CN203386194U - Electrode and window integrated touch screen panel and touch screen display device - Google Patents

Electrode and window integrated touch screen panel and touch screen display device Download PDF

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Publication number
CN203386194U
CN203386194U CN201320291763.7U CN201320291763U CN203386194U CN 203386194 U CN203386194 U CN 203386194U CN 201320291763 U CN201320291763 U CN 201320291763U CN 203386194 U CN203386194 U CN 203386194U
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mentioned
electrode
touch
circuit substrate
touch panel
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南成一
崔贞勋
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Melfas Inc
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Melfas Inc
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445Digitisers, 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
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/04164Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446Digitisers, 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
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/03Use of materials for the substrate
    • H05K1/0393Flexible materials
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04106Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Input By Displaying (AREA)

Abstract

The utility model provides an electrode and window integrated touch screen panel and a touch screen display device. The touch screen display device comprises an electrode layer of a double-layer structure, and mutual capacitance between electrode layers is used for identifying touch input. The electrode and window integrated touch screen is characterized by comprising a touch screen panel and a display panel, wherein a plurality of sensing electrodes are formed on the touch screen panel; a plurality of drive electrodes are formed on the display panel; drive voltage is exerted on the drive electrodes; the touch screen panel comprises a transparent window, a first circuit substrate and a touch screen control part; the sensing electrodes are formed on the single surface of the transparent window according to a preset pattern; touch input is received by one surface opposite to the single surface; the first circuit substrate is connected with the sensing electrodes; the touch screen control part is connected with the first circuit substrate. The touch input position is judged according to the change of the mutual capacitance between the drive electrodes and the sensing electrodes; the sensing electrodes are formed with the transparent window in an integrating way.

Description

Electrode-window integrated touch screen and touch panel display device
Technical field
The utility model relates to touch panel display device, relates in particular to electrode-window integrated touch screen (Touch Screen Panel) and comprises the touch panel display device of this touch panel.
Background technology
Usually, touch-screen is as one of input media that forms interface between the information communication device utilizing various displays and user, be a kind of user by utilizing the input tools such as hand or pen directly to contact picture, carry out more easily the technology of input operation.
Touch panel is as being attached to liquid crystal display (LCD, Liquid Cristal Display), organic luminescent device (OLED, Organic Light Emitting Device) etc. display panel (Display Panel), for detection of the input block of user's input, can be divided into resistance membrane type, condenser type, ultrasonic type, infrared-type etc. according to working method.
Wherein, capacitive touch screen panel thin thickness, permanance be outstanding, have multi-touch function, due to these advantages, take in recent years mobile device as main, and its application enlarges increasingly.Capacitive touch screen can be divided into following two kinds: a kind of is not apply separately the driving signal, utilizes the self-capacitance (Self-Capacitance) generated between contact object and sensing electrode to judge the mode of contact input; Another kind is the driving signal that applies regulation, utilizes the mutual capacitance (Mutual-Capacitance) generated between a plurality of sensing electrodes by the contact object to judge the mode of contact input.
Utilize the mode of self-capacitance, line construction is simple, and easily realizes, but has the shortcoming that is difficult to realize the multiple point touching judgement.On the contrary, utilize the mode of mutual capacitance, aspect the multiple point touching judgement, be better than utilizing the mode of self-capacitance, but because needs are realized with double-decker, the shortcoming that exists thickness to increase.And, the touch-screen with double-deck mutual capacitance mode, because operation increases, than the touch-screen with single layer structure, the problem that exists manufacturing cost to increase.And, only with the electrode layer of single layer structure, realize that the electrode pattern correlative study of the effect of double-deck electrode layer is continuing to carry out in recent years in utilizing the mode of mutual capacitance.But this structure need to form two electrode layers in a layer, need comparatively complicated operation, and cause yield rate to reduce.
Fig. 1 means the general stepped construction with double-deck touch panel.General have double-deck touch panel 100 and comprise transparent window 110, be formed at first electrode layer 130 of single face of transparent window 110 and the second electrode lay 140 that is formed at the single face of the first electrode layer 130.Usually, the first electrode layer 130 consists of with the first electrode 132 of the single face that is formed at hyaline membrane 131 hyaline membrane 131 of polyethylene terephthalate (PET, Polyethylene Terephthalate) etc.; The second electrode lay 140 consists of with the second electrode 142 that is formed at the single face of hyaline membrane 141 hyaline membrane 141 of polyethylene terephthalate etc.This touch panel, than the touch panel with single layer structure, its stacked thickness increases, and manufacturing process also can increase.
Usually, touch panel is usingd polyethylene terephthalate etc. as base material, utilize optical lens gelatin (OCA, Optical Clear Adhesive) tack coat (not shown) such as, the independently electrode layer 130,140 that single face is formed with to electrode is attached to transparent window 110, completes thus manufacture.But, in the film 130,140 that utilizes tack coat will be formed with electrode is attached to the operation of transparent window 110, be easy to occur that bubble, cut, impurity etc. are various bad.The above-mentioned operation of adhering to itself is exactly expensive operation, and, because also there is quite high disqualification rate in this operation, causes the operation yield rate of touch panel to reduce, and then cause the rise in price of touch panel.And, in order to reduce disqualification rate in adhering to operation, comprise in the situation of in advance transparent window being carried out the additional process such as surface treatment, also can cause extra cost to increase.
