Display panel, display module and display device

Abstract

The invention provides a display panel, a display module and a display device. The display panel includes: a first substrate; the first insulating layer is positioned on one side of the first substrate; the first metal layer comprises a first metal part, and the first metal part is located on the side, away from the first substrate, of the first insulating layer; the first active layer is located on the side, away from the first substrate, of the first metal part; the first insulating layer comprises a hollow part, and the hollow part and the first active layer are at least partially overlapped in the thickness direction of the display panel. The display panel at least solves the problem of poor stability of the active layer of the display panel in the prior art.

Description

Technical Field

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

[0002] With the continuous development of display technology, display panels are widely used in electronic devices such as mobile phones, tablet computers and car displays, bringing convenience to people's lives. At present, the stability of the active layer in the display area is poor, and the threshold voltage Vth is prone to drift under high light. Summary of the invention

[0003] The main purpose of the present application is to provide a display panel, a display module and a display device, so as to at least solve the problem of poor stability of the active layer of the display panel in the prior art.

[0004] In order to achieve the above objective, according to one aspect of the present application, a display panel is provided, comprising:

[0005] a first substrate;

[0006] a first insulating layer, wherein the first insulating layer is located on one side of the first substrate;

[0007] a first metal layer, the first metal layer comprising a first metal portion, the first metal portion being located on a side of the first insulating layer away from the first substrate;

[0008] a first active layer, wherein the first active layer is located on a side of the first metal portion away from the first substrate;

[0009] The first insulating layer includes a hollow portion, and along a thickness direction of the display panel, the hollow portion at least partially overlaps with the first active layer.

[0010] According to another aspect of the present application, a display module is provided, comprising: any one of the display panels described above.

[0011] According to another aspect of the present application, a display device is provided, comprising the above-mentioned display module.

[0012] By applying the technical solution of the present application, a hollow portion is provided in at least a portion of the first insulating layer corresponding to the first active layer along the thickness direction of the display panel, that is, at least a portion of the first insulating layer in the region corresponding to the first active layer is removed, thereby reducing or even eliminating the amount of light entering the first active layer due to reflection from the first insulating layer, alleviating the problem of threshold voltage drift of the first active layer caused by light reaching the first active layer through reflection, and ensuring better display stability of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 A schematic diagram showing the light path of a conventional backlight after the light enters the display panel;

[0015] Figure 2 A schematic cross-sectional structure diagram of a display panel provided in an embodiment of the present application is shown;

[0016] Figure 3 A schematic cross-sectional structure diagram of another display panel provided according to an embodiment of the present application is shown;

[0017] Figure 4 A schematic cross-sectional structure diagram of another display panel provided according to an embodiment of the present application is shown;

[0018] Figure 5 A schematic cross-sectional structure diagram of another display panel provided according to an embodiment of the present application is shown;

[0019] Figure 6 Shows the existing solutions and the present application Figure 5 Comparison chart of reflectivity results of the example solutions;

[0020] Figure 7 A schematic cross-sectional structure diagram of a display module provided according to an embodiment of the present application is shown;

[0021] Figure 8 A schematic structural diagram of a display device provided according to an embodiment of the present application is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10a, display panel; 11a, first substrate; 13a, first metal portion; 14a, first active layer; 31a, buffer layer; 32a, first gate insulating layer; 33a, first dielectric layer; 34a, second gate insulating layer; 35a, third gate insulating layer; 36a, second dielectric layer; 37a, third dielectric layer;

