CN216527106U - Touch display panel and display device - Google Patents

Abstract

The utility model discloses a touch display panel and a display device, which aim to solve the problem that display products provided with optical fingerprint identification structures are different in vision. The touch-control display panel, a plurality of fingerprint identification component, the touch-control display panel includes: the touch display device comprises a substrate, a display structure layer and a touch control structure layer, wherein the display structure layer is positioned on one side of the substrate, and the touch control structure layer is positioned on one side of the display structure layer, which deviates from the substrate; the touch control structure layer comprises touch control wiring; the touch display panel further comprises a plurality of openings, at least part of the openings correspond to the fingerprint identification elements, the orthographic projections of the openings on the substrate are located in the orthographic projections of the corresponding fingerprint identification elements on the substrate, and the orthographic projections of the openings on the substrate are separated from the orthographic projections of the touch routing lines on the substrate.

Description

Touch display panel and display device

Technical Field

The utility model relates to the technical field of semiconductors, in particular to a touch display panel and a display device.

Background

Limited by the product requirements of Flexible folding, narrow frame and the like, the touch control structure Layer of an Organic light emitting semiconductor (OLED) adopts a Flexible Multi-Layer cover surface type (FMLOC) structure form, and the Flexible touch control structure Layer is arranged On the packaging Layer of the OLED backplane, so that the OLED backlight has the advantages of being light, thin, foldable and the like. Based on the consideration of reducing resistance, improving sensitivity and the like, the driving electrode (Tx) and the sensing electrode (Rx) in the touch control structure layer are in a Metal Mesh (Metal Mesh) form. Compared with a touch electrode formed by adopting a transparent conductive material (such as Indium Tin Oxide, ITO for short), the metal grid has the advantages of small resistance, small thickness, high reaction speed and the like.

In the present display product that is provided with optics fingerprint identification structure, the touch-control metal that fingerprint identification position and non-fingerprint identification position set up walks the line and dredge the leakproofness different, leads to touch-control metal to walk the line reflection intensity difference, can form obvious difference in the vision, reduces product property ability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a touch display panel and a display device, which aim to solve the problem that display products provided with optical fingerprint identification structures are different in vision.

An embodiment of the present invention provides a touch display panel having a plurality of fingerprint identification elements, the touch display panel including: the touch display device comprises a substrate, a display structure layer and a touch control structure layer, wherein the display structure layer is positioned on one side of the substrate; the touch control structure layer comprises touch control wiring;

the touch display panel further comprises a plurality of openings, at least part of the openings correspond to the fingerprint identification elements, the orthographic projections of the openings on the substrate base plate are located in the orthographic projections of the corresponding fingerprint identification elements on the substrate base plate, and the orthographic projections of the openings on the substrate base plate are separated from the orthographic projections of the touch routing wires on the substrate base plate.

In one possible embodiment, the opening extends through the light-shielding film layers on the side of the fingerprint identification element facing away from the substrate base plate.

In one possible implementation, the display structure layer has a plurality of pixels;

the pixels form a plurality of pixel rows extending along a first direction; at least part of the openings are positioned between two adjacent pixels of the pixel row, and the openings of the adjacent pixel rows are distributed in a staggered mode.

In a possible embodiment, 2 to 5 pixels are spaced between two adjacent openings in the same pixel row.

In a possible embodiment, the largest dimension of the opening is smaller than the smallest dimension of the pixel.

In a possible implementation manner, the orthographic projection of the touch traces on the substrate base plate forms a plurality of annular patterns, and the opening is located in the center of the annular patterns.

In one possible implementation, the touch trace includes a driving trace, a sensing trace, and a floating trace;

the driving trace is separated from the sensing trace; the floating trace is separated from the driving trace; the floating trace is separated from the sensing trace.

In a possible embodiment, the orthogonal projection of the opening on the substrate base plate is a circle, an ellipse, a triangle, a rectangle, a pentagon, or a hexagon.

In a possible implementation manner, the fingerprint identification element comprises a first photosensitive electrode, a first semiconductor layer and a second photosensitive electrode which are sequentially stacked on one side of the substrate base plate.

In a possible implementation manner, the fingerprint identification elements are integrated in the display structure layer, and a plurality of the fingerprint identification elements are uniformly distributed on the touch display panel;

the opening penetrates through the shading film layers on one side, away from the first photosensitive electrode, of the first semiconductor layer.

