Patent Description:
The statements herein are intended for the mere purpose of providing background information related to the present invention and do not necessarily constitute prior art.

A display panel typically includes an array substrate and a color filter substrate. The array substrate and the color filter substrate are sealed by a sealant and bonded to form the display panel. Since the inside of the box is sealed, it is difficult to be corroded by water vapor, but the wirings formed outside the sealant may be corroded by water vapor. The array substrate typically adopts the design of bridging structures to realize the electrode connection between different metal layers, and so it is needed to form multiple bridging structures on the array substrate. Some of the bridging structures are located outside the sealant and are easily corroded by water vapor. There are also some bridging structures that are located under the sealant, and because the sealant needs adhesion, a waterproof layer cannot be disposed under the sealant. Therefore, the bridging structures under the sealant can be easily corroded by the entry of moisture.

Relevant background art useful for understanding the invention, according to Rule <NUM>(<NUM>)(b) EPC include: <CIT>, <CIT>, <CIT> and <CIT> which concern corrosion of electrical bridging portions in the non-display area of a display substrate.

It is therefore a purpose of the present invention to provide a display panel and a display device, which can improve the corrosion resistance of the bridging structures disposed in the non-display area of the display panel.

The present invention discloses a display panel, which is divided into a display area and a non-display area. The display panel includes a first substrate and a second substrate opposite to the first substrate. A sealant is arranged between the first substrate and the second substrate, and the sealant is arranged in the non-display area. The first substrate includes a first metal layer, a second metal layer and a conductive layer which are arranged in sequence corresponding to the non-display area. The first metal layer and the second metal layer are insulated from each other, and the second metal layer and the conductive layer are insulated from each other. In the first metal layer is formed a first metal wire group, and in the second metal layer is formed a second metal wire group. The first metal wire group includes at least one sub-wire, and the second metal wire group includes at least one sub-connection wire. The sub-wires of the first metal wire group and the sub-connection wires of the second metal wire group are connected in a one-to-one correspondence through a set of bridging structures, where the set of bridging structures includes at least one bridging structure. The side of the sealant close to the display area is an inside of the sealant, and the side of the sealant away from the display area is an outside of the sealant. All the bridging structures are arranged in the direction of the outer edge of the sealant facing the display area. In a group of the bridging structures, the bridging structure closest to the outer edge of the sealant is the outermost bridging structure, and the distance between the outermost bridging structure and the outer edge of the sealant is at least <NUM>.

The present invention further discloses a display panel, which is divided into a display area and a non-display area. The display panel includes an array substrate, and a color filter substrate opposite to the array substrate. A sealant is arranged between the array substrate and the color filter substrate, and the sealant is arranged in the non-display area. The array substrate includes a substrate, a first metal layer, a first insulating layer, a second metal layer, a second insulating layer, and a conductive layer that are stacked in sequence corresponding to the non-display area. Two adjacent edges of the first substrate extend along a first direction and a second direction respectively, where the first direction and the second direction are perpendicular to each other. The routing direction of the first metal wire group is parallel to the first direction, and the routing direction of the second metal wire group is parallel to the second direction.

In the first metal layer is formed n sub-wires, and in the second metal layer is formed n sub-connection wires and at least one branch wire. A group of bridging structures are disposed in one-to-one correspondence between the plurality of sub-wires and the plurality of sub-connection wires. The conductive layer connects the sub-wires and the sub-connection wires through the corresponding bridging structures. The bridging structure is arranged on the sub-wire.

Of the n sub-wires, the sub-wire closest to the outer edge of the sealant is the first sub-wire, and in the direction of nearing the display area from the outside of the sealant, the order in which the sub-wires are arranged are sequentially the first sub-wire, the second sub-wire,. , and the nth sub-wire. Of the n sub-connection wires, the ones that are connected to the first sub-wire, the second sub-wire,. , and the nth sub-wire are respectively the first sub-connection wire, the second sub-connection wire,. , and the nth sub-connection wire. The bridging structure connecting the first sub-wire and the first sub-connection wire is the first bridging structure, followed by the second bridging structure,. , and the nth bridging structure.

The branch wire includes a first branch wire and a second branch wire. The first branch wire includes a first horizontal branch wire parallel to the first direction and a first vertical branch wire parallel to the second direction, wherein the first horizontal branch wire and the first vertical branch wire are connected to each other. The second branch wire includes a second horizontal branch wire parallel to the first direction. The first horizontal branch wire is perpendicular to the first vertical branch wire, and the first horizontal branch wire is parallel to the second horizontal branch wire. The first bridging structure is arranged on the first vertical branch wire, and the first bridging structure connects the first vertical branch wire with the first sub-wire. The first vertical branch wire is sequentially connected to the first horizontal branch wire with the first sub-connection wire. The second bridging structure is arranged on the second horizontal branch wire, and the second bridging structure connects the second horizontal branch wire and the second sub-wire. The second horizontal branch wire is connected to the second sub-connection wire.