[0024] 10. Display panel; 101. Display area; 102. Non-display area; 11. First substrate; 12. First insulating layer; 13. First metal part; 14. First active layer; 15. Hollow part; 16. First gate; 17. First source; 18. First drain; 19. Second insulating layer; 20. First insulating sublayer; 21. Second insulating sublayer; 22. First part; 23. Second part; 24. Shading part; 25. Second active layer; 26. Second gate; 27. Second source; 28. Second drain; 29. ​​Display module; 30. Backlight structure; 38. Display device; 39. Color filter layer; 40. Common electrode; 41. Support layer; 42. Second substrate; 43. Pixel electrode; 44. Liquid crystal; 45. Sealant; 46. Shading layer. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] A cross-sectional structure diagram of a display panel 10a in the related art is shown in FIG. Figure 1 As shown, Figure 1It can be seen that a buffer layer 31a, a first gate insulating layer 32a, a first dielectric layer 33a, a second gate insulating layer 34a, a third gate insulating layer 35a, a second dielectric layer 36a and a third dielectric layer 37a are stacked in sequence on the first substrate 11a, and the first metal portion 13a is located in the first dielectric layer 33a, wherein the buffer layer 31a and the first gate insulating layer 32a are both multi-layer film structures, the buffer layer 31a includes a silicon nitride layer and a silicon oxide layer stacked in a direction away from the first substrate 11a, the first gate insulating layer 32a includes a silicon oxide layer and a silicon nitride layer stacked in a direction away from the first substrate 11a, the first dielectric layer 33a is a silicon nitride layer, the second gate insulating layer 34a, the third gate insulating layer 35a and the second dielectric layer 36a are all silicon oxide layers, and the third dielectric layer 37a is a silicon nitride layer. Since there are many film layers of different materials between the first substrate and the first metal part 13a, and there are differences in refractive index, after the light from the back of the first substrate 11a passes through the first substrate 11a and enters the display panel 10a, the light will be reflected by the layers between the first substrate 11a and the first metal part 13a and by the first metal part 13a, and then irradiate the first active layer 14a after multiple reflections from the film layers. The light causes the threshold voltage of the first active layer 14a to drift, resulting in poor stability of the first active layer 14a.

[0029] As introduced above, the related art has a technical problem that the active layer of the display panel has poor stability. To solve the above technical problem, the embodiments of the present application provide a display panel, a display module and a display device.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] In this embodiment, a display panel is provided. Figure 2 The cross-sectional structure diagram of a display panel 10 according to an embodiment of the present application is exemplarily shown. Figure 2 As shown, the display panel 10 includes:

[0032] A first substrate 11;

[0033] Specifically, the first substrate 11 includes but is not limited to a glass substrate, an organic substrate, and a plastic substrate.

[0034] A first insulating layer 12, wherein the first insulating layer 12 is located on one side of the first substrate 11;

[0035] Specifically, the first insulating layer 12 may be in direct contact with the first substrate 11, that is, the first insulating layer 12 is located on the surface of the first substrate 11; the first insulating layer 12 may not be in contact with the first substrate 11, that is, other structural layers may be provided between the first insulating layer 12 and the first substrate 11. Optionally, the first insulating layer 12 functions as a buffer layer.

[0036] A first metal layer, the first metal layer comprising a first metal portion 13, the first metal portion 13 is located on a side of the first insulating layer 12 away from the first substrate 11;

[0037] Specifically, the first metal part 13 can be made of any feasible metal material, and there can be multiple first metal parts 13, which are arranged at intervals along the thickness direction perpendicular to the display panel. The first metal part 13 can be in direct contact with the first insulating layer 12, that is, the first metal part 13 is located on the surface of the first insulating layer 12; the first metal part 13 may not be in contact with the first insulating layer 12, that is, other structural layers can be arranged between the first metal part 13 and the first insulating layer 12.

[0038] The first active layer 14 is located on a side of the first metal portion 13 away from the first substrate 11 ; the first insulating layer 12 includes a hollow portion 15 , and along a thickness direction of the display panel 10 , the hollow portion 15 at least partially overlaps with the first active layer 14 .

[0039] Specifically, the light entering the display panel 10 from the side of the first substrate 11 away from the first insulating layer 12 will be reflected by the first metal part 13 and the first insulating layer 12, so as to propagate in the display panel 10, and part of the light will irradiate the first active layer 14. The material of the first active layer 14 includes but is not limited to oxide semiconductor and amorphous silicon. In the thickness direction of the display panel 10, the hollow portion 15 at least partially overlaps with the first active layer 14, that is, at least part of the corresponding area of ​​the first active layer 14 does not have the first insulating layer 12. In the thickness direction of the display panel 10, the hollow portion 15 may only partially overlap with the first active layer 14, or the hollow portion 15 may completely overlap with the first active layer 14, that is, the orthographic projection of the first active layer 14 on the first substrate 11 is located in the orthographic projection of the hollow portion 15 on the first substrate.

[0040] Through the above embodiments, the present application sets a hollow portion in at least a portion of the first insulating layer corresponding to the first active layer along the thickness direction of the display panel, that is, at least a portion of the first insulating layer in the region corresponding to the first active layer is removed, thereby reducing or even eliminating the amount of light entering the first active layer due to reflection from the first insulating layer, alleviating the problem of light reaching the first active layer after reflection, causing the threshold voltage of the first active layer to drift, and ensuring better display stability of the display panel.

