CN113393806B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
- Publication number
- CN113393806B CN113393806B CN202110742837.3A CN202110742837A CN113393806B CN 113393806 B CN113393806 B CN 113393806B CN 202110742837 A CN202110742837 A CN 202110742837A CN 113393806 B CN113393806 B CN 113393806B
- Authority
- CN
- China
- Prior art keywords
- electrode
- transistor
- node
- storage capacitor
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000002073 nanorod Substances 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses display panel and display device, light emitting component connects the initialization node through selecting the conduction component among the display panel, select the conduction component to make light emitting component and initialization node switch on at the demonstration stage, with connect pixel circuit, give out light under pixel circuit control and show, at non-demonstration stage, select the conduction component to make light emitting component and initialization node open circuit, avoid because when light emitting component's first electrode and second electrode connect conversely, give out light at non-demonstration stage. And the display panel is also provided with a first storage capacitor connected with the initialization node, when the initialization node is subjected to voltage reset through the first transistor, the first storage capacitor can store reset electric energy, and in a non-display stage after reset, the reset electric energy stored by the first storage capacitor can counteract leakage current of the transistor in the pixel circuit flowing through the initialization node, so that the light-emitting element is prevented from emitting light due to the leakage current in the non-light-emitting stage.
Description
Technical Field
The application relates to the technical field of display equipment, and more particularly relates to a display panel and a display device.
Background
With the continuous progress of science and technology, more and more display devices are widely applied to daily life and work of people, bring huge convenience to the daily life and work of people, and become an indispensable important tool for people at present.
The main component of the display device that realizes the display function is a display panel. The display panel has a plurality of sub-pixels for image display. For a display panel using a light-emitting element which can emit light actively as a sub-pixel, a pixel circuit is required to control the light-emitting element to perform light-emitting display.
In the existing display panel, if two electrodes of the light-emitting element are connected in reverse, the light-emitting element can emit light in a non-display stage, and the display effect is influenced.
Disclosure of Invention
In view of this, the present application provides a display panel and a display device, and the scheme is as follows:
a display panel, comprising:
a pixel circuit for driving the light emitting element to emit light;
the pixel circuit is electrically connected with the light-emitting element through the initialization node;
the pixel circuit comprises a first transistor, wherein a first pole of the first transistor is connected to a first signal end, a second pole of the first transistor is electrically connected with the initialization node, a control pole of the first transistor is connected with a first control signal, and the first transistor is used for responding to the first control signal and transmitting an electric signal of the first signal end to the initialization node;
the light-emitting element comprises a first electrode and a second electrode, the first electrode is connected with a first power supply voltage, the second electrode is connected with the initialization node through a selective conduction element, the selective conduction element is used for enabling the light-emitting element to be conducted with the initialization node in a display stage, and enabling the light-emitting element to be disconnected with the initialization node in a non-display stage;
the first pole plate of the first storage capacitor is connected with the initialization node, and the second pole plate is connected with a fixed potential.
The technical scheme of the application also provides a display device which comprises the display panel.
As can be seen from the above description, in the display panel and the display device provided in the technical solution of the present application, the pixel circuit includes the first transistor, the first electrode of the first transistor can be connected to the first signal terminal, the second electrode of the first transistor can be connected to the initialization node, the control electrode of the first transistor can be connected to the first control signal, and the control electrode of the first transistor can transmit the electrical signal of the first signal terminal to the initialization node based on the first control signal to reset the voltage of the initialization node. The light-emitting element is connected with the initialization node through the selective conduction element, the selective conduction element can enable the light-emitting element to be conducted with the initialization node in the display stage so as to be connected with the pixel circuit, light-emitting display is conducted under the control of the pixel circuit, the selective conduction element can enable the light-emitting element and the initialization node to be disconnected in the non-display stage, and light emission in the non-display stage is avoided when the first electrode and the second electrode of the light-emitting element are connected in the opposite direction. And the display panel is also provided with a first storage capacitor connected with the initialization node, when the initialization node is subjected to voltage reset through the first transistor, the first storage capacitor can store reset electric energy, and in a non-display stage after reset, the reset electric energy stored by the first storage capacitor can counteract leakage current of the transistor in the pixel circuit flowing through the initialization node, so that the light-emitting element is prevented from emitting light due to the leakage current in the non-light-emitting stage.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or prior arts will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic diagram of a circuit structure in a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a circuit structure in another display panel according to an embodiment of the present disclosure;
FIG. 5 is an equivalent circuit diagram of the circuit shown in FIG. 4;
fig. 6 is a schematic structural diagram of another display panel provided in the embodiment of the present application;
fig. 7 is a schematic diagram of a circuit structure in another display panel according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a pixel circuit according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram illustrating a principle of selecting a conduction device to prevent abnormal light emission when two electrodes of a light emitting device are connected in reverse in an embodiment of the present application;
fig. 10 is a schematic diagram of a circuit structure in another display panel according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. 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 application.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, fig. 1 is a schematic diagram of a circuit structure in a display panel according to an embodiment of the present disclosure, where the display panel includes:
a pixel circuit 11, the pixel circuit 11 being used for driving the light emitting element P to emit light;
the pixel circuit 11 is electrically connected to the light emitting element P through the initialization node N0;
the pixel circuit 11 includes a first transistor T1, a first pole of the first transistor T1 is connected to the first signal terminal D1, a second pole of the first transistor T1 is electrically connected to the initialization node N0, a control pole of the first transistor T1 is connected to the first control signal S1, and the first transistor T1 is configured to respond to the first control signal S1 to transmit an electrical signal of the first signal terminal D1 to the initialization node N0;
the light emitting element P includes a first electrode connected to a first power voltage E1 and a second electrode connected to the initialization node N0 through a selective turn-on element 12, the selective turn-on element 12 being configured to turn on the light emitting element P and the initialization node N0 in a display stage and turn off the light emitting element P and the initialization node N0 in a non-display stage;
and a first polar plate of the first storage capacitor C1 is connected with the initialization node N0, and a second polar plate is connected with the fixed potential V0.
