CN108628497B - Capacitive touch panel, compensation method thereof and display device - Google Patents
Capacitive touch panel, compensation method thereof and display device Download PDFInfo
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- CN108628497B CN108628497B CN201810419649.5A CN201810419649A CN108628497B CN 108628497 B CN108628497 B CN 108628497B CN 201810419649 A CN201810419649 A CN 201810419649A CN 108628497 B CN108628497 B CN 108628497B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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Abstract
The application relates to a capacitive touch panel, a compensation method thereof and a display device. The capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit; the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed mode with the first touch electrode strips along a second direction and are mutually insulated, and the first direction is crossed with the second direction. The special-shaped crossed electrodes in the first touch electrode strips are connected with the corresponding resistance compensation units in parallel, and the special-shaped crossed electrodes in the second touch electrode strips are connected with the corresponding resistance compensation units in parallel. The resistance compensation units are respectively connected in parallel to the irregular-shaped crossed electrodes of the first touch electrode strip and the second touch electrode strip, so that the resistance value of the irregular-shaped crossed electrodes is reduced, the corresponding touch signals are enhanced, and the touch sensing sensitivity can be improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a capacitive touch panel, a compensation method thereof, and a display device.
Background
With the development of touch technology, touch panels are widely applied to smart electronic devices such as mobile phones, televisions, wearable devices, public query devices, and the like. Touch panels can be classified into capacitive, resistive, and optical types. The capacitive touch panel generally includes a touch driving electrode strip and a touch sensing electrode strip which are arranged in a crossing manner, and a crossing electrode is formed at the crossing of the touch driving electrode and the touch sensing electrode. When the finger of the user contacts the capacitive touch panel, the capacitance value of the contacted electrode is reduced, and the specific position of the touch point can be determined by detecting the touch signal corresponding to the capacitance value.
The capacitive touch panel applied to the full-face screen generally needs to be grooved or chamfered at the edge to dig a part, for example, a notch formed by the groove is used for installing a camera. If the capacitive touch panel is grooved or chamfered, partial electrodes of the touch driving electrode strips and the touch sensing electrode strips are lost, if crossed electrodes in the touch driving electrode strips and the touch sensing electrode strips are lost, the crossed electrodes are deformed into deformed crossed electrodes, touch signals corresponding to the deformed crossed electrodes are weakened relative to touch signals corresponding to regular crossed electrodes without electrode loss, and the touch sensing sensitivity of the capacitive touch panel is low.
Disclosure of Invention
Accordingly, it is desirable to provide a capacitive touch panel, a compensation method thereof and a display device, which can improve the touch sensitivity, in order to solve the problem of low touch sensitivity.
A capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit;
the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed manner with the first touch electrode strips along a second direction and are insulated from each other, the first direction is crossed with the second direction, the special-shaped crossed electrodes in the first touch electrode strips are connected with the corresponding resistance compensation units in parallel, and the special-shaped crossed electrodes of the second touch electrode strips are connected with the corresponding resistance compensation units in parallel; the special-shaped cross electrodes are cross electrodes with electrode loss.
A display device comprises a display panel and the capacitive touch panel, wherein the display panel and the capacitive touch panel are arranged in a laminated mode; the capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit;
the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed manner with the first touch electrode strips along a second direction and are insulated from each other, the first direction is crossed with the second direction, the special-shaped crossed electrodes in the first touch electrode strips are connected with the corresponding resistance compensation units in parallel, and the special-shaped crossed electrodes in the second touch electrode strips are connected with the corresponding resistance compensation units in parallel; the special-shaped cross electrodes are cross electrodes with electrode loss.
The electrode loss of the irregular cross electrodes can cause the resistance value of the irregular cross electrodes to be increased, and the touch signals corresponding to the irregular cross electrodes are weakened relative to the touch signals corresponding to the regular cross electrodes, so that the touch sensing sensitivity of the capacitive touch panel is low. In the capacitive touch panel and the display device, the first touch electrode strips and the second touch electrode strips are distributed in a crossed manner, and the resistance compensation units are respectively connected in parallel to the special-shaped crossed electrodes of the first touch electrode strips and the special-shaped crossed electrodes of the second touch electrode strips, so that the resistance values of the special-shaped crossed electrodes of the first touch electrode strips and the special-shaped crossed electrodes of the second touch electrode strips are reduced, the corresponding touch signals are enhanced, and the touch sensing sensitivity can be improved.
A compensation method of a capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit; the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a cross mode with the first touch electrode strips along a second direction and are insulated from each other, and the first direction and the second direction are crossed, wherein the method comprises the following steps:
respectively positioning the special-shaped crossed electrodes in the first touch electrode strip and the second touch electrode strip;
and respectively connecting the special-shaped crossed electrodes in the first touch electrode strip and the special-shaped crossed electrodes in the second touch electrode strip in parallel with the corresponding resistance compensation units.
