阅读说明：本技术 显示装置、显示面板及其制备方法 (Display device, display panel and preparation method thereof ) 是由 邹美玲 于 2019-09-17 设计创作，主要内容包括：本发明提供一种显示装置、显示面板及其制备方法,该显示面板包括：数据线层,所述数据线层形成有至少一数据线,所述数据线具有相对的第一边和第二边,所述第一边和所述第二边均沿第一方向延伸,在垂直于所述第一方向的第二方向上,所述数据线截面的实际长度大于所述第一边与所述第二边之间的距离。相较现有技术而言,在相同线宽的情况下,本发明所提供的数据线的电阻值更小,且可以得到更小的压降。本发明尤为适合于要求线宽满足较小尺寸的情形。(The invention provides a display device, a display panel and a preparation method thereof, wherein the display panel comprises: the data line layer is provided with at least one data line, the data line is provided with a first side and a second side which are opposite, the first side and the second side both extend along a first direction, and in a second direction perpendicular to the first direction, the actual length of the cross section of the data line is larger than the distance between the first side and the second side. Compared with the prior art, the data line provided by the invention has smaller resistance value and can obtain smaller voltage drop under the condition of the same line width. The invention is particularly suitable for the situation that the line width is required to meet the requirement of smaller size.)

1. A display panel is characterized by comprising a data line layer, wherein at least one data line is formed on the data line layer, the data line is provided with a first edge and a second edge which are opposite, the first edge and the second edge both extend along a first direction, and the actual length of the cross section of the data line is larger than the distance between the first edge and the second edge in a second direction perpendicular to the first direction.

2. The display panel of claim 1, wherein a cross section of the data line in the second direction has at least one segment with an arc shape.

3. The display panel according to claim 1, wherein the display panel comprises a display area and a peripheral routing area disposed around the display area, and the data line layer is located in the display area and/or the peripheral routing area.

4. The display panel of claim 3, wherein the data line layer comprises a first data line layer and a second data line layer, the first data line layer is disposed in the display area, and a first inorganic insulating layer and a second inorganic insulating layer are disposed on two sides of the first data line layer respectively; the second data line layer is located in the peripheral wiring area, and a first organic layer and a second organic layer are respectively arranged on two sides of the second data line layer.

5. A method for manufacturing a display panel is characterized by comprising the following steps:

providing a substrate;

forming a patterned first film layer on a substrate, wherein at least one first strip-shaped area is formed on a first surface of the patterned first film layer, which is far away from the substrate, and the first strip-shaped area is provided with a first edge and a second edge which are opposite to each other, and the first edge and the second edge both extend along a first direction; in a second direction perpendicular to the first direction, the length of the first face in each first strip-shaped area is larger than the distance between the first edge and the second edge;

depositing a data line layer on the first surface of the patterned first film layer, so that at least one second strip-shaped area is formed on the data line layer, and orthographic projections of the second strip-shaped areas on the first film layer are respectively overlapped with the first strip-shaped areas; and

and forming at least one data line based on the at least one second strip-shaped area.

6. The method according to claim 5, wherein at least one data line is formed on the data line layer, and at least one section of the cross section of the data line in the second direction is arc-shaped.

7. The method according to claim 6, wherein the first surface of the patterned first film layer is convex in a direction away from the substrate or concave in a direction toward the substrate in the first stripe region.

8. The method of claim 6, wherein the step of forming a patterned first layer on the substrate comprises:

forming a first film layer on the substrate;

and photoetching and hardening the flattened organic layer by utilizing a gray-scale photomask to obtain the patterned first film layer.

9. The method according to claim 6, wherein the step of forming at least one data line based on the at least one second stripe region comprises:

and carrying out photoresist coating, exposure, development, etching and photoresist stripping processes on the parts of the data line layer outside the second strip-shaped areas by using a gray-scale photomask to form the at least one data line.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 4.

Technical Field

The invention relates to the field of display panels, in particular to a display device, a display panel and a preparation method of the display panel.

