CN112103316A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112103316A CN112103316A CN202010968223.2A CN202010968223A CN112103316A CN 112103316 A CN112103316 A CN 112103316A CN 202010968223 A CN202010968223 A CN 202010968223A CN 112103316 A CN112103316 A CN 112103316A
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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
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
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Abstract
The embodiment of the invention discloses a display panel and a display device. The display panel includes: the liquid crystal display panel comprises a substrate, a plurality of sub-pixel units and a plurality of signal lines, wherein the sub-pixel units are arranged on the substrate; each signal line is electrically connected with a plurality of sub-pixel units arranged along a first direction; the signal line is arranged between the first auxiliary layer and the second auxiliary layer; the first auxiliary layer comprises a plurality of first auxiliary lines extending in a first direction, and the second auxiliary layer comprises a plurality of second auxiliary lines extending in the first direction; the plurality of first auxiliary lines correspond to the plurality of signal lines one by one, and the plurality of second auxiliary lines correspond to the plurality of signal lines one by one; each signal line is electrically connected with the corresponding first auxiliary line and the corresponding second auxiliary line respectively. The embodiment of the invention improves the display unevenness 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
The Organic Light Emitting Diode (OLED) display panel has the advantages of self-luminescence, short response time, high contrast, wide temperature range of use, flexible display and the like, and is widely applied.
However, the conventional OLED display panel is prone to display unevenness and other problems.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for improving the display unevenness of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the liquid crystal display panel comprises a substrate, a plurality of sub-pixel units and a plurality of signal lines, wherein the sub-pixel units are arranged on the substrate; each signal line is electrically connected with a plurality of sub-pixel units arranged along a first direction;
the signal line is arranged between the first auxiliary layer and the second auxiliary layer; the first auxiliary layer comprises a plurality of first auxiliary lines extending along a first direction, and the second auxiliary layer comprises a plurality of second auxiliary lines extending along the first direction; the plurality of first auxiliary lines correspond to the plurality of signal lines one to one, and the plurality of second auxiliary lines correspond to the plurality of signal lines one to one; each signal line is electrically connected with the corresponding first auxiliary line and the corresponding second auxiliary line respectively.
Optionally, the first auxiliary line includes a first terminal and a second terminal, the second auxiliary line includes a third terminal and a fourth terminal, and the signal line includes a fifth terminal and a sixth terminal; the first end, the third end and the fifth end are positioned on the same side of the display panel; the second end, the fourth end and the sixth end are located on the same side of the display panel;
the first end of the first auxiliary line is used for inputting an electric signal;
and the fourth end of the second auxiliary line is used for inputting an electric signal.
Optionally, an area of a cross section of the first auxiliary line perpendicular to the extending direction of the first auxiliary line is larger than an area of a cross section of the signal line perpendicular to the extending direction of the signal line, and an area of a cross section of the second auxiliary line perpendicular to the extending direction of the second auxiliary line is larger than an area of a cross section of the signal line perpendicular to the extending direction of the signal line.
Optionally, the first auxiliary line and the corresponding signal line are electrically connected through a plurality of contact points; the second auxiliary line is electrically connected to the corresponding signal line via a plurality of contact points.
Optionally, the line widths of the first auxiliary line and the second auxiliary line are both greater than the line width of the signal line.
Optionally, the line widths of the first auxiliary line and the second auxiliary line are 1-10 microns.
Optionally, a first insulating layer is included between the first auxiliary layer and the film layer where the signal line is located, and the first auxiliary layer and the signal line are electrically connected through a first through hole in the first insulating layer;
the second auxiliary layer and the film layer where the signal line is located comprise a second insulating layer, and the second auxiliary layer and the signal line are electrically connected through a second through hole in the second insulating layer.
Optionally, the first auxiliary line and the second auxiliary line are made of the same material as the signal line.
Optionally, the signal line is a power signal line or an initialization signal line.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to any embodiment of the present invention.
In the embodiment of the invention, the plurality of first auxiliary lines are in one-to-one correspondence with the plurality of signal lines, the plurality of second auxiliary lines are in one-to-one correspondence with the plurality of signal lines, and each signal line is respectively electrically connected with the corresponding first auxiliary line and the corresponding second auxiliary line, so that each signal line can be connected with one first auxiliary line and one second auxiliary line in parallel.
