KR20190042539A - Touch sensor comprising atypical sensor pattern - Google Patents

Abstract

Embodiments of the present invention include a sensor pattern including a plurality of first sensor lines and a plurality of second sensor lines. Since a sensor pattern is formed based on a virtual reference mesh pattern including a plurality of unit cells on which a virtual first reference line and a virtual second reference line overlap each other, the occurrence of moire phenomena may be prevented and the occurrence of foreign materials may be minimized since contact points of the sensor lines are distributed not to be concentrated on any one region, thereby preventing deterioration in the visibility due to the occurrence of the foreign materials.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch sensor and a touch screen panel using the touch sensor.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch sensor and a touch screen panel using the touch sensor. More particularly, the present invention relates to a touch sensor having an irregular pattern forming a touch sensor and a touch screen panel using the touch sensor.

The touch screen panel is an input device added to a display device such as an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), an OLED (Organic Light Emitting Diode), an AMOLED (Active Matrix Organic Light Emitting Diode) And is an apparatus that recognizes an object such as a finger or a touch pen as an input signal when the object touches the screen. Such a touch screen panel has recently been widely used in mobile devices such as a mobile phone, a portable multimedia player (PMP), a smart phone, and the like. In addition, the touch screen panel has a navigation device, a netbook, a notebook, ), Desktop computers using touch-enabled operating systems, Internet Protocol TV (IPTV), state-of-the-art fighter jets, tanks and armored vehicles.

The touch screen panel is a capacitive type that detects the change of capacitance and recognizes the input signal, a resistive film which detects the change of the resistance value by the pressure and recognizes the input signal, the infrared ray is blocked by using the infrared ray emitting element and the light receiving element And infrared sensing for recognizing an input signal. The most commonly used type is a capacitive type. The present invention also relates to such a capacitive touch screen panel and a touch sensor constituting the capacitive touch screen panel.

2. Description of the Related Art Generally, capacitive touch screen panels are formed by bonding two touch sensors or forming a touch sensor on both sides of a single substrate, and the touch sensor is formed in a wire pattern so as to detect a change in capacitance. Since the light must be transmitted, the conductor pattern is formed in the same mesh pattern as the mesh. However, since the mesh pattern is a shape in which thin conductive lines are repeatedly formed at regular intervals, a moire phenomenon occurs when two touch sensors are overlapped.

In order to prevent the moire phenomenon described above, a touch screen panel having a conventional irregular sensor pattern filed by the present applicant is disclosed in Patent Document 1, and FIG. 1 shows a touch screen panel having a conventional irregular sensor pattern Fig. 2 is an enlarged view of a portion A in Fig.

The conventional touch screen panel having an irregular sensor pattern can prevent the moire phenomenon by the irregular sensor pattern 1 as shown in FIG. 1, but it is possible to prevent the moire phenomenon due to excessive irregularity, a region), the sensor pattern is dense, and the sensor pattern is not concentrated in any one region (region a).

As a result, a foreign object is generated in a region where the sensor pattern is dense, and the foreign object is further increased by the region where the sensor pattern is not densely arranged. This causes a problem that the visibility is deteriorated.

That is, although the conventional touch screen panel having an irregular sensor pattern prevents the moiré phenomenon caused by the shaped sensor pattern, the sensor pattern must be densely packed due to excessive irregularity, There is a problem that the visibility is deteriorated.

KR 10-2015-0143987 A (December 24, 2015).

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a touch sensor capable of preventing generation of a moiré phenomenon while suppressing occurrence of a foreign object and securing good visibility, Panel.

According to an aspect of the present embodiment, there is provided a sensor device including a sensor pattern including a plurality of first sensor lines and a plurality of second sensor lines, wherein the sensor pattern includes a plurality of units each including a virtual first reference line and a virtual second reference line Wherein the plurality of first sensor lines are irregular lines that change directions within a predetermined range with reference to the virtual first reference line, Wherein the sensor line is an atypical line for switching the direction within a predetermined range with reference to the virtual second reference line, and a plurality of contacts, in which the plurality of first sensor lines and the plurality of second sensor lines meet, The touch sensor is characterized in that it is dispersedly arranged in a cell.

