Display panel and display device

Abstract

The present invention provides a display panel and a display device. The display panel includes a non-opening area and an opening area. The display panel includes a substrate, which is located on a side away from the light-emitting surface of the display panel. The substrate includes a first substrate layer, a second substrate layer, and a third substrate layer; a first interface is formed between the second substrate layer and the first substrate layer; a second interface is formed between the third substrate layer and the second substrate layer; in the present invention, a first concave surface is formed in at least one of the first interface and the second interface in the non-opening area, and the depression direction of the first concave surface faces the side with a larger refractive index among the two sides of the first concave surface, so that the first concave surface can refract the light incident from the side away from the light-emitting surface of the display panel into the non-opening area to the opening area, and after changing the propagation direction of the light, the light enters the opening area and exits, thereby improving the light efficiency of the display panel and enhancing the optical performance of the display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] In recent years, the technology of thin film transistor liquid crystal displays (TFT-LCDs) has been developing in the direction of low power consumption, high brightness, and improved light utilization rate. Among them, improving the penetration performance can significantly enhance the brightness of TFT-LCDs and reduce power consumption, which is a difficult problem that panel manufacturers around the world are trying to overcome.

[0003] The light efficiency of a TFT-LCD refers to the ratio of the light intensity before and after the backlight passes through the display panel. Usually, the light efficiency of a TFT-LCD is only 3% - 10%, that is to say, more than 90% of the light cannot be utilized. For the non-opening area of the display panel, the light incident from the backlight direction will be absorbed by the light-impermeable film material, resulting in light efficiency loss. Therefore, it is necessary to improve this defect. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel to solve the technical problem that the light incident in the non-opening area of the display panel in the prior art is absorbed by the light-impermeable film material, resulting in light efficiency loss.

[0005] Embodiments of the present invention provide a display panel, including a non-opening area and a plurality of opening areas. The non-opening area is located between adjacent opening areas. The display panel includes a substrate, which is located on a side away from the light-emitting surface of the display panel. The substrate includes a first substrate layer, a second substrate layer, and a third substrate layer. The second substrate layer is located on the first substrate layer, and a first interface is formed between the second substrate layer and the first substrate layer. The refractive index of the second substrate layer is greater than that of the first substrate layer. The third substrate layer is located on the second substrate layer, and a second interface is formed between the third substrate layer and the second substrate layer. The refractive index of the third substrate layer is less than that of the second substrate layer. Wherein, at least one of the first interface and the second interface forms a first concave surface in the non-opening area, and the concave direction of the first concave surface faces the side with a larger refractive index among the two sides of the first concave surface.

[0006] In the display panel provided by the embodiments of the present invention, at least one of the first interface and the second interface forms a second concave surface in the opening area, and the concave direction of the second concave surface faces the side with a smaller refractive index among the two sides of the second concave surface.

[0007] In the display panel provided by the embodiment of the present invention, the display panel includes an active layer located in the non-opening area, the active layer is located on the substrate, and the active layer includes a channel region and a source contact region and a drain contact region respectively located on both sides of the channel region; wherein, the orthographic projection of the channel region on the substrate is located within the first concave surface.

[0008] In the display panel provided by the embodiment of the present invention, the display panel includes a light-shielding layer, and the light-shielding layer is located between the first substrate layer and the active layer; wherein, the orthographic projection of the channel region on the light-shielding layer is located on the light-shielding layer, and the orthographic projection of the light-shielding layer on the substrate is located within the first concave surface.

[0009] In the display panel provided by the embodiment of the present invention, the first substrate layer is a glass substrate, the second substrate layer is a silicon nitride layer, and the third substrate layer is a silicon oxide layer; wherein, the active layer is located on the surface of the silicon oxide layer away from the silicon nitride layer, and the light-shielding layer is located on the surface of the glass substrate close to the active layer.

[0010] In the display panel provided by the embodiment of the present invention, in the light-emitting side direction of the display panel, the thickness of the silicon oxide layer is greater than the thickness of the silicon nitride layer.

