CN106803514B - Touch-control integrated organic light-emitting diode display device - Google Patents
Touch-control integrated organic light-emitting diode display device Download PDFInfo
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- CN106803514B CN106803514B CN201710096217.0A CN201710096217A CN106803514B CN 106803514 B CN106803514 B CN 106803514B CN 201710096217 A CN201710096217 A CN 201710096217A CN 106803514 B CN106803514 B CN 106803514B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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Abstract
The invention describes an organic light emitting diode display device integrated with touch control. A display device disposed in the display area; a thin film encapsulation layer covering the display device of the display area; the touch device comprises a touch electrode arranged in the display area and a touch wire arranged in the non-display area; at least part of the touch wiring and the first metal layer or the second metal layer are arranged in the same layer; the shielding electrode covers the touch wire and is insulated from the touch device; the shielding electrode is electrically connected with a fixed potential, and the invention prevents the occurrence of false alarm points and improves the touch control precision on the basis of not adding a new film layer.
Description
Technical Field
The invention relates to the field of organic light emitting display, in particular to an organic light emitting diode display device integrating touch control.
Background
With the increasing number of multimedia devices, people increasingly talk about touch screens because touch screens, as a latest input device, have many advantages of being sturdy and durable, fast in response, space-saving, easy to communicate, and the like. By using the technology, the user can operate the host machine only by lightly touching the display screen with fingers, so that the man-machine interaction is more straightforward, and the technology is greatly convenient for users who do not know the computer operation.
As the organic light emitting display device gradually enters the life of people, the touch technology is also increasingly applied to the organic light emitting diode display device in recent years. On-Cell technology, which is currently applied to touch schemes for organic light emitting diode display devices, is also emerging in some products. In a general On-Cell structure, a touch sensor is directly formed in a display panel, integrated with the display panel, and located On a cathode, thereby eliminating a substrate. The structure based On the On-Cell can reduce the number of stacked layers, and meets the requirements of double promotion of lightness and thinness and light transmittance, the structure of the On-Cell is also very favorable for the design of a narrow frame, and the structure can be made into a curved surface, so that the shadow can be seen from the middle high end to the low end of the product.
In the On-Cell structure in the prior art, a thin film package structure is generally used On an OLED panel, a touch electrode is disposed On the thin film package layer, a touch trace is correspondingly disposed at a periphery of an effective display area, and the touch trace and the touch electrode are wired On the same layer. In practical use, the touch trace is easily interfered by the outside to generate an induction signal. When a finger touches the wiring area, the touch wiring can generate a sensing signal, and in addition, the edge of the display area of the touch screen can also generate sensing for the touch wiring close to the display area, so that the signal quantity of the touch electrode corresponding to the touch wiring is increased, the touch precision is reduced, and the phenomenon of point error reporting is caused, so that the touch screen can not work normally.
Disclosure of Invention
In view of the foregoing, the present invention provides an integrated touch organic light emitting diode display device.
The invention provides an integrated touch organic light emitting diode display device, which comprises: a substrate including a display area and a non-display area surrounding the display area;
a display device disposed in the display area on the substrate, including a first metal layer and a second metal layer;
a thin film encapsulation layer covering the display device of the display area;
the touch device comprises a touch electrode and a touch wire connected with the touch electrode; the touch electrode is arranged on the thin film packaging layer of the display area; at least part of the touch routing is arranged in the non-display area and is arranged on the same layer as the first metal layer or the second metal layer;
the shielding electrode is insulated from the touch-control routing wire, and at least part of projection of the shielding electrode on the substrate is overlapped with the projection of the touch-control routing wire on the substrate along the direction vertical to the substrate;
the shield electrode is electrically connected to a fixed potential.
According to the invention, on the basis of not increasing Mask and the existing process, the shielding electrode of the touch wire is arranged on the packaging layer, a new film layer is not required to be added, the influence of the touch signal at the touch wire on the touch performance can be improved, and the touch precision is improved.
