Display panel and display device

Abstract

The invention provides a display panel and a display device, and the display panel comprises a substrate; the light-emitting elements are positioned on one side of the substrate; the light-emitting element comprises a light-emitting material and reflective metal coating the light-emitting material; the plurality of touch units are positioned between the substrate and the light-emitting element, and the plurality of touch units are mutually insulated; wherein the at least one touch unit is electrically connected with the at least one reflective metal. The touch recognition accuracy of the display panel can be improved, and the reliability of the display panel is improved.

Description

Technical Field

[0001] The present invention relates to the field of display panels, and in particular to a display panel and a display device. Background Art

[0002] With the rapid development of display technology, LED displays have gradually become one of the important choices in the field of high-end displays due to their advantages such as high brightness, wide color gamut, and low power consumption. In order to reduce the thickness of the panel, existing LED displays usually adopt an in-cell touch layer design when implementing touch functions. However, since the touch unit in the in-cell touch layer is far away from the finger touch position of the display panel, the touch recognition accuracy is low. Summary of the invention

[0003] In view of this, the present invention provides a display panel and a display device to at least solve the problem of low touch recognition accuracy of the display panel.

[0004] In one aspect, an embodiment of the present invention provides a display panel, comprising: a base substrate; a plurality of light-emitting elements, the light-emitting elements being located on one side of the base substrate; the light-emitting elements comprising a light-emitting material and a reflective metal coating the light-emitting material; a plurality of touch-control units, the touch-control units being located between the base substrate and the light-emitting elements, the plurality of touch-control units being insulated from each other; wherein at least one touch-control unit is electrically connected to at least one reflective metal.

[0005] On the other hand, an embodiment of the present invention further provides a display device, comprising the above-mentioned display panel.

[0006] The display panel and the display device of the present invention realize an embedded touch layer by arranging the touch unit between the base substrate and the light-emitting element along the thickness direction of the display panel, thereby reducing the thickness of the display panel; and because the reflective metal is closer to the touch position of the user's finger than the touch unit, the reflective metal is electrically connected to the touch unit and the light-emitting element, so that the reflective metal becomes an extension of the touch unit along the thickness direction of the display panel, thereby reducing the height difference between the touch unit and the touch position of the user's finger, thereby improving the touch recognition accuracy of the display panel and increasing the reliability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of a cross-sectional structure of a display panel in the thickness direction in the related art;

[0008] Figure 2 is a schematic diagram of a cross-sectional structure in the thickness direction of a display panel provided by an embodiment of the present invention;

[0009] Figure 3 is a schematic diagram of a cross-sectional structure in the thickness direction of another display panel provided by an embodiment of the present invention;

[0010] Figure 4 is a schematic diagram of a top view structure of a touch control unit provided by an embodiment of the present invention;

[0011] Figure 5 is a schematic diagram of a top view structure of a first touch electrode provided by an embodiment of the present invention;

[0012] Figure 6 is a schematic diagram of a top view structure of a second touch electrode provided by an embodiment of the present invention;

[0013] Figure 7 is a Figure 4 A-A' cross-sectional schematic diagram;

[0014] Figure 8 is a Figure 4 Schematic diagram of the cross section along line B-B';

[0015] Fig. 9 yes Figure 7 A top view of

[0016] Fig.10 yes Figure 8 A top view of

[0017] Fig.11 is another Figure 4 A-A' cross-sectional schematic diagram;

[0018] Fig.12 is another Figure 4 Schematic diagram of the cross section along line B-B';

[0019] Fig.13 yes Fig.11 A top view of

[0020] Fig.14 yes Fig.12 A top view of

[0021] Fig.15 is a schematic diagram of a top view of another touch control unit provided by an embodiment of the present invention;

[0022] Fig.16 A schematic diagram of a top view structure of a third touch electrode provided by an embodiment of the present invention;

[0023] Fig.17 yes Fig.16 Schematic diagram of the cross section along C-C';

[0024] Fig.18 yes Fig.17 A top view of

[0025] Fig.19It is a structural schematic diagram of a display device provided by an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Display panel;

[0028] 10. Base substrate;

[0029] 20. Light-emitting element;

[0030] 21. Luminescent materials;

[0031] 22. Reflective metal;

[0032] 221, protrusion;

[0033] 23. Cathode;

[0034] 24. Anode;

[0035] 30. Touch unit;

[0036] 31. A first touch unit;

[0037] 311, a first touch electrode;

[0038] 3111, a first auxiliary electrode;

[0039] 3112, first routing;

[0040] 32. A second touch unit;

[0041] 321, second touch electrode;

[0042] 3211, a second auxiliary electrode;

[0043] 3212, second routing;

[0044] 331, a third touch electrode;

[0045] 3311, a third auxiliary electrode;

[0046] 3312, the third route;

[0047] 40. Insulation layer;

[0048] 41. First via;

[0049] 50. Cover plate;

[0050] M1, first metal layer;

[0051] M2, second metal layer;

[0052] M3, third metal layer;

[0053] X, first direction;

[0054] Y, second direction;

[0055] 200. Display device. DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0057] The words "first", "second" and the like used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" are based on the orientation or position relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0058] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0059] In order to reduce the thickness of the panel, existing LED displays usually adopt an in-cell touch layer design when implementing the touch function. However, since the touch unit in the in-cell touch layer is far away from the finger touch position of the display panel, the touch recognition accuracy is low.

