CN103105989B - A kind of capacitance type in-cell touch panel and display device - Google Patents
A kind of capacitance type in-cell touch panel and display device Download PDFInfo
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- CN103105989B CN103105989B CN201310026384.XA CN201310026384A CN103105989B CN 103105989 B CN103105989 B CN 103105989B CN 201310026384 A CN201310026384 A CN 201310026384A CN 103105989 B CN103105989 B CN 103105989B
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Abstract
The invention discloses a kind of capacitance type in-cell touch panel and display device, using the signal line in tft array substrate as touch-control drive wire, in tft array substrate adjacent column pixel cell between touch induction lines is set, and touch control unit is set at the overlapping place of touch-control sweep trace and touch induction lines, wherein, each touch control unit is by the touch-control sensing electrode be electrical connected with touch induction lines, and formed by the touch-control drive electrode that touch switch unit and touch-control sweep trace are electrical connected, to realize the function of touch-screen.Owing to using signal line to input gated sweep signal as the drive singal of touch-control as touch-control sweep trace to the touch-control drive electrode in touch control unit, realize touch controllable function, can avoid increasing the IC driven for touch-control, save cost of manufacture.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of capacitance type in-cell touch panel and display device.Background technology
Along with the develop rapidly of display technique, touch-screen (Touch Screen Panel) is gradually in the life of people.At present, touch-screen can be divided into according to composition structure: external hanging type touch-screen (Add on ModeTouch Panel), covering surfaces formula touch-screen (On Cell Touch Panel) and In-cell touch panel (InCell Touch Panel).Wherein, external hanging type touch-screen is by touch-screen and LCDs (Liquid CrystalDisplay, LCD) separately produce, then fitting to the LCDs becoming together and have touch function, there is the shortcomings such as cost of manufacture is higher, light transmission rate is lower, module is thicker in external hanging type touch-screen.And the touch control electrode of touch-screen is embedded in LCDs inside by In-cell touch panel, can the thickness of thinning module entirety, greatly can reduce again the cost of manufacture of touch-screen, be subject to the favor of Ge great panel producer.
At present, existing Capacitance-type built-in (In cell) touch-screen is at existing TFT(Thin FilmTransistor, Thin Film Transistor (TFT)) array base palte directly increases in addition touch-control sweep trace and touch induction lines realize, namely the stripe-like ITO electrodes that two-layer mutual antarafacial intersects is made on the surface of tft array substrate, this two-layer ITO(Indium Tin Oxides, indium tin metal oxide) electrode respectively as the touch-control drive wire of touch-screen and touch induction lines, form inductance capacitance in the antarafacial intersection of two ITO electrode.Its course of work is: when loading touch-control drive singal to the ITO electrode as touch-control drive wire, detect the voltage signal that touch induction lines is coupled out by inductance capacitance, in the process, when having human contact's touch-screen, human body electric field will act on inductance capacitance, and the capacitance of inductance capacitance is changed, and then the voltage signal that change touch induction lines is coupled out, according to the change of voltage signal, just contact position can be determined.
The structural design of above-mentioned capacitance type in-cell touch panel, need to utilize two driving chip (IC) to realize touch-control respectively simultaneously and drive and display driver, cost is higher.
Summary of the invention
Embodiments provide a kind of capacitance type in-cell touch panel and display device, in order to realize lower-cost capacitance type in-cell touch panel.
A kind of capacitance type in-cell touch panel that the embodiment of the present invention provides, comprises the tft array substrate with signal line, and in described tft array substrate, be provided with multiple pixel cells of the arrangement in matrix;
Described tft array substrate has the touch induction lines between the pixel cell of adjacent column;
At least one signal line in tft array substrate is as touch-control sweep trace;
Described tft array substrate has the touch control unit at the overlapping place being positioned at described touch-control sweep trace and touch induction lines; Wherein,
Each touch control unit by the touch-control sensing electrode be electrical connected with adjacent touch induction lines, and consists of the touch-control drive electrode that touch switch unit and adjacent touch-control sweep trace are electrical connected; Described touch switch unit is used for when the touch-control sweep trace be electrical connected with described touch switch unit loads gated sweep signal, the touch-control drive electrode that conducting is connected with described touch switch unit and touch-control sweep trace.