The utility model content
The purpose of this utility model is to provide a kind of touch panel display device of realizing utilizing the touch-screen input mode of mutual capacitance without complicated operation reduces thickness.
In order to achieve the above object, according to an embodiment of the present utility model, the utility model provides a kind of touch panel display device, comprise double-deck electrode layer, and utilize the mutual capacitance (Mutual-Capacitance) between each layer of electrode to identify the touch input, and it is characterized in that, comprising: touch panel, be formed with a plurality of sensing electrodes and display panel, be formed with a plurality of drive electrodes that are applied in driving voltage; Above-mentioned touch panel comprises: transparent window, and single face forms sensing (Sensing) electrode with predefined pattern, by with above-mentioned single face one side in opposite directions, accepting to touch input; The first circuit substrate, be connected with above-mentioned sensing electrode, and the touch-screen control part, with above-mentioned the first circuit substrate, is connected, and by the variation of the mutual capacitance between above-mentioned drive electrode and above-mentioned sensing electrode, judges the position of above-mentioned touch input; Above-mentioned a plurality of sensing electrode and transparent window are integrally formed.
Of the present utility model being characterised in that, above-mentioned a plurality of sensing electrodes are connected with above-mentioned a plurality of drive electrodes by the first circuit substrate.
Of the present utility model being characterised in that, above-mentioned the first circuit substrate is flexible printed circuit substrate (Flexible Printed Circuit Board).
Of the present utility model being characterised in that, above-mentioned the first circuit substrate is installed or be connected in to above-mentioned touch-screen control part.
Of the present utility model being characterised in that, above-mentioned the first circuit substrate comprises communication line, is connected in display control unit or the micro controller unit be connected with the second circuit substrate of above-mentioned display panel by above-mentioned communication line.
Of the present utility model being characterised in that, above-mentioned touch-screen control part is from above-mentioned display panel by above-mentioned the first circuit substrate receiving synchronous information, and this synchronizing information is for making applying of the driving voltage that puts on above-mentioned a plurality of drive electrodes constantly constantly corresponding with the sensing of above-mentioned sensing electrode.
Of the present utility model being characterised in that, above-mentioned the first circuit substrate comprises the first channel for transmitting above-mentioned synchronizing information and the second channel of the touch input message that calculated by above-mentioned touch-screen control part for transmission.
Of the present utility model being characterised in that, above-mentioned sensing electrode forms along the first direction of principal axis, and above-mentioned drive electrode forms along the second direction of principal axis, and above-mentioned the first direction of principal axis intersects mutually with above-mentioned the second direction of principal axis.
Of the present utility model being characterised in that, above-mentioned display panel comprises: first substrate is formed with the image displaying part that comprises a plurality of thin film transistor (TFT)s and light-emitting component; Base plate for packaging (Encapsulation Substrate), be formed on above-mentioned first substrate, and for encapsulating above-mentioned image displaying part, the single face of this base plate for packaging is formed with a plurality of drive electrodes that are applied in driving voltage; Light polarizing film, be formed on above-mentioned base plate for packaging; The second circuit substrate, be connected with above-mentioned drive electrode; And display control unit, with above-mentioned second circuit substrate, be connected, apply driving voltage to above-mentioned drive electrode.
Of the present utility model being characterised in that, above-mentioned a plurality of drive electrodes are formed at the upper surface of above-mentioned base plate for packaging, and above-mentioned light polarizing film is formed at the upper surface of above-mentioned drive electrode.
Of the present utility model being characterised in that, above-mentioned a plurality of drive electrodes are formed at the lower surface of above-mentioned base plate for packaging.
Of the present utility model being characterised in that forms light polarizing film between above-mentioned drive electrode and above-mentioned sensing electrode.
According to another embodiment of the present utility model, the utility model provides a kind of electrode-window integrated touch screen, it is characterized in that, comprise: transparent window, single face forms a plurality of sensing electrodes with predefined pattern, accept to touch input by the one side contrary with above-mentioned single face, the first circuit substrate, with above-mentioned a plurality of sensing electrodes, be connected, and touch-screen control part, with above-mentioned the first circuit substrate, be connected, above-mentioned a plurality of drive electrodes by being applied in driving voltage and the variation of the mutual capacitance between above-mentioned sensing electrode, judge the position of above-mentioned touch input, above-mentioned a plurality of sensing electrode and above-mentioned transparent window are integrally formed, display panel is attached to the lower surface of above-mentioned touch panel, and above-mentioned a plurality of drive electrodes are formed at the single face of the base plate for packaging of above-mentioned display panel.
According to another embodiment of the present utility model, the utility model provides a kind of touch panel display device, comprise double-deck electrode layer, and utilize the mutual capacitance between each layer of electrode to identify the touch input, it is characterized in that, comprising: touch panel is formed with a plurality of sensing electrodes, and display panel, be formed with a plurality of drive electrodes that are applied in driving voltage; Form light polarizing film between above-mentioned a plurality of sensing electrodes and a plurality of drive electrode.
