TW201537401A - Touch panel - Google Patents

Abstract

A touch panel including a substrate, a color-filter array and a touch-sensing electrode structure is provided. The substrate has a first surface and a second surface opposite to the first surface. The color-filter array is disposed on a first surface of the substrate, wherein the color-filter array includes a plurality of color-filter units and a black matrix. The color-filter units are arranged on the first surface in array. The black matrix is disposed on the first surface and separates the color-filter units. The touch-sensing electrode structure is disposed at a side of the substrate, and the normal projections of the touch-sensing electrode structure on the substrate are at least overlapped with the normal projection of the black matrix on the substrate.

Description

Touch panel

The present invention relates to a panel, and more particularly to a touch panel.

In recent years, with the rapid development and application of information technology, wireless mobile communication and information appliances, many information products have been input devices such as traditional keyboards or mice for the purpose of being more convenient, lighter and more humanized. It was changed to use a touch panel as an input device. The touch panel can be roughly divided into a resistive touch panel, a capacitive touch panel, an optical touch panel, an acoustic wave touch panel, and an electromagnetic touch panel according to different sensing forms. Since capacitive touch panels have advantages such as fast response time, good reliability, and high definition compared with other types of touch panels, they are widely used in various types of handheld electronic devices.

In addition to the transparent conductive material (for example, indium tin oxide (ITO)), the existing touch technology is also made into a transparent electrode, and some touch technologies are made into a mesh electrode by using a conductive material. Reduce the electrode impedance. A grid electrode that is typically applied to a touch panel has a specific grid shape and period, such as A rectangular grid or a hexagonal grid of uniform size. Therefore, when such a touch panel is applied to a display device, the grid electrode of the touch panel overlaps with the pixel structure having a specific period in the display device, so that the display device generates bright and dark stripes, that is, moiré. effect. At this time, the light and dark stripes of the display device are easily perceived by the user with the naked eye, thereby affecting the visual effect of the display device.

Although some techniques have been used to improve the moiré effect of a touch panel having a grid electrode, for example, the period of the grid electrode is adjusted according to the period of the pixel structure, or the pixel structure is rotated relative to the display device. Grid electrode. However, in the face of display devices of various pixel sizes, the above techniques must be redesigned for a single display device, increasing the manufacturing cost, and it is difficult to predict whether the moiré effect can be effectively improved after the design is changed.

The present invention provides a touch panel capable of improving the moiré effect when applied to a display device.

The touch panel of the present invention comprises a substrate, a color filter array and a touch electrode structure. The substrate has a first surface and a second surface opposite the first surface. The color filter array is disposed on the first surface of the substrate, wherein the color filter array comprises a plurality of color filter units and a black matrix. The color filter units are arrayed on the first surface. The black matrix is disposed on the first surface and separates the color filter unit. The touch electrode structure is disposed on one side of the substrate, and the orthographic projection of the touch electrode structure on the substrate overlaps at least the orthographic projection of the black matrix on the substrate.

In an embodiment of the invention, the touch electrode structure includes a plurality of first electrode units and a plurality of second electrode units. Each of the first electrode units includes a plurality of first grid electrodes and a plurality of first connecting lines connected in series with the first grid electrode in a first direction, and each of the second electrode units includes a second grid electrode and a first Connecting a second connection line of the second grid electrode in one direction, and the first grid electrode of the first electrode unit and the first grid line and the second grid electrode and the second connection line of the second electrode unit are on the substrate The orthographic projection overlaps the orthographic projection of the black matrix on the substrate.

In an embodiment of the invention, each of the first grid electrodes and each of the second grid electrodes includes a plurality of grid lines, and a line width of each grid line and a line width of each of the first connection lines are less than or equal to The black matrix is used to separate the spacing between the plurality of openings of the color filter unit.

In an embodiment of the invention, each of the first grid electrodes and each of the second grid electrodes is formed by a grid line in a mesh pattern.

In an embodiment of the invention, each of the first grid electrodes and each of the second grid electrodes is formed by a grid line in a frame pattern.

In an embodiment of the invention, the first electrode unit and the second grid electrode are disposed on the second surface of the substrate.

In an embodiment of the invention, the first electrode unit and the second grid electrode are disposed on a black matrix on the first surface.

In an embodiment of the invention, the material of the first electrode unit and the second grid electrode comprises a metal.

In an embodiment of the invention, the touch electrode structure includes a plurality of a first electrode unit and a plurality of second electrode units. Each of the first electrode units is disposed on a side of the substrate along a first direction, and each of the second electrode units is disposed on a side of the substrate along a second direction, the second direction is different from the first direction, and the first electrode and the second electrode are The electrodes are electrically insulated from each other.

In an embodiment of the invention, each of the first electrode units includes a plurality of first grid electrodes and a plurality of first connecting lines connected in series with the first grid electrode in the first direction, and each of the first electrode units The orthographic projection of the first grid electrode and the first connection line on the substrate overlaps the orthographic projection of the black matrix on the substrate.

In an embodiment of the invention, each of the first grid electrodes includes a plurality of grid lines. The line width of each grid line and the line width of each of the first connecting lines are less than or equal to the spacing between the plurality of openings of the black matrix for separating the color filter units.

In an embodiment of the invention, each of the first grid electrodes is formed by a grid line in a mesh pattern.

In an embodiment of the invention, each of the first grid electrodes is formed of a grid pattern by a grid line.

