Accompanying drawing explanation
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is a kind of schematic diagram of known touch control display apparatus;
Fig. 2 is the decomposing schematic representation of a kind of contactor control device of present pre-ferred embodiments;
Fig. 3 is the schematic side view of the contactor control device shown in Fig. 2;
Fig. 4 to Fig. 6 is the sequential chart of the first signal of present pre-ferred embodiments, secondary signal and the different aspects of mask signal;
Fig. 7 is the schematic side view of another contactor control device of present pre-ferred embodiments;
Fig. 8 is the first electrode of another contactor control device of present pre-ferred embodiments and the schematic top plan view of the second electrode;
Fig. 9 A and Fig. 9 B is the schematic side view of another contactor control device of present pre-ferred embodiments;
Figure 10 A to Figure 10 C is the schematic diagram of the difference change aspect of the shielding electrode of present pre-ferred embodiments;
Figure 11 is the flow chart of steps of the driving method of a kind of contactor control device of present pre-ferred embodiments; And
Figure 12 is the block schematic diagram of a kind of image display system of present pre-ferred embodiments.
Main element symbol description:
1: touch control display apparatus
11: display panel
12: contact panel
13: shielding layer
2,3,4,4a, 4b, 5a, 5b: contactor control device
20,30: contact panel
21,31: substrate
22,32,42,42a, 42b, X1 ~ XN: the first electrode
23,33,43,43a, 43b, Y1 ~ YN: the second electrode
24,34: sensing driving circuit
25,25a, 35,45a, 45b: shielding electrode
251: strip shaped electric poles portion
252: wire
26,36,46a, 46b: insulation course
451,453: main part
452,454, B: connecting portion
57a, 57b: display panel
571: common electrode
C: mask signal
S
1: the first signal
S
2: secondary signal
S01 ~ S03: the step of driving method
Embodiment
Hereinafter with reference to relevant drawings, a kind of contactor control device according to present pre-ferred embodiments and driving method thereof are described, wherein identical element is illustrated with identical reference marks.
Fig. 2 is the decomposing schematic representation of a kind of contactor control device 2 of present pre-ferred embodiments, and Fig. 3 is the schematic side view of contactor control device 2.Please refer to shown in Fig. 2 and Fig. 3, to illustrate that the structure of contactor control device 2 makes flowing mode with it.
Contactor control device 2 comprises a contact panel 20, with a substrate 21, multiple first electrode 22 and multiple second electrode 23 and senses driving circuit 24 and a shielding electrode 25.Wherein, substrate 21 can be a dull and stereotyped or film, and its material can be such as glass, plastic cement or other tool dielectric materials.In the present embodiment, substrate 21 is a glass substrate.
First electrode 22 is arranged at substrate 21 and is intervally installed.In the present embodiment, " setting " can refer to directly link or indirectly link.In this, the first electrode 22 is directly arranged at one of substrate 21 on the surface.First electrode 22 is made up of conductive material, such as electrically conducting transparent material, as indium tin oxide (ITO) or indium-zinc oxide (IZO), and these first electrodes 22 are intervally installed and arranged in parallel, and the shape of the first electrode 22 is for strip.
Second electrode 23 is arranged at substrate 21 and is intervally installed, and the second electrode 23 directly can be arranged on substrate 21 or be arranged on substrate 21 by least one rete; In this, the second electrode 23 and the first electrode 22 are positioned at the same side of substrate 21, and an insulation course 26 is arranged between the first electrode 22 and the second electrode 23.Second electrode 23 is made up of conductive material equally, such as electrically conducting transparent, and these second electrodes 23 are intervally installed and arranged in parallel, and the shape of the second electrode 23 is for strip.
It should be noted that, the first electrode 22 that the present embodiment defines also can be used as the second electrode, and the second electrode 23 can be used as the first electrode, commutative between the two.Define these first electrodes 22 for column electrode in this, these second electrodes 23 be row electrode, and these first electrodes 22 and these second electrodes 23 are in spatially for being crisscross arranged, and shape has angle.It seems in projecting direction, these first electrodes 22 and these second electrodes 23 are in fact in 90 degree.
