CN110796980B - Display panel and display device - Google Patents
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- CN110796980B CN110796980B CN201911207494.XA CN201911207494A CN110796980B CN 110796980 B CN110796980 B CN 110796980B CN 201911207494 A CN201911207494 A CN 201911207494A CN 110796980 B CN110796980 B CN 110796980B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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Abstract
The invention discloses a display panel and a display device. The display panel includes: a display region and a non-display region surrounding the display region; the non-display area comprises a binding area and a first non-display area positioned between the binding area and the display area; the display panel also comprises a plurality of sub-pixels and a plurality of power signal lines which are arranged in an array manner; each power signal line includes a first power signal line and a second power signal line extending in a column direction; the first power signal line is positioned in the first non-display area, and the second power signal line is positioned in the display area; the second power signal line is electrically connected with the plurality of sub-pixels arranged along the column direction and connected with the first end of the first power signal line, and the second end of the first power signal line is electrically connected with the binding area; the resistance per unit length of at least a part of the first power signal line is larger than the resistance per unit length of the second power signal line. The display panel provided by the embodiment of the invention can effectively solve the problem of rapid reduction of the service life of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to people such as daily life and work, and become an indispensable important tool for people at present.
However, the demands on consumer electronics have not been limited solely to functionality, but have also turned to design, artistic and good visual experience aspects, such as the flexible bendable nature of flexible display devices, making them increasingly popular.
However, the flexible display device of the related art has a problem in that the lifetime is rapidly reduced.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a display panel and a display device, which can effectively improve the problem of rapid reduction of the lifetime of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel including: a display region and a non-display region surrounding the display region; the non-display area comprises a binding area and a first non-display area positioned between the binding area and the display area; the display panel also comprises a plurality of sub-pixels and a plurality of power signal lines which are arranged in an array manner;
each of the power signal lines includes a first power signal line and a second power signal line extending in a column direction; the first power supply signal line is positioned in the first non-display area, and the second power supply signal line is positioned in the display area;
the second power signal line is electrically connected with a plurality of sub-pixels arranged along the column direction and connected with a first end of the first power signal line, and a second end of the first power signal line is electrically connected with the binding region;
the resistance per unit length of at least part of the area in the first power signal line is larger than the resistance per unit length of the second power signal line.
In a second aspect, an embodiment of the present invention further provides a display apparatus, including: the display panel of the first aspect.
The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises: a display region and a non-display region surrounding the display region; the non-display area comprises a binding area and a first non-display area positioned between the binding area and the display area; the display panel also comprises a plurality of sub-pixels and a plurality of power signal lines which are arranged in an array manner; each power signal line includes a first power signal line and a second power signal line extending in a column direction; the first power signal line is positioned in the first non-display area, and the second power signal line is positioned in the display area; the second power signal line is electrically connected with the plurality of sub-pixels arranged along the column direction and connected with the first end of the first power signal line, and the second end of the first power signal line is electrically connected with the binding area. Since the current of the display device decreases due to the increase of the impedance caused by the aging of the display device with the increase of the display time of the display panel in the prior art, the embodiment of the invention sets the resistance per unit length of at least part of the area in the first power signal line to be larger than the resistance per unit length of the second power signal line, so that the current flowing in the display device decreases due to the increase of the display time of the display panel, namely, the current in the series connection of the first power signal line and the second power signal line decreases, the resistance on the first power signal line is fixed, but the flowing current decreases, so that the partial pressure on the first power signal line decreases relatively, and the partial pressure of the second power signal line in the display area increases under the condition that the voltage difference between the anode power signal line and the cathode power signal line is unchanged, namely, the voltage of the load in the display panel increases relatively, thereby leading to the relative increase of the current in the light emitting device in the display area, namely, the attenuation speed of the current in the light emitting device is slowed down, and the problem of the service life of the display panel is effectively improved.
Drawings
FIG. 1 is a schematic view of a display panel of the prior art;
FIG. 2 is an equivalent model diagram of the display panel of FIG. 1;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is an equivalent model diagram provided by an embodiment of the present invention;
FIG. 5 is a diagram of yet another equivalent model provided by an embodiment of the present invention;
FIG. 6 is a diagram of yet another equivalent model provided by an embodiment of the present invention;
fig. 7 is a schematic view of a part of a film structure of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view of a portion of a film structure of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic view of a portion of a film structure of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic view of a portion of a film structure of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic view of a portion of a film structure of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display panel according to another embodiment of the present invention;
fig. 13 is a schematic structural view of a display panel according to another embodiment of the present invention;
fig. 14 is a schematic structural view of a display panel according to another embodiment of the present invention;
fig. 15 is a schematic structural view of a display panel according to another embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be fully described below by way of specific embodiments with reference to the accompanying drawings in the examples of the present invention. It is apparent that the described embodiments are some, but not all, embodiments of the present invention, and that all other embodiments, which a person of ordinary skill in the art would obtain without making inventive efforts, are within the scope of this invention.
