CN101593068B - Resistive touch panel and detection method for its contact point type - Google Patents

Abstract

A resistive touch panel and a method for detecting a contact point pattern thereof are provided. The panel comprises a plurality of detection areas, wherein a first detection area is defined by a first electrode, a second electrode, a third electrode and a fourth electrode, the first electrode and the second electrode belong to a first direction electrode, and the third electrode and the fourth electrode belong to a second direction electrode. The method comprises the following steps: when the first detection area confirms that a contact point is generated, the first electrode is connected to a voltage source, and the fourth electrode is connected to a grounding end, so that the second electrode generates a first voltage and the third electrode generates a second voltage; when the difference between the first voltage and the second voltage is larger than the threshold value, the contact point is confirmed to belong to a first type contact point; and when the difference between the first voltage and the second voltage is smaller than the threshold value, the contact point is confirmed to belong to a second type contact point. The invention can quickly judge the type of the contact point or the contact points and can further divide the contact points into effective contact points and ineffective contact points.

Description

The detection method of electric resistance touch-control panel and types of contact points thereof

Technical field

The present invention relates to a kind of electric resistance touch-control panel and detection method thereof, and be particularly related to the detection method of a kind of electric resistance touch-control panel and types of contact points thereof.

Background technology

Along with the fast development of computer technology, contact panel also applies to mobile phone screen, computer screen, PDA(Personal Digital Assistant) screen widely.Basically, contact panel can be used as computer input device and is used for replacing mouse.Then general in the contact panel at present with the utilization of electric resistance touch-control panel.

Please refer to Figure 1A, it is shown to be the side view of known electric resistance touch-control panel.On the surface of clear glass (glass) substrate 100, form a plurality of strip indium tin oxidation (Indium Tin Oxide is called for short ITO) layer 102; Moreover, on the surface of a transparent membrane (film) 110, form a plurality of strip ITO layers 112; Wherein, the strip ITO layer on the transparent glass substrate 100 102 is orthogonal with the strip ITO layer 112 on the transparent membrane 110.Moreover strip ITO layer 102 on a plurality of transparent isolating points (spacer dot) 120 isolation transparent glass substrates and the strip ITO layer 112 on the transparent membrane 110 make it can not contact with each other.

When the user pushed transparent membrane (film) 110 with finger or pointer, the strip ITO layer 112 on the transparent membrane (film) 110 can distortion and is touched strip ITO layer 102 on the transparent glass substrate 100.And the control circuit (not shown) of contact panel can calculate the contacting points position that the user pushes.

Please refer to Figure 1B, it is shown to be known electric resistance touch-control panel vertical view.For instance, contact panel 10 around dispose four electrodes, a negative Y electrode Y-, a positive Y electrode Y+, a negative X electrode X-and a positive X electrode X+.Moreover the strip ITO layer 102 on the glass substrate presents the arrangement of vertical direction, and the two ends of all strip ITO layers 102 are connected to negative Y electrode Y-and positive Y electrode Y+ respectively; And the strip ITO layer 112 on the transparent membrane 110 presents the arrangement of horizontal direction, and the two ends of all strip ITO layers 112 are connected to a negative X electrode X-and a positive X electrode X+ respectively.Wherein, all strip ITO layers 102,112 can equivalence be resistance all.

Moreover control circuit 150 utilizes Y-line, Y+ line, X-line, X+ line distinctly to be connected to negative Y electrode Y-, positive Y electrode Y+, negative X electrode X-and positive X electrode X+.When the user produced contact point on contact panel 10, control circuit 150 can be learnt the position of contact point fast.

Please refer to Fig. 2 A, it is shown for detecting the synoptic diagram that whether produces contact point on the known electric resistance touch-control panel.At first, in order to learn whether the user has the contact contact panel, the control circuit (not shown) can be connected to a voltage source Vcc positive X electrode X+, earth terminal is connected to negative Y electrode Y-, to bear X electrode X-and be connected to control circuit in order to voltage Va to be provided, and, do not connect (open) positive Y electrode Y+.

