Display panel, manufacturing method of display panel and display device

Abstract

The invention provides a display panel, a manufacturing method of the display panel and a display device, and relates to the technical field of display. The display panel comprises a glass substrate, a driving function layer, a light-emitting function layer, a protection layer, a light extraction layer, a color film layer and a glass cover plate, the driving function layer is located on one side of the glass substrate, the light-emitting function layer is located on the side, away from the glass substrate, of the driving function layer, and the light-emitting function layer comprises a plurality of light-emitting units; the protection layer is located on the side, away from the driving function layer, of the light-emitting function layer, and a plurality of via holes are formed in the protection layer; the light extraction layer is located on the side, away from the light-emitting functional layer, of the protective layer, comprises a plurality of light extraction units and is made of an organic material; the color film layer is located on the side, away from the protection layer, of the light extraction layer and comprises a plurality of color film units. The glass cover plate is located on the side, away from the light extraction layer, of the color film layer and is in packaging connection with the glass substrate through a glass cement packaging supporting structure. According to the display panel provided by the invention, the luminous efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display panel, a method for manufacturing the display panel, and a display device. Background Technology

[0002] WOLED (White Organic Light-Emitting Diode) display panels have been widely used in AR, VR, night vision devices, industrial, and medical fields due to their advantages such as high brightness, long lifespan, and high PPI.

[0003] WOLED display panels generate white OLED backlight, which is then used to form individual red, green, and blue sub-pixels through an RGB color filter array. However, the high temperatures of the color filter material under rigid encapsulation conditions cause it to release carbon dioxide and oxygen, affecting the light extraction efficiency and lifespan of the WOLED display panel.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a display panel, a method for manufacturing the display panel, and a display device that improve the luminous efficiency and lifespan of the display panel.

[0006] According to one aspect of this disclosure, a display panel is provided, the display panel comprising:

[0007] Glass substrate;

[0008] A driving functional layer is located on one side of the glass substrate;

[0009] A light-emitting functional layer is located on the side of the driving functional layer opposite to the glass substrate, and the light-emitting functional layer includes a plurality of light-emitting units;

[0010] A protective layer is located on the side of the light-emitting functional layer opposite to the driving functional layer, and the protective layer is provided with multiple vias;

[0011] A light extraction layer is located on the side of the protective layer opposite to the light-emitting functional layer. The light extraction layer includes multiple light extraction units and is made of an organic material.

[0012] A color filter layer is located on the side of the light extraction layer opposite to the protective layer. The color filter layer includes multiple color filter units, which are arranged in a one-to-one correspondence with the multiple light emission units and the multiple light extraction units.

[0013] A glass cover plate is located on the side of the color filter layer opposite to the light extraction layer, and is encapsulated and connected to the glass substrate by a glass glue encapsulation support structure. The glass glue encapsulation support structure surrounds the color filter layer, the light extraction layer, the protective layer, the light-emitting functional layer, and the driving functional layer.

[0014] In one exemplary embodiment of this disclosure, the light extraction layer includes a plurality of plano-convex lens units, the convex surfaces of the plano-convex lens units facing the color filter layer, and the plano-convex lens units serving as the light extraction units.

[0015] In one exemplary embodiment of this disclosure, the light extraction layer is a Bragg lens layer, and the Bragg lens layer includes the plurality of plano-convex lens units.

[0016] In one exemplary embodiment of this disclosure, the material of the Bragg lens layer includes at least one selected from acrylic resin, polyimide resin, siloxane resin, and phenolic resin.

[0017] In one exemplary embodiment of this disclosure, the thickness of the plano-convex lens unit is 500 Å to 1000 Å, and the refractive index is 1.6 to 1.8.

[0018] In one exemplary embodiment of this disclosure, the color filter layer further includes a black matrix, the black matrix having a plurality of openings, and the plurality of color filter units being disposed one-to-one in the plurality of openings; the positions of adjacent portions between the plurality of light extraction units correspond to the positions of the black matrix.

[0019] In an exemplary embodiment of this disclosure, the diameter of the via is 1 μm to 3 μm, and the spacing between two adjacent vias is 1 μm to 3 μm; the sidewall of the via is an inclined surface, and the angle between the inclined surface and the bottom surface of the via facing the light-emitting functional layer is 15° to 30°.

