CN111769204B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111769204B CN111769204B CN202010591950.1A CN202010591950A CN111769204B CN 111769204 B CN111769204 B CN 111769204B CN 202010591950 A CN202010591950 A CN 202010591950A CN 111769204 B CN111769204 B CN 111769204B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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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
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Abstract
The embodiment of the invention discloses a display panel and a display device, wherein the display panel comprises a display functional layer and a touch functional layer; the touch functional layer comprises a barrier layer, a first inorganic insulating layer, a second inorganic insulating layer, a touch electrode layer and a substrate, wherein the barrier layer is positioned in the display area and is sequentially arranged on the light emergent side of the display functional layer; the vertical projection of the barrier layer on the substrate covers the vertical projection of the first inorganic insulating layer on the substrate. Because the density of first inorganic insulating layer is less, can adsorb more hydrone or other impurity, through add the barrier layer between first inorganic insulating layer and display function layer, and set up the vertical projection of barrier layer on the substrate base plate and cover the vertical projection of first inorganic insulating layer on the substrate base plate, guarantee to pass through the barrier layer can separation hydrone or other impurity and get into the display function layer, guarantee to show that the function layer avoids the erosion of hydrone or other impurity.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
The touch screen has the advantages of easy operability, intuition, flexibility and the like, and has become a main man-machine interaction means for personal mobile communication equipment and integrated information terminals, such as tablet computers, smart phones, super notebook computers and the like.
At present, for an organic light emitting display panel integrating a touch function, some film layers in a touch function layer are easy to adsorb water molecules or impurities on the surfaces of the film layers due to density reasons, and the water molecules or the impurities enter the display panel to easily cause brightness attenuation of the display panel, so that normal display of the display panel is affected.
Disclosure of Invention
The invention provides a display panel and a display device, wherein a blocking layer is additionally arranged to block water molecules or impurities adsorbed by a first inorganic insulating layer in a touch control functional layer due to density, so that the water molecules or the impurities are prevented from displaying the functional layer, and the good display effect of the display panel is ensured.
In a first aspect, an embodiment of the present invention provides a display panel, including a display functional layer and a touch functional layer;
the display panel further comprises a display area, the touch control functional layer comprises a blocking layer, a first inorganic insulating layer, a second inorganic insulating layer, a touch control electrode layer and a substrate, the blocking layer, the first inorganic insulating layer, the second inorganic insulating layer, the touch control electrode layer and the substrate are positioned in the display area and are sequentially arranged on the light emitting side of the display functional layer, and the density of the first inorganic insulating layer is smaller than that of the second inorganic insulating layer;
the vertical projection of the barrier layer on the substrate covers the vertical projection of the first inorganic insulating layer on the substrate.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect.
According to the display panel and the display device provided by the embodiment of the invention, the touch functional layer comprises the blocking layer, the first inorganic insulating layer, the second inorganic insulating layer, the touch electrode layer and the substrate which are positioned in the display area and sequentially arranged on the light emergent side of the display functional layer, the density of the first inorganic insulating layer is smaller than that of the second inorganic insulating layer, so that moisture or other impurities are easily adsorbed in the first inorganic insulating layer, the blocking layer is additionally arranged between the first inorganic insulating layer and the display functional layer, the vertical projection of the blocking layer on the substrate covers the vertical projection of the first inorganic insulating layer on the substrate, the moisture or other impurities adsorbed by the first inorganic insulating layer is blocked by the blocking layer to carry out the display functional layer, the display functional layer is prevented from being corroded by water molecules or other impurities, and the normal display of the display panel is ensured.
Drawings
FIG. 1 is a schematic diagram of a display panel in the related art;
FIG. 2 is a block diagram of an embodiment of the present invention a schematic structural diagram of a first inorganic insulating layer;
fig. 3 is a schematic structural diagram of a second inorganic insulating layer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of the display panel shown in FIG. 4 along the sectional line D-D';
FIG. 6 is a schematic vertical projection of a barrier layer and a first inorganic insulating layer on a substrate;
FIG. 7 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the sectional line D-D';
FIG. 8 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the sectional line D-D';
FIG. 9 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the sectional line D-D';
FIG. 10 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the sectional line D-D';
fig. 11 is a schematic vertical projection view of a touch electrode block, an insulating structure, a barrier structure and a supporting pillar on a substrate according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view of the display panel provided in FIG. 4 along the line E-E';
FIG. 13 is a schematic cross-sectional view of the display panel provided in FIG. 4 along the section line E-E';
FIG. 14 is a cross-sectional view of the display panel shown in FIG. 4 along the section line F-F';
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a display panel in the related art, and as shown in fig. 1, a display panel 10 includes a display functional layer 11 and a touch functional layer 12; the display panel 10 further includes a display area AA, the touch functional layer 12 includes a first inorganic insulating layer 121, a second inorganic insulating layer 122, a touch electrode layer 123 and a substrate 124, which are located in the display area AA and sequentially disposed on the light emitting side of the display functional layer 11, and the density of the first inorganic insulating layer 121 is less than that of the second inorganic insulating layer 122.