According to the utility model, in the touch panel that utilizes the mutual capacitance mode, will be for detection of the direct patterning of the sensing electrode of mutual capacitance (Patterning) single face at transparent window, make sensing electrode and transparent window integrally formed.Thus, be omitted in the operation of adhering between the film that is formed with electrode that in touch panel manufacturing process, disqualification rate is higher and window, thereby simplify manufacturing process, can improve yield rate, can also reduce the production cost of touch panel, reduce the thickness of the electronic equipment of applicable touch panel simultaneously.
And, according to the utility model, sensing electrode is integrally formed at the single face of the transparent window of touch panel, be formed at the single face of the base plate for packaging (Encapsulation Substrate) of display panel for the drive electrode that applies driving voltage.Thus, as double-deck touch panel, because of electrode layer, do not cause thickness to increase or, without complicated operation, can realize utilizing the input mode of mutual capacitance yet.
The accompanying drawing explanation
Fig. 1 means the figure of the stepped construction with double-deck general touch panel.
Fig. 2 means the sketch of structure of the touch panel display device of an embodiment of the present utility model.
Fig. 3 means the figure of stepped construction of the touch panel of an embodiment of the present utility model.
Fig. 4 means the figure of form of the first electrode of an embodiment of the present utility model.
Fig. 5 means the figure of stepped construction of the display panel of an embodiment of the present utility model.
Fig. 6 means the figure of form of the second electrode of an embodiment of the present utility model.
Fig. 7 means the sketch of structure of the touch panel display device of another embodiment of the present utility model.
Embodiment
Hereinafter with reference to accompanying drawing and embodiment of the present utility model, to forming device of the present utility model and method of work, be elaborated.In following explanation, the concrete specific items such as composed component will be mentioned, this provides in order to help to understand the utility model more all sidedly, this specific item can be implemented certain distortion or change in scope of the present utility model, and this it will be apparent to those skilled in the art that.And, in the process that the utility model is described, as thought, the public technology relevant with the utility model is relevant illustrates and may cause unnecessary obscuring to main idea of the present utility model, will omit relevant illustrating.
In the utility model instructions full text, for same or similar structure member, will use identical Reference numeral.And, in the accompanying drawings, for convenience of explanation, size and the thickness of each structure is shown at random, but the utility model is not so limited.And, in the accompanying drawings, in order clearly to show each layer and zone, thickness has been carried out amplifying demonstration.
And, when be expressed as layer, film, zone, plate etc. partly be positioned at other parts " top " or " on " time, it not only be included in other parts " directly over " situation, also have the situation of other parts in the middle of also comprising simultaneously.But when be expressed as certain part be positioned at other parts " directly over " time, there is no other parts in the middle of meaning.
Fig. 2 means the sketch of structure of the touch panel display device of an embodiment of the present utility model.With reference to Fig. 2, the touch panel display device 10 of an embodiment of the present utility model comprises: display panel 200, and viewing area has a plurality of pixels, for show image; And touch panel 100, be disposed at the place ahead of display panel 200, as input media performance function.
Touch panel 100 realize to touch input with capacitive way, comprising: transparent window substrate 110, with the integrally formed mode of sensing electrode, to be formed on the single face of touch panel 100; And first flexible printed circuit substrate (FPCB, Flexible Printed Circuit Board) 120, with a side end of transparent window substrate 110, be connected.
Transparent window 110 is configured for detecting at upper surface the input face that touches reaction, the input area of input and the transparency electrode (not shown) formed with random pattern at above-mentioned input area are carried out in the touch be formed with by the user at this input face, also are formed with lamella 190 for the subregion from visually shielding transparent window 110, for connecting first wiring part (not shown) of transparency electrode and the first flexible printed circuit substrate 120.Above-mentioned lamella 190 adopts the whole bag of tricks such as printings, evaporation, sputter, coating to be disposed at the surface of transparent window 110, or adopts the method such as technique in mould to be disposed at the inside of transparent window 110.Usually, wiring part is positioned at the bottom of the part that is formed with lamella 190, by input face, to the user from visually the shielding.
Connect or touch-screen control part 170 is installed at the first flexible printed circuit substrate 120, at a side end of the first flexible printed circuit substrate 120, being formed with the communication line 121 for communicating with display panel 200.End at communication line 121 is provided with the connecting portion 122 for being connected with display panel 200.
The first flexible printed circuit substrate 120 comprises touch-screen control part 170.Touch-screen control part 170 utilizes usually from the electric analoging signal of touch panel 100 transmission, calculate the positional information that the user touches, and by the communication line 121 of the first flexible printed circuit substrate 120, calculated positional information is transferred to display panel 200.
Display panel 200 comprises the first substrate 210 that is formed with image displaying part and the second substrate 250 that fits in first substrate 210.Second substrate 250 can be the base plate for packaging of encapsulation first substrate.Than second substrate 250, first substrate 210 forms widelyr and gives prominence to, and at outshot, is electrically connected with the second flexible printed circuit substrate 290.The second flexible printed circuit substrate 290 comprises the display control unit 280 for driving display panel 200, also can comprise for the plate electrode to scanner driver and data driver transmission of electric signals (pad electrodes) (not shown).Above-mentioned display control unit 280 can be general LDI(LCD Drive IC, LCD drive integrated circuit).
