KR20130111022A - Touch panel having electrode pattern for compensating resistance - Google Patents

Abstract

PURPOSE: A touch panel having a resistance-compensating electrode pattern is provided to guarantee the stable operation of a touch panel by preventing errors due to the difference in the resistance values of bezel electrode lines. CONSTITUTION: In order to connect X/Y-axis electrode lines of a touch sensor to the driving circuit of a touch panel, bezel electrode lines (110a-110n) are formed in the bezel of the touch panel corresponding to the X or Y-axis electrode lines. The length of bezel electrode lines outside the bezel is longer than bezel electrode lines inside the bezel. The bezel electrode lines correspond to and are connected to the X or Y-axis electrode lines respectively. The size of the cross section of the bezel electrode lines increases proportionally to the length.

Description

Touch panel having electrode pattern for compensating resistance

The present invention relates to a touch panel having a resistance compensation electrode pattern, and more particularly, resistance of bezel electrode lines formed on the edge bezel of the touch panel to electrically connect the electrode line of the touch sensor and the driving circuit on the touch panel. The present invention relates to a touch panel having a bezel electrode line formed of an electrode pattern having a resistance compensation structure so as to be at the same level.

In recent years, touchscreens have become much more than user interfaces. The touch interface technology is not a new technology, but has been applied to existing display products such as navigation and unattended ATM devices of banks, POS used in general stores such as marts and restaurants.

The use of touch in these products was an interface that enables instant and simple input without a keyboard or mouse. The biggest advantage was that all ages can input without inconvenience. Of course, we focused on a simple feature called On / Off. With the addition of multi-touch and soft touch to a simple touch screen, Apple's application to mobile phones brings touch technology to a new turnaround. As the display screen is easily enlarged and reduced while the multi-touch function is added, the usability of the mobile phone is improved. In addition, the application is easy to use, and the soft touch technology is combined with the emotional function to recognize and express the user's behavior.

The touch panel technology most commonly used in mobile phones is a projected capacitive. A projected capacitive touch panel generally includes a transparent conductive film having an X-axis sensing electrode and a Y-axis sensing electrode. The formed transparent conductive film is bonded to an OCA (Optically Clear Adhesive) film to manufacture a touch panel, and the manufactured touch panel is attached to a window substrate for mobile to commercialize.

1 shows a schematic diagram of a projected capacitive touch module.

Projection capacitive touch panels use two or three conductive transparent conductive films, and two are used to recognize the coordinates of X and Y, and one is used to remove noise, which is particularly generated in mobile products.

Figure 2 shows the pattern of the projection capacitance method commonly used.

The pattern of the touch sensor is generally formed in a rhombus shape, but may be manufactured in various shapes. In FIG. 2, the rhombus-shaped X-axis sensor 21 and the Y-axis sensor 23 cross each other while the touch sensor 20 is formed. The patterns are arranged in a grid spaced apart at regular intervals to form a touch panel.

The projected capacitive touch panel manufactured as described above includes a driving chip and an algorithm in the controller 30 to detect and operate a change in the amount of fine charge when the user's hand contacts the touch panel.

The touch sensor 20 and the controller 30 are connected through a bezel electrode line 10 formed at an edge bezel of the touch panel, and FIG. 2 illustrates an upper surface of the touch panel, and includes a plurality of bezel electrode lines 11a. .11n) are sequentially connected to the electrode lines of the X-axis sensor 21, respectively, and although not shown in FIG. 2, a plurality of bezel electrode lines are formed on the bottom surface of the touch panel of the Y-axis sensor 20. Corresponding to each of the electrode lines are sequentially connected.

Here, the bezel electrode lines 10 are all formed in the same shape regardless of the length or resistance value of each electrode line. As a result, as shown in FIG. 2, the bezel electrode lines 10 are different from each other according to their lengths. In particular, the difference in the relative length between the bezel electrode line 11a connected to the sensor at the lower end of the touch panel and the bezel electrode line 11n connected to the sensor at the upper end of the touch panel is largely generated. The difference is also large.

