CN104699305A - Touch display device - Google Patents
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- CN104699305A CN104699305A CN201510136200.4A CN201510136200A CN104699305A CN 104699305 A CN104699305 A CN 104699305A CN 201510136200 A CN201510136200 A CN 201510136200A CN 104699305 A CN104699305 A CN 104699305A
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Abstract
The invention provides a touch display device. The touch display device comprises a thin film transistor substrate, a color filter substrate, a liquid crystal layer which is arranged between the thin film transistor substrate and the color filter substrate, a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the thin film transistor substrate comprises a first substrate, a scanning line, a data line and a plurality of pixel units; the color filter substrate comprises a second substrate, a shading layer which is arranged on the second substrate and towards the liquid crystal layer and a color resistant layer which is arranged on the second substrate and towards the liquid crystal layer; the plurality of touch driving electrodes are arranged on the first substrate; the plurality of touch sensing electrodes are arranged between the shading layer and the color resistance layer of the color filter substrate; the color resistance layer comprises a plurality of color resistors which are in different colors; the adjacent color resistors are overlapped partially; the plurality of touch sensing electrodes are respectively arranged at an overlapping position of the adjacent color resistors. The touch display device is high in touch sensitivity, high in yield and cannot generate light leakage.
Description
Technical field
The present invention relates to touch technology, particularly a kind of touch control display apparatus.
Background technology
Along with the raising of display device functionalities and people are to the further requirement of its function, the display device with touch controllable function is arisen at the historic moment, and day by day ripe.Traditional touch control display apparatus comprises external hanging type touch control display apparatus and integrated type touch control display apparatus, and integrated type touch control display apparatus is divided into again outer insert-type (On Cell) and interior insert-type (In Cell).Particularly, On Cell touch control display apparatus refers to and is arranged between the polaroid of display panel and colored filter substrate by touch sensing, and In Cel l touch control display apparatus refer to touch sensing is embedded into display panel dot structure among.Compared to On Cell touch control display apparatus, In Cell touch control display apparatus has panel slimming and light-weighted advantage, can reduce manufacturing cost and plate thickness.
A kind of In Cell touch control display apparatus of the prior art touch sensing is integrated into fringe field switch type (Fringe Field Switching, FFS) among display panels, wherein, the induction electrode of the touch sensing that many are parallel to each other is set at the colored filter substrate of display panels in the one side of liquid crystal layer, and is provided with the drive electrode of the touch sensing that many are parallel to each other above public electrode on the thin film transistor base plate of display panels.Drive electrode is vertical with the bearing of trend of induction electrode, forms inductance capacitance in intersection.When drive electrode provides touch-control drive singal, if the touch-screen of human contact's touch control display apparatus, the body capacitance electric field produced between human body and touch-screen will act on inductance capacitance, the capacitance of inductance capacitance is changed, now external touch circuit changes according to the capacitance because of inductance capacitance on the induction electrode detected and the change in voltage caused, and just can determine that human contact is to the contact position on touch-screen.But, when realizing touch controllable function, coupling capacitance between the sweep trace of the cabling of the drive electrode of touch sensing and the cabling of induction electrode and display panels itself and data line is larger, make the load of touch drive circuit larger, carry out easily causing delay in the process switched at the drive singal of touch sensing, induced signal and common signal, thus affect touch-control effect.
In prior art, solution to the problems described above has following two kinds: method one, adopt mixing (Hybrid) framework, be produced on above colored filter substrate by the drive electrode of touch sensing or induction electrode, to increase the drive electrode of touch sensing or the distance between induction electrode and thin film transistor base plate, and then reduce drive electrode or the coupling capacitance between induction electrode and thin film transistor base plate, but adopt this kind of method, due to the restriction of technique, when drive electrode or induction electrode are produced on above colored filter substrate, the thickness of display panels can only be thinned to 0.4mm, otherwise easily there is fragmentation, display panels yield is lower, the drive electrode of method two, touch sensing and induction electrode all adopt the metal material that sheet resistance is lower, to reduce the resistance value of drive electrode and induction electrode, and then reduce the load of touch drive circuit.In this approach, the drive electrode of touch sensing and induction electrode adopt metal to make, although reduce the resistance value of drive electrode and induction electrode, but because metal material surface luminous reflectance is more serious, the light of backlight is radiated at through liquid crystal layer and is positioned at colored filter substrate towards on the induction electrode made by metal of the touch sensing in the one side of liquid crystal layer, occur reflective, easily cause display panels to occur light leakage phenomena.
