CN101957677A - Touch control panel - Google Patents

Abstract

The invention discloses a touch control panel, which comprises a sensing layer, a plurality of sensing lines and a plurality of touch control units, wherein the sensing layer is provided with a plurality of sensing lines extending in a first direction and arranged along a second direction, and each sensing line is provided with a first end and a second end along the first direction and is respectively and electrically connected to a sensing circuit; the sensing circuit calculates a coordinate of a touch position in the first direction according to voltage change values at two ends of the sensing line.

Description

Trackpad

Technical field

The invention relates to a kind of Trackpad, particularly a kind ofly promote the sensing renewal rate, and improve the Trackpad of the single sensed layer structure of coordinate Calculation mode.

Background technology

Present various electronic installation the widespread use touch technology as its input mode, the user is as long as gently press display pannel with finger or pointer, get final product reading information or carry out transmission of Information, can save button, keyboard or the slide bar that must dispose on the traditional electronic devices.

Contact panel is according to the difference of its sensing principle, mainly can be divided into resistance-type, condenser type, infrared-type and ultrasonic formula etc., wherein infrared-type and ultrasonic formula contact panel are in the X-axis of screen and a side of Y-axis infrared ray or supersonic emissive source to be set, and at opposite side installation reception sources, when user's contact screen, infrared ray or supersonic motion promptly are interfered, and promptly finish touch-control input via measuring with confirming the position coordinates that is disturbed.Electric resistance touch-control panel system is coincided by two groups of ITO (tin indium oxide) conductive film up and down and forms, and utilizes pressure and after making the upper/lower electrode conducting, predicts the change in voltage of panel and calculate contacting points position to import via controller.Then constituted as for capacitance type touch-control panel by the clear glass that the surface is coated with the oxidized metal, voltage is provided and forms uniform electric field by its four corners in glass surface, utilize the user to point and electric field between the capacitance variations that produced of static reaction detect input coordinate.

The sensed layer of known capacitance formula contact panel is generally double-decker, see also Figure 1A and 1B, it shows U.S. Patent number 5418551 and 5083118 disclosed contactor control devices, its sensed layer is all double-decker, one deck is in order to the coordinate of sensing X-direction, another layer is in order to the coordinate of sensing Y direction, have a plurality of sense wires that are parallel to each other on each sensed layer, shown in Figure 1B, be plated in respectively on the transparency carrier, by the gluing mode two transparency carriers sticked together again, promptly form the sensed layer shown in Figure 1A, again by a circuits sense X, the change in voltage of each sense wire of Y-axis can calculate the position of user's touch point.

Yet this double-decker needs extra transparency carrier or isolated two sensed layer of insulation course, causes the thickness increase and the cost of panel higher.

Therefore, a kind of contact panel sensed layer of single layer structure has been proposed at U.S. Patent number 691049, shown in Fig. 1 C, it comprises a plurality of rectangle sense wire 321-329 that are parallel to each other, be connected sensing circuit respectively at left end a with right-hand member b, it calculates the Y coordinate of position of touch according to the sense wire coordinate of maximum voltage variation or with interpolation method, and detects the voltage of this sense wire left end and right-hand member, calculates the X coordinate=LV of position of touch _l/ (V _l+ V _r), L is the pass through length of X-direction of sense wire, V _lAnd V _rBe respectively the voltage of left end and right-hand member.Yet, each sense wire two ends of sensed layer need be conducting on the sense line by multiplex's switch (multiplexer) switching left end and each sensing points of right-hand member, the number of sensing points the more, can increase the frequency that multiplex's switch switches, make that the speed of upgrading is slack-off, and the position of touch error that this computing method is calculated is bigger, and resolution and signal to noise ratio (S/N ratio) are not high.

In addition, except above-mentioned known technology, in U.S. Patent number 4071691,4455452,4550221,4639720,4733222,4980519,6147680,6188391,7129935,7202859,7218124,4071691,6297811,5650597,6825833,6961049,5861583 and patents such as 5305017, also disclose different contact panel sensing structures, but equally all had above-mentioned shortcoming.

Summary of the invention

The invention provides a kind of Trackpad, particularly a kind ofly promote the sensing renewal rate, and improve the Trackpad of the single sensed layer structure of coordinate Calculation mode.

Trackpad of the present invention comprises a plurality of sense wires that extend a first direction, arrange along a second direction, each this sense wire has one first end and one second end along this first direction, these a plurality of sense wires are concatenated into a S type structure in twos in this first end or this second end, and are electrically connected to a sensing circuit; Wherein this sensing circuit calculates the coordinate of a position of touch in this first direction and this second direction according to the voltage change at these sense wire two ends.

