Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a substrate, a plurality of first light-emitting units, a plurality of second light-emitting units and a light-shielding wall. In the top view direction of the display panel, each second light-emitting unit is arranged between two adjacent first light-emitting units, and the light-shielding wall and the second light-emitting unit are arranged overlappingly and non-overlappingly with the first light-emitting unit. The present application arranges the light-shielding wall and the second light-emitting unit overlappingly and non-overlappingly with the first light-emitting unit so that when the second light-emitting unit emits light, the light-shielding wall can block the light emitted by the second light-emitting unit in a direction perpendicular to the substrate, thereby causing the remaining light emitted by the second light-emitting unit to be superimposed laterally with the light emitted by the first light-emitting unit, thereby increasing the side view light intensity of the display panel, thereby preventing the human eye from seeing the display content clearly due to the excessive light when viewing the screen from the side, thereby achieving the effect of preventing side peeping.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) is an organic thin film electroluminescent device, which has the advantages of easy formation of flexible structure and wide viewing angle; therefore, display technology using organic light emitting diodes has become an important display technology.

[0003] However, due to the large viewing angle of OLED display screens, people can be easily spied on by others when browsing information through the screen, which puts personal privacy, business secrets or technical information at risk of leakage. Therefore, in some public places, OLED display screens need to have anti-peeping effects. At present, display screens that use display technologies such as liquid crystal displays (LCD) usually adjust the visual viewing angle of the display screen by actively driving the liquid crystal, which is bound to make the display control process of the display screen more complicated and is not applicable to display screens that use OLED display technology.

[0004] Therefore, there is an urgent need to provide a display panel and a display device to solve the above technical problems. Summary of the invention

[0005] The present application provides a display panel and a display device to improve the technical problem that the existing display panel is difficult to achieve an anti-peeping function.

[0006] To solve the above-mentioned problems, the technical solutions provided by this application are as follows:

[0007] The embodiment of the present application provides a display panel, comprising a substrate, a first light-emitting functional layer disposed on the substrate, a second light-emitting functional layer disposed on the substrate, and a light-shielding wall, wherein the first light-emitting functional layer comprises a plurality of first light-emitting units, the second light-emitting functional layer comprises a plurality of second light-emitting units, and the light-shielding wall is disposed on a side of the second light-emitting functional layer away from the substrate;

[0008] Wherein, in the top view direction of the display panel, each of the second light-emitting units is arranged between two adjacent first light-emitting units, the light-shielding wall and the second light-emitting units are arranged overlappingly, and the light-shielding wall and the first light-emitting units are arranged non-overlappingly.

[0009] In the display panel provided in the embodiment of the present application, the display panel further includes a touch layer located on the second light-emitting functional layer and away from the substrate, and the touch layer includes:

[0010] A first metal layer including a plurality of patterned driving electrodes; and

[0011] A second metal layer, located on the first metal layer, comprising a plurality of patterned receiving electrodes;

[0012] Wherein, the light-shielding barrier includes a plurality of the driving electrodes and / or a plurality of the receiving electrodes.

[0013] In the display panel provided in the embodiment of the present application, the display panel further includes an encapsulation layer located between the first light-emitting functional layer and the touch control layer, the encapsulation layer including a first inorganic encapsulation layer disposed on the first light-emitting functional layer, an organic encapsulation layer disposed on the first inorganic encapsulation layer, a second inorganic encapsulation layer disposed on the organic encapsulation layer, and a third inorganic encapsulation layer disposed on the second inorganic encapsulation layer;

[0014] The refractive index of the first inorganic encapsulation layer is greater than that of the organic encapsulation layer, the refractive index of the organic encapsulation layer is greater than that of the second inorganic encapsulation layer, and the refractive index of the second inorganic encapsulation layer is greater than that of the organic encapsulation layer.

[0015] In the display panel provided in the embodiment of the present application, the display panel further comprises a pixel definition layer disposed on the substrate, and the first light-emitting functional layer and the second light-emitting functional layer are disposed in the same layer;

[0016] The pixel definition layer includes a plurality of openings and a groove arranged between two adjacent openings, the first light emitting unit is arranged in the opening, and the second light emitting unit is arranged in the groove.

[0017] In the display panel provided in the embodiment of the present application, the first light-emitting unit includes a first anode layer located in the opening, and the second light-emitting unit includes a second anode layer located in the groove;

[0018] The first anode layer includes a first flat portion, the second anode layer includes a second flat portion and a raised portion arranged on the second flat portion, the thickness of the second flat portion is equal to the thickness of the first flat portion, and the raised direction of the raised portion is the direction in which the pixel definition layer is away from the substrate.

[0019] In the display panel provided in the embodiment of the present application, the display panel further includes a first pixel driving circuit and a second pixel driving circuit, the first pixel driving circuit is electrically connected to the plurality of the first light-emitting units, and the second pixel driving circuit is electrically connected to the plurality of the second light-emitting units;

[0020] The first pixel driving circuit is an active matrix driving circuit, and the second pixel driving circuit is a passive matrix driving circuit.

