CN204965385U - In cell touch panel and display device - Google Patents

In cell touch panel and display device Download PDF

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Publication number
CN204965385U
CN204965385U CN201520797777.5U CN201520797777U CN204965385U CN 204965385 U CN204965385 U CN 204965385U CN 201520797777 U CN201520797777 U CN 201520797777U CN 204965385 U CN204965385 U CN 204965385U
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China
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touch
array base
base palte
pressure sensitive
electrode
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CN201520797777.5U
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Chinese (zh)
Inventor
丁小梁
董学
陈小川
王海生
刘英明
杨盛际
赵卫杰
任涛
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京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to CN201520797777.5U priority Critical patent/CN204965385U/en
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Publication of CN204965385U publication Critical patent/CN204965385U/en

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Abstract

The utility model discloses an in cell touch panel and display device, increased and set up the touch -control forced induction electrode between touch -control detection electrode place rete and array substrate's substrate base plate, touch -control forced induction electrode can form the electric capacity structure with the metal level that is located the array substrate below, touch -control forced induction electrode position when pressing and the distance between the metal level change and bring the change of electric capacity thereupon, therefore, in the touch time section, the chip is listened to the touch -control can judge the touch -control position through the capacitance value change that detects each touch -control detection electrode, and judge the size of touch -control position pressure through the capacitance value change that detects touch -control forced induction electrode. Integrate touch -control forced induction electrode inside the touch -sensitive screen, it is less to display device's structural design change in the function of carrying out having realized forced induction when the touch -control is surveyed, can not receive the restriction of assembly tolerance, be favorable to realizing better detection precision, and saved the cost of manufacture.

Description

A kind of In-cell touch panel and display device

Technical field

The utility model relates to technical field of touch control, particularly relates to a kind of In-cell touch panel and display device.

Background technology

The fields such as pressure sensitive technology refers to the technology can implementing detection to external force, and this technology is just used in industry control for a long time, medical treatment.At present, the mode realizing pressure sensitive in display field especially mobile phone or dull and stereotyped field increases extra mechanism to realize in the backlight portion of display panels or the midframe part of mobile phone, this design needs to make change to the structural design of display panels or mobile phone, and due to build-up tolerance comparatively large, the detection accuracy of this design is also restricted.

Therefore, how to realize the higher pressure sensitive of detection accuracy when display panel hardware modifications is less, be the problem that solution is needed in skilled person territory badly.

Utility model content

In view of this, the utility model embodiment provides a kind of In-cell touch panel and display device, in order to realize the detection of high-precision pressure induction in touch-screen.

Therefore, a kind of In-cell touch panel that the utility model embodiment provides, comprise the array base palte put and subtend substrate relatively, and be arranged at described array base palte towards described subtend substrate side and/or described subtend real estate to the touch detection electrodes of described array base palte side, also comprise:

Be arranged at the touch-control pressure sensitive electrode between described touch detection electrodes place rete and the underlay substrate of described array base palte, described touch-control pressure sensitive electrode and the metal level be positioned at below described array base palte form capacitance structure;

In the touch-control time period, touch control detection signal is loaded to described touch detection electrodes and touch-control pressure sensitive electrode simultaneously, by detecting the capacitance variation of each described touch detection electrodes to judge position of touch, and by detecting the capacitance variation of described touch-control pressure sensitive electrode to judge the touch detection chip of position of touch pressure size.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, also comprise: be arranged at the side of described subtend real estate to described array base palte, or be arranged at the black matrix layer of described array base palte towards the side of described subtend substrate;

The orthogonal projection of figure on described array base palte of each described touch-control pressure sensitive electrode is positioned at the figure region of described black matrix layer.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, the figure of each described touch-control pressure sensitive electrode is the fenestral fabric that orthogonal projection on described array base palte is positioned at the figure region of described black matrix layer.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, described array base palte has top gate type thin film transistor, is provided with the barrier electrode of the active layer pattern for blocking described top gate type thin film transistor between described top gate type thin film transistor place rete and the underlay substrate of described array base palte;

