CN114460773B - Display panel to be cut, display panel and display device - Google Patents
Display panel to be cut, display panel and display device Download PDFInfo
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- CN114460773B CN114460773B CN202210102963.7A CN202210102963A CN114460773B CN 114460773 B CN114460773 B CN 114460773B CN 202210102963 A CN202210102963 A CN 202210102963A CN 114460773 B CN114460773 B CN 114460773B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133351—Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The application discloses a display panel to be cut, a display panel and a display device, wherein the display panel to be cut is provided with a binding area and a region to be cut; the binding region includes a plurality of pad regions; each pad region includes a body region and an extension region extending from the body region toward the region to be cut; the display panel to be cut comprises a substrate positioned in the binding area, a first insulating layer and a first metal layer which are positioned in the main body area and the extension area and are sequentially arranged on the substrate, and a second metal layer which is positioned in the main body area and is positioned between the substrate and the first insulating layer; the first metal layer is electrically connected with the second metal layer, and the stability of the first metal layer is greater than that of the second metal layer; the distance between the main body area and the area to be cut is larger than or equal to a preset safety distance, and the distance between the extension area and the area to be cut is larger than or equal to 0 and smaller than the preset safety distance. The application can realize narrow frames and improve binding effect on the basis of not increasing cutting risk.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel to be cut, a display panel and a display device.
Background
In the production process of the display panel, a large substrate is generally cut for the first time to form a plurality of small display panels to be cut, and then the small display panels to be cut are cut for the second time to form the display panel which can be bound with an external circuit board.
Because the binding area of the display panel to be cut is adjacent to the area to be cut, and the cutting line is positioned between the binding area and the area to be cut, when the secondary cutting is performed, in order to prevent the pad structure of the binding area from being damaged due to the influence of cutting precision and cutting related defects (such as cracks and the like), the preset safety distance is usually kept between the whole pad structure and the cutting line, and the design is not beneficial to realizing a narrow frame and improving the binding effect.
Disclosure of Invention
The application provides a display panel to be cut, a display panel and a display device, which can realize a narrow frame and improve the binding effect on the basis of not increasing the cutting risk.
The application provides a display panel to be cut, which is provided with a binding area and a region to be cut, wherein the region to be cut is adjacent to the binding area; the binding area comprises a plurality of pad areas which are sequentially arranged at intervals; each pad region includes a body region and an extension region extending from the body region toward the region to be cut;
the display panel to be cut comprises a substrate positioned in the binding area, a first insulating layer and a first metal layer which are positioned in the main body area and the extension area and are sequentially arranged on the substrate, and a second metal layer which is positioned in the main body area and is positioned between the substrate and the first insulating layer; the first metal layer is electrically connected with the second metal layer, and the stability of the first metal layer is greater than that of the second metal layer;
the distance between the main body area and the area to be cut is larger than or equal to a preset safety distance, and the distance between the extension area and the area to be cut is larger than or equal to 0 and smaller than the preset safety distance.
Optionally, the display panel to be cut further includes a second insulating layer located at the extension region and located between the first insulating layer and the substrate.
Optionally, the display panel to be cut further includes a second insulating layer located at the main body region and the extension region and located at a side of the second metal layer away from the first insulating layer, and a third metal layer located at the main body region and located between the second insulating layer and the substrate;
the second metal layer is electrically connected with the third metal layer.
Optionally, the display panel to be cut further includes a filler metal layer located in the extension region and located between the first insulating layer and the substrate; the filling metal layer is arranged in an insulating manner with the second metal layer, and the stability of the filling metal layer is greater than that of the second metal layer.
Optionally, a plurality of first through holes are formed on the first insulating layer located in the main body region, and the first metal layer is electrically connected with the second metal layer through the plurality of first through holes;
and a plurality of second through holes are formed in the first insulating layer located in the extension region, and the first metal layer is also located in the second through holes.
