CN101840286B - touch panel - Google Patents

Abstract

The embodiment of the invention provides a touch panel, which comprises a plurality of driving lines, a plurality of sensing lines and a plurality of sensing units. The sensing lines and the driving lines are arranged in a crossing manner. The sensing units are arranged in an array, and each sensing unit is electrically coupled to a corresponding driving line and a corresponding sensing line. The driving lines and the sensing lines are arranged on the touch panel, wherein the routing of one of the driving lines and the sensing lines passes through two opposite sides of the touch panel, and the routing of the other of the driving lines and the sensing lines passes through only one side of the touch panel. By the embodiment of the invention, the RC load can be greatly reduced, and the attenuation of signals is avoided.

Description

touch panel

technical field

The present invention relates to the field of touch detection, and in particular to a large-size touch panel (TouchPanel).

Background technique

With the advancement of technology, the touch panel is widely used in various electronic products as a new human-computer interaction interface because it is more intuitive and more human-friendly in use.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an existing touch panel. As shown in FIG. 1 , the touch panel 10 includes a plurality of driving lines 11 , a plurality of sensing lines 12 and a plurality of sensing units 13 . The driving lines 11 and the sensing lines 12 are arranged to cross each other. The sensing units 13 are arranged in an array, and each sensing unit 13 is electrically coupled to a corresponding driving line 11 and a corresponding sensing line 12, so as to transmit a driving signal to each sensing unit through the corresponding driving line 11. unit 13, and read the sensing signal generated on each sensing unit 13 through the corresponding sensing line 12 to determine whether the sensing unit 13 is touched.

As shown in FIG. 1 , the sensing units 13 in each row are electrically coupled to the same driving line 11 , and the sensing units 13 in each column are electrically coupled to the same sensing line 12 . That is to say, the routing of the driving line 11 only passes through one side of the touch panel 10 so as to be electrically coupled to the driving circuit (not shown in the figure), and transmits the driving signal in the first direction X through the driving line 11 to the Sensing units 13 for each row. The routing of the sensing line 12 also only passes through one side of the touch panel 10 to be electrically coupled to the reading circuit (not shown in the figure), and reads each column in the second direction Y through the sensing line 12 The sensing signal generated by the sensing unit 13.

Each driving line 11 on the touch panel 10 needs to drive a large number of sensing units 13, and each sensing line 12 needs to read the sensing signals generated by a large number of sensing units 13, so it is easy to generate resistance and capacitance. The problem of excessive load (RC loading, Resistance Capacitor loading) causes signal attenuation. Moreover, the larger the size of the touch panel 10 is, the greater the above-mentioned problems will be. Therefore, this phenomenon greatly limits the development trend of the touch panel to a larger size.

Contents of the invention

One of the objectives of the present invention is to provide a touch panel that can reduce RC load and avoid signal attenuation.

The present invention provides a touch panel, which is divided into a first area, a second area, a third area and a fourth area. Wherein the first area and the second area are arranged in the first direction, the third area and the fourth area are arranged in the first direction, and the first area and the third area are arranged in the second direction, and the second area and the fourth area are arranged in the first direction. The regions are arranged in the second direction. The first direction and the second direction are perpendicular to each other, and each area includes a plurality of driving lines, a plurality of sensing lines, and a plurality of sensing units. The driving lines and the sensing lines are arranged to cross each other, and the sensing units are arranged in an array, and each sensing unit is electrically coupled to a corresponding driving line and a corresponding sensing line. The routing of one of the driving lines and the sensing lines passes through opposite two sides of the touch panel, while the routing of the other of the driving lines and sensing lines only passes through one side of the touch panel.

In a preferred embodiment of the present invention, the routing of the sensing lines in each area only passes through one side of the touch panel, and the routing of the driving lines in the first area and the second area in the first direction The wires pass through opposite sides of the touch panel respectively, and the driving lines in the third area and the fourth area located in the first direction also respectively pass through opposite sides of the touch panel. In addition, the sensing lines in the third area pass through the first area, and the sensing lines in the fourth area pass through the second area.

In a preferred embodiment of the present invention, the routing of the driving lines in each area only passes through one side of the touch panel, and the routing of the sensing lines in the first area and the third area in the second direction The wires respectively pass through opposite sides of the touch panel, and the traces of the sensing lines located in the second area and the fourth area in the second direction also respectively pass through opposite sides of the touch panel. Also, the driving lines in the first area pass through the second area, and the driving lines in the third area pass through the fourth area.

In a preferred embodiment of the present invention, more than two touch panels can be combined together to form another touch panel.

In a preferred embodiment of the present invention, the components of the touch panel are respectively disposed on the color filter substrate of the liquid crystal display, such as between the protective layer of the color filter substrate and the color filter.