In an embodiment of the invention, the first electrode unit is disposed on the first surface of the substrate in the first direction and is located on the black matrix, and the second electrode unit is disposed on the second surface of the substrate in the second direction. on.

In an embodiment of the invention, the touch electrode structure further includes an insulator disposed between the first electrode unit and the second electrode unit. The first electrode unit is disposed on the insulator, and the second electrode unit is disposed on the second surface of the substrate.

In an embodiment of the invention, the touch electrode structure further includes a The insulator is disposed between the first electrode unit and the second electrode unit. The first electrode unit is disposed on the insulator, and the second electrode unit is disposed on the first surface of the substrate.

In an embodiment of the invention, each of the second electrode units includes a plurality of second electrodes and a plurality of second connecting lines connected in series with the second electrode in the second direction, and the second electrode unit is positive on the substrate The projection is superimposed on the orthographic projection of the color filter unit on the substrate.

In an embodiment of the invention, the material of the second electrode unit comprises a transparent conductive material.

In an embodiment of the invention, each of the second electrode units includes a plurality of second grid electrodes and a plurality of second connection lines connected in series in the second direction to the second grid electrode, and each of the second electrode units The orthographic projection of the second grid electrode and the second connection line on the substrate overlaps the orthographic projection of the black matrix on the substrate.

In an embodiment of the invention, the material of the second electrode unit comprises an opaque conductive material.

In an embodiment of the invention, the touch electrode structure further includes a plurality of insulators. Each of the first electrode units includes a plurality of first grid electrodes and a plurality of first connection lines connected in series with the first grid electrode in the first direction, and each of the second electrode units includes a plurality of second grid electrodes and A plurality of second connecting lines of the second grid electrode are serially connected in two directions. The first grid electrode and the second grid electrode are disposed on the first surface of the substrate, and the insulator is disposed between the first connection line and the second connection line.

In an embodiment of the invention, the touch electrode structure further includes a plurality of insulators. Each of the first electrode units includes a plurality of first grid electrodes and a string along the first direction And connecting a plurality of first connecting lines of the first grid electrode, and each of the second electrode units includes a plurality of second grid electrodes and a plurality of second connecting lines connected in series in the second direction to the second grid electrode. The first grid electrode and the second grid electrode are disposed on the second surface of the substrate, and the insulator is disposed between the first connection line and the second connection line.

In an embodiment of the invention, each of the second grid electrodes includes a plurality of grid lines. The line width of each of the grid lines and the line width of each of the second connecting lines are less than or equal to the spacing between the plurality of openings of the black matrix for separating the color filter units.

In an embodiment of the invention, each of the second grid electrodes is formed of a grid pattern by grid lines.

In an embodiment of the invention, each of the second grid electrodes is formed of a grid pattern by a grid line.

In an embodiment of the invention, the material of the first electrode unit and the second electrode unit includes a metal.

Based on the above, the touch panel of the present invention has a color filter array and a touch electrode structure disposed on the substrate, wherein the color filter array includes a plurality of color filter units and a black matrix separating the color filter units, and the touch The orthographic projection of the electrode structure on the substrate at least overlaps the orthographic projection of the black matrix on the substrate. When the touch panel is applied to the display device, the touch electrode structure is shielded by the black matrix without generating bright and dark stripes with the pixel structure corresponding to the color filter array. Accordingly, the touch panel of the present invention can improve the moiré effect when applied to a display device.

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

100, 100a, 200, 200a to 200e‧‧‧ touch panels

110, 210‧‧‧ substrate

120, 220‧‧‧ color filter array

130, 130a, 230, 230a to 230e‧‧‧ touch electrode structure

132, 232‧‧‧ first electrode unit

132a, 232a‧‧‧ first grid electrode

132b, 232b‧‧‧ first cable

134, 234‧‧‧ second electrode unit

134a, 234c‧‧‧ second grid electrode

134b, 234b, 234d‧‧‧ second cable

234a‧‧‧second electrode

236, 236a‧‧‧ insulator

B, G, R‧‧‧ color filter unit

BM‧‧‧Black Matrix

D1‧‧‧ first direction

D2‧‧‧ second direction

L‧‧‧ grid lines

S1‧‧‧ first surface

S2‧‧‧ second surface

1 is a plan view of a touch panel according to a first embodiment of the present invention.

2 is a cross-sectional view of the touch panel of FIG. 1 taken along line A-A'.

3 is a cross-sectional view showing a touch panel of a second embodiment of the present invention.

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

FIG. 5 is a cross-sectional view of the touch panel of FIG. 4 taken along line B-B'.

Fig. 6 is a plan view showing a touch panel of a fourth embodiment of the present invention.

Figure 7 is a cross-sectional view of the touch panel of Figure 6 taken along line C-C'.

8 is a cross-sectional view showing a touch panel of a fifth embodiment of the present invention.

9 is a cross-sectional view showing a touch panel of a sixth embodiment of the present invention.

Figure 10 is a cross-sectional view showing a touch panel of a seventh embodiment of the present invention.

Figure 11 is a cross-sectional view showing a touch panel of an eighth embodiment of the present invention.

