CN108154842B - Organic light-emitting display panel and electronic equipment - Google Patents
Organic light-emitting display panel and electronic equipment Download PDFInfo
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- CN108154842B CN108154842B CN201810009000.6A CN201810009000A CN108154842B CN 108154842 B CN108154842 B CN 108154842B CN 201810009000 A CN201810009000 A CN 201810009000A CN 108154842 B CN108154842 B CN 108154842B
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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]
Abstract
The embodiment of the invention discloses an organic light-emitting display panel and electronic equipment, wherein the organic light-emitting display panel comprises: the liquid crystal display device comprises a light emitting structure, a pixel circuit structure electrically connected with the light emitting structure, and a first signal line for providing a pulse signal to the pixel circuit structure; the pixel circuit structure comprises a driving transistor and a first signal area electrically connected with the driving transistor; the pixel circuit structure further includes a shielding structure between the first signal region and the first signal line, the shielding structure having a fixed potential. In the embodiment of the invention, the shielding structure with the fixed potential is arranged between the first signal area and the first signal line, so that the coupling between the first signal line and the first signal area can be shielded, and further, the crosstalk of the signal coupling between the first signal line and the first signal area to the light-emitting structure is reduced, and the poor display of the organic light-emitting display panel is improved.
Description
Technical Field
Embodiments of the present invention relate to display technologies, and in particular, to an organic light emitting display panel and an electronic device.
Background
An Organic Light-Emitting Diode (OLED) display device is a self-luminous display device in which an Organic Light-Emitting layer located between a cathode and an anode is used as a Light-Emitting body, and has advantages of being ultra-thin, high in brightness, high in Light-Emitting efficiency, good in shock resistance, and the like.
The organic light emitting diode display device comprises a plurality of light emitting devices and pixel driving circuits arranged corresponding to the light emitting devices, and further comprises a plurality of data signal lines, wherein one data signal line is electrically connected with one row of pixel driving circuits. The data signal line overlaps with a row of corresponding pixel driving circuits, and a data voltage signal output by the data signal line is a pulse signal, so that crosstalk is easily caused to the pixel driving circuits by potential jump of the data signal line, and the display effect of the organic light emitting diode display device is further influenced.
Disclosure of Invention
The embodiment of the invention provides an organic light-emitting display panel and electronic equipment, which are used for reducing crosstalk.
In a first aspect, an embodiment of the present invention provides an organic light emitting display panel, including:
the liquid crystal display device comprises a light emitting structure, a pixel circuit structure electrically connected with the light emitting structure, and a first signal line for providing a pulse signal to the pixel circuit structure;
the pixel circuit structure comprises a driving transistor and a first signal area electrically connected with the driving transistor;
the pixel circuit structure further includes a shielding structure between the first signal region and the first signal line, wherein the shielding structure has a fixed potential.
In a second aspect, embodiments of the present invention also provide an electronic device, which includes the organic light emitting display panel described above.
In the embodiment of the invention, the shielding structure with fixed potential is arranged between the first signal area and the first signal line, so that the shielding effect can be achieved, and the potential jump of the pulse signal output by the first signal line does not influence the potential of the shielding structure; the shielding structure is a fixed potential, the potential of the first signal area cannot be influenced by the shielding structure, and after the shielding structure is arranged, the potential jump of the pulse signal output by the first signal line cannot influence the potential of the first signal area. In the embodiment of the invention, based on the shielding effect of the shielding structure, the potential of the first signal area electrically connected with the driving transistor of the pixel circuit structure is not influenced by the potential jump of the first signal line, so that the potential of the driving transistor is not influenced, and the crosstalk of the signal coupling of the first signal line and the first signal area to the light-emitting structure is further reduced, thereby improving the poor display of the organic light-emitting display panel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are 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 diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a pixel circuit structure in the organic light emitting display panel of fig. 1;
fig. 3 is a schematic diagram of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 4 is a schematic diagram of a pixel circuit structure of the organic light emitting display panel of fig. 1;
FIG. 5 is a schematic diagram of a pixel circuit structure of the organic light emitting display panel of FIG. 1;
fig. 6 is a schematic diagram of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 7 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 8 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 9 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 10 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 11 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 12 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 13 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1;
fig. 14 is a schematic view of a pixel circuit structure of the organic light emitting display panel of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Fig. 1 is a schematic diagram of an organic light emitting display panel according to an embodiment of the present invention. Fig. 2 is a circuit diagram of a pixel circuit structure in the organic light emitting display panel corresponding to fig. 1. Fig. 3 is a schematic diagram of a pixel circuit structure in the organic light emitting display panel corresponding to fig. 1. The organic light emitting display panel provided by the embodiment includes: a light emitting structure 10, a pixel circuit structure 20 electrically connected to the light emitting structure 10, and a first signal Line1 supplying a pulse signal to the pixel circuit structure 20; the pixel circuit structure 20 includes a driving transistor Tc, and a first signal region Q1 electrically connected to the driving transistor Tc; the pixel circuit structure 20 further includes a shield structure 30 located between the first signal region Q1 and the first signal Line1, wherein the shield structure 30 has a fixed potential.
