CN102103450B - Resistance-type touch panel - Google Patents
Resistance-type touch panel Download PDFInfo
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- CN102103450B CN102103450B CN 200910254376 CN200910254376A CN102103450B CN 102103450 B CN102103450 B CN 102103450B CN 200910254376 CN200910254376 CN 200910254376 CN 200910254376 A CN200910254376 A CN 200910254376A CN 102103450 B CN102103450 B CN 102103450B
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Abstract
The invention discloses a resistance-type touch panel and a driving method thereof. A driving panel comprises a first substrate, a first conductive layer, a first lead, a second lead, a third lead, a fourth lead, a second substrate, a second conductive layer, a fifth lead, a sixth lead and a driving circuit, wherein the first conductive layer is arranged on the first substrate and is provided with a first corner, a second corner, a third corner and a fourth corner which are different from one another; the first lead is arranged on the first substrate and is electrically connected with the first corner; the second lead is arranged on the first substrate and is electrically connected with the second corner; the third lead is arranged on the first substrate and is electrically connected with the third corner; the fourth lead is arranged on the first substrate and is electrically connected with the fourth corner; the second substrate is parallel to the first substrate; the second conductive layer is arranged on the second substrate and faces the first conductive layer; the fifth lead is electrically connected with a first side edge of the second conductive layer; the sixth lead is electrically connected with a second side edge of the second conductive layer; and the driving circuit is electrically connected with the first lead, the second lead, the third lead, the fourth lead, the fifth lead and the sixth lead.
Description
Technical field
The invention relates to a kind of driving method, and particularly relevant for a kind of driving method of electric resistance touch-control panel.
Background technology
In general, general touch-control electronic product can adopt 4 line formulas or 5 wire resistance type touch panels.Yet 4 line formulas or 5 wire resistance type touch panels are because the relation of its structure, cause 4 line formulas or 5 wire resistance type touch panels can't the sensing multi-point touch.
Summary of the invention
The invention provides a kind of driving method of electric resistance touch-control panel, can correctly detect 6 wire resistance type touch panels for being in single-point contact or multi-point touch, and correctly judge the operating gesture of multi-point touch.
The present invention proposes a kind of electric resistance touch-control panel, and it comprises one first substrate, one second substrate, one first conductive layer, one second conductive layer, one first lead, one second lead, a privates, privates, one the 5th lead, one the 6th lead and one drive circuit.First conductive layer is disposed on first substrate, has one first different corner, one second corner, a third angle falls and one the 4th corner.First conductor configurations is on first substrate and be electrically connected first corner.Second conductor configurations is on first substrate and be electrically connected second corner.Privates is disposed on first substrate and is electrically connected third angle.Privates are disposed on first substrate and are electrically connected the 4th corner.Second substrate is parallel to first substrate.Second conductive layer is disposed on second substrate, and towards first conductive layer.The 5th lead is electrically connected a first side of second conductive layer.The 6th lead is electrically connected a second side of second conductive layer.Driving circuit is electrically connected first lead, second lead, privates, privates, the 5th lead and the 6th lead.Described electric resistance touch-control panel utilizes a driving method to drive, and described driving method comprises and provide a system voltage to described the 6th lead, and provides a ground voltage to described second lead, and wherein said system voltage is greater than described ground voltage; When described electric resistance touch-control panel was touched, described the 5th lead was exported one first state-detection voltage, and described privates are exported one second state-detection voltage; Calculate a contact resistance value according to described first state-detection voltage and the described second state-detection voltmeter, wherein said contact resistance value is (Vs1-Vs2)/I, wherein Vs1 is the described first state-detection voltage, Vs2 is the described second state-detection voltage, and I is the electric current of described the 6th lead of flowing through; Judge that according to described contact resistance value described electric resistance touch-control panel is in a single-point contact state or a multi-point touch state, wherein when described contact resistance value during greater than an impedance critical value, described electric resistance touch-control panel is in described single-point contact state, and when described contact resistance value was less than or equal to described impedance critical value, described electric resistance touch-control panel was in described multi-point touch state; And when described electric resistance touch-control panel is in described multi-point touch state, according to a described contact resistance value and a previous contact resistance value judge a plurality of touch points on described electric resistance touch-control panel be mutual close or mutually away from, be applied to the operating gesture of described electric resistance touch-control panel with judgement.
