CN112837616A - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
- Publication number
- CN112837616A CN112837616A CN202110007505.0A CN202110007505A CN112837616A CN 112837616 A CN112837616 A CN 112837616A CN 202110007505 A CN202110007505 A CN 202110007505A CN 112837616 A CN112837616 A CN 112837616A
- Authority
- CN
- China
- Prior art keywords
- line
- detection line
- substrate
- dam
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
Abstract
The invention provides a display panel, a manufacturing method thereof and a display device. The display panel includes: a substrate including a non-display region; a crack detecting line including a first detecting line and a second detecting line disposed in the non-display area, the first detecting line being electrically connected to the second detecting line; the resistivity of the second sensing wire is less than the resistivity of the first sensing wire. Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
In the manufacturing process of the display panel, in order to manufacture the display panel in a predetermined size, after the driving transistor layer and the display light emitting layer are manufactured in the panel segment process, a cutting line is formed in the non-display region and the display panel is cut along the cutting line. The non-display area of the display panel may have circuit film cracks due to cutting, thereby causing signal line breakage or micro-breakage, and easily causing abnormal screen body function. In the current PCD (Panel Crack Detect) technology, an externally input current is received through a Crack detection line, and a light emitting pixel cell of a display area connected to the Crack detection line displays a slightly bright line on a display Panel at the time of a Crack test. And defective products of the display panel with cracks can be removed in time according to the crack detection result, so that the defect of the whole product of the display device caused by the subsequent process is avoided.
However, the existing crack detection lines are prone to burn.
Disclosure of Invention
Therefore, the invention provides a display panel, a manufacturing method thereof and a display device, which aim to solve the problem that a crack detection line is easy to burn.
The present invention provides a display panel including: a substrate including a non-display region; a crack detecting line including a first detecting line and a second detecting line disposed in the non-display area, the first detecting line being electrically connected to the second detecting line; the resistivity of the second sensing wire is less than the resistivity of the first sensing wire.
Optionally, the first inspection line and the second inspection line are located in different layers, and preferably, the distance from the second inspection line to the substrate is greater than the distance from the first inspection line to the substrate; or the first detection line and the second detection line are arranged in the same layer.
Optionally, the first sensing line includes a first portion and a second portion spaced apart from each other, and the second sensing line is located between and electrically connected to the first portion and the second portion, respectively.
Optionally, the material of the first detection line includes molybdenum, the second detection line includes a first sub-line film, a second sub-line film, and a third sub-line film, which are stacked, the material of the first sub-line film includes titanium, the material of the second sub-line film includes aluminum, and the material of the third sub-line film includes titanium.
Optionally, the substrate further includes a display area, and the non-display area surrounds the display area; the crack detection line surrounds the display area; the display panel further includes: a dam structure on the non-display area and surrounding the display area.
Optionally, the second inspection line is located at the bottom of the dam structure.
Optionally, the distance from the second inspection line to the substrate is greater than the distance from the first inspection line to the substrate; the first detection line comprises a first detection line body and a bridging line connected with the first detection line body, the first detection line body is located on the outer side of the dam-shaped structure, the bridging line extends to the bottom of the dam-shaped structure from one end of the first detection line body, and the bridging line is electrically connected with the second detection line.
Optionally, the width of the dam structure is 20 μm to 40 μm larger than the width of the second detection line.
Optionally, the dam structure is a multilayer structure.
Optionally, the second detection line is located outside a corner of the display area.
Optionally, the display panel further includes: the first dielectric layer covers the first detection line, and the second detection line is positioned on the part of the surface of the first dielectric layer, which faces away from the substrate; the dam structure is located on a part of the first medium layer and covers the second detection line.
Optionally, the dam structure is located between the crack detection line and the display area; the display panel further includes: a protective structure covering the crack detection line.
Optionally, the protective structure is an inorganic material.
Optionally, the protective structure is a multilayer structure.
The invention also provides a manufacturing method of the display panel, which comprises the following steps: providing a substrate, wherein the substrate comprises a non-display area; forming a crack detecting line on a non-display region of the substrate, the forming of the crack detecting line including: forming a first detection line on a non-display region of the substrate; and forming a second detection line on the non-display area of the substrate, wherein the second detection line is electrically connected with the first detection line, and the resistivity of the second detection line is smaller than that of the first detection line.
Optionally, after forming the first sensing line, forming a second sensing line.
Optionally, the step of forming the first detection line includes: forming an initial first detection line, and etching the initial first detection line to enable the initial first detection line to form a first part and a second part which are separated; after forming the second sensing line, the second sensing line is positioned between and electrically connected to the first portion and the second portion, respectively; the first detection line and the second detection line are arranged on the same layer, or the first detection line and the second detection line are located on different layers.
