CN101813988B - Touch panel with improved electrode pattern - Google Patents

Abstract

The invention relates to a touch panel with an improved electrode pattern, which uses a discontinuous resistance chain to form a uniform electric field supply at the inner side of a series electrode chain of a conductive layer of the touch panel, wherein the discontinuous resistance chain is designed to enable the series electrode chain to achieve the effect of compensating voltage due to voltage drop generated by distance; the invention also applies a T-shaped homogenizing electrode chain which is formed at the inner side of the discontinuous resistance chain so as to achieve the purpose of homogenizing and outputting the voltage of the discontinuous resistance; furthermore, the invention also uses a second homogenizing electrode chain which is arranged in parallel with the bottom of the T-shaped homogenizing electrode so as to carry out secondary homogenization on the voltage output of the T-shaped homogenizing electrode. By the pattern configuration of the present invention, a relatively excellent average electric field distribution can be achieved.

Description

Touch panel with improved electrode pattern

technical field

The invention relates to a touch panel, in particular to a touch panel with an improved electrode pattern. the

Background technique

Currently, there are two types of mainstream touch panels on the market: resistive and capacitive. Among them, resistive type is divided into early four-wire resistive type and five-wire resistive type, six-wire or eight-wire resistive type, and capacitive type is divided into surface capacitive touch screen (SCT) and projected capacitive touch screen (ProjectiveCapacitance Touch Screen). Screen, PCT). Among them, the projected capacitive touch panel can also be called digital touch technology, and the resistive and surface capacitive touch panels can be called analog touch technology. the

Traditional analog touch technologies try to create a uniform equipotential electric field by patterning resistive elements around the edges. With the continuous development of touch technology and the continuous improvement of the requirements of related application products, the current technology is mostly focused on how to reduce the space occupied by the resistor components around the edge, and moreover, it is required to achieve a smoother edge equipotential field. The accuracy of the touch panel is improved, and the usable range is larger. the

Please refer to U.S. Patent Publication No. 6,593,916, which describes a touch sensitive screen with multiple parallel connections to each electrode in a series of resistor chains on the periphery of the touch sensitive area, which discloses two ways of using linear isolation regions To improve the potential "ripple" effect generated in the frame area, as shown in Figures 1A and 2A. Wherein, in the pattern of FIG. 1A, the series resistance chain is formed by series electrodes 40 formed on the conductive layer in series to form gaps 44. The spacing between the series electrodes 40 is S, which includes an external part and an internal part, as shown in FIG. The outer parts are 38, 41, 43, etc., while the inner part is 42. And its internal part is to adopt the mode of forming two insulating gaps 45 every two gaps 44, wherein one insulating gap 45 is located at the gap 44, and the interval of the insulating gap 45 has discontinuous resistance segment 46, and its length is slightly equal, The distance is S', and the equivalent resistance is shown in Figure 1B. the

In the pattern of FIG. 2A, the series resistance chain is formed by series electrodes 48, 50 formed on the conductive layer in series to form a gap 54. The distance between the series electrodes 48, 50 is S, which includes an outer part and an inner part. And its inner part is to take the mode that two insulating gaps 55 are formed at every two gaps 54 places, and each insulating gap 55 is all positioned at the inner part of series electrode, and the interval of insulating gap 55 has discontinuous resistance segment 56, and its length Slightly equal, the distance is S'. Its equivalent resistance is shown in Figure 2B. the

Next, please refer to US Patent Publication No. 2006/0119587, which discloses another improved electrode pattern, as shown in FIG. 3A . Wherein the series resistance chain 145 is formed by the series electrode 105 formed on the conductive layer in series to form a gap 125. The series electrode 105 includes an outer part 110 and an inner part 115, and the outer part 110 and the inner part 115 form a gap 120. . Its internal part adopts the method of forming two insulating gaps 130 at every two gaps 125, and there is a discontinuous resistance segment 145 between the insulating gaps 130, and its length is slightly equal, and the gap 125 of the series electrode 105 is designed in parallel. A conductive island 140 is inserted between the insulating gaps to improve the ripple effect. If the voltage of the discontinuous resistance segment 145 is V _N , V _N+1 , the voltage of the conductive island 140 in between can be averaged to (V _N +V _N+1 )/2, and its equivalent circuit is shown in FIG. 3B .

