WO2011072499A1

WO2011072499A1 - Touch control panel

Info

Publication number: WO2011072499A1
Application number: PCT/CN2010/070266
Authority: WO
Inventors: 李俊谊
Original assignee: 深超光电（深圳）有限公司
Priority date: 2009-12-15
Filing date: 2010-01-20
Publication date: 2011-06-23
Also published as: CN101751192A; CN101751192B

Abstract

A touch control panel which comprises a substrate and a plurality of sensing pads is provided. Said sensing pads are arranged on the substrate, wherein two adjacent pads are arranged oppositely in parallel. Each of the sensing pads comprises a central part and a plurality of bulges. The central part comprises a plurality of sides, and the bulges extend from the plurality sides of the central part to exterior. The bulges between the sides of the two adjacent pads are staggered. The distance between any two adjacent pads is equal.

Description

Touch panel

[Technical Field]

The present invention relates to a touch panel, and more particularly to a touch panel having good display uniformity and touch sensitivity.

【Background technique】

Most of the known touch display modules integrate the touch panel with the display panel. Touch panels can be roughly classified into resistive, capacitive, infrared, and ultrasonic touch panels. Among them, resistive touch panels and capacitive touch panels are the most common products. Since the touch display module can provide a more user-friendly operation mode, it is gradually favored by the market.

FIG. 1 is a partial top plan view of a known touch panel. Referring to FIG. 1, the touch panel 100 includes a substrate 102 and a plurality of sensing pads 110. A plurality of sensing pads 110 are disposed on the substrate 102 and spaced apart from each other by a gap S. In addition, the touch panel 100 further includes a plurality of connecting lines (not shown) connecting the plurality of sensing pads 110 to transmit signals to the respective sensing pads 110. For example, when the user touches the touch panel 100 with a finger, a portion of the sensing pad 110 forms a capacitance with the finger at a position touched by the user, thereby causing a change in the signal.

However, since the light transmittance of the sensing pad 110 and the substrate 100 is different, the linear gap S between the plurality of sensing pads 110 causes the touch panel 100 to exhibit a display unevenness (Mura). That is to say, when the user views the touch display device using the touch panel 100, the quality of the display screen is not good.

In this regard, Chinese Patent Application Publication No. CN101131492 proposes a method for improving the uniformity of display of a touch panel, which mainly provides a pseudo pattern between two adjacent sensing pads. In addition, Chinese Patent Application Publication No. CN101126969 proposes a capacitive touch panel having a polygonal sensing pad design. However, Chinese Patent Application Publication No. CN101131492 requires high process precision, and Chinese Patent Application Publication No. CN101126969 does not effectively solve the above problem of display unevenness. Therefore, it is known that how to improve the display uniformity of the touch panel 100 is a problem that needs to be solved currently.

[Summary of the Invention]

The invention provides a touch panel with good display uniformity and touch sensitivity.

The invention provides a touch panel comprising a substrate and a plurality of sensing pads. The plurality of sensing pads are disposed on the substrate, wherein the adjacent two sensing pads are parallel and oppositely arranged, and each of the sensing pads includes a middle portion and a plurality of protruding portions. The intermediate portion has a plurality of sides, and the plurality of projections extend outwardly from the plurality of sides of the intermediate portion. The plurality of raised portions between the two side edges of the two adjacent sensing pads are in an interleaved configuration. The distance between any two adjacent sensing pads is equal.

In an embodiment of the invention, the plurality of protruding portions have the same shape.

In an embodiment of the invention, each of the sensing pads further includes a plurality of concave portions. The plurality of concave portions are recessed inwardly from the plurality of side edges of the intermediate portion, and the plurality of convex portions and the plurality of concave portions of the respective sensing pads are alternately arranged.

In an embodiment of the invention, the plurality of protruding portions have the same shape, and the plurality of concave portions have the same shape.

In an embodiment of the invention, the intermediate portion of each of the sensing pads is a diamond or a square.

In an embodiment of the invention, the plurality of protruding portions of each of the sensing pads comprise a rectangle, a triangle, a trapezoid or a circular arc.

In an embodiment of the invention, the distance between any two adjacent ones of the plurality of sensing pads is about

30~50 microns.

