CN107579081B - Display panel and display device - Google Patents
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- CN107579081B CN107579081B CN201710890980.0A CN201710890980A CN107579081B CN 107579081 B CN107579081 B CN 107579081B CN 201710890980 A CN201710890980 A CN 201710890980A CN 107579081 B CN107579081 B CN 107579081B
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Abstract
The invention discloses a display panel and a display device, and belongs to the technical field of display, the display panel and the display device comprise a substrate layer and a first film layer arranged on the substrate layer, wherein the surface of the substrate layer, close to the first film layer, is an upper surface of the substrate layer, the surface of the first film layer, far away from the substrate layer, is an upper surface of the first film layer, the surface of the first film layer, close to the substrate layer, is a lower surface of the first film layer, the upper surface of the first film layer comprises a plurality of first step structures, each first step structure comprises a step surface and a step side surface, the step surface of one first step structure is connected with the step side surface of the adjacent first step structure, the included angle between the plane of the step side surface and the plane of the upper surface of the substrate layer is α, α is more than or equal to 15 degrees and less than or equal.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
A display panel provided in the prior art has a multilayer film structure and a plurality of metal traces. Research personnel find that metal wiring in the display panel is easy to break at the fault of the film layer, so that poor display is caused, and the yield of the display panel is reduced.
Disclosure of Invention
In view of the foregoing, the present invention provides a display panel and a display device.
The invention provides a display panel which comprises a substrate layer and a first film layer arranged on the substrate layer, wherein the surface of one side, close to the first film layer, of the substrate layer is the upper surface of the substrate layer, the surface, far away from the substrate layer, of the first film layer is the upper surface of the first film layer, the surface, close to the substrate layer, of the first film layer is the lower surface of the first film layer, the upper surface of the first film layer comprises a plurality of first step structures, each first step structure comprises a step surface and a step side surface, orthographic projections of the step surface and the step side surface on the upper surface of the substrate layer are not overlapped, the step surface of one first step structure is connected with the step side surface of the adjacent first step structure, the included angle between the plane of the step side surface and the plane of the upper surface of the substrate layer is α.
In some alternative embodiments, 20 ≦ α ≦ 30.
In some alternative embodiments, the first membrane layer is an inorganic layer.
In some alternative embodiments, the first film layer has a thickness d ≧ 0.8 μm.
In some alternative embodiments, the display panel includes a display area and a peripheral non-display area; the non-display area comprises a wiring fan-out area and a bending area, and the wiring fan-out area is positioned between the display area and the bending area; the plurality of first step structures are arranged on one side, close to the routing fan-out area, of the bending area; the display panel comprises a substrate layer, a buffer layer, a semiconductor layer, a grid electrode insulating layer, a first metal layer, a first insulating layer, a second metal layer, a second insulating layer and a third metal layer which are sequentially arranged; at least one of the buffer layer, the gate insulating layer, the first insulating layer and the second insulating layer is a first film layer.
In some alternative embodiments, the step plane is parallel to the top surface of the substrate layer.
In some alternative embodiments, the step face of one first step structure intersects with the step side face to form a first intersection line, and the step face of one first step structure intersects with the step side face of the adjacent first step structure to form a second intersection line;
the first intersection line and the second intersection line corresponding to the same step surface have a relationship that the distance between the first intersection line and the upper surface of the substrate layer is smaller than the distance between the second intersection line and the upper surface of the substrate layer.
In some alternative embodiments, plurality α are not identical in the plurality of first step structures.
In some alternative embodiments, the α corresponding to the first step structure adjacent to the upper surface of the first film layer is α 1, the α corresponding to the first step structure adjacent to the upper surface of the substrate layer is α 2, and α 1 and α 2 of the plurality of first step structures are all smaller than α of the remaining first step structures.
In some alternative embodiments, the first membrane layer further comprises a second stepped structure; the first film layer comprises a first film layer section, and the first film layer section is connected with the upper surface of the first film layer and the lower surface of the first film layer; the second step structure comprises a first film layer upper surface and a first film layer cross section; along the extending direction of the cross section of the first film layer, a plurality of first step structures and second step structures are alternately arranged.
In some optional embodiments, the display panel includes a plurality of metal traces, the metal traces cover the first step structures, and the metal traces extend along an arrangement direction of the plurality of first step structures.
