
- production is reduced and the display quality of a display apparatus improves, and it becomes possible to make a display apparatus thin.
- the manufacturing process is simplified and the manufacturing yield is easily improved.
- an electronic apparatus is characterized by including the display device.
- the frame area of a display apparatus is made as small as possible, the frame area of the electronic device provided with the display apparatus also becomes as small as possible, and size reduction of an electronic device is attained. Become.
- the first substrate may be the cover substrate.
- substrate) which comprise a touch panel are shared, generation
- the display quality of the electronic device is improved and the electronic device can be made thinner.
- the manufacturing process is simplified and the manufacturing yield is easily improved.
- an electronic device is characterized by including the touch panel.
- the frame area of the touch panel is made as small as possible
- the frame area of the electronic device equipped with the touch panel is made as small as possible, and the electronic device can be downsized.
- the first substrate may be the cover substrate.
- the cover substrate that protects the surface of the electronic device and the substrate that constitutes the touch panel (first substrate) are shared, the electronic device can be thinned.
- the manufacturing process is simplified and the manufacturing yield is easily improved.
- connection terminal of the lead wiring for the touch detection electrode provided on the first substrate is formed in a line shape along one edge of the first substrate, and the external wiring provided on the second substrate is provided. Since the connection portion provided so as to overlap the connection terminal and the wiring portion bent from the connection portion are provided, the frame region can be made as small as possible to improve the manufacturing efficiency.
- FIG. 1 is a plan view of the touch panel 20a according to the first embodiment.
- FIG. 2 is a cross-sectional view of the touch panel 20a and the liquid crystal display device 40a including the same along the line II-II in FIG.
- FIG. 3 is a schematic diagram of the alignment mark M formed on the touch panel 20a.
- FIG. 4 is a perspective view of a digital camera 50a including the liquid crystal display device 40a.
- FIG. 5 is a front view of a mobile phone 50b including the liquid crystal display device 40a.
- FIG. 6 is a cross-sectional view of an electronic device 50c according to the second embodiment.
- FIG. 7 is a cross-sectional view of the liquid crystal display device 40c according to the third embodiment.
- FIG. 8 is a plan view of the touch panel 20b according to the fourth embodiment.
- FIG. 9 is a cross-sectional view of the touch panel 20b along the line IX-IX in FIG.
- FIG. 10 is a cross-sectional view of a mobile phone 50d according to the fifth embodiment.
- FIG. 11 is a cross-sectional view of a remote control device 50e according to the fifth embodiment.
- FIG. 12 is a plan view of a conventional capacitive touch panel 120.
- Embodiment 1 of the Invention 1 to 5 show Embodiment 1 of a touch panel, a display device, and an electronic device according to the present invention.
- FIG. 1 is a plan view of the touch panel 20a of the present embodiment
- FIG. 2 is a cross-sectional view of the touch panel 20a and a liquid crystal display device 40a including the same along the line II-II in FIG. .
- the liquid crystal display device 40a includes, for example, an active matrix liquid crystal display panel 30 and an analog capacitive touch panel 20a provided on the liquid crystal display panel 30 via an adhesive layer 25a. And.
- the liquid crystal display panel 30 is provided between an active matrix substrate 31 and a counter substrate 32 provided as a pair of substrates arranged to face each other, and between the active matrix substrate 31 and the counter substrate 32.
- Liquid crystal layer (not shown).
- polarizing plates (not shown) are respectively attached to the upper and lower surfaces of the liquid crystal display panel 30.
- the active matrix substrate 31 includes, for example, a plurality of gate lines (not shown) provided so as to extend in parallel with each other on a glass substrate, a gate insulating film (not shown) provided so as to cover each gate line, A plurality of source lines (not shown) provided on the gate insulating film so as to extend in parallel to each other in a direction orthogonal to the gate lines, and a plurality of source lines provided at each gate line and each intersection of the source lines.
