CN112041798A - Touch display panel, preparation method thereof and display device - Google Patents
Touch display panel, preparation method thereof and display device Download PDFInfo
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- CN112041798A CN112041798A CN201880091097.8A CN201880091097A CN112041798A CN 112041798 A CN112041798 A CN 112041798A CN 201880091097 A CN201880091097 A CN 201880091097A CN 112041798 A CN112041798 A CN 112041798A
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- 239000010410 layer Substances 0.000 claims abstract description 260
- 239000000758 substrate Substances 0.000 claims abstract description 128
- 239000010409 thin film Substances 0.000 claims abstract description 91
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- 238000000034 method Methods 0.000 claims description 39
- 238000005538 encapsulation Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 18
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- 238000005516 engineering process Methods 0.000 description 2
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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
Abstract
A touch display panel comprises a substrate (100), a thin film transistor layer (200) arranged on the substrate (100), and a light-emitting functional layer (300) arranged on one side, far away from the substrate (100), of the thin film transistor layer (200), wherein the thin film transistor layer (200) comprises a plurality of thin film transistors (210), and the light-emitting functional layer (300) comprises a cathode (310); the touch display panel further comprises a first touch electrode (400) lower than the cathode (310); the orthographic projection of the first touch electrode (400) on the substrate (100) is staggered with the orthographic projection of the cathode (310) on the substrate (100). A preparation method of a touch display panel and a touch device are provided. In the touch display panel, the orthographic projection of the first touch electrode (400) on the substrate (100) and the orthographic projection of the cathode (310) on the substrate (100) are arranged in a staggered manner, so that the shielding of the cathode (310) on the touch signal of the first touch electrode (400) is avoided.
Description
The invention relates to the technical field of touch control, in particular to a touch control display panel, a preparation method thereof and a display device.
With the development of electronic technology, touch screens are widely used in the fields of mobile phones, digital cameras, media players, navigation systems, game devices, displays, and the like. The organic light emitting diode display technology has the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, extremely high response speed and the like. Currently, on a flexible organic light emitting diode display, touch layer integration is to adhere a touch film on the display by using an optical adhesive, but the thickness of the externally-hung display device is thicker.
Disclosure of Invention
In view of the above, the present invention provides a touch display panel with a thin thickness and a good bending resistance, and the specific technical solution is as follows:
a touch display panel, the touch display panel comprising:
the thin film transistor layer comprises a plurality of thin film transistors, and the light-emitting functional layer comprises a cathode;
the touch display panel further comprises a first touch electrode lower than the cathode;
the orthographic projection of the first touch electrode on the substrate is staggered with the orthographic projection of the cathode on the substrate.
Preferably, the touch display panel further comprises a second touch electrode higher than the first touch electrode, and an orthogonal projection of the second touch electrode on the substrate at least partially overlaps with an orthogonal projection of the cathode on the substrate.
Preferably, the touch display panel comprises a pixel area and a non-pixel area, and the thin film transistor is arranged in the pixel area of the touch display panel; the first touch electrode is arranged in a non-pixel area of the touch display panel.
Preferably, the touch display panel further includes a packaging layer, the packaging layer is disposed on a side of the light-emitting functional layer away from the thin film transistor layer, and the second touch electrode is disposed on the packaging layer or in the packaging layer.
Preferably, the substrate comprises a first organic layer and a second organic layer, the second organic layer being disposed between the first organic layer and the thin-film-transistor layer;
the first touch electrode is arranged in the first organic layer; or
The first touch electrode is disposed in the second organic layer.
Preferably, when the first touch electrode is disposed in the substrate, the second touch electrode is disposed in the thin-film transistor layer.
Preferably, the thin-film transistor layer includes:
the grid is arranged on the surface of the substrate;
the grid insulating layer is arranged on the substrate and the surface of the grid, which is far away from the substrate;
the active layer is arranged on the surface, far away from the grid electrode, of the grid electrode insulating layer;
the first touch electrode is arranged on the surface, far away from the grid electrode, of the grid electrode insulating layer, and the first touch electrode is spaced from the active layer;
the source electrode and the drain electrode are respectively arranged on the surface of the active layer far away from the grid electrode, and the source electrode and the drain electrode are arranged at two ends of the active layer at intervals.
Preferably, the light-emitting functional layer comprises an anode, and the anode is electrically connected with the thin film transistor layer; the thin-film transistor layer comprises a flat layer, and part of the anode is arranged on the surface of the flat layer far away from the substrate;
the first touch electrode is arranged on the surface, away from the substrate, of the flat layer, and the first touch electrode is spaced from the anode;
the light-emitting functional layer further comprises a light-emitting layer, and the light-emitting layer is arranged on the surface of the anode far away from the thin film transistor layer; the cathode is arranged on one side of the light-emitting layer far away from the anode.