According to the compensation method of the capacitive touch panel, the special-shaped crossed electrodes of the first touch electrode strip and the second touch electrode strip respectively correspond to the parallel resistance compensation units, so that the resistance value of the special-shaped crossed electrodes is reduced, the corresponding touch signals are enhanced, and the touch induction sensitivity of the capacitive touch panel can be improved.
Drawings
Fig. 1 is a schematic partial structure diagram of a capacitive touch panel in an embodiment;
fig. 2 is a schematic structural diagram of a capacitive touch panel in another embodiment;
FIG. 3 is a schematic diagram illustrating an exemplary embodiment of a slotting design for arc line cutting of a capacitive touch panel;
fig. 4 is a schematic diagram illustrating a design of a notch cut by an arc line of a capacitive touch panel in another embodiment;
fig. 5 is a schematic view illustrating a design of a slot in which a straight line is connected between two circular arc lines of the capacitive touch panel in one embodiment;
FIG. 6 is a schematic diagram illustrating a rectangular slot design of a capacitive touch panel according to an embodiment;
FIG. 7 is a schematic diagram illustrating a rectangular slot design of a capacitive touch panel according to another embodiment;
FIG. 8 is a flowchart illustrating a compensation method for a capacitive touch panel according to an embodiment;
fig. 9 is a schematic flow chart illustrating parallel connection of the irregularly-shaped intersecting electrodes of the first touch electrode strip and the second touch electrode strip with a corresponding one of the resistance compensation units according to an embodiment;
FIG. 10 is a schematic view of the arc of the grooved area tangent to the crossing electrodes;
FIG. 11 is a schematic diagram of intersection of a circular arc line of a grooved area with line segments 1 and 2 of crossing electrodes;
FIG. 12 is a schematic diagram of intersection of a circular arc line of a grooved area with line segments 1 and 3 of crossing electrodes;
FIG. 13 is a schematic diagram of intersection of a circular arc line of a grooved area with line segments 3 and 4 of crossing electrodes;
fig. 14 is a schematic diagram of intersection of the circular arc line of the grooved area with the line segments 2 and 4 of the intersecting electrodes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, a capacitive touch panel is provided, and referring to fig. 1, the capacitive touch panel includes a first touch electrode strip 110, a second touch electrode strip 120, and a resistance compensation unit (not shown). The first touch electrode stripes 110 are arranged along a first direction, the second touch electrode stripes 120 are arranged to cross the first touch electrode stripes 110 along a second direction and are insulated from each other, and the first direction and the second direction are crossed. The irregular-shaped crossed electrodes 11 in the first touch electrode strip 110 are connected in parallel with the corresponding resistance compensation units, and the irregular-shaped crossed electrodes 11 in the second touch electrode strip 120 are connected in parallel with the corresponding resistance compensation units. Wherein, the special-shaped crossed electrode 11 is a crossed electrode with electrode loss.
The capacitive touch panel generally includes a touch driving electrode and a touch sensing electrode arranged in a crossing manner. The first touch electrode strips 110 and the second touch electrode strips 120 are respectively one of touch sensing electrode strips and touch driving electrode strips and are different from each other, that is, the first touch electrode strips 110 can be touch sensing electrode strips, and the second touch electrode strips 120 are touch driving electrode strips; the first touch electrode strips 110 may also be touch driving electrode strips, and the second touch electrode strips 120 may also be touch sensing electrode strips. The first touch electrode strips 110 are arranged along a first direction, specifically, the length of the first touch electrode strips 110 extends along the first direction; the second touch electrode stripes 120 are disposed along a second direction crossing the first direction, and specifically, the lengths of the second touch electrode stripes 120 extend along the second direction. Specifically, the first direction and the second direction are perpendicular to each other. For example, as shown in fig. 1, when the horizontal direction is the first direction and the vertical direction is the second direction, a row in the horizontal direction is a first touch electrode bar 110, and a column in the vertical direction is a second touch electrode bar 120. It is understood that in other embodiments, the first direction and the second direction may not be perpendicular.
When the capacitive touch panel is grooved or chamfered, grooves or rounded corners are correspondingly formed on the grooved or chamfered touch driving electrode bars and/or touch sensing electrode bars, which causes the touch driving electrode bars and/or touch sensing electrode bars to be deformed, so that a part of the crossing electrodes in the first touch electrode bars 110 and the second touch electrode bars 120 are deformed. As shown in fig. 1, the crossed electrode with electrode missing is a special-shaped crossed electrode 11; the interdigitated electrodes without electrode deletion are regular interdigitated electrodes 12. The area of the irregularly-shaped intersecting electrode 11 is smaller than that of the regularly-intersecting electrode 12 due to electrode missing caused by grooving or chamfering.
