TWI584165B - Touch panel and method for forming metal mesh pattern - Google Patents

Description

Touch panel and metal grid pattern forming method

The invention relates to a method for forming a touch panel and a metal grid pattern.

Metal Mesh is a touch technology that sets metal lines with extremely narrow line widths (invisible to the naked eye) into a grid pattern and uses these metal lines to detect the position of the touch object. Compared with Indium Tin Oxide (ITO) electrodes, metal grids have low impedance, low manufacturing cost, good transparency and high flexibility, and are suitable for use on large-size display screens such as notebook computers.

Although the metal mesh has a very thin metal wire and the metal wire itself is opaque, the metal mesh may overlap with the special pattern of the display screen to produce a Moire when the display screen displays a special pattern. A high pixel density (Pixels Per Inch, PPI) metal mesh can avoid the occurrence of moiré, but it may result in different brightness ratios of each pixel due to the shielding of the metal mesh, resulting in uneven display brightness (Mura). Case.

One aspect of the present invention provides a method of forming a touch panel and a metal mesh pattern to avoid uneven display brightness.

According to an embodiment of the invention, a method of forming a metal mesh pattern includes the following steps. First, a mesh substrate is formed, wherein each mesh base unit of the mesh substrate has a square shape, the mesh base unit is aligned with the adjacent mesh base unit, and the side length of the mesh base unit and the corresponding display panel Each pixel has the same length and length. Next, each grid base unit is divided into a plurality of first grid base units and a plurality of second grid base units, and the first grid base unit and the second grid base unit are alternately arranged. Then, a first generated square is formed in each of the first mesh base units, wherein each first generated square has the same first tilt angle with each of the first mesh base units, and each first The first vertex, the second vertex, the third vertex, and the fourth vertex of the generated square are respectively connected to the top side, the left side, the right side, and the bottom side of each of the first grid base units. Then, a second generated square is formed in each of the second mesh base units, wherein each of the second generated squares has the same second tilt angle with each of the second mesh base units, and the first tilt angle is The second tilt angles are equal in magnitude and opposite in direction, and the first vertex, the second vertex, the third vertex, and the fourth vertex of each second generated square are respectively connected to the top edge and the left edge of each second grid base unit, Right side and bottom side. Finally, by connecting the first vertex and the second vertex of each first generated square, the second vertex and the fourth vertex of each first generated square, the first vertex and the third vertex of each second generated square, and The third vertices and the fourth vertices of each of the second generated squares form a first metal grid pattern.

In one or more embodiments of the invention, the first angle of inclination is from 30 degrees to 60 degrees.

In one or more embodiments of the invention, the first angle of inclination is from 30 degrees to 40 degrees.

In one or more embodiments of the present invention, the first metal mesh pattern includes a plurality of first metal mesh pattern units, each of the first metal mesh pattern units having eight sides connected to each other, and the sides The length is the same.

In one or more embodiments of the present invention, the first tilt angle is θ ₁ , the side length of the grid base unit is B, and the length of the side of the first metal grid pattern unit is L ₁ , the grid base and the A metal grid style satisfies the following relationships:

In one or more embodiments of the present invention, the forming method further comprises: connecting the first vertex and the third vertex of each of the first generated squares, the third vertex and the fourth vertex of each of the first generated squares, each A first vertices and a second vertices of the second generated square and second vertices and fourth vertices of each of the second generated squares form a second metal grid pattern.

In one or more embodiments of the present invention, the second metal mesh pattern includes a plurality of second metal mesh pattern units, each of the second metal mesh pattern units having eight sides connected to each other, and the sides The length is the same.

In one or more embodiments of the present invention, the second tilt angle is θ ₂ , the side length of the grid base unit is B, and the length of the side of the second metal grid pattern unit is L ₂ , the grid base and the The two metal grid styles satisfy the following relationships:

In one or more embodiments of the present invention, the first metal mesh pattern and the second metal mesh pattern form a pattern consisting of a plurality of squares and a plurality of diamonds interlaced with the squares.

According to another embodiment of the present invention, a touch panel includes a substrate and a first metal mesh. The first metal grid is disposed on one side of the substrate, wherein the pattern of the first metal grid is formed by the forming method of the first metal grid pattern described above.

In one or more embodiments of the present invention, the first metal mesh includes a plurality of first metal mesh cells, each of the first metal mesh cells having eight sides connected to each other, and the sides are the same length.

