CN112037715B - Display panel, display device and electronic equipment - Google Patents
Display panel, display device and electronic equipment Download PDFInfo
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- CN112037715B CN112037715B CN202010961496.4A CN202010961496A CN112037715B CN 112037715 B CN112037715 B CN 112037715B CN 202010961496 A CN202010961496 A CN 202010961496A CN 112037715 B CN112037715 B CN 112037715B
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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]
- G09G3/3225—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] using an active matrix
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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
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
Abstract
The application discloses a display panel, a display device and an electronic device. A display panel comprises a TFT substrate, a pixel defining layer, an electroluminescent device layer and an encapsulating layer which are sequentially stacked, wherein the electroluminescent device layer comprises a plurality of sub-display areas which are periodically arranged, and each sub-display area at least comprises one of a red sub-pixel, a green sub-pixel and a blue sub-pixel; the first, second and third initialization voltage lines are further included; the first initialization voltage line is electrically connected with the grid electrode of the driving TFT on the TFT substrate and used for providing a first initialization voltage for the grid electrode of the driving TFT; the second initialization voltage line is electrically connected with the anode of the red sub-pixel or the blue sub-pixel and is used for providing a second initialization voltage for the anode of the red sub-pixel or the blue sub-pixel; the third initialization voltage line is electrically connected with the anode of the green sub-pixel and used for providing a third initialization voltage for the anode of the green sub-pixel; the second initialization voltage is greater than the third initialization voltage.
Description
Technical Field
The present application relates to the field of display device technology, and in particular, to a display panel, a display device, and an electronic apparatus.
Background
An Active Matrix/Organic Light Emitting Diode (AMOLED) is used in a display screen of a terminal device such as a mobile phone or a tablet computer, wherein a main Light Emitting structure includes an anode, a hole injection layer, a hole transport layer, a Light Emitting layer, an electron transport layer, and an electron injection layer; because the hole injection layer and the transmission layer can transmit electric charges, the layers are evaporated on the whole surface of a pixel light-emitting area at present, when a certain pixel emits light, the electric charges can enter an adjacent pixel through the hole injection layer and the transmission layer, and therefore the adjacent anode can leak electricity through the conducting layer. In low gray scale, the pixels are difficult to turn on when in dot monochrome picture due to mutual leakage among the pixels, so that the low gray scale picture is lost, and the phenomenon is called low gray scale damage. For the red sub-pixel, the low gray scale damage is most severe because the green and blue sub-pixels leak current to them more, followed by the green sub-pixel.
For this reason, most designers use a dual initialization power supply structure in the pixel driving circuit, and as shown in fig. 1, Vinit1 and Vinit2 are used for initialization voltages applied to the gate of the driving TFT and the anode of the OLED, respectively, to improve low gray scale damage through adjustment of Vinit 2.
However, the initialization power signal Vinit2 provides the same initialization power signal for the anodes of the rgb sub-pixels, so that the leakage current adjustment degree for each sub-pixel is the same, and only the problem of low gray level damage can be adjusted more limitedly, and the effect of low gray level and high quality display cannot be achieved.
Disclosure of Invention
The embodiment of the application provides a display panel, a display device and electronic equipment, and aims to solve the problem that high-quality display of low gray scales cannot be achieved due to the fact that low gray scale damage is caused by the fact that initialization voltages of red, green and blue sub-pixels in an existing display device are the same.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
the first aspect of the present application provides a display panel, which includes a TFT substrate, a pixel defining layer, an electroluminescent device layer, and an encapsulation layer, which are sequentially stacked, where the electroluminescent device layer includes a plurality of sub-display regions arranged periodically, and each sub-display region at least has one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel;
the first, second and third initialization voltage lines are further included;
the first initialization voltage line is electrically connected with a grid electrode of a driving TFT on the TFT substrate and used for providing a first initialization voltage for the grid electrode of the driving TFT;
the second initialization voltage line is electrically connected with the anode of the red sub-pixel or the blue sub-pixel and is used for providing a second initialization voltage for the anode of the red sub-pixel or the blue sub-pixel;
the third initialization voltage line is electrically connected with the anode of the green sub-pixel and is used for providing a third initialization voltage for the anode of the green sub-pixel;
wherein the second initialization voltage is greater than the third initialization voltage.
