CN108710446B - Touch control display panel - Google Patents
Touch control display panel Download PDFInfo
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- CN108710446B CN108710446B CN201810329988.4A CN201810329988A CN108710446B CN 108710446 B CN108710446 B CN 108710446B CN 201810329988 A CN201810329988 A CN 201810329988A CN 108710446 B CN108710446 B CN 108710446B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
Abstract
The invention provides a touch display panel, comprising: a first substrate; a thin film transistor disposed on the first substrate; the pixel electrode layer is arranged on the thin film transistor and is connected with the drain electrode or the source electrode of the thin film transistor through a contact hole; and the common electrode layer is arranged on the first substrate and is positioned below the pixel electrode layer, the common electrode layer is divided into a plurality of common electrodes, a slit is formed between every two adjacent common electrodes, and the slit is connected with the contact hole positioned above the slit. The touch display panel provided by the invention improves the touch detection capability and the display effect.
Description
Technical Field
The invention relates to the field of display touch, in particular to a touch display panel.
Background
With the development of human-computer interaction technology, touch technology is increasingly used on various displays. Capacitive touch technology is widely used because of its wear resistance, long life, low maintenance cost for users, and the ability to support gesture recognition and multi-touch.
Capacitive touch technologies can be classified into self-capacitance touch technologies and mutual capacitance touch technologies according to the detection method of capacitance between different objects. Self-capacitive touch technology detects the presence, position, and motion of an input object on a touch screen according to changes in capacitance between the input object and an electrode. The mutual capacitive touch technology detects the existence, position and motion of an input object on a touch screen according to the capacitance change between electrodes caused by the input object.
However, for the mutual capacitance touch technology, the electrode layer needs to be divided into a plurality of touch electrodes to detect the capacitance at different positions of the display panel. Thus, a slit is formed between adjacent touch electrodes. Especially, when the common electrode is reused as a touch electrode, the common electrode may have some openings for connecting the pixel electrode and the source/drain electrodes, and such an arrangement may cause a Critical Dimension (CD) of the common electrode between the openings and the slits to be too thin, which may increase process difficulty, affect an aperture ratio of the panel, increase resistance of the common electrode, and further cause problems of increased signal delay on the common electrode, and the like, thereby affecting touch detection capability and display effect of the touch display panel.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides a touch display panel, which improves the touch detection capability and display effect of the touch display panel.
According to an aspect of the present invention, there is provided a touch display panel including: a first substrate; a thin film transistor disposed on the first substrate; the pixel electrode layer is arranged on the thin film transistor and is connected with the drain electrode or the source electrode of the thin film transistor through a contact hole; and the common electrode layer is arranged on the first substrate and is positioned below the pixel electrode layer, the common electrode layer is divided into a plurality of common electrodes, a slit is formed between every two adjacent common electrodes, and the slit is connected with the contact hole positioned above the slit.
Compared with the prior art, the slit formed between the adjacent common electrodes is connected with the contact hole positioned above the slit, so that the touch detection capability and the display effect of the touch display panel are improved, and the touch display panel has the following advantages:
1) the critical dimension of the common electrode is increased, and the difficulty of the patterning process of the common electrode is reduced;
2) the resistance of the common electrode is reduced, thereby reducing the signal delay on the common electrode.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a schematic diagram of a touch display panel of the prior art.
Fig. 2 shows a schematic cross-sectional view of a prior art touch display panel AA'.
Fig. 3 is a schematic diagram illustrating a touch display panel according to a first embodiment of the invention.
Fig. 4 shows a schematic cross-sectional view of a portion of a touch display panel BB' according to a first embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating a touch display panel according to a second embodiment of the invention.
Fig. 6 is a schematic diagram illustrating a touch display panel according to a third embodiment of the invention.
FIG. 7 shows a schematic diagram of touch driving electrodes and touch sensing electrodes according to the present invention.
Fig. 8 illustrates a cross-sectional view of a touch display panel according to the present invention.
Fig. 9 shows a schematic diagram of a common electrode according to the prior art.
Fig. 10 shows a resistance equivalent diagram of a common electrode according to the related art.
