CN111399290B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111399290B CN111399290B CN202010337895.3A CN202010337895A CN111399290B CN 111399290 B CN111399290 B CN 111399290B CN 202010337895 A CN202010337895 A CN 202010337895A CN 111399290 B CN111399290 B CN 111399290B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
Abstract
The invention discloses a display panel and a display device, and relates to the technical field of display, wherein a binding region comprises a first binding region and a second binding region which is positioned on at least one side of the first binding region along a first direction, a first conductive layer of the first binding region comprises first conductive particles, and a second conductive layer of the second binding region comprises second conductive particles; the second bonding area further comprises a plurality of electrical connection terminals; the first binding region and the second binding region are overlapped along the orthographic projection of the direction perpendicular to the light-emitting surface of the display panel and form an overlapped region, and at least part of the at least one electric connecting terminal is positioned in the overlapped region; the first bonded region includes a first region other than the overlapping region, and the second bonded region includes a second region other than the overlapping region; the total density of the first conductive particles and the second conductive particles in the overlap region is M0, the density of the first conductive particles in the first region is M1, the density of the second conductive particles in the second region is M2, M0 > M1, and M0 > M2. It is advantageous to reduce the impedance of the overlap region.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
From the CRT (Cathode Ray Tube) era to the liquid crystal era and now to the OLED (Organic Light-Emitting Diode) era, the display industry has been developing over decades. The display industry is closely related to our lives, and display technologies cannot be separated from traditional mobile phones, flat panels, televisions and PCs, to current intelligent wearable devices and VRs.
With the development of scientific technology, display panels have increasingly moved to narrow bezel designs. When realizing narrow frame, inevitably can increase the impedance that is located the partial line of walking of binding the district to probably increase the risk that display panel driving capability is not enough, influence display panel's normal demonstration.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which are beneficial to reducing the impedance of an overlapping region, so as to be beneficial to reducing the total impedance of an electrical connection terminal of the overlapping region and a trace electrically connected to the electrical connection terminal, thereby being beneficial to avoiding the phenomenon of insufficient driving of the display panel and improving the display brightness uniformity of the display panel and the display device.
In a first aspect, the present application provides a display panel, including a display area and a non-display area, wherein the display area includes a plurality of gate lines extending along a first direction and arranged along a second direction, and a plurality of data lines arranged along the first direction and extending along the second direction, and the first direction and the second direction intersect;
the non-display area comprises a binding area, the binding area comprises a first binding area and a second binding area positioned on at least one side of the first binding area along the first direction, the first binding area is covered with a first conductive layer, the second binding area is covered with a second conductive layer, the first conductive layer comprises a plurality of first conductive particles, and the second conductive layer comprises a plurality of second conductive particles; the second bonding region further comprises a plurality of electrical connection terminals covered by the second conductive layer;
the first binding region and the second binding region are overlapped along the orthographic projection of the direction perpendicular to the light-emitting surface of the display panel and form an overlapping region, and at least part of at least one electric connecting terminal is positioned in the overlapping region; the first bonded region includes a first region other than the overlapping region, and the second bonded region includes a second region other than the overlapping region; wherein a total density of the first conductive particles and the second conductive particles contained in the overlapping region is M0, a density of the first conductive particles contained in the first region is M1, a density of the second conductive particles contained in the second region is M2, M0 > M1, and M0 > M2.
