CN101719037B - touch display panel - Google Patents

Abstract

The invention relates to a touch-control display panel comprising a first base plate, a second base plate, a shading pattern layer, a touch-control electrode layer and a display medium, wherein the second base plate is arranged opposite to the first base plate; the display medium is positioned between the first base plate and the second base plate; the shading pattern layer is arranged on the first base plate or the second base plate and separated into multiple pixel units, and each pixel unit is provided with pixel sides and is arranged corresponding to the pixel structure of the first base plate; the touch-control electrode layer is positioned on the second base plate and comprises multiple touch-control serials which are respectively provided with multiple series-connected reticular touch-control pads, each reticular touch-control pad is provided with multiple trellis patterns so as to form a reticular structure, and each trellis pattern is provided with trellis sides which are one eighth to three fifth of the pixel sides of the pixel units.

Description

touch display panel

technical field

The present invention relates to a display panel, and in particular to a touch display panel.

Background technique

In today's information society, people's dependence on electronic products is increasing day by day. Electronic products such as mobile phones, handheld PCs, Personal Digital Assistants (PDAs) or smart phones can be seen everywhere in daily life. In order to achieve more convenience, smaller size and more user-friendly, many information products have changed from traditional input devices such as keyboards or mice to use touch panels as input devices, which also have touch The touch display panel with display function has become one of the most popular products nowadays.

Generally speaking, a touch display panel includes a display panel and a touch panel, wherein the touch panel can be built into the display panel or attached to the display panel. The touch panel generally includes a plurality of first touch series extending along the X-axis direction, and a plurality of second touch series extending along the Y-axis direction, wherein each first touch series is connected to each The second touch series respectively has a plurality of touch pads connected in series. When a finger touches the touch panel, the capacitance between the touch pads will be changed, and the change signal will be sent back to the controller to calculate the coordinates of the point where the touch occurs, so that the display panel can be adjusted according to the user's choice. Change the display screen.

In the known touch panel, in order to make the touch panel have high light transmittance, the touch pad is made of transparent conductive material. However, transparent conductive materials have the disadvantages of high resistance and expensive raw materials.

Contents of the invention

The invention provides a touch display panel, which has better visual effect and better sensitivity.

The present invention provides a touch display panel, which includes a first substrate, a second substrate, a light-shielding pattern layer, a touch electrode layer and a display medium. There are multiple pixel structures on the first substrate. The second substrate is located opposite to the first substrate. The light-shielding pattern layer is disposed on the first substrate or the second substrate, wherein the light-shielding pattern layer separates a plurality of pixel units, each pixel unit has a pixel side length, and each pixel unit corresponds to a pixel structure of the first substrate. The touch electrode layer is located on the second substrate, the touch electrode layer includes a plurality of first touch series and a plurality of second touch series, each first touch series and each second touch series Each has a plurality of mesh touch pads connected in series, and each mesh touch pad is provided with a plurality of grid patterns, wherein each grid pattern has a grid side length, and the grid side length is a pixel 1/8 to 3/5 of the pixel side length of the unit. The display medium is located between the first substrate and the second substrate.

In an embodiment of the present invention, the above-mentioned lattice pattern has a line width between 0.1 μm and 10 μm.

In an embodiment of the present invention, the above-mentioned grid pattern is a quadrilateral, and the angle between the base of the quadrilateral grid pattern and the pixel side length of the pixel unit is 0°.

In an embodiment of the present invention, the pixel side length of the aforementioned pixel unit is 200 μm, and the grid side length of the quadrilateral grid pattern is 5 μm˜25 μm.

In an embodiment of the present invention, the above-mentioned grid pattern is rhombus, and the included angle between the base of the rhombus grid pattern and the pixel side length of the pixel unit is 25°-65°.

In an embodiment of the present invention, the pixel side length of the aforementioned pixel unit is 200 μm, and the grid side length of the rhombus grid pattern is 5 μm˜120 μm.

In an embodiment of the present invention, the above-mentioned grid pattern is hexagonal, and the included angle between the base of the hexagonal grid pattern and the pixel side length of the pixel unit is 10°˜45°.

In an embodiment of the present invention, the pixel side length of the above-mentioned pixel unit is 200 μm, and the grid side length of the hexagonal grid pattern is 5 μm˜33 μm.