Shielding electrode 25 can be arranged at the same side of substrate 21 and the first electrode 22 or the second electrode 23, or is arranged at the opposite side of substrate 21; In this, the first electrode 22 and the second electrode 23 are positioned at the same side of substrate 21, and shielding electrode 25 is arranged at the opposite side of substrate 21, and namely substrate 21 is between shielding electrode 25 and the first electrode 22 and the second electrode 23.
As shown in Figure 3, sensing driving circuit 24 is electrically connected with the second electrode 23 and shielding electrode 25, and in order to drive the second electrode 23 and shielding electrode 25, and one of them person of the signal of the signal of shielding electrode 25 and these first electrodes 22 and these the second electrodes 23 is made to be synchronous; In this, the signal of shielding electrode 25 is synchronous with the signal of these the second electrodes 23.In this, signal synchronously refers to that the frequency of two signals is identical with phase place essence.In addition, the driving of the first electrode 22 also can be undertaken by sensing driving circuit 24.
Because capacitor storage power formula is W=1/2*CV
2, wherein W refers to energy, and C refers to capacitance, and V refers to the potential difference (PD) at capacitor two ends.Therefore when the signal of shielding electrode 25 is synchronous with the signal of these the second electrodes 23, the capacitor formed between shielding electrode 25 and the second electrode 23 there is no and stores any energy and electric charge, so that can not capacity effect be formed between shielding electrode 25 and the second electrode 23, thus can reduce the impact of the capacitance sensing load of contactor control device 2.
These first electrodes 22 and these the second electrodes 23 is driven respectively below, so that the start of sensing driving circuit 24 to be described to sense driving circuit 24.Sensing driving circuit 24 transmits one first signal respectively to these the first electrodes 22, transmit a secondary signal respectively to these the second electrodes 23, and transmit a mask signal to shielding electrode 25, the sequential chart of the first signal, secondary signal and the different aspects of mask signal is illustrated below with Fig. 4 to Fig. 6.
Please refer to shown in Fig. 4, sensing driving circuit 24 transmits the first signal S respectively
1to these first electrodes Y
1~ Y
n, wherein, the first signal S
1quantity and the first electrode Y
1~ Y
nquantity identical.Fig. 3 is only with the first signal S
1be transferred into two the first electrode Y respectively
1, Y
2explain.In this, sensing driving circuit 24 is that P-SCAN drives these first electrodes Y
1~ Y
n, in the namely unit interval, only have first electrode to be driven.As each first electrode Y
1~ Y
nduring by turntable driving, sensing driving circuit 24 transmits secondary signal S
2to these second electrodes X
1~ X
n, namely drive these second electrodes X simultaneously
1~ X
n, make the first signal S
1with secondary signal S
2work period (duty cycle) overlapping.Wherein, secondary signal S
2quantity and the second electrode X
1~ X
nquantity identical.And sense driving circuit 24 and sense the second electrode X
1~ X
non signal be applied to touch-control calculate and obtain position of touch.And the mask signal C of the shielding electrode 25 and secondary signal S of these the second electrodes 23
2synchronously.In this, mask signal C and secondary signal S
2amplitude essence identical, or amplitude is worse than within 10% mutually, minimum to make capacity effect to each other be down to.In addition, the first signal S
1amplitude be greater than secondary signal S
2amplitude.
Please refer to shown in Fig. 5, be with the sequential chart main difference shown in Fig. 4, the secondary signal S in Fig. 5
2respectively at the first signal S
1just occur afterwards, and both work periods are not overlapping.In this, the mask signal C of shielding electrode 25 and these second electrodes X
1~ X
nsecondary signal S
2synchronously.
Please refer to shown in Fig. 6, be with the sequential chart main difference shown in Fig. 5, the secondary signal S in Fig. 6
2at the first signal S
1occur afterwards, but both work periods (duty cycle) overlap.In this, the mask signal C of shielding electrode 25 and these second electrodes X
1~ X
nsecondary signal S
2synchronously.
