TWI781603B - Touch panel - Google Patents

Abstract

A touch panel is disclosed. The touch panel includes a sensing area. The touch panel includes driving signal terminal, sensing signal lines and input signal lines. The driving signal terminal is disposed on one side of the touch sensing area. The driving signal terminal includes a sensing signal source and an input signal source. The sensing signal lines include first sensing signal lines and second sensing signal lines. The first sensing signal lines are coupled to the sensing signal lines to transmit the sensing signals and the second sensing signal lines are coupled to the input signal lines to receive the input signals. The input signal lines are coupled to the second sensing signal lines at the touch sensing area, so as to receive the input signals.

Description

touch panel

The present invention relates to a touch panel, in particular to a touch panel with sensing areas of different sizes without re-making the touch sensing circuit.

In large-sized capacitive touch panels, metal grids are mostly used as electrode materials due to impedance. In a general touch panel, the input and output signals will enter and exit the substrate from the same side, and the sensing signal will be connected to the touch electrode from the same side, and the input signal will be routed to the other two sides to enter the touch sensing area and the other side. A set of electrodes is connected. During operation, the pulse wave signal is input from the input signal terminal, and then the signal is output from the sensing signal terminal through capacitive coupling. The intensity of the output signal is affected by the touch of the finger, and then it is judged whether there is a touch action.

For electronic products of different sizes or smaller-sized portable electronic devices, the demand for panels with different touch-sensing areas increases accordingly, especially for panels with rounded corners, if cutting according to the existing touch panels, the original The signal routing will not be able to cover all the touch sensing area, which will cause the line to be cut and cannot be driven smoothly. If the corresponding touch sensing circuit is designed for different products, a new photomask must be designed to manufacture the relevant circuit, and the design cost and manufacturing cost required for new product development will be greatly increased.

By designing a touch panel, the present invention improves the deficiencies of the prior art, thereby enhancing industrial implementation and utilization.

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a touch panel, which can solve the problem that touch sensing lines cannot be shared among touch panels of different sizes.

According to the above purpose, an embodiment of the present invention provides a touch panel, which includes a touch sensing area, and the touch panel includes a driving signal terminal, a plurality of sensing signal lines, and a plurality of input signal lines. The driving signal terminal is arranged on one side of the touch sensing area, and the driving signal terminal includes a sensing signal source for receiving sensing signals and an input signal source for transmitting input signals. A plurality of sensing signal lines are arranged along the first direction of the touch sensing area. The plurality of sensing signal lines include a plurality of first sensing signal lines and a plurality of second sensing signal lines. The plurality of first sensing signal lines are coupled to the sensing The signal source is used to transmit the sensing signal, and the plurality of second sensing signal lines are coupled to the input signal source to receive the input signal. The plurality of input signal lines are arranged along a second direction different from the first direction, and the plurality of input signal lines are electrically connected to the plurality of second sensing signal lines in the touch sensing area to receive input signals.

In an embodiment of the present invention, the plurality of first sensing signal lines and the plurality of second sensing signal lines may be alternately arranged in the touch sensing area.

In an embodiment of the present invention, a second sensing signal line may be provided between two adjacent first sensing signal lines among the plurality of first sensing signal lines, and the plurality of input signal lines and the plurality of second sensing signal lines The plurality of contacts are located within 95% of the area width of the touch sensing area.

In an embodiment of the present invention, two second sensing signal lines may be arranged between two adjacent first sensing signal lines among the plurality of first sensing signal lines, and the plurality of input signal lines and the plurality of second sensing signal lines The plurality of contacts of the line are located within 60% of the area width of the touch sensing area.

In an embodiment of the present invention, a plurality of sensing signal lines can be disposed on the first metal layer, a plurality of input signal lines can be disposed on the second metal layer, and a plurality of second sensing signal lines are electrically connected to a plurality of sensing signal lines through through holes. signal line.

In an embodiment of the present invention, the plurality of sensing signal lines and the plurality of input signal lines may respectively include metal grids.

In an embodiment of the present invention, the first direction may perpendicularly intersect with the second direction.

In an embodiment of the present invention, the signal receiving direction of the sensing signal source can be parallel to the signal transmitting direction of the input signal source, and the transmitting direction of the sensing signal on the plurality of first sensing signal lines can be parallel to that of the input signal on the plurality of input signal lines. The conveying direction is vertical.

In an embodiment of the present invention, the touch sensing area may have a circular or elliptical shape.