Fig. 11 shows a schematic view of a common electrode according to a first embodiment of the present invention.
Fig. 12 shows a resistance equivalent diagram of the common electrode according to the first embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.
The drawings of the present invention are only for illustrating the relative positional relationship, the layer thicknesses of some parts are exaggerated in a drawing manner for easy understanding, and the layer thicknesses in the drawings do not represent the proportional relationship of the actual layer thicknesses.
It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers may also be present.
The touch display panel 100 shown in fig. 1 and 2 can be referred to in the prior art. The touch display panel 100 includes a substrate 190, a plurality of gate lines 140, a plurality of data lines 130, a plurality of thin film transistors 160, a pixel electrode layer 120, and a common electrode layer 110. The pixel electrode layer 120 is connected to the drain or source 162 of the thin film transistor 160 through the first contact hole 121. The common electrode layer 110 is divided into a plurality of common electrodes 111, and slits 112 are formed between adjacent common electrodes 111 (for example, the common electrode 111a and the common electrode 111 b).
Since the common electrode layer 110 is located between the pixel electrode layer 120 and the metal layer where the drain or source 162 of the thin film transistor 160 is located, the first contact hole 121 needs to pass through the common electrode layer 110 to connect the pixel electrode layer 120 and the drain or source 162 of the thin film transistor 160, and therefore, the common electrode 111 has an opening 113 through which the first contact hole 121 passes.
However, in the prior art, the critical dimension (as shown by d1 and d2) of the common electrode 111 between the slit 112 and the opening 113 is too thin, which increases the difficulty of manufacturing the common electrode 111. Meanwhile, the common electrode 111 has such a shape that the resistance of the common electrode 111 is larger than that of other common electrodes having no opening, thereby causing a signal delay on the common electrode 111.
In order to overcome the defects of the prior art, the present invention provides a touch display panel. First, referring to fig. 3 and fig. 4, a first embodiment of a touch display panel provided by the present invention is described.
In the first embodiment, the touch display panel 200 includes a substrate 290, a plurality of thin film transistors 260, a pixel electrode layer 220, and a common electrode layer 210.
A plurality of thin film transistors 260 are disposed over a substrate 290. Preferably, at least one thin film transistor 260 is disposed in each pixel region 280. For example, in the present embodiment, only one thin film transistor 260 is disposed in each pixel region 280. In some variations, a plurality of tfts 260 may be disposed in the pixel region 280. Each thin film transistor 260 includes a gate electrode 261, a source electrode 263, and a drain electrode 262. The drain electrode 262 of the thin film transistor 260 is connected to the pixel electrode layer 220 through the first contact hole 221 (in the present embodiment, the drain electrode 262 is connected to the pixel electrode layer 220 through the first contact hole 221, but the present embodiment is not limited thereto, and the source electrode 263 may be connected to the pixel electrode layer 220 through the first contact hole 221).
In this embodiment, the thin film transistor 260 is a top gate thin film transistor. The semiconductor layer 250 of the thin film transistor 260 is located between the metal layer where the gate electrode 261 of the thin film transistor 260 is located and the substrate 290. The metal layer on which the source electrode 263 and the drain electrode 262 of the thin film transistor 260 are located is located above the metal layer on which the gate electrode 261 is located. The source electrode 263 of the thin film transistor 260 is connected to the semiconductor layer 250 through a contact hole. The drain electrode 262 of the thin film transistor 260 is connected to the semiconductor layer 250 through the contact hole.
The structure of the thin film transistor 260 is not limited thereto, and it may have a bottom gate structure. The structure of the tft 260 may vary according to different embodiments, and is not described in detail herein.
In this embodiment, the material of the semiconductor layer 250 may be any one of amorphous silicon, polysilicon, and oxide, which is not limited in this embodiment of the invention.
The pixel electrode layer 220 is disposed over the thin film transistor 260. The pixel electrode layer 220 is patterned into a plurality of pixel electrodes. Preferably, one pixel electrode is disposed in one pixel region 280. The pixel electrode layer 220 is connected to the drain electrode 262 (or the source electrode 263) of the thin film transistor 260 through the first contact hole 221. The pattern of the pixel electrode layer 220 may vary from embodiment to embodiment.