The present invention proposes a kind of driving method of electric resistance touch-control panel in addition, be used for a kind of electric resistance touch-control panel, the driving method of this electric resistance touch-control panel comprises the following steps: to provide one first voltage to the six leads, and one second voltage to the second lead is provided, and wherein first voltage is greater than second voltage; When electric resistance touch-control panel was touched, the 5th lead was exported one first state-detection voltage, and privates are exported one second state-detection voltage; Calculate a contact resistance value according to the first state-detection voltage and the second state-detection voltmeter; Judge that according to contact resistance value electric resistance touch-control panel is in a single-point contact state or a multi-point touch state; When electric resistance touch-control panel is in the multi-point touch state, according to a contact resistance value and a previous contact resistance value judge a plurality of touch points on electric resistance touch-control panel be close mutually or mutually away from, be applied to the operating gesture of electric resistance touch-control panel with judgement.
State feature and advantage on the present invention and can become apparent for allowing, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Figure 1A is the structural representation according to the contact panel of one embodiment of the invention;
Figure 1B is the process flow diagram of driving method of the contact panel of Figure 1A;
Fig. 2 A is the single-point contact synoptic diagram of the contact panel of Figure 1A;
Fig. 2 B is the schematic equivalent circuit of Fig. 2 A;
Fig. 3 A is the multi-point touch synoptic diagram of the contact panel of Figure 1A;
Fig. 3 B is the schematic equivalent circuit of Fig. 3 A;
Fig. 4 A is another multi-point touch synoptic diagram of the contact panel of Figure 1A;
Fig. 4 B is the schematic equivalent circuit of Fig. 4 A.
The main element symbol description:
100: contact panel 110,120: substrate
112,122: transparency conducting layer 114: a plurality of conductive patterns
124,126: conductor bar 130: driving circuit
132,134,136,138,144: driver
140,142,146: detecting device W1 ~ W6: lead
SW1, SW2: switch C1 ~ C5: touch points
Vcc: system voltage Vw6, Vs1, Vs2: voltage
R0, R21 ~ R23, R31 ~ R38, R3a ~ R3d, R41 ~ R48, R4a ~ R4d: equivalent resistance
S102, S104, S106, S108, S110, S112, S114, S116, S118, S120: step
Embodiment
Figure 1A is the structural representation according to the contact panel of one embodiment of the invention.Please refer to Figure 1A, contact panel 100 comprises a substrate 110, a substrate 120 and one drive circuit 130, and wherein the contact panel 100 of present embodiment can be an electric resistance touch-control panel.On the surface of substrate 120, dispose transparency conducting layer 112 and lead W1, W2, W3 and W4 at substrate 110.According to direction shown in Figure 1A, the upper left corner of transparency conducting layer 112 partly can be electrically connected with lead W1, the lower left corner of transparency conducting layer 112 partly can be electrically connected with lead W2, the lower right corner of transparency conducting layer 112 partly can be electrically connected with lead W3, and the upper right corner of transparency conducting layer 112 partly can be electrically connected with lead W4.By this, each corner part of transparency conducting layer 112 can see through lead W1, W2, W3 and W4 respectively and be electrically connected to driving circuit 130.That is to say that transparency conducting layer 112 is essentially a rectangular conductive layer, and its four corners are connected to driving circuit 130 through lead W1, W2, W3 and W4 respectively.
In addition, the circumferential arrangement of transparency conducting layer 112 has directly contact transparency conducting layer 112 of a plurality of conductive patterns 114 and this a little conductive patterns 114, so that the electric field of transparency conducting layer 112 sides can not be subjected to the resistive of transparency conducting layer 112 and be out of shape.The material of conductive pattern 114 can for metal (for example: silver).The conductive pattern 114 that present embodiment illustrates with dotted line in fact can by a plurality of straight line line segments or institutes such as warpage line segment or curved segments form.