- each pixel electrode constitutes a pixel which is the minimum unit of an image, and constitutes a display area for displaying an image as a whole by arranging in a matrix.
- the counter substrate 32 includes, for example, a black matrix (not shown) provided in a frame shape on the glass substrate and in a lattice shape in the frame, and a red layer, a green layer, and a black layer provided between the lattices of the black matrix, respectively.
- a colored layer such as a blue layer, a common electrode (not shown) provided so as to cover the black matrix and each colored layer, and an alignment film (not shown) provided so as to cover the common electrode I have.
- the touch panel 20 a is, for example, in a region along a rectangular first substrate 10 such as a glass substrate and one edge (the right side in FIG. 1) of the first substrate 10.
- a T-shaped second substrate 15a such as a flexible printed circuit (FPC) fixed via an ACF (Anisotropic Conductive Film, not shown) or the like.
- the touch detection electrode 11 is provided in a rectangular shape on the upper surface of the first substrate 10, and the frame wiring 12 is provided on the touch detection electrode 11 so as to extend along each side.
- the pair of first lead wires 13a and the pair of pairs are drawn out from each corner of the touch detection electrode 11 to a region along one edge of the substrate (the right side in FIG. 1) along the periphery of the substrate.
- a second lead wiring 13b is provided.
- the frame wiring 12 may be formed in a frame shape by connecting the respective sides.
- the touch detection electrode 11 is formed of, for example, a transparent conductive film or a colored translucent conductive film made of ITO (Indium / Tin / Oxide) or an organic conductive material.
- the frame wiring 12, the first lead wiring 13a, and the second lead wiring 13b are, for example, a single-layer or multi-layer relatively thin metal film made of a simple substance such as aluminum, titanium, copper, molybdenum, tantalum, or an alloy thereof, Alternatively, it is formed of a relatively thick metal film made of a conductive paste such as silver, palladium, silver-palladium, or copper.
- the frame wiring 12 is a linearization pattern for uniformly and improving the linearity of the electric field distributed on the touch detection electrode 11a.
- the pattern shape is not shown in figure, the frame wiring 12 may be a complicated pattern shape.
- the first lead-out wiring 13 a is led out clockwise from the upper left corner and upper right corner of the touch detection electrode 11.
- the second lead-out wiring 13 b is led out counterclockwise from the lower left corner and the lower right corner of the touch detection electrode 11.
- each end of the first lead-out wiring 13a and the second lead-out wiring 13b has a linear shape extending along one end edge (the right side in FIG. 1) of the first substrate 10.
- Connection terminals T are provided respectively.
- the interval between the connection terminals T is, for example, about several hundred ⁇ m.
- connection terminals T are provided adjacent to each other as shown in FIG.
- FIG. 3 is a schematic diagram of the alignment mark M formed on the touch panel 20a.
- the alignment mark M includes, for example, a lower mark Ma provided on the first substrate 10 and an upper mark Mb provided on the second substrate 15a. It has.
- the lower mark Ma is provided in a square shape
- the upper mark Mb is provided in a frame shape so as to surround the lower mark Ma.
- the lower mark Ma is provided in a square shape
- the upper mark Mb is provided in a pair of L shapes so as to surround the lower mark Ma.
- the lower mark Ma is provided in a cross shape
- the upper mark Mb is formed in four square shapes so as to surround the lower mark Ma in an oblique direction of the lower mark Ma. Is provided.
- the lower mark Ma is provided in two spaced square shapes, and the upper mark Mb has two square openings so as to accommodate the lower marks Ma in plan view. It is provided in a rectangular shape.
- the upper surface of the first substrate 10 is made of an organic resin film such as an acrylic resin so as to cover portions other than the connection terminals T of the touch detection electrode 11, the frame wiring 12, and the first extraction wiring 13a and the second extraction wiring 13b.
- An insulating layer may be provided.