Optionally, the apertures of the first through holes and the second through holes are the same, and the distribution density of the first through holes and the distribution density of the second through holes are the same.
Optionally, a width of at least a portion of the extension region near the region to be cut is smaller than a width of the main body region.
Optionally, the material of the first metal layer includes indium tin oxide, and the material of the second metal layer includes any one of molybdenum and aluminum.
The application also provides a display panel which comprises the structure of the display panel to be cut after the display panel to be cut is cut in the area to be cut.
The application also provides a display device which comprises the display panel and a circuit board; the circuit board is in binding connection with the first metal layer located in the binding area.
In the display panel to be cut, the display panel and the display device provided by the application, the pad structure of the binding area is at least composed of the first metal layer, the first insulating layer and the second metal layer which are positioned in the pad area, wherein the first metal layer is positioned in the main body area and the extension area of the pad area, the second metal layer is only positioned in the main body area of the pad area, and the stability of the first metal layer is larger than that of the second metal layer; because the distance between the main body area and the area to be cut is larger than or equal to the preset safety distance, and the distance between the extension area and the area to be cut is larger than or equal to 0 and smaller than the preset safety distance, compared with the traditional structure, the distance between the first metal layer with higher stability and the area to be cut is smaller; because the stability of the first metal layer is strong, the cutting risk is not increased by properly shortening the distance between the first metal layer and the region to be cut, and the narrow frame is facilitated to be realized; in addition, the first metal layer extends towards the area to be cut relative to the second metal layer and the third metal layer, so that the area of the first metal layer is increased, namely the binding area is increased, and the binding effect is improved.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel to be cut according to an embodiment of the application.
Fig. 2 is a top view of a spacer region of a display panel to be cut according to an embodiment of the present application.
Fig. 3 is a schematic cross-sectional structure of a spacer region of a display panel to be cut according to an embodiment of the application.
Fig. 4 is a top view of a spacer region of a display panel to be cut according to a second embodiment of the present application.
Fig. 5 is a schematic cross-sectional structure of a spacer region of a display panel to be cut according to a second embodiment of the present application.
Fig. 6 is a schematic cross-sectional structure of a spacer region of a display panel to be cut according to a third embodiment of the present application.
Fig. 7 is a schematic cross-sectional structure of a spacer region of a display panel to be cut according to a fourth embodiment of the present application.
Fig. 8 is a top view of a spacer region of a display panel to be cut according to a fifth embodiment of the present application.
Fig. 9 is a schematic cross-sectional structure of a spacer region of a display panel to be cut according to a fifth embodiment of the present application.
Fig. 10 is a top view of a spacer region of a display panel to be cut according to a sixth embodiment of the present application.
Fig. 11 is a schematic structural diagram of a display panel according to a seventh embodiment of the application.
Fig. 12 is a schematic structural diagram of a display device according to an eighth embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Example 1
Referring to fig. 1 to 3, an embodiment of the present application provides a display panel 1 to be cut. As shown in fig. 1, the display panel 1 to be cut has a display area 2 and a non-display area 3 disposed around the display area 2, wherein the non-display area 3 of the display panel 1 to be cut includes a binding area 4 and a to-be-cut area 5 adjacent to the binding area 4, and the display area 2 is located at a side of the binding area 4 away from the to-be-cut area 5. It will be appreciated that the edge of the region to be cut 5 adjacent to the binding region 4 is a cut edge, and the line along which the cut edge is located is a cut line L.
As shown in fig. 1 and 2, the binding region 4 includes a plurality of pad regions 6 arranged at intervals in sequence, and each pad region 6 includes a main body region 7 and an extension region 8 extending from the main body region 7 toward the region 5 to be cut (or the cutting line L); wherein, the distance D1 between the main body area 7 and the area to be cut 5 (or the cutting line L) is greater than or equal to a preset safety distance, and the distance D2 between the extension area 8 and the area to be cut 5 is greater than or equal to 0 and less than the preset safety distance. It will be appreciated that the spacer regions 6 are used to form spacer structures.