The present invention also provides a touch panel, including a plurality of driving lines, a plurality of sensing lines and a plurality of sensing units. The sensing line and the driving line are arranged to cross each other. The sensing units are arranged in an array, and each sensing unit is electrically coupled to a corresponding driving line and a corresponding sensing line. Wherein, one of the driving line and the sensing line passes through opposite two sides of the touch panel, and the other of the driving line and the sensing line only passes through one side of the touch panel.

In a preferred embodiment of the present invention, the routing of the driving lines passes through two opposite sides of the touch panel, while the routing of the sensing lines only passes through one side of the touch panel. Alternatively, the routing of the driving lines only passes through one side of the touch panel, while the routing of the sensing lines passes through opposite sides of the touch panel.

The beneficial effect of the present invention is that the drive line or the sensing line on the touch panel of the present invention respectively passes through the opposite two sides of the touch panel, while the other only passes through one side of the touch panel, thus greatly reducing the RC load to avoid signal attenuation.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are described below in detail with accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of a conventional touch panel.

FIG. 2 is a schematic diagram of a touch panel disclosed by an embodiment of the present invention.

FIG. 3 is a schematic diagram of the specific structure of the touch panel disclosed in FIG. 2 .

FIG. 4 is a schematic diagram of a touch panel disclosed by another embodiment of the present invention.

[Description of main component symbols]

10, 100: touch panel

11. X11, X12, X21, X22...Xn1, Xn2, X(n+1)1, X(n+1)2...: drive line

12. Y11, Y12, Y21, Y22...Ym1, Ym2, Y(m+1)1, Y(m+1)2...: Sensing line

13, 110: Sensing unit

101, 102, 103: side of the touch panel

I: first area

II: Second Zone

III: The third area

IV: The Fourth Region

X1, X2, Y1, Y2, Y: direction

Detailed ways

Please refer to FIG. 2 and FIG. 3 , wherein FIG. 2 is a schematic diagram of a touch panel disclosed by an embodiment of the present invention, and FIG. 3 is a schematic structural diagram of the touch panel disclosed in FIG. 2 . As shown in FIG. 3 , the touch panel 100 is divided into four regions, namely a first region I, a second region II, a third region III and a fourth region IV. Wherein, the first area I and the second area II are arranged horizontally, the third area III and the fourth area IV are arranged horizontally; the first area I and the third area III are arranged vertically, and the second area II and the fourth area IV are arranged vertically .

The touch panel 100 includes a plurality of driving lines X11, X12, X21, X22...Xn1, Xn2, X(n+1)1, X(n+1)2..., a plurality of sensing lines Y11, Y12, Y21, Y22 ...Ym1, Ym2, Y(m+1)1, Y(m+1)2..., a plurality of sensing units 110, wherein n and m are natural numbers respectively. Driving lines X11, X12, X21, X22...Xn1, Xn2, X(n+1)1, X(n+1)2...and sensing lines Y11, Y12, Y21, Y22...Ym1, Ym2, Y(m+ 1) 1, Y(m+1) 2 . . . are arranged across each other, the sensing units 110 are arranged in an array, and each sensing unit 110 is electrically coupled to a corresponding driving line and a corresponding sensing line.

Driving lines X11, X12, X21, X22...Xn1, Xn2, X(n+1)1, X(n+1)2..., sensing lines Y11, Y12, Y21, Y22...Ym1, Ym2, Y(m+ 1)1, Y(m+1)2... and the sensing units 110 are distributed in the first area I, the second area II, the third area III and the fourth area IV. Wherein, the routing of the driving lines X11, X21... in the first area I passes through one side 101 of the touch panel 100, and the routing of the driving lines X12, X22... in the second area II passes through the opposite side of the touch panel 100. The other side 102; similarly, the routing of the driving lines Xn1, X(n+1)1... in the third area III also passes through one side 101 of the touch panel 100 as in the first area I, and the fourth area IV The driving lines Xn2 , X(n+1)2 . The routing of the sensing lines Y11, Y21, . And the sensing lines Y11 , Y21 . . . in the first area I pass through the same side 103 of the touch panel 100 . Similarly, the routing of the sensing lines Ym1, Y(m+1)1... in the second area II passes through one side 103 of the touch panel 100, while the sensing lines Ym2, Y(m) in the fourth area IV +1) The traces of 2 .

That is to say, the driving lines X11, X12, X21, X22 . . . Xn1, Xn2, X(n+1)1, X(n+1)2 . The opposite sides 101 and 102 are used to input driving signals from the opposite sides 101 and 102 of the touch panel 100 to the driving lines X11, X12, X21, X22 . . . Xn1, Xn2, X(n+1)1, X(n +1)2...to drive the sensing unit 110; on the contrary, the sensing lines Y11, Y12, Y21, Y22...Ym1, Ym2, Y(m+1)1, Y(m+1) on the touch panel 100 2... The wiring only passes through one side 103 of the touch panel, so as to pass the sensing signal generated by the sensing unit 110 through the sensing lines Y11, Y12, Y21, Y22...Ym1, Ym2, Y(m+1) 1. Y(m+1)2... is transmitted from the side 103 of the touch panel. That is, the touch panel 100 transmits driving signals to the sensing units 110 in each row from two opposite directions X1 and X2 through two different driving lines, such as X11 and X12; and through two different sensing lines, such as Y11 As with Y12 , the sensing signals generated by the sensing units 110 of each column are read from the same direction Y.

