CN101980124B - Touch panel - Google Patents
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- CN101980124B CN101980124B CN 201010532142 CN201010532142A CN101980124B CN 101980124 B CN101980124 B CN 101980124B CN 201010532142 CN201010532142 CN 201010532142 CN 201010532142 A CN201010532142 A CN 201010532142A CN 101980124 B CN101980124 B CN 101980124B
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Abstract
The invention discloses a touch panel. The touch panel comprises a substrate, a touch line, a plurality of sensing signal transmission leads, a plurality of electrostatic discharge conductors, an electrostatic discharge lead and a sensing signal reading line, wherein the touch line is configured on the substrate and comprises a plurality of sensing serials; the plurality of sensing signal transmission leads are configured on the substrate and are electrically connected with the plurality of sensing serials; the plurality of electrostatic discharge conductors are configured on the substrate and are electrically connected with the plurality of sensing serials; the electrostatic discharge lead is configured on the substrate; the capacitance of each sensing signal transmission lead is C1; the coupling capacitance between each electrostatic discharge conductor and the electrostatic discharge lead is C3; the sensing signal reading line is electrically connected with the sensing signal transmission lead; and for one sensing signal transmission lead and the electrostatic discharge conductor connected with the same sensing serial, the total variation amount of the C1 and the C3 is lower than the reading resolution ratio of the sensing signal reading line.
Description
Patented claim of the present invention for the applicant in the application number of on June 29th, 2009 application be 200910151255.7, denomination of invention divides an application for the application for a patent for invention of " contact panel ".
Technical field
The present invention relates to a kind of contactor control device, and relate in particular to a kind of contact panel.
Background technology
In the information age now, human dependence for electronic product grows with each passing day.Mobile computer, mobile phone, personal digital aid (PDA) (personal digital assistant, PDA), electronic product such as digital walkman all become indispensable application tool in modern's life and the work.Above-mentioned electronic product all has an input interface, must instruct in order to import user institute, so that the built-in system of electronic product automatically performs this instruction.Present most popular input interface unit comprises keyboard (keyboard), mouse (mouse) and contact panel (touch panel).
In recent years, contact panel (Touch Panel) has been widely used to electronic product miscellaneous, as: GPS (GPS), PDA(Personal Digital Assistant), mobile phone (cellular phone) and palmtop computer (Hand-held PC) etc., to replace traditional input media (as: keyboard and mouse etc.), significantly change in this design, not only promoted the man-machine interface compatibility of these electronic installations, more vacate more spaces because having omitted traditional input media, for large-scale display panel is installed, make things convenient for the user to browse data.
At present, contact panel can be divided into two types according to its type of drive and structural design, and one is electric resistance touch-control panel, and another is capacitance type touch-control panel.Wherein, capacitance type touch-control panel has the characteristic of multi-point touch simultaneously, thereby capacitance type touch-control panel receives an acclaim gradually.
Figure 1A is the top view of existing a kind of contact panel.Please refer to Figure 1A, contact panel 100 comes the touching signals of the touch control line 120 of sensing Touch Zone by the sensor chip 130 that is positioned at the neighboring area.Shown in Figure 1A, consideration based on the substrate utilization factor, the length that is positioned at the sensing signal transmission lead 110 of periphery differs, cause in one group of sensing signal transmission lead 110, the electric capacity that is positioned at the sensing signal transmission lead 110a of central sensing signal transmission lead 110b and both sides produces difference, as shown in Figure 1B, Figure 1B for the partial enlarged drawing of the sensing signal transmission lead of existing a kind of contact panel with and the synoptic diagram of capacitance size.Please refer to Figure 1B, because the electric capacity of lead is directly proportional with the length of lead, therefore as shown in Figure 1B, short sensing signal transmission lead 110b has less capacitor C 1b, and long sensing signal transmission lead 110a has bigger capacitor C 1a.