Background

With the development of society and the continuous progress of science and technology, the requirements of people on display screens are higher and higher. The display screen is larger and narrower, and the trend that the high screen occupation ratio is the mainstream all over the world is pursued. AMOLED (Active-matrix organic light-emitting diode, i.e. Active matrix organic light-emitting diode or Active matrix organic light-emitting diode) is a trend of next generation display screen development, and has higher and higher requirements for resolution and narrow frame; therefore, the routing requirements for data lines and the like in the AMOLED panel are getting thinner; reducing line width to increase line arrangement density is one method to achieve high resolution and narrow frame screens, but narrow line width can have negative effects such as higher impedance.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a display device, a display panel and a preparation method thereof, which aim to reduce the impedance of a data line under the condition of the same line width.

According to an aspect of the present invention, there is provided a display panel including a data line layer formed with at least one data line having opposite first and second sides each extending in a first direction, and a substantial length of a cross section of the data line in a second direction perpendicular to the first direction is greater than a distance between the first and second sides.

In an embodiment of the invention, at least one section of the cross section of the data line in the second direction is arc-shaped.

In an embodiment of the present invention, the display panel includes a display area and a peripheral routing area disposed around the display area, and the data line layer is located in the display area and/or the peripheral routing area.

In an embodiment of the present invention, the data line layer includes a first data line layer and a second data line layer, the first data line layer is located in the display area, and a first inorganic insulating layer and a second inorganic insulating layer are respectively disposed on two sides of the first data line layer; the second data line layer is located in the peripheral wiring area, and a first organic layer and a second organic layer are respectively arranged on two sides of the second data line layer.

According to another aspect of the present invention, there is provided a method of manufacturing a display panel, the method including:

providing a substrate;

forming a patterned first film layer on a substrate, wherein at least one first strip-shaped area is formed on a first surface of the patterned first film layer, which is far away from the substrate, and the first strip-shaped area is provided with a first edge and a second edge which are opposite to each other, and the first edge and the second edge both extend along a first direction; in a second direction perpendicular to the first direction, the length of the first face in each first strip-shaped area is larger than the distance between the first edge and the second edge;

depositing a data line layer on the first surface of the patterned first film layer, so that at least one second strip-shaped area is formed on the data line layer, and orthographic projections of the second strip-shaped areas on the first film layer are respectively overlapped with the first strip-shaped areas; and

and forming at least one data line based on the at least one second strip-shaped area.

In an embodiment of the present invention, at least one data line is formed on the data line layer, and at least one section of the cross section of the data line in the second direction is arc-shaped.

In an embodiment of the invention, the first surface of the patterned first film layer protrudes from the substrate or is recessed toward the substrate in the first stripe region.

In an embodiment of the present invention, the step of forming a patterned first film on a substrate includes:

forming a first film layer on the substrate;

and photoetching and hardening the flattened organic layer by utilizing a gray-scale photomask to obtain the patterned first film layer.

In an embodiment of the present invention, the step of forming at least one data line based on the at least one second stripe region includes:

and carrying out photoresist coating, exposure, development, etching and photoresist stripping processes on the parts of the data line layer outside the second strip-shaped areas by using a gray-scale photomask to form the at least one data line.

According to still another aspect of the present invention, there is provided a display device including the display panel as described above.

The data line in the invention has a first side and a second side which are opposite, the first side and the second side both extend along a first direction, and in a second direction perpendicular to the first direction, the actual length of the cross section of the data line is larger than the distance between the first side and the second side. The present invention is particularly suitable for the case where the required line width satisfies the smaller dimension, because the data line in the present invention has a larger effective line width (i.e. the actual length of the cross section of the data line) to reduce the impedance under the condition that the required line width satisfies the smaller dimension. Furthermore, the patterned routing design in the invention is beneficial to improving the bending resistance of the display panel, and is suitable for in-plane and edge routing of a panel or a touch structure and an Outer Lead Bonding (OLB) area of the panel.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention, and further features, objects, and advantages of the invention will become apparent from a reading of the following detailed description of non-limiting embodiments with reference to the drawings. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 to 5 are schematic diagrams illustrating a method for manufacturing a data line layer of a display panel according to an embodiment of the invention.