In an embodiment of the present invention, the above-mentioned grid pattern is a cross shape, and the included angle between the base of the cross-shaped grid pattern and the pixel side length of the pixel unit is 25°˜65°.

In an embodiment of the present invention, the pixel side length of the above-mentioned pixel unit is 200 μm, and the grid side length of the cross-shaped grid pattern is 5 μm˜50 μm.

In an embodiment of the present invention, the above-mentioned lattice pattern is a twisted cross, each twisted cross is composed of four large quadrilaterals and a small quadrilateral arranged in the middle of the four large quadrilaterals, each large quadrilateral The included angle between the base of the small quadrilateral and the side length of the pixel unit is 25°-65°, and the included angle between the base of the small quadrilateral and the pixel side length of the pixel unit is 25°-65°.

In an embodiment of the present invention, the pixel side length of the above-mentioned pixel unit is 200 μm, the grid side length of the large quadrilateral is 5 μm˜50 μm, and the total grid side length of each twisted cross is no more than 135 μm.

In an embodiment of the present invention, the above-mentioned touch electrode layer is located between the second substrate and the light-shielding pattern layer.

In an embodiment of the present invention, the above-mentioned touch electrode layer is located on an outer surface of the second substrate.

In an embodiment of the present invention, an auxiliary substrate is further included, which is located on an outer surface of the second substrate, and the touch electrode layer is located on the auxiliary substrate.

In an embodiment of the present invention, the material of the above-mentioned light-shielding pattern layer includes black resin.

In an embodiment of the present invention, the material of the touch electrode layer includes metal.

In an embodiment of the present invention, the material of the touch electrode layer includes aluminum, copper, molybdenum, titanium, silver, gold, platinum and alloys thereof.

Based on the above, in the touch display panel of the present invention, each mesh touch pad is designed to be composed of a lattice pattern, wherein the lattice pattern has a specific shape and lattice side length, and the bottom of the lattice pattern There is a specific included angle between the side and the pixel side length of the pixel unit. In this way, the interference between the mesh touch pad and the light-shielding pattern layer can be minimized, and the problem that the moiré and lattice patterns are visually visible structures can be solved. Therefore, the touch display panel has better visual effect.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1A is a schematic cross-sectional view of a touch display panel according to a first embodiment of the present invention.

FIG. 1B is a schematic top view of the first substrate in FIG. 1A .

FIG. 1C is a schematic top view of the light-shielding pattern layer in FIG. 1A .

FIG. 1D is a schematic top view of the touch electrode layer in FIG. 1A .

FIG. 1E is a partial schematic diagram of the configuration relationship between the mesh touch pad and the light-shielding pattern layer.

FIG. 1F is a schematic diagram showing the configuration relationship between the lattice pattern and the pixel units in FIG. 1E .

2A is a schematic top view of a mesh touch pad of a touch display panel according to a second embodiment of the present invention.

2B is a partial schematic diagram of the configuration relationship between the mesh touch pad and the light-shielding pattern layer.

FIG. 2C is a schematic diagram of the arrangement relationship between the lattice pattern and the pixel units in FIG. 2B .

3A is a schematic top view of a mesh touch pad of a touch display panel according to a third embodiment of the present invention.

3B is a partial schematic diagram of the configuration relationship between the mesh touch pad and the light-shielding pattern layer.

FIG. 3C is a schematic diagram of the configuration relationship between the lattice pattern and the pixel units in FIG. 3B .

4A is a schematic top view of a mesh touch pad of a touch display panel according to a fourth embodiment of the present invention.

4B is a partial schematic diagram of the configuration relationship between the mesh touch pad and the light-shielding pattern layer.

FIG. 4C is a schematic diagram of the configuration relationship between the lattice pattern and the pixel units in FIG. 4B .

5A is a schematic top view of a mesh touch pad of a touch display panel according to a fifth embodiment of the present invention.

5B is a partial schematic diagram of the configuration relationship between the mesh touch pad and the light-shielding pattern layer.

FIG. 5C is a schematic diagram of the configuration relationship between the lattice pattern and the pixel units in FIG. 5B .

FIG. 6 is a schematic cross-sectional view of a touch display panel according to another embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a touch display panel according to another embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view of a touch display panel according to yet another embodiment of the present invention.