Hold above-mentioned, because the electric capacity of the sensing signal transmission lead of existing contact panel has difference, and sensor chip can sense capacitance variation very sensitive, therefore even existing contact panel faces when the user does not touch touch control line as yet, sensor chip also can be subjected to above-mentioned sensing signal transmission lead electric capacity difference influence and judge the phenomenon of touching signals by accident.Therefore, the design of existing contact panel still has some deficits and part to be solved.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of contact panel, and it can solve the problem of the touching signals erroneous judgement that causes because of electric capacity difference between the sensing signal line in the finite space.
For achieving the above object, the invention provides a kind of contact panel, it comprises that substrate, touch control line, many sensing signal transmission leads, capacitance compensation conductor and sensing signals read circuit.Touch control line is disposed on the substrate.Many the sensing signal transmission conductor configurations electrically connects on substrate and with touch control line.The capacitance compensation conductor arrangement is in sensing signal transmission lead top, and wherein, the electric capacity of each sensing signal transmission lead is C1, and the coupling capacitance between each sensing signal transmission lead and the capacitance compensation conductor is C2.Sensing signal reads circuit and the sensing signal transmission lead electrically connects, and for each bar sensing signal transmission lead, the variation of the summation of C1 and C2 is lower than sensing signal and reads the readout resolution of circuit (readout resolution).
In one embodiment of this invention, the electric capacity of each above-mentioned bar sensing signal transmission lead for example is not quite similar for (capacitance), have a coupling capacitance respectively between capacitance compensation conductor and each the sensing signal transmission lead, and the coupling capacitance between capacitance compensation conductor and each the sensing signal transmission lead is not quite similar.
In one embodiment of this invention, above-mentioned touch control line comprises a plurality of first sensing serials and a plurality of second sensing serial.A plurality of first sensing series arrangement are on base material, and wherein each first sensing serial is extended and is electrically insulated each other along a first direction.A plurality of second sensing series arrangement are on base material, and wherein each second sensing serial is extended and is electrically insulated each other along a second direction.At this moment, each first sensing serial comprises a plurality of first sensor pads and a plurality of first bridge part, each first bridge part is electrically connected at respectively between two adjacent first sensor pads, and each second sensing serial comprises a plurality of second sensor pads and a plurality of second bridge part, and each second bridge part is electrically connected at respectively between two adjacent second sensor pads.
In one embodiment of this invention, the live width of above-mentioned sensing signal transmission lead is identical in fact, and the length difference of each sensing signal transmission lead.
In one embodiment of this invention, the above-mentioned sensing signal readout resolution of reading circuit is between between-the 1pF to 1pF.
In one embodiment of this invention, above-mentioned capacitance compensation conductor and each sensing signal overlapping area of reading circuit is not quite similar.
In one embodiment of this invention, above-mentioned contact panel also comprises a dielectric layer, is disposed on the substrate to cover the sensing signal transmission lead, and wherein the capacitance compensation conductor arrangement is on dielectric layer.
And for achieving the above object, the present invention proposes a kind of contact panel in addition, and it comprises that substrate, touch control line, many sensing signal transmission lead, a plurality of static discharge conductor, a static discharge lead and sensing signals are read circuit.Touch control line is disposed on the substrate, and wherein touch control line comprises many sensing serials.Many the sensing signal transmission conductor configurations electrically connects on substrate and with the sensing serial.A plurality of static discharge conductor arrangement electrically connect on substrate and with the sensing serial.Static discharges conductor configurations on substrate, and wherein the electric capacity of each sensing signal transmission lead is C1, and the coupling capacitance that each static discharge conductor and static discharge between the lead is C3.Sensing signal reads circuit and the sensing signal transmission lead electrically connects, for for same sensing sensing signal transmission lead and static discharge conductor connected in series, the summation variation of C1 and C3 is lower than the readout resolution that sensing signal is read circuit.
In one embodiment of this invention, the coupling capacitance that discharges between lead and each the static discharge conductor of above-mentioned static is not quite similar.