Although many manufacturers have invested in the research on the peripheral resistive element pattern of the touch panel, there is still much room for improvement in improving the equipotential electric field of the edge electrodes. the

Contents of the invention

In view of the problems of the above known technologies, the present invention proposes a touch panel with an improved electrode pattern, which can provide extremely narrow It can also obtain excellent linear accuracy in any area close to the edge of the line, and the error value is ≤1%. the

Another object of the present invention is to provide a touch panel with an improved electrode pattern, by closely combining the provided discontinuous resistance chain with the homogenizing electrode and the series electrode chain around the conductive layer to achieve the purpose of partially narrowing the frame In order to increase the touchable area within the same substrate area, thereby improving the flexibility of product collocation design. the

To achieve the above object, the present invention proposes a touch panel with improved electrode patterns, comprising: a substrate; a conductive layer formed on the substrate and having an internal contact area; a plurality of corner electrodes formed on the conductive layer the corners of the corners; a serial electrode chain, including a plurality of electrodes, formed on the edge of the conductive layer and connected to the corner electrodes, a rectangular electric field is formed when the corner electrodes are applied with a voltage, and each of the electrodes has a surface facing the corner electrodes. An inner part of the inner contact area, with a gap between adjacent electrodes; a discontinuous resistor chain, including a plurality of discontinuous resistors, formed on the conductive layer, electrically connected to the series electrode chain and formed in parallel arranged and formed to be isolated from the internal contact area, the internal portion of each of the electrodes of the series electrode chain is adjacent to at least one of the discontinuous resistors, and the gap is electrically connected to one of the discontinuous resistors; And, a first equalizing electrode chain, formed by a plurality of first equalizing electrodes at intervals, is formed on the edge of the discontinuous resistance chain close to the internal contact area, so as to make the output voltage of the discontinuous resistance uniform.

In addition, the touch panel may also include a second equalizing electrode chain, which is formed by a plurality of intervals between the second equalizing electrodes, which form the interval between every two first equalizing electrodes, so that the equalizing electrode chain The output voltage is more uniform. the

The length of the discontinuous resistance is calculated by the equation Y=aX ² +b to obtain a good compensation effect and equalize the equal pressure lines generated by the rectangular electric field, where X is the number of electrodes starting from the corner electrodes , b is the experimental default value, a is calculated from a preset line segment maximum value Ymax, and the line segment maximum value is determined by the length of the central electrode segment of the series electrode chain located at the two corner electrodes.

Wherein, the plurality of discontinuous insulating segments forming the discontinuous resistance chain are closely combined with the inner part of the series electrode chain and the edge of the homogenizing electrode chain. the

Description of drawings

FIG. 1A is the first example of a conductive frame electrode pattern used in a touch panel in the known technology;

Fig. 1B is the equivalent circuit of the conductive frame electrode pattern of Fig. 1A;

Fig. 2A is the second example of the conductive frame electrode pattern used in the touch panel in the known technology;

Fig. 2B is the equivalent circuit of the conductive frame electrode pattern of Fig. 2A;

FIG. 3A is a third example of a conductive frame electrode pattern used in a touch panel in the known technology;

Fig. 3B is the equivalent circuit of the conductive frame electrode pattern of Fig. 3A;

Fig. 4 is a layered diagram of the touch panel of the present invention;

Fig. 5 is the structural diagram of conductive layer 300 of the present invention;

Fig. 6 is the structural diagram of electrode frame layer 400 of the present invention;

Fig. 7 is a detailed structure diagram of the electrode frame layer 400 of Fig. 6;

Figure 8 is an enlarged view of the present invention after the electrode frame layer 400 is formed on the conductive layer 300; and

FIG. 9 is a second example of an enlarged view after the electrode frame layer 400 is formed on the conductive layer 300 according to the present invention. the