In a second aspect, the present application provides a display device including the display panel provided in the present application.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
in the display panel and the display device provided by the invention, the binding region comprises a first binding region and a second binding region which is positioned on at least one side of the first binding region along the first direction, the first binding region and the second binding region are both covered by the conductive layer, and the first conductive layer covering the first binding region comprises a plurality of first conductive particles, so that the binding of the first binding region and other components is realized; the second conductive layer covering the second binding region includes a plurality of second conductive particles therein, thereby achieving binding of the second binding region with other components. Particularly, in the direction perpendicular to the light emitting surface of the display panel, the orthographic projections of the first binding region and the second binding region to the light emitting surface of the display panel are overlapped to form an overlapping region, and the total density of the first conductive particles and the second conductive particles contained in the overlapping region is greater than the density of the first conductive particles or the second conductive particles contained in other non-overlapping regions, so that when the total density of the conductive particles is increased, the total impedance of the conductive particles in the overlapping region is reduced, and the phenomenon that the driving of the display panel is insufficient due to the fact that the impedance of the first conductive layer and the impedance of the second conductive layer are too large is avoided. In addition, because at least one part of at least one electric connecting terminal is located the overlap region, make this electric connecting terminal and the display area with the holistic impedance of signal line that this electric connecting terminal electricity is connected obtain reducing like this, when the impedance of signal line in the display panel reduces, be favorable to reducing in the display area from being close to the whole pressure drop of one side of binding the district to keeping away from one side of binding the district, and then be favorable to reducing in the display area from being close to the luminance difference of one side of binding the district to keeping away from one side of binding the district, promote display panel and display device's display brightness uniformity, therefore be favorable to promoting display panel and display device's display effect.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram illustrating a bonding area in a display panel according to the prior art;
fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;
FIG. 3 is an enlarged schematic view of the binding region of the present application;
FIG. 4 is another enlarged schematic view of the bonding region of the present application;
FIG. 5 is a schematic view of an arrangement of first conductive particles in the first conductive layer;
FIG. 6 is a schematic view showing an arrangement of the second conductive particles in the second conductive layer;
FIG. 7 is a schematic view showing an arrangement of first conductive particles and second conductive particles in an overlap region;
FIG. 8 is another enlarged schematic view of the bonding region of the present application;
FIG. 9 is another enlarged schematic view of the bonding region of the present application;
FIG. 10 is another enlarged schematic view of the bonding region of the present application;
FIG. 11 is another enlarged schematic view of the bonding region of the present application;
fig. 12 is a partially enlarged schematic view of an electrical connection terminal provided in an embodiment of the present application;
FIG. 13 shows a cross-sectional view AA' of FIG. 12;
FIG. 14 is another enlarged schematic view of the bonding region of the present application;
fig. 15 is a schematic diagram illustrating a method of bonding a driver chip and a flexible circuit board on a display panel;
fig. 16 is a schematic view illustrating a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of a binding region 300 in a display panel provided in the prior art, where the binding region includes a main binding region 301 and two auxiliary binding regions 302, and in order to implement a narrow bezel design, the two auxiliary binding regions 302 are usually disposed on two sides of the main binding region 301 along a first direction, a plurality of input terminals 3011 and a plurality of output terminals 3012 are disposed in the main binding region 301, and the input terminals 3011 and the output terminals 3012 are usually electrically connected in a one-to-one correspondence. The input terminal 3011 in the main binding region 301 and the electrical connection terminal 3021 in the auxiliary binding region 3012 are electrically connected correspondingly, and the output terminal 3012 in the main binding region 301 is used for electrically connecting with a signal trace in a display region of a display panel, so that the electrical connection between the electrical connection terminal in the auxiliary binding region and the signal trace in the display region is realized. When the number of the electrical connection terminals 3021 in the auxiliary bonding region 302 is large, the impedance of a portion of the electrical connection terminal 3021 and the lead wire electrically connected thereto is large, for example, the impedance of the electrical connection terminal 3021 farthest from the main bonding region 301 along the first direction and the lead wire connected thereto will be large, on one hand, the risk of insufficient driving capability of the display panel may be increased, and on the other hand, the luminance difference from the side close to the bonding region to the side far from the bonding region in the display region may be large, which may affect the display effect of the display panel and the display device.
In view of this, the present invention provides a display panel and a display device, which are beneficial to reducing the impedance of an overlapping region, so as to reduce the total impedance of an electrical connection terminal of the overlapping region and a trace electrically connected to the electrical connection terminal, reduce the risk of insufficient driving capability of the display panel, and improve the display brightness uniformity of the display panel and the display device.
Fig. 2 is a top view of a display panel provided in an embodiment of the present application, fig. 3 is an enlarged schematic view of a bonding area in the present application, fig. 4 is another enlarged schematic view of a bonding area in the present application, fig. 3 illustrates a case where the bonding area includes a first bonding area and a second bonding area, and fig. 4 illustrates a case where the bonding area includes a first bonding area and two second bonding areas.
Referring to fig. 2, the present application provides a display panel 100, including a display area 10 and a non-display area 20, wherein the display area 10 includes a plurality of gate lines 11 extending along a first direction and arranged along a second direction, and a plurality of data lines 12 arranged along the first direction and extending along the second direction, and the first direction and the second direction intersect;
referring to fig. 2, 3 and 4, the non-display area 20 includes a bonding region 30, the bonding region 30 includes a first bonding region 31 and a second bonding region 32 located at least on one side of the first bonding region 31 along a first direction, the first bonding region 31 is covered with a first conductive layer 51 as shown in fig. 5, the second bonding region 32 is covered with a second conductive layer 52 as shown in fig. 6, the first conductive layer 51 includes a plurality of first conductive particles 61, and the second conductive layer 52 includes a plurality of second conductive particles 62; the second bonding area 32 further comprises a plurality of electrical connection terminals 50 covered by a second conductive layer 52; fig. 5 is a schematic diagram showing an arrangement of the first conductive particles 61 in the first conductive layer 51, and fig. 6 is a schematic diagram showing an arrangement of the second conductive particles 62 in the second conductive layer 52;
the first and second binding regions 31 and 32 overlap and form an overlap region 40 in an orthographic projection in a direction perpendicular to the light exit surface of the display panel 100, at least part of the at least one electrical connection terminal 50 being located in the overlap region 40; the first bonded region 31 includes a first region other than the overlapping region 40, and the second bonded region 32 includes a second region other than the overlapping region 40; wherein the total density of the first conductive particles 61 and the second conductive particles 62 contained in the overlap region 40 is M0, the density of the first conductive particles 61 contained in the first region is M1, the density of the second conductive particles 62 contained in the second region is M2, M0 > M1, and M0 > M2.