[0020] In an exemplary embodiment of this disclosure, along the direction of the driving functional layer away from the glass substrate, the light-emitting functional layer sequentially includes a first light-emitting material layer, a second light-emitting material layer, and a third light-emitting material layer; one of the first light-emitting material layer, the second light-emitting material layer, and the third light-emitting material layer is a red light-emitting layer, one is a green light-emitting layer, and the other is a blue light-emitting layer.

[0021] According to another aspect of this disclosure, a method for manufacturing a display panel is provided, the method comprising:

[0022] A glass substrate is provided, and a driving functional layer is formed on one side of the glass substrate; a light-emitting functional layer is formed on the side of the driving functional layer opposite to the glass substrate, the light-emitting functional layer including a plurality of light-emitting units;

[0023] A glass cover is provided, and a color filter layer is formed on one side of the glass cover. The color filter layer includes a plurality of color filter units. A light extraction layer is formed on the side of the color filter layer opposite to the glass cover. The light extraction layer includes a plurality of light extraction units and is made of an organic material. The plurality of color filter units are arranged in a one-to-one correspondence with the plurality of light-emitting units and the plurality of light extraction units. A protective layer is formed on the side of the light extraction layer opposite to the color filter layer. The protective layer has a plurality of vias.

[0024] A glass adhesive is applied to the glass cover plate, and the glass adhesive surrounds the color filter layer, the light extraction layer, and the protective layer; the glass adhesive is subjected to high-temperature treatment to remove the glass adhesive solvent; the glass substrate and the glass cover plate are assembled, and the glass adhesive after removing the glass adhesive solvent is laser sintered to form a glass adhesive encapsulation support structure between the glass substrate and the glass cover plate.

[0025] According to another aspect of this disclosure, a display device is provided, which includes the display panel described above.

[0026] The display panel disclosed herein features a light extraction layer between the light-emitting functional layer and the color filter layer, which improves light extraction efficiency. The protective layer enhances the structural reliability of the light extraction layer. Furthermore, the light extraction layer is made of organic material with a relatively porous film. The protective layer has multiple vias. Before the light-emitting device, formed by the glass substrate, driving functional layer, and light-emitting functional layer, is assembled, the high temperature applied to the glass cover to remove the glass adhesive solvent causes the color filter layer to release gases. Water, oxygen, carbon dioxide, and other molecules in the color filter layer are completely released along the vias in the inorganic film layer and the protective layer. This prevents the color filter material from releasing carbon dioxide and oxygen under high temperatures in rigid encapsulation scenarios, thus avoiding any impact on the luminous efficiency and lifespan of the display panel.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0029] Figure 1 This is a schematic diagram of a display panel provided in one embodiment of the present disclosure.

[0030] Figure 2 This is a schematic diagram of light extraction provided for one embodiment of the present disclosure.

[0031] Figures 3-6 This is a process flow diagram for manufacturing a color filter layer, a light extraction layer, and a protective layer, provided as an embodiment of the present disclosure.

[0032] Figure 7 A flowchart of a display panel provided for one embodiment of this disclosure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Glass substrate;

[0035] 20. Driving functional layer; 210. Transistor; 220. Reflective anode; 230. Transparent conductive layer;

[0036] 30. Light-emitting functional layer; 311. First light-emitting material layer; 312. Second light-emitting material layer; 331. Third light-emitting material layer; 321. Hole injection layer; 322. First hole transport layer; 323. First electron transport layer; 324. Charge generation layer; 325. Second hole transport layer; 326. Second electron transport layer; 327. Electron injection layer; 330. Common cathode layer;

[0037] 40. Glass cover plate;

[0038] 50. Color filter layer; 510. Black matrix; 520. Color filter unit; 521. Red color filter; 522. Green color filter; 523. Blue color filter;

[0039] 60. Light extraction layer; 610. Plano-convex lens unit;

[0040] 70. Protective layer; 71. Via;

