CN103186297B - A kind of capacitive touch liquid crystal display panel and liquid crystal indicator - Google Patents
A kind of capacitive touch liquid crystal display panel and liquid crystal indicator Download PDFInfo
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- CN103186297B CN103186297B CN201110446669.XA CN201110446669A CN103186297B CN 103186297 B CN103186297 B CN 103186297B CN 201110446669 A CN201110446669 A CN 201110446669A CN 103186297 B CN103186297 B CN 103186297B
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Abstract
The invention discloses a kind of capacitive touch liquid crystal display panel and liquid crystal indicator, this touch LCD display panel adopts IPS/FFS type of drive, and described capacitive touch liquid crystal display panel comprises and is arranged at described touch substrate towards the drive electrode of the side of liquid crystal layer and induction electrode; Be arranged at described array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and induction public electrode are connected to common electric voltage output terminal.This liquid crystal indicator comprises above-mentioned display panel.The setting of described display panel greatly increases and drives resistance between public electrode and induction public electrode and inductance, greatly reduce the driving stray capacitance by series connection that signal source sends and the AC signal responding to stray capacitance arrival testing circuit, thus larger basal signal can not be formed at testing circuit place, avoid and detect failed problem.
Description
Technical field
The invention belongs to field of liquid crystal display, particularly relate to a kind of capacitive touch liquid crystal display panel and apply the liquid crystal indicator of this capacitive touch liquid crystal display panel.
Background technology
Touch-screen inputs medium as one, is current the simplest, convenient, natural a kind of man-machine interaction mode.Therefore, touch-screen is more and more applied in various electronic product, such as mobile phone, notebook computer, MP3/MP4 etc.For reducing the cost of various electronic equipment, make various electronic equipment more frivolous, usual touch-screen is integrated in display panels.According to principle of work and the difference detecting touch information medium, touch-screen can be divided into resistance-type, condenser type, infrared-type and surface acoustic wave Four types.Capacitance-type touch screen technology is due to the touch screen technology that technique is simple, life of product is grown, transmittance high becomes current main flow.
As shown in Figure 1, Figure 2 and Figure 3; existing a kind of capacitive touch screen comprises: glass substrate 10; be arranged on the driving layer 11 on described glass substrate 10 surface; be arranged on the insulating medium layer 12 on described driving layer 11 surface; be arranged on the inductive layer 13 on described insulating medium layer 12 surface, and be arranged on the protective seam 14 on described inductive layer 13 surface.Described driving layer 11 comprises multiple drive electrode 111, each drive electrode 111 is brilliant, described multiple drive electrode 111 is regularly arranged at described glass substrate 10 on the surface, and respectively by drive wire 11a, 11b, 11c, 11d...... electrical connection that many are parallel to each other.Described inductive layer 13 comprises multiple induction electrode 131, each induction electrode 131 is brilliant, described multiple induction electrode 131 is regularly arranged at described insulating medium layer 12 on the surface, and respectively by the line of induction 13a, 13b, 13c13d...... electrical connection that many are parallel to each other.Described drive wire 11a, 11b, 11c, 11d...... and the described line of induction 13a, 13b, 13c13d...... orthogonal, and every bar line of induction is electrically connected with testing circuit by gating switch module 20.
Form mutual capacitance between induction electrode 131 and drive electrode 111, testing circuit, by measuring the change of the mutual capacitance of finger touching caused by touch-screen, obtains the particular location that finger touches touch-screen.
Its principle of work is specially: for drive wire 11a, drive wire 11a is applied with driving voltage 40, other drive wires 11b, 11c, 11d...... ground connection, line of induction 13a is connected with testing circuit 30 by gating switch 20, that now detect is drive wire 11a and line of induction 13a, finger touch is in the point of intersection of these two lines, have touching signals, then successively the line of induction 13b, 13c, 13d...... are connected with testing circuit 30 again by gating switch module 20, now detect the signal of drive wire 11a and the line of induction 13b, 13c, 13d...... point of intersection; Afterwards, driving voltage is applied successively to drive wire 11b, 11c, 11d......, drive drive wire 11b, 11c, 11d...... to complete driving process successively, complete the driving to all drive wire 11a, 11b, 11c, 11d...... and all line of induction 13a, 13b, 13c, 13d...... intersection points like this.