In some modified embodiments of the first aspect of the present application, in the display panel, both the second initialization voltage and the third initialization voltage are negative voltages.
In some modified embodiments of the first aspect of the present application, in the display panel, the second initialization voltage is 0% to 20% greater than the third initialization voltage.
In some modified embodiments of the first aspect of the present application, in the display panel, the red sub-pixel and the blue sub-pixel are located in a same column, and the green sub-pixel is located in a column adjacent to the red sub-pixel/the blue sub-pixel.
In some modified embodiments of the first aspect of the present application, in the display panel, the first initialization voltage line, the second initialization voltage line, and the third initialization voltage line are located in one row.
In some modified embodiments of the first aspect of the present application, in the display panel, the TFT substrate includes a substrate, an active layer, a first inorganic layer, a first electrode layer, a second inorganic layer, a second electrode layer, a third inorganic layer, and a source/drain electrode layer, which are sequentially stacked;
the first initialization voltage line, the second initialization voltage line, the third initialization voltage line are disposed at the same layer as the first electrode layer; or
The first initialization voltage line, the second initialization voltage line, the third initialization voltage line, and the second electrode layer are disposed at the same layer; or
Two of the first initialization voltage line, the second initialization voltage line, and the third initialization voltage line are disposed in the same layer as the second electrode layer, and the other is disposed in the same layer as the first electrode layer;
wherein the first initialization voltage line, the second initialization voltage line, the third initialization voltage line, the first electrode layer, and the second electrode layer are insulated from each other.
In some modified embodiments of the first aspect of the present application, the display panel includes a plurality of sub-pixel initializing circuits;
the second initialization voltage line is electrically connected with the anode of the red sub-pixel or the blue sub-pixel through a part of the sub-pixel initialization circuit and is used for sending the second initialization voltage to the anode of the red sub-pixel or the blue sub-pixel;
the third initialization voltage line is electrically connected to the anode of the green sub-pixel through the remaining sub-pixel initialization circuits, and is configured to transmit the third initialization voltage to the anode of the green sub-pixel.
In some modified embodiments of the first aspect of the present application, in the display panel, the sub-pixel initialization circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, and a storage capacitor;
the fifth transistor, the second transistor and the sixth transistor are sequentially connected in series, a first electrode of the fifth transistor is electrically connected with a driving voltage signal end and the storage capacitor, and a grid electrode of the fifth transistor is electrically connected with a light-emitting driving signal end;
the second electrode of the first transistor is connected to the second electrode of the fifth transistor, the grid electrode of the first transistor is connected to the scanning line of the display panel, and the first electrode of the first transistor is connected to the data signal line of the display panel;
the grid electrode of the second transistor is connected to the storage capacitor;
a first electrode and a second electrode of the third transistor are respectively connected to a second electrode of the second transistor and a first electrode of the fourth transistor, a second electrode of the fourth transistor is connected to the first initialization voltage line, and a gate of the fourth transistor is connected to a scanning line of the display panel;
the gate of the sixth transistor is electrically connected to the emission driving signal terminal, the second electrode of the sixth transistor and the first electrode of the seventh transistor are simultaneously connected to the anodes of the red/blue/green sub-pixels, the second electrode of the seventh transistor is connected to the second/third initialization voltage lines, and the gate of the seventh transistor is connected to the scan line of the display panel.
A second aspect of the present application provides a display device including the above display panel.
A third aspect of the present application provides an electronic apparatus including the display device described above.