Preferably, the encapsulation layer includes a first inorganic layer, a third organic layer and a second inorganic layer, which are sequentially stacked, and the second touch electrode is disposed on a side of the second inorganic layer away from the third organic layer.
Preferably, the encapsulation layer includes a first inorganic layer, a third organic layer and a second inorganic layer, which are stacked, and the second touch electrode is disposed between the first inorganic layer and the third organic layer; or the second touch electrode is arranged between the third organic layer and the second inorganic layer.
Preferably, the first touch electrode is a driving electrode or an induction electrode; when the first touch electrode is a driving electrode of the touch display panel, the second touch electrode is an induction electrode; when the first touch electrode is an induction electrode of the touch display panel, the second touch electrode is a driving electrode.
The invention also provides a touch device, which comprises the touch display panel.
The invention also provides a preparation method of the touch display panel, which comprises the following steps:
providing a substrate;
forming a thin film transistor layer on the surface of the substrate, wherein the thin film transistor layer comprises a plurality of thin film transistors;
forming a light-emitting functional layer on one side of the thin-film transistor layer far away from the substrate, wherein the light-emitting functional layer comprises a cathode;
forming a first touch electrode lower than the cathode in the touch display panel; the orthographic projection of the first touch electrode on the substrate is staggered with the orthographic projection of the cathode on the substrate.
Preferably, a second touch electrode higher than the first touch electrode is formed in the touch display panel, and an orthogonal projection of the second touch electrode on the substrate at least partially overlaps with an orthogonal projection of the cathode on the substrate.
Preferably, the touch display panel includes a pixel region and a non-pixel region, and the thin film transistor is formed in the pixel region of the touch display panel; the first touch electrode is formed in a non-pixel region of the touch display panel.
Preferably, the method for manufacturing a touch display panel further includes:
forming a packaging layer on one side of the light-emitting functional layer far away from the thin film transistor layer;
and forming a second touch electrode on or in the packaging layer.
Preferably, the method for manufacturing a touch display panel further includes:
and forming a second touch electrode in the thin film transistor layer when the first touch electrode is formed in the substrate.
Preferably, said "providing a substrate" comprises:
providing a first organic layer;
forming a second organic layer on one side of the first organic layer, the second organic layer being formed between the first organic layer and the thin-film-transistor layer;
forming a first touch electrode in the first organic layer; or
And forming a first touch electrode in the second organic layer.
Preferably, the preparation method of the thin film transistor layer comprises the following steps:
forming a gate on a surface of the substrate;
forming a grid electrode insulating layer on the substrate and the surface of the grid electrode far away from the substrate;
forming an active layer on the surface of the gate insulating layer far away from the gate electrode;
forming a source electrode and a drain electrode on the surface of the active layer far away from the grid electrode respectively, wherein the source electrode and the drain electrode are arranged at two ends of the active layer at intervals;
and forming a first touch electrode on the surface of the grid insulation layer far away from the grid, wherein the first touch electrode is separated from the active layer.
Preferably, the method for preparing the light-emitting functional layer comprises the following steps:
forming an anode on the surface of the thin-film transistor layer far away from the substrate, wherein the thin-film transistor layer comprises a flat layer, and part of the anode is formed on the surface of the flat layer far away from the substrate;
forming a light-emitting layer on the surface of the anode far away from the thin-film transistor layer;
forming a cathode on one side of the light-emitting layer far away from the anode;
and forming a first touch electrode on the surface of the flat layer far away from the substrate, wherein the first touch electrode is spaced from the anode.
The invention has the beneficial effects that: in the touch display panel, the orthographic projection of the first touch electrode on the substrate is staggered with the orthographic projection of the cathode on the substrate, namely the first touch electrode and the cathode are arranged in a mutually avoiding way, so that the shielding of the cathode on the touch signal of the first touch electrode is avoided.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a touch display panel according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of a touch display panel with a first touch electrode on a first organic layer according to the present invention.
Fig. 3 is a schematic structural diagram of an encapsulation layer of a touch display panel according to the present invention.
Fig. 4 is a schematic structural diagram of a touch display panel according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a touch display panel according to a third embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a touch display panel according to a fourth embodiment of the present invention.
Fig. 7 is a schematic diagram of three patterns of the first touch electrode and the second touch electrode provided in the present invention.
Fig. 8 is a schematic structural diagram of a touch device according to the present invention.