[0021] In the display panel provided in the embodiment of the present application, the second light-emitting functional layer includes a plurality of second light-emitting functional groups arranged along the length direction of the substrate, and each of the second light-emitting functional groups includes a plurality of second light-emitting units arranged along the width direction of the substrate;

[0022] Wherein, a plurality of the second light-emitting units in the same second light-emitting functional group are all electrically connected to the second pixel driving circuit.

[0023] In the display panel provided in the embodiment of the present application, the light emitting colors of the plurality of second light emitting units in the same second light emitting functional group are the same, and the plurality of second light emitting functional groups with the same light emitting color are electrically connected.

[0024] In the display panel provided in the embodiment of the present application, the second light-emitting unit includes any one of a red light-emitting material layer, a green light-emitting material layer and a blue light-emitting material layer;

[0025] The second pixel driving circuit includes a first sub-driving circuit, a second sub-driving circuit and a third sub-driving circuit, the first sub-driving circuit is electrically connected to the red light-emitting material layer, the second sub-driving circuit is electrically connected to the green light-emitting material layer, and the third sub-driving circuit is electrically connected to the blue light-emitting material layer;

[0026] Among them, when the second pixel driving circuit drives multiple second light-emitting units to emit light, the minimum driving current of the first sub-driving circuit is smaller than the minimum driving current of the second sub-driving circuit, and the minimum driving current of the second sub-driving circuit is smaller than the minimum driving current of the third sub-driving circuit.

[0027] Correspondingly, an embodiment of the present application also provides a display device, comprising a display panel as described in any one of the above items and a processor, wherein the processor is used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn on an anti-peeping function, so that both the first light-emitting functional layer and the second light-emitting functional layer emit light; the processor is also used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn off the anti-peeping function, so that the first light-emitting functional layer emits light and the second light-emitting functional layer does not emit light.

[0028] Beneficial effect: The present application discloses a display panel and a display device, wherein the display panel comprises a substrate, a first light-emitting functional layer arranged on the substrate, a second light-emitting functional layer arranged on the substrate, and a light-shielding wall, wherein the first light-emitting functional layer comprises a plurality of first light-emitting units, the second light-emitting functional layer comprises a plurality of second light-emitting units, and the light-shielding wall is arranged on a side of the second light-emitting functional layer away from the substrate, wherein in the top view direction of the display panel, each of the second light-emitting units is arranged between two adjacent first light-emitting units, the light-shielding wall and the second light-emitting unit are arranged in an overlapping manner, and the light-shielding wall and the first light-emitting unit are arranged in an overlapping manner. The present application arranges the light-shielding wall and the second light-emitting unit in an overlapping manner, and arranges the light-shielding wall and the first light-emitting unit in a non-overlapping manner, so that when the second light-emitting unit emits light, the light-shielding wall can block the light emitted by the second light-emitting unit in a direction perpendicular to the substrate, thereby causing part of the light emitted by the second light-emitting unit that is not blocked by the light-shielding wall to overlap with the light emitted by the first light-emitting unit in the lateral direction, thereby increasing the side view light intensity of the display panel, thereby preventing the human eye from seeing the display content clearly due to the bright light when viewing the screen from the side, thereby achieving the effect of preventing side peeping, thereby realizing the anti-peeping function of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0030] Figure 1 A cross-sectional structural diagram of a display panel provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 An enlarged schematic diagram at A;

[0032] Figure 3 A schematic diagram of pixel driving of a second light-emitting unit in a display panel provided in the first embodiment of the present application;

[0033] Figure 4 A schematic diagram of pixel driving of a second light-emitting unit in a display panel provided in the second embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] See also Figures 1 to 4 The present application discloses a display panel 100 and a display device, wherein the display panel 100 includes a substrate 110, a first light-emitting functional layer arranged on the substrate 110, a second light-emitting functional layer arranged on the substrate 110, and a light-shielding wall 160, wherein the first light-emitting functional layer includes a plurality of first light-emitting units 141, the second light-emitting functional layer includes a plurality of second light-emitting units 142, and the light-shielding wall 160 is arranged on a side of the second light-emitting functional layer away from the substrate 110, wherein in the top view direction of the display panel 100, each of the second light-emitting units 142 is arranged between two adjacent first light-emitting units 141, the light-shielding wall 160 and the second light-emitting unit 142 are arranged overlappingly, and the light-shielding wall 160 and the first light-emitting unit 141 are arranged non-overlappingly.

[0036] The present application arranges the light-shielding wall 160 and the second light-emitting unit 142 to overlap, and the light-shielding wall 160 and the first light-emitting unit 141 to be non-overlapping, so that when the second light-emitting unit 142 emits light, the light-shielding wall 160 can block the light emitted by the second light-emitting unit 142 in a direction perpendicular to the substrate 110, thereby causing part of the light emitted by the second light-emitting unit 142 that is not blocked by the light-shielding wall 160 to overlap with the light emitted by the first light-emitting unit 141 in the side direction, thereby increasing the side view light intensity of the display panel 100, thereby preventing the human eye from seeing the display content clearly due to the bright light when viewing the screen from the side, thereby achieving the effect of preventing side peeping, and thus realizing the anti-peeping function of the display panel 100.