[0041] Figure 2 The schematic diagram of the overlap between the hollow portion 15 and the two first active layers 14 is exemplarily shown. In a specific application process, the hollow portion 15 may overlap with only one of the first active layers 14, or may overlap with multiple (greater than two) first active layers 14.

[0042] Specifically, the first active layer 14 is an active layer of a first transistor, and the first transistor is a driving transistor of the display panel. In addition to the first active layer 14, the first transistor further includes a first gate 16, a first source 17 and a first drain 18. Figure 3 As shown, the first source electrode 17 and the first drain electrode 18 are respectively located on a side of the first active layer 14 away from the first metal layer. Figure 3 The first gate 16 is exemplarily shown as a top gate structure example, that is, the first gate 16 is also located on the side of the first active layer 14 away from the first metal layer, except Figure 3 In addition to the structure shown, the first gate 16 may also be a bottom gate structure, that is, the first gate 16 is located between the first active layer 14 and the first metal layer.

[0043] The first metal layer may be used as a gate of the first transistor, that is, the first transistor has a dual-gate structure.

[0044] The hollow portion 15 may be a hollow area or may be filled with an insulating material. In the case where the hollow portion 15 is filled with an insulating material, in order to reduce the reflection of light entering the display panel 10 from the side of the first substrate 11 away from the hollow portion 15 in the hollow portion 15, the hollow portion 15 may be filled with a single insulating material, and preferably a material having a refractive index similar to or the same as that of the material of the first substrate 11. For example, the material filled in the hollow portion 15 is the same as the material of the first substrate 11.

[0045] Optionally, the insulating material filled in the hollow portion is different from the material of the first insulating layer.

[0046] In actual application, when the first substrate is a glass substrate, it is often used in products such as liquid crystal display panels and OLED display panels, and has high transparency and excellent optical properties; when the substrate is an organic substrate (such as polyester film), it is often used in products such as flexible display panels and electronic paper, and has the characteristics of being light, soft, and anti-folding; when the first substrate is a plastic substrate (such as polyester, polycarbonate), it is often used in low-cost display panels, and has lower cost and better processing performance.

[0047] The first insulating layer 12 may be a single-layer structure or a stacked-layer structure, which will be described below in conjunction with specific embodiments.

[0048] Figure 4 The cross-sectional structure diagram of a display panel of the present application is exemplarily shown. Figure 4 The schematic diagram of the first insulating layer 12 as a single-layer structure is exemplarily shown. Of course, the first insulating layer 12 can also be a laminated structure. Figure 4 As shown, the display panel 10 further includes a second insulating layer 19, and the second insulating layer 19 is located between the first insulating layer 12 and the first metal layer, and the first insulating layer 12 and the second insulating layer 19 are made of different materials. In this embodiment, two insulating layers are included between the first active layer and the first substrate, and the two insulating layers are made of different materials. By providing a hollow portion in a partial area of ​​the first insulating layer corresponding to the first active layer, the problem of different refractive indices caused by different materials between the insulating layers, thereby causing light to be reflected to the first active layer and affecting the stability of the first active layer, is further avoided.

[0049] Figure 4 The embodiment in which the hollow portion 15 is filled is exemplarily shown. Figure 4 As shown, the first insulating layer 12 is located on the surface of the first substrate 11, the second insulating layer 19 is located on the surface of the first insulating layer 12, and the second insulating layer 19 fills the hollow portion 15, that is, the second insulating layer 19 is located on the surface of the first insulating layer 12 and on part of the surface of the first substrate 11.

[0050] Figure 5 The cross-sectional structure diagram of another display panel of the present application is exemplarily shown. Figure 5 The schematic diagram of the first insulating layer 12 being a laminated structure layer is exemplarily shown. Of course, the first insulating layer 12 can also be a single-layer structure layer. Figure 5As shown, the display panel 10 also includes a second insulating layer 19, which is located between the first insulating layer 12 and the first metal layer; the first insulating layer 12 includes a first insulating sublayer 20 and a second insulating sublayer 21, the first insulating sublayer 20 is made of the same material as the second insulating layer 19, and the second insulating sublayer 21 is made of a different material from the second insulating layer 19; the hollow portion 15 is located in the second insulating sublayer 21, that is, the first insulating layer 12 has the hollow portion 15 that penetrates the second insulating sublayer 21 along the thickness direction of the display panel 10. In the present embodiment, three insulating layers are included between the above-mentioned first active layer and the above-mentioned first substrate, and the materials between some of the insulating layers are different. By setting a hollow portion in a partial area of ​​the above-mentioned first insulating layer corresponding to the above-mentioned first active layer, that is, setting a hollow portion in a second sub-insulating layer whose material is different from that of the above-mentioned second insulating layer, the total reflection of light between the above-mentioned first substrate and the above-mentioned hollow portion can be eliminated, thereby further avoiding the problem of different refractive indices caused by different materials between the insulating layers, which causes light to be reflected to the first active layer and affects the stability of the above-mentioned first active layer.