- this insulating layer in order to suppress deterioration of the transparent conductive film which consists of ITO, the organic resin film which does not contain carboxylic acid is preferable.
- an L-shaped external part is connected to each connection terminal T of the first lead-out wiring 13a and the second lead-out wiring 13b on the first substrate 10.
- Four wirings 16 are provided.
- the external wiring 16 includes a connection portion 16 a provided so as to overlap the connection terminal T, and a wiring provided so as to bend from the connection portion 16 a and extend in a direction away from the touch detection electrode 11.
- Part 16b the external wiring 16 is formed of a copper foil or the like that constitutes the conductive layer of the FPC.
- the wiring portion 16b may be bent at a position that overlaps the end of the connection terminal T, or may be bent on the outside (outside of the terminal) or the inside (inside of the terminal) by several mm from the position.
- an insulating layer made of an organic resin film is provided so as to cover the wiring portion 16b of each external wiring 16.
- this insulating layer it is formed with the cover film etc. which comprise FPC.
- a display area D that displays an image inside each frame wiring 12, and each frame wiring 12, the first lead wiring 13a, and the second lead wiring 13b around the display area D.
- Each frame region F in which is arranged is defined.
- the adhesive layer 25a is, for example, an acrylic resin.
- the liquid crystal display device 40a having the above configuration adjusts the transmittance of light transmitted through the liquid crystal display panel 30 by applying a predetermined voltage to the liquid crystal layer between the active matrix substrate 31 and the counter substrate 32, and the touch panel 20a.
- the image is displayed via the touch detection electrode 11 and the surface of the touch detection electrode 11 is touched via a cover substrate (not shown) or a protective film (not shown), so that the human body is touched at the position where the touch detection electrode 11 is touched.
- a change occurs in the capacitance between each corner of the touch detection electrode 11 and the touched position, which is grounded via the capacitance, and the first lead wire 13a and the second lead wire 13b at that time, that is, Based on the value of the current flowing through each external wiring 16, the position where the embedded IC (integrated circuit) in the position detection circuit (not shown) connected to each external wiring 16 is touched. It is configured to detect and calculate in software.
- a total of four lead wires including the first lead wire 13a and the second lead wire 13b are connected to the touch detection electrode 11, and the first lead wire 13a and the second lead wire 13b are connected.
- the number of lead-out wirings connected to the touch detection electrode 11 is not limited to four.
- the minimum number of lead wires required for detecting a two-dimensional position is three.
- the rectangular first substrate 10 is drawn from the touch detection electrode 11 to the region along one edge of the substrate along the peripheral edge of the substrate.
- Each first lead wire 13a and each second lead wire 13b has a connection terminal T in the region, and the connection terminal T is formed linearly along one edge of the substrate.
- the connection terminal T is formed along one edge of the first substrate 10 on which the connection terminal T is formed. The width of the region, that is, the width of one side of the frame region F in which the connection terminal T is formed can be reduced.
- connection portion 16 a of the external wiring 16 is connected to the connection terminal T on the first substrate 10, so that the connection terminal Since the wiring portion 16b of the external wiring 16 is bent from the connection portion 16a and extends in a direction away from the touch detection electrode 11 on the first substrate 10, the wiring portion 16b of the external wiring 16 is provided so as to overlap with T.
- the touch detection electrode 11 is connected to, for example, an external position detection circuit via the first lead wire 13a, the second lead wire 13b, and the external wire 16.
- the liquid crystal display device 40a of this embodiment since the frame area F of the touch panel 20a is as small as possible, the frame area of the liquid crystal display device 40a including the touch panel 20a is also as small as possible. Thus, the liquid crystal display device 40a can be reduced in size.
- the second substrate 15a is a flexible substrate such as an FPC, and therefore the second substrate 15a can be configured easily and inexpensively.
- the frame region F can be further reduced by fixing the second substrate 15a to the first substrate 10 in a bent state.
