KR102286730B1 - Touch sensor comprising atypical sensor pattern and touchscreen panel using the same - Google Patents

Abstract

The present invention relates to a touch sensor having an irregular sensor pattern and a touch screen panel using the same, and the touch sensor having an irregular sensor pattern according to the present invention includes a substrate; A plurality of atypical sensor patterns formed on the substrate and a wiring pattern connecting each of the atypical sensor patterns to an external circuit are technically characterized.

Description

A touch sensor having an atypical sensor pattern and a touch screen panel using the same {TOUCH SENSOR COMPRISING ATYPICAL SENSOR PATTERN AND TOUCHSCREEN PANEL USING THE SAME}

The present invention relates to a touch sensor having an atypical sensor pattern and a touch screen panel using the same, and more particularly, to a touch sensor having an irregular sensor pattern forming the touch sensor, and a touch screen panel using the same.

A touch screen panel is an input device designed to be built-in or added to a display device such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), OLED (Organic Light Emitting Diode), AMOLED (Active Matrix Organic Light Emitting Diode), etc. As an example, when an object such as a finger or a touch pen touches the screen, it is a device that recognizes it as an input signal. Such a touch screen panel has recently been widely installed in mobile devices such as mobile phones, portable multimedia players (PMPs), smart phones, etc., and in addition to navigation devices, netbooks, notebook computers, digital information device ), desktop computers using touch input support operating systems, IPTV (Internet Protocol TV), cutting-edge fighters, tanks, and armored vehicles are being used across all industries.

The touch screen panel is a capacitive type that recognizes an input signal by detecting a change in capacitance, a resistive type that recognizes an input signal by detecting a change in resistance by pressure, and checks whether infrared rays are blocked using an infrared light emitting element and a light receiving element. There is an infrared sensing type that recognizes an input signal by whether or not, and the most commonly used is a capacitive type, and the present invention also relates to such a capacitive touch screen panel and a touch sensor constituting the same.

In general, a capacitive touch screen panel is configured by laminating two touch sensors or forming touch sensors on both sides of a single substrate, and the touch sensor is formed in a conductive wire pattern to detect a change in capacitance. Since light must be transmitted, the conductive wire pattern is formed in a mesh pattern such as a net.

However, since the mesh pattern is a form in which thin conductive wires are repeatedly formed at regular intervals, there is a problem in that a moiré phenomenon occurs when two touch sensors are overlapped. Thus, a structure in which the mesh pattern of the touch sensor is not vertical or parallel was adopted.

The structure of the conventional touch screen panel is disclosed in 'Patent Document 1'. 1 shows a conventional touch screen panel, the conventional touch screen panel is formed in a structure in which an upper touch sensor 1 and a lower touch sensor 3 are stacked, and a mesh pattern of the upper touch sensor 1 ( 5) and the mesh pattern 7 of the lower touch sensor 3 form an angle of α so that they are not parallel to each other. Accordingly, the occurrence of the moiré phenomenon due to the periodicity of the mesh pattern is suppressed.

However, in the conventional touch screen panel having a non-parallel mesh pattern, the degree to which the moiré phenomenon is recognized depends on the angle between the mesh patterns (the moiré phenomenon is still recognized in a specific angular section and a special pattern), depending on the specific display panel. In some cases, the required specifications are not satisfied, the light transmittance is easily lowered depending on the circuit structure, and the light transmittance is basically low due to the overlapping of mesh patterns.

Application No. KR 10-2013-0020126 (2013. 2. 26.)

The present invention has been devised to solve the above problems, and the problem to be solved in the present invention is to provide a touch sensor with improved optical characteristics and moiré phenomenon by minimizing the regularity of a mesh pattern, and a touch screen panel using the same. there is.

A touch sensor having an atypical sensor pattern according to the present invention includes: a substrate; A plurality of atypical sensor patterns formed on the substrate and a wiring pattern connecting each of the atypical sensor patterns to an external circuit are technically characterized.

The touch screen panel according to the present invention is characterized in that it is configured by laminating two touch sensors having an atypical sensor pattern according to the present invention.