In this embodiment, the organic light emitting display panel includes a light emitting structure 10, where the light emitting structure 10 at least includes an anode 11, an organic light emitting layer 12, and a cathode 13, and the anode 11 and the cathode 13 of any two adjacent light emitting structures 10 are disposed in an insulating manner. The anode 11 is an independent electrode, that is, one anode 11 is correspondingly disposed on each light emitting structure 10, and the optional cathode 13 is a planar electrode, that is, one cathode 13 is shared by a plurality of light emitting structures 10.
The light emitting structure 10 provided in the present embodiment has the following light emitting principle: applying a positive voltage to the anode 11 and a negative voltage to the cathode 13 corresponding to the light emitting structure 10, holes generated by the anode 11 of the light emitting structure 10 are injected into the organic light emitting layer 12 of the light emitting structure 10, electrons generated by the cathode 13 are injected into the organic light emitting layer 12, the electrons and holes injected into the organic light emitting layer 12 of the light emitting structure 10 are combined and excite light emitting molecules in the organic light emitting layer 12 to generate excitons, and the excitonic radiation transition causes the light emitting structure 10 to emit light.
As shown in fig. 1 and 2, each light emitting structure 10 is electrically connected to the pixel circuit structure 20. Specifically, the anode 11 of each light emitting structure 10 is electrically connected to the drain of the light emission control transistor Tg of the corresponding pixel circuit structure 20, and the source of the light emission control transistor Tg is electrically connected to the drain of the driving transistor Tc. The first SCAN signal line SCAN1 through the third SCAN signal line SCAN3 control whether the pixel circuit structure 20 operates or not. In the light emitting stage, the light emitting control transistor Tg is in an on state, the on or off state of the driving transistor Tc determines whether the light emitting structure 10 emits light, when the driving transistor Tc is in the on state, the driving transistor Tc can drive the light emitting structure 10 to emit light, and when the driving transistor Tc is in the off state, the light emitting structure 10 does not emit light.
As described above, the data signal line is electrically connected to the pixel circuit structure 20 and transmits a data voltage signal to the pixel circuit structure 20, and the scan signal line is electrically connected to the pixel circuit structure 20 and transmits a scan voltage signal to the pixel circuit structure 20, where the data voltage signal and the scan voltage signal are both pulse signals. A data signal line is generally electrically connected to a column of pixel circuit structures 20, a scan signal line is generally electrically connected to a row of pixel circuit structures 20, and the data signal line is electrically connected to each corresponding pixel circuit structure 20 and overlaps or is disposed adjacent to a signal region in the pixel circuit structure 20, and the scan signal line is electrically connected to each corresponding pixel circuit structure 20 and overlaps or is disposed adjacent to a signal region in the pixel circuit structure 20. The signal region described herein is a region in which a signal flows, which is provided in the pixel circuit structure 20 so as to overlap or be adjacent to a data signal line (or a scanning signal line).
In this embodiment, the data signal Line for supplying the pulse signal to the pixel circuit structure 20 may be selected as the first signal Line1, and the signal region electrically connected to the driving transistor Tc in the pixel circuit structure 20 may be selected as the first signal region Q1. Alternatively, the scanning signal Line that supplies the pulse signal to the pixel circuit structure 20 may be selected as the first signal Line1, and the signal region electrically connected to the driving transistor Tc in the pixel circuit structure 20 may be selected as the first signal region Q1. As shown in fig. 2, the optional first signal region Q1 is electrically connected to the gate of the driving transistor Tc.