Optionally, the substrate further includes a display area, and the non-display area surrounds the display area; the crack detection line surrounds the display area; the manufacturing method of the display panel further includes: after the crack detection lines are formed, a dam structure surrounding the display area is formed on the non-display area of the substrate.
Optionally, a distance from the second inspection line to the substrate is greater than a distance from the first inspection line to the substrate, and the dam structure covers the second inspection line.
Optionally, the method for manufacturing the display panel further includes: forming a first dielectric layer on the substrate after forming the first sensing line and before forming the second sensing line, the first dielectric layer covering the first sensing line; after the second detection line and the dam structure are formed, the second detection line is positioned on the part, facing away from the substrate, of the surface of the first medium layer; the dam structure is located on a part of the first medium layer and covers the second detection line.
Optionally, the step of forming the dam structure comprises: forming a first layer of dam film on the non-display area, the first layer of dam film covering the second inspection line; the manufacturing method of the display panel further includes: after the first dam film is formed, a conductive line is formed on a display region of the substrate.
Optionally, the step of forming the dam structure further comprises: after the first-layer dam film is formed, second-to nth-layer dam films are formed on the first-layer dam film, N being an integer greater than or equal to 2.
Optionally, forming the conductive line after forming the first layer of dam film and before forming the second layer of dam film; alternatively, the conductive line is formed after the dam structure is formed.
Optionally, the method for manufacturing the display panel further includes: after the conductive lines are formed, forming a thin film encapsulation layer on the substrate; and after the thin film packaging layer is formed, carrying out reliability test on temperature and humidity.
The invention also provides a display device comprising the display panel.
The technical scheme provided by the invention has the following advantages:
1. the present invention provides a display panel including: a substrate including a non-display region; a crack detecting line including a first detecting line and a second detecting line disposed in the non-display area, the first detecting line being electrically connected to the second detecting line; the resistivity of the second sensing wire is less than the resistivity of the first sensing wire. The resistivity of the first detection line is relatively large, the first detection line is easy to accumulate static electricity, after a certain amount of static electricity is accumulated in the first detection line, the static electricity accumulated in the first detection line can be released instantly, and especially in a high-temperature process and a drying process, the static electricity accumulated in the first detection line can be promoted to be released instantly. Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
2. Further, the first detection line and the second detection line are located in different layers, so that the preparation processes of the first detection line and the second detection line are not affected by each other.
3. The first sensing line includes first and second spaced portions, and the second sensing line is positioned between and electrically connected to the first and second portions, respectively. Because the first detection line comprises two parts, the length of the first part and the length of the second part are both smaller, so that the capacity of the first part for accumulating static electricity is reduced, the capacity of the second part for accumulating static electricity is reduced, the static electricity accumulated in the first part can be timely conducted away, and the static electricity accumulated in the second part can be timely conducted away. Therefore, static electricity released by the first detection line in the static electricity instant releasing process is reduced, the first detection line is further prevented from being burnt, and the crack detection line is prevented from being burnt.
4. Further, the substrate further comprises a display area, and the non-display area surrounds the display area; the crack detection line surrounds the display area; the display panel further includes: a dam structure on the non-display area and surrounding the display area. The dam structure is used for preventing organic substances in the display area from overflowing to a non-display area of the display panel in the preparation process.
5. Further, the second inspection line is located at the bottom of the dam structure. Through setting up the second detection line under dam-shaped structure, dam-shaped structure can protect the second detection line, avoids the second detection line to be corroded by the side direction sculpture and takes place the phenomenon that the partial region of second detection line collapses, and then avoids the second detection line to be corroded and take place the broken string in the reliability test of follow-up temperature and humidity, avoids the crackle detection line to appear the erroneous judgement in the crackle detection process. In addition, the design space can be saved, a protection structure of a crack detection line does not need to be arranged independently, and the light and thin display panel is facilitated.
6. According to the manufacturing method of the display panel, provided by the technical scheme of the invention, a first detection line is formed on a non-display area of the substrate; and forming a second detection line on the non-display area of the substrate, wherein the second detection line is electrically connected with the first detection line, and the resistivity of the second detection line is smaller than that of the first detection line. Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
7. Further, the substrate further comprises a display area, and the non-display area surrounds the display area; the crack detection line surrounds the display area; the manufacturing method of the display panel further includes: forming a dam structure surrounding the display area on a non-display area of the substrate after forming the crack detection line; the distance from the second detection line to the substrate is greater than the distance from the first detection line to the substrate, and the dam structure covers the second detection line. The dam-shaped structure can protect the second detection line, the phenomenon that the second detection line is laterally etched and the partial area of the second detection line collapses is avoided, the second detection line is further prevented from being corroded and broken in subsequent reliability tests of temperature and humidity, and misjudgment of the crack detection line in the crack detection process is avoided. In addition, the design space can be saved, a protection structure of a crack detection line does not need to be arranged independently, and the light and thin display panel is facilitated.