Drawings
Fig. 1 is a schematic top view of a display panel provided in this embodiment;
FIG. 2 is a cross-sectional view of the display panel of FIG. 1 along line AA;
FIG. 3 is a schematic top view of another display panel provided in this embodiment;
FIG. 4 is a schematic cross-sectional view of the display panel of FIG. 3 along a section line BB;
fig. 5 is a schematic diagram of a display device provided in this embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the conventional display panel is prone to display unevenness and the like. The inventors found through research that the reason why such a problem occurs is that: with the improvement of the resolution of the display panel, the smaller the pixel circuit needs to be, the smaller the signal line cross-sectional area becomes. In addition, as the size of the display panel is larger and larger, the length of the signal line is longer and longer, so that the resistance of the signal line is increased continuously, and the voltage drop on the signal line is larger and larger, so that in a plurality of sub-pixel units connected with the same signal line, the electric signals received by the sub-pixel units at different positions are different, and the display of the display panel is uneven.
In view of the above problem, the present embodiment provides a display panel, fig. 1 is a schematic top view of the display panel provided in the present embodiment, fig. 2 is a schematic cross-sectional view of the display panel in fig. 1 along a section line AA, and referring to fig. 1 and fig. 2, the display panel includes:
a substrate 10, and a plurality of sub-pixel units 20 and a plurality of signal lines 30 disposed on the substrate 10 and extending in a first direction X; each signal line 30 is electrically connected to a plurality of sub-pixel units 20 arranged along the first direction X;
the signal line structure further comprises a first auxiliary layer 40 and a second auxiliary layer 50 which are arranged on the substrate 10, wherein the film layer where the signal line 30 is located between the first auxiliary layer 40 and the second auxiliary layer 50; the first auxiliary layer 40 includes a plurality of first auxiliary lines 41 extending in the first direction X, and the second auxiliary layer 50 includes a plurality of second auxiliary lines 51 extending in the first direction X; the plurality of first auxiliary lines 41 correspond to the plurality of signal lines 30 one by one, the plurality of second auxiliary lines 51 correspond to the plurality of signal lines 30 one by one, and each signal line 30 is electrically connected to the corresponding first auxiliary line 41 and second auxiliary line 51, respectively.
Each sub-pixel unit 20 includes a light-emitting structure and a pixel driving circuit, and the pixel driving circuit is used for driving the light-emitting structure to emit light, so as to realize image display. The light emitting structure may include first and second electrodes and a light emitting function layer disposed between the first and second electrodes. The pixel driving circuit may include at least two thin film transistors and at least one capacitor, and may exemplarily include seven thin film transistors and one capacitor. Each signal line 30 is electrically connected to a pixel driving circuit. The first direction X may be a row direction of the display panel or a column direction of the display panel.
In the present embodiment, the plurality of first auxiliary lines 41 are in one-to-one correspondence with the plurality of signal lines 30, the plurality of second auxiliary lines 51 are in one-to-one correspondence with the plurality of signal lines 30, and each signal line 30 is electrically connected to the corresponding first auxiliary line 41 and second auxiliary line 51, so that each signal line 30 can be connected in parallel with one first auxiliary line 41 and one second auxiliary line 51, and since the parallel resistance of the signal line 30 and the first auxiliary line 41 and the second auxiliary line 51 is smaller than the resistance of the signal line 30, the voltage drop of the electrical signal transmitted by the signal line 30 during transmission is reduced, the magnitude of the electrical signal received by the plurality of sub-pixel units 20 connected to the signal line 30 along the first direction X is made to be close, and thus the display panel has better display uniformity.
The signal line 30 may be, for example, an initialization signal line or a power signal line. When the signal line is an initialization signal line, the signal line 30 is electrically connected to the sub-pixel unit 20, i.e., the signal line 30 is electrically connected to an initialization signal terminal of a pixel driving circuit in the sub-pixel unit 20. The initialization signal line is used for inputting an initialization signal to the pixel driving circuit to realize initialization of the pixel driving circuit. When the resistance of the signal line 30 is large, the difference between the initialization signal received by the sub-pixel unit 20 farther from the signal input end of the signal line 30 and the initialization signal received by the sub-pixel unit 20 closer to the signal input end is large, which causes the initialization degree of the pixel driving circuits of different sub-pixel units 20 to be different, so that when the same display driving signal is input, the luminance of different sub-pixel units 20 is different, which affects the display uniformity of the display panel. By arranging the first auxiliary line 41 and the second auxiliary line 51 in parallel with the signal line 30, the voltage drop of the initialization signal on the signal line 30 is reduced, so that the magnitude of the initialization signal received by different sub-pixel units 20 connected with the same signal line 30 is close, the luminance of different sub-pixel units 20 is close when the same display driving signal is input, and the display uniformity of the display panel is improved.