Compared with the prior art, in the display panel provided by the first aspect of the present application, the second initialization voltage line and the third initialization voltage line are arranged to respectively transmit the initialization voltage to the red sub-pixel/blue sub-pixel and the green pixel, so that the initialization voltage of the red sub-pixel/blue sub-pixel is greater than the initialization voltage of the green pixel, and the influence of leakage current is overcome; therefore, the problem that the low gray scale display with high quality can not be achieved due to the fact that the low gray scale damage is caused by the fact that the initialization voltages of red, green and blue sub-pixels in the existing display device are the same is effectively solved; according to the display panel, the initialization voltage line is arranged on the grid layer, the transmission of the independent initialization voltage of the display panel driving TFT, the red sub-pixel/blue sub-pixel and the green sub-pixel is achieved on the premise that no additional process is added, and the problem of low gray scale is greatly solved.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically shows a sub-pixel initialization circuit diagram of a display panel in the prior art;
FIG. 2 schematically illustrates a top view of a partial structure of a display panel provided in an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view taken along A-A of the TFT substrate of FIG. 2;
FIG. 4 is a schematic top view illustrating another partial structure of a display panel according to an embodiment of the present disclosure;
FIG. 5 is a top view of the array structure of the display panel corresponding to FIG. 4;
FIG. 6 is a top view of an array structure of the display panel corresponding to FIG. 2;
fig. 7 schematically illustrates a structural diagram of a display panel provided in an embodiment of the present application;
fig. 8 schematically illustrates a schematic diagram of a sub-pixel initialization circuit in a display panel according to an embodiment of the present application;
the reference numbers illustrate: the organic light emitting diode includes a TFT substrate 1, a substrate 11, an active layer 12, a first inorganic layer 13, a first electrode layer 14, a second inorganic layer 15, a second electrode layer 16, a third inorganic layer 17, a source drain layer 18, an electroluminescent device layer 2, an encapsulation layer 3, a first initialization voltage line 4, a second initialization voltage line 5, a third initialization voltage line 6, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a storage capacitor Cst.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
example 1
Referring to fig. 7 and fig. 2, a display panel provided in this embodiment of the present application includes a TFT substrate 1, a pixel defining layer, an electroluminescent device layer 2, and an encapsulation layer 3, which are sequentially stacked, where the electroluminescent device layer 2 includes a plurality of sub-display regions arranged periodically, and each sub-display region at least includes one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel;
further includes a first initialization voltage line 4, a second initialization voltage line 5, a third initialization voltage line 6;
the first initialization voltage line 4 is electrically connected with the gate of the driving TFT on the TFT substrate 1, and is configured to provide a first initialization voltage for the gate of the driving TFT;
the second initialization voltage line 5 is electrically connected to the anode of the red sub-pixel or the blue sub-pixel, and is used for providing a second initialization voltage for the anode of the red sub-pixel or the blue sub-pixel;
the third initialization voltage line 6 is electrically connected to the anode of the green sub-pixel and is used for providing a third initialization voltage for the anode of the green sub-pixel;
wherein the second initialization voltage is greater than the third initialization voltage.
Specifically, in order to solve the problem of low gray scale damage caused by the same initialization voltage of the red, green, and blue sub-pixels in the initialization stage of the conventional display device, the display panel provided in this embodiment respectively transmits the initialization voltage to the red sub-pixel/blue sub-pixel and the green pixel through the second initialization voltage line 5 and the third initialization line 6 which are disposed on the display panel, so that the initialization voltage of the red sub-pixel/blue sub-pixel is greater than the initialization voltage of the green pixel, and the influence of leakage current is overcome.
Referring to fig. 7 and fig. 3, the TFT substrate 1 includes a substrate 11, an active layer 12, a first inorganic layer 13, a first electrode layer 14, a second inorganic layer 15, a second electrode layer 16, a third inorganic layer 17, and a source drain layer 18, which are sequentially stacked, and the above structure can be easily understood by those skilled in the art with reference to the prior art, and is used for driving and displaying sub-pixels in an OLED display panel, which is not described herein in detail.