Clearly, when the user did not push contact panel, strip ITO layer did not up and down contact.Therefore, control circuit can equal voltage vcc in the voltage Va that negative X electrode X-receives, and, representative does not have the user to push contact panel as yet yet.

When the user utilized pointer 140 to push contact panel, strip ITO layer up and down was contacted with contact point A.Therefore, control circuit detects negative X electrode X-and receives voltage less than Vcc

Also promptly, can determine that the user has pushed contact panel this moment.Contact resistance when wherein Rz is two strip ITO layer contacts.

Please refer to Fig. 2 B, it is shown to be the synoptic diagram that calculates the contact point horizontal level on the known electric resistance touch-control panel.After control circuit learnt that the user produces a contact point, control circuit can be proceeded the calculating of contacting points position.In order to learn the horizontal level of contact point, when control circuit detects generation contact point A, control circuit can carry out change action, one voltage source Vcc is connected to positive X electrode X+, earth terminal is connected to negative X electrode X-, positive Y electrode Y+ is connected to control circuit with reception voltage Vx, and, (open) negative Y electrode Y-do not connected.

Clearly, the voltage on the positive Y electrode Y+ is By Fig. 2 B as can be known, when contact point A can be high more the closer to right side voltage Vx; Otherwise, when contact point A can be low more the closer to left side voltage Vx.Therefore, control circuit can carry out Vx voltage analog-to-digital conversion (analog to digitalconversion) and the horizontal level of acquisition contact point.

In like manner, please refer to Fig. 2 C, it is shown to be the synoptic diagram that calculates the contact point upright position on the known electric resistance touch-control panel.In order to learn the upright position of contact point A, calculate the horizontal level of contact point A when control circuit after, control circuit can carry out change action once more, one voltage source Vcc is connected to positive Y electrode Y+, earth terminal is connected to negative Y electrode Y-, positive X electrode X+ is connected to control circuit presses Vy to receive, and, (open) negative X electrode X-do not connected.

Clearly, the voltage on the positive X electrode X+ is By Fig. 2 C as can be known, when contact point A the closer to the upper end, voltage Vy can be high more; Otherwise, when contact point A the closer to the lower end, voltage Vy can be low more.Therefore, control circuit can carry out Vy voltage analog-to-digital conversion (analog todigital conversion) and the upright position of acquisition contact point.

Clearly, above-mentioned contact panel is surrounded as a surveyed area by four electrodes (negative Y electrode, positive Y electrode, negative X electrode and positive X electrode).Moreover Fig. 2 A is used for judging whether this surveyed area has the generation contact point.When producing contact point, control circuit can be proceeded the step of Fig. 2 B and Fig. 2 C, in order to obtain the horizontal level and the upright position of contact point.Otherwise when not producing contact point, control circuit can continue in the generation of waiting for contact point.

Because above-mentioned electric resistance touch-control panel is the contact panel that belongs to analog, therefore, when the user simultaneously when contact panel produces a plurality of contact point, control circuit can't be correct detects a plurality of contact points and can calculate the contact point of an output error.For instance, please refer to Fig. 3, it is shown to be the synoptic diagram that produces a plurality of contact points on the known electric resistance touch-control panel.This surveyed area 160 is formed by four electrode (not shown) definition.When the user produces contact point A1 and contact point A2 in this surveyed area 160 simultaneously.Suppose the horizontal level of contact point A1 and upright position for (x1, y1) and the horizontal level of contact point A2 and upright position be (x2, y2), then control circuit can calculate the contact point A3 of mistake, wherein the horizontal level of A3 and upright position are

In order to detect a plurality of contact points on electric resistance touch-control panel, the structure of new electric resistance touch-control panel is developed.Please refer to Fig. 4 A, it is shown for detecting the electric resistance touch-control panel synoptic diagram of many contact points.Comprising four groups of (group) electrodes (X1+～X3+, X1～X3-, Y1+～Y4+, Y1-～Y4-).Moreover this electric resistance touch-control panel is only divided into three electrodes respectively with positive X group (X+group) and negative X group (X-group), is example and positive Y group (Y+group) is divided into four electrodes respectively with negative Y group (Y-group).And the number of distinguishing also can have any combination, is not limited to the combination shown in Fig. 4 A.

