CN111506226A - touch substrate - Google Patents

Abstract

A touch substrate including a substrate and a plurality of touch sensing units is proposed. These touch sensing units are disposed on the substrate. Each touch sensing unit includes a first touch electrode, a second touch electrode and a dummy electrode. The first touch electrode intersects the second touch electrode. The dummy electrode is disposed between the first touch electrode and the second touch electrode. The vertical projection of the dummy electrode on the substrate does not overlap with the vertical projection of the first touch electrode and the second touch electrode on the substrate. The difference between the total reflectance of the first touch electrode and the second touch electrode of each touch sensing unit and the reflectance of the dummy electrode is less than 3%.

Description

touch substrate

technical field

The present invention relates to a touch control technology, and in particular, to a touch control substrate.

Background technique

In recent years, people's dependence on electronic products has increased day by day. In order to achieve the purpose of being more convenient, more compact and more user-friendly, the input devices of many information products have been changed from traditional keyboards or mice to touch panels, among which display panels with touch function have become the standard of today's mobile devices Equipped. Due to its advantages of fast response, good reliability and high durability, capacitive touch technology has become the mainstream of touch technology, and is widely used in related electronic products (such as mobile phones, tablet computers or smart watches). According to the integration method of touch technology and display panel, capacitive touch display panel can be roughly divided into three types: out-cell, on-cell and in-cell. .

Generally speaking, in an externally mounted or integrated touch display panel, the touch electrode layer is disposed on the side of the display panel close to the user, so that the touch electrodes can better sense the user's touch. In order to increase the transmission speed (or the sensing frequency) of the sensing signal, the touch electrode layers are mostly made of metal materials. Therefore, when the external ambient light is irradiated on the touch electrode layer, reflection is likely to occur, which causes the patterned touch electrodes to be seen by the human eye, and further causes the display quality of the touch display panel to deteriorate.

SUMMARY OF THE INVENTION

The present invention provides a touch substrate with better concealment of the touch electrodes.

The touch substrate of the present invention includes a substrate and a plurality of touch sensing units. The touch sensing units are disposed on the substrate. Each touch sensing unit includes a first touch electrode, a second touch electrode and a dummy electrode. The first touch electrodes intersect with the second touch electrodes. The dummy electrodes are disposed between the first touch electrodes and the second touch electrodes. The vertical projections of the dummy electrodes on the substrate do not overlap the vertical projections of the first touch electrodes and the second touch electrodes on the substrate. The difference between the total reflectivity of the first touch electrodes and the second touch electrodes of each touch sensing unit and the reflectivity of the dummy electrodes is less than 3%.

In an embodiment of the present invention, the first touch electrodes of the above-mentioned touch substrate have a plurality of first wires and a plurality of second wires arranged in a mesh. The extending direction of the first wires is parallel to the extending direction of the first touch electrodes. The extending directions of the second wires intersect with the extending directions of the first touch electrodes, and have a plurality of first disconnections.

In an embodiment of the present invention, the connection lines of the plurality of first disconnections of the plurality of second wires of the above-mentioned touch substrate are staggered from the plurality of first wires.

In an embodiment of the present invention, the dummy electrodes of the touch substrate have a plurality of dummy wires arranged in a mesh. The dummy wires respectively have a plurality of second disconnections. Each first disconnection has a first width in the extending direction of the corresponding second wire. Each second disconnection has a second width in the extending direction of the corresponding dummy wire, and the first width is greater than or equal to the second width.

In an embodiment of the present invention, the second touch electrodes of the above-mentioned touch substrate have a plurality of third wires and a plurality of fourth wires arranged in a mesh. The extending direction of the third wires is parallel to the extending direction of the second touch electrodes. The extending directions of the fourth wires intersect with the extending directions of the second touch electrodes, and have a plurality of second disconnections.

In an embodiment of the present invention, the connection lines of the plurality of second disconnections of the plurality of fourth conductive lines of the above-mentioned touch substrate are staggered from the plurality of third conductive lines.