The pixel defining layer (not shown in the figure) is used to divide the display panel into a plurality of sub-display regions, and the electroluminescent device layer 2 in fig. 6 can be understood as including the pixel defining layer, which can be easily understood by those skilled in the art with reference to the prior art and is used for driving and displaying sub-pixels in the OLED display panel, and will not be described herein; specifically, the electroluminescent device layer 2 is sequentially stacked with an anode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole access layer, and a cathode corresponding to the red-blue-green sub-pixels, and driving signals of the TFT substrate 1 and the driver IC are respectively provided to the anode and the cathode, so as to realize driving display of each sub-pixel.
The sub-pixels of the display panel are arranged in a manner that the red sub-pixels and the blue sub-pixels are arranged in the same column, and the green sub-pixels are arranged in a single column, for example: the second row and the first column are red sub-pixels, the third row and the first column are blue sub-pixels, and the second row and the second column of the third row are green sub-pixels.
The first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are metal or a combination of metal and organic matter, the first initialization voltage line 4 is electrically connected to a gate of a driving TFT on the TFT substrate 1, and is configured to provide a first initialization voltage for the gate of the driving TFT in an initialization stage, the setting is substantially the same as an initialization design of the driving TFT of the TFT substrate 1 in the prior art, and details thereof are not repeated herein; the second initialization voltage line 5 is electrically connected to the anode of the red/blue sub-pixel in the electroluminescent device layer 2, and is used for providing a second initialization voltage to the anode of the red/blue sub-pixel in the initialization stage, so that the red/blue sub-pixel can be normally driven when the next scanning light emission is performed; the third initialization voltage line 6 is electrically connected to the anode of the green sub-pixel in the electroluminescent device layer 2, and is used to provide the green sub-pixel with the third initialization voltage in the initialization phase, so that the green sub-pixel can be normally driven when the next scanning light emission is performed.
In the embodiment of the present application, the second initialization voltage is set to be greater than the third initialization voltage, so that the voltages compensated by the red pixel and the blue pixel in the initialization stage are more, and the voltage compensated by the green pixel in the initialization stage is less than that of the red pixel, thereby canceling the leakage influence of the red pixel and the green pixel, and ensuring the low gray scale display effect.
According to the above list, in the display panel provided by the first aspect of the present application, by setting the second initialization voltage line 5 and the third initialization voltage line 6, the transmission of the initialization voltage is performed on the red/blue sub-pixel and the green pixel, respectively, so that the initialization voltage of the red/blue sub-pixel is greater than the initialization voltage of the green pixel, so as to overcome the influence of leakage; therefore, the problem that the low gray scale display with high quality can not be achieved due to the fact that the low gray scale damage is caused by the fact that the initialization voltages of red, green and blue sub-pixels in the existing display device are the same is effectively solved; according to the display panel, the initialization voltage line is arranged on the grid layer, the transmission of the independent initialization voltage of the display panel driving TFT, the red sub-pixel/blue sub-pixel and the green sub-pixel is achieved on the premise that no additional process is added, and the problem of low gray scale is greatly solved.
The term "and/or" herein is merely an associative relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, specifically understood as: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
Further, in a specific implementation of the display panel provided in the embodiment of the present application, both the second initialization voltage and the third initialization voltage are negative voltages.
Specifically, in order to realize the driving display of each sub-pixel by the TFT substrate 1, referring to fig. 8, when it corresponds to a red sub-pixel/a blue sub-pixel, both the second initialization voltage and the third initialization voltage are set to negative voltages in this embodiment; when the first initialization voltage line 4 in the figure gives a first initialization voltage to the gate of the second transistor T2, i.e. the driving TFT, wherein the first initialization voltage is also a negative voltage; the second initializing voltage line 5 supplies the anode second initializing voltage to the electroluminescent device light emitting layer 2 of the red sub-pixel/blue sub-pixel through the seventh transistor T7, and then the source VDD voltage signal supplied from the driving power source to the fifth transistor T5 supplies the anode driving voltage to the electroluminescent device light emitting layer 2 of the red sub-pixel/blue sub-pixel through the fifth transistor T5, the second transistor T2 and the sixth transistor T6 to emit light; the driving circuit of the green sub-pixel is the same as the circuit shown in fig. 7, and will not be described herein; since the voltage signal of the source VDD applied to the fifth transistor T5 by the driving power source is positive voltage, when the first initialization voltage, the second initialization voltage and the third initialization voltage are all negative voltages, the transistors can be turned on smoothly to transmit the driving voltage to the anode of the electroluminescent device light-emitting layer 2 of the red/blue sub-pixel.
