Display panel, manufacturing method thereof, and display device

Abstract

The embodiments of the present application provide a display panel, a method for manufacturing the same, and a display device. The display panel includes a base substrate; a thin film transistor layer disposed on the base substrate; a first electrode layer, a second electrode layer, and a light-emitting layer disposed on the side of the thin film transistor layer away from the base substrate; an encapsulation layer, the encapsulation layer including a first inorganic layer disposed on the side of the second electrode layer away from the base substrate and an organic layer disposed on the side of the first inorganic layer away from the base substrate; a color filter layer, the color filter layer including a color filter layer disposed on the side of the encapsulation layer away from the base substrate and a light-shielding layer disposed on the same layer as the color filter layer; a protective layer, the protective layer covering the color filter layer; and a touch layer, the touch layer including a third electrode layer and a fourth electrode layer disposed on the side of the protective layer away from the base substrate, and an insulating layer disposed between the third and fourth electrode layers.

Description

Technical Field

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

[0002] Currently, the touch technologies used in OLED (Organic Light-Emitting Diode) touchscreen products can be broadly categorized into external touchscreen technology and flexible multi-layer on-cell (FMLOC) technology. Touchscreen technologies are broadly classified by principle into capacitive, resistive, and infrared.

[0003] In related technologies, the touch control unit of a capacitive FMLOC touch panel includes a first electrode layer and a transmitting electrode and a receiving electrode disposed opposite the first electrode layer. During operation, parasitic capacitance forms between the first electrode layer and the electrodes of the OLED display device. This parasitic capacitance can interfere with the operation of the touch control unit, a phenomenon known as noise.

[0004] Noise can be reduced by increasing the load coverage of the touch driver chip. However, as the size of the display panel increases, the parasitic capacitance increases, and the resulting noise also increases, which in turn exceeds the maximum load capacity of the touch driver chip, potentially preventing the touch function from functioning properly and increasing the power consumption of the display panel. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a display panel, a manufacturing method thereof, and a display device, which can help reduce the noise of the OLED display device electrodes to which the touch unit is subjected during operation, thereby helping to reduce the capacitive load, improve the reliability of the touch function, and reduce the power consumption of the display panel. The specific technical solution is as follows:

[0006] In a first aspect of an embodiment of the present application, a display panel is proposed, comprising: a base substrate; a thin film transistor layer arranged on the base substrate; a first electrode layer, a second electrode layer, and a light-emitting layer located between the first electrode layer and the second electrode layer, which are arranged on a side of the thin film transistor layer away from the base substrate; an encapsulation layer, the encapsulation layer comprising a first inorganic layer arranged on a side of the second electrode layer away from the base substrate, and an organic layer arranged on a side of the first inorganic layer away from the base substrate; a color filter layer, the color filter layer comprising a color filter layer arranged on a side of the encapsulation layer away from the base substrate, and a light-shielding layer arranged on the same layer as the color filter layer; a protective layer, the protective layer covering the color filter layer; a touch layer, the touch layer comprising a third electrode layer, a fourth electrode layer, and an insulating layer located between the third electrode layer and the fourth electrode layer, which are arranged on a side of the protective layer away from the base substrate.

[0007] The embodiment of the present application adds a color filter layer and a protective layer to the display panel to reduce the parasitic capacitance between the third electrode layer and the second electrode layer. The formula for determining the capacitance is: C p =εS / d. Where, C p ε refers to the capacitance, S refers to the vertical effective contact area between the two electrode layers, ε refers to the dielectric constant of the medium between the two electrode layers, and d refers to the vertical distance between the two electrode layers. Adding a color filter layer and a protective layer increases the vertical distance between the second and third electrode layers. This reduces the parasitic capacitance formed by the second and third electrode layers, and reduces the noise interference generated by the parasitic capacitance, thereby improving the reliability of the touch function and reducing the power consumption of the display panel. Furthermore, as the vertical distance increases, the risk of water and oxygen corroding the internal components of the display panel also increases, which in turn helps improve the durability of the display panel.

[0008] The display panel according to the embodiment of the present application may also have the following additional technical features:

[0009] In some embodiments of the present application, the organic layer includes a first organic layer and a second organic layer located on a side of the first organic layer away from the base substrate.

[0010] In some embodiments of the present application, the refractive index of the second organic layer is greater than that of the first organic layer, the surface of the second organic layer close to the first organic layer has a protrusion, and the surface of the first organic layer close to the second organic layer is provided with a groove adapted to the protrusion.