In one embodiment of this invention, above-mentioned sensing serial comprises a plurality of first sensing serials and a plurality of second sensing serial.A plurality of first sensing serials are extended and are electrically insulated each other along a first direction.A plurality of second sensing serials are extended and are electrically insulated each other along a second direction.At this moment, each first sensing serial comprises a plurality of first sensor pads and a plurality of first bridge part, each first bridge part is electrically connected at respectively between two adjacent first sensor pads, and each second sensing serial comprises a plurality of second sensor pads and a plurality of second bridge part, and each second bridge part is electrically connected at respectively between two adjacent second sensor pads.
In one embodiment of this invention, the live width of above-mentioned sensing signal transmission lead is identical in fact, and the length difference of each sensing signal transmission lead.
In one embodiment of this invention, the above-mentioned sensing signal readout resolution of reading circuit is between between-the 1pF to 1pF.
In one embodiment of this invention, each above-mentioned static discharge conductor has one first point, and static release lead has a plurality of second points, and each first point is respectively in alignment with one of them second point.And each first point for example is not quite similar with the overlapping area of corresponding second point.In addition, part first point aligned with each other and the overlapping area of second point for example are 0.
Based on above-mentioned, suitably be disposed on the sensing signal transmission lead or discharge configuration mode between lead and the static discharge conductor by suitable allotment static by the capacitance compensation conductor, can compensate the electric capacity difference between the sensing signal transmission lead.In addition, by the coupling capacitance C3 between the coupling capacitance C2 between capacitor C 1, each sensing signal transmission lead and the capacitance compensation conductor of adjusting each sensing signal transmission lead or each static discharge conductor and this static release lead, make summation variation or the variation of the summation of C1 and C3 of C1 and C2 be lower than the readout resolution that sensing signal is read circuit, so can avoid the misjudged problem of touching signals, improve preferable touch-control and display quality.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Figure 1A is the top view of existing a kind of contact panel;
Figure 1B for the partial enlarged drawing of the sensing signal transmission lead of existing a kind of contact panel with and the synoptic diagram of capacitance size;
Fig. 2 A illustrates on a kind of contact panel of first embodiment of the invention and looks synoptic diagram;
Fig. 2 B is that Fig. 2 A is along the diagrammatic cross-section of AA ' profile line;
Fig. 2 C is the capacitance compensation synoptic diagram of the sensing signal transmission lead of first embodiment of the invention;
Fig. 3 A illustrates on a kind of contact panel of second embodiment of the invention and looks synoptic diagram;
Fig. 3 B is that Fig. 3 A is along the diagrammatic cross-section of AA ' profile line;
Fig. 3 C is the capacitance compensation synoptic diagram of the sensing signal transmission lead of second embodiment of the invention;
Fig. 4 A illustrate third embodiment of the invention a kind of contact panel on look synoptic diagram;
Fig. 4 B is the capacitance compensation synoptic diagram according to the sensing signal transmission lead in the contact panel of Fig. 4 A.