In Fig. 4 A, three electrodes of positive X group (X+group) are positive X one electrode X1+, positive X two electrode X2+ and positive X three electrode X3+; Three electrodes of negative X group (X-group) are negative X one electrode X1-, negative X two electrode X2-and negative X three electrode X3-; Four electrodes of positive Y group (Y+group) are positive Y one electrode Y1+, positive Y two electrode Y2+, positive Y three electrode Y3+ and positive Y four electrode Y4+; Four electrodes of negative Y group (Y-group) are negative Y one electrode Y1-, negative Y two electrode Y2-, negative Y three electrode Y3-and negative Y four electrode Y4-.Clearly, four groups of above-mentioned (group) electrodes can produce 12 surveyed areas.For instance, positive X one electrode X1+, negative X one electrode X1-, positive Y one electrode Y1+, negative Y one electrode Y1-can form surveyed area D11, and then the rest may be inferred for all the other.

Moreover multiplexed commutation circuit 230 is connected to all electrodes, and can optionally the X+ line be connected to part or all of electrode in the X+ group according to the control signal of control circuit 250; The X-line is connected to part or all of electrode in the X-group; The Y+ line is connected to part or all of electrode in the Y+ group; The Y-line is connected to part or all of electrode in the Y-group.

Below in detail introduction can detect the action of the contact panel of many contact points.Please refer to Fig. 4 B, its shown equivalent electrical circuit when detecting the contact point program.Produce contact point in order to learn whether the user has on contact panel 200, control circuit 250 control X+ lines are connected to whole electrode in the X+ group; The X-line is connected to whole electrode in the X-group; The Y+ line is connected to whole electrode in the Y+ group; The Y-line is connected to whole electrode in the Y-group.Moreover control circuit 250 can carry out the change action first time, and a voltage source Vcc is connected to the X+ line, and earth terminal is connected to the Y-line, with the signal of X-line as judging signal, and, do not connect (open) Y+ line.At this moment, control circuit 250 can detect whether All Ranges has the generation contact point on the contact panel 200.Its judgment mode is identical with Fig. 2 A, repeats no more.

For instance, after control circuit 250 learns that the user produces contact point (for example contact point B1), the multiplexed commutation circuit 230 of control signal may command on the control circuit 250 is connected to 12 surveyed areas with X-line, X+ line, Y-line, Y+ line in regular turn, and detects on 12 surveyed areas whether produce contact point.At last, shown in Fig. 4 C, on the surveyed area D31 that positive Y one electrode Y1+, negative Y one electrode Y1-, positive X three electrode X3+, negative X three electrode X3-are arranged in pairs or groups, can obtain contact point B1, and can calculate horizontal level and the upright position of contact point B1.Moreover the account form of contact point B1 position is identical with Fig. 2 C with Fig. 2 B, therefore repeats no more.

In like manner, as shown in Figure 5, when the user produced a plurality of contact points (for example contact point B1, B2, B3) simultaneously, control circuit 250 can learn that the user produces contact point.And at this moment, control circuit 250 also can't learn that the user produces single contact point or a plurality of contact point.

Then, the multiplexed commutation circuit 230 of the control signal may command on the control circuit 250 is connected to 12 surveyed areas in regular turn with X-line, X+ line, Y-line, Y+ line, and detects on 12 surveyed areas whether produce contact point.At last, can learn a contact point is respectively arranged on surveyed area D13, surveyed area D31, the surveyed area D33, and control circuit can calculate the position of contact point B2 among the surveyed area D13, the position of contact point B1 among the surveyed area D31, the position of contact point B3 among the surveyed area D34.

Under some particular condition, the user may produce a plurality of contact points accidentally, and the known control circuit that detects the contact panel of many contact points also can come out a plurality of touch point position calculation.Please refer to Fig. 6, when the user utilizes pointer 140 to operate, usually finger 130 or palm 135 can be placed on the contact panel 200.At this moment, control circuit can calculate a plurality of contact points, yet the contact point that palm and finger presses are produced not is effective contact point.