On the surface of substrate 110, then dispose transparency conducting layer 122, conductor bar 124 and conductor bar 126 at substrate 120.Conductor bar 124 is disposed at a wherein side of transparency conducting layer 122, and directly contacts transparency conducting layer 122.Conductor bar 126 can be formed at the ㄧ side in addition of transparency conducting layer 122, and directly contacts transparency conducting layer 122.In addition, lead W5 and lead W6 are connected to conductor bar 124 and conductor bar 126.
What deserves to be mentioned is, above-mentioned institute carry " on ", D score, " left side " reach " right side " only in order to the collocation diagram so that present embodiment is described, and other embodiment of the present invention are not as limit.
In the present embodiment, driving circuit 130 can be circumscribed be connected in contact panel 100, or in be built on substrate 110 or the substrate 120.In driving circuit 130, driver 132 electrical connecting wire W1, driver 134 electrical connecting wire W2, driver 136 electrical connecting wire W3, driver 138 electrical connecting wire W4, detecting device 140 sees through switch SW 1 electrical connecting wire W4, detecting device 142 electrical connecting wire W5, driver 144 sees through resistance R 0 electrical connecting wire W6, and detecting device 146 sees through switch SW 2 electrical connecting wire W6.In the present embodiment, driver 132,134,136,138,144 exportable system voltages, export ground voltage or present high impedance status (Hi-Z).140,142 and 146 of detecting devices are in order to detecting magnitude of voltage, and have very high input impedance.
Please refer to Figure 1A and Figure 1B, suppose earlier that at this contact panel 100 is in the single-point contact state.At first, driver 136 and 138 can provide system voltage to lead W3 and W4 respectively, and driver 132 and 134 can provide ground voltage respectively to lead W1 and W2(step S102).At this moment, driver 144 presents high impedance status, and switch SW 1 and SW2 are not conducting, detect the detection voltage of touch points corresponding to X-axis by this.
In detail, the voltage on transparency conducting layer 112 right sides can be higher than the voltage in left side.When touch action took place, transparency conducting layer 112 and transparency conducting layer 122 were in the touch points conducting.Therefore, the dividing potential drop of touch points position can conduct to the conductor bar 124 on the substrate 120, exports detecting device 142(step S104 to see through lead W5), wherein this dividing potential drop is the detection voltage of X axis.Touch points more near the left side of transparency conducting layer 112 then the detection voltage of X axis more near ground voltage.Therefore, the size of detection voltage can be in order to judge the position of touch points.
Then, driver 134 and 136 can provide system voltage to lead W2 and W3 respectively, and driver 132 and 138 can provide ground voltage respectively to lead W1 and W4(step S106).At this moment, driver 144 presents high impedance status, and switch SW 1 and SW2 are not conducting, detects the detection voltage of touch points corresponding to Y-axis by this.Similarly, detecting device 142(step S108) can receive Y-axis to detection voltage.
Then, the contact panel 100 of present embodiment still can be judged different touching patterns and user's touching gesture.Wherein, the judgment mode of touching pattern for example is to make driving circuit 130 present following state: driver 144 provides system voltage to lead W6, and driver 134 provides ground voltage to lead W2(step S110), and driver 132,136,138 presents high impedance status.In addition, switch SW 1 and SW2 then are conducting, can detect contact panel 100 by this for being in touchless, single-point contact or multi-point touch.
In detail, Fig. 2 A is the single-point contact synoptic diagram of the contact panel of Figure 1A.Fig. 2 B is the schematic equivalent circuit of Fig. 2 A.Please refer to Figure 1A, Fig. 2 A, when the user touches touch points C1, touching a C1 and can form resistance R 22(and have contact resistance value in transparency conducting layer 112 and 122), can form resistance R 23 between touch points C1 and the lead W2, can form resistance R 21 between touch points C1 and the lead W6, wherein above-mentioned resistance is in order to the impedance operator of expression transparency conducting layer 112 and 122.
Please be simultaneously with reference to Figure 1A and Fig. 2 B, because driver 144 sees through resistance R 0 electrical connecting wire W6, so resistance R 0 can be connected with resistance R 21, R22 and R23.Coupling of 21 of resistance R 0 and resistance R can output voltage V w6, coupling of 22 of resistance R 21 and resistance R can be exported the first state-detection voltage Vs1, coupling between resistance R 22 and R23 can be exported the second state-detection voltage Vs2, and wherein voltage Vw6, the first state-detection voltage Vs1 and the second state-detection voltage Vs2 can be sent to detecting device 146,142 and 140(step S112 respectively).