[0060] like Figure 1 As shown, a display panel 300 in the related art includes a base substrate 10, a plurality of touch units 30, a plurality of light-emitting elements 20 and a cover plate 50 arranged in sequence along the thickness direction. The light-emitting element 20 includes a light-emitting material 21 and a reflective metal 22 covering the light-emitting material 21. Since the touch unit 30 is located between the base substrate 10 and the light-emitting element 20, the distance between the user's finger and the touch unit 30 is H1. As a result, the touch unit 30 is far away from the finger touch position of the display panel 300, and the touch recognition accuracy is low.

[0061] The inventor of this case has provided a solution to the problems existing in the prior art through careful and in-depth research. The present invention provides a display panel and a display device, wherein the display panel includes: a substrate; a plurality of light-emitting elements, the light-emitting elements are located on one side of the substrate; the light-emitting elements include a light-emitting material and a reflective metal covering the light-emitting material; a plurality of touch units, the touch units are located on the side of the substrate facing the light-emitting elements, and the plurality of touch units are insulated from each other; wherein at least one touch unit is electrically connected to at least one reflective metal. The display panel and the display device of the present invention realize an embedded touch layer by arranging the touch unit between the substrate and the light-emitting element along the thickness direction of the display panel, thereby reducing the thickness of the display panel; and because the reflective metal is closer to the touch position of the user's finger than the touch unit, by electrically connecting the touch unit to the reflective metal of the light-emitting element, the reflective metal becomes an extension of the touch unit along the thickness direction of the display panel, thereby reducing the height difference between the touch unit and the touch position of the user's finger, thereby improving the touch recognition accuracy of the display panel and increasing the reliability of the display panel.

[0062] The above is the core idea of ​​the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0063] like Figure 2 As shown, in one aspect, an embodiment of the present invention provides a display panel 100 including a base substrate 10 , a plurality of light emitting elements 20 and a plurality of touch control units 30 .

[0064] Specifically, the light emitting element 20 is located on one side of the base substrate 10. The light emitting element 20 includes a light emitting material 21 and a reflective metal 22 covering the light emitting material 21. The light emitting material 21 can be used to emit red, blue and green light when powered on, and emit along the light emitting surface of the display panel 100. The reflective metal 22 is used to converge the light emitted by the light emitting material 21 so that it is emitted along the light emitting surface of the display panel 100 as much as possible.

[0065] Specifically, the touch control unit 30 is located between the base substrate 10 and the light emitting element 20. It should be noted that the touch control unit 30 is located between the base substrate 10 and the light emitting element 20, which means that along the thickness direction of the display panel 100, the level of the touch control unit 30 is located between the base substrate 10 and the light emitting element 20, and it does not mean that the absolute height of the touch control unit 30 must be located between the base substrate 10 and the light emitting element 20. The multiple touch control units 30 are insulated from each other, thereby forming a coupling capacitor for detecting the user's touch screen position and providing a touch function for the display panel 100. By setting the touch control unit 30 between the base substrate 10 and the light emitting element 20 along the thickness direction of the display panel 100, an embedded touch layer is realized, thereby reducing the thickness of the display panel 100.

[0066] Among them, at least one touch unit 30 is electrically connected to at least one reflective metal 22. Because the reflective metal 22 is closer to the touch position of the user's finger than the touch unit 30, by electrically connecting the touch unit 30 to the reflective metal 22 of the light emitting element 20, the reflective metal 22 becomes an extension of the touch unit 30 along the thickness direction of the display panel 100, so that the height difference between the touch unit 30 and the touch position of the user's finger can be reduced, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0067] Furthermore, since the touch control unit 30 does not cover all positions of the display area of ​​the display panel 100, some of the light emitting elements 20 do not overlap with the touch control unit 30 in the direction perpendicular to the plane where the display panel 100 is located, so that the reflective metal 22 of these light emitting elements 20 is not electrically connected to the touch control unit 30. In addition, the size of the touch control unit 30 is larger than that of the light emitting element 20, and in the direction perpendicular to the plane where the display panel 100 is located, the same touch control unit 30 can overlap with multiple light emitting elements 20, and the same touch control unit 30 can be electrically connected to the reflective metal 22 of only some of the light emitting elements 20, and the present application does not impose any restrictions on this.

[0068] Optionally, multiple touch units 30 are electrically connected to the reflective metal 22, wherein each touch unit 30 is electrically connected to multiple reflective metals 22, so as to reduce the height difference between the touch unit 30 and the touch position of the user's finger at the multiple light-emitting elements 20, and increase the area of ​​the touch area of ​​the display panel 100 occupied by the structure where the touch unit 30 is electrically connected to the reflective metal 22, thereby further improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0069] like Figure 3As shown, in some embodiments, the reflective metal 22 is at least located on the side wall of the light emitting element 20, and is used to reflect the light emitted from the light emitting element 20 to the side, and after converging, the light is emitted as much as possible along the light emitting surface of the display panel 100. In addition, the above arrangement can also facilitate the electrical connection between the reflective metal 22 and the touch unit 30 located at the bottom of the light emitting element 20. The material of the reflective metal 22 includes a metal with high reflectivity such as aluminum, and the present application does not limit this.