8. Further, the step of forming the dam structure includes: forming a first layer of dam film on the non-display area, the first layer of dam film covering the second inspection line; the manufacturing method of the display panel further includes: forming a conductive line on a display area of the substrate after forming the first layer of the dam film; after the conductive lines are formed, forming a thin film encapsulation layer on the substrate; and after the thin film packaging layer is formed, carrying out reliability test on temperature and humidity. Because first layer of dammed membrane covers the second detection line, first layer of dammed membrane protection the second detection line is not by the technology side etching that forms the conductor wire, the stable in structure of second detection line, at the in-process that forms the film packaging layer, the second detection line can not collapse, the film packaging layer can be to the better encapsulation of rete on the base plate, can not form the hole between film packaging layer and the rete by the encapsulation, consequently in carrying out the reliability test of temperature and humidity, avoid the second detection line to receive the environmental impact of the reliability test of temperature and humidity and corroded, avoid the second detection line to break the line in the reliability test of temperature and humidity. Due to the fact that the second detection line is prevented from being broken in the reliability test of temperature and humidity, the accuracy of crack detection of the crack detection line is guaranteed.
10. The display device provided by the invention comprises the display panel. Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view taken at A in FIG. 1;
FIG. 3 is a schematic diagram of a display panel according to another embodiment of the present invention;
fig. 4 is a schematic cross-sectional view taken along the dotted line at a' in fig. 3.
Detailed Description
An embodiment of the present invention provides a display panel, including: a substrate including a non-display region; a crack detecting line including a first detecting line and a second detecting line disposed in the non-display area, the first detecting line being electrically connected to the second detecting line; the resistivity of the second sensing wire is less than the resistivity of the first sensing wire.
The resistivity of the first detection line is relatively large, the first detection line is easy to accumulate static electricity, after a certain amount of static electricity is accumulated in the first detection line, the static electricity accumulated in the first detection line can be released instantly, and especially in a high-temperature process and a drying process, the static electricity accumulated in the first detection line can be promoted to be released instantly. Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a display panel, and reference is made to fig. 1 and fig. 2 in combination. The display panel includes: a substrate 100, the substrate 100 including a non-display region 1002; a crack detecting line including a first detecting line L1 and a second detecting line L2 disposed in the non-display region 1002, the first detecting line L1 being electrically connected to the second detecting line L2; the resistivity of the second sensing wire L2 is smaller than the resistivity of the first sensing wire L1.
In this embodiment, owing to set up second detection line L2, the resistivity of second detection line L2 is less than the resistivity of first detection line L1 for the bulk resistance of crack detection line reduces, and at the in-process of charge release, the resistance of the whole route that the electric charge need flow through reduces, makes the easier follow crack detection line of electric charge release, avoids first detection line L1 burn, avoids crack detection line burn.
In this embodiment, combine first detection line L1 and second detection line L1 to constitute the crack detection line, avoid the resistance undersize of crack detection line, the ability that the crack detection line can bear the voltage is higher, avoids the electric current in the crack detection line too big to lead to the crack detection line to burn out the short circuit. The substrate 100 includes a transparent flexible substrate, or other substrates may be selected for the substrate 100. The substrate 100 may further have an array circuit layer therein.
In this embodiment, the first detection line L1 and the second detection line L2 are located at different layers, so that the preparation processes of the first detection line L1 and the second detection line L2 are not affected by each other. In a specific embodiment, the distance from the second sensing line L2 to the substrate 100 is greater than the distance from the first sensing line L1 to the substrate 100. That is, the second detection line L2 is positioned at an upper layer of the first detection line L1.
The resistivity of the second sensing wire L2 is less than that of the first sensing wire L1, and the material of the second sensing wire L2 is different from that of the first sensing wire L1.
In this embodiment, the material of the first detection line L1 includes molybdenum, and the material of the first detection line L1 adopts molybdenum, so that the whole preparation process of the first detection line L1 is mature and stable, and the corrosion resistance of the first detection line L1 is good.
In this embodiment, the second detection line L2 includes a first sub-line film (not shown) made of titanium, a second sub-line film (not shown) made of aluminum, and a third sub-line film (not shown) made of titanium, which are stacked. The lamination direction of the first, second, and third sub-line films is perpendicular to the surface of the substrate 100.