Fig. 9 is a flowchart of a method for manufacturing a touch display panel according to the present invention.
Fig. 10 is a flowchart of a method for manufacturing a substrate of a touch display panel according to the present invention.
Fig. 11 is a flowchart of a method for manufacturing a thin film transistor layer of a touch display panel according to the present invention.
Fig. 12 is a flowchart of a method for manufacturing a light-emitting functional layer of a touch display panel according to the present invention.
Fig. 13 is a flowchart illustrating a manufacturing process of a touch display panel according to the present invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, a touch display panel 10 according to a first embodiment of the present disclosure includes a substrate 100, a thin-film transistor layer 200 disposed on the substrate 100, and a light-emitting functional layer 300 disposed on a side of the thin-film transistor layer 200 away from the substrate 100, where the thin-film transistor layer 200 includes a plurality of thin-film transistors 210, and the light-emitting functional layer 300 includes a cathode 310. The light emitting function layer 300 is electrically connected to the thin film transistor layer 200.
The touch display panel 10 may be an organic light emitting diode display touch panel, and the light emitting function layer 300 is an organic light emitting diode.
The touch display panel 10 further includes a first touch electrode 400, and the first touch electrode 400 is lower than the cathode 310, specifically, the layer on which the first touch electrode 400 is located below the cathode 310 in the vertical direction. For example, the first touch electrode 400 is disposed in the substrate 100. It is understood that the substrate 100 may be composed of, but not limited to, one or more layers, when the substrate 100 is one layer, the first touch electrode 400 is located in this layer, and when the substrate 100 is multiple layers, the first touch electrode 400 may be located between the multiple layers or in any one of the multiple layers. It can be understood that the first touch electrode 400 may also be disposed in the thin-film transistor layer 200 or in the light-emitting functional layer 300, and the first touch electrode 400 is disposed in the substrate 100, the thin-film transistor layer 200 or the light-emitting functional layer 300, and due to the protective effect of each film layer on the first touch electrode, the bending resistance of the first touch electrode can be increased, and the touch sensitivity is prevented from being reduced due to the breakage of the first touch electrode in the bending process.
The orthographic projection of the first touch electrode 400 on the substrate 100 is staggered from the orthographic projection of the cathode 310 on the substrate. The "offset" here is specifically: the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by at most 80 percent, for example, in some embodiments, the proportion of the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by 50 percent, preferably, the proportion of the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by less than 20 percent, and the interference of the cathode to the touch signal can be more effectively prevented. In this embodiment, when viewed from directly above the touch display panel 10, the overlapping ratio of the areas of the orthographic projections of the first touch electrode 400 and the cathode 310 is zero percent, that is, the orthographic projection of the first touch electrode 400 on the substrate 100 and the orthographic projection of the cathode 310 on the substrate are not overlapped at all. In the preparation process, the cathode 310 pattern is avoided according to the first touch electrode 400, shielding of the cathode 310 on a touch signal is avoided, the cathode is patterned when the cathode is arranged to avoid the first touch electrode, bending resistance of the cathode is also improved, and compared with the case that the first touch electrode and the cathode are arranged in a laminated manner, the thickness of the touch display panel can be reduced by embedding the first touch electrode in each film layer in order to enable the first touch electrode and the cathode to be arranged in a mutually-avoiding manner, and meanwhile, the touch display panel avoids using an additional adhesive layer, and effectively reduces the thickness of the whole panel. The orthographic projection of the first touch electrode 400 on the substrate 100 refers to a projection plane generated by projecting a parallel projection line on one side of the substrate 100 perpendicular to the surface of the first touch electrode 400.
In a further embodiment, the touch display panel 10 further includes a second touch electrode 600 disposed higher than the first touch electrode 400, specifically, the layer on which the second touch electrode 600 is disposed is located above the first touch electrode 400 in the vertical direction, and an orthogonal projection of the second touch electrode 600 on the substrate 100 at least partially overlaps an orthogonal projection of the cathode 310 on the substrate 100.
The touch display panel 10 includes a pixel area a and a non-pixel area B, and it is understood that the pixel area a and the non-pixel area B are both located in the display area of the touch display panel 10. The thin film transistor 210 is disposed in the pixel region a of the touch display panel 10. The first touch electrode 400 is disposed in the non-pixel region B of the touch display panel 10. The first touch electrode 400 is disposed in the pixel region a, which may affect the light emitting effect of the pixel region, and the first touch electrode 400 is disposed in the non-pixel region B, which may avoid this problem without affecting the touch effect.