It should be noted that the preset safety distance may refer to the safety distance between the pad of the binding area 4 and the cutting line L in the prior art, so as to avoid damaging the metal layer in the pad when the area 5 to be cut is cut.
As shown in fig. 3, the display panel 1 to be cut includes a substrate 14 located at a body region 7 and an extension region 8 of the bonding region, a first insulating layer 9 and a first metal layer 10 located at the body region 7 and the extension region 8 and sequentially stacked on the substrate 14, a second metal layer 11 located at the body region 7 and located between the first insulating layer 9 and the substrate 14, a second insulating layer 12 located at the body region 7 and the extension region 8 and located between the second metal layer 11 and the substrate 14, and a third metal layer 13 located at the body region 7 and located between the second insulating layer 12 and the substrate 14; wherein the first metal layer 10 is electrically connected to the second metal layer 11, and the second metal layer 11 is electrically connected to the third metal layer 13.
It will be appreciated that the third metal layer 13, the second insulating layer 12, the second metal layer 11, the first insulating layer 9 and the first metal layer 10 are stacked in this order from bottom to top on the substrate 14. The substrate 14 may be located throughout the display region 2 and the non-display region 3, the second metal layer 11 and the third metal layer 13 may extend in the direction of the display region 2, and the first insulating layer 9 and the second insulating layer 12 may be further located between adjacent pad regions 6; in the embodiment of the present application, the structure of the pad area 6 is described with emphasis, and the structure of other areas is not described in detail.
In a specific embodiment, the display panel 1 to be cut further includes a buffer layer 15 between the third metal layer 13 and the substrate 14. Of course, other insulating layers, such as a gate insulating layer extending from the display area 2, may be disposed between the buffer layer 15 and the third metal layer 13, which is not limited herein.
Specifically, the stability of the first metal layer 10 is greater than the stability of the second metal layer 11 and the third metal layer 13. Specifically, the material of the first metal layer 10 includes Indium Tin Oxide (ITO), and the material of the second metal layer 11 and the third metal layer 13 includes molybdenum (Mo) or aluminum (Al), or the like.
Specifically, the first metal layer 10, the first insulating layer 9, and the second insulating layer 12 located in the body region 7 and the extension region 8, and the second metal layer 11 and the third metal layer 13 located in the body region 7 together form a pad structure for binding connection with an external circuit board. It can be appreciated that the first metal layer 10 is a surface layer structure of a pad structure, and can be bonded to the circuit board by a conductive adhesive covering the first metal layer 10.
Since the first metal layer 10 is located at the body region 7 and the extension region 8 of the pad region 6, a distance D2 between the first metal layer 10 and the region 5 to be cut is greater than or equal to 0 and less than a preset safety distance. Since the second metal layer 11 and the third metal layer 13 are located in the body region 7 of the pad region 6, a distance D1 between the second metal layer 11 and the third metal layer 13 and the region 5 to be cut is greater than or equal to a preset safety distance.
In a specific embodiment, the distance D1 between the second metal layer 11 and the third metal layer 13 and the cutting line L may be kept to be a preset safety distance, and the first metal layer 10 with higher stability extends towards the direction of the cutting line L relative to the second metal layer 11 and the third metal layer 13, so that the area of the first metal layer 10 may be increased without increasing the cutting risk, thereby increasing the binding contact surface, and being beneficial to improving the binding effect.
In another embodiment, the distance between the first metal layer 10 and the cutting line L may be shortened, and the distance between the second metal layer 11 and the third metal layer 13 and the cutting line L may be increased, so that the distance D2 between the first metal layer 10 and the cutting line L, which are more stable, is smaller than a preset safety distance, and the distance D1 between the second metal layer 11 and the third metal layer 13 and the region 5 to be cut is larger than the preset safety distance. This embodiment is also advantageous for realizing a narrow rim without increasing the risk of cutting.