In a possible embodiment, a plurality of said fingerprint recognition elements are located only in the first area;

part of the openings are positioned in the first area, and the rest of the openings are positioned in the area outside the first area.

In a possible embodiment, an orthographic projection of the opening in the first region on the substrate base is located within an orthographic projection of the fingerprint identification element on the substrate base;

and the opening is positioned in a gap between two adjacent pixels in the area except the first area.

In a possible implementation manner, the opening in the first region penetrates through each light-shielding film layer on the side of the first semiconductor layer, which faces away from the first photosensitive electrode; the openings outside the first area penetrate through the display structure layer and the light-shading film layer of the touch layer.

In one possible embodiment, the openings are the same size.

The embodiment of the utility model also provides a display device, which comprises the touch display panel provided by the embodiment of the utility model.

The embodiment of the utility model has the following beneficial effects: in the embodiment of the utility model, at least part of the film layer in the area between the adjacent pixels is provided with the opening, the orthographic projection of the opening on the substrate and the orthographic projection of the touch wiring on the substrate are not overlapped, namely, the touch wiring is not arranged at the position where the opening is arranged, thus, the opening is arranged in the area for displaying, the problem of visual difference of the touch display panel when the opening is dug in only part of the area is avoided, in addition, at least part of the opening corresponds to the fingerprint identification element, and the orthographic projection of the opening on the substrate is positioned in the orthographic projection of the corresponding fingerprint identification element on the substrate, so that the light incident quantity of the fingerprint identification element can be improved, and the accurate identification of the fingerprint by the touch display panel is realized.

Drawings

FIG. 1 is a schematic diagram of a distribution of openings provided in an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a touch display panel according to an embodiment of the utility model;

FIG. 3A is a second schematic view of the distribution of the openings provided in the embodiment of the present invention;

FIG. 3B is a third schematic view of the distribution of openings provided in the embodiment of the present invention;

fig. 4 is a second schematic cross-sectional view of a touch display panel according to an embodiment of the utility model;

fig. 5 is a schematic top view of a touch display panel according to an embodiment of the utility model;

fig. 6 is a second schematic top view of a touch display panel according to an embodiment of the utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

Referring to fig. 1 and 2, an embodiment of the utility model provides a touch display panel having a plurality of fingerprint identification devices S, the touch display panel including: the touch display device comprises a substrate 1, a display structure layer 2 positioned on one side of the substrate 1, and a touch control structure layer 3 positioned on one side, away from the substrate 1, of the display structure layer 2; the touch structure layer 3 includes a touch trace 31;

the touch display panel further includes a plurality of openings K1, at least a portion of the openings K1 corresponds to the fingerprint identification element S, an orthogonal projection of the opening K1 on the substrate base 1 is located in an orthogonal projection of the corresponding fingerprint identification element S on the substrate base 1, an orthogonal projection of the opening K1 on the substrate base 1 is separated from an orthogonal projection of the touch trace 31 on the substrate base 1, and specifically, an orthogonal projection of the opening K1 on the substrate base 1 and an orthogonal projection of the touch trace 31 on the substrate base 1 are not overlapped with each other.

In the embodiment of the utility model, at least part of the film layer in the area between the adjacent pixels 21 is provided with the opening K1, the orthographic projection of the opening K1 on the substrate base plate 1 and the orthographic projection of the touch trace 31 on the substrate base plate 1 are not overlapped, that is, the touch trace 31 is not arranged at the position where the opening K1 is arranged, so that the openings K1 are arranged in the areas for displaying, and the problem that the touch display panel has visual difference when holes are dug only in part of the areas is avoided, moreover, at least part of the opening K1 corresponds to the fingerprint identification element S, and the orthographic projection of the opening K1 on the substrate base plate 1 is positioned in the orthographic projection of the corresponding fingerprint identification element S on the substrate base plate 1, so that the light entering amount of the fingerprint identification element S can be increased, and the touch display panel can realize accurate identification of fingerprints.

In a specific implementation, since the light-shielding film layer in the touch display panel may cause the display difference between the opened area and the non-opened area, in a possible implementation, the opening K1 penetrates through the light-shielding film layers on the side of the fingerprint identification device S away from the substrate 1, so as to improve the visual difference problem of the touch display panel. Specifically, the opening K1 may also penetrate through the non-light-shielding film layer on the side of the fingerprint identification device S away from the substrate 1. Specifically, the light-blocking film layer may be understood as a film layer having a light transmittance of 50% or less. Specifically, as shown in fig. 2, the light-shielding film layer may include, for example, a black matrix H between adjacent pixels 21.