[0037] The technical solution of the present application is now described in conjunction with specific embodiments.

[0038] Embodiment 1

[0039] See also Figure 1 , FIG. is a cross-sectional structural diagram of a display panel 100 provided in an embodiment of the present application; wherein the display panel 100 includes a substrate 110, a first light-emitting functional layer disposed on the substrate 110, a second light-emitting functional layer disposed on the substrate 110, and a light-shielding barrier 160, wherein the first light-emitting functional layer includes a plurality of first light-emitting units 141, the second light-emitting functional layer includes a plurality of second light-emitting units 142, and the light-shielding barrier 160 is disposed on a side of the second light-emitting functional layer away from the substrate 110;

[0040] In which, in the top view direction of the display panel 100, each of the second light-emitting units 142 is arranged between two adjacent first light-emitting units 141, the light-shielding wall 160 and the second light-emitting unit 142 are arranged overlappingly, and the light-shielding wall 160 and the first light-emitting unit 141 are arranged non-overlappingly.

[0041] In an embodiment of the present application, the display panel 100 includes a back plate 220 and a buffer component 230, the back plate 220 is arranged on the side of the substrate 110 away from the light-shielding wall 160, and the buffer component 230 is arranged on the side of the back plate 220 away from the substrate 110; the back plate 220 serves to support the display panel 100, and the buffer component 230 serves to buffer the display panel 100.

[0042] Specifically, the buffer assembly 230 may include an adhesive layer, a foam layer, a polyimide layer, and a metal layer which are sequentially stacked and disposed on a side of the back plate 220 away from the light shielding wall 160;

[0043] The adhesive layer is bonded to the back plate 220 and can be a mesh adhesive. The mesh adhesive has the function of fitting and exhausting and is flexible, and will not affect the flexible design of the display module. In other embodiments, the adhesive layer can be other adhesive layers.

[0044] In one embodiment, the foam layer can be foam, which can play a role of buffering and shading; the polyimide layer can play a reinforcing role and increase the reliability of the buffer component 230. In other embodiments, the buffer component 230 may not include the polyimide layer.

[0045] In other embodiments, the polyimide layer may be replaced by a graphite layer, and the outer surface of the graphite layer may be coated with polyimide; the material of the metal layer may be copper, aluminum or an alloy structure thereof, and the metal layer may play a role in heat dissipation. Specifically, the metal layer may be copper foil or aluminum foil.

[0046] In the embodiment of the present application, the substrate 110 may include a material having a rigid property and not being bent, such as glass, or a flexible material such as plastic or polyimide that can be bent.

[0047] In an embodiment of the present application, the display panel 100 also includes an array structure layer 120 arranged on the side of the substrate 110 away from the backplane 220, wherein the array structure layer 120 includes a blocking layer, a buffer layer, a transistor having a semiconductor, a gate electrode, a source electrode and a drain electrode, a gate insulating layer, an interlayer insulating layer and a first planarization layer.

[0048] Specifically, the barrier layer may include an inorganic substance, for example, an inorganic insulating substance such as silicon nitride, silicon oxide, silicon oxynitride, etc. The barrier layer may be a single layer or a multilayer structure of the substance; the buffer layer may include an inorganic insulating substance such as silicon nitride, silicon oxide, silicon oxynitride, etc., and the buffer layer may be a single layer or a multilayer structure of the substance.

[0049] In an embodiment of the present application, the semiconductor may include any one of amorphous silicon, polycrystalline silicon and an oxide semiconductor. As an example, the semiconductor may include low temperature polycrystalline silicon, or may include an oxide semiconductor material containing at least one of zinc, indium, gallium, tin and a mixture thereof. As an example, the semiconductor may include indium gallium zinc oxide. The semiconductor may also include a channel region, a source region and a drain region divided according to whether or not it is doped with impurities. The source region and the drain region may have conductive properties corresponding to the conductor.

[0050] In the embodiment of the present application, the gate insulating film may cover the semiconductor and the substrate 110. The gate insulating film may include inorganic insulating materials such as silicon nitride, silicon oxide, silicon oxynitride, etc. The gate insulating film may be a single layer or multilayer structure of the materials.

[0051] In an embodiment of the present application, the gate electrode may be located on the gate insulating film. The gate electrode may include a metal or a metal alloy such as copper, molybdenum, aluminum, silver, chromium, tantalum, titanium, etc. The gate electrode may be composed of a single layer or multiple layers. In the semiconductor, the region overlapping with the gate electrode on a plane is a channel region.

[0052] In the embodiment of the present application, the interlayer insulating film may cover the gate electrode and the gate insulating film. The interlayer insulating film may include inorganic insulating materials such as silicon nitride, silicon oxide, silicon oxynitride, etc.; the interlayer insulating film may be a single layer or multilayer structure of the material.