In an embodiment of the invention, the number of the plurality of protruding portions of each of the sensing pads is the same.

In an embodiment of the invention, the material of the plurality of sensing pads is a transparent conductive material. Transparent conductive materials include indium tin oxide or indium oxide.

Based on the above, the sensing pad of the touch panel of the present invention is provided with a plurality of protruding portions such that the edges of the touch pads are saw-toothed, and the plurality of protruding portions are in a staggered configuration. As a result, when the user uses the touch panel, the user may have blurred vision and may not see uneven display. Due to any two touches The distance between the pads is equal, so the capacitance of the touch panel of the present invention is relatively average. Moreover, since the protruding portion increases the area of the touch pad, the touch panel of the present invention can have good touch sensitivity. In addition, the touch display device of the present invention has the touch panel described above, and thus can have a good display effect.

The above described features and advantages of the invention will be apparent from the description and appended claims.

[Description of the Drawings]

FIG. 1 is a partial top plan view of a known touch panel.

FIG. 2 is a partial top plan view of the touch panel in the first embodiment of the present invention.

3 is a partial top plan view of a touch panel in a second embodiment of the present invention.

4 is a partial top plan view of a touch panel in a third embodiment of the present invention.

FIG. 5 is a partial top plan view of a touch panel in a fourth embodiment of the present invention.

6A is a partial top plan view of the touch panel shown in FIG. 1, wherein FIG. 6A covers more of the sensing pads than FIG.

6B is a partial top plan view of the touch panel shown in FIG. 4, wherein FIG. 6B covers more of the sensing pads than FIG. 4.

FIG. 7 is a schematic diagram of a touch display device using the touch panel of the present invention.

【detailed description】

First embodiment

FIG. 2 is a partial top plan view of the touch panel in the first embodiment of the present invention. Referring to FIG. 2, the touch panel 200a includes a substrate 202 and a plurality of sensing pads 210a. In the present embodiment, the substrate 202 is, for example, a hard transparent substrate such as a glass substrate. In other embodiments, the substrate 202 can also be a plastic transparent substrate or other flexible transparent substrate. The material of the sensing pad 210a may be a transparent conductive material such as: indium tin oxide, indium oxide or other suitable transparent conductive material.

The plurality of sensing pads 210a are disposed on the substrate 202, wherein the adjacent two sensing pads are parallel and opposite Arranged, and each of the sensing pads 210a includes a middle portion 212 and a plurality of protruding portions 214a. The intermediate portion 210a has a plurality of sides 215, and the plurality of raised portions 214a extend outwardly from the plurality of sides 215 of the intermediate portion 212. In the touch panel 200a, the intermediate portion 212 of each of the sensing pads 210a is a diamond or a square, but the present invention is not limited thereto. In other embodiments, the intermediate portion 212 of each of the sensing pads 210a can also be other suitable shapes.

In the two adjacent sensing pads 210a, the plurality of convex portions 214a between the two side edges 215 which are parallel to each other and are opposed to each other are in a staggered configuration. That is, between the two side edges 215 that are parallel and opposite each other, the convex portion 214a projected by one of the side edges 215 faces the other side edge 215.

In the touch panel 200a, each of the sensing pads 210a has the same number of convex portions 214a, and the plurality of convex portions 214a have the same shape, for example, a rectangle. A plurality of convex portions 214a protrude from the side edges 215 of the respective sensing pads 210a such that the edges of each of the sensing pads 210a form a zigzag pattern. In this way, when the user views the touch panel 200a, the gap S seen by the user is curved along with the jagged edge of the sensing pad 210a, thereby producing a visual blur effect. Therefore, compared with the known touch panel 100, the user does not see the problem of uneven display on the touch panel 200a.

Since the area of each of the sensing pads 210a is the sum of the intermediate portion 212 and the plurality of protruding portions 214a, the area of the sensing pad 210a of the present embodiment may be larger than the known sensing pad area. As a result, when the user touches the touch panel 200a, the capacitance change of the sensing pad 210a at the touch position on the touch panel 200a is more obvious. That is, the touch panel 200a of the present embodiment can have better touch sensitivity than the known touch panel 100.