At this supposing the system voltage vcc is 3.3V, and resistance R 0 is 300 ohm, and detected voltage Vw6 is 2.36V, and the first state-detection voltage Vs1 is 1.97V, and the second state-detection voltage Vs2 is 0.875V.According to above-mentioned, the electric current I that can calculate the lead W6 that flows through is (3.3-2.36)/300=3.13mA.Then, utilize electric current I and state-detection voltage Vs1 and Vs2 to calculate the contact resistance value (step S114) of resistance R 22 again, that is contact resistance value is (1.97-0.875)/3.13=350 Ω.
As mentioned above, when carrying out the initializing set of contact panel 100, can guide the user to carry out single-point contact operation (that is contact panel 100 is in the single-point contact state).Therefore, when carrying out initializing set, contact panel 100 stores the contact resistance value that is calculated and then can be used as default contact resistance value.When contact panel 100 was in multi-point touch, the situation of multi-point touch can make the flow path of electric current can be different from the situation of single-point contact, so the distribution of impedance can be different from single-point contact.Contact panel 100 just can compare the contact resistance value that receives and default contact resistance value and judge that contact panel 100 is in single-point contact state or multi-point touch state (step S116).
Separate single-point contact or multi-point touch in order to know, can set the dividing line of an impedance critical value as single-point contact or multi-point touch, its middle impedance critical value can be the weighted value (being impedance critical value=default contact resistance value * ratio) of a default contact resistance value and a ratio, and ratio can be one of them numerical value in 0.3 ~ 0.8, and this is different for the foundation circuit design.
When contact panel 100 is in the single-point contact state, then according to above-mentioned steps S102 to the axial detection voltage of the corresponding X-axis of step S108 gained and Y-axis orient respectively touch points in X axis and Y-axis to position (step S118).This position fixing process is similar in appearance to the localization method of 5 line formula contact panels, and this area knows that usually the knowledgeable can understand voluntarily, does not then give unnecessary details at this.
When contact panel 100 is in the multi-point touch state, present embodiment can according to contact resistance value that is calculated instantly and previous contact resistance value judge a plurality of touch points for mutually near or mutually away from (S120).In addition, when contact panel 100 was in the touchless state, the voltage that the detecting device 146 in the driving circuit 130 is obtained equaled the system voltage that driver 144 is exported.Therefore, the execution flow process that is under the touchless state at contact panel 100 is step S102, S104, S106, S108 and S110 in regular turn, then then finishes.Below will illustrate touch points for mutually near or mutually away from judgment mode.
Fig. 3 A is the multi-point touch synoptic diagram of the contact panel of Figure 1A.Fig. 3 B is the schematic equivalent circuit of Fig. 3 A.Please refer to Fig. 3 A, when the user touches touch points C2 and C3, contact point in transparency conducting layer 112 and 122 can form resistance R 32 and R35, can form resistance R 33 and R36 respectively between touch points C2 and C3 and the lead W2, can form resistance R 3d and R3c respectively between touch points C2 and C3 and the lead W4, can form resistance R 3b and R3a between touch points C2 and C3 and the lead W5, resistance R 31 and R34 be can form between touch points C2 and C3 and the lead W6, can resistance R 37 and R38 be formed respectively at transparency conducting layer 112 and 122 between touch points C2 and C3.
Please refer to Fig. 3 B, in step S112, because contact surface plate 100 is touched, so still can output voltage V w6, state-detection voltage Vs1, state-detection voltage Vs2.This still the supposing the system voltage vcc be 3.3V, output resistance R0 is 300, and detected voltage Vw6 is 1.82V, the first state-detection voltage Vs1 is 1.55V, the second state-detection voltage Vs2 is 0.742V.According to above-mentioned, electric current I is (3.3-1.82)/300=4.92mA, and contact resistance value is (1.55-0.742)/4.92=164.2 Ω, wherein the contact resistance value that is calculated under the multi-point touch state is the equivalent resistance between lead W4 and W5, but not the actual resistance of resistance R 32 or R35.Because result of calculation can learn that the contact resistance value under multi-point touch (i.e. 164.2 Ω) therefore can judge that contact panel 100 is in the multi-point touch state much smaller than default contact resistance value (i.e. 350 Ω).
