Embodiment
A kind of touch display screen and display device that the embodiment of the present invention provides, form parallel-connection structure by the some or all of auxiliary conductive layer being electrically connected with it at least one signal transmssion line in touch display screen, thereby reduce the resistance of this signal transmssion line, reduce the distortion degree of the signal of this signal transmssion line transmission, improved the accuracy of the equipment that uses touch display screen in the time determining touch location according to the signal of this signal transmssion line transmission.
Below in conjunction with Figure of description, a kind of touch display screen that the embodiment of the present invention is provided and the embodiment of display device describe.
A kind of touch display screen that the embodiment of the present invention provides, as shown in Fig. 1 a and Fig. 1 b, comprise display screen 11, on display screen 11, be provided with multiple drive electrodes 12 and multiple induction electrode 13, many barss transmission line 14, be connected with each drive electrode 12 or each induction electrode 13 respectively, every bars transmission line 14 connects a drive electrode 12 or connects an induction electrode 13, wherein, at least one signal transmssion line 14 is electrically connected with auxiliary conductive layer 15, and the auxiliary conductive layer 15 that at least one signal transmssion line 14 is electrically connected with it forms parallel-connection structure.
In Fig. 1 a and Fig. 1 b, between signal transmssion line 14 and its auxiliary conductive layer 15 being electrically connected, there is insulation course, auxiliary conductive layer 15 can be electrically connected with signal transmssion line 14 by via hole, the position of via hole is the tie point 16 that auxiliary conductive layer 15 and signal transmssion line 14 are electrically connected, certainly, while having insulation course between auxiliary conductive layer 15 and signal transmssion line 14, auxiliary conductive layer 15 also can be electrically connected with signal transmssion line 14 by other means.
In Fig. 1 a and Fig. 1 b, there are two bars transmission lines 14 to be electrically connected with auxiliary conductive layer 15, in tie point between the connected auxiliary conductive layer 15 of each bars transmission line 14 in this two barss transmission line 14, there is the position of two tie points 16 not overlapping, thereby form signal transmssion line 14 structure in parallel with auxiliary conductive layer 15, can reduce the resistance of this two barss transmission line 14, therefore, can reduce the distortion degree of the signal that this two barss transmission line 14 transmits, improve the accuracy of the equipment that uses touch display screen when the signal transmitting according to this two barss transmission line 14 is determined touch location.
Fig. 1 a is with the difference of Fig. 1 b: in Fig. 1 a, drive electrode 12 is connected with signal transmssion line 14, and in Fig. 1 b, the signal transmssion line 14 being connected with drive electrode 12 directly substitutes drive electrode 12, therefore, in Fig. 1 b, does not occur drive electrode 12.
Drive electrode 12, induction electrode 13 and signal transmssion line 14 in Fig. 1 a and Fig. 1 b is arranged in the same layer of touch display screen.Certainly, drive electrode, induction electrode and signal transmssion line also can be arranged in the different layers of touch display screen.
Due to, in the time of different layers in touch display screen of drive electrode and induction electrode, it is wider that the signal transmssion line that the signal transmssion line that drive electrode can be connected is connected with induction electrode arranges, the signal transmssion line that the signal transmssion line that also drive electrode can be connected or induction electrode connect is arranged on non-display area, adopt light tight or affect transmittance low resistance material make, therefore, in the time of different layers in touch display screen of drive electrode and induction electrode, the resistance of signal transmssion line is less.Only at drive electrode and induction electrode when the same layer in touch display screen, because the area of viewing area is limited, therefore, it is narrow that signal transmssion line all arranges, and this will cause the resistance of signal transmssion line larger.Therefore,, when same layer at drive electrode and induction electrode in touch display screen, the accuracy when touch display screen that the embodiment of the present invention provides is determined touch location improves larger.
Preferably, in order not affect the display effect of touch display screen, drive electrode, induction electrode and the signal transmssion line in the touch display screen that the embodiment of the present invention provides is the printing opacity conductive material made from layer.
Signal transmssion line in the touch display screen that the embodiment of the present invention provides can also directly cover auxiliary conductive layer, or directly covered by auxiliary conductive layer, now, signal transmssion line directly contacts with the auxiliary conductive layer of its electrical connection, between the two, there is not insulation course or other dielectric layers, so also can reduce the resistance (because the resistance on signal transmssion line is greater than the resistance of drive electrode or the resistance of induction electrode) on signal transmssion line, thus accuracy when raising touch display screen is determined touch location.
When the signal transmssion line in the touch display screen that the embodiment of the present invention provides directly covers auxiliary conductive layer, or while directly covering by auxiliary conductive layer, the area in the region of the orthogonal projection of the auxiliary conductive layer being electrically connected with a bars transmission line on display screen, is not more than the area in the region of this orthogonal projection of bars transmission line on display screen.That is to say, a bars transmission line can be covered by auxiliary conductive layer completely, and the part that also can cover in signal transmssion line is covered by auxiliary conductive layer.