A kind of display device that the embodiment of the present invention provides, comprises the capacitance type in-cell touch panel that the embodiment of the present invention provides.
The beneficial effect of the embodiment of the present invention comprises:
A kind of capacitance type in-cell touch panel that the embodiment of the present invention provides and display device, using the signal line in tft array substrate as touch-control drive wire, in tft array substrate adjacent column pixel cell between touch induction lines is set, and touch control unit is set at the overlapping place of touch-control sweep trace and touch induction lines, wherein, each touch control unit is by the touch-control sensing electrode be electrical connected with touch induction lines, and formed by the touch-control drive electrode that touch switch unit and touch-control sweep trace are electrical connected, realize the function of touch-screen.Owing to using signal line to input gated sweep signal as the driving sweep signal of touch-control as touch-control sweep trace to the touch-control drive electrode in touch control unit, realize touch controllable function, can avoid increasing the IC driven for touch-control, save cost of manufacture.
Accompanying drawing explanation
The structural representation of tft array substrate in the embedding touch-screen that Fig. 1 provides for the embodiment of the present invention;
The partial enlarged drawing of part A in the tft array substrate that Fig. 2 provides for Fig. 1;
The structural representation of the capacitance type in-cell touch panel that Fig. 3 provides for the embodiment of the present invention;
The STRUCTURE DECOMPOSITION schematic diagram of the capacitance type in-cell touch panel that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 a and 5b is respectively the schematic diagram of touch control unit before touch-control and in touch-control that the embodiment of the present invention provides;
The structural representation of the touch control unit that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the capacitance type in-cell touch panel provide the embodiment of the present invention and the embodiment of display device are described in detail.
In accompanying drawing, each layer film thickness and shape do not reflect the actual proportions of tft array substrate or color membrane substrates, and object just signal illustrates content of the present invention.
A kind of capacitance type in-cell touch panel that the embodiment of the present invention provides, as shown in Figure 1, comprises the tft array substrate with signal line 01, and in tft array substrate, be provided with multiple pixel cells 02 of the arrangement in matrix;
Tft array substrate has the touch induction lines 03 between the pixel cell of adjacent column;
At least one signal line 01 in tft array substrate is as touch-control sweep trace 04;
Tft array substrate has the touch control unit at the overlapping place being positioned at touch-control sweep trace 04 and touch induction lines 03; Wherein, as shown in Figure 2,
Each touch control unit by the touch-control sensing electrode 05 be electrical connected with adjacent touch induction lines 03, and consists of the touch-control drive electrode 07 that touch switch unit 06 and adjacent touch-control sweep trace 04 are electrical connected; When touch switch unit 06 is for loading gated sweep signal at the touch-control sweep trace 04 be electrical connected with touch switch unit 06, the touch-control drive electrode 07 that conducting is connected with touch switch unit 06 and touch-control sweep trace 04.
Above-mentioned capacitance type in-cell touch panel provided by the invention, using the signal line in tft array substrate as touch-control drive wire, in tft array substrate adjacent column pixel cell between touch induction lines is set, and touch control unit is set at the overlapping place of touch-control sweep trace and touch induction lines, wherein, each touch control unit is by the touch-control sensing electrode be electrical connected with touch induction lines, and formed by the touch-control drive electrode that touch switch unit and touch-control sweep trace are electrical connected, to realize the function of touch-screen.Owing to using signal line to input gated sweep signal as the drive singal of touch-control as touch-control sweep trace to the touch-control drive electrode in touch control unit, realize touch controllable function, can avoid increasing the IC driven for touch-control, save cost of manufacture.