Fig. 1 is a schematic structural diagram of a display panel in the prior art, fig. 2 is an equivalent model diagram of the display panel in fig. 1, and as shown in fig. 1 and 2, the conventional display panel includes a display area AA ' and a non-display area AB ', the non-display area AB ' includes a first non-display area BC ' and a binding area BB ', and a load voltage U of the display area AA AA ’＝U PVDD ’-U PVEE ' wherein U PVDD 'first supply voltage to display area AA', U PVEE 'is a second power supply voltage for forming a current loop of the light emitting device in the display area AA'. As the display time of the display panel increases, the display device ages to increase the impedance, at the first power supply voltage U PVDD ' and second supply voltage U PVEE In the 'unchanged condition, the current of the display area AA' naturally decreases, i.e. the lifetime of the display panel decreases. To solve the above problems, an embodiment of the present invention provides a display panel including: a display region and a non-display region surrounding the display region; the non-display area comprises a binding area and a first non-display area positioned between the binding area and the display area; the display panel also comprises a plurality of sub-pixels and a plurality of power signal lines which are arranged in an array manner; each power signal line includes a first power signal line and a second power signal line extending in a column direction; first oneThe power signal line is positioned in the first non-display area, and the second power signal line is positioned in the display area; the second power signal line is electrically connected with the plurality of sub-pixels arranged along the column direction and connected with the first end of the first power signal line, and the second end of the first power signal line is electrically connected with the binding area; the resistance per unit length of at least a part of the first power signal line is larger than the resistance per unit length of the second power signal line. By adopting the technical scheme, the resistance per unit length of at least part of the area in the first power supply signal line is set to be larger than the resistance per unit length of the second power supply signal line, so that although the resistance is increased due to the aging of the display device along with the increase of the display time of the display panel, namely, the current in the series connection of the first power supply signal line and the second power supply signal line is reduced, the resistance on the first power supply signal line is fixed, but the flowing current is reduced, so that the partial pressure on the first power supply signal line is relatively reduced, and under the condition that the voltage difference between the anode power supply signal line and the cathode power supply signal line is unchanged, the partial pressure of the second power supply signal line in the display area is increased, namely, the voltage of a load in the display panel is relatively increased, and then the current in the display area is relatively increased, namely, the attenuation speed of the current in the light-emitting device is slowed down, and the problem that the service life of the display panel is reduced is effectively improved.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention, referring to fig. 3, the display panel includes: a display area AA and a non-display area AB surrounding the display area AA; the non-display area AB comprises a binding area BB and a first non-display area BC positioned between the binding area BB and the display area AA; the display panel further comprises a plurality of sub-pixels and a plurality of power signal lines 10 which are arranged in an array manner; each power signal line 10 includes a first power signal line 11 and a second power signal line 12 extending in the column direction; the first power signal line 11 is located in the first non-display area BC, and the second power signal line 12 is located in the display area AA; the second power signal line 12 is electrically connected to the plurality of sub-pixels arranged in the column direction, and is connected to the first end of the first power signal line 11, and the second end of the first power signal line 11 is electrically connected to the bonding region BB; the resistance per unit length of at least a part of the area in the first power signal line 11 is larger than the resistance per unit length of the second power signal line 12.
The power signal line 10 includes an anode power signal line and/or a cathode power signal line, among others. Fig. 3 illustrates only the power supply signal line 10 as an anode power supply signal line. The second end of the first power signal line 11 is electrically connected with binding pins of the binding region BB, and the binding pins are electrically connected with the driving chip or pins on the flexible circuit board in a one-to-one correspondence manner, so that driving signals output by the driving chip reach the second power signal line 12 through the first power signal line 11, and driving signals are provided for current loops of light emitting elements in the sub-pixels through the second power signal line 12.
In the prior art, the resistance per unit length of the first power signal line 11 is the same as the resistance per unit length of the second power signal line 12, but in the present application, the resistance per unit length of at least a part of the area in the first power signal line 11 is greater than the resistance per unit length of the second power signal line 12, which is equivalent to the design of increasing the resistance of the first power signal line 11 located in the first non-display area BC.
Exemplary, FIG. 4 is an equivalent model diagram of the design of increasing resistance for the first power signal line when the power signal line is the anode power signal line, R in FIG. 4 1 The resistance is increased for the equivalent after the design of the increased resistance. Specifically, U AA ＝(U PVDD -U PVEE )-IR 1 Wherein U is PVDD First power supply voltage entering display area AA, U PVEE For the second supply voltage of the current loop forming the light emitting device unit in the display area AA, U AA Is the voltage of the load in display area AA. As the display time of the display panel increases, the display device in the display area AA ages to increase the impedance, the current I naturally decreases, and R 1 Relatively reduced partial pressure of display area AA U AA Increase, i.e. displayThe voltage of the load in the display panel is relatively increased, so that the current in the light-emitting device unit in the display area is relatively increased, namely the current decay speed in the light-emitting device is slowed down, and the problem of rapid reduction of the service life of the display panel is effectively solved.