[0041] 80. Nitrogen layer. Detailed Implementation

[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0043] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0044] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0045] The embodiments of this disclosure preferably provide a display panel, such as Figure 1 As shown, the display panel includes a glass substrate 10, a driving functional layer 20, a light-emitting functional layer 30, a protective layer 70, a light extraction layer 60, a color filter layer 50, and a glass cover plate 40. The driving functional layer 20 is located on one side of the glass substrate 10, and the light-emitting functional layer 30 is located on the side of the driving functional layer 20 away from the glass substrate 10. The light-emitting functional layer 30 includes multiple light-emitting units. The protective layer 70 is located on the side of the light-emitting functional layer 30 away from the driving functional layer 20, and the protective layer 70 is provided with multiple vias 71. The light extraction layer 60 is located on the side of the protective layer 70 away from the light-emitting functional layer 30, and the light extraction layer 60 is made of organic material. The color filter layer 50 is located on the side of the light extraction layer 60 away from the protective layer 70, and the color filter layer 50 includes multiple color filter units 520, and the multiple color filter units 520 are arranged one-to-one with the multiple light-emitting units. The glass cover plate 40 is located on the side of the color filter layer 50 away from the light extraction layer 60. The glass cover plate 40 is connected to the glass substrate 10 by a glass glue encapsulation support structure after being encapsulated. The glass glue encapsulation support structure surrounds the color filter layer 50, the light extraction layer 60, the protective layer 70, the light emission functional layer 30, and the driving functional layer 20.

[0046] The display panel disclosed herein features a light extraction layer 60 disposed between the light-emitting functional layer 30 and the color filter layer 50, which improves light extraction efficiency. The protective layer 70 enhances the structural reliability of the light extraction layer 60. Furthermore, the light extraction layer 60 is made of organic material with a relatively porous film. The protective layer 70 has multiple vias 71. Before the light-emitting device formed by the glass substrate 10, driving functional layer 20, and light-emitting functional layer 30 is assembled, the high temperature of 260°C to 380°C during the high-temperature treatment of the glass cover to remove the glass adhesive solvent causes the color filter layer 50 to release gas. Water, oxygen, carbon dioxide, and other molecules in the color filter layer 50 are completely released along the light extraction layer 60 of the inorganic film layer and the vias 71 on the protective layer 70. This prevents the color filter material from releasing carbon dioxide and oxygen under high temperatures in a rigid encapsulation environment, thereby avoiding impact on the luminous efficiency and lifespan of the display panel.

[0047] In some examples, the light extraction layer 60 includes multiple light extraction units, which are configured one-to-one with multiple color filter units 520 and multiple light-emitting units. By having each light extraction unit correspond to one light-emitting unit and one color filter unit 520, an independent light emission-light extraction-light filtering channel is formed. The light generated by the light-emitting unit can be concentrated into the corresponding light extraction unit, avoiding lateral diffusion of light in the light extraction layer 60, and enabling the light extraction unit to extract light more efficiently. After passing through the corresponding light extraction unit, the light emitted by the light-emitting unit directly enters the matched color filter unit 520 for filtering, avoiding color crosstalk caused by light diffusing in the light extraction layer 60 and entering adjacent color filter units 520.

[0048] Among them, such as Figure 1 As shown, the light extraction layer 60 includes multiple plano-convex lens units 610, with the convex surface of each plano-convex lens unit 610 facing the color filter layer 50. The plano-convex lens unit 610 serves as a light extraction unit. Figure 2 As shown, according to the principles of geometric optics, diverging light rays incident from the planar side converge towards the focal point of the convex surface after passing through the plano-convex lens, reducing the light diffusion angle. This focusing effect allows more light to be concentrated into the corresponding color filter unit 520, reducing light loss during transmission. Simultaneously, the convex surface facing the color filter layer 50 ensures that the converged light rays are incident almost perpendicularly onto the color filter unit 520, reducing reflection loss caused by an excessively large incident angle and further improving light extraction efficiency. Furthermore, the focusing characteristics of the plano-convex lens limit the lateral propagation range of the light, strictly confining the light from each light-emitting unit within the optical path of the corresponding plano-convex lens unit 610, preventing diffusion to adjacent pixels.

[0049] In some examples, the light extraction layer 60 is a Bragg lens layer, which includes multiple plano-convex lens units 610. The Bragg lens layer achieves optical functions through a nanoscale periodic structure, with a relatively small thickness—more than 50% thinner than traditional microlens arrays—contributing to the thinning and lightening of display panels. This is particularly important when applied to AR / VR display devices, reducing device weight and improving user comfort.

[0050] The Bragg lens layer can be made of at least one of acrylic resin, polyimide resin, siloxane resin, and phenolic resin.