Further, in the above-mentioned capacitance type in-cell touch panel that the embodiment of the present invention provides, as shown in Figure 3, can also comprise: be arranged at above tft array substrate and identical with tft array substrate size color membrane substrates;
The one side of this color membrane substrates tft array substrate dorsad has the screen layer for electric field shielding;
This screen layer is being at least open area with touch control unit corresponding region, namely at the region pattern-free of the corresponding touch control unit of screen layer, patternless region, in Fig. 3 shown in dotted line frame, certainly can also arrange open area in other regions as required in screen layer, not limit at this.
In the specific implementation, the material of this screen layer can be ITO, and screen layer can shield the interference of external electrical field, as shown in the STRUCTURE DECOMPOSITION schematic diagram of Fig. 4, at the region pattern-free (namely putting in a skylight) that screen layer is corresponding with touch control unit, human body electric field can be applied on touch control unit by skylight.
Particularly, as shown in Figure 5 a, before touch-control, between the touch-control sensing electrode of composition touch control unit and touch-control drive electrode, there is coupling capacitance Co; As shown in Figure 5 b, when touch-control, because human body electric field effect to act in touch control unit on touch-control sensing electrode and touch-control drive electrode respectively, capacitance between touch-control sensing electrode and touch-control drive electrode is changed Co → Co+ △ C, now, contact can be determined whether there is by the change in voltage of touch-control sensing electrode.
Particularly, by test and the change in voltage of the touch induction lines of touch-control sensing Electrode connection can obtain lateral coordinates and the x direction coordinate of touch point by column, and by can obtain the longitudinal coordinate y direction coordinate of touch point to the monitoring as the gated sweep signal that the signal line of touch-control sweep trace loads, thus obtain the position of touch.
Preferably, in the specific implementation, can be TFT device for connecting the touch switch unit of the touch-control drive electrode in touch control unit and corresponding touch-control sweep trace, wherein, grid and the drain electrode of TFT device are electrical connected with touch-control sweep trace simultaneously, i.e. grid and drain electrode short circuit, source electrode and touch-control drive electrode are electrical connected.All parts as the TFT device of touch switch unit can be prepared with layer with each parts of existing pixel TFT device in tft array substrate, new preparation technology need not be increased like this, only need the composition changing corresponding each rete to realize, also would not increase the cost of manufacture of the tft array substrate as touch-screen.
Adopt the TFT device of grid and drain electrode short circuit as touch switch unit, can ensure only when the gated sweep signal of touch-control sweep trace loading is noble potential, gated sweep signal just can flow into corresponding touch-control drive electrode as the drive singal of touch-control, and when the gated sweep signal that touch-control sweep trace loads is electronegative potential, gated sweep signal can not flow in corresponding touch-control drive electrode as the drive singal of touch-control, this ensure that only has the touch-control drive electrode of a line to open at synchronization, thus ensures the uniqueness of the longitudinal coordinate of position of touch.
Usually, the touch accuracy of touch-screen is usually at grade, and the display precision of tft array substrate is usually at micron order, can find out, drive wire (data signal line and signal line) needed for touch-control sweep trace needed for touch screen and touch induction lines show than tft array substrate is few many, therefore, in the capacitance type in-cell touch panel that the embodiment of the present invention provides, when setting touch sweep trace and touch induction lines, generally be set to identical by the spacing between each touch-control sweep trace, the spacing between each touch induction lines is set to identical.Such as shown in Fig. 1, two, interval pixel cell between each touch-control sweep trace, two, interval pixel cell between each touch-control drive wire.
Best, can the spacing between each touch-control sweep trace be set to identical with the spacing between each touch induction lines, to unify the touch accuracy of touch-screen.
Further, when realizing the touch induction lines between the pixel cell of adjacent column in tft array substrate, data signal line in each touch induction lines and tft array substrate can be arranged and mutually insulated with layer, namely while each data signal line of preparation, the touch induction lines with its mutually insulated is prepared, like this, do not need when preparing tft array substrate to increase extra preparation section, only need the figure that can be formed data signal line and touch induction lines by patterning processes, preparation cost can be saved, improving product added value.Certainly can prepare touch induction lines and data signal line respectively, not limit at this.