As shown in Figure 4, the equivalent electrical circuit of above-mentioned touch-screen comprises: the driving stray capacitance 54 of signal source 51, drive electrode resistance 52, mutual capacitance 53 between drive electrode and induction electrode, drive electrode self, the induction stray capacitance 60 of induction electrode self, induction electrode resistance 55 and testing circuit 56.Wherein, signal source 51 for applying drive singal on drive electrode; Testing circuit 56 is then for carrying out input.When finger touches touch-screen, some electric current flows into finger, and the change being equivalent to the mutual capacitance 53 between drive electrode and induction electrode changes, and detects that described mutual capacitance changes the change of the weak current caused from testing circuit 56.
The above is the touch screen structure of existing a kind of multi-layered electrode, namely drives layer and inductive layer to be positioned at different layers.
As shown in Figure 5, structure inductive layer and the driving layer of the another kind of single-layer electrodes touch-screen of prior art are positioned at same layer, wherein, layer is driven to comprise multiple drive electrode 71, and being regularly arranged into multiple rows of drive electrodes 71a, 71b, 71c, 71d, 71e and multiple drive electrode row, each rows of drive electrodes is coupled together by peripheral drive wire; Inductive layer comprises multiple induction electrode 72, and induction electrode 72 and each drive electrode arrange and are spaced, each drive electrode 71 and adjacent induction electrode 72 form mutual capacitance, and the principle of work of the touch-screen of single-layer electrodes and equivalent electrical circuit and double-layer touch screen principle of work are identical with equivalent electrical circuit.
In order to make the liquid crystal indicator with touch function more frivolous, field of liquid crystal display has developed In-cell touch panel technology, as shown in Figure 6, utilize In-cell touch panel technology with the liquid crystal indicator under the IPS pattern of touch function, comprise successively: TFT (ThineFilmTransistor, thin film transistor (TFT)) array base palte, liquid crystal layer 65 and CF (ColorFilter, colored filter) substrate, wherein tft array substrate comprises from the bottom to top successively: lower glass substrate 61, tft array layer 62, public electrode 63 and pixel electrode 64.In figure, pixel electrode 64 is positioned on public electrode 63 and is only a kind of optional embodiment, and in addition, public electrode can be positioned on pixel electrode, or public electrode can be positioned at same layer with pixel electrode; CF substrate comprises from the bottom to top successively: insulating medium layer 66 (or adopting colored filter as medium), touch electrode 67 and upper substrate glass 68.
Wherein, touch electrode 66 can be multilayer touch electrode or single-layer touch electrode, and between described touch electrode 66 and common electrode layer 64, spacing is several microns, because spacing is less, can form larger stray capacitance between touch electrode 66 and common electrode layer 64.
The above-mentioned In-cell touch panel technology that utilizes is with the equivalent circuit diagram of the liquid crystal indicator under the IPS pattern of touch function, as shown in Figure 7, the AC signal that signal source 51 sends, described AC signal is through drive electrode resistance 52, mutual capacitance 53 and induction electrode resistance 55 enter testing circuit 56, but when driving stray capacitance 54 and induction stray capacitance 60 is larger, for the AC signal that signal source 51 sends, drive the capacitive reactance of stray capacitance 54 and induction stray capacitance 60 less, public electrode resistance 57 and public electrode inductance 58 then hinder AC signal stream ground end, therefore AC signal is successively by driving stray capacitance 54 that capacitive reactance is less, induction stray capacitance 60, form current path 58, AC signal is by after described current path 58, larger basal signal can be formed at testing circuit 56 place.The signal corresponding due to mutual capacitance change is usually less, is easily submerged in larger basal signal, makes testing circuit 56 be difficult to signal corresponding to detection place mutual capacitance change, causes and detect unsuccessfully.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of capacitive touch liquid crystal display panel, be submerged in basal signal greatly with the signal solving existing capacitive touch liquid crystal display panel mutual capacitance change corresponding, cause and detect failed problem.