[0011] In some embodiments of the present application, an opening of the groove overlaps with the light-emitting layer.

[0012] In some embodiments of the present application, the color filter layer is disposed on a surface of the second organic layer that is away from the base substrate, and the surface is substantially flat.

[0013] In some embodiments of the present application, an opening of the groove does not overlap with the light shielding layer.

[0014] In some embodiments of the present application, the cross-sectional shape of the protrusion includes an approximate trapezoid or semicircle.

[0015] In some embodiments of the present application, the light-emitting layer includes a first light-emitting layer for emitting a first color light, a second light-emitting layer for emitting a second color light, and a third light-emitting layer for emitting a third color light, which are arranged in the same layer; the color filter layer includes a first filter for displaying the first color light, a second filter for displaying the second color light, and a third filter for displaying the third color light; the first filter is arranged opposite to the first light-emitting layer in a first direction, the second filter is arranged opposite to the second light-emitting layer in the first direction, and the third filter is arranged opposite to the third light-emitting layer in the first direction, and the first direction is perpendicular to the base substrate.

[0016] In some embodiments of the present application, the encapsulation layer further includes a second inorganic layer, and the second inorganic layer is located between the first organic layer and the second organic layer.

[0017] In some embodiments of the present application, the encapsulation layer further includes a third inorganic layer, and the third inorganic layer is located between the second organic layer and the color filter layer.

[0018] In some embodiments of the present application, the dielectric constant of the first organic layer and / or the second organic layer is ≤3.0.

[0019] In some embodiments of the present application, the fourth electrode layer includes a plurality of touch drive electrodes and touch sensing electrodes orthogonally distributed in the same layer, the touch drive electrodes are insulated from the touch sensing electrodes, the plurality of touch drive electrodes are electrically connected, the insulating layer is provided with through holes, the touch sensing electrodes are electrically connected to the third electrode layer through the through holes, so that the plurality of touch sensing electrodes are bridged.

[0020] In some embodiments of the present application, the light-shielding layer is disposed between the first filter, the second filter, and the third filter.

[0021] A second aspect of the present application provides a method for manufacturing a display panel, comprising:

[0022] providing a substrate;

[0023] forming a thin film transistor layer on the base substrate;

[0024] forming a first electrode layer, a light-emitting layer, and a second electrode layer on the thin film transistor layer;

[0025] forming a first inorganic layer on the second electrode layer;

[0026] forming an organic layer on the first inorganic layer;

[0027] forming a light shielding layer and a color filter layer on the organic layer;

[0028] forming a protective layer on the light-shielding layer and the color filter layer;

[0029] A touch layer is formed on the protective layer, wherein the touch layer includes a third electrode layer and a fourth electrode layer arranged on a side of the protective layer away from the base substrate, and an insulating layer located between the third electrode layer and the fourth electrode layer.

[0030] The manufacturing method according to the embodiment of the present application may also have the following additional technical features:

[0031] In some embodiments of the present application, the step of forming an organic layer on the first inorganic layer includes:

[0032] forming a first organic layer on the first inorganic layer, wherein a surface of the first organic layer facing away from the base substrate is provided with a groove;

[0033] A second organic layer is formed on the first organic layer. The refractive index of the second organic layer is greater than that of the first organic layer. A protrusion matching the groove is provided on a surface of the second organic layer close to the first organic layer.

[0034] A third aspect of the present application provides a display device, comprising the display panel described in the first aspect.

[0035] Of course, it is not necessary to achieve all the advantages described above at the same time when implementing any product or method of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0037] Figure 1 is a schematic structural diagram of a display panel in related art;

[0038] Figure 2 is a schematic diagram of the planar structure of the fourth electrode layer;

[0039] Figure 3 This is a schematic structural diagram of a display panel according to an embodiment of the present application;

[0040] Figure 4 This is a schematic structural diagram of another display panel according to an embodiment of the present application;

[0041] Figure 5Flowchart of a method for manufacturing a display panel according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of this application.

[0043] Currently, the touch technology used in OLED (Organic Light-Emitting Diode) touchscreen products can be broadly categorized into external touchscreen and flexible multi-layer on-cell (FMLOC) touchscreen technologies. Touchscreen technologies are broadly classified by principle into capacitive, resistive, and infrared. Capacitive touchscreen technology is widely used due to its wear resistance, long lifespan, low maintenance costs, and support for multi-touch.