The sealant is in the shape of an annular square or rectangle, and is divided into a linear area and a corner area. The linear area includes a first linear area parallel to the first direction and a second linear area parallel to the second direction. The first linear area and the second linear area are connected by a corner area. The sealant in each of the first linear area and the second linear area is a linear segment, and the sealant in the corner area is a curved segment.

The junction of the first horizontal branch wire and the first sub-connection wire is disposed under the sealant in the corner area, and the distance between the junction and the outer edge of the sealant is less than <NUM>. The junction of the second horizontal branch wire and the second sub-connection wire is disposed under the sealant in the corner area, and the distance from the junction of the second horizontal branch wire and the second sub-connection wire to the outer edge of the sealant is less than <NUM>. The first bridging structure is disposed under the sealant of the linear area. The distance between each of all bridging structures and the outer edge of the sealant is at least <NUM>.

The present invention further discloses a display device, comprising a display panel and a backlight module configured for providing a light source for the display panel,
the display panel includes:.

Compared with the exemplary solution of arranging a protective layer on the via hole, the present invention moves the bridging structure of the non-display area to the inside of the sealant, and at least <NUM> from the outer edge of the sealant to prevent water vapor from corroding from the edge of the sealant to the bridging structure. Not only can the process of manufacturing the protective layer be saved, but also the bridging structure can be protected from being corroded by external water vapor.

The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention, constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the written description, serve to explain the principles of the present invention. Obviously, the drawings used in the following description merely depict some embodiments of the present invention, and for those having ordinary skill in the art, other drawings can also be obtained from these drawings without investing creative effort. In the drawings:.

It should be understood that the terminology used herein, the specific structural and functional details disclosed are intended for the mere purpose of describing specific embodiments and are representative, but the present invention may be embodied in many alternative forms and should not be construed as limited only the embodiments set forth herein.

In the description of this invention, the terms "first" and "second" are merely used for description purposes, and cannot be understood as indicating relative importance, or implicitly indicating the number of indicated technical features. Thus, unless otherwise specified, features defined as "first" and "second" may expressly or implicitly include one or more of the features; "plurality" means two or more. The terms "including", "comprising", and any variations thereof are intended to mean a non-exclusive inclusion, namely one or more other features, integers, steps, operations, units, components and/or combinations thereof may be present or added.

In addition, terms such as "center", "transverse", "lateral", "above", "on", "under", "below", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicative of orientations or positional relationships are described based on the orientations or relative positional relationships illustrated in the drawings, and are intended for the mere purpose of convenience of simplified description of the present invention, rather than indicating that the device or element referred to must have a specific orientation or be constructed, and operate in a particular orientation. Thus, these terms should not be construed as limiting the present invention.

In addition, unless otherwise expressly specified and defined, terms "installed on", "connected to", and "coupled to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, or may also be an electrical connection; it may be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those having ordinary skill in the art, the specific meanings of the above terms in this invention can be understood depending on specific contexts.

The present invention will be described in detail below with reference to the accompanying drawings and optional embodiments.

<FIG> discloses a display panel <NUM>. The display panel <NUM> includes a first substrate <NUM> and a second substrate <NUM> aligned and bonded together to form a cell. The first substrate <NUM> is divided into a display area <NUM> and a non-display area <NUM>. A sealant <NUM> is disposed between the first substrate <NUM> and the second substrate <NUM>, and the sealant <NUM> is disposed in the non-display area <NUM>.

<FIG> discloses a schematic diagram of the first substrate <NUM>. The array substrate <NUM> includes a substrate <NUM>, a first metal layer <NUM>, a first insulating layer <NUM>, a second metal layer <NUM>, a second insulating layer <NUM>, and a conductive layer <NUM> which are stacked in sequence corresponding to the non-display area <NUM>. Specifically, it is shown that the first metal wire group <NUM> and the second metal wire group <NUM> are connected through the bridging structure <NUM> and the conductive layer <NUM>. The first substrate <NUM> includes a first metal layer <NUM> and a second metal layer <NUM> disposed corresponding to the non-display area <NUM>, where the first metal layer <NUM> and the second metal layer <NUM> are insulated from each other. In the first metal layer <NUM> is formed a first metal wire group <NUM>, and in the second metal layer <NUM> is formed a second metal wire group <NUM>. The first metal wire group <NUM> and the second metal wire group <NUM> are connected in a one-to-one correspondence through a set of bridging structures <NUM>. The first metal layer <NUM> and the second metal layer <NUM> in the present invention belong to the same layer as the first metal layer <NUM> and the second metal layer <NUM> in the display area <NUM> of the display panel <NUM>. The first substrate <NUM> in this invention is an array substrate <NUM>, and the second substrate <NUM> is a color filter substrate <NUM>. It should be noted that the first metal wire group <NUM> in the present invention, that is, the sub-wires <NUM>, are the peripheral traces of the non-display area <NUM>, and provide driving signal voltages (e.g., VGH, VGL, CLK, VCOM, etc.) for the display panel <NUM>). The second metal trace group <NUM> of the present invention, that is, the sub-connection wires <NUM> are electrostatic discharge traces (ESD traces), which transfer the static electricity of the peripheral traces in the non-display area <NUM> to the outside of the display panel <NUM> through the bridging structure <NUM> to avoid the failure of the peripheral traces of the non-display area <NUM> due to ESD.