[0053] In an embodiment of the present application, the source electrode and the drain electrode may be located on the interlayer insulating film. The source electrode and the drain electrode may be connected to the source region and the drain region of the semiconductor respectively through vias formed in the interlayer insulating film and the gate insulating film. Thus, the aforementioned semiconductor, the gate electrode, the source electrode and the drain electrode constitute a transistor. According to the above embodiment, the transistor may only include the source region and the drain region of the semiconductor instead of the source electrode and the drain electrode.

[0054] Specifically, the source electrode and the drain electrode may include metals or metal alloys such as aluminum (Al), copper (Cu), silver (Ag), gold (Au), platinum (Pt), palladium (Pd), nickel (Ni), molybdenum (Mo), tungsten (W), titanium (Ti), chromium (Cr), and tantalum (Ta). The source electrode and the drain electrode may be composed of a single layer or multiple layers. The source electrode and the drain electrode involved in one embodiment may be composed of three layers including an upper layer, an intermediate layer, and a lower layer, the upper layer and the lower layer may include titanium (Ti), and the intermediate layer may include aluminum (Al).

[0055] In the embodiment of the present application, the first planarization layer may be located on the source electrode and the drain electrode. The first planarization layer covers the source electrode, the drain electrode and the interlayer insulating film. The first planarization layer is used to planarize the surface of the substrate 110 of the transistor, and may be an organic insulating film, and may include one or more substances selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene and phenolic resin.

[0056] In an embodiment of the present application, the display panel 100 also includes a pixel definition layer 130 arranged on the side of the array structure layer 120 away from the substrate 110; wherein the pixel definition layer 130 includes a plurality of openings 131 and a groove 132 arranged between two adjacent openings 131, the first light-emitting functional layer and the second light-emitting functional layer are arranged in the same layer, the first light-emitting unit 141 is arranged in the opening 131, and the second light-emitting unit 142 is arranged in the groove 132.

[0057] Specifically, the pixel definition layer 130 may be an organic insulating film including one or more substances selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene and phenolic resin. According to an embodiment, the pixel definition layer 130 may be formed of a black pixel definition layer 130 including a black pigment.

[0058] like Figure 2 As shown, Figure 1 An enlarged schematic diagram at A; wherein the first light-emitting unit 141 includes a first anode layer 1411 located in the opening 131, and the second light-emitting unit 142 includes a second anode layer 1421 located in the groove 132;

[0059] Specifically, the first anode layer 1411 includes a first flat portion, the second anode layer 1421 includes a second flat portion 14211 and a raised portion 14212 arranged on the second flat portion 14211, the thickness of the second flat portion 14211 is equal to the thickness of the first flat portion, and the raised direction of the raised portion 14212 is the direction in which the pixel definition layer 130 is away from the substrate 110.

[0060] Furthermore, the second anode layer 1421 adopts an arc convex design, so that the light emitted by the second light-emitting unit 142 is reflected by the light-shielding wall 160 above and then irradiated to the convex portion 14212 of the second anode layer 1421. Due to the arc design of the convex portion 14212, the convex portion 14212 increases the reflection angle of the reflected light, thereby causing the reflected light to be emitted toward the side of the display panel 100, thereby increasing the reflection viewing angle of the display panel 100.

[0061] In the embodiment of the present application, the first anode layer 1411 and the second anode layer 1421 may be composed of a single layer or a multilayer including a transparent conductive oxide film and a metal substance. The transparent conductive oxide film may include indium tin oxide, indium zinc oxide, indium gallium zinc oxide, indium tin zinc oxide, etc. The metal substance may include silver (Ag), molybdenum (Mo), copper (Cu), gold (Au), aluminum (Al), etc.

[0062] In an embodiment of the present application, the first planarization layer may include a via hole that exposes the drain electrode. Through the via hole of the first planarization layer, the drain electrode and the first anode layer 1411 may be physically and electrically connected. Thus, the first anode layer 1411 may be applied with an output current that will be transferred from the drain electrode to the first light-emitting unit 141. At the same time, the second anode layer 1421 is not electrically connected to the drain electrode.

[0063] Furthermore, in an embodiment of the present application, the opening 131 also includes a first light-emitting layer arranged on the first anode layer 1411 on a side away from the substrate 110, and the groove 132 also includes a second light-emitting layer arranged on the second anode layer 1421 on a side away from the substrate 110; wherein the first light-emitting layer includes any one of a red light-emitting material layer, a green light-emitting material layer and a blue light-emitting material layer, and the second light-emitting layer includes a white light-emitting material layer.

[0064] Specifically, auxiliary layers such as an electron injection layer, an electron transport layer, a hole transport layer and a hole injection layer may be included above and below the first light-emitting layer or the second light-emitting layer; a hole injection layer and a hole transport layer may be provided at the lower part of the first light-emitting layer or the second light-emitting layer, and an electron transport layer and an electron injection layer may be provided at the upper part of the first light-emitting layer or the second light-emitting layer.

[0065] In an embodiment of the present application, the display panel 100 also includes a cathode layer arranged on the pixel definition layer 130, the first light-emitting layer and the second light-emitting layer, and the cathode layer covers the opening 131 and the groove 132; wherein the cathode layer can be formed by a transparent conductive layer including indium tin oxide, indium zinc oxide, indium gallium zinc oxide and indium tin zinc oxide.

[0066] In addition, the cathode layer may have a semi-transparent property, and in this case, may form a microcavity together with the first anode layer 1411 or the second anode layer 1421. According to the microcavity structure, light of a specific wavelength may be emitted to the upper portion through the interval and characteristics between the two electrodes, and as a result, red, green or blue may be displayed.

[0067] Please continue reading Figure 1 In the embodiment of the present application, the display panel 100 further includes an encapsulation layer 150 disposed on the array structure layer 120, and the encapsulation layer 150 completely covers the first light-emitting unit 141 and the second light-emitting unit 142; wherein the encapsulation layer 150 includes a first inorganic encapsulation layer 151 disposed on the first light-emitting functional layer, an organic encapsulation layer 152 disposed on the first inorganic encapsulation layer 151, a second inorganic encapsulation layer 153 disposed on the organic encapsulation layer 152, and a third inorganic encapsulation layer 154 disposed on the second inorganic encapsulation layer 153;

[0068] The refractive index of the first inorganic encapsulation layer 151 is greater than that of the organic encapsulation layer 152 , the refractive index of the organic encapsulation layer 152 is greater than that of the second inorganic encapsulation layer 153 , and the refractive index of the second inorganic encapsulation layer 153 is greater than that of the organic encapsulation layer 152 .

[0069] Specifically, since the refractive index of each film layer in the encapsulation layer 150 decreases successively along the direction from the substrate 110 to the pixel definition layer 130, such a design allows the light emitted by the second light-emitting unit 142 to be reflected by the light-shielding wall 160 above to the second anode layer 1421. The second anode layer 1421 then reflects the light through each film layer in the encapsulation layer 150 at a large angle to the side of the display panel 100, thereby increasing the reflection viewing angle of the display panel 100 and further realizing the large-angle privacy protection of the display panel 100.

[0070] Furthermore, the first inorganic encapsulation layer 151, the second inorganic encapsulation layer 153 and the third inorganic encapsulation layer 154 are prepared by plasma enhanced chemical vapor deposition, atomic layer deposition technology, pulsed laser deposition technology (and sputtering technology and the like. The thickness of the first inorganic encapsulation layer 151, the second inorganic encapsulation layer 153 and the third inorganic encapsulation layer 154 is the same; the materials of the first inorganic encapsulation layer 151, the second inorganic encapsulation layer 153 and the third inorganic encapsulation layer 154 are any one of silicon nitride, silicon oxynitride, silicon oxide, silicon carbonitride, zinc oxide and aluminum oxide. The material of the organic encapsulation layer 152 is polyimide or epoxy resin.

[0071] In the embodiment of the present application, the display panel 100 further includes a touch layer 170 disposed on the side of the encapsulation layer 150 away from the substrate 110 , and the touch layer 170 includes a first metal layer, a second planarization layer and a second metal layer;

[0072] The first metal layer is located on the packaging layer 150 and includes a plurality of patterned driving electrodes; the second metal layer is located on the first metal layer and includes a plurality of patterned receiving electrodes, and the receiving electrodes are used to receive touch sensing signals emitted by the driving electrodes.

[0073] It is understandable that the driving electrode is used to send a touch sensing signal (low voltage high frequency signal) to the receiving electrode, thereby forming a stable current. When the human body touches the display panel 100, since the human body is grounded, an equivalent capacitor is formed between the finger and the display panel 100, and the high frequency signal can flow into the ground wire through the equivalent capacitor, so that the amount of charge received by the receiving electrode is reduced (the reduced part flows into the ground wire through the human body), and finally the touched point (touch point) is determined according to the current intensity received by the receiving electrode.

[0074] Among them, the second planarization layer is provided between the second metal layer and the first metal layer. It can be understood that, due to the relatively thick thickness of the encapsulation layer 150 and the presence of a large number of particles (not shown), the surface of the encapsulation layer 150 has a protrusion (not shown). When preparing the first metal layer, the first metal layer covers the protrusions on the surface of the encapsulation layer 150, which will also form a protrusion, which is easy to cause a short circuit between the second metal layer located on the first metal layer and the first metal layer, resulting in touch abnormality. In this application, by providing the second planarization layer between the second metal layer and the encapsulation layer 150, the second planarization layer can fill the protrusions formed by the encapsulation layer 150, avoid a short circuit between the first metal layer and the second metal layer, and improve the yield of the touch display panel 100.

[0075] In the embodiment of the present application, the second metal layer further includes a touch line, and the touch line is electrically connected to the drive electrode through a via hole on the second planarization layer. It can be understood that the touch line is located at the edge of the touch display panel 100, and is used to transmit an external touch signal to the drive electrode to realize self-capacitive touch.

[0076] In an embodiment of the present application, the first metal layer and the second metal layer may include metals or metal alloys such as aluminum (Al), copper (Cu), silver (Ag), gold (Au), platinum (Pt), palladium (Pd), nickel (Ni), molybdenum (Mo), tungsten (W), titanium (Ti), chromium (Cr), and tantalum (Ta).