The invention also provides a display device which comprises the display panel provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
in the display panel and the display device provided by the invention, the plurality of first step structures are arranged on the upper surface of the first film layer, each first step structure comprises a step surface and a step side surface, the included angle between the plane of the step side surface and the plane of the upper surface of the substrate layer is α, and is more than or equal to 15 degrees and less than or equal to α degrees and less than or equal to 35 degrees.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic cross-sectional view of a display panel provided in the prior art;
fig. 2 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view illustrating a display panel according to another embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view illustrating another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of the display panel provided in FIG. 7;
fig. 9 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a display panel provided in the prior art, the display panel shown in fig. 1 includes a first film layer 01 and a second film layer 02 stacked, due to design requirements of the display panel, in an area a, the second film layer 02 is etched away, the display panel further includes a metal trace 03, the metal trace 03 is used for transmitting an electrical signal, the metal trace 03 extends from a surface of the first film layer 01 to a surface of the second film layer 02 through a second film layer cross-section 021, and research and development staff find that, due to the thicker thickness of the second film layer 02 and the larger angle β between the second film layer cross-section 021 and the first film layer 01, and β is in a range of 60 ° to 80 °, the metal trace 03 is easily broken at the second film layer cross-section 021, causing an open circuit, thereby reducing yield of the display panel.
Referring to fig. 2, fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention, which includes a substrate layer 00, a first film layer 10 disposed on the substrate layer 00, a side surface of the substrate layer 00 close to the first film layer 10 is a substrate layer upper surface 001, a surface of the first film layer 10 away from the substrate layer 00 is a first film layer upper surface 11, a surface of the first film layer 10 close to the substrate layer 00 is a first film layer lower surface 12, the first film layer upper surface 11 includes a plurality of first step structures 20, the first step structures 20 include step surfaces 21 and step side surfaces 22, orthographic projections of the step surfaces 21 and the step side surfaces 22 on the substrate layer 001 do not overlap, when the plurality of first step structures 20 are disposed consecutively, the step surface 21 of one first step structure 20 is connected with the step side surface 22 of the adjacent first step structure 20, and a plane of the step side surface 22 is at an angle of α, 15 degrees or more than α degrees.
In the display panel shown in fig. 2, the substrate layer 00 may be an organic layer, an inorganic layer, or a substrate in the display surface, and in this embodiment, specific materials and functions of the substrate layer 00 are not particularly limited. The first film layer 10 may be an organic layer or an inorganic layer in the display surface, and the present embodiment does not specifically limit the specific material and function of the first film layer 10.
The first film upper surface 11 includes a plurality of first step structures 20, in other words, the first film upper surface 11 is not a plane, and the first film upper surface 11 includes a plurality of bent structures, and the bent structures are shaped like steps, i.e., the first step structures 20. The first step structure 20 comprises a step face 21 and a step side face 22, and orthographic projections of the step face 21 and the step side face 22 on the substrate layer upper surface 001 do not overlap. The step face 21 of one first step structure 20 meets the step side face 22 of the first step structure 20 adjacent thereto. In other words, the plurality of first step structures 20 are adjacently disposed.
It can be understood that, the smaller the included angle α between the plane of the step side 22 and the plane of the substrate layer upper surface 001 is, the gentler the step side 22 is, the larger the included angle α between the plane of the step side 22 and the plane of the substrate layer upper surface 001 is, the steeper the step side 22 is, in the embodiment of the present invention, the included angle between the plane of the step side 22 and the plane of the substrate layer upper surface 001 is α, 15 degrees is equal to or less than α degrees is equal to or less than 35 degrees, so that the step side 22 extends more smoothly, when α is less than 15 degrees, the width L of the area where the plurality of first step structures 20 are located is too large, which may affect the structural design of the display panel, and at the same time, greatly increases the manufacturing difficulty of the first step structures.
In the display panel provided by the embodiment of the invention, the plurality of first step structures are arranged on the upper surface of the first film layer, each first step structure comprises a step surface and a step side surface, the included angle between the plane of the step side surface and the plane of the upper surface of the substrate layer is α, and α is more than or equal to 15 degrees and less than or equal to 35 degrees.
Optionally, in the process of manufacturing the display panel provided by the embodiment of the present invention, a Halftone Mask (Halftone Mask) may be used to fabricate a plurality of first step structures on the first film, and with the use of the Halftone Mask technology, an angle between a plane where the step side surfaces of the first step structures are located and a plane where the upper surface of the substrate layer is located may be smaller, and may be greater than or equal to 15 degrees and less than or equal to α degrees and less than or equal to 35 degrees.