[0011] In the display panel provided by the embodiment of the present invention, the first substrate layer is a silicon oxide layer, the second substrate layer is a silicon nitride layer, and the third substrate layer is a glass substrate; wherein, a barrier layer is provided between the glass substrate and the active layer, and the light-shielding layer is located on the surface of the glass substrate close to the active layer.

[0012] In the display panel provided by the embodiment of the present invention, in the light-emitting side direction of the display panel, the cross-sectional shapes of the first concave surface and the second concave surface are arc-shaped or trapezoidal.

[0013] In the display panel provided by the embodiment of the present invention, in the light-emitting side direction of the display panel, the heights of the first concave surface and the second concave surface are both greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers; in the direction perpendicular to the light-emitting side direction of the display panel, the maximum widths of the first concave surface and the second concave surface are both greater than or equal to 5 micrometers and less than or equal to 20 micrometers.

[0014] In the display panel provided by the embodiment of the present invention, the display panel includes a black matrix layer, the black matrix layer is located on the substrate, and the black matrix layer completely overlaps with the non-opening area.

[0015] In the display panel provided by the embodiment of the present invention, a plurality of the opening regions are arranged in an array, the non-opening region includes a first non-opening sub-region and a second non-opening sub-region, the first non-opening sub-region is located between two adjacent columns of the opening regions, and the second non-opening sub-region is located between two adjacent rows of the opening regions; wherein, in the row direction, the difference between the width of the first non-opening sub-region and the maximum width of the first concave surface located in the first non-opening sub-region is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer; in the column direction, the difference between the width of the second non-opening sub-region and the maximum width of the first concave surface located in the second non-opening sub-region is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0016] In the display panel provided by the embodiment of the present invention, in the direction perpendicular to the light-emitting side of the display panel, the maximum width of the first concave surface located in the first non-opening sub-region is smaller than the maximum width of the first concave surface located in the second non-opening sub-region.

[0017] In the display panel provided by the embodiment of the present invention, the distance between the orthographic projection of the black matrix layer on the substrate and the edge of the adjacent second concave surface is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0018] The embodiment of the present invention further provides a display device, including a backlight module and the above-mentioned display panel, and the display panel is located on the light-emitting side of the backlight module.

[0019] Beneficial effects: A display panel provided by the embodiment of the present invention includes a non-opening region and a plurality of opening regions. The non-opening region is located between adjacent opening regions. The display panel includes a substrate, and the substrate is located on the side away from the light-emitting surface of the display panel. The substrate includes a first substrate layer, a second substrate layer, and a third substrate layer; a first interface is formed between the second substrate layer and the first substrate layer, and the refractive index of the second substrate layer is greater than that of the first substrate layer; a second interface is formed between the third substrate layer and the second substrate layer, and the refractive index of the third substrate layer is less than that of the second substrate layer; in the present invention, a first concave surface is formed in at least one of the non-opening regions of the first interface and the second interface, and the concave direction of the first concave surface faces the side with a larger refractive index among the two sides of the first concave surface, so that the first concave surface can refract the light incident from the side away from the light-emitting surface of the display panel into the opening region, and after changing the propagation direction of the light, the light enters the opening region and exits, thereby improving the light efficiency of the display panel and enhancing the optical performance of the display panel. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0021] Figure 1 It is a top view of a display panel provided by an embodiment of the present invention.

[0022] Figure 2 It is a first structural schematic diagram of a display panel provided by an embodiment of the present invention.

[0023] Figure 3 It is a second structural schematic diagram of a display panel provided by an embodiment of the present invention.

[0024] Figure 4 It is a third structural schematic diagram of a display panel provided by an embodiment of the present invention.

[0025] Figure 5 It is a top view of another display panel provided by an embodiment of the present invention.

[0026] Figures 6a to 6g It is a basic structural schematic diagram of each component in the manufacturing process flow of a display panel provided by an embodiment of the present invention.