Display control unit 280 carries out physical connection with the communication line 121 of touch panel 100, with touch panel 100 executive communications.In addition, in an embodiment of the present utility model, touch panel 100 carries out physical connection by the connecting portion 122 of communication line 121 with display control unit 280, but touch panel 100 is not limited by this with the connected mode of display panel 200, comprise and utilize the connection that can transmit any mode of electric signal as the independently linkage unit of splicing ear etc.
In addition, in the touch panel display device 10 of an embodiment of the present utility model, in conjunction with touch panel 100 and display panel 200 time, can utilize the bonding schemes such as optical lens gelatin or ultraviolet resin (UV Resin).
Fig. 3 means the figure of the touch panel stepped construction of an embodiment of the present utility model.With reference to Fig. 3, the touch panel 100 of the present embodiment comprises transparent window 110, with the one-piece type single face of transparent window 110 the first electrode 132 formed with the shape patterning of stipulating of being formed at, the first wiring part 150 be connected with the first electrode 132, for the anisotropic conductive film 160 in conjunction with the first wiring part 150 and the first flexible printed circuit substrate 120, be attached to the first flexible printed circuit substrate 120 of transparent window 110 by anisotropic conductive film 160, calculate the touch-screen control part 170 of the input position of touch panel by the variation that detects the mutual capacitance generated between the first electrode 132 and the second electrode 142 described later.The first flexible printed circuit substrate 120 can be attached to the first wiring part 150 according to anisotropic conductive film operation of utilizing anisotropic conductive film 160 etc.
Transparent window 110 can be outstanding by transmittance the high-strength material such as glass, acryl resin or applicable to the polyethylene terephthalate (PET of flexible display etc., polyethylene terephthalate), polycarbonate (PC, polycarbonate), polyethersulfone (PES, polyether sulfone), polyimide (PI, polyimide), the material such as polymethylmethacrylate (PMMA, PolyMethly MethaAcrylate) forms.Transparent window 110 plays the effect of the profile of the input part that keeps touch panel 100, and expose at least a portion zone, accommodates the contact of the conductive object such as user's health or writing pencil.And; though omit in Fig. 3; but transparent window 110 also can comprise the lamella (not shown) for the part zone from visually shielding transparent window 110, for damage or the destruction of the transparent window 110 that prevents from causing because of contact, optionally add protective seam (not shown).
As a reference, term " contact " or " touch " used in this specification, not only refer to and the direct contact that contacts the face of accommodating, and broadly instruct electrical object to approach contact with sizable distance and accommodate face.That is, touch panel of the present utility model or the touch panel display device that this touch panel is installed should be interpreted as having the contact that can identify conductive object or can identify panel or the device of sizable distance with the function of interior proximity.
First electrode 132 integrally formed with transparent window 110 is connected with the first wiring part 150.The first wiring part 150 can utilize the metallics such as the outstanding copper of conductance (Cu), silver (Ag), molybdenum (Mo) or form with the transparent conductivity materials such as the same or similar tin indium oxide of material (ITO) that form the first electrode 132.Can form according to methods such as etchings as the first electrode 132, the first wiring parts 150, in this case, form the operation of the first electrode 120 and the order of the operation that forms the first wiring part 150, can select at random according to the operation characteristic.And, can comprise silver-colored electroconductive paste printing by method utilizations such as serigraphys and form the first wiring part 150, in this case, preferably, at first form sensing electrode 132, then form the first wiring part 150.
The touch-screen control part 170 of the first flexible printed circuit substrate 120 that the first wiring part 150 forms with at least one end at touch panel 100 is connected, and the capacitance variations related information transmission that will occur from the first electrode 132 is to touch-screen control part 170.In while, on the object contact transparent windows 110 such as user's health or writing pencil and between the first electrode 132 and the second electrode 142, capacitance variations occurring, capacitance variations transfers to touch-screen control part 170 along the first wiring part 150 be connected with the first electrode 132, touch-screen control part 170 is by capacitance variations, judges the quantity of contact input and contact position etc.
Fig. 4 means the figure of form of the first electrode of an embodiment of the present utility model.With reference to Fig. 4, the first electrode 132 is formed at the single face of transparent window 110.The first electrode 132 is by transmittance and the outstanding tin indium oxide (ITO of conductance, indium-tin oxide), indium zinc oxide (IZO, indium zinc oxide) or zinc paste (ZnO, zinc oxide) etc. material forms, in order to judge quantity and the contact position of the contact input on transparent window 110, with the shape patterning of regulation.With reference to Fig. 4, the first electrode 132 of an embodiment of the present utility model forms with the shape of the first axial straight line form.
In the touch panel 100 shown in Fig. 4, supposed that a plurality of the first electrodes 132 form with the first axial straight line or square shape patterning, but also can be by being more suitable for judging that other various shape patternings of contact position etc. form.For example, the first electrode 132 forms with first axial a plurality of rectilinear forms, additionally, assigned position on each straight line, along the direction with above-mentioned the first direction of principal axis quadrature, add the straight line of predefined length, form with the form that comprises a plurality of branches of intersecting with the first axial straight line.And this branch can form with various directions, length and quantity.