When the signal output from the first signal Line1 is a pulse signal and the first signal Line1 overlaps or is disposed adjacent to the first signal region Q1, signal coupling is likely to occur between the first signal Line1 and the first signal region Q1, which causes crosstalk. The influence of the crosstalk on the organic light emitting display panel is negative.
Take the first signal region Q1 shown in fig. 2 as an example. When the signal output by the first signal Line1 is at a high level, the coupling between the first signal Line1 and the first signal region Q1 causes the voltage level of the first signal region Q1 to increase, i.e., the gate voltage level of the driving transistor Tc (P-type transistor) to increase, and the driving transistor Tc in the on state may be turned off, which may cause the light emitting structure 10 not to emit light during the light emitting period, thereby affecting the display effect of the organic light emitting display panel. When the signal output by the first signal Line1 is at a low level, the coupling between the first signal Line1 and the first signal region Q1 causes the potential of the first signal region Q1 to decrease, i.e., the gate potential of the driving transistor Tc (P-type transistor) to decrease, and the driving transistor Tc in the off state may be turned on, which may cause the light emitting structure 10 to emit light, i.e., to be turned on during the non-light emitting period, thereby affecting the display effect of the organic light emitting display panel.
It can be seen that, when the first signal region Q1 is a signal region electrically connected to the driving transistor Tc in the pixel circuit structure 20, the signal coupling between the first signal Line1 and the first signal region Q1 may cause crosstalk to the light emitting structure 10, thereby causing poor display of the organic light emitting display panel.
In order to reduce crosstalk, referring to fig. 3, the pixel circuit structure 20 of the organic light emitting display panel further includes a shield structure 30 between the first signal region Q1 and the first signal Line1, wherein the shield structure 30 has a fixed potential.
The shield structure 30 is located between the first signal region Q1 and the first signal Line1, and the shield structure 30 and the first signal Line1 are easy to generate signal coupling, but because the shield structure 30 has a fixed potential, a jump in the potential of the signal output from the first signal Line1 does not affect the potential of the shield structure 30. Although signal coupling is easily generated between the shield structure 30 and the first signal region Q1, the shield structure 30 does not affect the potential of the first signal region Q1 because the shield structure 30 has a fixed potential. Therefore, after the shielding structure 30 is provided, the potential jump of the pulse signal output by the first signal Line1 does not affect the potential of the first signal region Q1, and the potential of the driving transistor Tc electrically connected to the first signal region Q1 is not affected, so that the crosstalk of the signal coupling between the first signal Line1 and the first signal region Q1 to the light emitting structure 10 is reduced, and the display defect of the organic light emitting display panel is improved.
It can be understood by those skilled in the art that the pixel circuit structure includes, but is not limited to, the structure shown in fig. 2, and the relative position relationship between the first signal line and the pixel circuit structure is different in different organic light emitting display panel structures, and the first signal area may also be different, and is not specifically limited and described in the present invention.
It will be understood by those skilled in the art that fig. 3 simply shows the relative position relationship of the first signal line, the first signal region in the pixel circuit structure and the shielding structure, so as to facilitate the explanation of the position relationship of the shielding structure, and hereinafter, in order to clearly explain the position relationship of the shielding structure, only the first signal line, the first signal region and the shielding structure are shown in the drawings, but in practice, the organic light emitting display panel further includes other signal lines, devices and the like, which are not shown again.
As can be understood by those skilled in the art, the first signal region may also be another signal region in the pixel circuit structure, but in the conventional organic light emitting display panel, the distance between the signal region electrically connected to the driving transistor and the data signal line (or the scanning signal line) in the pixel circuit structure is relatively small, and the crosstalk is relatively large, so in this embodiment, it is preferable that the first signal region is a signal region electrically connected to the driving transistor, and a shielding structure is disposed between the first signal region and the first signal line, so that the crosstalk can be greatly reduced, and the effect of improving the crosstalk is relatively obvious. Of course, when the relevant practitioner finds other first signal regions in the pixel circuit structure that may generate crosstalk, a shielding structure may be provided between the other first signal regions and the first signal line, and crosstalk may also be improved.