Symbol Description

38 External part 40 Series electrodes

41 External part 42 Internal part

43 External part 44 Clearance

45 Insulation gap 46 Discontinuous resistance section

S Spacing S’ Spacing

48 Series electrodes 50 Series electrodes

54 Clearance 55 Insulation clearance

56 Discontinuous resistance section 105 Series electrodes

110 External part 115 Internal part

120 Clearance 125 Clearance

130 insulation gap 140 conductive island

145 Discontinuous resistance segment V _N , V _N+1 voltage

200 Substrate 300 Conductive layer

311 Insulation part 312 Insulation part

313 Insulation part 314 Insulation part

321 Corner 322 Corner

323 Corner 324 Corner

331 Discontinuous resistance 400 Electrode frame layer

411 Corner Electrode 412 Corner Electrode

413 Corner Electrode 414 Corner Electrode

420 Series electrode chain 421 Interval

420-X _n-1 , Z-type electrode 420-X _n Z-type electrode

420-X _N+1 Z-shaped electrode 422 Gap

423 Gap 429 Central Electrode

430 Electrode chain 431 The first homogenizing electrode

432 Second homogenizing electrode 433 Interval

434 Interval D1 Interval

D1A Spacing D1B Spacing

Ymax Maximum Electrode Length L1 Length

L2 Length Length of L2A Length of T-shaped Bottom

L3 Length L4 Gap Distance

L5 Width T1 Thickness

T2 Thickness

Detailed ways

The present invention is a new design pattern and structure. When used in the detection of capacitive touch panels, it uses the tiny capacitance between the high-impedance transparent conductive film and the touch object (with a layer of thick-film transparent insulating material in the middle) , the touch coordinates of the touch object can be accurately detected. When used in the detection of the resistive touch panel, the touch coordinates of the touch object can be accurately detected by using the voltage level detected after the touch object touches the touch panel. the

First, please refer to FIG. 4 , which is a layered diagram of the touch panel of the present invention, which includes a basic electrode frame layer 400 , a conductive layer 300 and a substrate 200 . Wherein, the pattern of the electrode frame layer 400 can be printed on the conductive layer 300 by using an environmentally friendly lead-free high-temperature silver paste through a screen printing process. The silver metal is welded to the conductive layer 300 at a high temperature above 500° C., so that the resistance of the conduction interface therebetween is extremely small (which can be regarded as nearly zero resistance). It has high resistance to changes in ambient temperature. In addition, after the silver wire and the conductive layer 300 are crystallized at high temperature, the chemical resistance can be significantly improved. In addition, other metals other than silver wires, such as molybdenum/aluminum/molybdenum metal layers, chromium, or other metals with better conductivity can also be used. In addition, the conductive layer 300 can use one with higher impedance, so that it has the effect of less energy consumption and less current flow. the

Structurally, the substrate 200 can be made of a glass substrate, and the conductive layer 300 is fabricated by means such as sputtering, and the pattern on the conductive layer 300 is produced by etching or laser. Next, a pattern of high temperature silver paste is printed to form the electrode frame layer 400 . In addition, the substrate 200 can also be made of other materials, for example, a flexible substrate, and the electrode pattern can be made by using a process suitable for a flexible substrate. the

Next, please refer to FIG. 5, which is a structural diagram of the conductive layer 300 of the present invention, wherein the black areas are the insulating parts 311, 312, 313, 314 distributed around the conductive layer, and the X-axis are the insulating parts 312, 314 , the ones along the Y axis are insulating parts 311 and 313 . The insulating parts 311, 312, 313, 314 are made by etching or laser, and their function is to isolate the electrode layers of the electrode frame layer 400, and those not etched into insulating parts will form a conductive discontinuous resistance chain. To form the average voltage level of each electrode output port to form a uniformly distributed equipotential electric field. Wherein, the length of the unetched discontinuous resistance chain is calculated according to the formula Y=aX ² +b, so as to form the non-uniformly distributed insulating parts as shown in FIG. 5 . The detailed parameter acquisition method will be explained later.

In addition, in the four corners 321 , 322 , 323 , 324 of the conductive layer 300 , there are four corner electrodes. the

Next, please refer to FIG. 6, which is a structural diagram of the electrode frame layer 400 of the present invention, which includes four corner electrodes 411, 412, 413, 414, and a serial electrode chain 420 connected in series with the four corner electrodes, and finally , there is also a group of electrode chains 430 forming a first separation distance ( D1 ) from the serial electrode chains 420 . Wherein, in the embodiment of FIG. 6 , the series electrode chain 420 is a structure in which the outer part and the inner part are overlapped by a plurality of Z-shaped electrodes, and a fixed gap is formed between each electrode, as a follow-up series resistance. form space. Therefore, when the electrode frame layer 400 is formed on the conductive layer 300 , the fixed gap between the electrodes of the series electrode chain 420 constitutes a series resistor chain, so that the voltage transmitted from the corner electrodes provides a series voltage supply. The electrode chain 430 can further subdivide the voltage supplied by the series electrode chain 420 into finer voltage distributions. the