Exemplary, FIG. 5 is an equivalent model diagram of the design of increasing resistance for the first power signal line when the power signal line is the cathode power signal line, R in FIG. 5 2 The resistance is increased for the equivalent after the design of the increased resistance. Specifically, U AA ＝(U PVDD -U PVEE )-IR 2 . As the display time of the display panel increases, the display device in the display area AA ages to increase the impedance, the current I naturally decreases, and R 2 Relatively reduced partial pressure of display area AA U AA The increase, i.e. the voltage of the load in the display panel is relatively increased, and thus the current in the light emitting device unit in the display area is relatively increased, i.e. the current decay rate in the light emitting device is slowed down, thereby effectively improving the problem of rapid reduction of the lifetime of the display panel.
Exemplary, FIG. 6 is an equivalent model diagram of the design of increasing resistance for the anode power signal line in the first non-display area and the design of increasing resistance for the cathode power signal line in the first non-display area when the power signal lines are the cathode power signal line and the anode power signal line, R in FIG. 6 1 For the equivalent increased resistance after the increased resistance design is carried out on the anode power supply signal line positioned in the first non-display area BC, R 2 The equivalent increased resistance after the increased resistance design is performed for the cathode power supply signal line located in the first non-display area BC. Specifically, U AA ＝(U PVDD -U PVEE )–IR 1 -IR 2 . As the display time of the display panel increases, the display device in the display area AA ages to increase the impedance, the current I naturally decreases, and R 1 And R is 2 Relatively reduced partial pressure of display area AA U AA The increase, i.e. the voltage of the load in the display panel is relatively increased, which in turn leads to a relative increase of the current in the light emitting device units in the display area, i.e. the current decay rate in the light emitting device is slowed down, thereby effectively improving the displayThe problem of a rapid decrease in panel life.
It should be noted that, in the embodiment of the present invention, the shapes and the sizes of the first power signal line 11 and the second power signal line 12 may be adjusted accordingly according to the actual situation, and the embodiment is not limited specifically.
It should be further noted that, for the sake of clarity of the description of the principles of the present application, the display panels of the present application are subjected to equivalent conversion, such as fig. 4, 5 and 6, but none of them is limited to the present application.
In summary, according to the technical solution of the present embodiment, by setting the resistance per unit length of at least a portion of the area in the first power signal line to be greater than the resistance per unit length of the second power signal line, although the resistance increases due to the aging of the display device as the display time of the display panel increases, that is, the current in the series connection of the first power signal line and the second power signal line decreases, the resistance on the first power signal line is fixed, but the flowing current decreases, so that the voltage division on the first power signal line relatively decreases, and under the condition that the voltage difference between the anode power signal line and the cathode power signal line is unchanged, the voltage division of the second power signal line in the display area increases, that is, the voltage of the load in the display panel relatively increases, so that the current in the light emitting device in the display area increases, that is, the decay rate of the current in the light emitting device is slowed down, thereby effectively improving the problem that the lifetime of the display panel decreases rapidly.
In actual arrangement, there are various different implementations of making the resistance per unit length of at least a part of the area in the first power signal line 11 larger than the resistance per unit length of the second power signal line 12, and this will be described in detail with typical examples. None of the following is intended to limit the invention.
Optionally, at least part of the area in the first power signal line 11 is made of polysilicon material or amorphous silicon material; the second power signal line 12 is made of a metal material.
The resistivity of the polysilicon material or the amorphous silicon material is generally 1000 Ω·m or more, and the resistivity of the metal material is generally 10 Ω·m or less. In this embodiment, at least a part of the first power signal line 11 is made of polysilicon or amorphous silicon, that is, the resistance of a part of the first power signal line 11 located in the first non-display area BC is increased by changing the material of at least a part of the first power signal line 11, so that the resistance per unit length of at least a part of the first power signal line 11 is greater than the resistance per unit length of the second power signal line 12.
Optionally, fig. 7 is a schematic view of a part of a film layer structure of a display panel according to an embodiment of the present invention, referring to fig. 7, the display panel further includes an array substrate; the array substrate includes a substrate 20, a driving circuit layer 30, and an organic light emitting element layer (not shown) disposed in this order; the driving circuit layer 30 includes an active layer 31, a first metal layer 32, a second metal layer 33, and a third metal layer 34, which are sequentially disposed; the first metal layer 32 includes a gate electrode and a first electrode of a capacitor, the second metal layer 33 includes a second electrode of the capacitor, the third metal layer 34 includes a source/drain electrode, and the second power signal line 12 is disposed on the third metal layer 34; the first power signal line 11 and the active layer 31 are at least partially formed of the same material.