In one or more embodiments of the present invention, the touch panel further includes a second metal mesh disposed on the other side of the substrate, wherein the pattern of the second metal mesh is formed by the foregoing second metal mesh pattern. The method is formed.

In one or more embodiments of the present invention, the second metal mesh includes a plurality of second metal mesh cells, each of the second metal mesh cells having eight sides connected to each other, and the sides are the same length.

In one or more embodiments of the present invention, the first metal mesh includes a plurality of first metal mesh cells, and the second metal mesh includes a plurality of second metal mesh cells, the first metal mesh cells and the first The orthographic projection of the two metal grid cells on the substrate is staggered.

In one or more embodiments of the present invention, the orthographic projection of the first metal mesh and the second metal mesh on the substrate forms a plurality of squares and a plurality of diamonds staggered with the square.

In the above embodiment of the present invention, the first metal mesh pattern and the second metal mesh pattern are formed by the method of forming the metal mesh pattern, and formed by the first metal mesh pattern being superposed on the second metal mesh pattern. A pattern of staggered and evenly distributed squares and diamonds. Therefore, if the first metal mesh pattern and the second metal mesh pattern metal mesh are used in combination with the display panel, the metal mesh has the same shading effect for each pixel, thus making each pixel The aperture ratio remains the same, thereby avoiding uneven display brightness.

100‧‧‧ grid base

110‧‧‧Grid base unit

111‧‧‧First grid base unit

112‧‧‧ top side

113‧‧‧left side

114‧‧‧ right side

115‧‧‧Bottom

121‧‧‧Second grid base unit

122‧‧‧ top side

123‧‧‧left side

124‧‧‧ right side

125‧‧‧Bottom

130‧‧‧First generated square

131‧‧‧ first vertex

132‧‧‧second vertex

133‧‧‧ third vertex

134‧‧‧ fourth vertex

140‧‧‧second generation square

141‧‧‧ first vertex

142‧‧‧second vertex

143‧‧‧ third vertex

144‧‧‧ fourth vertex

200‧‧‧First Metal Grid Style

210‧‧‧First metal grid style unit

210E, 310E‧‧‧ side

220‧‧‧ sharp corner structure

300‧‧‧Second metal grid pattern

310‧‧‧Second metal grid style unit

320‧‧‧ sharp corner structure

400‧‧‧ style

410‧‧‧ Square

420‧‧‧Rhombus

500‧‧‧ touch panel

510‧‧‧Substrate

520‧‧‧First Metal Grid

521‧‧‧First Metal Grid Unit

530‧‧‧Second metal grid

531‧‧‧Second metal grid unit

540‧‧‧ Orthographic projection

591‧‧‧square

592‧‧‧Rhombus

θ ₁ ‧‧‧first tilt angle

θ ₂ ‧‧‧second tilt angle

FIG. 1 is a schematic view showing a mesh substrate, a first generated square, and a second generated square according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a first metal grid pattern formed by the first generated square and the second generated square according to FIG. 1 .

FIG. 3 is a schematic view showing a first metal mesh pattern according to an embodiment of the present invention.

FIG. 4 is a schematic diagram showing a second metal mesh pattern formed by the first generated square and the second generated square according to FIG. 1.

FIG. 5 is a schematic view showing a second metal mesh pattern according to an embodiment of the present invention.

FIG. 6 is a schematic view showing a first metal mesh pattern superimposed on a second metal mesh pattern according to an embodiment of the invention.

FIG. 7 is a cross-sectional view of a touch panel in accordance with an embodiment of the present invention.

FIG. 8 is a top view of the touch panel of FIG. 7.

FIG. 9 is a top plan view showing the touch panel of FIG. 8 superimposed on the display panel.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

Different embodiments of the present invention provide a method for forming a metal mesh (Metal Mesh) pattern, and the metal mesh pattern is mainly applied to a metal mesh touch technology.

1 is a schematic diagram of a mesh substrate 100, a first generated square 130, and a second generated square 140, in accordance with an embodiment of the present invention. As shown in FIG. 1 , first, a mesh substrate 100 is formed in which each mesh base unit 110 of the mesh substrate 100 has a square shape, and the mesh base unit 110 is aligned with the adjacent mesh base unit 110. Grid base The side length of the element 110 is the same as the length of the side length of each pixel of the corresponding display panel.

Next, each grid base unit 110 is divided into a plurality of first grid base units 111 and a plurality of second grid base units 121, the first grid base unit 111 and the second grid base unit 121 being similar The layout of the checkerboard is staggered.