Among them, the series resistance chain can have other structures, such as S-like, fork-shaped, continuous segment and other design methods, which are suitable for continuous distribution of voltage. The number of Z-shaped electrodes in the series electrode chain 420 can be designed according to the size of the touch panel, and the panel size can be designed as 3, 5, 7, 9, 11, 13, 15, 17,...(2n+1), n>1 and other different numbers of electrodes. For example, Fig. 6 is an embodiment of 9 Z-shaped electrodes. Wherein, the central electrode section is composed of two Z-shaped electrodes reversely connected, and its length is Ymax. From left to right, there are Y1, Y2, Y3, Y4, Y5 electrodes, and so on. the

Since the input voltage of the series electrode chain is transmitted from the corner electrodes, it will form a voltage drop phenomenon at each Z-shaped electrode after passing through the series resistance chain. In order to provide a uniform electric field distribution on the conductive layer 300, the present invention generates non-uniform resistance through the discontinuous resistance chain generated by the insulating parts 311, 312, 313, 314 on the conductive layer 300, and through the distance from the corner electrode More recently, the basic principle of larger resistance is given to design the resistance value of the discontinuous resistance chain. Therefore, the voltage value transmitted through the series resistance chain will be compensated by the discontinuous resistance chain, so as to form a uniform voltage supply. the

However, the voltage value supplied by the discontinuous resistor chain will have poor marginality in voltage distribution due to the different lengths of the resistor segments of the discontinuous resistor chain. Therefore, in addition to the design of the discontinuous resistor chain, the present invention also provides the design of the electrode chain 430 so that the voltage supply can be fully uniformed. The electrode chain 430 is disposed on the inner layer of the discontinuous resistance chain after the electrode frame layer 400 is formed on the conductive layer 300 , that is, the discontinuous resistance chain is disposed between the series electrode chain 420 and the electrode chain 430 . Therefore, through the voltage supply of the discontinuous resistor chain and the voltage uniformization of the electrode chain 430 , the present invention can provide a touch panel with excellent electric field uniformity, and the error range is within 1% according to the actual measurement results. the

4 to 6 illustrate the electrode structure of the present invention with the overall structure. Next, the improved electrode pattern of the present invention will be described with detailed structure diagrams. the

Please refer to FIG. 7 , which is a detailed structure diagram of the electrode frame layer 400 in FIG. 6 . Four Z-shaped electrodes are shown in the figure, of which, two are intact (the segment length is L1), and two are fragmented. Z-type electrodes 420-X _n-1 , 420-X _n , 420-X _N+1 can provide voltage distribution of V _N-1 , V _N , V _N+1 respectively, and the electrode chain 430 can provide a finer voltage distribution. The inner part of the Z-shaped electrode and the gap D1 formed by the electrode chain 430, its distance end depends on the physical characteristics of the conductive layer 300, and it is to form the required discontinuous resistance chain. Therefore, by the formula R=ρL/ A, the required D1 value can be calculated. Among them, R is the resistance value of the two ends of the wire, ρ is the conductivity of the wire, A is the cross-sectional area of the wire, and L is the length of the wire. Meanwhile, the gap D1 is where the discontinuous resistance chain is formed, which will be described later.

There are horizontal intervals 421 and vertical intervals 422 between the Z-shaped electrodes, so that a series resistance is formed between the Z-shaped electrodes, thereby forming a series resistance chain. The thickness of the Z-type electrode is T1, and the specific thickness design depends on the manufacturing technology. In principle, the thinner the thickness T1 of the Z-shaped electrode, the better, so as to reduce the size of the frame and make the touchable area of the touch panel larger. the

The electrode chain 430 includes a first homogenizing electrode 431 and a second homogenizing electrode 432 . Wherein, the length of the first homogenizing electrode 431 is L2, the thickness is T2, and the width of the interval 434 is L5, and the first homogenizing electrode 431 can be a T-shaped structure, and the length of the T-shaped bottom is L2A, and the thickness is L2A. It is better to be parallel to the second equalizing electrode 432 . The length of the second homogenizing electrode 432 is L3 , and the distance between the first homogenizing electrode 431 and the second homogenizing electrode 432 is 433 . Among them, the best one is that the length L2A of the T-shaped bottom of the first homogenizing electrode 431 is equal to the length L3 of the second homogenizing electrode 432, and the edge of the T-shaped bottom of the first homogenizing electrode 431 is equal to the length L3 of the second homogenizing electrode 432. The gap distance L4 formed by the edge is preferably 2/3 of the length of the second homogenizing electrode 432, and other ratios are also possible, such as 1/5, 1/4, 1/3, 1/2, 2/ 5, 2/7, 3/5, 3/7, 4/5, .... Actual testing can be used to determine which achieves the best electric field uniformity. the