This sensed layer comprises N bar sense wire, and i bar sense wire and (i-1) bar sense wire electrically connect in an end, and are connected to sensing circuit jointly, i bar sense wire and (i+1) bar sense wire electrically connect in the other end, are connected to sensing circuit, wherein i=2 more jointly, 3,4... (N-1).Wherein the 1st sense wire directly is connected this sensing circuit with N bar sense wire respectively at first end or second end, and in addition, the 1st sense wire also can electrically connect in first end or second end with N bar sense wire earlier, is electrically connected to this sensing circuit more jointly.

Above-mentioned first direction and second direction are respectively an X-direction and Y direction, or are a Y direction and X-direction.

Above-mentioned sense wire is preferably rectangle, trapezoidal, polygon, ellipse, strip or irregular shape, also can be a plurality of rhombuses, triangle, sexangle, rectangle, polygon, ellipse, circle or difform sensing cell and is connected by a sensing lead.

This Trackpad also comprises one first substrate, and this sensed layer is arranged on this first substrate with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method.This Trackpad can comprise a protective seam; be arranged at the opposite side of this sensed layer with respect to this first substrate; this protective seam can be pasted on first substrate by one first packed layer; this sensed layer also can be arranged at this protective seam with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method earlier; paste on this first substrate in the gluing mode in the lump again; this Trackpad also comprises an anti-reflecting layer, a sclerosis protective seam or an anti-gray knoisphere, is arranged at the opposite side of this protective seam with respect to this sensed layer.This Trackpad also can comprise an anti-tampering layer or one second substrate, be arranged at this first substrate opposite side of this sensed layer relatively, this anti-tampering layer is arranged on this first substrate or this second substrate with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method, and wherein this anti-tampering layer or this second substrate are pasted on first substrate by one second packed layer.

This first substrate, this second substrate and this protective seam are a transparent or opaque substrate, and its material is preferably glass, plastics, pottery, rubber, circuit substrate or insulating material.

The material of this sensed layer and this anti-tampering layer is preferably ITO, AZO, SnO ₂, copper, aluminium, silver, gold, metal or conductive material.

For reaching above-mentioned purpose, comprise a sensed layer according to Trackpad of the present invention, this sensed layer comprises a plurality of sense wires that extend first direction, arrange along second direction, each sense wire has one first end and one second end along first direction, wherein at least one end connects a sensing circuit, and is connected with at least one resistor between the adjacent sense wire, and wherein this sensing circuit calculates the coordinate of a position of touch in first direction and second direction according to the voltage change of sense wire.

This resistor is an electronic component, a transparent resistance layer or an opaque resistive layer, and this transparent resistance layer comprises ITO, AZO or SnO ₂, this opaque resistive layer comprises carbon, graphite or manufacture of semiconductor sheet resistance.Be connected by a plurality of leads between these a plurality of sense wires and the sensing circuit, the resistance value of these a plurality of leads is lower than the resistance value of this at least one resistor.

This resistor is preferably a connecting line, connect two adjacent sense wires, sense wire is preferably identical material with connecting line, and be combined as a whole, these a plurality of sense wires and a plurality of connecting lines are cross-linked into a plane with a plurality of perforates, each perforate is centered on by two adjacent sense wires and two connecting lines and forms, these a plurality of sense wires are vertical each other with these a plurality of connecting lines, wherein first end of each sense wire and second end can be connected to sensing circuit respectively, or only connect sensing circuit by first end of sense wire or second end.

For reaching above-mentioned purpose, comprise a sensed layer according to Trackpad of the present invention, this sensed layer comprises a plurality of sense wires that extend a first direction, arrange along a second direction, each this sense wire has one first end and one second end along this first direction, connect a sensing circuit respectively, the length of this first end and this second end is unequal; Wherein this sensing circuit calculates the coordinate of a position of touch in first direction and second direction according to the voltage change at these sense wire two ends.

That this sense wire is preferably is trapezoidal, polygon, ellipse, strip or irregular shape.

In addition, comprise a sensed layer according to Trackpad of the present invention, this sensed layer comprises a plurality of sense wires that extend a first direction, arrange along a second direction, each this sense wire has one first end and one second end along this first direction, connect a sensing circuit respectively, wherein this sensing circuit according to the change in voltage value difference at these sense wire two ends and voltage change and ratio calculation one position of touch in the coordinate of this first direction.