In a further embodiment, the touch display panel 10 further includes an encapsulation layer 500, the encapsulation layer 500 is disposed on a side of the light-emitting functional layer 300 away from the thin-film transistor layer 200, and the second touch electrode 600 is disposed on the encapsulation layer 500 or in the encapsulation layer 500. It can be understood that the encapsulation layer 500 has the characteristics of good light transmission effect, water resistance and oxygen insulation.
Referring to fig. 3, in a further embodiment, the encapsulation layer 500 includes a first inorganic layer 510, a third organic layer 520, and a second inorganic layer 530, which are sequentially stacked. The second touch electrode 600 is disposed on a side of the second inorganic layer 530 far from the third organic layer 520. That is, the second touch electrode 600 is disposed on a side of the encapsulation layer 500 away from the thin-film transistor layer 200, that is, on a surface of the second inorganic layer 530 away from the thin-film transistor layer 200.
In a further embodiment, the second touch electrode 600 is disposed between the first inorganic layer 510 and the third organic layer 520. Alternatively, the second touch electrode 600 is disposed between the third organic layer 520 and the second inorganic layer 530. The second touch electrode 600 is disposed in the package layer 500, which further reduces the thickness of the touch display panel and avoids the electrical signal interference between the cathode and the touch electrode, compared to the case where the second touch electrode 600 is stacked on or under the package layer.
Referring to fig. 1 again, in a further embodiment, the touch display panel 10 further includes a protective layer 700, and the protective layer 700 is disposed on a surface of the encapsulation layer 500 away from the light-emitting functional layer 300. The phrase "the second touch electrode 600 is disposed on the side of the second inorganic layer 530 away from the third organic layer 520" also includes that the second touch electrode 600 is disposed in the protection layer 700.
In a further embodiment, substrate 100 includes a first organic layer 110 and a second organic layer 120, with second organic layer 120 disposed between first organic layer 110 and thin-film-transistor layer 200.
The first touch electrode 400 is disposed in the first organic layer 110 (as shown in fig. 2).
Or the first touch electrode 400 is disposed in the second organic layer 120 (as shown in fig. 1).
In a further embodiment, the first organic layer 110 and the second organic layer 120 are organic layers comprising a polyimide material.
In a further embodiment, the substrate 100 further comprises a third inorganic layer 130 and a fourth inorganic layer 140, wherein the third inorganic layer 130 is disposed on a surface of the first organic layer 110, the second organic layer 120 is disposed on a surface of the third inorganic layer 130 away from the first organic layer 110, and the fourth inorganic layer 140 is disposed on a surface of the second inorganic layer 120 away from the third inorganic layer 130. It is understood that the third inorganic layer 130 and the fourth inorganic layer 140 may be buffer layers. It is understood that the third inorganic layer 130 and the fourth inorganic layer 140 include one or a combination of silicon oxide and silicon nitride materials.
Referring to fig. 4, a touch display panel 10 is provided according to a second embodiment of the present invention. When the first touch electrode 400 is disposed in the substrate 100, the second touch electrode 600 is disposed in the thin-film transistor layer 200.
Referring to fig. 5, a touch display panel 10 is provided according to a third embodiment of the present invention. Wherein the first touch electrode 400 is disposed in the thin-film transistor layer 200. It is understood that thin-film transistor layer 200 also includes a pixel region a and a non-pixel region B, thin-film transistor layer 200 includes thin-film transistor 210, and thin-film transistor 210 is disposed in pixel region a of touch display panel 10. Wherein the first touch electrode 400 is disposed in the non-pixel region B of the thin-film transistor layer 200. The specific structure is as follows.
The thin film transistor layer 200 in the touch display panel 10 includes a gate electrode 211, a gate insulating layer 212, an active layer 213, a source electrode 214, and a drain electrode 215.
The gate 211 is disposed on a surface of the substrate 100.
The gate insulating layer 212 is disposed on the substrate 100 and the surface of the gate 211 away from the substrate 100.
The active layer 213 is disposed on a surface of the gate insulating layer 212 away from the gate electrode 211.
The first touch electrode 400 is disposed on a surface of the gate insulating layer 212 away from the gate electrode 211, and the first touch electrode 400 is spaced apart from the active layer 213.
The source electrode 214 and the drain electrode 215 are disposed on the surface of the active layer 213 away from the gate electrode 211, and the source electrode 214 and the drain electrode 215 are disposed at two ends of the active layer 213 at intervals.
In a further embodiment, the thin-film transistor layer 200 further includes a passivation layer 217, and the passivation layer 217 is disposed on the gate insulating layer 212, the source electrode 214, the drain electrode 215, and a portion of the active layer 213 that is away from the substrate 100.