<FIG> shows a schematic diagram of the positions of the bridging structure <NUM> and the sealant <NUM>. The side of the sealant <NUM> adjacent to the display area <NUM> is the inside of the sealant <NUM>, and the side of the sealant <NUM> away from the display area <NUM> is the outside of the sealant <NUM>. All the bridging structures <NUM> are disposed in the direction of the outer edge <NUM> of the sealant facing the display area <NUM>. In the group of the bridging structures <NUM>, the bridging structure <NUM> closest to the outer edge <NUM> of the sealant is the outermost bridging structure <NUM>, and the distance between the outermost bridging structure <NUM> and the outer edge <NUM> of the sealant is at least <NUM>.

The inventor of the present invention found that the bridging structure <NUM> of the non-display area <NUM> is easily corroded by external water vapor due to its proximity to the outside of the display panel <NUM>, thereby causing problems such as disconnection. Compared with the exemplary solution of arranging a protective layer on the via hole, the present invention moves the bridging structure <NUM> of the non-display area <NUM> to the inside of the sealant <NUM>, and at least <NUM> from the outer edge of the sealant <NUM> to prevent water vapor from corroding from the edge of the sealant <NUM> to the bridging structure <NUM>. Not only can the process of manufacturing the protective layer be saved, but also the bridging structure <NUM> can be protected from being corroded by external water vapor, thereby improving the corrosion resistance of the display panel <NUM> and improving the service life of the display panel <NUM>.

<FIG> shows a graph illustrating the change of the corrosion degree as a function of time under different distances between the outermost bridging structure <NUM> and the edge of the sealant outer <NUM>. In the figure, w refers to the length of the outermost bridging structure <NUM> from the edge of the sealant outside <NUM>, the abscissa in the figure is the reliability time (the unit is hour), and the ordinate is the resistance value of the outermost bridging structure <NUM>. Since the phenomenon after the bridging structure <NUM> is corroded is that the resistance increases, the ordinate in this figure is the resistance value of the outermost bridging structure <NUM> to indicate the degree of corrosion. In connection with Table <NUM>, Table <NUM> corresponds to the values of each point of the curve in <FIG>, indicating the specific values of the abscissa and ordinate. The experimental conditions in <FIG> and Table <NUM> are: in a reliable environment of <NUM> degrees Celsius and <NUM>% humidity. Table <NUM> is as follows: It should be noted that other variables are controlled in this invention to be consistent, such as the aperture size and other factors as the default aperture, so that the distance W in this experiment is the single variable.

It can be seen from Table <NUM> that when w=<NUM>, the resistance of the outermost bridging structure <NUM> changes from <NUM>. 2Ω to <NUM>. 9Ω during the period from <NUM> hours to <NUM> hours, and during the period from <NUM> hours to <NUM> hours, the resistance of the outermost bridging structure <NUM> has abruptly changed from <NUM> ohms to <NUM> ohms. It can be seen that in the second <NUM>-hour change, the resistance of the outermost bridging structure <NUM> has increased to <NUM> times, and in the process from <NUM> hours to <NUM> hours, the resistance of the outermost bridging structure <NUM> has reached <NUM> ohm, so that at the time of <NUM> hours, the resistance of the outermost bridging structure <NUM> has risen to <NUM>. 3KΩ, indicating that the resistance of the first bridging structure <NUM> changes greatly. At <NUM> hours, the outermost bridging structure <NUM> is completely corroded. Similarly, in the cases of w=<NUM> and <NUM>, the resistance of the outermost bridging structure <NUM> reaches more than <NUM> kilo ohm in the time of <NUM> hours in each case, indicating that the resistance of the first bridging structure <NUM> changes greatly. It shows that in cases where the w is small, the outermost bridging structure <NUM> can be easily corroded.

Taking w=<NUM> as an example, in the process from <NUM> hours to <NUM> hours, the resistance value of the outermost bridging structure <NUM> only increases from <NUM> ohms to <NUM> ohms. When the experimental conditions are converted into the temperature and humidity of the normal environment, the experimental data of <NUM> hours can be converted into a service life of at least <NUM> years. Thus, a <NUM>-year warranty can be achieved, and it is closer to the outer edge <NUM> of the sealant, which makes the internal wiring space larger and the external space narrower, which is suitable for the display panel <NUM> with a narrow bezel.