The material of the active layer 31 in the driving circuit layer 30 is a material having a relatively large resistivity such as polysilicon or amorphous silicon. The materials of the first metal layer 32, the second metal layer 33, and the third metal layer 34 are metal materials having a low resistivity. In the prior art, the first power signal line 11 and the second power signal line 12 are patterned by the third metal layer 34, and the present solution is to increase the resistance value of the first power signal line 11 by forming at least a part of the first power signal line 11 and the active layer 31 in the driving circuit layer 30 in the same layer and using the same material. That is, at least part of the area of the first power signal line 11 directly uses the active layer 31 in the driving circuit layer 30, and no film layer is required to be separately arranged, so that the resistance value of the first power signal line 31 is improved, the problem of rapid reduction of the service life of the display panel is effectively improved, the cost is saved, and the process steps are simplified.
Alternatively, with continued reference to fig. 7, the first power signal line 11 includes a first sub-portion 111 and a second sub-portion 112; the first end of the first sub-portion 111 is connected with the second power signal line 12, the second end of the first sub-portion 111 is connected with the first end of the second sub-portion 112, and the second end of the second sub-portion 112 is electrically connected with the pin 40 outputting the driving signal of the binding area BB or the flexible circuit board of the binding area BB; the first sub-portion 111 and the second power signal line 12 are in the same layer and made of the same material; the second sub-portion 112 is the same layer as the active layer 31 and is made of the same material.
The driving circuit layer 30 further includes a gate insulating layer 35 between the active layer 31 and the first metal layer 32, an intermediate insulating layer 36 between the first metal layer 32 and the second metal layer 33, and an interlayer insulating layer 37 between the second metal layer 33 and the third metal layer 34. The materials of the gate insulating layer 35, the intermediate insulating layer 36, and the interlayer insulating layer 37 include silicon oxide or silicon nitride, which is not limited in the embodiment of the present invention.
The first via hole 61 and the second via hole 62 are exemplarily disposed in the gate insulating layer 35, the intermediate insulating layer 36, and the interlayer insulating layer 37 to expose the second end of the second sub-portion 112 and the first end of the second sub-portion 112, and the specific exposed area may be set according to practical situations. The pin 40 outputting the driving signal in the second bonding region BB is electrically connected to the second end of the exposed second sub-portion 112 through the first via hole 61, and the second end of the first sub-portion 111 is electrically connected to the first end of the exposed second sub-portion 112, so that at least a portion of the first power signal line 11 is layered with the active layer 31 and made of the same material, thereby increasing the resistance value of the first power signal line 11. That is, the second sub-portion 112 of the first power signal line 11 directly uses the active layer 31 in the driving circuit layer 30, and does not need to set a film layer alone to increase the resistance value of the first power signal line 31, thereby effectively improving the problem of rapid reduction of the lifetime of the display panel, saving the cost, and simplifying the process steps.
Optionally, fig. 8 is a schematic view of a partial film layer structure of a display panel according to another embodiment of the present invention, referring to fig. 8, the first power signal line 11 includes a third sub-portion 113, a fourth sub-portion 114 and a fifth sub-portion 115, a first end of the third sub-portion 113 is connected to the second power signal line 12, a second end of the third sub-portion 113 is connected to a first end of the fourth sub-portion 114, a second end of the fourth sub-portion 114 is connected to a first end of the fifth sub-portion 115, and a second end of the fifth sub-portion 115 is electrically connected to a pin 40 of an output driving signal of the bonding area BB or a flexible circuit board of the bonding area BB; the third sub-portion 113 and the fifth sub-portion 115 are the same layer as the second power signal line 12 and are made of the same material; the fourth sub-portion 114 is the same layer as the active layer 31 and is made of the same material.
Illustratively, the third via hole 63 and the fourth via hole 64 are disposed in the gate insulating layer 35, the intermediate insulating layer 36, and the interlayer insulating layer 37 to expose the second end of the fourth sub-portion 114 and the first end of the fourth sub-portion 114, and the specific exposed area may be set according to practical situations. The pin 40 outputting the driving signal in the second bonding region BB is electrically connected to the second end of the fifth sub-portion 115, the first end of the fifth sub-portion 115 is electrically connected to the exposed second end of the fourth sub-portion 114, and the second end of the third sub-portion 113 is electrically connected to the exposed first end of the fourth sub-portion 114, so that at least a portion of the first power signal line 11 is in the same layer as the active layer 31 and is made of the same material, thereby increasing the resistance value of the first power signal line 11. That is, the fourth sub-portion 114 of the first power signal line 11 directly uses the active layer 31 in the driving circuit layer 30, and does not need to separately provide a film layer to increase the resistance value of the first power signal line 31, thereby effectively improving the problem of rapid reduction of the lifetime of the display panel, saving the cost, and simplifying the process steps.