Illustratively, the first inorganic insulating layer 111 is generally formed by a low-temperature film forming process. For example, it is generally recognized that silicon oxide has a high water-oxygen barrier ability, and silicon oxide is generally used as a water-oxygen barrier layer. Practical experiments show that when the film forming temperature of the silicon oxide is lower than 240 ℃, the compactness is low, the internal structure is loose, fig. 2 is a structural schematic diagram of a first inorganic insulating layer provided by the embodiment of the invention, and as shown in fig. 2, the pores in the low-temperature silicon oxide film are large, and cannot prevent external small molecules (water or impurities) from entering the film; fig. 3 is a schematic structural view of a second inorganic insulating layer according to an embodiment of the present invention, as shown in fig. 3, in a silicon oxide film formed at a higher temperature, the density is higher, pores in the silicon oxide film are smaller, and external water molecules and impurities cannot enter the silicon oxide film. Therefore, the first inorganic insulating layer 121 formed at a low temperature easily adsorbs small molecules (water or impurities) from the outside into the first inorganic insulating layer 121.
For the organic light emitting display panel, one side of the display function layer 11 close to the touch function layer 12 generally includes a cathode 111 and an organic material layer 112, and the cathode 111 and the organic material layer 112 are generally prepared by an evaporation process, so that moisture or other impurities enter the cathode 111 and the organic material layer 112 to damage the cathode 111 and the organic material layer 112, which affects the attenuation of the display brightness of the organic light emitting display panel and affects the normal display of the display panel.
Based on the above technical problem, an embodiment of the present invention provides a display panel, including a display functional layer and a touch functional layer; the display panel further comprises a display area, the touch functional layer comprises a blocking layer, a first inorganic insulating layer, a second inorganic insulating layer, a touch electrode layer and a substrate, the blocking layer, the first inorganic insulating layer, the second inorganic insulating layer, the touch electrode layer and the substrate are positioned in the display area and are sequentially arranged on the light emergent side of the display functional layer, and the density of the first inorganic insulating layer is smaller than that of the second inorganic insulating layer; the vertical projection of the barrier layer on the substrate covers the vertical projection of the first inorganic insulating layer on the substrate. Adopt above-mentioned technical scheme, through setting up the barrier layer between first inorganic insulating layer and demonstration functional layer, set up the vertical projection of barrier layer on the substrate base plate simultaneously and cover the vertical projection of first inorganic insulating layer on the substrate base plate, show the functional layer through the moisture or other impurity that the first inorganic insulating layer of barrier layer separation adsorbs, guarantee to show that the functional layer avoids the erosion of hydrone or other impurity, guarantee that display panel normally shows.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of a cross section of the display panel shown in fig. 4 along a section line D-D', as shown in fig. 4 and fig. 5, a display panel 20 according to an embodiment of the present invention includes a display functional layer 21 and a touch functional layer 22; the display panel 20 further includes a display area AA, the touch functional layer 22 includes a barrier layer 221, a first inorganic insulating layer 222, a second inorganic insulating layer 223, a touch electrode layer 224 and a substrate 225, which are located in the display area AA and sequentially disposed on the light emitting side of the display functional layer 21, and the density of the first inorganic insulating layer 222 is less than that of the second inorganic insulating layer 223; the vertical projection of the barrier layer 221 on the substrate base 225 covers the vertical projection of the first inorganic insulating layer 222 on the substrate base.
Illustratively, the first inorganic insulating layer 222 and the second inorganic insulating layer 223 are located between the touch electrode layer 224 and the display function layer 21, and are used to form a spacer layer between the touch electrode layer 224 and the cathode 211, so as to avoid mutual interference between the display signal and the touch signal, and ensure good display effect and touch effect.
Since the film formation temperature of the first inorganic insulating layer 222 is lower than that of the second inorganic insulating layer 223, the density of the first inorganic insulating layer 222 is lower than that of the second inorganic insulating layer 223, and thus the first inorganic insulating layer 222 with lower density is easy to adsorb external small molecules (water or impurities) into the first inorganic insulating layer 222. Therefore, the invention creatively adds the barrier layer 221 between the first inorganic insulating layer 222 and the display functional layer 21, and further sets the vertical projection of the barrier layer 221 on the substrate 225 to cover the vertical projection of the first inorganic insulating layer 222 on the substrate, so that the barrier layer 221 can completely block the moisture or other impurities adsorbed due to the low density of the first inorganic insulating layer 222 from entering the display functional layer 21, and ensure that the display functional layer 21 is protected from the moisture or other impurities. Further, the addition of the barrier layer 221 can further increase the distance between the touch electrode layer 224 and the cathode 211, further reduce the mutual interference between the display signal and the touch signal, and further ensure that the display effect and the touch effect are both good.
