CN112992996B - Display panel and display device - Google Patents
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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
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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- Engineering & Computer Science (AREA)
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- Theoretical Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses display panel and display device, display panel is provided with the drive base plate, includes: the organic light-emitting diode, the packaging layer, the light-filtering shielding layer, the first insulating layer and the first touch electrode layer; the organic light emitting diode, the packaging layer, the light filtering shielding layer, the first insulating layer and the first touch electrode layer are sequentially arranged on the driving side of the driving substrate; the optical filtering shielding layer is used for electrically connecting constant potential and comprises a plurality of hollowed-out areas; the first touch electrode layer comprises a plurality of touch electrode leads; and the orthographic projection part of the hollowed-out area on the driving substrate covers orthographic projection of the touch electrode lead on the driving substrate. The problem that the parasitic capacitance generated by the built-in touch electrode produces noise interference on a touch signal and further reduces the touch performance can be solved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
At present, the touch panel is usually designed in an externally hung manner, that is, the touch panel and the display panel are manufactured separately and then attached together through full lamination. However, the external touch panel increases the overall thickness of the organic light emitting display module. Along with the development of technology, the touch function is set in the display panel, which has become a research direction for thinning the display module.
However, in general, the touch function is realized by a touch electrode, the touch electrode is disposed in the display panel, capacitive coupling is generated between the touch electrode and a driving wire or a driving electrode in the display panel, and parasitic capacitance is generated on the touch electrode, and noise interference is generated on a touch signal due to the parasitic capacitance, so that the touch sensitivity is reduced.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, which can improve the problem that parasitic capacitance generated by the built-in touch electrode produces noise interference on a touch signal, so that the touch sensitivity is reduced.
In a first aspect, a display panel provided with a driving substrate includes: the organic light-emitting diode, the packaging layer, the light-filtering shielding layer, the first insulating layer and the first touch electrode layer;
the organic light emitting diode, the packaging layer, the light filtering shielding layer, the first insulating layer and the first touch electrode layer are sequentially arranged on the driving side of the driving substrate;
the optical filtering shielding layer is used for electrically connecting constant potential and comprises a plurality of hollowed-out areas;
the first touch electrode layer comprises a plurality of touch electrode leads;
and the orthographic projection part of the hollowed-out area on the driving substrate covers orthographic projection of the touch electrode lead on the driving substrate.
In a possible implementation manner, the touch panel further comprises a light shielding layer, wherein the light shielding layer is arranged on one side of the first touch electrode layer away from the first insulating layer;
the shading layer comprises a shading pattern and a shading opening area, and the shading opening area is used for enabling light rays emitted by the organic light-emitting diode to be transmitted;
the filter shielding layer comprises a plurality of filter areas, and the orthographic projection of the filter areas on the driving substrate covers the orthographic projection of the shading opening areas on the driving substrate.
In a possible embodiment, the orthographic projection of the shading pattern on the driving substrate covers a target projection, wherein the target projection is the orthographic projection of the hollowed-out area on the driving substrate and the orthographic projection of the touch electrode lead on the driving substrate.
In a possible embodiment, the method further includes: the second touch electrode layer is arranged between the first touch electrode layer and the shading layer, and a second insulating layer is arranged between the first touch electrode layer and the second touch electrode layer;
the second touch electrode layer comprises a plurality of touch electrode blocks, a plurality of through holes are formed in the second insulating layer, and the touch electrode leads are electrically connected with the touch electrode blocks through the through holes.
In a possible embodiment, the method further includes: the second touch electrode layer is arranged between the first touch electrode layer and the shading layer, and a second insulating layer is arranged between the first touch electrode layer and the second touch electrode layer;
the second touch electrode layer comprises a plurality of touch electrodes, and the touch electrode leads and the touch electrodes are intersected to define a touch sensing area.
In one possible embodiment, the filter-shielding layer comprises sub-wavelength periodic nanostructures.
In one possible embodiment, the sub-wavelength periodic nanostructure comprises a one-dimensional grating periodic structure or a two-dimensional grating periodic structure.
In a possible embodiment, the thickness of the filter-shielding layer ranges from 10nm to 100nm.
In a possible embodiment, the filter-shielding layer further comprises a ground lead, and the filter-shielding layer is electrically connected with the ground lead.