Wherein, Reference numeral:
100,200,300,400: contact panel
110,110a, 110b: sensing signal transmission lead
120: touch control line
210: substrate
220: touch control line
230,230a, 230a ', 230b, 230c: sensing signal transmission lead
240: the capacitance compensation conductor
250: sensing signal is read circuit
Sensing serial in 260: the first
262: the first sensor pads
264: the first bridge parts
Sensing serial in 270: the second
272: the second sensor pads
274: the second bridge parts
280: dielectric layer
242: conductive pattern
300: contact panel
320: the static discharge conductor
330: static discharges lead
340: the sensing serial
C1a, C1b, C1c, C1d: the electric capacity of sensing signal transmission lead
C2, C2a, C2b, C2c: the coupling capacitance between sensing signal transmission lead and the capacitance compensation conductor
C3, C3a, C3b, C3c: static discharge conductor and static discharge the coupling capacitance between the lead
C4, C4a, C4b, C4c, C4d: the coupling capacitance relation between sensing signal transmission lead and the corresponding capacitance compensation lead 430
Cta, Ctb, Ctc, Ctd: total capacitance
D1: first direction
D2: second direction
La, Lb, Lc: the length of sensing signal transmission lead
Embodiment
First embodiment
Fig. 2 A illustrates on a kind of contact panel of first embodiment of the invention and looks synoptic diagram.Please refer to Fig. 2 A, contact panel 200 comprises that substrate 210, touch control line 220, many sensing signal transmission leads 230, capacitance compensation conductor 240 and sensing signals read circuit 250.Touch control line 220 is disposed on the substrate 210, in order to the touch-control event of sensing user in the Touch Zone.In addition, many sensing signal transmission leads 230 are disposed on the substrate 210 and with touch control line 220 and electrically connect, and in the present embodiment, the live width of sensing signal transmission lead 230 is identical in fact, and the length difference of each sensing signal transmission lead 230.Capacitance compensation conductor 240 is disposed at sensing signal transmission lead 230 tops.The electric capacity of each sensing signal transmission lead 230 is C1, and the coupling capacitance between each sensing signal transmission lead 230 and the capacitance compensation conductor 240 is C2.Sensing signal is read circuit 250 and is electrically connected with sensing signal transmission lead 230, and sensing signal transmission is passed to sensing signal in order to the touch-control event that touch control line 220 is sensed and reads circuit 250.Specifically, for each bar sensing signal transmission lead 230, the variation of the summation of C1 and C2 is lower than sensing signal and reads the readout resolution of circuit 250 (readout resolution).
Shown in Fig. 2 A, touch control line 220 comprises a plurality of first sensing serials 260 and a plurality of second sensing serial 270, the touch-control event of doing in the Touch Zone in order to the sensing user.Wherein, the first sensing serial 260 is disposed on the substrate 210, and each first sensing serial 260 is extended and is electrically insulated each other along a first direction D1, and the second sensing serial 270 is disposed on the substrate 210, and each second sensing serial 270 is extended and is electrically insulated each other along a second direction D2.Auspicious speech it, each first sensing serial 260 comprises a plurality of first sensor pads 262 and a plurality of first bridge part 264, each first bridge part 264 is electrically connected at respectively between two adjacent first sensor pads 262, and each second sensing serial 270 comprises a plurality of second sensor pads 272 and a plurality of second bridge part 274, and each second bridge part 274 is electrically connected at respectively between two adjacent second sensor pads 272.First sensor pad 262 and second sensor pad 272 can constitute a sensing array, to reach the sensing of face.
Please refer to Fig. 2 A, in the present embodiment, the electric capacity of each bar sensing signal transmission lead 230 is for being not quite similar, and so-called electric capacity is not quite similar the electric capacity of each bar sensing signal transmission lead 230 of general reference haply for different, and the identical situation of minority is only arranged.Auspicious speech it, be respectively La, Lb and Lc as the line length of sensing signal transmission lead 230a, sensing signal transmission lead 230b among Fig. 2 A and sensing signal transmission lead 230c, and La＜Lb＜Lc.Therefore, capacitor C 1a, C1b and the C1c for sensing signal transmission lead 230a, sensing signal transmission lead 230b and sensing signal transmission lead 230c can satisfy following relationship: C1a＜C1b＜C1c.In other words, for one group of sensing signal transmission lead 230a, 230b and 230c on the right side that illustrates among Fig. 2 A, the electric capacity of these sensing signal transmission leads 230a, 230b and 230c differs from one another.