Further, in a specific implementation of the display panel provided in the embodiment of the present application, the second initialization voltage is 0% to 20% greater than the third initialization voltage.
Specifically, in order to offset the leakage influence of the red sub-pixel and the green sub-pixel, in this embodiment, the second initialization voltage is set to be greater than the third initialization voltage, specifically, the second initialization voltage is 0% to 20% greater than the third initialization voltage, and more specific values need to be tested and adjusted according to actual needs, and each display panel needs to test the low gray scale damage problem before leaving the factory, so as to obtain preset values of the first initialization voltage, the second initialization voltage, and the third initialization voltage, which is not limited in this embodiment; it should be noted that: the case where the second initialization voltage is 0% greater than the third initialization voltage, that is, the case where the second initialization voltage and the third initialization voltage are equal to each other is not included in the protection scope of the present application, because the second initialization voltage is used for voltage compensation of the red sub-pixel/blue sub-pixel, and the third initialization voltage is used for voltage compensation of the green sub-pixel, and if the voltage values of the second initialization voltage and the third initialization voltage are equal to each other, different leakage effects cannot be respectively cancelled.
Further, referring to fig. 3, in a specific implementation of the display panel provided in this embodiment of the present application, the TFT substrate 1 includes a substrate 11, an active layer 12, a first inorganic layer 13, a first electrode layer 14, a second inorganic layer 15, a second electrode layer 16, a third inorganic layer 17, and a source drain layer 18, which are sequentially stacked;
the first initialization voltage line 4, the second initialization voltage line 5, the third initialization voltage line 6 are disposed in the same layer as the first electrode layer 14; or
The first initialization voltage line 4, the second initialization voltage line 5, the third initialization voltage line 6 and the second electrode layer 16 are disposed in the same layer; or
Two of the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are disposed in the same layer as the second electrode layer 16, and the other is disposed in the same layer as the first electrode layer 14;
wherein the first initialization voltage line 4, the second initialization voltage line 5, the third initialization voltage line 6, the first electrode layer 14, and the second electrode layer 16 are insulated from each other.
Specifically, in order to simplify the manufacturing process and ensure the thickness of the display panel, in this embodiment, the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are disposed in the same layer and material as the first electrode layer 14 and/or the second electrode layer 16, so that the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 can be synchronously manufactured while the first electrode layer 14 and the second electrode layer 16 are disposed; wherein the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 may be simultaneously disposed on the first electrode layer 14 or simultaneously disposed on the second electrode layer 16, but since a wiring space of each layer is limited, the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 may be dispersedly arranged, for example: referring to fig. 4, 3 and 8, the first initialization voltage line 4 is disposed at the first electrode layer 14, connected to the fourth transistor T4 of the red/blue sub-pixel, and supplies the first initialization voltage to the gate of the driving TFT, i.e., the second transistor T2; the second initialization voltage line 5 and the third initialization voltage line 6 are simultaneously arranged on the second electrode layer 16, and the third initialization voltage line 6 is connected to the seventh transistor T7 of the green sub-pixel to provide the third initialization voltage for the anode of the green sub-pixel; the second initialization voltage line 5 is connected to the seventh transistor T7 of the red/blue sub-pixel to provide the second initialization voltage for the anode of the red/blue sub-pixel; referring also to fig. 2 and 8, the first initialization voltage line 4 and the third initialization voltage line are disposed in the second electrode layer 16, and the first initialization voltage line 4 is connected to the gate of the driving TFT, i.e., the second transistor T2, to supply the first initialization voltage; the third initialization voltage line 6 is connected to the seventh transistor T7 of the green sub-pixel to provide the third initialization voltage for the anode of the green sub-pixel; a second initialization voltage line 5 is arranged on the first electrode layer 14, the second initialization voltage line 5 is connected to the seventh transistor T7 of the red/blue sub-pixel, and the second initialization voltage is provided for the anode of the red/blue sub-pixel; preferably, since the second electrode layer 16 is a gate trace and signal transmission is stable, it is preferable that the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are simultaneously disposed on the second electrode layer 16.