In a second aspect, a display device includes: a display panel according to any one of the preceding claims.
According to the display panel and the display device, the filter shielding layer is arranged between the organic light emitting diode and the first touch electrode layer, and the filter shielding layer can be used for shielding display noise generated by the electrode of the organic light emitting diode through electric connection with constant electric potential, so that the interference of the display noise on the touch electrode lead on the first touch electrode layer can be reduced or avoided. Specifically, the potential on the electrode of the organic light emitting diode changes (voltage jumps), and the capacitance on the filter shielding layer changes less due to the constant potential being connected, so that parasitic capacitance on the touch electrode lead positioned on the upper side of the filter shielding layer can be reduced, and noise coupling is reduced. In addition, due to the arrangement of the hollowed-out area, the area of the filter shielding layer on the lead opposite to the touch electrode is reduced, RC loading (resistance capacitance loading) on the filter shielding layer can be reduced, the shielding effect of the filter shielding layer is further enhanced, parasitic capacitance generated by the electrode of the organic light emitting diode and the first touch electrode layer is further reduced, noise coupling is reduced, display noise interference is reduced, and touch sensitivity is improved.
Drawings
Fig. 1 is a schematic partial structure of a display panel according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a partial structure of a display panel along A-A' according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of a display panel partial structure along line C-C' according to an embodiment of the present application;
FIG. 4 is another cross-sectional view of a display panel partial structure along line C-C' according to an embodiment of the present application;
fig. 5 is a schematic partial structure of a light shielding layer of a display panel according to an embodiment of the present disclosure;
fig. 6 is a schematic partial structure diagram of a filter-shielding layer of a display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic partial structure of another display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
FIG. 9 is a cross-sectional view of a structure of a further display panel along D-D' according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of still another display panel according to an embodiment of the present disclosure;
FIG. 11 is a schematic view of a partial structure of another display panel according to an embodiment of the disclosure;
FIG. 12 is a cross-sectional view of a portion of a display panel along E-E' according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes two or more cases.
At present, the touch electrode is disposed in the display panel, and capacitive coupling is generated between the touch electrode and a driving wire or a driving electrode in the display panel, so that parasitic capacitance is generated on the touch electrode, and noise interference is generated on a touch signal due to the existence of the parasitic capacitance, so that the touch sensitivity is reduced.
In view of the above, in order to solve the above problems, an embodiment of the present application provides a display panel, and fig. 1 is a schematic partial structure of the display panel according to the embodiment of the present application; FIG. 2 is a cross-sectional view of a partial structure of a display panel along A-A' according to an embodiment of the present application; fig. 3 is a cross-sectional view of a display panel partial structure along C-C' according to an embodiment of the present application. Referring to fig. 1 to 3, a display panel provided with a driving substrate 100 includes: the organic light emitting diode 200, the encapsulation layer 300, the filter-shielding layer 400, the first insulating layer 500, and the first touch electrode layer 600; the organic light emitting diode 200, the encapsulation layer 300, the filter shielding layer 400, the first insulating layer 500, and the first touch electrode layer 600 are sequentially disposed on the driving side of the driving substrate 100. The filter-shielding layer 400 may be used for electrically connecting to a constant potential, and the filter-shielding layer 400 may include a plurality of hollowed-out areas 420; the first touch electrode layer 600 includes a plurality of touch electrode leads 610; the front projection portion of the hollowed-out area 420 on the driving substrate 100 covers the front projection of the touch electrode lead 610 on the driving substrate 100. The hollowed-out area 420 is designed by making a hollowed-out pattern on the filter-shielding layer 400, so that the whole surface of the filter-shielding layer 400 can be ensured to be electrically conducted while the coverage area of the filter-shielding layer 400 is reduced. As illustrated in fig. 1, the organic light emitting diode 200 may include a red organic light emitting diode R, a green organic light emitting diode G, and a blue organic light emitting diode B, for example.
Illustratively, the hollowed-out region 420 may be obtained by a mask plate and an etching process, which is not specifically limited in this application. The number, size and arrangement of the hollowed-out areas 420 shown in fig. 1 are only schematic, the wiring manner of the touch electrode leads 610 is also only schematic, and the arrangement manner and area size of the red organic light emitting diode R, the green organic light emitting diode G and the blue organic light emitting diode B are also only schematic, which are not specific limitations of the present application.