Summary of the invention

How on the contact panel that can detect many contact points, utilize control circuit to judge the kenel of contact point, and further utilize the kenel of contact point to decide effective contact point and non-effective contact point to be the problem that institute of the present invention desire solves.

The present invention proposes a kind of types of contact points detection method of electric resistance touch-control panel, comprise a plurality of surveyed areas on this electric resistance touch-control panel, and one first surveyed area in described a plurality of surveyed area is by one first electrode, one second electrode, one third electrode, one the 4th electrode defines and forms, this first electrode and this second electrode belong to a first direction electrode, this third electrode and the 4th electrode belong to a second direction electrode, this types of contact points detection method comprises the following steps: when this first surveyed area is confirmed to produce a contact point, this first electrode is connected to a voltage source, the 4th electrode is connected to an earth terminal, makes this second electrode can produce one first voltage and this third electrode can produce one second voltage; When the difference of this first voltage and this second voltage during, confirm that this contact point belongs to one first kenel contact point greater than one first threshold value; And, confirm that this contact point belongs to one second kenel contact point when the difference of this first voltage and this second voltage during less than this first threshold value.

The present invention also proposes a kind of types of contact points detection method of electric resistance touch-control panel, comprise a plurality of surveyed areas on this electric resistance touch-control panel, and one first surveyed area in described a plurality of surveyed area is by one first electrode, one second electrode, one third electrode, one the 4th electrode defines and forms, this first electrode and this second electrode belong to a first direction electrode, this third electrode and the 4th electrode belong to a second direction electrode, this types of contact points detection method comprises the following steps: when this first surveyed area is confirmed to produce a contact point, this third electrode is connected to a voltage source, the 4th electrode is connected to an earth terminal, and obtain a touch voltage of this contact point and a current value of this contact point of flowing through; This voltage source switched by this this third electrode be connected to this first electrode, and the 4th electrode is connected to this earth terminal, make this second electrode can produce one first voltage and this third electrode can produce one second voltage; Utilize this touch voltage, this current value, this first voltage and this second voltage to calculate a contact resistance value; When this contact resistance value is preset contact resistance value greater than one, confirm that this contact point belongs to one first kenel contact point; And, when this contact resistance value during, confirm that this contact point belongs to one second kenel contact point less than this default contact resistance value.

The present invention also proposes a kind of electric resistance touch-control panel, comprising: a first direction first electrode group comprises the m electrode; One first direction, the second electrode group comprises the m electrode; One second direction, the first electrode group comprises n electrode; One second direction, the second electrode group comprises n electrode, and wherein 2m+2n electrode can separate this electric resistance touch-control panel and be m * n surveyed area; One multiplexed commutation circuit is connected to all 2m+2n electrode; And a control circuit, when one first surveyed area in described a plurality of surveyed areas is confirmed to produce a contact point, can judge that this contact point is one first kenel contact point or one second kenel contact point; Wherein, this first surveyed area is by one first electrode, one second electrode, one third electrode, one the 4th electrode defines and forms, this first electrode belongs to this first direction first electrode group, this second electrode belongs to this first direction second electrode group, this third electrode belongs to this second direction first electrode group, the 4th electrode belongs to this second direction second electrode group, when this first surveyed area is confirmed to produce a contact point, this first electrode is connected to a voltage source, the 4th electrode is connected to an earth terminal, makes this second electrode can produce one first voltage and this third electrode can produce one second voltage; When the difference of this first voltage and this second voltage during, confirm that this contact point belongs to this first kenel contact point greater than a threshold value; And, when the difference of this first voltage and this second voltage during, confirm that this contact point belongs to this second kenel contact point less than this threshold value.

The invention has the advantages that provides a kind of electric resistance touch-control panel and types of contact points detection method thereof.When producing contact point in one or more surveyed areas, can judge the kenel of this contact point or described a plurality of contact points apace.When occurring the contact point of different kenels simultaneously on the electric resistance touch-control panel, can further described a plurality of contact point zones be divided into effective contact point and non-effective contact point.

In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and explanation, be not to be used for the present invention is limited.

Description of drawings

Figure 1A is shown to be the side view of known electric resistance touch-control panel.