Drawings
FIG. 1 is a schematic plan view of a touch-based display device according to the prior art;
fig. 2 is a schematic plan view of an integrated touch-sensing oled display device according to the present invention;
FIG. 3 is a cross-sectional view of the display device of FIG. 2 taken along the line A-A;
fig. 4 is a schematic plan view illustrating another touch-sensing integrated organic light emitting diode display device according to the present invention;
FIG. 5 is a cross-sectional view of the display device of FIG. 4 taken along the line B-B;
fig. 6 is a cross-sectional view of still another touch-sensing integrated organic light emitting diode display device provided in the present invention;
fig. 7 is a schematic plan view illustrating another touch-sensing integrated organic light emitting diode display device according to the present invention;
FIG. 8 is a cross-sectional view of the display device of FIG. 8 taken along the direction C-C;
fig. 9 is a cross-sectional view of the display device in fig. 8 along the direction D-D.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, fig. 1 is a schematic plan view of a touch-integrated display device in the prior art, in which the plane shown is a display surface of the display device, an area within a dotted line S1 is a display area (i.e., an AA area), and the periphery of the display area includes an electrical VSR, a compensation unit, and the like (not shown in the figure). The display device includes a touch portion formed on the display panel, and the touch portion includes a touch electrode 10 and a touch trace 20. The touch electrodes include a plurality of first touch electrodes 11 parallel to the first direction (X direction) and a plurality of second touch electrodes 12 parallel to the second direction (Y direction), and the first touch electrodes and the second touch electrodes are vertically overlapped. The touch traces are disposed in the non-display area at the periphery of the display area, and an external touch circuit (not shown) is connected to the touch electrodes through the touch traces 20. Therefore, when a hand or a pen of a user contacts the display screen, a signal from the touch electrode corresponding to the contact position is transmitted to the touch circuit through the touch trace, and the touch circuit can determine the touch position according to position information of the touch point in the X direction and the Y direction obtained from the first touch electrode and the second touch electrode.
When a user uses the display device, fingers do not contact the display area of the display device, and often when the user uses a touch function, the fingers or the pen contact the edge area of the display area or the non-display area close to the display area, and the touch traces are arranged in parallel at the edge of the display area, so that the fingers easily touch the trace area, the touch traces are induced, the signal quantity of the touch electrode corresponding to the induced touch trace is increased, the error report point occurs, and the touch precision of the edge area is reduced; the touch trace is disposed at a position far from the display area, which is not favorable for the narrow frame design of the display device.
In view of the above, the present invention provides an integrated touch organic light emitting diode display device.
As shown in fig. 2, fig. 2 is a schematic plan view of an integrated touch-control organic light emitting diode display device provided by the present invention, wherein the plane shown in the figure is a display surface of the display device, an area inside a dotted line S1 is a display area (i.e., an AA area), and an area outside the dotted line S1 is a non-display area (i.e., a BM area) surrounding the display area. The touch device includes touch electrodes 210 and touch traces 220. The touch electrodes include a plurality of first touch electrodes 211 parallel to the first direction (X direction) and a plurality of second touch electrodes 212 parallel to the second direction (Y direction), and the first touch electrodes 211 and the second touch electrodes 212 are vertically overlapped. The touch electrode 210 is made of a transparent conductive material, so that the overlapping portion of the touch electrode is visible in a transparent manner in fig. 2.
The touch electrodes in this embodiment are strip electrodes, but they may also be in other shapes, such as triangle, diamond, hexagon, etc., as long as they can respectively form two electrodes crossing each other, and the adjacent positions of different electrodes can form capacitors.
As shown in fig. 3, fig. 3 is a cross-sectional view of the display device in the direction a-a of fig. 2. The substrate 100 of the display device of the present embodiment includes a display area AA and a non-display area BM surrounding the display area AA. A display device in the display apparatus is disposed in a display area AA on the substrate 100. The display device includes: a semiconductor active layer 210 formed on the substrate; a gate insulating layer 220 formed on the semiconductor active layer 210 and the substrate 100; a gate insulating layer 220 formed on the semiconductor active layer 210; a first metal layer 230 formed on the pole insulating layer 220, the first metal layer 230 including a first metal pattern 231 overlapping the semiconductor active layer 210; an interlayer insulating layer 240 formed on the first metal layer 230 and the gate insulating layer 220; a second metal layer 250 formed on the interlayer insulating layer 240, the second metal layer 250 including a second metal pattern 251 and a third metal pattern 252 spaced apart from each other; a passivation layer 260 formed on the interlayer insulating layer 240 and the second metal layer 250; a planarization layer 270 formed on the passivation layer 260; a pixel defining layer 280 formed on the planarization layer 270, and an organic light emitting diode 290 disposed on the pixel defining layer 280.