Then, a first generated square 130 is formed in each of the first mesh base units 111, wherein each of the first generated squares 130 is identical to the first tilt angle θ ₁ between each of the first mesh base units 111 (Specifically, the first generation square 130 is rotated clockwise by a first inclination angle θ _{1 with respect to} the top edge 112 of the first mesh base unit 111). The first vertex 131, the second vertex 132, the third vertex 133, and the fourth vertex 134 of each first generation square 130 are respectively connected to the top edge 112, the left side 113, and the right side 114 of each first grid base unit 111. And the bottom edge 115.

Next, a second generated square 140 is formed in each of the second mesh base units 121, wherein each of the second generated squares 140 is the same as the second tilt angle θ ₂ between each of the second mesh base units 121 The first inclination angle θ ₁ and the second inclination angle θ ₂ are equal in magnitude and opposite in direction (specifically, the second generation square 140 is rotated counterclockwise with respect to the bottom edge 125 of the second mesh base unit 121; Tilt angle θ ₂ ). The first vertex 141, the second vertex 142, the third vertex 143, and the fourth vertex 144 of each second generation square 140 are respectively connected to the top edge 122, the left side 123, and the right side 124 of each second grid base unit 121. And the bottom edge 125.

FIG. 2 is a schematic diagram showing the first metal grid pattern 200 formed by the first generation square 130 and the second generation square 140 according to FIG. 1 . As shown in FIGS. 1 and 2, by connecting the first vertex 131 and the second vertex 132 of each first generated square 130, the second vertex 132 and the fourth vertex 134 of each first generated square 130 The first vertex 141 and the third vertex 143 of each second generated square 140 and the third vertex 143 and the fourth vertex 144 of each second generated square 140 form a first metal grid pattern 200.

FIG. 3 is a schematic diagram of a first metal grid pattern 200 in accordance with an embodiment of the present invention. As shown in FIG. 3, the first metal mesh pattern 200 includes a plurality of first metal mesh pattern units 210, each of the first metal mesh pattern units 210 having eight sides 210E connected to each other, and the sides 210E The length is the same.

FIG. 4 is a schematic diagram showing a second metal grid pattern 300 formed by the first generation square 130 and the second generation square 140 according to FIG. 1 . As shown in FIGS. 1 and 4, by connecting the first vertex 131 and the third vertex 133 of each first generated square 130, the third vertex 133 and the fourth vertex 134 of each first generated square 130 The first vertex 141 and the second vertex 142 of each second generated square 140 and the second vertex 142 and the fourth vertex 144 of each second generated square 140 form a second metal grid pattern 300.

FIG. 5 is a schematic diagram of a second metal mesh pattern 300 in accordance with an embodiment of the present invention. As shown in FIG. 5, the second metal mesh pattern 300 includes a plurality of second metal mesh pattern units 310, each of which is The two metal mesh pattern unit 310 has eight sides 310E connected to each other, and the lengths of the sides 310E are the same.

As shown in FIGS. 3 and 5, the first metal mesh pattern unit 210 of the first metal mesh pattern 200 has the same shape but the direction of the second metal mesh pattern unit 310 of the second metal mesh pattern 300. different. Specifically, if the first metal mesh pattern unit 210 is rotated by 180 degrees, the shape of the first metal mesh pattern unit 210 is the same as the shape of the second metal mesh pattern unit 310. If depicted at another angle, the first metal grid pattern unit 210 has a pointed corner structure 220, and the second metal grid pattern unit 310 has a pointed corner structure 320 with the pointed corner structure 220 of the first metal grid pattern unit 210 facing Below, the pointed structure 320 of the second metal mesh pattern unit 310 faces upward.

FIG. 6 is a schematic diagram showing the first metal mesh pattern 200 superimposed on the second metal mesh pattern 300 according to an embodiment of the invention. As shown in FIG. 3, FIG. 5, and FIG. 6, if the first metal mesh pattern 200 is superposed on the second metal mesh pattern 300, a pattern 400 as shown in FIG. 6 is generated, that is, by the plural The squares 410 and the plurality of diamonds 420 interlaced with the squares 410 (specifically, the diamonds 420 are divided into two types: an acute angle toward the upper and lower sides and an acute angle toward the left and right sides).