In Table <NUM> above, when w=<NUM>, in the period of <NUM> hours to <NUM> hours, the resistance value of the outermost bridging structure <NUM> increases from <NUM> ohms to <NUM>. 51KΩ, indicating that the resistance of the first bridging structure <NUM> still changes greatly. It can be seen that in the case of w=<NUM>, the outermost bridging structure <NUM> still has a certain risk of being corroded. Although the corrosion risk can be resisted for a certain period of time, a very low corrosion risk value cannot be achieved, and the resistance of the outermost bridging structure <NUM> will still rise to a significantly large value within a long enough period of time.

Taking w=<NUM> as an example, in the process of <NUM> hours to <NUM> hours, the resistance value of the outermost bridging structure <NUM> only increases from <NUM> ohms to <NUM> ohms, and in the process of <NUM> hours to <NUM> hours, the resistance of the outermost bridging structure <NUM> value rises from <NUM> ohms to <NUM> ohms. It can be seen that, in the change curve from <NUM> hour to <NUM> hours, the slope value of the curve changes little, indicating that the resistance of the first bridging structure <NUM> changes little, and it is further shown that in the case of w=<NUM>, the risk of corrosion of the outermost bridging structure <NUM> is extremely small. Even for a long enough period of time, the resistance value of the outermost bridging structure <NUM> does not rise to a high level, which has the effect of preventing corrosion of the outermost bridging structure <NUM>.

In the case of w=<NUM> or <NUM>, the resistance value of the outermost bridging structure <NUM> only changes from <NUM> ohms to <NUM> ohms during the experiment from <NUM> hours to <NUM> hours, meaning it is hardly changed, indicating that in the case of w ≧ <NUM>, the outermost bridging structure <NUM> is basically not corroded, which greatly ensures the service life of some display panels <NUM> that need to operate in high humidity and high temperature conditions.

It can be seen from the experimental data that the larger the value of w is, the farther the outermost bridging structure <NUM> is from the outer edge <NUM> of the sealant, that is, the closer the outermost bridging structure <NUM> is to the display area <NUM>, and the corrosion resistance is significantly improved. However, due to the limited wiring space of the display panel <NUM>, the value of w cannot be infinitely large. Generally, the width of the sealant <NUM> is in the range of <NUM>-<NUM>. When the value of w is less than <NUM>, the internal wiring space meet the requirements, and the wiring spaces of the display area <NUM> and the area where the edge of the inner side <NUM> of the sealant faces the display area <NUM> will not be compromised. Therefore, in the case where the distance between the outermost bridging structure <NUM> and the outer edge <NUM> of the sealant is <NUM>-<NUM> in the present invention, the display panel <NUM> can have better anti-corrosion ability under high humidity and high temperature conditions, can be used for a long time and has a long service life. For a narrow bezel display panel <NUM> with a narrow bezel <NUM>, for example, the width of the sealant <NUM> is <NUM>-<NUM>, when the value of w is less than <NUM>, it can ensure that other bridging structures <NUM> have a certain space for arrangement.

Specifically, the outermost bridging structure <NUM> is connected to the sub-wire <NUM> closest to the outer side <NUM> of the sealant, and the distance between the sub-wire <NUM> closest to the outer side <NUM> of the sealant and the outer edge <NUM> of the sealant is greater than <NUM>. By ensuring that the distance between the outermost sub-wire <NUM> and the outer edge <NUM> of the sealant is greater than <NUM>, the distance between the outermost bridging structure <NUM> at the corresponding sub-connection wire <NUM> and the outer edge <NUM> of the sealant can be greater than <NUM>.

However, due to the influence of other wirings at the side of the outer edge <NUM> of the sealant facing the display area <NUM>, the first metal wire group <NUM> and the second metal wire group <NUM> cannot be arranged in an area closer to the display area <NUM>. They can only be arranged near the edge of the first substrate <NUM>. Furthermore, on the basis of pursuing a narrow-bezel display panel <NUM>, the distance of the sealant <NUM> from the first substrate <NUM> is even shorter, so that the wiring area of the non-display area <NUM> is narrower, and the distance of the outermost bridging structure <NUM> from the outer edge <NUM> of the sealant cannot be designed to be at least <NUM>.