It should be noted that fig. 7 and 8 illustrate only the structure when at least a part of the area of the first power signal line 11 is arranged in the same layer as the active layer 31 in the driving circuit layer 30, but the present application is not limited thereto, and may be modified according to the actual situation, as long as the resistance value of the first power signal line 11 can be increased by using the active layer 31.
Optionally, at least part of the area in the first power signal line 11 is made of a first metal material; the second power signal line 12 is made of a second metal material; the resistivity of the first metal material is greater than the resistivity of the second metal material.
The first power signal line 11 and the second power signal line 12 in the prior art are arranged in the same layer and made of the same material. In this embodiment, the resistivity of at least a part of the first power signal line 11 is greater than that of the second power signal line 12, that is, compared with the material of the first power signal line 11 and the material of the second power signal line 12 in the prior art, the material of at least a part of the first power signal line 11 is set to have a resistivity greater than that of the first power signal line in the prior art, so as to increase the resistivity of a part of the first power signal line 11.
Optionally, fig. 9 is a schematic view of a part of a film layer structure of another display panel according to an embodiment of the present invention, and referring to fig. 9, the display panel further includes an array substrate; the array substrate includes a substrate 20, a driving circuit layer 30, and an organic light emitting layer (not shown) sequentially disposed; the driving circuit layer 30 includes an active layer 31, a first metal layer 32, a second metal layer 33, and a third metal layer 34, which are sequentially disposed; the first metal layer 32 includes a gate electrode and a first electrode of a capacitor; the second metal layer 33 comprises a second electrode of the capacitor; the third metal layer 34 includes a source and drain electrode and a second power signal line 12; the first metal layer is made of a first metal material; at least part of the first power signal line 11 is formed of the same material as the first metal layer 32.
Wherein the material of the first metal layer 32 in the prior art is molybdenum, the resistivity is about 0.54 Ω·m, the material of the third metal layer is titanium aluminum titanium, and the resistivity is about 0.07 Ω·m. In the prior art, the first power signal line 11 and the second power signal line 12 are patterned by the third metal layer 34, and the present solution is to increase the resistance value of the first power signal line 11 by forming at least a part of the first power signal line 11 and the first metal layer 32 in the driving circuit layer 30 in the same layer and using the same material. That is, at least part of the area of the first power signal line 11 directly uses the first metal layer 32 in the driving circuit layer 30, and no film layer is required to be separately arranged, so that the resistance value of the first power signal line 31 is improved, the problem of rapid reduction of the service life of the display panel is effectively improved, the cost is saved, and the process steps are simplified.
Optionally, fig. 10 is a schematic view of a part of a film layer structure of a display panel according to an embodiment of the present invention, referring to fig. 10, the display panel further includes an array substrate; the array substrate includes a substrate 20, a driving circuit layer 30, and an organic light emitting layer (not shown) sequentially disposed; the driving circuit layer 30 includes an active layer 31, a first metal layer 32, a second metal layer 33, and a third metal layer 34, which are sequentially disposed; the first metal layer 32 includes a gate electrode and a first electrode of a capacitor; the second metal layer 33 comprises a second electrode of the capacitor; the third metal layer 34 includes a source and drain electrode and a second power signal line 12; the second metal layer 33 is made of a first metal material; at least part of the first power signal line 11 and the second metal layer 33 are the same layer and made of the same material.
Wherein the material of the second metal layer 33 in the prior art is molybdenum, the resistivity is about 0.54 Ω·m, the material of the third metal layer is titanium aluminum titanium, and the resistivity is about 0.07 Ω·m. In the prior art, the first power signal line 11 and the second power signal line 12 are patterned by the third metal layer 34, and the present solution is to increase the resistance value of the first power signal line 11 by forming at least a part of the first power signal line 11 and the second metal layer 33 in the driving circuit layer 30 in the same layer and using the same material. That is, at least part of the area of the first power signal line 11 directly uses the second metal layer 33 in the driving circuit layer 30, and no film layer is required to be separately arranged, so that the resistance value of the first power signal line 31 is improved, the problem of rapid reduction of the service life of the display panel is effectively improved, the cost is saved, and the process steps are simplified.
It should be noted that fig. 9 and 10 show the structure in which at least a part of the first power signal line 11 is provided in the same layer as the first metal layer 32 or the second metal layer 33 in the driving circuit layer 30 by way of example only, but the present application is not limited thereto, and the structure may be modified according to the actual situation as long as the resistance value of the first power signal line 11 can be increased by using the first metal layer 32 or the second metal layer 33.