The area in the region of the orthogonal projection of the each bars transmission line in the touch display screen only providing with the embodiment of the present invention below on display screen, the situation that equals the area in the region of the signal transmssion line that is electrically connected with this bars transmission line orthogonal projection on display screen is that example describes.
As shown in Fig. 2 a, Fig. 2 b, Fig. 2 c and Fig. 2 d, every bars transmission line 14 in the touch display screen that the embodiment of the present invention provides directly covers auxiliary conductive layer 15, or as shown in Fig. 2 e and Fig. 2 f, every bars transmission line 14 is directly covered by auxiliary conductive layer 15.In Fig. 2 a-Fig. 2 f, signal transmssion line 14 directly contacts with the auxiliary conductive layer 15 of its electrical connection, does not have insulation course or other dielectric layers between the two.
Wherein, in Fig. 2 a, Fig. 2 b, Fig. 2 c and Fig. 2 d, auxiliary conductive layer 15 is positioned under signal transmssion line 14, in the time that in auxiliary conductive layer 15, only 14 lines covering is transmitted by signal in the surface of display screen 11 dorsad, Fig. 2 b is the sectional view that Fig. 2 a locates at AA ', in the time all being transmitted 14 lines covering by signal except the surface towards the surface of display screen 11 in auxiliary conductive layer 15, Fig. 2 d is the sectional view that Fig. 2 c locates at BB '; In the time that the auxiliary conductive layer 15 in touch display screen is the structure of Fig. 2 d with signal transmssion line 14, if the material of auxiliary conductive layer 15 for being easily corroded, as metal, this structure can avoid auxiliary conductive layer to be corroded in the subsequent technique of making touch display screen.In Fig. 2 e and Fig. 2 f, auxiliary conductive layer 15 is positioned on signal transmssion line 14, and Fig. 2 f is the sectional view that Fig. 2 e locates at CC '.
When the every bars transmission line in the touch display screen that the embodiment of the present invention provides directly covers auxiliary conductive layer, or, when every bars transmission line is directly covered by auxiliary conductive layer, any one point in every bars transmission line is the tie point being electrically connected with auxiliary conductive layer.
Preferably, accuracy while determining touch location in order further to improve touch display screen, can also reduce the resistance of drive electrode or the resistance of induction electrode, now, as shown in Figure 3 a, the surface of at least one drive electrode (being used as the signal transmssion line 14 of drive electrode) in the touch display screen that the embodiment of the present invention provides is directly covered by auxiliary conductive layer 15, or, the surface of at least one induction electrode 13 in the touch display screen that as shown in Figure 3 b, the embodiment of the present invention provides is directly covered by auxiliary conductive layer 15.
At Fig. 3 a, there is a drive electrode, a surface as the signal transmssion line 14 of drive electrode is directly covered by auxiliary conductive layer 15; In Fig. 3 b, there is the surface of two induction electrodes 13 directly to be covered by auxiliary conductive layer 15.
Certainly, the touch display screen that the embodiment of the present invention provides also can adopt at least one drive electrode wherein directly to cover auxiliary conductive layer (auxiliary conductive layer is under drive electrode), or at least one induction electrode wherein directly covers auxiliary conductive layer (auxiliary conductive layer is under induction electrode); The touch display screen that the embodiment of the present invention provides can also adopt at least one drive electrode wherein directly to be covered by auxiliary conductive layer, and cover auxiliary conductive layer and (under drive electrode, have auxiliary conductive layer, on drive electrode, also there is auxiliary conductive layer), or at least one induction electrode wherein is directly covered by auxiliary conductive layer, and cover auxiliary conductive layer (have auxiliary conductive layer under induction electrode, also have auxiliary conductive layer on induction electrode).
Due to, the surface coverage of drive electrode (or induction electrode) has auxiliary conductive layer, and auxiliary conductive layer adopts the conductive material of resistivity lower than drive electrode (or induction electrode) resistivity, therefore, the resistance of drive electrode (or induction electrode) has reduced, therefore, reduce the distortion degree of the signal of drive electrode (or induction electrode) transmission, improved the accuracy of the equipment that uses touch display screen in the time determining touch location according to the signal of drive electrode (or induction electrode) transmission.
Preferably, as shown in Figure 4, the each drive electrode (being used as the signal transmssion line 14 of drive electrode) in the touch display screen that the embodiment of the present invention provides is directly covered by auxiliary conductive layer 15, and each induction electrode 13 is directly covered by auxiliary conductive layer 15.