Optionally, the blocking layer 221 may be a transparent blocking layer, so as to ensure that normal light-emitting display of the display panel 21 is not affected by the additional blocking layer 221.
Further, as shown in fig. 5, the display function layer 21 may include a cathode 211 and a light emitting material layer 212 close to the touch function layer 22, and the light emitting material layer 212 may further include a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and other multiple film layers, where the cathode 211 and the light emitting material layer 212 are both prepared by an evaporation process, and if water vapor or other impurities enter the cathode 211 or the light emitting material layer 212, the cathode 211 and the light emitting material layer 212 may fail to cause display abnormality, such as brightness attenuation, which affects normal display of the display panel. The blocking layer 221 can completely block the absorbed water vapor or other impurities from the first inorganic insulating layer 222 due to the low density, so as to ensure that the cathode 211 and the light-emitting material layer 212 obtained by the evaporation process are prevented from being corroded by the water vapor or other impurities, and ensure that the display panel normally displays.
Optionally, as shown in fig. 5, in the display panel 20 provided in the embodiment of the present invention, the touch function layer 22 further includes a touch electrode layer 224, and the touch electrode layer 224 recognizes a touch position or a touch pressure of a user by sensing a touch operation or a pressing operation of the user, so as to implement touch position detection or touch pressure detection.
Optionally, as shown in fig. 5, in the display panel 20 provided in the embodiment of the present invention, the display function layer 21 may further include a supporting pillar 213, a pixel defining layer 214, an anode 215, and a driving circuit 216, so as to ensure that the display panel can normally display.
In summary, in the display panel provided in the embodiment of the present invention, because the density of the first inorganic insulating layer in the touch functional layer is less than the density of the second inorganic insulating layer, moisture or other impurities are easily adsorbed in the first inorganic insulating layer, a barrier layer is additionally disposed between the first inorganic insulating layer and the display functional layer, and a vertical projection of the barrier layer on the substrate is further disposed to cover a vertical projection of the first inorganic insulating layer on the substrate, so that the barrier layer blocks moisture or other impurities adsorbed by the first inorganic insulating layer to perform the display functional layer, thereby ensuring that the display functional layer is prevented from being corroded by water molecules or other impurities, and ensuring that the display panel normally displays images.
On the basis of the above embodiment, with continued reference to fig. 5, the vertical projection of the first inorganic insulating layer 222 on the substrate base 225 covers the vertical projection of the touch electrode layer 224 on the substrate base 225.
For example, as shown in fig. 5, the vertical projection of the first inorganic insulating layer 222 on the substrate 225 covers the vertical projection of the touch electrode layer 224 on the substrate 225, so that the first inorganic insulating layer 222 can reduce the signal interference between the display function layer 21 and the touch function layer 22, which can reduce the interference of the display signal to the touch signal and the interference of the touch signal to the display signal, thereby ensuring good display effect and touch effect.
On the basis of the above embodiment, the barrier layer 221 can include a plurality of different arrangements by sufficiently blocking moisture or other impurities adsorbed by the first inorganic insulating layer 222 from entering the display functional layer 21 through the barrier layer 221, and the arrangement of the barrier layer 221 is described below in two possible embodiments.
As a possible implementation, fig. 6 is a schematic vertical projection of the barrier layer and the first inorganic insulating layer on the substrate, and in conjunction with fig. 5 and fig. 6, the vertical projection of the first inorganic insulating layer 222 on the substrate 225 includes a first edge 222a, the vertical projection of the barrier layer 221 on the substrate 225 includes a second edge 221a, and the second edge 221a is disposed corresponding to the first edge 222 a; the distance between the first edge 222a and the second edge 221a in a direction perpendicular to the direction of extension of the first edge is L, wherein,
2μm≤L≤5μm。
specifically, as shown in fig. 6, the first edge 222a and the second edge 221a are a set of edges disposed oppositely, and taking fig. 6 as an example, the first edge 222a may be a right edge of the first inorganic insulating layer 222 in a vertical projection on the substrate base 225, and the second edge 221a corresponds to a right edge of the barrier layer 221 in a vertical projection on the substrate base 225; or the first edge 222a may be a lower edge of the first inorganic insulating layer 222 in a vertical projection on the substrate 225, and the second edge 221a corresponds to a lower edge of the barrier layer 221 in a vertical projection on the substrate 225.
The distance L between the first edge 222a and the second edge 221a satisfies 2 μm L5 μm, for example L may be 2 μm, 3 μm, 3.5 μm or 5 μm, and the specific value of the distance between the first edge 222a and the second edge 221a is not limited in the embodiments of the present invention. The distance between the first edge 222a and the second edge 221a is reasonably set, so that on one hand, the barrier layer 221 can be ensured to fully prevent moisture or other impurities adsorbed by the first inorganic insulating layer 222 from entering the display function layer 21, and normal display of the display function layer 21 is ensured; on the other hand, the barrier layer 221 is prevented from being too large to extend to the non-display area of the display panel 20, which may affect the display area ratio. Note that, the perpendicular projection of the barrier layer 221 on the base substrate 225 may overlap the base substrate 225, and in order to show the base substrate 225 in fig. 6, the perpendicular projection of the barrier layer 221 on the base substrate 225 is described as being located within the base substrate 225.