In the display panel provided by the embodiment of the application, the filter shielding layer 400 is disposed between the organic light emitting diode 200 and the first touch electrode layer 600, and the filter shielding layer 400 can realize shielding of display noise generated by the electrode of the organic light emitting diode 200 by electrically connecting with a constant electric potential, so that the interference of the display noise on the touch electrode lead 610 on the first touch electrode layer 600 can be reduced or avoided. Specifically, the potential on the electrode of the organic light emitting diode 200 changes (voltage jumps), and the capacitance on the filter-shielding layer 400 changes less due to the constant potential being applied, so that the parasitic capacitance on the touch electrode lead 610 on the upper side of the filter-shielding layer 400 can be reduced, thereby reducing noise coupling. In addition, due to the arrangement of the hollowed-out area 420, the area of the filter shielding layer 400 on the lead 610 opposite to the touch electrode is reduced, so that RC loading (resistance capacitance load) on the filter shielding layer 400 can be reduced, the shielding effect of the filter shielding layer 400 is further enhanced, parasitic capacitance generated by the electrode of the organic light emitting diode 200 and the first touch electrode layer 600 is further reduced, noise coupling is reduced, display noise interference is reduced, and touch sensitivity is improved.
In one possible implementation, fig. 4 is another cross-sectional view along C-C' of a display panel partial structure provided in an embodiment of the present application; fig. 5 is a schematic partial structure of a light shielding layer of a display panel according to an embodiment of the present disclosure; fig. 6 is a schematic partial structure diagram of a filter shielding layer of a display panel according to an embodiment of the present application. As shown in fig. 4, the display panel may further include a light shielding layer 700, where the light shielding layer 700 is disposed on a side of the first touch electrode layer 600 away from the first insulating layer 500. As shown in fig. 5, the light shielding layer 700 may include a light shielding pattern 710 and a light shielding opening region 720, the light shielding opening region 720 being for allowing light emitted from the organic light emitting diode 200 to pass through. As shown in fig. 6, the filter-shielding layer 400 may further include a plurality of filter regions 410, and an orthographic projection of the filter regions 410 on the driving substrate 100 covers an orthographic projection of the light-shielding opening regions 720 on the driving substrate 100. Referring to fig. 1 and 5, each of the organic light emitting diodes 200 may be used as a sub-pixel, and one of the light shielding opening regions 720 may correspond to one of the organic light emitting diodes 200, and the light shielding opening region 720 is used to transmit light emitted from the sub-pixel. The kinds of the organic light emitting diodes 200 may be set according to different color mixing schemes, as shown in fig. 2, and the organic light emitting diodes 200 may include red organic light emitting diodes R, green organic light emitting diodes G, and blue organic light emitting diodes B, for example, by way of example, a red, green, and blue color mixing scheme. The colors of the lights emitted by the different organic light emitting diodes 200 are different, and the red organic light emitting diode R, the green organic light emitting diode G and the blue organic light emitting diode correspondingly emit red, green and blue lights, respectively.
In addition, fig. 4 only shows a basic film layer structure of the display panel, and the display panel may further include other film layers, which is not specifically limited in this application.
According to the display panel provided by the embodiment of the application, the filtering area 410 is arranged on the filtering and shielding layer 400, the filtering area 410 corresponds to the light emitting diode 200 and the shading opening area 720 respectively, the filtering and shielding layer 400 can play a role in filtering, a color filtering film or an externally hung polaroid can be replaced, light rays emitted by the organic light emitting diode 200 are filtered, and the effect of reducing the external light rays of the display panel is achieved.
In a possible implementation manner, with continued reference to fig. 4, the display panel provided in the embodiment of the present application is provided with a driving substrate 100, including: the organic light emitting diode 200, the encapsulation layer 300, the filter shielding layer 400, the first insulating layer 500, the first touch electrode layer 600, the light shielding layer 700, and the planarization layer 800 are sequentially disposed at the driving side of the driving substrate 100. The driving substrate 100 is provided with a plurality of driving devices, which are generally thin film transistors TFT, and a side of the driving substrate 100 on which the driving devices are provided may be referred to as a driving side. The driving side of the organic light emitting diode 200 of the driving substrate 100 may be used to electrically connect a driving device, which may drive self-luminescence of the organic light emitting diode 200.