Summary of the invention
The object of the present invention is to provide a kind of touch control display apparatus, to solve the problem of the low and easy light leak of the yield of touch control display apparatus in prior art.
Embodiments of the invention provide a kind of touch control display apparatus, comprise colored filter substrate that thin film transistor base plate and this thin film transistor base plate be oppositely arranged and the liquid crystal layer between this thin film transistor base plate and this colored filter substrate, wherein, this thin film transistor base plate comprises the first substrate and is arranged at the sweep trace and many data lines be parallel to each other that this first substrate is parallel to each other towards many on the surface of liquid crystal layer, and this multi-strip scanning line and this plurality of data lines insulate crossing to define multiple pixel cell; This colored filter substrate comprises the second substrate, be arranged at this second substrate towards the light shield layer on the surface of liquid crystal layer, be arranged at this second substrate towards the color blocking layer on the surface of liquid crystal layer and be arranged at this color blocking layer towards the flatness layer on this liquid crystal layer surface, wherein, this touch control display apparatus also comprises: multiple touch-control drive electrode, for providing touch-control drive singal, the plurality of touch-control drive electrode is arranged in this first substrate; Multiple touch-control sensing electrode, for providing touch-control sensing signal, the plurality of touch-control sensing electrode is arranged between this light shield layer of this colored filter substrate and this color blocking layer.
Further, this first substrate is provided with the first electrode layer and the second electrode lay, this first electrode layer is a kind of electrode in public electrode or pixel electrode, and this second electrode is the another kind of electrode in public electrode or pixel electrode, and this public electrode and this touch-control drive electrode share.
Further, every frame period of this touch control display apparatus comprises display time interval and touch-control period, and in display time interval, the plurality of touch-control drive electrode is used for providing public voltage signal; Within the touch-control period, the plurality of touch-control drive electrode is used for providing touch-control drive singal.
Further, in this display time interval, this public voltage signal inputs to the plurality of touch-control sensing electrode.
Further, this first electrode layer is planar structure, and this second electrode lay comprises multiple strip sub-electrode be parallel to each other.
Further, this first electrode layer comprises multiple strip sub-electrode be parallel to each other, and this second electrode lay comprises multiple strip sub-electrode be parallel to each other, and the strip sub-electrode in this first electrode layer insulate crossing with the strip sub-electrode in this second electrode lay.
Further, the material of the plurality of touch-control sensing electrode is metal.
Further, this colored filter substrate is provided with the area of knockout of this flatness layer, this touch-control sensing electrode is by this area of knockout and conductive micro-balloons conducting, so that touch-control sensing signal is led this thin film transistor base plate, and then be connected to touch-control flexible PCB respectively by corresponding lead together with this touch-control drive electrode.
Preferably, in this touch control display apparatus, the liquid crystal molecule of liquid crystal layer is negative liquid crystal.
Touch-control sensing electrode arranges between light shield layer and color blocking layer by touch control display apparatus of the present invention, and adjacent color blocking is overlapping, due to the existence of color blocking and flatness layer, distance between touch-control sensing electrode and thin film transistor base plate is increased, and then the coupling capacitance reduced between touch-control sensing electrode and thin film transistor base plate, thus the load of touch drive circuit is reduced, improve touch-control sensitivity and can not be subject to the restriction of manufacture craft, yield is high; In addition, touch-control sensing electrode is arranged on the overlapping place of color blocking, and because the overlapping of adjacent color blocking blocks effect, the light effectively avoiding backlight is radiated at the surface of touch-control sensing electrode and the reflective phenomenon occurred, thus effectively avoids touch control display apparatus light leak.
Accompanying drawing explanation
The cross-sectional view of a kind of touch control display apparatus that Fig. 1 provides for one embodiment of the invention.