It is understood that the structure of the thin-film transistor layer 200 in this embodiment is not limited to the above structure, and may be a back-channel etching structure thin-film transistor layer, a conventional etching barrier structure thin-film transistor layer, or a coplanar etching structure thin-film transistor layer, or may be a top-gate structure.
Referring to fig. 6, a touch display panel 10 is provided according to a fourth embodiment of the present invention. Wherein the first touch electrode 400 is disposed in the light emitting function layer 300. It is understood that the light emitting function layer 300 also includes a pixel region a and a non-pixel region B, and the first touch electrode 400 is disposed in the non-pixel region B of the light emitting function layer 300.
The light-emitting function layer 300 in the touch display panel 10 includes an anode 320, and the anode 320 is electrically connected to the thin-film transistor layer 200. It is understood that anode 320 is connected to a portion of source 214 to electrically connect anode 320 to thin-film-transistor layer 200. The thin-film transistor layer 200 includes a planar layer 216, and a portion of the anode 320 is disposed on a surface of the planar layer 216 away from the substrate 100.
The first touch electrode 400 is disposed on a surface of the planarization layer 216 away from the substrate 100, and the first touch electrode 400 is spaced apart from the anode 320. It is understood that the anode electrode 320 is disposed in the pixel region a of the planarization layer 216, and the first touch electrode 400 is disposed in the non-pixel region B of the planarization layer 216.
The light emitting function layer 300 further includes a light emitting layer 330, and the light emitting layer 330 is disposed on a surface of the anode 320 far from the thin-film transistor layer 200. The cathode 310 is disposed on a side of the light emitting layer 330 away from the anode 320. The light-emitting layer 330 includes a plurality of organic light-emitting materials, and the organic light-emitting materials can emit one of red, green, and blue light to form red, green, and blue sub-pixels. It can be understood that the orthographic projection of the first touch electrode 400 on the substrate 100 does not overlap with the cathode 310, including the first touch electrode 400 being disposed away from the sub-pixel.
It is understood that, for any embodiment of the present invention, the spacing between two adjacent first touch electrodes 400 may be a sub-pixel level spacing, or may be a pixel level spacing. The same distance between the second touch electrodes 600 may also be a sub-pixel level distance, or may be a pixel level distance. It is understood that the patterned shape of the first touch electrode 400 can be, but is not limited to, a line type and a diamond shape, and the patterned shape of the second touch electrode 600 can also be, but is not limited to, a line type and a diamond shape (see a, b, and c in fig. 7). It can be understood that the pattern of the cathode 310 needs to be avoided according to the first touch electrode 400, and therefore, the cathode 310 in the present invention may include a plurality of sub-cathodes, and the pattern of the sub-cathodes may be, but is not limited to, a square, a diamond, a strip, a curved strip, and the like.
In a further embodiment, the light-emitting functional layer 300 further comprises a pixel defining layer 340, and the pixel defining layer 340 is disposed on the surfaces of the anode 320 and the planarization layer 216 away from the substrate. The first touch electrode 400 is disposed in the pixel defining layer 340.
In a further embodiment, the first touch electrode 400 is a driving electrode or a sensing electrode. When the first touch electrode 400 is a driving electrode of the touch display panel 10, the second touch electrode 600 is a sensing electrode. When the first touch electrode 400 is an induction electrode of the touch display panel 10, the second touch electrode 600 is a driving electrode. It is understood that the first touch electrode 400 and the second touch electrode 600 can be connected in a bridging manner. Or at least one insulating layer is disposed between the first touch electrode 400 and the second touch electrode 600 to electrically separate the two.
Referring to fig. 8, the present invention further provides a touch device 20, wherein the touch device 20 includes the touch display panel 10 according to any of the above embodiments. The touch device 20 may be, but not limited to, an electronic book, a smart Phone (e.g., an Android Phone, an iOS Phone, a Windows Phone), a tablet computer, a flexible palm computer, a flexible notebook computer, a Mobile Internet device (MID, Mobile Internet Devices), or a wearable device, or may be an Organic Light-Emitting Diode (OLED) touch device, an Active Matrix Organic Light Emitting Diode (AMOLED) touch device.
Referring to fig. 9, the present invention provides an embodiment of a method for manufacturing a touch display panel, which includes steps S100, S200, S300, and S400, and the detailed steps are as follows.
Step S100, a substrate 100 is provided.
Step S200, forming a thin film transistor layer 200 on the surface of the substrate 100, where the thin film transistor layer 200 includes a plurality of thin film transistors 210. The method for forming the thin-film transistor layer 200 includes a yellow light process, an inkjet printing process, and a printing process. The thin-film transistor layer 200 includes a pixel region a and a non-pixel region B, where the pixel region a and the non-pixel region B constitute a display region of the touch display panel 10, and the thin-film transistor 210 is formed in the pixel region a.