Explanation of reference signs

100, 100a, 100b, 100c: touch display panel

110, 120: Substrate

112: active layer

114: Pixel structure

116: Active components

118: pixel electrode

120a: outer surface

130: shading pattern layer

132: pixel unit

140: touch electrode layer

142, 144: Touch series

146, 146a, 146b, 146c, 146d: mesh touch pad

148, 148a, 148b, 148c, 148d: grid pattern

150, 152a, 154a: bottom edge

152, 154: quadrilateral

160: display media

170: Auxiliary substrate

θ, θ ₁ , θ ₂ : included angle

DL: data line

GL: Lattice side length

PL: pixel side length

SL: scan line

Detailed ways

In order to solve the problem of high resistance value and expensive raw materials of the touch pad made of transparent conductive material, the present invention solves the problem. Therefore, the present invention uses a mesh metal structure to make the touch pad. Among them, since the mesh metal is composed of extremely thin metal wires, the touch pad not only maintains high light transmittance, but also has a smaller resistance value and better sensitivity.

However, since the color filter in the display panel includes a black matrix (Black Matrix, BM) with a periodic structure, the period of the mesh touch pad and the period of the black matrix will interfere with each other in spatial frequency, resulting in The visual effect of Moire. In addition, as a result of mutual interference between the two, the mesh-shaped touch pad structure becomes a visually visible structure, that is, the human eye can see that the touch pad is composed of a mesh. As a result, the touch display panel has blurred images and poor visual effects. Therefore, the present invention designs a touch pad with a specific structure, which can solve the above moiré problem.

【The first embodiment】

1A is a schematic cross-sectional view of a touch display panel according to the first embodiment of the present invention, FIG. 1B is a schematic top view of the first substrate 110 in FIG. 1A , and FIG. 1C is a schematic top view of the light-shielding pattern layer 130 in FIG. 1A 1D is a schematic top view of the touch electrode layer 140 in FIG. 1A, FIG. 1E is a partial schematic diagram of the configuration relationship between the mesh touch pad 146 and the light-shielding pattern layer 130, and FIG. It is a schematic diagram of the configuration relationship between the shape pattern 148 and the pixel unit 132 .

Referring to FIG. 1A , the touch display panel 100 includes a first substrate 110 , a second substrate 120 , a light-shielding pattern layer 130 , a touch electrode layer 140 and a display medium 160 . The second substrate 120 is located opposite to the first substrate 110 . The display medium 160 is located between the first substrate 110 and the second substrate 120 . In this embodiment, the first substrate 110 and the second substrate 120 are, for example, glass substrates, plastic substrates or other suitable substrates. The display medium 160 is, for example, a liquid crystal material. In other words, the touch display panel 100 of this embodiment is, for example, a touch liquid crystal display panel. The display medium 160 can also be other display materials, such as organic light emitting material, electrophoretic display material or plasma display material. Therefore, the touch display panel 100 may also be a touch organic light emitting display panel, a touch electrophoretic display panel or a touch plasma display panel. The detailed display materials and panel structures are well known to those skilled in the art, so they will not be repeated here.

Please refer to FIG. 1A and FIG. 1B at the same time, the active layer 112 is disposed on the first substrate 110 , and the active layer 112 includes a plurality of pixel structures 114 . In general, each pixel structure 114 includes an active element 116 and a pixel electrode 118 electrically connected to the active element 116. The active element 116 is, for example, a thin film transistor, and each pixel structure 114 is connected to a corresponding data line through the active element 116. DL and the scan line SL are electrically connected. Wherein, since the pixel structure 114 is well known to those skilled in the art, its related description is omitted. In addition, the pixel structure 114 shown in FIG. 114 structure or configuration.

Please refer to FIG. 1A and FIG. 1C at the same time. In this embodiment, the light-shielding pattern layer 130 is, for example, disposed on the second substrate 120 . The light-shielding pattern layer 130 separates a plurality of pixel units 132 , each pixel unit 132 has a pixel side length PL, and each pixel unit 132 is disposed corresponding to a pixel structure 114 of the first substrate 110 . In other words, the light-shielding pattern layer 130 is, for example, a periodic structure whose period is the pixel side length PL. In this embodiment, the material of the light-shielding pattern layer 130 is, for example, black resin, so the light-shielding pattern layer 130 can also be called a black matrix. Wherein, the pixel side length PL of the pixel unit 132 is, for example, 200 μm. In particular, in this embodiment, for example, a red filter pattern layer, a blue filter pattern layer or a green filter pattern layer is disposed in the pixel unit 132, but in another embodiment, the filter pattern The layers can also be configured in other film layers. In other words, the pixel units 132 separated by the light-shielding pattern layer 130 can actually be openings.