The part planar structural representation that Fig. 2 is the thin film transistor base plate of the touch control display apparatus shown in Fig. 1.
The planar structure schematic diagram of multiple touch-control sensing electrodes that Fig. 3 provides for one embodiment of the invention.
Fig. 4 is the part planar structural representation of the touch-control sensing electrode shown in Fig. 3.
The touch-control framework line floor map that Fig. 5 is the touch control display apparatus shown in Fig. 1.
The cross-sectional view at the corresponding conducting end place that Fig. 6 is the touch control display apparatus shown in Fig. 5.
The work schedule schematic diagram that Fig. 7 is the touch control display apparatus shown in Fig. 1.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of touch control display apparatus proposed according to the present invention, method, step, structure, feature and effect, be described in detail as follows.
Aforementioned and other technology contents, feature and effect for the present invention, can clearly present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of embodiment, when can to the present invention for the technological means reaching predetermined object and take and effect be able to more deeply and concrete understanding, however institute's accompanying drawings be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
Please also refer to Fig. 1 and Fig. 2, the part section structural representation of a kind of touch control display apparatus 100 that Fig. 1 provides for one embodiment of the invention, Fig. 2 is the part planar structural representation of the thin film transistor base plate 110 of the touch control display apparatus 100 shown in Fig. 1.As shown in Figures 1 and 2, touch control display apparatus 100 comprises thin film transistor base plate 110 colored filter substrate relative with this thin film transistor base plate 110 120 and the liquid crystal layer 130 between this thin film transistor base plate 110 and this colored filter substrate 120.Preferably, the liquid crystal molecule in this liquid crystal layer 130 is negative liquid crystal.
Thin film transistor base plate 110 comprises the first substrate 111, first insulation course 112, a plurality of data lines 113, second insulation course 114, first electrode layer 115, the 3rd insulation course 116 and the second electrode lay 117.This first insulation course 112, a plurality of data lines 113, second insulation course 114, first electrode layer 115, the 3rd insulation course 116 and the second electrode lay 117 are cascadingly set on this first substrate 111 towards on the surface of liquid crystal layer 130, this first insulation course 112 is arranged in this first substrate 111, this a plurality of data lines 113 is arranged between this first insulation course 112 and this second insulation course 114, this first electrode layer 115 is arranged between this second insulation course 114 and the 3rd insulation course 116, and this second electrode lay 117 is arranged between the 3rd insulation course 116 and liquid crystal layer 130.Electrode in this second electrode lay 117 comprises multiple strip sub-electrode be parallel to each other, in the present embodiment, this first electrode layer 115 is a planar electrode structure, in other embodiments, electrode in this first electrode layer 115 also can comprise multiple strip sub-electrode be parallel to each other, and the strip sub-electrode in the first electrode layer 115 insulate crossing with the strip sub-electrode in this second electrode lay 117.This first electrode layer 115 is transparent conductive material with this second electrode lay 117 and makes.
In the present embodiment, this first electrode layer 115 is pixel electrode, this the second electrode lay 117 is public electrode, this touch-control drive electrode 119 shares with the public electrode of this second electrode lay 117, in other embodiments, this first electrode layer 115 can be public electrode, and this second electrode lay 117 can be pixel electrode, accordingly, this touch-control drive electrode 119 shares with the public electrode of this first electrode layer 115.
In addition, thin film transistor base plate 110 of the present invention also comprises many sweep traces be parallel to each other 118 and multiple touch-control drive electrode 119.These many sweep traces be parallel to each other 118 are arranged at the surface of this first substrate 111 towards liquid crystal layer 130, between this first substrate 111 and this first insulation course 112.This multi-strip scanning line 118 insulate with this plurality of data lines 113 and intersects to define multiple pixel cell (sign).
Refer again to Fig. 1, colored filter substrate 120 comprises the second substrate 121, be arranged at this second substrate 121 towards the light shield layer 122 on the surface of liquid crystal layer 130 and color blocking layer 123, multiple touch-control sensing electrode 124 between light shield layer 122 and color blocking layer 123 and flatness layer 125.This light shield layer 122, the plurality of touch-control sensing electrode 124, this color blocking layer 123 and this flatness layer 125 are cascadingly set in this second substrate 121.