The number of the first touch electrode strips 110 and the second touch electrode strips 120 may be multiple, and correspondingly, the number of the special-shaped crossed electrodes 11 and the number of the resistance compensation units are respectively multiple and equal. Each special-shaped crossed electrode 11 is respectively connected with a resistance compensation unit corresponding to the special-shaped crossed electrode in parallel, specifically, one special-shaped crossed electrode 11 is connected with one resistance compensation unit in parallel, and the resistance compensation units connected with different special-shaped crossed electrodes 11 in parallel are different.
Because the electrode of the special-shaped crossed electrode 11 is lost and the area is lack due to slotting or chamfering, the area which is lacked in the special-shaped crossed electrode 11 corresponds to the resistance value, and the resistance value corresponding to the actual area is in a parallel relation, namely, the relation is satisfied:
wherein R issResistance value, R, corresponding to the actual area of the irregularly-shaped intersecting electrode 11qResistance value, R, corresponding to the area missing in the irregularly shaped intersecting electrode 11zRepresenting the resistance corresponding to the total area of the regularly crossing electrodes 12. It can be seen that the electrode missing of the irregular-shaped cross electrode 11 may increase the resistance of the irregular-shaped cross electrode 11, and the touch signal corresponding to the irregular-shaped cross electrode 11 may be weakened relative to the touch signal corresponding to the regular cross electrode 12, so that the touch sensing sensitivity of the capacitive touch panel is low.
In the capacitive touch panel, the first touch electrode strips 110 and the second touch electrode strips 120 are distributed in a crossed manner, and the resistance compensation units are respectively connected in parallel to the irregular-shaped crossed electrodes 11 of the first touch electrode strips 110 and the second touch electrode strips 120, so that the resistance values of the irregular-shaped crossed electrodes 11 of the first touch electrode strips and the irregular-shaped crossed electrodes 11 of the second touch electrode strips are reduced, the corresponding touch signals are enhanced, and the touch sensing sensitivity can be improved.
Specifically, the first touch electrode strip 110 is an irregular touch sensing electrode strip or an irregular touch driving electrode strip containing the irregular crossed electrodes 11; correspondingly, the second touch electrode strip 120 is an irregular touch driving electrode strip or an irregular touch sensing electrode strip containing the irregular crossed electrodes 11. Referring to fig. 1 and 2, the capacitive touch driving panel further includes a regular touch sensing electrode strip 130 including regular crossing electrodes 12 and no irregular crossing electrodes 11 (i.e., none of the crossing electrodes in the regular touch sensing electrode strip 130 is missing), and a regular touch driving electrode strip 140 including regular crossing electrodes 12 and no irregular crossing electrodes 11 (i.e., none of the crossing electrodes in the regular touch driving electrode strip 140 is missing).
In one embodiment, the resistance of the resistance compensation unit is equal to the resistance corresponding to the missing area of the regularly crossing electrodes 12 of the first touch electrode strip 110 and the second touch electrode strip 120 compared to the irregularly crossing electrodes 11 connected in parallel.
The shapes of the touch sensing electrode strips and the touch driving electrode strips in the capacitive touch panel are generally the same, so that for a capacitive touch panel without grooves or chamfers, the areas of the cross electrodes formed by the first touch electrode strips 110 and the second touch electrode strips 120 in a cross manner on the plane corresponding to the capacitive touch panel are equal. Specifically, the areas of the irregularly-shaped intersecting electrodes 11 and the regular intersecting electrodes 12 are the areas of the irregularly-shaped intersecting electrodes 11 and the regular intersecting electrodes 12 on the plane corresponding to the capacitive touch panel. The special-shaped crossed electrode 11 causes electrode loss due to slotting or chamfering, and the area is smaller than that of the regular crossed electrode 12; wherein, the missing area of the irregularly-shaped intersecting electrode 11 compared with the regular intersecting electrode 12 is equal to the difference between the areas of the regular intersecting electrode 12 and the irregularly-shaped intersecting electrode 11.
By adopting the resistance compensation unit with the resistance value equal to the resistance value corresponding to the missing area of the corresponding parallel-connected special-shaped crossed electrode 11, the method comprises the following steps: r0＝RqWherein R is0Expressing the resistance value of the resistance compensation unit, so that the resistance value of the resistance compensation unit after being connected with the special-shaped crossed electrode 11 in parallel is equal to the resistance value of the regular crossed electrode 12; therefore, the resistance compensation of the special-shaped crossed electrode 11 is more accurate, the resistance difference between the special-shaped crossed electrode 11 and the regular crossed electrode 12 can be avoided while the resistance of the special-shaped crossed electrode 11 is reduced, the touch signal corresponding to the special-shaped crossed electrode 11 is more accurate, and the touch sensing sensitivity can be further improved.