1 is a plan view of a touch panel according to a first embodiment of the present invention. 2 is a cross-sectional view of the touch panel of FIG. 1 taken along line A-A'. Referring to FIG. 1 and FIG. 2 , in the embodiment, the touch panel 100 includes a substrate 110 , a color filter array 120 , and a touch electrode structure 130 . The substrate 110 has a first surface S1 and a second surface S2 with respect to the first surface S1. The color filter array 120 is disposed on the first surface S1 of the substrate 110, wherein the color filter array 120 includes a plurality of color filter units R, G, and B. And the black matrix BM, wherein the substrate 110 can be a color filter substrate, and the touch electrode structure 130 is disposed on the second surface S2 of the color filter substrate. As such, the touch panel 100 can be used with a display device (not shown) to display a display device having a touch function. When the touch panel 100 is applied to a display device, the color filter array 120 of the touch panel 100 corresponds to a pixel structure of the display device, wherein the pixel structure is usually fabricated on an active device substrate, and the The plurality of pixel electrodes in the prime structure respectively correspond to the color filter units R, G, and B, and are respectively driven by the plurality of active elements to cause the display device to display an image. The technology for displaying the image on the display device can adopt the related related art, and will not be described here. At this time, since the pixel electrodes correspond to the color filter units R, G, and B, the display device to which the touch panel 100 is applied can display the color image.

Specifically, the color filter units R, G, and B are arrayed on the first surface S1. The black matrix BM is disposed on the first surface S1 and separates the color filter units R, G, and B, wherein the color filter unit R is a red filter film, the color filter unit G is a green filter film, and the color filter is colored. Unit B is a blue filter film. In other words, the black matrix BM can be regarded as having a plurality of openings arranged in a matrix, and the color filter units R, G, and B are respectively disposed in the openings to achieve the purpose of staggering and separating from each other. The present invention does not limit the arrangement of the color filter units R, G, and B, nor the type of the color filter unit.

On the other hand, in the present embodiment, the touch electrode structure 130 is disposed on the second surface S2 of the substrate 110, and the orthographic projection of the touch electrode structure 130 on the substrate 110 overlaps at least the black matrix BM on the substrate 110. Orthographic projection. in particular, The touch electrode structure 130 of the present embodiment is, for example, a single layer solution (OLS) touch structure, which includes a plurality of first electrode units 132 and a plurality of second electrode units 134, wherein the first electrode unit 132 and the first The two electrode unit 134 is disposed on the second surface S2 of the substrate 110. Furthermore, each of the first electrode units 132 of the touch electrode structure 130 of the present embodiment includes a plurality of first grid electrodes 132a and a first connection line 132b connected in series with the first grid electrode 132a along the first direction D1. Each of the second electrode units 134 includes a second grid electrode 134a and a second connection line 134b that connects the second grid electrode 134a in the first direction D1. The first connecting line 132b is not limited to be connected in series with the plurality of first grid electrodes 132a as shown in FIG. 1, and may be separately connected to the single first grid electrode 132a. Similarly, the second connection line 134b is not limited to being separately connected to the single second grid electrode 134a as shown in FIG. 1, and may also be connected in series with the plurality of second grid electrodes 134a. Therefore, in the present embodiment, the plurality of first grid electrodes 132a connected in series are regarded as driving electrodes, and the independent second grid electrodes 134a are regarded as sensing electrodes, and vice versa. In other words, the plurality of first connecting lines 132b may be designed to connect one or more first grid electrodes 132a to correspondingly constitute a plurality of first electrode units 132, and the plurality of second connecting lines 134b may be configured according to actual needs. Actually, it is designed to connect one or more second grid electrodes 134a to correspondingly constitute a plurality of second electrode units 134. The first grid electrode 132a and each of the second grid electrodes 134a include a plurality of grid lines L, and the first grid electrode 132a and the second grid electrode 134a respectively form a mesh pattern by the grid lines L. And have multiple grids, as shown in Figure 1. However, in other embodiments not shown, each of the first grid electrode 132a and each of the second grid electrodes 134a may also form a frame pattern by the grid lines L, and only have a frame pattern. A grid. The present invention does not limit the number of grids of the first grid electrode 132a and the second grid electrode 134a.

In addition, in the present embodiment, the touch panel 100 configured with the color filter array 120 and the touch electrode structure 130 is generally applied to a display device (not shown) having a pixel structure as described above for display. The device has a touch function. On the other hand, the materials of the first grid electrode 132a and the first connection line 132b for forming the first electrode unit 132 and the second grid electrode 134a and the second connection line 134b of the second electrode unit 134 are usually not The light-transmissive conductive material is, for example, metal or other suitable opaque conductive material. The metal comprises at least one of silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), titanium (Ti), molybdenum (Mo), a composite laminate of the above materials or an alloy of the above materials. . For example, the composite laminate is a three-layer structure of molybdenum/aluminum/molybdenum or indium tin oxide/silver/indium tin oxide. At this time, the arrangement of the first electrode unit 132 and the second electrode unit 134 may interfere with the arrangement of the pixel electrodes. When the pixel electrode having a specific arrangement period interferes with the first electrode unit 132 having a specific arrangement period, the display device easily generates bright and dark stripes and affects the visual effect. Therefore, in order to prevent the display device from being in the above state, the first grid electrode 132a of the first electrode unit 132 and the first connection line 132b of the first electrode unit 132 and the second grid electrode 134a and the second connection line of the second electrode unit 134 of the present embodiment The orthographic projection of 134b on substrate 110 overlaps the orthographic projection of black matrix BM on substrate 110. Further, from the top view of FIG. 1, the orthogonal projection of the grid line L of the first grid electrode 132a and the first connection line 132b on the substrate 110 completely overlaps the orthographic projection of the black matrix BM on the substrate 110. And the grid line L of the second grid electrode 134a and the second connection line 134b are at the base The orthographic projection on the plate 110 completely overlaps the orthographic projection of the black matrix BM on the substrate 110, wherein the line width of the grid line L of the first grid electrode 132a and the line width of the first connection line 132b are less than or equal to the black matrix BM. The spacing between the plurality of openings for separating the color filter units R, G, B, that is, the width of the black matrix BM at each portion, and the grid line L of the second grid electrode 134a are also the same. Preferably, the line width of the grid line L is between 0.5 μm and 15 μm. The black matrix BM (Black Matrix) has a light-shielding region width of between 4 μm and 15 μm. As such, when the touch panel 100 is applied to the display device, the first grid electrode 132a, the first connection line 132b, the second grid electrode 134a, and the second connection line 134b are shielded by the black matrix BM, and the corresponding The pixel structure of the color filter array 120 generates bright and dark stripes to affect the visual effect, so that the touch panel 100 of the embodiment can improve the moiré effect.