In this embodiment, the shielding structure with a fixed potential is disposed between the first signal region and the first signal line, and can play a role in shielding, and the potential jump of the pulse signal output by the first signal line does not affect the potential of the shielding structure; the shielding structure is a fixed potential, the potential of the first signal area cannot be influenced by the shielding structure, and after the shielding structure is arranged, the potential jump of the pulse signal output by the first signal line cannot influence the potential of the first signal area. In this embodiment, based on the shielding effect of the shielding structure, the potential of the first signal region electrically connected to the driving transistor of the pixel circuit structure is not affected by the potential jump of the first signal line, and the potential of the driving transistor is not affected, so that the crosstalk of the signal coupling between the first signal line and the first signal region to the light emitting structure is reduced, and the display defect of the organic light emitting display panel is improved.
Alternatively, as shown in fig. 3, the first signal region Q1, the shielding structure 30, and the first signal Line1 are stacked and insulated in this order. In the embodiment, the optional first signal region Q1 and the first signal Line1 are stacked, and signal coupling is easily generated between the first signal region Q1 and the first signal Line1 in the direction Y perpendicular to the organic light emitting display panel, which causes crosstalk. Based on this, by disposing the shielding structure 30 between the first signal region Q1 and the first signal Line1, the shielding structure 30 having a fixed potential can shield the signal coupling between the first signal region Q1 and the first signal Line1, thereby reducing crosstalk of the signal coupling of the first signal Line1 and the first signal region Q1 to the light emitting structure 10, and improving display defects of the organic light emitting display panel.
Alternatively, as shown in fig. 3, in the direction Y perpendicular to the organic light emitting display panel, the first signal region Q1 overlaps the first signal Line1, and the shielding structure 30 covers the overlapping region of the first signal region Q1 and the first signal Line 1. Optionally, the shielding structure 30 covers at least a part of the first signal region Q1 and/or a part of the first signal Line 1. Wherein the optional shielding structure 30 covers at least the first signal region Q1 as shown in fig. 4; the optional shield structure 30 as shown in fig. 5 covers at least the first signal Line 1; the optional shield structure 30 as shown in fig. 6 covers at least the first signal region Q1 and the first signal Line 1; as shown in fig. 7, the optional shielding structure 30 covers at least a portion of the first signal region Q1 and at least a portion of the first signal Line 1.
The overlapping region of the first signal region Q1 and the first signal Line1 easily forms parasitic capacitance in the direction Y perpendicular to the organic light emitting display panel, causing crosstalk. Based on this, the shielding structure 30 having a fixed potential is disposed between the first signal region Q1 and the first signal Line1 and covers the overlapping region of the first signal region Q1 and the first signal Line1, and the shielding structure 30 having a fixed potential can shield the signal coupling between the first signal region Q1 and the first signal Line1, reduce parasitic capacitance, and further reduce crosstalk of the signal coupling of the first signal Line1 and the first signal region Q1 to the light emitting structure 10, thereby improving display defects of the organic light emitting display panel.
Alternatively, the first signal region Q1, the shielding structure 30, and the first signal Line1 are stacked in this order and insulated. Alternatively, as shown in fig. 8 to 10, the first signal region Q1 does not overlap the first signal Line1 in the direction Y perpendicular to the organic light emitting display panel; in the direction X in which the first signal region Q1 points toward the first signal Line1, the shielding structure 30 is located between the first signal region Q1 and the first signal Line1 and covers at least a portion of the first signal region Q1 and/or a portion of the first signal Line 1. As shown in fig. 8, the shielding structure 30 is located between the first signal region Q1 and the first signal Line1 and covers at least a part of the first signal region Q1 and a part of the first signal Line 1. As shown in fig. 9, the shielding structure 30 is located between the first signal region Q1 and the first signal Line1 and covers at least a part of the first signal region Q1. As shown in fig. 10, the shielding structure 30 is located between the first signal region Q1 and the first signal Line1 and covers at least a part of the first signal Line 1.