Wherein the second and third metal patterns 251 and 252 are electrically connected to the semiconductor active layer 210 through via holes in the interlayer insulating layer 240 and the gate insulating layer 220, respectively. The semiconductor active layer 210, the first metal pattern 231, the second metal pattern 251, and the third metal pattern 252 form a thin film transistor. The first metal pattern 230 is a gate electrode of the thin film transistor, and the second metal pattern 251 and the third metal pattern 252 are a source electrode and a drain electrode of the thin film transistor.
Among them, the organic light emitting diode 290 includes: an anode 291 and a cathode 293, and an organic layer 292 disposed between the anode 291 and the cathode 293. The organic layer 292 includes: an organic light emitting layer between the anode and the cathode; an electron injection layer between the organic light emitting layer and the cathode; a hole injection layer located between the organic light emitting layer and the anode; an electron transport layer between the electron injection layer and the organic light emitting layer; a hole transport layer (not shown in the internal structure of the organic layer 292) located between the hole injection layer and the organic light emitting layer. The pixel defining layer 280 has a display opening region 281 exposing the anode electrode 291. The organic layer 292 is in contact with the anode electrode 291 through the display opening region 281 of the pixel defining layer 280.
As shown in fig. 2 and 3, the passivation layer 260, the planarization layer 270, and the pixel defining layer 280 respectively include a peripheral passivation layer, a peripheral planarization layer, and a peripheral pixel defining layer extending to the non-display region BM. The display apparatus in this embodiment further includes a dam wall 300 disposed on the peripheral passivation layer of the non-display region BM. The retaining wall 300 includes a first dam 310 and a second dam 320, the first dam 310 being disposed around the display area AA, the second dam 320 being spaced apart from the first dam 310 and disposed around the first dam 310. The patterned peripheral planarization layer includes a first dam underlayer 311 and a second dam underlayer 321 formed on the peripheral passivation layer. The peripheral pixel definition layer includes a first dam middle layer 312 and a second dam middle layer 322 formed on the peripheral planarization layer after patterning. In order to enhance the blocking effect on the organic layer and the cut-off effect on the cutting cracks, a first dam upper layer 313 and a second dam upper layer 323 are correspondingly arranged on the first dam middle layer 312 and the second dam middle layer 322, the first dam upper layer 313 and the second dam upper layer 323 are patterned PS (photo spacer), and the PS can be made of materials such as melamine resin and polystyrene resin. Of course, the retaining wall of the invention is not limited to two weirs, and retaining walls containing any number of weirs can be designed according to requirements. It should be noted that the dam of the present invention is not limited to a three-layer stacked structure formed by the patterned peripheral passivation layer, the peripheral planarization layer and the PS, and the number of layers constituting the dam may be changed as needed, for example, the dam may be formed by only the patterned PS.
The thin film encapsulation layer 500 covers the display device in the display area AA. The thin film encapsulation layer 500 includes a first inorganic layer 510, a second inorganic layer 530, and a thin film encapsulation organic layer 520 sandwiched between the two inorganic layers. The film encapsulation layer 500 covers the first dam 310 and is located in an area surrounded by the second dam 320. The thin film encapsulation organic layer 520 is positioned in the area surrounded by the first dam 310 to prevent the overflow of the organic material.
In this embodiment, a three-layer thin film encapsulation structure with inorganic layers sandwiched between organic layers is adopted, however, in other embodiments, the structure of the thin film encapsulation layer is not limited thereto, and the thin film encapsulation layer may be designed to be a laminated structure with any number of layers as required, but at least includes one organic layer and at least one inorganic layer deposited alternately, and the lowermost layer and the uppermost layer are made of inorganic materials.
