CN102541334B - Touch display device and method of manufacturing the same - Google Patents
Touch display device and method of manufacturing the same Download PDFInfo
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- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical group O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 claims description 4
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- 239000010409 thin film Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
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Abstract
A touch display device and a method of manufacturing the same, the touch display device comprising: the touch screen comprises a touch structure layer, a touch screen substrate and a pixel array substrate, wherein the touch screen substrate comprises an output lead (comprising a driving electrode lead and an induction electrode lead) of the touch structure layer, and the pixel array substrate is provided with a pixel array and a peripheral lead of the pixel array; the output lead of the touch control structure layer is overlapped with the peripheral lead of the pixel array in the light transmission direction; the touch display device further comprises a first shielding layer disposed between the drive electrode leads and peripheral leads of the pixel array; and the second shielding layer is arranged between the sensing electrode lead and the peripheral lead of the pixel array. The shielding layer reduces the parasitic capacitance between the peripheral lead of the pixel array substrate and the output lead of the touch screen substrate, avoids the coupling between the driving electrode and the sensing electrode of the touch screen through the parasitic capacitance, and further improves the signal-to-noise ratio.
Description
Technical field
The present invention relates to touch display field, particularly relate to a kind of embedded touch display unit and manufacture method thereof.
Background technology
Touch display unit inputs medium as one, is man-machine interaction mode the simplest, convenient, a kind of.Therefore, touch display unit is applied in various electronic product more and more, such as mobile phone, notebook computer, MP3/MP4 etc..
Being equipped with touch screen in touch display unit, to realize touching the function of display, and based on different operation principles and the medium of transmission information, touch screen can be divided into resistance-type, condenser type, infrared-type, surface acoustic wave four type.And capacitive touch screen is long owing to having the life-span, light transmittance is high, can support that the advantages such as multiple point touching become the touch screen technology of current main flow.In order to make touch display unit more frivolous, prior art has developed embedded touch display (In-cell touch panel) technology, during i.e. touch screen is integrated in liquid crystal display.The schematic top plan view of embedded touch display unit one embodiment of prior art is shown with reference to Fig. 1.Described touch display unit includes: the image element array substrates (not shown) that touch screen base plate and touch screen base plate are oppositely arranged.
It will be seen from figure 1 that the display plane of the embedded touch display unit of prior art includes showing for image and the touching viewing area 121, be placed with the peripheral leads district 111 of a plurality of leads of touch sensible.Described image element array substrates is provided with the peripheral leads (not shown) of the public electrode lead-in wire of pel array and pel array, scan line lead-in wire etc., corresponds respectively to touch viewing area 121 and peripheral leads district 111.Described touch screen base plate is provided with the output lead (including that drive electrode lead-in wire and induction electrode go between) (not shown) of touch-control structure layer and the touch-control structure layer including drive electrode and induction electrode, corresponds respectively to touch viewing area 121 and peripheral leads district 111.It is to say, described pel array is oppositely arranged in described touch viewing area 121 with described touch-control structure layer；The peripheral leads of described pel array is oppositely arranged in described peripheral leads district 111 with the output lead of described touch-control structure floor, and the peripheral leads of the output lead of touch-control structure layer and described pel array is overlapping on printing opacity direction.
The peripheral leads of described pel array and pel array is arranged at the first transparency carrier (being not drawn in figure)；The touch-control structure layer of described drive electrode and induction electrode, the output lead of touch-control structure layer are arranged on the second transparency carrier and (are not drawn in figure).
Four parts 111a, 111b, 111c, the 111d in the most corresponding peripheral leads district 111 of four edges AB, BC, CD, DA of described touch display unit；All kinds of lead-in wires of image element array substrates are connected to display driver chip (not shown) from the BC limit of 111b, and other parts 111a in peripheral leads district 111,111c, 111d are distributed with public electrode lead-in wire, and 111a, 111c are also distributed scan line lead-in wire.Drive electrode lead-in wire and the induction electrode lead-in wire of the touch-control structure layer of general touch screen base plate can not export from same direction with all kinds of lead-in wires of image element array substrates, so the output lead of touch screen base plate can not the corresponding 111b part in peripheral lead district 111, can only be corresponding at peripheral other parts 111a of lead district 111,111c, 111d.In other words, the drive electrode lead-in wire of touch screen base plate and the peripheral leads of induction electrode lead-in wire and image element array substrates are overlapping at peripheral other parts 111a of lead district 111,111c, 111d.
Fig. 1 of the present embodiment illustrate only the situation that the output lead of touch screen base plate is overlapping at the 111c of peripheral lead district 111 with the peripheral leads of image element array substrates.