In addition, under the situation of multi-point touch, can cause the resistance of the resistance between a plurality of touch points to change, and then have influence on the size of contact resistance value (being the equivalent resistance between lead W4 and W5) and state-detection voltage Vs1 and Vs2 because the distance of a plurality of touch points is different.Fig. 4 A is another multi-point touch synoptic diagram of the contact panel of Figure 1A.Fig. 4 B is the schematic equivalent circuit of Fig. 4 A.Please refer to 3A and Fig. 4 A, the distribution of resistance of Fig. 4 A can then do not giving unnecessary details at this, and the close together of touch points C4 and C5 be in touch points C2 and C3 with reference to shown in Fig. 3 A.Please refer to 4B, in the case, detected voltage Vw6 is 1.83V, and state-detection voltage Vs1 is 1.54V, and state-detection voltage Vs2 is 0.685V.According to above-mentioned, electric current I is (3.3-1.83)/300=4.89mA, and contact resistance value=(1.54-0.685)/4.89=174.8 Ω.
Hence one can see that, when a plurality of touch points the closer to the time, the contact resistance value that is calculated can be high more.Therefore, under the situation of multi-point touch, when contact resistance value greater than previous contact resistance value, represent a plurality of touch points for close mutually; Otherwise, when contact resistance value less than previous contact resistance value, represent a plurality of touch points for mutually away from.By this, can judge that use all is applied to the operating gesture of contact panel, and can carry out corresponding operation (for example dwindle or amplify) according to operating gesture.What deserves to be mentioned is that magnitude of voltage of being mentioned in the aforementioned content and resistance value only are the usefulness that illustrates, is not in order to limit the present invention.
In sum, the electric resistance touch-control panel of the embodiment of the invention and driving method thereof can structurally form the electric resistance touch-control panel of six line formulas.And, see through detecting device and obtain first and second state-detection voltage, calculate a contact resistance value according to first and second state-detection voltmeter again.Judge that according to contact resistance value contact panel is in single-point contact or multi-point touch.Under the situation of multi-point touch, according to this contact resistance value and previous contact resistance value judge a plurality of touch points on the contact panel be approaching mutually or mutually away from.By this, electric resistance touch-control panel can be judged user's operating gesture, and can carry out corresponding operation according to operating gesture.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (9)
1. an electric resistance touch-control panel is characterized in that, described panel comprises:
One first substrate;
One first conductive layer is disposed on described first substrate, has one first different corner, one second corner, a third angle falls and one the 4th corner;
One first lead is disposed on described first substrate and is electrically connected described first corner;
One second lead is disposed on described first substrate and is electrically connected described second corner;
One privates is disposed on described first substrate and is electrically connected described third angle;
One privates are disposed on described first substrate and are electrically connected described the 4th corner;
One second substrate is parallel to described first substrate;
One second conductive layer is disposed on described second substrate, and towards described first conductive layer;
One the 5th lead is electrically connected a first side of described second conductive layer;
One the 6th lead is electrically connected a second side of described second conductive layer; And
One drive circuit is electrically connected described first lead, described second lead, described privates, described privates, described the 5th lead and described the 6th lead;
Wherein said electric resistance touch-control panel utilizes a driving method to drive, and described driving method comprises provides a system voltage to described the 6th lead, and provide a ground voltage to described second lead, wherein said system voltage is greater than described ground voltage; When described electric resistance touch-control panel was touched, described the 5th lead was exported one first state-detection voltage, and described privates are exported one second state-detection voltage; Calculate a contact resistance value according to described first state-detection voltage and the described second state-detection voltmeter, wherein said contact resistance value is (Vs1-Vs2)/I, wherein Vs1 is the described first state-detection voltage, Vs2 is the described second state-detection voltage, and I is the electric current of described the 6th lead of flowing through; Judge that according to described contact resistance value described electric resistance touch-control panel is in a single-point contact state or a multi-point touch state, wherein when described contact resistance value during greater than an impedance critical value, described electric resistance touch-control panel is in described single-point contact state, and when described contact resistance value was less than or equal to described impedance critical value, described electric resistance touch-control panel was in described multi-point touch state; And when described electric resistance touch-control panel is in described multi-point touch state, according to a described contact resistance value and a previous contact resistance value judge a plurality of touch points on described electric resistance touch-control panel be mutual close or mutually away from, be applied to the operating gesture of described electric resistance touch-control panel with judgement.