Figure 1B is shown to be known electric resistance touch-control panel vertical view.

Fig. 2 A is shown for detecting the synoptic diagram that whether produces contact point on the known electric resistance touch-control panel.

Fig. 2 B is shown to be the synoptic diagram that calculates the contact point horizontal level on the known electric resistance touch-control panel.

Fig. 2 C is shown to be the synoptic diagram that calculates the contact point upright position on the known electric resistance touch-control panel.

Shown in Figure 3ly go out for producing the synoptic diagram of a plurality of contact points on the known electric resistance touch-control panel.

Fig. 4 A is shown for detecting the electric resistance touch-control panel synoptic diagram of many contact points.

The shown equivalent electrical circuit when detecting the contact point program of Fig. 4 B and Fig. 4 C.

Shown in Figure 5ly go out for detect the synoptic diagram of a plurality of contact points at electric resistance touch-control panel.

Shown in Figure 6ly go out to be user's operation chart on contact panel.

Fig. 7 A is shown for utilizing finger to form the synoptic diagram of contact point.

Fig. 7 B is shown for utilizing pointer to form the synoptic diagram of contact point.

Shown in Figure 8ly go out for detecting the electric resistance touch-control panel synoptic diagram of many contact points.

Fig. 9 A is shown to be a surveyed area on the contact panel.

Fig. 9 B is shown to be a surveyed area on the contact panel.

Description of reference numerals in the above-mentioned accompanying drawing is as follows:

10 contact panels

100 transparent glass substrates, 102 ITO layers

110 transparent membranes, 112 ITO layers

120 transparent isolating points 130 fingers

140 pointer

150 control circuits, 160 surveyed areas

200 contact panels, 230 multiplexed commutation circuits

250 control circuits

800 contact panels, 830 multiplexed commutation circuits

850 control circuits, 910 first electrodes

912 second electrodes, 920 third electrodes

922 the 4th electrodes

Embodiment

Please refer to Fig. 7 A, it is shown for utilizing finger to form the synoptic diagram of contact point.When utilizing finger 130 to press,, therefore, can make that strip ITO layer 112,102 contact area are bigger up and down because contact area is bigger by contact panel; In like manner, the contact point that utilizes palm (palm) to produce can make that too strip ITO layer 112,122 contact area are bigger up and down.Moreover, please refer to Fig. 7 B, it is shown for utilizing pointer 140 to form the synoptic diagram of contact point.Because the nib area of pointer is little, when therefore utilizing pointer to press by contact panel, strip ITO layer contact area can be less up and down.And the present invention promptly utilizes this characteristic to judge that contact point is the contact point of first kenel or the contact point of second kenel, and wherein, the contact point of first kenel is the small size contact point, for example pointer contact point, sticker contact point, nib contact point; The contact point of second kenel is the large tracts of land contact point, for example points contact point, palm contact point.

Please refer to Fig. 8, it is shown for detecting the electric resistance touch-control panel synoptic diagram of many contact points.Comprising four groups of (group) electrodes: the directions X first electrode group (X1+～Xm+), the directions X second electrode group (X1-～Xm-), the Y direction first electrode group (Y1+～Yn+), the Y direction second electrode group (Y1-～Yn-).Therefore, whole electric resistance touch-control panel 800 can be divided into m * n surveyed area.

Moreover multiplexed commutation circuit 830 is connected to all electrodes, and can optionally the X+ line be connected to part or all of electrode in the X+ group according to the control signal of control circuit 850; The X-line is connected to part or all of electrode in the X-group; The Y+ line is connected to part or all of electrode in the Y+ group; The Y-line is connected to part or all of electrode in the Y-group.

At first, carry out (I) and confirm that contact point produces step.Also promptly, produce contact point in order to learn whether the user has on contact panel 800, control circuit 850 control X+ lines are connected to whole electrode in the X+ group; The X-line is connected to whole electrode in the X-group; The Y+ line is connected to whole electrode in the Y+ group; The Y-line is connected to whole electrode in the Y-group.Moreover control circuit 830 can carry out the change action first time, and a voltage source Vcc is connected to the X+ line, and earth terminal is connected to the Y-line, with the signal of X-line as judging signal, and, do not connect (open) Y+ line.At this moment, control circuit 850 can learn to detect whether All Ranges has the generation contact point on the contact panel 800 according to the variation of judging signal.