In the present embodiment, the first sensing line L1 includes a first portion L11 and a second portion L12 spaced apart from each other, and the second sensing line L2 is located between the first portion L11 and the second portion L12 and electrically connected to the first portion L11 and the second portion L12, respectively. Since the first detection line L1 includes two parts, the length of the first part L11 and the length of the second part L12 are both small, so that the capacity of the first part L11 for accumulating static electricity is reduced, the capacity of the second part L12 for accumulating static electricity is reduced, the static electricity accumulated in the first part L11 is timely conducted away, and the static electricity accumulated in the second part L12 is timely conducted away. Therefore, static electricity released by the first detection line L1 in the static electricity instant releasing process is reduced, and further burning of the first detection line L1 and burning of a crack detection line are avoided.
In other embodiments, the first sensing line is a unitary structure.
In other embodiments, the first detection line and the second detection line are disposed in the same layer.
In this embodiment, the substrate 100 further includes a display area 1001, and the non-display area 1002 surrounds the display area 1001; the crack detection line surrounds the display area 1001; the display panel further includes: a dam structure 300 on the non-display area 1002 and surrounding the display area 1001. The second sensing line L2 is located at the bottom of the dam structure 300.
The dam structure 300 is used to prevent organic substances located in the display region 1001 from overflowing to the non-display region 1002 of the display panel during the manufacturing process.
In this embodiment, the second detection line L2 is disposed under the dam structure 300, and the dam structure can protect the second detection line L2, so as to prevent the second detection line L2 from being laterally etched and causing the collapse of a partial region of the second detection line L2, thereby preventing the second detection line L2 from being corroded and broken in subsequent reliability tests of temperature and humidity, and preventing the crack detection line from being misjudged in the crack detection process. In addition, the design space can be saved, a protection structure of a crack detection line does not need to be arranged independently, and the light and thin display panel is facilitated.
In this embodiment, the display panel further includes: a first medium layer 200, wherein the first medium layer 200 covers the first inspection line L1, and the second inspection line L2 is located on a part of the surface of the first medium layer 200 facing away from the substrate 100; the dam structure 300 is positioned on a portion of the first medium layer 200 and covers the second sensing line L2.
In this embodiment, the distance from the second sensing line L2 to the substrate 100 is greater than the distance from the first sensing line L1 to the substrate 100; the first sensing line L1 includes a first sensing line body located at an outer side of the dam structure 300 and a bridge line connected to the first sensing line body, the bridge line extending from one end of the first sensing line body to a bottom of the dam structure 300, the bridge line being electrically connected to the second sensing line L2. Specifically, the bridge lines are electrically connected to the second sensing lines L2 through conductive plugs located in the first dielectric layer 200.
In this embodiment, since the first sensing lines L1 include the first and second portions L11 and L12 that are spaced apart from each other, the first portion L11 includes a first sub sensing line body L111 and a first sub bridge line L112 connected to the first sub sensing line body L111, the first sub bridge line L112 extends from one end of the first sub sensing line body L111 to the bottom of the dam structure 300, the second portion L12 includes a second sub sensing line body L114 and a second sub bridge line L113 connected to the second sub sensing line body L114, the second sub bridge line L113 extends from one end of the second sub sensing line body L114 to the bottom of the dam structure 300, and the first and second sub bridge lines L112 and L113 are electrically connected to the second sub sensing line L2. Specifically, the conductive plugs include a first sub conductive plug and a second sub conductive plug, the first sub bridge line L112 is electrically connected to the second sensing line L2 through the first sub conductive plug, and the second sub bridge line L113 is electrically connected to the second sensing line L2 through the second sub conductive plug.
In this embodiment, the first sensing line body includes the first sub sensing line body L111 and the second sub sensing line body L114, and the bridge line includes the first sub bridge line L112 and the second sub bridge line L113.
In other embodiments, when the first sensing lines are integrally formed, the first sensing line body is also integrally formed, and the bridge lines are also integrally formed.
In the present embodiment, the width of the dam structure 300 is 20 μm to 40 μm, for example, 20 μm, 30 μm, and 40 μm, larger than the width of the second detection line L2. Within this range, the dam structure 300 can better intercept the outflow of the organic material, and better cover the second detection line L2, thereby preventing the dam structure 300 and the second detection line L2 from being difficult to cover the second detection line L2 under certain process deviation.
In this embodiment, the dam structure 300 is a multi-layer structure. The dam structure 300 includes first to nth dam films stacked, where N is an integer greater than or equal to 2. In the present embodiment, taking N equal to 3 as an example, the dam structure 300 includes a first layer of dam film 3001, a second layer of dam film 3002, and a third layer of dam film 3003, which are stacked. In other embodiments, N may be chosen equal to 2, or an integer greater than or equal to 4. It should be noted that in other embodiments, the dam structure is a single layer structure.