Further, referring to fig. 2, 4, 5, and 6, in a specific implementation of the display panel provided in the embodiment of the present application, the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are located in one row respectively.
Specifically, in order to match the gate trace and the GOA driving direction of the display panel, in this embodiment, the first initialization voltage line 4, the second initialization voltage line 5, and the third initialization voltage line 6 are arranged in the same horizontal direction as the GOA driving direction, and are respectively located in a row, and the transmitted first initialization voltage, second initialization voltage, and third initialization voltage do not affect each other.
Further, referring to fig. 8, in an implementation, a display panel provided in an embodiment of the present application includes a plurality of sub-pixel initialization circuits;
the second initializing voltage line 5 is electrically connected to the anode of the red or blue sub-pixel through a part of the sub-pixel initializing circuit, for sending the second initializing voltage to the anode of the red or blue sub-pixel;
the third initializing voltage line 6 is electrically connected to the anode of the green sub-pixel through the remaining sub-pixel initializing circuits, and is configured to transmit the third initializing voltage to the anode of the green sub-pixel.
Specifically, the driving and lighting of a plurality of sub-pixels are realized, in this embodiment, a plurality of sub-pixel initialization circuits are arranged in parallel, and the plurality of sub-pixel initialization circuits correspond to the plurality of sub-pixels one by one; the part of the sub-pixel initialization circuit corresponds to the red sub-pixel/the blue sub-pixel and is connected with the second initialization voltage line to receive a second initialization voltage; the sub-pixel initializing circuit corresponding thereto corresponds to the green sub-pixel, is connected to the third initializing voltage line to receive the third initializing voltage, and each is connected to the first initializing voltage line to receive the first initializing voltage of the driving TFT, i.e., the second transistor T2, thereby realizing individual initializing voltage compensation for the red/blue and green sub-pixels.
Further, referring to fig. 8, in a specific implementation of the display panel provided in the embodiment of the present application, the sub-pixel initialization circuit includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a storage capacitor Cst;
the fifth transistor T5, the second transistor T2 and the sixth transistor T6 are sequentially connected in series, a first electrode of the fifth transistor T5 is electrically connected to a driving voltage signal terminal and the storage capacitor Cst, and a gate electrode of the fifth transistor T5 is electrically connected to a light emission driving signal terminal EM;
a second electrode of the first transistor T1 is connected to a second electrode of the fifth transistor T5, a Gate electrode of the first transistor T1 is connected to a scan line Gate of the display panel, and a first electrode of the first transistor T1 is connected to a Data signal line Data of the display panel;
the gate of the second transistor T2 is connected to the storage capacitor Cst;
a first electrode and a second electrode of the third transistor T3 are respectively connected to the second electrode of the second transistor T2 and the first electrode of the fourth transistor T4, a second electrode of the fourth transistor T4 is connected to the first initialization voltage line 4, and a gate electrode of the fourth transistor T4 is connected to a scan line Reset of the display panel;
a Gate of the sixth transistor T6 is electrically connected to the emission driving signal terminal EM, a second electrode of the sixth transistor T6 is connected to the anode of the red/blue/green sub-pixel simultaneously with the first electrode of the seventh transistor T7, a second electrode of the seventh transistor T7 is connected to the second/third initializing voltage lines 5/6, and a Gate of the seventh transistor T7 is connected to the scan line Gate of the display panel;
the first electrode and the second electrode represent the source and the drain of each component in the working state of the embodiment, and may be changed according to the actual situation and the difference of the working state.