Specifically, as shown in fig. 2 and 3, a plurality of first through holes 16 penetrating the first insulating layer 9 are provided on the first insulating layer 9 located in the body region 7, and the first metal layer 10 is electrically connected to the second metal layer 11 through the plurality of first through holes 16. The second insulating layer 12 located in the body region 7 is provided with a plurality of third vias 18 penetrating the second insulating layer 12, and the second metal layer 11 is electrically connected to the third metal layer 13 through the plurality of third vias 18. In a specific embodiment, as shown in fig. 2, the distribution areas of the third through holes 18 and the distribution areas of the first through holes 16 do not overlap, which is favorable for forming small concave structures uniformly distributed on the surface of the first metal layer 10, and is favorable for uniformly distributing and firmly combining the conductive adhesive on the surface of the first metal layer 10 during binding, thereby being favorable for improving the binding effect. In a specific embodiment, the distribution density of the first through holes 16 is the same as the distribution density of the third through holes 18, and the aperture of the first through holes 16 is equal to the aperture of the third through holes 18.
It is to be understood that only one distribution positional relationship of the first through holes 16 and the third through holes 18 is shown in fig. 2, and is not limited thereto; and the first through hole 16 and the third through hole 18 are different layer structures.
Specifically, the display panel 1 to be cut further includes a substrate 14 located in the display area 2 and a driving layer (not shown) sequentially disposed on the substrate 14. In a specific embodiment, the driving layer includes a pixel electrode and/or a common electrode and/or a touch electrode disposed in the same layer as the first metal layer 10, a source drain electrode and a data line disposed in the same layer as the second metal layer 11, and a gate electrode and a scan line disposed in the same layer as the third metal layer 13. It will be appreciated that the first insulating layer 9 and the second insulating layer 12 are also located in the display area 2, the first insulating layer 9 may be a flat layer, and the second insulating layer 12 may be an interlayer insulating layer. Of course, the specific film structure of the driving layer depends on the structure of the thin film transistor, and is not limited herein.
Specifically, the display panel 1 to be cut may be a liquid crystal display panel to be cut, or an OLED display panel to be cut, which is not limited herein. When the display panel 1 to be cut is a liquid crystal display panel to be cut, the display panel 1 to be cut further includes a liquid crystal layer and a color film substrate on a side of the driving layer away from the substrate 14; when the display panel 1 to be cut is an OLED display panel to be cut, the display panel 1 to be cut further includes an organic display layer and an encapsulation layer on a side of the driving layer away from the substrate 14.
Specifically, the display panel 1 to be cut may form the display panel to be bound after the region 5 to be cut is cut by the cutting process.
In this embodiment, the pad structure of the binding region 4 is composed of a first metal layer 10, a first insulating layer 9, a second metal layer 11, a second insulating layer 12 and a third metal layer 13 located in the pad region 6, wherein the first metal layer 10 is located in the main body region 7 and the extension region 8 of the pad region 6, the second metal layer 11 and the third metal layer 13 are located only in the main body region 7 of the pad region 6, and the stability of the first metal layer 10 is greater than that of the second metal layer 11 and the third metal layer 13; since the distance D1 between the main body region 7 and the region to be cut 5 is greater than or equal to the preset safety distance, and the distance D2 between the extension region 8 and the region to be cut 5 is greater than or equal to 0 and less than the preset safety distance, the distance between the first metal layer 10 with higher stability and the region to be cut 5 is smaller than that of the conventional structure; because the stability of the first metal layer 10 is strong, properly shortening the distance between the first metal layer 10 and the region 5 to be cut does not increase the cutting risk, and is beneficial to realizing a narrow frame; in addition, the first metal layer 10 extends toward the to-be-cut region 5 relative to the second metal layer 11 and the third metal layer 13, so that the area of the first metal layer 10 is increased, that is, the binding area is increased, which is beneficial to improving the binding effect.