In one embodiment, the resistance compensation unit includes a plurality of discrete resistors connected in series. Wherein the discrete resistor is a single discrete resistor. Through adopting a plurality of discrete resistors to establish ties, conveniently to whole resistance's regulation and selection after establishing ties, the structure flexibility is high. It is understood that in other embodiments, the resistance compensation unit may also include only a single resistor, and the resistance value of the single resistor is equal to the resistance value corresponding to the missing area of the parallel-connected special-shaped crossed electrode 11 compared with the regular crossed electrode 12.
In one embodiment, the discrete resistors are made of silver, aluminum, or ITO. Silver and aluminum are metal materials with good ductility, are used for manufacturing discrete resistors and have high plasticity. The ITO has high light transmittance and electric conductivity, is used for manufacturing resistors, and has good light transmittance effect and electric conductivity. It will be appreciated that in other embodiments, discrete resistors may be implemented using resistors made of other materials.
In one embodiment, the resistance compensation unit is disposed in a slotted region of the capacitive touch panel. The groove area is a groove area for grooving the capacitive touch panel to form a groove. By disposing the resistance compensation unit in the slotted region, the disposition position of the resistance compensation unit is staggered with the disposition positions of the first touch electrode strip 110 and the second touch electrode strip 120, and the sensing of the touch point is not affected.
Specifically, the resistance compensation unit may be disposed in a preset cutting precision region within the slotted region. The preset cutting precision area is a cutting range within which the theoretical cutting depth for grooving the capacitive touch panel is allowed to fluctuate due to a preset allowable error. The preset allowable error is specifically set according to actual needs, and the requirement that the normal working performance of the capacitive touch display screen cannot be influenced when cutting is carried out in a preset cutting precision area is met. The resistance compensation unit is arranged in the preset cutting precision area in the slotted area, so that the working performance of the capacitive touch panel is prevented from being influenced. For example, if the theoretical cutting depth is 5 cm and the predetermined allowable error is 1 cm, the predetermined cutting precision region is a region from 4 cm to 6 cm in depth. As shown in fig. 1 and 2, the area a is a preset cutting precision area in the grooving area. A resistance compensation unit may be disposed within the region a. It is understood that in other embodiments, the resistance compensation unit may be disposed at other positions.
In one embodiment, referring to fig. 2, the capacitive touch panel further includes an IC (Integrated Circuit) chip 160, and the first touch electrode strips 110 and the second touch electrode strips 120 are respectively connected to the IC chip 160. The IC chip 160 is used for receiving the touch signals corresponding to the irregular-shaped crossed electrodes 11 and the regular crossed electrodes 12 of the first touch electrode strip 110 and the second touch electrode strip 120, respectively, so as to identify the position of the touch point.
The groove shape of the slotted area of the capacitive touch panel can be various, and the slotted area can be located at the position of the capacitive touch panel. For example, the groove of the grooved area may be in a shape of arc line cutting, and the grooved area may be disposed in the middle of the top edge of the capacitive touch panel, as shown in fig. 1 and 2; the groove of the grooved area may be in a shape of arc line cutting, and the grooved area is disposed in the middle of one side edge of the capacitive touch panel, as shown in fig. 3, or in the vertex of the top edge of the capacitive touch panel, as shown in fig. 4; or the groove of the slotted area may be a pattern in which the middle of two circular arcs connects a straight line, and the slotted area may be disposed in the middle of the top edge of the capacitive touch panel, as shown in fig. 5, or may be disposed on one side edge of the capacitive touch panel; or the groove of the grooved area may be rectangular, and the grooved area may be disposed at the middle position of one side edge of the capacitive touch panel, as shown in fig. 6, or may be disposed at the vertex position of the top edge of the capacitive touch panel, as shown in fig. 7. Namely, the resistance compensation unit can be suitable for performing resistance compensation on capacitive touch panels with different groove shapes and different groove positions, so that the touch sensing sensitivity is improved.
In one embodiment, a compensation method for a capacitive touch panel is provided. The capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit; the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed mode with the first touch electrode strips along a second direction and are mutually insulated, and the first direction is crossed with the second direction. Referring to fig. 8, the compensation method of the capacitive touch panel includes the following steps:
s110: and respectively positioning the irregular crossed electrodes in the first touch electrode strip and the second touch electrode strip.
In the capacitive touch panel, the positions of the intersecting electrodes of the first touch electrode strip and the second touch electrode strip are known. When the capacitive touch panel is subjected to slotting or chamfering design, the positions of the slotting or chamfering, the depths of the slotting or chamfering and the positions of the cross electrodes can be determined according to requirements, and then the special-shaped cross electrodes are generated after slotting or chamfering. And respectively positioning the special-shaped crossed electrodes in the first touch electrode strip and the second touch electrode strip, specifically determining the positions of the special-shaped crossed electrodes. For example, the capacitive touch panel before being notched or chamfered may be compared with the notched or chamfered capacitive touch panel to locate the irregularly-shaped intersecting electrodes in the first touch electrode strip and the second touch electrode strip, or the irregularly-shaped intersecting electrodes may be directly determined through optical location detection.