Each described touch-control pressure sensitive electrode and described barrier electrode are arranged with layer.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, the described barrier electrode that the fenestral fabric that described touch-control pressure sensitive electrode and this touch-control pressure sensitive electrode have surrounds is electrical connected.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, along the direction in the points toward edge region, central area of described array base palte, each described touch-control pressure sensitive electrode region area occupied on described array base palte becomes large gradually; And/or,

Along the direction in the points toward edge region, central area of described array base palte, in unit area, the number of described touch-control pressure sensitive electrode diminishes gradually.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, described touch detection electrodes is that multiple same layer is arranged and separate self-capacitance electrode; Or,

Described touch detection electrodes is touch-control drive electrode arranged in a crossed manner and touch-control sensing electrode.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, each described self-capacitance electrode forms the common electrode layer on described array base palte.

In a kind of possible implementation, in the above-mentioned In-cell touch panel that the utility model embodiment provides, in the touch-control time period, the grid line in described array base palte loads the electric signal identical with described touch control detection signal with data line.

A kind of display device that the utility model embodiment provides, comprises the above-mentioned In-cell touch panel that the utility model embodiment provides, and the metal level below the array base palte being arranged on In-cell touch panel.

In a kind of possible implementation, in the above-mentioned display device that the utility model embodiment provides, described metal level is the center of mobile phone or the backlight metal at the backlight module back side.

The beneficial effect of the utility model embodiment comprises:

A kind of In-cell touch panel that the utility model embodiment provides and display device, the touch-control pressure sensitive electrode be arranged between touch detection electrodes place rete and the underlay substrate of array base palte is added in the structure of In-cell touch panel, the touch-control pressure sensitive electrode increased can form capacitance structure with the metal level be positioned at below array base palte, when touch-control pressure sensitive electrode position is pressed, the distance between touch-control pressure sensitive electrode and metal level changes and brings the change of electric capacity between the two thereupon.Therefore, in the touch-control time period, touch detection chip can load touch control detection signal to touch detection electrodes and touch-control pressure sensitive electrode simultaneously, position of touch can be judged by the capacitance variation detecting each touch detection electrodes, achieve touch detection function, and position of touch pressure size can be judged by the capacitance variation detecting touch-control pressure sensitive electrode, achieve pressure sensitive function.Touch-control pressure sensitive electrode is integrated in touch-screen inside by the above-mentioned In-cell touch panel that the utility model embodiment provides, the function of pressure sensitive is achieved while carrying out touch-control detection, structural design change for display device is less, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.

Accompanying drawing explanation

The structural representation of the In-cell touch panel that Fig. 1 provides for the utility model embodiment;

Fig. 2 a and Fig. 2 b is respectively the schematic top plan view of touch-control pressure sensitive distribution of electrodes in the In-cell touch panel that the utility model embodiment provides;

The structural representation of array base palte in the In-cell touch panel that Fig. 3 provides for the utility model embodiment;

The schematic diagram of a touch-control pressure sensitive electrode in the In-cell touch panel that Fig. 4 provides for the utility model embodiment;

The driver' s timing schematic diagram of the In-cell touch panel that Fig. 5 provides for the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing, the In-cell touch panel provide the utility model embodiment and the embodiment of display device are described in detail.

In accompanying drawing, the thickness of each rete and shape do not reflect actual proportions, and object just signal illustrates the utility model content.

A kind of In-cell touch panel that the utility model embodiment provides, as shown in Figure 1, comprise the array base palte 100 put and subtend substrate 200 relatively, and be arranged at array base palte 100 towards subtend substrate 200 side and/or subtend substrate 200 towards the touch detection electrodes 300 of array base palte 100 side, be arranged on array base palte 100 for touch detection electrodes 300 in Fig. 1 and be described, also comprise:

Be arranged at the touch-control pressure sensitive electrode 400 between touch detection electrodes 300 place rete and the underlay substrate 101 of array base palte 100, touch-control pressure sensitive electrode 400 can form capacitance structure with the metal level 500 be positioned at below array base palte 100;

In the touch-control time period, touch control detection signal is loaded to touch detection electrodes 300 and touch-control pressure sensitive electrode 400 simultaneously, by detecting the capacitance variation of each touch detection electrodes 300 to judge position of touch, and by the capacitance variation that detects touch-control pressure sensitive electrode 400 to judge the touch detection chip 600 of position of touch pressure size.