It is to be expanded on further as a example by LCD (Liquid Crystal Display) touch display by touch display unit.The generalized section touching viewing area 121 of an embodiment of LCD (the Liquid Crystal Display) touch display of prior art is shown with reference to Fig. 2.Touching viewing area 121, LCD (the Liquid Crystal Display) touch display of this embodiment includes: touch screen base plate 001 that image element array substrates 003 and image element array substrates 003 are oppositely arranged, the liquid crystal layer 002 being arranged between image element array substrates 003 and touch screen base plate 001；Wherein the relative liquid crystal layer 002 of touch screen base plate 001 includes the most successively: the first transparency carrier 101, touch-control structure layer 102, insulating barrier 103, common electrode layer (ITO) 104；Liquid crystal layer 002 includes multiple liquid crystal molecule 105；The relative liquid crystal layer 002 of image element array substrates 003 is from closely far including successively: pel array the 106, second transparency carrier 107.When to realize colored display, colored filter (Color Filter, CF) can be used to serve as insulating barrier 103, it is also possible to increase by a colored filter between the first transparency carrier 101 and touch-control structure layer 102.Described LCD touch display unit also includes polaroid, backing structure etc., in order to brief, clear, illustrates the most in the drawings.In the present embodiment, described touch-control structure layer 102 is embedded in touch screen base plate 001, makes touch display unit more frivolous.With reference to Fig. 3, it is shown that the schematic diagram of touch-control structure layer shown in Fig. 2 102 1 embodiment, in the present embodiment, described touch-control structure layer 102 is as a example by single-layer electrodes touch-control structure.Specifically, described touch-control structure layer 102 includes driving layer and inductive layer, drives layer to include multiple drive electrode 71, and is regularly arranged into multirow drive electrode 71a, 71b, 71c, 71d；Inductive layer includes multiple induction electrode 72, and the drive electrode 71 of induction electrode 72 and each column is spaced, and each drive electrode 71 and adjacent induction electrode 72 form mutual capacitance.Wherein, driving layer and inductive layer to be positioned at same layer, drive electrode 71 is by driving line 81 to be connected with drive circuit unit (not shown), and induction electrode 72 is connected with testing circuit unit (not shown) by the line of induction 82.When finger touches touch screen, electric current flows into finger, the change of the mutual capacitance being equivalent between drive electrode 71 and induction electrode 72, measures, from testing circuit unit, the weak current change that described mutual capacitance change causes, and then acquisition finger touches the position of touch screen.
With reference to Fig. 4, show the schematic diagram of the embodiment of pel array 106 1 shown in Fig. 2, described pel array 106 includes the multi-strip scanning line 91 that horizontal direction arranges, a plurality of data wire 92 being perpendicular to scan line 91 arrangement, described multi-strip scanning line 91 and a plurality of data lines 92 surround multiple pixel cell, pixel cell includes thin film transistor (TFT) TFT 94, described scan line 91 is connected to the grid of TFT 94, signal is driven for providing to pixel cell, described data wire 92 is connected to the source/drain of TFT 94, for providing the pixel voltage for showing image to pixel cell.It should be noted that and Fig. 4 illustrate only scan line 91 and data wire 92, in other embodiments of pel array, the pixel cell of described pel array has the pixel public electrode for forming storage electric capacity, described pixel public electrode is connected by the public electrode lead-in wire in peripheral leads district 111 with the common electrode layer 104 in touch screen base plate, and holds with being connected to.
With reference to Fig. 5, it is shown that the schematic diagram of peripheral leads district shown in Fig. 1 one embodiment.It should be noted that, in order to the driving line 81 in touch screen and the line of induction 82 are connected to circuit unit, being placed with drive electrode lead-in wire 1021 and induction electrode lead-in wire 1022 in peripheral lead district 111c, described drive electrode lead-in wire 1021 is for connecting driving line 81 and being positioned at the drive circuit unit (not shown) on touch display unit CD limit, induction electrode lead-in wire 1022 for connecting the line of induction 82 and being positioned at the testing circuit unit (not shown) on touch display unit CD limit；In order to pel array 106 is connected to circuit unit, peripheral leads district 111c is placed with scan line lead-in wire 1061 and public electrode lead-in wire 1062, for scan line 91 and public electrode (not shown) to be connected to display driver chip (not shown) from BC limit.In peripheral lead district 111c, drive electrode lead-in wire 1021 and induction electrode lead-in wire 1022 are row arrangement, and scan line lead-in wire 1061 and public electrode lead-in wire 1062 are row arrangement, therefore described in peripheral lead district 111, drive electrode lead-in wire 1021, induction electrode lead-in wire 1022 all overlap with scan line lead-in wire 1061 and public electrode lead-in wire 1062.The present embodiment illustrate only the drive electrode lead-in wire 1021 of touch screen base plate and the scan line lead-in wire 1061 of induction electrode lead-in wire 1022 and image element array substrates and public electrode lead-in wire 1062 and overlaps in the 111c part of peripheral lead district 111.It is true that the drive electrode lead-in wire 1021 of touch screen base plate and induction electrode lead-in wire 1022 can also be overlapping in the 111a part of peripheral lead district 111 with the scan line lead-in wire 1061 of image element array substrates and public electrode lead-in wire 1062；Or the drive electrode lead-in wire 1021 of touch screen base plate and induction electrode lead-in wire 1022 are overlapping in the 111d part of peripheral