S130: and respectively connecting the special-shaped crossed electrodes in the first touch electrode strip and the special-shaped crossed electrodes in the second touch electrode strip in parallel with the corresponding resistance compensation units.
Specifically, step S130 connects one specially-shaped cross electrode in parallel with one resistance compensation unit, and the resistance compensation units connected in parallel with different specially-shaped cross electrodes are different.
According to the compensation method of the capacitive touch panel, the special-shaped crossed electrodes of the first touch electrode strip and the second touch electrode strip respectively correspond to the parallel resistance compensation units, so that the resistance value of the special-shaped crossed electrodes is reduced, the corresponding touch signals are enhanced, and similarly, the touch induction sensitivity of the capacitive touch panel can be improved.
In one embodiment, referring to fig. 9, step S130 includes steps S131 to S133.
S131: and calculating the missing areas of the irregular-shaped crossed electrodes in the first touch electrode strip and the second touch electrode strip compared with the regular crossed electrodes of the first touch electrode strip and the second touch electrode strip respectively.
Wherein, the missing area of the irregular-shaped crossed electrode compared with the regular crossed electrode is equal to the difference between the areas of the regular crossed electrode and the irregular-shaped crossed electrode. The missing area can be calculated in various ways, for example, the total area of the regular intersecting electrodes can be known, and the missing area of the irregular intersecting electrodes can be obtained by detecting the actual area of the irregular intersecting electrodes and subtracting the actual area of the irregular intersecting electrodes from the total area of the regular intersecting electrodes. Alternatively, the missing area may be directly calculated from the graph.
S132: and calculating the resistance value corresponding to the missing area according to the missing area, the size of the corresponding special-shaped crossed electrode and the resistivity of the corresponding special-shaped crossed electrode.
The size of the special-shaped crossed electrode refers to the value of the special-shaped crossed electrode in the length direction for calculating the resistance value. Specifically, the resistance value corresponding to the missing area can be calculated according to the following formula:
Rq＝ρL/Sq；
wherein R isqRepresenting the resistance corresponding to the missing area, ρ representing the resistivity of the irregularly-shaped crossed electrode, L representing the size of the irregularly-shaped crossed electrode, SqRepresents the area of the deletion; ρ and L are fixed values, which can be known in advance.
S133: and the resistance compensation units with the resistance values equal to the resistance values corresponding to the missing areas are respectively adopted and connected in parallel with the specially-shaped crossed electrodes of the first touch electrode strips and the specially-shaped crossed electrodes of the second touch electrode strips which respectively correspond to the resistor compensation units.
The resistance value of the resistance compensation unit is equal to that of the regular crossed electrode after the resistance compensation unit is connected with the special-shaped crossed electrode in parallel by adopting the resistance compensation unit with the resistance value equal to that corresponding to the missing area of the special-shaped crossed electrode which is connected with the special-shaped crossed electrode in parallel; therefore, the resistance compensation of the special-shaped crossed electrodes is more accurate, the resistance difference between the special-shaped crossed electrodes and the regular crossed electrodes can be avoided while the resistance of the special-shaped crossed electrodes is reduced, the touch signals corresponding to the special-shaped crossed electrodes are more accurate, and the touch sensing sensitivity can be further improved.
Specifically, the following description will be given of the idea of calculating the missing area and a specific method for calculating the missing area under several conditions, taking a groove cut by a circular arc line as an example:
in the capacitive touch panel, referring to fig. 1, the crossing electrodes of the touch sensing electrode strip and the touch driving electrode strip are equidistant from each other, and the gaps are also equidistant from each other, which means that the whole capacitive touch panel array structure is obtained after one crossing electrode is periodically translated. The width of each crossed electrode in the horizontal X direction is w (shown in figure 10), the gap of each crossed electrode in the horizontal X direction is v, the width of each crossed electrode in the vertical Y direction is h (shown in figure 10), and the gap of each crossed electrode in the vertical Y direction is n; referring to fig. 10, a rectangular coordinate system is established with the center point of the slot defined as the origin O and the radius R, and the center point of the crossing electrode is G (Xg, Yg). Where the values of w, v, h, n, Xg and Yg are known in advance.
The diagonal length of the cross electrode is
The expression for the circle of the grooved area is:
X2+Y2＝R2formula 1;
distance length from coordinate origin O to G
Og>When R + ag is generated, the crossed electrodes are not lost, and resistance compensation is not needed to be considered; og<When R + ag, the crossing electrode will lose some area. Og<Let edge AB be segment 1, edge AC be segment 2, edge CQ be segment 3, and edge BQ be segment 4:
the expression for segment 1(AB) is: x ═ Xg-w/2, (Yg-h/2< Y < Yg + h/2);
the expression for line segment 2(AC) is: y ═ Yg-h/2, (Xg-w/2< X < Xg + w/2);
the expression for line segment 3(CQ) is: x ═ Xg + w/2, (Yg-h/2< Y < Yg + h/2);
the expression for line segment 4(BQ) is: y ═ Yg + h/2, (Xg-w/2< X < Xg + w/2);
judging that the arc line of the slotted area is intersected with the edge line segment of the crossed electrode, only substituting the expressions of the line segment 1, the line segment 2, the line segment 3 and the line segment 4 into the expression of the circle of the slotted area, if one of the two corresponding solutions is in the limited range of the corresponding line segment, intersecting the line segment and the circle, otherwise, not intersecting.