This color blocking layer 123 comprises multiple color blockings with different colours, and e.g., in the present embodiment, the plurality of color blocking is have redness, green and the first blue color blocking 1230, second color blocking 1232 and the 3rd color blocking 1234 respectively.In other embodiments, the plurality of color blocking also can be and has redness, green, blueness and the first white color blocking, the second color blocking, the 3rd color blocking and the 4th color blocking respectively.
First color blocking 1230 and the second color blocking 1232 part overlapping, the first color blocking 1230 and the 3rd color blocking 1234 part overlapping, that is, between adjacent color blocking, part is overlapping, and multiple touch-control sensing electrode 124 is separately positioned on the overlapping place between adjacent color blocking.
Please refer to Fig. 3, the planar structure schematic diagram of the plurality of touch-control sensing electrode 124 that Fig. 3 provides for one embodiment of the invention.As shown in Figure 3, the plurality of touch-control sensing electrode 124 is parallel to each other and disconnects, and each touch-control sensing electrode 124 is reticulate texture, and be made up of cancellated multiple grid, and the corresponding pixel cell of each grid, in addition, each touch-control sensing electrode 124 is parallel with data line 113.
Please also refer to Fig. 3 and Fig. 4, wherein, Fig. 4 is the part planar structural representation of the touch-control sensing electrode 124 shown in Fig. 3.As shown in Figure 4, this touch-control sensing electrode 124 comprises the Part I 1241 parallel and corresponding with sweep trace 118 and the Part II 1242 parallel and corresponding with data line 113, thus surrounds corresponding pixel cell.
In the present embodiment, touch-control sensing electrode 124 is metal, because the resistance of metal is lower, therefore adopt metal touch-control sensing electrode 124 to reduce the load of touch drive circuit, improve touch-control sensitivity, in addition, touch-control sensing electrode 124 is arranged on the overlapping place of color blocking, the overlapping light blocked from backlight of adjacent color blocking, avoids the light reflection of metal surface, and then solves the problem of touch control display apparatus 100 light leak.
Touch-control sensing electrode 124 is arranged between light shield layer 122 and color blocking layer 123 by the touch control display apparatus 100 of the present embodiment, and the overlapping place of corresponding adjacent color blocking, simultaneously due to the existence of color blocking and flatness layer, distance between touch-control sensing electrode 124 and thin film transistor base plate 110 is increased, and then the coupling capacitance reduced between touch-control sensing electrode 124 and thin film transistor base plate 110, thus the load of touch drive circuit is reduced, improve touch-control sensitivity and can not be subject to the restriction of manufacture craft, yield is high.
Please also refer to Fig. 5, Fig. 5 for shown in Fig. 1 the touch-control framework line floor map of touch control display apparatus.As shown in Figure 5, touch control display apparatus comprises multiple touch-control drive electrode 119, multiple touch-control sensing electrode 124 and flexible PCB 101.Wherein, touch-control sensing electrode 124 is arranged on colored filter substrate 120, touch-control drive electrode 119 is arranged on thin film transistor base plate 110, touch-control flexible PCB 101 is arranged on the binding district 1100 of thin film transistor base plate 110, and touch-control sensing electrode 124 is to transfer to touch-control flexible PCB 101 by induced signal, then need induced signal to be directed on thin film transistor base plate 110.Conducting end 126 due to touch-control sensing electrode 124 is arranged on the non-display area of colored filter substrate 120, this non-display area and thin film transistor base plate 110 are sealed by sealed plastic box (not shown), (not shown containing conductive micro-balloons in sealed plastic box, please refer to Fig. 6), therefore, induced signal is transferred on thin film transistor base plate 110 by conductive micro-balloons by the touch-control sensing electrode 124 on colored filter substrate 120, and then is connected to touch-control flexible PCB 101 respectively by corresponding lead 102 together with touch-control drive electrode 119.