In addition, the pixel driving circuit includes a power supply signal input terminal, and when the signal line 30 is a power supply signal line, the signal line 30 is electrically connected to the power supply signal input terminal of the pixel driving circuit. The light emitting luminance of the sub-pixel unit 20 is related to the magnitude of the power signal. When the resistance of the signal line 30 is large, the power signal received by the sub-pixel unit 20 farther from the signal input end of the signal line 30 has a large difference with the power signal received by the sub-pixel unit 20 closer to the signal input end of the signal line 30, so that the luminance of the display panel is affected by different luminance when the same display driving signal is input by different sub-pixel units 20. By arranging the first auxiliary line 41 and the second auxiliary line 51 in parallel with the signal line 30, the voltage drop of the power signal on the signal line 30 is reduced, so that the magnitude of the power signal received by different sub-pixel units 20 connected with the same signal line 30 is close, the luminance of different sub-pixel units 20 is close when the same display driving signal is input, and the display uniformity of the display panel is improved.
It should be noted that fig. 1 only exemplarily shows a case where the vertical projection of the first auxiliary line 41 and the second auxiliary line 51 on the substrate 10 covers the vertical projection of the signal line 30 on the substrate 10, and the present invention is not limited thereto, and in other embodiments, the shapes of the first auxiliary line 41 and the second auxiliary line 51 may be set according to circuit requirements as long as the circuit traces of other film layers of the display panel are not affected.
Fig. 3 is a schematic top view of another display panel provided in this embodiment, and optionally, referring to fig. 3, the first auxiliary line 41 includes a first end and a second end; the second auxiliary line 51 includes a third end and a fourth end; the signal line 30 includes a fifth terminal and a sixth terminal;
the first end, the third end and the fifth end are positioned on the same side of the display panel; the second end, the fourth end and the sixth end are positioned on the same side of the display panel;
a first end of the first auxiliary line 41 is used for inputting an electric signal;
the fourth end of the second auxiliary line 11 is used for inputting electrical signals.
Specifically, the first end of the first auxiliary line 41 inputs an electrical signal, the electrical signal on the first auxiliary line 41 is transmitted from the first end to the second end of the first auxiliary line 41, the fourth end of the second auxiliary line 51 is used for inputting an electrical signal, and the electrical signal on the second auxiliary line 51 is transmitted from the fourth end to the third end of the second auxiliary line 51. The first end, the third end and the fifth end are positioned on the same side of the display panel; the second end, the fourth end and the sixth end are located on the same side of the display panel, and the voltage drop direction of the electrical signal on the first auxiliary line 41 is opposite to the voltage drop direction on the second auxiliary line 51, so that the voltage drop of the electrical signal injected into the signal line 30 by the first auxiliary line 41 and the voltage drop injected into the signal line 30 by the second auxiliary line 51 can be mutually cancelled, so that the electrical signals on the whole line of the signal line 30 are the same, the electrical signals received by each sub-pixel unit 20 are the same, when the same display driving signal is input, the light emitting luminance of different sub-pixel units 20 connected to the same signal line 30 is the same, and the display uniformity of the display panel is further improved.
For example, referring to fig. 3, the display panel may include two signal transmission lines 60, the two signal transmission lines 60 being opposite to the display panel, the two signal transmission lines 60 being used to input the electrical signals to the signal lines 30, respectively.
Fig. 4 is a schematic cross-sectional view of the display panel in fig. 3 along a section line BB, and alternatively, referring to fig. 4, the area of a cross-section of the first auxiliary line 41 perpendicular to the extending direction of the first auxiliary line 41 is larger than the area of a cross-section of the signal line 30 perpendicular to the extending direction of the signal line 30, and the area of a cross-section of the second auxiliary line 51 perpendicular to the extending direction of the second auxiliary line 51 is larger than the area of a cross-section of the signal line 30 perpendicular to the extending direction of the signal line 30.