As another possible implementation manner, fig. 7 is a schematic cross-sectional view of the display panel provided in fig. 4 along a section line D-D', and as shown in fig. 7, the first inorganic insulating layer 222 includes a first surface 222b close to a side of the substrate base 225, a second surface 222c far from the side of the substrate base 225, and a side 222D connecting the first surface 222b and the second surface 222 c; barrier layer 221 includes interconnected first and second barrier sections 2211 and 2212; the first barrier subsection 2211 is located at a side of the second surface 222c away from the substrate base 225, and a perpendicular projection of the first barrier subsection 2211 on the substrate base 225 covers a perpendicular projection of the second surface 222c on the substrate base 225; second barrier subsection 2212 wraps around side 222d.
Specifically, as shown in fig. 7, the perpendicular projection of the second surface 222c on the substrate base 225 is covered by the perpendicular projection of the first barrier subsection 2211 on the substrate base 225; the second blocking subsection 2212 covers the side face 222d, the blocking layer 221 completely covers the first inorganic insulating layer 222, and a path for water vapor or other impurities in the first inorganic insulating layer 222 to enter the display function layer 21 from the lower surface or the side face of the first inorganic insulating layer 222 is blocked, so that the blocking layer 221 can sufficiently block the water vapor or other impurities adsorbed by the first inorganic insulating layer 222 from entering the display function layer 21, and normal display of the display function layer 21 is guaranteed.
The above two possible embodiments describe the arrangement of the barrier layer 221, so as to ensure that the barrier layer 221 can sufficiently block moisture or other impurities adsorbed by the first inorganic insulating layer 222 from entering the display functional layer 21, and ensure that the display functional layer 21 normally displays.
The above embodiment has been described by taking the example that the first inorganic insulating layer 222 and the barrier layer 221 in the display panel 20 are disposed as a whole layer, it is understood that the first inorganic layer 222 may further include a plurality of block-shaped insulating structures, and the barrier layer 221 may include a plurality of block-shaped barrier structures. The following describes a technical solution in which the first inorganic layer 222 includes a plurality of block-shaped insulating structures, and the barrier layer 221 includes a plurality of block-shaped barrier structures.
Fig. 8 is a schematic cross-sectional view of the display panel provided in fig. 4 along a sectional line D-D ', and fig. 9 is a schematic cross-sectional view of the display panel provided in fig. 4 along a sectional line D-D', where as shown in fig. 8 and 9, the first inorganic insulating layer 222 includes a plurality of block-shaped insulating structures 2221, and the barrier layer 221 includes a plurality of block-shaped barrier structures 2213; barrier structures 2213 correspond one-to-one to insulating structures 2221, and the vertical projection of barrier structures 2213 on substrate base 225 covers the vertical projection of insulating structures 2224 on substrate base 225.
For example, as shown in fig. 8 and 9, by providing the first inorganic insulating layer 222 with a plurality of block-shaped insulating structures 2221, the coverage area of the first inorganic insulating layer 222 with adsorbed moisture or other impurities can be reduced, that is, the total amount of moisture or other impurities adsorbed by the first inorganic insulating layer 222 can be reduced, and the total amount of moisture or other impurities entering the display function layer 21 can be reduced. Meanwhile, the correspondingly disposed barrier layer 221 includes a plurality of block-shaped barrier structures 2213; the blocking structures 2213 correspond to the insulating structures 2221 one to one, and the vertical projection of the blocking structures 2213 on the substrate base 225 covers the vertical projection of the insulating structures 2224 on the substrate base 225, so that each blocking structure 2213 can fully block water vapor or other impurities adsorbed in each insulating structure 2221 from entering the display function layer 21, and normal display of the display function layer 21 is guaranteed.
Alternatively, the blocking structures 2213 block moisture or other impurities adsorbed in the insulating structures 2221 from entering the display function layer 21, and as shown in fig. 8, the edge of the blocking structure 2213 may be arranged to extend outward by a distance, for example, 2 μm to 5 μm, relative to the edge of the insulating structure 2221; as shown in fig. 9, the blocking structures 2213 may be disposed to completely wrap the insulating structures 2221, so as to ensure that the blocking structures 2213 can sufficiently block moisture or other impurities adsorbed by the insulating structures 2221 from entering the display functional layer 21, and ensure that the display functional layer 21 normally displays.