This capacitive touch liquid crystal display panel adopts IPS/FFS type of drive, comprising:
Touch array base palte that substrate and described touch substrate be oppositely arranged, be arranged at liquid crystal layer between described touch substrate and described array base palte, described capacitive touch liquid crystal display panel comprises:
Be arranged at described touch substrate towards the drive electrode of the side of liquid crystal layer and induction electrode;
Be arranged at described array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and described drive electrode are oppositely arranged, described induction public electrode and induction electrode are oppositely arranged, and described driving public electrode and induction public electrode are connected to common electric voltage output terminal.
Preferably, described drive electrode and induction electrode are specifically set to:
Described drive electrode and induction electrode are arranged on same layer, multiple drive electrode forms rows of drive electrodes and drive electrode row, described induction electrode comprises multiple strip shaped electric poles, is provided with drive electrode row between every two strip shaped electric poles, is provided with strip shaped electric poles between every two drive electrodes row.
Preferably, the drive electrode in same rows of drive electrodes is electrically connected by peripheral leads.
Preferably, described drive electrode is rectangle.
Preferably, described display panel also comprises:
Be arranged on the thin film transistor (TFT) on described array base palte, gate line, data line and pixel electrode, described thin film transistor (TFT) comprises grid, source electrode and drain electrode, described drain electrode and pixel electrode electrical connection, described grid and gate line electrical connection, described source electrode and data line electrical connection.
Preferably, described display panel is specifically set to:
Described pixel electrode is arranged on described array base palte;
Described pixel electrode surface is also coated with insulation course;
Described driving public electrode and induction public electrode are arranged on described surface of insulating layer.
Preferably, in a pixel region, described driving public electrode and induction public electrode are strip shaped electric poles, and the slit between described strip shaped electric poles is described driving public electrode and the passage responding to electric field between public electrode and pixel electrode.
Preferably, described display panel is specifically set to:
Described driving public electrode and induction public electrode are arranged on described array base palte;
Described driving public electrode and induction public electrode are also coated with insulation course on the surface;
Described pixel electrode is arranged on described surface of insulating layer.
Preferably, described pixel electrode is strip shaped electric poles.
Preferably, described display panel is specifically set to:
Described driving public electrode and induction public electrode are arranged on described array base palte;
Described pixel electrode and described driving public electrode and respond to public electrode and be arranged on same layer.
Preferably, described driving public electrode, induction public electrode and pixel electrode are comb teeth-shaped, and in a pixel region, the comb of comb teeth-shaped pixel electrode and driving public electrode is engaged mutually or the comb of comb teeth-shaped pixel electrode and induction public electrode is engaged mutually.
Preferably, described display panel also comprises:
Be arranged on the color filter film touched on substrate.
Preferably, described display panel also comprises:
Drive connecting line and induction connecting line, driving public electrode is connected to described common electric voltage output terminal by described driving connecting line, and described induction public electrode is connected to described common electric voltage output terminal by described induction connecting line.
A kind of liquid crystal indicator, described liquid crystal indicator comprises above-mentioned display panel.
Preferably, described liquid crystal indicator also comprises:
Flexible printed circuit board, described flexible printed circuit board specifically comprises:
Common electric voltage generation module, described common electric voltage generation module produces common electric voltage, and is provided with common electric voltage output terminal;
First connecting line, described first connecting line connects common electric voltage output terminal and drives connecting line;
Second connecting line, described second connecting line connects common electric voltage output terminal and induction connecting line.
Preferably, described flexible printed circuit board also comprises:
Touch electrode module, described touch electrode module is to touch substrate output drive signal and detection signal.
Preferably, described common electric voltage generation module and touch electrode module integration are in same chip.
Preferably, described chip also comprises:
First voltage output end and the second voltage output end, described first voltage output end and the second voltage output end are connected the common electric voltage output terminal of described common electric voltage generation module respectively, wherein, the first voltage output end is connected to the first connecting line, and the second voltage output end is connected to the second connecting line.