The first layer of dam film 3001 covers the second detection line L2, the second layer of dam film 3002 covers the first layer of dam film 3001, and the third layer of dam film 3003 covers the second layer of dam film 3002.
The display area 1001 of the display panel further includes a first planarizing layer, a second planarizing layer, and a pixel defining layer, which are stacked, the first dam film 3001 and the first planarizing layer of the display area 1001 are formed in the same layer and have the same material, the second dam film 3002 and the second planarizing layer of the display area 1001 are formed in the same layer and have the same material, and the third dam film 3003 and the pixel defining layer of the display area 1001 are formed in the same layer and have the same material. In other embodiments, a side surface of the third layer of dam film 3003 facing away from the second layer of dam film 3002 may be further formed with a support pillar for supporting a mask plate during a photolithography step.
In this embodiment, the second detection line is located outside the corner of the display area 1001, so as to reduce the influence of the instantaneous charge discharge process of the crack detection line on the display area 1001 to the maximum.
Example 2
The present embodiment provides a display panel, which is shown in fig. 3 and 4 in combination, and includes: a substrate 100', the substrate 100' including a non-display region 1002 '; a crack detecting line including a first detecting line L1' and a second detecting line L2' disposed in the non-display region 1002', the first detecting line L1' being electrically connected to the second detecting line L2 '; the resistivity of the second sensing wire L2 'is smaller than the resistivity of the first sensing wire L1'.
The substrate 100 'further includes a display region 1001', and the non-display region 1002 'surrounds the display region 1001'; the crack detection line surrounds the display area 1001'; the display panel further includes: a dam structure 300' on the non-display area 1002' and surrounding the display area 1001 '. The dam structure 300' is located between the crack detection line and the display region 1001', that is, the dam structure 300' is spaced apart from the crack detection line.
The material of the first sensing line L1 'refers to the material of the first sensing line L1 in example 1, and the material of the second sensing line L2' refers to the material of the second sensing line L2 in example 1.
The position of the first detection line L1 'is referred to as the position of the first detection line L1 in example 1, and the position of the second detection line L2' is referred to as the position of the second detection line L2 in example 1.
In a specific embodiment, the distance from the second sensing line L2 'to the substrate 100' is greater than the distance from the first sensing line L1 'to the substrate 100'.
In this embodiment, the display panel further includes: first dielectric layers 200', the first dielectric layers 200' covering the first sensing lines L1', the second sensing lines L2' being located on a portion of the surfaces of the first dielectric layers 200 'facing away from the substrate 100'; the dam structure 300' is positioned on a portion of the first medium layer 200' and covers the second sensing line L2 '.
In this embodiment, the first sensing line L1 'includes first and second spaced apart portions, and the second sensing line L2' is located between and electrically connected to the first and second portions, respectively. In other embodiments, the first sensing line is a unitary structure.
The display panel further includes: a protection structure D covering the second detection line L2'.
The protective structure D is made of inorganic materials. The protection structure D is a multilayer structure or a single-layer structure.
In this embodiment, the dam structure 300' is a multi-layer structure. The dam structure 300 'includes first to nth dam films 3001' to N, N being an integer greater than or equal to 2, which are stacked. In the present embodiment, taking N equal to 3 as an example, the dam structure 300 'includes a first layer of dam film 3001', a second layer of dam film 3002', and a third layer of dam film 3003' which are stacked. In other embodiments, N may be chosen equal to 2, or an integer greater than or equal to 4. It should be noted that in other embodiments, the dam structure is a single layer structure.
The display panel of this embodiment is similar to that of embodiment 1, and will not be described herein again.
Note that, in fig. 3, for convenience of illustration, fig. 3 does not show the protection structure, and the protection structure D is shown in the cross-sectional view of fig. 4.
Example 3
The embodiment provides a manufacturing method of a display panel, which comprises the following steps: providing a substrate 100, wherein the substrate 100 comprises a non-display area 1002; forming a crack detecting line on the non-display region 1002 of the substrate 100, the forming of the crack detecting line including: forming a first sensing line L1 on the non-display region 1002 of the substrate 100; second sensing lines L2 are formed on the non-display region 1002 of the substrate 100, the second sensing lines L2 are electrically connected to the first sensing lines L1, and the resistivity of the second sensing lines L2 is less than that of the first sensing lines L1.
In one embodiment, after the first sensing line L1 is formed, the second sensing line L2 is formed. In other embodiments, it may be: after the second sensing lines are formed, first sensing lines are formed.
In one embodiment, the step of forming the first detection line L1 includes: forming an initial first sensing line, and etching the initial first sensing line such that the initial first sensing line forms spaced first and second portions L11 and L12. Reference is made to the previous embodiments with respect to the description of the first portion L11 and the second portion L12. In other embodiments, the first detection line is an integral structure of the first detection line.