After control circuit 850 learns that the user produces contact point, promptly must carry out (II) contact point and look for step.When the execution contact point was looked for step, the multiplexed commutation circuit 830 of the control signal may command on the control circuit 850 was connected to m * n surveyed area in regular turn, and detects on m * n surveyed area whether produce contact point.

When having one or more surveyed areas to confirm to have point of contact on m * n the surveyed area, control circuit 850 can calculate the horizontal level and the upright position of check point on the surveyed area that has point of contact.Moreover, and the account form of contacting points position is identical with Fig. 2 C with Fig. 2 B, therefore repeats no more.

According to embodiments of the invention, control circuit 850 must be carried out (III) again and judge the types of contact points step.Because the contact area of contact point big more (for example forming contact point with finger or palm), strip ITO layer contact area is bigger up and down, so contact resistance Rz can be less; Otherwise, the contact area of contact point more little (for example forming contact point) with pointer, strip ITO layer contact area is less up and down, so contact resistance (Rz) can be bigger.

Please refer to Fig. 9 A, it is shown to be a surveyed area on the contact panel.This surveyed area by first electrode 910, second electrode 912, third electrode 920, the 4th electrode 922 is defined forms.First electrode 910 and second electrode 912 belong to first direction electrode (for example directions X+electrode and-electrode); Third electrode 920 and the 4th electrode 922 belong to second direction electrode (for example Y direction+electrode and-electrode).Moreover this surveyed area 900 has confirmed to produce a contact point C1.According to the first embodiment of the present invention, in order to judge the kenel of contact point C1, control circuit can be connected to first electrode with a voltage source Vcc, earth terminal is connected to the 4th electrode, second electrode is connected to control circuit so that one first voltage V1 to be provided, and, third electrode is connected to control circuit so that one second voltage V2 to be provided.

And the kenel of contact point C1 is promptly decided by the first voltage V1 and the second voltage V2.By Fig. 9 A as can be known, when the contact area of contact point was big more, Rz was more little for contact resistance, and therefore, the first voltage V1 approaches the second voltage V2, also is | V1-V2|＜Vth1.Otherwise, when the contact area of contact point more hour, contact resistance Rz is big more, therefore, the first voltage V1 becomes greatly with the second voltage V2 gap, also is | V1-V2|＞Vth1.And Vth1 is predefined first threshold value (threshold voltage).

By the description of first embodiment as can be known, when | V1-V2|＞Vth1, can determine that contact point C1 is the contact point of first kenel, for example the pointer contact point of small area of contact, sticker contact point, nib contact point; Otherwise, when | V1-V2|＜Vth1, can determine that contact point C1 is the contact point of second kenel, for example large-area finger contact point, palm contact point.

Perhaps, the present invention also can directly calculate the numerical value of contact resistance Rz, and judge the kenel of contact point according to the size of contact resistance Rz after obtain the first voltage V1 and the second voltage V2.For instance, when calculating the position of second direction, third electrode 920 is connected to voltage source Vcc, and the 4th electrode 922 is connected to earth terminal.Therefore, can learn that the voltage on the contact point C1 is

And the position that can learn first direction by the numerical value of Vc1.Moreover, by Fig. 9 A as can be known,

And

Also promptly, control circuit can obtain Vc1, V1, the magnitude of voltage of V2.And according to following formula:

$\mathrm{Vc}1(\frac{V1}{V2}-1)=\left(\frac{R4}{R3+R4}\mathrm{Vcc}\right)(\frac{R4+\mathrm{Rz}}{R4}-1)=\left(\frac{R4}{R3+R4}\mathrm{Vcc}\right)\left(\frac{\mathrm{Rz}}{R4}\right)=\mathrm{Rz}\left(\frac{\mathrm{Vcc}}{R3+R4}\right)$

Can very clearly learn,

One constant, and

During for the calculating second direction, voltage source flow to the electric current of earth terminal.Therefore, contact resistance Rz can be derived.