Alternatively, referring to fig. 5 and 6, the first conductive layer 51 is formed by filling the binder with the first conductive particles 61, wherein the first conductive layer 51 is formed by using the binder as a substrate. Similarly, the second conductive layer 52 is formed by using a binder as a base material, and the second conductive layer 52 is formed by filling the binder with the second conductive particles 62. In an alternative embodiment of the present invention, the first Conductive layer 51 and the second Conductive layer 52 may be embodied as Anisotropic Conductive Film (ACF). When the ACF film is not pressurized and heated, the conductive particles are uniformly distributed in the adhesive and do not contact with each other, and the ACF film is not conductive. When the ACF film is heated under pressure, the conductive particles are pressed together in the region having the electrical connection terminals to form a conductive state, and the adhesive is cured by heating to maintain the conductive state. In the actual manufacturing process, a first conductive layer 51 may be formed in the first bonding region 31 of the display panel 100, and the first conductive particles 61 in the first conductive layer 51 are uniformly distributed in the binder; then, a second conductive layer 52 is formed in the second bonding region 32 on the display panel 100, the second conductive particles 62 in the second conductive layer 52 are uniformly distributed in the binder, and at least a portion of the second conductive layer 52 covers the first conductive layer 51 to form an overlap region 40 with the first conductive layer 51, where the concentration of the conductive particles in the overlap region 40 is the sum of the concentrations of the first conductive particles 61 and the second conductive particles 62.
It should be noted that fig. 2 only illustrates the structure of the display panel 100 being rectangular, and in some other embodiments of the present application, the display panel 100 may also be embodied in other structures besides rectangular, which is not specifically limited in the present application. Fig. 3 and 4 also illustrate only the first and second bonding regions 31 and 32 and do not represent the actual dimensions of the first and second bonding regions 31 and 32, while the electrical connection terminals 50 in the second bonding region 32 are also illustrated and are not limited in number, size, and shape. In this application, one or two of the second binding regions 32 may be as shown in fig. 3, and as shown in fig. 4, optionally, the display panel 100 includes two second binding regions 32, and the two second binding regions 32 are respectively located at two sides of the first binding region 31 along the first direction. When the number of the second bonding areas 32 is two and the second bonding areas are respectively arranged on two sides of the first bonding area 31 along the first direction, the space of the bonding areas 30 can be utilized reasonably, and the overlong routing length when the electrical connection terminal 50 of the second bonding area 32 is electrically connected with the first bonding area 31 can be avoided. The following embodiments of the present application will be described by taking as an example that the bonded region 30 includes two second bonded regions 32.
Specifically, with continued reference to fig. 4, the present application provides a display panel 100, in which a first bonding region 31 and a second bonding region 32 are introduced into a bonding region 30 of the display panel 100, and the second bonding region 32 is located on two sides of the first bonding region 31 along a first direction. The first binding region 31 and the second binding region 32 are both covered by a conductive layer, and the first conductive layer 51 covering the first binding region 31 includes a plurality of first conductive particles 61 therein, so as to achieve binding of the first binding region 31 with other components, alternatively, the first binding region 31 may be used to bind a driver chip, and the first binding region 31 includes a plurality of signal input terminals 53 and a plurality of signal output terminals 54, and the driver chip is electrically connected with the signal input terminals 53 and the plurality of signal output terminals 54 in the first binding region 31 through the first conductive particles 61 in the first conductive layer 51. The second conductive layer 52 covering the second bonding region 32 includes a plurality of second conductive particles 62 therein, so as to bond the second bonding region 32 with other components, optionally, the second bonding region 32 may be used to bond a flexible circuit board, and the electrical connection terminal 50 in the second bonding region 32 is electrically connected with the flexible circuit board 103 through the second conductive particles 62 in the second conductive layer 52. Optionally, the signal input terminal 53 in the first bonding area is used to form an electrical connection with the electrical connection terminal 50 in the second bonding area, and the signal output terminal 54 is also used to form an electrical connection with a signal trace in the display area, where the signal trace may be, for example, a data line, a power signal line, or the like, which is not particularly limited in this application. It should be noted that the arrangement of the signal input terminal 53 and the signal output terminal 54 included in the first bonding area 31 in fig. 4 is only an illustration, and in some other embodiments of the present invention, the signal input terminal 53 and the signal output terminal 54 may also be oppositely disposed along the second direction, which is not specifically limited in this application.