In one possible implementation, as shown in fig. 1, the display structure layer 2 has a plurality of pixels 21, where the plurality of pixels 21 may specifically include a red pixel 211, a blue pixel 212, and a green pixel 213, and the pixels 21 form a plurality of pixel rows X extending along a first direction a 1; at least part of the openings K1 are located between two adjacent pixels 21 of the pixel row X, and the openings K1 of the adjacent pixel row X are distributed with a shift. Specifically, for example, as shown in fig. 1, the pixels 21 form a plurality of pixel rows X extending along the first direction, including a first pixel row X1, a second pixel row X2, a third pixel row X3, and a fourth pixel row X4 from top to bottom; in the first pixel row X1, the opening K1 is located between two adjacent pixels 21; the first pixel row X1 and the first via hole K1 of the second pixel row X2 are distributed in a staggered manner, that is, a center line Y1 passing through the center of the first via hole K1 and perpendicular to the first direction a1 in the first pixel row X1 does not coincide with a center line Y2 passing through the center of the first via hole K1 and perpendicular to the first direction a1 in the second pixel row X2.

Specifically, the pixel 21 is an effective light emitting region of an organic light emitting device, or an opening of a pixel defining layer.

In specific implementation, the opening K1 may be provided between some adjacent pixels 21, or the opening K1 may be provided between all adjacent pixels 21. In one possible embodiment, in the same pixel row X, two adjacent openings are spaced by 2-5 pixels 21. For example, as shown in fig. 1, four pixels 21 are spaced between two adjacent openings K1, and as shown in fig. 3A and 3B, two pixels 21 are spaced between two adjacent openings K1.

Specifically, a line perpendicular to the first direction a1 and passing through the center of the opening K1 is taken as a first center line, and 1 to 3 pixels 21 may be spaced between two adjacent openings K1 where the first center lines coincide, for example, as shown in fig. 1, the first center line of the first opening K1 on the left side of the first pixel row X1 coincides with the first center line of the first opening K1 on the left side of the third pixel row X3, and 1 to 3 pixels 21 are spaced between the two openings K1, specifically, 1 pixel 21 is spaced between the two openings K1.

In one possible embodiment, the largest dimension of the opening K1 is smaller than the smallest dimension of the pixel 21. Therefore, the display effect of the display panel is prevented from being influenced by the overlarge opening K1. In particular, the maximum dimension of the opening K1 is understood to be the maximum distance between two points on the edge of the opening K1, for example, the opening K1 is circular and the maximum dimension of the opening K1 is understood to be the diameter of the circle.

In one possible embodiment, the maximum dimension of the openings K1 is between 2 μm and 10 μm.

Specifically, as shown in fig. 1, the orthographic projection of the touch trace 31 on the substrate 1 forms a plurality of annular patterns E, and the opening K1 is located at the center of the annular patterns E. Specifically, the annular pattern E may include two hexagonal patterns, each of which exposes one pixel 21. Specifically, the annular pattern E may be an unclosed pattern, and the outer contour as a whole may be a ring-shaped pattern.

Specifically, the touch structure layer 3 may include a driving trace 311, a sensing trace 312, and a floating trace 313(314), wherein the driving trace 311 is separated from the sensing trace 312, that is, the two are disconnected from each other; the floating trace 313(314) is separated from the driving trace 311, and the floating trace 313(314) is separated from the sensing trace 312. The driving trace 311 may form a plurality of driving electrode blocks arranged along the first direction a1, and the same plurality of driving electrodes arranged along the first direction a1 form a driving electrode strip; the sensing trace 312 may form a plurality of sensing electrode blocks sequentially arranged along a direction perpendicular to the first direction a1, the same plurality of sensing electrodes arranged along a direction perpendicular to the first direction a1 form a sensing electrode strip, and the driving electrode strip and the sensing electrode strip are cross-insulated. The floating traces 313(314) can include a drive floating trace 313 located within a drive electrode block and a sense floating trace 314 located within a sense electrode block. The floating traces 313(314) may be specifically understood as traces that are not loaded with electrical signals.

In one possible embodiment, the orthographic projection of the opening K1 on the substrate base plate 1 is circular, oval, triangular, rectangular, pentagonal, or hexagonal.