In an embodiment of the present invention, the first touch electrodes of the above-mentioned touch substrate include a first extension portion and a second extension portion. The extension direction of the plurality of second wires of the first extension part intersects with the extension direction of the first extension part. The second wires of the first extension have a plurality of first disconnections. The extension directions of the plurality of first wires of the second extension part intersect with the extension direction of the second extension part. The first wires of the second extension have a plurality of second breaks.

In an embodiment of the present invention, the connection lines of the plurality of first disconnections of the plurality of second wires of the first extension portion of the above-mentioned touch substrate are staggered from the plurality of first wires of the first extension portion. The connecting lines of the plurality of second disconnections of the plurality of first wires of the second extension part are staggered from the plurality of second wires of the second extension part.

In an embodiment of the present invention, each first disconnection of the first extending portion of the touch substrate has a first width in the extending direction of the corresponding second wire. Each second disconnection of the second extension portion has a second width in the extending direction of the corresponding first wire, and the first width is not equal to the second width.

In an embodiment of the present invention, the dummy electrodes of the touch substrate have a plurality of dummy wires arranged in a mesh. The dummy wires respectively have a plurality of third disconnections. Each third disconnection has a third width in the extending direction of the corresponding dummy wire, and the first width and the second width are greater than or equal to the third width.

In an embodiment of the present invention, the first touch electrodes, the second touch electrodes and the dummy electrodes of the above-mentioned touch substrate belong to the same film layer and are separated from each other.

Based on the above, in the touch substrate of an embodiment of the present invention, the first touch electrodes and the second touch electrodes are disposed to intersect, and dummy electrodes are disposed between the two touch electrodes. The vertical projection of the dummy electrode on the substrate does not overlap the vertical projection of the first touch electrode and the second touch electrode on the substrate. Because the difference between the total reflectivity of the first touch electrode and the second touch electrode of each touch sensing unit and the reflectivity of the dummy electrode is less than 3%, the patterned touch electrodes can be effectively reduced when exposed to ambient light. lower visibility, thereby improving the display quality of the touch display panel.

Description of drawings

FIG. 1 is a schematic top view of a touch substrate according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic view of a partial area of the touch substrate of FIG. 1 .

FIG. 3 is an enlarged schematic view of a partial area of the touch substrate of FIG. 1 .

FIG. 4 is an enlarged schematic view of a partial area of the touch substrate of FIG. 2 .

FIG. 5 is a schematic top view of a touch substrate according to another embodiment of the present invention.

Description of reference numbers:

10, 11: Touch substrate

100: Substrate

110: First wire

120: Second wire

210: Third wire

220: Fourth wire

250: Bridge Pattern

251: Contact window

310, 320: Dummy wires

CL1, CL2, CL3: Wiring

CT1, CT2, CT3, CT4, CT1a, CT1b, CT1b': disconnection

DE: dummy electrode

I ₁ , I ₂ : Current

OP: open mouth

TE1, TE1': the first touch electrodes

TE1a, TE2a: first extension

TE1b, TE2b, TE1b': the second extension

TE2: Second touch electrode

TL1: The first touch signal line

TL2: The second touch signal line

TSU: Touch Sensing Unit

W1, W2, W3, W1a, W1b, W1b': Width

X, Y: direction

I, II: Regions

Detailed ways

As used herein, "about," "approximately," "substantially," or "substantially" includes the stated value and the average within acceptable deviations from the particular value as determined by one of ordinary skill in the art, taking into account all The measurement in question and the specific amount of error associated with the measurement (ie, the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±15%, ±10%, ±5%, for example. Furthermore, as used herein, "about", "approximately", "substantially", or "substantially" may be used to select a more acceptable range of deviation or standard deviation depending on measurement properties, cutting properties or other properties, and may not be used. One standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, the "electrical connection" may refer to the existence of other elements between the two elements.

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used in the drawings and description to refer to the same or like parts.