The above-mentioned In-cell touch panel that the utility model embodiment provides, the touch-control pressure sensitive electrode 400 be arranged between touch detection electrodes 300 place rete and the underlay substrate 101 of array base palte 100 is added in the structure of In-cell touch panel, the touch-control pressure sensitive electrode 400 increased can form capacitance structure with the metal level 500 be positioned at below array base palte 100, when touch-control pressure sensitive electrode 400 position is pressed, distance between touch-control pressure sensitive electrode 400 and metal level 500 changes and brings the change of electric capacity between the two thereupon, therefore, in the touch-control time period, touch detection chip 600 can load touch control detection signal to touch detection electrodes 300 and touch-control pressure sensitive electrode 400 simultaneously, position of touch can be judged by the capacitance variation detecting each touch detection electrodes 300, achieve touch detection function, and position of touch pressure size can be judged by the capacitance variation detecting touch-control pressure sensitive electrode 400, achieve pressure sensitive function.Touch-control pressure sensitive electrode 400 is integrated in touch-screen inside by the above-mentioned In-cell touch panel that the utility model embodiment provides, the function of pressure sensitive is achieved while carrying out touch-control detection, structural design change for display device is less, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.

In the specific implementation, the touch-control pressure sensitive electrode 400 increased in the above-mentioned In-cell touch panel that the utility model embodiment provides generally adopts metal material to make, in order to the aperture opening ratio making the touch-control pressure sensitive electrode 400 of increase not affect viewing area, the figure of each touch-control pressure sensitive electrode 400 generally can by the graph shealtering of black matrix layer 201, and namely the orthogonal projection of figure on array base palte of each touch-control pressure sensitive electrode 400 is positioned at the figure region of black matrix layer 201.As shown in Figure 1, this black matrix layer 201 specifically can be arranged on the side of subtend substrate 200 towards array base palte 100, also can put in the side of array base palte 100 towards subtend substrate 200, be not specifically limited at this.

And, in the specific implementation, as shown in Figure 2 a, the figure orthogonal projection be traditionally arranged to be on array base palte 100 of each touch-control pressure sensitive electrode 400 is positioned at the fenestral fabric of the figure region of black matrix layer 201, and this fenestral fabric is specifically made up of the horizontal list structure identical with grid line bearing of trend and the longitudinal strip structure identical with data line bearing of trend.The figure of certain each touch-control pressure sensitive electrode 400 also can only be arranged to horizontal list structure, can also only be arranged to longitudinal strip structure, according to designing by actual parameter, not limit at this.

Particularly, in the above-mentioned In-cell touch panel that the utility model embodiment provides, according to the precision of the touch-control pressure of concrete required detection, size and the gap of each touch-control pressure sensitive electrode 400 can be specifically set.And, because In-cell touch panel is generally utilize frame region to be fixed on the housing of display device, therefore, when adopting identical dynamics to press central area and the fringe region of In-cell touch panel, the easier distance be converted to by pressure between the metal level 500 of below of touch-control pressure sensitive electrode 400 of central area changes, namely central area is more responsive for pressure, therefore, when specific design, in order to make the pressure sensitive sensitivity of the whole panel of touch-screen relatively uniform, as shown in Figure 2 b, can along the direction in the points toward edge region, central area of array base palte 100, each touch-control pressure sensitive electrode 400 region area occupied on array base palte 100 is become large gradually, or along the direction in the points toward edge region, central area of array base palte 100, in unit area, the number of touch-control pressure sensitive electrode 400 diminishes gradually, or, along the direction in the points toward edge region, central area of array base palte 100, each touch-control sensing pressure electrode 400 region area occupied on array base palte 100 is become large gradually, and meanwhile, in unit area, the number of touch-control pressure sensitive electrode 400 diminishes gradually.