[0027] Figure 7 It is a basic structural schematic diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. In the accompanying drawings, for the sake of clarity, understanding and description, the sizes and thicknesses of the components shown are not drawn to scale.

[0029] It should be noted that for the non-opening area of the display panel, the light incident from the backlight direction will be absorbed by the light-impermeable film material, resulting in light efficiency loss, and the embodiments of the present invention can solve the above defects.

[0030] Such as Figure 1 、 Figure 2As shown, they are respectively a top view of a display panel provided by an embodiment of the present invention and a first structural schematic diagram of the display panel. The display panel includes a non-opening area A1 and a plurality of opening areas A2. The non-opening area A1 is located between adjacent opening areas A2. The display panel includes a substrate 100, and the substrate 100 is located on a side away from the light-emitting surface of the display panel. The substrate 100 includes a first substrate layer 101, a second substrate layer 102, and a third substrate layer 103. The second substrate layer 102 is located on the first substrate layer 101, and a first interface S1 is formed between the second substrate layer 102 and the first substrate layer 101. The refractive index of the second substrate layer 102 is greater than that of the first substrate layer 101. The third substrate layer 103 is located on the second substrate layer 102, and a second interface S2 is formed between the third substrate layer 103 and the second substrate layer 102. The refractive index of the third substrate layer 103 is less than that of the second substrate layer 102. Wherein, at least one of the first interface S1 and the second interface S2 forms a first concave surface 1011 in the non-opening area A1, and the concave direction of the first concave surface 1011 faces the side with a larger refractive index among the two sides of the first concave surface 1011.

[0031] It should be noted that the fact that the substrate 100 is located on a side away from the light-emitting surface of the display panel means that: the substrate 100 is disposed close to the backlight module 300 (such as Figure 7 ). The light emitted from the backlight module 300, for the incident light corresponding to the non-opening area A1, first passes through the first concave surface 1011 and is refracted, and then exits from the opening area A2 after changing the propagation direction, thereby improving the light efficiency of the display panel and the light utilization rate. As Figure 1 shown, a plurality of first concave surfaces 1011 provided by the embodiment of the present invention are uniformly distributed in the entire non-opening area A1, which can greatly improve the light utilization rate.

[0032] Specifically, Figure 2 only the case where a first concave surface 1011 is formed in the non-opening area A1 of the second interface S2 is taken as an example for description. Since the refractive index of the third substrate layer 103 is less than that of the second substrate layer 102, the concave direction of the first concave surface 1011 faces the second substrate layer 102. According to the formula n1Sinθ1 = n2Sinθ2, it can be known that when light enters a low-refractive-index film layer from a high-refractive-index film layer, the exit angle increases. Therefore, when light enters the third substrate layer 103 from the second substrate layer 102, the incident angle a1 is less than the exit angle a2, that is, the light will diverge in the first concave surface 1011. Therefore, the light in the non-opening area A1 can be refracted into the opening area A2, thereby improving the light efficiency of the display panel.

[0033] In one embodiment, at least one of the first interface S1 and the second interface S2 forms a second concave surface 1021 in the opening area A2, and the concave direction of the second concave surface 1021 faces the side with a smaller refractive index among the two sides of the second concave surface 1021.

[0034] Specifically, Figure 2 Taking the example that only the second concave surface 1021 is formed in the opening area A2 of the first interface S1, since the refractive index of the first substrate layer 101 is less than that of the second substrate layer 102, the concave direction of the second concave surface 1021 faces the first substrate layer 101. According to the formula n1Sinθ1 = n2Sinθ2, when light enters a high-refractive-index film layer from a low-refractive-index film layer, the exit angle decreases. Therefore, when light enters the second substrate layer 102 from the first substrate layer 101, the incident angle c1 is greater than the exit angle c2, that is, the light will converge in the second concave surface 1021. Therefore, the light efficiency and brightness of the opening area A2 can be improved. If the first concave surface 1011 and the second concave surface 1021 are combined, all the light of the display panel can be utilized, and the overall light efficiency of the display panel can be improved.