This sensing circuit calculates the coordinate of this position of touch in this first direction according at least one this sense wire of change in voltage maximum, when the first terminal voltage changing value of this sense wire of this change in voltage maximum is V _C1, the second terminal voltage changing value is V _D1, then this sensing circuit calculates this position of touch in the coordinate X=of this first direction (V _D1-V _C1)/(V _C1+ V _D1)

Sense wire that can also a plurality of change in voltage maximums calculates, in the M of this change in voltage maximum bar sense wire, its i bar sense wire (i=1,2, first terminal voltage changing value 3...M) is V _Ci, the second terminal voltage changing value of i bar sense wire is V _Di, then this sensing circuit calculates the coordinate of this position of touch in this first direction $X=\frac{\underset{i=1}{\overset{M}{\mathrm{\Σ}}}(V_{\mathrm{di}}-V_{\mathrm{ci}})}{\underset{i=1}{\overset{M}{\mathrm{\Σ}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}.$

This sensing circuit calculates the coordinate of this position of touch in this second direction according to the gravity centre distribution of the voltage change of a plurality of sense wires in addition, and wherein this sensed layer comprises N bar sense wire, and i bar sense wire (i=1,2,3...N) coordinate in this second direction is Y _i, the first terminal voltage changing value of i bar sense wire is V _Ci, the second terminal voltage changing value of i bar sense wire is V _Di, then the voltage change that this sensing circuit can first end calculates the coordinate of position of touch in this second direction

Voltage change that also can second end calculates the coordinate of position of touch in this second direction

Can also first end calculate the coordinate of position of touch in this second direction in conjunction with the voltage change of second end $Y=\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{Y}_i\·(V_{\mathrm{vi}}+V_{\mathrm{di}})}{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}.$

Description of drawings

Figure 1A～1C shows the synoptic diagram of known Trackpad sensed layer structure;

Fig. 2 A, 3A and 3B show the synoptic diagram according to first preferred embodiment of Trackpad sensed layer of the present invention;

The flow chart of steps of the sensed layer transfer sequence of Fig. 2 B and 3C displayed map 2A, 3A and 3B;

Fig. 4 shows the synoptic diagram of another preferred embodiment of Trackpad sensed layer of the present invention;

Fig. 5 A and 5B show the synoptic diagram according to second preferred embodiment of Trackpad sensed layer of the present invention;

The synoptic diagram of the sense wire change in voltage of Fig. 5 C displayed map 5A through pointing touch-control;

Fig. 5 D shows the synoptic diagram of the sense wire change in voltage through pointing touch-control of known sensed layer;

Among Fig. 6 A and the 6B displayed map 5B with the synoptic diagram of connecting line as the preferred embodiment of resistor;

Fig. 7 A and 7B show the synoptic diagram of a preferred embodiment again of Trackpad sensed layer of the present invention;

Fig. 8 shows the synoptic diagram of a preferred embodiment of the coordinate Calculation method of Trackpad sensed layer of the present invention; And

Fig. 9 A～9C shows the synoptic diagram of the preferred embodiment of Trackpad of the present invention.

[main element label declaration]

20: Trackpad 21: sensed layer

22: sensing circuit 41: sensing cell

42: sensing lead 51: lead

71: trapezoidal sense wire 91: anti-reflecting layer

92: protective seam 93: sensed layer

95: the first packed layers of 94: the first substrates

Substrate 97 in 96: the second: anti-tampering layer

98: the second packed layer a: left end

B: right-hand member c: first end

D: the second end H: perforate

R1～R51: resistor S1～S6: sense wire

T: position of touch C1～C51: connecting line

V _C1～V _C6, V _D1～V _D6: voltage change

Embodiment

Hereinafter with reference to correlative type, according to preferred embodiment of the present invention, wherein components identical will be with identical being illustrated with reference to label with explanation.

See also Fig. 2 A, it shows first preferred embodiment according to the sensed layer of Trackpad of the present invention, the sensed layer 21 of Trackpad 20 comprises a plurality of sense wire S1-S6 that extend X-direction, arrange along Y direction, each sense wire has one first end c and one second end d, these a plurality of sense wires electrically connect in this first end c or this second end d, are connected to a sensing circuit 22 more jointly; Wherein this sensing circuit 22 calculates position of touch in the coordinate of this X-direction and Y direction according to the voltage change at these sense wire two ends.