3 is a cross-sectional view showing a touch panel of a second embodiment of the present invention. Referring to FIG. 1 and FIG. 3 , in the present embodiment, the touch panel 100 a has a similar structure to the touch panel 100 illustrated in FIGS. 1 and 2 , and a top view thereof may be referred to FIG. 1 . The main difference between the touch panel 100a and the touch panel 100 is that the position of the touch electrode structure 130a is different from the position of the touch electrode structure 130. For other components, reference may be made to the description of the touch panel 100, and details are not described herein. Specifically, in the embodiment, the touch electrode structure 130a is disposed on the first surface S1 of the substrate 110 and is located on the black matrix BM. The touch electrode structure 130a is, for example, a single-layer electrode type touch structure, and includes a plurality of first electrode units 132 and a plurality of second electrode units 134, wherein the first electrode unit 132 and the second electrode unit 134 are disposed on the first substrate 110. The black matrix BM on the surface S1 can be regarded as being disposed on the substrate 110 and the color filter. The inside of the color filter substrate formed by the light array 120. Similarly, the orthographic projection of the first grid electrode 132a of the first electrode unit 132 and the first connection line 132b on the substrate 110 overlaps the orthographic projection of the black matrix BM on the substrate 110, and the network of the second grid electrode 134a The orthographic projection of the ruled line L and the second connection line 134b on the substrate 110 completely overlaps the orthographic projection of the black matrix BM on the substrate 110. As such, when the touch panel 100a is applied to the display device, the first grid electrode 132a, the first connection line 132b, the second grid electrode 134a, and the second connection line 134b of the touch electrode structure 130a are shielded by the black matrix BM. The light-dark fringes are not generated with the pixel structure corresponding to the color filter array 120 to affect the visual effect, so that the touch panel 100a of the present embodiment can improve the moiré effect. It can be seen from the above two embodiments that the first electrode unit 132 and the second electrode unit 134 of the selected touch electrode structure are not disposed on the first surface S1 or the second surface S2.

4 is a plan view of a touch panel of a third embodiment of the present invention. FIG. 5 is a cross-sectional view of the touch panel of FIG. 4 taken along line B-B'. Referring to FIG. 4 and FIG. 5 , in the embodiment, the touch panel 200 includes a substrate 210 , a color filter array 220 , and a touch electrode structure 230 . For details of the substrate 210 and the color filter array 220, reference may be made to the foregoing description of the substrate 110 and the color filter array 120, and details are not described herein. The main difference between the touch panel 200 and the touch panels 100 and 100a is that the touch electrode structure 230 includes a plurality of first electrode units 232 and a plurality of second electrode units 234. Each of the first electrode units 232 is disposed on one side of the substrate 210 in the first direction D1, for example, the first surface S1 of the substrate 210, and is located on the black matrix BM, and each of the second electrode units 234 is disposed in the second direction D2. One of the substrates 210 The side, for example, is on the second surface S2 of the substrate 210, wherein the second direction is different from the first direction, and the first electrode and the second electrode are electrically insulated from each other. Therefore, in the embodiment, the first electrode unit 232 can be regarded as being disposed inside the color filter substrate composed of the substrate 210 and the color filter array 220, and the second electrode unit 234 can be regarded as being disposed in the color filter. The outside of the light substrate.

In this embodiment, each of the first electrode units 232 of the touch electrode structure 230 includes a plurality of first grid electrodes 232a and a plurality of first connection lines 232b connected in series with the first grid electrode 232a in the first direction D1. Each of the first grid electrodes 232a includes a plurality of grid lines L, and each of the first grid electrodes 232a may be a mesh pattern formed by grid lines L as shown in FIG. 4, or may be a grid line L. A frame type pattern having only an outer frame is formed. In addition, the line width of the grid line L of each of the first grid electrodes 132a and the line width of each of the first connection lines 132b are less than or equal to the plurality of openings of the black matrix BM for separating the color filter units R, G, and B. The spacing between the black matrixes BM at the respective portions is such that the orthographic projection of the first grid electrode 232a and the first connection line 232b of each of the first electrode units 232 on the substrate 210 overlaps the black matrix BM on the substrate. Orthographic projection on 210. The difference between the first electrode unit 232 and the first electrode unit 132 shown in FIG. 1 and FIG. 2 is that the shape of the first grid electrode 232a and the first grid electrode 132a are different, so the specific content of the first electrode unit 232 remains. Reference may be made to the foregoing description of the first electrode unit 132, and no further details are provided herein. In addition, each of the second electrode units 234 of the present embodiment includes a plurality of second electrodes 234a and a plurality of second connection lines 234b connected in series with the second electrodes 234a in the second direction D2, and the second electrode units 234 are on the substrate 210. The orthographic projection overlaps the orthographic projection of the color filter units R, G, B on the substrate. As such, the touch panel 200 can be sensed by a change in capacitance between the first electrode unit 232 and the second electrode unit 234 that extend in the first direction D1 and the second direction D2, respectively. At this time, the first electrode unit 232 and the second electrode unit 234 are respectively located on opposite surfaces of the substrate 210 , so the first electrode unit 232 and the second electrode unit 234 can be electrically insulated from each other by the substrate 210 .