The common electrode layer 210 is disposed on the substrate 290 and below the pixel electrode layer 220. Preferably, an insulating layer is further provided between the common electrode layer 210 and the pixel electrode layer 220. The common electrode layer 210 is divided into a plurality of common electrodes 211.
Specifically, in the embodiment of the present invention, the common electrode 210 is reused as a touch electrode.
By changing the locus of the slits of the related art, the slits 212 formed between the adjacent common electrodes 211 (e.g., the common electrode 211a and the common electrode 211b) are extended to the position of the communication opening 213, so that the slits 212 formed between the adjacent common electrodes 211 are connected to the first contact hole 221 located above the slits 212. Specifically, since the common electrode layer 210 is located between the pixel electrode layer 220 and the metal layer where the drain electrode 262 (or the source electrode 263) of the thin film transistor 260 is located, the first contact hole 221 needs to penetrate through the common electrode layer 210 to connect the pixel electrode layer 220 and the drain electrode 262 (or the source electrode 263) of the thin film transistor 260, and therefore, the common electrode 211 further includes the opening 213 connected to the first contact hole 221. For example, the opening 213 is formed by the first contact hole 221 through the common electrode 211. In some variations, the inner diameter of the opening 213 is larger than the outer diameter of the first contact hole 221 on the common electrode layer 210 to prevent the first contact hole 221 from contacting the common electrode layer 210 and causing short circuit, in consideration of process variations. The slit 212 formed between the adjacent common electrodes 211 is connected to the opening 213 to be connected to a portion of the first contact hole 221 located above the slit 212.
Specifically, in the present embodiment, slits 212 extending in the Y direction are formed between adjacent common electrodes 211, and each slit 212 is connected to a portion of the first contact hole 221 located above the slit 212. In some embodiments, since the common electrode 211 may have one first contact hole 221 in each pixel region 280, a portion of the first contact hole 221 is not connected to the slit 212.
In the present embodiment, the touch display panel 200 further includes a plurality of gate lines 240 and a plurality of data lines 230. A plurality of gate lines 240 are disposed over a substrate 290. The gate line 240 is preferably located in the same metal layer as the gate electrode 261 of the thin film transistor 260. The data line 230 is preferably located in the same metal layer as the source electrode 263 and the drain electrode 262 of the tft 260.
The plurality of gate lines 240 extend in the X direction and are arranged in the Y direction. A plurality of data lines 230 are disposed over the substrate 290. The plurality of data lines 230 extend in the Y direction and are arranged in the X direction. The extending direction herein does not limit the gate line 240 and the data line 230 to a straight line extending in the X direction and the Y direction, and the gate line 240 and the data line 230 may be curved in the X direction and the Y direction. The gate line 240 is cross-insulated from the data line 230 on the substrate 290. The regions surrounded by the plurality of gate lines 240 and the plurality of data lines 230 define a plurality of pixel regions 280.
In this embodiment, the metal layer where the gate line 240 is located between the metal layer where the data line 230 is located and the substrate 290. However, the positional relationship between the metal layer where the gate line 240 is located and the metal layer where the data line 230 is located is not limited thereto. Specifically, the common electrode layer 210 is located on the metal layer where the data line 230 is located. The slits 212 formed between the adjacent common electrodes 211 expose at least a portion of the data line 230. In the present embodiment, the corresponding data line between two adjacent openings is not exposed, that is, the slit 212 formed between the adjacent common electrodes 211 and extending along the Y direction exposes a portion of the data line 230. The common electrode 211 covers a portion of the data line 230 corresponding to the first contact hole 221. In other words, the common electrode 211 covers the data line 230 at a position corresponding to the first contact hole 221 in the X direction.
According to the embodiment of the present invention, the critical dimension d3 of the common electrode 211 at the slit 212 of the touch display panel 200 is increased, which reduces the difficulty of the manufacturing process of the common electrode 211, and at the same time, the common electrode 211 increases the portion covering part of the data line 230, such a design can increase the area of the common electrode 211 on the basis of ensuring that the adjacent common electrodes are insulated from each other, thereby reducing the resistance on the common electrode 211 and further improving the signal delay on the common electrode 211.