On the inner edge of the Z-shaped electrode of the series electrode chain 420, a plurality of first homogenizing electrodes 431 (constituting the first homogenizing electrode chain) and a plurality of second homogenizing electrodes 432 of the homogenizing electrode chain 430 ( constitute the second homogenizing electrode chain), as shown in FIG. 7 . When the electrode chain 430 is formed on the conductive layer 300 , the intervals 433 , 434 between the first equalizing electrode chain and the second equalizing electrode chain constitute the resistance structure on the conductive layer 300 . Since the first homogenizing electrode chain and the second homogenizing electrode chain are evenly distributed, the voltage transmitted through the Z-shaped electrode and then through the discontinuous resistance chain can be uniformly distributed again. That is, the electrode chain 430 can distribute the electric field finally transmitted to the touch area of the conductive layer 300 more evenly. the

The production quantity of the first homogenizing electrode chain and the second homogenizing electrode chain on the inner edge of each Z-shaped electrode, in addition to the two groups in Figure 7, can be matched in different quantities depending on the production skills. For example, you can It can be made into 3 sets, 4 sets, 5 sets...it is all right. Such a configuration needs to be considered together with the design of the discontinuous resistance chain on the conductive layer 300 . That is to say, the position of each first equalizing electrode 431 is configured in a discontinuous resistance segment, which serves as a medium for voltage transmission. After the second homogenizing electrode 432, the voltage can be configured in a more detailed manner, for example, the third homogenizing electrode can be made to perform homogenization again. the

Next, please refer to FIG. 8 , which is an enlarged view after the electrode frame layer 400 is formed on the conductive layer 300 . It can be clearly observed from the figure that the discontinuous resistor 331 is formed between the insulating part 311, the Z-shaped electrode and the first homogenizing electrode 431, which forms a resistor through the conductive layer 300 and also forms a conductive part of the Z-shaped electrode. Moreover, the discontinuous resistor 331 is seamlessly connected with the Z-shaped electrode and the first homogenizing electrode. It can be clearly seen from the figure that the inner part of each Z-shaped electrode has a section of the discontinuous resistor 331 ; and the center of the vertical part of the Z-shaped electrode corresponds to a section of the discontinuous resistor 331 . Therefore, the first homogenizing electrode 431 can conduct the voltage of the Z-shaped electrode through the discontinuous resistor 331 and homogenize it, and then pass the voltage of the first homogenizing electrode 431 through the second homogenizing electrode 432 for a second time. average. Since the second equalizing electrode 432 is arranged in parallel with the T-shaped bottom of the first equalizing electrode 431, the voltage of the first equalizing electrode 431 and the voltage of the second equalizing electrode 432 can be uniformly output to the conductive layer 300 . the

In addition, since the discontinuous resistance chain provides different resistances to the Z-shaped electrodes as voltage outlets for voltage compensation, the output voltage of each Z-shaped electrode through the discontinuous resistance segment will be consistent. After the electric field is averaged by the electrode chain 430, a fairly uniform distribution of the fringe electric field can be obtained, which can effectively reduce the ripple effect of the fringe electric field. the

Wherein, the length of the discontinuous resistor 331 is calculated according to the formula Y=aX ² +b. The calculation method is explained as follows:

1.X is the number of Z-shaped electrodes counted from the corner electrodes, for example, starting from the corner electrodes 411, there are X1=1, X2=2, X3=3, X4=4, X5=5, 5 Z-shaped electrodes . the

2.b is the default value, which is obtained from experiments and statistics, and the best one is between 0.3 and 2.0 mm. the

3. a is calculated from Ymax, and the size of Ymax can be obtained from the length of the central electrode 429 at the top of FIG. 6 . As for the length of the central electrode, it is evaluated by the size of the panel and the number of serial electrode chains. The better Ymax is the length of the electrode minus 0.1 mm from the left and right sides. the

4. From the Ymax, b value and X value, the a value parameter can be obtained. the

Therefore, the length of Y _n-1 is calculated by Y _n-1 =a(n-1) ² +b, and the length of Y _n is calculated by Y _n =a(n) ² +b. And the length of Y _n-0.5 between Y _n-1 and Y _n can be calculated in two ways: IX=(X _n-1 +X _n )/2, then substitute into the formula; II. with Y=( Y _n-1 +Y _n )/2. For the actual effect, the first formula is better.