[0070] Continue to refer Figure 3 Further, the display panel 100 further includes a cover plate 50, which is disposed on the side of the light emitting element 20 away from the base substrate 10. The user touches the cover plate 50 and forms a coupling capacitor with the touch unit 30, so that the display panel 100 detects the user's touch position. The reflective metal 22 includes a protrusion 221 protruding toward one side of the base substrate 10, and the reflective metal 22 is electrically connected to the touch unit 30 through the protrusion 221.

[0071] Continue to refer Figure 1 and Figure 3 , in the related art or in the present application, the touch unit 30 is not electrically connected to the reflective metal 22. Since the touch unit 30 is located between the base substrate 10 and the light-emitting element 20, the distance between the user's finger and the touch unit 30 is H1. In the present application, the touch unit 30 is electrically connected to the reflective metal 22, and the distance between the user's finger and the touch unit 30 is H2. Among them, H1>H2. Therefore, the present application can greatly reduce the height difference between the touch unit 30 and the touch position of the user's finger, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100. Specifically, the height difference reduced by the present application is the sum of the heights of the reflective metal 22 and the protrusion 221 along the thickness direction of the display panel 100.

[0072] like Figure 4 As shown, in some alternative embodiments, the touch control unit 30 includes a plurality of first touch control units 31 arranged along a first direction X and a plurality of second touch control units 32 arranged along a second direction Y, and the first direction X and the second direction Y intersect. Among them, the first direction X can be perpendicular to the second direction Y, and the present application does not limit this. Specifically, the first touch control unit 31 and the second touch control unit 32 are insulated from each other. That is, in these embodiments, the display panel 100 can be a mutual capacitive touch panel. In a mutual capacitive touch panel, the first touch control unit 31 and the second touch control unit 32 of the display panel 100 can be a driving electrode and a sensing electrode, respectively, and a mutual capacitance is coupled between the driving electrode and the sensing electrode. When a finger touches the display panel 100, it can be equivalent to a change in the mutual capacitance, thereby changing the detection signal of the sensing electrode end, so that the display panel 100 detects whether the finger touches the display panel 100 and the position of the touch.

[0073] Specifically, the length of the first touch control unit 31 along the first direction X covers the width of the touch control area of ​​the entire display panel 100, and the total length of the plurality of first touch control units 31 along the second direction Y covers the height of the touch control area of ​​the entire display panel 100, so that the first touch control unit 31 covers the entire touch control area as much as possible. It is worth noting that, due to the gaps between the first touch control units 31, the plurality of first touch control units 31 do not completely cover the entire touch control area. Similarly, the configuration of the second touch control unit 32 is similar to that of the first touch control unit 31, and will not be repeated here.

[0074] Further, at least one first touch unit 31 or at least one second touch unit 32 is electrically connected to at least one reflective metal 22. The position where the first touch unit 31 or the second touch unit 32 of the present application is electrically connected to the reflective metal 22 can greatly reduce the height difference between the first touch unit 31 or the second touch unit 32 and the position touched by the user's finger, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0075] Optionally, multiple first touch units 31 and multiple second touch units 32 are electrically connected to the reflective metal 22, respectively, wherein each first touch unit 31 and each second touch unit 32 are electrically connected to multiple reflective metals 22, respectively, so as to reduce the height difference between the first touch unit 31 and the second touch unit 32 and the touch position of the user's finger at the multiple light-emitting elements 20, and increase the area of ​​the touch area of ​​the display panel 100 occupied by the structure where the touch unit 30 is electrically connected to the reflective metal 22, thereby further improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0076] Continue to refer Figure 4 In some embodiments, the first touch unit 31 includes a plurality of first touch electrodes 311, and the first touch electrodes 311 in the same first touch unit 31 are arranged along the first direction X and are electrically connected to each other; the second touch unit 32 includes a plurality of second touch electrodes 321, and the second touch electrodes 321 in the same second touch unit 32 are arranged along the second direction Y and are electrically connected to each other.

[0077] Specifically, the total length of the first touch electrodes 311 along the first direction X covers the width of the touch area of ​​the entire display panel 100, and the total length of the first touch electrodes 311 along the second direction Y covers the height of the touch area of ​​the entire display panel 100, so that the first touch electrodes 311 cover the entire touch area as much as possible. It is worth noting that due to the gaps between the first touch electrodes 311, the first touch electrodes 311 do not completely cover the entire touch area. Similarly, the configuration of the second touch electrodes 321 is similar to that of the first touch electrodes 311, and will not be repeated here.