It should be noted that, consideration based on substrate 210 utilization factors, one group of sensing signal transmission lead 230 corresponding to same sensor chip can carry out layout with symmetrical manner, therefore, under this layout kenel, for same group of sensing signal transmission lead 230, has identical line length owing to present the minority sensing signal transmission lead 230 of symmetrical distribution, thereby have identical electric capacity, as sensing signal transmission lead 230a and the sensing signal transmission lead 230a ' of Fig. 2 A.In addition, in contact panel 200, corresponding to different sensing chips but the sensing signal transmission lead 230 that is positioned at identical relative position also can have identical length based on the consideration on the layout, thereby make under this layout kenel, corresponding to different sensing chips but the sensing signal transmission of identical relative position also has identical electric capacity.
Fig. 2 B is that Fig. 2 A is along the diagrammatic cross-section of BB ' profile line.Please be simultaneously with reference to Fig. 2 A and Fig. 2 B, in order to compensate different electric capacity between the above-mentioned sensing signal transmission lead 230, by being set, a capacitance compensation conductor 240 compensates electric capacity difference between the sensing signal transmission lead 230 above each sensing signal transmission lead 230.Particularly, in the present embodiment, contact panel 200 comprises that also a dielectric layer 280 is disposed on the substrate 210 to cover sensing signal transmission lead 230, wherein capacitance compensation conductor 240 is disposed on the dielectric layer 280, and capacitance compensation conductor 240 for example is not quite similar with the overlapping area that each sensing signal is read circuit 250 at the length direction of reading circuit 250 along each sensing signal, so that each sensing signal transmission lead 230 is not quite similar with this coupling capacitance between the corresponding conductive pattern 242.
In more detail, capacitance compensation conductor 240 arranges the conductive pattern 242 of different length at the length direction along each sensing signal transmission lead 230, make and produce a coupling capacitance C2 between each sensing signal transmission lead 230 and the corresponding conductive pattern 242, and each sensing signal transmission lead 230 is not quite similar with coupling capacitance C2 between the corresponding conductive pattern 242, to compensate above-mentioned difference with sensing signal transmission lead 230 of different electric capacity.
Fig. 2 C is the capacitance compensation synoptic diagram of the sensing signal transmission lead of first embodiment of the invention.Please refer to Fig. 2 A and Fig. 2 C, because the capacitance relation of sensing signal transmission lead 230a, sensing signal transmission lead 230b and sensing signal transmission lead 230c is C1a＜C1b＜C1c, therefore, have the conductive pattern 242a of big overlapping area with it and the conductive pattern 242c that has less overlapping area with it is set above sensing signal transmission lead 230c in setting above the sensing signal transmission lead 230a, make that whereby the coupling capacitance pass between each sensing signal transmission lead 230a, 230b, 230c and the capacitance compensation conductor 240 is C2a＞C2b＞C2c.Thus, for each sensing signal transmission lead 230a, 230b, 230c, total capacitance Cta, the Ctb, the Ctc that experience when transmitting touching signals are more consistent, therefore in limited substrate 210 spaces, compensated the electric capacity difference that sensing signal transmission lead 230 causes because of the length difference effectively.
Similarly, the coupling capacitance that produces between each bar sensing signal transmission lead 230 and the corresponding conductive pattern 242 only has minority identical haply for different.In other words, C1 and C2 are not the constants of fixing, and for each bar sensing signal transmission lead 230, according to its layout length, its C1 and C2 are not quite similar.
On the application of reality, when the user contacted contact panel 200 with finger, the first sensing serial 260 of contact panel 200 and the second sensing serial 270 can be in the changes of finger institute position contacting generation one electric capacity.Change on this electric capacity can be converted to a touching signals and be sent to sensing signal through the sensing signal transmission lead and read on the circuit 250, and exports a suitable instruction again to operate corresponding electronic installation after calculation process.
It should be noted that, the contact panel 200 of present embodiment can compensate electric capacity difference between each bar sensing signal transmission lead 230 by arranging of above-mentioned capacitance compensation conductor 240, makes touching signals can not influence to some extent because of electric capacity difference when different sensing signal transmission leads 230 transmit.Moreover the contact panel 200 of present embodiment is lower than the readout resolution that sensing signal is read circuit 250 by the summation variation of adjusting C1 and C2, therefore, can not cause the problem of touching signals erroneous judgement.What deserves to be mentioned is that the sensing signal readout resolution general reference sensing signal of reading circuit 250 is read the electric capacity difference that circuit 250 can pick out herein, its unit is pF.For example, to read the readout resolution of circuit 250 for example be between between-the 1pF to 1pF to sensing signal.