After the second sensing line L2 is formed, the second sensing line L2 is located between the first portion L11 and the second portion L12 and electrically connected to the first portion L11 and the second portion L12, respectively.
The first sensing line L1 and the second sensing line L2 are disposed at the same layer, or the first sensing line L1 and the second sensing line L2 are disposed at different layers.
The substrate further comprises a display area 1001, and the non-display area 1002 surrounds the display area 1001; the crack detection line surrounds the display area 1001.
The manufacturing method of the display panel further includes: after the crack detection lines are formed, a dam structure 300 surrounding the display area 1001 is formed on the non-display area 1002 of the substrate 100. The description about the dam structure 300 refers to embodiment 1.
In a specific embodiment, the distance from the second sensing line L2 to the substrate 100 is greater than the distance from the first sensing line L1 to the substrate 100, and the dam structure 300 covers the second sensing line L2.
The first sensing line L1 includes a first sensing line body located at an outer side of the dam structure 300 and a bridge line connected to the first sensing line body, the bridge line extending from one end of the first sensing line body to a bottom of the dam structure 300, the bridge line being electrically connected to the second sensing line L2. Specifically, the bridge lines are electrically connected to the second sensing lines L2 through conductive plugs located in the first dielectric layer 200.
The manufacturing method of the display panel further includes: after forming the first sensing line L1 and before forming the second sensing line L2, forming a first dielectric layer 200 on the substrate 100, the first dielectric layer 200 covering the first sensing line L1; after the second sensing lines L2 and the dam structures 300 are formed, the second sensing lines L2 are located on a portion of the surface of the first medium layer 200 facing away from the substrate 100; the dam structure 300 is positioned on a portion of the first medium layer 200 and covers the second sensing line L2.
The step of forming the dam structure comprises: a first layer of dam film 3001 is formed on the non-display area 1002, the first layer of dam film 3001 covering the second detection line L2.
The manufacturing method of the display panel further includes: after the first-layer dam film 3001 is formed, a conductive line (not shown) is formed on the display area 1001 of the substrate 100.
The step of forming the dam structure 300 further comprises: after the first-layer dam film 3001 is formed, second to nth-layer dam films 3002 to 3001 are formed on the first-layer dam film 3001, N being an integer greater than or equal to 2. Specifically, in the present embodiment, the second-layer dam film 3002 is formed on the first-layer dam film 3001, and the third-layer dam film 3003 is formed on the second-layer dam film 3002.
Forming the conductive line after forming the first-layer dam film 3001 and before forming the second-layer dam film 3002; alternatively, the conductive line is formed after the dam structure 300 is formed.
The manufacturing method of the display panel further includes: after the conductive lines are formed, a thin film encapsulation layer (not shown) is formed on the substrate 100; and after the thin film packaging layer is formed, carrying out reliability test on temperature and humidity.
Because first layer of dammed membrane covers the second detection line, first layer of dammed membrane protection the second detection line is not by the technology side etching that forms the conductor wire, the stable in structure of second detection line, at the in-process that forms the film packaging layer, the second detection line can not collapse, the film packaging layer can be to the better encapsulation of rete on the base plate, can not form the hole between film packaging layer and the rete by the encapsulation, consequently in carrying out the reliability test of temperature and humidity, avoid the second detection line to receive the environmental impact of the reliability test of temperature and humidity and corroded, avoid the second detection line to break the line in the reliability test of temperature and humidity. Due to the fact that the second detection line is prevented from being broken in the reliability test of temperature and humidity, the accuracy of crack detection of the crack detection line is guaranteed.
Example 4
This embodiment provides another manufacturing method of a display panel, which is different from the manufacturing method in embodiment 3 described above in that: the dam structure 300' is located between the crack detection line and the display area 1001', that is, the dam structure 300' is spaced apart from the crack detection line; a protection structure D is formed on the second sensing line L2'.
The protective structure D is made of inorganic materials. The protection structure D is a multilayer structure or a single-layer structure.
The remaining steps are the same as those in embodiment 3, and are not described herein.
Example 5
This embodiment provides a display device including the display panel as in embodiment 1 or embodiment 2 described above.
Owing to set up the second detection line, the resistivity of second detection line is less than the resistivity of first detection line for the bulk resistance of crack detection line reduces, and at the in-process of electric charge release, the resistance of the whole route that electric charge need flow through reduces, makes the easier release of follow crack detection line of electric charge go out, avoids first detection line burn, avoids crack detection line burn.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A display panel, comprising:
a substrate including a non-display region;
a crack detecting line including a first detecting line and a second detecting line disposed in the non-display area, the first detecting line being electrically connected to the second detecting line; the resistivity of the second sensing wire is less than the resistivity of the first sensing wire.