[0078] Further, at least one first touch electrode 311 or at least one second touch electrode 321 is electrically connected to at least one reflective metal 22. The position where the first touch electrode 311 or the second touch electrode 321 of the present application is electrically connected to the reflective metal 22 can greatly reduce the height difference between the first touch electrode 311 or the second touch electrode 321 and the position touched by the user's finger, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0079] Optionally, multiple first touch electrodes 311 and multiple second touch electrodes 321 are electrically connected to the reflective metal 22, respectively, wherein each first touch electrode 311 and each second touch electrode 321 are electrically connected to multiple reflective metals 22, respectively, so as to reduce the height difference between the first touch electrodes 311 and the second touch electrodes 321 and the touch position of the user's finger at multiple light-emitting elements 20, increase the area of ​​the touch region of the display panel 100 occupied by the structure where the touch unit 30 is electrically connected to the reflective metal 22, that is, reduce the height difference between the touch unit 30 and the touch position of the user's finger as much as possible at multiple locations, thereby further improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0080] like Figure 5 and Figure 6 As shown, in some embodiments, the first touch electrode 311 includes a plurality of first auxiliary electrodes 3111, and each first auxiliary electrode 3111 in the same first touch electrode 311 is electrically connected. A plurality of first auxiliary electrodes 3111 electrically connected to each other constitute a first touch electrode 311, and a plurality of first touch electrodes 311 arranged along the first direction X are electrically connected to each other, and constitute a first touch unit 31. The second touch electrode 321 includes a plurality of second auxiliary electrodes 3211, and each second auxiliary electrode 3211 in the same second touch electrode 321 is electrically connected. A plurality of second auxiliary electrodes 3211 electrically connected to each other constitute a second touch electrode 321, and a plurality of second touch electrodes 321 arranged along the second direction Y are electrically connected to each other, and constitute a second touch unit 32.

[0081] Further, each first auxiliary electrode 3111 and each second auxiliary electrode 3211 respectively correspond to a light emitting element 20, and at least one first auxiliary electrode 3111 and at least one second auxiliary electrode 3211 are respectively electrically connected to a reflective metal 22. That is, the first auxiliary electrode 3111 and the second auxiliary electrode 3211 are close in size to the light emitting element 20, and the present application reduces the height difference between the touch unit 30 and the position touched by the user's finger by electrically connecting the first auxiliary electrode 3111 and the second auxiliary electrode 3211 to the reflective metal 22, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0082] In some embodiments, each first auxiliary electrode 3111 and each second auxiliary electrode 3211 are electrically connected to a reflective metal 22. That is, the first touch electrode 311 and the second touch electrode 321 are electrically connected to the emitting metal of each light-emitting element 20 overlapped therewith. The above arrangement can further increase the area of ​​the touch area of ​​the display panel 100 occupied by the structure where the touch unit 30 is electrically connected to the reflective metal 22, that is, reduce the height difference between the touch unit 30 and the position touched by the user's finger at as many places as possible, thereby further improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0083] like Figure 7 and Figure 8 As shown, in some alternative embodiments, the display panel 100 further includes: a first metal layer M1 and a second metal layer M2. The first metal layer M1 is located between the base substrate 10 and the light-emitting element 20. The second metal layer M2 is located between the first metal layer M1 and the light-emitting element 20. It should be noted that the first metal layer M1 is located between the base substrate 10 and the light-emitting element 20, which means that along the thickness direction of the display panel 100, the level of the first metal layer M1 is located between the base substrate 10 and the light-emitting element 20, and does not mean that the absolute height of the first metal layer M1 must be located between the base substrate 10 and the light-emitting element 20. The second metal layer M2 is similar, and will not be described here.

[0084] Further, the second metal layer M2 includes a plurality of first touch control units 31 and a plurality of second touch control units 32. That is, the first auxiliary electrode 3111 and the second auxiliary electrode 3211 are both located in the second metal layer M2. That is, the first touch control unit 31 and the second touch control unit 32 in this embodiment are arranged in the same layer. It should be noted that, Figure 7 and Figure 8 The first metal layer M1 and the second metal layer M2 are filled differently at different positions only to distinguish different structures of the same metal layer, but the material of the same metal layer is the same.

[0085] Furthermore, if Figure 7 and Fig. 9 As shown, the first touch electrodes 311 in the same first touch unit 31 are electrically connected via a first wiring 3112 located in the first metal layer M1. The first wiring 3112 is prepared in the first metal layer M1 by an etching process.

[0086] Furthermore, if Figure 8 and Fig.10 As shown, the second touch electrodes 321 in the same second touch unit 32 are electrically connected via a second wiring 3212 located in the second metal layer M2. The second wiring 3212 is prepared in the second metal layer M2 by an etching process.

[0087] Continue to refer Figure 7 and Figure 8 In some embodiments, the display panel 100 further includes: an insulating layer 40. The insulating layer 40 is located between the first metal and the second metal layer M2. The insulating layer 40 includes a plurality of first vias 41, and the first vias 41 penetrate the insulating layer 40 in a direction perpendicular to the base substrate 10 and expose at least a portion of the first metal layer M1. Each first touch electrode 311 in the same first touch unit 31 is electrically connected to the same metal trace of the first metal layer M1 through the first via 41. Specifically, along the second direction Y, there are two first vias 41 between every two adjacent second touch electrodes 321, and the two first vias 41 penetrate the insulating layer 40 in a direction perpendicular to the base substrate 10 and expose a portion of a first trace 3112, and the two adjacent second touch electrodes 321 are electrically connected to the first trace 3112 through the two first vias 41.