[0051] The relative position relationship between the first insulating sublayer 20 and the second insulating sublayer 21 can be as follows: Figure 5 As shown, the second insulating sublayer 21 is located between the first substrate 11 and the first insulating sublayer 20 . Figure 5 An embodiment in which the hollow portion 15 is filled is shown as an example. Figure 5 As shown, the second insulating sublayer 21 and the first insulating sublayer 20 are stacked in sequence on the surface of the first substrate 11, the second insulating sublayer 21 has a hollow portion 15, the second insulating layer 19 is located on the surface of the first insulating sublayer 20, and the hollow portion 15 is filled with the same insulating material as the first insulating sublayer 20.

[0052] Of course, in addition to Figure 5 In addition to the embodiments shown, in other embodiments, the relative position relationship between the first insulating sublayer and the second insulating sublayer can also be that the first insulating sublayer is located between the first substrate and the second insulating sublayer, that is, the first insulating sublayer and the second insulating sublayer are sequentially stacked on the surface of the first substrate, the second insulating sublayer has a hollow portion, the second insulating layer is located on the surface of the first insulating sublayer, and the hollow portion is filled with the same insulating material as that of the second insulating layer.

[0053] like Figure 5As shown, the first insulating sublayer 20 includes a first portion 22 and a second portion 23. Along the thickness direction of the display panel 10, the first portion 22 overlaps with the hollow portion 15, and the second portion 23 does not overlap with the hollow portion 15; along the thickness direction of the display panel, the thickness D1 of the first portion 22 is greater than the thickness D2 of the second portion 23. Part of the first portion 22 is filled in the hollow portion 15, and in order to keep the surface of the first insulating sublayer 20 close to the first metal layer flat, the thickness D1 of the first portion 22 is greater than the thickness D2 of the second portion 23.

[0054] Furthermore, if Figure 5 As shown, the hollow portion 15 is filled with an insulating material, and the insulating material filled with the hollow portion 15 can be the same as the material of the first portion 22, so that the upper surface of the first insulating layer 12 after the hollow portion 15 is filled can be relatively flat. In the actual manufacturing process, the hollow portion 15, the first portion 22 and the second portion 23 can be formed by one process; or the hollow portion 15, the first portion 22 and the second portion 23 can be formed by two processes, that is, the hollow portion 15 filled with an insulating material is first formed, and then the first insulating sub-layer 20 including the first portion 22 and the second portion 23 is formed on the hollow portion 15 and the second insulating sub-layer 21.

[0055] Considering the overall flatness requirement of the display panel, the surface of the first portion 22 away from the first substrate 11 is flush with the surface of the second portion 23 away from the first substrate 11 .

[0056] In some exemplary embodiments of the present application, the refractive index of the first insulating sublayer 20 is equal to that of the first substrate 11. When the light incident from the first substrate enters the first insulating sublayer 20 from the first substrate 11, it is equivalent to propagating in a material with a refractive index, so the light will not be reflected at the contact surface between the first insulating sublayer 20 and the first substrate 11, further reducing or even eliminating the amount of light entering the first active layer due to reflection from the first insulating layer, thereby further alleviating the problem of threshold voltage drift of the first active layer caused by light irradiating the first active layer.

[0057] Specifically, the same material may be selected to manufacture the first insulating sublayer and the first substrate, or different materials but with the same refractive index may be selected to manufacture the first insulating sublayer and the first substrate.

[0058] Considering the actual working conditions, in the actual application process, materials with similar refractive indexes can also be selected to make the first insulating sublayer and the first substrate. In other words, the refractive index difference between the first insulating sublayer and the first substrate is small.

[0059] In some exemplary embodiments, the material of the first active layer includes oxide, the material of the first insulating sublayer includes silicon oxide, and the material of the second insulating sublayer includes silicon nitride.