According to another aspect of the present invention, there is provided a sensor device including a sensor pattern including a plurality of first sensor lines and a plurality of second sensor lines, wherein the sensor pattern includes a plurality of units of overlapping virtual first reference lines and virtual second reference lines Wherein the plurality of first sensor lines are irregular lines that change directions within a predetermined range with reference to the virtual first reference line, Wherein the sensor line is an atypical line for switching the direction within a predetermined range with reference to the virtual second reference line, and a plurality of contacts, in which the plurality of first sensor lines and the plurality of second sensor lines meet, The present invention provides a touch screen panel including a panel on which two touch sensors are disposed.

As described above, the touch sensor and the touch screen panel according to the embodiments of the present invention prevent the moire phenomenon and minimize the occurrence of foreign objects by densely distributing the contact points of the sensor line in any one region , Whereby the visibility can be prevented from being lowered due to the generation of a foreign object.

1 is a plan view of a touch screen panel having a conventional irregular sensor pattern.
2 is an enlarged view of a portion A in Fig.
3 is a plan view of a touch sensor according to an embodiment of the present invention.
4 and 5 are plan views of a touch sensor according to an embodiment of the present invention.
6 is a plan view of a bonded touch sensor according to an embodiment of the present invention.

Hereinafter, a touch sensor and a touch screen panel according to the present invention will be described in detail with reference to the accompanying drawings.

A touch sensor according to the present invention includes a plurality of first sensor lines and a plurality of second sensor lines. The touch sensor includes (i) a plurality of first sensor lines extending in a first direction and (ii) a plurality of second sensor lines extending in a second direction and contacting a plurality of first sensor lines with a plurality of contacts, A plurality of channels constituting the pattern are included. Here, the first direction or the second direction may be set to a specific direction such as a transverse direction, a longitudinal direction, an arbitrary inclination direction, or the like.

3 is a plan view of a touch sensor according to the present invention. The touch sensor according to the present invention includes a substrate 10, a plurality of channels 20 formed on the substrate, and a wiring pattern 30 connecting the channel 20 with an external circuit. A resistance measurement terminal 40 and a discharge terminal 50 may be further formed.

The substrate 10 is an area of a substrate on which the channel 20 and the wiring pattern 30 are formed, and can be used without limitation of materials such as a transparent film, a glass substrate, and a plastic substrate. In particular, the substrate 10 may be formed of a transparent film. The transparent film may be formed using at least one of PET (Polyethylene Terephthalate), PI (Polyimide), Acryl, PEN (Polyethylene Naphthalate) .

The channel 20 is formed on the substrate 10 to detect a user's touch signal. As shown in FIG. 3, one channel 20 includes a plurality of first sensor lines (22) and a plurality of second sensor lines (24) extending in the longitudinal direction cross each other to form a mesh pattern. At this time, the first sensor line 22 and the second sensor line 24 are formed as irregular lines in which a plurality of unit lines 22a and 24a are continuously connected. The channel 20 according to the present invention is formed by intersecting a plurality of first sensor lines 22 and a plurality of second sensor lines 24 so that the channel 20 has four corners { The contact 26 is the same as the contact 25).

4 and 5 show a plan view of the touch sensor according to the present invention. Fig. 4 shows a case where the sensor line between the contact 25 and the contact 25 is a straight line. Fig. 5 shows the contact 25, And the sensor line between the sensor lines 25 is a curved line.