Second embodiment
Fig. 3 A illustrates on a kind of contact panel of second embodiment of the invention and looks synoptic diagram.Please refer to Fig. 3 A, contact panel 300 comprises that substrate 210, touch control line 220, many sensing signal transmission lead 230, a plurality of static discharge conductor 320, a static discharge lead 330 and sensing signals are read circuit 250.Touch control line 220 is disposed on the substrate 210, and wherein touch control line 220 comprises many sensing serials 340 that are disposed at the Touch Zone.Many sensing signal transmission leads 230 are disposed on the substrate 210 and with sensing serial 340 and electrically connect.A plurality of static discharge conductors 320 are disposed on the substrate 210 and with sensing serial 340 and electrically connect.Static discharges lead 330 and is disposed on the substrate 210, and wherein the electric capacity of each sensing signal transmission lead 230 is C1, and the coupling capacitance that each static discharge conductor 320 and static discharge between the lead 330 is C3 (being illustrated in Fig. 3 B).Sensing signal is read circuit 250 and is electrically connected with sensing signal transmission lead 230, for the sensing signal transmission lead 230 that is connected with same sensing serial 340 and static discharge conductor 320, the variation of the summation of C1 and C3 is lower than the readout resolution that sensing signal is read circuit 250.
Furthermore, as shown in Figure 3A, sensing serial 340 comprises a plurality of first sensing serials 260 and a plurality of second sensing serial 270.A plurality of first sensing serials 260 are extended and are electrically insulated each other along a first direction D1.A plurality of second sensing serials 270 are extended and are electrically insulated each other along a second direction D2.At this moment, each first sensing serial 260 comprises a plurality of first sensor pads 262 and a plurality of first bridge part 264, each first bridge part 264 is electrically connected at respectively between two adjacent first sensor pads 262, and each second sensing serial 270 comprises a plurality of second sensor pads 272 and a plurality of second bridge part 274, and each second bridge part 274 is electrically connected at respectively between two adjacent second sensor pads 272.First sensor pad 262 and second sensor pad 272 can constitute a sensing array, to reach the sensing of face.
In the present embodiment, the electric capacity (capacitance) of each bar sensing signal transmission lead 230 is for example for being not quite similar, and the definition that is not quite similar and first embodiment are similar, repeat no more in this.More specifically, for capacitor C 1a, the C1b and C1c of sensing signal transmission lead 230a, sensing signal transmission lead 230b and sensing signal transmission lead 230c, it satisfies following relationship: C1a＜C1b＜C1c.In the present embodiment, in order to compensate different electric capacity between the above-mentioned sensing signal transmission lead 230, by being set respectively, a static different with its overlapping area discharges lead 330 under the static discharge conductor 320 that electrically connects with each sensing signal transmission lead 230, with the electric capacity difference between the compensation sensing signal transmission lead 230.
Fig. 3 B is that Fig. 3 A is along the diagrammatic cross-section of BB ' profile line.Please be simultaneously with reference to Fig. 3 A and Fig. 3 B, contact panel 300 also comprises a dielectric layer 350, and in the present embodiment, dielectric layer 350 is disposed at static discharge conductor 320 and static discharges between the lead 330, and covers static release lead 330.Wherein, static discharge conductor 320 is disposed at partial electrostatic and discharges on the dielectric layer 350 of lead 330 tops, makes static discharge generation one coupling capacitance C3 between lead 330 and the corresponding static discharge conductor 320.The overlapping area that utilizes static to discharge each static discharge conductor 320 that lead 330 and each sensing signal transmission lead 230 electrically connect is not quite similar, and is not quite similar with coupling capacitance C3 between corresponding each static discharge conductor 320 so that static discharges lead 330.
