CN109917596B

CN109917596B - Display panel and display device

Info

Publication number: CN109917596B
Application number: CN201910215649.8A
Authority: CN
Inventors: 许喜爱; 刘宗锥
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2021-09-28
Anticipated expiration: 2039-03-21
Also published as: CN109917596A

Abstract

The invention discloses a display panel and a display device, the display panel includes: the first substrate and the second substrate are arranged oppositely, and at least one conductive silver adhesive is arranged on the first substrate, one end of the first substrate, which exceeds the second substrate, forms an exposed area, the exposed area is positioned on one side of the first substrate, which is close to the second substrate, and the exposed area comprises at least one conductive connecting area; in the direction perpendicular to the plane of the first substrate, a metal layer, a flat layer, a passivation layer and an electrode layer are sequentially arranged on one side, close to the second substrate, of the conductive connection area, the flat layer is provided with at least one first through hole and at least one second through hole, the passivation layer is provided with a plurality of third through holes and a plurality of fourth through holes, and the second through holes are located on one side, far away from the second substrate, of the first through holes; the electrode layer is electrically connected with the metal layer through the third through hole and the fourth through hole; and a conductive layer is arranged on one side of the second substrate, which is far away from the first substrate, and the conductive layer is electrically connected with the conductive connection area through conductive silver adhesive. A display device comprises a display panel as described above.

Description

Display panel and display device

Technical Field

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

Background

The full-screen is a relatively wide definition of the design of the ultra-high screen ratio display screen in the technical field of display. Comprehensive screen has promoted display device's outward appearance at first, lets display device look more has science and technology to feel, and the positive area of same fuselage can hold bigger screen in addition, can show and promote visual experience.

With the advent of the full screen age, those skilled in the display technology art have faced even greater challenges. In order to realize a full-screen display, the frame of the display screen needs to be narrower and narrower, and more problems need to be solved if the frame is extremely narrow.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display device to solve the problem of realizing an extremely narrow bezel.

In a first aspect, the present invention provides a display panel comprising:

the first substrate and the second substrate are oppositely arranged, in the first direction, the length of the first substrate is greater than that of the second substrate, one end of the first substrate, which exceeds the second substrate, forms an exposed area, the exposed area is positioned on one side of the first substrate, which is close to the second substrate, and the exposed area comprises at least one conductive connecting area;

the liquid crystal layer is arranged between the first substrate and the second substrate, and one side of the first substrate, which is close to the liquid crystal layer, is provided with an alignment film;

the metal layer, the flat layer, the passivation layer and the electrode layer are sequentially arranged on one side, close to the second substrate, of the conductive connection area in the direction perpendicular to the plane of the first substrate, the flat layer is provided with at least one first through hole and at least one second through hole, the passivation layer is provided with a plurality of third through holes and a plurality of fourth through holes, and the second through holes are located on one side, away from the second substrate, of the first through holes in the first direction.

The orthographic projection of the first through hole in the direction perpendicular to the plane of the first substrate is a first projection, the orthographic projection of the second through hole in the direction perpendicular to the plane of the first substrate is a second projection, the orthographic projection of the third through hole in the direction perpendicular to the plane of the first substrate is a third projection, the orthographic projection of the fourth through hole in the direction perpendicular to the plane of the first substrate is a fourth projection, the first projection covers the third projection, the second projection covers the fourth projection, and the electrode layer is in contact with the metal layer through the third through hole and the fourth through hole.

The display panel further comprises at least one conductive silver adhesive, one side, far away from the first substrate, of the second substrate is provided with a conductive layer, the conductive silver adhesive is respectively contacted with the conductive layer and the electrode layer, the conductive layer is electrically connected with the conductive connection area through the conductive silver adhesive, and the conductive connection area corresponds to the conductive silver adhesive in a one-to-one mode.

In a second aspect, the present invention provides a display device comprising the display panel as described above.