- connection terminals T are provided adjacent to each other in each of the first extraction wirings 13a and each of the second extraction wirings 13b.
- the area of the connection portion 16a connected to the connection terminal T of each first lead wire 13a and each second lead wire 13b, that is, the second substrate 15a on which the external wire 16 is formed, can be reduced.
- the area of the second substrate 15a is reduced, wrinkles, twists, stretches and contractions due to the thermal history and water absorption of the substrate when the second substrate 15a is processed can be suppressed, and the second substrate 15a can be accurately controlled. Can be processed well.
- the alignment mark M is disposed between the connection terminal T of the first lead-out wiring 13a and the connection terminal T of the second lead-out wiring 13b. Therefore, even if the alignment mark M for aligning the first substrate 10 and the second substrate 15a is provided on the first substrate 10 and the second substrate 15a, the frame on which each connection terminal T is formed. The width of one side of the region F can be kept narrow.
- the pair of alignment marks M are provided so as to be separated in a direction perpendicular to one edge of the first substrate 10. Therefore, the first substrate 10 and the second substrate 15a are placed so that the pair of alignment marks M on the first substrate 10 and the pair of alignment marks M on the second substrate 15a provided in correspondence thereto overlap.
- connection pitch is reduced, and the width of one side of the frame region F in which each connection terminal T is formed can be reduced.
- an analog capacitive touch panel is configured, so that a substrate having higher rigidity than the resistive film type touch panel can be used as the first substrate 10.
- the liquid crystal display device 40a provided with the touch panel 20a and electronic devices 50a and 50b described later can maintain good display quality.
- the substrate including the touch detection electrode 11, that is, the first substrate 10 is one, the touch panel can be made thinner and lighter, and the manufacturing process can be simplified.
- the capacitive touch panel in which the touch detection electrode is formed with a single layer compared to the method in which the lines of the electrode layer intersect through the insulating film or the method in which the touch detection electrode is formed in multiple layers, Manufacturing efficiency can be simplified, and the product structure and electrode pattern are simple, so that the manufacturing defect rate can be greatly reduced.
- the touch detection electrode 11 is provided in a rectangular shape on the entire inner side of the frame area F, the touch detection area in the rectangular touch panel area can be enlarged.
- FIG.4 and FIG.5 has shown the electronic device provided with the liquid crystal display device 40a.
- FIG. 4 is a perspective view of a digital camera 50a provided with a liquid crystal display device 40a
- FIG. 5 is a front view of a mobile phone 50b provided with the liquid crystal display device 40a.
- the digital camera 50a includes a casing 41 having an opening formed so that the display area D of the touch panel 20a constituting the liquid crystal display device 40a is exposed through the cover or directly, and the casing 41. And a liquid crystal display device 40a housed in the housing.
- the frame area F of the liquid crystal display device 40a is small as described above, the width da of the frame area of the housing 41 can be reduced as shown in FIG. Can be
- the mobile phone 50b includes a first casing 42a having an opening formed so that a display area of the touch panel 20a constituting the liquid crystal display device 40a is exposed through a cover or directly.
- the liquid crystal display device 40a accommodated in the first housing 42a and the second housing 42b provided on the first housing 42a so as to be foldable via the hinge portion 43 are provided.
- the width db of the frame area of the first housing 42a can be narrowed as shown in FIG. Can be miniaturized.
- the liquid crystal display panel 30 and the touch panel 20a are bonded to each other by the adhesive layer 25a.
- the liquid crystal display panel 30 and the touch panel 20a are sandwiched between the liquid crystal display panel 30 and the touch panel 20a.
- the liquid crystal display panel 30 and the touch panel 20a may be fixed to each other by housing the inside of the housing.
- FIG. 6 is a cross-sectional view of the electronic device 50c of this embodiment.