Fig. 5 is a schematic diagram illustrating an arrangement of the first conductive particles 61 in the first conductive layer 51, wherein the density of the first conductive particles 61 contained in the first region (i.e., the non-overlapping region 40) in the first binding region 31 is M1; fig. 6 is a schematic diagram illustrating an arrangement of the second conductive particles 62 in the second conductive layer 52, wherein the second conductive particles 62 are contained in the second region (i.e., the non-overlapping region 40) in the second binding region 32 with a density M2; fig. 7 is a schematic diagram illustrating an arrangement of the first conductive particles 61 and the second conductive particles 62 in the overlap region 40, wherein the total density of the first conductive particles 61 and the second conductive particles 62 contained in the overlap region 40 is M0. Referring to fig. 4 to 7, in a direction perpendicular to the light emitting surface of the display panel 100, the first binding region 31 and the second binding region 32 overlap with each other in a front projection direction of the light emitting surface of the display panel 100 to form an overlapping region 40, and a total density of the first conductive particles 61 and the second conductive particles 62 included in the overlapping region 40 is greater than a density of the first conductive particles 61 or the second conductive particles 62 included in the other non-overlapping regions 40, so that when the total density of the conductive particles is increased, a total impedance of the conductive particles in the overlapping region 40 is reduced, thereby being beneficial to avoiding a phenomenon that the display panel 100 is under-driven due to an excessively large impedance of the first conductive layer 51 and the second conductive layer 52. In addition, because at least a portion of at least one electrical connection terminal 50 is located in the overlap region 40, the overall impedance of the electrical connection terminal 50 and the signal trace electrically connected to the electrical connection terminal 50 in the display region 10 is reduced, and when the impedance of the signal trace in the display panel 100 is reduced, the overall voltage drop from the side close to the bonding region 30 to the side far from the bonding region 30 in the display region 10 is reduced, so that the brightness difference from the side close to the bonding region 30 to the side far from the bonding region 30 in the display region 10 is reduced, the display brightness uniformity of the display panel 100 is improved, and thus the display effect of the display panel 100 is improved.
In an alternative embodiment of the present invention, in the second bonding region 32, the electrical connection terminals 50 are arranged along a first direction, or the electrical connection terminals 50 are arranged along a second direction, or the electrical connection terminals 50 are arranged along a third direction, wherein the third direction intersects with the first direction and the second direction, respectively.
Specifically, fig. 8 is another enlarged schematic view of the bonding regions 30 in the present application, in which the electrical connection terminals 50 located in the second bonding regions 32 are arranged along the first direction, and at least a portion of each of 3 electrical connection terminals 50 in two second bonding regions 32 is located in the overlapping region 40 formed by the first bonding region 31 and the second bonding region 32. Fig. 9 is another enlarged view of the bonding regions 30 of the present application, in which the electrical connection terminals 50 in two second bonding regions 32 are arranged along the second direction, and at least a portion of 4 electrical connection terminals 50 in each of the second bonding regions 32 is located in the overlapping region 40. Fig. 10 is another enlarged schematic view of the bonding regions 30 in the present application, in this embodiment, the electrical connection terminals 50 in two bonding regions 30 are arranged along a third direction, and optionally, the third direction may intersect the first direction at an acute angle, for example, the third direction intersects the first direction at an acute angle of 30 °, 45 °, or 60 °, and at least a portion of 2 electrical connection terminals 50 in each bonding region 30 are located in the overlapping region 40. Fig. 8, 9 and 10 respectively show 3 different arrangement forms of the second electrical connection terminals 50 in the second bonding regions 32, and at least part of at least 2 electrical connection terminals 50 in each second bonding region 32 are located in the overlapping region 40, since the total density of the first conductive particles 61 and the second conductive particles 62 in the overlapping region 40 is greater than the density of the conductive particles in the other non-overlapping regions 40, the overall impedance of the electrical connection terminals 50 located in the overlapping region 40 and the signal traces electrically connected with these electrical connection terminals 50 in the display region 10 is reduced, when the impedance of the signal traces in the display panel 100 is reduced, the overall voltage drop from the side close to the bonding region 30 to the side far from the bonding region 30 in the display region 10 is reduced, and thus the brightness difference from the side close to the bonding region 30 to the side far from the bonding region 30 in the display region 10 is reduced, and the display brightness uniformity of the display panel 100 is improved, thereby the display effect of the display panel 100 is improved.