Particularly, the above-mentioned touch-screen that the embodiment of the present invention provides, when the overlapping place of touch-control sweep trace and touch induction lines arranges touch control unit, can adopt metal or transparent conductive oxide as the material of touch-control sensing electrode or touch-control drive electrode.
Preferably, in the specific implementation, touch-control sensing electrode and the touch-control drive electrode of each touch control unit can be arranged with layer, also can arrange by different layer, as long as can form capacitance structure both ensureing.All be set to example with the touch-control sensing electrode of each touch control unit and touch-control drive electrode with layer be described below.
When touch-control sensing electrode and touch-control drive electrode adopt transparent conductive oxide to prepare, touch control unit can be prepared with layer with the pixel electrode in tft array substrate and mutually insulated both needing to ensure; When touch-control sensing electrode and touch-control drive electrode adopt preparation of metals, touch control unit can be prepared with layer with the source-drain electrode of the TFT device in tft array substrate and mutually insulated both ensureing, therefore not to repeat here.
Because each touch control unit is only arranged at the overlapping place of touch-control sweep trace and touch induction lines, be the aperture opening ratio ensureing touch-screen, it is smaller that the touch-control area of each touch control unit can be arranged, and this is unfavorable for improving touch-control sensitivity.Therefore, preferably, in the touch-screen that the embodiment of the present invention provides, as shown in Figure 6, can also comprise: at least one the first touch-control sub-electrode 08 be electrical connected with touch-control sensing electrode 05, and at least one the second touch-control sub-electrode 09 be electrical connected with touch-control sensing electrode 07; First touch-control sub-electrode and 08 second touch-control sub-electrode 09 lay respectively at the gap location between adjacent pixel unit.Like this, on the basis of aperture opening ratio ensureing touch-screen, the touch-control area of each touch control unit can be increased, to improve the sensitivity of touch-control sensing as far as possible.
Further, when arranging each first touch-control sub-electrode 08 and the second touch-control sub-electrode 09, for each touch control unit: as shown in Figure 6, the each first touch-control sub-electrode 08 be electrical connected with touch-control sensing electrode 05 and the best one_to_one corresponding of each second touch-control 09 electrode be electrical connected with touch-control drive electrode 07, and every a pair mutual the first corresponding sub-electrode 08 and the second sub-electrode 09 form capacitance structure.Certainly, the first touch-control sub-electrode 08 in each touch control unit can not be identical with the quantity of the second touch-control sub-electrode 09, do not limit at this.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device, comprise the above-mentioned capacitance type in-cell touch panel that the embodiment of the present invention provides, the enforcement of this display device see the embodiment of above-mentioned capacitance type in-cell touch panel, can repeat part and repeats no more.
A kind of capacitance type in-cell touch panel that the embodiment of the present invention provides and display device, using the signal line in tft array substrate as touch-control drive wire, in tft array substrate adjacent column pixel cell between touch induction lines is set, and touch control unit is set at the overlapping place of touch-control sweep trace and touch induction lines, wherein, each touch control unit is by the touch-control sensing electrode be electrical connected with touch induction lines, and formed by the touch-control drive electrode that touch switch unit and touch-control sweep trace are electrical connected, realize the function of touch-screen.Owing to using signal line to input gated sweep signal as the driving sweep signal of touch-control as touch-control sweep trace to the touch-control drive electrode in touch control unit, realize touch controllable function, can avoid increasing the IC driven for touch-control, save cost of manufacture.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a capacitance type in-cell touch panel, comprises the tft array substrate with signal line, and in described tft array substrate, be provided with multiple pixel cells of the arrangement in matrix; It is characterized in that,
Described tft array substrate has the touch induction lines between the pixel cell of adjacent column;
At least one signal line in tft array substrate is as touch-control sweep trace;
Described tft array substrate has the touch control unit at the overlapping place being positioned at described touch-control sweep trace and touch induction lines; Wherein,
Each touch control unit by the touch-control sensing electrode be electrical connected with adjacent touch induction lines, and consists of the touch-control drive electrode that touch switch unit and adjacent touch-control sweep trace are electrical connected; Described touch switch unit is used for when the touch-control sweep trace be electrical connected with described touch switch unit loads gated sweep signal, the touch-control drive electrode that conducting is connected with described touch switch unit and touch-control sweep trace.