The touch trace 220 includes a first portion of trace 221 and a second portion of trace 222 connected between the first portion of trace 221 and the first touch electrode 211. The first part of the trace lines 221 are routed along a direction parallel to the Y direction, are disposed in the same layer as the second metal layer 250, and are formed on the peripheral interlayer insulating layer of the interlayer insulating layer 240 extending to the non-display area BM. That is to say, the pattern of the first part of the trace is designed on the Mask corresponding to the second metal layer, and the patterned second metal layer includes the first part of the trace of the touch trace. Therefore, when the touch electrodes and the touch routing lines are arranged in a layered mode, the number of film layers of the display panel cannot be increased, the touch routing line part and the second metal layer share one Mask, the number of masks cannot be increased, and the process is avoided being complex.
The second portion of the trace 222 is connected to the first touch electrode 211 through the touch trace via 261 on the passivation layer 260. The touch trace via 261 is disposed in a peripheral area of the second dam 320, that is, along a direction perpendicular to the substrate, a projection of the touch trace via 261 on the substrate 100 is located at a side of the projection of the second dam 320 on the substrate 100, which is far away from the display area AA. The touch wiring via hole is arranged on one side of the periphery of the outermost side dam, so that the thin film packaging layer is prevented from being perforated, and the water and oxygen blocking performance of the thin film packaging layer is prevented from being damaged by the perforated hole
As shown in fig. 2 and fig. 3, the shielding electrode 400 is disposed in the non-display area BM and is insulated and covered on the first portion of the trace 221 of the first touch electrode 211, that is, along a direction perpendicular to the substrate, a projection of the first portion of the trace 221 on the substrate overlaps a projection of the shielding electrode 400 on the substrate.
The shielding electrode 400 and the first touch electrode 211 are disposed on the same layer and are insulated from each other. That is, the shielding electrode and the first touch electrode may be formed of the same conductive film layer, and the shielding electrode and the first touch electrode share a Mask, and after patterning, the shielding electrode pattern and the first touch electrode pattern that are disconnected from each other are formed. Therefore, when a layer of shielding electrode is added, the number of film layers of the system is not increased, the number of masks is not increased, and the increase of process difficulty is avoided.
Preferably, the first touch electrode in this embodiment is a touch sensing electrode, and the second touch electrode is a touch driving electrode. The touch driving electrodes are connected to a touch driving signal, which is generally a given voltage input signal, and the touch sensing electrodes are connected to an output signal, which is relatively easily affected by an external voltage. However, the present invention is not limited thereto, and the shielding electrode may be disposed on both the touch sensing electrode and the touch driving electrode according to the requirement.
Preferably, the present embodiment is a double-layer touch electrode structure in which the first touch electrode and the second touch electrode are layered through an insulating layer, and the shielding electrode and the first touch electrode are disposed on the same layer. In contrast, the shielding electrode may be disposed on the same layer as the second touch electrode as needed. In contrast, the first touch electrode and the second touch electrode may be disposed on the same layer, that is, the touch part is a single-layer touch electrode structure, wherein an overlapping portion of the first touch electrode and the second touch electrode is overlapped by a bridge-crossing insulation, and the shielding electrode and the first touch electrode are on the same layer as the second touch electrode. The shielding electrode and the touch electrode are on the same layer and can be manufactured together with the touch electrode, and share the same Mask, namely the number of film layers of the display device is not increased, and the number of masks in the process is not increased.
The shielding electrode 400 is electrically connected to a fixed potential. The shielding electrode obtains a fixed voltage, and when any object with electric charges contacts or is close to the shielding electrode, the voltage of the shielding electrode cannot be changed, so that the touch wiring under the shielding electrode is in a condition without external interference, and cannot be changed due to the touch of fingers or other interference sources, and therefore the touch electrode corresponding to the touch wiring cannot respond due to the fact that the fingers touch the edge of the display area by mistake, the occurrence of error reporting points is avoided, and the touch precision is improved.
Preferably, the pattern of the touch electrode 400 is a plurality of strip electrodes parallel to the Y direction, that is, a plurality of slits parallel to the Y direction are etched on the whole shielding electrode, and along the direction perpendicular to the substrate, the projection of the slits on the substrate does not overlap with the projection of the touch trace on the substrate. The display device can be applied to a flexible display device, when the flexible display device is excessively bent, the shielding electrode generates cracks, the cracks are easy to extend in the subsequent bending process, finally, the whole shielding electrode is broken, the failure of the shielding electrode is caused, the gaps between the adjacent strip-shaped electrode shielding electrodes can effectively block the propagation of the cracks, the failure of a device caused by bending is prevented, and the bending reliability of the display device is improved.