Example two
As shown in fig. 4 and 5, the embodiment of the present application further provides a display panel 1 to be cut, which is different from the previous embodiment in that the third metal layer 13 and the second insulating layer 12 located in the body region 7 of the pad region 6 are hollowed out, so that the pad structure is composed of only the first metal layer 10 and the first insulating layer 9 located in the body region 7 and the extension region 8, and the second metal layer 11 located in the body region 7. That is, in the second embodiment of the present application, the display panel 1 to be cut includes the first insulating layer 9 and the first metal layer 10 located in the body region 7 and the extension region 8 and sequentially disposed on the substrate 14, the second metal layer 11 located in the body region 7 and located between the first insulating layer 9 and the substrate 14, and the second insulating layer 12 located in the extension region 8 and located between the first insulating layer 9 and the substrate 14; the first metal layer 10 is electrically connected with the second metal layer 11, and the stability of the first metal layer 10 is greater than that of the second metal layer 11.
In the first embodiment, since there is no metal layer below the first metal layer 10 of the extension region 8, the height of the first metal layer 10 (i.e. the distance between the first metal layer 10 and the substrate 14) located in the extension region 8 is lower than the height of the first metal layer 10 located in the body region 7, so that the surface of the pad structure is uneven, and there is a risk of affecting the binding effect. According to the embodiment of the application, the third metal layer 13 and the second insulating layer 12 which are positioned in the main body region 7 are removed, and the second insulating layer 12 of the extension region 8 is reserved, so that the height of the first metal layer 10 positioned in the extension region 8 is equivalent to that of the first metal layer 10 positioned in the main body region 7, the surface flatness of the liner structure is improved, and the binding effect can be effectively improved.
It will be appreciated that when the thickness of the second insulating layer 12 is the same as the thickness of the second metal layer 11, the height of the first metal layer 10 located in the extension region 8 is the same as the height of the first metal layer 10 located in the body region 7; when there is a difference in thickness between the thickness of the second insulating layer 12 and the thickness of the second metal layer 11, the difference in height between the first metal layer 10 located in the extension region 8 and the first metal layer 10 located in the body region 7 is equal to the difference in thickness, but the difference in height between the extension region 8 and the first metal layer 10 of the body region 7 can be effectively reduced as compared with the first embodiment.
Example III
As shown in fig. 6, the embodiment of the present application further provides a display panel 1 to be cut, which is different from the previous embodiment in that the display panel 1 to be cut further includes a filler metal layer 19 located in the extension region 8 and located between the first insulating layer 9 and the substrate 14 (or the buffer layer 15); the filling metal layer 19 is insulated from the second metal layer 11, and the stability of the filling metal layer 19 is greater than that of the second metal layer 11.
Specifically, the filling metal layer 19 may be disposed in the same layer as the second metal layer 11 or in the same layer as the third metal layer 13, and the thickness of the filling metal layer 19 is equal to the sum of the thicknesses of the second metal layer 11 and the third metal layer 13, so as to compensate the height difference between the first metal layer 10 located in the main body region 7 and the first metal layer 10 located in the extension region 8, and improve the surface flatness of the pad structure, thereby improving the binding effect.
Specifically, the material of the filling metal layer 19 may be the same as that of the first metal layer 10, for example, indium tin oxide.
Example IV
As shown in fig. 7, the embodiment of the present application further provides a display panel 1 to be cut, which is different from the second embodiment in that the display panel 1 to be cut further includes a filler metal layer 19 located in the extension region 8 and located between the first insulating layer 9 and the second insulating layer 12; the filling metal layer 19 is insulated from the second metal layer 11, and the stability of the filling metal layer 19 is greater than that of the second metal layer 11.