Preferably, described common electric voltage output terminal is earth terminal.
Preferably, described common electric voltage output terminal is an interchange common electric voltage output terminal.
Preferably, described common electric voltage output terminal is a direct current common electric voltage output terminal.
Capacitive touch liquid crystal display panel of the present invention adopts IPS/FFS type of drive, be arranged at described capacitive touch liquid crystal display panel array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and described drive electrode are oppositely arranged, described induction public electrode and induction electrode are oppositely arranged, described driving public electrode and induction public electrode are connected to common electric voltage output terminal, namely drive public electrode and respond to public electrode separate, and described driving public electrode and drive electrode are formed and drive stray capacitance, described induction public electrode and induction electrode are formed responds to stray capacitance, greatly increase the resistance between driving public electrode and induction public electrode and inductance, greatly reduce the driving stray capacitance by series connection that signal source sends and the AC signal responding to stray capacitance arrival testing circuit, thus larger basal signal can not be formed at testing circuit place, and then can avoid detecting failed problem.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the cross-sectional view of prior art capacitive touch screen;
Fig. 2 is the structural representation that prior art capacitive touch screen drives layer;
Fig. 3 is the structural representation of prior art capacitive touch screen inductive layer;
Fig. 4 is prior art capacitive touch screen schematic equivalent circuit;
Fig. 5 is the structural representation of existing a kind of single-layer electrodes touch-screen;
Fig. 6 utilizes In-cell touch panel technology with the liquid crystal indicator schematic diagram under the IPS pattern of touch function;
Fig. 7 utilizes In-cell touch panel technology with the equivalent circuit diagram of the liquid crystal indicator under the IPS pattern of touch function;
Fig. 8 is the structural representation of capacitive touch liquid crystal display panel of the present invention;
Fig. 9 is capacitive touch liquid crystal display panel equivalent circuit diagram of the present invention;
Figure 10 is LCD device structure schematic diagram of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As described in background, the signal of existing capacitive touch liquid crystal display panel mutual capacitance change correspondence is submerged in basal signal greatly, causes and detects unsuccessfully.
Inventor finds after deliberation, larger stray capacitance can be formed between touch electrode and common electrode layer, except the reason that the spacing of touch electrode and common electrode layer is less, the mode of connection of common electrode layer also can affect the stray capacitance between touch electrode and common electrode layer.
The invention discloses a kind of capacitance touch display panel, this capacitive touch liquid crystal display panel adopts IPS/FFS type of drive, comprising:
Touch array base palte that substrate and described touch substrate be oppositely arranged, be arranged at liquid crystal layer between described touch substrate and described array base palte, described capacitive touch liquid crystal display panel comprises:
Be arranged at described touch substrate towards the drive electrode of the side of liquid crystal layer and induction electrode;
Be arranged at described array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and described drive electrode are oppositely arranged, described induction public electrode and induction electrode are oppositely arranged, and described driving public electrode and induction public electrode are connected to common electric voltage output terminal.
As can be seen from the above scheme, drive public electrode and respond to public electrode separate, and described driving public electrode and drive electrode are formed and drive stray capacitance, described induction public electrode and induction electrode are formed responds to stray capacitance, greatly increase the resistance between driving public electrode and induction public electrode and inductance, greatly reduce the driving stray capacitance by series connection that signal source sends and the AC signal responding to stray capacitance arrival testing circuit, thus larger basal signal can not be formed at testing circuit place, and then can avoid detecting failed problem.
It is more than the core concept of the application, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
Embodiment one:
Present embodiment discloses a kind of capacitive touch liquid crystal display panel, this touch LCD display panel adopts IPS/FFS type of drive, comprise touch substrate and described touch substrate and be oppositely arranged array base palte, be arranged at liquid crystal layer between described touch substrate and described array base palte, it is characterized in that, described capacitive touch liquid crystal display panel also comprises:
Be arranged at described touch substrate towards the drive electrode of the side of liquid crystal layer and induction electrode;
Be arranged at described array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and described drive electrode are oppositely arranged, described induction public electrode and induction electrode are oppositely arranged, and described driving public electrode and induction public electrode are connected to common electric voltage output terminal.