Preferably, in this embodiment, the touch trace of the first touch electrode is divided into two portions, namely a left wiring portion and a right wiring portion, so as to reduce the frame of the display device. The touch-control wires of the first touch-control electrodes positioned on the upper half part of the display device are uniformly distributed on the left side of the display device, and the touch-control wires of the first touch-control electrodes positioned on the lower half part of the display device are uniformly distributed on the right side of the display device, so that the coverage area of the shielding electrodes can be reduced, the process is simplified, the materials are saved, and the cost is reduced. Of course, the invention is not limited thereto, and the routing of the first touch electrodes may be set as uniform routing of the interlaced first touch electrodes from one side of the display area.
As shown in fig. 4, fig. 4 is a schematic plan view of another touch-integrated organic light emitting diode display device provided in the present invention, wherein the plane shown in the drawing is a display surface of the display device. The area inside the dotted line S1 is a display area (i.e., an AA area), and the area outside the dotted line S1 is a non-display area (i.e., a BM area) surrounding the display area, and the touch device includes the touch electrode 210 and the touch trace 220. The touch electrode 210 includes a plurality of first touch electrodes 211 parallel to the first direction (X direction) and a plurality of second touch electrodes 212 parallel to the second direction (Y direction), and the first touch electrodes 211 and the second touch electrodes 212 are vertically overlapped.
Fig. 5 is a cross-sectional view of the display device of fig. 4 taken along the direction B-B, as shown in fig. 5. The same parts of this embodiment as the previous embodiment are not described in detail.
The touch trace 220 includes a first portion of trace 221 and a second portion of trace 222 connected between the first portion of trace 221 and the first touch electrode 211. The first portion of traces 221 and the second metal layer 250 are disposed on the same layer and formed on the peripheral interlayer insulating layer extending from the interlayer insulating layer 240 to the non-display area BM. That is to say, the pattern of the first part of the trace is designed on the Mask corresponding to the second metal layer, and the patterned second metal layer includes the first part of the trace of the touch trace. Therefore, when the touch electrodes and the touch routing lines are arranged in a layered mode, the number of film layers of the display panel cannot be increased, the touch routing line part and the second metal layer share one Mask, the number of masks cannot be increased, and the process is avoided being complex.
The first portion of the trace 221 includes a plurality of trace portions parallel to the Y direction, and the trace portions are located on the passivation layer 260 corresponding to the space between the first dam 310 and the second dam 320, that is, along the direction perpendicular to the substrate, the projection of the first portion of the trace 221 on the substrate 100 is located in the area between the projections of the first dam 310 and the second dam 320 on the substrate 100. One end of the second part of the trace 222 is connected to the first part of the trace 221 through the touch trace via 261 on the passivation layer 260, and the other end is connected to the first touch electrode 211; the touch trace via 261 is disposed in a peripheral area of the second dam, that is, along a direction perpendicular to the substrate, a projection of the touch trace via 261 on the substrate 100 is located at a side of the projection of the second dam 320 on the substrate 100, which is far away from the display area AA. The touch wiring via hole is arranged on one side of the periphery of the outermost side dam, so that a hole is prevented from being formed in the thin film packaging layer, and the water and oxygen blocking performance of the thin film packaging layer is prevented from being damaged. By changing the layer of the touch wiring, the wiring space of the touch wiring after the layer is changed is more sufficient, the touch wiring is close to the display area, and the narrow frame design of the display device is realized.