Wherein the second end d along the 1st sense wire S1 of Y direction is connected directly to sensing circuit, connected mode between sense wire and sensing circuit is with the 2nd figure, article 2, sense wire S2 electrically connects in the first end c mutually with the 1st sense wire S1, be electrically connected to this sensing circuit 22 more jointly, article 2, sense wire S2 and the 3rd sense wire S3 are after the second end d electrically connects, be electrically connected to sensing circuit 22 more jointly, article 4, sense wire S4 then electrically connects the 3rd and 5 sense wire S3 respectively at the first end c and the second end d, S5, be electrically connected to sensing circuit 22 more jointly, article 6, sense wire S6 connects the 5th sense wire S5 in the first end c, and is connected directly to sensing circuit 22 in the second end d.A plurality of first ends of a plurality of sense wires and a plurality of second end are concatenated into a S type structure in twos.

See also Fig. 2 B, the step of the sensed layer sensing switch point of its displayed map 2A, by step (a)-＞(b)-＞(c)-＞(d)-＞(e)-＞(f) switch in regular turn, and then repetitive cycling above-mentioned steps, the two ends of the 1st sense wire S1 are conducting on the sensing circuit when switching to step (a), and the voltage change of measuring is respectively V _C1, V _D1, the 2nd sense wire S2 two ends are conducting on the sensing circuit when switching to step (b), and the voltage change of measuring is respectively V _C2, V _D2, the rest may be inferred, so nearly saving under the situation of the sensing points number of half, just can measure the voltage change at all sense wire two ends.

Fig. 3 A is similar to the connected mode of Fig. 2 A with 3B, its difference person only is that the 1st sense wire S1 and the 6th sense wire S6 are not connected directly to sensing circuit 22, but be electrically connected to sensing circuit 22 more jointly after electrically connecting mutually earlier, in addition, article 1, sense wire S1 and the 6th sense wire S6 can mutual electric connection be connected to sensing circuit again on Trackpad 20, as shown in Figure 3A; Also may extend to Trackpad 20 outer electric connections again, shown in Fig. 3 B.If the 1st sense wire S1 is connected earlier on Trackpad 20 with the 6th sense wire S6, must be by isolated other lead of an insulator.And the transfer sequence of Fig. 3 A and 3B is shown in Fig. 3 C, equally by step (a)-＞(b)-＞(c)-＞(d)-＞(e)-＞(f) switch and then repetitive cycling above-mentioned steps in regular turn.

In addition, sense wire also can be formed by a plurality of sensing cell serial connections, as shown in Figure 4, these a plurality of sensing cells 41 are connected by sensing lead 42, form the sense wire that X-direction is extended, many sense wire is arranged and the formation sensed layer along Y direction, and the shape of sensing cell 41 is unrestricted, can be rhombus, triangle, sexangle, rectangle, polygon, ellipse, circle or irregular shape.

See also Fig. 5 A and 5B, it shows second preferred embodiment according to Trackpad of the present invention, a plurality of sense wires that extend X-direction, arrange along Y direction, each sense wire has one first end and one second end along X-direction, wherein at least one end connects a sensing circuit, and be connected with at least one resistor between the adjacent sense wire, in the present embodiment, between article one sense wire S1 and second sense wire S2, be connected with a resistor R 1 in first end, second end is connected with a resistor R 11, between second sense wire S2 and the 3rd sense wire S3, be connected with resistor R 2 in first end, be connected with resistor R 21 in second end, resistor connected mode between other sense wire by that analogy, but not as limit, the quantity of resistor and connected mode also can be adjusted according to actual needs, and sensing circuit calculates position of touch in the coordinate of X-direction and Y direction according to the voltage change of sense wire.

Be connected by a plurality of leads 51 between sense wire and the sensing circuit, the resistance value of these a plurality of leads 51 is lower than the resistance value of this resistor, is a good conductor.

This resistor is an electronic component, a transparent resistance layer or an opaque resistive layer, and this transparent resistance layer comprises ITO, AZO or SnO ₂, this opaque resistive layer comprises carbon, graphite or manufacture of semiconductor sheet resistance.Be connected by a plurality of leads between these a plurality of sense wires and the sensing circuit, the resistance value of these a plurality of leads is lower than the resistance value of this at least one resistor.