Please refer to FIG. 1A and FIG. 1D at the same time, the touch electrode layer 140 is located on an outer surface 120 a of the second substrate 120 , and the second substrate 120 is, for example, located between the touch electrode layer 140 and the light-shielding pattern layer 130 . The touch electrode layer 140 includes a plurality of first touch series 142 and a plurality of second touch series 144, and each first touch series 142 and each second touch series 144 respectively have A plurality of mesh touchpads 146 . In this embodiment, the first touch series 142 is, for example, extending along the Y-axis direction, and is composed of a plurality of Y mesh touch pads connected in series with a plurality of Y bridge lines, and the second touch series 144 is, for example, It extends along the X-axis direction and is composed of multiple X mesh touch pads and multiple X bridge wires connected in series. The X mesh touch pad and the Y mesh touch pad can be located in the same film layer, and the X bridge wires and the Y bridge wires are electrically isolated by insulating layer blocks. The X mesh touch pad and the Y mesh touch pad can also be located in different film layers, and are electrically isolated by an insulating layer in the middle. Moreover, a plurality of lattice patterns 148 are disposed in each mesh touch pad 146 to form a mesh structure in each mesh touch pad 146 . Wherein, each grid pattern 148 has a grid side length GL, and the grid side length GL is 1/8˜3/5 of the pixel side length PL of the pixel unit 132 . Taking the pixel side length PL as 200 μm as an example, the lattice side length GL is, for example, 25 μm˜120 μm. In this embodiment, the material of the touch electrode layer 140 includes metal, such as aluminum, copper, molybdenum, titanium, silver, gold, platinum and alloys thereof. And, in this embodiment, the line width W of the grid pattern 148 is, for example, between 0.1 μm and 10 μm, so the mesh touch pad 146 is actually composed of extremely thin metal wires, so the mesh touch pad 146 The control pad 146 has relatively high light transmittance. In particular, in this embodiment, the shape of the mesh touch pad 146 is rhombus as an example, but in other embodiments, the mesh touch pad 146 may also be rectangular, circular or other shapes. In addition, the number of grid patterns 148 constituting the mesh touch pad 146 can be adjusted according to the purpose of use, and the number of grid patterns 148 shown in the drawings is only for the clarity of the drawings, rather than representing the composition of the mesh. The actual number of lattice patterns 148 of the touch pad 146 is.

FIG. 1E is a partial schematic diagram of the configuration relationship between the mesh touch pad 146 and the light-shielding pattern layer 130 , and FIG. 1F is a schematic diagram of the configuration relationship between the lattice pattern 148 and the pixel unit 132 in FIG. 1E . It should be noted that in FIG. 1E , in order to clearly show the configuration relationship between the mesh touch pad 146 and the light-shielding pattern layer 130 , the light-shielding pattern layer 130 shown in FIG. 1C is represented by a thick black line, and only the The partial mesh touch pad 146 and the light-shielding pattern layer 130, and in FIG. 1F, in order to facilitate the description of the configuration relationship between the grid pattern 148 and the pixel unit 132, the grid pattern 148 in FIG. 1E may be arranged in the X-axis direction Up or in the direction of the Y axis, there is an angle θ between the bottom edge 150 and the pixel side length PL of the pixel unit 132, but it can be understood that the angle θ is actually the bottom edge of the lattice pattern 148 150 and the pixel side length PL of the pixel unit 132 .

Please refer to FIG. 1E and FIG. 1F at the same time. Generally speaking, when the light-shielding pattern layer 130 and the mesh touch pad 146 are both periodic structures, the periods of the two will interfere with each other in terms of spatial frequency, and the purpose of moire will be generated. Visual effect, and cause the lattice pattern 148 of the mesh touch pad 146 to become a visually visible structure. However, in the present invention, the lattice pattern 148 constituting the mesh touch pad 146 is designed into a specific shape, and the base 150 of the lattice pattern 148 and the pixel side length of the pixel unit 132 are obtained using the formula described later The angle θ between the PLs and the lattice side length GL of the lattice pattern 148 can minimize the interference between the period of the light-shielding pattern layer 130 and the period of the mesh touch pad 146 to solve the moiré problem . Next, the formula for designing the grid pattern 148 will be introduced by taking the rhombus grid pattern 148 of this embodiment as an example.