As shown in fig. 4 and 5, the shielding electrode 400 is disposed in the non-display area BM and is insulated and covered on the second portion of the trace 222 of the first touch electrode 211, that is, along a direction perpendicular to the substrate, a projection of the second portion of the trace 222 on the substrate overlaps a projection of the shielding electrode 400 on the substrate. The shielding electrode 400 and the first touch electrode 211 are disposed on the same layer and are insulated from each other. That is, the shielding electrode and the first touch electrode may be formed of the same conductive film layer, and the shielding electrode and the first touch electrode share a Mask, and after patterning, the shielding electrode pattern and the first touch electrode pattern that are disconnected from each other are formed. Therefore, when a layer of shielding electrode is added, the number of film layers of the system is not increased, the number of masks is not increased, and the increase of process difficulty is avoided.
The shielding electrode 400 is electrically connected to a fixed potential. The shielding electrode obtains a fixed voltage, and when any object with electric charges contacts or is close to the shielding electrode, the voltage of the shielding electrode cannot be changed, so that the touch wiring under the shielding electrode is in a condition without external interference, and cannot be changed due to the touch of fingers or other interference sources, and therefore the touch electrode corresponding to the touch wiring cannot respond due to the fact that the fingers touch the edge of the display area by mistake, the occurrence of error reporting points is avoided, and the touch precision is improved.
As shown in fig. 6, fig. 6 is a cross-sectional view of another touch-integrated organic light emitting diode display device provided in the present invention, a plan view of the display device of the present embodiment is shown in fig. 4, and fig. 6 is a cross-section along a direction B-B in fig. 4, wherein the same parts of the present embodiment as those of the previous embodiment are not repeated.
In contrast, the gate insulating layer 220 includes a peripheral gate insulating layer extending to the non-display region BM. The touch trace 220 includes a first portion of trace 223 and a second portion of trace 224 connected between the first portion of trace 223 and the first touch electrode 211. The first part of trace 223 and the first metal layer 230 are disposed on the same layer and formed simultaneously with the gate of the tft, that is, a pattern of the first part of trace is designed simultaneously on the Mask corresponding to the first metal layer, and the patterned first metal layer includes the first part of trace of the touch trace. Therefore, when the touch electrodes and the touch routing lines are arranged in a layered mode, the number of film layers of the display panel cannot be increased, the touch routing line part and the first metal layer share one Mask, the number of masks cannot be increased, and the process is avoided being complex.
The first portion of the trace 221 includes a plurality of trace portions parallel to the Y direction, and the trace portions are located on the gate insulating layer 220 corresponding to the space between the first dam 310 and the second dam 320, that is, along the direction perpendicular to the substrate, the projection of the first portion of the trace 221 on the substrate 100 is located in the area between the projections of the first dam 310 and the second dam 320 on the substrate 100. One end of the second part of the trace 222 is connected to the first part of the trace 221 through the passivation layer 260 and the touch trace via 261 on the interlayer insulating layer 240, and the other end is connected to the first touch electrode 211; the touch trace via 261 is disposed in a peripheral area of the second dam, that is, along a direction perpendicular to the substrate, a projection of the touch trace via 261 on the substrate 100 is located at a side of the projection of the second dam 320 on the substrate 100, which is far away from the display area AA.
In the present embodiment, the shielding electrode 400 and the first touch electrode 211 are disposed on the same layer and are insulated from each other. That is, the shielding electrode and the first touch electrode may be formed of the same conductive film layer, and the shielding electrode and the first touch electrode share a Mask, and after patterning, the shielding electrode pattern and the first touch electrode pattern that are disconnected from each other are formed. Therefore, when a layer of shielding electrode is added, the number of film layers of the system is not increased, the number of masks is not increased, and the increase of process difficulty is avoided.
The shielding electrode 400 is connected to the ground line to obtain a fixed potential, so as to shield the interference of an external interference source to the touch trace under the shielding electrode, so that the touch trace does not respond to the change of the external voltage, and the touch precision is improved.
In the embodiment, the shielding electrode and the first touch electrode are disposed on the same layer, and different from the shielding electrode, the shielding electrode and the second metal layer may also be disposed on the same layer. The shielding electrode can be formed together with the source electrode and the drain electrode of the thin film transistor, that is, the pattern of the shielding electrode is designed on the Mask corresponding to the second metal layer at the same time, so that the patterned second metal layer comprises the shielding electrode, thus the number of film layers of the display panel can not be increased, the number of masks can not be increased, and the process is avoided to be complicated.