Specifically, the sum of the thicknesses of the filling metal layer 19 and the second insulating layer 12 in the extension region 8 is equal to the thickness of the second metal layer 11, so that the height of the first metal layer 10 in the extension region 8 is equal to the height of the first metal layer 10 in the body region 7, and the surface flatness of the pad structure can be effectively improved, thereby effectively improving the binding effect.
Specifically, the material of the filling metal layer 19 may be the same as that of the first metal layer 10, for example, indium tin oxide.
Example five
As shown in fig. 8 and 9, the embodiment of the present application further provides a display panel 1 to be cut, which is different from any one of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, in that a plurality of second through holes 17 are provided on the first insulating layer 9 located in the extension region 8, and the first metal layer 10 is further located in the second through holes 17.
It should be noted that, in the embodiment of the present application, only fig. 9 (modified based on the second embodiment) is taken as an example for illustration, and the second through hole 17 in the embodiment of the present application may be provided based on the first embodiment, the third embodiment, or the fourth embodiment.
In a specific embodiment, the apertures of the first through holes 16 and the second through holes 17 are the same, and the distribution density of the first through holes 16 and the distribution density of the second through holes 17 are the same.
Since the first insulating layer 9 of the body region 7 is provided with a plurality of first through holes 16 (for example, first to fourth embodiments), and the second insulating layer 12 is provided with a plurality of third through holes 18 (for example, first embodiment), small recess structures are formed at positions of the first metal layer 10 corresponding to the first through holes 16 and the third through holes 18, which is beneficial to improving the binding effect. In the embodiment of the application, the second through holes 17 with the same aperture and distribution density as the first through holes 16 are arranged on the first insulating layer 9 of the extension region 8, so that the position of the first metal layer 10 positioned in the extension region 8 corresponding to the second through holes 17 is also provided with a small concave structure, the surface structures of the first metal layer 10 positioned in the extension region 8 and the main body region 7 are the same, the uniformity is improved, and the binding effect is improved.
Example six
As shown in fig. 10, the embodiment of the present application further provides a display panel 1 to be cut, which is different from any one of the first, second, third, fourth and fifth embodiments in that the width of at least a portion of the extension region 8 near the region 5 to be cut is smaller than the width of the main body region 7. It should be noted that fig. 10 is only an exemplary illustration.
In one embodiment, the width of the entire extension 8 is narrowed; in another embodiment, only the part of the extension 8 near the region 5 to be cut narrows in width. Specifically, one side of each extension region 8 may be hollowed out to achieve the extension region 8 narrowing, and both sides of each extension region 8 may be hollowed out to achieve the extension region 8 narrowing.
Because the distance between the extension region 8 and the region 5 to be cut is relatively short, if the distance between the first metal layers 10 of adjacent extension regions 8 is too short, risks such as short circuits are likely to occur when the region 5 to be cut is cut, and the width of the extension region 8 is narrowed in the embodiment of the application, so that the distance between the first metal layers 10 of adjacent extension regions 8 is increased, and short circuits caused during cutting are avoided.
Example seven
As shown in fig. 11, the embodiment of the present application further provides a display panel 20, where the display panel 20 includes the structure of the display panel 1 to be cut after the to-be-cut area 5 is cut according to any one of the foregoing embodiments.
It can be understood that the display panel 20 in this embodiment does not have a region to be cut, and other structures refer to the description in the foregoing embodiments, and are not repeated here.
In the display panel 20 provided in this embodiment, compared with the conventional structure, the distance between the first metal layer 10 with higher stability and the edge of the cutting line is reduced; because the stability of the first metal layer 10 is strong, properly shortening the distance between the first metal layer 10 and the cutting edge does not increase the cutting risk, and is beneficial to realizing a narrow frame; in addition, the first metal layer 10 extends toward the cutting line edge relative to the second metal layer 11 and the third metal layer 13, so that the area of the first metal layer 10 is increased, that is, the binding area is increased, which is beneficial to improving the binding effect.