The display panel and the display device provided by the invention have the following beneficial effects:

in the display panel, the conductive layer of the second substrate can be electrically connected with the conductive connection region of the first substrate through conductive silver adhesive; the liquid crystal layer is arranged between the first substrate and the second substrate, the alignment film is arranged on one side of the first substrate close to the liquid crystal layer, the alignment film can be coated on the first substrate through a coating process in the production process, the alignment film can partially cover the electrode layer on the surface of the conductive connection area in the coating process, and the effective conductive area of the electrode layer can be reduced when the alignment film partially covers the electrode layer on the surface of the conductive connection area due to the insulating property of the alignment film; meanwhile, it is easy to understand that the exposed area of the display panel cannot be used for displaying, so the size of the exposed area directly affects the screen occupation ratio of the display panel, and in order to realize the design of a larger screen occupation ratio, the size of the exposed area needs to be reduced, so that the buffer area reserved for the alignment film by the conductive connection area becomes smaller and smaller under the condition that the process precision reaches the limit, so that the area covered by the alignment film needs to be reduced in order to ensure the stability and reliability of the electrical connection between the conductive layer of the second substrate and the conductive connection area of the first substrate.

In order to solve the above problems, according to the display panel and the display device provided by the invention, in a direction perpendicular to a plane of the first substrate, a metal layer, a flat layer, a passivation layer and an electrode layer are sequentially arranged on one side of the conductive connection region close to the second substrate, the flat layer is provided with at least one first through hole and at least one second through hole, the passivation layer is provided with a plurality of third through holes and a plurality of fourth through holes, and the second through holes are arranged on one side of the first through holes away from the second substrate in the first direction; the through hole of the flat layer can make the electrode layer directly contact with the metal layer through the through hole of the passivation layer to realize electrical connection; on the other hand, in the production process of coating the alignment film on the first substrate, two through holes are formed in the flat layer, so that the area of the alignment film covering the conductive connection area can be effectively reduced, and the stability and reliability of the electrical connection between the conductive layer of the second substrate and the conductive connection area of the first substrate can be effectively guaranteed when the design of the extremely narrow frame is realized.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, the inventive content of the present invention is not limited to the embodiments shown in the following drawings, and other drawings can be obtained by those skilled in the art without inventive effort.

The dimensions and proportions of the figures in the following description are illustrative only and do not represent actual dimensions and proportions.

Fig. 1 is a schematic plan view of a display panel according to the present invention;

FIG. 2 is a cross-sectional view taken along line B-B' of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line C-C' of FIG. 3;

FIG. 5 is an enlarged view of another portion A of FIG. 1;

FIG. 6 is an enlarged view of yet another detail area A of FIG. 1;

FIG. 7 is an enlarged view of yet another portion A of FIG. 1;

FIG. 8 is an enlarged view of a portion A of FIG. 1;

FIG. 9 is an enlarged view of another portion A of FIG. 1;

FIG. 10 is an enlarged view of yet another detail area A of FIG. 1;

FIG. 11 is a schematic plan view of another display panel according to the present invention;

FIG. 12 is a schematic plan view of another display panel provided in the present invention;

fig. 13 is a schematic plan view of a display device according to the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and thus the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic plan view of a display panel according to the present invention; fig. 2 is a cross-sectional view taken along B-B' in fig. 1, and the present embodiment provides a display panel 100, where the display panel 100 includes:

the first substrate 110 and the second substrate 120 are disposed oppositely, in the first direction X, a length L1 of the first substrate 110 is greater than a length L2 of the second substrate 120, an exposed area 111 is formed at an end of the first substrate 110 beyond the second substrate 120, the exposed area 111 is located on a side of the first substrate 110 close to the second substrate 120, and the exposed area 111 includes at least one conductive connection area 130.

With continued reference to fig. 2, the display panel 100 further includes a liquid crystal layer 150 disposed between the first substrate 110 and the second substrate 120, and an alignment film 160 is disposed on a side of the first substrate 110 close to the liquid crystal layer 150. Note that, an alignment film, not shown in fig. 2, is also typically disposed on a side of the second substrate 120 close to the liquid crystal layer 150.

Referring to fig. 1, fig. 3 and fig. 4, fig. 3 is an enlarged view of a partial area a in fig. 1, fig. 4 is a cross-sectional view taken along C-C' in fig. 3, a metal layer 131, a planarization layer 132, a passivation layer 133 and an electrode layer 134 are sequentially disposed on a side of the conductive connection region 130 close to the second substrate 120 in a direction perpendicular to a plane of the first substrate 110, the planarization layer 132 is provided with at least one first through hole 001 and at least one second through hole 002, the passivation layer 133 is provided with a plurality of third through holes 003 and a plurality of fourth through holes 004, and the second through holes 002 are disposed on a side of the first through hole 001 away from the second substrate 120 in the first direction X. It should be noted that the projected areas, shapes, numbers and arrangement of the four through holes in fig. 3 and 4 are only schematic, and this embodiment is not limited in particular.