lead district 111 with the public electrode lead-in wire 1062 of image element array substrates.Therefore, drive electrode lead-in wire 1021 and the induction electrode lead-in wire 1022 of touch screen base plate can be simultaneously overlapping with a scan line lead-in wire or public electrode lead-in wire.Drive electrode lead-in wire 1021 and the generalized sections at the overlapping place of scan line lead-in wire 1061 in peripheral leads district 111c shown in Fig. 5.It should be noted that peripheral leads district 111 be not provided with liquid crystal layer, transparency conducting layer and colored filter.In described peripheral leads district, touch display unit includes the first transparency carrier 101 and the second transparency carrier 107 being oppositely arranged, the described drive electrode lead-in wire 1021 that sets gradually to the second transparency carrier 107 from the first transparency carrier 101, insulating barrier 108, the scan line lead-in wire 1061 of described pel array.The passivation layer (for example, silicon nitride) that wherein insulating barrier 108 can be disposed on image element array substrates 003, and/or it is arranged at the sealed plastic box between image element array substrates 003 and touch screen base plate 001.Due to the thickness of insulating barrier 108 less (particularly when insulating barrier 108 is passivation layer), therefore, the overlapping place of scan line lead-in wire 1061 and drive electrode lead-in wire 1021 forms bigger parasitic capacitance.Same, the overlapping place of public electrode lead-in wire 1062 and the overlapping place of drive electrode lead-in wire 1021, scan line lead-in wire 1061 and the overlapping place of induction electrode lead-in wire 1022 and public electrode lead-in wire 1062 and induction electrode lead-in wire 1022 all can form bigger parasitic capacitance.It can thus be appreciated that, in described peripheral leads district, described touch display unit includes the first transparency carrier 101 and the second transparency carrier 107 being oppositely arranged, the output lead (including drive electrode lead-in wire 1021 and induction electrode lead-in wire 1022) of the touch screen base plate set gradually to the second transparency carrier 107 from the first transparency carrier 101, insulating barrier 108, the peripheral leads (including scan line lead-in wire 1061 and public electrode lead-in wire 1062) of described pel array.
Described parasitic capacitance reduces the signal to noise ratio touching detection signal compared with conference.In order to be illustrated more clearly that the impact of stray capacitance upon touch detection signal, the schematic equivalent circuit below in conjunction with touch screen is described further.
The touch-control schematic equivalent circuit of the touch display unit of prior art is shown with reference to Fig. 6.Described equivalent circuit includes: signal source 3, drive electrode resistance 1, the mutual capacitance 12 between drive electrode and induction electrode, induction electrode resistance 2, testing circuit 6, additionally include, the drive electrode lead-in wire of touch screen base plate and the scan line lead-in wire of image element array substrates or overlapping parasitic capacitance 13a formed of public electrode lead-in wire, touch screen base plate induction electrode lead-in wire and the scan line of image element array substrates lead-in wire or overlapping parasitic capacitance 13b formed of public electrode lead-in wire, parasitic capacitance 13a and 13b go between by scan line or public electrode goes between and is connected；Scan line lead-in wire or the resistance 16 of public electrode lead-in wire, scan line lead-in wire or the inductance 17 of public electrode lead-in wire.Wherein, signal source 3 is for applying driving signal on drive electrode；Testing circuit 6 then detects signal 14 for detecting touch.
When parasitic capacitance 13a is bigger with 13b, for the AC signal that signal source 1 sends, its capacitive reactance is less, therefore, coupled with 13b by this parasitic capacitance 13a between drive electrode and the induction electrode of touch screen, AC signal passes sequentially through less driving parasitic capacitance 13a of capacitive reactance and 13b, forms current path 18, and AC signal is by can form bigger basal signal at testing circuit 6 after described current path 18.The signal corresponding due to mutual capacitance change is the least, is easily submerged in bigger basal signal, makes testing circuit 6 be difficult to detect by the signal that mutual capacitance change is corresponding, causes and detect unsuccessfully.
The touch display unit of prior art includes image element array substrates (the such as LCD pixel array base palte being oppositely arranged from the above, OLED pixel array base palte) and touch screen base plate, wherein the output lead (including that drive electrode lead-in wire and induction electrode go between) of touch screen base plate produces bigger parasitic capacitance with the peripheral leads of image element array substrates (including scan line lead-in wire and public electrode lead-in wire) at the peripheral lead district place of overlapping, couple generation by this parasitic capacitance 13a with 13b between drive electrode and the induction electrode of touch screen and disturb signal, testing circuit is made to be difficult to detect by the signal that mutual capacitance change is corresponding, even cause and detect unsuccessfully.
Summary of the invention
The problem that the present invention solves be prior art touch display unit in the drive electrode lead-in wire of touch screen base plate and induction electrode lead-in wire and the peripheral leads of image element array substrates in the bigger parasitic capacitance of the peripheral lead district place of overlapping generation, interference signal is produced by the coupling of this parasitic capacitance between drive electrode and the induction electrode of touch screen, make testing circuit be difficult to detect by the signal that mutual capacitance change is corresponding, even cause and detect unsuccessfully；Touch display unit and manufacture method thereof that a kind of signal to noise ratio is higher are provided.