Fig. 3 C is the capacitance compensation synoptic diagram of the sensing signal transmission lead of second embodiment of the invention.Please refer to Fig. 3 A and Fig. 3 C, because sensing signal transmission lead 230a, the capacitance relation of sensing signal transmission lead 230b and sensing signal transmission lead 230c is C1a＜C1b＜C1c, therefore order respectively with sensing signal transmission lead 230a, the static discharge conductor that sensing signal transmission lead 230b and sensing signal transmission lead 230c electrically connect is 320a, 320b and 320c, in the present embodiment, make static discharge conductor 320a and static discharge and have big overlapping area between the lead 330, and make static discharge conductor 320c and static discharge between the lead 330 having less overlapping area, make each static discharge conductor 320a whereby, 320b, it is C3a＞C3b＞C3c that 320c and corresponding static discharge that coupling capacitance between the lead 330 closes.Thus, for each sensing signal transmission lead 230a, 230b, 230c, total capacitance Cta, the Ctb, the Ctc that experience when transmitting touching signals are more consistent, therefore, in limited substrate 210 spaces, compensated the electric capacity difference that sensing signal transmission lead 230 causes because of the length difference effectively.
It should be noted that, the contact panel 300 of present embodiment can compensate electric capacity difference between each bar sensing signal transmission lead 230 by arranging of above-mentioned static discharge conductor 320, makes touching signals not influence to some extent because of electric capacity difference when different sensing signal transmission leads 230 transmit.Moreover the contact panel 300 of present embodiment is lower than the readout resolution that sensing signal is read circuit 250 by the summation variation of adjusting C1 and C3, therefore, can not cause the problem of touching signals erroneous judgement.The sensing signal readout resolution of reading circuit 250 is made a general reference sensing signal equally and is read the electric capacity difference that circuit 250 can pick out herein, and its unit is pF.For example, to read the readout resolution of circuit 250 for example be between between-the 1pF to 1pF to sensing signal.
The 3rd embodiment
Fig. 4 A illustrate third embodiment of the invention a kind of contact panel on look synoptic diagram.Please refer to Fig. 4 A, contact panel 400 and first embodiment of present embodiment are similar, only, in the present embodiment, contact panel 400 also comprises a flexible printed wiring board 410, in order to connect sensing signal transmission lead 230 and sensor chip 420, in the present embodiment, sensing signal transmission lead 230 also can be controlled its electric capacity by adjusting its live width.And in the present embodiment, to read the capacitance compensation lead 430 of the electric capacity difference of circuit 250 be to be arranged on the flexible printed wiring board 410 in order to compensate sensing signal.Shown in Fig. 4 A, the contact panel 400 of present embodiment comprises that substrate 210, touch control line 220, many sensing signal transmission leads 230, sensing signals read circuit 250 and flexible printed wiring board 410.Specifically, the capacitance compensation lead 430 that has the corresponding sensing signal transmission lead 230 of a plurality of difference at flexible printed wiring board 410, utilize the length of each capacitance compensation lead 430 identical in fact, and the live width difference of each capacitance compensation lead 430 compensate the electric capacity difference of sensing signal transmission lead 230.
Fig. 4 B is the capacitance compensation synoptic diagram according to the sensing signal transmission lead in the contact panel of Fig. 4 A.Please refer to Fig. 4 A and Fig. 4 B, because the capacitance relation between the sensing signal transmission lead 230 is C1a＞C1b＞C1c＞C1d, therefore, the live width of the capacitance compensation lead 430 that is connected with sensing signal transmission lead 230a, 230b, 230c, 230d respectively on the flexible printed wiring board 410 can being increased in regular turn, is C4a＜C4b＜C4c＜C4d so that each sensing signal transmission lead 230a, 230b, 230c, 230d close with the coupling capacitance between the corresponding capacitance compensation lead 430.Thus, for each sensing signal transmission lead 230a, 230b, 230c, 230d, total capacitance Cta, the Ctb, Ctc, the Ctd that experience when transmitting touching signals are more consistent, therefore, in limited substrate 210 spaces, compensated the electric capacity difference that sensing signal transmission lead 230 causes because of the length difference effectively.