[0088] like Fig.11 and Fig.12 As shown, in some alternative embodiments, the display panel 100 further includes: a first metal layer M1 and a second metal layer M2. The first metal layer M1 is located between the base substrate 10 and the light-emitting element 20. The second metal layer M2 is located between the first metal layer M1 and the light-emitting element 20. It should be noted that the positions and hierarchical settings of the first metal layer M1 and the second metal layer M2 of this embodiment can be the same as those of the aforementioned embodiment, and will not be repeated here.

[0089] Further, the first metal layer M1 includes a plurality of second touch control units 32, and the second metal layer M2 includes a plurality of first touch control units 31. That is, the first auxiliary electrode 3111 is located in the second metal layer M2, and the second auxiliary electrode 3211 is located in the first metal layer M1. That is, the first touch control unit 31 and the second touch control unit 32 in this embodiment are arranged in different layers. It should be noted that Fig.11 and Fig.12 The first metal layer M1 and the second metal layer M2 are filled differently at different positions only to distinguish different structures of the same metal layer, but the material of the same metal layer is the same.

[0090] Furthermore, if Fig.11 and Fig.13 As shown, the first touch electrodes 311 in the same first touch unit 31 are electrically connected via a second wiring 3212 located in the second metal layer M2. The second wiring 3212 is prepared in the second metal layer M2 by an etching process.

[0091] Furthermore, if Fig.12 and Fig.14As shown, the second touch control electrodes 321 in the same second touch control unit 32 are electrically connected via a first wiring 3112 located on the first metal layer M1. The first wiring 3112 is prepared on the first metal layer M1 by an etching process.

[0092] Continue to refer Figure 7 , Figure 8 , Fig.11 and Fig.12 In some embodiments, the second metal layer M2 further includes a second power supply line (not shown in the figure) and a cathode 23 of the light-emitting element 20, the second power supply line is electrically connected to the cathode 23 of the light-emitting element 20, and provides a first voltage for the light-emitting element 20. The first metal layer M1 further includes a first power supply line (not shown in the figure) and an anode 24 of the light-emitting element 20, the first power supply line is electrically connected to the anode 24 of the light-emitting element 20, and provides a second voltage for the light-emitting element 20. The first voltage and the second voltage are different voltages. Specifically, the first voltage may be a negative voltage, and the second voltage may be a positive voltage. The light-emitting element 20 emits light under the action of the positive voltage of the anode 24 and the negative voltage of the cathode 23.

[0093] In some embodiments, the shapes of the first touch electrode 311 and the second touch electrode 321 include a combination of one or more shapes of a rectangle, a diamond, or a Manhattan figure, which is not limited in the present application. Specifically, since the first touch electrode 311 includes a plurality of first auxiliary electrodes 3111, the first touch electrode 311 can be formed by the overall shape of the plurality of first auxiliary electrodes 3111. The second touch electrode 321 is similar.

[0094] In some embodiments, the shape of the first touch electrode 311 and the second touch electrode 321 are both rhombuses with a side length of 0.8 to 1.2 cm. Since rhombuses can be densely laid, the above arrangement can make the first touch electrode 311 and the second touch electrode 321 combined to cover the touch area of ​​the display panel 100 as much as possible, so as to improve the touch sensitivity of the display panel 100. The above side length range of the first touch electrode 311 or the second touch electrode 321 can improve the touch performance of the display panel 100 while facilitating preparation. Specifically, the side length of the first touch electrode 311 or the second touch electrode 321 can be any value of 0.8 cm, 0.9 cm, 1.0 cm, 1.1 cm or 1.2 cm, and this application does not limit this.

[0095] Further, along the first direction X, the distance between the centers of two adjacent light-emitting elements 20 is 80 to 120 microns. Along the second direction Y, the distance between the centers of two adjacent light-emitting elements 20 is 280 to 320 microns. That is, along the first direction X, the distance between the centers of two adjacent first auxiliary electrodes 3111 in the same first touch electrode 311 can be 80 to 120 microns; the distance between the centers of two adjacent second auxiliary electrodes 3211 in the same second touch electrode 321 can also be 80 to 120 microns. Along the second direction Y, the distance between the centers of two adjacent first auxiliary electrodes 3111 in the same first touch electrode 311 can be 280 to 320 microns; the distance between the centers of two adjacent second auxiliary electrodes 3211 in the same second touch electrode 321 can also be 280 to 320 microns. The above arrangement can ensure the aperture ratio of the display panel 100 while facilitating the preparation of the first auxiliary electrode 3111 and the second auxiliary electrode 3211.

[0096] Specifically, along the first direction X, the distance between the centers of two adjacent light emitting elements 20 can be any value of 80 microns, 90 microns, 100 microns, 110 microns or 120 microns, and the present application does not limit this. Along the second direction Y, the distance between the centers of two adjacent light emitting elements 20 can be any value of 280 microns, 290 microns, 300 microns, 310 microns or 320 microns, and the present application does not limit this.