[0051] In forming the Bragg lens layer, the lens pattern can be defined through steps such as photoresist coating, exposure, and development, and then the lens shape can be formed on a specific material layer through etching. In other embodiments, the Bragg lens layer includes multiple crystal units, which form multiple plano-convex lens units 610. That is, multiple crystal units are formed by crystallizing the Bragg lens material, and these multiple crystal units serve as multiple plano-convex lens units 610. The crystal units have a high and stable refractive index, which allows the plano-convex lens units 610 to better control the light propagation path, increase the light refraction angle, improve the light focusing effect, and reduce light propagation loss inside the lens. At the same time, the refractive index of the crystal material is less affected by environmental factors such as temperature and humidity, ensuring the stability of the optical performance of the plano-convex lens units 610 under different environmental conditions. Furthermore, the crystal unit has a regular atomic arrangement structure, and its optical properties have high spatial uniformity, which makes the refractive index distribution of the plano-convex lens unit 610 uniform and will not cause light scattering or refraction deviation due to material inhomogeneity. Compared with lenses made of amorphous materials, the optical uniformity of the crystal unit plano-convex lens is greatly improved, which can reduce the scattering loss of light during propagation and further improve the light extraction efficiency of the display panel.

[0052] The thickness of the plano-convex lens unit 610 can be 500 Å to 1000 Å, meaning the thickness of the Bragg lens layer can be 500 Å to 1000 Å, such as 500 Å, 550 Å, 600 Å, 650 Å, 700 Å, 750 Å, 800 Å, 850 Å, 900 Å, 950 Å, and 1000 Å, etc., which will not be listed here. Within the thickness range of 500 Å to 1000 Å, light absorption loss inside the lens can be reduced; an excessively thick lens increases the light propagation path in the material, leading to more light absorption, while an excessively thin lens makes it difficult to form an effective convex structure, affecting the light-gathering effect. In addition, a smaller Bragg lens layer thickness contributes to the thinner and lighter display panel.

[0053] The refractive index of the plano-convex lens unit 610 is 1.6 to 1.8, such as 1.6, 1.65, 1.7, 1.75, 1.8, etc., which will not be listed here. When the refractive index is between 1.6 and 1.8, it can form a reasonable match with the refractive index of the adjacent medium, reduce the interface reflection loss, and ensure that the diverging light rays incident on the plane side of the plano-convex lens will converge towards the focal point of the convex surface after passing through the plano-convex lens, reducing the light diffusion angle. More light can be emitted from the light-emitting functional layer 30 through the light extraction layer 60 and the color filter layer 50, directly improving the brightness and energy efficiency ratio of the display panel.

[0054] Figures 3-6 This is a process flow diagram illustrating the manufacturing process of the color filter layer 50, the light extraction layer 60, and the protective layer 70, according to one embodiment of this disclosure. Figure 3 As shown, a glass cover plate 40 is provided; as Figure 4 As shown, a black matrix 510 is then formed on the glass cover plate 40, and the black matrix 510 has multiple openings; then, color filter units 520 are fabricated in the multiple openings respectively. The black matrix 510 is made of opaque material and is located between adjacent color filter units 520, which can effectively block light crosstalk between adjacent color filter units 520; the multiple color filter units 520 include a red color filter 521, a green color filter 522, and a blue color filter 523; as Figure 5 As shown, a Bragg lens layer is then fabricated to form multiple plano-convex lens units 610; as Figure 6 As shown, a protective layer 70 is then deposited on the Bragg lens layer, and multiple vias 71 are formed on the protective layer 70 to release carbon dioxide and oxygen from the color filter through the vias 71.

[0055] The positions of adjacent parts between multiple light extraction units correspond to the positions of the black matrix 510, that is, the edges of multiple plano-convex lens units 610 correspond to the positions of the black matrix 510. This enables the light emitted from the plano-convex lens unit 610 to enter the corresponding color filter, avoiding diffusion to adjacent color filters and improving the light leakage phenomenon.

[0056] The protective layer 70 can be made of SiN. X Or silicon dioxide, or SiN X Composite film of SiN and SiO2. X Alternatively, the protective layer 70 formed by silicon oxide is an inorganic film layer with a denser film, so it is necessary to open through holes 71 to form an exhaust channel.

[0057] The thickness of the protective layer 70 can be 600A to 2000A, such as 600A, 800A, 1000A, 1200A, 1500A, 1800A, 2000A, etc., which will not be listed here in this disclosure.

[0058] Among them, the transmittance of the protective layer 70 is ≥85%, such as 85%, 88%, 90%, 95%, etc., and the higher transmittance can improve the light output efficiency.