Fig. 11 is a schematic view of a portion of a film structure of a display panel according to another embodiment of the present invention. On the basis of the above scheme, optionally, referring to fig. 11, the first power signal line 11 and the second power signal line 12 are arranged in the same layer; the cross-sectional area of at least a part of the first power signal line 11 is smaller than the cross-sectional area of the second power signal line 12 in a direction perpendicular to the plane of the display panel.
According to r=ρl/S, where R is the resistance of the first power signal line 11, ρ is the resistivity of the first power signal line 11, L is the length of the first power signal line 11, and S is the cross-sectional area of the first power signal line 11, it is known that the resistance of the first power signal line 11 increases when the cross-sectional area of the first power signal line 11 decreases. In the prior art, the cross-sectional areas of the first power signal line 11 and the second power signal line 12 are the same, but in this embodiment, the cross-sectional area of at least a portion of the first power signal line 11 is smaller than that of the second power signal line 12, so as to increase the resistance of the first power signal line 11, and the principle of improving the problem of the rapid reduction of the lifetime of the display panel after increasing the resistance is referred to the above embodiments, which are not repeated herein.
Alternatively, the cross-sectional area of the first power signal line 11 includes a product of the width of the first power signal line 11 and the thickness of the first power signal line 11. The resistance value of the first power signal line 11 may be increased by decreasing the width of the first power signal line 11 and/or decreasing the thickness of the first power signal line 11 (see fig. 11). When the width of the first power signal line 11 is reduced, on one hand, the resistance can be increased, the problem of rapid reduction of the service life of the display panel can be effectively improved, and on the other hand, the space can be saved, thereby being beneficial to the narrow frame of the display panel.
On the basis of the above-mentioned scheme, fig. 12 is a schematic structural view of still another display panel provided in the embodiment of the present invention, referring to fig. 12, the first power signal line 11 includes a first sub power line 111 and a second sub power line 112; the first sub power line 111 extends in the row direction, and the second sub power line 112 extends in the column direction; a first end of the second sub power line 112 is electrically connected with the pin 40 outputting the driving signal of the bonding area BB, and a second end of the second sub power line 112 is connected with a first end of the first sub power line 111; the first sub power line 111 includes a plurality of first power bars 113, a plurality of first slit structures 114, a first connection portion 115, and a second connection portion 116; the first power strip 112 and the first slit structure 114 are arranged at intervals; first ends of the plurality of first power bars 113 are connected by a first connection part 115, and second ends of the plurality of first power bars 113 are connected by a second connection part 116; the second power signal line 12 is connected to the first sub power line 111 through the first connection part 115.
The first sub-power lines 111 in the prior art extend along the row direction, and the first sub-power lines 111 are of a unitary structure. In the present embodiment, the first sub power line 111 is configured as a strip structure, i.e. the first power strip 113, and the first power strips are connected together through the first connection portion 115 and the second connection portion 116, so that the output driving signal of the binding area BB sequentially passes through the second sub power line 112 and the first sub power line 111 to reach the second power signal line 12, and the power signal is provided to the current loop of the light emitting element in the sub pixel through the second power signal line 12. Since the first sub-power line 111 is provided with the plurality of first slit structures 114, which is equivalent to reducing the width of the first sub-power line 111, it can be known from the above-mentioned formula of resistance that when the width of the first sub-power line 111 is reduced, the resistance of the first sub-power line 111 is increased, so that the resistance of the first power signal line 11 is increased, and the problem of rapid reduction of the lifetime of the display panel is effectively improved. .
Note that fig. 12 illustrates the structure of the first sub power line 111, but the present embodiment is not limited thereto, and the width of the first sub power line 111 may be reduced, and the resistance value of the first sub power line 111 may be increased.
On the basis of the above-mentioned scheme, fig. 13 is a schematic structural view of still another display panel provided in the embodiment of the present invention, referring to fig. 13, the first power signal line 11 includes a first sub power line 111 and a second sub power line 112; the first sub power line 111 extends in the row direction, and the second sub power line 112 extends in the column direction; a first end of the second sub power line 112 is electrically connected with the pin 40 outputting the driving signal of the bonding area BB, and a second end of the second sub power line 112 is connected with a first end of the first sub power line 111; the second sub power line 112 is provided with a hollow structure 117; along the direction perpendicular to the plane of the display panel, the hollowed-out structure 117 penetrates the second sub-power line 112.
The second sub-power line 112 in the prior art extends along the column direction and is electrically connected to the pin 40 outputting the driving signal in the bonding area BB to receive the driving signal. In this embodiment, on the basis of the prior art, the hollowed-out structure 117 is disposed in the second sub-power line 112, which is equivalent to reducing the width of the second sub-power line 112, and similarly, when the width of the second sub-power line 112 is reduced, the resistance of the second sub-power line 112 is increased, so that the resistance of the first power signal line 11 is increased, thereby effectively improving the problem of rapid reduction of the lifetime of the display panel.