[0077] In an embodiment of the present application, the light-shielding wall 160 includes a plurality of the driving electrodes and / or a plurality of the receiving electrodes, that is, the plurality of the driving electrodes and / or the plurality of the receiving electrodes can be reused as the light-shielding wall 160; such a design enables the light-shielding wall 160 to block the direct light emitted by the second light-emitting unit 142 when the anti-peeping function is needed, while increasing the side light of the second light-emitting unit 142, thereby causing part of the light emitted by the second light-emitting unit 142 that is not blocked by the light-shielding wall 160 to be superimposed laterally with the light emitted by the first light-emitting unit 141, thereby increasing the side light intensity of the display panel 100, thereby preventing the human eye from seeing the display content clearly due to the light being too bright when viewing the screen from the side, thereby achieving the effect of preventing side peeping, thereby enabling the anti-peeping function of the display panel 100 to be realized.

[0078] Furthermore, the present application reuses multiple driving electrodes and / or multiple receiving electrodes as the light-shielding barrier 160, and can achieve flexible switching of the display panel 100 between a normal display mode (wide viewing angle) and an anti-peeping mode (narrow viewing angle) without adding a new anti-peeping functional film layer, thereby improving the flexibility of the existing anti-peeping function of the display panel 100.

[0079] In the embodiment of the present application, the display panel 100 further includes a polarizing layer 180 disposed on the side of the touch layer 170 away from the substrate 110, an optical adhesive layer 190 disposed on the polarizing layer 180, and a cover plate 210 disposed on the optical adhesive layer 190. The cover plate 210 is used to protect the display panel 100.

[0080] See also Figure 3 , Figure 3 A schematic diagram of pixel driving of the second light-emitting unit 142 in the display panel 100 provided in the first embodiment of the present application; wherein the display panel 100 further includes a first pixel driving circuit and a second pixel driving circuit 30, the first pixel driving circuit is electrically connected to the plurality of the first light-emitting units 141, and the second pixel driving circuit 30 is electrically connected to the plurality of the second light-emitting units 142;

[0081] The first pixel driving circuit is an active matrix driving circuit, and the second pixel driving circuit 30 is a passive matrix driving circuit.

[0082] Specifically, the passive matrix driving circuit does not have an independent unit for controlling light, but the sub-pixels corresponding to the active matrix driving circuit are equipped with at least one transistor, which can control the transmittance of light, making the brightness brighter, the colors richer and providing a wider viewing area.

[0083] Therefore, the present application designs the pixel driving circuit of the second light-emitting functional layer as a passive matrix driving circuit, which has a simpler circuit design than an active matrix driving circuit.

[0084] See also Figure 3 In the embodiment of the present application, the second light-emitting functional layer includes a plurality of second light-emitting functional groups 1420 arranged along the length direction (X direction) of the substrate 110, and each of the second light-emitting functional groups 1420 includes a plurality of second light-emitting units 142 arranged along the width direction (Y direction) of the substrate 110, and the second light-emitting units 142 are white sub-pixels;

[0085] The plurality of second light-emitting units 142 in the same second light-emitting function group 1420 are all electrically connected to the second pixel driving circuit 30 .

[0086] In view of the technical problem that the existing display panel 100 is difficult to achieve an anti-peeping function, the present application discloses a display panel 100 and a display device, wherein the display panel 100 includes a substrate 110, a first light-emitting functional layer arranged on the substrate 110, a second light-emitting functional layer arranged on the substrate 110, and a light-shielding barrier 160, wherein the first light-emitting functional layer includes a plurality of first light-emitting units 141, the second light-emitting functional layer includes a plurality of second light-emitting units 142, and the light-shielding barrier 160 is arranged on a side of the second light-emitting functional layer away from the substrate 110, wherein in the top view direction of the display panel 100, each of the second light-emitting units 142 is arranged between two adjacent first light-emitting units 141, the light-shielding barrier 160 and the second light-emitting unit 142 are arranged in an overlapping manner, and the light-shielding barrier 160 is arranged on a side of the second light-emitting functional layer away from the substrate 110. The blocking wall 160 and the first light-emitting unit 141 are arranged non-overlappingly; the present application arranges the light-shielding blocking wall 160 and the second light-emitting unit 142 to overlap, and the light-shielding blocking wall 160 and the first light-emitting unit 141 to non-overlappingly, so that when the second light-emitting unit 142 emits light, the light-shielding blocking wall 160 can block the light emitted by the second light-emitting unit 142 in a direction perpendicular to the substrate 110, thereby making the part of the light emitted by the second light-emitting unit 142 that is not blocked by the light-shielding blocking wall 160 overlap with the light emitted by the first light-emitting unit 141 in the side direction, thereby increasing the side view light intensity of the display panel 100, and making it difficult for the human eye to see the display content clearly when viewing the screen from the side due to the bright light, so as to achieve the effect of preventing side peeping, thereby realizing the anti-peeping function of the display panel 100.