Step S300, forming a light-emitting functional layer 300 on a side of the thin-film transistor layer 200 away from the substrate 100, where the light-emitting functional layer 300 includes a cathode 310. The method for forming the light-emitting functional layer 300 includes a yellow light process, ink-jet printing and printing. The cathode 310 is formed by a photolithography process. The light emitting function layer 300 is electrically connected to the thin film transistor layer 200.
In step S400, a first touch electrode 400 lower than the cathode 310 is formed in the touch display panel 10, specifically, the layer where the first touch electrode 400 is located below the cathode 310 in the vertical direction. For example, the first touch electrode 400 is formed in the substrate 100, or the first touch electrode 400 is formed in the thin-film transistor layer 200, or the first touch electrode 400 is formed in the light-emitting functional layer 300, because the protective effect of each film layer on the first touch electrode can increase the bending resistance of the first touch electrode, and the touch sensitivity is prevented from being reduced due to the breakage of the first touch electrode in the bending process.
The orthographic projection of the first touch electrode 400 on the substrate 100 is staggered from the orthographic projection of the cathode 310 on the substrate 100. The "offset" here is specifically: the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by at most 80 percent, for example, in some embodiments, the proportion of the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by 50 percent, preferably, the proportion of the area of the orthographic projection of the first touch electrode 400 on the substrate 100 and the area of the orthographic projection of the cathode 310 on the substrate coincide by less than 20 percent, and the interference of the cathode to the touch signal can be more effectively prevented. In this embodiment, when viewed from directly above the touch display panel 10, the overlapping ratio of the areas of the orthographic projections of the first touch electrode 400 and the cathode 310 is zero percent, that is, the orthographic projection of the first touch electrode 400 on the substrate 100 and the orthographic projection of the cathode 310 on the substrate are not overlapped at all. The first touch electrode 400 is formed by a photolithography process. In the preparation process, the cathode 310 pattern is avoided according to the first touch electrode 400, so that the shielding of the cathode 310 on the touch signal is avoided, and meanwhile, the cathode is patterned when the cathode is arranged to avoid the first touch electrode, so that the bending resistance of the cathode is also improved. In addition, compared with the lamination arrangement of the first touch electrode and the cathode, the thickness of the touch display panel can be reduced by embedding the first touch electrode in each film layer so that the first touch electrode and the cathode are arranged in a mutually-avoiding manner. The first touch electrode 400 is formed in the non-pixel region B to prevent the pixel region from being affected by light emission.
In a further embodiment, a second touch electrode 600 higher than the first touch electrode 400 is formed in the touch display panel 10, and an orthogonal projection of the second touch electrode 400 on the substrate 100 at least partially overlaps an orthogonal projection of the cathode 310 on the substrate 100.
In a further embodiment, the method for manufacturing a touch display panel further includes step S500 and step S600, and the detailed steps are as follows.
Step S500, forming an encapsulation layer 500 on a side of the light-emitting functional layer 300 away from the thin-film transistor layer 200. The encapsulation layer 500 is formed by printing.
In step S600, a second touch electrode 600 is formed on the package layer 500 or in the package layer 500. The second touch electrode 600 is formed by a photolithography process.
In a further embodiment, the method for manufacturing the touch display panel further includes the following steps.
When the first touch electrode 400 is formed in the substrate 100, a second touch electrode 600 is formed in the thin-film transistor layer 200.
In a further embodiment, the providing the substrate includes steps S110 and S120 (see fig. 10). The detailed procedure is as follows.
In step S110, a first organic layer 110 is provided.
Step S120, forming a second organic layer 120 on one side of the first organic layer 110, wherein the second organic layer 120 is formed between the first organic layer 110 and the thin-film transistor layer 200.
The "forming the first touch electrode 400 in the substrate 100" includes forming the first touch electrode 400 in the first organic layer 110, or forming the first touch electrode 400 in the second organic layer 120. The first organic layer 110 and the second organic layer 120 are organic layers including polyimide materials.
In a further embodiment, the method for preparing thin-film transistor layer 200 includes step S210, step S220, step S230, and step S240 (see fig. 11). The detailed procedure is as follows.
In step S210, a gate 211 is formed on the surface of the substrate 100.
In step S220, a gate insulating layer 212 is formed on the substrate 100 and the surface of the gate 211 away from the substrate 100.
In step S230, an active layer 213 is formed on the surface of the gate insulating layer 212 away from the gate electrode 211.