In the present embodiment, the first electrode 132 is with on the one-piece type single face that is formed at transparent window 110.On transparent window 110 directly by the first electrode 132 patternings, and be connected with the first wiring part 150, manufacture touch panel 100, can be omitted in independently and form the first electrode 132 on substrate, and utilize the bonding materials such as optical lens gelatin to carry out the operation of adhering to of adhesive electrodes layer and transparent window 110, for example, can omit the lamination operation.Usually, form surface pattern by omitting the tin indium oxide that will be formed with at the single face of pet resin etc. the tin indium oxide membrane material of tin indium oxide, and the tin indium oxide membrane material of patterning is attached to the operation of adhering to of the transparent windows such as acrylic acid, eliminate contingent defective factor in adhering to operation, can significantly promote the yield rate of operation.Therefore, in this specification, the expression of " with one-piece type " or " integrally formed ", mean not with optical lens gelatin etc. independently tack coat make the first electrode 132 be formed on the single face of transparent window 110.
That is, mean to be not included in all methods of adhering to operation that in the process that forms the first electrode 132, the first electrode 132 are attached to transparent window.And, sensing electrode 120 " directly " is formed at transparent window 110, not only refer to sensing electrode 120 directly is patterned in the situation of the single face exposed of transparent window 110, also comprise and form the situation of sensing electrode 120 with said method on the face of the transparent window 110 that is coated with the independent stratums such as anti-scattered film, transparent resin.
And, as an embodiment, the tin indium oxide coating glass (ITO coated glass) that single face at least can be coated with to tin indium oxide is applicable to the touch panel 100 of the present embodiment.In this case, by the tin indium oxide patterning that will be coated on glass substrate, form the first electrode 132, and this glass substrate is used as to transparent window 110, thereby be attached to independently window without the tin indium oxide membrane material by patterning.Thus, the yield rate of the manufacturing process of touch panel 100 not only can be improved, the thickness of touch panel 100 can also be reduced simultaneously.
Fig. 5 means the figure of stepped construction of the display panel of an embodiment of the present utility model.With reference to Fig. 5, the display panel 200 of an embodiment of the present utility model is as Organic Light Emitting Diode (Organic Light Emitting Diode) display panel, comprise the first substrate 210 that is formed with image displaying part, the top that is formed at first substrate 210 and for the base plate for packaging (Encapsulation substrate) of the image displaying part encapsulation that will be formed at above-mentioned first substrate 210 be second substrate 250, the conduct that is formed at the single face of above-mentioned second substrate 250 touches the second electrode 142 of the drive electrode of input for the mutual capacitance mode.
The image displaying part formed on above-mentioned first substrate 210 comprises a plurality of thin film transistor (TFT)s 230 and a plurality of light-emitting component 240.That is, form successively cushion 211 and semiconductor layer 220 on above-mentioned first substrate 210, form gate insulating film 212, gate electrode 231, interlayer dielectric 213, source/drain electrodes 232 and diaphragm 214 on semiconductor layer 220.Now; above-mentioned thin film transistor (TFT) 230 consists of above-mentioned semiconductor layer 220, gate electrode 231, source/drain electrodes 232 etc.; form light-emitting component 240 on thin film transistor (TFT) 230, this light-emitting component 240 is electrically connected to thin film transistor (TFT) 230 by the connecting hole (not shown) that is formed at diaphragm 214.Above-mentioned light-emitting component 240 comprises positive electrode 241, luminescent layer 242 and negative electrode 243.Be formed with pixel definition film 215 on the positive electrode 241 of light-emitting component 240 and diaphragm 214.
And, be formed with second substrate 250 on the image displaying part that comprises above-mentioned thin film transistor (TFT) 230 and light-emitting component 240, come and above-mentioned first substrate 210 together packaging film transistor 230 and light-emitting component 240.Now, first substrate 210 is with second substrate 250 by encapsulating material 216 encapsulation, and above-mentioned second substrate 250 can be realized by having the insulated substrates such as transparent glass, acryl resin or plastic material.Can be provided for absorbing the transparent hygroscopic agent (not shown) of moisture residual between second substrate 250 and first substrate 210 in the bottom surfaces of above-mentioned second substrate 250.
The utility model one embodiment, is characterized in that, is formed with the drive electrode (Tx electrode) for the input of mutual capacitance mode touch-screen on above-mentioned second substrate 250.
That is, in the situation that the embodiment shown in Fig. 5, the second electrode 142 is formed on second substrate 250, is formed with the second wiring part 270, the second wiring parts 270 and is connected with display control unit 280 on the Huo Ge limit, angle of the second electrode 142.
And, comprise on the second substrate 250 of above-mentioned the second wiring part 270 and be formed with light polarizing film 260.Light polarizing film 260 has flexibility (flexible), carries out the function that the light from external irradiation is screened and sees through.
That is, touch panel display device of the present utility model is realized with the touch-screen input mode of mutual capacitance mode,, detects the variation that puts on the electric capacity of sensing electrode (the first electrode) 132 when change occurs the level of above-mentioned driving voltage that is, detects touch location.
Thus, in the utility model, will as the drive electrode of the sender electrode (Tx electrode) of touch panel 100 the second electrode 142 be formed at the single face of the second substrate 250 of display panel, to be that the first electrode 132 is integrally formed with the transparent window 110 of touch panel as the sensing electrode of receiving electrode (Rx electrode), than conventional art, can be in the situation that do not increase the touch panel that thickness is realized double-deck mutual capacitance mode.And, when manufacturing touch panel, only need to form sensing electrode 132, make the electrode structure of touch panel 100 simple, filming process reduces, thus operation becomes simply, and throughput rate also is improved.