Specifically, the first auxiliary layer 30 and the second auxiliary layer 40 may be independent film layers, and since there is no other circuit structure or there are fewer other circuit structures in the first auxiliary layer 30 and the second auxiliary layer 40, the cross-sectional areas of the first auxiliary lines 41 and the second auxiliary lines 51 may be set larger as needed. By the fact that the area of the cross section of the first auxiliary line 41 perpendicular to the extending direction of the first auxiliary line 41 is larger than the area of the cross section of the signal line 30 perpendicular to the extending direction of the signal line 30, and the area of the cross section of the second auxiliary line 51 perpendicular to the extending direction of the second auxiliary line 51 is larger than the area of the cross section of the signal line 30 perpendicular to the extending direction of the signal line 30, the first auxiliary line 41 and the second auxiliary line 51 have smaller resistances, and therefore after the signal line 30 is connected with the first auxiliary line 41 and the second auxiliary line 51 in parallel, voltage drop during electric signal transmission is smaller, and display uniformity of the display panel is further improved.
Alternatively, with continued reference to fig. 2, the first auxiliary lines 41 are electrically connected to the corresponding signal lines 30 through a plurality of contact points; the second auxiliary lines 51 are electrically connected to the corresponding signal lines 30 through a plurality of contact points.
Specifically, the first auxiliary line 41 is electrically connected with the signal line 30 through a plurality of contact points, the second auxiliary line 51 is electrically connected with the corresponding signal line 30 through a plurality of contact points, the signal line 30 is equal in potential to the first auxiliary line 41 and the second auxiliary line 51 at each contact point, because the resistance of the first auxiliary line 41 and the second auxiliary line 51 is small, the voltage drop of the electric signal is smaller when the electric signal is transmitted on the first auxiliary line 41 and the second auxiliary line 51, and the voltage drop of the signal line 30 at the plurality of contact points is the same as the voltage drop of the first auxiliary line 41 and the second auxiliary line 51, so that the signal transmission voltage drop on the signal line 30 is smaller, and the display uniformity of the display panel is improved.
Further, providing a plurality of contact points can prevent a single contact point from being broken due to an external force or the like, affecting the parallel characteristics of the signal line 30 and the first and second auxiliary lines 41 and 51.
Optionally, with continued reference to fig. 2, the first auxiliary layer 40 and the film layer where the signal line 30 is located include a first insulating layer 70, and the first auxiliary line 41 and the signal line 30 are electrically connected through a first via 71 in the first insulating layer 70;
the second auxiliary layer 50 and the signal line 30 include a second insulating layer 80 therebetween, and the second auxiliary line 51 and the signal line 30 are electrically connected through a second via 81 in the second insulating layer 80.
Specifically, a contact point of the first auxiliary line 41 with the signal line 30 is formed at each first through hole 71, and a contact point of the second auxiliary line 51 with the signal line 30 is formed at each second through hole 81.
In addition, only the first insulating layer 70 may be included between the first auxiliary layer 40 and the film layer where the signal line 30 is located, only the second insulating layer 80 may be included between the second auxiliary layer 50 and the film layer where the signal line 30 is located, so that the distance between the signal line 30 and the first auxiliary line 41 and the second auxiliary line 51 is small, the length of a contact point along the thickness direction of the display panel is small, a small voltage drop at the contact point is ensured, in addition, the depths of the first through hole 71 and the second through hole 81 are small, the process difficulty is reduced, and no other conductive structure exists between the first auxiliary layer 40 and the signal line 30, and between the second auxiliary layer 50 and the signal line 30, and mutual interference between signals is avoided.
Optionally, the line widths of the first auxiliary line and the second auxiliary line are both greater than the line width of the signal line.
Specifically, the resistance decreases as the area of the cross section of the first auxiliary line and the second auxiliary line increases at a constant length. By setting the line widths of the first auxiliary line and the second auxiliary line to be larger than the line width of the signal line, the first auxiliary line and the second auxiliary line are ensured to have smaller resistance, and meanwhile, the thicknesses of the first auxiliary line and the second auxiliary line are not required to be set too large, so that the first auxiliary layer and the second auxiliary layer are ensured to have smaller thicknesses, and the display panel is ensured to have smaller thicknesses.
For example, the thickness of the first auxiliary line and the second auxiliary line may be the same as the thickness of the signal line.
Optionally, the line widths of the first auxiliary line and the second auxiliary line are 1-10 micrometers.