As mentioned above, according to the touch panel disclosed in the embodiment of the present invention, the sensing signal line is divided into the first sensing signal line for receiving the sensing signal and the second sensing signal line for receiving the input signal. The two sensing signal lines are coupled to the input signal line, so that the touch sensing signal can be driven in the sensing area to detect the touch signal. Since the input signal does not need wiring outside the sensing area, the width of the touch panel frame can be reduced. On the other hand, touch panels of different sizes can also be cut directly, and the original circuit can be used for driving without redesigning the circuit. configuration, reducing development costs.

10: Touch panel

11: Touch sensing area

12: Drive signal terminal

21,31,41: Induction signal source

22,32,42: input signal source

33,43: Original sensing area

34,44: demand sensing area

35,45: cutting area

BD: circuit board

D1: the first direction

D2: Second direction

H1, H2: through hole

R11...R1m, R1X: the first induction signal line

R21...R2n, R2X: the second induction signal line

T1...T1n,TX,T1X: input signal lines

In order to make the technical features, content and advantages of the present invention and the effects that can be achieved more obvious, the present invention is hereby combined with the accompanying drawings, and described in detail in the form of embodiments as follows: The first figure is an example of an embodiment of the present invention Schematic diagram of the touch panel.

Fig. 2 is a schematic diagram of the sensing signal line and the input signal line of the embodiment of the present invention.

FIG. 3A and FIG. 3B are schematic diagrams of setting the second sensing signal line according to the embodiment of the present invention.

FIG. 4A and FIG. 4B are schematic diagrams of setting the second sensing signal line according to another embodiment of the present invention.

In order to facilitate the understanding of the technical features, content and advantages of the present invention and the effects that can be achieved, the present invention is hereby combined with the accompanying drawings and described in detail in the form of embodiments as follows, and the purpose of the drawings used therein is only For the purpose of illustrating and assisting the description, it may not be the true proportion and precise configuration of the present invention after implementation. Therefore, the scale and configuration relationship of the attached drawings should not be interpreted or limited to the scope of rights of the present invention in actual implementation. Description.

In the drawings, the thickness or width of layers, films, panels, regions, light guides, etc., are exaggerated for clarity. Throughout the specification, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connection" may refer to physical and/or electrical connection. Furthermore, "electrically connected", "coupled" or "coupled" means that other elements exist between two elements. In addition, it should be understood that although the terms "first", "second", and "third" may be used herein to describe various elements, components, regions, layers and/or sections, they are used to refer to an element, component , A region, layer and/or section is distinguished from another element, component, region, layer and/or section. Therefore, they are for descriptive purposes only and should not be construed as indicating or implying relative importance or ordering relationship thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art and the present invention, and will not be interpreted as idealized or excessive formal meaning, unless expressly so defined herein.

Please refer to FIG. 1, which is a schematic diagram of a touch panel according to an embodiment of the present invention. As shown in the figure, the touch panel 10 includes a touch sensing area 11 and a driving signal terminal 12 arranged on one side of the touch sensing area 11. In this embodiment, the touch sensing area 11 has a circular shape, such as the touch screen surface of a smart watch, but the disclosure is not limited thereto. In other embodiments, the touch sensing area 11 can be oval. or other rounded shapes.

The driving signal terminal 12 is disposed on the circuit board BD above the touch sensing area 11 , and includes a sensing signal source 21 for receiving sensing signals and an input signal source 22 for transmitting input signals. In this embodiment, the sensing signal source 21 is disposed in the center of the circuit board BD and the input signal sources 22 are disposed on both sides. In other embodiments, according to the size of the touch panel 10 , the number and positions of the signal sources can be adjusted accordingly. In addition, the driving signal terminal 12 can also be arranged on an appropriate side according to the structural design of the device.

Corresponding to the sensing signal source 21 and the input signal source 22, a plurality of sensing signal lines are arranged along the first direction D1 of the touch sensing area 11, and the plurality of sensing signal lines (R1X, R2X) include m first sensing lines arranged alternately. The signal lines R11...R1m and n second sensing signal lines R21...R2n, the m first sensing signal lines R11...R1m are coupled to the sensing signal source 21 to transmit sensing signals, and the n second sensing signal lines The signal lines R21 . . . R2n are coupled to the input signal source 22 for receiving input signals. n input signal lines T1...T1n along with The first direction D1 is different from the second direction D2. The n input signal lines T1...T1n are electrically connected to the n second sensing signal lines R21...R2n in the touch sensing area 11 to receive input signals, so that The input signal is transmitted along the second direction D2. According to the above arrangement structure, since the first sensing signal line R1X and the second sensing signal line R2X are arranged in parallel, the sensing signal of the sensing signal source 21 and the input signal of the input signal source 22 are both in the signal receiving direction and the signal transmitting direction respectively. Parallel transmission along the first direction D1 enables the signal source to be disposed on the same side to save the surrounding structure area.