As shown in fig. 7, fig. 7 is a schematic plan view of another integrated touch-control organic light emitting diode display device provided in the present invention, wherein the plane shown in the drawing is a display surface of the display device. The area inside the dotted line S1 is a display area (i.e., an AA area), and the area outside the dotted line S1 is a non-display area (i.e., a BM area) surrounding the display area, and the touch device includes the touch electrode 210 and the touch trace 220. The touch electrode 210 includes a plurality of first touch electrodes 211 parallel to the first direction (X direction) and a plurality of second touch electrodes 212 parallel to the second direction (Y direction), and the first touch electrodes 211 and the second touch electrodes 212 are vertically overlapped.
As shown in fig. 8 and 9, fig. 8 is a cross-sectional view of the display device along a direction C-C in fig. 7, and fig. 9 is a cross-sectional view of the display device along a direction D-D in fig. 7, wherein the same points of the present embodiment as those of the previous embodiment are not repeated.
The touch trace 220 includes a first portion of trace 221 and a second portion of trace 222 connected between the first portion of trace 221 and the first touch electrode 211. The first portion of traces 221 and the second metal layer 250 are disposed on the same layer and formed on the peripheral interlayer insulating layer extending from the interlayer insulating layer 240 to the non-display area BM. The first portion of the trace 221 includes a plurality of trace portions parallel to the Y direction, and the trace portions are located on the passivation layer 260 corresponding to the space between the first dam 310 and the second dam 320, that is, along the direction perpendicular to the substrate, the projection of the first portion of the trace 221 on the substrate 100 is located in the area between the projections of the first dam 310 and the second dam 320 on the substrate 100. One end of the second part of the trace 222 is connected to the first part of the trace 221 through the touch trace via 261 on the passivation layer 260, and the other end is connected to the first touch electrode 211; the touch trace via 261 is disposed in a peripheral area of the second dam, that is, along a direction perpendicular to the substrate, a projection of the touch trace via 261 on the substrate 100 is located at a side of the projection of the second dam 320 on the substrate 100, which is far away from the display area AA.
The planarization layer 270 includes a peripheral planarization layer extending to the non-display area BM, the patterned peripheral planarization layer includes a first dam bottom layer 311 and a second dam bottom layer 321 formed on the peripheral passivation layer, and further includes a first planarization layer pattern 271 formed between the first dam 310 and the second dam 320, the first planarization layer pattern 271 corresponds to the pattern of the first portion of the routing lines 221 under the passivation layer 260, that is, in the direction perpendicular to the substrate, the projection of the second portion of the routing lines 222 on the substrate overlaps the projection of the first planarization layer pattern 271 on the substrate.
The shielding electrode 400 is disposed in the non-display area BM and covers the second portion of the trace 222 of the first touch electrode 211 in an insulating manner, and the shielding electrode 400 is electrically connected to a fixed potential. The shielding electrode obtains a fixed voltage, and when any object with charges contacts or is close to the shielding electrode, the voltage of the shielding electrode cannot be changed, so that the interference of external voltage change on the touch wiring is shielded; by adding the planarization layer between the shielding electrode and the second part of wiring, the load between the second part of wiring and the shielding electrode is greatly reduced under the condition that a new film layer is not added.
However, the invention is not limited to only using the planarization layer as the insulating film between the shielding electrode and the second portion of the trace, and in contrast, the invention can also use the pixel defining layer in the patterned peripheral region as the insulating film between the shielding electrode and the second portion of the trace.