The difference in resistance of each of the bezel electrode lines is a problem in accurately transmitting the capacitance change of the touch sensor. In particular, when it is necessary to detect minute changes such as proximity sensing, the difference in the resistance value of the bezel electrode lines may cause problems. An error occurs and the driving of the stable touch panel cannot be guaranteed.

The present invention is to solve the problems of the prior art as described above, to eliminate the problem caused by the difference in the resistance value of the bezel electrode line electrically connecting between the electrode line of the touch sensor and the touch driving circuit in the touch panel. .

In particular, the present invention provides a touch panel capable of ensuring stable driving of a touch panel by compensating resistance values between bezel electrode lines to a similar level and eliminating errors in the touch panel caused by differences in resistance values of the bezel electrode lines.

The present invention to achieve the above technical problem, in the touch panel, the X-axis electrode line or Y-axis to electrically connect the X-axis electrode line or Y-axis electrode line of the touch sensor of the touch panel with the drive circuit of the touch panel. And a plurality of bezel electrode lines formed on the bezel of the touch panel corresponding to the electrode lines, wherein the plurality of bezel electrode lines have a length of the bezel electrode lines located outside the bezel electrode lines located inside the bezel. The touch panel is lengthened and sequentially connected to the X-axis electrode line or the Y-axis electrode line one by one, and the cross-sectional area thereof is increased in proportion to the length to compensate for the resistance of the electrode line.

Preferably, the bezel electrode line may be formed by extending its cross-sectional area onto an upper empty space of an adjacent bezel electrode line having a shorter length than the bezel electrode line.

More preferably, the bezel electrode line connected to the Y-axis electrode line may have an electrode pattern portion having a Y-axis extending in a longitudinal direction thereof and an enlarged cross-sectional area thereof on an upper empty space of the adjacent bezel electrode line.

Further, the plurality of bezel electrode lines are formed, and among the N bezel electrode lines, an electrode pattern portion having a Y-axis in the longitudinal direction of the k-th bezel electrode line sequentially from the outside of the bezel to the inside is k-1. The same height as the first bezel electrode line may be formed in the same electrode pattern shape, and a cross-sectional area thereof may be expanded by N / k times on the upper empty space of the k−1 th bezel electrode line.

Here, each of the N bezel electrode lines is formed to have a resistance value of the following [Formula 1],

[식 1]

[Formula 1]

Here, k may represent the order of N bezel electrode lines sequentially formed from the outside of the bezel to the inside, and R ₁ may represent a resistance value when the order is 1.

Preferably, the bezel electrode line may be formed by connecting a rectangular pattern in which the area of the electrode pattern formed in the longitudinal direction of the Y axis toward the bottom of the Y axis is reduced in multiple stages.

Alternatively, the bezel electrode line may be formed in a curved shape in which the width of the electrode pattern portion having the Y axis extending in the longitudinal direction toward the bottom of the Y axis becomes narrower.

According to the present invention, by compensating the resistance value of the plurality of bezel electrode lines for electrically connecting between the electrode line of the touch sensor and the touch driving circuit in the touch panel to a similar level to each other generated by the difference in the resistance value of the bezel electrode line By eliminating errors in the touch panel, it is possible to ensure stable driving of the touch panel.

1 shows a schematic diagram of a projected capacitive touch module,
2 shows a shape of a rhombus pattern of a commonly used projected capacitive type,
3 illustrates a portion of a bezel electrode line connected to an X-axis touch sensor of a projected capacitive touch module as a first embodiment according to the present invention.
4 is a conceptual diagram illustrating a resistance value of a bezel electrode line according to the related art and a resistance value of a first embodiment according to the present invention shown in FIG. 3,
FIG. 5 illustrates a portion of a bezel electrode line connected to an X-axis touch sensor of a projected capacitive touch module as a second embodiment according to the present invention.
FIG. 6 illustrates a portion of the bezel electrode line connected to the X-axis touch sensor of the projected capacitive touch module as the third embodiment according to the present invention.