When the input signal is transmitted to the input signal line T1...T1n through the second sensing signal line R21...R2n, the transmission direction of the input signal is perpendicular to the transmission direction of the sensing signal, so that the two vertically intersect to define the touch sensing Sensing location in zone 11. In this embodiment, the second direction D2 where the n input signal lines T1...T1n are arranged is perpendicular to the first direction D1, but the disclosure is not limited thereto. In other embodiments, the first direction D1 is perpendicular to the first direction D1. The two directions D2 may intersect at a predetermined angle.

Please refer to FIG. 2, which is a schematic diagram of the sensing signal line and the input signal line of the embodiment of the present invention. As shown in the figure, the plurality of sensing signal lines include the first sensing signal line R1X and the second sensing signal line R2X arranged alternately. , the first sensing signal line R1X and the second sensing signal line R2X are metal grid lines of the first metal layer, respectively transmit sensing signals and receive sensing signals through the first direction D1. Similar to the foregoing embodiments, the first sensing signal line R1X is coupled to the sensing signal source to transmit the sensing signal, and the second sensing signal line R2X is coupled to the input signal source to receive the input signal. The sensing signal source and the input signal source can be arranged on the same side, respectively receive the sensing signal and transmit the input signal along the first direction.

In addition to the first metal layer, the second metal layer is provided with a plurality of input signal lines T1X, and these input signal lines T1X are also arranged along the second direction D2 with metal grid lines, between the first metal layer and the second metal layer Between them, the second sensing signal line R2X is electrically connected to the input signal line T1X through the through holes H1 and H2, so that the input signal of the second sensing signal line R2X can be transmitted to the input signal line T1X. In this embodiment, the first metal layer sacrifices part of the line area to transmit the input signal. However, compared with the simple transmission of the induction signal by the first metal layer and the transmission of the input signal by the second metal layer, the received signal in this embodiment There is not much difference in the amount of touch sensitivity. In other words, the touch panel designed in this embodiment can maintain the required requirements in the effect of sensing touch, and will not cause the problem that the sensing value is too low to judge the touch operation.

Please refer to Figure 3A and Figure 3B, which are schematic diagrams of setting the second sensing signal line according to the embodiment of the present invention, wherein Figure 3A is a schematic diagram of setting the first sensing signal line and the second sensing signal line, and Figure 3B is Schematic diagram of cutting the touch sensing area. As shown in FIG. 3A, the first sensing signal line R1X and the second sensing signal line R2X are arranged alternately, and a second sensing signal line R2X is arranged on two adjacent first sensing signal lines R1X. Corresponding to this staggered arrangement in The corresponding position of the touch sensing area is shown in FIG. 3B.

In this embodiment, the touch panel includes a sensing signal source 31 for receiving sensing signals and an input signal source 32 for transmitting input signals. The two signal sources are arranged on the same side of the original sensing area 33. The sensing line structure of the area width R can be as described in the above-mentioned embodiment, the sensing signal source 31 transmits the sensing signal through the first sensing signal line R1X to receive, and the input signal is transmitted from the input signal source 32 through the second sensing signal line R2X , and then coupled to the input signal line TX through the through hole, and converted to transmit in the orthogonal direction. Similarly, the first sensing signal line R1X and the second sensing signal line R2X can be metal grid lines of the first metal layer, and the input signal line TX can be metal grid lines of the second metal layer.

In the case of different product requirements, the size of the sensing area required by the touch panel will also change correspondingly, for example, cutting the original area into a touch panel with a smaller size, such as the demand sensing area 34 in the figure. In this embodiment, since a second sense signal line R1X is set between two adjacent first sense signal lines R1X The response signal line R2X, so the multiple contacts of the second induction signal line R2X and the input signal line TX, that is, the part where the input signal is to be transmitted to the input signal line TX, will have a set slope m1, in order to make the demand induction Each input line in the area 34 can receive an input signal, and these contacts must be located within the horizontal range of the touch panel. As shown in the figure, the actual cutting area 35 of the touch panel must retain some circuits in the lateral peripheral area. Therefore, the width r of the cutting area is about 95% of the width R of the original area.