Preferably, the first planarization layer pattern 271 has a plurality of stripe patterns parallel to the Y direction and spaced apart from each other. The first planarization layer pattern 271 in a stripe shape is located between the first dam 310 and the second dam 320, but is spaced apart from the two dams. The thin film encapsulation layer 500 is in contact with the passivation layer under the planarization layer through the spaces, preventing the film layers from being separated, and enhancing the water and oxygen blocking performance of the encapsulation layer.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. An integrated touch organic light emitting diode display device, comprising:
a substrate including a display area and a non-display area surrounding the display area;
a display device disposed in the display area on the substrate, including a first metal layer and a second metal layer;
a thin film encapsulation layer covering the display device of the display area;
the touch device comprises a touch electrode and a touch wire connected with the touch electrode; the touch electrode is arranged on the surface of one side, far away from the display device, of the thin film packaging layer of the display area; at least part of the touch routing is arranged in the non-display area and is arranged on the same layer as the first metal layer or the second metal layer;
the shielding electrode is insulated from the touch-control routing wire, and at least part of projection of the shielding electrode on the substrate is overlapped with projection of the touch-control routing wire on the substrate along the direction vertical to the substrate;
the shielding electrode is electrically connected to a fixed potential;
the shielding electrode and the touch electrode are arranged on the same layer and in an insulating manner;
the display device also comprises a retaining wall arranged in the non-display area; the retaining wall comprises a first dam and a second dam, the first dam is arranged around the display area, and the second dam is separated from the first dam and surrounds the first dam; the touch wire is positioned on one side of the thin film packaging layer, which is far away from the touch electrode;
the thin film packaging layer comprises inorganic layers and organic layers which are alternately arranged, and the film layer nearest to the substrate and the film layer farthest from the substrate in the thin film packaging layer are both inorganic layers; the inorganic layer covers the first dam and is positioned in an area surrounded by the second dam; the organic layer covers the area surrounded by the first dam;
the touch routing comprises a first part of routing, a second part of routing connecting the first part of routing and the touch electrode, a passivation layer and a planarization layer, wherein the passivation layer is arranged on one side of the second metal layer, which is far away from the substrate, and the planarization layer is arranged on one side of the passivation layer, which is far away from the substrate; the planarization layer comprises a first planarization layer pattern, the first planarization layer pattern is formed between the first dam and the second dam, and the projection of the first part of the routing wires on the substrate is overlapped with the projection of the first planarization layer pattern on the substrate; at least part of the first dam, at least part of the second dam and the first planarization layer pattern are arranged in the same layer, the first planarization layer pattern is spaced from the first dam and the second dam, and the thin film encapsulation layer is in contact with the passivation layer below the planarization layer through the space.
2. The organic light emitting diode display apparatus of claim 1, wherein the display device further comprises:
a semiconductor active layer formed on the substrate;
a gate insulating layer formed on the semiconductor active layer and the substrate;
the first metal layer is formed on the grid electrode insulating layer and comprises a first metal pattern for forming a grid electrode;
an interlayer insulating layer formed on the first metal layer and the gate insulating layer;
the second metal layer is arranged on the interlayer insulating layer and comprises a second metal pattern for forming a source electrode and a third metal pattern for forming a drain electrode;
the passivation layer is further formed on the interlayer insulating layer;
the planarization layer comprises a peripheral planarization layer located in the non-display region;
the pixel definition layer is formed on the planarization layer and comprises a peripheral pixel definition layer positioned in the non-display area;
and the organic light emitting diode is correspondingly arranged on the display opening area on the pixel defining layer.
3. The oled display device claimed in claim 1, wherein the second portion of the traces are connected to the touch electrodes through vias; along the direction vertical to the substrate, the projection of the via hole on the substrate is positioned on the side, away from the display area, of the projection of the second dam on the substrate.
4. The OLED display device as claimed in claim 3, wherein at least a portion of the first portion of traces is projected on the substrate between the first dam and the second dam in a direction perpendicular to the substrate.
5. The oled display device claimed in claim 2, wherein at least a portion of the peripheral planarization layer or the peripheral pixel definition layer is disposed between the first dam and the second dam corresponding to the pattern of the first portion of the traces.
6. The oled display device claimed in claim 1, wherein the shielding electrode is a grid electrode corresponding to the touch trace pattern, and the grid electrode includes a plurality of strip electrodes parallel to the touch traces.
7. The organic light emitting diode display device of claim 1, wherein the shielding electrode is connected to a ground line.
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| CN201710096217.0A CN106803514B (en) | 2017-02-22 | 2017-02-22 | Touch-control integrated organic light-emitting diode display device |
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| CN201710096217.0A CN106803514B (en) | 2017-02-22 | 2017-02-22 | Touch-control integrated organic light-emitting diode display device |
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| CN106803514B true CN106803514B (en) | 2020-06-30 |
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| CN106803514A (en) | 2017-06-06 |
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