Since the pattern 400 is substantially a staggered and evenly distributed square 410 and diamond 420, if the metal grid of the first metal grid pattern 200 and the second metal grid pattern 300 is used in conjunction with the display panel, the metal grid The masking effect for each pixel is the same, thus making each The aperture ratio of the pixels remains the same, thereby avoiding the display of uneven brightness (Mura).

As shown in FIG. 1, the first inclination angle θ ₁ and the second inclination angle θ ₂ are 30 degrees to 60 degrees or 30 degrees to 40 degrees. It should be understood that the range of angles of the first tilt angle θ ₁ and the second tilt angle θ ₂ are merely examples, and are not intended to limit the present invention. Those having ordinary knowledge in the technical field of the present invention should be considered according to actual needs. The angle range of the first inclination angle θ ₁ and the second inclination angle θ ₂ is elastically selected.

As shown in FIGS. 1 and 3, the side length of the mesh base unit 110 is B, and the length of the side 210E of the first metal mesh pattern unit 210 is L ₁ (this length is equivalent to the first generated square 130). Side length), the mesh substrate 100 and the first metal mesh pattern 200 satisfy the following relationship:

Similarly, as shown in FIGS. 1 and 5, the length 310 of the side of the second metal mesh pattern unit 310 is L ₂ (this length is equivalent to the side length of the second generated square 140), and the grid substrate 100 The following relationship with the second metal grid pattern 300 is satisfied:

FIG. 7 is a cross-sectional view of a touch panel 500 in accordance with an embodiment of the present invention. As shown in FIG. 7, the embodiment further provides a The touch panel 500. The touch panel 500 includes a substrate 510, a first metal mesh 520, and a second metal mesh 530. The first metal mesh 520 is disposed on one side of the substrate 510. The second metal mesh 530 is disposed on the other side of the substrate 510. The pattern of the first metal mesh 520 is formed by the formation method of the first metal mesh pattern 200 described above, and the pattern of the second metal mesh 530 is formed by the formation method of the second metal mesh pattern 300 described above.

FIG. 8 is a top view of the touch panel 500 of FIG. 7. As shown in FIG. 8 , the first metal mesh 520 includes a plurality of first metal mesh units 521 , and the second metal mesh 530 includes a plurality of second metal mesh units 531 , and the first metal mesh unit 521 The orthographic projection of the second metal grid unit 531 on the substrate 510 is staggered.

Specifically, the orthographic projection of the first metal grid 520 and the second metal grid 530 on the substrate 510 forms a plurality of squares 591 and a plurality of diamonds 592 interlaced with the square 591 (the diamond 592 is divided into acute angles upward and downward with The acute angle is toward the left and right sides).

FIG. 9 is a top view showing the touch panel 500 of FIG. 8 superimposed on the display panel 600. As shown in FIG. 9, the display panel 600 is in a light-emitting state (specifically, the display panel 600 is in a full-green screen), and in the light-emitting state, the display panel 600 can be divided into a dark area 610 and a plurality of Open area 620. The first metal grid 520 (see Fig. 8) and the second metal grid 530 (see Fig. 8) form an orthographic projection 540 in the open area 620, since the orthographic projections 540 are the same length in each open area 620. Therefore, the first metal mesh 520 (see FIG. 8) and the second metal mesh 530 (see FIG. 8) have the same shielding effect for each of the open regions 620. Thus, each pixel The aperture ratio will remain the same, thus avoiding display brightness unevenness.

In the above embodiment of the present invention, the first metal mesh pattern 200 and the second metal mesh pattern 300 are formed by the method of forming the metal mesh pattern, and the first metal mesh pattern 200 is superposed on the second metal mesh pattern. A pattern 400 is formed after 300. Since the pattern 400 is substantially a staggered and evenly distributed square 410 and diamond 420, if the metal grid of the first metal grid pattern 200 and the second metal grid pattern 300 is used in conjunction with the display panel, the metal grid The masking effect is the same for each pixel, so that the aperture ratio of each pixel remains the same, thereby avoiding the uneven brightness of the display screen.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧ grid base

110‧‧‧Grid base unit

111‧‧‧First grid base unit

121‧‧‧Second grid base unit

131‧‧‧ first vertex

132‧‧‧second vertex

134‧‧‧ fourth vertex

141‧‧‧ first vertex

143‧‧‧ third vertex

144‧‧‧ fourth vertex

200‧‧‧First Metal Grid Style

Claims (14)