[0035] In one embodiment, in the light-emitting side direction of the display panel, the cross-sectional shapes of the first concave surface 1011 and the second concave surface 1021 are arc-shaped or trapezoidal. In this embodiment, the first concave surface 1011 is a three-dimensional microprism structure and has the function of diverging light; the second concave surface 1021 is a three-dimensional microprism structure and has the function of converging light.

[0036] In one embodiment, in the light-emitting side direction of the display panel, the height h1 of the first concave surface 1011 and the height h2 of the second concave surface 1021 are both greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers; in the direction perpendicular to the light-emitting side direction of the display panel, the maximum width w1 of the first concave surface 1011 and the maximum width w2 of the second concave surface 1021 are both greater than or equal to 5 micrometers and less than or equal to 20 micrometers.

[0037] In one embodiment, the display panel includes an active layer 40 located in the non-opening area A1. The active layer 40 is located on the substrate 100. The active layer 40 includes a channel region 401 and a source contact region 402 and a drain contact region 403 respectively located on both sides of the channel region 401. Among them, the orthographic projection of the channel region 401 on the substrate 100 is located in the first concave surface 1011.

[0038] It can be understood that a conventional display panel generally has a light-shielding layer to prevent light from irradiating the channel region of the active layer. Since the first concave surface 1011 of this embodiment can diffuse the light in the non-opening region A1 into the opening region A2, by making the orthographic projection of the channel region 401 on the substrate 100 located within the first concave surface 1011 in this embodiment, light can be prevented from irradiating the channel region 401 of the active layer 40. Therefore, adopting the solution of this embodiment also has the effect of being able to omit the light-shielding layer.

[0039] In one embodiment, the display panel further includes a gate insulating layer 41, a gate layer 42, an interlayer insulating layer 43, a source layer 441, a drain layer 442, a planarization layer 45, a bottom electrode 46, a passivation layer 47, and a top electrode 48; the gate insulating layer 41 is located on the active layer 40; the gate layer 42 is located on the gate insulating layer 41; the interlayer insulating layer 43 is located on the gate layer 42, and the interlayer insulating layer 43 includes a first insulating layer 431 and a second insulating layer 432; the source layer 441 and the drain layer 442 are located on the interlayer insulating layer 43, the source layer 441 is electrically connected to the source contact region 402 through a via, and the drain layer 442 is electrically connected to the drain contact region 403 through a via; the planarization layer 45 is located on the source layer 441 and the drain layer 442; the bottom electrode 46 is located on the planarization layer 45; the passivation layer 47 is located on the bottom electrode 46; the top electrode 48 is located on the passivation layer 47, and the top electrode 48 is electrically connected to the drain layer 442 through a via.

[0040] Next, please refer to Figure 3 , which is the second structural schematic diagram of the display panel provided by the embodiment of the present invention. Different from the first structure of Figure 2 , in this embodiment, the display panel includes a light-shielding layer 20, and the light-shielding layer 20 is located between the first substrate layer 101 and the active layer 40; wherein, the orthographic projection of the channel region 401 on the light-shielding layer 20 is located on the light-shielding layer 20, and the orthographic projection of the light-shielding layer 20 on the substrate 100 is located within the first concave surface 1011.

[0041] It should be noted that since not all of the light incident within the first concave surface 1011 can avoid the channel region 401, therefore, in this embodiment, a light-shielding layer 20 is still provided at the position corresponding to the channel region 401, which can ensure that light cannot enter the channel region 401, making the performance of the active layer 40 more stable. In addition, the light that is not blocked by the light-shielding layer 20 within the first concave surface 1011 can still enter the opening region A2 after refraction. Therefore, the light efficiency can also be improved to a certain extent.