Fig. 7 is the schematic side view of another contactor control device 3 of present pre-ferred embodiments.Contactor control device 3 comprises a contact panel 30, with a substrate 31, multiple first electrode 32 and multiple second electrode 33 and senses driving circuit 34 and a shielding electrode 35.Be with contactor control device 2 main difference, the first electrode 32 of contactor control device 3 and the second electrode 33 lay respectively at the opposite side of substrate 31, and shielding electrode 35 is arranged at the side of the first electrode 32 by an insulation course 36.In this, sensing driving circuit 34 is electrically connected with shielding electrode 35 with the first electrode 32, second electrode 33, and the signal of shielding electrode 35 is synchronous with the signal of these the second electrodes 33.
Fig. 8 is the first electrode 42 of another contactor control device 4 of present pre-ferred embodiments and the schematic top plan view of the second electrode 43.Be with above-mentioned main difference, the first electrode 42 and the second electrode 43 are positioned at same plane.In this, the first electrode 42 and the second electrode 43 have electrode section and the bridge part of such as rhombus or flat shape quadrilateral respectively, and these electrode section are positioned at same plane and do not connect mutually.In addition, the bridge part of the first electrode 42 and the second electrode 43 overlapping arranges an insulation course (scheming not show), to completely cut off the signal of the first electrode 42 and the second electrode 43.
Fig. 9 A is the schematic side view of another contactor control device 5a of present pre-ferred embodiments.Differently from above-mentioned aspect be, contactor control device 5a more comprises a display panel 57a, and display panel 57a and substrate 21 are oppositely arranged.The present embodiment does not limit the kind of display panel 57a, and it can such as display panels, organic LED display panel, Plasmia indicating panel, Field Emission Display panel etc.Shielding electrode 25 between display panel 57a and the first electrode 22 and the second electrode 23, and produces bridging effect to the signal of display panel 57a.
Fig. 9 B is the schematic side view of another contactor control device 5b of present pre-ferred embodiments.Be with contactor control device 5a main difference, the shielding electrode 25 of contactor control device 5b is positioned within display panel 57b, but be arranged in display panel 57b, community electrode 571 on optical filtering substrate and between these the second electrodes 23, and then bridging effect is produced to avoid the signal affecting the first electrode 22 and the second electrode 23 to the signal of common electrode less than 571.
In addition, the shielding electrode 25 shown in Fig. 2 is plane, i.e. pattern-free.But shielding electrode of the present invention can have multiple change aspect, illustrate with Figure 10 A to Figure 10 C below.
Please refer to shown in Figure 10 A, the shielding electrode 25a of the another kind of aspect of present pre-ferred embodiments is strip, namely shielding electrode 25a has multiple strip shaped electric poles portion 251, and parallel interval of establishing side by side, strip shaped electric poles portion 251 is arranged, and by wire 252 connect to transmit mask signal.Wherein, the pattern in the strip shaped electric poles portion 251 of shielding electrode 25a may correspond to the pattern of the second electrode 23; Such as, the area that the pattern in a strip shaped electric poles portion 251 may correspond to shared by many second electrodes 23 designs.In addition, the shielding electrode 25a of strip compensating circuit of can arranging in pairs or groups again carries out the compensation of signal, to avoid the distance because of each shielding electrode 25a distance sensing driving circuit, and has an impact.Wherein, compensating circuit can such as compensate for the line route Length discrepancy of the mask signal in each strip shaped electric poles portion 251.
Please refer to shown in Figure 10 B, Figure 10 B is the first electrode 42a of another contactor control device 4a of present pre-ferred embodiments and the schematic top plan view of the second electrode 43a.First electrode 42a and the second electrode 43a is arranged at isoplanar.Shielding electrode 45a and the first electrode 42a or the second electrode 43a is arranged at isoplanar; In this, shielding electrode 45a and the first electrode 42a and the second electrode 43a is arranged at isoplanar.Shielding electrode 45a is formed between the first electrode 42a and the second electrode 43a, and has multiple main part 451 and multiple connecting portion 452, and each connecting portion 452 connects main part 451 between two, with the whole shielding electrode 45a of conducting.Certainly, connecting portion 452 is striding across the first electrode 42a or the second electrode 43a place need arrange an insulation course 46a (dotted line place) to reach electrical isolation.In addition, also needed a junction B to carry out cross-over connection by the second electrode 43a separated, connecting portion 452, B can be linear or shaped form; In this, connecting portion 452, B are for linear.