Specifically, in order to realize the driving display of the TFT substrate 1 for each sub-pixel, referring to fig. 8, when it corresponds to red sub-pixel/blue sub-pixel, when the first initializing voltage line 4 in the figure gives the first initializing voltage to the gate of the second transistor T2, i.e., the driving TFT, and the second initializing voltage line 5 gives the second initializing voltage to the anode of the electroluminescent device luminescent layer 2 of the red sub-pixel/blue sub-pixel through the seventh transistor T7, then the source VDD voltage signal of the driving power supply to the fifth transistor T5 gives the anode driving voltage to the electroluminescent device luminescent layer 2 of the red sub-pixel/blue sub-pixel through the fifth transistor T5, the second transistor T2 and the sixth transistor T6, causing it to emit light; the driving circuit of the green sub-pixel is the same as the circuit shown in fig. 8, and the second initialization voltage line 5 is replaced by the third initialization voltage line 6, which is not described herein again; since the voltage signal of the source VDD applied to the fifth transistor T5 by the driving voltage signal terminal is positive voltage, when the first initialization voltage, the second initialization voltage, and the third initialization voltage are all negative voltages, the transistors can be turned on smoothly to transmit the driving voltage to the anode of the electroluminescent device light-emitting layer 2 of the red/blue sub-pixel.
Example 2
Further, an embodiment of the present application provides a display device, which includes the display panel.
For the specific structure and the principle of solving the low gray scale damage of the display panel described in embodiment 1, reference is made to the detailed description of embodiment 1, and redundant description is not repeated here.
Example 3
Further, an embodiment of the present application provides an electronic device, which includes the display device.
For the specific structure and the principle of solving the low gray scale damage of the display device described in embodiment 2, please refer to the detailed description of embodiment 1 and embodiment 2, which will not be described herein.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A display panel comprises a TFT substrate, a pixel defining layer, an electroluminescent device layer and an encapsulating layer which are sequentially stacked, wherein the electroluminescent device layer comprises a plurality of sub-display areas which are periodically arranged, and each sub-display area at least comprises one of a red sub-pixel, a green sub-pixel and a blue sub-pixel; the method is characterized in that:
the first, second and third initialization voltage lines are further included;
the first initialization voltage line is electrically connected with a grid electrode of a driving TFT on the TFT substrate and used for providing a first initialization voltage for the grid electrode of the driving TFT;
the second initialization voltage line is electrically connected with the anode of the red sub-pixel or the blue sub-pixel and is used for providing a second initialization voltage for the anode of the red sub-pixel or the blue sub-pixel;
the third initialization voltage line is electrically connected with the anode of the green sub-pixel and is used for providing a third initialization voltage for the anode of the green sub-pixel;
wherein the second initialization voltage is greater than the third initialization voltage;
the second initialization voltage and the third initialization voltage are both negative voltages.
2. The display panel according to claim 1, characterized in that:
the second initialization voltage is 0% -20% greater than the third initialization voltage.
3. The display panel according to claim 1, characterized in that:
the red sub-pixel and the blue sub-pixel are positioned in the same column, and the green sub-pixel is positioned in a column adjacent to the red sub-pixel/the blue sub-pixel.
4. The display panel according to claim 3, wherein:
the first initialization voltage line, the second initialization voltage line, and the third initialization voltage line are each positioned in one row.