In this embodiment, the material of the second electrode 234a and the second connection line 234b of the second electrode unit 234 includes a transparent conductive material, such as indium tin oxide (ITO) or other suitable transparent conductive material such as nanowire. , terpene, graphene or a composite layer of the above materials. Since the second electrode unit 234 is made of a transparent conductive material, the second electrode 234a of the second electrode unit 234 is not limited to be formed into a grid like the first grid electrode 232a, and is shielded by the black matrix BM. Grid line L. In other words, the second electrode 234a of the second electrode unit 234 of the present embodiment may be a sheet electrode, and its orthographic projection on the substrate 210 may overlap the orthographic projection of the color filter unit R, G, B on the substrate 210. . Further, the side of the second electrode 234a is not limited to being formed in a zigzag shape as shown in FIG. 4, and it may be formed in a straight line shape. Furthermore, the second connection line 234b for connecting the second electrodes 234a in series is not limited to be corresponding to the black matrix BM. In other words, since the second electrode unit 234 of the present embodiment is made of a transparent conductive material, the arrangement position thereof has less influence on the visual effect after the touch panel 200 is applied to the display device, so that the shape and position can be adjusted according to requirements. . As such, when the touch panel 200 is applied to the display device, the first grid electrode 232a and the first connection line 232b made of the opaque conductive material are shielded by the black matrix BM, so that the touch panel of the embodiment 200 can improve the moiré effect.

Fig. 6 is a plan view showing a touch panel of a fourth embodiment of the present invention. Figure 7 is a cross-sectional view of the touch panel of Figure 6 taken along line C-C'. Referring to FIG. 6 and FIG. 7 , in the present embodiment, the touch panel 200 a has a similar structure to the touch panel 200 , and the main difference is that the touch electrode structure 230 a of the touch panel 200 a is different from the touch panel 200 . Touch electrode structure 230. Specifically, in this embodiment, the second electrode unit 234 of the touch electrode structure 230a includes a plurality of second grid electrodes 234c and a plurality of second connections connected in series with the second grid electrode 234c in the second direction D2. Line 234d. Further, the second electrode unit 234 of the present embodiment is formed in a grid-like second grid electrode 234c by a structure similar to that of the first electrode unit 232. That is, each of the second grid electrodes 234c of the second electrode unit 234 includes a plurality of grid lines L, and it may constitute a mesh pattern or a frame pattern by the grid lines L. At this time, the material of the second grid electrode 234c and the second connection line 234d of the second electrode unit 234 may also refer to the first electrode unit 232 and adopt an opaque conductive material, such as metal or other suitable opaque material. Conductive material. Therefore, in order to avoid affecting the visual effect after the touch panel 200a is applied to the display device, the line width of the grid line L of each second grid electrode 234c of the present embodiment and the line width of each second connection line 234d are less than or equal to The black matrix BM is used to separate the spacing between the plurality of openings of the color filter units R, G, B, that is, the width of the black matrix BM at each portion, so that the second network of the second electrode unit 234 of the present embodiment The orthographic projection of the grid electrode 234c and the second connection line 234d on the substrate 210 overlaps the orthographic projection of the black matrix BM on the substrate 210. As such, when the touch panel 200a is applied to the display device, the first grid electrode 232a, the first connection line 232b, and the second grid electrode are made of the opaque conductive material. The 234c and the second connection line 234d are shielded by the black matrix BM, so that the touch panel 200a of the present embodiment can improve the moiré effect.

However, the present invention does not limit that the second grid electrode 234c and the second connection line 234d of the second electrode unit 234 need to be made of an opaque conductive material like the first electrode unit 232. In other embodiments, the second grid electrode 234c and the second connection line 234d which are formed in a grid shape may also be made of a transparent conductive material. In other words, the second electrode 234a made of the transparent conductive material described above can also be formed in a grid shape. At this time, the second grid electrode 234c and the second connection line 234d made of a transparent conductive material may correspond to the black matrix BM as shown in FIG. 6, or may not correspond to the black matrix BM as shown in FIG. That is, the second grid electrode 234c and the second connection line 234d made of a transparent conductive material are not limited to be arranged corresponding to the black matrix BM, and the shape and position thereof can be adjusted as needed.