[0044] Capacitive touch technology can be divided into self-capacitive touch technology and mutual-capacitive touch technology. Self-capacitive touch technology refers to the touch electrodes arranged in a horizontal and vertical array forming self-capacitance with the ground or the human body, thereby detecting the touch position; mutual-capacitive touch technology refers to the insulation between multiple touch emitting electrodes and multiple touch sensing electrodes arranged in a horizontal and vertical array, forming mutual capacitance, thereby detecting the touch position. Figure 1 As shown, it is a structural schematic diagram of a mutual capacitance screen integrated (FMLOC) OLED display panel 1 in the related art. The display panel 1 includes a base substrate 2, a thin film transistor layer 3 located on the base substrate 2, a first electrode layer 4, a light-emitting layer 5, a second electrode layer 6, an encapsulation layer 7 and a touch layer 8. The first electrode layer 4 can be an anode layer, and the second electrode layer 6 can be a cathode layer. The encapsulation layer 7 includes a first inorganic layer 71, an organic layer 72 and a second inorganic layer 73. The encapsulation layer 7 is used to seal the thin film transistor layer 3, the first electrode layer 4, the light-emitting layer 5 and the second electrode layer 6 on the base substrate 2 to prevent them from being oxidized and corroded by water vapor. The light-emitting principle of the OLED display panel 1 is: under the voltage drive of the thin film transistor layer 3, the first electrode layer 4 and the second electrode layer 6 transmit holes and electrons respectively. The electrons and holes meet in the light-emitting layer 5 to form excitons and excite the light-emitting molecules in the light-emitting layer 5, and emit visible light through radiative relaxation.

[0045] The touch layer 8 includes a first insulating layer 84, a third electrode layer 81, a second insulating layer 82 and a fourth electrode layer 83. Figure 2Figure 2 shows a schematic diagram of the planar structure of the fourth electrode layer 83. The fourth electrode layer 83 includes multiple touch emitting electrodes 86 and touch sensing electrodes 87, which are orthogonally distributed horizontally and vertically within a plane. The multiple touch emitting electrodes 86 are connected, and the multiple touch sensing electrodes 87 are connected. The touch emitting electrodes 86 and the touch sensing electrodes 87 are insulated from each other. Because the touch emitting electrodes 86 and the touch sensing electrodes 87 are located on the same layer, the connections between the multiple touch emitting electrodes 86 and the multiple touch sensing electrodes 87 may overlap. To prevent the touch sensing electrodes 87 from contacting the touch emitting electrodes 86 at the overlapping locations and causing a short circuit, a third electrode layer 81 is provided on a different layer from the fourth electrode layer 83. Furthermore, a through-hole 88 is provided in the second insulating layer 82. The multiple touch sensing electrodes 87 are connected to the third electrode layer 81 through the through-hole 88, so that the multiple touch sensing electrodes 87 are bridged through the third electrode layer 81. The touch control principle is that mutual capacitance forms between multiple touch emitting electrodes 84 and touch sensing electrodes 85, which are orthogonally distributed vertically and horizontally within a plane. To detect the magnitude of the mutual capacitance, the touch emitting electrodes 84 emit an excitation signal, and the touch sensing electrodes 85 simultaneously receive the signal. This allows the capacitance values ​​of all horizontal and vertical intersections within the plane to be determined. When a finger touches the display module, it absorbs some of the capacitance, causing the mutual capacitance corresponding to the touched location to decrease. This allows the coordinates of the location where the mutual capacitance decreases to be determined, enabling precise touch control.

[0046] In the structure described above, the following problem exists: parasitic capacitance is formed between the third electrode layer 81 of the touch layer 8 and the second electrode layer 6 on the thin-film transistor layer 3, and the parasitic capacitance will cause relatively serious interference to the touch signal transmission of the touch layer 8. This interference is called noise. In some small-sized (less than 8.5 inches) display devices, the reliability and sensitivity of the touch function can be maintained by increasing the load capacity of the touch driver chip to cover the noise. However, on the one hand, increasing the load of the touch driver chip will increase the power consumption of the display device, which is not conducive to energy saving; on the other hand, when the display device is medium-sized (less than 18 inches) or even large-sized (greater than 18 inches), the vertical effective contact area between the third electrode layer 81 and the second electrode layer 6 will increase, thereby causing the parasitic capacitance to increase. The noise generated by it may exceed the maximum load capacity of the touch driver chip, which may affect the normal use of the touch function while increasing the power consumption of the display device.

