Display panel

Abstract

This application provides a display panel comprising a substrate, a light-emitting device layer, a touch layer, a color filter layer, and a filling layer. The light-emitting device layer has multiple light-emitting devices. The touch layer is disposed on the light-emitting device layer and includes an inorganic insulating layer and a touch metal layer. The inorganic insulating layer includes multiple spaced protrusions that overlap with the light-emitting devices. The color filter layer has multiple filter units that surround corresponding protrusions and have openings above the protrusions. The filling layer at least fills the openings. Because the refractive index of the inorganic insulating layer is greater than that of the filter units, and the refractive index of the filling layer is greater than that of the filter units, light can be refracted at the interface between the protrusions and the filter units, or totally internally reflected at the interface between the filter units and the filling layer. This reduces the light emission angle and increases the amount of light emitted, thereby improving the light emission efficiency of the light-emitting devices and reducing the power consumption of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel. Background Technology

[0002] Display panels for electronic devices mainly include several types such as liquid crystal display (LCD), plasma display panel (PDP), organic light emitting diode (OLED) display panel, and active-matrix organic light emitting diode (AMOLED) display panel, which have a wide range of applications in products such as automobiles, mobile phones, tablets, computers, and televisions.

[0003] Polarizing films can effectively reduce the reflectivity of OLED display panels under strong light, but at the cost of nearly 58% light emission. This significantly increases the lifespan burden of OLED display panels. On the other hand, polarizing films are relatively thick and brittle, which is not conducive to the development of dynamically bending products.

[0004] The use of a color filter instead of a polarizer (POL) is classified as POL-less (depolarizer) technology. Combining traditional direct on-cell touch (DOT) structures with POL-less structures requires consideration of their relative positions. Placing the DOT structure above the POL-less structure increases the POL-less's transmittance, but the high reflectivity of the metal mesh in the DOT's touch layer means the display's reflectivity remains high even under sunlight, sometimes revealing the metal mesh's shadow and impacting user experience. Placing the DOT structure below the POL-less structure, while the black matrix can block the DOT's metal mesh, the significant distance between the POL-less structure and the light-emitting device (separated by the encapsulation layer and the DOT structure) means a large portion of the light will be absorbed or blocked by the black matrix, severely affecting the display's transmittance. To maintain display quality, the brightness must be increased, but this significantly increases power consumption.

[0005] Therefore, it is necessary to provide a display panel to improve this deficiency. Summary of the Invention

[0006] The embodiments of this application provide a display panel that can improve the light emission efficiency of the light-emitting device and reduce the power consumption of the display panel.

[0007] Embodiments of this application provide a display panel, including:

[0008] substrate;

[0009] A light-emitting device layer is disposed on the substrate, and the light-emitting device layer has a plurality of light-emitting devices;

[0010] A touch layer is disposed on the light-emitting device layer. The touch layer includes an inorganic insulating layer and a touch metal layer disposed on the inorganic insulating layer. The inorganic insulating layer includes a plurality of spaced protrusions. The orthographic projection of the protrusions on the substrate overlaps with the orthographic projection of the light-emitting device on the substrate.

[0011] A color filter layer has multiple filter units, each filter unit surrounding a corresponding protrusion, the filter unit having an opening above the protrusion, and the refractive index of the inorganic insulating layer being greater than the refractive index of the filter unit; and

[0012] A filling layer that at least fills the opening, wherein the refractive index of the filling layer is greater than the refractive index of the filter unit.

[0013] According to one embodiment of this application, the orthographic projection of the filter unit on the substrate is offset from the orthographic projection of the light-emitting device on the substrate, and surrounds the orthographic projection of the light-emitting device on the substrate.

[0014] According to one embodiment of this application, the angle between the sidewall of the protrusion and the surface of the protrusion near the light-emitting device is an acute angle, and the width of the protrusion gradually decreases from the end near the light-emitting device to the end away from the light-emitting device.

[0015] According to one embodiment of this application, the angle between the sidewall of the protrusion and the surface of the protrusion near the light-emitting device is greater than or equal to 5 degrees and less than or equal to 80 degrees.

[0016] According to one embodiment of this application, the angle between the sidewall of the opening and the bottom surface of the opening is an obtuse angle, and the width of the opening gradually increases from the end closer to the light-emitting device to the end farther away from the light-emitting device.

[0017] According to one embodiment of this application, the protrusion includes a first part and a second part, the second part is disposed on the surface of the first part away from the substrate, the inorganic insulating layer includes a first inorganic insulating layer and a second inorganic insulating layer, the second inorganic insulating layer is disposed on the surface of the first inorganic insulating layer away from the substrate, the first part is made of the same material as the first inorganic insulating layer and is disposed in the same layer, and the second part is made of the same material as the second inorganic insulating layer and is disposed in the same layer.

[0018] Wherein, the refractive index of the first inorganic insulating layer is greater than or equal to the refractive index of the second inorganic insulating layer.

[0019] According to one embodiment of this application, the refractive indices of the first inorganic insulating layer and the second inorganic insulating layer are equal, and the refractive indices of the first inorganic insulating layer and the second inorganic insulating layer are both greater than or equal to 1.6 and less than or equal to 1.8.

[0020] According to one embodiment of this application, the refractive index of the first inorganic insulating layer is greater than or equal to 1.6 and less than or equal to 1.8, and the refractive index of the second inorganic insulating layer is greater than or equal to 1.3 and less than or equal to 1.5.

[0021] According to one embodiment of this application, the inorganic insulating layer further includes a dam, which is disposed around the protrusion and between the filter units of different colors, and the filter units fill the gap between the protrusion and the dam;

[0022] The orthographic projection of the dam on the substrate is offset from the orthographic projection of the light-emitting device on the substrate, and the touch metal layer is disposed on the dam.

[0023] According to one embodiment of this application, the display panel further includes a light-shielding layer, which is disposed on the dam and located on the side of the touch metal layer opposite to the substrate;

[0024] Wherein, the orthogonal projection of the light-shielding layer on the substrate covers the orthogonal projection of the touch metal layer on the substrate.

[0025] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display panel, which includes a substrate, a light-emitting device layer, a touch layer, a color filter layer, and a filler layer. The light-emitting device layer is disposed on the substrate and has multiple light-emitting devices. The touch layer is disposed on the light-emitting device layer and includes an inorganic insulating layer and a touch metal layer disposed on the inorganic insulating layer. The inorganic insulating layer includes multiple spaced protrusions, the orthographic projection of which onto the substrate overlaps with the orthographic projection of which onto the substrate. The color filter layer has multiple filter units, each filter unit surrounding a corresponding protrusion. The filter unit has an opening located above the protrusion, and the filling layer at least fills the opening. On the one hand, since the refractive index of the inorganic insulating layer is greater than that of the filter unit, some light can be refracted at the interface between the protrusion and the filter unit, thereby reducing the emission angle of this part of the light and increasing the amount of light emitted. On the other hand, since the refractive index of the filling layer is greater than that of the filter unit, some light can be totally internally reflected at the interface between the filter unit and the filling layer, thereby reducing the emission angle of this part of the light and further increasing the amount of light emitted, thereby improving the light emission efficiency of the light-emitting device and reducing the power consumption of the display panel. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of a display panel provided for an embodiment of this application;

[0027] Figure 2 A top view of the filter unit and light-emitting device provided for embodiments of this application;

[0028] Figure 3 A schematic diagram of the optical path provided for an embodiment of this application;

[0029] Figures 4a to 4b A schematic flowchart illustrating the manufacturing method of a display panel provided in an embodiment of this application. Detailed Implementation

[0030] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative and understanding purposes and not for limiting the application. In the figures, structurally similar units are represented by the same reference numerals.

[0031] The present application will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] The embodiments of this application provide a display panel that can improve the light emission efficiency of the light-emitting device and reduce the power consumption of the display panel.

[0033] Please see Figure 1 , Figure 1 The schematic diagram of the structure of the display panel provided in the embodiment of this application shows that the display panel includes a substrate 1, a light-emitting device layer 2 and a touch layer 3. The light-emitting device layer 2 is disposed on the substrate 1 and the touch layer 3 is disposed on the light-emitting device layer 2.

[0034] It should be noted that the light-emitting device layer 2 is disposed on the substrate 1, which can mean that the light-emitting device layer 2 is located above the substrate 1 and the light-emitting device layer 2 and the substrate 1 can be separated by an organic layer or an inorganic layer; or it can mean that the light-emitting device layer 2 is located above the substrate 1 and the light-emitting device layer 2 is in direct contact with the surface of the substrate 1.

[0035] In the embodiments of this application, substrate 1 is an array substrate. Substrate 1 may include a substrate and a driving circuit layer disposed on the substrate. The driving circuit layer has a pixel driving circuit for driving the light-emitting device 20 in the light-emitting device layer 2 to emit light. The pixel driving circuit may be composed of thin-film transistors, capacitors, data lines, scan lines, etc. The film layer structure of the driving circuit layer may refer to existing display panels and is not limited here. The light-emitting device layer 2 is disposed on the side of the driving circuit layer opposite to the substrate.

[0036] The light-emitting device layer 2 may include a plurality of light-emitting devices 20, which are arranged in an array on the substrate 1 according to a pixel arrangement. In the embodiments of this application, the light-emitting device is an organic light-emitting diode (OLED). In some other embodiments, the type of light-emitting device is not limited to organic light-emitting diodes, but may also be a mini-LED or a micro-LED chip.

[0037] In one embodiment, such as Figure 1 As shown, the light-emitting device layer 2 includes multiple first light-emitting devices 21, multiple second light-emitting devices 22, and multiple third light-emitting devices 23. The first light-emitting devices 21 emit light of a different color than the second light-emitting devices 22 and the third light-emitting devices 23. For example, the first light-emitting device 21 emits red light, the second light-emitting device 22 emits green light, and the third light-emitting device 23 emits blue light. In practical applications, the color of the light emitted by the light-emitting devices is not limited to the three colors of red, green, and blue in the above example; it can also be other colors, such as white light, purple light, or yellow light, etc., without limitation here.

[0038] It should be noted that the touch layer 3 is disposed on the light-emitting device layer 2, which means that the touch layer 3 is located above the light-emitting device layer 2, and the touch layer 3 and the light-emitting device layer 2 are separated by an encapsulation layer, an organic layer or an inorganic layer.

[0039] In the embodiments of this application, such as Figure 1As shown, the display panel also includes an encapsulation layer 4, which is disposed between the light-emitting device layer 2 and the touch layer 3. The encapsulation layer 4 can be a thin-film encapsulation structure formed by stacking inorganic and organic layers. For example, the encapsulation layer 4 may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially. The materials of the first inorganic encapsulation layer and the second inorganic encapsulation layer may be, but are not limited to, transparent inorganic materials such as silicon nitride, silicon oxide, or silicon oxynitride.

[0040] In some other embodiments, a planarization layer (not shown in the figure) may also be provided on the encapsulation layer 4, and the touch layer 3 may be provided on the surface of the planarization layer away from the encapsulation layer 4. By providing the planarization layer, the flatness of the touch layer 3 can be ensured.

[0041] The display panel also includes a color filter layer 5, which has multiple filter units 50 arranged in an array according to the pixel arrangement. Each light-emitting device 20 has a corresponding filter unit 50, that is, each light-emitting device 20 has a filter unit 50 with the same color as the emitted light on its light-emitting side. The color filter layer 5 can replace the polarizer and play the same role as the polarizer.

[0042] In the embodiments of this application, please refer to Figure 1 The color filter layer 5 includes a first filter unit 51, a second filter unit 52, and a third filter unit 53. Taking the first filter unit 51 as an example, the first filter unit 51 is disposed on the light-emitting side of the first light-emitting device 21. The first light-emitting device 21 emits red light, and the first filter unit 51 is a red filter unit. The material of the first filter unit 51 is red photoresist, and the first filter unit 51 can transmit red light. The second filter unit 52 is a green filter unit, and the material of the second filter unit 52 is green photoresist. The third filter unit 53 is a blue filter unit, and the material of the third filter unit 53 is blue photoresist.

[0043] Please see Figure 1 The touch layer 3 includes an inorganic insulating layer 31 and a touch metal layer 32. The touch metal layer 32 is disposed on the inorganic insulating layer 31 and may contain touch electrodes and touch signal traces. The inorganic insulating layer 31 has a plurality of spaced protrusions 311, which are in the shape of bosses. The orthographic projection of each protrusion 311 on the substrate 1 overlaps with the orthographic projection of a corresponding light-emitting device 20 on the substrate 1.

[0044] Combination Figure 1 and Figure 2 As shown, Figure 2The above view shows the filter unit and light-emitting device provided in the embodiments of this application. Each filter unit 50 surrounds a corresponding protrusion 311. The filter unit 50 has an opening 501 located above the protrusion 311. The opening 501 penetrates the filter unit 50 in the thickness direction of the display panel. The bottom of the opening 501 is the surface of the protrusion 311 away from the light-emitting device 20, that is, the middle area above the protrusion 311 is not covered by the filter unit 50.

[0045] In the embodiments of this application, the refractive index of the inorganic insulating layer 31 is greater than the refractive index of the filter unit 50. The protrusion 311 can be formed by etching the inorganic insulating layer 31. Since the protrusion 311 is part of the inorganic insulating layer 31, the refractive index of the protrusion 311 is also greater than the refractive index of the filter unit 50.

[0046] Combination Figure 1 and Figure 3 As shown, taking the first light-emitting device 21 as an example, since the refractive index of the protrusion 311 is greater than that of the filter unit 50, the light ① emitted by the first light-emitting device 21 is refracted at the interface between the protrusion 311 and the filter unit 50. The angle of refraction is greater than the angle of incidence, and the exit angle of the light ① is reduced. This increases the amount of light emitted from small-angle exiting light, thereby improving the luminous efficiency of the light-emitting device 20 and reducing the power consumption of the display panel. The effects of other light-emitting devices (such as the second light-emitting device 22 and the third light-emitting device 23) can be referred to the first light-emitting device 21, and no limitation is made here.

[0047] In some embodiments, the protrusion 311 includes a first part 3111 and a second part 3112, the second part 3112 being disposed on the surface of the first part 3111 facing away from the substrate 1, and the first part 3111 and the second part 3112 having the same material and refractive index.

[0048] In some embodiments, the materials of the first part 3111 and the second part 3112 are both silicon nitride, the refractive index of the first part 3111 and the second part 3112 is greater than or equal to 1.6 and less than or equal to 1.8, and the refractive index of the filter unit 50 is greater than or equal to 1.3 and less than or equal to 1.5, that is, the refractive index of the first filter unit 51, the second filter unit 52 and the third filter unit 53 are all between 1.3 and 1.5.

[0049] For example, in one specific embodiment, the refractive index of both the first part 3111 and the second part 3112 is 1.6, the refractive index of the first filter unit 51 is 1.3, the refractive index of the second filter unit 52 is 1.4, and the refractive index of the third filter unit 53 is 1.5; in another specific embodiment, the refractive index of both the first part 3111 and the second part 3112 is 1.7, the refractive index of the first filter unit 51 is 1.4, the refractive index of the second filter unit 52 is 1.5, and the refractive index of the third filter unit 53 is 1.4; in yet another specific embodiment, the refractive index of both the first part 3111 and the second part 3112 is 1.8, the refractive index of the first filter unit 51 is 1.5, the refractive index of the second filter unit 52 is 1.3, and the refractive index of the third filter unit 53 is 1.3.

[0050] Furthermore, the inorganic insulating layer 31 includes a first inorganic insulating layer 3101 and a second inorganic insulating layer 3102. The first part 3111 is made of the same material as the first inorganic insulating layer 3101 and is disposed in the same layer, that is, the first part 3111 and the first inorganic insulating layer 3101 can be prepared by the same chemical vapor deposition process. The second part 3112 is made of the same material as the second inorganic insulating layer 3102 and is disposed in the same layer, that is, the second part 3112 and the second inorganic insulating layer 3102 can be prepared by the same chemical vapor deposition process.

[0051] In some embodiments, the first part 3111 and the second part 3112 are made of different materials and have different refractive indices.

[0052] In some embodiments, the first part 3111 is made of silicon nitride, and its refractive index is greater than or equal to 1.6 and less than or equal to 1.8. The second part 3112 is made of silicon oxide, and its refractive index is greater than or equal to 1.3 and less than or equal to 1.5. In this structure, by making the refractive index of the second part 3112 less than that of the first part 3111, the light emitted by the light-emitting device 20 can be refracted at the interface between the first part 3111 and the second part 3112, thereby reducing the light emission angle. When the light passes through the interface between the protrusion 311 and the filter unit 50, it will be refracted again, thereby further reducing the light emission angle. This can further increase the amount of light emitted at small angles and improve the light emission efficiency of the light-emitting device 20.

[0053] For example, in one embodiment, the refractive index of the first part 3111 is 1.6 and the refractive index of the second part 3112 is 1.4; in another embodiment, the refractive index of the first part 3111 is 1.7 and the refractive index of the second part 3112 is 1.5; in yet another embodiment, the refractive index of the first part 3111 is 1.8 and the refractive index of the second part 3112 is 1.3.

[0054] Furthermore, in a structure where the materials and refractive indices of the first part 3111 and the second part 3112 are different, the materials and refractive indices of the first inorganic insulating layer 3101 and the second inorganic insulating layer 3102 are also different. For example, the materials of the first inorganic insulating layer 3101 and the first part 3111 are both silicon nitride, while the materials of the second insulating layer 3102 and the second part 3112 are both silicon oxide.

[0055] In one embodiment, each protrusion 311 and a corresponding light-emitting device 20 are disposed opposite each other in the thickness direction of the display panel, and the orthographic projection of each protrusion 311 on the substrate 1 covers the orthographic projection of the corresponding light-emitting device 20 on the substrate 1, that is, the size of the protrusion 311 is larger than the size of the corresponding light-emitting device.

[0056] In one embodiment, the orthographic projection of the filter unit 50 on the substrate 1 is offset from the orthographic projection of the light-emitting device 20 on the substrate 1, and surrounds the orthographic projection of the light-emitting device 20 on the substrate 1.

[0057] Combination Figure 1 and Figure 2 As shown, taking the first filter unit 51 and the first light-emitting device 21 as examples, the orthographic projection of the first filter unit 51 on the substrate 1 and the orthographic projection of the first light-emitting device 21 on the substrate 1 are staggered, that is, the orthographic projection of the first filter unit 51 on the substrate 1 and the orthographic projection of the first light-emitting device 21 on the substrate 1 do not overlap, and there is a certain gap between them.

[0058] The orthographic projection of the first filter unit 51 on the substrate 1 is ring-shaped, and the area enclosed in the middle of the ring is the orthographic projection of the opening 501 on the substrate 1. The orthographic projection of the first filter unit 51 on the substrate 1 completely surrounds the orthographic projection of the first light-emitting device 21 on the substrate 1, that is, the orthographic projection of the opening 501 on the substrate 1 completely covers the orthographic projection of the first light-emitting device 21 on the substrate 1. In this structure, some of the light emitted by the first light-emitting device 21 can be directly emitted through the opening 501, avoiding being blocked by the first filter unit 51, thereby improving the light transmittance of the color filter layer 5.

[0059] Furthermore, the display panel also includes a filling layer 6, which at least fills the opening 501, and the refractive index of the filling layer 6 is greater than the refractive index of the filter unit 50.

[0060] In one embodiment, please refer to Figure 1 The display panel also includes a filling layer 6, which is made of a transparent organic material. The filling layer 6 is disposed on the color filter layer 5 and fills the opening 501.

[0061] Combination Figure 1and Figure 3 As shown, taking the second filter unit 52 and the second light-emitting device 22 as examples, since the refractive index of the filling layer 6 is greater than that of the second filter unit 52, the light ray ② emitted by the second light-emitting device 22 undergoes total emission at the interface between the filling layer 6 and the second filter unit 52. The emission angle of the light ray ② decreases, thereby further increasing the amount of light emitted from small-angle light and improving the light emission efficiency of the light-emitting device. The effects at other filter units can be referred to the second filter unit 52, and will not be elaborated here.

[0062] For example, in one specific embodiment, the refractive index of the filling layer 6 is 1.55, the refractive index of the first filter unit 51 is 1.3, the refractive index of the second filter unit 52 is 1.4, and the refractive index of the third filter unit 53 is 1.5; in another specific embodiment, the refractive index of the filling layer 6 is 1.6, the refractive index of the first filter unit 51 is 1.4, the refractive index of the second filter unit 52 is 1.5, and the refractive index of the third filter unit 53 is 1.4; in yet another specific embodiment, the refractive index of the filling layer 6 is 1.7, the refractive index of the first filter unit 51 is 1.5, the refractive index of the second filter unit 52 is 1.3, and the refractive index of the third filter unit 53 is 1.3. In practical applications, the refractive index of the filling layer 6 is not limited to the above embodiments; it only needs to be greater than 1.5.

[0063] In some embodiments, the angle α between the sidewall of the protrusion 311 and the surface of the protrusion 311 near the light-emitting device 20 is an acute angle, and the width of the protrusion 311 gradually decreases from the end near the light-emitting device 20 to the end away from the light-emitting device 20. Figure 1 The cross-sectional shape shown is trapezoidal. With this structure, it can be ensured that the light emitted by the light-emitting device 20 is refracted at the interface between the sidewall of the protrusion 311 and the filter unit 50, thus reducing the emission angle.

[0064] In one specific embodiment, the angle α between the sidewall of the protrusion 311 and the surface of the protrusion 311 near the light-emitting device 20 is 30 degrees.

[0065] In some other embodiments, the included angle α between the sidewall of the protrusion 311 and the surface of the protrusion 311 near the light-emitting device 20 is not limited to 30 degrees in the above embodiments, but can also be 5 degrees, 15 degrees, 45 degrees, 60 degrees, 75 degrees or 80 degrees, etc. As long as it is greater than or equal to 5 degrees and less than or equal to 80 degrees, it can avoid the included angle α between the sidewall of the protrusion 311 and the surface of the protrusion 311 near the light-emitting device 20 being too large or too small, thus affecting the emission angle of the light.

[0066] In some embodiments, the angle β between the sidewall of the opening 501 and the bottom surface of the opening 501 is an obtuse angle, and the width of the opening 501 gradually increases from the end closer to the light-emitting device 20 to the end farther away from the light-emitting device. Figure 1 The cross-sectional shape shown is an inverted trapezoid.

[0067] In one specific embodiment, the angle β between the sidewall of the opening 501 and the bottom surface of the opening 501 is 120 degrees. In other embodiments, the angle β between the sidewall of the opening 501 and the bottom surface of the opening 501 is not limited to 120 degrees in the above embodiments, but can also be 100 degrees, 130 degrees, 145 degrees or 150 degrees, etc. As long as it is greater than or equal to 100 degrees and less than or equal to 150 degrees, it can be ensured that part of the light emitted by the light-emitting device 20 can undergo total internal reflection at the interface between the filter unit 50 and the filling layer 6.

[0068] In some embodiments, please refer to Figure 1 The inorganic insulating layer 31 also includes a dam 312, which is disposed around the protrusion 311 and between the filter units 50 of different colors. A gap exists between the dam 312 and the protrusion 311. Figure 1 The cross-sectional shape of the shown view is an inverted trapezoid. The filter unit 50 fills the gap between the dam 312 and the protrusion 311. The end of the filter unit 50 away from the light-emitting device 20 protrudes from the protrusion 311 and the end of the dam 312 away from the light-emitting device 20.

[0069] Please see Figure 1 A dam 312 is provided between the first filter unit 51 and the second filter unit 52, separating the first filter unit 51 and the second filter unit 52. A dam 312 is also provided between the second filter unit 52 and the third filter unit 53, separating the second filter unit 52 and the third filter unit 53.

[0070] In some embodiments, the orthographic projection of the dam 312 on the substrate 1 is offset from the orthographic projection of the light-emitting device 20 on the substrate 1, and the touch metal layer 32 is disposed on the dam 312.

[0071] Please see Figure 1 The fact that the orthographic projection of the dam 312 on the substrate 1 and the orthographic projection of the light-emitting device 20 on the substrate 1 are staggered means that the orthographic projection of the dam 312 on the substrate 1 and the orthographic projection of the light-emitting device 20 on the substrate 1 do not overlap, and the orthographic projection of the dam 312 on the substrate 1 is located between the staggered orthographic projections of adjacent light-emitting devices 20 on the substrate 1.

[0072] In some embodiments, the dam 312 includes a third portion 3121 and a fourth portion 3122, the fourth portion 3122 being disposed on the surface of the third portion 3121 facing away from the substrate 1, and the third portion 3121 and the fourth portion 3122 having the same material and refractive index. In other embodiments, the third portion 3121 and the fourth portion 3122 have different materials and refractive indices.

[0073] In one specific embodiment, the third part 3121 is made of the same material as the first inorganic insulating layer 3101 and is disposed in the same layer, that is, the third part 3121 and the first inorganic insulating layer 3101 can be formed by the same chemical vapor deposition process. Similarly, the fourth part 3122 is made of the same material as the second inorganic insulating layer 3102 and is disposed in the same layer, that is, the fourth part 3122 and the second inorganic insulating layer 3102 can be formed by the same chemical vapor deposition process. The materials and refractive indices of the first inorganic insulating layer 3101 and the second inorganic insulating layer 3102 can be referred to above and will not be repeated here.

[0074] In some embodiments, the touch layer 3 can be a self-capable touch structure or a mutual-capable touch structure. The touch metal layer 32 may include a first touch metal layer 321 and a second touch metal layer 322, with the second touch metal layer 322 disposed on the side of the first touch metal layer 321 facing away from the substrate 1.

[0075] In one specific embodiment, please refer to Figure 1 The first touch metal layer 321 is disposed on the surface of the third part 3121 away from the substrate 1, and the second touch metal layer 322 is disposed on the surface of the fourth part 3122 away from the substrate 1. Touch electrodes or touch signal lines can be disposed in both the first touch metal layer 321 and the second touch metal layer 322.

[0076] In some embodiments, the display panel further includes a light-shielding layer 7, which is disposed on the dam 312 and located on the side of the touch metal layer 32 away from the substrate 1. The orthogonal projection of the light-shielding layer 7 on the substrate 1 covers the orthogonal projection of the touch metal layer 32 on the substrate 1.

[0077] In one specific embodiment, such as Figure 1As shown, the light-shielding layer 7 can also be called a black matrix, meaning that the material of the light-shielding layer 7 is black photoresist or black ink. The light-shielding layer 7 is disposed on the surface of the fourth part 3122 facing away from the substrate 1 and covers the second touch metal layer 322. The light-shielding layer 7 is also located between adjacent filter units 50 of different colors. The light-shielding layer 7 can separate adjacent filter units 50 of different colors, thus preventing color mixing between adjacent light-emitting devices 20. The orthographic projection of the light-shielding layer 7 on the substrate 1 can cover the orthographic projections of the first touch metal layer 321 and the second touch metal layer 322 on the substrate 1. In this structure, since the reflectivity of the light-shielding layer 7 is low, using the light-shielding layer 7 to cover the touch metal layer 32 can reduce the reflection of the touch metal layer 32 to the external ambient light, thereby effectively concealing the visual effect of the touch metal layer 32.

[0078] Based on the display panel provided in the above embodiments, embodiments of this application also provide a method for manufacturing the display panel, combined with... Figure 4a and Figure 4b As shown, Figures 4a to 4b A schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this application. The method for manufacturing the display panel includes:

[0079] Step S1: A light-emitting device layer 2 and a touch layer 3 are sequentially formed on a substrate 1. The light-emitting device layer 2 has a plurality of light-emitting devices 20, and the touch layer 3 includes an inorganic insulating layer 31 and a touch metal layer 32 disposed on the inorganic insulating layer 31.

[0080] Step S2: The inorganic insulating layer 31 is patterned to form a plurality of spaced protrusions 311, the orthographic projection of the protrusions 311 on the substrate 1 overlaps with the orthographic projection of the light-emitting device 20 on the substrate 1.

[0081] Step S3: A color filter layer 5 is formed on the touch side layer 3. The color filter layer 5 includes a plurality of filter units 50. Each filter unit 50 surrounds a corresponding protrusion 311. The filter unit 50 has an opening 501 located above the protrusion 311.

[0082] Step S4: A filling layer 6 is formed on the color filter layer 5, the filling layer 6 at least filling the opening 501.

[0083] In the embodiments of this application, the refractive index of the inorganic insulating layer 31 is greater than the refractive index of the filter unit 50. The protrusion 311 can be formed by etching the inorganic insulating layer 31. Since the protrusion 311 is part of the inorganic insulating layer 31, the refractive index of the protrusion 311 is also greater than the refractive index of the filter unit 50.

[0084] Combination Figure 1 and Figure 3As shown, taking the first light-emitting device 21 as an example, since the refractive index of the protrusion 311 is greater than that of the filter unit 50, the light ① emitted by the first light-emitting device 21 is refracted at the interface between the protrusion 311 and the filter unit 50. The angle of refraction is greater than the angle of incidence, and the exit angle of the light ① is reduced. This increases the amount of light emitted from small-angle exiting light, thereby improving the luminous efficiency of the light-emitting device 20 and reducing the power consumption of the display panel. The effects of other light-emitting devices (such as the second light-emitting device 22 and the third light-emitting device 23) can be referred to the first light-emitting device 21, and no limitation is made here.

[0085] In the embodiments of this application, the refractive index of the filling layer 6 is greater than that of the filter unit 50. Taking the second filter unit 52 and the second light-emitting device 22 as examples, since the refractive index of the filling layer 6 is greater than that of the second filter unit 52, the light ray ② emitted by the second light-emitting device 22 undergoes total emission at the interface between the filling layer 6 and the second filter unit 52, and the emission angle of the light ray ② decreases, thereby further increasing the amount of light emitted from small-angle light and improving the light emission efficiency of the light-emitting device. The effects at other filter units can be referred to the second filter unit 52, and will not be described in detail here.

[0086] In one embodiment, the filling layer 6 only fills the opening 501. In other embodiments, the filling layer 6 not only fills the opening 501 but also covers the color filter layer 50.

[0087] In one embodiment, in step S2, while forming the protrusion 311, a plurality of spaced dams 312 are also formed. The dams 312 are disposed around the protrusion 311 and between filter units 50 of different colors. The filter units 50 fill the gap between the protrusion 311 and the dams 312.

[0088] In this embodiment, the materials, refractive index, and structure of the protrusion 311, the dam 312, and the inorganic insulating layer 31 can be referred to the previous embodiment of the display panel, and will not be repeated here.

[0089] In one embodiment, before forming the filling layer 6, the method of manufacturing the display panel further includes: forming a light-shielding layer 7 on the dam 312, the light-shielding layer 7 being located on the side of the touch metal layer 32 away from the substrate 1, and the orthogonal projection of the light-shielding layer 7 on the substrate 1 covering the orthogonal projection of the touch metal layer 32 on the substrate 1.

[0090] Specifically, the light-shielding layer 7 can also be called a black matrix, meaning that the material of the light-shielding layer 7 is black photoresist or black ink. The light-shielding layer 7 is disposed on the surface of the fourth part 3122 facing away from the substrate 1 and covers the second touch metal layer 322. The light-shielding layer 7 is also located between adjacent filter units 50 of different colors. The light-shielding layer 7 can separate adjacent filter units 50 of different colors, thus preventing color mixing between adjacent light-emitting devices 20. The orthographic projection of the light-shielding layer 7 on the substrate 1 can cover the orthographic projections of the first touch metal layer 321 and the second touch metal layer 322 on the substrate 1. In this structure, since the reflectivity of the light-shielding layer 7 is low, using the light-shielding layer 7 to cover the touch metal layer 32 can reduce the reflection of the touch metal layer 32 to the external ambient light, thereby effectively concealing the visual effect of the touch metal layer 32.

[0091] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display panel, which includes a substrate, a light-emitting device layer, a touch layer, a color filter layer, and a filler layer. The light-emitting device layer is disposed on the substrate and has multiple light-emitting devices. The touch layer is disposed on the light-emitting device layer and includes an inorganic insulating layer and a touch metal layer disposed on the inorganic insulating layer. The inorganic insulating layer includes multiple spaced protrusions, the orthographic projection of which onto the substrate overlaps with the orthographic projection of which onto the substrate. The color filter layer has multiple filter units, each filter unit surrounding a corresponding protrusion. The filter unit has an opening located above the protrusion, and the filling layer at least fills the opening. On the one hand, since the refractive index of the inorganic insulating layer is greater than that of the filter unit, some light can be refracted at the interface between the protrusion and the filter unit, thereby reducing the emission angle of this part of the light and increasing the amount of light emitted. On the other hand, since the refractive index of the filling layer is greater than that of the filter unit, some light can be totally internally reflected at the interface between the filter unit and the filling layer, thereby reducing the emission angle of this part of the light and further increasing the amount of light emitted, thereby improving the light emission efficiency of the light-emitting device and reducing the power consumption of the display panel.

[0092] In summary, although the present application discloses the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting device layer is disposed on the substrate, and the light-emitting device layer has a plurality of light-emitting devices; A touch layer is disposed on the light-emitting device layer. The touch layer includes an inorganic insulating layer and a touch metal layer disposed on the inorganic insulating layer. The inorganic insulating layer includes a plurality of spaced protrusions. The orthographic projection of the protrusions on the substrate overlaps with the orthographic projection of the light-emitting device on the substrate. A color filter layer has multiple filter units, each filter unit surrounds a corresponding protrusion, the filter unit has an opening located above the protrusion, and the refractive index of the inorganic insulating layer is greater than the refractive index of the filter unit; as well as A filling layer that at least fills the opening, wherein the refractive index of the filling layer is greater than the refractive index of the filter unit.

2. The display panel as described in claim 1, characterized in that, The orthographic projection of the filter unit on the substrate is offset from the orthographic projection of the light-emitting device on the substrate, and surrounds the orthographic projection of the light-emitting device on the substrate.

3. The display panel as described in claim 1, characterized in that, The angle between the sidewall of the protrusion and the surface of the protrusion near the light-emitting device is an acute angle, and the width of the protrusion gradually decreases from the end near the light-emitting device to the end away from the light-emitting device.

4. The display panel as described in claim 3, characterized in that, The angle between the sidewall of the protrusion and the surface of the protrusion near the light-emitting device is greater than or equal to 5 degrees and less than or equal to 80 degrees.

5. The display panel as described in claim 1, characterized in that, The angle between the sidewall of the opening and the bottom surface of the opening is an obtuse angle, and the width of the opening gradually increases from the end closer to the light-emitting device to the end farther away from the light-emitting device.

6. The display panel as described in claim 1, characterized in that, The protrusion includes a first part and a second part, the second part being disposed on the surface of the first part away from the substrate. The inorganic insulating layer includes a first inorganic insulating layer and a second inorganic insulating layer, the second inorganic insulating layer being disposed on the surface of the first inorganic insulating layer away from the substrate. The first part is made of the same material as the first inorganic insulating layer and is disposed in the same layer. The second part is made of the same material as the second inorganic insulating layer and is disposed in the same layer. Wherein, the refractive index of the first inorganic insulating layer is greater than or equal to the refractive index of the second inorganic insulating layer.

7. The display panel as described in claim 6, characterized in that, The first inorganic insulating layer and the second inorganic insulating layer have the same refractive index, and the refractive index of the first inorganic insulating layer and the second inorganic insulating layer is greater than or equal to 1.6 and less than or equal to 1.

8.

8. The display panel as described in claim 6, characterized in that, The refractive index of the first inorganic insulating layer is greater than or equal to 1.6 and less than or equal to 1.8, and the refractive index of the second inorganic insulating layer is greater than or equal to 1.3 and less than or equal to 1.

5.

9. The display panel as claimed in claim 1, characterized in that, The inorganic insulating layer also includes a dam, which is disposed around the protrusion and between the filter units of different colors, and the filter units fill the gap between the protrusion and the dam; The orthographic projection of the dam on the substrate is offset from the orthographic projection of the light-emitting device on the substrate, and the touch metal layer is disposed on the dam.

10. The display panel as claimed in claim 9, characterized in that, The display panel further includes a light-shielding layer disposed on the dam and located on the side of the touch metal layer opposite to the substrate; Wherein, the orthogonal projection of the light-shielding layer on the substrate covers the orthogonal projection of the touch metal layer on the substrate.

Images