Therefore, the present invention also can be behind the contact resistance Rz that calculates, with a default contact resistance Rz0 relatively, as the contact resistance Rz that calculates during greater than default contact resistance Rz0, this contact point C1 is the first kenel contact point; Otherwise as the contact resistance Rz that calculates during less than default contact resistance Rz0, this contact point C1 is the second kenel contact point.

Please refer to Fig. 9 B, it is shown to be a surveyed area on the contact panel.This surveyed area by first electrode 910, second electrode 912, third electrode 920, the 4th electrode 922 is defined forms.First electrode 910 and second electrode 912 belong to first direction electrode (for example directions X+electrode and-electrode); Third electrode 920 and the 4th electrode 922 belong to second direction electrode (for example Y direction+electrode and-electrode).Moreover this surveyed area has confirmed to produce a contact point C2.According to embodiments of the invention, in order to judge the kenel of contact point C2, control circuit can be connected to first electrode with a voltage source Vcc, earth terminal is connected to second electrode, third electrode is connected to control circuit so that a tertiary voltage V3 to be provided, and, the 4th electrode is connected to control circuit so that one the 4th voltage V4 to be provided.

And the kenel of contact point C2 is promptly decided by tertiary voltage V3 and the 4th voltage V4.By Fig. 9 B as can be known, R1, Rx, R2 form a strip ITO layer.Therefore, when the contact area of contact point was big more, the shared part of resistance R 2 was long more, and also, resistance R 2 is big more.Therefore, tertiary voltage V3 with big in the 4th voltage V4 gap also is | V3-V4|＞Vth2.Otherwise, when the contact area of contact point more hour, resistance R 2 is more little, therefore, tertiary voltage V3 and the 4th voltage V4 are approaching, also are | V3-V4|＜Vth2.And Vth2 is predefined second threshold value (threshold voltage).

By the description of second embodiment as can be known, when | V3-V4|＜Vth2, can determine that contact point C2 is the contact point of first kenel, for example the pointer contact point of small area of contact, sticker contact point, nib contact point; Otherwise, when | V3-V4|＞Vth2, can determine that contact point C2 is the contact point of second kenel, for example large-area finger contact point, palm contact point.

According to embodiments of the invention, the invention has the advantages that provides a kind of electric resistance touch-control panel and types of contact points detection method thereof.When producing contact point in one or more surveyed areas, can judge the kenel of this contact point or described a plurality of contact points apace.When occurring the contact point of different kenels simultaneously on the electric resistance touch-control panel, can further described a plurality of contact point zones be divided into effective contact point and non-effective contact point.

In sum; though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; can do various changes and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.

Claims (17)