Example (c): let the expression for segment 1: substituting X-Xg-w/2 into formula 1, and obtaining two solutions of Y1 and Y2; line segment 1 is bounded by: yg-h/2< Y < Yg + h/2. If Yg-h/2< Y1< Yg + h/2 or Yg-h/2< Y2< Yg + h/2, namely only one solution is satisfied, the line segment 1 intersects with the circle, and similarly, whether the line segment 2, the line segment 3 and the line segment 4 intersect with the circle can be judged.
In combination with practical situations, several intersection modes occur when the intersection electrode in one quadrant of the rectangular coordinate system intersects with the circle: scheme A: the line segment 1 and the line segment 2 are intersected with the circle; scheme B: the line segment 1 and the line segment 3 are intersected with the circle; scheme C: the line segments 3 and 4 intersect with the circle; scheme D: the line segments 2 and 4 intersect the circle. Several schemes are described below in terms of calculation.
Scheme A:
referring to fig. 11, define: o (0,0), A (Xa, Ya), B (Xb, Yb), C (Xc, Yc), D (Xd, Yd), G (Xg, Yg); substituting Xb ═ Xg-1/2w into equation 1 to obtain
Substituting Yc-Yg-1/2 h into equation 1 to obtain
Wherein, A (Xa, Ya) is A (Xg-1/2w, Yg-1/2 h); the length of the line segment AB is AB, and the length of the line segment AC is AC; comprises the following steps:
thus, S Δ ABC 1/2 ab ac can be calculated.
Defining: the angle DoY is equal to theta 1, the angle BOY is equal to theta 2, and the angle BOD is equal to theta;
SΔOBC＝1/2*Rcosθ*2Rsinθ＝1/2*R^2*sin2θ；
s sector OBC ═ 2 θ ═ π R ^2)/360 ═ θ ^ π R ^ 2)/180;
then S arc BC ═ S sector OBC-S delta OBC ═ (theta ^ pi ^ R ^2)/180-1/2 ^ R ^2 ^ sin2 theta;
the missing area of the irregularly-shaped crossed electrode in fig. 11 can be calculated as follows: s deficiency is S Δ ABC + S arc BC.
Scheme B:
referring to fig. 12, define: o (0,0), A (Xa, Ya), B (Xb,yb), C (Xc, Yc), D (Xd, Yd), E (Xe, Ye), G (Xg, Yg). Substituting Xb ═ Xg-1/2w into equation 1 to obtain
The length of the line segment AB is AB, and the length of the line segment AC is AC; comprises the following steps:
ac＝w；
so S Δ ABC 1/2 ab ac can be calculated.
Substituting Xe +1/2w into equation 1 to obtain
Length of line segment CE
Therefore, S Δ BCE 1/2 ce ac can be calculated.
Defining: the angle DoY is equal to theta 1, the angle BOY is equal to theta 2, and the angle BOD is equal to theta;
SΔOBE＝1/2*Rcosθ*2Rsinθ＝1/2*R^2*sin2θ；
s sector OBE ═ 2 θ ═ π R ^2)/360 ═ θ ^ π R ^ 2)/180;
then S arc BE ═ S sector OBE-S delta OBE ═ (theta ^ pi ^ R ^2)/180-1/2 ^ R ^2 ^ sin2 theta; the missing area of the irregularly-shaped crossed electrode in fig. 12 can be calculated: S-deficiency-S Δ ABC + S Δ BCE + S arc BE.
Scheme C:
referring to fig. 13, define: o (0,0), A (Xa, Ya), B (Xb, Yb), C (Xc, Yc), D (Xd, Yd), E (Xe, Ye), F (Xf, Yf), G (Xg, Yg), M (Xm, Ym). Comprises the following steps: since the length AB of the line segment AB is h and the length AC of the line segment AC is w, S Δ ABC is 1/2 AB AC can be calculated.
Substituting Xe +1/2w into equation 1 to obtain
The length of the line segment CE
S Δ BCE 1/2 ce ac can be calculated.
Substituting Yf to Yg +1/2h into equation 1 to obtain
Comprises the following steps: b (Xb, Yb) ═ B (Xg-1/2w, Yg +1/2 h); m (Xm, Ym) ═ M (Xg +1/2w, Yg +1/2 h); the length of the line segment BF
Length of line segment EM
Therefore, S Δ BEF 1/2 bf em may be calculated.