In this embodiment, having resistor between each sense wire is connected, the current signal variable quantity of the feasible position of touch sense wire of flowing through is assigned on the contiguous sense wire, and when the finger touch sense wire, its change in voltage is shown in Fig. 5 C, Fig. 5 D then is the change in voltage of known sensed layer structure when the finger touch-control, both compare, and the voltage of present embodiment distributes comparatively broad, therefore can reduce the digitizing influence of sense wire quantity, the changes in coordinates that calculates when position of touch is moved is more level and smooth

This resistor can be a connecting line, as shown in Figure 6A, between article one sense wire S1 and second sense wire S2, pass through connecting line C1, C11 is connected, between second sense wire S2 and the 3rd sense wire S3, pass through connecting line C2, C21 is connected, connecting line connected mode between other sense wire by that analogy, sense wire is preferably identical material with connecting line, and be combined as a whole, these a plurality of sense wires and a plurality of connecting lines are cross-linked into a plane with a plurality of perforate H, each perforate H is centered on by two adjacent sense wires and two connecting lines and forms, these a plurality of sense wires are vertical each other with these a plurality of connecting lines, wherein the first end c of each sense wire and the second end d can be connected to sensing circuit respectively, or only connect sensing circuit by the first end c of sense wire or the second end d, shown in Fig. 6 B.

See also Fig. 7 A, it shows the 3rd preferred embodiment of the sensed layer of Trackpad of the present invention, arrange in the same way by a plurality of trapezoidal sense wires and form sensed layer, this trapezoidal sense wire has one first end c and one second end d along X-direction, the length of the first end c and the second end d is unequal, utilize trapezoidal sense wire can make that the finger contact area near the first end c is big more more, the touch-control area is also just big, and then make the voltage change of the end c that wins bigger than rectangle sense wire, therefore use the voltage change of the first end c to calculate the X-axis coordinate time, resolution and signal to noise ratio (S/N ratio) can be better.In addition, the present invention also can be by the reverse interleaved arrangement of a plurality of trapezoidal sense wires, and shown in Fig. 7 B, this arrangement mode makes that the magnitude of voltage of the even number sense wire first end c is bigger, and the magnitude of voltage of the radix sense wire second end d is bigger.Yet the shape of sense wire is rectangle or trapezoidal not necessarily, but actual needs is rectangle, trapezoidal, polygon, ellipse, strip or irregular shape.

See also Fig. 8, it shows the preferred embodiment of Trackpad sensed layer of the present invention and coordinate Calculation mode thereof, this sensed layer comprises a plurality of sense wire S1-S4 that extend X-direction, arrange along Y direction, present embodiment explains with 4 sense wires, but not as limit, the quantity of sense wire, shape and connected mode can be adjusted arbitrarily according to actual needs, sensed layer applicable to the serial connection of S type shown in above-mentioned Fig. 2 A and 2B mode, applicable to above-mentioned Fig. 5 A and the sensed layer that is connected sense wire shown in the 5B with resistor, or be applicable to above-mentioned Fig. 6 A and the sensed layer that is connected sense wire shown in the 6B with connecting line, also can be used for the described trapezoidal sense wire of Fig. 7 A and 7B.Each sense wire S1-S4 has one first end c and one second end d, connect a sensing circuit 22 respectively, sensing circuit according to the change in voltage value difference at sense wire two ends and voltage change and ratio calculation position of touch T at the coordinate of X-direction, its preferable account form has two kinds, a kind of is that sense wire with the voltage change maximum calculates, be the 2nd sense wire S2 in the present embodiment, the voltage change at its two ends is respectively V _C2And V _D2, then sensing circuit calculates the coordinate X=(V of position of touch X-direction _D2One V _C2)/(V _C2+ V _D2).Another kind of account form then is that the sense wire with a plurality of change in voltage maximums calculates, and in the present embodiment, all includes calculating in 4 sense wires among the 2nd figure, and its account form is $X=\frac{\underset{i=1}{\overset{4}{\mathrm{\Σ}}}(V_{\mathrm{di}}-V_{\mathrm{ci}})}{\underset{i=1}{\overset{4}{\mathrm{\Σ}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}=\frac{(V_{d1}-V_{c1})+(V_{d2}-V_{c2})+(V_{d3}-V_{c3})+(V_{d4}-V_{c4})}{(V_{c1}+V_{d1})+(V_{c2}+V_{d2})+(V_{c3}+V_{d3})+(V_{c4}+V_{d4})}.$

Use V according to the resulting X-axis coordinate of account form of the present invention because of molecular moiety more _DiSubtract each other, so the X coordinate intercept of calculating when sense wire is central when position of touch is zero, and known account form is non-vanishing values in sense wire central authorities, so when a large amount of production, need these non-vanishing values that store in the program of coordinates computed more, and this value changes because of different sense wire resistances easily, and is inconvenient in the use, also causes resolution and signal to noise ratio (S/N ratio) (S/N ratio) relatively poor.