- the same portions as those in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the first substrate 10 side of the touch panel 20a is attached to the liquid crystal display panel 30, but in this embodiment, the touch detection electrode 11 side of the touch panel 20a is attached to the liquid crystal display panel 30,
- the first substrate (10c) of the touch panel 20a functions as a cover substrate 10c that protects the display screen (touch surface) of the electronic device.
- the electronic device 50c includes a liquid crystal display device 40b and a housing 44 for housing the liquid crystal display device 40b.
- the liquid crystal display device 40b includes a liquid crystal display panel 30 and a touch panel 20a provided on the liquid crystal display panel 30 via an adhesive layer 25b.
- the adhesive layer 25b is made of the same material as the adhesive layer 25a of the first embodiment.
- the casing 44 is formed with a rectangular opening so that the main part (display area) of the touch panel 20a is exposed, and the opening is a first substrate of the touch panel 20a. A certain cover substrate 10c is fitted.
- the frame area can be made as small as possible to improve manufacturing efficiency, and the cover substrate that protects the surface of the electronic device 50c. Since 10c and the first substrate constituting the touch panel are shared, the generation of reflected light due to the substrate constituting the touch panel can be reduced, and the display quality of the electronic device 50c can be improved.
- the device 50c can be thinned. Furthermore, the manufacturing process is simplified, and the manufacturing yield is easily improved.
- FIG. 7 is a cross-sectional view of the liquid crystal display device 40c of this embodiment.
- the first substrate of the touch panel 20a is configured by the cover substrate 10c of the electronic device 50c.
- the first substrate 10 of the touch panel 20a is configured by the counter substrate 32 of the liquid crystal display panel 30. is doing.
- the liquid crystal display device 40c is provided with the liquid crystal display panel 30, the touch panel 20a having the counter substrate 32 of the liquid crystal display panel 30 as the first substrate 10, and the touch panel 20a with an adhesive layer 25c interposed therebetween.
- a cover substrate 9 is a glass substrate or a plastic substrate.
- the adhesive layer 25c is made of the same material as the adhesive layer 25a of the first embodiment.
- polarizing plates 33a and 33b attached to the upper and lower surfaces of the liquid crystal display panel 30 are shown.
- the frame area can be made as small as possible to improve manufacturing efficiency, and the first touch panel 20a is configured. Since the substrate 10 and the counter substrate 32 constituting the liquid crystal display panel 30 are shared, the generation of reflected light due to the substrate constituting the touch panel is reduced, and the display quality of the liquid crystal display device 40c can be improved. In addition, the liquid crystal display device 40c can be thinned. Furthermore, the manufacturing process is simplified, and the manufacturing yield is easily improved.
- FIG. 8 is a plan view of the touch panel 20b of the present embodiment
- FIG. 9 is a cross-sectional view of the touch panel 20b along the line IX-IX in FIG.
- analog capacitive touch panel 20a is illustrated, but in this embodiment, a digital (matrix) resistive touch panel 20b is illustrated.
- the touch panel 20b is provided, for example, via a top surface side first substrate 10a such as a glass substrate and a spacer (not shown) so as to face the top surface side first substrate 10a. It is sandwiched between the lower surface side first substrate 10b such as a glass substrate and one end of each of the upper surface side first substrate 10a and the lower surface side first substrate 10b (the right side in FIG. 8), and the upper surface side first substrate 10a. And a second substrate 15b having a rectangular shape such as a double-sided wiring type FPC fixed to an area along one end edge (the right side in FIG. 8) of the lower surface side first substrate 10b via an ACF or the like. ing.
- a top surface side first substrate 10a such as a glass substrate and a spacer (not shown) so as to face the top surface side first substrate 10a. It is sandwiched between the lower surface side first substrate 10b such as a glass substrate and one end of each of the upper surface side first substrate 10a and the lower surface side first substrate 10b (
- a plurality of touch detection electrodes 11a are provided on the lower surface of the upper surface side first substrate 10a so as to extend in parallel with each other by a transparent conductive film such as ITO.