In an alternative embodiment of the present invention, continuing to refer to fig. 8-10, at least a portion of the electrical connection terminals 50 overlap the overlap region 40 in the second bonding region 32.
Specifically, in the embodiments shown in fig. 8 to 10, at least a portion of at least two electrical connection terminals 50 in each second bonding region 32 overlaps with the overlapping region 40, that is, at least a portion of at least 4 electrical connection terminals 50 in the entire bonding region 30 is located in the overlapping region 40, so that the overall impedance of the electrical connection terminals 50 located in the overlapping region 40 and the signal traces electrically connected to the electrical connection terminals 50 in the display region 10 can be reduced, which is more beneficial to weakening the brightness difference from the side close to the bonding region 30 to the side far from the bonding region 30 in the display region 10, and is more beneficial to improving the display brightness uniformity of the display panel 100.
In an alternative embodiment of the invention, shown in fig. 11 is another enlarged view of the bonding areas 30 of the present application, where the entirety of the at least one electrical connection terminal 50 is located in the overlap area 40 at the second bonding area 32.
Specifically, referring to fig. 11, this embodiment shows a case where when the electrical connection terminals 50 in the second binding region 32 are arranged in the first direction, the entirety of 3 electrical connection terminals 50 is located in the overlapping region 40. When the whole of the electrical connection terminal 50 is located in the overlapping area 40, the densities of the first conductive particles 61 and the second conductive particles 62 corresponding to the whole of the electrical connection terminal 50 are increased, so that the impedance of the area corresponding to the electrical connection terminal 50 can be further reduced, and the overall impedance of the electrical connection terminal 50 located in the overlapping area 40 and the signal traces electrically connected with the electrical connection terminals 50 and located in the display area 10 is further reduced, thereby being more beneficial to improving the uniformity of the display brightness of the display panel 100.
In an alternative embodiment of the present invention, fig. 12 is a partially enlarged schematic view of an electrical connection terminal 50 provided in an embodiment of the present invention, fig. 13 is an AA' cross-sectional view of fig. 12, please refer to fig. 12 and 13, a display panel 100 includes a substrate 101, and a first metal layer S1, a second metal layer S2 and an electrode layer T1 disposed on the substrate 101, wherein, along a direction perpendicular to a plane of the substrate 101, the second metal layer S2 is disposed between the first metal layer S1 and the electrode layer T1, and the first metal layer S1 and the second metal layer S2 and the electrode layer T1 are isolated by insulating layers;
at least part of the electrical connection terminal 50 comprises a single-layer conduction region P1 and a double-layer conduction region P2, and the second metal layer S2 is electrically connected with the electrode layer T1 through a via hole in the single-layer conduction region P1; in the double-layer conducting region P2, the second metal layer S2 is electrically connected with the electrode layer T1 through a via hole, and the first metal layer S1 is electrically connected with the electrode layer T1 through a via hole.
Specifically, referring to fig. 12 and 13, in order to more clearly show the positional relationship between the first metal layer S1, the second metal layer S2 and the via hole, the electrode layer T1 is not shown in fig. 12, and only the first metal layer S1, the second metal layer S2 and the via hole are shown, in fact, in a top view, the electrode layer T1 covers the second metal layer S2 on a side away from the substrate base 101, and when the electrical connection terminal 50 is bound to an external device, the external device is electrically connected to the electrode layer T1 through conductive particles. The electrical connection terminal 50 may be divided into two areas, a single-layer conduction area P1 and a double-layer conduction area P2, respectively, as seen in a plan view. In the single-layer conducting region P1, only the second metal layer S2 is electrically connected with the electrode layer T1 through a through hole; in the double-layer conducting region P2, the second metal layer S2 is electrically connected to the electrode layer T1 through the via hole, and the first metal layer S1 is also electrically connected to the electrode layer T1 through the via hole. This application all sets up individual layer conducting area P1 and double-deck conducting area P2 for every electric connection terminal 50, has increased the quantity with the metal level that electrode layer T1 electricity is connected to be favorable to promoting the electric connection reliability of electric connection terminal 50 inside.
In an alternative embodiment of the present invention, when at least a portion of at least one electrical connection terminal 50 is located in the overlap area 40, for example, referring to fig. 8 to 10, the portion of the electrical connection terminal 50 located in the overlap area 40 is a single-layer conduction area P1 of the electrical connection terminal 50.