Specifically, as shown in fig. 4, the organic light emitting diode 200 may include a first electrode 210, a light emitting layer 220, and a second electrode 230, the first electrode 210 may be used to electrically connect a driving device, the light emitting layer 220 is used to emit light under the action of the first electrode 210 and the second electrode 230, and the second electrode 230 may be a full-face electrode. For example, the first electrode 210 may serve as an anode of the organic light emitting diode 200, and the second electrode 230 may serve as a cathode of the organic light emitting diode 200. The encapsulation layer 300 may be used to encapsulate the organic light emitting diode 200, and serves to protect the organic light emitting diode 200. The filter-shielding layer 400 is disposed between the organic light emitting diode 200 and the first touch electrode layer 600, and may function as a shield. When the voltage jumps, the second electrode 230 of the organic light emitting diode 200 or the electrode of the driving device generates parasitic capacitance with the first touch electrode layer 600, which causes noise coupling and display noise interference to the touch signal. The arrangement of the optical filtering shielding layer 400 can reduce parasitic capacitance generated by the second electrode 230 and the first touch electrode layer 600, and can play a role of shielding noise, thereby weakening display noise interference and improving touch sensitivity. The first insulating layer 500 may serve as an insulation for the filter-shielding layer 400 and the first touch electrode layer 600. As shown in fig. 2, the organic light emitting diode 200 may be disposed within a pixel region defined by the pixel defining layer 201.
As shown in fig. 6, the filter-shielding layer 400 includes a plurality of filter regions 410, and the front projection of the filter regions 410 on the driving substrate 100 covers the front projection of the light-shielding opening region 720 on the driving substrate 100, where the covering may be a partial covering or a full covering. Several hollow areas 420 can enclose into a sub-pixel area, and an organic light emitting diode 200 can be placed in each sub-pixel area, and specific several hollow areas 420 enclose into a sub-pixel area and can be adaptively set according to specific pixel designs and hollow area 420 designs, which is not particularly limited in this application. The light filtering region 410 filters the light emitted from the organic light emitting diode 200, and the filtered light is transmitted through the light shielding opening region 720. Taking the red organic light emitting diode R, the green organic light emitting diode G and the blue organic light emitting diode as examples, the red light, the green light and the blue light can be obtained after the light is filtered by the light filtering areas 410 corresponding to the red organic light emitting diode R, the green organic light emitting diode G and the blue organic light emitting diode, and the light filtering shielding layer 400 can replace a color light filtering film or an externally hung polarizer to filter the light emitted by the organic light emitting diode 200, so as to play a role in reducing and reacting to the external light of the display panel.
According to the display panel provided by the embodiment of the application, the filter shielding layer 400 is arranged between the organic light emitting diode 200 and the first touch electrode layer 600, so that the display signal of the electrode of the organic light emitting diode 200 can be shielded, the parasitic capacitance generated by the electrode of the organic light emitting diode 200 and the first touch electrode layer 600 is further reduced, the display noise interference can be weakened, and the touch sensitivity is improved. Meanwhile, the filter shielding layer 400 can perform a filtering function, and can replace a color filter film or an externally hung polarizer to filter light emitted by the organic light emitting diode 200, thereby performing a reactive function on external light of the display panel.
In one possible implementation, the filter-shielding layer 400 mentioned in the above embodiment may realize shielding of the display signal of the organic light emitting diode 200 by electrically connecting a constant potential.
In the display panel provided by the embodiment of the application, the filter shielding layer 400 is electrically connected to a constant potential, and even if the potential on the electrode of the organic light emitting diode 200 located at the lower side of the filter shielding layer 400 changes (voltage jumps), the capacitance between the electrode and the filter shielding layer changes, the first touch electrode layer 600 located at the upper side of the filter shielding layer 400 is not greatly affected and the capacitance fluctuates greatly, and the filter shielding layer 400 can play a role of shielding the display signal of the electrode of the organic light emitting diode 200, so that parasitic capacitance generated by the electrode of the organic light emitting diode 200 and the first touch electrode layer 600 is reduced, display noise interference can be weakened, and touch sensitivity is improved.
In one possible embodiment, the display panel may further include a ground lead, and the filter-shielding layer 400 is electrically connected to the ground lead. The ground lead may be a GND line on the display panel, and the ground is also one of constant potentials, which may be realized by the ground.