[0087] Embodiment 2

[0088] See also Figure 4 , Figure 4 A pixel driving schematic diagram of the second light-emitting unit 142 in the display panel 100 provided in the second embodiment of the present application; wherein, the structure of the display panel 100 in the second embodiment of the present application is the same as or similar to the structure of the display panel 100 in the first embodiment of the present application, and the only difference is that the second light-emitting unit 142 includes any one of a red light-emitting material layer, a green light-emitting material layer and a blue light-emitting material layer; that is, the second light-emitting unit 142 includes a first sub-light-emitting unit 1422 emitting red, a second sub-light-emitting unit 1423 emitting green and a third sub-light-emitting unit 1424 emitting blue.

[0089] Specifically, the second light-emitting functional layer includes a plurality of second light-emitting functional groups 1420 arranged along the length direction of the substrate 110 , and each of the second light-emitting functional groups 1420 includes a plurality of second light-emitting units 142 arranged along the width direction of the substrate 110 ;

[0090] The plurality of second light-emitting units 142 in the same second light-emitting function group 1420 are all electrically connected to the second pixel driving circuit 30 .

[0091] Furthermore, the light-emitting colors of the plurality of second light-emitting units 142 in the same second light-emitting functional group 1420 are the same, and the plurality of second light-emitting functional groups 1420 with the same light-emitting colors are electrically connected.

[0092] In the embodiment of the present application, the second pixel driving circuit 30 includes a first sub-driving circuit, a second sub-driving circuit and a third sub-driving circuit, the first sub-driving circuit is electrically connected to the first sub-light-emitting unit 1422, the second sub-driving circuit is electrically connected to the second sub-light-emitting unit 1423, and the third sub-driving circuit is electrically connected to the third sub-light-emitting unit 1424.

[0093] Since the luminescence lifetime of the blue luminescent material layer is greater than the luminescence lifetime of the green luminescent material layer, and the luminescence lifetime of the green luminescent material layer is greater than the luminescence lifetime of the red luminescent material layer, the area of ​​the third sub-luminescent unit 1424 is greater than the area of ​​the second sub-luminescent unit 1423, and the area of ​​the second sub-luminescent unit 1423 is greater than the area of ​​the first sub-luminescent unit 1422; thereby, when the second pixel driving circuit 30 drives multiple second light-emitting units 142 to emit light, the minimum driving current of the first sub-driving circuit is less than the minimum driving current of the second sub-driving circuit, and the minimum driving current of the second sub-driving circuit is less than the minimum driving current of the third sub-driving circuit.

[0094] The main difference between the design of the second embodiment of the present application and the first embodiment is that the second light-emitting unit 142 adopts a monochrome design, and the second light-emitting unit 142 is designed with a small opening 131 in the gap between two adjacent first light-emitting units 141. The second light-emitting unit 142 has different areas corresponding to sub-pixels of different luminous colors, and sub-pixels of different luminous colors are mixed into white light in a certain proportion.

[0095] Correspondingly, an embodiment of the present application also provides a display device, comprising a display panel 100 as described in any one of the above items and a processor, wherein the processor is used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn on an anti-peeping function, so that both the first light-emitting functional layer and the second light-emitting functional layer emit light; the processor is also used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn off the anti-peeping function, so that the first light-emitting functional layer emits light and the second light-emitting functional layer does not emit light.

[0096] The above design allows the display device to flexibly switch between a normal display mode (wide viewing angle mode) and an anti-peeping mode (narrow viewing angle mode), thereby improving the flexibility of the existing anti-peeping function of the display device.

[0097] In the embodiment of the present application, the display device may be: a mobile phone, a tablet computer, a laptop computer, a digital camera, a navigator, or other product or component with a display function.

[0098] Beneficial effect: The present application discloses a display panel 100 and a display device, wherein the display panel 100 includes a substrate 110, a first light-emitting functional layer arranged on the substrate 110, a second light-emitting functional layer arranged on the substrate 110, and a light-shielding wall 160, wherein the first light-emitting functional layer includes a plurality of first light-emitting units 141, the second light-emitting functional layer includes a plurality of second light-emitting units 142, and the light-shielding wall 160 is arranged on a side of the second light-emitting functional layer away from the substrate 110, wherein in the top view direction of the display panel 100, each of the second light-emitting units 142 is arranged between two adjacent first light-emitting units 141, the light-shielding wall 160 and the second light-emitting unit 142 are arranged in an overlapping manner, and the light-shielding wall 160 and the first The light-emitting units 141 are arranged non-overlappingly; the present application arranges the light-shielding baffle 160 and the second light-emitting unit 142 to overlap, and the light-shielding baffle 160 and the first light-emitting unit 141 to non-overlap, so that when the second light-emitting unit 142 emits light, the light-shielding baffle 160 can block the light emitted by the second light-emitting unit 142 in a direction perpendicular to the substrate 110, thereby causing part of the light emitted by the second light-emitting unit 142 that is not blocked by the light-shielding baffle 160 to overlap with the light emitted by the first light-emitting unit 141 in the lateral direction, thereby increasing the side-view light intensity of the display panel 100, thereby preventing the human eye from seeing the display content clearly due to the bright light when viewing the screen from the side, thereby achieving the effect of preventing side peeping, thereby realizing the anti-peeping function of the display panel 100.