5. The display panel according to claim 1, characterized in that:
the TFT substrate comprises a substrate, an active layer, a first inorganic layer, a first electrode layer, a second inorganic layer, a second electrode layer, a third inorganic layer and a source drain electrode layer which are sequentially stacked;
the first initialization voltage line, the second initialization voltage line, the third initialization voltage line are disposed at the same layer as the first electrode layer; or
The first initialization voltage line, the second initialization voltage line, the third initialization voltage line, and the second electrode layer are disposed at the same layer; or
Two of the first initialization voltage line, the second initialization voltage line, and the third initialization voltage line are disposed in the same layer as the second electrode layer, and the other is disposed in the same layer as the first electrode layer;
wherein the first initialization voltage line, the second initialization voltage line, the third initialization voltage line, the first electrode layer, and the second electrode layer are insulated from each other.
6. The display panel according to claim 1, characterized in that:
comprises a plurality of sub-pixel initialization circuits;
the second initialization voltage line is electrically connected with the anode of the red sub-pixel or the blue sub-pixel through a part of the sub-pixel initialization circuit and is used for sending the second initialization voltage to the anode of the red sub-pixel or the blue sub-pixel;
the third initialization voltage line is electrically connected to the anode of the green sub-pixel through the remaining sub-pixel initialization circuits, and is configured to transmit the third initialization voltage to the anode of the green sub-pixel.
7. The display panel according to claim 6, wherein:
the sub-pixel initialization circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor and a storage capacitor;
the fifth transistor, the second transistor and the sixth transistor are sequentially connected in series, a first electrode of the fifth transistor is electrically connected with a driving voltage signal end and the storage capacitor, and a grid electrode of the fifth transistor is electrically connected with a light-emitting driving signal end;
the second electrode of the first transistor is connected to the second electrode of the fifth transistor, the grid electrode of the first transistor is connected to the scanning line of the display panel, and the first electrode of the first transistor is electrically connected to the data signal line of the display panel;
the grid electrode of the second transistor is connected to the storage capacitor;
a first electrode and a second electrode of the third transistor are respectively connected with a second electrode of the second transistor and a first electrode of the fourth transistor, a second electrode of the fourth transistor is connected with the first initialization voltage line, and a grid electrode of the fourth transistor is connected with a scanning line of the display panel;
the gate of the sixth transistor is electrically connected to the emission driving signal terminal, the second electrode of the sixth transistor and the first electrode of the seventh transistor are simultaneously connected to the anodes of the red/blue/green sub-pixels, the second electrode of the seventh transistor is connected to the second/third initialization voltage lines, and the gate of the seventh transistor is connected to the scan line of the display panel.
8. A display device, characterized in that it comprises:
the display panel of any one of claims 1-7.
9. An electronic device, comprising:
the display device of claim 8.
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| KR102527793B1 (en) | 2017-10-16 | 2023-05-04 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| KR102523646B1 (en) | 2017-11-01 | 2023-04-21 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| CN111445853B (en) | 2020-05-08 | 2021-05-25 | 京东方科技集团股份有限公司 | Pixel driving circuit, display panel, driving method and display device |
| CN113035925B (en) * | 2021-03-09 | 2023-10-24 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN113299242A (en) * | 2021-05-24 | 2021-08-24 | 京东方科技集团股份有限公司 | Pixel circuit, driving method and display device |
| CN114927094A (en) * | 2022-04-14 | 2022-08-19 | 武汉华星光电半导体显示技术有限公司 | OLED display panel |
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| KR102461395B1 (en) * | 2017-12-18 | 2022-10-31 | 엘지디스플레이 주식회사 | Method for driving Organic light emitting diode display device |
| KR20200068120A (en) * | 2018-12-04 | 2020-06-15 | 삼성디스플레이 주식회사 | Method of driving a display panel for an organic light emitting display device |
| CN111490068B (en) * | 2019-01-29 | 2022-07-26 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN110034132B (en) * | 2019-06-12 | 2019-10-29 | 成都京东方光电科技有限公司 | A kind of array substrate, display panel and display device |
| CN110136651B (en) * | 2019-06-12 | 2021-09-17 | 京东方科技集团股份有限公司 | Array substrate, OLED display panel and display device |
| CN110189706B (en) * | 2019-06-28 | 2021-06-29 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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