Please refer to Figure 4A and Figure 4B, which are schematic diagrams of setting the second sensing signal line according to another embodiment of the present invention, wherein Figure 4A is a schematic diagram of setting the first sensing signal line and the second sensing signal line, and Figure 4B The figure is a schematic diagram of the cutting of the touch sensing area. As shown in Figure 4A, the first sensing signal line R1X and the second sensing signal line R2X are arranged alternately, and two second sensing signal lines R2X are arranged on two adjacent first sensing signal lines R1X, corresponding to this staggered arrangement The corresponding position in the touch sensing area is shown in FIG. 4B.

In this embodiment, the touch panel includes a sensing signal source 41 for receiving sensing signals and an input signal source 42 for transmitting input signals. The two signal sources are arranged on the same side of the original sensing area 43. The sensing circuit structure with the area width R can be as described in the above-mentioned embodiments, the sensing signal source 41 receives the sensing signal transmitted by the first sensing signal line R1X, and the input signal is transmitted from the input signal source 42 through the second sensing signal line R2X transmission, and then coupled to the input signal line TX through the through-hole, converted to transmission in the orthogonal direction. Likewise, the first sensing signal line R1X and the second sensing signal line R2X can be metal grid lines of the first metal layer, and the input signal line TX can be metal grid lines of the second metal layer.

Similarly, when changing the size of the sensing area required by the touch panel, it is desired to cut the original area into a touch panel with a smaller size, such as the required sensing area 44 in the figure. In this example, in two phases Two second sensing signal lines R2X are arranged between adjacent first sensing signal lines R1X, so the plurality of contacts between the second sensing signal line R2X and the input signal line TX will have a set slope m2, and the slope m2 is smaller than The foregoing embodiments are large so that the lateral extent of these contacts is small. As shown in the figure, the actual cutting area 45 of the touch panel can be cut in a large area in the lateral peripheral area. Therefore, the width r of the cutting area is about 60% of the width R of the original area.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended patent application.

10: Touch panel

11: Touch sensing area

12: Drive signal terminal

21: Induction signal source

22: Input signal source

BD: circuit board

D1: the first direction

D2: Second direction

R11...R1m: the first induction signal line

R21...R2n: Second sensing signal line

T1...T1n: input signal line

Claims (9)

A touch panel, which includes a touch sensing area, the touch panel includes: a driving signal end, arranged on one side of the touch sensing area, the driving signal end includes a sensing signal source for receiving a sensing signal and An input signal source that transmits an input signal; a plurality of sensing signal lines are arranged along a first direction of the touch sensing area, and the plurality of sensing signal lines include a plurality of first sensing signal lines and a plurality of second sensing lines Signal lines, the plurality of first sensing signal lines are coupled to the sensing signal source to transmit the sensing signal, the plurality of second sensing signal lines are coupled to the input signal source to receive the input signal; and a plurality of input signals The lines are arranged along a second direction different from the first direction, and the plurality of input signal lines are electrically connected to the plurality of second sensing signal lines in the touch sensing area to receive the input signal. The touch panel as described in claim 1, wherein the plurality of first sensing signal lines and the plurality of second sensing signal lines are arranged in the touch sensing area alternately. The touch panel as described in claim 2, wherein a second sensing signal line is arranged between two adjacent first sensing signal lines among the plurality of first sensing signal lines, and the plurality of input signal lines and the plurality of input signal lines The plurality of contacts of the second sensing signal lines are located within 95% of a region width of the touch sensing area. The touch panel as described in claim 2, wherein two second sensing signal lines are arranged between two adjacent first sensing signal lines among the plurality of first sensing signal lines, and the plurality of input signal lines are connected to the plurality of input signal lines The plurality of contacts of the plurality of second sensing signal lines are located within 60% of an area width of the touch sensing area Inside. The touch panel as described in claim 1, wherein the plurality of sensing signal lines are arranged on a first metal layer, the plurality of input signal lines are arranged on a second metal layer, and the plurality of second sensing signal lines pass through a The through holes are electrically connected to the plurality of sensing signal lines. The touch panel according to claim 5, wherein the plurality of sensing signal lines is a metal grid line, and the plurality of input signal lines is another metal grid line. The touch panel according to claim 1, wherein the first direction and the second direction perpendicularly intersect. The touch panel as described in claim 1, wherein the signal receiving direction of the sensing signal source is parallel to the signal transmitting direction of the input signal source, and the transmitting direction of the sensing signal on the plurality of first sensing signal lines is parallel to the input signal perpendicular to the transmission direction of the plurality of input signal lines. The touch panel according to claim 1, wherein the touch sensing area has a circular or oval shape.

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