Wherein, the optimum position of the discontinuous resistance 331 is to be the center YC1 of the vertical section of the Z-shaped electrode and the center YC2 of its internal part (the center of the center of the two vertical sections), and the center of the first equalizing electrode corresponds to the discontinuous The center of the resistor will do. Of course, some deviations in manufacturing, or non-central configurations during design, are also provided by the present invention, and all of them can achieve the intended effect of the present invention. the

In addition, in practice, a design method of distributing multiple discontinuous resistors to the inner part of the Z-shaped electrode can also be adopted. In other words, in the present invention, a discontinuous resistor is arranged between each electrode of the series electrode chain, and more than one discontinuous resistor can be arranged in the inner part of each electrode. In addition, each discontinuous electrode may be configured with more than one first homogenizing electrode, and between the first homogenizing electrodes, more than one second homogenizing electrode may be configured. That is to say, discontinuous resistance, the number configuration of the first homogenizing electrode or the second homogenizing electrode is aimed at achieving the problem of electric field homogenization to be solved by the present invention, which can be achieved according to the accuracy and cost of the production equipment as the main consideration. the

If the internal part of the electrode of each series electrode is designed in the form of multiple discontinuous resistances, that is, at the center YC1 of the vertical section of the two Z-shaped electrodes (if other electrode structures are used, it is the electrode between the electrodes The internal part) is configured with multiple discontinuous resistors, then the calculation of the length of the discontinuous resistors disposed therebetween can also be obtained by using the above two calculation methods. For example, when two discontinuous resistors are used to configure the inner part of the Z-shaped electrode, the preferred one is to be equidistant from the discontinuous resistors on both sides, such as between Y _n-1 and Y _n , respectively _Yn-0.67 , _Yn-0.33 . And Y _n-0.67 ＝a(n-0.67) ² +b, Y _n-0.33 ＝a(n-0.33) ² +b; or, Y _n-0.67 ＝(Y _n-1 *2+Y _n * 1)/3 with Y _n-0.33 = (Y _n-1 *1+Y _n *2)/3. Among them, the effect of the former is better.

In addition, discontinuous resistance obtained by different calculation methods can also be used in the present invention. Good uniform voltage distribution can be formed only through the first homogenizing electrode of the present invention, or through the combination of the first homogenizing electrode and the second homogenizing electrode of the present invention. The Z-shaped electrode is only an embodiment of the present invention, and other shapes of different series electrode chains can also be used as embodiments of the present invention. Since the principles are the same, they will not be described in detail below. the

Therefore, through the pattern design of the electrode frame layer 400 and the conductive layer 300 of the present invention, the resistance values between the corner electrodes 411, 412, 413, 414 can be averaged. Therefore, even if the voltage equipotential lines in the X-axis are near the edge of the line, they can still obtain excellent parallel line distribution; similarly, the voltage equipotential lines in the Y-axis can also obtain excellent parallel line distribution. the

The embodiment of FIG. 8 illustrates that the insulating part 311 constituting the discontinuous resistor 331 is formed between the inner part of the series electrode chain 420 and the first series electrode chain 431, and the insulating part 311 is connected to the series electrode chain 420 and the first series electrode chain 431. The series electrode chains 431 are closely connected to form a good insulation relationship. Such a structure can effectively provide the voltage of the Z-shaped electrodes to the first serial electrode chain 431 accurately. the

However, during manufacturing, process deviations inevitably occur, so that the insulating portion 311 cannot be accurately formed between the inner part of the series electrode chain 420 and the first series electrode chain 431 . From the perspective of product use, if such products can meet the requirements of customers, they can still be classified as good products. the