In the embodiment of the present application, the control electrode of the transistor is a gate, one of the first electrode and the second electrode is a source, and the other is a drain. The light emitting elements P are LEDs, including but not limited to Mini LEDs, micro LEDs, and Nano LEDs.
For example, the Nano-rod LED technology is available, and the Nano-rod LED is used, and is self-assembled on the electrode by means of fluid diffusion and electric field attraction. And the connection between the LED and the array backboard is realized. The pixel circuit can reset the anode of the LED, the reset voltage Vreset is generally lower than PVEE, the anode voltage is lower than the cathode voltage, and the normal LED can not emit light abnormally; and for the cathode and anode assembled LED, the LED is just forward conducted, and the pixel emits light abnormally, which affects normal display.
In the embodiment of the present application, the first transistor T1 can transmit the electrical signal of the first signal terminal D1 to the initialization node N0 based on the first control signal S1, and reset the voltage of the initialization node N0. The light emitting element P is connected to the initialization node N0 through the selective conduction element 12, the selective conduction element 12 can conduct the light emitting element P and the initialization node N0 in the display stage to connect the pixel circuit 11, and the light emitting display is performed under the control of the pixel circuit 11, and the selective conduction element 12 can disconnect the light emitting element P and the initialization node N0 in the non-display stage, so that the light emission in the non-display stage is avoided when the first electrode and the second electrode of the light emitting element P are connected in reverse.
In addition, the display panel is further provided with a first storage capacitor C1 connected to the initialization node N0, when the initialization node N0 is reset by the first transistor T1, the first storage capacitor C1 can store reset power, and in a non-display stage after reset, the reset power stored in the first storage capacitor C1 can cancel a leakage current of the transistor in the pixel circuit 11 flowing through the initialization node N0, so that the light-emitting element P is prevented from emitting light due to the leakage current in the non-light-emitting stage.
In the display panel provided in the embodiment of the present application, the capacitance value of the first storage capacitor C1 is greater than or equal to the capacitance value between the first electrode and the second electrode. When the capacitance of the first storage capacitor C1 is not smaller than the capacitance between the first electrode and the second electrode of the light emitting element P, the reset power stored by the first storage capacitor C1 during the voltage reset at the initialization node N0 is sufficient to counteract the leakage current of the transistor in the pixel circuit 11 flowing through the initialization node N0, so as to prevent the light emitting element P from emitting light due to the leakage current in the non-light emitting period.
As shown in fig. 2, fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure, in which the display panel has multiple conductive layers M of different layers, one conductive layer M includes one plate of a first storage capacitor C1, and another conductive layer M includes another plate of the first storage capacitor C1. In the mode, the two electrode plates of the first storage capacitor C1 are manufactured by the two conducting layers M in the multiplexing display panel, a metal layer does not need to be added independently, the manufacturing process is simple, and the manufacturing cost is low.
As shown in fig. 1 and fig. 2, the display panel has a substrate 10, and the pixel circuit 11, the light emitting element P, the selective conduction element 12 and the first storage capacitor C1 are disposed on the same side of the substrate 10.
The pixel circuit 11 includes a second storage capacitor. The second storage capacitor and the plurality of pixel transistors are interconnected to form a pixel circuit 11. The plurality of pixel transistors includes a first transistor T1.