[0097] Continue to refer Fig. 9 , Fig.10 , Fig.13 and Fig.14 In some embodiments, the first auxiliary electrode 3111 and the second auxiliary electrode 3211 are both closed rectangular traces. Specifically, the shapes of the first auxiliary electrode 3111 and the second auxiliary electrode 3211 can be adjusted according to the shape of the light-emitting element 20, and the present application does not limit this. In addition, the first auxiliary electrode 3111 and the second auxiliary electrode 3211 may not be closed figures, and it is only necessary to ensure that all the first auxiliary electrodes 3111 in the same first touch electrode 311 are electrically connected to each other, and all the second auxiliary electrodes 3211 in the second touch electrode 321 are electrically connected to each other. All the first auxiliary electrodes 3111 in the same first touch electrode 311 are electrically connected through the metal traces on the same layer as the first auxiliary electrode 3111. All the second auxiliary electrodes 3211 in the same second touch electrode 321 are electrically connected through the metal traces on the same layer as the second auxiliary electrode 3211.

[0098] Continue to refer Fig. 9 , Fig.10 and Fig.13, the first auxiliary electrode 3111 and the second auxiliary electrode 3211 respectively overlap at least partially with the projection of the corresponding reflective metal 22 on the base substrate 10. That is, the projection area of ​​the first auxiliary electrode 3111 and the second auxiliary electrode 3211 is larger than the projection area of ​​the reflective metal 22, which can improve the touch sensitivity of the display panel 100.

[0099] In some embodiments, the thickness of the first auxiliary electrode 3111 and the second auxiliary electrode 3211 is 300-800 nanometers along a direction perpendicular to the plane of the display panel 100. Specifically, the thickness of the first auxiliary electrode 3111 and the second auxiliary electrode 3211 can be any value of 300 nanometers, 400 nanometers, 500 nanometers, 600 nanometers, 700 nanometers or 800 nanometers, respectively, and the present application does not limit this.

[0100] In some embodiments, along the direction parallel to the plane where the display panel 100 is located, the width of the first auxiliary electrode 3111 and the second auxiliary electrode 3211 are both 3 to 10 microns. The above arrangement can increase the area of ​​the first auxiliary electrode 3111 and the second auxiliary electrode 3211 while facilitating preparation, thereby improving the touch sensitivity of the display panel 100. Specifically, the width of the first auxiliary electrode 3111 and the second auxiliary electrode 3211 can be any value of 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns or 10 microns, respectively, and this application does not limit this.

[0101] In addition, the material of the first metal or the second metal may be a stacked structure of titanium / aluminum / titanium materials, which is not limited in the present application.

[0102] like Fig.15 As shown, in some alternative embodiments, the touch control unit 30 includes a plurality of third touch control electrodes 331, and the third touch control electrodes 331 are arranged in an array and insulated from each other. That is, in these embodiments, the display panel 100 can be a self-capacitive touch panel. In a self-capacitive touch panel, a finger is considered to be a ground capacitor. Before the finger touches the display panel 100, the touch control unit 30 itself has a parasitic capacitance, and after the finger touches, it is equivalent to an increase in the ground capacitance of the touch control unit 30. The display panel 100 detects the change in the capacitance to the ground at this position, thereby detecting whether the finger touches the display panel 100 and the position of the touch.

[0103] Furthermore, at least one third touch electrode 331 is electrically connected to at least one reflective metal 22. The position where the third touch electrode 331 of the present application is electrically connected to the reflective metal 22 can greatly reduce the height difference between the touch unit 30 and the position touched by the user's finger, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0104] Optionally, multiple third touch electrodes 331 are electrically connected to the reflective metal 22, wherein each third touch electrode 331 is electrically connected to multiple reflective metals 22, respectively, so as to reduce the height difference between the touch unit 30 and the touch position of the user's finger at the multiple light-emitting elements 20, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0105] like Fig.16 As shown, in some embodiments, the third touch electrode 331 includes a plurality of third auxiliary electrodes 3311 , and the third auxiliary electrodes 3311 in the same third touch electrode 331 are electrically connected. That is, a plurality of third auxiliary electrodes 3311 electrically connected to each other constitute one third touch electrode 331 .

[0106] Further, each third auxiliary electrode 3311 corresponds to a light emitting element 20, and at least one third auxiliary electrode 3311 is electrically connected to a reflective metal 22. That is, the third auxiliary electrode 3311 is close in size to the light emitting element 20, and the present application reduces the height difference between the touch unit 30 and the position touched by the user's finger through the electrical connection between the third auxiliary electrode 3311 and the reflective metal 22, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0107] In some embodiments, each third auxiliary electrode 3311 is electrically connected to a reflective metal 22. That is, the third touch electrode 331 is electrically connected to the emitting metal of each light-emitting element 20 overlapped therewith, and the above arrangement can further increase the area of ​​the touch area of ​​the display panel 100 occupied by the structure where the touch unit 30 is electrically connected to the reflective metal 22, that is, the height difference between the touch unit 30 and the position touched by the user's finger is reduced as much as possible, thereby further improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0108] like Fig.17 As shown, in some alternative embodiments, the display panel 100 further includes: a third metal layer M3. The third metal layer M3 is located between the base substrate 10 and the light-emitting element 20. It should be noted that the third metal layer M3 is located between the base substrate 10 and the light-emitting element 20, which means that along the thickness direction of the display panel 100, the level of the third metal layer M3 is located between the base substrate 10 and the light-emitting element 20, and it does not mean that the absolute height of the third metal layer M3 must be located between the base substrate 10 and the light-emitting element 20.