[0099] The above is a detailed introduction to a display panel 100 and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A first light-emitting functional layer is disposed on the substrate, wherein the first light-emitting functional layer includes a plurality of first light-emitting units; A second light-emitting functional layer is disposed on the substrate, wherein the second light-emitting functional layer includes a plurality of second light-emitting units; as well as A light-shielding wall is arranged on a side of the second light-emitting functional layer away from the substrate; A pixel definition layer is disposed on the substrate and includes a plurality of openings and a groove disposed between two adjacent openings; Among them, the first light-emitting functional layer and the second light-emitting functional layer are arranged in the same layer, the first light-emitting unit is arranged in the opening, the second light-emitting unit is arranged in the groove, and in the top view direction of the display panel, each of the second light-emitting units is arranged between two adjacent first light-emitting units, the light-shielding wall and the second light-emitting unit are arranged overlappingly, and the light-shielding wall and the first light-emitting unit are arranged non-overlappingly.

2. The display panel according to claim 1, characterized in that: The display panel further includes a touch layer located on the second light-emitting functional layer and away from the substrate, and the touch layer includes: A first metal layer including a plurality of patterned driving electrodes; and A second metal layer, located on the first metal layer, comprising a plurality of patterned receiving electrodes; Wherein, the light-shielding barrier includes a plurality of the driving electrodes and / or a plurality of the receiving electrodes.

3. The display panel according to claim 2, characterized in that: The display panel further includes an encapsulation layer located between the first light-emitting functional layer and the touch control layer, the encapsulation layer including a first inorganic encapsulation layer disposed on the first light-emitting functional layer, an organic encapsulation layer disposed on the first inorganic encapsulation layer, a second inorganic encapsulation layer disposed on the organic encapsulation layer, and a third inorganic encapsulation layer disposed on the second inorganic encapsulation layer; The refractive index of the first inorganic encapsulation layer is greater than that of the organic encapsulation layer, the refractive index of the organic encapsulation layer is greater than that of the second inorganic encapsulation layer, and the refractive index of the second inorganic encapsulation layer is greater than that of the organic encapsulation layer.

4. The display panel according to claim 1, characterized in that: The first light emitting unit includes a first anode layer located in the opening, and the second light emitting unit includes a second anode layer located in the groove; The first anode layer includes a first flat portion, the second anode layer includes a second flat portion and a raised portion arranged on the second flat portion, the thickness of the second flat portion is equal to the thickness of the first flat portion, and the raised direction of the raised portion is the direction in which the pixel definition layer is away from the substrate.

5. The display panel according to claim 1, characterized in that: The display panel further includes a first pixel driving circuit and a second pixel driving circuit, wherein the first pixel driving circuit is electrically connected to the plurality of the first light emitting units, and the second pixel driving circuit is electrically connected to the plurality of the second light emitting units; The first pixel driving circuit is an active matrix driving circuit, and the second pixel driving circuit is a passive matrix driving circuit.

6. The display panel according to claim 5, characterized in that: The second light-emitting functional layer includes a plurality of second light-emitting functional groups arranged along the length direction of the substrate, and each of the second light-emitting functional groups includes a plurality of second light-emitting units arranged along the width direction of the substrate; Wherein, a plurality of the second light-emitting units in the same second light-emitting functional group are all electrically connected to the second pixel driving circuit.

7. The display panel according to claim 6, characterized in that: The light-emitting colors of the plurality of second light-emitting units in the same second light-emitting functional group are the same, and the plurality of second light-emitting functional groups with the same light-emitting color are electrically connected.

8. The display panel according to claim 7, characterized in that: The second light-emitting unit includes any one of a red light-emitting material layer, a green light-emitting material layer and a blue light-emitting material layer; The second pixel driving circuit includes a first sub-driving circuit, a second sub-driving circuit and a third sub-driving circuit, the first sub-driving circuit is electrically connected to the red light-emitting material layer, the second sub-driving circuit is electrically connected to the green light-emitting material layer, and the third sub-driving circuit is electrically connected to the blue light-emitting material layer; Among them, when the second pixel driving circuit drives multiple second light-emitting units to emit light, the minimum driving current of the first sub-driving circuit is smaller than the minimum driving current of the second sub-driving circuit, and the minimum driving current of the second sub-driving circuit is smaller than the minimum driving current of the third sub-driving circuit.

9. A display device, characterized in that: It includes a display panel and a processor as described in any one of claims 1 to 8, and the processor is used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn on the anti-peeping function, so that the first light-emitting functional layer and the second light-emitting functional layer both emit light; the processor is also used to control the pixel driving circuit to drive the first light-emitting functional layer and the second light-emitting functional layer when receiving an operation to turn off the anti-peeping function, so that the first light-emitting functional layer emits light and the second light-emitting functional layer does not emit light.

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