A method for forming a metal mesh pattern, comprising: forming a mesh substrate, wherein each mesh base unit of the mesh substrate has a square shape, and the mesh base cells are aligned with adjacent mesh base cells. The side lengths of the grid base units are the same as the lengths of the sides of each pixel of the corresponding one of the display panels; each of the grid base units is divided into a plurality of first grid base units and a plurality of a second mesh base unit, wherein the first mesh base units are staggered with the second mesh base units; and each of the first mesh base units forms a tilt one of the first generated squares, wherein each The first generated squares are the same as a first tilt angle between each of the first grid base units, and each of the first generated squares has a first vertex, a second vertex, and a third a vertex and a fourth vertex are respectively connected to a top edge, a left side edge, a right side edge, and a bottom edge of each of the first mesh base units; forming a tilt in each of the second mesh base units a second generated square Each of the second generated squares is identical to a second tilt angle between each of the second grid base units, the first tilt angle being equal to the second tilt angle and opposite in direction, each A first vertex, a second vertex, a third vertex, and a fourth vertex of the second generated squares are respectively connected to a top edge, a left side, and a right side of each of the second grid base units And a bottom edge; and the second vertex and the fourth top of each of the first generated squares by connecting each of the first generated squares and the second vertex The first vertices of the second and second vertices of each of the second generated squares and the third vertices and the fourth vertices of each of the second generated squares form a first metal grid pattern. The method of forming of claim 1, wherein the first tilt angle is 30 degrees to 60 degrees. The method of forming of claim 1, wherein the first tilt angle is 30 degrees to 40 degrees. The forming method of claim 1, wherein the first metal mesh pattern comprises a plurality of first metal mesh pattern units, each of the first metal mesh pattern units having eight sides connected to each other, and the These sides are the same length. The method of claim 4, wherein the first tilt angle is θ ₁ , the side lengths of the grid base units are B, and the lengths of the sides of the first metal grid pattern units are L ₁ The mesh substrate and the first metal mesh pattern satisfy the following relationship: The method of forming the method of claim 1, further comprising: connecting the first vertex of each of the first generated squares with the third vertex, the third vertex of each of the first generated squares Fourth top The second tiling pattern is formed by the first vertices and the second vertices of each of the second generated squares and the second vertices and the fourth vertices of each of the second generated squares. The forming method of claim 6, wherein the second metal mesh pattern comprises a plurality of second metal mesh pattern units, each of the second metal mesh pattern units having eight sides connected to each other, and the These sides are the same length. The method of claim 7, wherein the second tilt angle is θ ₂ , the side lengths of the grid base units are B, and the lengths of the sides of the second metal grid pattern units are L ₂ The mesh base and the second metal mesh pattern satisfy the following relationship: The forming method of claim 6, wherein the first metal mesh pattern and the second metal mesh pattern form a pattern consisting of a plurality of squares and a plurality of diamonds interlaced with the squares. A touch panel includes: a substrate: and a first metal grid disposed on one side of the substrate, wherein the pattern of the first metal grid is formed by the forming method as claimed in claim 1, wherein the first A metal mesh includes a plurality of first metal mesh cells, each of the first metal mesh cells having eight sides connected to each other, the edges having the same length L ₁ , each of the first metal meshes The unit has a first point, a second point, a third point, a fourth point and a fifth point, wherein the first point is connected to the second point, the second point and the third point a line connecting the third point and the fourth point, and a line connecting the fourth point and the fifth point respectively being one side of the first metal grid unit, the first point and the fifth point The line connecting the points has a length 2B, the angle between the line connecting the second point and the third point and the line connecting the second point and the fourth point is θ ₁ , and the first metal grid cells satisfy the following relationship : The touch panel of claim 10, further comprising: a second metal grid disposed on the other side of the substrate, wherein the second metal grid has the second pattern as described in claim 5 A method of forming a metal mesh pattern is formed. The touch panel of claim 11, wherein the second metal mesh comprises a plurality of second metal mesh cells, each of the second metal mesh cells having eight sides connected to each other, and the edges The length is the same. The touch panel of claim 10, wherein the first metal mesh comprises a plurality of first metal mesh cells, and the second metal mesh comprises a plurality of second metal mesh cells, the first metal mesh The orthographic projection of the cell and the second metal grid cells on the substrate is staggered. The touch panel of claim 13, wherein the orthographic projection of the first metal grid and the second metal grid on the substrate forms a plurality of squares and a plurality of diamonds staggered with the squares.