Further, as shown in fig. 8 and fig. 9, the touch electrode layer 224 includes a plurality of touch electrode blocks 2241, the number of the insulating structures 2211 may be greater than or equal to the number of the touch electrode blocks 2241, and the insulating structures 2211 and the touch electrode blocks 2241 may be disposed in a one-to-one correspondence manner, or may be disposed in a one-to-many manner, but it needs to be ensured that the vertical projection of the insulating structures 2211 on the substrate 225 covers the vertical projection of the touch electrode blocks 2241 on the substrate 225, so that the insulating structures 2211 can reduce the mutual interference of signals between the display function layer 21 and the touch function layer 22, which can reduce the interference of display signals to touch signals, also reduce the interference of touch signals to display signals, and ensure good display effect and touch effect.
On the basis of the foregoing embodiment, fig. 10 is a schematic cross-sectional view of the display panel provided in fig. 4 along a sectional line D-D', and fig. 11 is a schematic vertical projection view of the touch electrode block, the insulating structure, the barrier structure, and the supporting pillars on the substrate according to the embodiment of the present invention, wherein the touch electrode block may be a grid-shaped touch electrode block. As shown in fig. 10 and 11, the display function layer 21 includes a plurality of support columns 213 located in the display area AA, the support columns 213 correspond to the insulating structures 2211 one to one, and the vertical projection of the support columns 213 on the substrate base 225 covers the vertical projection of the insulating structures 2211 on the substrate base 225.
Illustratively, the support columns 213 serve to support the luminescent material layer 212 and the cathode in the display functional layer 21, and to support the touch functional layer 22. The supporting columns 213 are arranged in one-to-one correspondence with the insulating structures 2211, and the vertical projection of the supporting columns 213 on the substrate 225 covers the vertical projection of the insulating structures 2211 on the substrate 225, that is, it is ensured that the insulating structures 2211 exist, and the coverage area of the insulating structures 2211 is small, on one hand, it is ensured that the insulating structures 2211 can normally support the second insulating layer 223, the touch electrode layer 224 and the substrate 225, on the other hand, a normal distance between the display functional layer 21 and the touch functional layer 22 can be ensured, so as to avoid mutual interference between display signals and touch signals, on the other hand, by setting the coverage area of the insulating structures 2211 to be small, the dielectric constant (air dielectric constant is smaller than that of the insulating structures) of the film layer between the touch electrode layer 224 and the metal layer (such as a gate, a source or a drain) in the display functional layer 21 is reduced as much as possible, the capacitance between the touch electrode layer 224 and the metal layer in the display functional layer 21 is reduced, and the display effect and the parasitic capacitance is ensured to be good.
The above embodiment describes the whole layer arrangement and the block arrangement of the first inorganic insulating layer 222, the whole layer arrangement and the block arrangement of the barrier layer 221 in the display area AA, respectively, and the following describes in detail the arrangement of the display functional layer and the touch functional layer in the non-display area.
Fig. 12 is a schematic cross-sectional view of the display panel provided in fig. 4 along a section line E-E', and in conjunction with fig. 4 and 12, the display panel 20 may further include a non-display area NAA located at one side of the display area AA, where the non-display area NAA includes a terminal-setting area BB; the touch functional layer 22 includes a first transparent conductive layer 226, a third inorganic insulating layer 227, a fourth inorganic insulating layer 228, a touch signal trace 229 and a substrate 225, which are located in the terminal installation area BB and sequentially disposed on the light emitting side of the display functional layer 21; the first transparent conductive layer 226 is electrically connected to the signal transmission terminal 217 in the display function layer 21, and the touch signal trace 229 and the first transparent conductive layer 226 are electrically connected through a via hole (not shown) in the third inorganic insulating layer 227 and the fourth inorganic insulating layer 228; the density of the third inorganic insulating layer 227 is less than that of the fourth inorganic insulating layer 228, and a vertical projection of the first transparent conductive layer 226 on the base substrate 225 covers a vertical projection of the third inorganic insulating layer 227 on the base substrate 225.
For example, the display panel 20 may further include a terminal installation area BB located on one side of the display area AA, in the terminal installation area BB, the display function layer 21 further includes a signal transmission terminal 217 located on one side close to the touch function layer 22, the signal transmission terminal 217 is electrically connected to the first transparent conductive layer 226 in the touch function layer 22, meanwhile, the touch signal trace 229 and the first transparent conductive layer 226 are electrically connected through a via hole (not shown) located in the third inorganic insulating layer 227 and the fourth inorganic insulating layer 228, the touch signal trace 229 is electrically connected to the touch electrode in the touch electrode layer 224, and the signal transmission terminal 217 is electrically connected to the driving chip, so that the touch signal 217 may be transmitted to the touch electrode layer 224 sequentially through the driving chip, the signal transmission terminal 217, the first transparent conductive layer 226 and the touch signal trace 229, or transmitted to the driving chip through the touch electrode layer 224, the touch signal transmission terminal 229, the first transparent conductive layer 226 and the signal transmission terminal 217, thereby implementing a normal touch function.