[0047] Based on the above problems, Figure 2 and Figure 3As shown, in a first aspect, an embodiment of the present application provides a display panel 100, comprising: a base substrate 110, a thin film transistor layer 120 disposed on the base substrate 110, a first electrode layer 130 disposed on a side of the thin film transistor layer 120 away from the base substrate 110, a second electrode layer 140, a light-emitting layer 150 located between the first electrode layer 130 and the second electrode layer 140, an encapsulation layer 160, a color filter layer 163, a protective layer 164, and a touch layer 170. The encapsulation layer 160 comprises a first inorganic layer 161 disposed on a side of the second electrode layer 140 away from the base substrate 110, and an organic layer 162 disposed on a side of the first inorganic layer 161 away from the base substrate 110; the color filter layer 163 comprises a color filter layer 165 disposed on a side of the encapsulation layer 160 away from the base substrate 110, and a light-shielding layer 166 disposed on the same layer as the color filter layer 165; and the protective layer 164 covers the color filter layer 163. The touch layer 170 includes a third electrode layer 171 and a fourth electrode layer 173 disposed on a side of the protection layer 164 away from the base substrate 110 , and an insulating layer 172 located between the third electrode layer 171 and the fourth electrode layer 173 .

[0048] In the embodiment of the present application, the base substrate 110 is a base for carrying each layer structure, which can be a glass substrate commonly used in rigid OLED panels, or a plastic substrate such as polyimide (PI) used in flexible OLED panels, and this application does not limit it. The first electrode layer 130 can be the anode of the OLED, which is formed on the surface of the base substrate 110 by sputtering and patterning, and the second electrode layer 140 can be the cathode of the OLED, which can be formed by evaporating metal. There is also a light-emitting layer 150 between the second electrode layer 140 and the first electrode layer 130. The thin film transistor layer 120 is used to provide a driving voltage to the first electrode layer 130 and the second electrode layer 140 of the OLED, and it can generally include structures such as a gate, a gate insulating layer, an active layer, a dielectric layer, a source and drain metal layer, and a passivation layer. It should be noted that the structure of the thin film transistor layer 120 is not limited to this and can be determined according to actual needs.

[0049] In some other embodiments of the present application, a hole injection layer, an electron injection layer, a hole transport layer, an electron transport layer, a pixel definition layer (PDL) 190, and an organic support layer (PS, Post Spacer) 200 are generally included between the first electrode layer 130 and the second electrode layer 140, which are not described in detail in this application. The same layer arrangement in this application indicates that it can be formed by a simultaneous patterning process.

[0050] like Figure 3As shown, in the encapsulation layer 160, the first inorganic layer 161 can be deposited on the second electrode layer 140 via a plasma-masked chemical vapor deposition (CVD) process. This layer serves as a first water and oxygen barrier, protecting the internal OLED components from moisture. The organic layer 162 can be formed on the first inorganic layer 161 by inkjet printing of organic materials or organic coating. The surface of the organic layer 162 facing away from the first inorganic layer 161 is typically flat, thereby flattening the display panel surface.

[0051] The color filter layer 163 refers to a layer structure that is usually used to make the display panel produce red, green and blue primary colors of light to achieve full-color display. It generally includes a color filter layer 165 and a light-shielding layer 166. The color filter layer 165 includes red, green and blue color filters, and can be formed into films by inkjet printing, organic coating, etc., and formed by exposure, development, and graphics. In the embodiment of the present application, a color filter layer 163 is provided in the OLED display panel to improve the light output efficiency of the panel, thereby helping to reduce the power consumption of the panel. The light-shielding layer 166 is provided between the three color filters to separate the color filters and prevent color confusion and light leakage. The protective layer 164 is covered on the color filter layer 163 by chemical vapor deposition through a maskless template process to form a second water and oxygen barrier layer to provide secondary protection for the interior of the display panel 100.

[0052] The embodiment of the present application adds a color filter layer 163 and a protective layer 164 on the encapsulation layer 160 of the OLED display panel to reduce the parasitic capacitance between the third electrode layer 171 and the second electrode layer 140. The formula for determining the capacitance is: C p =εS / d. Where, C p Refers to the size of the capacitance, S refers to the vertical effective contact area between the two electrode layers, ε refers to the dielectric constant of the medium between the two electrode layers, and d refers to the vertical distance between the two electrode layers. By adding the color filter layer 163 and the protective layer 164, it is beneficial to increase the vertical distance between the second electrode layer 140 and the third electrode layer 171. In this way, the parasitic capacitance formed by the second electrode layer 140 and the third electrode layer 171 will be reduced, and the noise interference generated by the parasitic capacitance will also be reduced, which will help improve the reliability of the touch function and reduce the power consumption of the display panel. At the same time, after the vertical distance increases, the travel of water and oxygen erosion of the internal components of the display panel 100 also increases, which is also beneficial to improve the durability of the display panel 100.