In the touch sensor having an atypical sensor pattern according to the present invention, the moiré phenomenon is significantly reduced or eliminated when forming a touch screen panel, and compatibility is improved when applied to a display.

In addition, the touch screen panel according to the present invention has excellent applicability to external circuits because of its low dependence on specific shapes of external circuits such as display panels.

In addition, the touch sensor and the touch screen panel having an atypical sensor pattern according to the present invention have excellent optical characteristics.

1 is a conventional touch screen panel;
2 is a touch sensor having an atypical sensor pattern according to the present invention;
3 to 5 show embodiments of the atypical sensor line of the present invention;
6 is an exemplary view in which the same pattern is continuous for 3 pitches in a sensor line
7 is a sensor pattern in which sensor lines are connected by trunk lines;
8 is a plurality of sensor lines of a touch sensor having an atypical sensor pattern according to the present invention;
9 is another embodiment of a touch sensor having an atypical sensor pattern according to the present invention;
10 and 11 are partially enlarged views of FIG.
12 and 13 are a touch screen panel according to the present invention

Hereinafter, a touch sensor having an atypical sensor pattern according to the present invention and a touch screen panel using the same will be described in more detail with reference to the accompanying drawings.

2 is a touch sensor having an atypical sensor pattern according to the present invention. A touch sensor having an atypical sensor pattern according to the present invention includes a substrate 10, a plurality of atypical sensor patterns 20 formed on the substrate, and a wiring pattern 30 for connecting each of the atypical sensor patterns 20 to an external circuit. A resistance measuring terminal 40 , a discharge terminal 50 and a ground electrode 60 may be further formed at one end of the atypical sensor pattern 20 .

The substrate 10 is a region of the substrate on which the atypical sensor pattern 20 and the wiring pattern 30 are formed, and may be used without limitation of a material such as a transparent film, a glass substrate, or a plastic substrate. In particular, the substrate 10 may be formed of a transparent film. The transparent film is made of at least one of PET (Polyethylene Terephthalate), PI (Polymide), Acryl, PEN (Polyethylene Naphthalate), or Glass. can be formed.

The atypical sensor pattern 20 is provided on the substrate 10 and is a component for sensing a user's touch signal, and is preferably formed in a line pattern instead of a conventional mesh pattern in order to increase the aperture ratio. That is, in the atypical sensor pattern 20, a plurality of atypical sensor lines 22 are formed in a predetermined direction, for example, in a horizontal or vertical direction of the substrate. As can be seen from the term 'atypical', the same pattern is repeatedly formed. being excluded is Preferably, all of the atypical sensor lines 22 forming the atypical sensor pattern 20 are required to have different shapes, but in a range in which the moiré phenomenon is not recognized by the human eye due to process efficiency, the atypical sensor line 22 to some extent. Repeating the shape of may be allowed. Although the degree of irregularity of the atypical sensor line 22 will be described in detail below, the basic idea is to prevent the same pattern from being continuous for more than three pitches within one atypical sensor line.

3 is a first embodiment of the atypical sensor line of the present invention, showing a case in which the atypical sensor line is curved.

3 (a) is an embodiment in which the pitch of the atypical sensor line is 500 to 600 μm (Grid Pitch) ± 40 to 60% (atypical intensity), and FIG. 3 (b) is the pitch of the atypical sensor line is 500 to 600 μm An embodiment with ±70-90% is shown. Here, when the pitch of the atypical sensor line is a μm ± b %, when one atypical sensor line is viewed as a function of the longitudinal direction, the distance between the maximum point and the maximum point or the minimum point and the minimum point is a(1 - b/100) μm ~ a(1 + b/100) means that it is distributed in μm. That is, the pitch of the atypical sensor line is equal to the distance at which the phase of one atypical sensor line is different by 360°.

4 is a second embodiment of the atypical sensor line of the present invention, showing a case in which the atypical sensor line is a broken line.