In connection with <FIG> and <FIG>, as another embodiment of the present invention, the present invention discloses another first substrate <NUM>. The first substrate <NUM> is divided into a display area <NUM> and a non-display area <NUM>. The non-display area <NUM> of the first substrate <NUM> includes a substrate <NUM>, a first metal layer <NUM>, a first insulating layer <NUM>, a second metal layer <NUM>, a second insulating layer <NUM>, a conductive layer <NUM>, and a sealant <NUM>, which are sequentially stacked. A first metal wire group <NUM> is formed in the first metal layer <NUM>, and a second metal wire group <NUM> is formed in the second metal layer <NUM>. The first metal wire group <NUM> and the second metal wire group <NUM> are connected in a one-to-one correspondence through a set of bridging structures <NUM>. In <FIG>, two adjacent edges of the first substrate extend along the first direction <NUM> and the second direction <NUM> respectively. That is, the first substrate <NUM> includes the two sides arranged horizontally in the direction of the first direction <NUM>, and two sides arranged vertically in the direction of the second direction <NUM>, wherein the first direction <NUM> is perpendicular to the second direction <NUM>. The routing direction of the first metal wire group <NUM> is parallel to the first direction <NUM>, and the routing direction of the second metal wire group <NUM> is parallel to the second direction <NUM>. The side of the sealant <NUM> adjacent to the display area <NUM> is the edge of the inner side <NUM> of the sealant, and the side of the sealant <NUM> away from the display area <NUM> is the outer edge <NUM> of the sealant. All the bridging structures <NUM> are located on the side from the outer edge <NUM> of the sealant toward the display area <NUM>. The first metal wire group <NUM> is located on the side of the outer side <NUM> of the sealant facing the display area <NUM>, and the second metal wire group <NUM> is located on the side of the outer side <NUM> of the sealant facing the display area <NUM>.

The first metal wire group <NUM> includes a plurality of sub-wires <NUM> arranged in parallel, and the second metal wire group <NUM> includes a plurality of sub-connection wires <NUM> and at least one branch wire <NUM> arranged in parallel. The set of bridging structures <NUM> includes at least one direct-connecting bridging structure <NUM> and at least one transition bridging structure <NUM>. The direct-connecting bridging structure <NUM> is disposed on the sub-connection wire <NUM>. The direct-connecting bridging structure <NUM> directly connects the sub-wire <NUM> and the sub-connection wire <NUM>. The transition bridging structures <NUM> are arranged on the branch wires <NUM> in one-to-one correspondence. The transition bridging structure <NUM> connects the branch wire <NUM> and the sub-wire <NUM>. The branch wire <NUM> is connected to the sub-connection wire <NUM>. The number of the transition bridging structures <NUM> is equal to the number of the branch wires <NUM>. The routing direction of the branch wire <NUM> and the routing direction of the sub-connection wire <NUM> are not in the same linear direction. The branch wire <NUM> and the sub-connection wire <NUM> are arranged on the same layer and are connected to each other. The distance between the direct-connecting bridging structure <NUM> and the outer edge <NUM> of the sealant is at least <NUM>, and the distance between the transition bridging structure <NUM> and the outer edge <NUM> of the sealant is at least <NUM>. The junction of the branch wire <NUM> and the sub-connection wire <NUM> is disposed under the sealant <NUM> of the corner area <NUM>, and the distance from the junction of the branch wire <NUM> and the sub-connection wire <NUM> to the outer edge <NUM> of the sealant is less than <NUM>.

Due to the close distance from the bridging structure <NUM> near the outer side <NUM> of the sealant to the outer edge <NUM> of the sealant, some bridging structures <NUM> cannot meet the condition that their distance from the outer edge <NUM> of the sealant reaches <NUM>. In this solution, the position of the corresponding bridging structure <NUM> is changed by means of the branch wire <NUM>, so that the distance between the corresponding bridging structure <NUM> and the outer edge <NUM> of the sealant reaches <NUM>, which has a better anti-corrosion effect. It can be seen from <FIG> that if the solution does not use the branch wire <NUM> for transiting, then the distance between the outermost bridging structure <NUM> and the outer edge <NUM> of the sealant is difficult to achieve more than <NUM>.

<FIG> is a schematic diagram of the bridging structures <NUM> and the corner area <NUM> of the sealant <NUM>. The sealant <NUM> is in the shape of an annular square or rectangle, is arranged around the display area <NUM>, and can be divided into a linear area <NUM> and a corner area <NUM>. The linear area <NUM> includes a first linear area <NUM> parallel to the first direction <NUM> and a second linear area <NUM> parallel to the second direction <NUM>. The first linear area <NUM> and the second linear area <NUM> are connected by a corner area <NUM>. The sealant <NUM> in each of the first linear area <NUM> and the second linear area <NUM> is a linear segment, and the sealant <NUM> in the corner area <NUM> is a curved segment. Some of the bridging structures <NUM> are located under the sealant <NUM> of the corner area <NUM>. The junction of the branch wire <NUM> and the sub-connection wire <NUM> is located under the sealant <NUM> in the corner area <NUM>, and the distance between the junction and the outer edge <NUM> of the sealant is less than <NUM>.