[0060] In a more specific embodiment, the material of the first active layer is IGZO. The materials of the first insulating sublayer and the second insulating layer are both silicon oxide; the material of the second insulating sublayer is silicon nitride. The first substrate is a glass first substrate. Since the material of the first substrate is a silicon-based material, the refractive index of silicon oxide is close to that of the first substrate, and the light on the back side of the first substrate 11 enters the first insulating sublayer and the second insulating sublayer from the first substrate. There is basically no reflection, which further reduces the amount of light entering the first active layer due to reflection from the first insulating layer.

[0061] When the display panel is a liquid crystal display panel, a backlight structure is disposed on the back of the first substrate, and the backlight structure is used to provide light for the liquid crystal display panel, and the light from the back of the first substrate can be the light provided by the backlight structure. The arrangement of the present application can also reduce the situation where the light of the backlight structure is refracted back to the backlight structure multiple times, thereby improving the light utilization rate of the backlight structure.

[0062] In addition, the first active layer includes a channel region, such as Figures 3 to 5 As shown, the display panel 10 further includes: a light shielding portion 24, the light shielding portion 24 is located between the first substrate 11 and the first active layer 14, and the light shielding portion 24 at least partially overlaps with the channel region along the thickness direction of the display panel 10. By arranging the light shielding portion corresponding to the channel region to shield the light, the light irradiation to the channel region is reduced or even avoided, and the stability of the first active layer is further maintained.

[0063] Specifically, along the thickness direction of the display panel 10, the light shading portion 24 may partially overlap with the channel region; the light shading portion 24 may also completely overlap with the channel region, that is, the orthographic projection of the light shading portion 24 on the first substrate 11 covers the orthographic projection of the channel region on the first substrate 11, and the light shading effect of complete overlap is better than the light shading effect of partial overlap.

[0064] Moreover, along the thickness direction of the display panel 10, the hollow portion 15 may partially overlap with the channel region; the hollow portion 15 may also completely overlap with the channel region, that is, the orthographic projection of the hollow portion 15 on the first substrate 11 covers the orthographic projection of the channel region on the first substrate 11, and the shading effect of complete overlap is better than the shading effect of partial overlap.

[0065] Those skilled in the art can flexibly set the specific position of the above-mentioned light shielding portion. For example, Figures 3 to 5 As shown, the light shielding portion 24 is located between the first substrate 11 and the first metal layer. In addition, along the thickness direction of the display panel 10, the light shielding portion 24 at least partially overlaps with the first metal portion 13. The light shielding portion also serves to shield the light irradiated from the first substrate side to the first metal portion, thereby reducing the reflection of the first metal portion.

[0066] Specifically, along the thickness direction of the display panel 10, the thickness of the light shielding portion 24 is less than or equal to 5 nm. On this basis, the light shielding portion 24 is also located in the hollow portion 15 and on the surface of the first substrate 11. By providing the light shielding portion with a smaller thickness on the surface of the first substrate 11, the light reflection between the first substrate 11 and the filling material of the hollow portion 15 can be reduced, so as to achieve the effect of matching the refractive index between the first substrate and the hollow portion.

[0067] Those skilled in the art can select any suitable shading material as the material of the shading portion. In the present application, metal molybdenum is used as the shading portion. Molybdenum has the characteristics of large refractive index and being substantially transparent, and can substantially eliminate the total reflection of light between the first substrate and the hollow portion, thereby further reducing the light reaching the first active layer.

[0068] According to some other optional solutions of this application, such as Figures 3 to 5 As shown, the display panel 10 further includes: a second active layer 25 , wherein the second active layer 25 is located between the first metal layer and the first insulating layer 12 , and the first active layer 14 and the second active layer 25 are made of different materials.

[0069] Specifically, the second active layer 25 is an active layer of a second transistor, and the second transistor is a driving transistor of the display panel. In addition to the second active layer 25, the second transistor further includes a second gate 26, a second source 27 and a second drain 28. Figures 3 to 5 As shown, the second source 27 and the second drain 28 are respectively located on the side of the second active layer 25 away from the first metal layer, and the second gate 26 is located in the first metal layer, that is, the second gate 26 is arranged in the same layer as the first metal portion 13. Figures 3 to 5 The second gate 26 is exemplarily shown as a top gate structure example, except Figures 3 to 5 In addition to the structure shown, the second gate 26 may also be a bottom gate structure, that is, the second gate 26 is located between the second active layer 25 and the first metal layer. In addition to the above embodiment, the second transistor may also be a double gate structure.