In addition, in an embodiment of the present utility model, display panel 200 is organic electroluminescence display panel, but display panel can show that the display panel of any type of image substitutes by transparency carriers such as base plate for packaging.For example, display panel 200 can be display panels (Liquid Crystal Display Panel), electrophoretic display panel (Electrophoretic Display Panel), the LED panel, inorganic EL display panel (Electro Luminescent Display Panel), Field Emission Display panel (Field Emission Display Panel), Surface-conduction Electron-emitter Display panel (Surface-conduction Electron-emitter Display Panel), Plasmia indicating panel (Plasma Display Panel), cathode-ray tube (CRT) (Cathode Ray Tube) display panel.
Fig. 6 means the figure of form of the second electrode of an embodiment of the present utility model.Similar to the first electrode 132, the second electrode 142 can be formed by transmittance and the outstanding materials such as tin indium oxide (ITO, indium-tin oxide), indium zinc oxide (IZO, indium zinc oxide) or zinc paste (ZnO, zinc oxide) of conductance.With reference to Fig. 6, the second electrode 142 comprises a plurality of electrode patterns, and above-mentioned a plurality of electrode patterns can be formed on the second axial extended line.
Form each pattern of the second electrode 142, basically can be with square morphosis.Especially, the second electrode 142 of an embodiment of the present utility model can form with narrower width on the position corresponding with the first electrode 132.
The second direction of principal axis of an embodiment of the present utility model can intersect with the first direction of principal axis of the first electrode 132, and as an example, the first direction of principal axis of an embodiment of the present utility model and the second direction of principal axis can mutually orthogonal (orthogonal).
A plurality of electrode patterns that form the second electrode 142 of an embodiment of the present utility model can comprise at least two above electrode surfaces by the width size discrimination.As concrete example, a plurality of electrode patterns that form the second electrode 142 of an embodiment of the present utility model can comprise two electrode surfaces by two different width distinguishings.Particularly, forming more than 142 electrode pattern of the second electrode can be by the electrode surface morphosis repeatedly of relatively wide electrode surface and relative narrower.
The first electrode 132 and the second electrode 142 form electrical short (short), can form by etched portions face on the electrode considering the identical material of resistance.
The second wiring part 270 can utilize the metallics such as the outstanding copper of conductance (Cu), silver (Ag), molybdenum (Mo) or form with the transparent conductivity materials such as the same or similar tin indium oxide of material (ITO) that form the second electrode 142.Can form by methods such as etchings as the second electrode 142, the second wiring parts 270, in this case, form the operation of the second electrode 142 and the order of the operation that forms the second wiring part 270, can select at random according to the operation characteristic.And, can comprise that silver-colored electroconductive paste printing forms the second wiring part 270 by method utilizations such as serigraphys, in this case, preferably, at first form the second electrode 142, then form the second wiring part 270.
Each electrode pattern that forms the second electrode 142 is connected with display control unit 280 by the second wiring part 270.Display control unit 280 can be worked as follows, that is, generate and drive signal, and drive signal to each electrode pattern transmission that forms the second electrode 142 according to this
In an embodiment of the present utility model, the first electrode 132 can be interpreted as detecting according to the principle of driving-sensing (Driving-Sensing) sensing (Sensing) electrode of multiple point touching, and, the second electrode 142 can be interpreted as being applied in driving (Driving) electrode that drives signal.
Particularly, at least one electrode of the first electrode 132 and the second electrode 142 can comprise a plurality of electrode patterns.The second electrode 142 is formed by a plurality of electrode patterns, can apply the driving signal to each electrode pattern successively.Now, can be judged as and only have the electrode pattern that is applied in the driving signal to be activated, be not applied to and drive the electrode pattern of signal to be activated.Along with the generation touched, the partial electrode pattern in a plurality of electrode patterns of the first electrode 132 responds the activation of the second electrode 142, can detect the variation of mutual capacitance.Now, on the point of crossing of the first electrode 132 be activated and the second electrode 142, the mutual capacitance that touches generation area can be detected and change.
Particularly, at first, not providing under the state that touches input, between the first electrode 132 and the second electrode 142, form mutual capacitance (Cm).Now, mutual capacitance (Cm) is only in the situation that apply driving voltage to the second electrode 142 and form, and not only is that the second electrode 142 and the first electrode 132 directly overlapping zone generate electric field line, also generate electric field line in the zone that is formed with each electrode comprehensively.
If apply the driving voltage that exchanges form to the second electrode 142, in the moment of the level of above-mentioned driving voltage change (rise constantly and descend constantly), the capacitive coupling effect occurs, the voltage of the first electrode 132 also correspondingly changes with the voltage variety of above-mentioned driving voltage.Now, the corresponding voltage of mutual capacitance (Cm) produced along with to the second electrode 142, applying driving voltage, detected by touch-screen control part 170 by the first wiring part 150 be connected with each first electrode 132.