- a plurality of first lead-out wirings 13c are provided so as to be drawn out counterclockwise from the end portion to a region along one edge of the substrate (the right side in FIGS. 8 and 9) along the peripheral edge of the substrate. Yes.
- a plurality of touch detection electrodes 11b are provided on the upper surface of the lower surface side first substrate 10b by a transparent conductive film such as ITO so as to extend in parallel to each other.
- a plurality of second extraction wirings 13d are provided so as to be respectively drawn out clockwise from the end portion to a region along one edge of the substrate (the right side in FIGS. 8 and 9) along the peripheral edge of the substrate.
- each touch detection electrode 11b is provided to be orthogonal to each touch detection electrode 11a.
- one end edge (the right side in FIG. 8) of the upper surface side first substrate 10a and the lower surface side first substrate 10b is provided at each end of the first lead wire 13c and the second lead wire 13d.
- Each of the linear connection terminals (T) is provided so as to extend along the line.
- connection terminals (T) are provided adjacent to each other as shown in FIG.
- a pair of alignment marks M for aligning the first side substrate 10a, the lower side first substrate 10b, and the second substrate 15b is one edge of the upper side first substrate 10a and the lower side first substrate 10b ( It is provided so as to be separated along the right side in FIG.
- the upper surface of the second substrate 15b is substantially L-shaped so as to be connected to the connection terminals (T) of the first lead wires 13c on the upper surface side first substrate 10a.
- a plurality of external wirings 17 are provided.
- the external wiring 17 is connected to a connection portion 17a provided so as to overlap the connection terminal (T) of the first lead-out wiring 13c, and is bent from the connection portion 17a and separated from the touch detection electrodes 11a and 11b. And a wiring portion 17b provided so as to extend in the direction in which the power supply is performed.
- the external wiring 17 is formed of a copper foil or the like constituting one conductive layer of the double-sided wiring type FPC.
- an insulating layer made of an organic resin film is provided so as to cover the wiring portion 17b of each external wiring 17.
- This insulating layer is formed of one cover film constituting a double-sided wiring type FPC.
- the lower surface of the second substrate 15b is substantially L-shaped so as to be connected to the connection terminals (T) of the respective second lead wires 13d on the lower surface side first substrate 10b.
- a plurality of external wirings 16 are provided.
- the external wiring 16 is connected to a connection portion 16a provided so as to overlap the connection terminal (T) of the second lead-out wiring 13d, and is bent from the connection portion 16a and separated from the touch detection electrodes 11a and 11b. And a wiring portion 16b provided so as to extend in the direction in which the power is applied.
- the external wiring 16 is formed of a copper foil or the like constituting the other conductive layer of the double-sided wiring type FPC.
- an insulating layer made of an organic resin film is provided so as to cover the wiring portion 16b of each external wiring 16.
- This insulating layer is formed of the other cover film constituting the double-sided wiring type FPC.
- the frame area can be made as small as possible, and the touch panel 20b is a resistive film type, so that reliable pen input is performed. be able to.
- the pair of alignment marks M are provided so as to be separated along one edge of the upper surface side first substrate 10a and the lower surface side first substrate 10b.
- the upper surface side first substrate so that the pair of alignment marks of the upper surface side first substrate 10a and the lower surface side first substrate 10b overlap with the pair of alignment marks M of the second substrate 15b provided corresponding thereto.
- the angular displacement of the second substrate 15b with respect to the upper surface side first substrate 10a and the lower surface side first substrate 10b can be suppressed, and Second substrate 15 relative to upper surface side first substrate 10a and lower surface side first substrate 10b in the direction along one edge of upper surface side first substrate 10a and lower surface side first substrate 10b.
- positional deviation of it is suppressed and short-circuit failure can be suppressed, thereby improving the production yield and product quality.
- FIG. 10 is a cross-sectional view of the mobile phone 50d of this embodiment
- FIG. 11 is a cross-sectional view of the remote control device 50e of this embodiment.