1. A contact point type detection method of a resistive touch panel, comprising a plurality of detection areas on the resistive touch panel, and a first detection area in the plurality of detection areas is composed of a first electrode, a Defined by a second electrode, a third electrode, and a fourth electrode, the first electrode and the second electrode belong to a first direction electrode, the third electrode and the fourth electrode belong to a second direction electrode, The contact point type detection method includes the following steps: When it is confirmed that a contact point is generated in the first detection area, the first electrode is connected to a voltage source, and the fourth electrode is connected to a ground terminal, so that the second electrode can generate a first voltage and the third electrode The electrodes can generate a second voltage; When the difference between the first voltage and the second voltage is greater than a first threshold value, confirming that the contact point belongs to a first type contact point; and When the difference between the first voltage and the second voltage is less than the first threshold value, it is confirmed that the contact point belongs to a second type contact point. 2. The contact point type detection method according to claim 1, wherein the first type of contact point is a small-area contact point, and the second type of contact point is a large-area contact point. 3. The touch point type detection method as claimed in claim 1, wherein the first type of touch point is a stylus touch point; and the second type of touch point is a finger touch point or a palm touch point point. 4. The touch point type detection method as claimed in claim 1, wherein the first type of touch point is a nib touch point; and the second type of touch point is a finger touch point or a palm touch point. 5. The touch point type detection method as claimed in claim 1, wherein the first type of touch point is a pointed object point of contact; and the second type of touch point is a finger point of contact or a palm point of contact . 6. The contact point type detection method according to claim 1, wherein the first direction electrode is in the X direction and the first electrode and the second electrode correspond to each other, the second direction electrode is a Y direction electrode and the The third electrode corresponds to the fourth electrode. 7. A contact point type detection method for a resistive touch panel, the resistive touch panel includes a plurality of detection areas, and a first detection area in the plurality of detection areas is composed of a first electrode, a Defined by a second electrode, a third electrode, and a fourth electrode, the first electrode and the second electrode belong to a first direction electrode, the third electrode and the fourth electrode belong to a second direction electrode, The contact point type detection method includes the following steps: When a contact point is confirmed in the first detection area, connect the third electrode to a voltage source, connect the fourth electrode to a ground terminal, obtain a contact voltage at the contact point, and flow through the contact point A current value of a point; The voltage source is switchably connected from the third electrode to the first electrode, and the fourth electrode is connected to the ground terminal, so that the second electrode can generate a first voltage and the third electrode can generate a first voltage. Two voltages; calculating a contact resistance value by using the contact voltage, the current value, the first voltage and the second voltage; When the contact resistance value is greater than a preset contact resistance value, confirm that the contact point belongs to a first type contact point; and When the contact resistance value is less than the preset contact resistance value, it is confirmed that the contact point belongs to a second type contact point. 8 . The contact point type detection method according to claim 7 , wherein the first type of contact point is a small-area contact point, and the second type of contact point is a large-area contact point. 9. The touch point type detection method as claimed in claim 7, wherein the first type of touch point is a stylus touch point; and the second type of touch point is a finger touch point or a palm touch point point. 10. The contact point type detection method according to claim 7, wherein the first type of contact point is a pen tip contact point; and the second type of contact point is a finger contact point or a palm contact point. 11. The touch point type detection method as claimed in claim 7, wherein the first type of touch point is a pointed object point of contact; and the second type of touch point is a finger point of contact or a palm point of contact . 12. The contact point type detection method according to claim 7, wherein the first direction electrode is an X direction and the first electrode corresponds to the second electrode, the second direction electrode is a Y direction electrode and the The third electrode corresponds to the fourth electrode. 13. A resistive touch panel comprising: A first electrode group in the first direction, including m electrodes; A second electrode group in the first direction, including m electrodes; A first electrode group in the second direction, including n electrodes; A second electrode group in the second direction, including n electrodes, wherein 2m+2n electrodes can divide the resistive touch panel into m×n detection areas; a multiplexing switching circuit connected to all 2m+2n electrodes; and A control circuit, when a first detection area in the detection area confirms that a contact point is generated, it can judge that the contact point is a first type contact point or a second type contact point; Wherein, the first detection area is defined by a first electrode, a second electrode, a third electrode, and a fourth electrode, the first electrode belongs to the first electrode group in the first direction, and the second electrode Belonging to the second electrode group in the first direction, the third electrode belonging to the first electrode group in the second direction, and the fourth electrode belonging to the second electrode group in the second direction, when a contact point is confirmed in the first detection area , connect the first electrode to a voltage source, connect the fourth electrode to a ground terminal, so that the second electrode can generate a first voltage and the third electrode can generate a second voltage; when the first When the difference between the voltage and the second voltage is greater than a threshold value, confirm that the contact point belongs to the first type contact point; and, when the difference between the first voltage and the second voltage is less than the threshold value, confirm that The contact point belongs to the second type of contact point. 14. The resistive touch panel as claimed in claim 13, wherein the first type of contact is a small-area contact, and the second type of contact is a large-area contact. 15. The resistive touch panel as claimed in claim 13, wherein the first type of contact point is a stylus contact point; and the second type of contact point is a finger contact point or a palm contact point . 16 . The resistive touch panel as claimed in claim 13 , wherein the first type of contact point is a pen tip contact point; and the second type of contact point is a finger contact point or a palm contact point. 17. The resistive touch panel as claimed in claim 13, wherein the first type of contact point is a pointed object point; and the second type of contact point is a finger point of contact or a palm point of contact.

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