Note that fig. 13 illustrates the structure of the second sub power line 112, but the present embodiment is not limited thereto, as long as the width of the second sub power line 112 can be reduced, and the resistance value of the second sub power line 112 can be further increased.
Fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention, optionally, referring to fig. 14, on the basis that the first sub-power line 111 is provided with a plurality of first slit structures 114, a hollow structure 117 is provided in the second sub-power line 112. The resistance of the first sub power line 111 increases while the resistance of the second sub power line 112 also increases, further improving the problem of rapid reduction in the lifetime of the display panel.
Fig. 15 is a schematic structural diagram of another display panel according to an embodiment of the present invention. On the basis of the above-described scheme, optionally, referring to fig. 15, the first power signal line 11 includes a compensation resistor 50.
In this embodiment, on the basis of the prior art, a compensation resistor 50 is connected in series to the first power signal line 11 to increase the resistance of the first power signal line 11, thereby improving the problem of rapid reduction of the lifetime of the display panel.
Alternatively, the compensation resistor 50 may be located on a side close to the bonding area BB, on a side close to the second power signal line 12, or in an intermediate position of the first power signal line 11. Fig. 15 is an exemplary illustration only in which the compensation resistor 50 may be located on a side near the binding region BB.
It will be appreciated that the first power signal line 11 may be a part of an anode power signal line, a part of a cathode power signal line, or a part of an anode power signal line and a part of a cathode power signal line, so that the compensation resistor 50 may be connected in series to the anode power signal line located in the first non-display area, and/or the compensation resistor 50 may be connected in series to the cathode power signal line located in the first non-display area, which is not specifically limited in this application.
Based on the same inventive concept, the embodiment of the invention also provides a display device, and fig. 16 is a schematic structural diagram of the display device provided by the embodiment of the invention. As shown in fig. 16, the display device 200 includes the display panel 100 in the above embodiment, so the display device 200 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, and will not be described herein. The display apparatus 200 may be, for example, a mobile phone, a computer, a smart wearable device (for example, a smart watch), a vehicle-mounted display device, or an electronic display device such as a television, which is not limited in the embodiment of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (14)
1. A display panel, comprising: a display region and a non-display region surrounding the display region; the non-display area comprises a binding area and a first non-display area positioned between the binding area and the display area; the display panel also comprises a plurality of sub-pixels and a plurality of power signal lines which are arranged in an array manner;
each of the power signal lines includes a first power signal line and a second power signal line extending in a column direction; the first power supply signal line is positioned in the first non-display area, and the second power supply signal line is positioned in the display area;
the second power signal line is electrically connected with a plurality of sub-pixels arranged along the column direction and connected with a first end of the first power signal line, and a second end of the first power signal line is electrically connected with the binding region;
the resistance per unit length of at least part of the area in the first power signal line is larger than the resistance per unit length of the second power signal line.
2. The display panel according to claim 1, wherein at least a part of the first power signal line is made of a polysilicon material or an amorphous silicon material; the second power signal wire is made of metal materials.
3. The display panel of claim 1, further comprising an array substrate; the array substrate comprises a substrate, a driving circuit layer and an organic light-emitting element layer which are sequentially arranged;
the driving circuit layer comprises an active layer, a first metal layer, a second metal layer and a third metal layer which are sequentially arranged;
the first metal layer comprises a grid electrode and a first electrode of a capacitor, the second metal layer comprises a second electrode of the capacitor, the third metal layer comprises a source electrode and a drain electrode, and the second power signal line is arranged on the third metal layer;
the first power signal line of at least partial area and the active layer are the same layer and adopt the same material.
4. The display panel of claim 3, wherein the first power signal line includes a first sub-portion and a second sub-portion; the first end of the first sub-part is connected with the second power signal wire, the second end of the first sub-part is connected with the first end of the second sub-part, and the second end of the second sub-part is electrically connected with a pin of the binding area for outputting a driving signal or a flexible circuit board of the binding area;
the first sub-part and the second power signal line are in the same layer and made of the same material;
the second sub-part and the active layer are in the same layer and made of the same material.
5. The display panel according to claim 3, wherein the first power signal line includes a third sub-portion, a fourth sub-portion, and a fifth sub-portion, a first end of the third sub-portion is connected to the second power signal line, a second end of the third sub-portion is connected to the first end of the fourth sub-portion, a second end of the fourth sub-portion is connected to the first end of the fifth sub-portion, and a second end of the fifth sub-portion is electrically connected to a pin of the driving signal of the bonding area or a flexible circuit board of the bonding area;
the third sub-part and the fifth sub-part are in the same layer with the second power signal line and are made of the same material;
the fourth sub-part and the active layer are in the same layer and made of the same material.