- an electronic device provided with a touch panel on the display screen is illustrated, but in this embodiment, an electronic device provided with a touch panel in addition to the display screen is illustrated.
- the mobile phone 50d includes the touch panel 20a of the first to third embodiments or the touch panel 20b of the fourth embodiment on the push dial portion of the second casing 42b. According to the mobile phone 50d, since the frame area of the touch panel 20a (20b) is small, the width of the frame area of the second casing 42b can be narrowed, and the device body can be downsized. .
- the remote control device 50e includes the touch panel 20a of the first to third embodiments or the touch panel 20b of the fourth embodiment on the touch pad portion of the housing 45 to which various operation buttons are attached.
- the remote control device 50e is configured such that various operations can be performed on a television screen, for example, by touching the surface of the touch pad portion with a finger.
- the frame area of the touch panel 20a (20b) is small, the width of the frame area of the housing 45 can be narrowed, and the device body can be downsized.
- a translucent or opaque substrate can be used as the first substrate constituting the touch panel.
- each external wiring and each lead-out wiring are bent in a region along one edge of the substrate, but the present invention is a region along one edge of the substrate. In FIG. 5, all external wirings and lead-out wirings may not be bent.
- a TFT type liquid crystal display device is exemplified as the display device.
- the present invention is a liquid crystal display device such as a DUTY type or a polysilicon type, an organic EL (electroluminescence) display device, a plasma display device, The present invention can also be applied to other display devices such as electronic paper.
- an analog capacitive touch panel and a digital resistive touch panel are exemplified, but the present invention is applied to a digital capacitive touch panel and an analog resistive touch panel.
- other touch panels such as an electromagnetic induction method, that is, touch panels that can generate input signals such as coordinate values or on / off by touching or pressing with a finger or a pen, etc. Can be applied.
- a digital camera, a mobile phone, and a remote control device are exemplified as electronic devices.
- the present invention is an electronic device such as a television, a personal computer, a portable game machine, a radio, a music tool, a DVD player, and a location information navigation tool. It can also be applied to equipment.
- the present invention is useful for various electronic devices including the touch panel.