At present, thin film transistor (TFT) in the array base palte 100 used in display panel generally adopts amorphous silicon to be manufactured with active layer, the defect own due to amorphous silicon existence itself can cause the problems such as the ON state current of thin film transistor (TFT) is low, mobility is low, poor stability, it is made to be restricted in a lot of field, in order to make up the defect of amorphous silicon own, low temperature polycrystalline silicon (LowTemperaturePoly-Silicon, LTPS) is adopted to arise at the historic moment as the thin-film transistor array base-plate of active layer.Current low-temperature polysilicon film transistor array base palte mostly is top gate type thin film transistor structure, as shown in Figure 3, mainly comprises: the retes such as the active layer 011 set gradually on underlay substrate 101, grid 012, source-drain electrode 013; And, the position of source-drain electrode 013 and grid 012 can exchange, namely first can form grid 012 and then form source-drain electrode 013, also first can form source-drain electrode 013 and then form grid 012, not limiting at this, is all then form source-drain electrode 013 for the first formation grid 012 shown in Fig. 3 to be described below.Wherein, the light in order to avoid backlight is irradiated to active layer 011 and produces photo-generated carrier thus affect the performance of thin film transistor (TFT), in array base palte, is also provided with avoids light to be irradiated to barrier electrode 014 on active layer 011 in the below of active layer 011.Namely, when array base palte 100 has top gate type thin film transistor, between top gate type thin film transistor place rete and the underlay substrate 101 of array base palte, the barrier electrode 014 of active layer 011 pattern for blocking top gate type thin film transistor is provided with.

Usually, as shown in Figure 3, this barrier electrode 014 is consistent with the figure of active layer 011.Therefore, the above-mentioned In-cell touch panel that the utility model embodiment provides in the specific implementation, as shown in Figure 3, can make at barrier electrode 014 place rete the touch-control pressure sensitive electrode 400 increased, arrange with layer with barrier electrode 014 by each touch-control pressure sensitive electrode 400.Like this, on the basis of existing array base palte preparation technology, do not need to increase extra technique, can production cost be saved, enhance productivity.

Further, in the above-mentioned In-cell touch panel that the utility model embodiment provides, in order to increase the induction area of each touch-control pressure sensitive electrode 400, as shown in Figure 4, the barrier electrode 014 fenestral fabric that touch-control pressure sensitive electrode 400 and this touch-control pressure sensitive electrode 400 have can surrounded is electrical connected.

Particularly, on the top gate type thin film transistor of array base palte, as shown in Figure 3, generally also comprise: common electrode layer 015 and pixel electrode 016; Wherein, the position of common electrode layer 015 and pixel electrode 016 can exchange, namely common electrode layer 015 can be positioned at lower floor's (closer to underlay substrate) as plate electrode, and pixel electrode 016 is positioned at upper strata (closer to liquid crystal layer) as gap electrode; Also can be positioned at lower floor's (closer to underlay substrate) as plate electrode by pixel electrode 016, common electrode layer 015 is positioned at upper strata (closer to liquid crystal layer) as gap electrode.Certainly, common electrode layer 015 can also be arranged on relative with array base palte 100 and on the subtend substrate 200 put, namely common electrode layer 015 be set on array base palte 100.All be arranged on below pixel electrode 016 for the common electrode layer 015 shown in Fig. 3 to be described below.

In the specific implementation, in the In-cell touch panel that the utility model embodiment provides, concrete structure for the touch detection electrodes of touch detection can have multiple implementation, and such as, touch detection electrodes can be arranged by multiple same layer and separate self-capacitance electrode forms; Touch detection electrodes also can be made up of touch-control drive electrode arranged in a crossed manner and touch-control sensing electrode.

