The line construction of touch panelTechnical field
The present invention is a kind of line construction, and espespecially a kind of sectional area through change circuit is to reduce between different induction channelsThe line construction of the touch panel of resistance value difference.
Background technology
With the development of science and technology capacitance touch control screen is widely used in mobile phone, tablet computer etc. electronic equipment, peopleCan intuitively utilize finger or stylus operate application program, input message/word etc. behavior on the screen, eliminating needsTo use the trouble of input peripheral device (keyboard, mouse).
The operation of capacitance type touch-control panel, mainly according to user touch panel institute touch location capacitance variations comeDetermine touch point, further illustrate, be touch panel electrode and human finger between, the capacitance sense that is formed by contactIt answers, after the calculating of sensor, that is, switching to processing unit can be with the coordinate data of interpretation.
And in order to incude one of the variation of human finger capacitance, including circuit board touch panel, to be provided with plural number induction logicalRoad carrys out the variation of inductance capacitance, which is all connected to sensor through connection line.Thereby, subsequent control electricityRoad can differentiate human finger touch panel coordinate position.However, with the increase of touch-control product size, difference induction is logicalThe distance of the connection line in road increases therewith.
It please refers to Fig.1, shown in Fig. 2A and Fig. 2 B, is the A- of the line construction stereogram of prior art touch panel, Fig. 1The B-B sectional views of A sectional views and Fig. 1.It can be clearly seen from the figure that the circuit board 1 includes a sensor 15, the circuit board 1The first induction channels 11 the first connection line 12 length be a+b, the length of the n-th connection line 14 of the n-th induction channels 13Degree is a+b+c, by the formula of resistance it is known that resistance value is directly proportional to resistivity (ρ), track lengths (l), with circuit sectionProduct (A=WT) is inversely proportional, and it is constant that wherein resistivity is related with material property.It can be obtained by formula, with person's product sizeIncrease, the difference of resistance value also increases as between the first induction channels 11 and n-th (the last one) induction channels 13.
Therefore how to solve the problems, such as it is above-mentioned it is commonly using with missing, as the inventor of the present invention be engaged in the industry itRelevant manufactures want the path place person of research improvement.
Invention content
Therefore the inventor of the present invention is in view of above-mentioned missing, is collecting related data, via multi-party assessment and considers, andTo engage in many years of experience of the industry accumulation, via constantly studying and changing, the beginning designs such patent of invention person.
Purpose of the present invention is to provide a kind of sectional areas through change circuit to reduce resistance between different induction channelsThe line construction of the touch panel of value.
In order to reach above-mentioned or other purposes, a kind of line construction of touch panel of this creation is applied to include a circuitOne of plate touch panel, the circuit board include：One first induction channels, are set on the circuit board, first induction channelsIt is connected to a sensor through one first connection line；One second induction channels, are set on the circuit board, second inductionChannel is connected to the sensor through one second connection line, the length of second connection line be more than first connection line itLength, wherein the sectional area of second connection line is more than the sectional area of first connection line.
In a preferred embodiment, first connection line and second connection line are embedded in the circuit board.
In a preferred embodiment, which is embedded in the depth in the circuit board more than first connecting lineThe depth being embedded in the circuit board.
In a preferred embodiment, which it is logical towards second induction to be embedded in the depth in the circuit boardRoad direction is gradually deep.
In a preferred embodiment, the sectional area of second connection line is gradually big towards the second induction channels direction.
In a preferred embodiment, this creation is applied to capacitive films sensing touch panel.
Wherein, due to the length of second connection line be more than first connection line length, this creation enable this secondThe sectional area of connection line is more than the sectional area of first connection line.Thereby, this creation can reduce electricity between different induction channelsThe difference of resistance value.
Description of the drawings
Fig. 1 is the line construction stereogram of prior art touch panel；
Fig. 2A is the A-A sectional views of Fig. 1；
Fig. 2 B are the B-B sectional views of Fig. 1；
Fig. 3 is the stereogram of the line construction preferred embodiment of touch panel according to the present invention；
Fig. 4 A are the A-A sectional views of Fig. 3；
Fig. 4 B are the B-B sectional views of Fig. 3；And
Fig. 5 is the ratio for illustrating different depth ratio and resistance value difference, can be used as the Reference Design value of resistance value demand.