[0042] In one embodiment, the first substrate layer 101 is a glass substrate, the second substrate layer 102 is a silicon nitride layer, and the third substrate layer 103 is a silicon oxide layer; wherein, the active layer 40 is located on the surface of the silicon oxide layer away from the silicon nitride layer, and the light shielding layer 20 is located on the surface of the glass substrate close to the active layer 40.

[0043] It can be understood that in this embodiment, the active layer 40 can be directly fabricated on the silicon oxide layer, that is, the silicon nitride layer and the silicon oxide layer can be reused as the buffer layer and the barrier layer of the display panel. Therefore, the thickness of the display panel will not be increased additionally. In other embodiments, the first substrate layer 101, the second substrate layer 102, and the third substrate layer 103 can also be made of other high transmittance insulating materials to improve the light transmittance and the light efficiency.

[0044] In one embodiment, in the light-emitting direction of the display panel, the thickness of the silicon oxide layer is greater than that of the silicon nitride layer.

[0045] It can be understood that in this embodiment, by making the thickness of the silicon oxide layer greater than that of the silicon nitride layer, after the light is refracted by the first concave surface 1011, it passes through the silicon oxide layer with a larger thickness. Therefore, there is enough distance for the light to change its propagation direction before reaching other film layers on the silicon oxide layer, so that more light can be refracted into the opening area A2, making the light efficiency higher.

[0046] Next, please refer to Figure 4 , which is the third schematic structural diagram of the display panel provided by the embodiment of the present invention. Figure 4 Only the case where the first concave surface 1011 is formed in the non-opening area A1 of the first interface S1 is taken as an example for illustration. Since the refractive index of the first substrate layer 101 is less than that of the second substrate layer 102, the concave direction of the first concave surface 1011 faces the second substrate layer 102. Figure 4 Only the case where the second concave surface 1021 is formed in the opening area A2 of the second interface S2 is taken as an example for illustration. Since the refractive index of the third substrate layer 103 is less than that of the second substrate layer 102, the concave direction of the second concave surface 1021 faces the third substrate layer 103.

[0047] It can be understood that in this embodiment, since the refractive index of the first substrate layer 101 is less than that of the second substrate layer 102, according to the formula n1Sinθ1 = n2Sinθ2, the exit angle decreases when the light enters the high refractive index film layer from the low refractive index film layer. Therefore, when the light enters the second substrate layer 102 from the first substrate layer 101, the incident angle b1 is greater than the exit angle b2, that is, the light will diverge in the first concave surface 1011. Therefore, the light in the non-opening area A1 can be refracted into the opening area A2, thereby improving the light efficiency of the display panel.

[0048] It can be understood that in this embodiment, since the refractive index of the third substrate layer 103 is less than that of the second substrate layer 102, according to the formula n1Sinθ1 = n2Sinθ2, when light enters a low-refractive-index film layer from a high-refractive-index film layer, the exit angle increases. Therefore, when light travels from the second substrate layer 102 to the third substrate layer 103, the incident angle d1 is less than the exit angle d2, that is, the light converges within the second concave surface 1021. Therefore, the light efficiency and brightness of the opening area A2 can be improved. If the first concave surface 1011 and the second concave surface 1021 are combined, all the light of the display panel can be utilized, and the overall light efficiency of the display panel can be improved.

[0049] In one embodiment, the first substrate layer 101 is a silicon oxide layer, the second substrate layer 102 is a silicon nitride layer, and the third substrate layer 103 is a glass substrate; wherein, a barrier layer 30 is provided between the glass substrate and the active layer 40, and the light-shielding layer 20 is located on one surface of the glass substrate close to the active layer 40.

[0050] It can be understood that since the glass substrate is located on the silicon nitride layer, after the light is diverged by the first concave surface 1011 and then passes through the thick glass substrate, the light has enough distance to change the propagation direction before reaching other film layers on the glass substrate, so that more light is refracted into the opening area A2, and the light efficiency is higher. In addition, making the silicon oxide layer and the silicon nitride layer on the back of the glass substrate can also avoid the influence of the surface unevenness of the silicon oxide layer and the silicon nitride layer on the electrical properties of the thin film transistors on the front surface of the glass substrate.