In some alternative embodiments, please continue to refer to fig. 2, where 20 ° ≦ α ≦ 30 °, in the display panel provided in this embodiment, 20 ° ≦ α ≦ 30 ° is further provided, it can be understood that when α is too small, the width L of the area where the plurality of first step structures 20 are located is larger, which may affect the arrangement of other film structures in the display panel.
In some alternative embodiments, the display panel provided in the embodiments of the present invention, the first film layer is an inorganic layer. The inorganic layer has better insulating property, so the trace is usually disposed on the surface of the inorganic layer. For example, the material of the first film layer may include silicon nitride, or silicon oxide, or a composite material of silicon nitride and silicon oxide.
In some alternative embodiments, please continue to refer to FIG. 2, the thickness of the first film 10 is d, and d ≧ 0.8 μm. When the routing extends from one film layer to the first film layer 10, the greater the thickness d of the first film layer 10 is, the more easily the routing is broken; conversely, the smaller the thickness d of the first film layer 10, the less likely the trace will break. When the thickness d of the first film layer 10 is greater than or equal to 0.8 μm, the risk of breaking the wires is high, and at this time, the plurality of first step structures 20 are arranged on the upper surface 11 of the first film layer, so that the wires can be effectively prevented from breaking, and the yield of the display panel is improved.
In some optional embodiments, please refer to fig. 3, fig. 3 is a schematic cross-sectional structure diagram of another display panel provided in the embodiments of the present invention. Fig. 3 follows the reference numerals of fig. 2. On the basis of the display panel provided by any embodiment of the invention, the step surface 21 is parallel to the upper surface 001 of the substrate layer. Optionally, with reference to fig. 3, on the basis of the display panel provided in any embodiment of the present invention, the display panel includes a plurality of metal traces 30, the metal traces 30 cover the first step structures 20, and the metal traces extend along the arrangement direction of the plurality of first step structures 20. Generally, in order to increase the aperture ratio of the display panel and reduce the resistance of the metal traces 30, the metal traces 30 are thinner, and thus are prone to be broken. In the display panel provided by this embodiment, the plurality of first step structures 20 are provided, so that the metal traces 30 can be effectively prevented from being broken, and the yield of the display panel is improved.
In some alternative embodiments, please refer to fig. 4, fig. 4 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention, fig. 4 uses the reference numeral of fig. 2, in the display panel shown in fig. 4, a plurality of α in the plurality of first step structures 20 are not completely the same, fig. 4 only illustrates that the number of the first step structures 20 is 5, and in 5 first step structures 20, α, α, α, α, and α respectively include, in other words, at least one of α, α, α, α, and α has an angle different from the remaining angles.
In some alternative embodiments, with continued reference to fig. 4, of the plurality of first stepped structures 20, α corresponding to the first stepped structure 20 adjacent to the first film layer upper surface 11 is α, α corresponding to the first stepped structure 20 adjacent to the substrate layer upper surface 001 is α, α and α are both smaller than α of the remaining first stepped structures, when the metal trace 30 extends from the substrate layer 00 through the plurality of first stepped structures 20, the angle of α and α is set to be smaller, further facilitating the extension of the metal trace 30, making the metal trace 30 less prone to break, when the width L of the region where the plurality of steps are located is not increased, making the metal trace 30 extend from the substrate layer 00 through the plurality of first stepped structures 20, and when the first stepped structure 20 extends to the flatter region of the first film layer upper surface 11, there may be a relatively gradual transition, further making the trace 30 less prone to break, for example, α may be set to α, and then gradually decrease the angle of the first stepped structure 20 from the first stepped structure 20 to the flatter region 385.
In some optional embodiments, please refer to fig. 5, and fig. 5 is a schematic cross-sectional structure diagram of another display panel provided in the embodiments of the present invention. On the basis of the display panel provided in any embodiment of the present invention, the step surface 21A of one first step structure 20 intersects with the step side surface 22A to form a first intersection line S1, and the step surface 21 of one first step structure 20 intersects with the step side surface 22 of the adjacent first step structure 20 to form a second intersection line S2, it can be understood that the extending direction of the first intersection line S1 and the second intersection line S2 shown in fig. 5 may be perpendicular to the paper surface. The first intersection S1 and the second intersection S2 corresponding to the same step face 21A have the following relationship: the distance D1 of the first intersection S1 from the top surface 001 of the substrate layer is less than the distance D2 of the second intersection S2 from the top surface 001 of the substrate layer. In the display panel provided by this embodiment, step face 21 and substrate layer upper surface 11 are not parallel, step face 21 is the slope setting, and to the plane of substrate layer upper surface 11 place, step face 21 and step side 22 have the same slope trend, when the surface of first stair structure 20 sets up metal routing 30, step face 21 and step side 22 can play the effect of mild transition to the extension of metal routing 30 simultaneously, can make metal routing 30 in the mild transition between a plurality of first stair structures 20, further make metal routing 30 be difficult for breaking.