Because the signal lines can be arranged along the edge corners at the corners of the display panel <NUM>, where the angle at the corners can be relatively larger, even <NUM>°. However, for the position of the sealant <NUM>, due to the influence of the gluing process, the corner of the sealant <NUM> cannot be <NUM>°, but an arc. Therefore, the signal lines in the corner area <NUM> are relatively closer to the frame outside the sealant <NUM>, and even beyond the coverage area of the sealant <NUM>. When it again comes to the linear area <NUM>, however, the signal lines return to the coverage area of the sealant <NUM> again. Therefore, the junction of the sub-wire <NUM> and the connecting wire may be located outside the sealant <NUM> or at the corner area <NUM> of the sealant <NUM>, while the junction of the first sub-wire <NUM> on the outer side and the first sub-connection wire <NUM> may be located outside the sealant <NUM>. However, by moving the transition bridging structure <NUM> moved toward the linear area <NUM> of the sealant <NUM> through the branch wire <NUM>, the length of the transition bridging structure <NUM> from the outer edge <NUM> of the sealant can be made greater than <NUM>.

The bridging structure <NUM> that needs to use the branch wire <NUM> for transition is typically the bridging structure <NUM> corresponding to the sub-wire <NUM> closest to the outer edge <NUM> of the sealant, namely the outermost bridging structure <NUM> is the transition bridging structure <NUM>. The sub-wire <NUM> closest to the outer edge <NUM> of the sealant is the first sub-wire <NUM>; the distance between the transition bridging structure <NUM> and the adjacent bridging structure <NUM> is greater than <NUM>. For example, <FIG> shows a schematic diagram of a curve where the abscissa is time, the ordinate is the resistance of the bridging structures <NUM> in cases of different distances between adjacent bridging structures <NUM>, where the corrosion test conditions are: the temperature is <NUM> degrees Celsius, the humidity is <NUM>%. From the curve in the figure, the closer the distance between the two bridging structures <NUM> is, when one bridging structure <NUM> is corroded, the resistance of the adjacent bridging structures <NUM> will become larger and larger in a certain period of time, which indicates that the adjacent bridging structure <NUM> is corroded. That is, when a bridging structure <NUM> corrodes, it is easy to continue to deteriorate along the direction of the metal traces, destroying the adjacent bridging structures <NUM> and causing corrosion. Correspondingly, when the adjacent distance is <NUM> or more, when one bridging structure <NUM> is corroded, the resistance of the adjacent bridging structure <NUM> changes little, indicating that when the adjacent bridging structure <NUM> is separated by <NUM>, the adjacent bridging structure <NUM> is not easily affected and corroded. The specific data corresponding to the horizontal and vertical coordinates can be found in Table <NUM> below.

<FIG> shows another connection mode of the branch wire <NUM>, where the branch wire <NUM> includes a first horizontal branch wire <NUM> and a first vertical branch wire <NUM> that are connected to each other. The first horizontal branch wire <NUM> is perpendicular to the first vertical branch wire <NUM>. The transition bridging structure <NUM> is disposed on the first vertical branch wire <NUM>, and the transition bridging structure <NUM> connects the first vertical branch wire <NUM> with the sub-connection wire <NUM>. The first vertical branch wire <NUM> is sequentially connected to the first horizontal branch wire <NUM> and the sub-connection wire <NUM>. The junction of the first horizontal branch wire <NUM> and the sub-connection wire <NUM> is located under the sealant <NUM> in the corner area <NUM>, and the distance between the junction and the outer edge <NUM> of the sealant is less than <NUM>.

When the turning arc of the sealant <NUM> in the corner area <NUM> has a small curvature so that the distance from the edge of the sealant outside <NUM> needs to be made less than <NUM>, the branch wire <NUM> is used to move it to the area that meets the <NUM> requirement. The distance between the transition bridging structure <NUM> and the adjacent bridging structure <NUM> is greater than <NUM>. Thus, the first vertical branch wire <NUM> and the first horizontal branch wire <NUM> cooperate with each other, so that the outermost bridging structure <NUM> can satisfy the above conditions of <NUM> and <NUM>.

As illustrated in <FIG>, the first metal wire group <NUM> includes n parallel sub-wires <NUM>, and the second metal wire group <NUM> includes n parallel sub-connection wires <NUM> and two branch wires <NUM>.

Among the n sub-wires <NUM>, the one closest to the outer edge <NUM> of the sealant is the first sub-wire <NUM>, and in the order of nearing the display area <NUM> from the position closest to the outer edge <NUM> of the sealant, the sub-wires <NUM> are sequentially the first sub-wire, the second sub-wire,. and the n-th sub-wire. Among the n sub-connection wires, the ones connected to the first sub-wire, the second sub-wire,. , and the nth sub-wire are respectively the first sub-connection wire, the second sub-connection wire,. , and the nth sub-connection wire. The bridging structures connecting the first sub-wires and the first sub-connection wires are the first bridging structures, which in turn are the second bridging structure,. , and the nth bridging structure. The first bridging structure and the second bridging structure are the transition bridging structures. The third bridging structure, the fourth bridging structure,. , and the nth bridging structure are the direct-connecting bridging structures.