In this embodiment, although the first signal region Q1 and the first signal Line1 are located at different layers, the first signal region Q1 and the first signal Line1 are adjacently disposed in the direction X in which the first signal region Q1 points toward the first signal Line1, and signal coupling may still occur between the first signal region Q1 and the first signal Line 1. Based on this, in the direction X in which the first signal region Q1 points toward the first signal Line1, the shield structure 30 having a fixed potential is disposed between the first signal region Q1 and the first signal Line1 and the shield structure 30 covers at least a part of the first signal region Q1 and a part of the first signal Line 1. The shielding structure 30 having a fixed potential can shield the signal coupling between the first signal region Q1 and the first signal Line1, thereby reducing crosstalk of the signal coupling of the first signal Line1 and the first signal region Q1 to the light emitting structure 10, thereby improving display defects of the organic light emitting display panel.
On the basis of any of the above embodiments, the optional first signal Line1 supplies the data voltage signal to the pixel circuit structure 20; the first signal region Q1 is electrically connected to the gate of the driving transistor Tc, and/or the first signal region Q1 is electrically connected to the polysilicon layer of the driving transistor Tc. I.e., the optional data signal Line is the first signal Line 1.
On the basis of any of the above embodiments, the optional first signal Line1 supplies a gate voltage signal to the pixel circuit structure 20; the first signal region Q1 is electrically connected to the gate of the driving transistor Tc, and/or the first signal region Q1 is electrically connected to the polysilicon layer of the driving transistor Tc. That is, the scanning signal Line can be selected as the first signal Line 1.
For the case where the first signal region is electrically connected to the polysilicon layer of the drive transistor Tc. It is known that the first signal Line1 is easily coupled to the first signal region, and the potential jump of the output signal of the first signal Line1 causes the potential jump of the first signal region, and the potential jump of the polysilicon layer of the driving transistor Tc (P-type transistor) accordingly affects the current between the source and the drain of the driving transistor Tc, thereby affecting the magnitude of the current flowing through the light emitting structure 10, and the magnitude of the current flowing through the light emitting structure 10 directly affects the luminance of the light emitting structure 10, so that the coupling between the first signal Line1 and the first signal region causes crosstalk to the light emitting structure 10.
Based on this, the shielding structure 30 having a fixed potential is disposed between the first signal region and the first signal Line1, and the shielding structure 30 having a fixed potential can shield the signal coupling between the first signal region and the first signal Line1, thereby reducing crosstalk of the signal coupling of the first signal Line1 and the first signal region to the light emitting structure 10, and improving display defects of the organic light emitting display panel.
Alternatively, as shown in fig. 11, the first signal region Q1, the shielding structure 30, and the first signal Line1 are arranged in the same layer in an insulated manner, and the shielding structure 30 is located between the first signal region Q1 and the first signal Line1 in the direction X in which the first signal region Q1 points toward the first signal Line 1. Optionally, the first signal Line1 is a scan Line, and the pixel circuit structure 20 further includes: the driving transistor Tc, and the first signal region Q1 is a region where the gate of the driving transistor Tc is located. In this embodiment, the first signal region Q1 and the first signal Line1 are located in the same layer, and the first signal region Q1 and the first signal Line1 are arranged in this order in the direction X in which the first signal region Q1 points toward the first signal Line1, signal coupling is easily generated between the first signal region Q1 and the first signal Line 1. Based on this, in the direction X in which the first signal region Q1 points toward the first signal Line1, the shield structure 30 having a fixed potential is disposed between the first signal region Q1 and the first signal Line 1. The shielding structure 30 having a fixed potential can shield the signal coupling between the first signal region Q1 and the first signal Line1, thereby reducing crosstalk of the signal coupling of the first signal Line1 and the first signal region Q1 to the light emitting structure 10, thereby improving display defects of the organic light emitting display panel.
On the basis of any of the above embodiments, the optional shielding structure 30 shown with reference to fig. 2 is electrically connected to the reference voltage terminal VREF of the pixel circuit structure 20. The pixel circuit structure 20 has a reference voltage terminal VREF having a fixed potential, and the shielding structure 30 is disposed in the pixel circuit structure 20, so that the reference voltage terminal VREF of the pixel circuit structure 20 is electrically connected to the shielding structure 30 to provide the shielding structure 30 with the fixed potential, which facilitates wiring, does not increase wiring complexity, and does not occupy a wiring space. It will be understood by those skilled in the art that the organic light emitting display panel or the pixel circuit structure thereof further includes other voltage terminals having fixed potentials, and any one of the voltage terminals having fixed potentials in the organic light emitting display panel or the pixel circuit structure thereof may be electrically connected to the shielding structure to provide a fixed potential to the shielding structure, which is not limited in the present invention.
On the basis of any of the above embodiments, as shown in fig. 2 and 12 in combination, the optional pixel circuit structure 20 further includes a reference voltage Line2, the shielding structure 30 is disposed in the same layer as the reference voltage Line2, and both the shielding structure 30 and the reference voltage Line2 are electrically connected to a reference voltage having a fixed potential. As shown in fig. 2, the pixel circuit structure 20 has a reference voltage Line2, the reference voltage Line2 is connected to the first transistor T1 of the pixel circuit structure 20 to provide the pixel circuit structure 20 with a reference voltage signal, and in an actual structure, the reference voltage Line2 is connected to a reference voltage of the organic light emitting display panel. Based on the reference voltage Line2 and the shielding structure 30 both electrically connected to the reference voltage of the organic light emitting display panel, the optional shielding structure 30 is disposed at the same layer as the reference voltage Line2, and the optional shielding structure 30 is the same material as the reference voltage Line 2. Specifically, the process of forming the shielding structure 30 and the reference voltage Line2 is as follows: the reference voltage Line film layer is formed and etched by an etching process to simultaneously form the reference voltage Line2 electrically connected to the reference voltage and the shielding structure 30, thereby constituting the shielding structure 30 without increasing the manufacturing process and the manufacturing cost, and reducing the crosstalk influence of the coupling of the first signal Line1 and the first signal region Q1 on the light emitting structure 10.
It should be noted that the reference voltage Line2 of each pixel circuit structure 20 needs to be connected to the reference voltage of the organic light emitting display panel, and therefore a reference voltage input path for transmitting a reference voltage signal is disposed on the substrate of the organic light emitting display panel. Specifically, the driving circuit of the organic light emitting display panel applies a reference voltage signal to an input terminal of a reference voltage input path to which the reference voltage Line2 of each pixel circuit structure 20 is connected to receive the reference voltage signal transmitted by the reference voltage input path.
Alternatively, as shown in fig. 13, the shielding structure 30 is integrated with the reference voltage Line 2. In this embodiment, a part of the reference voltage Line2 may extend to serve as the shielding structure 30, and the shielding structure 30 and the reference voltage Line2 are integrated. Note that, if a local region of the reference voltage Line2 is already located between the first signal Line1 and the first signal region Q1 and can function to shield signal coupling between the first signal Line1 and the first signal region Q1, a region of the reference voltage Line2 located between the first signal Line1 and the first signal region Q1 is multiplexed as the shield structure 30.
Alternatively, referring to the pixel circuit structure 20 shown in fig. 2, which further includes the first SCAN signal Line SCAN1 that controls the reset signal, the reference voltage Line2 is closer to the first signal region Q1 than the first SCAN signal Line SCAN 1. One first SCAN signal line SCAN1 is disposed in one-to-one correspondence with and electrically connected to a row of pixel circuit structures 20, and specifically, the first SCAN signal line SCAN1 is electrically connected to the gate of the first transistor T1 of the corresponding row of pixel circuit structures 20, and the source of the first transistor T1 is electrically connected to the reference voltage terminal VREF. The first SCAN signal line SCAN1 is used to control the first transistor T1 of the corresponding row of pixel circuit structure 20 to be turned on or off, and control the reference voltage terminal VREF to reset the pixel circuit structure 20 when the first transistor T1 is turned on.
It should be noted that the first SCAN signal line SCAN1 is electrically connected to not only the gate of the first transistor T1 of the pixel circuit structure 20 in a corresponding row for controlling the pixel circuit structure 20 in the corresponding row to perform reset, but also the first SCAN signal line SCAN1 is electrically connected to the second transistor T2 of each pixel circuit structure 20 in the previous row for controlling whether the second transistor T2 of the pixel circuit structure 20 in the previous row is turned on or not, that is, the first SCAN signal line SCAN1 is multiplexed into the second SCAN signal line SCAN2 electrically connected to the pixel circuit structure 20 in the previous row. When the second SCAN signal line SCAN controls the second transistor T2 in the pixel circuit structure 20 to be turned on, the data voltage signal Vdata of the data signal line is written into the pixel circuit structure 20.
Optionally, the shielding structure 30 is electrically connected to the power supply voltage terminal PVDD of the pixel circuit structure 20. Referring to fig. 2, the pixel circuit structure 20 has a power supply voltage terminal PVDD having a fixed potential, and the shielding structure 30 is disposed in the pixel circuit structure 20, so that the power supply voltage terminal PVDD of the pixel circuit structure 20 is electrically connected to the shielding structure 30 to provide the shielding structure 30 with the fixed potential, which facilitates wiring, does not increase wiring complexity, and does not occupy a wiring space. It will be understood by those skilled in the art that the organic light emitting display panel or the pixel circuit structure thereof further includes other voltage terminals having fixed potentials, and any one of the voltage terminals having fixed potentials in the organic light emitting display panel or the pixel circuit structure thereof may be electrically connected to the shielding structure to provide a fixed potential to the shielding structure, for example, the shielding structure may also be electrically connected to a ground voltage terminal PVEE in the pixel circuit structure, which is not limited in the present invention.
Optionally, the pixel circuit structure 20 shown in fig. 2 and fig. 14 further includes a power supply voltage Line3, the shielding structure 30 is disposed in the same layer as the power supply voltage Line3, and both the shielding structure 30 and the power supply voltage Line3 are electrically connected to a power supply voltage having a fixed potential. As shown in fig. 2, the pixel circuit structure 20 has a power voltage Line3, the power voltage Line3 is connected to the third transistor T3 of the pixel circuit structure 20 to provide a power voltage signal to the pixel circuit structure 20, and in an actual structure, the power voltage Line3 is connected to a power voltage of the organic light emitting display panel. Based on the fact that the power voltage Line3 and the shielding structure 30 are both electrically connected with the power voltage of the organic light emitting display panel, the optional shielding structure 30 is disposed on the same layer as the power voltage Line3, and the optional shielding structure 30 is made of the same material as the power voltage Line 3. Specifically, the process of forming the shielding structure 30 and the power voltage Line3 is as follows: a power voltage Line film layer is formed and etched by an etching process to simultaneously form the power voltage Line3 electrically connected to the power voltage and the shielding structure 30, thereby forming the shielding structure 30 without increasing the manufacturing process and the manufacturing cost, and reducing the crosstalk influence of the coupling of the first signal Line1 and the first signal region Q1 on the light emitting structure 10.
It should be noted that the power voltage Line3 of each pixel circuit structure 20 needs to be connected to the power voltage of the organic light emitting display panel, and therefore a power voltage input path for transmitting a power voltage signal is disposed on the substrate of the organic light emitting display panel. Specifically, the driving circuit of the organic light emitting display panel applies a power supply voltage signal to an input terminal of a power supply voltage input path to which the power supply voltage Line3 of each pixel circuit structure 20 is connected to receive the power supply voltage signal transmitted by the power supply voltage input path.
Those skilled in the art will understand that the relative positional relationship of the film layers of the shielding structure 30, the first signal region Q1 and the first signal Line1 shown in fig. 3 to 14 is only a simple example, and it is convenient to clearly understand the arrangement position and arrangement manner of the shielding structure 30. The actual organic light emitting display panel also includes other structures and film layers, which are not illustrated and described one by one. Those skilled in the art will also understand that the design of the shielding structure in the present invention includes, but is not limited to, the above examples, and the shape, placement position and multiplexing manner of the shielding structure may be various types based on shielding crosstalk, and are not illustrated and described one by one here.
The embodiment of the invention also provides electronic equipment which comprises the organic light-emitting display panel. The electronic equipment can be selected to be any one of electronic display equipment such as a smart phone and a tablet personal computer which can integrate an organic light-emitting display panel. The shielding structure with the fixed potential is arranged in the organic light-emitting display panel of the electronic equipment, the shielding structure with the fixed potential can shield signal coupling between the first signal area of the first signal line and the first signal area of the pixel circuit structure, further influence of potential jump of pulse signals of the first signal line on the pixel circuit structure is reduced, then influence of crosstalk on the light-emitting structure is reduced, accordingly, the display effect of the organic light-emitting display panel is improved, and bad display phenomena are improved.
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 (13)
1. An organic light emitting display panel, comprising:
the liquid crystal display device comprises a light emitting structure, a pixel circuit structure electrically connected with the light emitting structure, and a first signal line for providing a pulse signal to the pixel circuit structure;
the pixel circuit structure comprises a driving transistor and a first signal area electrically connected with the driving transistor;
the pixel circuit structure further includes a shielding structure between the first signal region and the first signal line, wherein the shielding structure has a fixed potential;
the first signal area, the shielding structure and the first signal wire are sequentially stacked and insulated;
the shielding structure covers at least a part of the first signal region; and the shielding structure covers at least a part of the first signal line.
2. The organic light-emitting display panel according to claim 1, wherein the first signal region overlaps the first signal line in a direction perpendicular to the organic light-emitting display panel, and the shielding structure covers the first signal region and an overlapping region of the first signal line.
3. The organic light-emitting display panel according to claim 1, wherein the first signal region does not overlap with the first signal line in a direction perpendicular to the organic light-emitting display panel.
4. The organic light-emitting display panel according to any one of claims 1 to 3, wherein the first signal line supplies a data voltage signal to the pixel circuit structure;
the first signal region is electrically connected with a grid electrode of the driving transistor; and/or the presence of a gas in the gas,
the first signal region is electrically connected to the polysilicon layer of the driving transistor.
5. The organic light-emitting display panel according to any one of claims 1 to 3, wherein the first signal line supplies a gate voltage signal to the pixel circuit structure;
the first signal region is electrically connected with a grid electrode of the driving transistor; and/or the presence of a gas in the gas,
the first signal region is electrically connected to the polysilicon layer of the driving transistor.
6. The organic light-emitting display panel according to claim 1, wherein the first signal line is a scan line, and the pixel circuit structure further comprises: and the first signal area is an area where a grid electrode of the driving transistor is located.
7. The organic light emitting display panel of claim 1, wherein the shielding structure is electrically connected to a reference voltage terminal of the pixel circuit structure.
8. The organic light-emitting display panel according to claim 1, wherein the pixel circuit structure further comprises a reference voltage line, the shielding structure is disposed at the same layer as the reference voltage line, and the shielding structure and the reference voltage line are both electrically connected to a reference voltage having a fixed potential.
9. The organic light-emitting display panel according to claim 8, wherein the shielding structure is integrated with the reference voltage line.
10. The organic light-emitting display panel according to claim 8 or 9, wherein the pixel circuit structure further comprises a first scan signal line that controls a reset signal, and the reference voltage line is closer to the first signal region than the first scan signal line.
11. The organic light-emitting display panel of claim 1, wherein the shielding structure is electrically connected to a supply voltage terminal of the pixel circuit structure.
12. The organic light-emitting display panel according to claim 11, wherein the pixel circuit structure further comprises a power supply voltage line, wherein the shielding structure is disposed on the same layer as the power supply voltage line, and wherein the shielding structure and the power supply voltage line are both electrically connected to a power supply voltage having a fixed potential.
13. An electronic device characterized by comprising the organic light-emitting display panel according to any one of claims 1 to 12.
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| CN108878494B (en) * | 2018-06-29 | 2020-12-04 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and display device |
| KR102626707B1 (en) * | 2018-12-27 | 2024-01-17 | 엘지디스플레이 주식회사 | Display device |
| CN110047383B (en) * | 2019-04-29 | 2021-06-22 | 昆山国显光电有限公司 | Display panel and display device |
| CN111834375B (en) | 2019-05-23 | 2022-11-08 | 昆山国显光电有限公司 | Display substrate, display panel and display device |
| US11469291B2 (en) | 2019-11-29 | 2022-10-11 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel, method of manufacturing the same, and display device |
| CN111081141B (en) * | 2020-01-08 | 2022-04-26 | 昆山国显光电有限公司 | Array substrate, display panel and display device |
| CN114038392A (en) * | 2021-07-13 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Drive circuit, pixel circuit, display device and brightness adjusting method |
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