Particularly, please also refer to Fig. 5 and Fig. 6, wherein, the cross-sectional view at Fig. 6 corresponding conducting end place that is the touch control display apparatus shown in Fig. 5.As shown in figs. 5 and 6, in the first substrate 111 of thin film transistor base plate 110, corresponding non-display area sets gradually wire 102, first insulation course 112 and cushion 105, in addition, the first insulation course 112 is also provided with the first alignment film 104.Wherein, the first insulation course 112 is provided with through hole (sign), this cushion 105 is connected by this through hole with this wire 102, and this cushion 105 can be the transparent conductive material identical with touch-control drive electrode 119; Colored filter substrate 120 also comprises and is arranged on light shield layer 122 towards the flatness layer 125 on the surface of liquid crystal layer 130 and be arranged on flatness layer 125 towards the second alignment film 127 on the surface of liquid crystal layer 130, wherein, the conducting end 126 of touch-control sensing electrode is positioned at the non-display area of colored filter substrate 120; In addition, the position 1250 that flatness layer 125 is relative with the conducting end 126 of touch-control sensing electrode hollows out, to make the conducting end 126 of touch-control sensing electrode, by conductive micro-balloons 140, induced signal be transferred to thin film transistor base plate 110, and then be connected to touch-control flexible PCB 101 respectively by corresponding lead 102 together with touch-control drive electrode 119.
Please also refer to Fig. 1 and Fig. 7, Fig. 7 is the work schedule schematic diagram of the touch control display apparatus 100 shown in Fig. 1, and in the present embodiment, the public electrode of touch-control drive electrode and thin film transistor base plate shares, in the display stage, the public electrode input common electrode signal of thin film transistor base plate, and in the touch-control stage, the public electrode of thin film transistor base plate, it is now touch-control drive electrode, for providing touch-control drive singal, wherein, the switching realizing above function is realized by IC internal circuit.Particularly, be described in detail below in conjunction with Fig. 7, as shown in Figure 7, every frame period of this touch control display apparatus 100 comprises display time interval and touch-control period, for example, if the driving frequency of this touch control display apparatus 100 is 60Hz, then every frame working hour of this touch control display apparatus 100 is 16.7ms, so the front 11.7ms time of this frame period can be used as display time interval, and then the 5.0ms time can be used as the touch-control period.In display time interval, multi-strip scanning line 118 sequentially provides sweep signal to the pixel cell of correspondence, the display data that a plurality of data lines 113 sequentially provides are to the pixel cell of correspondence, and the multiple touch-control drive electrodes 119 on thin film transistor base plate 110 are as public electrode input public voltage signal, thus realize the Presentation Function of this touch control display apparatus 100, meanwhile, within this time period, public voltage signal can be provided to the multiple touch-control sensing electrodes 124 on colored filter substrate 120.Within the touch-control period, the multiple touch-control drive electrodes 119 on thin film transistor base plate 110, for providing touch-control drive singal; Multiple touch-control sensing electrodes 124 on colored filter substrate 120 for provide because of touch produce induced signal, to realize the touch controllable function of this touch control display apparatus 100.Due in every frame working hour of touch control display apparatus 100, only within the touch-control period, multiple touch-control sensing electrodes 124 on colored filter substrate 120 just can produce induced signal, and in display time interval, multiple touch-control sensing electrodes 124 on colored filter substrate 120 are provided public voltage signal, and display time interval is far longer than the touch-control period, therefore touch-control sensing electrode 124 most times maintains common electric voltage and then serves electrostatic screening effect and other signals to the display interference of touch control display apparatus 100.
Touch-control sensing electrode 124 arranges between light shield layer 122 and color blocking layer 123 by touch control display apparatus 100 of the present invention, adjacent color blocking is overlapping, due to the existence of color blocking and flatness layer, distance between touch-control sensing electrode 124 and thin film transistor base plate 110 is increased, and then the coupling capacitance reduced between touch-control sensing electrode 124 and thin film transistor base plate 110, thus the load of touch drive circuit is reduced, improve touch-control sensitivity and can not be subject to the restriction of manufacture craft, yield is high; In addition, touch-control sensing electrode 124 is arranged on the overlapping place of adjacent color blocking, because the overlapping of adjacent color blocking blocks effect, thus the light effectively avoiding backlight is radiated at the surface of touch-control sensing electrode and the reflective phenomenon occurred, thus effectively avoids touch control display apparatus light leak.