In one possible embodiment, referring to fig. 4, the fingerprint recognition element S includes a first photosensitive electrode 271, a first semiconductor layer 273 (which may specifically include a P-type semiconductor layer, an N-type semiconductor layer, and an intrinsic semiconductor layer between the P-type semiconductor layer and the N-type semiconductor layer), and a second photosensitive electrode 272, which are sequentially stacked on one side of the substrate base plate 1.

In one possible embodiment, referring to fig. 4 and 5, the fingerprint identification devices S are integrated in the display structure layer 2, and a plurality of fingerprint identification devices S are uniformly distributed on the touch display panel; the opening K1 penetrates through each light-shielding film layer on the side of the semiconductor layer 273 facing away from the first photosensitive electrode 271. In fig. 4, the opening K1 is illustrated as penetrating through all the film layers on the side of the semiconductor layer 273 away from the first photosensitive electrode 271, and in practical implementation, the opening K1 may only penetrate through each light-shielding film layer on the side of the semiconductor layer 273 away from the first photosensitive electrode 271.

Specifically, the opening K1 corresponds to the fingerprint recognition element S, and may be the opening K1 corresponding to the fingerprint recognition element S one to one, as shown in fig. 5; specifically, opening K1 corresponds to fingerprint recognition element S, and a plurality of openings K1 may correspond to one fingerprint recognition element S. Specifically, the plurality of fingerprint identification elements S are uniformly distributed on the touch display panel, which can be understood as that the plurality of fingerprint identification elements S are substantially uniformly distributed on the touch display panel, that is, the first fingerprint identification element S is provided on the full screen, and the touch display panel can realize full screen fingerprint identification.

Specifically, as shown in fig. 4, the display structure layer 2 may specifically include a plurality of fingerprint identification elements S, a first type thin film transistor T electrically connected to the plurality of fingerprint identification elements S, a light emitting device, and a second type thin film transistor electrically connected to the light emitting device. Specifically, the light emitting device may include an anode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, and a cathode layer.

Specifically, as shown in fig. 4, the thin film transistor T of the first type may include an active layer 22 (specifically, may include a conductive source region 221, a conductive drain region 222, and a channel region 223 between the conductive source region 221 and the conductive drain region 222), a gate insulating layer 23, a gate 24, a first insulating layer 25, a source/drain (specifically, may include a source 261 and a drain 262), a second insulating layer 281, a third insulating layer 282, and a fourth insulating layer 283, which are stacked on one side of the substrate 1 in sequence. Specifically, the touch display panel may further include a connection electrode 29 located between the third insulating layers 282 and electrically connected to the second photosensitive electrode 272 through a hole, and the fourth insulating layer 283. A buffer layer 21 may also be disposed between the first type thin film transistor T and the substrate base plate 1.

In one possible embodiment, referring to FIG. 6, the plurality of fingerprint recognition elements S are located only in the first zone Z, with some of the openings K1 being located in the first zone Z and the remaining openings K1 being located in a region other than the first zone Z. For the touch display panel only through carrying out fingerprint identification at first region Z, the region outside first region Z sets up trompil K1, and set up the position of trompil K1 and not be provided with touch-control and walk line 31, can avoid only carrying out fingerprint identification' S first region Z and punch and place fingerprint identification component (including a plurality of fingerprint identification components S) to and when touch-control that first region Z set up walks line 31 less, lead to being used for carrying out the regional light transmissivity and the reflection light nature difference outside first region Z of fingerprint identification, cause the problem of visual difference.

In one possible embodiment, as shown in fig. 6, the orthographic projection of the opening K1 in the first zone Z on the base substrate 1 is located within the orthographic projection of the fingerprint identification element S on the base substrate 1; in the region other than the first region Z, the opening K1 is located in the gap between two adjacent pixels 21.

Specifically, the structure of the fingerprint identification device S may be the same as that of the fingerprint identification device S, specifically, the opening K1 in the first region Z penetrates through each light-shielding film layer on the side of the semiconductor layer 273 away from the first photosensitive electrode 271; the opening K1 outside the first region Z penetrates through the display structure layer 2 and the light-shielding film layer of the touch layer 3. For the touch display panel that performs fingerprint identification only in the first region Z, the first region Z may not be provided with pixels, the film layer structure may not be the same as the film layer configuration outside the first region Z, and the film layer through which the opening K1 in the first region Z and the opening K2 outside the first region Z penetrate may also be different.