FIG. 6 is a cross-sectional view of a data line layer in an embodiment of the invention.

FIG. 7 is a schematic diagram of a data line layer according to another embodiment of the present invention. And

fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the invention.

Reference numerals

1 substrate

2 patterning the first film layer

21 first film layer

22 first strip-shaped area

3 data line layer

31 data line

4 second film layer

100 display area

101 organic layer

102 pixel definition layer

103 gap control layer

110 flexible substrate

120 buffer layer

130 first insulating layer

140 second insulating layer

150 first inorganic insulating layer

160 first data line layer

170 second inorganic insulating layer

181 first inorganic thin film encapsulation layer

182 second inorganic thin film encapsulation layer

190 organic buffer layer

200 peripheral wiring area

210 first organic layer

220 second data line layer

230 second organic layer

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

Fig. 6 is a cross-sectional view of a data line 31 of the data line layer 3 according to an embodiment of the present invention. According to an aspect of the present invention, there is provided a display panel including a data line layer 3, the data line layer 3 being formed with at least one data line 31. As shown in fig. 6, the data line 31 has a first side and a second side opposite to each other, the first side and the second side both extending along a first direction, and a substantial length L of a cross section of the data line 31 is measured in a second direction perpendicular to the first direction₁Is larger than the distance L between the first edge and the second edge₂. The first direction described in this embodiment may be understood as a length direction of the data line 31, and the second direction may be understood as a width direction of the data line 31. When the cross-sectional length of the data line 31 in the width direction is greater than the distance between the first side of the data line 31 and the second side of the data line 31, the effective line width of the data line 31 (i.e., the actual length of the cross-section of the data line 31) may be increased, thereby reducing the impedance of the data line 31. It will be understood by those skilled in the art that the greater the difference between the aforementioned cross-sectional length and the aforementioned distance, the lower the impedance of the data line 31.

Referring to fig. 1-5, the manufacturing method of the display panel includes the following steps:

s10, a substrate 1 is provided.

S20, forming a patterned first film 2 on the substrate 1, wherein a first side of the patterned first film 2 facing away from the substrate 1 is formed with at least a first stripe region 22, the first stripe region 22 has a first edge and a second edge opposite to each other, and the first edge and the second edge both extend along a first direction. In a second direction perpendicular to the first direction, the length of the first face in each of the first stripe-shaped regions 22 is greater than the distance between the first edge and the second edge.

S30, depositing the data line layer 3 on the first side of the patterned first film 2, so that the data line layer 3 has at least one second stripe region, and an orthographic projection of each second stripe region on the first film 21 overlaps with one first stripe region 22.

S40, forming at least one data line 31 based on the at least one second stripe region. In this embodiment, the data line layer 3 is formed with at least one data line 31, and a cross section of the data line 31 in the second direction has at least one arc shape. Since the requirements for the line arrangement are different for panels of different sizes, the present invention does not limit the radius of curvature of the arc-shaped cross section and the interval between the arc-shaped cross sections (in the case where the cross section of the data line 31 in the second direction has a multi-segment arc shape). The step of forming at least one data line 31 based on the at least one second stripe region comprises: the data line 31 is formed by performing photoresist coating, exposing, developing, etching and photoresist stripping processes on the data line layer 3 except for the second stripe regions by using a gray tone mask. Then, a second film layer is formed to cover the data line 31, so as to effectively protect the data line.

As would be expected by one skilled in the art based on the foregoing, the line width L is greater than that of the prior art₂In the same case, the effective line width (i.e. the actual length of the cross section of the data line 31) L of the data line 31 in the present invention₁Larger than the line width L2, the resistance of the data line 31 is smaller, and a smaller voltage drop can be obtained. The invention is particularly suitable for the required line width L₂The smaller size case is satisfied. The reason is that the required line width L is₂The data line 31 in the present invention has a larger effective line width (i.e. the actual length of the cross section of the data line 31) to reduce the impedance when the smaller size is satisfied. Furthermore, the patterned routing design in the invention is beneficial to improving the bending resistance of the display panel, and is suitable for in-plane and edge routing of a panel or a touch structure and an Outer Lead Bonding (OLB) area of the panel.

Fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the invention. As shown in fig. 8, the display panel is divided into a display area 100 and a peripheral wiring area 200 disposed around the display area 100, and the display area 100 and the peripheral wiring area 200 of the display panel simultaneously have the data line layer 3 as described above. Of course, the data line layer 3 may be disposed only in the display area 100 or the peripheral wiring area 200. The display area 100 includes: the organic light emitting diode display device includes a flexible substrate 110, a buffer layer 120, a first insulating layer 130, a second insulating layer 140, a first inorganic insulating layer 150, a first data line layer 160, a second inorganic insulating layer 170, an organic layer 101, a pixel defining layer 102, a gap control layer 103, a first inorganic thin film encapsulation layer 181, an organic buffer layer 190, and a second inorganic thin film encapsulation layer 182. The first and second inorganic insulating layers 150 and 170 are disposed on both sides of the first data line layer 160, respectively. The peripheral wiring region 200 includes: the flexible substrate 110, a first organic layer 210, a second data line layer 220, and a second organic layer 230, the second data line layer 220 being located between the first organic layer 210 and the second organic layer 230. As shown in fig. 6, at least one section of the cross section of the data line 31 in the second direction is formed in an arc shape. That is, the cross section may be formed in a single arc shape in the width direction of the data line 31, or may be formed in a curved shape including multiple arc shapes. Since the requirements for the line arrangement are different for panels of different sizes, the present invention does not limit the radius of curvature of the arc-shaped cross section and the interval between the arc-shaped cross sections (in the case where the cross section of the data line 31 in the second direction has a multi-segment arc shape). Thereby increasing the effective line width of the data line 31 (i.e., the actual length of the cross section of the data line 31) to reduce the impedance.

According to the above method for manufacturing a display panel, the method for manufacturing the first data line layer 160 of the display area 100 shown in fig. 8 may include the following steps:

s11, the second insulating layer 140 is used as the substrate 1. The second insulating layer 140 is an interlayer insulating layer, and can be used for planarization of a circuit while having an effect.

S21, forming a first inorganic insulating layer 150 on the second insulating layer 140, wherein a first side of the first inorganic insulating layer 150 facing away from the substrate 1 is formed with at least a first stripe region 22, the first stripe region 22 has a first side and a second side opposite to each other, and the first side and the second side both extend along a first direction. In a second direction perpendicular to the first direction, the length of the first face in each of the first stripe-shaped regions 22 is greater than the distance between the first edge and the second edge. In this embodiment, the first surface of the first inorganic insulating layer 150 protrudes in the first stripe region 22 in a direction away from the substrate 1. Fig. 7 is a schematic structural diagram of a data line layer 3 of a display panel according to another embodiment of the invention. As shown in fig. 7, in other embodiments of the present invention, the first surface of the first inorganic insulating layer 150 in the first stripe region 22 may also be recessed toward the substrate 1.

S31, depositing the first data line layer 160 on the first side of the first inorganic insulating layer 150, so that the first data line layer 160 forms at least one second stripe region, and the orthographic projection of each second stripe region on the first inorganic insulating layer 150 overlaps with one first stripe region 22. The first data line layer 160 may be deposited by CVD (chemical vapor deposition), and the first data line layer 160 is formed in a protrusion or groove structure similar to the first stripe region 22 at the first stripe region 22 of the first side of the first inorganic insulating layer 150, that is, the second stripe region of the data line layer 3.

S41, forming at least one data line 31 based on the at least one second stripe region. In this embodiment, the first data line layer 160 is formed with at least one data line 31, and a cross section of the data line 31 in the second direction has at least one arc shape. Specifically, a gray-scale mask may be used to perform photoresist coating, exposing, developing, etching and photoresist stripping processes on the portions of the first data line layer 160 outside the second stripe regions to form the at least one data line 31.

It should be noted that other layers of the display area 100, except for the first data line layer 160 and the first inorganic insulating layer 150, may be formed by conventional techniques.