In the dual-layer conducting area, the second metal layer S2 is usually in a form of a thinner trace, which is shown in fig. 12 as a single-layer conducting area where the width of the second metal layer S2 is larger, and a dual-layer conducting area where the width of the second metal layer S2 is smaller. If the current of the thinner second metal layer S2 in the double-layer conduction region is larger, the second metal layer S2 with smaller width is easily blown. When at least part of the electrical connection terminal 50 is located in the overlap area 40, the single-layer conduction area of at least part of the electrical connection terminal 50 is arranged in the overlap area 40, and since the total density of the first conductive particles 61 and the second conductive particles 62 in the overlap area 40 is high, the equivalent resistance of the electrical connection terminal 50 in the single-layer conduction area is favorably reduced, so that the current pressure of the second metal layer S2 in the double-layer conduction area is favorably shared, and the conduction reliability of the electrical connection terminal 50 is favorably improved.
In an alternative embodiment of the invention, referring to fig. 14, fig. 14 is another enlarged schematic view of the bonding regions 30 in the present application, two second bonding regions 32 overlap the first bonding region 31 along an orthogonal projection perpendicular to the light exit surface of the display panel 100 and form a first overlapping region 41 and a second overlapping region 42, respectively, and an area of the electrical connection terminal 50 located in the first overlapping region 41 is not equal to an area of the electrical connection terminal 50 located in the second overlapping region 42.
Specifically, referring to fig. 14, in this embodiment, two second bonding areas 32 overlap with the first bonding area 31 to form a first overlapping area 41 and a second overlapping area 42, at least a part of 3 electrical connection terminals 50 is located in the first overlapping area 41, and at least a part of one electrical connection terminal 50 is located in the second overlapping area 42, so that the areas of the electrical connection terminals 50 disposed in the first overlapping area 41 and the second overlapping area 42 are not equal, and such a differential arrangement is beneficial to meet different resistance requirements of different electrical connection terminals 50. For example, when a certain electrical connection terminal 50 is electrically connected to a certain signal trace in the display area 10 and the impedance of the signal trace has a large influence on the uniformity of the display brightness of the display panel 100, most of the electrical connection terminal 50 electrically connected to the signal trace may be disposed in the overlapping area 40 to reduce the impedance of the electrical connection terminal 50 and the corresponding signal trace as much as possible. When the impedance of the signal trace is large and the influence on the display brightness uniformity of the display panel 100 is small, or the impedance of the signal trace is small, a small portion of the electrical connection terminal 50 electrically connected to the signal trace may be disposed in the overlapping area 40, so as to reduce the impedance of the electrical connection terminal 50 and the corresponding signal trace to a certain extent.
It should be noted that, when the signal traces in the display panel 100 have a relatively high requirement on impedance, for example, when the impedance of the signal traces is relatively large and may cause a relatively large influence on the brightness uniformity of the display area 10, the present application may set at least a portion of the electrical connection terminal 50 corresponding to the signal traces in the second binding area 32 in the overlapping area 40, and since the total concentration of the first conductive particles 61 and the second conductive particles 62 in the overlapping area 40 is relatively high and the corresponding impedance is relatively low, the impedance of the electrical connection terminal 50 in the overlapping area 40 and the signal traces corresponding to the electrical connection terminal in the display area 10 may be reduced to a certain extent, thereby facilitating to improve the display brightness uniformity of the display panel 100.
In an alternative embodiment of the present invention, the first conductive particles 61 and the second conductive particles 62 have the same particle size. Specifically, when the particle diameters of the first conductive particles 61 and the second conductive particles 62 are set to be the same, the conductive particles have good particle diameter uniformity, which is beneficial to ensure that the contact areas between the electrical connection terminals 50 and the conductive particles are consistent, maintain the same on-resistance, and simultaneously, is beneficial to avoiding the situation that part of the electrical connection terminals 50 are not contacted with the conductive particles, which causes an open circuit.
Alternatively, the particle size of the first conductive particles 61 and the second conductive particles 62 is in the range of 3 to 5 μm (including 3 μm and 5 μm), and too large conductive particles may reduce the number of particles contacted by each electrical connection terminal, and may also easily cause a short circuit due to contact of conductive particles corresponding to adjacent electrical connection terminals; too small conductive particles tend to cause the problem of particle aggregation, resulting in uneven particle distribution density.
Alternatively, the types of the first conductive particles 61 and the second conductive particles 62 are mainly metal powder and polymer plastic ball surface coating metal, such as metal powder nickel (Ni), gold (Au), gold-plated on nickel, silver, tin alloy, and the like, which is not particularly limited in this application.