In step S240, a source electrode 214 and a drain electrode 215 are formed on the surface of the active layer 213 away from the gate electrode 211, and the source electrode 214 and the drain electrode 215 are spaced at two ends of the active layer 213.
The "forming the first touch electrode 400 in the thin film transistor 200" includes forming the first touch electrode 400 on a surface of the gate insulating layer 212 away from the gate electrode 211, and the first touch electrode 400 is spaced apart from the active layer 213.
In a further embodiment, the method for preparing the light emitting function layer 300 includes steps S310, S320 and S330 (see fig. 12). The detailed procedure is as follows.
Step S310, forming an anode 320 on a surface of the thin-film transistor layer 200 away from the substrate 100, where the thin-film transistor layer 200 includes a flat layer 216, and a portion of the anode 320 is formed on a surface of the flat layer 216 away from the substrate 100.
In step S320, a light emitting layer 330 is formed on the surface of the anode 320 far from the thin-film transistor layer 200.
In step S330, a cathode 310 is formed on a side of the light emitting layer 330 away from the anode 320.
The step of "forming the first touch electrode 400 in the light-emitting functional layer 300" includes forming the first touch electrode 400 on the surface of the planarization layer 216 away from the substrate 100, and the first touch electrode 400 is spaced apart from the anode 320.
Referring to fig. 13, the method for manufacturing the touch display panel in fig. 13 is illustrated, where fig. 13 is to form a first touch electrode 400 in the light-emitting functional layer 300 and a second touch electrode 600 on the encapsulation layer 500. The specific preparation method is described in the following S1-S6.
And S1, providing a substrate, forming a thin film transistor layer on the substrate, and forming an anode 320 on the side of the thin film transistor layer far away from the substrate. The anode 320 is set to avoid for the next step of preparing the first touch electrode 400.
S2, forming a first touch electrode 400 on a side of the thin film transistor layer away from the substrate, wherein the first touch electrode 400 is spaced apart from the anode 320. The first touch electrode 400 is prepared at a position where the anode 320 makes an avoidance.
S3, forming a light emitting layer 330 on the surface of the anode 320 away from the substrate. The light emitting layer 330 includes a plurality of sub-pixels emitting red, green or blue light.
S4, forming a cathode 310 on the side of the light-emitting layer 330 away from the substrate. The cathode 310 includes a plurality of sub-cathodes, which are formed into a bent strip shape, and each sub-cathode corresponds to a plurality of sub-pixel points.
S5, forming an encapsulation layer 500 on the side of the cathode 310 away from the substrate.
S6, forming a second touch electrode 600 on a side of the encapsulation layer 500 away from the substrate. The final result is the S7 combination.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (20)
- A touch display panel, comprising:the thin film transistor layer comprises a plurality of thin film transistors, and the light-emitting functional layer comprises a cathode;the touch display panel further comprises a first touch electrode lower than the cathode;the orthographic projection of the first touch electrode on the substrate is staggered with the orthographic projection of the cathode on the substrate.
- The touch display panel of claim 1, further comprising a second touch electrode higher than the first touch electrode, wherein an orthographic projection of the second touch electrode on the substrate at least partially overlaps with an orthographic projection of the cathode on the substrate.
- The touch display panel according to claim 1, wherein the touch display panel includes a pixel region and a non-pixel region, and the thin film transistor is disposed in the pixel region of the touch display panel; the first touch electrode is arranged in a non-pixel area of the touch display panel.
- The touch display panel of claim 2, further comprising an encapsulation layer disposed on a side of the light-emitting functional layer away from the thin-film transistor layer, wherein the second touch electrode is disposed on or in the encapsulation layer.
- The touch display panel of claim 4, wherein the substrate comprises a first organic layer and a second organic layer, the second organic layer disposed between the first organic layer and the thin-film-transistor layer;the first touch electrode is arranged in the first organic layer; orThe first touch electrode is disposed in the second organic layer.
- The touch display panel of claim 2, wherein the second touch electrode is disposed in the thin-film-transistor layer when the first touch electrode is disposed in the substrate.
- The touch display panel of claim 2, wherein the thin-film transistor layer comprises:the grid is arranged on the surface of the substrate;the grid insulating layer is arranged on the substrate and the surface of the grid, which is far away from the substrate;the active layer is arranged on the surface, far away from the grid electrode, of the grid electrode insulating layer;the first touch electrode is arranged on the surface, far away from the grid electrode, of the grid electrode insulating layer, and the first touch electrode is spaced from the active layer;the source electrode and the drain electrode are respectively arranged on the surface of the active layer far away from the grid electrode, and the source electrode and the drain electrode are arranged at two ends of the active layer at intervals.