2. The display panel according to claim 1, wherein the first and second inspection lines are located at different layers, and preferably, the distance from the second inspection line to the substrate is greater than the distance from the first inspection line to the substrate;
or the first detection line and the second detection line are arranged in the same layer;
preferably, the first sensing line includes first and second portions spaced apart from each other, and the second sensing line is located between and electrically connected to the first and second portions, respectively;
preferably, the material of the first detection line includes molybdenum, the second detection line includes a first sub-line film, a second sub-line film, and a third sub-line film that are stacked, the material of the first sub-line film includes titanium, the material of the second sub-line film includes aluminum, and the material of the third sub-line film includes titanium.
3. The display panel according to claim 1, wherein the substrate further comprises a display region, and the non-display region surrounds the display region; the crack detection line surrounds the display area; the display panel further includes: a dam structure on the non-display area and surrounding the display area.
4. The display panel according to claim 3, wherein the second sensing lines are located at the bottom of the dam structure;
preferably, a distance from the second sensing line to the substrate is greater than a distance from the first sensing line to the substrate; the first detection line comprises a first detection line body and a bridging line connected with the first detection line body, the first detection line body is positioned on the outer side of the dam-shaped structure, the bridging line extends from one end of the first detection line body to the bottom of the dam-shaped structure, and the bridging line is electrically connected with the second detection line;
preferably, the width of the dam structure is 20 to 40 μm larger than the width of the second inspection line;
preferably, the dam structure is a multilayer structure;
preferably, the second detection line is located outside a corner of the display area;
preferably, the display panel further includes: the first dielectric layer covers the first detection line, and the second detection line is positioned on the part of the surface of the first dielectric layer, which faces away from the substrate; the dam structure is located on a part of the first medium layer and covers the second detection line.
5. The display panel according to claim 3,
the dam structure is located between the crack detection line and the display area;
the display panel further includes: a protective structure covering the crack detection line;
preferably, the protective structure is an inorganic material;
preferably, the protective structure is a multilayer structure.
6. A method for manufacturing a display panel, comprising:
providing a substrate, wherein the substrate comprises a non-display area;
forming a crack detecting line on a non-display region of the substrate, the forming of the crack detecting line including: forming a first detection line on a non-display region of the substrate; and forming a second detection line on the non-display area of the substrate, wherein the second detection line is electrically connected with the first detection line, and the resistivity of the second detection line is smaller than that of the first detection line.
7. The method of manufacturing a display panel according to claim 6, wherein after the first inspection lines are formed, second inspection lines are formed;
preferably, the step of forming the first sensing line includes: forming an initial first detection line, and etching the initial first detection line to enable the initial first detection line to form a first part and a second part which are separated;
after forming the second sensing line, the second sensing line is positioned between and electrically connected to the first portion and the second portion, respectively;
the first detection line and the second detection line are arranged on the same layer, or the first detection line and the second detection line are located on different layers.
8. The method according to claim 6, wherein the substrate further comprises a display region, and the non-display region surrounds the display region; the crack detection line surrounds the display area;
the manufacturing method of the display panel further includes: forming a dam structure surrounding the display area on a non-display area of the substrate after forming the crack detection line;
preferably, the distance from the second inspection line to the substrate is greater than the distance from the first inspection line to the substrate, and the dam structure covers the second inspection line;
preferably, the method for manufacturing a display panel further includes: forming a first dielectric layer on the substrate after forming the first sensing line and before forming the second sensing line, the first dielectric layer covering the first sensing line; after the second detection line and the dam structure are formed, the second detection line is positioned on the part, facing away from the substrate, of the surface of the first medium layer; the dam structure is located on a part of the first medium layer and covers the second detection line.