In an alternative embodiment of the present invention, the display panel 100 further includes a power signal line, and the at least one electrical connection terminal 50 located at the overlap area 40 is electrically connected to the power signal line when at least a portion of the at least one electrical connection terminal 50 is located at the overlap area 40. Alternatively, in the view shown in fig. 2, the arrangement direction and the extending direction of the power signal lines are the same as those of the data lines.
Specifically, in the display area 10, each sub-pixel is electrically connected to a power supply signal line for supplying a power supply signal to the sub-pixel. Since the voltage value corresponding to the power signal directly affects the brightness of the sub-pixels, when the impedance of the power signal line is large, a significant difference occurs in the brightness of the sub-pixels in the display area 10 from the side close to the binding area 30 to the side far from the binding area 30. Therefore, when the present application is to be electrically connected to the power signal line and the electrical connection terminal located (or at least partially located) in the overlap region 40, since the total density of the first conductive particles and the second conductive particles in the overlap region is large, it is advantageous to reduce the overall impedance of the electrical connection terminal located in the overlap region and the power signal line electrically connected to the electrical connection terminal, and when the impedance of the power signal line is reduced, it is advantageous to reduce the load difference from the side close to the bonding region to the side far from the bonding region in the display region, thereby facilitating to improve the uniformity of the overall display luminance of the sub-pixels in the display region.
In an alternative embodiment of the present invention, fig. 15 is a schematic diagram illustrating a driver chip 102 and a flexible circuit board 103 bound on a display panel 100, please refer to fig. 15, in which the driver chip 102 is bound to a first binding region 11 through a first conductive layer, and the flexible circuit board 103 is bound to a second binding region 32 through a second conductive layer. Thus, the electrical connection terminals on the flexible circuit board 103 are electrically connected to the electrical connection terminals on the driving chip 102, and the output terminals on the driving chip 102 are electrically connected to the signal traces on the display panel 100, so that the electrical signals on the flexible circuit board 103 and the electrical signals on the driving chip 102 can be transmitted to the display panel 100 to control the display of the display panel 100.
Based on the same inventive concept, the present application further provides a display device 200, and fig. 16 is a schematic diagram of the display device 200 provided in the embodiment of the present application, where the display device 200 includes the display panel 100 provided in any of the above embodiments of the present application. It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product or component with practical functions such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In summary, the display panel and the display device provided by the invention at least achieve the following beneficial effects:
in the display panel and the display device provided by the invention, the binding region comprises a first binding region and a second binding region which is positioned on at least one side of the first binding region along the first direction, the first binding region and the second binding region are both covered by the conductive layer, and the first conductive layer covering the first binding region comprises a plurality of first conductive particles, so that the first binding region is bound with other components; the second conductive layer covering the second binding region includes a plurality of second conductive particles therein, thereby achieving binding of the second binding region with other components. Particularly, in the direction perpendicular to the light emitting surface of the display panel, the orthographic projections of the first binding region and the second binding region to the light emitting surface of the display panel are overlapped to form an overlapping region, and the total density of the first conductive particles and the second conductive particles contained in the overlapping region is greater than the density of the first conductive particles or the second conductive particles contained in other non-overlapping regions, so that when the total density of the conductive particles is increased, the total impedance of the conductive particles in the overlapping region is reduced, and the phenomenon that the driving of the display panel is insufficient due to the fact that the impedance of the first conductive layer and the impedance of the second conductive layer are too large is avoided. In addition, because at least one part of at least one electric connecting terminal is located the overlap region, make this electric connecting terminal and the display area with the holistic impedance of signal line that this electric connecting terminal electricity is connected obtain reducing like this, when the impedance of signal line in the display panel reduces, be favorable to reducing in the display area from being close to the whole pressure drop of one side of binding the district to keeping away from one side of binding the district, and then be favorable to reducing in the display area from being close to the luminance difference of one side of binding the district to keeping away from one side of binding the district, promote display panel and display device's display brightness uniformity, therefore be favorable to promoting display panel and display device's display effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A display panel is characterized by comprising a display area and a non-display area, wherein the display area comprises a plurality of gate lines extending along a first direction and arranged along a second direction, and a plurality of data lines arranged along the first direction and extending along the second direction, and the first direction and the second direction are intersected;
the non-display area comprises a binding area, the binding area comprises a first binding area and a second binding area positioned on at least one side of the first binding area along the first direction, the first binding area is covered with a first conductive layer, the second binding area is covered with a second conductive layer, the first conductive layer comprises a plurality of first conductive particles, and the second conductive layer comprises a plurality of second conductive particles; the second bonding region further comprises a plurality of electrical connection terminals covered by the second conductive layer;
the first binding region and the second binding region are overlapped along the orthographic projection of the direction perpendicular to the light-emitting surface of the display panel and form an overlapping region, and at least part of at least one electric connecting terminal is positioned in the overlapping region; the first bonded region includes a first region other than the overlapping region, and the second bonded region includes a second region other than the overlapping region; wherein a total density of the first conductive particles and the second conductive particles contained in the overlapping region is M0, a density of the first conductive particles contained in the first region is M1, a density of the second conductive particles contained in the second region is M2, M0 > M1, and M0 > M2.