[0051] In this embodiment, the barrier layer 30 includes a first barrier layer 301 and a second barrier layer 302.

[0052] Continue to refer to Figure 1 , in one embodiment, the display panel includes a black matrix layer 200, the black matrix layer 200 is located on the substrate 100, and the black matrix layer 200 completely overlaps with the non-opening area A1.

[0053] It should be noted that the black matrix layer 200 can be located in the array substrate or in the counter substrate of the array substrate. Since the black matrix layer 200 completely overlaps with the non-opening area A1, the first concave surface 1011 is located within the area blocked by the black matrix layer 200, and the second concave surface 1021 is provided in the opening area A2 without the block of the black matrix layer 200.

[0054] Next, please refer to Figure 5, which is a top view of another display panel provided by an embodiment of the present invention. In this embodiment, a plurality of the opening regions A2 are arranged in an array, and the non-opening region A1 includes a first non-opening sub-region A11 and a second non-opening sub-region A12. The first non-opening sub-region A11 is located between two adjacent columns of the opening regions A2, and the second non-opening sub-region A12 is located between two adjacent rows of the opening regions A2. Among them, in the row direction, the difference between the width x1 of the first non-opening sub-region A11 and the maximum width x2 of the first concave surface 1011 located in the first non-opening sub-region A11 is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer. In the column direction, the difference between the width y1 of the second non-opening sub-region A12 and the maximum width y2 of the first concave surface 1011 located in the second non-opening sub-region A12 is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0055] In one embodiment, in a direction perpendicular to the light-emitting side of the display panel, the maximum width x2 of the first concave surface 1011 located in the first non-opening sub-region A11 is less than the maximum width y2 of the first concave surface 1011 located in the second non-opening sub-region A12.

[0056] It should be noted that data lines or power lines are correspondingly arranged between two adjacent columns of the opening regions A2, and the corresponding width is relatively small. Thin-film transistor circuits are correspondingly arranged between two adjacent rows of the opening regions A2, and the corresponding width is relatively large. Therefore, in this embodiment, by setting the maximum width x2 of the first concave surface 1011 located in the first non-opening sub-region A11 to be less than the maximum width y2 of the first concave surface 1011 located in the second non-opening sub-region A12, the width between two adjacent columns of the opening regions A2 can be reduced, and the resolution of the display panel can be improved.

[0057] In one embodiment, the distance z between the orthographic projection of the black matrix layer 200 on the substrate 100 and the edge of the adjacent second concave surface 1021 is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

[0058] Next, please refer to Figures 6a to 6g , which is a schematic diagram of the basic structure of each component in the manufacturing process flow of the display panel provided by an embodiment of the present invention. First, as Figure 6a shown, the second concave surface 1021 is formed on the first substrate layer 101 (i.e., the glass substrate) through process steps such as exposure, development, and etching. The second concave surface 1021 is provided corresponding to the opening region of the display panel. Among them, in the light-emitting side direction of the display panel, the cross-sectional shape of the second concave surface 1021 is preferably arc-shaped, and can also be trapezoidal. The depth of the second concave surface 1021 is 0.2 to 2 micrometers. In a plane perpendicular to the light-emitting side of the display panel, the orthographic projection shape of the second concave surface 1021 is circular or quadrilateral.

[0059] Next, as Figure 6b shown, a second substrate layer 102 (i.e., a silicon nitride film) is deposited on the first substrate layer 101. A first recessed structure 3 will correspondingly be formed at a position on the second substrate layer 102 corresponding to the second concave surface 1021. Then, a photoresist is coated on the second substrate layer 102, and the photoresist is exposed and developed to form a first photoresist layer 1 and a second recessed structure 4 on the upper surface of the first photoresist layer 1. The second recessed structure 4 is located in the non-opening area of the display panel.

[0060] Next, as Figure 6c shown, the Figure 6b components are subjected to a full-surface dry etching, keeping the etching rates of the first photoresist layer 1 and the second substrate layer 102 consistent. Finally, the surface of the second substrate layer 102 corresponding to the opening area becomes flat (i.e., the etching depth reaches below the bottom end of the first recessed structure 3), and a first concave surface 1011 (corresponding to the second recessed structure 4) is formed on the surface of the second substrate layer 102 corresponding to the non-opening area. Among them, in the light-emitting side direction of the display panel, the cross-sectional shape of the first concave surface 1011 is preferably arc-shaped, and can also be trapezoidal. The depth of the first concave surface 1011 is 0.2 to 2 micrometers; in a plane perpendicular to the light-emitting side of the display panel, the orthographic projection shape of the first concave surface 1011 is circular or quadrilateral.

[0061] Next, as Figure 6d shown, a third substrate layer 103 (i.e., a silicon oxide film) is deposited on the second substrate layer 102. A third recessed structure 5 will correspondingly be formed at a position on the third substrate layer 103 corresponding to the first concave surface 1011.

[0062] Next, as Figure 6e shown, a photoresist is coated on the third substrate layer 103 to form a second photoresist layer 2, making the upper surface of the third substrate layer 103 flat.

[0063] Next, as Figure 6f shown, the Figure 6e components are subjected to a full-surface dry etching, keeping the etching rates of the second photoresist layer 2 and the third substrate layer 103 consistent. Finally, the purpose of making the upper surface of the third substrate layer 103 flat is achieved (i.e., the etching depth reaches below the bottom end of the third recessed structure 5), that is, the substrate 100 is formed.

[0064] Next, as Figure 6g shown, other film layers of the array substrate are prepared on the substrate 100, and the preparation method is a conventional technique, which will not be described in detail here.

[0065] It should be noted that Figure 6gOther film layers are prepared on the side of the silicon oxide layer away from the silicon nitride layer. In this embodiment, the silicon oxide layer and the silicon nitride layer can be simultaneously reused as the buffer layer and the barrier layer of the display panel, so the thickness of the display panel will not be increased additionally. In other embodiments, other film layers can also be prepared on the side of the glass substrate away from the silicon nitride layer (such as Figure 4 ). The beneficial effect of this embodiment is that after the light is refracted by the first concave surface 1011 and then passes through the thick glass substrate, there is enough distance for the light to change its propagation direction before reaching other film layers, resulting in higher light efficiency. In addition, the flatness of the glass substrate is good, which can also avoid the influence of the uneven upper surface of the first concave surface 1011 on the electrical properties of the active layer 40.

[0066] Next, please refer to Figure 7 , which is a schematic diagram of the basic structure of the display device provided by the embodiment of the present invention. The display device includes a backlight module 300 and a display panel. The display panel is located on the light-emitting side of the backlight module 300. For the basic structure and manufacturing process of the display panel, please refer to Figures 1 to 6g and related descriptions, which will not be elaborated here. The display device provided by the embodiment of the present invention can be: products or components with display functions such as mobile phones, tablet computers, laptop computers, televisions, digital cameras, and navigators.

[0067] The above has introduced in detail a display panel and a display device provided by the embodiment of the present invention. It should be understood that the exemplary embodiments described herein should only be considered as descriptive, used to help understand the method and its core idea of the present invention, rather than used to limit the present invention.

Claims

1. A display panel, characterized in that, It includes a non-opening area and a plurality of opening areas, the non-opening area is located between adjacent opening areas, the display panel includes a substrate, the substrate is located on a side away from the light-emitting surface of the display panel, and the substrate includes: A first buffer layer; A second buffer layer located on the first buffer layer, a first interface is formed between the second buffer layer and the first buffer layer, and the refractive index of the second buffer layer is greater than that of the first buffer layer; A third buffer layer located on the second buffer layer, a second interface is formed between the third buffer layer and the second buffer layer, and the refractive index of the third buffer layer is less than that of the second buffer layer; Wherein, at least one of the first interface and the second interface forms a first concave surface in the non-opening area, and the concave direction of the first concave surface faces the side with a larger refractive index among the two sides of the first concave surface.

2. The display panel according to claim 1, characterized in that, At least one of the first interface and the second interface forms a second concave surface in the opening area, and the concave direction of the second concave surface faces the side with a smaller refractive index among the two sides of the second concave surface.

3. The display panel according to claim 2, wherein The display panel includes an active layer located in the non-opening area, the active layer is located on the substrate, and the active layer includes a channel region and a source contact region and a drain contact region respectively located on both sides of the channel region; Wherein, the orthographic projection of the channel region on the substrate is located within the first concave surface.

4. The display panel according to claim 3, characterized in that, The display panel includes a light-shielding layer located between the first buffer layer and the active layer; Wherein, the orthographic projection of the channel region on the light-shielding layer is located on the light-shielding layer, and the orthographic projection of the light-shielding layer on the substrate is located within the first concave surface.

5. The display panel according to claim 4, wherein The first buffer layer is a glass substrate, the second buffer layer is a silicon nitride layer, and the third buffer layer is a silicon oxide layer; Wherein, the active layer is located on a surface of the silicon oxide layer away from the silicon nitride layer, and the light-shielding layer is located on a surface of the glass substrate close to the active layer.

6. The display panel according to claim 5, wherein In the light-emitting side direction of the display panel, the thickness of the silicon oxide layer is greater than that of the silicon nitride layer.

7. The display panel according to claim 4, characterized in that, The first buffer layer is a silicon oxide layer, the second buffer layer is a silicon nitride layer, and the third buffer layer is a glass substrate; Wherein, a barrier layer is provided between the glass substrate and the active layer, and the light-shielding layer is located on a surface of the glass substrate close to the active layer.

8. The display panel according to claim 2, wherein In the light-emitting side direction of the display panel, the cross-sectional shapes of the first concave surface and the second concave surface are arc-shaped or trapezoidal.

9. The display panel according to claim 8, wherein In the light-emitting side direction of the display panel, the heights of the first concave surface and the second concave surface are both greater than or equal to 0.2 micrometers and less than or equal to 2 micrometers; in a direction perpendicular to the light-emitting side direction of the display panel, the maximum widths of the first concave surface and the second concave surface are both greater than or equal to 5 micrometers and less than or equal to 20 micrometers.

10. The display panel according to claim 2, wherein The display panel includes a black matrix layer, the black matrix layer is located on the substrate, and the black matrix layer completely overlaps with the non-opening area.

11. The display panel according to claim 10, wherein A plurality of the opening regions are arranged in an array. The non-opening region includes a first non-opening sub-region and a second non-opening sub-region. The first non-opening sub-region is located between two adjacent columns of the opening regions, and the second non-opening sub-region is located between two adjacent rows of the opening regions; Wherein, in the row direction, the difference between the width of the first non-opening sub-region and the maximum width of the first concave surface located in the first non-opening sub-region is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer; in the column direction, the difference between the width of the second non-opening sub-region and the maximum width of the first concave surface located in the second non-opening sub-region is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

12. The display panel according to claim 11, wherein In a direction perpendicular to the light-emitting side of the display panel, the maximum width of the first concave surface located in the first non-opening sub-region is less than the maximum width of the first concave surface located in the second non-opening sub-region.

13. The display panel according to claim 10, wherein The distance between the orthographic projection of the black matrix layer on the substrate and the edge of the adjacent second concave surface is greater than or equal to 0.5 micrometers and less than or equal to 1 micrometer.

14. A display device, characterized in that, It includes a backlight module and a display panel according to any one of claims 1 to 13, and the display panel is located on the light-emitting side of the backlight module.

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