2. touch-screen as claimed in claim 1, it is characterized in that, described touch switch unit is TFT device, and wherein, grid and the drain electrode of described TFT device are electrical connected with touch-control sweep trace simultaneously, and source electrode and touch-control drive electrode are electrical connected.
3. touch-screen as claimed in claim 1, it is characterized in that, the spacing between each described touch-control sweep trace is identical, and the spacing between each described touch induction lines is identical.
4. touch-screen as claimed in claim 1, is characterized in that, the data signal line in each described touch induction lines and described tft array substrate is arranged and mutually insulated with layer.
5. touch-screen as claimed in claim 1, it is characterized in that, the material of described touch-control sensing electrode or described touch-control drive electrode is metal or transparent conductive oxide.
6. touch-screen as claimed in claim 5, it is characterized in that, touch-control sensing electrode and the touch-control drive electrode of each touch control unit are arranged with layer.
7. the touch-screen as described in any one of claim 1-6, it is characterized in that, also comprise: at least one the first touch-control sub-electrode be electrical connected with described touch-control sensing electrode, and at least one the second touch-control sub-electrode be electrical connected with described touch-control drive electrode;
Described first touch-control sub-electrode and described second touch-control sub-electrode lay respectively at the gap location between adjacent pixel unit.
8. touch-screen as claimed in claim 7, it is characterized in that, for each touch control unit: each first touch-control sub-electrode be electrical connected with touch-control sensing electrode and each second touch-control sub-electrode one_to_one corresponding be electrical connected with touch-control drive electrode, and every a pair mutual the first corresponding touch-control sub-electrode and the second touch-control sub-electrode form capacitance structure.
9. the touch-screen as described in any one of claim 1-6, is characterized in that, also comprises: be arranged at above described tft array substrate and identical with described tft array substrate size color membrane substrates;
The one side of described color membrane substrates described tft array substrate dorsad has the screen layer for electric field shielding;
Described screen layer is being at least open area with described touch control unit corresponding region.
10. a display device, is characterized in that, comprises the capacitance type in-cell touch panel as described in any one of claim 1-9.
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| CN201310026384.XA CN103105989B (en) | 2013-01-24 | 2013-01-24 | A kind of capacitance type in-cell touch panel and display device |
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| CN201310026384.XA CN103105989B (en) | 2013-01-24 | 2013-01-24 | A kind of capacitance type in-cell touch panel and display device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103294317B (en) | 2013-05-31 | 2016-03-30 | 京东方科技集团股份有限公司 | A kind of array base palte, contact panel and display device |
| CN103399679B (en) * | 2013-08-13 | 2016-12-28 | 深圳市华星光电技术有限公司 | Capacitive touch control unit and capacitive touch screen |
| CN103699283B (en) * | 2013-12-26 | 2018-12-18 | 合肥京东方光电科技有限公司 | Touch screen and its driving method and display device |
| CN103699284B (en) * | 2013-12-27 | 2016-09-21 | 京东方科技集团股份有限公司 | A kind of capacitance type in-cell touch panel and preparation method thereof, display device |
| CN106648250B (en) * | 2016-12-30 | 2020-04-10 | 南京中电熊猫液晶显示科技有限公司 | In-Cell touch panel and manufacturing method thereof |
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| JPH09292598A (en) * | 1996-04-26 | 1997-11-11 | Sanyo Electric Co Ltd | Liquid crystal distal device provided with input function |
| JP2012159817A (en) * | 2010-10-29 | 2012-08-23 | Samsung Mobile Display Co Ltd | Touch screen panel integrated type liquid crystal display and driving method therefor |
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| CN102841716A (en) * | 2012-08-21 | 2012-12-26 | 北京京东方光电科技有限公司 | Capacitance-type embedded touch screen and display device |
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