In addition, when the finger that has contacted the people etc. can cause the touch input unit of capacitance variations, touching place, the electric field line conductively-closed between the second electrode 142 and the first electrode 132, the variation of generation mutual capacitance.Touch input unit is preferably to have and can fully causes the volume of capacitance variations and the object of contact area.Especially, people's finger, as the low resistance object, has AC capacitor C 1 from the first electrode 132 to health, and health has the self-capacitance of the relative ground connection of about 200pF, is far longer than above-mentioned C1.Thus, when the touching such as finger, in the situation that touch place, shield the electric field line between the second electrode 142 and the first electrode 132, above-mentioned electric field line via the capacitance path of inherence in finger and health to the ground connection difference.Thus, do not providing under the normal condition that touches input, mutual capacitance (Cm) reduces C1(Cm1=Cm-C1).
The variation of this mutual capacitance, the final change puts on the voltage that is positioned at the first electrode 132 that touches place.Thus, in the moment of the level of the driving voltage that puts on the second electrode 142 change, the touch-screen control part 170 be connected with each first electrode 132 is measured the voltage of the first electrode 132, detect the variation of mutual capacitance, thus can judge touch input generation whether and the absolute position in zone that at least more than one touch occurs.
So, the touch panel display device 10 of an embodiment of the present utility model, realize the touch panel 100 of mutual capacitance mode in order to utilize the driving voltage that exchanges form, should occur the moment of change at driving voltage, detects the capacitance variations of each first electrode 132.Thus, should make the sensing signal by the above-mentioned capacitance variations of the first electrode 132 detection change constantly corresponding with driving voltage.Therefore, be necessary to make the action moment of sensing signal and applying constantly synchronously of driving voltage, so that the moment execution sensing of change to occur at driving voltage.
Thus, an in the situation that embodiment of the present utility model, in order to make applying constantly of driving voltage, with sensing, constantly synchronize, by display control unit 280 generate comprise to driving voltage apply constantly and/or information that change is constantly relevant in interior synchronizing information, and by communication line 120, generated synchronizing information is transferred to touch-screen control part 170.And, except display control unit 280, the circuit that also can realize separately by micro controller unit etc. or chip or external structure generate above-mentioned synchronizing information, and are transferred to touch-screen control part 170 by the first flexible printed circuit substrate 120.
Display control unit 280, according to being included in applying constantly of driving voltage in synchronizing information, applies the driving signal to the second electrode 142 successively, and touch-screen control part 170 is carried out sensing according to received synchronizing information.This synchronizing information can be utilized for the I2C(I-square-C communicated by letter between chip and chip) agreement completes transmission.In addition, the particular moment that synchronizing information can all can be known with touch-screen control part 170 or display control unit 280 is as the criterion, and independently sets in advance.
Fig. 7 means the sketch of structure of the touch panel display device of another embodiment of the present utility model.In another embodiment of the present utility model, the communication line of touch panel 100 consists of two channels 121,123.The first channel 121 of communication line is transferred to touch-screen control part 170 for comprising to the constantly relevant information that applies of driving voltage in interior synchronizing information, and the second channel 123 of communication line is transferred to display control unit 280 or external structure for the touch input message that will be calculated by touch-screen control part 170.For example, the touch input message can be transferred to the master controller of the mobile device that comprises touch panel display device 100 by second channel 123.
Each channel 123(at above-mentioned communication line is not shown) end be formed with the connecting portion 124 for physical connection, the second channel 123 of above-mentioned communication line is connected with the master controller of mobile device by above-mentioned display control unit 280 or by the display control unit 280 that micro controller unit (not shown) forms, or via display control unit 280 or micro controller unit, with master controller, is not connected.
And, as an example, for driving the touch-screen control part 170 of touch panel 100, be provided for the sensing signal of sensing the first electrode 132 simultaneously and, for apply the signal of driving voltage to the second electrode 142, carry out the input service of touch panel.
And the driving frequency of touch panel 100 can wait diversely change constantly by change sensing number of times or sensing.For example, to provide sensing signal with the rising moment of driving voltage and the mode of constantly synchronizeing that descends respectively, can drive more at high speed touch panel 100, the rising moment of every driving voltage or the decline of driving voltage are constantly, synchronous sensing signal all is provided, drives touch panel 100.
More than the electrode-window integrated touch screen of an embodiment of the present utility model and the structure that comprises the touch panel display device of this touch panel, in addition, in above-mentioned the utility model related description, specific embodiment is illustrated, but only otherwise exceed scope of the present utility model, can implement various distortion.

Claims (18)

1. a touch panel display device, comprise double-deck electrode layer, and utilize the mutual capacitance between each layer of electrode to identify the touch input, it is characterized in that,
Comprise:
Touch panel, be formed with a plurality of sensing electrodes, and
Display panel, be formed with a plurality of drive electrodes that are applied in driving voltage;
Above-mentioned touch panel comprises:
Transparent window, single face forms sensing electrode with predefined pattern, by with above-mentioned single face one side in opposite directions, accepting to touch input,
The first circuit substrate, be connected with above-mentioned sensing electrode, and
The touch-screen control part, be connected with above-mentioned the first circuit substrate, by the variation of the mutual capacitance between above-mentioned drive electrode and above-mentioned sensing electrode, judges the position of above-mentioned touch input;
Above-mentioned a plurality of sensing electrode and transparent window are integrally formed.