FIG. 8 is a cross-sectional view of the touch panel of the fifth embodiment of the present invention. FIG. 8 is a top view of the touch panel of FIG. 6 along line C-C'. Referring to FIG. 6 and FIG. 8 , in the present embodiment, the touch panel 200b has a similar structure to the touch panels 200 and 200a, and the main difference is that the touch electrode structure 230b of the touch panel 200b is different from the touch panel 200b. Control electrode structures 230 and 230a. Specifically, in the embodiment, the touch electrode structure 230b further includes an insulator 236, wherein the first electrode unit 232 and the second electrode unit 234 are both disposed on the second surface S2 of the substrate 210 (can be regarded as being disposed by The substrate 210 and the outer side of the color filter substrate formed by the color filter array 220 are disposed between the first electrode unit 232 and the second electrode unit 234. Among them, when When the material of the first electrode unit 232 and the second electrode unit 234 is an opaque conductive material, the first grid electrode 232a, the first connection line 232b, the second grid electrode 234c and the second connection line 234d are on the substrate 210. The orthographic projection overlaps the orthographic projection of the black matrix BM on the substrate 210, as shown in FIG. 6 and FIG. 8, to prevent the touch panel 200b from being applied to the display device to affect the visual effect of the display device. When the material of the first electrode unit 232 is an opaque conductive material and the material of the second electrode unit 234 is a transparent conductive material, the orthographic projection of the first grid electrode 232a and the first connection line 232b on the substrate 210 overlaps The black matrix BM is orthographically projected on the substrate 210, and the second grid electrode 234c and the second connection line 234d are not limited to their arrangement positions, which may be as shown in the second electrode 234a and the second connection line 234b of FIG. Show. Similarly, the second electrode unit 234 of the touch electrode structure 230b of the embodiment may also adopt a combination of the second electrode 234a and the second connection line 234b as shown in FIG. 4, and the second electrode 234a may be a chip electrode. Or grid electrode. It can be seen that when the second electrode unit 234 is made of a transparent conductive material, the present invention does not limit its position to correspond to the black matrix BM, and does not limit the shape of the electrode, which can be adjusted according to requirements.

Specifically, in the embodiment, the second electrode unit 234 is disposed on the second surface S2 of the substrate 210, the insulator 236 covers the second electrode unit 234 and the second surface S2, and the first electrode unit 232 is disposed on the insulator 236. on. As such, the first electrode unit 232 and the second electrode unit 234 are electrically insulated from each other, and the first electrode unit 232 and the second electrode unit 234 are located on different planes. However, in other embodiments, the positions of the first electrode unit 232 and the second electrode unit 234 may also be reversed, for example, the first electrode unit 232 is disposed on the second surface S2, and the insulator 236 is covered. The first electrode unit 232 is disposed on the second surface S2, and the second electrode unit 234 is disposed on the insulator 236. Since the first electrode unit 232 and the second electrode unit 234 of the embodiment are located on opposite sides of the insulator 236, the first electrode unit 232 and the second electrode unit 234 are generally fabricated in different process steps. However, the invention is not limited to the embodiments described above.

FIG. 9 is a cross-sectional view of the touch panel of the sixth embodiment of the present invention. FIG. 9 is a top view of the touch panel of FIG. 6 along line D-D'. Referring to FIG. 6 and FIG. 9 , in the embodiment, the touch panel 200c has a similar structure to the touch panel 200b described above, and the main difference is that the insulator 236 in FIG. 8 is completely covered first. The electrode unit 232 and the second surface S2 are taken as an example. The insulator 236a of the touch panel 200c of the present embodiment covers only the intersection of the first electrode unit 232 and the second electrode unit 234, that is, the first connection line 232b and the second. Between the connection lines 234d. Specifically, the touch electrode structure 230c of the present embodiment further includes a plurality of insulators 236a, wherein the cross-sectional view of FIG. 9 is illustrated by one of the insulators 236a. In this embodiment, the first grid electrode 232a and the second grid electrode 234c (not shown in the cross-sectional view of FIG. 9) are disposed on the second surface S2 of the substrate 210, and the plurality of insulators 236a are respectively disposed in the corresponding Between the first connection line 232b and the second connection line 234d. Further, the second connection line 234d of the present embodiment is disposed on the second surface S2 and connected to the adjacent two second grid electrodes 234c, and the insulator 236a is correspondingly covered on the second connection line 234d, and the first connection line 232b It is disposed on the insulator 236a and connects the adjacent two first grid electrodes 232a, and the first connection line 232b spans the second connection line 234d. So, first The electrode unit 232 and the second electrode unit 234 are substantially in the same plane, and the first connection line 232b and the second connection line 234d are separated by the insulator 236 to electrically insulate the first electrode unit 232 and the second electrode unit 234 from each other. .

In addition to the above-described configuration, the first electrode unit 232 and the second electrode unit 234 shown in FIG. 6 may have other configurations. FIG. 10 is a cross-sectional view of the touch panel of the seventh embodiment of the present invention. FIG. 10 is a cross-sectional view of the touch panel of FIG. 6 along line D-D'. Referring to FIG. 6 and FIG. 10 , in the embodiment, the touch panel 200 d has a similar structure to the touch panel 200 c , and the main difference is that the touch electrode structure 230 d of the touch panel 200 d is different from the touch. Electrode structure 230c. In the first electrode unit 232 and the second electrode unit 234 of the touch panel 200d of the present embodiment, the first grid electrode 232a and the second grid electrode 234c (not shown in the cross-sectional view of FIG. 10) are disposed on On the second surface S2 of the substrate 210, the plurality of insulators 236a are respectively disposed between the corresponding first connecting lines 232b and the second connecting lines 234d, but the positions of the first connecting lines 232b and the second connecting lines 234d are different from the foregoing implementation. example. Further, the first connection line 232b of the embodiment is disposed on the second surface S2 and connects the adjacent two first grid electrodes 232a, the insulator 236a covers the first connection line 232b, and the second connection line 234d is disposed. Two adjacent second grid electrodes 234c are connected to the insulator 236a, and the second connection line 234d spans the insulator 236a. As such, the first electrode unit 232 and the second electrode unit 234 can be electrically insulated from each other by separating the first connection line 232b and the second connection line 234d by the insulator 236a. Therefore, the present invention does not limit the first grid electrode 232a, the first connection line 232b, and the second. The order in which the grid electrode 234c and the second connection line 234d are fabricated.