An orthographic projection of the first through hole 001 in a direction perpendicular to the plane of the first substrate 110 is a first projection, an orthographic projection of the second through hole 002 in a direction perpendicular to the plane of the first substrate 110 is a second projection, an orthographic projection of the third through hole 003 in a direction perpendicular to the plane of the first substrate 110 is a third projection, an orthographic projection of the fourth through hole 004 in a direction perpendicular to the plane of the first substrate 110 is a fourth projection, the first projection covers the third projection, the second projection covers the fourth projection, and the electrode layer 134 is in contact with the metal layer 131 through the third through hole 003 and the fourth through hole 004, so that electrical connection is achieved.

With continued reference to fig. 1, fig. 2, fig. 3, and fig. 4, the display panel 100 further includes at least one conductive silver paste 140, a conductive layer 121 is disposed on a side of the second substrate 120 away from the first substrate 110, the conductive silver paste 140 is respectively in contact with the conductive layer 121 and the electrode layer 134, the conductive layer 121 and the conductive connection region 130 are electrically connected through the conductive silver paste 140, and the conductive connection regions 130 and the conductive silver paste 140 are in one-to-one correspondence. The conductive silver paste is omitted from fig. 3 for clarity of illustration.

It should be noted that the conductive layer may be ITO (SnO2: In2O3, indium tin oxide) or ATO (SnO2: Sb2O3, tin antimony oxide), and normally, the conductive layer plays a role of dissipating static electricity on the substrate, but when the display panel adopts an In-cell touch design, the conductive layer adopts a high-resistance shielding film, and the high-resistance shielding film does not shield the touch signal. The commonly used high resistance shielding film is ATO, which has the function of shielding external electromagnetic interference in addition to conducting static electricity. It should be noted that fig. 1 only illustrates one conductive connection region 130 and one conductive silver paste 140, and the number of the conductive connection regions and the conductive silver paste is not particularly limited in the present invention, and is within the protection scope of the present invention as long as one or more of the conductive connection regions and the conductive silver paste are included.

It should be further noted that the alignment film in the liquid crystal display panel is used to provide initial alignment for the liquid crystal molecules, and usually the material used for the alignment film is Polyimide (PI), and in the production process of the liquid crystal display panel, the PI solution is coated on the substrate in a coating manner, and then the PI solution is cured through a thermosetting process, and then the cured PI is aligned through a rubbing alignment process or a photo-alignment process to form the alignment film, so that the alignment film can provide a pretilt angle for the liquid crystal molecules, and then the alignment film performs initial alignment for the liquid crystal molecules.

With reference to fig. 1, the area encircled by the dashed line in fig. 1 is a display area AA of the display panel 100, and the area of the display panel 100 except for the display area AA is a non-display area (not specifically labeled). In order to ensure the alignment effect, the alignment film needs to cover the entire display area AA, and in order to ensure that the alignment film can completely cover the display area AA, the alignment film needs to cover a part of the non-display area to some extent. As shown in fig. 1, the exposed region 111 of the first substrate 110 is located in the non-display region, and the conductive connection region 130 located in the exposed region 111 is also located in the non-display region. Due to the arrival of the comprehensive screen era, in order to realize larger screen occupation ratio, the frame needs to be more and more narrow, under the design concept of extremely narrow frame, the distance between the display area AA and the conductive connection area 130 needs to be further reduced, in the precision range of the current production process, the alignment film still easily covers the conductive connection area 130, because the alignment film has the insulating characteristic, the electrode layer covering the surface of the conductive connection area can reduce the effective conductive area of the conductive silver adhesive and the electrode layer, and further the stability and the reliability of the electrical connection between the conductive layer of the second substrate and the conductive connection area of the first substrate are influenced. It is necessary to reduce the area of the alignment film covering the conductive connection region in order to secure stability and reliability of the electrical connection of the conductive layer of the second substrate to the conductive connection region of the first substrate.