In addition, part at the Y-axis coordinate, sensing circuit then calculates with the gravity centre distribution of voltage change, preferable account form has three kinds, first kind is that voltage change with the sense wire S1-S4 first end c calculates, article 4, sense wire is respectively Y1, Y2, Y3 and Y4 at the coordinate of Y direction, and then position of touch is at the coordinate of Y direction $Y=\frac{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;V_{\mathrm{ci}}}{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}{V}_{\mathrm{ci}}}=\frac{{\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">Y</figure-callout>}}_2\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="V\; c"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="3"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">Y</figure-callout>}}_3\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="4"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">Y</figure-callout>}}_4\&CenterDot;V_{c4}}{{\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="2"\; label="V\; c"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="3"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+{\mathrm{<figure-callout\; id="4"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">V</figure-callout>}}_c}.$

Second kind of preferable account form is that the voltage change with the sense wire S1-S4 second end d calculates, and its account form is $Y=\frac{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;V_{\mathrm{di}}}{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}{V}_{\mathrm{di}}}=\frac{{\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="V\; d"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">Y</figure-callout>}}_2\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="V\; d"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="3"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">Y</figure-callout>}}_3\&CenterDot;{\mathrm{<figure-callout\; id="3"\; label="V\; d"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="4"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">Y</figure-callout>}}_4\&CenterDot;V_{d4}}{{\mathrm{<figure-callout\; id="1"\; label="V\; d"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="2"\; label="V\; d"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="3"\; label="V\; d"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_d+{\mathrm{<figure-callout\; id="4"\; label="V\; d"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">V</figure-callout>}}_d}.$

The third preferable account form is that the voltage change with two ends c, d calculates, and its account form is $Y=\frac{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;(V_{\mathrm{ci}}+V_{\mathrm{di}})}{\underset{i=1}{\overset{4}{\mathrm{\&Sigma;}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}=\frac{{\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1\&CenterDot;({\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d1})+{\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">Y</figure-callout>}}_2\&CenterDot;({\mathrm{<figure-callout\; id="2"\; label="V\; c"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d2})+{\mathrm{<figure-callout\; id="3"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">Y</figure-callout>}}_3\&CenterDot;({\mathrm{<figure-callout\; id="3"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d3})+{\mathrm{<figure-callout\; id="4"\; label="Y"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">Y</figure-callout>}}_4\&CenterDot;({\mathrm{<figure-callout\; id="4"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d4})}{({\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="H2009101607078E0000041.png,H2009101607078E0000071.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d1})+({\mathrm{<figure-callout\; id="2"\; label="V\; c"\; filenames="H2009101607078E0000011.png,H2009101607078E0000012.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d2})+({\mathrm{<figure-callout\; id="3"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000041.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d3})+({\mathrm{<figure-callout\; id="4"\; label="V\; c"\; filenames="H2009101607078E0000012.png,H2009101607078E0000031.png"\; state="\{\{state\}\}">V</figure-callout>}}_c+V_{d4})}.$

According to the resulting Y-axis coordinate of account form of the present invention, because of the gravity centre distribution that adopts many sense wires is calculated, the Y-axis coordinate that more known two sense wires that only change with maximum voltage calculate with interpolation method can calculate position of touch more accurately.

See also Fig. 9 A and 9B; Trackpad of the present invention also comprises one first substrate 94; this sensed layer 93 is arranged on this first substrate 94 with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method; again a protective seam 92 is pasted at the opposite side of sensed layer 93 with respect to this first substrate 94 by one first packed layer 95 afterwards; can plate one deck anti-reflecting layer 91 again on the protective seam 92; also having or not of this anti-reflecting layer 91 decided according to actual needs, and also replaceable is sclerosis protective seam or anti-gray knoisphere.This sensed layer 93 also can directly be arranged on the back side of protective seam 92 with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method, paste on this first substrate 94, shown in Fig. 9 C by this first packed layer 95 again.

Preferable anti-tampering layer 97 and 1 second substrate 96 that also comprise of this Trackpad, this anti-tampering layer 97 is arranged on this second substrate 96 with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method, paste at the opposite side of first substrate 94 by second packed layer 98 in the lump again with respect to this sensed layer 93, second substrate 96 and second packed layer 98 also can be set, and anti-tampering layer 97 directly is arranged on this first substrate 94 with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method.

This first substrate 94, this second substrate 96 and this protective seam 92 are a transparent or opaque substrate, and its material is preferably glass, plastics, pottery, rubber, circuit substrate or insulating material.

The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the appended claim scope its equivalent modifications of carrying out or change.