[0053] In some embodiments of the present application, Figure 3As shown, the organic layer 162 includes a first organic layer 167 and a second organic layer 168 located on a side of the first organic layer 167 away from the base substrate 110. In the embodiment of the present application, the organic layer 162 has a multi-layer structure, including the first organic layer 167 and the second organic layer 168. The multi-layered organic layer 162 structure further increases the vertical distance between the second electrode layer 140 and the third electrode layer 171, thereby further reducing parasitic capacitance, improving the reliability of the touch function, and reducing the power consumption of the display panel.

[0054] Furthermore, the refractive index of the second organic layer 168 is greater than the refractive index of the first organic layer 167. The surface of the second organic layer 168 close to the first organic layer 167 has a protrusion 1681, and the surface of the first organic layer 167 close to the second organic layer 168 is provided with a groove 1671 adapted to the protrusion 1681. In the embodiment of the present application, the refractive index of the second organic layer 168 is greater than the refractive index of the first organic layer 167. Figure 3 Figure 1 is a schematic diagram of the transmission of light E from the light-emitting layer 150. Because the refractive index of the second organic layer 168 is greater than that of the first organic layer 167, and the junction between the second organic layer 168 and the first organic layer 167 is roughly a prism structure with a combination of protrusions and recesses, when light from the light-emitting layer 150 is emitted from the display panel instead of directly above it, it is refracted by the prism structure at the junction of the first and second organic layers 167 and 168, causing the deviated light E to be refracted toward and emitted directly above the display panel. This helps improve light utilization and the light extraction efficiency of the display panel 100.

[0055] Furthermore, the opening of the groove 1671 overlaps with the light-emitting layer 150. Thus, the first organic layer 167 and the second organic layer 168 located above the light-emitting layer 150 are substantially convex lens structures, which have a convergence effect on light, causing the light to converge toward the area above the light-emitting layer 150, thereby facilitating increased light intensity above the light-emitting layer 150 and improving light utilization.

[0056] Furthermore, the opening of the groove 1671 does not overlap with the light shielding layer 166. In this way, the light from the light emitting layer 150 will not be blocked by the light shielding layer 166, thereby facilitating the improvement of the light extraction efficiency of the display panel.

[0057] In some embodiments of the present application, Figure 3As shown, the color filter layer 165 is disposed on a substantially flat surface 1682 of the second organic layer 168 on the side facing away from the base substrate 110. This surface 1682 is substantially flat. Specifically, the surface 1682 of the second organic layer 168 facing away from the base substrate 110 is planarized before the color filter layer 165 is formed on this surface 1682. This facilitates the processing of the color filter layer 165 and facilitates the planarization of the display panel 100. Furthermore, the substantially flat surface 1682 facilitates the collimation of light from the light-emitting layer 150 after passing through the surface 1682 and entering the color filter layer 165, thereby improving light utilization and the light extraction efficiency of the display panel 100.

[0058] In other embodiments of the present application, the cross-sectional shape of the protrusion 1681 includes a trapezoidal or semicircular shape. When the cross-sectional shape of the protrusion 1681 is trapezoidal, the junction between the second organic layer 168 and the first organic layer 167 is formed by a concave and convex surface. This arrangement facilitates the processing of the organic layers. When the cross-sectional shape of the protrusion 1681 is semicircular, the junction between the second organic layer 168 and the first organic layer 167 forms a convex lens-like structure, which helps to improve the convergence effect of scattered light after passing through the convex lens at the junction, thereby improving light utilization.

[0059] Furthermore, the light-emitting layer 150 includes a first light-emitting layer 151 for emitting a first color light, a second light-emitting layer 152 for emitting a second color light, and a third light-emitting layer 153 for emitting a third color light, which are arranged in the same layer; the color filter layer 165 includes a first filter 1651 for displaying the first color light, a second filter 1652 for displaying the second color light, and a third filter 1653 for displaying the third color light; the first filter 1651 is arranged opposite to the first light-emitting layer 150 in a first direction, the second filter 1652 is arranged opposite to the second light-emitting layer 150 in the first direction, and the third filter 1653 is arranged opposite to the third light-emitting layer 150 in the first direction, and the first direction is perpendicular to the base substrate 110.