In order to solve the above problems, the display panel provided by the present invention has the following advantages:

in the display panel, in the direction perpendicular to the plane of the first substrate, a metal layer, a flat layer, a passivation layer and an electrode layer are sequentially arranged on one side, close to the second substrate, of the conductive connection area, the flat layer is provided with at least one first through hole and at least one second through hole, the passivation layer is provided with a plurality of third through holes and a plurality of fourth through holes, and the second through holes are arranged on one side, far away from the second substrate, of the first through holes in the first direction. In one aspect, the first and second vias of the planarization layer may enable the electrode layer to be in direct contact with the metal layer through the vias of the passivation layer to achieve electrical connection; on the other hand, two through holes are formed in the flat layer, a first through hole is formed in one side, close to the second substrate, of the conductive connection area in the direction of the first direction X, a second through hole is formed in one side, far away from the second substrate, of the flat layer, all the through holes of the flat layer can form depressions on the plane where the film layer is located, the depression direction is along the direction perpendicular to the plane where the first substrate is located, the depressions formed in the conductive connection area by the first through holes cannot disappear on the upper surface of the electrode layer of the conductive connection area due to the fact that the flat layer is provided with the through holes, and in the production process of coating PI liquid forming the alignment film on the first substrate, due to the liquidity of the liquid, the PI liquid can be effectively evacuated, the effect that the PI liquid is prevented from spreading is achieved, the area that the PI liquid spreads to the conductive connection area can be effectively reduced, and the stability and reliability of the electric connection between the conductive connection area of the second substrate and the conductive connection area of the first substrate in the design of the extremely narrow frame are effectively improved.

Optionally, with continuing reference to fig. 3 and fig. 4, in a direction perpendicular to the plane of the first substrate 110, a metal layer 131, a flat layer 132, a passivation layer 133, and an electrode layer 134 are sequentially disposed on one side of the conductive connection region 130 close to the second substrate 120, where the flat layer 132 is disposed with at least one first through hole 001 and at least one second through hole 002, an orthographic projection of the first through hole 001 in the direction perpendicular to the plane of the first substrate 110 is a first projection, an orthographic projection of the second through hole 002 in the direction perpendicular to the plane of the first substrate 110 is a second projection, and an area of the first projection is smaller than an area of the second projection. It should be noted that the shapes, the numbers and the arrangement of the projections of the four through holes in fig. 3 and fig. 4 are only schematic, and the embodiment is not limited in particular.

The display panel provided by the embodiment, the area of the first projection is smaller than that of the second projection, the first through hole is mainly used for obstructing the extension of the PI liquid forming the alignment film, and the second through hole is mainly used for ensuring the electric connection of the electrode layer and the metal layer, so that the area of the first projection is smaller than that of the second projection, the number of the first through holes can be increased, the effect of the extension of the PI liquid forming the alignment film by the better obstruction of the first through hole can be realized, and the effective area of the electric connection of the electrode layer and the metal layer is also ensured.

Optionally, with continued reference to fig. 3 and 4, an orthographic projection of the first via 001 in the direction perpendicular to the plane of the first substrate 110 is a first projection, an orthographic projection of the second via 002 in the direction perpendicular to the plane of the first substrate 110 is a second projection, an orthographic projection of the third via 003 in the direction perpendicular to the plane of the first substrate 110 is a third projection, an orthographic projection of the fourth via 004 in the direction perpendicular to the plane of the first substrate 110 is a fourth projection, the electrode layer 134 is in contact with the metal layer 131 through the third via 003 and the fourth via 004, so as to achieve electrical connection, an area of the third projection is smaller than an area of the first projection, and an area of the fourth projection is smaller than an area of the second projection.

Optionally, with continued reference to fig. 3 and 4, a first projection completely covers the third plurality of projections and a second projection completely covers the fourth plurality of projections. The positions of the first, second, third and fourth vias in the cross-sectional view of the film layer are indicated by dashed lines in fig. 4. It should be noted that the numbers and the arrangement manners of the first through holes, the second through holes, the third through holes, and the fourth through holes in fig. 3 and fig. 4 are only schematically shown, the number and the arrangement manners of the four through holes are not specifically limited in this embodiment, and neither the third projection that how much the specific first projection completely covers nor the fourth projection that how much the specific second projection completely covers is limited, which is determined by the specific circumstances.

The display panel that this embodiment provided, the orthographic projection's of third through-hole area in the direction of the plane of perpendicular to first base plate place is less than the orthographic projection's of first through-hole area in the direction of the plane of perpendicular to first base plate place, the orthographic projection's of fourth through-hole area in the direction of the plane of perpendicular to first base plate place is less than the orthographic projection's of second through-hole area in the direction of the plane of perpendicular to first base plate place, then can realize that first through-hole entangles the third through-hole, the fourth through-hole is entangled to the second through-hole, therefore, also can not influence the quantity of passivation layer through-hole under the condition that the planarization layer set up two kinds of through-holes, and then do not influence the effective area of being connected of electrode layer and metal level. Furthermore, one first projection completely covers a plurality of third projections, one second projection completely covers a plurality of fourth projections, the number of the third through holes and the number of the fourth through holes can be increased, corresponding depressions can be formed on the conductive connecting area film layer through the third through holes and the fourth through holes of the passivation layer, the separation effect on PI liquid can be increased through the increase of the number of the depressions of the passivation layer, and the effectiveness and the stability of effective electric connection of the electrode layer and the metal layer are further improved.