FIG. 1 is a schematic top view of a touch substrate according to an embodiment of the present invention. FIG. 2 is an enlarged schematic view of a partial area of the touch substrate of FIG. 1 . FIG. 3 is an enlarged schematic view of a partial area of the touch substrate of FIG. 1 . FIG. 4 is an enlarged schematic view of a partial area of the touch substrate of FIG. 2 . In particular, FIG. 2 and FIG. 3 correspond to area I and area II of FIG. 1 , respectively. For the sake of clarity, FIG. 1 omits the illustration of the detailed structure of the touch electrodes in FIG. 2 , and FIGS. 2 and 3 omit the illustration of the bridge pattern 250 and the contact window 251 in FIG. 4 .

Referring to FIG. 1 , the touch substrate 10 includes a substrate 100 and a plurality of touch sensing units TSU disposed on the substrate 100 . The touch sensing units TSU can be arranged on the substrate 100 in an array. For example, a plurality of touch sensing units TSU can be arranged in a plurality of columns and rows along the direction X and the direction Y respectively, and are electrically connected to each other. In this embodiment, the direction X may be perpendicular to the direction Y, but not limited thereto. The material of the substrate 100 may include glass, quartz, organic polymer, or other suitable materials. In particular, the substrate 100 of this embodiment may be a substrate on the display side of the display panel. That is to say, the above-mentioned touch sensing unit TSU can be directly fabricated on the substrate surface on one side of the display panel to form an on-cell touch display panel. However, the present invention is not limited thereto, and according to other embodiments, the touch substrate can also be directly attached to the display side of the display panel to form an out-cell touch display panel.

The touch sensing unit TSU includes a first touch electrode TE1 and a second touch electrode TE2 intersecting with each other. For example, the plurality of first touch electrodes TE1 of the plurality of touch sensing units TSU arranged in a row along the direction X are electrically connected to each other to form the first touch signal line TL1, and the first touch signal Line TL1 extends substantially along the direction X. The plurality of second touch electrodes TE2 of the plurality of touch sensing units TSU arranged in a row along the direction Y are electrically connected to each other to form a second touch signal line TL2, and the second touch signal line TL2 is substantially Extends along direction Y. For example, in this embodiment, the first touch signal line TL1 and the second touch signal line TL2 are respectively extended in the direction X and the direction Y by bending back and forth, but the invention is not limited to this. .

In this embodiment, the first touch signal line TL1 and the second touch signal line TL2 can be used to transmit a touch driving signal and a touch sensing side signal, respectively. That is to say, the first touch electrode TE1 of the touch sensing unit TSU may be a driving electrode (or a transmitting electrode), and the second touch electrode TE2 may be a receiving electrode (or a sensing side electrode), but the present invention does not This is the limit. In other embodiments, the first touch electrodes TE1 and the second touch electrodes TE2 may also be receiving electrodes and driving electrodes, respectively.

The touch sensing unit TSU further includes a dummy electrode DE disposed between the first touch electrode TE1 and the second touch electrode TE2. In this embodiment, two adjacent first touch signal lines TL1 intersect with two adjacent second touch signal lines TL2 to define an opening OP, and the dummy electrodes DE are disposed in the opening OP. The vertical projection of the dummy electrodes DE on the substrate 100 does not overlap the first touch electrodes TE1 (or the first touch signal lines TL1 ) and the second touch electrodes TE2 (or the second touch signal lines TL2 ) on the substrate 100 vertical projection. It is particularly mentioned that the dummy electrode DE is electrically independent from the first touch electrode TE1 and the second touch electrode TE2. More specifically, the dummy electrode DE has a floating potential. That is, the dummy electrode DE is not electrically connected to any signal source.

It is worth mentioning that the difference between the total reflectance of the first touch electrode TE1 and the second touch electrode TE2 of each touch sensing unit TSU and the reflectance of the dummy electrode DE is less than 3%. Accordingly, the visibility of the patterned touch electrodes (eg, the first touch electrodes TE1 and the second touch electrodes TE2 ) under ambient light illumination can be effectively reduced, thereby improving the display quality of the touch display panel.