Fig. 5 shows a schematic diagram of a touch display panel 300 according to a second embodiment of the invention. The structure of the touch display panel 300 is similar to that of the touch display panel 200 in the embodiment corresponding to fig. 3 and 4, and the same parts are not repeated herein, and reference is made to the foregoing contents, and different from the structure of the touch display panel 200 in the embodiment corresponding to fig. 3 and 4, the slit 312 formed between the adjacent common electrodes 311 completely exposes the data line 330. The slit trace of the prior art is not substantially changed, and the opening 313 is communicated with the slit 312, so that the process difficulty of the common electrode 311 at the critical dimension d1 in the prior art is not considered. Although the critical dimension d4 of the common electrode 311 between the slit 312 and the opening 313 not connected to the slit 312 is thinner than the critical dimension d3 in the embodiments of fig. 3 and 4, the process difficulty of the common electrode 311 at the critical dimension d1 in the prior art is not considered in the present embodiment. Meanwhile, the shape of the common electrode 311 is equivalent to the shape of the common electrode 111 of the related art, and the positions corresponding to the contact holes in the X direction are reduced by a part. In other words, the shape of the common electrode 311 is substantially similar to the shape of the common electrode 111 in the prior art, so that the mask plate is slightly modified during the manufacturing process of the common electrode 311, thereby simplifying the manufacturing process of the common electrode 311 and reducing the manufacturing cost.
Specifically, in the present embodiment, the slit 312 is connected to the opening 313 (connecting the first contact hole) located on the side of the slit 312. In some variations, as shown in fig. 6, the slit 712 may also be connected to the opening 713 (connected to the first contact hole) at two sides of the slit 712, so as to further reduce the difficulty of manufacturing the common electrode.
Specifically, in the embodiment of the present invention, the common electrode is reused as the touch electrode. Preferably, the common electrode is reused as a mutual capacitance type touch driving electrode. The plurality of common electrodes extend in the Y direction. The projection of each common electrode on the substrate covers at least one pixel area along the X direction. Wherein the X-direction and the Y-direction are orthogonal. For example, in the embodiment shown in fig. 3, the projection of each common electrode 211 on the substrate covers two pixel regions 280 in the X direction. Slits 212 extending in the Y direction are formed between adjacent common electrodes 211. When the common electrode 211 is reused as a mutual capacitance type touch driving electrode, referring to fig. 7 and 8, the position where touch occurs is determined by measuring the capacitance between the overlapping area of the touch driving electrode 211 and the touch sensing electrode 610. In the embodiment shown in fig. 7, a plurality of touch sensing electrodes 610 extending along the X direction may also be disposed on another substrate 620 and opposite to the touch driving electrodes to form a capacitance between the touch driving electrodes and the overlapping areas of the touch sensing electrodes. The touch sensing electrode 610 is disposed on a side of the substrate 620 away from the substrate 290. The other substrate 620 may be, for example, a color filter substrate. In some variations, a plurality of touch sensing electrodes 610 extending along the X direction may also be disposed on the substrate 290. In other embodiments, the common electrode 211 may also be reused as a self-capacitance touch electrode, which is not limited in the present disclosure.
Since the common electrode 211 is multiplexed as a touch electrode, the resistance of the common electrode 211 plays an important role in touch accuracy, accuracy and real-time performance of the touch display panel. According to the invention, by changing the shape of the common electrode, compared with the prior art, the resistance of the common electrode can be reduced to a certain extent, and the touch precision of the touch display panel is improved. The resistance of the common electrode provided by the present invention and the prior art common electrode will be compared with fig. 9 to 12.
Referring first to fig. 9 and 10, fig. 9 shows a plurality of common electrodes 411 (i.e., the common electrode 111 shown in fig. 1) in the prior art. The smaller critical dimension (e.g., d1 and d2) of the common electrode 411 between the slit 412 and the opening 413 increases the difficulty of the common electrode 411 manufacturing process. In fig. 9, each common electrode 411 includes only two openings 413 (connecting the first contact holes) arranged in the Y direction, and each common electrode 411 covers two pixel regions 480 in the X direction.