Claims (37)

1. Trackpad comprises:

Sensed layer, comprise a plurality of sense wires that extend first direction, arrange that each this sense wire has first end and second end along this first direction along second direction, these a plurality of sense wires are concatenated into S type structure in twos in this first end or this second end, and are electrically connected to sensing circuit;

Wherein this sensing circuit calculates the coordinate of a position of touch in this first direction and this second direction according to the voltage change at these sense wire two ends.

2. Trackpad according to claim 1, wherein this sensed layer comprises N bar sense wire, i bar sense wire and (i-1) bar sense wire are in wherein end electric connection, and be electrically connected to this sensing circuit jointly, and i bar sense wire and (i+1) bar sense wire electrically connect in the other end, are electrically connected to this sensing circuit, wherein i=2 more jointly, 3,4... (N-1).

3. Trackpad according to claim 2, wherein the 1st sense wire directly is connected this sensing circuit with N bar sense wire respectively at this first end or this second end.

4. Trackpad according to claim 2, wherein the 1st sense wire and N bar sense wire electrically connect in this first end or this second end, are electrically connected to this sensing circuit more jointly.

5. Trackpad according to claim 1, wherein this sense wire is rectangle, trapezoidal, polygon, ellipse, strip or irregular shape.

6. Trackpad according to claim 1, wherein this sense wire comprises that a plurality of sensing cells are electrically connected by the sensing lead, this sensing cell is rhombus, triangle, sexangle, rectangle, polygon, ellipse, circle or irregular shape.

7. Trackpad, it comprises:

Sensed layer, comprise a plurality of sense wires that extend first direction, and arrange that each this sense wire has first end and second end along this first direction along second direction, wherein at least one end connects sensing circuit, and is connected with at least one resistor between this adjacent sense wire;

Wherein this sensing circuit calculates the coordinate of a position of touch in this first direction and this second direction according to the voltage change of this sense wire.

8. Trackpad according to claim 7, wherein this resistor is electronic component, transparent resistance layer or opaque resistive layer, this transparent resistance layer comprises ITO, AZO or SnO ₂, this opaque resistive layer comprises carbon, graphite or manufacture of semiconductor sheet resistance.

9. Trackpad according to claim 7 wherein is connected by a plurality of leads between these a plurality of sense wires and this sensing circuit, and the resistance value of these a plurality of leads is lower than the resistance value of this at least one resistor.

10. Trackpad according to claim 7, wherein this resistor is a connecting line, connects two adjacent sense wires.

11. Trackpad according to claim 10, wherein these a plurality of sense wires and these a plurality of connecting lines are identical material, and are combined as a whole.

12. Trackpad according to claim 10, wherein these a plurality of sense wires and this a plurality of connecting lines are cross-linked the plane that becomes to have a plurality of perforates, and perhaps these a plurality of sense wires and these a plurality of connecting lines are vertical each other.

13. Trackpad according to claim 12, wherein each this perforate is centered on by two these adjacent sense wires and two these connecting lines and is formed.

14. Trackpad according to claim 7, wherein this of each this sense wire first end is connected this sensing circuit respectively with this second end, or each this sense wire only this first end or this second end wherein an end connect this sensing circuit.

15. a Trackpad, it comprises:

Sensed layer comprises a plurality of sense wires that extend first direction, arranges along second direction, and each this sense wire has first end and second end along this first direction, connects sensing circuit respectively, and the length of this first end and this second end is unequal;

Wherein this sensing circuit calculates the coordinate of a position of touch in this first direction and this second direction according to the voltage change at these sense wire two ends.

16. Trackpad according to claim 15, wherein this sense wire is trapezoidal, polygon, ellipse, strip or irregular shape.

17. a Trackpad, it comprises:

Sensed layer comprises a plurality of sense wires that extend first direction, arranges along second direction, and each this sense wire has first end and second end along this first direction, connects sensing circuit respectively;

Wherein this sensing circuit according to the change in voltage value difference at these sense wire two ends and voltage change and ratio calculation one position of touch in the coordinate of this first direction.

18. Trackpad according to claim 17, wherein this sensing circuit calculates the coordinate of this position of touch in this first direction according at least one this sense wire of change in voltage maximum.

19. Trackpad according to claim 18, the first terminal voltage changing value of wherein working as this sense wire of this change in voltage maximum is V _C1, the second terminal voltage changing value is V _D1, then this sensing circuit calculates this position of touch in the coordinate X=of this first direction (V _D1-V _C1)/(V _C1+ V _D1).