In order to explain the present invention, the advantages of the configuration of the present invention and the object achieved by the practice of the present invention will be described below with reference to the preferred embodiments of the present invention.

First, the terminology used in the present application is used only to describe a specific embodiment, and is not intended to limit the present invention, and the singular expressions may include plural expressions unless the context clearly indicates otherwise. Also, in this application, the terms "comprise", "having", and the like are intended to specify that there are stated features, integers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention is formed by the electrode pattern of the resistance compensation structure so that the resistance of the bezel electrode lines formed on the edge bezel of the touch panel to the same level to electrically connect the electrode line of the touch sensor and the driving circuit on the touch panel. A touch panel having a bezel electrode line is disclosed.

As described above with reference to FIG. 2, the touch panel according to the present invention also electrically connects the X-axis electrode line or the Y-axis electrode line of the touch sensor with the driving circuit of the touch panel. In response to the plurality of bezel electrode lines are formed on the bezel of the touch panel. A characteristic configuration of the present invention is a pattern of bezel electrode lines, wherein the plurality of bezel electrode lines sequentially extend the X axis while the length of the bezel electrode lines located outside the bezel electrode lines located inside the bezel is longer. The bezel electrode lines are connected to one another in correspondence with the electrode lines or the Y-axis electrode lines, wherein the bezel electrode lines are formed in such a manner that the cross-sectional area of the electrode lines is increased in proportion to their lengths, so that the resistance values of the plurality of bezel electrode lines are all similar. Is optimized to the level.

FIG. 3 illustrates a portion of the bezel electrode line connected to the X-axis touch sensor of the projected capacitive touch module as the first embodiment according to the present invention. The part may be known by applying the part shown in FIG. 3 to FIG. 2.

In FIG. 3, as an embodiment of the bezel electrode line 100a connected to the X-axis touch sensor 210 of the touch sensor 200, the bezel electrode line 100a of the bezel electrode line 100a will be described more clearly. The enlarged portion is illustrated and it should be considered that the width of the bezel electrode lines is in the range of several hundreds to several tens of um. In addition, the number of bezel electrode lines to be formed depends on the size of the touch panel and the number of touch sensors to be formed.

When the plurality of bezel electrode lines 110a, 110b,..., 100n are formed as in the first embodiment of the present invention illustrated in FIG. 3, the bezel electrode lines 110a, 110b, In order to distinguish ..., 100n, the bezel electrode line 110n formed at the outermost side of the bezel is set to the order 1, and the bezel electrode line 110a formed at the innermost side of the bezel is set to the order N, from this. Shall be.

In the present invention, the bezel electrode line is formed by extending a cross-sectional area onto an upper empty space of an adjacent bezel electrode line having a shorter length than that of the bezel electrode line 110a and the N-1 th bezel electrode line ( Referring to 110b), the electrode line pattern of the N-1th bezel electrode line 110b is extended to an upper empty space of the Nth bezel electrode line 110a and connected to the corresponding X-axis sensor.

In contrast to the prior art illustrated in FIG. 2, in the conventional art, the bezel electrode 10 connected to the X-axis sensor 23 extends in a straight line without changing width at the same height as the corresponding X-axis sensor. Although bent at a right angle, the present invention is connected to the X-axis touch sensor located at the lower side relative to the Y-axis to form a pattern of the bezel electrode line 100a by utilizing the empty space on the bezel of the touch panel to the maximum. The electrode pattern of the adjacent bezel electrode line 110b is expanded by utilizing the upper space of the bezel electrode line 110a in which the empty space is generated, and the area of the electrode pattern extending toward the upper portion becomes larger. For example, the first bezel electrode line 110n positioned at the top and the second bezel electrode line at the bottom thereof are more clearly illustrated in that the electrode pattern is expanded.

In more detail, for the N bezel electrode lines 100a, the electrode patterns in the Y-axis length direction may be divided into N layers. In the first embodiment of FIG. 3, the entire area occupied by each layer may be equal. Although formed, it may have a different area for each layer in order to make a more optimal compensation resistance value.