Further, the film formation temperature of the third inorganic insulating layer 227 is lower than that of the fourth inorganic insulating layer 228, so that the density of the third inorganic insulating layer 227 is lower than that of the fourth inorganic insulating layer 228, and thus the third inorganic insulating layer 227 with lower density is likely to adsorb external small molecules (water or impurities) into the third inorganic insulating layer 227. Therefore, according to the invention, the vertical projection of the first transparent conductive layer 226 on the substrate 225 covers the vertical projection of the third inorganic insulating layer 227 on the substrate, so that the first transparent conductive layer 226 can completely block the moisture or other impurities adsorbed due to the low density of the third inorganic insulating layer 227 from entering the display functional layer 21, and the display functional layer 21 is protected from the moisture or other impurities.
It should be noted that, in the present invention, the vertical projection of the first transparent conductive layer 226 on the substrate 225 covers the vertical projection of the third inorganic insulating layer 227 on the substrate, and as shown in fig. 12, the edge of the first transparent conductive layer 226 is extended outward by a distance, for example, 2 μm to 5 μm, relative to the edge of the third inorganic insulating layer 227; the first transparent conductive layer 226 may also be completely wrapped and covered by the third inorganic insulating layer 227 (not shown in the figure), so as to ensure that the first transparent conductive layer 226 can fully prevent moisture or other impurities adsorbed by the third inorganic insulating layer 227 from entering the display functional layer 21, and ensure that the display functional layer 21 displays normally.
On the basis of the above embodiment, with reference to fig. 12, the barrier layer 221 and the first transparent conductive layer 226 are disposed on the same layer, and the barrier layer 221 and the first transparent conductive layer 226 are disposed in an insulating manner; the third inorganic insulating layer 227 and the first inorganic insulating layer 222 are disposed on the same layer and are not connected to each other; the fourth inorganic insulating layer 228 and the second inorganic insulating layer 223 are provided in the same layer and communicate with each other; the touch signal trace 229 and the touch electrode layer 224 are disposed on the same layer and electrically connected.
Specifically, the barrier layer 221 is used for blocking water vapor or other impurities in the first inorganic insulating layer 222 to display the functional layer 21, the first transparent conductive layer 226 is used for blocking water vapor or other impurities in the third inorganic insulating layer 222 to display the functional layer 21, and the barrier layer 221 and the first transparent conductive layer 226 are arranged on the same layer, the same material and the same process are adopted for preparation, the functional layer 21 cannot be displayed by water vapor or other impurities, the film layer in the touch functional layer 22 is simple to set, and the preparation process is simple. Further, the barrier layer 221 and the first transparent conductive layer 226 are disposed in an insulating manner, and the barrier layer 221 can be disposed in an electrical insulating manner, so that it is ensured that the display functional layer 21 is not interfered by the additionally disposed barrier layer 221, and the display panel is ensured to display normally.
The third inorganic insulating layer 227 and the first inorganic insulating layer 222 are disposed on the same layer, and can be prepared by using the same material and synchronous process, so as to ensure simple film layer arrangement and simple preparation process in the touch functional layer 22. Since the blocking layer 221 is not in insulation communication with the first transparent conductive layer 226, the third inorganic insulating layer 227 is not in insulation communication with the first inorganic insulating layer 222 in order to avoid the problem that moisture or other impurities enter the display function layer 21 due to the fact that the blocking layer 221 or the first transparent conductive layer 226 is not located at the communication position of the third inorganic insulating layer 227 and the first inorganic insulating layer 222.
The fourth inorganic insulating layer 228 and the second inorganic insulating layer 223 are disposed on the same layer and are communicated with each other, and can be prepared by the same material and synchronous process, so that the film layer in the touch functional layer 22 is simple to set, and the preparation process is simple.
The touch signal traces 229 and the touch electrode layer 224 are disposed on the same layer and electrically connected, and can be prepared by the same material and synchronous process, so as to ensure simple film layer arrangement and simple preparation process in the touch functional layer 22.
As a possible implementation manner, fig. 13 is another schematic cross-sectional structure of the display panel provided in fig. 4 along a section line E-E', and as shown in fig. 13, the touch functional layer 22 may further include a second transparent conductive layer 230 located in the terminal disposing region BB and located between the third inorganic insulating layer 227 and the fourth inorganic insulating layer 228; the first transparent conductive layer 226 and the second transparent conductive layer 230 are electrically connected through a via hole (not shown) in the third inorganic insulating layer 227, and the second transparent conductive layer 230 and the touch signal trace 229 are electrically connected through a via hole (not shown) in the fourth inorganic insulating layer 228.