Please refer to FIG. 9 , which is a second example of an enlarged view after the electrode frame layer 400 is formed on the conductive layer 300 . The insulating part 311 of the discontinuous resistor 331 is formed between the inner part of the series electrode chain 420 and the first series electrode chain 431, and the insulating part 311 forms a distance D1A from the series electrode chain 420, and is connected to the first series electrode chain. 431 form a distance D1B. Such a structure can still achieve an effective uniform distribution of the electric field. the

Although the technical content of the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention, and any changes and modifications made by those skilled in the art without departing from the spirit of the present invention should be included in the present invention. Within the scope of the present invention, therefore the scope of protection of the present invention should be based on the content defined by the claims of the present invention. the

Claims (10)

1. the contact panel with improved electrode pattern is characterized in that, comprises:

One substrate;

One conductive layer is formed on this substrate, has an inner contact region;

A plurality of corners electrode is formed at the corner of this conductive layer;

One series connection electrode chains; Include a plurality of electrodes, be formed at the edge of this conductive layer and be connected, form a rectangle electric field in those corners during the electrode impressed voltage with those corner electrodes; Each this electrode has the interior section in the face of this contact region, inside, has a gap between those adjacent electrodes;

One discrete resistance chain; Comprise a plurality of discrete resistances; Be formed on this conductive layer; Arrange with this series connection electrode chains electric parallel and be connected, this interior section of each this electrode of said series connection electrode chains is adjacent with at least one this discrete resistance, and this gap is electrically connected with this discrete resistance formation; And

One first homogenizing electrode chains is formed by a plurality of first homogenizing electrode gap, is positioned at the edge of this discrete resistance chain near this contact region, inside, with the output voltage of this discrete resistance of homogenising.

2. the contact panel with improved electrode pattern as claimed in claim 1; It is characterized in that, also comprise one second homogenizing electrode chains, form by a plurality of second homogenizing electrode gap; Be positioned at the interval of per two these first equal polarizing electrodes, with the output voltage of this first homogenizing electrode chains of homogenising.

3. the contact panel with improved electrode pattern as claimed in claim 2; It is characterized in that; This first equal polarizing electrode is to include a cross bar portion and a straight-bar portion, and this second equal polarizing electrode is line style and is arranged in parallel with the straight-bar portion bottom of this first equal polarizing electrode and forms a spacing.

4. said contact panel as claimed in claim 2 with improved electrode pattern; It is characterized in that, also comprise one the 3rd homogenizing electrode chains, form by a plurality of the 3rd homogenizing electrode gap; Be positioned at the interval of per two these second equal polarizing electrodes, with the output voltage of this second homogenizing electrode chains of homogenising.

5. the contact panel with improved electrode pattern as claimed in claim 1; It is characterized in that; This discrete resistance chain is to be formed on this conductive layer by a plurality of discontinuous insulation sections to constitute, and this discontinuous insulation section is connect with this this interior section and this first homogenizing electrode chains seamless arrangement of electrode chains.

6. the contact panel with improved electrode pattern as claimed in claim 1; It is characterized in that; This interior section of each this electrode is adjacent with at least one this discrete resistance, and this gap forms with this discrete resistance and be electrically connected, and the length Y of this discrete resistance equals aX ²+ b, wherein, this a, b value are constant, this X value is the value that equals to be started at by this corner electrode that is connected with this series connection electrode chains this number of electrodes.

7. the contact panel with improved electrode pattern as claimed in claim 6 is characterized in that, this a value is that this a value equals (Ymax-b)/X by the length Ymax decision of a contre electrode section of these series connection electrode chains central authorities ²

8. the contact panel with improved electrode pattern as claimed in claim 6 is characterized in that, this a value is that the length Ymax by a contre electrode section of this series connection electrode chains central authorities subtracts 0.2 millimeter decision, and this a value equals ((Ymax-0.2)-b)/X ²

9. the contact panel with improved electrode pattern as claimed in claim 6; It is characterized in that, also comprise one second homogenizing electrode chains, form by a plurality of second homogenizing electrode gap; Be positioned at the interval of per two these first equal polarizing electrodes, with the output voltage of this first homogenizing electrode chains of homogenising.

10. the contact panel with improved electrode pattern as claimed in claim 9; It is characterized in that; This first equal polarizing electrode is to include a cross bar portion and a straight-bar portion, and this second equal polarizing electrode is line style and is arranged in parallel with the straight-bar portion bottom of this first equal polarizing electrode and forms a spacing.

Images