It can be seen from the three embodiments of FIG. 8 to FIG. 10 that when the first electrode unit 232 and the second electrode unit 234 are both disposed on the same surface of the substrate 210 (for example, the second surface S2), the present invention is not limited to the first The structure and fabrication sequence of the electrode unit 232 and the second electrode unit 234. The first electrode unit 232 and the second electrode unit 234 may be disposed on opposite sides of the insulator 236 and located on different planes (as shown in FIG. 8 ), or the first electrode unit 232 may be separated by the patterned insulator 236 a The intersection of the two electrode units 234 (as shown in Figures 9 and 10). In addition, although the foregoing embodiment shown in FIGS. 8 to 10 configures the first electrode unit 232 and the second electrode unit 234 on the second surface S2 of the substrate 210, the present invention is not limited thereto. The first electrode unit 232 and the second electrode unit 234 may also be disposed on the first surface S1 of the substrate 210.

11 is a cross-sectional view of the touch panel of the eighth embodiment of the present invention, wherein FIG. 11 is a top view of the touch panel of FIG. 6 along line C-C'. Referring to FIG. 6 and FIG. 11 , in the present embodiment, the touch panel 200 e has a similar structure to the touch panel 200 b of FIG. 8 , and the main difference is that, in this embodiment, the touch electrode of the touch panel 200 e The first electrode unit 232, the second electrode unit 234 and the insulator 236 of the structure 230e are disposed on the first surface S1 of the substrate 210, and the insulator 236 is disposed between the first electrode unit 232 and the second electrode unit 234, wherein The second grid electrode 234c of the two electrode unit 234 (not shown in the cross-sectional view of FIG. 11) and the second connection line 234d are disposed on the first surface S1 of the substrate 210, and the first grid of the first electrode unit 232 Electrode 232a The first connection line 232b (not shown in the cross-sectional view of FIG. 11) is disposed on the insulator 236. The color filter array 220 is disposed on the touch electrode structure 230e. In other words, the touch electrode structure 230e and the color filter array 220 can be regarded as being disposed on the inner side of the touch panel 200e. Similarly, the first electrode unit 232 and the second electrode unit 234 of the touch electrode structure 230e of the touch panel 200e may also have various types as the first electrode unit 232 and the second electrode unit 234 shown in FIG. 9 to FIG. Structural changes. For example, the first grid electrode 232a and the second grid electrode 234c may be disposed on the first surface S1 of the substrate 210, and the insulator 236a is disposed between the first connection line 232b and the second connection line 234d. The one electrode unit 232 and the second electrode unit 234 are electrically insulated from each other. Therefore, the present invention is not limited to the above embodiments.

In summary, the touch panel of the present invention has a color filter array and a touch electrode structure disposed on the substrate, wherein the color filter array includes a plurality of color filter units and a black matrix separating the color filter units, and The orthographic projection of the touch electrode structure on the substrate overlaps at least the orthographic projection of the black matrix on the substrate. The touch electrode structure has a first electrode unit formed by connecting a plurality of first grid electrodes and a plurality of first connecting lines, and the first grid electrode of the first electrode unit and the first connecting line are on the substrate. The upper orthographic projection overlaps the orthographic projection of the black matrix on the substrate. In addition, the touch electrode structure may further have a second electrode unit, and when the second electrode unit adopts a structure like the first electrode unit, the second grid electrode of the second electrode unit and the second connection line are positive on the substrate. The projection overlaps the orthographic projection of the black matrix on the substrate. As such, when the touch panel is applied to the display device, the first grid electrode, the first connection line, the second grid electrode, and the second connection line of the touch electrode structure are shielded by the black matrix, so that the touch surface is The touch electrode structure of the board does not produce bright and dark stripes with the pixel structure corresponding to the color filter array, which affects the visual effect of the display device. Accordingly, the touch panel of the present invention can improve the moiré effect when applied to a display device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill 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 scope of the appended claims.

100‧‧‧ touch panel

110‧‧‧Substrate

120‧‧‧Color filter array

130‧‧‧Touch electrode structure

132‧‧‧First electrode unit

132b‧‧‧first cable

134‧‧‧Second electrode unit

134a‧‧‧second grid electrode

B, G, R‧‧‧ color filter unit

BM‧‧‧Black Matrix

L‧‧‧ grid lines

S1‧‧‧ first surface

S2‧‧‧ second surface

Claims (26)