[0070] Since the second active layer is located in the non-display area and a light shielding material is disposed on the back of the first substrate 11, the second active layer is less affected by the light from the back of the first substrate 11, and therefore no hollow portion is disposed below the second active layer 25. Optionally, when the display panel 10 is a liquid crystal display panel, a backlight module (not shown in the figure) is disposed on the back of the display panel 10, and the light shielding material may be a light shielding tape, which may be disposed on the back of the first substrate 11 or in the backlight module.

[0071] The materials of the first active layer and the second active layer may be the same or different. In the present application, the material of the second active layer is LTPS, and the material of the first active layer is IGZO.

[0072] Specifically, the display panel 10 includes a display area 101 and a non-display area 102. The non-display area 102 is at least located on one side of the display area 101. Figures 3 to 5 As shown, the first active layer 14 is located in the display area 101 of the display panel 10 , and the second active layer 25 is located in the non-display area 102 of the display panel 10 .

[0073] In addition, since the light drift characteristic of the second active layer is not obvious, the hollow portion is not provided in the area of ​​the first insulating layer corresponding to the second active layer. That is, the hollow portion and the second portion are located in the display area. Since the stacked structure composed of the second insulating sublayer and the second portion can prevent the metal ions in the first substrate from diffusing into the display panel, the second insulating sublayer and the second portion are provided in the non-display area without the first active layer.

[0074] In a specific embodiment, the specific structure of the display panel is as follows: Figure 5 As shown, Figure 5 In the embodiment, the first substrate is a glass first substrate, the material filled in the hollow portion is silicon oxide, the first insulating sublayer is a silicon oxide layer, the second insulating sublayer is a silicon nitride layer, the second insulating layer is a silicon oxide layer, the material of the light shielding portion is molybdenum, and the material of the first metal portion is molybdenum. The thickness and refractive index of each layer are shown in Table 1.

[0075] Table 1

[0076]

[0077] and Figure 1Compared with the prior art scheme shown in FIG. 1 , “a buffer layer, a first gate insulating layer, a first dielectric layer and a second gate insulating layer are sequentially stacked between the first glass substrate and the first active layer, the buffer layer is composed of a silicon nitride layer and a silicon oxide layer sequentially stacked in a direction away from the first glass substrate, the first gate insulating layer is composed of a silicon oxide layer and a silicon nitride layer sequentially stacked in a direction away from the first glass substrate, the first dielectric layer is a silicon nitride layer, and the second gate insulating layer is a silicon oxide layer” (the thickness and refractive index of each film layer corresponding to the prior art scheme are shown in Table 2), the present application has a 3D-type gate insulating layer with a 3D-type gate insulating layer and a 3D-type gate insulating layer. Figure 5 The solution removes the buffer layer in the region corresponding to the first active layer and the silicon nitride layer in the first gate insulating layer, and the existing solution and the present application are simulated to obtain Figure 5 The light reflectivity of the display panel of the scheme is shown in the comparison chart below. Figure 6 As shown, it can be seen, Figure 5 The reflectivity of the light incident from the side of the first substrate away from the first active layer (hereinafter referred to as the back light) of the display panel corresponding to the solution is less than 10%, while the reflectivity of the back light corresponding to the existing solution is about 40%. Figure 5 In this solution, the amount of back light incident on the first active layer is 1 / 4 of that in the existing solution, which effectively reduces the amount of back light incident on the first active layer.

[0078] Table 2

[0079] Film thickness Refractive Index First substrate 0.5mm 1.5 Silicon nitride layer 120nm 1.8 Silicon oxide layer 300nm 1.5 Silicon oxide layer 80nm 1.5 Silicon nitride layer 40nm 1.8 First Metal Department 300nm 2.7

[0080] An embodiment of the present application further provides a display module, and the display module includes any one of the above-mentioned display panels.

[0081] The above-mentioned display module includes any one of the above-mentioned display panels, which is provided with a hollow portion in at least a partial area of ​​the above-mentioned first insulating layer corresponding to the above-mentioned first active layer along the thickness direction of the above-mentioned display panel, that is, at least a part of the first insulating layer in the area corresponding to the above-mentioned first active layer is removed, thereby reducing or even eliminating the amount of light entering the above-mentioned first active layer due to reflection from the first insulating layer, alleviating the problem of light reaching the above-mentioned first active layer after reflection, causing the threshold voltage drift of the above-mentioned first active layer, and ensuring that the display stability of the display module is better.