Alternatively, as shown in fig. 5, fig. 5 is an enlarged view of another partial area a in fig. 1 (conductive silver paste is not shown), an orthogonal projection of the third through hole 003 in the direction perpendicular to the plane of the first substrate 110 is a third projection, an orthogonal projection of the fourth through hole 004 in the direction perpendicular to the plane of the first substrate 110 is a fourth projection, and an area of the third projection is the same as an area of the fourth projection. It should be noted that the areas of the third projection and the fourth projection are the same here, not absolutely the same, but within the precision of the production process. In fig. 5, the number and arrangement of the first through holes, the second through holes, the third through holes, and the fourth through holes are only schematic and not limited in particular.

In the display panel provided by the embodiment, the sizes of the third through hole and the fourth through hole are set to be substantially the same, the design is simple and uniform, and the size monitoring of the third through hole and the fourth through hole in the process only needs to monitor one size standard, so that the process detection items are simplified.

Optionally, with continuing reference to fig. 3 and fig. 4, in a direction perpendicular to the plane of the first substrate 110, a metal layer 131, a planarization layer 132, a passivation layer 133 and an electrode layer 134 are sequentially disposed on a side of the conductive connection region 130 close to the second substrate 120, the planarization layer 132 is disposed with at least one first through hole 001 and at least one second through hole 002, the passivation layer 133 is disposed with a plurality of third through holes 003 and a plurality of fourth through holes 004, and in the first direction X, the second through hole 002 is located on a side of the first through hole 001 away from the second substrate 120. The electrode layer 134 is in contact with the metal layer 131 through the third and fourth through-

holes

003 and 004, thereby achieving electrical connection. Wherein the metal layer 131 is connected to ground potential.

With continued reference to fig. 1, fig. 2, fig. 3, and fig. 4, the display panel 100 further includes at least one conductive silver paste 140, a conductive layer 121 is disposed on a side of the second substrate 120 away from the first substrate 110, the conductive silver paste 140 is respectively in contact with the conductive layer 121 and the electrode layer 134, the conductive layer 121 and the conductive connection region 130 are electrically connected through the conductive silver paste 140, and the conductive connection regions 130 and the conductive silver paste 140 are in one-to-one correspondence.

In the display panel provided by this embodiment, the conductive silver paste is in direct contact with the conductive layer on one side of the second substrate and the electrode layer of the conductive connection area of the first substrate, the conductive silver paste electrically connects the conductive layer of the second substrate and the conductive connection area of the first substrate, the electrode layer on the surface of the conductive connection area is electrically connected with the metal layer through the through hole formed by the flat layer and the passivation layer, the metal layer of the conductive connection area is connected with the ground potential, the entire conductive connection area is also connected with the ground potential, and the conductive layer of the second substrate is also connected with the ground potential. When the second substrate generates or contacts static electricity, the static electricity can be conducted to the conductive connection area of the first substrate along the conductive silver adhesive and then conducted to the ground potential, and the static electricity can be regarded as being conducted to the ground, so that the effect of conducting away the static electricity is realized, and devices and circuits in the display panel cannot be influenced by the static electricity.

Alternatively, as shown in fig. 5, 6 and 7, fig. 6 is an enlarged view of another partial area a in fig. 1 (conductive silver paste is not shown), fig. 7 is an enlarged view of another partial area a in fig. 1 (conductive silver paste is not shown), and in fig. 5, orthographic projections of the first through hole, the second through hole, the third through hole and the fourth through hole in a direction perpendicular to the plane of the first substrate are all rectangular; in fig. 6, the orthographic projection of the first through hole in the direction perpendicular to the plane of the first substrate is in the shape of a strip, and the orthographic projection of the second through hole, the orthographic projection of the third through hole and the orthographic projection of the fourth through hole in the direction perpendicular to the plane of the first substrate are all in the shape of a rectangle; in fig. 7, the orthographic projection of the first through hole in the direction perpendicular to the plane of the first substrate is circular, and the orthographic projection of the second through hole, the orthographic projection of the third through hole and the orthographic projection of the fourth through hole in the direction perpendicular to the plane of the first substrate are all rectangular.

