CN113314580A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113314580A CN113314580A CN202110578788.4A CN202110578788A CN113314580A CN 113314580 A CN113314580 A CN 113314580A CN 202110578788 A CN202110578788 A CN 202110578788A CN 113314580 A CN113314580 A CN 113314580A
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- 239000003990 capacitor Substances 0.000 claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 62
- 229920001621 AMOLED Polymers 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
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Abstract
The invention provides a display panel and a display device. The display panel comprises a plurality of rows and columns of pixel circuits arranged on a substrate, wherein the pixel circuits comprise storage capacitors; the storage capacitor comprises a first polar plate and a second polar plate; the second plate is electrically connected to a low voltage line for providing a negative voltage signal. The invention can realize the effect of improving the influence on the stability of the control circuit of the display panel under the condition of not increasing masks, and simultaneously can greatly reduce the process cost and improve the display effect.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
The display of an AMOLED (active matrix organic light emitting diode) display panel is greatly related to the stability of a control circuit, and the control circuit of the AMOLED display panel is arranged on the basis of a PI (polyimide) flexible substrate array at present. The freely movable carriers present in the PI flexible substrate have an effect on the characteristics of the control circuitry of the AMOLED display panel (which includes all the circuitry in the display panel, including in particular the pixel circuitry located in the active display area). The current solution is to add a BSM (bottom shielding metal) layer to feed in a stable signal to achieve control of free carriers. However, this method requires an additional mask, which increases the process cost.
Disclosure of Invention
The present invention is directed to a display panel and a display device, and aims to solve the problems of the prior art that a mask needs to be added and the process cost needs to be increased while the stability of a control circuit of the display panel is improved.
The embodiment of the invention provides a display panel, which comprises a plurality of rows and columns of pixel circuits arranged on a substrate, wherein each pixel circuit comprises a storage capacitor; the storage capacitor comprises a first polar plate and a second polar plate;
the second plate is electrically connected to a low voltage line for providing a negative voltage signal.
Optionally, the display panel includes a display area and a peripheral area located at the periphery of the display area; the pixel circuit includes an organic light emitting diode;
the low voltage line includes a first voltage signal line disposed in the peripheral region; the first voltage signal line is electrically connected with the second electrode plate;
the first voltage signal line and the anode of the organic light emitting diode are positioned on the same layer.
Optionally, the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connecting lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
Optionally, the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connecting lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a second voltage signal line part arranged at the second side of the display panel;
the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
Optionally, the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connecting lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel and a second voltage signal line part arranged on a second side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively, and the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
Optionally, the display panel according to at least one embodiment of the present invention further includes a plurality of columns of second connecting lines;
the second polar plate of the storage capacitor in the pixel circuit in the same column is electrically connected with the second connecting line in the same column.
Optionally, the first electrode plate is made of a first gate metal layer, and the second electrode plate is made of a second gate metal layer;
the second connecting line is made of a source drain metal layer;
optionally, the low voltage line further includes a second voltage signal line disposed in the peripheral region; the second voltage signal line and the cathode of the organic light emitting diode are positioned on the same layer;
the first voltage signal line is electrically connected to the second voltage signal line.
The embodiment of the invention also provides a display device which comprises the display panel.
Optionally, the display device according to at least one embodiment of the present invention further includes a power management integrated circuit disposed on a third side of the display panel;
the power management integrated circuit is electrically connected with a low voltage line and is used for providing a negative voltage signal for the low voltage line.
The display panel and the display device provided by the embodiment of the invention can realize the effect of improving the influence on the stability of the control circuit of the display panel under the condition of not increasing masks, and can also greatly reduce the process cost and improve the display effect.
Drawings
Fig. 1 is a schematic diagram of charges in a PI (polyimide) flexible substrate in a display panel according to at least one embodiment of the present disclosure;
FIG. 2 is a circuit diagram of a pixel circuit in a display panel according to at least one embodiment of the invention;
fig. 3 is a schematic structural diagram of a display panel according to at least one embodiment of the invention;
fig. 4 is a schematic structural diagram of a display panel according to at least one embodiment of the invention;
fig. 5 is a cross-sectional view of the display panel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The display panel comprises a plurality of rows and columns of pixel circuits arranged on a substrate, wherein each pixel circuit comprises a storage capacitor; the storage capacitor comprises a first polar plate and a second polar plate;
the second plate is electrically connected to a low voltage line for providing a negative voltage signal.
When the substrate is a PI (polyimide) flexible substrate, since the freely movable carriers existing in the PI flexible substrate affect the stability of the control circuit of the display panel, based on this, in the display panel according to the embodiment of the present invention, the second plate is electrically connected to the low voltage line providing the negative voltage signal, so that the effect of the electric field formed by the first plate and the effect of the electric field formed by the second plate can be cancelled, the effect of the electric charge on the PI flexible substrate is reduced, and the effect of the electric charge on the stability of the control circuit of the display panel is improved. The embodiment of the invention can realize the effect of improving the influence on the stability of the control circuit of the display panel under the condition of not increasing masks, and simultaneously can greatly reduce the process cost and improve the display effect.
In a related pixel circuit design, a first plate of a storage capacitor in a pixel circuit may be located on a first gate metal layer, a second plate of the storage capacitor may be located on a second gate metal layer, and during a light emitting period, a potential of the first plate may be a high level VGH (VGH is about 7V), and the second plate of the storage capacitor is configured to be electrically connected to a low voltage line for providing a negative voltage signal, for example, the low voltage line may provide a low voltage signal VSS (VSS is a negative voltage, and is also a negative voltage signal), the voltage value of VSS may be-3V, and an electric field formed by the first gate metal layer and an electric field formed by the second gate metal layer cancel each other.
In at least one embodiment of the present invention, the display panel may be an AMOLED (active matrix organic light emitting diode) display panel.
As shown in fig. 1, reference numeral 10 is a PI flexible substrate, reference numeral 11 is an active layer, reference numeral 12 is a first gate insulating layer, reference numeral 13 is a first gate metal layer, reference numeral 14 is a second gate insulating layer, and reference numeral 15 is a second gate metal layer;
the first plate of the storage capacitor is located on the first gate metal layer 13, and the second plate of the storage capacitor is located on the second gate metal layer 15.
In at least one embodiment shown in fig. 1, in a light emitting stage, a first plate of the storage capacitor is connected to VGH, and a second plate of the storage capacitor is connected to VSS, so that an electric field of the first gate metal layer 13 and an electric field of the second gate metal layer 15 are cancelled out, an electric charge effect on the PI flexible substrate 10 is reduced, and an influence on stability of a control circuit of the display panel is improved.
Fig. 2 is a circuit diagram of a pixel circuit in a display panel according to at least one embodiment of the invention.
In fig. 2, a storage capacitor is denoted by Cst, a first transistor is denoted by T1, a second transistor is denoted by T2, a third transistor is denoted by T3, a fourth transistor is denoted by T4, a fifth transistor is denoted by T5, a sixth transistor is denoted by T6, a seventh transistor is denoted by T7, and an organic light emitting diode is denoted by O1. In fig. 2, a gate line denoted by gate (N), a Data line denoted by Data, a light-emitting control line denoted by EM, a reset control line denoted by reset (N), a high-voltage signal denoted by VDD, a low-voltage signal denoted by VSS, a first initial voltage denoted by Vinit1, and a second initial voltage denoted by Vinit 2. Wherein N is a positive integer. The pixel circuit in fig. 2 may be a pixel circuit located at the nth row.
Optionally, the display panel includes a display area and a peripheral area located at the periphery of the display area; the pixel circuit includes an organic light emitting diode;
the low voltage line includes a first voltage signal line disposed in the peripheral region; the first voltage signal line is electrically connected with the second electrode plate;
the first voltage signal line and the anode of the organic light emitting diode are positioned on the same layer.
In a specific implementation, the low voltage line may include a first voltage signal line electrically connected to the second electrode, the first voltage signal line being disposed in the peripheral region, for example, the first voltage signal line may be disposed at an upper side, a left side, and a right side of the display panel.
In at least one embodiment of the present invention, the low voltage line may include a first voltage signal line disposed in the same material as the anode layer.
In the embodiment of the present invention, a COF (chip on film) may be attached to a lower side of the display panel, a PMIC (power management integrated circuit), a source driver, a display driver integrated circuit, and the like may be disposed on the COF, and a driving circuit (which may include a gate driving circuit and a light-emitting control signal generating circuit) may be disposed on a left side and/or a right side of the display panel.
According to a specific implementation manner, the display panel according to at least one embodiment of the invention further includes a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
In an embodiment, the second plate of the storage capacitor in the same row of pixel circuits may be electrically connected to the first connecting line in the same row, and the first connecting line and the second plate may be located in the same metal layer, for example, the first connecting line and the second plate may both be located in the second gate metal layer, so as to facilitate the electrical connection between the first connecting line and the second plate. The first voltage signal line may include a first voltage signal line part disposed at a first side of the display panel, and the first voltage signal line part is electrically connected to the first connection line.
Alternatively, the display panel may include a plurality of rows of gate lines, a plurality of columns of data lines, and a plurality of rows and a plurality of columns of pixel circuits, and the first voltage signal line part may extend in substantially the same direction as the data lines.
According to another specific implementation manner, the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a second voltage signal line part arranged at the second side of the display panel;
the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
In an embodiment, the second plate of the storage capacitor in the same row of pixel circuits may be electrically connected to the first connecting line in the same row, and the first connecting line and the second plate may be located in the same metal layer, for example, the first connecting line and the second plate may both be located in the second gate metal layer, so as to facilitate the electrical connection between the first connecting line and the second plate. The first voltage signal line may include a second voltage signal line part disposed at a second side of the display panel, and the second voltage signal line part is electrically connected to the first connection line.
Alternatively, the extending direction of the second voltage signal line part may be substantially the same as the extending direction of the data line.
According to another specific implementation manner, the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel and a second voltage signal line part arranged on a second side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively, and the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
In an embodiment, the second plate of the storage capacitor in the same row of pixel circuits may be electrically connected to the first connecting line in the same row, and the first connecting line and the second plate may be located in the same metal layer, for example, the first connecting line and the second plate may both be located in the second gate metal layer, so as to facilitate the electrical connection between the first connecting line and the second plate. The first voltage signal line may include a first voltage signal line part disposed at a first side of the display panel and a second voltage signal line part disposed at a second side of the display panel, the first voltage signal line part being electrically connected to the first connection line, the second voltage signal line part being electrically connected to the first connection line.
Alternatively, the first voltage signal line part may extend in substantially the same direction as the data line, and the second voltage signal line part may extend in substantially the same direction as the data line.
In specific implementation, the display panel according to the embodiment of the invention further includes a plurality of columns of second connecting lines;
the second polar plate of the storage capacitor in the pixel circuit in the same column is electrically connected with the second connecting line in the same column.
In at least one embodiment of the present invention, the display panel further includes a plurality of rows of second connecting lines, and an extending direction of the second connecting lines may be substantially the same as an extending direction of the data lines. And the second polar plate of the storage capacitor of the pixel circuit positioned in the same column is electrically connected with the second connecting wire in the same column, so that the connecting wires between the second polar plate of the storage capacitor and the low-voltage wire are in mesh connection, and the second polar plate of the storage capacitor in each pixel circuit can be connected with a negative voltage signal.
In at least one embodiment of the present invention, the first plate may be located on the first gate metal layer, and the second plate may be located on the second gate metal layer;
the second connecting line can be positioned on the source drain metal layer;
in a specific implementation, the low voltage line may further include a second voltage signal line disposed in a peripheral region of the cathode layer;
the first voltage signal line is electrically connected to the second voltage signal line.
As shown in fig. 3, the display panel includes a display area a0 and a peripheral area located at the periphery of the display area a 0; the pixel circuit is arranged in the display area A0; the pixel circuit comprises a storage capacitor and an organic light emitting diode;
the low voltage lines include a first voltage signal line VL1 and a second voltage signal line VL2 disposed in the peripheral region; the first voltage signal line VL1 is electrically connected to the second plate Cb of the storage capacitor; the first voltage signal line VL1 is electrically connected with the second voltage signal line VL 2; the first voltage signal line VL1 and the second voltage signal line VL2 are disposed in the peripheral region;
the first voltage signal line VL1 may be located at the same layer as an anode of the organic light emitting diode; the second voltage signal line VL2 may be located at the same layer as a cathode of the organic light emitting diode;
the display panel according to at least one embodiment of the present invention further includes a plurality of rows of first connecting lines L1; the rows of first connecting lines and the second plates Cb are located in the same metal layer;
the second plates of the storage capacitors in the pixel circuits in the same row are electrically connected to the first connecting line L1 in the same row;
a first Gate On Array (Gate driver) circuit 31 is disposed On the left side of the display panel, and a second Gate On Array (GOA) circuit 32 is disposed On the right side of the display panel;
the first voltage signal line VL1 comprises a first voltage signal line part VL11 arranged at the left side of the display panel and a second voltage signal line part VL12 arranged at the right side of the display panel;
the first voltage signal line part VL11 is electrically connected to the first connection line L1 through a first via H1, and the second voltage signal line part VL12 is electrically connected to the first connection line L1 through a second via H2, so that a low voltage line is electrically connected to the second plate of the storage capacitor.
In at least one embodiment shown in fig. 3, the reference numeral B1 is a Chip On Film (COF), a PMIC (power management integrated circuit), a source driver, a display driver integrated circuit, etc. may be disposed on the COF, and a first voltage connection line L31 and a second voltage connection line L32 may be disposed between the B1 and the second voltage signal line VL2 to provide the low voltage signal VSS for the second voltage signal line VL 2.
In fig. 3, reference numeral VL3 is a first high voltage line, VL3 is electrically connected to B1 through a voltage connection line, and B1 is used for supplying a high voltage signal to VL 3;
a first Fanout region F1 is provided below VL 3.
In fig. 3, a bonding area is denoted by BA, an esd protection circuit is denoted by E1, and a lighting test circuit is denoted by E2; a second fan-out region denoted by F2 may be provided on the upper side of the display panel with a second high voltage line VL 4.
In at least one embodiment shown in fig. 3, the first side can be a left side and the second side can be a right side.
As shown in fig. 4, in at least one embodiment shown in fig. 3, the display panel further includes a plurality of columns of second connecting lines L2;
the second plates Cb of the storage capacitors in the pixel circuits in the same column are electrically connected to the second connection line L2 in the same column.
In at least one embodiment shown in FIG. 4, the rows of first connecting lines L1 and the columns of second connecting lines L2 are arranged in a grid.
Fig. 5 is a cross-sectional view of a display panel according to at least one embodiment of the invention.
In fig. 5, reference numeral 10 is a PI flexible substrate, reference numeral 11 is an active layer, reference numeral 12 is a first gate insulating layer, reference numeral 13 is a first gate metal layer, reference numeral 14 is a second gate insulating layer, reference numeral 15 is a second gate metal layer, reference numeral 16 is an interlayer dielectric layer, reference numeral 17 is a first source-drain metal layer, reference numeral 18 is a first flat layer, reference numeral 19 is a second source-drain metal layer, reference numeral 110 is a second flat layer, reference numeral 111 is an anode layer, reference numeral 112 is a pixel defining layer, and reference numeral 113 is a cathode layer.
As shown in fig. 5, the second voltage signal line located in the cathode layer 113 is overlapped with the first voltage signal line located in the anode layer 111, the first voltage signal line located in the anode layer 111 is overlapped with the connection line located on the second source-drain metal layer 19, the connection line located on the second source-drain metal layer 19 is overlapped with the connection line located on the first source-drain metal layer 17, and the connection line located on the first source-drain metal layer is overlapped with the second plate of the storage capacitor located in the second gate metal layer 15, so that the second voltage signal line is electrically connected to the second plate of the storage capacitor.
Fig. 5 is a cross-sectional view of the display panel, and a region in the middle of fig. 5 where a driving circuit is disposed does not show an active layer pattern of a thin film transistor and a pattern of each electrode included in the driving circuit.
The display device provided by the embodiment of the invention comprises the display panel.
The display device of the embodiment of the invention can also comprise a power management integrated circuit arranged at the third side of the display panel;
the power management integrated circuit is electrically connected with a low voltage line and is used for providing a negative voltage signal for the low voltage line.
Optionally, the third side may be a lower side.
The display device provided by the embodiment of the invention can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The display panel is characterized by comprising a plurality of rows and columns of pixel circuits arranged on a substrate, wherein the pixel circuits comprise storage capacitors; the storage capacitor comprises a first polar plate and a second polar plate;
the second plate is electrically connected to a low voltage line for providing a negative voltage signal.
2. The display panel according to claim 1, wherein the display panel includes a display area and a peripheral area located at a periphery of the display area; the pixel circuit includes an organic light emitting diode;
the low voltage line includes a first voltage signal line disposed in the peripheral region; the first voltage signal line is electrically connected with the second electrode plate;
the first voltage signal line and the anode of the organic light emitting diode are positioned on the same layer.
3. The display panel of claim 2, further comprising a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
4. The display panel of claim 2, further comprising a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a second voltage signal line part arranged at the second side of the display panel;
the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
5. The display panel of claim 2, further comprising a plurality of rows of first connection lines; the rows of first connecting lines and the second plates are located on the same metal layer;
the second polar plate of the storage capacitor in the pixel circuit in the same row is electrically connected with the first connecting wire in the same row; the display panel comprises a display panel and a driving circuit, wherein the driving circuit is arranged on a first side edge of the display panel and/or a second side edge of the display panel, and the first side edge and the second side edge are opposite side edges;
the first voltage signal line comprises a first voltage signal line part arranged on a first side of the display panel and a second voltage signal line part arranged on a second side of the display panel;
the first voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively, and the second voltage signal line parts are electrically connected with the plurality of rows of first connection lines, respectively.
6. The display panel according to any one of claims 3 to 5, further comprising a plurality of columns of second connection lines;
the second polar plate of the storage capacitor in the pixel circuit in the same column is electrically connected with the second connecting line in the same column.
7. The display panel of claim 6, wherein the first plate is made of a first gate metal layer and the second plate is made of a second gate metal layer;
the second connecting line is made of a source drain metal layer.
8. The display panel according to any one of claims 2 to 5, wherein the low voltage line further includes a second voltage signal line disposed in a peripheral region; the second voltage signal line and the cathode of the organic light emitting diode are positioned on the same layer;
the first voltage signal line is electrically connected to the second voltage signal line.
9. A display device comprising the display panel according to any one of claims 1 to 8.
10. The display device of claim 9, further comprising a power management integrated circuit disposed at a third side of the display panel;
the power management integrated circuit is electrically connected with a low voltage line and is used for providing a negative voltage signal for the low voltage line.
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| US20190295476A1 (en) * | 2017-10-31 | 2019-09-26 | Kunshan Go-Visionox Opto-Electronics Co., Ltd. | Pixel circuits and driving methods thereof, display devices |
| CN108288455A (en) * | 2018-03-05 | 2018-07-17 | 昆山国显光电有限公司 | Organic light emitting display panel and display device |
| US20190385541A1 (en) * | 2018-06-15 | 2019-12-19 | E Ink Holdings Inc. | Pixel circuit |
| US20210043139A1 (en) * | 2019-08-08 | 2021-02-11 | Samsung Display Co., Ltd. | Display device |
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