4 (a) is an embodiment in which the pitch of the atypical sensor line is 500 to 600 µm ± 40 to 60%, and FIG. 4 (b) is an embodiment in which the pitch of the atypical sensor line is 500 to 600 µm ± 70 to 90% will show

5 is a third embodiment of the atypical sensor line of the present invention, and the atypical sensor line may be formed of a combination of a broken line (or a straight line) and a curved line.

5 (a) is an embodiment in which the pitch of the atypical sensor line is 500 to 600 µm ± 40 to 60%, and FIG. 5 (b) is an embodiment in which the pitch of the atypical sensor line is 500 to 600 µm ± 70 to 90% will show

In the second and third embodiments of the atypical sensor line shown in FIGS. 4 and 5 , the meaning of the pitch of the atypical sensor line is the same as in the case of FIG. 3 .

6 illustrates a case in which the same pattern is continuous for 3 pitches in a sensor line as a counter example. That is, in the present invention, the meaning that the irregularity of the sensor pattern is satisfied means that the formation of the irregular sensor line as shown in FIG. 6 is excluded.

7 illustrates a sensor pattern in which sensor lines are connected by trunk lines to secure conduction reliability. That is, by connecting the atypical sensor line 22 and the atypical sensor line 22 with a conductive trunk line 24, even if a specific atypical sensor line 22 is disconnected, the entire sensor pattern is not disconnected (actually one channel) (a sensor pattern connected to one wiring pattern in FIG. 2) is prevented from being disconnected}. When trunk lines are formed between sensor lines as shown in FIG. 7 , even if a small number of atypical sensor lines are disconnected, the possibility that the entire sensor pattern is disconnected is very low. Preferably, the trunk line 24 is formed at a point where the distance between the adjacent irregular sensor lines 22 is minimum. Because the trunk line 24 also affects the aperture ratio, in order to increase the aperture ratio, not only the trunk line 24 must be short, but also when the trunk line 24 is short, the resistance value of the trunk line 24 is small. This is because the overall resistance value of the pattern can be lowered. Such a trunk line may be appropriately formed at a plurality of points between adjacent sensor lines.

In the description with reference to FIGS. 3 to 6 , the irregularity along the longitudinal direction of the atypical sensor line has been described. Next, the irregularity along the direction perpendicular to the longitudinal direction of the atypical sensor line will be described.

8 illustrates a plurality of sensor lines of a touch sensor having an atypical sensor pattern according to the present invention. Preferably, all of the atypical sensor lines 22 in the touch sensor are required to have different shapes, but in the range where the moiré phenomenon is not recognized by the human eye due to process efficiency, the shape repetition of the atypical sensor line 22 is allowed to some extent. good. The degree of irregularity in the direction perpendicular to the longitudinal direction of the atypical sensor line 22 is to prevent the formation of the atypical sensor line of the same pattern within a predetermined width w in the direction perpendicular to the longitudinal direction of the atypical sensor line. That is, as shown in FIG. 8 , it is allowed to form atypical sensor lines a and a′ of the same pattern outside a predetermined width w. In the case of a touch sensor applied to a general display, when the same atypical sensor line is formed within 5 cm, it starts to be recognized by the human eye, so w is preferably 5 cm or more.

The wiring pattern 30 is a component that transmits a touch signal sensed from the atypical sensor pattern 20 to an external circuit (not shown), and is connected to one end of the atypical sensor pattern 20 formed on the substrate 10 .

The wiring pattern 30 may have a shape as shown in FIG. 9 . 9 shows another embodiment of a touch sensor having an atypical sensor pattern according to the present invention. The embodiment shown in FIG. 9 is for preventing disconnection of the conductive region when the conductive region, such as a wiring pattern and a ground electrode, is formed by filling the intaglio with a conductive material.

In the embodiment shown in FIG. 9, the wiring pattern 30 is connected to the atypical sensor pattern 20 and includes a pattern in which '∧' and '∨' are alternately continuous so as not to be parallel to the outline of the substrate 10, It is characterized in that it is disposed along the outline of the substrate (10). Accordingly, the wiring pattern 30 is mostly formed in a zigzag pattern adjacent to the outer line of the substrate 10 .