In this embodiment, the first touch electrode TE1 , the second touch electrode TE2 and the dummy electrode DE, which are separated from each other in structure, may selectively belong to the same film layer. That is, the materials of the first touch electrodes TE1 , the second touch electrodes TE2 and the dummy electrodes DE may be the same. However, the present invention is not limited thereto, and according to other embodiments, at least one of the first touch electrode TE1 , the second touch electrode TE2 and the dummy electrode DE may also belong to different layers. In this embodiment, the materials of the first touch electrodes TE1 , the second touch electrodes TE2 and the dummy electrodes DE are metals (eg, aluminum, titanium, molybdenum, or a combination thereof), but not limited thereto. In other embodiments, the materials of the first touch electrodes TE1 , the second touch electrodes TE2 and the dummy electrodes DE may also include metal-based conductors and non-metal-based conductors (eg, indium tin oxide).

Please also refer to FIG. 2 , the first touch electrode TE1 has a plurality of first wires 110 and a plurality of second wires 120 arranged in a mesh. That is, the first wires 110 and the second wires 120 are intersected to form a first metal mesh. Similarly, the second touch electrode TE2 has a plurality of third wires 210 and a plurality of fourth wires 220, and the third wires 210 and the fourth wires 220 are intersected to form a second metal grid. The dummy electrode DE has a plurality of first dummy wires 310 and a plurality of second dummy wires 320 , and the first dummy wires 310 and the second dummy wires 320 are intersected to form a dummy metal mesh. In this embodiment, since the first touch electrode TE1 , the second touch electrode TE2 and the dummy electrode DE belong to the same film layer, any one of the first metal grid, the second metal grid and the dummy metal grid There are a plurality of disconnections between them to ensure electrical independence between the first touch electrode TE1 , the second touch electrode TE2 and the dummy electrode DE.

Further, in the local area I of the touch substrate 10, the extending direction of the first wires 110 of the first touch electrodes TE1 is substantially parallel to the extending direction of the first touch electrodes TE1. The extending direction of the second wire 120 of the first touch electrode TE1 intersects with the extending direction of the first touch electrode TE1 , and the second wire 120 has a disconnection CT1 . It is worth noting that the virtual connection lines CL1 of CT1 at the plurality of disconnections on the second conductive lines 120 are staggered from the adjacent first conductive lines 110 . In other words, the vertical projections of CT1 on the substrate 100 of the disconnections on the second conductive lines 120 do not overlap with the vertical projections of the first conductive lines 110 on the substrate 100 .

Similarly, in the local area I of the touch substrate 10, the extending direction of the third wires 210 of the second touch electrodes TE2 is substantially parallel to the extending direction of the second touch electrodes TE2. The extending direction of the fourth wire 220 of the second touch electrode TE2 intersects with the extending direction of the second touch electrode TE2, and the fourth wire 220 has a disconnection CT2. It is worth noting that the virtual connection lines CL2 of the plurality of disconnections CT2 on the fourth conductive lines 220 are staggered from the adjacent third conductive lines 210 . In other words, the vertical projections of CT2 on the substrate 100 at the disconnection points on the fourth wire 220 do not overlap the vertical projection of the third wire 210 on the substrate 100 . Different from the first touch electrode TE1 and the second touch electrode TE2, the first dummy wire 310 and the second dummy wire 320 of the dummy electrode DE are both provided with a disconnection CT3.

It is worth mentioning that each disconnection CT1 on the first touch electrode TE1 has a width W1 in the extending direction of the corresponding second wire 120 . Each disconnection CT2 on the second touch electrode TE2 has a width W2 in the extending direction of the corresponding fourth wire 220 . In this embodiment, the width W1 of the disconnected portion CT1 of the first touch electrode TE1 may be equal to the width W2 of the CT2 of the disconnected portion of the second touch electrode TE2, but the invention is not limited thereto. In other embodiments, the width W1 of CT1 where the first touch electrode TE1 is disconnected and the width W2 of CT2 where the second touch electrode TE2 is disconnected may also be unequal.