In some optional embodiments, please refer to fig. 6, and fig. 6 is a schematic cross-sectional structure diagram of another display panel provided in the embodiments of the present invention. On the basis of the display panel provided in any embodiment of the present invention, the first film layer 10 further includes a second step structure 40; the first film 10 includes a first film cross-section 13, the first film cross-section 13 connecting the first film upper surface 11 and the first film lower surface 12; the second step structure 40 includes a first film layer upper surface 11 and a first film layer cross-section 13; along the extending direction x of the first film layer section 13, a plurality of first step structures 20 and second step structures 40 are alternately arranged. For clearly illustrating the technical solution of the present embodiment, fig. 6 illustrates a schematic perspective structure of the display panel, and the first film layer 10 is not provided with a filling pattern, wherein a cross section 13 of one first film layer is provided with a grid-shaped filling pattern. In the display panel that this embodiment provided, when being provided with metal routing 30, metal routing 30 extends along the surface of a plurality of first stair structure 20, a plurality of first stair structure 20 and second stair structure 40 set up in turn, second stair structure 40 can play the effect of wall, two adjacent metal routing 30 are cut off by second stair structure 40, can prevent at the in-process of manufacturing display panel, because the condition of the two adjacent metal routing 30 continuous short circuit that technological error appears, improve display panel's manufacturing yield.
In some optional embodiments, please refer to fig. 7, and fig. 7 is a schematic plan view illustrating a display panel according to another embodiment of the present invention. On the basis of the display panel provided by any embodiment of the invention, the display panel comprises a display area AA and a peripheral non-display area BB; the non-display area BB comprises a routing fan-out area BB1 and a bending area BB2, and the routing fan-out area BB1 is located between the display area AA and the bending area BB 2; the plurality of first step structures 20 are disposed in the bending region BB2 on a side close to the track fan-out region BB 1. The display area AA is used for realizing a display function of the display panel, and for example, the display area AA may include a plurality of pixels. The trace fan-out area BB1 includes a plurality of traces for transmitting electrical signals, and the plurality of traces have a plurality of extending directions in the fan-out area BB 1. The display panel can be bent at the bending area BB 2. Referring to fig. 8, fig. 8 is a schematic cross-sectional view of the display panel provided in fig. 7. The display panel comprises a substrate layer 00, a buffer layer 50, a semiconductor layer 51, a gate insulating layer 52, a first metal layer 53, a first insulating layer 54, a second metal layer 55, a second insulating layer 56 and a third metal layer 57 which are sequentially arranged, and further comprises a plurality of thin film transistors, wherein each thin film transistor comprises an active layer, a gate, a source and a drain, the active layer can be formed through the semiconductor layer 51, the gate can be formed through the first metal layer 53, the source and the drain can be formed through the third metal layer 57, the source and the drain can be connected with the active layer through a through hole, and the second metal layer 55 can be used for forming one electrode of a capacitor; at least one of the buffer layer 50, the gate insulating layer 52, the first insulating layer 54 and the second insulating layer 56 is a first film layer. The display panel provided by the embodiment comprises a plurality of film layer structures. Any one of the buffer layer 50, the gate insulating layer 52, the first insulating layer 54, and the second insulating layer 56 may include a plurality of first step structures. Optionally, in the bending region BB2, in order to make the display panel thinner and easier to bend, part of the film layer in the display panel is usually etched away in the bending region BB2, for example, the second insulating layer 56 is usually removed in the bending region BB2, when a plurality of traces extend from the fan-out region BB1 to the bending region BB2, the second insulating layer 56 has a step, and a plurality of first step structures are disposed in the second insulating layer 56, so that the plurality of traces are not easy to break.