$\sqrt{{<span\; class="notranslate">\; [</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; \&theta;</span>}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; [</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; sin</span>}\mathrm{<span\; class="notranslate">\; \&theta;</span>}<span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; \&Greater\; Equal;</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; eye</span>}}$

In the above formula, f ₁ is the spatial frequency of the light-shielding pattern layer 130 , that is, the pixel side length PL, for example, 200 μm. f ₂ is the spatial frequency of any group of parallel side lengths in the grid pattern 148 , that is, the grid side length GL. The included angle θ is the included angle between the base 150 of the grid pattern 148 and the pixel side length PL of the pixel unit 132 . f _eye is the resolution of the human eye, about 50cm/μm. Taking the rhombus grid pattern 148 as an example, the included angle θ is preferably 25° to 65°, the most optimal is 45°; f ₂ is preferably less than 3/5 of f ₁ , that is, the grid side length GL is preferably less than 3/5 of the pixel side length PL of the pixel unit 132 . Taking the pixel side length PL as 200 μm as an example, the lattice side length GL is preferably 5 μm˜120 μm, most preferably 60 μm. By obtaining the angle θ between the base 150 of the lattice pattern 148 and the pixel side length PL of the pixel unit 132 and the lattice side length GL of the lattice pattern 148 through the above formula, the design shown in FIG. 1E can be obtained. The mesh touch pad 146 is used to minimize the interference between the period of the light-shielding pattern layer 130 and the period of the mesh touch pad 146 . It should be noted that although the rhombus-shaped lattice pattern 148 is used as an example in this embodiment, the formula is applicable to designing lattice patterns 148 of various shapes.

In this embodiment, the mesh touch pad is a mesh structure composed of lattice patterns, so the mesh touch pad has better light transmittance, lower resistance and better sensitivity. In addition, because the grid pattern constituting the mesh touch pad has a specific shape and grid side length, and there is a specific angle between the bottom edge of the grid pattern and the pixel side length of the pixel unit, so the mesh touch pad The interference between the control pad and the light-shielding pattern layer can be minimized, and the problem that moiré and lattice pattern are visually visible structures can be solved. Therefore, the touch display panel of this embodiment has better visual effect, and has good sensing sensitivity in operation.

Next, in the second embodiment to the fifth embodiment, mesh touch pads composed of grid patterns of other shapes will be introduced, because in these embodiments, other components of the touch display panel are the same as those of the first embodiment The above examples are similar, so in the second embodiment to the fifth embodiment, only the arrangement relationship between the lattice pattern, the mesh touch pad and the light-shielding pattern layer, and the arrangement relationship between the lattice pattern and the pixel unit will be described .

【Second Embodiment】

2A is a schematic top view of a mesh touch pad 146a of a touch display panel according to the second embodiment of the present invention, and FIG. 2B is a partial schematic diagram of the configuration relationship between the mesh touch pad 146a and the light-shielding pattern layer 130, And FIG. 2C is a schematic diagram showing the configuration relationship between the lattice pattern 148 a and the pixel unit 132 in FIG. 2B .

Please refer to FIG. 2A, FIG. 2B and FIG. 2C at the same time. In this embodiment, the grid pattern 148a constituting the mesh touch pad 146a is, for example, a quadrilateral, and the bottom edge 150 of the quadrilateral grid pattern 148a is aligned with the pixels of the pixel unit 132. The included angle of the side length PL is, for example, 0°. Wherein, the grid pattern 148a is, for example, a square, and the grid side length GL is, for example, less than 1/8 of the pixel side length PL of the pixel unit 132. Taking the pixel side length PL as 200 μm as an example, the grid side of the quadrilateral grid pattern 148a The length GL is, for example, 5 μm to 25 μm, and preferably 25 μm.

In this embodiment, the grid pattern 148a of the mesh touch pad 146a is designed as shown in FIG. 2A and FIG. 2B through the formula described in the first embodiment, so that the mesh touch pad 146a can The interference with the light-shielding pattern layer 130 is minimized, and the problem that the moiré and lattice patterns are visually visible structures is solved. Therefore, the touch display panel of this embodiment has better visual effect, and has good sensing sensitivity in operation.