In FIG. 3, all bezel electrode lines 110a and 110n are formed in the first layer, which is the lowest end, to form N electrode patterns, and in the second layer, the Nth bezel electrode line 110a is excluded. Since the bezel electrode lines 110b,... 110n from the N-1 th to the N th are formed, N-1 electrode patterns are formed. In this order, the first and second bezel electrode lines occupy the area of the N-1 layer, and two electrode patterns are formed, and only the first bezel electrode 110a is formed on the Nth layer. .

That is, a rectangular pattern in which the area of the bezel electrode line is formed in the longitudinal direction of the Y-axis in the longitudinal direction from the upper portion of the Y-axis toward the lower side is formed by connecting a plurality of square patterns.

In the present invention, by presenting the pattern shape of the bezel electrode line, the resistance value of the plurality of bezel electrode lines is adjusted to a similar level to achieve the resistance compensation of the bezel electrode line as a whole. A conceptual diagram of the resistance value of the bezel electrode line and the resistance value of the first embodiment according to the present invention shown in FIG. 3 is shown.

FIG. 4A illustrates an electrode pattern portion in a Y-axis longitudinal direction of N bezel electrode lines 10 according to the prior art, and FIG. 4B is a third embodiment of FIG. 3 according to the present invention. In one embodiment, the electrode pattern portions in the Y-axis longitudinal direction of the N bezel electrode lines 100a are illustrated.

In general, the resistance R of the conductive wire can be represented by the following [formula 2].

[식 2]

[Formula 2]

Where l is the length and S is the cross-sectional area, and the resistance value R of the lead is proportional to its length l and inversely proportional to its cross-sectional area S.

In FIG. 4A, since each bezel electrode line extends only in the longitudinal direction and there is no change in width, when the resistance value of the first bezel electrode line 11a is R ₁ , the second bezel electrode line 11b ) Is 2R ₁ , and the resistance of the last N-th bezel electrode line 11n becomes NR ₁ , so that the difference between the resistance of the first-bezel electrode line 11b and the resistance of the N-th bezel electrode line is different. It occurs quite a bit.

이 되며, 최상단부의 1번째 베젤 전극 라인(110n)은 모든 층의 사각형 패턴을 모두 합산한 값이 되므로 그 값을 계산하면

이 된다. In FIG. 4B, as described above with reference to FIG. 3, the bezel electrode line has a rectangular pattern in which the area of the electrode pattern in the Y-axis longitudinal direction divided into N layers is reduced from the upper side to the lower side of the Y-axis. When the resistance value of the N-th bezel electrode line 110a at the lowermost end is R ₁ , the resistance value of the N-th bezel electrode line 110b is

Since the first bezel electrode line 110n at the uppermost end is a sum of all square patterns of all layers, the value is calculated.

.

As described above, according to the present invention, the electrode pattern portion having the Y axis of the k-th bezel electrode line sequentially in the sequential order from the outside of the bezel to the inside of the N bezel electrode lines is the same height up to the same height as the k-1 bezel electrode line. It is formed in the form of an electrode pattern, the cross-sectional area is expanded by N / k times on the upper empty space of the k-1 bezel electrode line, the resistance value of the k-bezel electrode line can be expressed by the following [Equation 1].

[식 1]

[Formula 1]

Compared to the bezel electrode line according to the prior art, the bezel electrode line according to the present invention has almost no difference in resistance value in the bezel electrode line of the lower end portion having a shorter electrode pattern formed in the Y-axis in the longitudinal direction, but the Y-axis in the longitudinal direction. It can be seen that the resistance value is significantly compensated in the bezel electrode line of the upper end portion of which the formed electrode pattern portion is long.

The bezel electrode lines of the touch panel according to the present invention may be formed in various patterns in addition to the pattern shown in the first embodiment of FIG. 3. Of the various embodiments, FIG. 5 is a second embodiment according to the present invention. A portion of the bezel electrode line connected to the X-axis touch sensor of the projected capacitive touch module is shown.