[0082] In addition, if Figure 7 As shown, the display module 29 further includes: a backlight structure 30 located on a side of the first substrate 11 of the display panel 10 away from the first insulating layer 12 of the display panel 10 .

[0083] In the display module of the present application, the backlight structure 30 is used to provide a light source for the display panel 10. The backlight light enters the display panel 10 from the first substrate of the display panel 10, passes through the light emitting surface of the display panel 10 along the thickness direction of the display panel 10, and is seen by the human eye. In the present application, a hollow portion 15 is provided in the first insulating layer 12 below the above-mentioned first active layer 14, so as to reduce the light reflection phenomenon caused by the multi-layer structure of the first insulating layer 12, thereby reducing the amount of light reflected to the first active layer 14 and avoiding the light drift problem of the first active layer 14, and reducing the amount of light that cannot pass through the light emitting surface of the display panel 10 due to the total reflection of the first insulating layer 12, so that more light can pass through the light emitting surface of the display panel 10, so that the light emitted from the backlight structure 30 to the display panel 10 can be fully utilized, thereby improving the light utilization rate of the backlight structure 30, avoiding the waste of light sources, and further improving the energy utilization rate and brightness of the display module.

[0084] Specifically, the backlight structure 30 may include a back panel, a plastic frame, a backlight source, a light guide plate, a reflective layer and other optical films.

[0085] The display module further includes a first polarizer and a second polarizer. The first polarizer is located between the display panel and the backlight structure, and the second polarizer is located on a surface of the display panel away from the backlight structure.

[0086] like Figure 7 As shown, the display panel 10 further includes a color filter layer 39 . The color filter layer 39 is located on a side of the first active layer 14 away from the first substrate 11 . Figure 7 2 shows an embodiment in which the color filter layer is located on a side of the liquid crystal layer of the display panel close to the backlight structure. In other exemplary embodiments, the color filter layer may also be located on a side of the liquid crystal layer away from the backlight structure.

[0087] Optionally, the display panel 10 further includes a light shielding layer 46, which is disposed in the same layer as the color filter layer 39 and arranged alternately. The light shielding layer 46 can reduce crosstalk between lights of different colors and can also reduce reflection caused by external light irradiating the metal.

[0088] like Figure 7 As shown, the display panel 10 further includes: a pixel electrode 43, electrically connected to the source or drain of the driving transistor; a common electrode 40, located on a side of the pixel electrode 43 away from the driving transistor, the common electrode 40 is used to provide a reference voltage, and an electric field is formed between the common electrode 40 and the pixel electrode 43; a plurality of support layers 41 arranged at intervals, used to support the display panel; a liquid crystal 44, located between the plurality of support layers 41; a sealant 45, located on a side of the outermost support layer 41 away from other support layers 41; and a second substrate 42, located on a side of the support layer away from the common electrode 40.

[0089] Figure 7 The embodiment in which the common electrode 40 is on the top and the pixel electrode 43 is on the bottom is shown by way of example. Figure 7 In addition to the illustrated embodiment, the relative positional relationship between the common electrode 40 and the pixel electrode 43 may also be that the common electrode 40 is at the bottom and the pixel electrode 43 is at the top, or the common electrode 40 and the pixel electrode 43 are arranged in the same layer.

[0090] The embodiment of the present application also provides a Figure 8 The display device 38 shown includes any one of the display modules 29 described above.

[0091] The above-mentioned display device includes the above-mentioned display module. In the above-mentioned display module, the display panel is provided with a hollow portion in at least a partial area of ​​the above-mentioned first insulating layer corresponding to the above-mentioned first active layer along the thickness direction of the above-mentioned display panel, that is, at least a part of the first insulating layer in the area corresponding to the above-mentioned first active layer is removed, thereby reducing or even eliminating the amount of light entering the above-mentioned first active layer due to reflection from the first insulating layer, alleviating the problem that the threshold voltage of the above-mentioned first active layer drifts due to the light reaching the above-mentioned first active layer after reflection, thereby ensuring that the display stability of the display device is better.

[0092] The above-mentioned display devices include but are not limited to televisions, smart phones, tablet computers, e-book readers, car infotainment system screens, dashboards, medical equipment displays, industrial control panels, and digital signage.