6. The display panel according to claim 1, wherein at least a part of the first power signal line is made of a first metal material; the second power signal line is made of a second metal material; the resistivity of the first metal material is greater than the resistivity of the second metal material.
7. The display panel of claim 6, further comprising an array substrate; the array substrate comprises a substrate, a driving circuit layer and an organic light-emitting layer which are sequentially arranged;
the driving circuit layer comprises an active layer, a first metal layer, a second metal layer and a third metal layer which are sequentially arranged;
the first metal layer comprises a grid electrode and a first electrode of a capacitor;
the second metal layer comprises a second electrode of the capacitor;
the third metal layer comprises a source electrode, a drain electrode and a second power signal line;
the first metal layer is made of a first metal material;
the first power signal line and the first metal layer of at least part of the area are in the same layer and made of the same material.
8. The display panel of claim 6, further comprising an array substrate; the array substrate comprises a substrate, a driving circuit layer and an organic light-emitting layer which are sequentially arranged;
the driving circuit layer comprises an active layer, a first metal layer, a second metal layer and a third metal layer which are sequentially arranged;
the first metal layer comprises a grid electrode and a first electrode of a capacitor;
the second metal layer comprises a second electrode of the capacitor;
the third metal layer comprises a source electrode, a drain electrode and a second power signal line;
the second metal layer is made of a first metal material;
the first power signal line and the second metal layer of at least part of the area are in the same layer and made of the same material.
9. The display panel according to claim 1, wherein the first power signal line and the second power signal line are provided in the same layer; along the direction perpendicular to the plane of the display panel, the sectional area of at least part of the first power signal line is smaller than the sectional area of the second power signal line.
10. The display panel of claim 1, wherein the first power signal line comprises a first sub power line and a second sub power line; the first sub power lines extend along a row direction, and the second sub power lines extend along a column direction;
the first end of the second sub power line is electrically connected with a pin of the binding area outputting a driving signal or a flexible circuit board of the binding area, and the second end of the second sub power line is connected with the first end of the first sub power line;
the first sub power line comprises a plurality of first power strips, a plurality of first slit structures, a first connecting part and a second connecting part;
the first power strip and the first slit structure are arranged at intervals;
the first ends of the first power strips are connected through the first connecting parts, and the second ends of the first power strips are connected through the second connecting parts;
the second power signal line is connected with the first sub power line through the first connecting part.
11. The display panel of claim 1, wherein the first power signal line comprises a first sub power line and a second sub power line; the first sub power lines extend along a row direction, and the second sub power lines extend along a column direction;
the first end of the second sub power line is electrically connected with a pin of the binding area outputting a driving signal or a flexible circuit board of the binding area, and the second end of the second sub power line is connected with the first end of the first sub power line;
wherein, the second sub power line is provided with a hollowed-out structure;
along the direction perpendicular to the plane where the display panel is located, the hollowed-out structure penetrates through the second sub power line.
12. The display panel according to claim 1, wherein the power supply signal line includes an anode power supply signal line or a cathode power supply signal line.
13. The display panel of claim 1, wherein the first power signal line comprises a compensation resistor.
14. A display device comprising the display panel of any one of claims 1-13.
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| CN111430420A (en) * | 2020-04-01 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| US11355576B2 (en) | 2020-04-01 | 2022-06-07 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display panel and fabrication method thereof |
| CN111681610A (en) * | 2020-07-07 | 2020-09-18 | 京东方科技集团股份有限公司 | Display device and manufacturing method thereof |
| CN111952343B (en) * | 2020-08-21 | 2022-09-13 | 昆山国显光电有限公司 | Array substrate and display panel |
| CN113160745A (en) * | 2021-03-31 | 2021-07-23 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN113241038B (en) * | 2021-05-14 | 2022-10-04 | 深圳市华星光电半导体显示技术有限公司 | Display panel and electronic device |
| CN116324601A (en) * | 2021-07-30 | 2023-06-23 | 京东方科技集团股份有限公司 | Light-emitting substrate, backlight source and display device |
| CN114333697B (en) * | 2021-12-30 | 2023-04-07 | 深圳市华星光电半导体显示技术有限公司 | Display device |
| CN114460773B (en) * | 2022-01-27 | 2023-09-26 | 武汉华星光电技术有限公司 | Display panel to be cut, display panel and display device |
| CN114627758B (en) * | 2022-02-23 | 2023-09-01 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN107195660B (en) * | 2017-05-27 | 2020-01-07 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and display device |
| CN107863359B (en) * | 2017-11-30 | 2020-08-18 | 武汉天马微电子有限公司 | Display panel and display device |
| CN109102771B (en) * | 2018-08-27 | 2022-02-01 | 武汉天马微电子有限公司 | Display panel and display device |
| CN109817643B (en) * | 2019-01-29 | 2021-02-09 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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