According to the common electrode 411 shown in fig. 9, the resistance equivalent diagram of the common electrode 411' for calculating one pixel region 480 as shown in fig. 10 is provided in units of one pixel region 480. In one pixel region 480, the equivalent common electrode 411 'is equivalent to a resistor 411A', a resistor 411B ', and a resistor 411C'. The resistor 411A ' and the resistor 411B ' are connected in parallel and then connected in series with the resistor 411C '. Each resistance can be calculated according to the formula R ═ ρ L/S, where R denotes the resistance value to be calculated, ρ denotes the resistivity of the common electrode, L denotes the resistance length, and S denotes the cross-sectional area of the resistance. In the coating of the common electrode, it can be equivalently considered that the common electrode has the same thickness d. Thus, the sectional area S of the resistor is Wd, and W is the width of the resistor. The resistance calculation formula is accordingly: r ═ ρ L/(Wd).
The resistance value of the resistor 411A' is first calculated:
the length of resistor 411A 'is the same as the length of equivalent opening 413' of 12.1 microns. The width of the resistor 411A 'is 2 microns (d2) as shown in FIG. 10, and the resistance R of the resistor 411A' is1＝ρ12.1/(2d)＝ρ6.05/d。
The resistance value of resistor 411B' is then calculated:
the length of resistor 411B 'is the same as the length of equivalent opening 413' of 12.1 microns. The width of the resistor 411B 'is 2 microns (d1) as shown in FIG. 10, and the resistance R of the resistor 411B' is2＝ρ12.1/(2d)＝ρ6.05/d。
Finally, the resistance value of the resistor 411C' is calculated:
the length of the resistor 411C 'is the difference between 57.3 microns of the length of the pixel area 480 and 12.1 microns of the length of the equivalent opening 413', i.e., 45.2 microns. The width of the resistor 411C 'is the difference between the width of the pixel area 480 of 19.1 micrometers and the width of the slit of 3 micrometers (the figure shows that the equivalent opening 413' is half of the two slits on the left and right of 1.5 micrometers), i.e. 16.1 micrometers. Resistance value R of resistor 411C3＝ρ45.2/(16.1d)≈ρ2.807/d。
The resistance of the equivalent common electrode 411' with one pixel area 480 as a unit is:
R1R2/(R1+R2)+R3≈ρ3.025/d+ρ2.807/d＝ρ5.832/d。
next, referring to fig. 11 and 12, fig. 11 shows a plurality of common electrodes 511 (the same shape as the common electrode 211 shown in fig. 3) of the first embodiment of the present invention. The slit 512 is connected to an opening 513 (connecting the first contact hole). The common electrode 511 shown in fig. 11 has a similar size to the common electrode 411 shown in fig. 9, and each common electrode 511 covers two pixel regions 580 in the X direction. In the common electrode 511 shown in fig. 11, the critical dimension of the common electrode 511 is d3, and the critical dimension d3 is equal to the sum of the critical dimension d1, the critical dimension d2 and the slit width in fig. 9. In some variations, d3 may be larger than d1 and d 2. In these embodiments, the critical dimension d3 is compared with the critical dimensions d1 and d2, thereby reducing the difficulty of the common electrode 511 manufacturing process.
According to the common electrode 511 shown in fig. 11, the resistance equivalent diagram of the common electrode 511' for calculating one pixel region 580 as shown in fig. 12 is provided in units of one pixel region 580. In one pixel region 580, the equivalent common electrode 511 ' is equivalent to the resistor 511A ' and the resistor 511B '. The resistor 511A 'and the resistor 511B' are connected in series. Likewise, each resistance may be calculated according to the formula R ═ ρ L/(Wd).