As shown in Figure 8, drive electrode 101 and the induction electrode 102 of described capacitive touch liquid crystal display panel are arranged on same layer, make material and are preferably tin indium oxide or indium zinc oxide.Described drive electrode 101 is rectangle, and multiple drive electrode forms rows of drive electrodes 101H and drive electrode row 101L, described induction electrode 102 comprises multiple strip shaped electric poles, drive electrode row 101L is provided with between every two strip shaped electric poles, be provided with strip shaped electric poles between every two drive electrode row 101L, the drive electrode 101 in described rows of drive electrodes 101H is electrically connected by peripheral leads 103.
Be arranged at described array base palte towards the driving public electrode 202 be separated from each other of the side of liquid crystal layer 306 and induction public electrode 203, described driving public electrode 202 is oppositely arranged with described drive electrode 101, described induction public electrode 203 is oppositely arranged with induction electrode 102, be specially, described driving public electrode 202 is right against drive electrode row 101L and arranges, the induction electrode 102 that described induction public electrode 203 is right against strip is arranged, and described driving public electrode 202 and induction public electrode 203 are connected to common electric voltage output terminal Vs.
The array base palte of described display panel specifically comprises:
Be arranged on thin film transistor (TFT), gate line, the data line on described infrabasal plate 301 (being generally glass substrate), described thin film transistor (TFT) comprises grid, source electrode and drain electrode, described grid and gate line electrical connection, described source electrode and data line electrical connection, described thin film transistor (TFT), gate line, data line are referred to as tft layer 302.
Passivation layer 303, described passivation layer 303 covers on described tft layer 302, and is provided with via hole in described passivation layer 303.
Pixel electrode 304, described pixel electrode 304 is arranged on described array base palte, is specifically arranged on described passivation layer 303 on the surface, in a pixel region, described pixel electrode 304 is strip shaped electric poles, and described pixel electrode 304 is electrically connected with drain electrode by the via hole in passivation layer 303.
Insulation course 305, described insulation course 305 covers described pixel electrode 304 on the surface.
Described driving public electrode 202 and induction public electrode 203 are arranged on described insulation course 305 on the surface, in a pixel region, described driving public electrode 202 and induction public electrode 203 are strip public electrode, and the slit between described strip public electrode is described driving public electrode 202 and the passage responding to electric field between public electrode 203 and pixel electrode 304.
In addition, described display panel specifically arranges and can also be:
Described driving public electrode and induction public electrode are arranged on described passivation layer 303;
Described driving public electrode and induction public electrode are also coated with insulation course on the surface;
Described pixel electrode is arranged on described surface of insulating layer.
In addition, described display panel specifically arranges and can also be:
Described driving public electrode and induction public electrode are arranged on described passivation layer 303;
Described pixel electrode and described driving public electrode and respond to public electrode and be arranged on same layer.
Now, described driving public electrode, induction public electrode and pixel electrode are comb teeth-shaped, and in a pixel region, the comb of comb teeth-shaped pixel electrode and driving public electrode is engaged mutually or the comb of comb teeth-shaped pixel electrode and induction public electrode is engaged mutually.
The touch substrate of described display panel specifically comprises:
Be arranged on the color filter film 307 touched on substrate, described color filter film 307 is specifically arranged on drive electrode 101 and induction electrode 102 on the surface, described drive electrode 101 and induction electrode 102 are arranged on upper substrate 308 (being generally glass substrate), and described drive electrode 101 is formed through etching to be separated by same layer electrode with induction electrode 102.
Drive connecting line D and induction connecting line S, driving public electrode 202 is connected to described common electric voltage output terminal Vs by described driving connecting line D, and described induction public electrode 203 is connected to described common electric voltage output terminal Vs by described induction connecting line S.