The display panel that this embodiment provided realizes that filter screen layer 400 inserts invariable potential through being connected filter screen layer 400 and ground lead electricity, plays the effect of shielding, can utilize the existing ground lead on the display panel, need not to set up other wiring, utilizes current wiring, and is simple convenient.
In one possible embodiment, the filter-mask layer 400 includes sub-wavelength periodic nanostructures. The filter shielding layer 400 may be made of a metal material, and may utilize a surface plasmon resonance excitation principle of a metal nano periodic structure, and selectively transmit light waves with a certain wavelength and a certain bandwidth in a visible light band through the metal nano structures with different periods and sizes, so as to generate spectrums with different colors such as red, green, blue, and the like, that is, the spectrums with different colors such as red, green, blue, and the like are generated by adjusting the periodic structure and matching with light emitted by the organic light emitting diode 200, wherein the periodic structure capable of exciting one color may correspond to one organic light emitting diode 200. The spectrum of different colors of red, green, blue and the like is merely illustrative based on the principle of color mixing of red, green, blue display, and the like, and the red organic light emitting diode, the green organic light emitting diode and the blue organic light emitting diode are also required to be matched. At this time, the filter shielding layer 400 plays a role of a Color Filter (CF), and may replace an externally-hung polarizer, or may replace a color filter that is separately provided in the prior art, to filter light emitted from the organic light emitting diode 200, so as to play a role in reducing the external light of the display panel, and the filter shielding layer 400 may have both functions of shielding and filtering.
The display panel provided by the embodiment of the application, the filtering and reflection reducing function of the filtering shielding layer 400 can be realized through the sub-wavelength periodic nanostructure, the shielding function can be realized by the metal material, and the filtering effect is realized by utilizing the surface plasmon resonance excitation principle of the metal nano periodic structure and selectively transmitting light waves with certain wavelength and bandwidth in the visible light wave band through the metal nanostructures with different periods and sizes. The display panel is easy to obtain, shielding and filtering can be integrated into one film layer, the film layer is reduced, and the thickness of the display panel is additionally reduced. Can realize that the display effect is improved and simultaneously becomes lighter and thinner.
In one possible embodiment, the sub-wavelength periodic nanostructure may comprise a one-dimensional grating periodic structure or a two-dimensional grating periodic structure. The sub-wavelength periodic nanostructure may be a one-dimensional grating periodic structure of a stripe shape or a two-dimensional grating periodic structure of a periodic round hole, a triangle, a rectangle, etc., or may be other sub-wavelength periodic structures, which is not particularly limited in this application. The parameters such as the one-dimensional grating period or the aperture can be adjusted to control the filter shielding layer 400 to selectively transmit light waves with certain wavelength and bandwidth in the visible light band, so as to play a role in filtering. Taking a circular hole type two-dimensional grating periodic structure as an example, the metal nano periodic circular hole grating structures with different aperture diameters and different periodic structures can respectively correspond to the organic light emitting diodes 200 with different colors, so as to filter light.
According to the display panel provided by the embodiment of the application, the parameters such as the one-dimensional grating period or the aperture are adjusted to control the light wave of the filter shielding layer 400 to selectively penetrate the light wave with certain wavelength and bandwidth in the visible light wave band so as to correspond to the organic light emitting diode 200 emitting light with different colors, the light emitted by the organic light emitting diode 200 is filtered, the function of a color filter film is achieved, the adjustment of the filtered color is finer, the adjustment precision is higher, and the ideal filtering effect can be achieved.
In a possible implementation, the material of the filter shielding layer 400 may be selected from a metal material such as silver, gold, copper, titanium-aluminum-titanium laminate, or single-layer aluminum. The quality of the nano periodic structure made of gold and silver is good, and particularly, as gold and silver have higher surface plasma excitation efficiency in a visible light wave band, the color filter film with the periodic nano structure made of gold or silver has better optical properties, such as high transmittance, narrower transmission spectrum linewidth and the like, so that fine adjustment of colors can be realized, and the high resolution and high transmittance characteristics of the manufactured metal color filter film can be ensured. In addition, the silver nanostructure can obtain higher transmission intensity and extremely narrow spectrum linewidth, so that the cross effect among different colors can be effectively avoided.