In particular, in another embodiment (not shown), the grid side length GL of the quadrangular grid pattern 148a of the mesh touch pad 146a can also be designed to be the same as the pixel side length PL of the pixel unit 132. The same, that is to make the quadrilateral grid pattern 148a overlap the pixel unit 132 substantially completely. In this way, since the period of the mesh touch pad 146a is exactly the same as the period of the light-shielding pattern layer 130, there is almost no interference phenomenon, so Can minimize or avoid the occurrence of moiré.

[Third embodiment]

3A is a schematic top view of a mesh touch pad 146b of a touch display panel according to the third embodiment of the present invention, and FIG. 3B is a partial schematic diagram of the configuration relationship between the mesh touch pad 146b and the light-shielding pattern layer 130 , And FIG. 3C is a schematic diagram showing the arrangement relationship between the lattice pattern 148 b and the pixel unit 132 in FIG. 3B .

Please refer to FIG. 3A, FIG. 3B and FIG. 3C at the same time. In this embodiment, the grid pattern 148b constituting the mesh touch pad 146b is, for example, hexagonal, and the bottom edge 150 of the hexagonal grid pattern 148b is aligned with the pixel unit 132. The included angle θ between the pixel side length PL is, for example, 10°˜45°, and preferably 15°. Wherein, the grid pattern 148b is, for example, a regular hexagon, and the grid side length GL is, for example, less than 1/6 of the pixel side length PL of the pixel unit 132. Taking the pixel side length PL as 200 μm as an example, the hexagonal grid pattern 148b The grid side length GL is, for example, 5 μm˜33 μm, and preferably 30 μm.

In this embodiment, the grid pattern 148b of the mesh touch pad 146b is designed as shown in FIG. 3A and FIG. 3B through the formula described in the first embodiment, so that the mesh touch pad 146b can The interference with the light-shielding pattern layer 130 is minimized, and the problem that the moiré and lattice patterns are visually visible structures is solved. Therefore, the touch display panel of this embodiment has better visual effect, and has good sensing sensitivity in operation.

[Fourth Embodiment]

FIG. 4A is a schematic top view of a mesh touch pad 146c of a touch display panel according to the fourth embodiment of the present invention, and FIG. 4B is a partial schematic diagram of the configuration relationship between the mesh touch pad 146c and the light-shielding pattern layer 130, And FIG. 4C is a schematic diagram showing the configuration relationship between the lattice pattern 148c and the pixel unit 132 in FIG. 4B.

Please refer to FIG. 4A, FIG. 4B and FIG. 4C at the same time. In this embodiment, the grid pattern 148c constituting the mesh touch pad 146c is, for example, cross-shaped, and the bottom edge 150 of the cross-shaped grid pattern 148c is aligned with the pixel unit 132. The included angle θ of the pixel side length PL is, for example, 25°˜65°, and is preferably 45°. Wherein, the lattice side length GL of the cross-shaped lattice pattern 148c is, for example, less than 1/4 of the pixel side length PL of the pixel unit 132. Taking the pixel side length PL as 200 μm as an example, the lattice side length of the cross-shaped lattice pattern 148c The length GL is, for example, 5 μm to 50 μm, and preferably 45 μm.

In this embodiment, the grid pattern 148c of the mesh touch pad 146c is designed as shown in FIG. 4A and FIG. 4B through the formula described in the first embodiment, so that the mesh touch pad 146c can The interference with the light-shielding pattern layer 130 is minimized, and the problem that the moiré and lattice patterns are visually visible structures is solved. Therefore, the touch display panel of this embodiment has better visual effect, and has good sensing sensitivity in operation.

[fifth embodiment]

FIG. 5A is a schematic top view of a mesh touch pad 146d of a touch display panel according to a fifth embodiment of the present invention, and FIG. 5B is a partial schematic diagram of the configuration relationship between the mesh touch pad 146d and the light-shielding pattern layer 130 . And FIG. 5C is a schematic diagram showing the configuration relationship between the grid pattern 148d and the pixel unit 132 in FIG. 5B.

Please refer to FIG. 5A, FIG. 5B and FIG. 5C at the same time. In this embodiment, the lattice pattern 148d constituting the mesh touch pad 146d is, for example, a twisted cross, and each twisted cross is composed of four large quadrilaterals 152 and set A small quadrilateral 154 is formed in the middle of the four large quadrilaterals 152, and the included angle θ ₁ between the base 152a of each large quadrilateral 152 and the pixel side length PL of the pixel unit 132 is 25° to 65°, and is preferably 45°, the angle θ ₂ between the base 154 a of the small quadrilateral 154 and the pixel side length PL of the pixel unit 132 is 25°˜65°, and is preferably 45°. Wherein, the side length of the large quadrilateral 152 is preferably less than 1/4 of the side length PL of the pixel, and the sum of twice the side length of the large quadrilateral 152 and the side length of the small quadrilateral 154 is, for example, no more than 135 μm, that is, every The total lattice side length GL of a twisted cross is, for example, not more than 135 μm. Therefore, taking the pixel side length PL as 200 μm as an example, the side length of the large quadrilateral 152 is, for example, 5 μm˜50 μm, and preferably 45 μm.

In this embodiment, the twisted cross-shaped grid pattern 148d can minimize the interference between the mesh touch pad 146d and the light-shielding pattern layer 130 , and solve the problem that the moire and the grid pattern are visually visible structures. In addition, the twisted cross-shaped lattice pattern 148d can provide better light transmittance than the cross-shaped lattice pattern 148c shown in FIG. 4A . Therefore, the touch display panel of this embodiment has better visual effect, good light transmittance and good sensing sensitivity in operation.

In particular, besides the patterns shown in the above-mentioned embodiments, the grid pattern may also be other polygons or arbitrary shapes. In addition, although in the above-mentioned embodiments, the lattice pattern arranged periodically is used as an example to form the mesh touch pad, in other embodiments, the lattice pattern can also be arranged in a non-periodic pattern.

Moreover, in the above-mentioned embodiment, as shown in FIG. 1A , the touch electrode layer 140 is located between the second substrate 120 and the light-shielding pattern layer 130 as an example, but in another embodiment, as shown in FIG. 6 As shown, in the touch display panel 100a, the touch electrode layer 140 may also be located between the second substrate 120 and the light-shielding pattern layer 130 . Alternatively, in another embodiment, as shown in FIG. 7 , the touch display panel 100b further includes an auxiliary substrate 170, the auxiliary substrate 170 is located on an outer surface 120a of the second substrate 120, and the touch electrode layer 140 is located on the auxiliary substrate 120. on the substrate 170. In other words, the touch electrode layer 140 can be built into the display panel as shown in FIG. 1A (the display panel here refers to the structure composed of the first substrate 110 and the second substrate 120 and the display medium 160 between them) , or externally pasted on the display panel as shown in FIG. 6 and FIG. 7 . In addition, in the above-mentioned embodiments, it is taken as an example that the light-shielding pattern layer 130 is disposed on the second substrate 120 , but the light-shielding pattern layer 130 may also be disposed on the first substrate 110 . For example, as shown in FIG. 8 , in yet another embodiment of the touch display panel 100c, the light-shielding pattern layer 130 may also be disposed on the first substrate 110 and located between the active layer 112 and the display medium 160 . In addition, in an embodiment (not shown), the light-shielding pattern layer 130 may also be composed of data lines DL and scan lines SL as shown in FIG. 1B or have other structures or be arranged on the first substrate 110 in other ways. or on the second substrate 120 .

In the above-mentioned embodiment, since the remaining components and configurations of the touch display panels 100 a , 100 b , and 100 c are similar to those of the touch display panel 100 described in the first embodiment, they are not described here. However, it is particularly worth mentioning that in the touch display panels 100a, 100b, and 100c, the mesh touch pads in the touch electrode layer 140 can be the above mesh touch pads 146-146d or other designs according to the present invention. mesh touch pad. Furthermore, since the mesh touch pads of the touch display panels 100a, 100b, and 100c are composed of the above-mentioned grid patterns, the touch display panels 100a, 100b, and 100c also have better visual effects and good transparency. Light efficiency and good sensing sensitivity in operation.

To sum up, in the present invention, the lattice pattern constituting the mesh touch pad is designed to have a specific shape and lattice side length, and the distance between the bottom edge of the lattice pattern and the pixel side length of the pixel unit With a specific included angle, the interference between the mesh touch pad and the light-shielding pattern layer can be minimized, and the problem that the moiré and lattice patterns are visually visible structures can be solved. In addition, since the mesh touch pad is a mesh structure composed of lattice patterns, the mesh touch pad has better light transmittance, lower resistance value and better sensitivity. Therefore, the touch display panel of the present invention has better visual effect, and has good sensing sensitivity in operation.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the protection scope of the claims.

Claims (18)

1. A touch display panel, comprising: A first substrate with a plurality of pixel structures on the first substrate; a second substrate, located opposite to the first substrate; A light-shielding pattern layer, disposed on the first substrate or the second substrate, wherein the light-shielding pattern layer separates a plurality of pixel units, each pixel unit has a pixel side length, and each pixel unit corresponds to the first substrate A pixel structure setting; A touch electrode layer, located on the second substrate, the touch electrode layer includes a plurality of first touch series and a plurality of second touch series, each first touch series and each second The touch series respectively has a plurality of mesh touch pads connected in series, and each mesh touch pad has a plurality of lattice patterns, wherein each lattice pattern has a lattice side length, and the lattice pattern The side length is 1/8 to 3/5 of the pixel side length of the pixel unit: and a display medium located between the first substrate and the second substrate; When the light-shielding pattern layer is disposed on the second substrate, the second substrate is located between the touch electrode layer and the light-shielding pattern layer. 2. The touch display panel according to claim 1, wherein the lattice patterns have a line width ranging from 0.1 μm to 10 μm. 3 . The touch display panel according to claim 1 , wherein the grid patterns are quadrilaterals, and the angle between the bottom of the quadrilateral grid patterns and the pixel side length of the pixel unit is 0°. 4 . The touch display panel according to claim 3 , wherein the pixel side length of the pixel unit is 200 μm, and the grid side length of the quadrilateral lattice pattern is 25 μm˜120 μm. 5. The touch display panel according to claim 1, wherein the lattice patterns are diamond-shaped, and the angle between the bottom of the diamond-shaped lattice pattern and the pixel side length of the pixel unit is 25°-65° °. 6 . The touch display panel according to claim 5 , wherein the pixel side length of the pixel unit is 200 μm, and the grid side length of the diamond grid pattern is 25 μm˜120 μm. 7. The touch display panel according to claim 1, wherein the lattice patterns are hexagonal, and the included angle between the base of the hexagonal lattice pattern and the pixel side length of the pixel unit is 10° ~45°. 8 . The touch display panel according to claim 7 , wherein the pixel side length of the pixel unit is 200 μm, and the grid side length of the hexagonal lattice pattern is 25 μm˜120 μm. 9. The touch display panel according to claim 1, wherein the lattice patterns are cross-shaped, and the angle between the base of the cross-shaped lattice pattern and the pixel side length of the pixel unit is 25° ~65°. 10 . The touch display panel according to claim 9 , wherein the pixel side length of the pixel unit is 200 μm, and the grid side length of the cross-shaped lattice pattern is 25 μm˜120 μm. 11 . 11. The touch display panel according to claim 1, wherein the lattice patterns are twisted crosses, each twisted cross is composed of four large quadrilaterals and a small quadrilateral arranged in the middle of the four large quadrilaterals Composition, the included angle between the base of each large quadrilateral and the side length of the pixel unit is 25°～65°, and the included angle between the base of the small quadrilateral and the pixel side length of the pixel unit is 25°～65° 65°. 12. The touch display panel according to claim 11, wherein the pixel side length of the pixel unit is 200 μm, the grid side length of the large quadrilateral is 25 μm˜120 μm, and the total grid side length of each twisted cross is No more than 135 μm. 13. The touch display panel according to claim 1, wherein the touch electrode layer is located between the second substrate and the light-shielding pattern layer. 14. The touch display panel according to claim 1, wherein the touch electrode layer is located on an outer surface of the second substrate. 15. The touch display panel according to claim 1, further comprising an auxiliary substrate located on an outer surface of the second substrate, and the touch electrode layer is located on the auxiliary substrate. 16. The touch display panel according to claim 1, wherein a material of the light-shielding pattern layer comprises black resin. 17. The touch display panel according to claim 1, wherein a material of the touch electrode layer comprises metal. 18. The touch display panel according to claim 17, wherein the material of the touch electrode layer comprises aluminum, copper, molybdenum, titanium, silver, gold, platinum and alloys thereof. the

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