In conjunction with the equivalent circuit diagram of described display panel, as shown in Figure 9, common electric voltage output terminal Vs holds with being, public electrode 202 and induction public electrode 203 is driven to be connected to common electric voltage output terminal Vs, drive public electrode 202 and drive electrode 101 to be formed and drive stray capacitance C1, induction public electrode 203 is formed with induction electrode 102 responds to stray capacitance C2, so drive stray capacitance C1 successively with driving public electrode resistance R1, public electrode inductance L 1 is driven to connect, then be connected with common electric voltage output terminal Vs, similar, induction stray capacitance C2 successively with induction public electrode resistance R2, induction public electrode inductance L 2 is connected, then be connected with common electric voltage output terminal Vs.
When driving detection is carried out to mutual capacitance C, the AC signal that signal source 71 sends is after drive electrode resistance R1, major part AC signal is by mutual capacitance C, induction electrode resistance R2 arrives testing circuit 72, small part AC signal is successively by driving stray capacitance C1, drive public electrode resistance R3, public electrode inductance L 1 is driven to import common electric voltage output terminal Vs, or, small part AC signal is successively by induction stray capacitance C2, induction public electrode resistance R4, induction public electrode inductance L 2 imports common electric voltage output terminal Vs, described common electric voltage output terminal Vs ground connection.Setting like this, the public electrode resistance between public electrode 202 and induction public electrode 203 and inductance is driven to considerably increase, and then make to drive the resistance in series between stray capacitance C1 and induction stray capacitance C2 and inductance (to comprise and drive public electrode resistance R3, drive public electrode inductance L 1, induction public electrode resistance R4, induction public electrode inductance L 2) considerably increase, the AC signal that the driving stray capacitance C1 by series connection that signal source 71 sends and induction stray capacitance C2 arrives testing circuit 72 reduces greatly, at testing circuit 72, place also there will not be larger basal signal, testing circuit 72 detect mainly by the AC signal of mutual capacitance C, thus the change of the AC signal caused by mutual capacitance C change can be detected more accurately, and then avoid existing capacitive touch liquid crystal display panel to be submerged in the problem of the detection failure caused in basal signal greatly because of signal that mutual capacitance change is corresponding.
Embodiment two:
Present embodiment discloses a kind of liquid crystal indicator, described liquid crystal indicator comprises the display panel described in above-described embodiment.
As shown in Figure 10, described liquid crystal indicator also comprises: common electric voltage generation module 401, first connecting line 402, second connecting line 403.
Wherein, described common electric voltage generation module 401 produces common electric voltage, and be provided with common electric voltage output terminal Vs in described common electric voltage generation module 401, described first connecting line 402 connects common electric voltage output terminal Vs and drives connecting line D, described second connecting line 403 connects common electric voltage output terminal Vs and induction connecting line S, and described common electric voltage generation module 401, first connecting line 402, second connecting line 403 is all arranged in flexible printed circuit board 400.
Described flexible printed circuit board 400 also comprises:
Touch electrode module 404, described touch electrode module 404 is connected (not shown annexation) with touch substrate, and to touch substrate output drive signal and detection signal, described touch electrode module 404 and common electric voltage generation module 401 are integrated in the same chip be arranged in flexible printed circuit board 400.
Also comprise in described chip 400:
First voltage output end Vs1 and the second voltage output end Vs2, described first voltage output end Vs1 and the second voltage output end Vs2 are connected the common electric voltage output terminal Vs of described common electric voltage generation module 401 respectively, wherein, first voltage output end Vs1 is connected to the first connecting line 402, second voltage output end Vs2 and is connected to the second connecting line 403.
It should be noted that, described common electric voltage output terminal Vs is earth terminal, and described common electric voltage output terminal Vs is set to an interchange common electric voltage output terminal or a direct current common electric voltage output terminal as the case may be, is not specifically limited at this.
Liquid crystal indicator described in the present embodiment includes display panel described in embodiment one, and drive the driving connecting line of public electrode to be connected to the first voltage output end by the first connecting line arranged in liquid crystal indicator described in the present embodiment, and conducting is to common electric voltage output terminal, ground connection; The induction connecting line of induction public electrode is connected to the second voltage output end by the second connecting line arranged in liquid crystal indicator described in the present embodiment, and conducting is to common electric voltage output terminal, ground connection.