The second embodiment of FIG. 5 is a modified form of the first embodiment of FIG. 3, wherein the bezel electrode lines 100b are curved, and the electrode patterns formed on the Y axis of the bezel electrode lines 100b in the longitudinal direction. The portion is formed in a curved shape that becomes narrower from the top to the bottom of the Y axis.

As yet another embodiment, FIG. 6 shows a portion of the bezel electrode line connected to the X-axis touch sensor of the projected capacitive touch module as the third embodiment according to the present invention.

In the third embodiment of FIG. 6, the bezel electrode line 100c is a pattern in which a cross-sectional area is extended at a height connected to the corresponding X-axis touch sensor.

In the exemplary embodiment of the present invention of FIGS. 3 to 6, the present invention is limited to the bezel electrode line connected to the X-axis touch sensor. However, this is to clarify the characteristic description of the present invention. The same applies to the case of lines.

According to the present invention as described above, by compensating the resistance values of the plurality of bezel electrode lines electrically connected between the electrode line of the touch sensor and the touch driving circuit in the touch panel to a similar level generated by the difference in the resistance value of the bezel electrode line It is possible to ensure the stable driving of the touch panel by eliminating the error of the touch panel.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments described in the present invention are not intended to limit the technical idea of the present invention but to explain, and the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

10, 100a, 100b, 100c: bezel electrode line,
11a, ... 11n: bezel electrode line pattern according to the prior art,
110a, 110b, ... 110n: bezel electrode line pattern according to the first embodiment of the present invention,
120a, 120b, ... 120n: bezel electrode line pattern according to the second embodiment of the present invention,
130a, 130b, ... 130n: bezel electrode line pattern according to the third embodiment of the present invention,
200: touch sensor,
210: X-axis touch sensor, 230: Y-axis touch sensor.

Claims (7)

In the touch panel,
In order to electrically connect the X-axis electrode line or the Y-axis electrode line of the touch sensor of the touch panel with the driving circuit of the touch panel, a plurality of formed on the bezel of the touch panel corresponding to the X-axis electrode line or the Y-axis electrode line A bezel electrode line,
The plurality of bezel electrode lines are connected one by one in correspondence with the X-axis electrode line or the Y-axis electrode line while the length of the bezel electrode line located outside the bezel electrode line located inside the bezel is longer. And a cross-sectional area thereof is increased in proportion to the length to compensate for the resistance of the electrode line. The method of claim 1,
The bezel electrode line is a touch panel, characterized in that the cross-sectional area is formed on the upper empty space of the adjacent bezel electrode line formed shorter than its own. 3. The method of claim 2,
The bezel electrode line connected to the X-axis electrode line,
And an electrode pattern portion having a Y-axis extending in a longitudinal direction, the cross-sectional area of which is formed on an upper empty space of the adjacent bezel electrode line. The method of claim 3, wherein
The plurality of bezel electrode lines are formed N,
Of the N bezel electrode lines, the electrode pattern portion formed in the longitudinal direction along the Y axis of the k-th bezel electrode line sequentially from the outside of the bezel to the same height as the k-1 bezel electrode line has the same electrode pattern shape. And a cross-sectional area extending by N / k times on an upper empty space of the k−1 th bezel electrode line. 5. The method of claim 4,
Each of the N bezel electrode lines is formed to have a resistance value of the following [Formula 1],

[Formula 1]
Wherein k denotes a sequence number of N bezel electrode lines sequentially formed from the outside of the bezel to the inside, and R ₁ represents a resistance value when the sequence number is 1. 6. The method according to any one of claims 3 to 5,
The bezel electrode line,
The touch panel, wherein the electrode pattern portion having the Y-axis formed in the longitudinal direction is formed by connecting a rectangular pattern in which the area is reduced in the direction from the upper portion to the lower portion of the Y-axis. 6. The method according to any one of claims 3 to 5,
The bezel electrode line,
A touch panel, wherein the electrode pattern portion having the Y axis in the longitudinal direction is formed in a curved shape, the width of which is narrowed from the upper portion of the Y axis toward the lower portion.

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