Certainly, the touch display screen that the embodiment of the present invention provides also can adopt each drive electrode wherein directly to cover auxiliary conductive layer (auxiliary conductive layer is under drive electrode), and each induction electrode wherein directly covers auxiliary conductive layer (auxiliary conductive layer is under induction electrode); The touch display screen that the embodiment of the present invention provides can also adopt each drive electrode wherein directly to be covered by auxiliary conductive layer, and cover auxiliary conductive layer and (under drive electrode, have auxiliary conductive layer, on drive electrode, also there is auxiliary conductive layer), or each induction electrode wherein is directly covered by auxiliary conductive layer, and cover auxiliary conductive layer (have auxiliary conductive layer under induction electrode, also have auxiliary conductive layer on induction electrode).
Due to, there is auxiliary conductive layer on the surface of each drive electrode (or each induction electrode), and auxiliary conductive layer adopts the conductive material of resistivity lower than drive electrode (or induction electrode) resistivity, therefore, the resistance of each drive electrode (or each induction electrode) has reduced, therefore, reduce the distortion degree of the signal of each drive electrode (or each induction electrode) transmission, improved the accuracy of the equipment that uses touch display screen in the time determining touch location according to the signal of each drive electrode (or each induction electrode) transmission.
In the time that above-mentioned auxiliary conductive layer is printing opacity conductive material, as shown in Figure 5, the figure of auxiliary conductive layer 15 that covers drive electrode (as the signal transmssion line 14 of drive electrode) in the touch display screen that the embodiment of the present invention provides is identical with the figure of drive electrode (being used as the signal transmssion line 14 of drive electrode), the figure of the auxiliary conductive layer 15 of covering induction electrode 13 is identical with the figure of induction electrode 13, the auxiliary conductive layer 15 that covers signal transmssion line 14 is identical with the figure of signal transmssion line 14, and such auxiliary conductive layer can not affect the display effect of touch display screen.
Preferably, as shown in Figure 6 and Figure 7, no matter auxiliary conductive layer is printing opacity conductive material or light tight conductive material, the projection of auxiliary conductive layer 15 in the touch display screen that the embodiment of the present invention provides on display screen 11 drops on the black matrix 16 in this display screen, in this display screen 11, the drive electrode signal transmssion line 14 of drive electrode (for), induction electrode 13 and signal transmssion line 14 are same layer printing opacity conductive material.Wherein, Fig. 7 prolongs the sectional view that DD ' locates in Fig. 6.
Now, if auxiliary conductive layer is lighttight conductive material, because the width dimensions of lighttight auxiliary conductive layer is not more than the width dimensions of black matrix in display screen, be that the black matrix that lighttight auxiliary conductive layer is shown in screen completely blocks, can avoid like this aperture opening ratio that reduces the pixel in touch display screen that arranges of light tight auxiliary conductive layer.If the conductive material that auxiliary conductive layer is printing opacity, because the width dimensions of the auxiliary conductive layer of printing opacity is not more than the width dimensions of black matrix in display screen, be that black matrix in the completely shown screen of auxiliary conductive layer of printing opacity blocks, can avoid like this arranging of printing opacity auxiliary conductive layer to reduce the penetrance of the picture that touch display screen shows.
Certainly, the touch display screen that the embodiment of the present invention provides also can adopt at least one drive electrode wherein directly to cover auxiliary conductive layer (auxiliary conductive layer is under drive electrode), or at least one induction electrode wherein directly covers auxiliary conductive layer (auxiliary conductive layer is under induction electrode); The touch display screen that the embodiment of the present invention provides can also adopt at least one drive electrode wherein directly to be covered by auxiliary conductive layer, and cover auxiliary conductive layer and (under drive electrode, have auxiliary conductive layer, on drive electrode, also there is auxiliary conductive layer), or at least one induction electrode wherein is directly covered by auxiliary conductive layer, and cover auxiliary conductive layer (have auxiliary conductive layer under induction electrode, also have auxiliary conductive layer on induction electrode).
Due to, the surface coverage of drive electrode (or induction electrode) has auxiliary conductive layer, and auxiliary conductive layer can adopt the conductive material of resistivity lower than drive electrode (or induction electrode) resistivity, resistance by parallel way drive electrode (or induction electrode) has reduced, therefore, reduce the distortion degree of the signal of drive electrode (or induction electrode) transmission, improved the accuracy of the equipment that uses touch display screen in the time determining touch location according to the signal of drive electrode (or induction electrode) transmission.
Further, the resistivity of the material of the auxiliary conductive layer in the touch display screen that the embodiment of the present invention provides is less than the resistivity of the material of drive electrode, and be less than induction electrode material resistivity and be less than the resistivity of the material of signal transmssion line.The resistivity of the material of auxiliary conductive layer is less, the resistance of the drive electrode of covering auxiliary conductive layer is just less, the resistance of the induction electrode of covering auxiliary conductive layer is just less, the resistance of the signal transmssion line of covering auxiliary conductive layer is just less, and the accuracy of the equipment of use touch display screen in the time determining touch location according to the signal of each drive electrode (or each induction electrode) and signal transmssion line transmission is just higher.
A kind of display device that the embodiment of the present invention provides, comprises the touch display screen that the embodiment of the present invention provides.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.