2. touch panel display device according to claim 1, is characterized in that, above-mentioned a plurality of sensing electrodes are connected with above-mentioned a plurality of drive electrodes by the first circuit substrate.
3. touch panel display device according to claim 1, is characterized in that, above-mentioned the first circuit substrate is flexible printed circuit substrate.
4. touch panel display device according to claim 1, is characterized in that, above-mentioned the first circuit substrate is installed or be connected in to above-mentioned touch-screen control part.
5. touch panel display device according to claim 1, it is characterized in that, above-mentioned the first circuit substrate comprises communication line, is connected in display control unit or the micro controller unit be connected with the second circuit substrate of above-mentioned display panel by above-mentioned communication line.
6. touch panel display device according to claim 1, it is characterized in that, above-mentioned touch-screen control part is from above-mentioned display panel by above-mentioned the first circuit substrate receiving synchronous information, and this synchronizing information is for making applying of the driving voltage that puts on above-mentioned a plurality of drive electrodes constantly constantly corresponding with the sensing of above-mentioned sensing electrode.
7. touch panel display device according to claim 6, is characterized in that, above-mentioned the first circuit substrate comprises the first channel for transmitting above-mentioned synchronizing information and the second channel of the touch input message that calculated by above-mentioned touch-screen control part for transmission.
8. touch panel display device according to claim 1, is characterized in that, above-mentioned sensing electrode forms along the first direction of principal axis, and above-mentioned drive electrode forms along the second direction of principal axis, and above-mentioned the first direction of principal axis intersects mutually with above-mentioned the second direction of principal axis.
9. touch panel display device according to claim 1, is characterized in that, above-mentioned display panel comprises:
First substrate, be formed with the image displaying part that comprises a plurality of thin film transistor (TFT)s and light-emitting component;
Base plate for packaging, be formed on above-mentioned first substrate, and for encapsulating above-mentioned image displaying part, the single face of this base plate for packaging is formed with a plurality of drive electrodes that are applied in driving voltage;
Light polarizing film, be formed on above-mentioned base plate for packaging;
The second circuit substrate, be connected with above-mentioned drive electrode; And
Display control unit, be connected with above-mentioned second circuit substrate, to above-mentioned drive electrode, applies driving voltage.
10. touch panel display device according to claim 9, is characterized in that, above-mentioned a plurality of drive electrodes are formed at the upper surface of above-mentioned base plate for packaging, and above-mentioned light polarizing film is formed at the upper surface of above-mentioned drive electrode.
11. touch panel display device according to claim 9, is characterized in that, above-mentioned a plurality of drive electrodes are formed at the lower surface of above-mentioned base plate for packaging.
12. touch panel display device according to claim 1, is characterized in that, between above-mentioned drive electrode and above-mentioned sensing electrode, forms light polarizing film.
13. electrode-window integrated touch screen, is characterized in that,
Comprise:
Transparent window, single face forms a plurality of sensing electrodes with predefined pattern, by the one side contrary with above-mentioned single face, accepts to touch input,
The first circuit substrate, be connected with above-mentioned a plurality of sensing electrodes, and
The touch-screen control part, be connected with above-mentioned the first circuit substrate, and the above-mentioned a plurality of drive electrodes by being applied in driving voltage and the variation of the mutual capacitance between above-mentioned sensing electrode judge the position of above-mentioned touch input;
Above-mentioned a plurality of sensing electrode and above-mentioned transparent window are integrally formed;
Display panel is attached to the lower surface of above-mentioned touch panel, and above-mentioned a plurality of drive electrodes are formed at the single face of the base plate for packaging of above-mentioned display panel.
14. electrode according to claim 13-window integrated touch screen, it is characterized in that, above-mentioned the first circuit substrate comprises communication line, is connected in display control unit or the micro controller unit be connected with the second circuit substrate of above-mentioned display panel by above-mentioned communication line.
15. electrode according to claim 14-window integrated touch screen, it is characterized in that, above-mentioned touch-screen control part is from above-mentioned display panel or micro controller unit by above-mentioned the first circuit substrate receiving synchronous information, and above-mentioned synchronizing information is for making applying of the driving voltage that puts on above-mentioned a plurality of drive electrodes constantly constantly corresponding with the sensing of above-mentioned sensing electrode.
16. electrode according to claim 13-window integrated touch screen, it is characterized in that, above-mentioned the first circuit substrate comprises the first channel for transmitting above-mentioned synchronizing information and the second channel of the touch input message that calculated by above-mentioned touch-screen control part for transmission.
17. electrode according to claim 13-window integrated touch screen, it is characterized in that, above-mentioned sensing electrode forms along the first direction of principal axis, and above-mentioned drive electrode forms along the second direction of principal axis, and above-mentioned the first direction of principal axis intersects mutually with above-mentioned the second direction of principal axis.
18. a touch panel display device, comprise double-deck electrode layer, and utilize the mutual capacitance between each layer of electrode to identify the touch input, it is characterized in that,
Comprise:
Touch panel, be formed with a plurality of sensing electrodes, and
Display panel, be formed with a plurality of drive electrodes that are applied in driving voltage;
Form light polarizing film between above-mentioned a plurality of sensing electrodes and a plurality of drive electrode.
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