[0060] The light-emitting layer 150 includes a first light-emitting layer 151, a second light-emitting layer 152, and a third light-emitting layer 153. That is, the light-emitting layer 150 of the present embodiment includes three light-emitting layers that emit light of different colors. Correspondingly, the color filter layer 165 includes a first filter 1651, a second filter 1652, and a third filter 1653. In a first direction, the first light-emitting layer 151, which emits light of a first color, is positioned opposite the first filter 1651 that displays the first color; the second light-emitting layer 152, which emits light of a second color, is positioned opposite the second filter 1652 that displays the second color; and the third light-emitting layer 153, which emits light of a third color, is positioned opposite the third filter 1653 that displays the third color. The first color can be red, the second color can be green, and the third color can be blue. In other words, the light-emitting layers of the same color face the filters, resulting in a high transmittance for the display panel 100, which in turn improves the brightness of the display panel. This high transmittance also helps reduce the power consumption of the display panel 100. On the other hand, when the light emitted by each light-emitting layer passes through the first organic layer 167 and the second organic layer 168, refraction will occur, so that more light is emitted from directly above the display panel 100. The light then passes through the various filters of the color filter layer 165 to further enhance the light output efficiency, which is beneficial to further increase the light intensity, thereby reducing the power consumption of the display panel 100.

[0061] In some embodiments of the present application, Figure 4 As shown, the encapsulation layer 160 further includes a second inorganic layer 169, which is located between the first organic layer 167 and the second organic layer 168. The second inorganic layer 169 can be deposited on the first organic layer 167 by chemical vapor deposition. The provision of the second inorganic layer 169 helps improve the adhesion between the film layers, improves the leveling of the first organic layer 167, and thus improves the surface performance of the panel.

[0062] In some embodiments of the present application, Figure 4 As shown, the encapsulation layer 160 further includes a third inorganic layer 180, which is located between the second organic layer 168 and the color filter layer 163. The third inorganic layer 180 can be deposited on the second organic layer 168 by chemical vapor deposition. The provision of the third inorganic layer 180 helps improve the adhesion between the film layers, improves the leveling of the second organic layer 168, and thus improves the surface performance of the panel.

[0063] In some embodiments of the present application, the dielectric constant of the first organic layer 167 and / or the second organic layer 168 is ≤3.0. In the embodiments of the present application, the first organic layer 167 and / or the second organic layer 168 can be formed using an organic material with a dielectric constant ε ≤3.0. This helps further reduce the capacitive load formed by the second electrode layer 140 and the third electrode layer 171, reduces signal noise, and further helps reduce power consumption of the display panel 100.

[0064] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the fourth electrode layer 173 includes multiple touch driving electrodes 174 and touch sensing electrodes 175 distributed orthogonally in the same layer. The touch driving electrodes 174 are insulated from the touch sensing electrodes 175 and are electrically connected to each other. The insulating layer 172 is provided with through-holes 176, and the touch sensing electrodes 175 are electrically connected to the third electrode layer 171 through the through-holes 176, thereby bridging the multiple touch sensing electrodes 175. Because the touch driving electrodes 174 and the touch sensing electrodes 175 are located on the same layer, there may be overlap at the junctions between the multiple touch driving electrodes 174 and the multiple touch sensing electrodes 175. To prevent short circuits caused by contact between the touch sensing electrodes 175 and the touch driving electrodes 174 at the overlapping junctions, the third electrode layer 171 is provided on a different layer from the fourth electrode layer 83. Meanwhile, through holes 176 are provided on the insulating layer 172 , and the touch sensing electrodes 175 are connected to the third electrode layer 171 through the through holes 176 , so that the touch sensing electrodes 175 are bridged through the third electrode layer 171 , thereby achieving a touch function.

[0065] In some embodiments of the present application, a light shielding layer 166 is disposed between the first filter 1651, the second filter 1652, and the third filter 1653. The light shielding layer 166 can be formed using a black organic material through inkjet printing, organic coating, or other methods. It is used to separate the filters and prevent confusion between the colors. Furthermore, the light shielding layer 166 can reduce light leakage from the display panel 100 and improve the contrast of the display panel 100.