The corresponding branch wire <NUM> on which the first bridging structure <NUM> is disposed is the first branch wire <NUM>, and the corresponding branch wire <NUM> on which the second bridging structure <NUM> is disposed is the second branch wire <NUM>. The first branch wire <NUM> includes a first horizontal branch wire <NUM> and a first vertical branch wire <NUM>, and the second branch wire <NUM> includes a second horizontal branch wire <NUM>. The first horizontal branch wire <NUM> is perpendicular to the first vertical branch wire <NUM>. The first horizontal branch wire <NUM> is parallel to the second horizontal branch wire <NUM>. The first bridging structure <NUM> is disposed on the first vertical branch wire <NUM>, and the first bridging structure <NUM> connects the first vertical branch wire <NUM> with the first sub-wire <NUM>. The first vertical branch wire <NUM> is sequentially connected to the first horizontal branch wire <NUM> with the first sub-connection wire <NUM>. The second bridging structure <NUM> is disposed on the second horizontal branch wire <NUM>, and the second bridging structure <NUM> connects the second horizontal branch wire <NUM> with the second sub-wire <NUM>. The second horizontal branch wire <NUM> is connected to the second sub-connection wire <NUM>.

The junction of the first horizontal branch wire <NUM> and the first sub-connection wire <NUM> is disposed under the sealant <NUM> of the corner area <NUM>, and the distance between the junction and the outer edge <NUM> of the sealant is less than <NUM>.

The junction of the second horizontal branch wire <NUM> and the second sub-connection wire <NUM> is located under the sealant <NUM> in the corner area <NUM>, and the distance between the junction and the outer edge <NUM> of the sealant is less than <NUM>.

In particular, the sub-wire <NUM> corresponding to the transition hole is a ground wire or a low-level wire. That is, the sub-wire <NUM> corresponding to the outermost bridging structure <NUM> is a ground wire or a low-level wire. The ground wire and the low-level wire do not have high requirements for signal transmission. Thus, adding a branch wire <NUM> on the ground wire has little impact on the transmission signal, and it is suitable to use the branch wire <NUM> for transfer.

In particular, the projection of the first branch wire <NUM> on the first metal layer <NUM> does not coincide with the sub-wire <NUM>, and the branch wire <NUM> is formed on the second metal layer <NUM>. If they coincide, a large capacitance will be produced, which will affect the signal transmission on the sub-wire <NUM>. In terms of projection, the configuration between the two sub-wires <NUM> can reduce capacitive crosstalk, without affecting the signal transmission on the sub-wires <NUM>.

This invention also discloses another structure of the branch wire <NUM>. In particular, the first horizontal branch wire <NUM> is correspondingly disposed under the sealant <NUM> in the corner area <NUM>, and the first vertical branch wire <NUM> is disposed under the sealant <NUM> in the linear area <NUM>. The first bridging structure <NUM> is disposed under the sealant <NUM> of the linear area <NUM>, and the second bridging structure <NUM> is disposed under the sealant <NUM> of the corner area <NUM>. The corner area <NUM> is provided with the first branch wire <NUM>, and the first branch wire <NUM> is not provided beyond the corner area <NUM> to prevent the first branch wire <NUM> from being too long and increasing the impedance.

As another embodiment of the present invention, the present invention discloses a display device <NUM>. The display device <NUM> includes a display panel <NUM> and a backlight module <NUM>. The display panel <NUM> is divided into a display area <NUM> and a non-display area <NUM>, including: an array substrate <NUM>, and a color filter substrate <NUM> arranged opposite to the array substrate <NUM>. A sealant <NUM> is disposed between the array substrate <NUM> and the color filter substrate <NUM>, and the sealant <NUM> is disposed in the non-display area <NUM>.

The array substrate <NUM> includes a substrate <NUM>, a first metal layer <NUM>, a first insulating layer <NUM>, a second metal layer <NUM>, a second insulating layer <NUM>, and a conductive layer <NUM> that are stacked in sequence corresponding to the non-display area <NUM>. In the first metal layer <NUM> is formed n sub-wires <NUM>, and in the second metal layer <NUM> is formed n sub-connection wires <NUM> and at least one branch wire <NUM>. A group of bridging structures <NUM> are arranged in one-to-one correspondence between the plurality of sub-wires <NUM> and the plurality of sub-connection wires <NUM>. The conductive layer <NUM> is connected to the sub-wire <NUM> and the sub-connection wire <NUM> through the corresponding bridging structure <NUM>. The bridging structure <NUM> is disposed on the sub-wire <NUM>.

Of the n sub-wires <NUM>, the one closest to the outer edge <NUM> of the sealant is the first sub-wire <NUM>, and in the order of nearing the display area <NUM> from the position closest to the outer edge <NUM> of the sealant, the sub-wires <NUM> are sequentially the first sub-wire, the second sub-wire,. and the n-th sub-wire. Of the n sub-connection wires, the ones connected to the first sub-wire, the second sub-wire,. , and the nth sub-wire are respectively the first sub-connection wire, the second sub-connection wire,. , and the nth sub-connection wire. The bridging structures connecting the first sub-wires and the first sub-connection wires are the first bridging structures, which in turn are the second bridging structure,. , and the nth bridging structure.