2. electric resistance touch-control panel as claimed in claim 1 is characterized in that described panel also comprises a plurality of conductive patterns, is arranged on described first substrate, is positioned at the periphery of described first conductive layer and directly contacts described first conductive layer.
3. electric resistance touch-control panel as claimed in claim 2 is characterized in that, the material of described conductive pattern is a silver.
4. electric resistance touch-control panel as claimed in claim 1 is characterized in that, described panel further comprises:
One first conductor bar is arranged at the described first side of described second conductive layer, in order to be electrically connected described second conductive layer and described the 5th lead; And
One second conductor bar is arranged at the described second side of described second conductive layer, in order to be electrically connected described second conductive layer and described the 6th lead.
5. electric resistance touch-control panel as claimed in claim 1 is characterized in that described second side is with respect to described first side.
6. electric resistance touch-control panel as claimed in claim 1 is characterized in that, described driving circuit comprises:
One first driver is electrically connected described first lead;
One second driver is electrically connected described second lead;
One the 3rd driver is electrically connected described privates;
One the 4th driver is electrically connected described privates;
One first switch has one first end, one second end, and described first end is electrically connected described privates;
One first detecting device is electrically connected described second end;
One second detecting device is electrically connected described the 5th lead;
One resistance, one end are electrically connected described the 6th lead;
One the 5th driver is electrically connected the other end of described resistance;
One second switch has one the 3rd end, one the 4th end, and described the 3rd end is electrically connected described the 6th lead; And
One the 3rd detecting device is electrically connected described the 4th end.
7. electric resistance touch-control panel as claimed in claim 1 is characterized in that, described driving method also comprises:
Provide described system voltage to described privates and described privates, and provide described ground voltage to described first lead and described second lead;
When described electric resistance touch-control panel was touched, described the 5th lead was exported one first and is axially detected voltage;
Provide described system voltage to described second lead and described privates, and provide described ground voltage to described first lead and described privates;
When described electric resistance touch-control panel was touched, described the 5th lead was exported one second and is axially detected voltage; And
When described electric resistance touch-control panel is in described single-point contact state, axially detects voltage according to described first and orient one first axial location, and axially detect voltage according to described second and orient one second axial location.
8. electric resistance touch-control panel as claimed in claim 1 is characterized in that, described impedance critical value is the weighted value of a default contact resistance value and a ratio.
9. electric resistance touch-control panel as claimed in claim 8 is characterized in that, the scope of described ratio is 0.3 ~ 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910254376 CN102103450B (en) | 2009-12-22 | 2009-12-22 | Resistance-type touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910254376 CN102103450B (en) | 2009-12-22 | 2009-12-22 | Resistance-type touch panel |
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| Publication Number | Publication Date |
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| CN102103450A CN102103450A (en) | 2011-06-22 |
| CN102103450B true CN102103450B (en) | 2013-07-31 |
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| CN 200910254376 Expired - Fee Related CN102103450B (en) | 2009-12-22 | 2009-12-22 | Resistance-type touch panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104182110B (en) * | 2014-09-12 | 2017-10-24 | 业成光电（深圳）有限公司 | Electric resistance touch-control panel |
| TWI714404B (en) * | 2019-12-25 | 2020-12-21 | 緯創資通股份有限公司 | Touch apparatus and determination method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122838A (en) * | 2006-08-13 | 2008-02-13 | 陈其良 | Active touch control panel display |
| CN101126969A (en) * | 2007-10-11 | 2008-02-20 | 友达光电股份有限公司 | Low coupling capacitor condenser type touch control board |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122838A (en) * | 2006-08-13 | 2008-02-13 | 陈其良 | Active touch control panel display |
| CN101126969A (en) * | 2007-10-11 | 2008-02-20 | 友达光电股份有限公司 | Low coupling capacitor condenser type touch control board |
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