Visible, drive public electrode and induction public electrode respectively through independently circuit access common electric voltage output terminal described in the present embodiment, ground connection, increase the resistance between driving public electrode and induction public electrode and inductance, reduce the driving stray capacitance by series connection that signal source sends and the AC signal responding to stray capacitance arrival testing circuit, improve the sensitivity touching and detect, avoid existing capacitive touch liquid crystal display panel because of signal that mutual capacitance change is corresponding be submerged in greatly basal signal in the problem of detection failure that causes.
In this instructions, various piece adopts the mode of going forward one by one to describe, and what each some importance illustrated is the difference with other parts, between various piece identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (21)
1. a capacitive touch liquid crystal display panel, this touch LCD display panel adopts IPS/FFS type of drive, comprise touch substrate and described touch substrate and be oppositely arranged array base palte, be arranged at liquid crystal layer between described touch substrate and described array base palte, it is characterized in that, described capacitive touch liquid crystal display panel comprises:
Be arranged at described touch substrate towards the drive electrode of the side of liquid crystal layer and induction electrode;
Be arranged at described array base palte towards the driving public electrode be separated from each other of the side of liquid crystal layer and induction public electrode, described driving public electrode and described drive electrode are oppositely arranged, described induction public electrode and induction electrode are oppositely arranged, and described driving public electrode and induction public electrode are connected to common electric voltage output terminal.
2. display panel according to claim 1, it is characterized in that, described drive electrode and induction electrode are specifically set to:
Described drive electrode and induction electrode are arranged on same layer, multiple drive electrode forms rows of drive electrodes and drive electrode row, described induction electrode comprises multiple strip shaped electric poles, is provided with drive electrode row between every two strip shaped electric poles, is provided with strip shaped electric poles between every two drive electrodes row.
3. display panel according to claim 2, it is characterized in that, the drive electrode in same rows of drive electrodes is electrically connected by peripheral leads.
4. display panel according to claim 3, it is characterized in that, described drive electrode is rectangle.
5. display panel according to claim 4, it is characterized in that, described display panel also comprises:
Be arranged on the thin film transistor (TFT) on described array base palte, gate line, data line and pixel electrode, described thin film transistor (TFT) comprises grid, source electrode and drain electrode, described drain electrode and pixel electrode electrical connection, described grid and gate line electrical connection, described source electrode and data line electrical connection.
6. display panel according to claim 5, it is characterized in that, described display panel is specifically set to:
Described pixel electrode is arranged on described array base palte;
Described pixel electrode surface is also coated with insulation course;
Described driving public electrode and induction public electrode are arranged on described surface of insulating layer.
7. display panel according to claim 6, it is characterized in that, in a pixel region, described driving public electrode and induction public electrode are strip shaped electric poles, and the slit between described strip shaped electric poles is described driving public electrode and the passage responding to electric field between public electrode and pixel electrode.
8. display panel according to claim 5, it is characterized in that, described display panel is specifically set to:
Described driving public electrode and induction public electrode are arranged on described array base palte;
Described driving public electrode and induction public electrode are also coated with insulation course on the surface;
Described pixel electrode is arranged on described surface of insulating layer.
9. display panel according to claim 8, it is characterized in that, described pixel electrode is strip shaped electric poles.
10. display panel according to claim 5, it is characterized in that, described display panel is specifically set to:
Described driving public electrode and induction public electrode are arranged on described array base palte;
Described pixel electrode and described driving public electrode and respond to public electrode and be arranged on same layer.
11. display panels according to claim 10, it is characterized in that, described driving public electrode, induction public electrode and pixel electrode are comb teeth-shaped, and in a pixel region, the comb of comb teeth-shaped pixel electrode and driving public electrode is engaged mutually or the comb of comb teeth-shaped pixel electrode and induction public electrode is engaged mutually.
12., according to display panel described in claim 11, is characterized in that, described display panel also comprises:
Be arranged on the color filter film touched on substrate.