[0066] like Figure 5 As shown, the second aspect of the present application proposes a method for manufacturing a display panel 100, comprising:

[0067] Providing a base substrate 110;

[0068] forming a thin film transistor layer 120 on a base substrate 110;

[0069] A first electrode layer 130 , a light emitting layer 150 and a second electrode layer 140 are formed on the thin film transistor layer 120 ;

[0070] forming a first inorganic layer 161 on the second electrode layer 140;

[0071] forming an organic layer 162 on the first inorganic layer 161;

[0072] A light shielding layer 166 and a color filter layer 165 are formed on the organic layer 162 ;

[0073] forming a protective layer 164 on the light shielding layer 166 and the color filter layer 165;

[0074] A touch layer 170 is formed on the protection layer 164 . The touch layer 170 includes a third electrode layer 171 and a fourth electrode layer 173 , which are located on a side of the protection layer 164 away from the base substrate 110 , and an insulating layer 172 between the third electrode layer 171 and the fourth electrode layer 173 .

[0075] The embodiment of the present application specifically describes a method for manufacturing a display panel 100. A thin film transistor layer 120 is formed on a base substrate 110 by photolithography. On the thin film transistor layer 120 having pixel driving capability, a first electrode layer 130 is formed by sputtering and patterning, and the first electrode layer 130 serves as an anode; a light-emitting layer 150 is formed by evaporation; and a second electrode layer 140 is formed by evaporation of metal. Typically, a pixel definition layer 190 and an organic support layer 200 formed by processes such as coating, exposure, and development may also be included between the first electrode layer 130 and the second electrode layer 140, and the light-emitting layer 150 is located between the pixel definition layers 190. A first inorganic layer 161 is formed by plasma chemical vapor deposition; and an organic layer 162 is formed by inkjet printing of organic materials or organic coating. The surface of the organic layer 162 on the side away from the base substrate 110 may be flat, which is beneficial to the flattening of the display panel 100. A black organic material is formed by inkjet printing, organic coating, or other methods, followed by exposure, development, and patterning to form a light-shielding layer 166 (Black Matrix, BM). A color filter layer 165 is formed by inkjet printing, organic coating, or other methods, followed by exposure, development, and patterning. The color filter layer 165 and light-shielding layer 166 are patterned simultaneously. A protective layer 164 is formed by chemical vapor deposition using a maskless process. A touch layer 170 is formed on the protective layer 164. This touch layer 170 includes a third electrode layer 171 formed by sputtering and patterning, an insulating layer 172 formed by chemical vapor deposition, and a fourth electrode layer 173 formed by sputtering and patterning.

[0076] The display panel 100 formed by the display panel manufacturing method according to the embodiment of the present application facilitates increasing the vertical distance between the second electrode layer 140 and the third electrode layer 171. This reduces the parasitic capacitance formed by the second electrode layer 140 and the third electrode layer 171, and reduces the noise interference generated by the parasitic capacitance, thereby improving the reliability of the touch function and reducing the power consumption of the display panel 100. Furthermore, the increased vertical distance increases the risk of water and oxygen corroding the internal components of the display panel 100, which further improves the durability of the display panel 100.

[0077] In some embodiments of the present application, the step of forming the organic layer 162 on the first inorganic layer 161 includes:

[0078] A first organic layer 167 is formed on the first inorganic layer 161 , and a groove is provided on a surface of the first organic layer 167 facing away from the base substrate 110 ;

[0079] A second organic layer 168 is formed on the first organic layer 167 . The refractive index of the second organic layer 168 is greater than that of the first organic layer 167 . A protrusion matching the groove is provided on the surface of the second organic layer 168 close to the first organic layer 167 .

[0080] Since the refractive index of the second organic layer 168 is greater than the refractive index of the first organic layer 167, and the junction of the second organic layer 168 and the first organic layer 167 is roughly a prism structure with protrusions and recesses, when the light of the light-emitting layer 150 is not emitted from directly above the display panel, but emitted from the side away from directly above the display panel, it will be refracted when passing through the prism structure at the junction of the first organic layer 167 and the second organic layer 168, so that the deviated light is refracted to be emitted directly above the display panel. This is beneficial to improving the utilization rate of light and the light output efficiency of the display panel.

[0081] A third aspect of the present application provides a display device, comprising the display panel 100 described in the first aspect.

[0082] The display device of the embodiment of the present application uses the display panel 100 described in the first aspect. The display panel 100 increases the vertical distance between the second electrode layer 140 and the third electrode layer 171 by adding a color filter layer 163 and a protective layer 164 on the encapsulation layer 160. In this way, the parasitic capacitance formed by the second electrode layer 140 and the third electrode layer 171 will be reduced, and the noise interference generated by the parasitic capacitance will also be reduced, thereby improving the reliability of the touch function and reducing the power consumption of the display device. At the same time, as the vertical distance increases, the distance for water and oxygen to corrode the internal components of the display device also increases, which is also beneficial to improving the durability of the display device.