Please refer to shown in Figure 10 C, Figure 10 C is the first electrode 42b of another contactor control device 4b of present pre-ferred embodiments and the schematic top plan view of the second electrode 43b.First electrode 42b and the second electrode 43b is arranged at isoplanar.Shielding electrode 45b and the first electrode 42b or the second electrode 43b is arranged at isoplanar; In this, shielding electrode 45a and the first electrode 42b and the second electrode 43b is arranged at isoplanar.Shielding electrode 45a is formed between the first electrode 42a and the second electrode 43a, and has multiple main part 453 and multiple connecting portion 454, and each connecting portion 454 connects main part 453 between two.Certainly, connecting portion 454 is striding across the first electrode 42b or the second electrode 43b place need arrange an insulation course 46b to reach electrical isolation.In addition, also needed a junction B to carry out cross-over connection by the second electrode 43a separated, in this, connecting portion 454, B are snakelike (snake-like), can reach effect that metal is not easily reflective.In addition, main part 453 shape of shielding electrode 45b is not identical with main part 451 shape of Figure 10 B yet, in this, be have for main part 453 portion of expanding, and connecting portion 454 is connected across between two main parts 453.
Figure 11 is the flow chart of steps of the driving method of a kind of contactor control device of present pre-ferred embodiments, and driving method can be applicable to above-mentioned arbitrary contactor control device, is be applied to contactor control device 2 for example to explain in this.Contactor control device 2 comprises contact panel 20, shielding electrode 25 and a sensing driving circuit 24 with a substrate, multiple first electrode 22 and multiple second electrode 23, and this sensing driving circuit 24 controls these first electrodes 22, these second electrodes 23 and this shielding electrode 25 that are electrically connected respectively.Driving method comprises: transmit one first signal S
1to these first electrodes Y
1~ Y
n(S01) a secondary signal S, is transmitted
2to these second electrodes X
1~ X
n(S02) and transmit a mask signal to shielding electrode 25, mask signal C and the first signal S
1and secondary signal S
2one of them person be synchronous (S03).
Wherein, the first signal S
1these first electrodes Y can be given in proper order
1~ Y
n, or give these first electrodes Y simultaneously
1~ Y
n, secondary signal S
2these second electrodes X can be given in proper order
1~ X
n, or give these second electrodes X simultaneously
1~ X
n.In this, the first signal S
1in proper order to these first electrodes Y
1~ Y
n, secondary signal S
2simultaneously to these second electrodes X
1~ X
n.In addition, because the other technologies feature of driving method describes in detail in the lump in above-described embodiment, therefore its details repeats no more in this.
In sum, in contactor control device of the present invention and driving method thereof, a mask signal is sent to shielding electrode, and mask signal is synchronous with one of them person of the first signal of the first electrode and the secondary signal of the second electrode.Whereby, potential difference (PD) is there is no between shielding electrode and the first electrode or the second electrode, so that it is zero that the capacity effect of shielding electrode and the first electrode or the second electrode is close to, and thus can reduce the sensing load of contactor control device to electric capacity, and then promote the touch-control sensitivity of contactor control device.In addition, shielding electrode can form capture-effect to the signal of display panel, and the signal between display panel and contact panel can be allowed to interfere with each other.
Figure 12 shows image display system block schematic diagram according to an embodiment of the invention, it may be implemented in above-mentioned arbitrary contactor control device, such as: panel computer (tablet personal computer), projector, e-book, notebook computer, mobile phone, digital camera, personal digital aid (PDA) (PDA), desktop computer, televisor, vehicle display or portable DVD player.And this input block is coupled to contactor control device, in order to provide input signal (such as, signal of video signal) to contactor control device, make contactor control device show image.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.