In the present embodiment, the plurality of convex portions 214a have the same shape and area, and the distance S between each of the convex portions 214a and the opposite side edges 215 thereof is the same. Briefly, the distance S between any two adjacent sensing pads 210a is equal. In this embodiment, the distance S between any two adjacent sensing pads 210a is about 30 to 50 microns. Since the distance S between any two adjacent sensing pads 210a in the touch panel 200a is equal, the distribution of the capacitance values on the touch panel 200a is not affected by the protruding portion 214a. That is to say, the capacitance value that each of the sensing pads 210a on the touch panel 200a can form is relatively stable and uniform. In addition, a plurality of connecting lines (not shown) for electrically connecting the sensing pads 210a are disposed on the touch panel 200a, and the portions may be designed with different electrical connections as needed. For example, the touch panel 200a can be a capacitive touch panel or a resistive touch panel. On the other hand, the touch panel 200a can also be a single-sided or double-sided touch panel design. Those skilled in the art should understand the operation principle of the touch panel 200a and other component configurations, and details are not described herein again.

Second embodiment

3 is a partial top plan view of a touch panel in a second embodiment of the present invention. Referring to FIG. 3, the touch panel 200b has most of the components of the touch panel 200a, wherein the same components are denoted by the same reference numerals and will not be repeated below.

The main difference between the touch panel 200b and the touch panel 200a is that, in the touch panel 200b, each of the plurality of protruding portions 214b included in each of the sensing pads 210b is triangular. At this time, the distance S between the adjacent two sensing pads 210b is the distance S between the side edges 217 of the adjacent two protruding portions 214b.

Similarly, since the edges of each of the sensing pads 21 Ob are jagged, and the plurality of protruding portions 214b between the two side edges 215 which are parallel to each other and adjacent to each other are in a staggered configuration, the user has a visual blur effect. Therefore, the touch panel 200b can effectively improve the problem of display unevenness. Moreover, since the distance S between any two adjacent sensing pads 210b is the same, the capacitance value distribution on the touch panel 200b will be uniform and stable. Moreover, since the protruding portion 214b can increase the area of the sensing pad 210b, the touch panel 200b can have better touch sensitivity.

Third embodiment

4 is a partial top plan view of a touch panel in a third embodiment of the present invention. Referring to FIG. 4, the touch panel 200c has most of the components of the touch panel 200a, wherein the same components are denoted by the same reference numerals and will not be repeated below.

The main difference between the touch panel 200c and the touch panel 200a is that, in the touch panel 200c, each of the plurality of protruding portions 214c included in each of the sensing pads 210c disposed on the substrate 202 is trapezoidal. For the same reason, the touch panel 200c can achieve all the technical functions of the touch panel 200a or 200b. Effective.

Fourth embodiment

FIG. 5 is a partial top plan view of a touch panel in a fourth embodiment of the present invention. Referring to FIG. 5, the touch panel 200d has most of the components of the touch panel 200a, wherein the same components are denoted by the same reference numerals and will not be repeated below.

The plurality of sensing pads 210d of the touch panel 200d respectively have a plurality of arcuate convex portions 214d. In particular, each of the sensing pads 210d further includes a plurality of recessed portions 216d. The plurality of concave portions 216d are recessed inwardly by the plurality of side edges 215 of the intermediate portion 212, and the plurality of convex portions 214d and the plurality of concave portions 216d of the respective sensing pads 210d are alternately arranged. Further, the plurality of concave portions 216d are, for example, also circular arc shapes. However, the description herein is merely illustrative, and the present invention does not limit the shape or number of the convex portions or the concave portions, and those skilled in the art should change them as needed.

The sensing pads 210a, 210b, 210c, 210d of the touch panels 200a, 200b, 200c, 200d described above are each provided with a plurality of protruding portions 214a, 214b, 214c, 214d such that the sensing pads 210a, 210b, 210c, The 210d edge is jagged and produces a blurring effect, which in turn improves the display unevenness. Moreover, the distance S between any two adjacent sensing pads 210a, 210b, 210c, 210d is equal, so the touch panels 200a, 200b, 200c, 200d can have a good capacitance value distribution. Moreover, since the protruding portions 214a, 214b, 214c, 214d respectively increase the areas of the sensing pads 210a, 210b, 210c, 210d, the touch panels 200a, 200b, 200c, 200d can have better touch sensitivity. In addition, it is worth mentioning that the touch panel of the present invention is relatively easy to manufacture, and the touch panel 200a, 200b, 200c, 200d can be fabricated only by slightly changing the mask design of the sensing pad, and does not need to change the original. How to make it.