The invention also provides a display device which comprises the display panel provided by the invention. Referring to fig. 9, fig. 9 is a schematic view of a display device according to an embodiment of the invention. Fig. 9 provides a display device 1000 including the display panel 100 according to any of the above embodiments of the present invention. The embodiment of fig. 9 only takes a mobile phone as an example to describe the display device 1000, and it should be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
According to the embodiment, the display panel and the display device provided by the invention at least achieve the following beneficial effects:
in the display panel provided by the embodiment of the invention, the plurality of first step structures are arranged on the upper surface of the first film layer, each first step structure comprises a step surface and a step side surface, the included angle between the plane of the step side surface and the plane of the upper surface of the substrate layer is α, and α is more than or equal to 15 degrees and less than or equal to 35 degrees.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A display panel, comprising:
a substrate layer;
a first film layer disposed on the substrate layer; the surface of one side, close to the first film layer, of the substrate layer is the upper surface of the substrate layer; the surface of the first film layer, which is far away from the substrate layer, is the upper surface of the first film layer, and the surface of the first film layer, which is close to the substrate layer, is the lower surface of the first film layer;
the upper surface of the first film layer comprises a plurality of first step structures;
the first step structure comprises a step surface and a step side surface, and orthographic projections of the step surface and the step side surface on the upper surface of the substrate layer are not overlapped;
the step surface of one first step structure is connected with the step side surface of the adjacent first step structure;
the included angle between the plane of the side surface of the step and the plane of the upper surface of the substrate layer is α, and α is more than or equal to 15 degrees and less than or equal to 35 degrees;
the first membrane layer further comprises a second step structure;
the first film layer comprises a first film layer cross section connecting the first film layer upper surface and the first film layer lower surface; the second step structure comprises the first film layer upper surface and the first film layer cross section;
the plurality of first step structures and the plurality of second step structures are alternately arranged along the extension direction of the section of the first film layer;
the display panel comprises a plurality of metal wires, the metal wires cover the first step structures, and the metal wires extend along the arrangement direction of the first step structures.
2. The display panel according to claim 1,
20°≤α≤30°。
3. the display panel according to claim 1,
the first film layer is an inorganic layer.
4. The display panel according to claim 1,
the thickness of the first film layer is d, and d is more than or equal to 0.8 mu m.
5. The display panel according to claim 1,
the display panel comprises a display area and a peripheral non-display area;
the non-display area comprises a wiring fan-out area and a bending area, and the wiring fan-out area is positioned between the display area and the bending area;
the plurality of first step structures are arranged on one side, close to the routing fan-out area, of the bending area;
the display panel comprises the substrate layer, the buffer layer, the semiconductor layer, the grid electrode insulating layer, the first metal layer, the first insulating layer, the second metal layer, the second insulating layer and the third metal layer which are sequentially arranged;
at least one of the buffer layer, the gate insulating layer, the first insulating layer, and the second insulating layer is the first film layer.
6. The display panel according to claim 1,
the step surface is parallel to the upper surface of the substrate layer.
7. The display panel according to claim 1,
the step surface of one first step structure is intersected with the step side surface to form a first intersection line, and the step surface of one first step structure is intersected with the step side surface of the adjacent first step structure to form a second intersection line;
the first intersecting line and the second intersecting line corresponding to the same step surface have the following relationship: the distance between the first intersection line and the upper surface of the substrate layer is smaller than the distance between the second intersection line and the upper surface of the substrate layer.
8. The display panel according to claim 1,
in the plurality of first step structures, a plurality of the α are not identical.
9. The display panel according to claim 8,
in the plurality of first step structures, the α corresponding to the first step structure adjacent to the upper surface of the first film layer is α 1, the α corresponding to the first step structure adjacent to the upper surface of the substrate layer is α 2, and the α 1 and the α 2 are both smaller than the α of the rest of the first step structures.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN109614005A (en) * | 2018-11-30 | 2019-04-12 | 武汉华星光电技术有限公司 | Touch-control display panel and touch control display apparatus |
| CN109728043A (en) * | 2018-12-29 | 2019-05-07 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN110197831B (en) * | 2019-06-19 | 2021-09-10 | 京东方科技集团股份有限公司 | Array substrate, manufacturing method thereof and display panel |
| CN110246885B (en) * | 2019-06-28 | 2021-10-01 | 上海天马有机发光显示技术有限公司 | Display panel |
| CN111180467A (en) * | 2020-01-06 | 2020-05-19 | 昆山国显光电有限公司 | Array substrate, display panel and manufacturing method of array substrate |
| CN111244117B (en) * | 2020-04-24 | 2020-07-28 | 京东方科技集团股份有限公司 | Array substrate, manufacturing method thereof and display device |
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| CN105355630A (en) * | 2015-10-10 | 2016-02-24 | 深圳市华星光电技术有限公司 | Array substrate and liquid crystal display including same |
| CN106873267A (en) * | 2015-12-14 | 2017-06-20 | 群创光电股份有限公司 | Display panel |
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