Drawing reference numeral explanation：
1 circuit board
11 first induction channels
12 first connection lines
13 n-th induction channels
14 n-th connection lines
15 sensors
2 circuit boards
21 first induction channels
22 first connection lines
23 second induction channels
24 second connection lines
25 sensors
A, b, c length
T, Tin, Tout depth
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
To reach above-mentioned purpose and effect, the technological means and construction that the present invention uses, the just present invention that hereby draws are preferableIts feature of embodiment elaborate and function are as follows, understand completely in order to sharp.
Please refer to shown in Fig. 3, Fig. 4 A and Fig. 4 B, for touch panel according to the present invention line construction preferred embodiment itThe B-B sectional views of stereogram, the A-A sectional views of Fig. 3 and Fig. 3.It can be clearly seen from the figure that a kind of touch panel of this creation itLine construction is applied to include an one of circuit board 2 touch panel.So-called circuit board 2 is that electronic building brick and electronic circuit connectThe supplier connect, and so-called touch panel is can to receive the inputs such as contact (including human finger finger or stylus etc.)The induction type display panel of signal.It further illustrates, such as present invention can apply to have silver paste to be coated with the capacitive films of demandSense (film sensor) touch panel.The circuit board 2 includes：One first induction channels 21 and one second induction channels 23.
First induction channels 21 its be set on the circuit board 2.First induction channels 21 penetrate one first connecting lineRoad 22 is connected to a sensor 25, and in this present embodiment, which is embedded in the circuit board 2.Wherein, thisOne connection line 22 is the good person of conductive effect, and the capacitance that the sensor 25 can be detected first induction channels 21In the memory for noting down the sensor 25, and the capacitance detected is changed into capacitance charge and discharge by the calculation function through insideThe number of electricity, to judge the capacitance variations of touch panel.
Second induction channels 23 its be set on the circuit board 2.Second induction channels 23 penetrate one second connecting lineRoad 24 is connected to the sensor 25, and in this present embodiment, which is embedded in the circuit board 2.Wherein, thisTwo connection lines 24 are the good person of conductive effect, and the capacitance that the sensor 25 can be detected second induction channels 23In the memory for noting down the sensor 25, and the capacitance detected is changed into capacitance charge and discharge by the calculation function through insideThe number of electricity, to judge the capacitance variations of touch panel.
The length of second connection line 24 is more than the length of first connection line 22, due to second induction channels 23Apart from the sensor 25 and first induction channels 21 apart from the sensor 25 farther out.Wherein, section of second connection line 24Area is more than the sectional area of first connection line 22.Present subject matter is to reduce difference through the mode for changing circuit sectional areaThe difference of resistance value between induction channels (first induction channels 21 and second induction channels 23).
Furthermore in order to increase the sectional area of second connection line 24, in when it is implemented, the present invention second connecting lineThe depth that road 24 is embedded in the circuit board 2 is embedded in the depth in the circuit board 2 more than first connecting line.Preferably, shouldThe sectional area of second connection line 24 is gradually big towards 23 direction of the second induction channels, such as second connection line 24 is embeddedDepth in the circuit board 2 is gradually deep towards 23 direction of the second induction channels.
It is designed by above-mentioned structure, composition, hereby being described as follows using start situation with regard to the present invention：Please refer to figureShown in 5, illustrate that the ratio of the second connection line different depth ratio and resistance value difference, the reference that can be used as resistance value demand are setEvaluation.The present invention can reduce resistance value through the circuit design of gradually deep formula, reach reduce first induction channels 21 and thisThe drop of resistance value between two induction channels 23, the first induction channels 21 (channel 1), 23 (channel of the second induction channelsN, New) and the n-th induction channels of the prior art (channel n, Old) resistance value calculate it is as follows：
By above formula it is known that in the circuit design of the present invention, when end point depth is starting point depth twice, circuitResistance value is reduced to the 69% of the n-th induction channels of the prior art (even depth T circuits).Fig. 5 is different depth ratio and resistance value differenceDifferent ratio can be used as the Reference Design value of resistance value demand.
Therefore please refer to shown in whole attached drawings, there are following advantages really in use, being compared with located by prior art in the present invention：ThisThe line construction of invention touch panel penetrates the sectional area of change circuit to reduce resistance value difference between different induction channels.
Only, the foregoing is merely the preferred embodiments of the invention, the scope of the claims that is non-therefore arresting the limit present invention, thereforeSuch as simply modification and the equivalent structure variation for it of description of the invention and schema content institute is used, this hair should all be similarly contained inIn bright the scope of the claims, Chen Ming is given in conjunction.