Apply specific case in this instructions to set forth touch control display apparatus of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Claims (9)
1. a touch control display apparatus, comprises colored filter substrate that thin film transistor base plate and this thin film transistor base plate be oppositely arranged and the liquid crystal layer between this thin film transistor base plate and this colored filter substrate,
Wherein, this thin film transistor base plate comprises the first substrate and is arranged at the sweep trace and many data lines be parallel to each other that this first substrate is parallel to each other towards many on the surface of liquid crystal layer, and this multi-strip scanning line and this plurality of data lines insulate crossing to define multiple pixel cell;
This colored filter substrate comprises the second substrate, be arranged at this second substrate towards the light shield layer on the surface of liquid crystal layer, be arranged at this second substrate towards the color blocking layer on the surface of liquid crystal layer and be arranged at this color blocking layer towards the flatness layer on this liquid crystal layer surface, it is characterized in that, this touch control display apparatus also comprises:
Multiple touch-control drive electrode, for providing touch-control drive singal, the plurality of touch-control drive electrode is arranged in this first substrate;
Multiple touch-control sensing electrode, for providing touch-control sensing signal, the plurality of touch-control sensing electrode is arranged between this light shield layer of this colored filter substrate and this color blocking layer;
Wherein, this color blocking layer comprises multiple color blocking with different colours, and between adjacent color blocking, part is overlapping, and the plurality of touch-control sensing electrode is separately positioned on the overlapping place between adjacent color blocking.
2. touch control display apparatus as claimed in claim 1, it is characterized in that, this first substrate is provided with the first electrode layer and the second electrode lay further, this first electrode layer is a kind of electrode in public electrode or pixel electrode, this second electrode is the another kind of electrode in public electrode or pixel electrode, and this public electrode and this touch-control drive electrode share.
3. touch control display apparatus as claimed in claim 2, it is characterized in that, every frame period of this touch control display apparatus comprises display time interval and touch-control period, and in display time interval, the plurality of touch-control drive electrode is used for providing public voltage signal; Within the touch-control period, the plurality of touch-control drive electrode is used for providing touch-control drive singal.
4. touch control display apparatus as claimed in claim 3, it is characterized in that, in this display time interval, this public voltage signal inputs to the plurality of touch-control sensing electrode.
5. touch control display apparatus as claimed in claim 2, it is characterized in that, this first electrode layer is planar structure, and this second electrode lay comprises multiple strip sub-electrode be parallel to each other.
6. touch control display apparatus as claimed in claim 2, it is characterized in that, this first electrode layer comprises multiple strip sub-electrode be parallel to each other, this the second electrode lay comprises multiple strip sub-electrode be parallel to each other, and the strip sub-electrode in this first electrode layer insulate crossing with the strip sub-electrode in this second electrode lay.
7. touch control display apparatus as claimed in claim 1, it is characterized in that, the material of the plurality of touch-control sensing electrode is metal.
8. touch control display apparatus as claimed in claim 1, it is characterized in that, this colored filter substrate is provided with the area of knockout of this flatness layer, this touch-control sensing electrode is by this area of knockout and conductive micro-balloons conducting, so that touch-control sensing signal is led this thin film transistor base plate, and then be connected to touch-control flexible PCB respectively by corresponding lead together with this touch-control drive electrode.
9. touch control display apparatus as claimed in claim 1, it is characterized in that, the liquid crystal molecule of this liquid crystal layer is negative liquid crystal.
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| CN201510136200.4A CN104699305A (en) | 2015-03-26 | 2015-03-26 | Touch display device |
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| CN201510136200.4A CN104699305A (en) | 2015-03-26 | 2015-03-26 | Touch display device |
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| CN105183264A (en) * | 2015-10-28 | 2015-12-23 | 昆山龙腾光电有限公司 | Embedded capacitor touch display panel |
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Application publication date: 20150610 |