- The touch display panel of claim 2, wherein the light-emitting functional layer comprises an anode electrically connected to the thin-film transistor layer; the thin-film transistor layer comprises a flat layer, and part of the anode is arranged on the surface of the flat layer far away from the substrate;the first touch electrode is arranged on the surface, away from the substrate, of the flat layer, and the first touch electrode is spaced from the anode;the light-emitting functional layer further comprises a light-emitting layer, and the light-emitting layer is arranged on the surface of the anode far away from the thin film transistor layer; the cathode is arranged on one side of the light-emitting layer far away from the anode.
- The touch display panel according to claim 4, wherein the encapsulation layer comprises a first inorganic layer, a third organic layer, and a second inorganic layer stacked in this order, and the second touch electrode is disposed on a side of the second inorganic layer away from the third organic layer.
- The touch display panel according to claim 4, wherein the encapsulation layer includes a first inorganic layer, a third organic layer, and a second inorganic layer stacked, and the second touch electrode is disposed between the first inorganic layer and the third organic layer; or the second touch electrode is arranged between the third organic layer and the second inorganic layer.
- The touch display panel of claim 2, wherein the first touch electrode is a driving electrode or a sensing electrode; when the first touch electrode is a driving electrode of the touch display panel, the second touch electrode is an induction electrode; when the first touch electrode is an induction electrode of the touch display panel, the second touch electrode is a driving electrode.
- A touch device, comprising the touch display panel of any one of 1 to 11.
- A preparation method of a touch display panel is characterized by comprising the following steps:providing a substrate;forming a thin film transistor layer on the surface of the substrate, wherein the thin film transistor layer comprises a plurality of thin film transistors;forming a light-emitting functional layer on one side of the thin-film transistor layer far away from the substrate, wherein the light-emitting functional layer comprises a cathode;forming a first touch electrode lower than the cathode in the touch display panel; the orthographic projection of the first touch electrode on the substrate is staggered with the orthographic projection of the cathode on the substrate.
- The method according to claim 12, wherein a second touch electrode higher than the first touch electrode is formed in the touch display panel, and an orthogonal projection of the second touch electrode on the substrate at least partially overlaps with an orthogonal projection of the cathode on the substrate.
- The method according to claim 13, wherein the touch display panel includes a pixel region and a non-pixel region, and the thin film transistor is formed in the pixel region of the touch display panel; the first touch electrode is formed in a non-pixel region of the touch display panel.
- The method for manufacturing a touch display panel according to claim 14, wherein the method for manufacturing a touch display panel further comprises:forming a packaging layer on one side of the light-emitting functional layer far away from the thin film transistor layer;and forming a second touch electrode on or in the packaging layer.
- The method for manufacturing a touch display panel according to claim 14, wherein the method for manufacturing a touch display panel further comprises:and forming a second touch electrode in the thin film transistor layer when the first touch electrode is formed in the substrate.
- The method for manufacturing a touch display panel according to claim 13, wherein the providing a substrate comprises:providing a first organic layer;forming a second organic layer on one side of the first organic layer, the second organic layer being formed between the first organic layer and the thin-film-transistor layer;forming a first touch electrode in the first organic layer; orAnd forming a first touch electrode in the second organic layer.
- The method of claim 13, wherein the thin-film transistor layer comprises:forming a gate on a surface of the substrate;forming a grid electrode insulating layer on the substrate and the surface of the grid electrode far away from the substrate;forming an active layer on the surface of the gate insulating layer far away from the gate electrode;forming a source electrode and a drain electrode on the surface of the active layer far away from the grid electrode respectively, wherein the source electrode and the drain electrode are arranged at two ends of the active layer at intervals;and forming a first touch electrode on the surface of the grid insulation layer far away from the grid, wherein the first touch electrode is separated from the active layer.
- The method of manufacturing a touch display panel according to claim 13, wherein the method of manufacturing the light-emitting functional layer comprises:forming an anode on the surface of the thin-film transistor layer far away from the substrate, wherein the thin-film transistor layer comprises a flat layer, and part of the anode is formed on the surface of the flat layer far away from the substrate;forming a light-emitting layer on the surface of the anode far away from the thin-film transistor layer;forming a cathode on one side of the light-emitting layer far away from the anode;and forming a first touch electrode on the surface of the flat layer far away from the substrate, wherein the first touch electrode is spaced from the anode.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2018/083409 WO2019200539A1 (en) | 2018-04-17 | 2018-04-17 | Touch display panel and method for manufacturing same, and display device |
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Application publication date: 20201204 |