It should be noted that fig. 5, 6, and 7 only schematically show the orthographic projection shapes of the first through hole, the second through hole, the third through hole, and the fourth through hole in the direction perpendicular to the plane of the first substrate, and the orthographic projection shapes of the four through holes may be one or more of a circle, an ellipse, a strip, and a polygon, or a mixture of a plurality of the above shapes, and the present invention is not particularly limited; in addition, fig. 5, 6 and 7 are only schematic for the number and arrangement of the first through holes, the second through holes, the third through holes and the fourth through holes, and the present invention is not limited in detail.

Further, in fig. 6, the projection of the first via 001 is a stripe, and in fig. 6, three stripe-shaped first vias 001 are illustrated, wherein the projection of the first via 001a does not cover the projection of the third via 003, and the projections of the three first vias and the conductive connection region 130 are only partially overlapped, and in fig. 6, the edge where the projection of the conductive connection region and the projections of the first via 001a, the first via 001b, and the first via 001c are overlapped is illustrated by a dotted line; when the number of the third through holes 003 and the fourth through holes 004 of the passivation layer is not affected, the projection of the first through hole 001 extends to the region outside the conductive connection region 130, so that the blocking effect of the first through hole on the PI solution can be enhanced, the stability and reliability of the electrical connection between the conductive silver paste and the electrode layer are improved, and the static electricity conducting performance is improved.

The display panel provided by the embodiment provides multiple possibilities for the orthographic projection shapes of the first through hole, the second through hole, the third through hole and the fourth through hole in the direction perpendicular to the plane of the first substrate, the four through holes can be in one shape or in combination of multiple shapes, the design scheme is flexible and changeable, and the design requirements of different processes or electric contact effects can be met.

Alternatively, as shown in fig. 8, fig. 8 is an enlarged view of a partial region a in fig. 1 (conductive silver paste is not shown), and in fig. 8, the first through holes 001 are arranged in an array; it should be noted that the arrangement of the second through holes 002, the third through holes 003, and the fourth through holes 004 in fig. 8 is only schematic and not specifically limited, as long as the first through holes 001 are arranged in an array, and the number and the shape of the four through holes are also schematic and not specifically limited.

The display panel that this embodiment provided, first through-hole are the array and arrange, and the array is arranged and can more effective separation be used for forming spreading of the PI liquid of joining in marriage the membrane, reduces the area that PI liquid spreads to the electrode layer to guarantee the effective area of the electric connection of electrode layer and metal level, thereby make the stability and the reliability of the electric connection of the conducting layer of second base plate and the electrically conductive joining region of first base plate better.

Alternatively, as shown in fig. 9, fig. 9 is an enlarged view of another partial area a in fig. 1 (conductive silver paste is not shown), a plurality of third through holes 003 and a plurality of fourth through holes 004 are all arranged in an array, and it should be noted that the arrangement of the first through holes 001 and the second through holes 002 in fig. 9 is only schematic and not specifically limited, and in addition, the number and the shape of the four through holes are also schematic and not specifically limited.

The display panel that this embodiment provided, a plurality of third through-holes and a plurality of fourth through-holes all are array arrangement and can make the electric connection of electrode layer and metal level more even stable, and the third through-hole is array arrangement and further promotes the effect that the separation is used for forming spreading of the PI liquid of joining in marriage the membrane to the stability and the reliability of the electric connection of the conducting layer that makes the second base plate and the electrically conductive joining region of first base plate are better.

Optionally, as shown in fig. 10, fig. 10 is an enlarged view of another partial area a in fig. 1 (conductive silver paste is not shown), fig. 10 illustrates a situation that fourth through holes 004 are arranged in an array, and it should be noted that the arrangement manner of the first through hole 001, the second through hole 002 and the third through hole 003 in fig. 10 is only schematic and is not specifically limited; the number and shape of the four through holes in the drawing are not particularly limited. The plurality of third through holes are arranged in an array, and the plurality of fourth through holes are not arranged in a non-array manner and are not shown in other figures.

In the display panel provided by this embodiment, any one of the plurality of third through holes and the plurality of fourth through holes is arranged in an array, so that the through holes of the passivation layer of the conductive connection region can be arranged in multiple ways, and not only are the through holes limited to regular arrangement or irregular arrangement, so that the design flexibility is increased.