The conditions of the pattern in which the first sensor line 22 and the second sensor line 24 are generated will be described below. 4 and 5, a virtual reference mesh pattern (dotted line) composed of a plurality of first reference lines and a plurality of second reference lines is formed. This is because the first and second It is not a direct component of the present invention as the baseline of the sensor lines 22 and 24. The virtual reference mesh pattern is composed of a plurality of unit cells, and the unit cells are formed in a rectangular (straight quadrangle) shape. For reference, a rectangle means a rectangle in which all four angles are right-angled. The unit cell of the embodiment of the present invention to be described below is based on a square having a length of 500 mu m and a length of 500 mu m.

For example, the first reference line may be a horizontal reference line, and the second reference line may be a vertical reference line. The first reference line and the second reference line may be mutually perpendicular, and the angle at which the first reference line and the second reference line intersect may be an acute angle or an obtuse angle. The first reference line or the second reference line may be set in a predetermined inclination direction.

First, when the channel 20 overlaps with the virtual reference mesh pattern, the first sensor line 22 detects the first reference line H of the virtual reference mesh pattern by ± 30% The width is varied within the following range of width. Likewise, the second sensor line 24 is also varied within a range of ± 30% or less around the second reference line A of the imaginary reference mesh pattern. For example, in the embodiment of the present invention, as shown in FIG. 4, one of the first sensor lines 22 is arranged with respect to the horizontal reference line H Or between the first and second horizontal reference lines H1 and H1 shifted by 150 mu m in the upward direction and the first and second reference lines H2 and H2 shifted by 150 mu m in the downward direction. As shown in FIG. 4, one second sensor line 24 includes a second -1 baseline or first vertical reference line A1 shifted by 150 m in the left direction with respect to the vertical reference line A, And is shifted between the second-2 baseline or the second vertical baseline A2 shifted by 150 [mu] m in the right direction. As a result, the width at which the first sensor line 22 and the second sensor line 24 can be varied is 60% in total.

Further, when the first sensor line 22 and the second sensor line 24 meet with a line forming a reference width of ± 30%, their directions are switched so as not to exceed the reference width. For example, when the first sensor line 22 is brought into contact with the first horizontal reference line H1 or the second horizontal reference line H2, the second sensor line 24 is switched to the first vertical reference line A1 or When it meets the second vertical reference line A2, its direction is switched. The direction of the first sensor line 22 or the second sensor line 24 is changed so that the angle formed by the sensor lines 22 and 24 with the corresponding reference lines A and H is + Or from - to +. {The +, - standard of the angle depends on how you specify. For example, when the angle of the first sensor line 22 with respect to the horizontal reference line H is defined as + when the angle is formed above the horizontal reference line H, it is - when it is formed below the horizontal reference line H. If the first sensor line 22 and the horizontal reference line H do not meet, the first sensor line 22 is arbitrarily extended to meet the horizontal reference line H).

In the case where the conventional irregular sensor pattern has an excessive irregular sensor pattern as described above, the contact point 25 between the first sensor line 22 and the second sensor line 24 can be concentrated in one region, . However, since the variation range of the first sensor line 22 and the second sensor line 24 is limited to 60% or less based on the imaginary reference mesh pattern, the touch sensor according to the present invention is not limited to the first sensor line 22, The contact 25 of the two sensor lines 24 is not concentrated in any one area. Therefore, since the touch sensor according to the present invention prevents the contact 25 from being densely packed, it is possible to minimize the foreign object feeling, and thereby it is possible to prevent the visibility from being lowered due to the occurrence of foreign objects.

The area of one cell 26 of the channel 20 is preferably about ± 20% of the area of the unit cell of the virtual reference mesh pattern. That is, the area of one cell 26 of the channel 20 may have an area of 80 to 120% of the area of one cell of the virtual reference mesh pattern. For example, when the cell 26 having an area smaller than 80% of the cells of the virtual reference mesh pattern and the cell 26 having an area larger than 120% of the cells of the virtual reference mesh pattern are adjacent to each other, It can act as a motive to be concentrated in one area. When the contact point 25 is densely packed in one area, a foreign body sensation may occur. The area of one cell 26 is determined based on the area of a square unit reference pattern formed by four adjacent contacts in the virtual reference mesh pattern. By having a variation range of 20% to 20%, it is possible to prevent the contact 25 from being concentrated in one area.