10 and 11 are partial enlarged views of FIG. 9 , which are enlarged areas B and C of FIG. 9 , respectively. The wiring pattern 30 includes a contact part 32 electrically connected to the atypical sensor pattern 20 , and a bonding part 34 that contacts an external driving circuit (not shown) to transmit a touch signal sensed by the atypical sensor pattern 20 . ), and a signal line part 36 including a zigzag pattern connecting the contact part 32 and the bonding part 34 .

The signal line unit 36 may be divided into a first signal line 36a connected to the contact unit 32 and a second signal line 36b connected between the first signal line 36a and the bonding unit 34 . there is. At this time, it is preferable that the first signal line 36a is composed of a conductive grid that is not parallel to the outline of the substrate 10 (in the case of manufacturing the touch sensor in a roll-to-roll method, the engraved pattern is the transfer direction of the substrate when the conductive material is filled) This is to ensure that the conductive material is well filled in the intaglio pattern by forming an oblique line. If the intaglio pattern is perpendicular or parallel to the transfer direction of the substrate, the filling rate of the conductive material is lowered, which is highly likely to cause disconnection in the wiring pattern).

The second signal line 36b is formed to include a zigzag pattern along the outline of the substrate 10 . In this case, one end of the second signal line 36b connected to the first signal line 36a may protrude with respect to the first signal line 36a to form a protruding end 36c. The reason for forming the protruding end 36c is to ensure that discharge occurs at the protruding end 36c as much as possible when static electricity is generated during use and manufacture of the touch sensor or touch screen panel (because charges are collected at the cusp), so that the signal line part In (36), this is to prevent a phenomenon in which the conductive material is lost due to electrostatic discharge (a change in resistance value may be accompanied by disconnection or non-disconnection). In addition, the second signal line 36b can be prevented from being separated from the substrate 10 by being filled in the engraved pattern on which the protrusion P is formed (the upper end of the protrusion protrudes above the second signal line so that the second signal line is connected. It serves to anchor the conductive material that forms it).

The resistance measuring terminal 40 is a side end not connected to the wiring pattern 30 of the atypical sensor pattern 20, that is, when an end connected to the wiring pattern 30 among both ends of the atypical sensor pattern 20 is one end, the other end It is formed in the electrode and is used to detect whether the electrode is disconnected or whether the resistance is increased or decreased.

Specifically, whether the atypical sensor pattern 20 or the wiring pattern 30 connected to the wiring pattern 30 using a voltage measured at the resistance measuring terminal 40 while applying a current to the wiring pattern 30 is disconnected or short-circuited can be judged For example, when the voltage measured at the resistance measuring terminal 40 is measured lower than a preset normal value, it can be determined that the atypical sensor pattern 20 is disconnected, and when the measured voltage is measured higher than the normal value, the atypical sensor It may be determined that a short circuit has occurred between the patterns 20 .

The discharge terminal 50 is a side end that is not connected to the wiring pattern 30 of the atypical sensor pattern 20, that is, an end connected to the wiring pattern 30 among both ends of the atypical sensor pattern 20 is at the other end. It is a component that is formed to discharge static electricity induced in the atypical sensor pattern 20 . Therefore, it is desirable to have a pointed tip 52 to facilitate electrostatic discharge. The discharge electrode is disposed opposite to the atypical sensor pattern 20 , or disposed opposite to the resistance measuring terminal 40 when the resistance measuring terminal 40 is provided. When the tip 42 is provided on the resistance measuring terminal 40, it is advantageous for the discharging to face the tip 52 of the discharging terminal 50 and the tip 42 of the resistance measuring terminal 40. However, for the convenience of manufacture, as shown in FIG. 2 , the electrode of the grid pattern may be cut so that the tip 52 of the discharge terminal 50 and the tip 42 of the resistance measuring terminal 40 are displaced from each other. there is.