Specifically, the size of each opening K1 may be the same. Therefore, the manufacturing process of the touch display panel can be simplified.

Based on the same utility model concept, the embodiment of the utility model further provides a display device, which comprises the touch display panel provided by the embodiment of the utility model.

The embodiment of the utility model has the following beneficial effects: in the embodiment of the utility model, at least part of the film layer in the area between the adjacent pixels 21 is provided with the opening K1, the orthographic projection of the opening K1 on the substrate base plate 1 and the orthographic projection of the touch trace 31 on the substrate base plate 1 are not overlapped, that is, the touch trace 31 is not arranged at the position where the opening K1 is arranged, so that the openings K1 are arranged in the areas for displaying, and the problem that the touch display panel has visual difference when holes are dug only in part of the areas is avoided, moreover, at least part of the opening K1 corresponds to the fingerprint identification element S, and the orthographic projection of the opening K1 on the substrate base plate 1 is positioned in the orthographic projection of the corresponding fingerprint identification element S on the substrate base plate 1, so that the light entering amount of the fingerprint identification element S can be increased, and the touch display panel can realize accurate identification of fingerprints.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (15)

1. A touch display panel having a plurality of fingerprint identification elements, the touch display panel comprising: the touch display device comprises a substrate, a display structure layer and a touch control structure layer, wherein the display structure layer is positioned on one side of the substrate; the touch control structure layer comprises touch control wiring;

the touch display panel further comprises a plurality of openings, at least part of the openings correspond to the fingerprint identification elements, the orthographic projections of the openings on the substrate base plate are located in the orthographic projections of the corresponding fingerprint identification elements on the substrate base plate, and the orthographic projections of the openings on the substrate base plate are separated from the orthographic projections of the touch routing wires on the substrate base plate.

2. The touch display panel of claim 1, wherein the opening extends through each light-blocking film layer on a side of the fingerprint identification device facing away from the substrate.

3. The touch display panel of claim 1, wherein the display structure layer has a plurality of pixels;

the pixels form a plurality of pixel rows extending along a first direction; at least part of the openings are positioned between two adjacent pixels of the pixel row, and the openings of the adjacent pixel rows are distributed in a staggered mode.

4. The touch display panel of claim 3, wherein 2 to 5 pixels are spaced between two adjacent openings in the same pixel row.

5. The touch display panel of claim 4, wherein a maximum dimension of the opening is less than a minimum dimension of the pixel.

6. The touch display panel according to claim 5, wherein the orthographic projection of the touch traces on the substrate base plate forms a plurality of annular patterns, and the opening is located at the center of the annular patterns.

7. The touch display panel according to claim 6, wherein the touch traces include driving traces, sensing traces, and floating traces;

the driving trace is separated from the sensing trace; the floating trace is separated from the driving trace; the floating trace is separated from the sensing trace.

8. The touch display panel of claim 5, wherein the orthographic projection of the opening on the substrate base plate is circular, elliptical, triangular, rectangular, pentagonal or hexagonal.

9. The touch display panel according to any one of claims 3 to 8, wherein the fingerprint identification device comprises a first photosensitive electrode, a first semiconductor layer and a second photosensitive electrode, which are sequentially stacked on one side of the substrate.

10. The touch display panel of claim 9, wherein the fingerprint recognition elements are integrated in the display structure layer, and a plurality of the fingerprint recognition elements are uniformly distributed on the touch display panel;

the opening penetrates through the shading film layers on one side, away from the first photosensitive electrode, of the first semiconductor layer.

11. The touch display panel of claim 9, wherein the fingerprint recognition elements are located only in the first area;

part of the openings are located in the first area, and the rest of the openings are located in the area outside the first area.

12. The touch display panel of claim 11, wherein an orthographic projection of the opening in the first area on the substrate is within an orthographic projection of the fingerprint identification element on the substrate;

and the opening is positioned in a gap between two adjacent pixels in the area except the first area.

13. The touch display panel of claim 12, wherein the opening in the first area penetrates each light-shielding film layer on a side of the first semiconductor layer away from the first photosensitive electrode; the openings outside the first area penetrate through the display structure layer and the light-shading film layer of the touch layer.

14. The touch display panel of claim 12, wherein the openings are the same size.

15. A display device comprising the touch display panel according to any one of claims 1 to 14.

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