Optionally, as shown in fig. 11, fig. 11 is a schematic plan view of another display panel provided by the present invention, the display panel 100 includes a first substrate 110 and a second substrate 120 that are disposed opposite to each other, in a first direction X, a length L1 of the first substrate 110 is greater than a length L2 of the second substrate 120, an exposed area 111 is formed at an end of the first substrate 110 that exceeds the second substrate 120, the exposed area 111 is located on a side of the first substrate 110 close to the second substrate 120, and the exposed area 111 includes at least one conductive connection area 130. In a direction perpendicular to the plane of the first substrate 110, a metal layer, a flat layer, a passivation layer, and an electrode layer are sequentially disposed on a side of the conductive connection region 130 close to the second substrate 120, and the electrode layer is in contact with and electrically connected to the metal layer through a via hole disposed in the flat layer and the passivation layer, respectively (the cross-sectional film structure of the conductive connection region has been described in detail previously, and is not described here again). The display panel 100 further includes at least one conductive silver paste 140, a conductive layer 121 is disposed on a side of the second substrate 120 away from the first substrate 110, the conductive silver paste 140 is respectively in contact with the conductive layer 121 and the electrode layer, the conductive layer 121 and the conductive connection region 130 are electrically connected through the conductive silver paste 140, and the conductive connection regions 130 and the conductive silver paste 140 are in one-to-one correspondence. Only one conductive silver paste 140 and one conductive connection region 130 are shown in fig. 11, and fig. 11 is only schematic, and the number of conductive silver pastes and conductive connection regions is not particularly limited.

Further, the first substrate 110 is provided with a first ground trace 112, the first ground trace 112 partially surrounds the display area AA and is located on one side of the first substrate 110 close to the second substrate 120, the first ground trace is located in a non-display area corresponding to the first substrate 110, a metal layer of the conductive connection area 130 is electrically connected to the first ground trace 112, the first ground trace 112 may be disposed on the same layer as the metal layer of the conductive connection layer 130, or disposed on different layers, but disposed on different layers need to be connected through a via hole, and the first ground trace 112 is connected to a ground potential.

Still further, the first substrate is usually further provided with a corresponding driving circuit (not shown in fig. 11), the driving circuit is disposed on a side of the first substrate 110 close to the second substrate 120, the driving circuit generally includes a plurality of thin film transistors and a plurality of conductive leads, and static electricity may damage the thin film transistors or the conductive leads to a certain extent, so the driving circuit disposed on the first substrate is usually also electrically connected to the first grounding trace, so as to achieve grounding of the driving circuit.

It should be noted that, in fig. 11, the first ground trace 112 is partially disposed around the display area AA, which is only schematic, and the position of the first ground trace is not particularly limited in the present invention.

The display panel that this embodiment provided, the conducting layer of conducting silver glue and second base plate one side and the electrode layer direct contact of the electrically conductive joining region of first base plate, the conducting layer that conducting silver glue kept away from first base plate one side setting with the second base plate is connected with the electrically conductive joining region electricity of first base plate, the through-hole that the electrode layer on electrically conductive joining region surface set up through planarization layer and passivation layer is connected with the metal level electricity, the metal level of electrically conductive joining region is walked the line with the first ground connection that sets up on first base plate and is connected electrically, first ground connection is walked the line and is connected the ground potential, then whole electrically conductive joining region has also received the ground potential, consequently, the ground potential has also been received to the conducting layer of second base plate. When the first substrate or the second substrate generates or contacts static electricity, the static electricity on the second substrate can be conducted to the conductive connection area of the first substrate along the conductive silver adhesive and further conducted to the first grounding wire, and the effect that the static electricity is conducted away can be achieved when the first grounding wire is connected to the ground potential; the static electricity of the first substrate can be conducted to the ground potential along the first grounding wire, so that the devices and wires in the display panel are not affected by the static electricity.

Optionally, as shown in fig. 12, fig. 12 is a schematic plan view of another display panel provided by the present invention, where the display panel 100 further includes a flexible circuit board 170, the exposed area 111 includes a bonding area 113, one end of the flexible circuit board 170 is electrically connected to the bonding area 113, the flexible circuit board includes a second ground trace 171, the first ground trace 112 is electrically connected to the second ground trace 171, and the second ground trace 171 is connected to a ground potential.