[0109] Further, the third metal layer M3 includes a plurality of touch control units 30. That is, the third auxiliary electrodes 3311 are all located in the third metal layer M3. That is, the touch control units 30 are all arranged in the same layer. It should be noted that, Fig.17The third metal layer M3 is filled differently at different positions only to distinguish different structures of the same metal layer, but the material of the same metal layer is the same.

[0110] Furthermore, if Fig.17 and Fig.18 As shown, the third auxiliary electrodes 3311 in the same third touch electrode 331 are electrically connected via the third wiring 3312 located in the third metal layer M3. The first wiring 3112 is prepared in the first metal layer M1 by an etching process.

[0111] Continue to refer Fig.17 In some embodiments, the third metal layer M3 also includes a third power supply line (not shown in the figure) and a cathode 23 of the light-emitting element 20, and the third power supply line is electrically connected to the cathode 23 of the light-emitting element 20, and provides a third voltage for the light-emitting element 20. The display panel 100 may also include: a fourth metal layer (shown in the figure but not marked). The fourth metal layer includes a fourth power supply line (not shown in the figure) and an anode 24 of the light-emitting element 20. The third voltage and the fourth voltage are different voltages. Specifically, the third voltage may be a negative voltage, and the fourth voltage may be a positive voltage. The light-emitting element 20 emits light under the action of the positive voltage of the anode 24 and the negative voltage of the cathode 23.

[0112] In some embodiments, the light emitting element 20 includes one or more of Micro LED, Mini LED or composite LED, which is not limited in the present application. Among the different technical branches of LED displays, Micro LED displays have attracted much attention in the market due to their self-luminescence, high resolution and long life, and are considered to be an important direction of the next generation of display technology.

[0113] The display panel 100 of the present invention realizes an embedded touch layer by disposing the touch unit 30 between the base substrate 10 and the light emitting element 20 along the thickness direction of the display panel 100, thereby reducing the thickness of the display panel 100; and because the reflective metal 22 is closer to the touch position of the user's finger than the touch unit 30, the reflective metal 22 of the light emitting element 20 is electrically connected to the touch unit 30, so that the reflective metal 22 becomes an extension of the touch unit 30 along the thickness direction of the display panel 100, so that the height difference between the touch unit 30 and the touch position of the user's finger can be reduced, thereby improving the touch recognition accuracy of the display panel 100 and increasing the reliability of the display panel 100.

[0114] On the other hand, Fig.19As shown, an embodiment of the present invention further provides a display device 200, comprising the display panel 100 provided in the embodiment of the present invention. The display device 200 can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc. The specific implementation and technical effects of the display device 200 can refer to the specific embodiment of the display panel 100, and the repeated parts will not be repeated.

[0115] In summary, the display panel and the display device of the present invention realize an embedded touch layer by setting the touch unit between the base substrate and the light-emitting element along the thickness direction of the display panel, thereby reducing the thickness of the display panel; and because the reflective metal is closer to the touch position of the user's finger than the touch unit, the reflective metal of the touch unit and the light-emitting element are electrically connected, so that the reflective metal becomes an extension of the touch unit along the thickness direction of the display panel, thereby reducing the height difference between the touch unit and the touch position of the user's finger, thereby improving the touch recognition accuracy of the display panel and increasing the reliability of the display panel.

[0116] The above contents are further detailed descriptions of the present invention in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: substrate substrate; A plurality of light-emitting elements, wherein the light-emitting elements are located on one side of the substrate; the light-emitting elements include a light-emitting material and a reflective metal covering the light-emitting material; A plurality of touch control units, wherein the touch control units are located between the base substrate and the light emitting element, and the plurality of touch control units are insulated from each other; Wherein, at least one of the touch control units is electrically connected to at least one of the reflective metals.

2. The display panel according to claim 1, characterized in that: The reflective metal is at least located on the side wall of the light emitting element; The material of the reflective metal includes aluminum; The reflective metal includes a protruding portion protruding toward one side of the base substrate, and the reflective metal is electrically connected to the touch control unit through the protruding portion.

3. The display panel according to claim 1, characterized in that: The touch control unit includes a plurality of first touch control units arranged along a first direction and a plurality of second touch control units arranged along a second direction, the first direction intersects with the second direction, and the first touch control units and the second touch control units are insulated from each other; Wherein, at least one of the first touch control units or at least one of the second touch control units is electrically connected to at least one of the reflective metals.

4. The display panel according to claim 3, characterized in that: The first touch control unit includes a plurality of first touch control electrodes, and the first touch control electrodes in the same first touch control unit are arranged along the first direction and are electrically connected to each other; The second touch control unit includes a plurality of second touch control electrodes, and the second touch control electrodes in the same second touch control unit are arranged along the second direction and are electrically connected to each other; Wherein, at least one of the first touch control electrodes or at least one of the second touch control electrodes is electrically connected to at least one of the reflective metals.