The ground electrode 60 is a component that discharges static electricity when manufacturing a touch sensor or a touch screen panel and supplies a ground voltage when the touch screen panel operates, and may include a zigzag pattern (the wiring pattern is formed including the zigzag pattern) same reason). In the case of the ground electrode 60, the configuration is different in that it is formed on the outermost side of the substrate 10, that is, the atypical sensor pattern 20, the wiring pattern 30, the resistance measuring terminal 40, the discharge terminal 50, etc. It is advantageous in terms of arrangement relationship with elements.

Meanwhile, the atypical sensor pattern 20 may be embedded in the substrate 10 , that is, formed in an intaglio. When the intaglio atypical sensor pattern 20 is formed, the substrate on which the sensor pattern is formed is wound on a roll, the substrate is unwound from the roll, the intaglio is filled with a conductive material, and then the roll-to-roll is wound on the roll again. Because the roll-to-roll method can be used, the process is convenient and suitable for mass production. Of course, the atypical sensor pattern 20 can also be formed in embossing, and accordingly, the wiring pattern 30, the resistance measuring terminal 40, and the discharge terminal 50 can also be formed in an embossed or engraved shape.

12 and 13 show a touch screen panel according to the present invention, the touch screen panel according to the present invention is a touch sensor 100 having an atypical sensor pattern according to the present invention by laminating two sheets or (Fig. 12) , can be implemented by forming the atypical sensor pattern according to the present invention on both sides of one substrate ( FIG. 13 , thick lines are the atypical sensor patterns formed on the upper surface of the substrate, and the thin lines are the atypical sensor patterns formed on the lower surface of the substrate).

10 Board 20 Atypical sensor pattern
22 Atypical sensor line 24 Main line
30 wiring pattern 32 contacts
34 bonding unit 36 signal line unit
36a first signal line 36b second signal line
36c Protrusion 40 Resistance measurement terminal
42, 52 Tip 50 Discharge terminal
60 ground electrode

Claims (12)

Board;
a plurality of atypical sensor patterns formed on the substrate;
and a wiring pattern connecting each of the atypical sensor patterns to an external circuit,
The atypical sensor pattern consists of a plurality of atypical sensor lines spaced apart from each other in a horizontal or vertical direction of the substrate,
A conductive trunk line is connected between the plurality of atypical sensor lines,
An atypical sensor line having the same pattern as the atypical sensor line is not formed within 5 cm in width in a direction perpendicular to the longitudinal direction of the atypical sensor line,
The trunk line is a touch sensor having an irregular sensor pattern, characterized in that formed at a point where the distance between adjacent irregular sensor lines is the minimum.
delete The method according to claim 1,
The atypical sensor line is a touch sensor with an atypical sensor pattern, characterized in that the pitch is 500-600㎛ ± 70-90%.
The method according to claim 1,
The atypical sensor line is a touch sensor having an atypical sensor pattern, characterized in that it is a curve, a broken line, or a combination of a curved line and a broken line.
Board; a plurality of atypical sensor patterns formed on the substrate; and a wiring pattern connecting each of the atypical sensor patterns to an external circuit,
The wiring pattern is
a contact part electrically connected to the atypical sensor pattern; a bonding unit that contacts the external circuit and transmits a touch signal sensed from the atypical sensor pattern; and a signal line part connecting the contact part and the bonding part;
The signal line unit includes a first signal line connected to the contact unit and a second signal line connected between the first signal line and the bonding unit, wherein the first signal line is formed by filling an intaglio pattern with a conductive material. A touch sensor having an atypical sensor pattern, characterized in that it is formed of a conductive grid that is not parallel to the outline of the substrate.
6. The method of claim 5,
The second signal line is a touch sensor having an atypical sensor pattern, characterized in that the engraved pattern is filled with a conductive material and is formed to include a zigzag pattern along the outline of the substrate.
6. The method of claim 5,
Further comprising a ground electrode formed on the outside of the substrate,
The ground electrode is a touch sensor having an atypical sensor pattern, characterized in that the engraved pattern is filled with a conductive material and is formed to include a zigzag pattern along the outline of the substrate. delete delete delete delete delete

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