It should be noted that the positions of the first ground trace and the second ground trace shown in fig. 12 are only schematic, and the present invention is not limited in particular, and the electrical connection between the first ground trace and the second ground trace is realized by intermediate transition connection in the bonding region, or may be realized by other manners, and the present invention is not limited in particular.

In the display panel provided by this embodiment, the static electricity on the display panel can be conducted to the second grounding trace on the flexible printed circuit board through the first grounding trace, and the second grounding trace of the flexible printed circuit board is connected to the ground potential, so that the static electricity on the display panel can be conducted to the ground potential, so that the lines and devices in the display panel are not damaged by the static electricity,

fig. 13 is a schematic plane structure view of a display device according to an embodiment of the present invention, and fig. 13 is a schematic plane structure view of the display device according to the present invention, and the display device 200 includes any one of the display panels described above, it is easily understood that the display device provided in this embodiment has all the beneficial effects of the display panel described above, and details are not repeated here. The display device provided by the application can be any electronic equipment with a display function, such as a mobile phone, a notebook computer, a tablet computer, a television, a display, a vehicle-mounted display and the like.

Claims

1. A display panel, comprising:

the circuit comprises a first substrate and a second substrate which are oppositely arranged, wherein the length of the first substrate is greater than that of the second substrate in a first direction, one end of the first substrate, which exceeds the second substrate, forms an exposed area, the exposed area is positioned on one side of the first substrate, which is close to the second substrate, and the exposed area comprises at least one conductive connection area;

the liquid crystal layer is arranged between the first substrate and the second substrate, and an alignment film is arranged on one side, close to the liquid crystal layer, of the first substrate;

in a direction perpendicular to a plane where the first substrate is located, a metal layer, a flat layer, a passivation layer and an electrode layer are sequentially arranged on one side, close to the second substrate, of the conductive connection area, the flat layer is provided with at least one first through hole and at least one second through hole, the passivation layer is provided with a plurality of third through holes and a plurality of fourth through holes, and in the first direction, the second through holes are located on one side, far away from the second substrate, of the first through holes;

the orthographic projection of the first through hole in the direction perpendicular to the plane of the first substrate is a first projection, the orthographic projection of the second through hole in the direction perpendicular to the plane of the first substrate is a second projection, the orthographic projection of the third through hole in the direction perpendicular to the plane of the first substrate is a third projection, the orthographic projection of the fourth through hole in the direction perpendicular to the plane of the first substrate is a fourth projection, one first projection completely covers a plurality of third projections, one second projection completely covers a plurality of fourth projections, and the electrode layer is in contact with the metal layer through the third through hole and the fourth through hole;

the display panel further comprises at least one conductive silver adhesive, a conductive layer is arranged on one side, far away from the first substrate, of the second substrate, the conductive silver adhesive is respectively contacted with the conductive layer and the electrode layer, the conductive layer is electrically connected with the conductive connection area through the conductive silver adhesive, and the conductive connection area is in one-to-one correspondence with the conductive silver adhesive;

the first through hole, the second through hole, the third through hole and the fourth through hole form a corresponding first recess on the plane where the film layer of the conductive connection area is located, the upper surface of the electrode layer of the conductive connection area forms a second recess, and the directions of the first recess and the second recess are all along the direction perpendicular to the plane where the first substrate is located.

2. The display panel of claim 1, wherein the area of the first projection is smaller than the area of the second projection.

3. The display panel of claim 1, wherein the area of the third projection is smaller than the area of the first projection, and the area of the fourth projection is smaller than the area of the second projection.

4. The display panel of claim 1, wherein the area of the third projection is the same as the area of the fourth projection.

5. The display panel according to claim 1, wherein the metal layer is connected to a ground potential.

6. The display panel of claim 1, wherein the first projection, the second projection, the third projection, and the fourth projection are one or more of circular, elliptical, bar, and polygonal in shape.

7. The display panel according to claim 1, wherein the first through holes are arranged in an array.

8. The display panel according to claim 1, wherein a plurality of the third through holes and/or

The fourth through holes are arranged in an array.

9. The display panel according to claim 5, wherein the first substrate is provided with a first ground trace, the metal layer is electrically connected to the first ground trace, and the first ground trace is connected to a ground potential.

10. The display panel of claim 9, wherein the display panel further comprises a flexible circuit board, wherein the exposed area comprises a bonding area, wherein one end of the flexible circuit board is electrically connected to the bonding area, wherein the flexible circuit board comprises a second ground trace, wherein the first ground trace is electrically connected to the second ground trace, and wherein the second ground trace is connected to a ground potential.

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