For solving the problems referred to above, the present invention provides a kind of touch display unit, including: the image element array substrates that touch screen base plate and touch screen base plate are oppositely arranged；Described image element array substrates is provided with the peripheral leads of pel array and pel array, described touch screen base plate is provided with touch-control structure layer and the output lead of touch-control structure layer；Described touch-control structure layer includes that drive electrode and induction electrode, the output lead of described touch-control structure layer include that drive electrode lead-in wire and induction electrode go between；The output lead of touch-control structure layer and the peripheral leads of described pel array are overlapping on printing opacity direction；Described touch display unit also includes the first screen layer being arranged between described drive electrode lead-in wire and the peripheral leads of described pel array；It is arranged at the secondary shielding layer between described induction electrode lead-in wire and the peripheral leads of described pel array.
Described first screen layer, described secondary shielding layer are electrically connected in ground end.Described peripheral leads includes that public electrode lead-in wire and scan line go between.The display plane of described touch display unit includes showing the touch viewing area with touch sensible for image, being placed with the peripheral leads district of a plurality of leads；Described pel array is oppositely arranged in described touch viewing area with described touch-control structure layer；The peripheral leads of described pel array is oppositely arranged in described peripheral leads district with the output lead of described touch-control structure floor.Described touch screen base plate also includes that the first transparency carrier, the output lead of described touch-control structure layer and touch-control structure layer are arranged on described first transparency carrier；Described image element array substrates also includes that the second transparency carrier, the peripheral leads of described pel array and pel array are arranged on described second transparency carrier.In described peripheral leads district, described touch display unit includes the first transparency carrier and the second transparency carrier being oppositely arranged, the output lead of described touch-control structure layer that sets gradually to the second transparency carrier from the first transparency carrier, screen layer, insulating barrier, the peripheral leads of described pel array.Described insulating barrier can include passivation layer and/or sealed plastic box.
Optionally, in described touch viewing area, described touch display unit also includes the liquid crystal layer being arranged between described image element array substrates and described touch screen base plate；The most described liquid crystal layer of described touch screen base plate includes the most successively: the first transparency carrier, touch-control structure layer, insulating barrier, common electrode layer；The most described liquid crystal layer of described image element array substrates is from closely far including successively: pel array, the second transparency carrier.Described insulating barrier can be colored filter.Described first screen layer and secondary shielding layer can be arranged in described touch screen base plate, are positioned at same layer with described common electrode layer.The material of described first screen layer and secondary shielding and described common electrode layer can be all tin indium oxide or metal material.
Optionally, described touch-control structure layer is single-layer electrodes touch-control structure, and described drive electrode and induction electrode are multiple and are spaced.Described common electrode layer includes multiple spaced first public electrode and the second public electrode；On printing opacity direction, the first public electrode and drive electrode are just to setting, and the second public electrode and induction electrode are just to setting；All first public electrodes are also held with receiving, and all second public electrodes are also held with receiving.Described first screen layer electrically connects with described first common electrode layer, and described secondary shielding layer electrically connects with described second common electrode layer.Described first screen layer and described first common electrode layer are an entirety, it is achieved the electrical connection of the two；Described secondary shielding layer and described second common electrode layer are an entirety, it is achieved the electrical connection of the two.
Optionally, described touch screen is two-layer electrode touch-control structure.
Optionally, described common electrode layer is one overall, described first screen layer, secondary shielding layer one of them be connected to common electrode layer.
In above technical scheme, described first screen layer and secondary shielding can also be arranged in image element array substrates.Described touch display unit can be liquid crystal indicator or organic electroluminescent diode display device.
Correspondingly, the present invention also provides for the manufacture method of a kind of touch display unit, including: the first transparency carrier is provided；Described first transparency carrier is formed touch-control structure layer and the output lead of touch-control structure layer, described touch-control structure layer is single-layer electrodes touch-control structure, including spaced drive electrode and induction electrode, the output lead of touch-control structure layer includes that drive electrode lead-in wire and induction electrode go between；Described touch screen attaches colored filter；Formation of deposits common electrode layer on described colored filter, spaced first public electrode and the second public electrode is formed in touch display unit viewing area, described first public electrode and described drive electrode are just to setting, and described second public electrode and described induction electrode are just to setting；During forming the first public electrode and the second public electrode, formed and cover described drive electrode lead-in wire the first screen layer being connected with described first public electrode and cover described induction electrode lead-in wire the secondary shielding layer being connected with described second public electrode；Second transparency carrier is provided and is formed on pel array；
Liquid crystal layer is formed between the first transparency carrier and the second transparency carrier.