In one possible embodiment, the filter-shielding layer 400 may be obtained through a plasma dry etching process, a focused ion beam etching process, a nanoimprint process, or the like, and the process is mature and easy to implement.
In one possible embodiment, the thickness of the filter-shielding layer 400 ranges from 10nm to 100nm.
In the display panel provided by the embodiment of the application, if the thickness of the filter shielding layer 400 is smaller than 10nm, the film layer is too thin, and the process is difficult to realize. Since the thinner the filter-shielding layer 400 is, the better the anti-reflection effect against external light is, the thickness of the filter-shielding layer 400 should not be too thick, but not more than 100nm.
In one possible implementation, fig. 7 is a schematic partial structure of another display panel provided in an embodiment of the present application. For example, referring to fig. 1 and 7, the filter-shielding layer 400 includes a plurality of hollowed-out areas 420, and the first touch electrode layer 600 includes a plurality of touch electrode leads 610; the front projection portion of the hollowed-out area 420 on the driving substrate 100 covers the front projection of the touch electrode lead 610 on the driving substrate 100. The front projection of the light shielding pattern 710 on the driving substrate 100 covers the target projection, wherein the target projection is the front projection of the hollowed-out area 420 on the driving substrate 100 and the front projection of the touch electrode lead 610 on the driving substrate. The hollowed-out area 420 is disposed right under the touch electrode lead 610 and is covered by the light shielding pattern 710.
In the display panel provided by the embodiment of the application, the plurality of hollow areas 420 are arranged on the optical filtering shielding layer 400, the hollow areas 420 correspond to the wiring positions of the touch electrode leads 610, the optical filtering shielding layer 400 is used as the background capacitance of the touch electrode leads 610, and the hollow pattern design is performed on the optical filtering shielding layer 400, so that the background capacitance of the touch electrode leads 610 can be reduced, and RC loading is further reduced. Therefore, the filter shielding layer 400 between the organic light emitting diode 200 and the first touch electrode layer 600 can effectively reduce display noise received by the touch electrode lead 610 by means of parasitic capacitive coupling and capacitive filtering.
In a possible implementation manner, fig. 8 is a schematic partial structure of a display panel according to another embodiment of the present application; fig. 9 is a sectional view of a partial structure of a display panel according to another embodiment of the present application along D-D'. Referring to fig. 8 and 9, the display panel further includes: the second touch electrode layer 900, the second touch electrode layer 900 is disposed between the first touch electrode layer 600 and the light shielding layer 700, and the second insulating layer P00 is disposed between the first touch electrode layer 600 and the second touch electrode layer 900. The second touch electrode layer 900 includes a plurality of touch electrode blocks 910, a plurality of vias P10 are disposed on the second insulating layer P00, and the touch electrode leads 610 are electrically connected to the touch electrode blocks 910 through the vias P10. As shown in fig. 8, each touch electrode block 910 is electrically connected to one touch electrode lead 610 through one via P10, and each touch electrode block 910 may be electrically connected to two or more touch electrode leads 610 through two or more vias P10, which is not particularly limited in this application. It should be noted that, an optical adhesive layer (OC) may be further disposed between the second touch electrode layer 900 and the light shielding layer 700, the optical adhesive layer may be used for flattening the touch electrode block 910 and protecting the touch electrode block 910, and a cover plate may be further disposed on the flattening layer 800, where the cover plate is used for protecting all devices and film layers under the cover plate in an overall strength manner, which is not specifically limited in this application. The display panel provided by the embodiment of the application adopts a touch implementation mode of self-capacitance.
In a possible implementation manner, fig. 10 is a schematic structural diagram of still another display panel provided in the embodiment of the present application; FIG. 11 is a schematic view of a partial structure of another display panel according to an embodiment of the disclosure; fig. 12 is a sectional view of a part of a structure of another display panel provided in an embodiment of the present application along line E-E', and in combination with fig. 10-12, the display panel further includes: the second touch electrode layer 900, the second touch electrode layer 900 is disposed between the first touch electrode layer 600 and the light shielding layer 700, and the second insulating layer P00 is disposed between the first touch electrode layer 600 and the second touch electrode layer 900. The second touch electrode layer 900 may include a plurality of touch electrodes 920, and the touch electrode leads 610 and the touch electrodes 920 cross each other to define a touch sensing area T. In fig. 10-12, a mutual capacitance touch scheme is adopted, and the touch electrode lead 610 and the touch electrode 920 may be Tx (driving electrode) or Rx (sensing electrode), respectively, which is not specifically limited in this application.