Defining: the angle DOY is equal to theta 1, the angle FOY is equal to theta 2, and the angle FOD is equal to theta;
SΔOFE＝1/2*Rcosθ*2Rsinθ＝1/2*R^2*sin2θ；
s sector OFE ═ 2 θ ═ π R ^2)/360 ═ θ ^ π R ^ 2)/180;
then S arc FE ═ S sector OFE-S delta OFE ═ (theta ^ pi ^ R ^2)/180-1/2 ^ R ^2 ^ sin2 theta; the missing area of the irregularly-shaped crossed electrode in fig. 13 can be calculated as follows: s-deficiency is S Δ ABC + S Δ BCE + S Δ BEF + S arc FE.
Scheme D:
referring to fig. 14, define: o (0,0), A (Xa, Ya), B (Xb, Yb), C (Xc, Yc), D (Xd, Yd), F (Xf, Yf), G (Xg, Yg).
The length ab of the line segment SB is h; substituting Yc-Yg-1/2 h into equation 1 to obtain
A (Xa, Ya) is A (Xg-1/2w, Yg-1/2h), segment AB length AB is h, segment AC length
Then, S Δ ABC 1/2 ab ac can be calculated.
Substituting Yf to Yg +1/2h into equation 1 to obtain
B (Xb, Yb) ═ B (Xg-1/2w, Yg +1/2 h); the length of the line segment BF
Then S Δ BCF 1/2 bf ab may be calculated.
Defining: the angle DOY is equal to theta 1, the angle FOY is equal to theta 2, and the angle FOD is equal to theta;
SΔOFC＝1/2*Rcosθ*2Rsinθ＝1/2*R^2*sin2θ；
s sector OFC ═ 2 θ ═ π R ^2)/360 ═ θ ^ π R ^ 2)/180;
then S arc FC ═ S sector OFC-S Δ OFC ═ (θ ^ pi ^ R ^2)/180-1/2 ^ R ^2 ^ sin2 θ; the missing area of the irregularly-shaped crossed electrode in fig. 14 can be calculated as follows: s deficiency is S Δ ABC + S Δ BCF + S arc FC.
In one embodiment, step S133 includes: calculating to obtain the number of series connections according to the resistance value corresponding to the missing area and the resistance value of the discrete resistor; a plurality of discrete resistors with the number being the serial number are sequentially connected in series to obtain a resistor compensation unit which is connected in parallel with the special-shaped crossed electrodes in the corresponding first touch electrode strips; and a resistance compensation unit obtained by sequentially connecting a plurality of discrete resistors in series with the number of the discrete resistors in series is connected in parallel with the corresponding special-shaped crossed electrodes in the corresponding second touch electrode strips.
The resistances of the individual discrete resistors are equal. And calculating to obtain the serial number according to the resistance value corresponding to the missing area and the resistance value of the discrete resistor, and specifically, dividing the resistance value corresponding to the missing area by the resistance value of the discrete resistor to obtain the serial number. Through adopting a plurality of discrete resistors to establish ties, conveniently to whole resistance's regulation and selection after establishing ties, the structure flexibility is high.
In one embodiment, a display device is provided, which includes a display panel and a capacitive touch panel, the display panel and the capacitive touch panel being stacked.
Referring to fig. 1, the capacitive touch panel includes a first touch electrode strip 110, a second touch electrode strip 120, and a resistance compensation unit; the first touch electrode stripes 110 are arranged along a first direction, the second touch electrode stripes 120 are arranged to cross the first touch electrode stripes 110 along a second direction and are insulated from each other, and the first direction and the second direction are crossed. The irregular cross electrodes in the first touch electrode strip 110 are connected in parallel with the corresponding resistance compensation units, and the irregular cross electrodes in the second touch electrode strip 120 are connected in parallel with the corresponding resistance compensation units; the special-shaped cross electrodes are cross electrodes with electrode loss.
In the display device, the resistance compensation units are respectively connected in parallel to the irregular-shaped cross electrodes of the first touch electrode strip 110 and the second touch electrode strip 120, so that the resistance values of the irregular-shaped cross electrodes of the first touch electrode strip 110 and the irregular-shaped cross electrodes of the second touch electrode strip 120 are reduced, the corresponding touch signals are enhanced, and the touch sensing sensitivity can be improved.
For the specific definition of the capacitive touch panel in the display device, reference may be made to the above definition of the capacitive touch panel, which is not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A capacitive touch panel is characterized by comprising a first touch electrode strip, a second touch electrode strip and a resistance compensation unit;
the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed manner with the first touch electrode strips along a second direction and are insulated from each other, the first direction is crossed with the second direction, the special-shaped crossed electrodes in the first touch electrode strips are connected with the corresponding resistance compensation units in parallel, and the special-shaped crossed electrodes in the second touch electrode strips are connected with the corresponding resistance compensation units in parallel; the special-shaped cross electrodes are cross electrodes with electrode loss; the resistance compensation unit is arranged in the slotted area of the capacitive touch panel.