Compared with prior art, the invention have the advantages that
1. screen layer described in reduces the parasitic capacitance between the peripheral leads (including public electrode lead-in wire and scan line lead-in wire) of image element array substrates and the output lead (drive electrode lead-in wire and induction electrode lead-in wire) of touch screen base plate, avoid and coupled by this parasitic capacitance between the drive electrode of touch screen and induction electrode, and then improve signal to noise ratio；
2. screen layer can concurrently form with transparency conducting layer, it is to avoid increases technique, makes simple.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of prior art mutual capacitance type touch screen one embodiment；
Fig. 2 is the generalized section touching viewing area of an embodiment of the LCD touch display of prior art；
Fig. 3 is the schematic diagram of touch-control structure layer shown in Fig. 2 one embodiment；
Fig. 4 is the schematic diagram of the embodiment of pel array one shown in Fig. 2；
Fig. 5 is the schematic diagram of peripheral leads district shown in Fig. 1 one embodiment；
Fig. 6 is the touch-control schematic equivalent circuit of the touch display unit of prior art；
Fig. 7 is the touch-control schematic equivalent circuit of this present invention touch display unit；
Fig. 8 is the schematic diagram of inventive touch display device one embodiment；
Fig. 9 is the schematic top plan view of the embodiment of touch screen base plate one shown in Fig. 8；
Figure 10 is the schematic top plan view of inventive touch another embodiment of panel substrate.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in detail.
Elaborating a lot of detail in the following description so that fully understanding the present invention, but the present invention can also use other to be different from alternate manner described here to be implemented, therefore the present invention is not limited by following public specific embodiment.
In order to solve the problem described in background technology, inventor providing a kind of touch display unit, described touch display unit includes the image element array substrates being oppositely arranged and comprises the touch screen base plate of touch-control structure layer；Its display plane include for carry out image show and touch sensible touch viewing area, be placed with a plurality of leads (include scan line lead-in wire and public electrode go between) peripheral leads district；In described peripheral leads district, described touch display unit includes: the first transparency carrier of the touch screen base plate being oppositely arranged and the second transparency carrier of image element array substrates, from the peripheral leads of the output lead of touch-control structure, screen layer, insulating barrier and pel array that the first transparency carrier sets gradually to the second transparency carrier；Wherein, the output lead of touch-control structure includes that drive electrode lead-in wire and induction electrode go between, described screen layer includes the first screen layer and secondary shielding layer, described first screen layer is arranged between drive electrode lead-in wire and the peripheral leads of pel array, described secondary shielding layer is arranged between induction electrode lead-in wire and the peripheral leads of pel array, and described first screen layer and secondary shielding layer are electrically connected in ground end.
Below in conjunction with the touch-control schematic equivalent circuit of the inventive touch display device shown in Fig. 7, describe inventive touch display device and can improve the principle of signal to noise ratio.
As shown in Figure 7, described equivalent circuit includes: signal source 3, drive electrode resistance 1, induction electrode resistance 2, testing circuit 6, mutual capacitance 12 between drive electrode and induction electrode, described equivalent circuit also includes the first parasitic capacitance the 51, first screen layer resistance 52 and the first screen layer inductance 53 produced between drive electrode lead-in wire and the first screen layer, the second parasitic capacitance 54, secondary shielding layer resistance 55 and the secondary shielding layer inductance 56 produced between induction electrode lead-in wire and secondary shielding layer；Owing to described first screen layer and secondary shielding layer are electrically connected in ground end, therefore in equivalent circuit, hold 57 after described first parasitic capacitance the 51, first screen layer resistance 52 and the series connection of the first screen layer inductance 53 with being connected to, after described second parasitic capacitance 54, secondary shielding layer resistance 55 and the series connection of secondary shielding layer inductance 56, hold 57 with being connected to.
nullThe AC signal sent when signal source 3 is after drive electrode resistance 1，Part AC signal passes through mutual capacitance 12、Induction electrode resistance 2 arrives testing circuit 6，Part AC signal passes sequentially through the first parasitic capacitance 51、First screen layer resistance 52 and the first screen layer inductance 53 lead ground end 57，Or pass sequentially through the second parasitic capacitance 54、Secondary shielding layer resistance 55 and secondary shielding layer inductance 56 lead ground end 57，AC signal is difficult to pass sequentially through the first parasitic capacitance 51、First screen layer resistance 52、First screen layer inductance 53、Second parasitic capacitance 54、Secondary shielding layer resistance 55 and secondary shielding layer inductance 56 detected circuit 6 detect，Bigger basal signal is produced from at testing circuit，What testing circuit 6 was detected is mainly the detection signal by mutual capacitance 12，Such that it is able to the most accurately detection mutual capacitance 12 changes caused change in detection signal，Thus avoid the detection failure problem caused more greatly because of parasitic capacitance.
Technical scheme is further described below in conjunction with specific embodiment.
With reference to Fig. 8, show the schematic diagram of inventive touch display device one embodiment, described touch display unit is LCD touch display, its display plane includes touching viewing area 211 and surrounding the peripheral leads district 212 of this touch viewing area 211, in the touch viewing area 211 of touch display unit, described touch display unit includes the touch screen base plate 004 that image element array substrates 006 and image element array substrates 006 are oppositely arranged, the liquid crystal layer 005 being arranged between image element array substrates 006 and touch screen base plate 004 on printing opacity direction.Wherein the relative liquid crystal layer 005 of touch screen base plate 004 includes the most successively: the first transparency carrier 201, touch-control structure layer 202, insulating barrier 203, common electrode layer (ITO) 204；Liquid crystal layer 005 includes multiple liquid crystal molecule 205；The relative liquid crystal layer 005 of image element array substrates 006 is from closely far including successively: pel array the 206, second transparency carrier 207.When to realize colored display, colored filter (Color Filter, CF) can be used to serve as insulating barrier 203, it is also possible to increase by a colored filter between the first transparency carrier 201 and touch-control structure layer 202.Described LCD touch display unit also includes polaroid, backing structure etc., in order to brief, clear, illustrates the most in the drawings.