Example eight
As shown in fig. 11 and 12, the embodiment of the present application further provides a display device 21, including the display panel 20 and the circuit board 22 described in the seventh embodiment; wherein the circuit board 22 is bonded to the first metal layer at the bonding region 4.
Specifically, the circuit board 22 may be a flexible circuit board (Free Pascal Compiler, FPC) or a Chip On Film (COF).
Specifically, the circuit board 22 and the first metal layer of the bonding region are bonded by a conductive adhesive (e.g., ACF adhesive).
In this embodiment, compared with the conventional structure, the distance between the first metal layer with higher stability and the cutting edge becomes smaller; because the stability of the first metal layer is strong, the cutting risk is not increased by properly shortening the distance between the first metal layer and the cutting edge, and the narrow frame is realized; in addition, the first metal layer extends towards the cutting edge relative to the second metal layer and the third metal layer, so that the area of the first metal layer is increased, namely the binding area is increased, and the binding effect is improved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display panel to be cut, the display panel and the display device provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. The display panel to be cut is characterized by comprising a binding area and a region to be cut, wherein the region to be cut is adjacent to the binding area; the binding area comprises a plurality of pad areas which are sequentially arranged at intervals; each pad region includes a body region and an extension region extending from the body region toward the region to be cut;
the display panel to be cut comprises a substrate positioned in the binding area, a first insulating layer and a first metal layer which are positioned in the main body area and the extension area and are sequentially arranged on the substrate, and a second metal layer which is positioned in the main body area and is positioned between the substrate and the first insulating layer; the first metal layer is electrically connected with the second metal layer, and the stability of the first metal layer is greater than that of the second metal layer;
the distance between the main body area and the area to be cut is larger than or equal to a preset safety distance, and the distance between the extension area and the area to be cut is larger than or equal to 0 and smaller than the preset safety distance; and the width of at least a part of the extension area, which is close to the area to be cut, is smaller than that of the main body area.
2. The display panel to be cut of claim 1, further comprising a second insulating layer located at the extension region and between the first insulating layer and the substrate.
3. The display panel to be cut according to claim 1, further comprising a second insulating layer located at the body region and the extension region and at a side of the second metal layer away from the first insulating layer, and a third metal layer located at the body region and between the second insulating layer and the substrate;
the second metal layer is electrically connected with the third metal layer.
4. The display panel to be cut of claim 1, further comprising a filler metal layer located in the extension region and between the first insulating layer and the substrate; the filling metal layer is arranged in an insulating manner with the second metal layer, and the stability of the filling metal layer is greater than that of the second metal layer.
5. The display panel to be cut according to claim 1, wherein a plurality of first through holes are provided on the first insulating layer located in the body region, and the first metal layer is electrically connected to the second metal layer through the plurality of first through holes;
and a plurality of second through holes are formed in the first insulating layer located in the extension region, and the first metal layer is also located in the second through holes.
6. The display panel to be cut according to claim 5, wherein the first through holes and the second through holes have the same pore diameters, and the distribution density of the first through holes and the distribution density of the second through holes are the same.
7. The display panel to be cut according to claim 1, wherein the material of the first metal layer comprises indium tin oxide and the material of the second metal layer comprises any one of molybdenum and aluminum.
8. A display panel comprising the structure of the display panel to be cut according to any one of claims 1 to 7 after the display panel to be cut is cut in the area to be cut.
9. A display device comprising the display panel of claim 8 and a circuit board; the circuit board is in binding connection with the first metal layer located in the binding area.
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| CN202210102963.7A CN114460773B (en) | 2022-01-27 | 2022-01-27 | Display panel to be cut, display panel and display device |
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| CN202210102963.7A CN114460773B (en) | 2022-01-27 | 2022-01-27 | Display panel to be cut, display panel and display device |
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| CN114460773A (en) | 2022-05-10 |
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