On the other hand, each disconnection CT3 on the dummy electrode DE has a width W3 in the extending direction of the corresponding first dummy wire 310 or the second dummy wire 320 . In this embodiment, the width W1 of the disconnected portion CT1 of the first touch electrode TE1 and the width W2 of the disconnected portion CT2 of the second touch electrode TE2 may be greater than the width W3 of the disconnected portion CT3 of the dummy electrode DE. Accordingly, the difference between the total reflectivity of the first touch electrodes TE1 and the second touch electrodes TE2 and the reflectivity of the dummy electrodes DE can be effectively reduced, thereby reducing the patterned touch electrodes (for example, the first touch electrodes TE1 and TE2 and the dummy electrodes DE). The visibility of the second touch electrodes TE2) under ambient light illumination. However, the present invention is not limited thereto, and according to other embodiments, the width W1 of the disconnected portion CT1 of the first touch electrode TE1 and the width W2 of CT2 of the disconnected portion of the second touch electrode TE2 may also be equal to the disconnected portion of the dummy electrode DE. Open the width W3 of CT3.

It is particularly noted that, since the disconnection point CT1 of the first touch electrode TE1 is disposed on the second wire 120 intersecting with the main conduction path of the current _I1 (eg, the _first wire 110 ), the conduction efficiency of the current I1 There will be no real impact. Similarly, since the disconnection point CT2 of the second touch electrode TE2 is disposed on the fourth wire 220 that intersects with the main conduction path of the current I ₂ (eg, the third wire 210 ), the conduction efficiency of the current I ₂ is not high. will have a real impact. In other words, through the above-mentioned arrangement of the disconnection portion CT1 and the disconnection portion CT2, the increase in the resistance values of the first touch electrode TE1 and the second touch electrode TE2 can be avoided.

Referring to FIG. 2 and FIG. 4 , since the first touch electrode TE1 and the second touch electrode TE2 in this embodiment belong to the same film layer, the second touch electrode TE2 of each touch sensing unit TSU is in the same layer as the second touch electrode TE2 of each touch sensing unit TSU. The intersection of a touch electrode TE1 also has a disconnection CT4, and two parts of the second touch electrode TE2 located on both sides of the disconnection CT4 can be electrically connected to each other through a bridge pattern 250 . For example, the bridge pattern 250 and the second touch electrode TE2 (or the first touch electrode TE1 ) belong to different conductive film layers, and both ends of the bridge pattern 250 can pass through the insulation between the two conductive film layers. The two contact windows 251 of the layer are respectively electrically connected to the above two parts of the second touch electrode TE2 to achieve the purpose of bridging. However, the present invention is not limited to this. In other embodiments, each touch sensing unit TSU may also have a disconnection between the first touch electrode TE1 and the second touch electrode TE2, and the above-mentioned way to bridge.

Referring to FIG. 1 and FIG. 3 , in the partial region II of the touch substrate 10 , the first touch electrode TE1 has a first extension portion TE1a and a second extension portion TE1b. In detail, the extending direction of the second conducting wire 120 of the first extending portion TE1a intersects the extending direction of the first extending portion TE1a, and the second conducting wire 120 of the first extending portion TE1a is provided with a disconnection CT1a. The virtual connection lines CL1 of the plurality of disconnected portions CT1a of the plurality of second wires 120 of the first extension portion TE1a are staggered from the first wires 110 of the first extension portion TE1a. In other words, the vertical projections of the disconnected portions CT1a of the plurality of second wires 120 of the first extension portion TE1a on the substrate 100 do not overlap the vertical projection of the first wires 110 of the first extension portion TE1a on the substrate 100 .

On the other hand, the extending direction of the first conducting wire 110 of the second extending portion TE1b intersects the extending direction of the second extending portion TE1b, and the first conducting wire 110 of the second extending portion TE1b is provided with a disconnection CT1b. The virtual connection lines CL3 of the plurality of disconnected portions CT1b of the plurality of first wires 110 of the second extension portion TE1b are staggered from the second wires 120 of the second extension portion TE1b. In other words, the vertical projections of the disconnected portions CT1b of the plurality of first wires 110 of the second extension portion TE1b on the substrate 100 do not overlap the vertical projection of the second wires 120 of the second extension portion TE1b on the substrate 100 .

It should be noted that in the local area II of the touch substrate 10 , the extending directions of the two extending portions of the first touch electrodes TE1 are different. Therefore, the disconnection of the two extensions is provided on the wire which intersects the main transmission path of the current. Accordingly, an increase in the overall resistance value of the first touch electrode TE1 can be avoided. Further, the disconnection portion CT1a of the first extending portion TE1a has a width W1a in the extending direction of the corresponding second conducting wire 120 . The disconnection portion CT1b of the second extension portion TE1b has a width W1b in the extending direction of the corresponding first conductive wire 110 . In this embodiment, the width W1a of the disconnected portion CT1a of the first extending portion TE1a is equal to the width W1b of the disconnected portion TE1b of the second extending portion TE1b, but the invention is not limited thereto. In other embodiments, the relationship between the widths of the two disconnections can also be adjusted according to the actual design of the touch electrodes (eg, the relationship between the widths of the two extending portions).

On the other hand, in this embodiment, the second touch electrode TE2 may also have two extending portions whose extending directions intersect with each other, which are the first extending portion TE2a and the second extending portion TE2b, respectively. The disconnected portions of the two extending portions of the second touch electrode TE2 can also be configured in a manner similar to the configuration of the disconnected portions of the two extending portions of the first touch electrode TE1, so as to avoid the entirety of the second touch electrode TE2. The resistance value increases. For a specific implementation method, reference may be made to the foregoing detailed description of the disconnection between the two extending portions of the first touch electrode TE1 , which will not be repeated here.

It is worth mentioning that the width (ie, the width W1a and the width W1b) at the disconnection of the two extending portions of the first touch electrode TE1 is greater than the width W3 of the CT3 at the disconnection of the dummy electrode DE, so that the first touch can be effectively reduced. The difference between the reflectivity of the control electrode TE1 and the reflectivity of the dummy electrode DE. It should be understood that the width of the disconnection (not shown) passing through the two extending parts of the second touch electrode TE2 (ie, the first extending part TE2a and the second extending part TE2b ) is larger than that of the disconnecting part of the dummy electrode DE The width W3 of CT3 can further reduce the difference between the total reflectivity of the first touch electrode TE1 and the second touch electrode TE2 and the reflectivity of the dummy electrode DE, thereby reducing the impact of the patterned touch electrodes under ambient light irradiation. visibility. However, the present invention is not limited thereto, and according to other embodiments, the width of the disconnected portion of the two extending portions of the touch electrode may also be equal to the width W3 of the disconnected portion CT3 of the dummy electrode DE.

FIG. 5 is a schematic top view of a touch substrate according to another embodiment of the present invention. Referring to FIG. 5 , the difference between the touch substrate 11 of this embodiment and the touch substrate 10 of FIG. 3 is that the widths of the disconnected portions of the two extending portions of the touch electrodes are different. In this embodiment, the width W1b' of the disconnection portion CT1b' of the second extension portion TE1b' of the first touch electrode TE1' of the touch substrate 11 is smaller than the width W1b' of the first extension portion TE1a of the first touch electrode TE1' The width W1a of the disconnected portion CT1a is greater than the width W3 of the disconnected portion CT3 of the dummy electrode DE.

It is worth mentioning that the width (ie, the width W1a and the width W1b') at the disconnection of the two extending portions of the first touch electrode TE1' is greater than the width W3 of the disconnection CT3 of the dummy electrode DE, which can effectively reduce the width of the first touch electrode TE1'. A difference between the reflectivity of the touch electrode TE1' and the reflectivity of the dummy electrode DE. It should be understood that, the disconnected portion of the second touch electrode TE2 may also be configured by the configuration of the disconnected portion of the first touch electrode TE1' described above. Accordingly, the difference between the total reflectivity of the first touch electrodes TE1 ′ and the second touch electrodes TE2 and the reflectivity of the dummy electrodes DE can be further reduced, thereby reducing the exposure of the patterned touch electrodes under ambient light irradiation. visual.

To sum up, in the touch substrate of an embodiment of the present invention, the first touch electrodes and the second touch electrodes are disposed to intersect, and dummy electrodes are disposed between the two touch electrodes. The vertical projection of the dummy electrode on the substrate does not overlap the vertical projection of the first touch electrode and the second touch electrode on the substrate. Because the difference between the total reflectivity of the first touch electrode and the second touch electrode of each touch sensing unit and the reflectivity of the dummy electrode is less than 3%, the patterned touch electrodes can be effectively reduced when exposed to ambient light. lower visibility, thereby improving the display quality of the touch display panel.

Claims (11)

1. A touch substrate, comprising:

a substrate; and

a plurality of touch sensing units disposed on the substrate, each touch sensing unit including:

a first touch electrode;

the second touch electrode is intersected with the first touch electrode; and

a dummy electrode disposed between the first touch electrode and the second touch electrode, wherein a vertical projection of the dummy electrode on the substrate does not overlap a vertical projection of the first touch electrode and the second touch electrode on the substrate,

wherein a difference between a total reflectivity of the first touch electrode and the second touch electrode of each touch sensing unit and a reflectivity of the dummy electrode is less than 3%.

2. The touch substrate of claim 1, wherein the first touch electrode has a plurality of first conductive lines and a plurality of second conductive lines arranged in a mesh shape, the extending direction of the first conductive lines is parallel to the extending direction of the first touch electrode, the extending direction of the second conductive lines intersects the extending direction of the first touch electrode, and the second conductive lines have a plurality of first breaks.

3. The touch substrate of claim 2, wherein the connection lines of the first disconnections of the second conductive lines are staggered from the first conductive lines.

4. The touch substrate as claimed in claim 2, wherein the dummy electrode has a plurality of dummy conductive lines arranged in a mesh shape, the dummy conductive lines have a plurality of second breaks respectively, each of the first breaks has a first width in an extending direction of the corresponding second conductive line, each of the second breaks has a second width in the extending direction of the corresponding dummy conductive line, and the first width is greater than or equal to the second width.

5. The touch substrate of claim 2, wherein the second touch electrode has a plurality of third conductive lines and a plurality of fourth conductive lines arranged in a mesh shape, the extending direction of the third conductive lines is parallel to the extending direction of the second touch electrode, the extending direction of the fourth conductive lines intersects the extending direction of the second touch electrode, and the fourth conductive lines have a plurality of second breaks.

6. The touch substrate of claim 5, wherein the connection lines of the second breaks of the fourth conductive lines are staggered from the third conductive lines.

7. The touch substrate of claim 2, wherein the first touch electrode comprises a first extension portion and a second extension portion, the extending direction of the second wires of the first extension portion intersects the extending direction of the first extension portion, the second wires of the first extension portion have the first breaks, the extending direction of the first wires of the second extension portion intersects the extending direction of the second extension portion, and the first wires of the second extension portion have a plurality of second breaks.

8. The touch substrate of claim 7, wherein the first break points of the second conductive lines of the first extension are staggered with respect to the first conductive lines of the first extension, and the second break points of the first conductive lines of the second extension are staggered with respect to the second conductive lines of the second extension.

9. The touch substrate of claim 7, wherein each of the first breaks of the first extension portion has a first width in the extending direction of the corresponding second conductive line, each of the second breaks of the second extension portion has a second width in the extending direction of the corresponding first conductive line, and the first width is not equal to the second width.

10. The touch substrate as claimed in claim 9, wherein the dummy electrode has a plurality of dummy conductive lines arranged in a mesh shape, the dummy conductive lines have a plurality of third breaks, each of the third breaks has a third width in an extending direction of the corresponding dummy conductive line, and the first width and the second width are greater than or equal to the third width.

11. The touch substrate of claim 1, wherein the first touch electrode, the second touch electrode and the dummy electrode are on a same film layer and are separated from each other.

Images