13., according to display panel described in claim 12, is characterized in that, described display panel also comprises:
Drive connecting line and induction connecting line, driving public electrode is connected to described common electric voltage output terminal by described driving connecting line, and described induction public electrode is connected to described common electric voltage output terminal by described induction connecting line.
14. 1 kinds of liquid crystal indicators, is characterized in that, described liquid crystal indicator comprises the display panel described in the arbitrary claim of claim 1 ~ 13.
15., according to liquid crystal indicator described in claim 14, is characterized in that, described liquid crystal indicator also comprises:
Flexible printed circuit board, described flexible printed circuit board specifically comprises:
Common electric voltage generation module, described common electric voltage generation module produces common electric voltage, and is provided with common electric voltage output terminal;
First connecting line, described first connecting line connects common electric voltage output terminal and drives connecting line;
Second connecting line, described second connecting line connects common electric voltage output terminal and induction connecting line.
16., according to liquid crystal indicator described in claim 15, is characterized in that, described flexible printed circuit board also comprises:
Touch electrode module, described touch electrode module is to touch substrate output drive signal and detection signal.
17., according to liquid crystal indicator described in claim 16, is characterized in that, described common electric voltage generation module and touch electrode module integration are in same chip.
18., according to liquid crystal indicator described in claim 17, is characterized in that, described chip also comprises:
First voltage output end and the second voltage output end, described first voltage output end and the second voltage output end are connected the common electric voltage output terminal of described common electric voltage generation module respectively, wherein, the first voltage output end is connected to the first connecting line, and the second voltage output end is connected to the second connecting line.
19., according to liquid crystal indicator described in claim 18, is characterized in that, described common electric voltage output terminal is earth terminal.
20., according to liquid crystal indicator described in claim 19, is characterized in that, described common electric voltage output terminal is an interchange common electric voltage output terminal.
21., according to liquid crystal indicator described in claim 19, is characterized in that, described common electric voltage output terminal is a direct current common electric voltage output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110446669.XA CN103186297B (en) | 2011-12-27 | 2011-12-27 | A kind of capacitive touch liquid crystal display panel and liquid crystal indicator |
Applications Claiming Priority (1)
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| CN103186299B (en) * | 2011-12-30 | 2016-09-07 | 上海天马微电子有限公司 | Embedded touch display device |
| CN104656297B (en) * | 2013-11-19 | 2017-06-13 | 苏州汉朗光电有限公司 | Touch controlled type smectic liquid crystal display |
| KR101642257B1 (en) * | 2014-06-30 | 2016-07-26 | 엘지디스플레이 주식회사 | Display device integrated with touch screen |
| US10261622B2 (en) | 2016-10-10 | 2019-04-16 | Microsoft Technology Licensing, Llc | Ground reference floating in a touch-sensitive display |
| CN106510107A (en) * | 2016-11-29 | 2017-03-22 | 成都聚智工业设计有限公司 | Wearable bracelet with liquid crystal display screen |
| JP7253343B2 (en) * | 2018-09-14 | 2023-04-06 | Koa株式会社 | current detector |
| CN111739425B (en) * | 2020-06-30 | 2022-07-08 | 昆山国显光电有限公司 | Display panel and display device |
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| CN102109690A (en) * | 2009-12-25 | 2011-06-29 | 上海天马微电子有限公司 | Embedded touch-screen LCD (liquid crystal display) device and control method |
| CN102213852A (en) * | 2010-04-09 | 2011-10-12 | 上海天马微电子有限公司 | Touch displaying device and manufacturing method thereof |
| CN102221755A (en) * | 2010-04-14 | 2011-10-19 | 上海天马微电子有限公司 | Embedded touch screen and formation method thereof |
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| CN102109690A (en) * | 2009-12-25 | 2011-06-29 | 上海天马微电子有限公司 | Embedded touch-screen LCD (liquid crystal display) device and control method |
| CN102213852A (en) * | 2010-04-09 | 2011-10-12 | 上海天马微电子有限公司 | Touch displaying device and manufacturing method thereof |
| CN102221755A (en) * | 2010-04-14 | 2011-10-19 | 上海天马微电子有限公司 | Embedded touch screen and formation method thereof |
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