In peripheral lead district 212, the peripheral leads (including that public electrode lead-in wire and scan line go between) of image element array substrates 006 is 212a with the overlapping region of the output lead (including drive electrode lead-in wire and induction electrode lead-in wire) of the touch-control structure layer 202 of touch screen base plate 004.At this overlapping region 212a, described touch display unit includes the first transparency carrier 201 and the second transparency carrier 207 being oppositely arranged, the output lead 210 of described touch-control structure layer 202 that sets gradually to the second transparency carrier 207 from the first transparency carrier 201, screen layer 209, insulating barrier 208, the peripheral leads 220 of described pel array 206.
In conjunction with reference to Fig. 9, show the schematic top plan view of touch screen base plate first embodiment shown in Fig. 8, in order to make the structure of screen layer, position clearer, Fig. 9 only illustrates screen layer 209, touch-control structure layer 202, the output lead 210 of touch-control structure layer 202, common electrode layer 204.
The present embodiment is as a example by the touch-control structure layer of single-layer electrodes, in the touch-control structure layer of single-layer electrodes, drive electrode and induction electrode are positioned at same layer, specifically, at described touch viewing area 211, described touch-control structure layer 202 includes: by multiple drive electrodes 2021, the induction electrode 2022 of multiple bar shaped of row arrangement, each row drive electrode 2021 is spaced with induction electrode 2022, and drive electrode 2021 and adjacent induction electrode 2022 form mutual capacitance；Image element array substrates peripheral leads and touch screen base plate touch-control structure layer 202 output lead 210 overlapping region 212a at, the output lead 210 of described touch-control structure layer 202 includes drive electrode lead-in wire 2023 and induction electrode lead-in wire 2024, described drive electrode 2021 is connected with drive circuit (not shown) by drive electrode lead-in wire 2023, and induction electrode 2022 is connected with testing circuit (not shown) by induction electrode lead-in wire 2024.
In overlapping region district 212a, described screen layer 209 is identical with common electrode layer 204 same layer touched in viewing area 211 and material, and such screen layer 209 just can be prepared with common electrode layer 204 simultaneously, it is not necessary to extra preparation process.Specifically, the tin indium oxide (ITO) that the material of described screen layer 209 is, the thickness of described screen layer 209 is 1000～1500In the range of.
In the present embodiment, described screen layer 209 includes the first screen layer 2091 and secondary shielding layer 2092, and described first screen layer 2091 and secondary shielding layer 2092 are for be arranged at rectangular conductive thin film same layer, separate.Wherein, described first screen layer 2091, in peripheral lead district 212a, is arranged between the peripheral leads (including public electrode lead-in wire and scan line lead-in wire) of drive electrode lead-in wire 2023 and image element array substrates, and electrically connects and ground end；Described secondary shielding layer 2092, in peripheral lead district 212a, is arranged between the peripheral leads (including public electrode lead-in wire and scan line lead-in wire) of induction electrode lead-in wire 2024 and image element array substrates, and electrically connects and ground end.
As it is shown in figure 9, common electrode layer 204 includes multiple spaced first public electrode 2041 and the second public electrode 2042；On printing opacity direction, the first public electrode 2041 is with drive electrode 2021 just to setting, and the second public electrode 2042 and induction electrode 2022 are just to setting；All first public electrodes 2041 also hold 303 with receiving, and all second public electrodes 2042 also hold 304 with receiving.Drive electrode so can be avoided to be coupled by the parasitic capacitance generation formed with public electrode with induction electrode, improve detection signal-to-noise ratio further.
In the present embodiment, described first screen layer 2091 is electrically connected to the first common electrode layer 2041 by connecting line (not shown), and then holds 303 with being electrically connected to；Described secondary shielding layer 2092 is electrically connected to the second transparency conducting layer 2042 by connecting line (not shown), and then holds 304 with being electrically connected to.It should be noted that, in the first embodiment of the invention, described first screen layer 2091 can also be made of one with the first public electrode 2041, that is the ITO being used as the first public electrode 2041 extends to peripheral leads district, cover described drive electrode lead-in wire 2023, described secondary shielding layer 2092 can also be made of one with the second public electrode 2042, say, that the ITO as the second public electrode 2042 extends to peripheral leads district, covers described induction electrode lead-in wire 2024.
It can further be stated that, in the first embodiment of the invention, described public electrode includes the first public electrode 2041 and the second public electrode 2042, described first public electrode 2041 and the second public electrode 2042 ground connection respectively, but the present invention is not restricted to this, described public electrode can be holistic public electrode, one of them of described first screen layer 2091 and secondary shielding layer 2092 is held by public electrode with being connected to, can be by other assembly ground connection by the screen layer of public electrode ground connection.Additionally, described first screen layer 2091 and secondary shielding layer 2092 also can not be connected to ground by public electrode, as long as both distinguish ground connection, those skilled in the art can revise accordingly according to above-described embodiment, replace and deform.