The display panel provided by the embodiment of the application adopts a mode that two touch electrodes cross to limit an induction area to realize a touch function.
Note that the first insulating layer 500 and the second insulating layer P00 may be made of the same material, and the present application is not particularly limited.
In a second aspect, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in fig. 13, the present application provides a display device, which may include: a display panel 1000, the display panel 1000 being the display panel of the foregoing embodiment; other components may also be included, not specifically described herein. The display device provided in this embodiment may be a smart phone, a tablet computer, a notebook computer, and other displays, and the application is not limited specifically.
While preferred embodiments of the present description have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.
Claims (9)
1. A display panel provided with a driving substrate, comprising: the organic light-emitting diode, the packaging layer, the light-filtering shielding layer, the first insulating layer and the first touch electrode layer;
the organic light emitting diode, the packaging layer, the light filtering shielding layer, the first insulating layer and the first touch electrode layer are sequentially arranged on the driving side of the driving substrate;
the optical filtering shielding layer is used for electrically connecting constant potential and comprises a plurality of hollowed-out areas;
the first touch electrode layer comprises a plurality of touch electrode leads;
the orthographic projection part of the hollowed-out area on the driving substrate covers orthographic projection of the touch electrode lead on the driving substrate;
the touch electrode comprises a first insulating layer, a second insulating layer, a first touch electrode layer, a second touch electrode layer and a second insulating layer, wherein the first insulating layer is arranged on the first touch electrode layer;
the shading layer comprises a shading pattern and a shading opening area, and the shading opening area is used for enabling light rays emitted by the organic light-emitting diode to be transmitted;
the filter shielding layer comprises a plurality of filter areas, and the orthographic projection of the filter areas on the driving substrate covers the orthographic projection of the shading opening areas on the driving substrate.
2. The display panel of claim 1, wherein the orthographic projection of the light shielding pattern on the driving substrate covers a target projection, wherein the target projection is an orthographic projection of the hollowed-out area on the driving substrate and an orthographic projection of the touch electrode lead on the driving substrate.
3. The display panel of claim 1, further comprising: the second touch electrode layer is arranged between the first touch electrode layer and the shading layer, and a second insulating layer is arranged between the first touch electrode layer and the second touch electrode layer;
the second touch electrode layer comprises a plurality of touch electrode blocks, a plurality of through holes are formed in the second insulating layer, and the touch electrode leads are electrically connected with the touch electrode blocks through the through holes.
4. The display panel of claim 1, further comprising: the second touch electrode layer is arranged between the first touch electrode layer and the shading layer, and a second insulating layer is arranged between the first touch electrode layer and the second touch electrode layer;
the second touch electrode layer comprises a plurality of touch electrodes, and the touch electrode leads and the touch electrodes are intersected to define a touch sensing area.
5. The display panel of claim 1, wherein the filter-shielding layer comprises sub-wavelength periodic nanostructures.
6. The display panel of claim 5, wherein the sub-wavelength periodic nanostructure comprises a one-dimensional grating periodic structure or a two-dimensional grating periodic structure.
7. The display panel of claim 1, wherein the thickness of the filter-shielding layer ranges from 10nm to 100nm.
8. The display panel of claim 1, further comprising a ground lead, the filter-shield layer being electrically connected to the ground lead.
9. A display device, comprising: the display panel of any one of claims 1-8.
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| CN202110172412.3A CN112992996B (en) | 2021-02-08 | 2021-02-08 | Display panel and display device |
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| CN202110172412.3A CN112992996B (en) | 2021-02-08 | 2021-02-08 | Display panel and display device |
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| CN112114702A (en) * | 2020-09-08 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
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| CN206312114U (en) * | 2016-10-31 | 2017-07-07 | 南昌欧菲光科技有限公司 | Touch-screen and its suspension touch control component |
| CN106932942A (en) * | 2017-03-24 | 2017-07-07 | 厦门天马微电子有限公司 | Touch control display apparatus |
| KR20190081756A (en) * | 2017-12-29 | 2019-07-09 | 엘지디스플레이 주식회사 | Electro-luminescence display apparatus with touch sensor |
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