[0093] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0094] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0095] 1) In the display panel of the present application, a hollow portion is provided in at least a portion of the first insulating layer corresponding to the first active layer along the thickness direction of the display panel, that is, at least a portion of the first insulating layer in the region corresponding to the first active layer is removed, thereby reducing or even eliminating the amount of light entering the first active layer due to reflection from the first insulating layer, alleviating the problem of threshold voltage drift of the first active layer caused by light reaching the first active layer after reflection, and ensuring better display stability of the display panel.

[0096] 2) The display module of the present application includes any one of the above-mentioned display panels, which is provided with a hollow portion in at least a portion of the area of ​​the above-mentioned first insulating layer corresponding to the above-mentioned first active layer along the thickness direction of the above-mentioned display panel, that is, at least a portion of the first insulating layer in the area corresponding to the above-mentioned first active layer is removed, thereby reducing or even eliminating the amount of light entering the above-mentioned first active layer due to reflection from the first insulating layer, alleviating the problem of threshold voltage drift of the above-mentioned first active layer caused by light reaching the above-mentioned first active layer after reflection, and ensuring good display stability of the display module.

[0097] 3) The display device of the present application includes the above-mentioned display module, in which the display panel is provided with a hollow portion in at least a portion of the area of ​​the above-mentioned first insulating layer corresponding to the above-mentioned first active layer along the thickness direction of the above-mentioned display panel, that is, at least a portion of the first insulating layer in the area corresponding to the above-mentioned first active layer is removed, thereby reducing or even eliminating the amount of light entering the above-mentioned first active layer due to reflection from the first insulating layer, alleviating the problem of light reaching the above-mentioned first active layer after reflection, causing the threshold voltage drift of the above-mentioned first active layer, and ensuring good display stability of the display device.

[0098] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: a first substrate; a first insulating layer, wherein the first insulating layer is located on one side of the first substrate; a first metal layer, the first metal layer comprising a first metal portion, the first metal portion being located on a side of the first insulating layer away from the first substrate; a first active layer, wherein the first active layer is located on a side of the first metal portion away from the first substrate; The first insulating layer includes a hollow portion, and along a thickness direction of the display panel, the hollow portion at least partially overlaps with the first active layer.

2. The display panel according to claim 1, characterized in that: The display panel further includes a second insulating layer, which is located between the first insulating layer and the first metal layer, and the first insulating layer and the second insulating layer are made of different materials.

3. The display panel according to claim 1, characterized in that: The display panel also includes a second insulating layer, which is located between the first insulating layer and the first metal layer; the first insulating layer includes a first insulating sublayer and a second insulating sublayer, the first insulating sublayer and the second insulating layer are made of the same material, and the second insulating sublayer and the second insulating layer are made of a different material; the hollow portion is located in the second insulating sublayer.

4. The display panel according to claim 3, characterized in that: The first insulating sublayer includes a first portion and a second portion. Along the thickness direction of the display panel, the first portion overlaps with the hollow portion, and the second portion does not overlap with the hollow portion. Along the thickness direction of the display panel, the thickness of the first portion is greater than the thickness of the second portion.

5. The display panel according to claim 3, characterized in that: The first insulating sublayer and the first substrate have the same refractive index.

6. The display panel according to claim 3, characterized in that: A material of the first active layer includes oxide, and a material of the first insulating sublayer includes silicon oxide.

7. The display panel according to claim 1, characterized in that: The first active layer includes a channel region, and the display panel further includes: A light shielding portion is located between the first substrate and the first active layer, and along a thickness direction of the display panel, the light shielding portion at least partially overlaps with the channel region.

8. The display panel according to claim 7, characterized in that: Along the thickness direction of the display panel, the thickness of the light shielding portion is less than or equal to 5 nm.

9. The display panel according to claim 1, characterized in that: The display panel further includes: A second active layer, wherein the second active layer is located between the first metal layer and the first insulating layer, and the first active layer and the second active layer are made of different materials.

10. The display panel according to claim 9, characterized in that: The first active layer is located in a display area of ​​the display panel, and the second active layer is located in a non-display area of ​​the display panel.

11. A display module, characterized in that: include: The display panel according to any one of claims 1 to 10.

12. The display module according to claim 11, characterized in that: The display module also includes: The backlight structure is located on a side of the first substrate of the display panel away from the first insulating layer of the display panel.

13. A display device, characterized in that: Includes the display module described in claim 11 or 12.

Images