For example, referring to fig. 13, in the terminal disposing area BB, the touch function layer 22 may further include a second transparent conductive layer 230 located in the terminal disposing area BB and located between the third inorganic insulating layer 227 and the fourth inorganic insulating layer 228, the first transparent conductive layer 226 and the second transparent conductive layer 230 are electrically connected through a via hole located in the third inorganic insulating layer 227, and the second transparent conductive layer 230 and the touch signal trace 229 are electrically connected through a via hole located in the fourth inorganic insulating layer 228, so that the touch signal 217 may be transmitted to the touch electrode layer 224 through the driving chip, the signal transmission terminal 217, the first transparent conductive layer 226, the second transparent conductive layer 230 and the touch signal trace 229 in sequence, or transmitted to the driving chip through the touch electrode layer 224, the touch signal trace 229, the second transparent conductive layer 230, the first transparent conductive layer 226 and the signal transmission terminal 217, so as to implement a normal touch function. Through additionally arranging the second transparent conductive layer 230, deep holes need to be drilled in the third inorganic insulating layer 227 and the fourth inorganic insulating layer 228 when the touch signal wiring 229 is directly connected with the first transparent conductive layer 226 through the via holes, and the problem that bad connection between different film layers is easily caused by complex deep hole drilling process and deep holes is solved.
Based on the foregoing embodiment, with reference to fig. 12 and fig. 13, the vertical projection of the third inorganic insulating layer 227 on the substrate 225 covers the vertical projection of the touch signal traces 229 on the substrate 225, so that the third inorganic insulating layer 227 can reduce the signal interference between the display function layer 21 and the touch signal traces 229, and can reduce the interference of the display signal to the touch signal as well as the interference of the touch signal to the display signal, thereby ensuring good display effect and touch effect.
On the basis of the above embodiment, fig. 14 is a schematic cross-sectional view of the display panel provided in fig. 4 along the section line F-F', and as shown in fig. 14, the non-display area NAA further includes a packaging area CC surrounding the display area AA and the terminal-disposing area BB; the touch functional layer 22 includes a fifth inorganic insulating layer 231 and a substrate 225, which are located in the package region CC and sequentially disposed on the light-emitting side of the display functional layer 21; the fifth inorganic insulating layer 231 and the fourth inorganic insulating layer 228 are disposed in the same layer and communicate with each other.
Exemplarily, as shown in fig. 14, the non-display area NAA further includes a package area CC surrounding the display area AA and the terminal setting area BB, a package adhesive 24 is disposed in the package area CC, one end of the package adhesive 24 is directly connected to the fifth inorganic insulating layer 231 in the touch functional layer 22, the fifth functional layer 231 and the fourth functional layer 228 are disposed on the same layer, and can be prepared by the same material and synchronous process, which ensures simple film arrangement and simple preparation process in the touch functional layer 22. Therefore, the touch function layer 22 does not have a touch signal trace in the package layer CC, and there is no need to worry about mutual interference between the touch signal and the display signal, so that there is no need to provide a low-density inorganic insulating layer on the same layer as the first inorganic insulating layer 222 in the package region CC, and there is no need to worry about moisture or other impurities in the low-density inorganic insulating layer to perform the display function layer.
Further, one side of the packaging adhesive 24, which is far away from the touch functional layer 21, may also be provided with a reflective layer (not shown in the figure), and the laser used in the curing process of the packaging adhesive 24 is reflected by the reflective layer to enter the packaging adhesive 24 again, so that the laser utilization efficiency is improved.
On the basis of the above embodiments, the first inorganic insulating layer 222 and the second inorganic insulating layer 223 provided in the embodiments of the present invention may be silicon oxide, so that the density of the first inorganic insulating layer 222 is less than that of the second inorganic insulating layer 223. In the embodiment of the present invention, only the first inorganic insulating layer 222 and the second inorganic insulating layer 223 are made of silicon oxide for illustration, and the first inorganic insulating layer 222 and the second inorganic insulating layer 223 may also be made of other materials with different densities after film formation due to different preparation temperatures. Further, the materials of the first inorganic insulating layer 222 and the second inorganic insulating layer 223 may be the same or different, which is not limited in this embodiment of the present invention, and it is only required to ensure that the density of the first inorganic insulating layer 222 is smaller than that of the second inorganic insulating layer 223.
Further, the third inorganic insulating layer 227, the fourth inorganic insulating layer 228, and the fifth inorganic insulating layer 231 may also be all silicon oxide, and the preparation temperature of the third inorganic insulating layer 227 is lower than that of the fourth inorganic insulating layer 228, so that the density of the third inorganic insulating layer 227 is lower than that of the fourth inorganic insulating layer 228.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, fig. 15 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and as shown in fig. 15, the display device 100 includes the display panel 20 according to any embodiment of the present invention, so that the display device 100 provided in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and explanations of structures and terms that are the same as or corresponding to the embodiments are not repeated herein. The display device 100 provided in the embodiment of the present invention may be a mobile phone shown in fig. 15, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A display panel is characterized by comprising a display functional layer and a touch functional layer;
the display panel further comprises a display area, the touch control functional layer comprises a blocking layer, a first inorganic insulating layer, a second inorganic insulating layer, a touch control electrode layer and a substrate, the blocking layer, the first inorganic insulating layer, the second inorganic insulating layer, the touch control electrode layer and the substrate are positioned in the display area and are sequentially arranged on the light emitting side of the display functional layer, and the density of the first inorganic insulating layer is smaller than that of the second inorganic insulating layer;
the vertical projection of the barrier layer on the substrate covers the vertical projection of the first inorganic insulating layer on the substrate;
the display panel further comprises a non-display area positioned on one side of the display area, and the non-display area comprises a terminal setting area;
the touch functional layer comprises a first transparent conductive layer, a third inorganic insulating layer, a fourth inorganic insulating layer, a touch signal wiring and the substrate, wherein the first transparent conductive layer, the third inorganic insulating layer, the fourth inorganic insulating layer, the touch signal wiring and the substrate are positioned in the terminal setting area and are sequentially arranged on the light emitting side of the display functional layer;
the first transparent conductive layer is electrically connected with a signal transmission terminal in the display function layer, and the touch signal wiring and the first transparent conductive layer are electrically connected through via holes in the third inorganic insulating layer and the fourth inorganic insulating layer;
the density of the third inorganic insulating layer is less than that of the fourth inorganic insulating layer, and the vertical projection of the first transparent conductive layer on the substrate base plate covers the vertical projection of the third inorganic insulating layer on the substrate base plate.