In order to clarify the effect of the visual blur achieved by the present invention, the known touch panel will be juxtaposed with the touch panel of the present invention for understanding.

FIG. 6A is a partial top plan view of the touch panel shown in FIG. 1 , wherein FIG. 6A covers more sensing pads than FIG. 1 . FIG. 6B is a partial top plan view of the touch panel shown in FIG. 4 , wherein FIG. 6B covers more sensing pads than FIG. 4 . 6A and 6B, compared to the known touch panel 100, this The touch panel 200c of the invention can produce an effect of visual blurring, thereby improving the problem of display unevenness. FIG. 7 is a schematic diagram of a touch display device using the touch panel of the present invention. Referring to FIG. 7 , the touch display device 300 includes a display panel 310 and a touch panel 320 . The touch panel 320 is disposed on the display panel 310 . In the touch display device 300 of the present embodiment, the display panel 310 is, for example, a liquid crystal display panel, a plasma display panel, or an organic electroluminescence display panel. For example, when the display panel 310 is a liquid crystal display panel, the liquid crystal display panel includes a transmissive liquid crystal display panel, a reflective liquid crystal display panel, a transflective liquid crystal display panel, and other forms of liquid crystal display panels.

In the embodiment illustrated in FIG. 7, the touch panel 320 is, for example, any one of the touch panels 200a, 200b, 200c or 200d in the above embodiment. Since the touch panel 200a, 200b, 200c or 200d can achieve the above-mentioned visual blurring effect and has a large sensing pad area, the touch display device 300 can have good display uniformity and touch sensitivity. That is to say, the touch display device 300 can have a good display effect and handling.

In summary, the sensing pad of the touch panel of the present invention is provided with a plurality of protruding portions arranged in a staggered manner, so that the edges of the sensing pads are sawtoothed to cause visual blur. In other words, users will not see uneven display. Moreover, since the distance between any two touch pads is equal, the capacitance value on the touch panel of the present invention is relatively average and stable. Moreover, since the protruding portion can increase the sensing pad area, the touch panel of the present invention can have better touch sensitivity. Further, the touch panel of the present invention is relatively easy to manufacture, and hardly causes an increase in manufacturing cost. The touch display device of the present invention has the above touch panel, and thus can have a good display effect.

The present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims.

Claims

Rights request

1. A touch panel comprising:

a substrate;

a plurality of sensing pads are disposed on the substrate, and two adjacent sensing pads are parallel and oppositely arranged, and each of the sensing pads comprises:

a middle portion having a plurality of sides;

a plurality of protruding portions extending outward from the plurality of side edges of the intermediate portion, wherein the plurality of protruding portions between the plurality of side edges of the two adjacent ones of the plurality of sensing pads In a staggered configuration, and the distance between any two adjacent ones of the plurality of sensing pads is equal.

2. The touch panel according to claim 1, wherein the plurality of protruding portions have the same shape.

3. The touch panel of claim 1, wherein: each of the sensing pads further comprises a plurality of concave portions recessed inwardly by the plurality of sides of the intermediate portion And the plurality of protruding portions of each of the sensing pads and the plurality of concave portions are alternately arranged.

The touch panel according to claim 3, wherein the plurality of convex portions have the same shape, and the plurality of concave portions have the same shape.

The touch panel according to claim 1, wherein the intermediate portion of each of the sensing pads is a diamond or a square.

The touch panel according to claim 1, wherein the plurality of protruding portions of each of the sensing pads comprise a rectangle, a triangle, a trapezoid or a circular arc.

7. The touch panel of claim 1, wherein: the distance between any two adjacent ones of the plurality of sensing pads is 30 to 50 microns.

The touch panel according to claim 1, wherein the number of the plurality of protruding portions of each of the sensing pads is the same.

9. The touch panel of claim 1, wherein: the materials of the plurality of sensing pads It is a transparent conductive material.

10. The touch panel according to claim 9, wherein the transparent conductive material comprises indium tin oxide or indium oxide.