[0083] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0084] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0085] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A thin film transistor layer is provided on the base substrate; a first electrode layer, a second electrode layer, and a light-emitting layer located between the first electrode layer and the second electrode layer, provided on a side of the thin film transistor layer away from the base substrate; an encapsulation layer, the encapsulation layer comprising a first inorganic layer disposed on a side of the second electrode layer away from the base substrate and an organic layer disposed on a side of the first inorganic layer away from the base substrate; a color filter layer, the color filter layer comprising a color filter layer disposed on a side of the encapsulation layer away from the base substrate and a light shielding layer disposed on the same layer as the color filter layer; a protective layer, the protective layer covering the color filter layer; a touch layer, the touch layer comprising a third electrode layer and a fourth electrode layer disposed on a side of the protective layer away from the base substrate, and an insulating layer located between the third electrode layer and the fourth electrode layer; The organic layer is located between the second electrode layer and the third electrode layer of the touch layer, and the organic layer includes a first organic layer and a second organic layer located on a side of the first organic layer away from the base substrate; the refractive index of the second organic layer is greater than the refractive index of the first organic layer, the surface of the second organic layer close to the first organic layer has a protrusion, and the surface of the first organic layer close to the second organic layer is provided with a groove adapted to the protrusion.

2. The display panel according to claim 1, wherein: An opening of the groove overlaps with the light emitting layer.

3. The display panel according to claim 1, wherein: The color filter layer is arranged on a surface of the second organic layer on a side away from the base substrate, and the surface is substantially flat.

4. The display panel according to claim 2, wherein: An opening of the groove does not overlap with the light shielding layer.

5. The display panel according to claim 1, wherein: The cross-sectional shape of the protrusion includes approximately trapezoidal or semicircular.

6. The display panel according to claim 1, wherein: The light-emitting layer includes a first light-emitting layer for emitting a first color light, a second light-emitting layer for emitting a second color light, and a third light-emitting layer for emitting a third color light, which are arranged in the same layer; The color filter layer includes a first filter for displaying the first color light, a second filter for displaying the second color light, and a third filter for displaying the third color light; The first filter is arranged opposite to the first light-emitting layer in a first direction, the second filter is arranged opposite to the second light-emitting layer in the first direction, and the third filter is arranged opposite to the third light-emitting layer in the first direction. The first direction is perpendicular to the base substrate.

7. The display panel according to claim 1, wherein: The encapsulation layer further includes a second inorganic layer, and the second inorganic layer is located between the first organic layer and the second organic layer.

8. The display panel according to claim 1, wherein: The encapsulation layer further includes a third inorganic layer, and the third inorganic layer is located between the second organic layer and the color filter layer.

9. The display panel according to claim 1, wherein: The dielectric constant of the first organic layer and / or the second organic layer is ≤3.

0.

10. The display panel according to claim 1, wherein The fourth electrode layer includes a plurality of touch driving electrodes and touch sensing electrodes orthogonally distributed in the same layer, the touch driving electrodes are insulated from the touch sensing electrodes, the plurality of touch driving electrodes are electrically connected, the insulating layer is provided with through holes, the touch sensing electrodes are electrically connected to the third electrode layer through the through holes, so that the plurality of touch sensing electrodes are bridged.

11. The display panel according to claim 6, wherein: The light shielding layer is disposed between the first filter, the second filter, and the third filter.

12. A method for manufacturing a display panel, characterized in that: include: providing a substrate; forming a thin film transistor layer on the base substrate; forming a first electrode layer, a light-emitting layer, and a second electrode layer on the thin film transistor layer; forming a first inorganic layer on the second electrode layer; forming an organic layer on the first inorganic layer; forming a light shielding layer and a color filter layer on the organic layer; forming a protective layer on the light-shielding layer and the color filter layer; forming a touch layer on the protective layer, the touch layer comprising a third electrode layer and a fourth electrode layer disposed on a side of the protective layer away from the base substrate, and an insulating layer located between the third electrode layer and the fourth electrode layer; The organic layer is located between the second electrode layer and the third electrode layer of the touch layer; The step of forming an organic layer on the first inorganic layer includes: forming a first organic layer on the first inorganic layer, wherein a surface of the first organic layer facing away from the base substrate is provided with a groove; A second organic layer is formed on the first organic layer. The refractive index of the second organic layer is greater than that of the first organic layer. A protrusion matching the groove is provided on a surface of the second organic layer close to the first organic layer.

13. A display device comprising the display panel according to any one of claims 1 to 11.

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