Since the sensing units 110 of each row in the first region I and the second region II or the third region III and the fourth region IV arranged in the horizontal direction are respectively transmitted from two opposite directions X1 and X2 through two different driving lines. Therefore, the length of each driving line can be greatly shortened, and the number of sensing units 110 driven by each driving line is also reduced. In this way, the RC load can be reduced through the above-mentioned design, and a large attenuation of the driving signal can be avoided.

In addition, although the sensing units 110 of each column in the first region I and the third region III or the second region II and the fourth region IV arranged vertically read out the sensing signals from the same direction Y, However, it also reads the sensing units 110 in two different regions through two different sensing lines, so the number of sensing units 110 read by each sensing line is also reduced, so it can also be reduced. Small RC load can avoid the attenuation of the sensing signal to a certain extent.

Those skilled in the art can understand that the present invention can also be changed into other designs. For example, the routing of the driving lines in the touch panel 100 can only pass through one side of the touch panel, and the sensing lines in the vertically arranged first area I and the third area III or the second area II and the fourth area IV can be made to pass through only one side of the touch panel. The routing of the wires respectively passes through opposite sides of the touch panel 100 . In addition, the driving lines in the first region I may pass through the second region II, and the driving lines in the third region III may pass through the fourth region IV. In addition, those skilled in the art can understand that although the touch panel 100 is divided into four areas of the same size in this embodiment, even if the touch surface 100 is divided into four areas non-uniformly, it may still be suitable. In adopting the technology provided by the present invention.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of a touch panel disclosed in another embodiment of the present invention. As shown in FIG. 4, the touch panel 200 is composed of two touch panels 100 disclosed in FIG. The sensing lines in the panel are led out from another opposite direction Y2, thereby forming a large-sized touch panel. In other words, the touch panel 200 can be a panel, and it is divided into eight areas, wherein the sensing lines in the I-IV area are drawn from the direction Y1, and the sensing lines in the V-VIII area are drawn from the direction Y1. It is drawn out in the direction Y2, and the direction Y1 is opposite to the direction Y2.

In addition, those skilled in the art can understand that various elements of the touch panel of the present invention can be arranged on the color filter substrate of the liquid crystal display, such as the protective layer and the color filter arranged on the color filter substrate. Between, so that the LCD monitor has touch function. Alternatively, various elements of the touch panel of the present invention can also be disposed on a separate substrate, thereby forming an independent touch interface.

To sum up, the driving line or the sensing line on the touch panel of the present invention passes through opposite sides of the touch panel respectively, while the other only passes through one side of the touch panel, so that the RC load can be reduced and the signal attenuation.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of an invention shall be determined by the scope of the patent application.

Claims (6)

1. A touch panel, characterized in that, the touch panel is divided into a first area, a second area, a third area and a fourth area, and the first area and the second area are arranged in one In the first direction, the third area and the fourth area are arranged in the first direction, the first area and the third area are arranged in a second direction, and the second area and the fourth area are arranged in the first direction. The fourth area is arranged in the second direction, the first direction and the second direction are perpendicular to each other, and each of the areas includes: Multiple drive lines; a plurality of sensing lines intersecting with the driving lines; and a plurality of sensing units, the sensing units are arranged in an array, and each of the sensing units is electrically coupled to a corresponding driving line and a corresponding sensing line; Wherein, the routing of one of the driving line and the sensing line in the area passes through opposite sides of the touch panel, and the driving line and the sensing line in the area pass through opposite sides of the touch panel. The other of the two lines passes through one side of the touch panel; the sensing units in each row of each area are connected to the same driving line, and the sensing units in each row in different areas are connected to the driving line and the sensing unit. The measuring lines are all different, the sensing units of each column in each area are connected to the same sensing line, and the sensing units of each column in different areas are connected to different driving lines and sensing lines. 2. The touch panel according to claim 1, wherein the sensing lines in the third area pass through the first area, and the sensing lines in the fourth area through the second area. 3. The touch panel according to claim 1, wherein the driving lines in the first area pass through the second area, and the driving lines in the third area pass through the fourth area. 4. The touch panel according to claim 1, wherein the touch panel is combined with another touch panel according to claim 1 to form another touch panel. 5. The touch panel according to claim 1 or 4, wherein the components of the touch panel are respectively disposed on a color filter substrate of a liquid crystal display. 6 . The touch panel according to claim 5 , wherein the elements of the touch panel are disposed between a protection layer of the color filter substrate and a color filter.

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