[0059] The via 71 can be cylindrical, prismatic, rectangular, frustum-shaped, etc. When the via 71 is cylindrical, its diameter can be 1μm to 3μm, for example, 1μm, 2μm, 3μm, etc. When the via 71 is rectangular, its width can be 1μm to 3μm, for example, 1μm, 2μm, 3μm, etc.; its length can also be 1μm to 3μm, for example, 1μm, 2μm, 3μm, etc.

[0060] The spacing between two adjacent openings can be 1μm to 3μm, for example, 1μm, 2μm, 3μm, etc.; the spacing between vias 71 refers to the distance between the edges of two vias 71.

[0061] The sidewall of the via 71 is an inclined surface, and the angle between the inclined surface and the bottom surface of the via 71 facing the light-emitting functional layer 30 is 15° to 30°, such as 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, etc. The via 71 can be in the shape of a frustum, that is, the inclination angle of the side of the frustum is 5° to 30°.

[0062] In some embodiments, the display panel includes a glass substrate 10, a driving functional layer 20, a light-emitting functional layer 30, and an encapsulation layer. The glass substrate 10 may be a silicon glass substrate.

[0063] The driving functional layer 20 is disposed on the glass substrate 10. The driving functional layer 20 includes multiple pixel driving circuits and multiple signal traces for providing electrical signals to the pixel driving circuits. Each pixel driving circuit includes at least a transistor (TFT) 210 and a conductive structure for connecting the TFT. For example, the driving functional layer 20 includes an active layer disposed on the glass substrate 10, a gate insulating layer covering the glass substrate 10 and the active layer, a gate layer disposed on the gate insulating layer, an interlayer dielectric layer covering the gate layer and the gate insulating layer, and a source / drain electrode layer disposed on the interlayer dielectric layer. This source / drain electrode layer is connected to the active layer through a first via 71 penetrating the interlayer dielectric layer and the gate insulating layer. Furthermore, the driving functional layer 20 also includes a planarization layer covering the source / drain electrode layer and the interlayer dielectric layer. When the glass substrate 10 is a silicon glass substrate, the active layer of the TFT is directly formed on the silicon glass substrate. The TFT is connected to a reflective anode 220, which is connected to the light-emitting functional layer 30 through an inductively coupled plasma (ITO) layer 230.

[0064] The light-emitting layer 30 is configured to emit white light, meaning the display panel is a WOLED display panel, and the white light emits the corresponding color after passing through the color filter layer 50. For example... Figure 1 As shown, along the direction of the driving functional layer 20 away from the glass substrate 10, the light-emitting functional layer 30 sequentially includes a first light-emitting material layer 311, a second light-emitting material layer 312, and a third light-emitting material layer 131; one of the first light-emitting material layer 311, the second light-emitting material layer 312, and the third light-emitting material layer 131 is a red light-emitting layer, one is a green light-emitting layer, and the other is a blue light-emitting layer. For example, the first light-emitting material layer 311 is a blue light-emitting layer, the second light-emitting material layer 312 is a red light-emitting layer, and the third light-emitting material layer 131 is a green light-emitting layer. The first light-emitting material layer 311, the second light-emitting material layer 312, and the third light-emitting material layer 131 can be deposited as a single layer to improve pixel density.

[0065] Among them, such as Figure 1 As shown, the light-emitting functional layer 30 further includes a hole injection layer 321, a first hole transport layer 322, a first electron transport layer 323, a charge generation layer 324, a second hole transport layer 325, a second electron transport layer 326, an electron injection layer 327, and a common cathode layer 330. The hole injection layer 321 is located between the first light-emitting material layer 311 and the driving functional layer 20. The first hole transport layer 322 is located between the hole injection layer 321 and the first light-emitting material layer 311. The first electron transport layer 323 is located between the second light-emitting layer 324 and the first electron transport layer 325. Between material layer 312 and the first light-emitting material layer 311, charge generation layer 324 is located between the second light-emitting material layer 312 and the first electron transport layer 323, second hole transport layer 325 is located between the second light-emitting material layer 312 and the charge generation layer 324, second electron transport layer 326 is located between the protective layer 70 and the third light-emitting material layer 131, electron injection layer 327 is located between the protective layer 70 and the second electron transport layer 326, and common cathode layer 330 is located between the protective layer 70 and the electron injection layer 327.