A touch panel includes: a substrate having a first surface and a second surface opposite to the first surface; a color filter array disposed on the first surface of the substrate, wherein the color filter The array includes: a plurality of color filter units arranged in an array on the first surface; and a black matrix disposed on the first surface and separating the color filter units; and a touch electrode structure, configured On one side of the substrate, an orthographic projection of the touch electrode structure on the substrate overlaps at least an orthographic projection of the black matrix on the substrate. The touch panel of claim 1, wherein the touch electrode structure comprises a plurality of first electrode units and a plurality of second electrode units, each of the first electrode units comprising a plurality of first grid electrodes and a The first direction is connected to a first connection line of the first grid electrodes, and each of the second electrode units includes a second grid electrode and a second connection connecting the second grid electrode along a first direction a line, and the first grid electrode of the first electrode unit and the first connection line and the second grid electrodes of the second electrode units and the second connection line are positive on the substrate The projection overlaps the orthographic projection of the black matrix on the substrate. The touch panel of claim 2, wherein each of the first grid electrode and each of the second grid electrodes comprises a plurality of grid lines, and a line width of each of the grid lines and each of the first The line width of the connecting line is less than or equal to the spacing between the plurality of openings of the color filter unit. The touch panel of claim 3, wherein each of the first grid electrode and each of the second grid electrodes form a mesh pattern by the grid lines. The touch panel of claim 3, wherein each of the first grid electrode and each of the second grid electrodes form a frame pattern by the grid lines. The touch panel of claim 2, wherein the first electrode unit and the second grid electrodes are disposed on the second surface of the substrate. The touch panel of claim 2, wherein the first electrode unit and the second grid electrodes are disposed on the black matrix on the first surface. The touch panel of claim 2, wherein the materials of the first electrode unit and the second grid electrodes comprise metal. The touch panel of claim 1, wherein the touch electrode structure comprises a plurality of first electrode units and a plurality of second electrode units, and each of the first electrode units is disposed on the substrate along a first direction. On the side, each of the second electrode units is disposed on a side of the substrate along a second direction, the second direction is different from the first direction, and the first electrodes and the second electrodes are electrically insulated from each other. The touch panel of claim 9, wherein each of the first electrode units comprises a plurality of first grid electrodes and a plurality of first connections connected in series with the first grid electrodes in the first direction a line, and an orthographic projection of the first grid electrodes of the first electrode unit and the first connection lines on the substrate overlaps an orthographic projection of the black matrix on the substrate. The touch panel of claim 10, wherein each of the first grid electrodes comprises a plurality of grid lines, a line width of each of the grid lines and each of the first connection lines The line width is less than or equal to the spacing between the plurality of openings of the color filter unit. The touch panel of claim 11, wherein each of the first grid electrodes forms a mesh pattern by the grid lines. The touch panel of claim 11, wherein each of the first grid electrodes forms a frame pattern by the grid lines. The touch panel of claim 10, wherein the first electrode units are disposed on the first surface of the substrate along the first direction and are located on the black matrix, and the second electrodes are The unit is disposed on the second surface of the substrate along the second direction. The touch panel of claim 9, wherein the touch electrode structure further comprises an insulator disposed between the first electrode unit and the second electrode unit, the first electrode unit configuration On the insulator, the second electrode units are disposed on the second surface of the substrate. The touch panel of claim 9, wherein the touch electrode structure further comprises an insulator disposed between the first electrode unit and the second electrode unit, the first electrode unit configuration On the insulator, the second electrode units are disposed on the first surface of the substrate. The touch panel of claim 14, wherein each of the second electrode units comprises a plurality of second electrodes and a plurality of second connecting lines connected in series with the second electrodes in the second direction, and The orthographic projection of the second electrode units on the substrate overlaps the orthographic projection of the color filter units on the substrate. The touch panel of claim 17, wherein the materials of the second electrode units comprise a transparent conductive material. The touch panel of claim 14, wherein each of the second electrode units comprises a plurality of second grid electrodes and a plurality of second connections connected in series along the second direction to the second grid electrodes a line, and an orthographic projection of the second grid electrodes of the second electrode unit and the second connection lines on the substrate overlaps an orthographic projection of the black matrix on the substrate. The touch panel of claim 19, wherein the materials of the second electrode units comprise an opaque conductive material. The touch panel of claim 9, wherein the touch electrode structure further comprises a plurality of insulators, each of the first electrode units comprising a plurality of first grid electrodes and the plurality of first grid electrodes connected in series along the first direction a plurality of first connecting lines of a grid electrode, and each of the second electrode units includes a plurality of second grid electrodes and a plurality of second connecting lines connecting the second grid electrodes in the second direction, The first mesh electrodes and the second mesh electrodes are disposed on the first surface of the substrate, and the insulators are disposed between the first connecting lines and the second connecting lines. The touch panel of claim 9, wherein the touch electrode structure further comprises a plurality of insulators, each of the first electrode units comprising a plurality of first grid electrodes and the plurality of first grid electrodes connected in series along the first direction a plurality of first connecting lines of a grid electrode, and each of the second electrode units includes a plurality of second grid electrodes and a plurality of second connecting lines connecting the second grid electrodes in the second direction, The first grid electrode and the second grid electrodes are disposed on the second surface of the substrate, and the insulators are disposed on the second surface The first connecting lines and the second connecting lines. The touch panel of claim 19, wherein each of the second grid electrodes comprises a plurality of grid lines, and a line width of each of the grid lines and a line width of each of the second connection lines is less than or equal to The black matrix is used to separate the spacing between the plurality of openings of the color filter units. The touch panel of claim 19, wherein each of the second grid electrodes forms a mesh pattern by the grid lines. The touch panel of claim 19, wherein each of the second grid electrodes forms a frame pattern by the grid lines. The touch panel of claim 9, wherein the materials of the first electrode unit and the second electrode units comprise metal.