The present invention also provides for the second embodiment of touch display unit, the present embodiment is with the difference of first embodiment, touch-control structure layer is that two-layer electrode touch-control structure, i.e. drive electrode and induction electrode lay respectively at and be provided with insulating barrier between different layers, and described drive electrode and induction electrode.With reference to Figure 10, show the top view of touch screen base plate the second embodiment in touch display unit shown in Fig. 8, touch screen in described touch display unit includes including drive electrode 401 and induction electrode 402, described drive electrode 401 generally includes multiple drive electrode by rows, such as 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, described induction electrode 402 generally includes multiple induction electrode by row arrangement, such as 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h.Described drive electrode is the most overlapping with described induction electrode, forms mutual capacitance.
Wherein, in the peripheral leads district of touch display unit, there is output lead, including drive electrode lead-in wire 405 and induction electrode lead-in wire 406, described drive electrode lead-in wire 405 for being connected to drive circuit (not shown) by drive electrode 401, and described induction electrode lead-in wire 406 is for being connected to testing circuit (not shown) by induction electrode 402.Owing to the peripheral leads (such as scan line lead-in wire or public electrode lead-in wire) of drive electrode lead-in wire 405 (induction electrode lead-in wire 406) and pel array has overlapping, bigger mutual capacitance can be produced, described touch display unit is additionally provided with the first screen layer 403 and the secondary shielding layer 404 of peripherally located lead district, described first screen layer 403 is arranged between drive electrode lead-in wire 405 and the peripheral leads of pel array, and described secondary shielding layer 404 holds and is arranged between induction electrode lead-in wire 406 and the peripheral leads of pel array with being connected to, described first screen layer 403 and secondary shielding layer 404 connect electricity respectively and hold with being connected to.
Correspondingly, the present invention also provides for a kind of manufacture method including above-mentioned touch display unit, said method comprising the steps of:
First transparency carrier is provided；
Forming touch-control structure layer and the output lead of touch-control structure layer on described first transparency carrier, described touch-control structure layer is single-layer electrodes touch-control structure, including spaced drive electrode and induction electrode；The output lead of touch-control structure layer includes that drive electrode lead-in wire and induction electrode go between；
Described touch screen attaches colored filter；
Formation of deposits common electrode layer on described colored filter, spaced first public electrode and the second public electrode is formed in touch display unit viewing area, described first public electrode and described drive electrode are just to setting, and described second public electrode and described induction electrode are just to setting；
During forming the first public electrode and the second public electrode, formed and cover described drive electrode lead-in wire the first screen layer being connected with described first public electrode and cover described induction electrode lead-in wire the secondary shielding layer being connected with described second public electrode；
Second transparency carrier is provided and is formed on pel array；
Between the first transparency carrier and the second transparency carrier, form liquid crystal layer, and paste and described first transparency carrier, the second transparency carrier.
It should be noted that in the manufacture method of above-mentioned touch display unit, described screen layer and common electrode layer are all transparent conductive material (ITO), therefore, can be while viewing area forms common electrode layer, screen layer is formed in peripheral lead district, therefore the manufacture of inventive touch display device will not increase processing step, but the present invention is not restricted to this, described screen layer can also is that other conductive materials, due to the peripherally located lead district of described screen layer, the most described screen layer can select the conductive materials such as lighttight metal.
It can further be stated that, in above-described embodiment, described screen layer is arranged in touch screen base plate, but the present invention is not restricted to this, and described screen layer can also be arranged in image element array substrates, it can further be stated that, in above-described embodiment, as a example by liquid crystal indicator, but the present invention is not limiting as and this, can also is that organic electroluminescent LED (OLED) display device, those skilled in the art can correspondingly deform according to above-described embodiment, revise and replace.
Although the present invention is open as above with preferred embodiment; but it is not for limiting the present invention; any those skilled in the art are without departing from the spirit and scope of the present invention; technical solution of the present invention is made possible variation and amendment by the method and the technology contents that may be by the disclosure above; therefore; every content without departing from technical solution of the present invention; any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, belongs to the protection domain of technical solution of the present invention.
Claims (21)
1. a touch display unit, including: the image element array substrates that touch screen base plate and touch screen base plate are oppositely arranged；Described
Image element array substrates is provided with the peripheral leads of pel array and pel array, described touch screen base plate is provided with touch-control knot
Structure layer and the output lead of touch-control structure layer；Described touch-control structure layer includes drive electrode and induction electrode, described touch-control structure
The output lead of layer includes that drive electrode lead-in wire and induction electrode go between；The output lead of touch-control structure layer and described pel array
Peripheral leads overlapping on printing opacity direction；It is characterized in that, described touch display unit also includes being arranged at described driving electricity
The first screen layer between pole lead-in wire and the peripheral leads of described pel array；It is arranged at described induction electrode lead-in wire and described picture
Secondary shielding layer between the peripheral leads of pixel array；
Described first screen layer and secondary shielding layer are independent.