The branch wire <NUM> includes a first branch wire <NUM> and a second branch wire <NUM>. The first branch wire <NUM> includes a first horizontal branch wire <NUM> and a first vertical branch wire <NUM>, and the second branch wire <NUM> includes a second horizontal branch wire <NUM>. The first horizontal branch wire <NUM> is perpendicular to the first vertical branch wire <NUM>. The first horizontal branch wire <NUM> is parallel to the second horizontal branch wire <NUM>. The first bridging structure <NUM> is disposed on the first vertical branch wire <NUM>, and the first bridging structure <NUM> connects the first vertical branch wire <NUM> with the first sub-wire <NUM>. The first vertical branch wire <NUM> is sequentially connected to the first horizontal branch wire <NUM> with the first sub-connection wire <NUM>. The second bridging structure <NUM> is disposed on the second horizontal branch wire <NUM>, and the second bridging structure <NUM> connects the second horizontal branch wire <NUM> with the second sub-wire <NUM>. The second horizontal branch wire <NUM> is connected to the second sub-connection wire <NUM>.

The sealant <NUM> is in the shape of an annular square or rectangle, and can be divided into a linear area <NUM> and a corner area <NUM>. The linear area <NUM> includes a first linear area <NUM> parallel to the first direction <NUM> and a second linear area <NUM> parallel to the second direction <NUM>. The first linear area <NUM> and the second linear area <NUM> are connected by a corner area <NUM>. The sealant <NUM> in each of the first linear area <NUM> and the second linear area <NUM> is a linear segment, and the sealant <NUM> in the corner area <NUM> is a curved segment.

The junction of the second horizontal branch wire <NUM> and the second sub-connection wire <NUM> is located under the sealant <NUM> in the corner area <NUM>, and the distance between the junction and the outer edge <NUM> of the sealant is less than <NUM>. The first bridging structure <NUM> is disposed under the sealant <NUM> of the linear region <NUM>. The distance between each of all the bridging structures <NUM> and the outer edge <NUM> of the sealant is at least <NUM>.

Different from the above-discussed embodiments, the present invention further discloses another embodiment. In particular, in order to make the distance between the outermost bridging structure <NUM> and the outer edge <NUM> of the sealant meet the condition of <NUM> without using the branch wire <NUM> to adjust the distance between the outermost bridging structure <NUM> and the outer edge <NUM> of the sealant, this embodiment first sets the via hole and then adjusts the coating of the sealant <NUM> depending on the position of the via hole, thus changing the coating distance for adjustment in order that the bridging structures <NUM> all meet the condition of being <NUM> from the outside of the sealant.

Claim 1:
A display panel (<NUM>), divided into a display area (<NUM>) and a non-display area (<NUM>), the display panel (<NUM>) comprising:
a first substrate (<NUM>);
a second substrate (<NUM>), disposed corresponding to the first substrate (<NUM>); and
a sealant (<NUM>), arranged between the first substrate (<NUM>) and the second substrate (<NUM>), and arranged in the non-display area (<NUM>);
wherein the first substrate (<NUM>) comprises a first metal layer (<NUM>) and a second metal layer (<NUM>) that are arranged in sequence corresponding to the non-display area (<NUM>), and that are insulated from each other;
wherein the first metal layer (<NUM>) comprises a first metal wire group and the second metal layer (<NUM>) comprises a second metal wire group (<NUM>); the first metal wire group comprises at least one sub-wire (<NUM>), the second metal wire group comprises at least one sub-connection wire (<NUM>); the at least one sub-wire (<NUM>) of the first metal wire group and the at least one sub-connection wire (<NUM>) of the second metal wire group are connected in one-to-one correspondence through a set of bridging structures (<NUM>), wherein the set of bridging structures (<NUM>) comprises at least one bridging structure (<NUM>);
wherein a side of the sealant (<NUM>) adjacent to the display area (<NUM>) is an inner side of the sealant (<NUM>), and a side of the sealant (<NUM>) far away from the display area (<NUM>) is an outer side of the sealant (<NUM>);
wherein the set of bridging structures (<NUM>) are each disposed on a side of an outer edge (<NUM>) of the sealant (<NUM>) adjacent to the display area (<NUM>);
wherein of the set of bridging structures (<NUM>), the bridging structure (<NUM>) closest to the outer edge (<NUM>) of the sealant (<NUM>) is an outermost bridging structure (<NUM>), and wherein a distance separating the outermost bridging structure (<NUM>) from the outer edge (<NUM>) of the sealant (<NUM>) is at least <NUM>.