Further, the method for manufacturing the second data line layer 220 of the peripheral routing area 200 shown in fig. 8 may include the following steps:

s12, the flexible substrate 110 of the display panel is used as the substrate 1. The flexible substrate 110 may be made of a flexible substrate 1 material such as Polyimide (PI), polyethylene terephthalate (PET), polybutylene naphthalate (PBN), or polycarbonate, or may be made of a material such as metal foil.

S22, forming a first organic layer 210 on the flexible substrate 110, wherein a first side of the first organic layer 210 facing away from the base board 1 is formed with at least a first stripe region 22, and the first stripe region 22 has a first edge and a second edge opposite to each other, and the first edge and the second edge both extend along a first direction. In a second direction perpendicular to the first direction, the length of the first face in each of the first stripe-shaped regions 22 is greater than the distance between the first edge and the second edge. In this embodiment, the first surface of the first organic layer 210 protrudes in the first stripe region 22 in a direction away from the substrate 1. Fig. 7 is a schematic structural diagram of a data line layer 3 of a display panel according to another embodiment of the invention. In other embodiments of the present invention, as shown in fig. 7, the first side of the patterned first film 2 in the first stripe-shaped region 22 may also be recessed toward the substrate 1.

S32, depositing the data line layer 3 on the first side of the first organic layer 210, so that the data line layer 3 forms at least one second stripe region, and the orthographic projection of each second stripe region on the first film layer 21 overlaps with one first stripe region 22. The second data line layer 220 may be deposited by CVD (chemical vapor deposition), and the second data line layer 220 is formed in a protrusion or groove structure similar to the first stripe region 22 at the first stripe region 22 of the first side of the first organic layer 210, that is, a second line region of the second data line layer 220.

S42, forming at least one data line 31 based on the at least one second stripe region. In this embodiment, the second data line layer 220 is formed with at least one data line 31, and a cross section of the second data line 31 in the second direction has at least one arc shape. Specifically, a gray-scale mask may be used to perform photoresist coating, exposing, developing, etching and photoresist stripping processes on the portions of the second data line layer 220 outside the second stripe regions to form the at least one data line 31.

As would be expected by one skilled in the art based on the foregoing, the line width L is greater than that of the prior art₂In the same case, the effective line width (i.e. the actual length of the cross section of the data line 31) L of the data line 31 in the present invention₁Larger than the line width L2, the resistance of the data line 31 is smaller, and a smaller voltage drop can be obtained. The invention is particularly suitable for the required line width L₂The smaller size case is satisfied. The reason is that the required line width L is₂The data line 31 in the present invention has a larger effective line width (i.e. the actual length of the cross section of the data line 31) to reduce the impedance when the smaller size is satisfied. Furthermore, the patterned routing design in the invention is beneficial to improving the bending resistance of the display panel, and is suitable for in-plane and edge routing of a panel or a touch structure and an Outer Lead Bonding (OLB) area of the panel.

The embodiment of the present disclosure also provides a display device, which includes the display panel as described above. In specific implementation, the display device provided in the embodiments of the present disclosure may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a media player, a watch device, a pendant device, an earphone or a headphone device, a navigation device, a wearable or miniature device, an embedded device of a system in which an electronic device having a display is installed in a self-service terminal or an automobile, and the like. In summary, as would be expected by one skilled in the art from the above-described scheme, the line width L is greater than that of the prior art₂In the same case, the effective line width (i.e. the actual length of the cross section of the data line 31) L of the data line 31 in the present invention₁Larger than the line width L2, the resistance of the data line 31 is smaller, and a smaller voltage drop can be obtained. The invention is particularly suitable for the required line width L₂The smaller size case is satisfied. The reason is thatRequired line width L₂The data line 31 in the present invention has a larger effective line width (i.e. the actual length of the cross section of the data line 31) to reduce the impedance when the smaller size is satisfied. Furthermore, the patterned routing design in the invention is beneficial to improving the bending resistance of the display panel, and is suitable for in-plane and edge routing of a panel or a touch structure and an Outer Lead Bonding (OLB) area of the panel.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. At least one unit or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. It is to be understood that the terms "lower" or "upper", "downward" or "upward" and the like are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures; the terms first, second, etc. are used to denote names, but not any particular order.