[0066] The encapsulation layer is located on the light-emitting functional layer 30. The encapsulation layer may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer. For example, a first encapsulation layer can be formed on the side of the light-emitting functional layer 30 away from the glass substrate 10 using physical vapor deposition or chemical vapor deposition. Then, a second encapsulation layer is formed on the side of the first encapsulation layer away from the light-emitting functional layer 30 using inkjet printing. Finally, a third encapsulation layer is formed on the side of the second encapsulation layer away from the first encapsulation layer using physical vapor deposition or chemical vapor deposition. The second encapsulation layer can be an organic encapsulation layer, while the first and third encapsulation layers can be inorganic encapsulation layers. By setting multiple inorganic encapsulation layers, the ability of the encapsulation layer to block water and oxygen can be improved, and by setting organic encapsulation layers, planarization can be achieved. For example, the inner and outer inorganic encapsulation layers can be made of inorganic materials such as silicon nitride (SiN). The organic encapsulation layer can be made of curable (e.g., photocurable or thermocurable) organic materials. For example, the organic encapsulation layer can be made of at least one of epoxy resin-based organic materials, acrylate-based organic materials, and silicone-based materials. Furthermore, the encapsulation structure may include not only the aforementioned inner inorganic encapsulation layer, outer inorganic encapsulation layer, and organic encapsulation layer, but may also include other inorganic and organic encapsulation layers, which can be alternately stacked; this disclosure does not impose any limitations in this regard.

[0067] like Figure 1 As shown, after forming the encapsulated light-emitting device, the light extraction layer 60 and the protective color filter device are aligned at high temperatures to release carbon dioxide and oxygen, forming a rigidly encapsulated WOLED. During the alignment process, nitrogen gas is filled between the protective layer 70 and the encapsulation layer to form a nitrogen layer 80. This avoids the color filter material releasing carbon dioxide and oxygen at high temperatures under rigid encapsulation conditions, thus preventing any impact on the luminous efficiency and lifespan of the WOLED product. It is understandable that when forming the nitrogen layer 80 between the protective layer 70 and the encapsulation layer, a spacer can be placed between the protective layer 70 and the encapsulation layer to create a stable space filled with nitrogen gas.

[0068] Embodiments of this disclosure also provide a method for manufacturing a display panel, such as... Figure 7 As shown, the manufacturing method includes:

[0069] Step S100: Provide a glass substrate, form a driving functional layer on one side of the glass substrate; form a light-emitting functional layer on the side of the driving functional layer opposite to the glass substrate, the light-emitting functional layer including multiple light-emitting units;

[0070] Step S200: Provide a glass cover plate, form a color filter layer on one side of the glass cover plate, the color filter layer includes multiple color filter units; form a light extraction layer on the side of the color filter layer away from the glass cover plate, the light extraction layer includes multiple light extraction units, the light extraction layer is made of organic material; the multiple color filter units are arranged in a one-to-one correspondence with multiple light emission units and multiple light extraction units; form a protective layer on the side of the light extraction layer away from the color filter layer, the protective layer is provided with multiple vias;

[0071] Step S300: Apply glass adhesive to the glass cover plate, with the glass adhesive surrounding the color filter layer, light extraction layer, and protective layer; perform high-temperature treatment on the glass adhesive (frit adhesive) to remove the glass adhesive solvent; align the glass substrate and the glass cover plate, and perform laser sealing on the glass adhesive after removing the glass adhesive solvent to form a glass adhesive encapsulation support structure between the glass substrate and the glass cover plate.

[0072] The display panel disclosed herein features a light extraction layer between the light-emitting functional layer and the color filter layer, which improves light extraction efficiency. The protective layer enhances the structural reliability of the light extraction layer. Furthermore, the light extraction layer is made of organic material with a relatively porous film. The protective layer has multiple vias. Before the light-emitting device, formed by the glass substrate, driving functional layer, and light-emitting functional layer, is assembled, the high-temperature treatment (260°C–380°C) applied to the glass cover to remove the glass adhesive solvent causes the color filter layer to release gases. Water, oxygen, carbon dioxide, and other molecules in the color filter layer are completely released along the vias in the inorganic film layer and the protective layer. This prevents the color filter material from releasing carbon dioxide and oxygen under high temperatures in rigid encapsulation scenarios, thus avoiding any impact on the luminous efficiency and lifespan of the display panel.

[0073] It should be noted that the manufacturing method of the display panel provided in this disclosure can be used to manufacture the display panel provided in the above embodiments. For details of the display panel, please refer to the detailed discussion in the above display panel embodiments. It will not be repeated in the method embodiments.

[0074] Embodiments of this disclosure also provide a display device, which includes the display panel described above. This display device may be, for example, an AR / VR device, a night vision device, an industrial display device, a medical display device, a mobile phone, a watch, a tablet computer, an advertising screen, a vehicle-mounted display, or other terminal devices with display functions. The beneficial effects of this device are detailed in the above-described display panel embodiments and will not be repeated here.

[0075] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A display panel, characterized in that, include: Glass substrate; A driving functional layer is located on one side of the glass substrate; A light-emitting functional layer is located on the side of the driving functional layer opposite to the glass substrate, and the light-emitting functional layer includes a plurality of light-emitting units; A protective layer is located on the side of the light-emitting functional layer opposite to the driving functional layer, and the protective layer is provided with multiple vias; A light extraction layer is located on the side of the protective layer opposite to the light-emitting functional layer. The light extraction layer includes multiple light extraction units and is made of an organic material. A color filter layer is located on the side of the light extraction layer opposite to the protective layer. The color filter layer includes multiple color filter units, which are arranged in a one-to-one correspondence with the multiple light emission units and the multiple light extraction units. A glass cover plate is located on the side of the color filter layer opposite to the light extraction layer, and is encapsulated and connected to the glass substrate by a glass glue encapsulation support structure. The glass glue encapsulation support structure surrounds the color filter layer, the light extraction layer, the protective layer, the light-emitting functional layer, and the driving functional layer.

2. The display panel according to claim 1, characterized in that, The light extraction layer includes multiple plano-convex lens units, with the convex surface of each plano-convex lens unit facing the color filter layer, and the plano-convex lens unit serving as the light extraction unit.

3. The display panel according to claim 2, characterized in that, The light extraction layer is a Bragg lens layer, which includes the plurality of plano-convex lens units.

4. The display panel according to claim 3, characterized in that, The material of the Bragg lens layer includes at least one of acrylic resin, polyimide resin, silicone resin, and phenolic resin.

5. The display panel according to claim 4, characterized in that, The thickness of the plano-convex lens unit is 500 Å to 1000 Å, and the refractive index is 1.6 to 1.

8.

6. The display panel according to claim 2, characterized in that, The color filter layer also includes a black matrix, which has multiple openings, and the multiple color filter units are disposed in the multiple openings in a one-to-one correspondence; the positions of adjacent portions between the multiple light extraction units correspond to the positions of the black matrix.

7. The display panel according to claim 1, characterized in that, The diameter of the via is 1μm to 3μm, and the spacing between two adjacent vias is 1μm to 3μm; the sidewall of the via is a slope, and the angle between the slope and the bottom surface of the via facing the light-emitting functional layer is 15° to 30°.

8. The display panel according to claim 1, characterized in that, Along the direction away from the glass substrate from the driving functional layer, the light-emitting functional layer sequentially includes a first light-emitting material layer, a second light-emitting material layer, and a third light-emitting material layer; one of the first light-emitting material layer, the second light-emitting material layer, and the third light-emitting material layer is a red light-emitting layer, one is a green light-emitting layer, and the other is a blue light-emitting layer.

9. A method for manufacturing a display panel, characterized in that, include: A glass substrate is provided, and a driving function layer is formed on one side of the glass substrate; A light-emitting functional layer is formed on the side of the driving functional layer opposite to the glass substrate, and the light-emitting functional layer includes a plurality of light-emitting units; A glass cover is provided, and a color filter layer is formed on one side of the glass cover. The color filter layer includes a plurality of color filter units. A light extraction layer is formed on the side of the color filter layer opposite to the glass cover. The light extraction layer includes a plurality of light extraction units and is made of an organic material. The plurality of color filter units are arranged in a one-to-one correspondence with the plurality of light-emitting units and the plurality of light extraction units. A protective layer is formed on the side of the light extraction layer opposite to the color filter layer. The protective layer has a plurality of vias. A glass adhesive is applied to the glass cover plate, the glass adhesive surrounding the color filter layer, the light extraction layer, and the protective layer; the glass adhesive is then subjected to high-temperature treatment to remove the solvent. The glass substrate and the glass cover are aligned, and the glass adhesive after solvent removal is laser-sintered to form a glass adhesive encapsulation support structure between the glass substrate and the glass cover.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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