9. The method of manufacturing a display panel according to claim 8, wherein the step of forming the dam structure comprises: forming a first layer of dam film on the non-display area, the first layer of dam film covering the second inspection line;
the manufacturing method of the display panel further includes: forming a conductive line on a display area of the substrate after forming the first layer of the dam film;
preferably, the step of forming the dam structure further comprises: forming second to nth dam films on the first dam film after the first dam film is formed, N being an integer greater than or equal to 2;
preferably, the conductive line is formed after the first-layer dam film is formed and before the second-layer dam film is formed; alternatively, after forming the dam structure, forming the conductive line;
preferably, the method for manufacturing a display panel further includes: after the conductive lines are formed, forming a thin film encapsulation layer on the substrate; and after the thin film packaging layer is formed, carrying out reliability test on temperature and humidity.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110007505.0A CN112837616B (en) | 2021-01-05 | 2021-01-05 | Display panel, manufacturing method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110007505.0A CN112837616B (en) | 2021-01-05 | 2021-01-05 | Display panel, manufacturing method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112837616A true CN112837616A (en) | 2021-05-25 |
| CN112837616B CN112837616B (en) | 2022-09-06 |
Family
ID=75927618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110007505.0A Active CN112837616B (en) | 2021-01-05 | 2021-01-05 | Display panel, manufacturing method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112837616B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539087A (en) * | 2021-06-24 | 2021-10-22 | 上海中航光电子有限公司 | First display panel, second display panel, manufacturing method of second display panel and display device |
| WO2023105796A1 (en) * | 2021-12-10 | 2023-06-15 | シャープディスプレイテクノロジー株式会社 | Display device and inspection method using display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869551A (en) * | 2015-02-06 | 2016-08-17 | 三星显示有限公司 | Display device |
| CN107767801A (en) * | 2016-08-22 | 2018-03-06 | 三星显示有限公司 | Display device |
| CN108922909A (en) * | 2018-07-26 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of array substrate, display panel and display device |
| CN109597226A (en) * | 2018-12-25 | 2019-04-09 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN110047816A (en) * | 2019-04-30 | 2019-07-23 | 厦门天马微电子有限公司 | A kind of array substrate, display panel and display device |
| CN111261045A (en) * | 2018-11-30 | 2020-06-09 | 三星显示有限公司 | Electronic device including crack detection wiring |
| CN111445797A (en) * | 2020-04-07 | 2020-07-24 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
-
2021
- 2021-01-05 CN CN202110007505.0A patent/CN112837616B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869551A (en) * | 2015-02-06 | 2016-08-17 | 三星显示有限公司 | Display device |
| CN107767801A (en) * | 2016-08-22 | 2018-03-06 | 三星显示有限公司 | Display device |
| CN108922909A (en) * | 2018-07-26 | 2018-11-30 | 京东方科技集团股份有限公司 | A kind of array substrate, display panel and display device |
| CN111261045A (en) * | 2018-11-30 | 2020-06-09 | 三星显示有限公司 | Electronic device including crack detection wiring |
| CN109597226A (en) * | 2018-12-25 | 2019-04-09 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN110047816A (en) * | 2019-04-30 | 2019-07-23 | 厦门天马微电子有限公司 | A kind of array substrate, display panel and display device |
| CN111445797A (en) * | 2020-04-07 | 2020-07-24 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539087A (en) * | 2021-06-24 | 2021-10-22 | 上海中航光电子有限公司 | First display panel, second display panel, manufacturing method of second display panel and display device |
| WO2023105796A1 (en) * | 2021-12-10 | 2023-06-15 | シャープディスプレイテクノロジー株式会社 | Display device and inspection method using display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112837616B (en) | 2022-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112837616B (en) | Display panel, manufacturing method thereof and display device | |
| RU2738785C1 (en) | Display panel, a display device, a method of detecting a crack in a sealing layer of a display panel and a method of making a display panel | |
| KR20180093191A (en) | Chip on film package, display panel, and display device | |
| US20130069181A1 (en) | Encapsulation structure for silicon pressure sensor | |
| US7533570B2 (en) | Electrostatic-capacitance-type acceleration sensor | |
| US10600992B2 (en) | Package structure, method for manufacturing the same, method for detecting package defect, OLED device and display apparatus | |
| CN113157137B (en) | Touch display panel and display device | |
| CN110095704A (en) | Detect the device and method of circuit defect in array substrate | |
| CN112378960A (en) | Display substrate, display screen and crack detection method | |
| KR20220061188A (en) | battery electrode with sensor | |
| US20140202855A1 (en) | Electrochemical Sensor Device | |
| CN109142453B (en) | Display panel and display panel detection method | |
| CN111309173B (en) | Touch electrode, touch display panel and touch display device | |
| JP2006300578A (en) | Capacitance type pressure sensor and vacuum degree evaluation method of vacuum chamber thereof | |
| CN110752187B (en) | Preparation method of display substrate and display substrate | |
| CN110718559A (en) | Array substrate, preparation method and display panel | |
| JPS61155931A (en) | Electrical pressure generator | |
| CN113360024B (en) | Touch panel and crack detection method thereof | |
| US20210091121A1 (en) | Array substrate, method of manufacturing same, and display panel | |
| US11561145B2 (en) | Sensor membrane structure with insulating layer | |
| CN114864543A (en) | Display panel, display panel manufacturing method and electronic device | |
| CN210986579U (en) | Substrate and display device | |
| CN113658974A (en) | Light-emitting substrate, preparation method and test method thereof, and display device | |
| EP2555006B1 (en) | Semiconductor device | |
| JPH06186249A (en) | Capacitive acceleration detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |