CN111462687B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN111462687B CN111462687B CN202010517367.6A CN202010517367A CN111462687B CN 111462687 B CN111462687 B CN 111462687B CN 202010517367 A CN202010517367 A CN 202010517367A CN 111462687 B CN111462687 B CN 111462687B
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and can compensate fluctuation of an initial power supply signal so as to improve the light emitting reliability of a sub-pixel. The display panel includes: the display device comprises a display area and a non-display area surrounding the display area, wherein a plurality of sub-pixels are arranged in the display area; the power supply signal bus is arranged in the non-display area, is electrically connected with the sub-pixels and transmits a fixed potential signal to the sub-pixels; and the power signal bus is electrically connected with the signal transmission pins through the filter inductor part.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.
[ background of the invention ]
Organic Light-Emitting Diode (OLED) display panels are widely used due to their advantages of high brightness, low power consumption, fast response, etc.
A plurality of sub-pixels arranged in a matrix mode are arranged in a display area of the OLED display panel, and each sub-pixel comprises a pixel circuit and a light emitting diode. The positive pole of the light-emitting diode receives the driving current converted from the positive power signal and the data signal, the negative pole of the light-emitting diode receives the negative power signal, and the light-emitting diode emits light under the action of the pressure difference between the positive pole and the negative pole. Therefore, the light emitting state of the led is affected by the power signal, and if the power signal is not stable, the light emitting of the led is affected.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel, a driving method thereof, and a display device, which can compensate for fluctuations of an initial power signal, thereby improving light emitting reliability of a sub-pixel.
In one aspect, an embodiment of the present invention provides a display panel, including:
the display device comprises a display area and a non-display area surrounding the display area, wherein a plurality of sub-pixels are arranged in the display area;
the power supply signal bus is arranged in the non-display area, is electrically connected with the sub-pixels and transmits a fixed potential signal to the sub-pixels;
and the power signal bus is electrically connected with the signal transmission pins through the filter inductance part.
On the other hand, an embodiment of the present invention provides a driving method of a display panel, including:
applying a power supply signal to a signal transmission pin, compensating the fluctuation of the power supply signal by using a filter inductance part connected between the signal transmission pin and a power supply signal bus, and transmitting the compensated power supply signal to a sub-pixel electrically connected with the power supply signal bus through the power supply signal bus to drive the sub-pixel to emit light.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
One of the above technical solutions has the following beneficial effects:
by adopting the technical scheme provided by the embodiment of the invention, the filter inductance part can be used for resisting the signal fluctuation of the initial power supply signal and filtering the high-frequency noise in the initial power supply signal to remove the burrs, so that the power supply signal finally transmitted to the sub-pixel through the power supply signal bus is ensured to be a direct current signal with fixed potential, the influence of the fluctuation of the initial power supply signal on the light emission of the sub-pixel is avoided, and the light emission reliability of the sub-pixel is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a filter inductor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a film structure of a filtering metal trace according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a filter inductor according to an embodiment of the present invention;
fig. 6 is a top view of a filtering metal trace according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along line A1-A2 of FIG. 6;
fig. 8 is a schematic view of another film layer structure of a filter metal trace according to an embodiment of the present invention;
fig. 9 is a schematic view of another film structure of a filter metal trace according to an embodiment of the present invention;
fig. 10 is a schematic view of another film structure of a filter metal trace according to an embodiment of the present invention;
fig. 11 is another top view of a filtering metal trace according to an embodiment of the present invention;
fig. 12 is a schematic view of another film layer structure of a filter metal trace according to an embodiment of the present invention;
fig. 13 is a schematic view of another film structure of a filter metal trace according to an embodiment of the present invention;
FIG. 14 is a schematic diagram of a positive power signal bus according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a negative power signal bus according to an 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 ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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 terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
An embodiment of the present invention provides a display panel, as shown in fig. 1, fig. 1 is a schematic structural diagram of the display panel provided in the embodiment of the present invention, where the display panel includes: the display device comprises a display area 1 and a non-display area 2 surrounding the display area 1, wherein a plurality of sub-pixels 3 are arranged in the display area 1; a power signal bus 4 disposed in the non-display region 2, wherein the power signal bus 4 is electrically connected to the sub-pixel 3 (not shown in the figure) and transmits a fixed potential signal to the sub-pixel 3; and a filter inductor part 5 with a filter function arranged in the non-display area 2, wherein the power signal bus 4 is electrically connected with the signal transmission pin 6 through the filter inductor part 5.
When the sub-pixel 3 is driven to emit light, an initial power signal is applied to the signal transmission pin 6, and when the applied initial power signal has a burr, an initial current signal corresponding to the initial power signal during transmission can be regarded as an alternating current signal, and when the alternating current signal is transmitted to the filter inductor part 5 electrically connected to the signal transmission pin 6, based on the inductance characteristic of the filter inductor part 5, a magnetic field is generated by the alternating current signal changing with time, and the induced current generated by the magnetic field can resist the fluctuation of the alternating current signal.
Therefore, with the display panel provided by the embodiment of the present invention, the filter inductor portion 5 can be used to block the signal fluctuation of the initial power signal, and filter the high-frequency noise in the initial power signal, so as to remove the burr, thereby ensuring that the power signal finally transmitted to the sub-pixel 3 via the power signal bus 4 is a dc signal with a fixed potential, avoiding the influence of the fluctuation of the initial power signal on the light emission of the sub-pixel 3, and improving the light emission reliability of the sub-pixel 3.
In addition, it should be noted that, the display panel is further provided with a Data line Data for transmitting a Data signal to the sub-pixel 3, for a display panel with an irregular shape, taking the circular display panel shown in fig. 2 as an example, fig. 2 is another structural schematic diagram of the display panel provided in the embodiment of the present invention, when the Data line Data extends from the display area 1 to the non-display area 2 and is electrically connected to the driving chip, the Data line Data inevitably overlaps the power signal bus 4, and if the power signal transmitted on the power signal bus 4 fluctuates, the fluctuation of the power signal may cause instability of the Data signal. In the embodiment of the present invention, the filter inductor 5 is used to compensate the fluctuation of the initial power signal, so that the power signal transmitted on the power signal bus 4 is a dc signal with a fixed potential, thereby avoiding further influence on the data signal, improving the stability of data signal transmission, and further improving the light-emitting reliability of the sub-pixel 3.
Optionally, as shown in fig. 3, fig. 3 is a schematic structural diagram of the filter inductor part according to the embodiment of the present invention, where the filter inductor part 5 includes a filter metal trace 7, and the filter metal trace 7 is a surround trace that is not connected end to end. With the arrangement, the filtering metal wiring 7 can form a planar filtering inductor, when an initial power signal with burrs is transmitted to the filtering metal wiring 7, according to the maxwell electromagnetic field theory, a changing alternating current signal transmitted on the filtering metal wiring 7 can generate magnetic lines of force changing along with time, the changing magnetic lines of force generate self-induced electromotive force, the self-induced electromotive force further generates induced current, the magnetic lines of force generated by the induced current further prevent the original magnetic lines of force from changing, so that the fluctuation of the alternating current signal is blocked, and the filtering function is realized.
Further, referring to fig. 3 again, in order to increase the inductance of the filter inductor 5 and enhance the filtering effect, the filter metal trace 7 may be spiral, zigzag or annular.
Optionally, as shown in fig. 4, fig. 4 is a schematic diagram of a film layer structure of the filtering metal trace provided in the embodiment of the present invention, and the filtering metal trace 7 and the power signal bus 4 are disposed in the same layer, at this time, the filtering metal trace 7 and the power signal bus 4 may be formed by using the same patterning process, and no separate patterning process is required to be used, so that the manufacturing process is simplified, and the manufacturing cost is reduced. Moreover, the filtering metal wiring 7 does not need to occupy extra film thickness, thereby avoiding influencing the thickness of the display panel and being more beneficial to realizing the light and thin design of the display panel.
Further, as shown in fig. 5, fig. 5 is another schematic structural diagram of the filter inductor provided in the embodiment of the present invention, where the filter metal trace 7 includes a first end portion 8, a second end portion 9, and a zigzag trace segment 10 connected between the first end portion 8 and the second end portion 9, the first end portion 8 is an end portion of the filter metal trace 7 electrically connected to the power signal bus 4, and the second end portion 9 is an end portion of the filter metal trace 7 electrically connected to the signal transmission pin 6; the zigzag trace segment 10 surrounds the second end portion 9, the second end portion 9 is electrically connected with the signal transmission pins 6 through the connection trace 11, and the connection trace 11 and the zigzag trace segment 10 are arranged in different layers.
When the filtering metal wiring 7 and the power signal bus 4 are arranged on the same layer, compared with the arrangement shown in fig. 3, the zigzag wiring segment 10 does not need to be overlapped with the power signal bus 4 during the surrounding process, so that a bridge-crossing connection part does not need to be arranged, and the manufacturing process is simplified. Moreover, the connection trace 11 between the second end 9 and the signal transmission pin 6 and the zigzag trace segment 10 are arranged in different layers, and only one end of the connection trace 11 is required to be provided with a connection via hole 12 for realizing the electrical connection with the second end 9, so that the signal transmission can be realized, and the process is simple and easy to implement.
When the filter inductor part 5 includes the filter metal wiring 7, the current distribution inside the filter metal wiring 7 is not uniform due to the influence of the skin-driving effect, and the current is more likely to accumulate on the surface of the film layer where the filter metal wiring 7 is located, resulting in poor current carrying capacity of the current in the filter metal wiring 7. Therefore, as shown in fig. 6 and 7, fig. 6 is a top view of the filtering metal trace provided in the embodiment of the present invention, fig. 7 is a cross-sectional view of fig. 6 along the direction a1-a2, an insulating film layer 13 is disposed on a side of the filtering metal trace 7 opposite to the light emitting direction of the display panel, an opening structure 14 is disposed at a portion of the insulating film layer 13 overlapping with the filtering metal trace 7, and the filtering metal trace 7 is recessed in the opening structure 14, so that the filtering metal trace 7 forms an uneven surface, the surface area of the filtering metal trace 7 is increased, the current carrying capacity in the filtering metal trace 7 is increased, and the filtering capacity of the filtering metal trace 7 on the ac signal is improved.
Further, as shown in fig. 8 to 10, fig. 8 is a schematic diagram of another film layer structure of the filter metal trace provided in the embodiment of the present invention, fig. 9 is a schematic diagram of another film layer structure of the filter metal trace provided in the embodiment of the present invention, fig. 10 is a schematic diagram of another film layer structure of the filter metal trace provided in the embodiment of the present invention, the display panel further includes a substrate 15, and a buffer layer 16, an active layer 17, a first insulating layer 18, a gate layer 19, a second insulating layer 20, and a source drain layer 21 are sequentially disposed on the substrate 15 along a light emitting direction of the display panel, and the filter metal trace 7 and the source drain layer 21 are disposed at the same layer. The active layer 17, the gate layer 19, and the source-drain layer 21 are used to form a thin film transistor structure in the pixel circuit.
Based on this, in the direction perpendicular to the plane of the display panel, the opening structure 14 is disposed on the portion, overlapping the filter metal trace 7, of at least one of the buffer layer 16, the first insulating layer 18, and the second insulating layer 20, and the filter metal trace 7 is recessed in the opening structure 14.
Specifically, only a portion of the buffer layer 16, the first insulating layer 18, and the second insulating layer 20, where only one film layer overlaps the filtering metal trace 7, is provided with the opening structure 14. For example, referring to fig. 8 again, only the second insulating layer 20 has the opening structure 14 disposed therein, or only the first insulating layer 18 has the opening structure 14 disposed therein, or only the buffer layer 16 has the opening structure 14 disposed therein. It can be understood that the buffer layer 16, the first insulating layer 18, the second insulating layer 20 and the filter metal trace 7 are stacked film structures, and even if the opening structure 14 is disposed on the buffer layer 16 and the first insulating layer 18 which are not in direct contact with the filter metal trace 7, the film layers on the upper sides of the buffer layer 16 and the first insulating layer 18 still recess in the opening structure 14, so as to ensure that the filter metal trace 7 can also recess in the opening structure 14, and increase the surface area of the filter metal trace 7.
Or, the opening structure 14 is arranged at the part of the buffer layer 16, the first insulating layer 18 and the second insulating layer 20 where two film layers are overlapped with the filtering metal trace 7; for example, referring to fig. 9 again, the first insulating layer 18 and the second insulating layer 20 are provided with the opening structures 14 therein, or the second insulating layer 20 and the buffer layer 16 are provided with the opening structures 14 therein, or the first insulating layer 18 and the buffer layer 16 are provided with the opening structures 14 therein. Note that when the opening structures 14 are disposed in each of the two film layers of the buffer layer 16, the first insulating layer 18, and the second insulating layer 20, the opening structures 14 in the two film layers may overlap or may not overlap. Through set up open structure 14 in two retes, no matter whether open structure 14 in two retes overlaps, can both further increase the filtering metal and walk the superficial area of line 7 after sunken in open structure 14 to further improve the current and walk the current capacity in filtering metal walks line 7, promote filtering metal and walk the filtering effect of line 7 to alternating current signal.
Or, in order to increase the surface area of the filter metal trace 7 after being recessed in the opening structure 14 to a greater extent, please refer to fig. 10 again, the buffer layer 16, the first insulating layer 18 and the second insulating layer 20 are all provided with the opening structure 14, at this time, the opening structures 14 in the three film layers may be overlapped or may not be overlapped.
In addition, the opening structure 14 may be a through hole penetrating through the film layer, or may be a groove not penetrating through the film layer. Taking the opening structure 14 located on the second insulating layer 20 as an example, metal traces, such as the gate layer 19, are disposed in the first insulating layer 18 and the second insulating layer 20, and when no metal trace is disposed in the region opposite to the opening structure 14, the opening structure 14 may be a via structure, such that the filtering metal trace 7 is directly recessed on the surface of the first insulating layer 18 and contacts with the first insulating layer 18; when the metal wires are arranged in the region opposite to the opening structure 14, the opening structure 14 can be a groove, so that the filtering metal wires 7 cannot be contacted with the metal wires when being sunken in the opening structure 14, and the influence on the metal wires and signals transmitted on the filtering metal wires 7 is avoided.
Further, referring to fig. 6 again, in order to make the opening structure 14 have a larger length and increase the surface area of the filter metal trace 7 to a greater extent, the opening structure 14 may extend along the extending direction of the filter metal trace 7. Of course, as shown in fig. 11, fig. 11 is another top view of the filter metal trace provided in the embodiment of the present invention, and the opening structures 14 may be disposed in a disconnected state and are not connected to each other.
Optionally, as shown in fig. 12, fig. 12 is a schematic view of a further film layer structure of the filtering metal trace provided in the embodiment of the present invention, and a groove 22 is disposed on a surface of one side of the filtering metal trace 7 facing a light emitting direction of the display panel; or, as shown in fig. 13, fig. 13 is a schematic view of another film structure of the filtering metal trace provided in the embodiment of the present invention, and a protrusion 23 is disposed on a surface of one side of the filtering metal trace 7 facing a light emitting direction of the display panel. The surface area of the filtering metal wiring 7 is increased by the groove 22 or the protrusion 23, so that the influence of the skin-driving effect on the charge passing capacity can be improved, and the filtering effect of the filtering metal wiring 7 on the alternating current signal is improved.
Optionally, power signal bus 4 includes a positive power signal bus and/or a negative power signal bus.
It should be noted that the sub-pixel 3 includes a pixel circuit and a light emitting diode which are electrically connected, a positive power signal bus and a negative power signal bus are disposed in the display panel, as shown in fig. 14 and fig. 15, fig. 14 is a schematic structural diagram of the positive power signal bus provided in the embodiment of the present invention, fig. 15 is a schematic structural diagram of the negative power signal bus provided in the embodiment of the present invention, the positive power signal bus 24 is connected to the pixel circuit in the sub-pixel 3 through a positive power signal line 26 to transmit a positive power signal to the pixel circuit, and the negative power signal bus 25 is connected to a negative electrode of the light emitting diode in the sub-pixel 3 through a cathode layer 27 to transmit a negative power signal to the negative electrode of the light emitting diode.
When the light emitting diode is driven to emit light, the pixel circuit generates corresponding driving current according to the received positive power supply signal and the data signal, the driving current is transmitted to the anode of the light emitting diode, and a voltage difference is formed between the anode and the cathode of the light emitting diode, so that the light emitting diode emits light under the action of the voltage difference.
Referring to fig. 14 again, when the power signal bus 4 is a positive power signal line according to the embodiment of the present invention, the filter inductor 5 can compensate for the fluctuation of the initial positive power signal applied to the signal transmission pin 6, so that the positive power signal received by the pixel circuit is a stable dc signal with a fixed high potential, thereby improving the accuracy of the driving current converted according to the positive power signal, and further improving the reliability of light emission of the light emitting diode. And/or, referring to fig. 15 again, when the power signal bus 4 is a negative power signal line according to the embodiment of the present invention, the filter inductor 5 can compensate for the fluctuation of the initial negative power signal applied to the signal transmission pin 6, so that the negative power signal received by the cathode of the light emitting diode is a stable dc signal with a fixed high potential, thereby preventing the burr in the initial negative power signal from affecting the voltage difference between the anode and the cathode of the light emitting diode, and ensuring that the light emitting diode can emit light normally.
Optionally, the signal transmission pin 6 is used for electrically connecting with an external detection device. It is understood that before the display panel is put into use, the light emitting state of the display panel is usually detected to determine whether there is a sub-pixel 3 that cannot emit light normally, and the external detection device is a device that supplies a power signal for detection. When the display panel is detected, an external detection device applies an initial detection power supply signal to the signal transmission pin 6, the filter inductance part 5 filters the initial detection power supply signal, burrs of the initial detection power supply signal are removed, the light emitting reliability of the sub-pixel 3 during detection of the display panel is improved, and the detection accuracy is improved.
Optionally, the signal transmission pin 6 is used for electrically connecting with the power driving chip. It is understood that the power driving chip refers to a chip that supplies a power signal for display. When the display panel is driven to emit light, the power driving chip applies an initial display power supply signal to the signal transmission pin 6, the filter inductor part 5 filters the initial display power supply signal to remove burrs in the initial display power supply signal, so that the filtered display power supply signal is a stable direct current signal with a fixed potential, and the light emitting reliability of the sub-pixel 3 is improved when the display panel displays the light.
The embodiment of the invention also provides a driving method of a display panel, which comprises the following steps of, with reference to fig. 1: the power supply signal is applied to the signal transmission pin 6, the fluctuation of the power supply signal is compensated by the filter inductance part 5 connected between the signal transmission pin 6 and the power supply signal bus 4, the compensated power supply signal is transmitted to the sub-pixel 3 electrically connected with the power supply signal bus 4 through the power supply signal bus 4, and the sub-pixel 3 is driven to emit light.
The filtering principle of the filter inductor part 5 has been described in the above embodiments, and is not described herein again.
By adopting the driving method provided by the embodiment of the invention, the filter inductance part 5 can be used for blocking the signal fluctuation of the initial power supply signal and filtering the high-frequency noise in the initial power supply signal to remove the burrs, so that the power supply signal finally transmitted to the sub-pixel 3 through the power supply signal bus 4 is ensured to be a direct current signal with fixed potential, the influence of the fluctuation of the initial power supply signal on the light emission of the sub-pixel 3 is avoided, and the light emission reliability of the sub-pixel 3 is improved.
As shown in fig. 16, fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 16 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
Since the display device provided by the embodiment of the invention comprises the display panel 100, the display device can avoid the influence of the burr of the initial power supply signal on the light emission of the sub-pixel 3, and improve the light emission reliability of the sub-pixel 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. A display panel, comprising:
the display device comprises a display area and a non-display area surrounding the display area, wherein a plurality of sub-pixels are arranged in the display area;
the power supply signal bus is arranged in the non-display area, is electrically connected with the sub-pixels and transmits a fixed potential signal to the sub-pixels;
the power signal bus is electrically connected with the signal transmission pins through the filter inductance part;
the filter inductor part comprises filter metal wires which are round wires which are not connected end to end;
an insulating film layer is arranged on one side, back to the light emitting direction of the display panel, of the filtering metal wiring, an opening structure is arranged in the part, overlapped with the filtering metal wiring, of the insulating film layer, and the filtering metal wiring is sunken in the opening structure;
the display panel also comprises a substrate base plate, and a buffer layer, an active layer, a first insulating layer, a gate layer, a second insulating layer and a source drain layer are sequentially arranged on the substrate base plate along the light emergent direction of the display panel;
the filtering metal wiring and the power signal bus are arranged in the same layer, or the filtering metal wiring and the source drain layer are arranged in the same layer.
2. The display panel of claim 1, wherein the filter metal trace is spiral, loop or ring shaped.
3. The display panel according to claim 1, wherein the filter metal trace comprises a first end portion, a second end portion and a zigzag trace segment connected between the first end portion and the second end portion, the first end portion is an end portion of the filter metal trace electrically connected to the power signal bus, and the second end portion is an end portion of the filter metal trace electrically connected to the signal transmission pin;
the zigzag routing section surrounds the second end, the second end is electrically connected with the signal transmission pins through connecting routing, and the connecting routing and the zigzag routing section are arranged in different layers.
4. The display panel according to claim 1, wherein in a direction perpendicular to a plane of the display panel, an opening structure is disposed in a portion of at least one of the buffer layer, the first insulating layer, and the second insulating layer, which overlaps with the filter metal trace, and the filter metal trace is recessed in the opening structure.
5. The display panel of claim 1, wherein the opening structure extends along an extending direction of the filter metal trace.
6. The display panel according to claim 1, wherein a surface of one side of the filter metal trace facing a light emitting direction of the display panel is provided with a groove;
or, the surface of one side of the filtering metal wiring facing the light-emitting direction of the display panel is provided with a protrusion.
7. The display panel of claim 1, wherein the power signal bus comprises a positive power signal bus and/or a negative power signal bus.
8. The display panel according to claim 1, wherein the signal transmission pins are used for electrically connecting with an external detection device.
9. The display panel according to claim 1, wherein the signal transmission pins are used for electrically connecting with a power driving chip.
10. A driving method of a display panel according to any one of claims 1 to 9, comprising:
applying a power supply signal to a signal transmission pin, compensating the fluctuation of the power supply signal by using a filter inductance part connected between the signal transmission pin and a power supply signal bus, and transmitting the compensated power supply signal to a sub-pixel electrically connected with the power supply signal bus through the power supply signal bus to drive the sub-pixel to emit light.
11. A display device comprising the display panel according to any one of claims 1 to 9.
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