The resistance value of the resistor 511A' is first calculated:
the length of resistor 511A 'is the same as the length of equivalent opening 513' of 12.1 microns. The width of resistor 511A 'is 7 microns as shown in FIG. 12 (i.e., d3, i.e., the sum of d1, d2 and the slit width), the resistance R of resistor 511A' is then the same as the resistance R of resistor 511A1’＝ρ12.1/(7d)≈ρ1.7285/d。
The resistance value of resistor 511B' is then calculated:
the length of the resistor 511B 'is equal to the difference between the length of the pixel 580 and 57.3 microns and the length of the equivalent opening 513' is 12.1 microns, i.e., 45.2 microns. The width of resistor 511B' is the difference between the width of pixel 580 of 19.1 microns and the width of the slit of 3 microns, i.e., 16.1 microns. The resistance value R of the resistor 511B2’＝ρ45.2/(16.1d)≈ρ2.807/d。
The resistance of the equivalent common electrode 511' in units of one pixel region 580 is:
R1’+R2’≈ρ1.7285/d+ρ2.807/d＝ρ4.5355/d。
according to the calculation result:
in the prior art, the resistance of the equivalent common electrode 411' is ρ 5.832/d in units of one pixel area 480. In the first embodiment of the present invention, the resistance of the equivalent common electrode 511' is ρ 4.5355/d with one pixel area 580 as a unit. In this manner, the resistance of the equivalent common electrode 511 'is reduced by 20% from the resistance of the equivalent common electrode 411'.
It will be understood by those skilled in the art that the specific dimensions given in fig. 9-12 are merely illustrative for calculating the resistance value, and the dimensions of the common electrode, the pixel region, and the slit of the present invention are not limited thereto, and may vary with different embodiments.
Compared with the prior art, the slit formed between the adjacent common electrodes is connected with the contact hole positioned above the slit, so that the touch detection capability and the display effect of the touch display panel are improved, and the touch display panel has the following advantages:
1) the critical dimension of the common electrode is increased, and the difficulty of the patterning process of the common electrode is reduced;
2) the resistance of the common electrode is reduced, thereby reducing the signal delay on the common electrode.
Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
Claims (9)
1. A touch display panel, comprising:
a substrate;
a thin film transistor disposed over the substrate;
the pixel electrode layer is arranged on the thin film transistor and is connected with the drain electrode or the source electrode of the thin film transistor through a first contact hole;
the common electrode layer is arranged above the substrate and below the pixel electrode layer, the common electrode layer is divided into a plurality of common electrodes, a slit is formed between every two adjacent common electrodes, the common electrodes further comprise openings for the first contact holes to penetrate through, the slits are communicated with the openings, and the common electrodes are multiplexed into self-capacitance touch electrodes.
2. The touch display panel of claim 1, wherein the slit is in communication with openings on both sides of the slit.
3. The touch display panel according to claim 1, wherein an insulating layer is disposed between the pixel electrode layer and the common electrode layer.
4. The touch display panel of claim 1, wherein the thin film transistor is a top-gate thin film transistor.
5. The touch display panel of claim 1, comprising a plurality of gate lines extending in an X direction and arranged in a Y direction, and a plurality of data lines extending in the Y direction and arranged in the X direction, wherein the X direction and the Y direction are orthogonal.
6. The touch display panel of claim 5, wherein a plurality of the common electrodes extend in the Y direction.
7. The touch display panel of claim 6, wherein the common electrode layer is located on the metal layer where the data lines are located, and the slits formed between adjacent common electrodes expose at least a portion of the data lines.
8. The touch display panel according to claim 7, wherein the common electrode covers the data line at a position corresponding to the first contact hole in the X direction.
9. The touch display panel of claim 7, wherein the slits between adjacent common electrodes completely expose the data lines.
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| CN107085481B (en) * | 2017-04-21 | 2020-06-05 | 厦门天马微电子有限公司 | Array substrate, touch display panel and display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108710446A (en) | 2018-10-26 |
| CN108363516B (en) | 2021-04-02 |
| CN108646953B (en) | 2021-05-25 |
| CN108646953A (en) | 2018-10-12 |
| CN108363516A (en) | 2018-08-03 |
| CN105511707A (en) | 2016-04-20 |
| CN105511707B (en) | 2018-06-22 |
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