Certainly, be lower than the readout resolution that sensing signal is read circuit 250 at the contact panel 400 of present embodiment by the summation variation of adjusting C1 and C4, therefore the problem that can not cause touching signals to judge by accident.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (5)
1. a contact panel is characterized in that, comprising:
One substrate;
One touch control line is disposed on this substrate, and wherein this touch control line comprises many sensing serials:
Many sensing signal transmission leads are disposed on this substrate and electrically connect with those sensing serials;
A plurality of static discharge conductors are disposed on this substrate and electrically connect with those sensing serials;
One static discharges lead, is disposed on this substrate, and wherein respectively the electric capacity of this sensing signal transmission lead is C1, and respectively the coupling capacitance between this static discharge conductor and this static release lead is C3; And
One sensing signal is read circuit, electrically connect with those sensing signal transmission leads, for a sensing signal transmission lead and the static discharge conductor connected in series with same sensing, the summation variation of C1 and C3 is lower than the readout resolution that this sensing signal is read circuit, and wherein this readout resolution is that sensing signal is read the electric capacity difference that circuit can pick out.
2. contact panel according to claim 1 is characterized in that, those sensing serials comprise:
A plurality of first sensing serials are extended and are electrically insulated each other along a first direction; And
A plurality of second sensing serials, extend and be electrically insulated each other along a second direction, wherein respectively this first sensing serial comprises a plurality of first sensor pads and a plurality of first bridge part, respectively this first bridge part is electrically connected at respectively between two adjacent first sensor pads, respectively this second sensing serial comprises a plurality of second sensor pads and a plurality of second bridge part, and respectively this second bridge part is electrically connected at respectively between two adjacent second sensor pads.
3. contact panel according to claim 1 is characterized in that, the live width of those sensing signal transmission leads is identical, respectively the length difference of this sensing signal transmission lead.
4. contact panel according to claim 1 is characterized in that, the readout resolution that this sensing signal is read circuit is between between-the 1pF to 1pF.
5. contact panel according to claim 1, it is characterized in that, respectively this static discharge conductor has one first point, this static discharges lead and has a plurality of second points, and respectively this first point is respectively in alignment with one of them second point, and wherein part first point aligned with each other and the overlapping area of second point are 0.
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| CN 201010532142 CN101980124B (en) | 2009-06-29 | 2009-06-29 | Touch panel |
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| CN 201010532142 CN101980124B (en) | 2009-06-29 | 2009-06-29 | Touch panel |
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| CNA2009101512557A Division CN101604218A (en) | 2009-06-29 | 2009-06-29 | Contact panel |
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| CN101980124A CN101980124A (en) | 2011-02-23 |
| CN101980124B true CN101980124B (en) | 2013-07-03 |
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| TWI453635B (en) * | 2011-08-05 | 2014-09-21 | Chunghwa Picture Tubes Ltd | Touch panel |
| CN102253754B (en) * | 2011-08-16 | 2013-07-24 | 华映视讯（吴江）有限公司 | Touch panel |
| KR102286730B1 (en) * | 2014-06-13 | 2021-08-09 | 미래나노텍(주) | Touch sensor comprising atypical sensor pattern and touchscreen panel using the same |
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| CN1746966A (en) * | 2005-10-21 | 2006-03-15 | 友达光电股份有限公司 | Display panel |
| CN101329610A (en) * | 2008-07-25 | 2008-12-24 | 友达光电股份有限公司 | Method capable of mending touch control type apparatus and touch control type panel |
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| CN101980124A (en) | 2011-02-23 |
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