It is preferable that the plurality of first or second sensor lines 22, 24 connecting the five consecutive contacts 25 among the plurality of contact points 25 are not straight lines. That is, a continuous straight line is allowed only to the three first unit lines 22a or the three second unit lines 24a connected to the four contact points 25, and the first unit line 22a of the first sensor line 22, The second unit line 24a of the first sensor line 22a or the second sensor line 24 is not repeated four times in the same direction at the same angle. If four or more first unit lines 22a or four or more second unit lines 24a are formed in a straight line, it can act as a synchronization for causing a moire phenomenon.

The channel 20 according to the present invention is formed when the line width of the first sensor line 22 and the second sensor line 24 is 20 탆 or less (at least 1 탆 in consideration of workability and electrical conductivity) The length of the unit lines 22a and 24a of the reference mesh pattern is preferably 150% or less of the unit line segment length (500 m) of one cell of the virtual reference mesh pattern. That is, in the embodiment of the present invention, it is preferable that one unit line 22a, 24a is formed at a maximum of 750 mu m or less (for reference, the length of the unit line 22a, 24a optimized for visibility is 500 mu m) . This is to prevent visibility from deteriorating. When the line widths of the first sensor line 22 and the second sensor line 24 are more than 20 占 퐉 or the lengths of the unit lines 22a and 24a are more than 750 占 퐉 There is a possibility that the contact 25 is formed to be densely packed, which may deteriorate the visibility.

As shown in FIG. 4, when the first sensor line 22 and the second sensor line 24 are formed in an irregular straight line, the angles of the unit lines 22a and 24a are less than 30 degrees. That is, in the case of the first unit line 22a, the angle is formed at 30 degrees or less with respect to the first reference line or the horizontal reference line H of the imaginary reference mesh pattern. In the case of the second unit line 24a, The angle of inclination of the reference mesh pattern with respect to the second reference line or the vertical reference line A is 30 degrees or less.

Meanwhile, the first sensor line 22 and the second sensor line 24 according to the present invention may be formed in a curved line as shown in FIG. 5. In this case, the above-described rules are applied.

FIG. 6 is a plan view of a lapped touch sensor according to the present invention, wherein two touch sensors as described above are combined to form one touch screen panel. When the two touch sensors according to the present invention are laminated, the yield and ESD resistance are improved, which will be described in detail in the following table.

Table 1 compares the yields of the conventional lapped touch sensor and the lapped touch sensor according to the present invention, and Table 2 compares the ESD resistance ratios of the conventional lapped touch sensor and the lapped touch sensor according to the present invention. As shown in Table 1, the yield was improved from 89.0% to 97.4%, and the ESD resistance ratio improved from 36.0% to 88.0% by referring to Table 2. This is because the number of contact points (25) is more than that of the prior art, so that the occurrence rate of disconnection is reduced, thereby reducing the defect rate and increasing the tolerance to ESD.

The wiring pattern 30 is a component for transmitting a touch signal sensed from the channel 20 to an external circuit (not shown) and is connected to one end of the channel 20 formed in the substrate 10.

The resistance measurement terminal 40 is formed on the other end of the sensor pattern 20 when the end connected to the wiring pattern 30 is not connected to the wiring pattern 30, , The disconnection of the electrode, the increase or decrease of the resistance, and the like.

Concretely, whether or not the sensor pattern 20 or the wiring pattern 30 connected to the wiring pattern 30 is disconnected and short-circuited by using the voltage measured at the resistance measuring terminal 40 while applying a current to the wiring pattern 30 It can be judged. For example, when the voltage measured at the resistance measurement terminal 40 is measured to be lower than a preset normal value, it can be determined that the channel 20 is disconnected. If the measured voltage is measured to be higher than the normal value, It can be judged that a short-circuit has occurred between them.

