TWI417601B - Touch panel - Google Patents

Description

Touch panel

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

Most of the conventional 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 view of a conventional touch panel. Referring to FIG. 1 , the touch panel 100 includes a substrate 102 and a plurality of sensing pads 110 . The plurality of sensing pads 110 are disposed on the substrate 102 and separated from each other by a gap S. In addition, the touch panel 100 further includes a plurality of connecting lines (not shown) that connect the plurality of sensing pads 110 , thereby transmitting 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). In other words, when the user views the touch using the touch panel 100 When the device is displayed, the quality of the display screen is not good.

In this regard, Chinese Patent Application 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 No. CN101126969 proposes a capacitive touch panel having a polygonal sensing pad design. However, Chinese patent application number CN101131492 requires higher process precision, and Chinese patent application number CN101126969 does not effectively solve the above problem of display unevenness.

Therefore, how to improve the display uniformity of the touch panel 100 is a problem that needs to be solved urgently.

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 of the two adjacent sensing pads are in a staggered 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 by the plurality of side edges of the intermediate portion, and the plurality of convex portions of the respective sensing pads are alternately arranged with the plurality of concave portions.

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 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 plurality of sensing pads are made of a transparent conductive material. Transparent conductive materials include indium tin oxide or indium zinc 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. Since the distance between any two touch pads is equal, the capacitance value 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.

To make the above features and advantages of the present invention more apparent, the following specific embodiments are provided. The details are as follows with reference to the drawings.

100, 200a, 200b, 200c, 200d, 320‧‧‧ touch panels

202‧‧‧Substrate

210a, 210b, 210c, 210d‧‧‧ sensing pads

212‧‧‧ middle part

214a, 214b, 214c, 214d‧‧‧ protruding parts

216d‧‧‧ recessed part

215, 217‧‧‧ side

300‧‧‧Touch display device

310‧‧‧ display panel

S‧‧‧distance, clearance

FIG. 1 is a partial top view of a conventional touch panel.

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

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

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

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

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

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

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

First embodiment

2 is a partial top plan view of a touch panel according to a first embodiment of the present invention. Referring to FIG. 2 , the touch panel 200 a includes a substrate 202 and a plurality of sensing pads 210 a . 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 zinc 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 flat The rows are arranged in opposite directions, 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 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 two adjacent sensing pads 210a, the plurality of raised portions 214a between the two sides 215 that are parallel and opposite each other are in a staggered configuration. In other words, between the two side edges 215 that are parallel and opposite each other, the convex portion 214a that protrudes from 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 bends along with the jagged edge of the sensing pad 210a, that is, the effect of visual blurring occurs. Therefore, compared with the conventional 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 that of the conventional sensing pad. 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. In other words, the touch panel 200a of the present embodiment can have better touch sensitivity than the conventional 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. In short, 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 will understand the operation principle of the touch panel 200a and other component configurations, and will not be described herein.

Second embodiment

3 is a partial top plan view of a touch panel according to 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 210b are zigzag and are parallel to each other and the plurality of protruding portions 214b between the adjacent two side edges 215 are in a staggered configuration, the user produces 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 according to 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, the plurality of protruding portions 214c included in each of the sensing pads 210c disposed on the substrate 202 are trapezoidal. For the same reason, the touch panel 200c can achieve all the technical effects of the touch panel 200a or 200b described above.

Fourth embodiment

FIG. 5 is a partial top plan view of a touch panel according to 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 concave portions 216d. The plurality of recessed portions 216d are recessed inwardly by the plurality of side edges 215 of the intermediate portion 212, and each of the sensing pads The plurality of convex portions 214d of 210d and the plurality of concave portions 216d are alternately arranged. Further, the plurality of concave portions 216d are also, 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 can change them as needed.

The sensing pads 210a, 210b, 210c, 210d of the above-mentioned touch panels 200a, 200b, 200c, 200d 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 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 convex portions 214a, 214b, 214c, and 214d respectively increase the areas of the sensing pads 210a, 210b, 210c, and 210d, the touch panels 200a, 200b, 200c, and 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, and 200d can be fabricated by simply changing the mask design of the sensing pad, and the original touch panel 200a, 200b, 200c, and 200d need not be changed. How to make it.

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

FIG. 6A is a partial top view of the touch panel illustrated in FIG. 1 , wherein FIG. 6A covers more sensing pads than FIG. 1 . FIG. 6B is a partial top view of the touch panel illustrated in FIG. 4 , wherein FIG. 6B covers more sensing pads than FIG. 4 . As can be seen from FIG. 6A and FIG. 6B, the touch panel 200c of the present invention can produce a visual blur effect compared to the conventional touch panel 100, thereby improving the problem of display unevenness.

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 electroluminescent 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 200 a , 200 b , 200 c , or 200 d 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. In other words, the touch display device 300 can have good display effects and maneuverability.

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 jagged and visual blur is generated. In other words, the user does not see the phenomenon of 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 touch panel described above, 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 one of ordinary skill in the art without departing from the spirit and scope of the present invention. Within the scope of the invention, the scope of protection of the present invention is subject to the definition of the scope of the patent application.

200a‧‧‧ touch panel

202‧‧‧Substrate

210a‧‧‧Sense pad

212‧‧‧ middle part

214a‧‧‧ protruding parts

215‧‧‧ side

S‧‧‧ gap, distance

Claims (8)

A touch panel includes: a substrate; a plurality of sensing pads disposed on the substrate, the two adjacent sensing pads are parallel and oppositely arranged, and each of the sensing pads includes: an intermediate portion The intermediate portion is rhombic or square and has a plurality of sides; and a plurality of protrusions extending outwardly from the sides of the intermediate portion, wherein in the two adjacent ones of the sensing pads The protruding portions between the sides are in a staggered configuration, the distance between any two adjacent sensing pads is equal, and the distance between any two adjacent sensing pads is about It is 30~50 microns. The touch panel of claim 1, wherein the convex portions have the same shape. The touch panel of claim 1, wherein each of the sensing pads further comprises a plurality of concave portions recessed inwardly by the side edges of the intermediate portion, and each The protruding portions of the sensing pad and the concave portions are alternately arranged. The touch panel of claim 3, wherein the convex portions have the same shape, and the concave portions have the same shape. The touch panel of claim 1, wherein the protruding portions of each of the sensing pads comprise a rectangle, a triangle, a trapezoid or a circular arc. The touch panel of claim 1, wherein the number of the protruding portions of each of the sensing pads is the same. The touch panel of claim 1, wherein the sensing pads are made of a transparent conductive material. The touch panel of claim 7, wherein the transparent conductive material comprises indium tin oxide or indium zinc oxide.