Specifically, when the line widths of the first auxiliary line and the second auxiliary line are too small, the resistances of the first auxiliary line and the second auxiliary line are large, and when the line widths are too large, interference with other conductive structures in the display panel may occur, and by setting the line widths of the first auxiliary line and the second auxiliary line to be 1-10 micrometers, the first auxiliary line and the second auxiliary line are ensured to have smaller resistances, so that the voltage drop of electric signal transmission is reduced to a large extent, and the interference between the first auxiliary line and the second auxiliary line and other conductive structures can be avoided better.
Optionally, the first auxiliary lines and the second auxiliary lines may be made of the same material as the signal lines, so that the material cost of the display panel is reduced. Illustratively, the material used for the first auxiliary line and the second auxiliary line may be copper, silver or molybdenum.
Fig. 5 is a schematic diagram of a display device provided in this embodiment, and referring to fig. 5, a display device 100 includes a display panel 200 according to any embodiment of the present invention. The display device 100 may be a mobile phone, a tablet, or the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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 modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel, comprising:
the liquid crystal display panel comprises a substrate, a plurality of sub-pixel units and a plurality of signal lines, wherein the sub-pixel units are arranged on the substrate; each signal line is electrically connected with a plurality of sub-pixel units arranged along a first direction;
the signal line is arranged between the first auxiliary layer and the second auxiliary layer; the first auxiliary layer comprises a plurality of first auxiliary lines extending along a first direction, and the second auxiliary layer comprises a plurality of second auxiliary lines extending along the first direction; the plurality of first auxiliary lines correspond to the plurality of signal lines one to one, and the plurality of second auxiliary lines correspond to the plurality of signal lines one to one; each signal line is electrically connected with the corresponding first auxiliary line and the corresponding second auxiliary line respectively.
2. The display panel according to claim 1, characterized in that:
the first auxiliary line includes a first terminal and a second terminal, the second auxiliary line includes a third terminal and a fourth terminal, and the signal line includes a fifth terminal and a sixth terminal; the first end, the third end and the fifth end are positioned on the same side of the display panel; the second end, the fourth end and the sixth end are located on the same side of the display panel;
the first end of the first auxiliary line is used for inputting an electric signal;
and the fourth end of the second auxiliary line is used for inputting an electric signal.
3. The display panel according to claim 1, characterized in that:
an area of a cross section of the first auxiliary line perpendicular to an extending direction of the first auxiliary line is larger than an area of a cross section of the signal line perpendicular to an extending direction of the signal line, and an area of a cross section of the second auxiliary line perpendicular to an extending direction of the second auxiliary line is larger than an area of a cross section of the signal line perpendicular to an extending direction of the signal line.
4. The display panel according to claim 3, wherein:
the first auxiliary line is electrically connected with the corresponding signal line through a plurality of contact points; the second auxiliary line is electrically connected to the corresponding signal line via a plurality of contact points.
5. The display panel according to claim 3, wherein:
the line widths of the first auxiliary line and the second auxiliary line are both larger than the line width of the signal line.
6. The display panel according to claim 5, wherein:
the line width of the first auxiliary line and the second auxiliary line is in the range of 1-10 microns.
7. The display panel according to claim 1, characterized in that:
the first auxiliary layer and the film layer where the signal line is located comprise a first insulating layer, and the first auxiliary line and the signal line are electrically connected through a first through hole in the first insulating layer;
the second auxiliary layer and the film layer where the signal line is located comprise a second insulating layer, and the second auxiliary layer and the signal line are electrically connected through a second through hole in the second insulating layer.
8. The display panel according to claim 1, characterized in that:
the first auxiliary line and the second auxiliary line are made of the same material as the signal line.
9. The display panel according to claim 1, characterized in that:
the signal line is a power supply signal line or an initialization signal line.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010968223.2A CN112103316B (en) | 2020-09-15 | 2020-09-15 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010968223.2A CN112103316B (en) | 2020-09-15 | 2020-09-15 | Display panel and display device |
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| CN112103316A true CN112103316A (en) | 2020-12-18 |
| CN112103316B CN112103316B (en) | 2023-08-01 |
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| CN112785978A (en) * | 2021-03-10 | 2021-05-11 | 合肥维信诺科技有限公司 | Array substrate |
| CN113809098A (en) * | 2021-08-24 | 2021-12-17 | 武汉天马微电子有限公司 | Display substrate, display panel and display device |
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| CN113809098B (en) * | 2021-08-24 | 2024-04-09 | 武汉天马微电子有限公司 | Display substrate, display panel and display device |
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| CN112103316B (en) | 2023-08-01 |
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