20. Trackpad according to claim 18, wherein in the M bar sense wire of this change in voltage maximum, its i bar sense wire (i=1,2, first terminal voltage changing value 3...M) is V _Ci, the second terminal voltage changing value of i bar sense wire is V _Di, this sensing circuit calculates the coordinate of this position of touch in this first direction $X=\frac{\underset{i=1}{\overset{M}{\mathrm{\&Sigma;}}}(V_{\mathrm{di}}-V_{\mathrm{ci}})}{\underset{i=1}{\overset{M}{\mathrm{\&Sigma;}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}.$

21. Trackpad according to claim 17, wherein this sensing circuit calculates the coordinate of this position of touch in this second direction according to the gravity centre distribution of the voltage change of these a plurality of sense wires.

22. Trackpad according to claim 21, wherein this sensed layer comprises N bar sense wire, and i bar sense wire (i=1,2,3...N) coordinate in this second direction is Y _i, the first terminal voltage changing value of i bar sense wire is V _Ci, then this sensing circuit calculates the coordinate of this position of touch in this second direction $Y=\frac{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;V_{\mathrm{ci}}}{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{V}_{\mathrm{ci}}}.$

23. Trackpad according to claim 21, wherein this sensed layer comprises N bar sense wire, and i bar sense wire (i=1,2,3...N) coordinate in this second direction is Y _i, the second terminal voltage changing value of i bar sense wire is V _Di, then this sensing circuit calculates the coordinate of this position of touch in this second direction $Y=\frac{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;V_{\mathrm{di}}}{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{V}_{\mathrm{di}}}.$

24. Trackpad according to claim 21, wherein this sensed layer comprises N bar sense wire, and i bar sense wire (i=1,2,3...N) coordinate in this second direction is Y _i, the first terminal voltage changing value of i bar sense wire is V _Ci, the second terminal voltage changing value of i bar sense wire is V _Di, then this sensing circuit calculates the coordinate of this position of touch in this second direction $Y=\frac{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}{Y}_i\&CenterDot;(V_{\mathrm{ci}}+V_{\mathrm{di}})}{\underset{i=1}{\overset{N}{\mathrm{\&Sigma;}}}(V_{\mathrm{ci}}+V_{\mathrm{di}})}.$

25. according to the arbitrary described Trackpad of claim 1-24, wherein the material of this sensed layer is ITO, AZO, SnO ₂, copper, aluminium, silver, gold, metal or conductive material.

26. according to the arbitrary described Trackpad of claim 1-24, it is the Trackpad of single sensed layer structure.

27. according to the arbitrary described Trackpad of claim 1-24, it also comprises first substrate, this sensed layer is arranged at the top of this first substrate with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method, this first substrate is transparent or opaque substrate, and its material is glass, plastics, pottery, rubber, circuit substrate or insulating material.

28. Trackpad according to claim 27; it also comprises protective seam; be arranged at the opposite side of this sensed layer with respect to this first substrate, this protective seam is transparent or opaque substrate, and its material is glass, plastics, pottery, rubber, circuit substrate or insulating material.

29. Trackpad according to claim 28, wherein this protective seam is pasted on first substrate by first packed layer.

30. Trackpad according to claim 28, wherein this sensed layer is arranged at this protective seam with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method, pastes on this first substrate in the gluing mode in the lump again.

31. Trackpad according to claim 28, it also comprises anti-reflecting layer, sclerosis protective seam or anti-gray knoisphere, is arranged at the opposite side of this protective seam with respect to this sensed layer.

32. Trackpad according to claim 27, it also comprises the anti-tampering layer and second substrate, is arranged at this first substrate opposite side of this sensed layer relatively, and the material of this anti-tampering layer is ITO, AZO, SnO ₂, copper, aluminium, silver, gold, metal or conductive material, this second substrate is transparent or opaque substrate, its material is glass, plastics, pottery, rubber, circuit substrate or insulating material.

33. Trackpad according to claim 32, wherein this anti-tampering layer is arranged on this first substrate or this second substrate with plated film, physical deposition, chemogenic deposit, printing, sputter, gluing or coating method.

34. Trackpad according to claim 32, wherein this anti-tampering layer or this second substrate are pasted on first substrate by second packed layer.

35. Trackpad according to claim 17, wherein these a plurality of sense wires are concatenated into S type structure in twos in this first end or this second end.

36. Trackpad according to claim 17, wherein wherein at least one end of this of each this sense wire first end or this second end connects sensing circuit, and is connected with at least one resistor between this adjacent sense wire.

37. Trackpad according to claim 17, wherein the length of this of this sense wire first end and this second end is unequal.

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