2. The display panel according to claim 1, wherein a vertical projection of the first inorganic insulating layer on the base substrate covers a vertical projection of the touch electrode layer on the base substrate.
3. The display panel according to claim 1, wherein the first inorganic insulating layer comprises a first surface on a side close to the base substrate, a second surface on a side far from the base substrate, and a side surface connecting the first surface and the second surface;
the barrier layer comprises a first barrier subsection and a second barrier subsection interconnected;
the first blocking subsection is located on a side of the second surface away from the substrate base plate, and a perpendicular projection of the first blocking subsection on the substrate base plate covers a perpendicular projection of the second surface on the substrate base plate;
the second barrier section covers the side.
4. The display panel according to claim 1, wherein the barrier layer is disposed on the same layer as the first transparent conductive layer, and the barrier layer is disposed in an insulating manner from the first transparent conductive layer;
the third inorganic insulating layer and the first inorganic insulating layer are arranged on the same layer and are not communicated with each other;
the fourth inorganic insulating layer and the second inorganic insulating layer are arranged on the same layer and are communicated with each other;
the touch signal wiring and the touch electrode layer are arranged on the same layer and are electrically connected.
5. The display panel according to claim 1, wherein the touch functional layer further comprises a second transparent conductive layer located in the terminal installation region and between the third inorganic insulating layer and the fourth inorganic insulating layer;
the first transparent conducting layer and the second transparent conducting layer are electrically connected through a via hole in the third inorganic insulating layer, and the second transparent conducting layer and the touch signal routing line are electrically connected through a via hole in the fourth inorganic insulating layer.
6. The display panel of claim 1, wherein a vertical projection of the third inorganic insulating layer on the substrate base plate covers a vertical projection of the touch signal traces on the substrate base plate.
7. The display panel according to claim 1, wherein the first inorganic insulating layer comprises a plurality of bulk insulating structures, and the barrier layer comprises a plurality of bulk barrier structures;
the isolation structures correspond to the insulation structures one to one, and the vertical projection of the isolation structures on the substrate base plate covers the vertical projection of the insulation structures on the substrate base plate.
8. The display panel according to claim 7, wherein the display function layer comprises a plurality of support pillars located in the display area, the support pillars are in one-to-one correspondence with the insulating structures, and a vertical projection of the support pillars on the substrate covers a vertical projection of the insulating structures on the substrate.
9. The display panel according to claim 1, wherein the non-display region further comprises an encapsulation region surrounding the display region and the terminal disposition region;
the touch functional layer comprises a fifth inorganic insulating layer and the substrate base plate, wherein the fifth inorganic insulating layer is positioned in the packaging area and is sequentially arranged on the light emergent side of the display functional layer;
the fifth inorganic insulating layer and the fourth inorganic insulating layer are arranged on the same layer and are communicated with each other.
10. The display panel according to claim 1, wherein a vertical projection of the first inorganic insulating layer on the substrate base plate includes a first edge, and a vertical projection of the barrier layer on the substrate base plate includes a second edge, the second edge being disposed corresponding to the first edge;
and the distance between the first edge and the second edge is L along the direction vertical to the extending direction of the first edge, wherein L is more than or equal to 2 mu m and less than or equal to 5 mu m.
11. The display panel according to claim 1, wherein the first inorganic insulating layer is silicon oxide, wherein the second inorganic insulating layer is silicon oxide, and wherein a preparation temperature of the first inorganic insulating layer is lower than a preparation temperature of the second inorganic insulating layer.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN202010591950.1A CN111769204B (en) | 2020-06-24 | 2020-06-24 | Display panel and display device |
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| CN202010591950.1A CN111769204B (en) | 2020-06-24 | 2020-06-24 | Display panel and display device |
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| JP6975033B2 (en) * | 2017-12-19 | 2021-12-01 | 株式会社ジャパンディスプレイ | Display device |
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