- connection terminal 10 first substrate 10a upper surface side first substrate 10b lower surface side first substrate 10c cover substrate (first substrate) 11, 11a, 11b Touch detection electrodes 13a, 13c First lead wires 13b, 13d Second lead wires 15a, 15b Second substrates 16, 17 External wires 16a, 17a Connection portions 16b, 17b Wiring portions 20a, 20b Touch panel 30 Liquid crystal display Panel 31 Active matrix substrate 32 Counter substrate 40a to 40c Liquid crystal display device 50a Digital camera (electronic device) 50b, 50d Mobile phone (electronic equipment) 50c Electronic device 50e Remote control device (electronic device)
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Abstract
Description
図1~図5は、本発明に係るタッチパネル、表示装置及び電子機器の実施形態1を示している。具体的に図1は、本実施形態のタッチパネル20aの平面図であり、図2は、図1中のII-II線に沿ったタッチパネル20a及びそれを備えた液晶表示装置40aの断面図である。
図6は、本実施形態の電子機器50cの断面図である。なお、以下の各実施形態において、図1~図5と同じ部分については同じ符号を付して、その詳細な説明を省略する。
図7は、本実施形態の液晶表示装置40cの断面図である。
図8は、本実施形態のタッチパネル20bの平面図であり、図9は、図8中のIX-IX線に沿ったタッチパネル20bの断面図である。
図10は、本実施形態の携帯電話50dの断面図であり、図11は、本実施形態のリモコン装置50eの断面図である。
M 位置合わせマーク
T 接続端子
10 第1基板
10a 上面側第1基板
10b 下面側第1基板
10c カバー基板(第1基板)
11,11a,11b タッチ検出電極
13a,13c 第1引出配線
13b,13d 第2引出配線
15a,15b 第2基板
16,17 外部配線
16a,17a 接続部
16b,17b 配線部
20a,20b タッチパネル
30 液晶表示パネル
31 アクティブマトリクス基板
32 対向基板
40a~40c 液晶表示装置
50a デジタルカメラ(電子機器)
50b,50d 携帯電話(電子機器)
50c 電子機器
50e リモコン装置(電子機器)
Claims (15)
- 矩形状の第1基板にタッチ検出可能に設けられたタッチ検出電極と、
上記タッチ検出電極から上記第1基板の周縁に沿って該第1基板の一方の端縁に沿った領域に引き出され、該領域に接続端子が形成された引出配線と、
上記第1基板の一方の端縁に沿った領域に固定された第2基板に設けられ、上記接続端子に接続された外部配線とを備え、
上記引出配線及び外部配線を介して上記タッチ検出電極におけるタッチされた位置を検出するタッチパネルであって、
上記引出配線は、上記接続端子が上記第1基板の一方の端縁に沿って線状に形成され、
上記外部配線は、上記接続端子に重なるように設けられた接続部と、該接続部から屈曲して上記タッチ検出電極から離間する方向に延びるように設けられた配線部とを備えていることを特徴とするタッチパネル。 - 請求項1に記載されたタッチパネルにおいて、
上記第2基板は、可撓性を有する可撓性基板であることを特徴とするタッチパネル。 - 請求項1又は2に記載されたタッチパネルにおいて、
上記引出配線は、上記タッチ検出電極に対して複数本設けられ、
上記各引出配線の接続端子は、互いに隣り合うように設けられていることを特徴とするタッチパネル。 - 請求項1乃至3の何れか1つに記載されたタッチパネルにおいて、
上記引出配線は、上記タッチ検出電極に対して複数本設けられ、
上記複数本の引出配線は、上記タッチ検出電極から一方向回りに引き出された第1引出配線と、該タッチ検出電極から他方向回りに引き出された第2引出配線とにより構成されていることを特徴とするタッチパネル。 - 請求項4に記載されたタッチパネルにおいて、
上記第1引出配線の接続端子と上記第2引出配線の接続端子との間には、上記第1基板と上記第2基板とを位置合わせするための位置合わせマークが設けられていることを特徴とするタッチパネル。 - 請求項5に記載されたタッチパネルにおいて、
上記位置合わせマークは、上記第1基板の一方の端縁に沿って離間するように一対設けられていることを特徴とするタッチパネル。 - 請求項5に記載されたタッチパネルにおいて、
上記位置合わせマークは、上記第1基板の一方の端縁と垂直な方向に離間するように一対設けられていることを特徴とするタッチパネル。 - 請求項1乃至7の何れか1つに記載されたタッチパネルにおいて、
上記タッチ検出電極におけるタッチされた位置を静電容量方式により検出するように構成されていることを特徴とするタッチパネル。 - 請求項8に記載されたタッチパネルにおいて、
上記タッチ検出電極は、上記第1基板の周縁に規定された額縁領域の内側全体に矩形状に設けられていることを特徴とするタッチパネル。 - 請求項1乃至9の何れか1つに記載されたタッチパネルを備えていることを特徴とする表示装置。
- 請求項10に記載された表示装置において、
互いに対向して配置された一対の基板を備えた表示パネルを有し、
上記第1基板は、上記一対の基板の一方であることを特徴とする表示装置。 - 請求項10に記載された表示装置を備えていることを特徴とする電子機器。
- 請求項12に記載された電子機器において、
表面を保護するためのカバー基板を有し、
上記第1基板は、上記カバー基板であることを特徴とする電子機器。 - 請求項1乃至9の何れか1つに記載されたタッチパネルを備えていることを特徴とする電子機器。
- 請求項14に記載された電子機器において、
表面を保護するためのカバー基板を有し、
上記第1基板は、上記カバー基板であることを特徴とする電子機器。
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