2. The capacitive touch panel according to claim 1, wherein a resistance of the resistance compensation unit is equal to a resistance corresponding to a missing area of the irregularly-shaped crossing electrodes connected in parallel to the regular crossing electrodes of the first touch electrode strip and the second touch electrode strip.
3. The capacitive touch panel of claim 1, wherein the resistance compensation unit comprises a plurality of discrete resistors connected in series in sequence.
4. The capacitive touch panel of claim 3, wherein the discrete resistors are made of silver, aluminum, or ITO.
5. The capacitive touch panel according to claim 1, further comprising an IC chip, wherein the first touch electrode strip and the second touch electrode strip are respectively connected to the IC chip.
6. A compensation method of a capacitive touch panel is characterized in that the capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit; the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a cross mode with the first touch electrode strips along a second direction and are insulated from each other, and the first direction and the second direction are crossed, wherein the method comprises the following steps:
respectively positioning the special-shaped crossed electrodes in the first touch electrode strip and the second touch electrode strip;
respectively connecting the special-shaped cross electrodes in the first touch electrode strips and the special-shaped cross electrodes in the second touch electrode strips in parallel with the corresponding resistance compensation units; the resistance compensation unit is arranged in the slotted area of the capacitive touch panel.
7. The method of claim 6, wherein the connecting the specially-shaped cross electrodes in the first touch electrode strip and the specially-shaped cross electrodes in the second touch electrode strip in parallel with the respective corresponding resistance compensation units respectively comprises:
calculating the missing areas of the irregular-shaped crossed electrodes in the first touch electrode strip and the second touch electrode strip compared with the regular crossed electrodes of the first touch electrode strip and the second touch electrode strip respectively;
calculating to obtain a resistance value corresponding to the missing area according to the missing area, the size of the corresponding special-shaped crossed electrode and the resistivity of the corresponding special-shaped crossed electrode;
and the resistance compensation units with the resistance values equal to the resistance values corresponding to the missing areas are respectively adopted and connected in parallel with the specially-shaped crossed electrodes of the first touch electrode strips and the specially-shaped crossed electrodes of the second touch electrode strips which respectively correspond to the resistor compensation units.
8. The method according to claim 7, wherein the connecting, in parallel, the specially-shaped cross electrodes of the first touch electrode strip and the specially-shaped cross electrodes of the second touch electrode strip respectively using the resistance compensation units with the resistance equal to the resistance corresponding to the missing area comprises:
calculating to obtain the number of series connections according to the resistance value corresponding to the missing area and the resistance value of the discrete resistor;
connecting a resistance compensation unit obtained by sequentially connecting a plurality of discrete resistors with the number being the serial number in series with the special-shaped crossed electrodes in the corresponding first touch electrode strips in parallel;
and the resistance compensation units obtained by sequentially connecting the discrete resistors with the number being the serial number in series are connected with the special-shaped crossed electrodes in the corresponding second touch electrode strips in parallel.
9. The display device is characterized by comprising a display panel and a capacitive touch panel, wherein the display panel and the capacitive touch panel are arranged in a laminated manner; the capacitive touch panel comprises a first touch electrode strip, a second touch electrode strip and a resistance compensation unit;
the first touch electrode strips are arranged along a first direction, the second touch electrode strips are arranged in a crossed manner with the first touch electrode strips along a second direction and are insulated from each other, the first direction is crossed with the second direction, the special-shaped crossed electrodes in the first touch electrode strips are connected with the corresponding resistance compensation units in parallel, and the special-shaped crossed electrodes in the second touch electrode strips are connected with the corresponding resistance compensation units in parallel; the special-shaped cross electrodes are cross electrodes with electrode loss; the resistance compensation unit is arranged in the slotted area of the capacitive touch panel.
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| CN109445633B (en) * | 2018-10-29 | 2023-04-07 | 武汉天马微电子有限公司 | Display panel and display device |
| CN109814759B (en) * | 2019-01-31 | 2022-04-12 | 上海天马微电子有限公司 | Display panel and display device |
| TWI695306B (en) * | 2019-01-31 | 2020-06-01 | 友達光電股份有限公司 | Touch display apparatus |
| CN110058728B (en) * | 2019-03-15 | 2023-03-21 | 广州国显科技有限公司 | Touch structure, touch positioning method and touch display device |
| CN110244873B (en) | 2019-06-05 | 2022-10-04 | 武汉天马微电子有限公司 | Touch display panel and display device |
| CN111949158B (en) * | 2020-08-11 | 2022-03-01 | 昆山国显光电有限公司 | Touch display panel and touch display device |
| CN113050838B (en) | 2021-04-26 | 2023-11-28 | 武汉天马微电子有限公司 | Touch display panel and touch display device |
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