The discharge terminal 50 is formed at the other end of the channel 20 connected to the wiring pattern 30 at one end of the channel 20 that is not connected to the wiring pattern 30, 20 to discharge static electricity.

On the other hand, the channel 20 may be formed in a buried shape, that is, an engraved shape, in the substrate 10. When the channel 20 is formed at an obtuse angle, a substrate on which a sensor pattern is formed is wound on a roll, a conductive material is filled in the recessed portion while the substrate is unwound from the roll, and a roll- to-roll method can be used, so that the process is convenient and suitable for mass production.

The present embodiments are for explaining the technical idea of the present embodiment, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment 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.

H: horizontal reference line H1: first horizontal reference line
H2: second horizontal reference line A: vertical reference line
A1: first vertical reference line A2: second vertical reference line
10: substrate 20: channel
22: first sensor line 22a: first unit line
24: second sensor line 24a: second unit line
25: contact 26: cell
30: wiring pattern 40: resistance measuring terminal
50: discharge terminal

Claims (13)

A sensor pattern including a plurality of first sensor lines and a plurality of second sensor lines,
The sensor pattern is formed based on a virtual reference mesh pattern including a plurality of unit cells overlapping a virtual first reference line and a virtual second reference line,
Wherein the plurality of first sensor lines are atypical lines that change directions within a predetermined range with reference to the virtual first reference line,
Wherein the plurality of second sensor lines are atypical lines that change directions within a predetermined range with reference to the virtual second reference line,
Wherein a plurality of contact points where the plurality of first sensor lines and the plurality of second sensor lines meet is distributed and arranged in the plurality of unit cells. The method according to claim 1,
The first sensor line is an irregular line that is variably formed within a range of +/- 30% from the virtual first reference line,
The second sensor line is an irregular line that is variably formed within a range of +/- 30% from the virtual second reference line,
And the width of the ± 30% is based on a length of one side of the unit cell. The method of claim 2,
Wherein the first sensor line is switched from a virtual first reference line to a first reference line or a first reference line corresponding to the width of +/- 30% when the first sensor line and the first sensor line meet. The method of claim 2,
Wherein the second sensor line is switched from the virtual second reference line to the second-1 baseline corresponding to the width of +/- 30% or from the second-baseline along the second baseline. The method of claim 2,
Wherein the first sensor line includes a plurality of first unit lines,
The second sensor line includes a plurality of second unit lines,
Wherein the first unit line is formed at an angle of 30 DEG or less with respect to the virtual first reference line and the second unit line is formed at an angle of 30 DEG or less with respect to the virtual second reference line. sensor. The method of claim 2,
Wherein the first sensor line includes a plurality of first unit lines,
The second sensor line includes a plurality of second unit lines,
Wherein at least four consecutive first unit lines or at least four consecutive second unit lines switch directions at least once. The method of claim 6,
The first sensor line includes three consecutive first unit lines without switching the sign of the angle of incidence with respect to the virtual first reference line
Wherein the second sensor line includes three consecutive second unit lines without switching the sign of the angle of incidence with respect to the virtual second reference line. The method of claim 6,
The first sensor line includes three consecutive first unit lines while maintaining the same angle
Wherein the second sensor line includes three consecutive second unit lines while maintaining the same angle. The method of claim 6,
Wherein the length of the first unit line and / or the second unit line is 150% or less of the length of one side of the unit cell. The method of claim 6,
Wherein the first unit line or the second unit line is a straight line or a curved line. The method of claim 2,
Wherein the area of the unit pattern of the figure formed by the four contact points adjacent to each other in the sensor pattern has a variation range of +/- 20% with respect to the area of one unit cell of the virtual reference pattern. The method of claim 2,
And a line width of the first sensor line and the second sensor line is between 1 and 20 mu m. A touch screen panel comprising a panel in which two touch sensors according to claim 2 are laminated.

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