2. touch display unit as claimed in claim 1, it is characterised in that described first screen layer, described secondary shielding layer divide
Do not hold with being electrically connected to.
3. touch display unit as claimed in claim 1, it is characterised in that described peripheral leads includes public electrode lead-in wire and sweeps
Retouch line lead-in wire.
4. touch display unit as claimed in claim 1, it is characterised in that the display plane of described touch display unit includes using
Show the touch viewing area with touch sensible in image, be placed with the peripheral leads district of a plurality of leads；Described pel array and institute
State touch-control structure layer to be oppositely arranged in described touch viewing area；The peripheral leads of described pel array and described touch-control structure layer
Output lead is oppositely arranged in described peripheral leads district.
5. touch display unit as claimed in claim 4, it is characterised in that described touch screen base plate also includes the first transparency carrier,
The output lead of described touch-control structure layer and touch-control structure layer is arranged on described first transparency carrier；Described image element array substrates
Also include that the second transparency carrier, the peripheral leads of described pel array and pel array are arranged on described second transparency carrier.
6. touch display unit as claimed in claim 5, it is characterised in that in described peripheral leads district, described touch display dress
Put the first transparency carrier and the second transparency carrier including being oppositely arranged, set successively to the second transparency carrier from the first transparency carrier
The output lead of described touch-control structure layer put, screen layer, insulating barrier, the peripheral leads of described pel array.
7. touch display unit as claimed in claim 6, it is characterised in that described insulating barrier includes passivation layer and/or sealed plastic box.
8. touch display unit as claimed in claim 5, it is characterised in that in described touch viewing area, described touch display dress
Put the liquid crystal layer also including being arranged between described image element array substrates and described touch screen base plate；Described touch screen base plate is relative
Described liquid crystal layer includes the most successively: the first transparency carrier, touch-control structure layer, insulating barrier, common electrode layer；Described
The most described liquid crystal layer of image element array substrates is from closely far including successively: pel array, the second transparency carrier.
9. touch display unit as claimed in claim 8, it is characterised in that described insulating barrier is colored filter.
10. touch display unit as claimed in claim 8, it is characterised in that described first screen layer and secondary shielding layer are arranged at
In described touch screen base plate, it is positioned at same layer with described common electrode layer.
11. touch display units as claimed in claim 10, it is characterised in that described first screen layer and secondary shielding are with described
The material of common electrode layer is tin indium oxide.
12. touch display units as claimed in claim 10, it is characterised in that described first screen layer and the material of secondary shielding
For metal material.
In 13. touch display units as claimed in claim 8, it is characterised in that described touch-control structure layer is single-layer electrodes touch-control knot
Structure, described drive electrode and induction electrode are multiple and are spaced.
14. touch display units as claimed in claim 13, it is characterised in that described common electrode layer includes multiple being spaced
The first public electrode and the second public electrode；On printing opacity direction, the first public electrode and drive electrode are just to setting, and second
Public electrode and induction electrode are just to setting；All first public electrodes are also held with receiving, and all second public electrodes are also received
Ground end.
15. touch display units as claimed in claim 14, it is characterised in that described first screen layer and described first common electrical
Pole electrically connects, and described secondary shielding layer electrically connects with described second public electrode.
16. touch display units as claimed in claim 15, it is characterised in that described first screen layer and described first common electrical
Extremely one is overall, and described secondary shielding layer and described second public electrode are an entirety.
17. touch display units as claimed in claim 5, it is characterised in that described touch screen is two-layer electrode touch-control structure.
18. touch display units as claimed in claim 8, it is characterised in that described common electrode layer is one overall, described the
One screen layer, secondary shielding layer one of them be connected to common electrode layer.
19. touch display units as according to any one of claim 1-9,13-18, it is characterised in that described first screen layer and
Secondary shielding is arranged in image element array substrates.
20. touch display units as according to any one of claim 1-18, described touch display unit be liquid crystal indicator or
Organic electroluminescent diode display device.
The manufacture method of 21. 1 kinds of touch display units, it is characterised in that including:
First transparency carrier is provided；
Forming touch-control structure layer and the output lead of touch-control structure layer on described first transparency carrier, described touch-control structure layer is
Single-layer electrodes touch-control structure, including spaced drive electrode and induction electrode, the output lead of touch-control structure layer includes driving
Moving electrode lead-in wire and induction electrode go between；
Described touch screen attaches colored filter；
Formation of deposits common electrode layer on described colored filter, is formed spaced in touch display unit viewing area
First public electrode and the second public electrode, described first public electrode and described drive electrode are just to setting, and described second is public
Common electrode and described induction electrode are just to setting；
During forming the first public electrode and the second public electrode, formed and cover described drive electrode lead-in wire and with described
The first screen layer that first public electrode is connected and cover described induction electrode and go between and be connected with described second public electrode
Secondary shielding layer, and described first screen layer and secondary shielding layer be independent；
Second transparency carrier is provided and is formed on pel array；
Liquid crystal layer is formed between the first transparency carrier and the second transparency carrier.
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