2. The display panel according to claim 1, wherein the electrical connection terminals are arranged in the first direction, or the electrical connection terminals are arranged in the second direction, or the electrical connection terminals are arranged in a third direction, wherein the third direction intersects with the first direction and the second direction, respectively, in the second bonding region.
3. The display panel according to claim 2, wherein at least part of the electrical connection terminals overlap the overlap region at the second bonding region.
4. The display panel according to claim 2, wherein an entirety of at least one of the electrical connection terminals is located at the overlap region in the second bonding region.
5. The display panel according to claim 1, wherein the display panel comprises a substrate base plate, and a first metal layer, a second metal layer and an electrode layer which are arranged on the substrate base plate, the second metal layer is arranged between the first metal layer and the electrode layer along a direction perpendicular to a plane of the substrate base plate, and the first metal layer and the second metal layer, and the second metal layer and the electrode layer are isolated by insulating layers;
at least part of the electric connecting terminals comprise a single-layer conducting area and a double-layer conducting area, and the second metal layer is electrically connected with the electrode layer through via holes in the single-layer conducting area; the double-layer conducting area is formed by electrically connecting the second metal layer and the electrode layers through via holes, and the first metal layer and the electrode layers are electrically connected through via holes.
6. The display panel according to claim 5, wherein when at least part of at least one of the electrical connection terminals is located in the overlap region, the part of the electrical connection terminal located in the overlap region is the single-layer conduction region of the electrical connection terminal.
7. The display panel according to claim 1, wherein the display panel comprises two second bonding regions, and the two second bonding regions are respectively located at two sides of the first bonding region along the first direction.
8. The display panel according to claim 7, wherein two of the second bonding regions respectively overlap with the first bonding regions along an orthographic projection perpendicular to the light exit surface of the display panel and form a first overlapping region and a second overlapping region, and an area of the electrical connection terminal in the first overlapping region is not equal to an area of the electrical connection terminal in the second overlapping region.
9. The display panel according to claim 1, wherein the first conductive particles and the second conductive particles have the same particle size.
10. The display panel according to claim 1, wherein the display panel further comprises a power signal line, and at least one of the electrical connection terminals located in the overlapping region is electrically connected to the power signal line when at least a part of the at least one of the electrical connection terminals is located in the overlapping region.
11. The display panel according to claim 1, wherein the driving chip is bound to the first binding region through the first conductive layer, and the flexible circuit board is bound to the second binding region through the second conductive layer.
12. A display device comprising the display panel according to any one of claims 1 to 11.
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| CN111933030A (en) * | 2020-08-14 | 2020-11-13 | 昆山国显光电有限公司 | Array substrate, display panel and display device |
| CN112415818B (en) * | 2020-11-30 | 2024-02-23 | 华勤技术股份有限公司 | Display panel and electronic equipment |
| CN112687184B (en) * | 2020-12-30 | 2022-07-12 | 武汉华星光电技术有限公司 | Display module |
| CN113539101B (en) * | 2021-07-20 | 2023-05-16 | 南昌勤胜电子科技有限公司 | Array substrate, display panel and display device |
| CN114020179A (en) * | 2021-10-25 | 2022-02-08 | 惠州华星光电显示有限公司 | Electromagnetic touch display panel |
| CN115206180B (en) * | 2022-07-25 | 2023-08-01 | 武汉华星光电技术有限公司 | Display panel and display device |
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| JP2001077501A (en) * | 1999-09-03 | 2001-03-23 | Seiko Epson Corp | Flexible wiring board, optoelectronic device and electronic apparatus |
| JP4297103B2 (en) * | 2005-02-17 | 2009-07-15 | セイコーエプソン株式会社 | ELECTRO-OPTICAL DEVICE, MANUFACTURING METHOD THEREOF, AND ELECTRONIC DEVICE |
| CN106842647A (en) * | 2017-03-20 | 2017-06-13 | 武汉华星光电技术有限公司 | A kind of display device, binding structure and preparation method thereof |
| CN108803166B (en) * | 2018-07-06 | 2021-05-25 | 京东方科技集团股份有限公司 | Substrate assembly, display panel and display device |
| CN110707097B (en) * | 2019-09-23 | 2021-11-19 | 上海中航光电子有限公司 | Display module and display device |
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