5. The display panel according to claim 4, characterized in that: The first touch control electrode includes a plurality of first auxiliary electrodes, each of which is electrically connected to the first auxiliary electrodes in the same first touch control electrode; The second touch control electrode includes a plurality of second auxiliary electrodes, each of which is electrically connected to the second auxiliary electrodes in the same second touch control electrode; Each of the first auxiliary electrodes and each of the second auxiliary electrodes corresponds to one of the light-emitting elements, and at least one of the first auxiliary electrodes and at least one of the second auxiliary electrodes are electrically connected to one of the reflective metals.

6. The display panel according to claim 5, characterized in that: Each of the first auxiliary electrodes and each of the second auxiliary electrodes is electrically connected to one of the reflective metals.

7. The display panel according to claim 4, characterized in that: Also includes: A first metal layer, located between the substrate and the light emitting element; A second metal layer, located between the first metal layer and the light emitting element; Wherein, the second metal layer includes a plurality of the first touch control units and a plurality of the second touch control units; The first touch electrodes in the same first touch unit are electrically connected via a first wiring located on the first metal layer; The second touch control electrodes in the same second touch control unit are electrically connected via a second wiring located on the second metal layer.

8. The display panel according to claim 7, characterized in that: Also includes: an insulating layer, located between the first metal layer and the second metal layer; Wherein, the insulating layer comprises a plurality of first via holes, and the first via holes penetrate the insulating layer in a direction perpendicular to the substrate and expose at least a portion of the first metal layer; Each of the first touch control electrodes in the same first touch control unit is electrically connected to the same metal trace of the first metal layer through the first via hole.

9. The display panel according to claim 4, characterized in that: Also includes: A first metal layer, located between the substrate and the light emitting element; A second metal layer, located between the first metal layer and the light emitting element; Wherein, the first metal layer includes a plurality of the second touch control units, and the second metal layer includes a plurality of the first touch control units; The first touch electrodes in the same first touch unit are electrically connected via a second wiring located on the second metal layer; The second touch control electrodes in the same second touch control unit are electrically connected via a first wiring located on the first metal layer.

10. The display panel according to claim 7 or 9, characterized in that: The second metal layer further includes a second power supply line and a cathode of the light emitting element, wherein the second power supply line is electrically connected to the cathode of the light emitting element and provides a first voltage for the light emitting element; The first metal layer further includes a first power supply line and an anode of the light emitting element, wherein the first power supply line is electrically connected to the anode of the light emitting element and provides a second voltage for the light emitting element; The first voltage and the second voltage are different voltages.

11. The display panel according to claim 4, characterized in that: The shapes of the first touch control electrode and the second touch control electrode include a combination of one or more shapes of a rectangle, a diamond or a Manhattan figure.

12. The display panel according to claim 11, characterized in that: The first touch electrode and the second touch electrode are both in the shape of a rhombus with a side length of 0.8 to 1.2 cm; Along the first direction, the distance between the centers of two adjacent light-emitting elements is 80 to 120 micrometers, and along the second direction, the distance between the centers of two adjacent light-emitting elements is 280 to 320 micrometers.

13. The display panel according to claim 5, characterized in that: The first auxiliary electrode and the second auxiliary electrode are both closed rectangular wirings; The first auxiliary electrode and the second auxiliary electrode at least partially overlap with the projections of the corresponding reflective metal on the base substrate.

14. The display panel according to claim 5, characterized in that: Along a direction perpendicular to the plane where the display panel is located, the thickness of the first auxiliary electrode and the second auxiliary electrode are both 300 to 800 nanometers; Along a direction parallel to the plane where the display panel is located, the width of the first auxiliary electrode and the second auxiliary electrode are both 3 to 10 micrometers.

15. The display panel according to claim 1, characterized in that: The touch control unit comprises a plurality of third touch control electrodes, which are arranged in an array and insulated from each other; Wherein, at least one of the third touch electrodes is electrically connected to at least one of the reflective metals.

16. The display panel according to claim 15, characterized in that: The third touch control electrode includes a plurality of third auxiliary electrodes, and each of the third auxiliary electrodes in the same third touch control electrode is electrically connected; Each of the third auxiliary electrodes corresponds to one of the light-emitting elements, and at least one of the third auxiliary electrodes is electrically connected to one of the reflective metals.

17. The display panel according to claim 16, characterized in that: Each of the third auxiliary electrodes is electrically connected to one of the reflective metals.

18. The display panel according to claim 16, characterized in that: Also includes: A third metal layer is located between the substrate and the light emitting element; Wherein, the third metal layer includes a plurality of the touch control units; The third auxiliary electrodes in the same third touch electrode are electrically connected via a third wiring located in the third metal layer.

19. The display panel according to claim 18, characterized in that: The third metal layer also includes a third power supply line and a cathode of the light emitting element. The third power supply line is electrically connected to the cathode of the light emitting element and provides a third voltage for the light emitting element.

20. The display panel according to claim 1, characterized in that: The light-emitting element includes one or more of Micro LED, Mini LED or composite LED.

21. A display device, characterized in that: Comprising the display panel according to any one of claims 1 to 20.

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