Wherein, when adopting self-capacitance electrode to realize touch detection function, the multiplexing self-capacitance electrode of the common electrode layer 015 in array base palte 100 can be adopted, namely the common electrode layer 015 on respective capacitance electrode composition array base palte 100, as shown in Figure 3, when carrying out change and being divided into self-capacitance electrode by the structure of common electrode layer 015, on the basis of existing array base palte preparation technology, do not need to increase extra technique, can production cost be saved, enhance productivity.

Particularly, in the above-mentioned In-cell touch panel that the utility model embodiment provides, in order to reduce the mutual interference between display and touching signals, in the specific implementation, need the mode adopting touch-control and display stage timesharing to drive, further, display driver chip and touch detection chip can also be integrated into a chip in the specific implementation, reduce production cost further.

Particularly, such as: in driver' s timing figure as shown in Figure 5, time touch-screen being shown each frame (V-sync) is divided into displaying time section (Display) and touch-control time period (Touch).At displaying time section (Display), successively scanning gate signal is applied to the every bar signal line Gate in touch-screen, grayscale signal is applied to data signal line Sourse; When the multiplexing self-capacitance electrode of employing common electrode layer, the touch detection chip be connected with respective capacitance electrode Cm applies common electrode signal, to realize crystal display respectively to respective capacitance electrode Cm.At touch-control time period (Touch), as shown in Figure 5, the touch detection chip be connected with respective capacitance electrode Cm applies touch control detection signal to respective capacitance electrode Cm and each touch-control pressure sensitive electrode Ls simultaneously, receive the feedback signal of respective capacitance electrode Cm and each touch-control pressure sensitive electrode Ls simultaneously, by judging whether the size that touch-control and induction pressure occur to the analysis of feedback signal, to realize the function of touch-control and induction pressure simultaneously.

Further, as shown in Figure 5, in order to avoid the grid line in touch-control time period (Touch) array base palte with produce ground capacitance between data line and touch-control pressure sensitive electrode thus affect the accuracy of pressure sensitive, in the specific implementation, in the touch-control time period, the electric signal identical with described touch control detection signal can be loaded by grid line in array substrate with data line, grid line and the ground capacitance between data line and touch-control pressure sensitive electrode can be eliminated like this, be convenient to the accuracy improving pressure sensitive.

It should be noted that, the above-mentioned touch-screen that the utility model embodiment provides specifically can be applied to display panels (LiquidCrystalDisplay, LCD), or, also organic EL display panel (OrganicElectroluminesecentDisplay, OLED) can be applied to, or, other display panels can also be applied to, not limit at this.

Conceive based on same utility model, the utility model embodiment still provides a kind of display device, comprises the above-mentioned In-cell touch panel that the utility model embodiment provides, and the metal level below the array base palte being arranged on In-cell touch panel.This display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The enforcement of this display device see the embodiment of above-mentioned In-cell touch panel, can repeat part and repeats no more.

Particularly, when the above-mentioned display device that the utility model embodiment provides is mobile phone, the metal level be arranged on below touch-screen can be the center of mobile phone, when the touch-screen employing display panels of the above-mentioned display device that the utility model embodiment provides, the metal level be arranged on below touch-screen can be the backlight metal at the backlight module back side.Further, this backlight metal can be specially the metal frame be coated on outside backlight module, also can be specially the metal patch being covered on the backlight module back side, not limit at this.

The above-mentioned In-cell touch panel that the utility model embodiment provides and display device, the touch-control pressure sensitive electrode be arranged between touch detection electrodes place rete and the underlay substrate of array base palte is added in the structure of In-cell touch panel, the touch-control pressure sensitive electrode increased can form capacitance structure with the metal level be positioned at below array base palte, when touch-control pressure sensitive electrode position is pressed, the distance between touch-control pressure sensitive electrode and metal level changes and brings the change of electric capacity between the two thereupon.Therefore, in the touch-control time period, touch detection chip can load touch control detection signal to touch detection electrodes and touch-control pressure sensitive electrode simultaneously, position of touch can be judged by the capacitance variation detecting each touch detection electrodes, achieve touch detection function, and position of touch pressure size can be judged by the capacitance variation detecting touch-control pressure sensitive electrode, achieve pressure sensitive function.Touch-control pressure sensitive electrode is integrated in touch-screen inside by the above-mentioned In-cell touch panel that the utility model embodiment provides, the function of pressure sensitive is achieved while carrying out touch-control detection, structural design change for display device is less, the restriction of build-up tolerance can not be subject to, be conducive to realizing better detection accuracy, and be conducive to saving cost of manufacture.

Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.

Claims (11)

1. an In-cell touch panel, comprise the array base palte put and subtend substrate relatively, and be arranged at described array base palte towards described subtend substrate side and/or described subtend real estate to the touch detection electrodes of described array base palte side, it is characterized in that, also comprise:
Be arranged at the touch-control pressure sensitive electrode between described touch detection electrodes place rete and the underlay substrate of described array base palte, described touch-control pressure sensitive electrode and the metal level be positioned at below described array base palte form capacitance structure;
In the touch-control time period, touch control detection signal is loaded to described touch detection electrodes and touch-control pressure sensitive electrode simultaneously, by detecting the capacitance variation of each described touch detection electrodes to judge position of touch, and by detecting the capacitance variation of described touch-control pressure sensitive electrode to judge the touch detection chip of position of touch pressure size.
2. In-cell touch panel as claimed in claim 1, is characterized in that, also comprise: be arranged at the side of described subtend real estate to described array base palte, or be arranged at the black matrix layer of described array base palte towards the side of described subtend substrate;
The orthogonal projection of figure on described array base palte of each described touch-control pressure sensitive electrode is positioned at the figure region of described black matrix layer.
3. In-cell touch panel as claimed in claim 2, is characterized in that, the figure of each described touch-control pressure sensitive electrode is the fenestral fabric that orthogonal projection on described array base palte is positioned at the figure region of described black matrix layer.
4. In-cell touch panel as claimed in claim 3, it is characterized in that, described array base palte has top gate type thin film transistor, is provided with the barrier electrode of the active layer pattern for blocking described top gate type thin film transistor between described top gate type thin film transistor place rete and the underlay substrate of described array base palte;
Each described touch-control pressure sensitive electrode and described barrier electrode are arranged with layer.
5. In-cell touch panel as claimed in claim 4, it is characterized in that, the described barrier electrode that the fenestral fabric that described touch-control pressure sensitive electrode and this touch-control pressure sensitive electrode have surrounds is electrical connected.
6. the In-cell touch panel as described in any one of claim 1-5, it is characterized in that, along the direction in the points toward edge region, central area of described array base palte, each described touch-control pressure sensitive electrode region area occupied on described array base palte becomes large gradually; And/or,
Along the direction in the points toward edge region, central area of described array base palte, in unit area, the number of described touch-control pressure sensitive electrode diminishes gradually.
7. the In-cell touch panel as described in any one of claim 1-5, is characterized in that, described touch detection electrodes is that multiple same layer is arranged and separate self-capacitance electrode; Or,
Described touch detection electrodes is touch-control drive electrode arranged in a crossed manner and touch-control sensing electrode.
8. In-cell touch panel as claimed in claim 7, it is characterized in that, each described self-capacitance electrode forms the common electrode layer on described array base palte.
9. the In-cell touch panel as described in any one of claim 1-5, is characterized in that, in the touch-control time period, the grid line in described array base palte loads the electric signal identical with described touch control detection signal with data line.
10. a display device, is characterized in that, comprises the In-cell touch panel as described in any one of claim 1-9, and the metal level below the array base palte being arranged on In-cell touch panel.
11. display device as claimed in claim 10, is characterized in that, described metal level is the center of mobile phone or the backlight metal at the backlight module back side.
CN201520797777.5U 2015-10-15 2015-10-15 In cell touch panel and display device CN204965385U (en)

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