As shown in fig. 3, fig. 3 is a schematic structural diagram of another display panel provided in this embodiment of the application, and in combination with the above embodiments, in the embodiment shown in fig. 3, one plate of the first storage capacitor C1 and one plate of the second storage capacitor C2 are located in the same conductive layer M, and the other plate of the first storage capacitor C1 and the other plate of the second storage capacitor C2 are located in the same conductive layer M. In this way, the first storage capacitor C1 is manufactured by two conductive layers where the second storage capacitor C2 is located in the multiplexing pixel circuit 11, the polar plate of the first storage capacitor C1 is manufactured while the polar plate of the second storage capacitor C2 is formed by patterning, and only the polar plate on the same layer of the first storage capacitor C1 needs to be additionally reserved while the polar plate of the second storage capacitor C2 is formed by patterning the conductive layer M, so that additional and separate process steps are not required, and the method is compatible with the existing process method of the pixel circuit 11, and is simple in manufacturing process and low in manufacturing cost. And the first storage capacitor C1 is made by multiplexing the two conductive layers of the second storage capacitor C2, so that the capacitance value of the first storage capacitor C1 is larger than or equal to the capacitance value between the first electrode and the second electrode of the light emitting element P.
As shown in fig. 4 and 5, fig. 4 is a schematic circuit structure diagram of another display panel provided in an embodiment of the present application, fig. 5 is an equivalent circuit diagram of the circuit shown in fig. 4, and based on the manner shown in fig. 1, in the manner shown in fig. 4 and 5, the conducting element 12 is selected to be a protection transistor T0, a first electrode of the protection transistor T0 is connected to a control electrode of the protection transistor T0, the first electrode of the protection transistor T0 is connected to a second electrode, and the second electrode of the protection transistor T0 is connected to the initialization node N0. In this way, the protection transistor T0 may be equivalent to a diode, and only allows the current flowing from the initialization node N0 to the light emitting element P to pass therethrough, and blocks the current flowing from the light emitting element P to the initialization node N0. If the two electrodes of the light emitting element P are connected in reverse, the protection transistor T0 can prevent current from flowing from the first electrode to the second electrode, and prevent the light emitting element P from emitting light during the non-display period.
In the embodiment shown in fig. 5, the protection transistor is a P-type transistor (PMOS) for example, and the P-type transistor is turned on when the control electrode is at a low potential. At this time, the drain of the protection transistor T0 is connected to the initialization node N0, and the gate and the source are connected, which is equivalent to a diode having an anode connected to the initialization node N0 and a cathode connected to the second electrode. In this embodiment, the second electrode of the light-emitting element P is an anode, and the first electrode is a cathode.
As shown in fig. 6, fig. 6 is a schematic structural diagram of another display panel provided in the embodiment of the present application, and in combination with the embodiment, in the manner shown in fig. 6, the pixel circuit 11 includes a pixel transistor T; the active structure A0 of the protection transistor T0 and the active structure A of the pixel transistor T are in the same layer and are made of the same material; the first electrode S0 and the second electrode D0 of the protection transistor T0 are the same as the first electrode S and the second electrode D of the pixel transistor T in layer and material; the gate G0 of the protection transistor T0 is the same layer and material as the gate G of the pixel transistor T.
In the embodiment shown in fig. 6, the protection transistor T0 is the same as the pixel transistor T, the pixel transistor T is a P-type transistor, and the protection transistor T0 is a P-type transistor. The protection transistor T0 can be synchronously manufactured while the pixel transistor T is manufactured, when each structure of the pixel transistor T is formed, only the corresponding structure of the protection transistor T0 on the same layer needs to be additionally reserved, no additional process step needs to be additionally and independently added, the method is compatible with the existing process method of the pixel circuit 11, the manufacturing process is simple, and the manufacturing cost is low.
In another embodiment, the selective turn-on device 12 is a diode connected between the initialization node N0 and the second electrode. In this mode, one diode is directly connected between the light-emitting element P and the pixel circuit 11, and the circuit configuration is simple as compared with the protection transistor T0.
The pixel circuit 11 includes the pixel transistor T as described above. The pixel transistor T includes an active structure including: a source region, a drain region, and a channel region between the source region and the drain region; the doping types of the source region and the drain region are the same and are different from the doping type of the channel region; the diode has a first semiconductor and a second semiconductor forming a PN junction; the first semiconductor and the source region and the drain region are in the same layer and are made of the same material; the second semiconductor and the channel region are in the same layer and are made of the same material. In the mode, the PN junction of the diode can be manufactured while the active structure of the pixel transistor T is formed, extra independent addition of process steps is not needed, the method can be compatible with the existing process method of the pixel circuit, the manufacturing process is simple, and the manufacturing cost is low.
As shown in fig. 7, fig. 7 is a schematic diagram of a circuit structure in another display panel provided in the embodiment of the present application, based on the manner shown in fig. 1, in which a pixel circuit 11 includes a plurality of pixel transistors T and a second storage capacitor C2; the pixel transistor T includes a first transistor T1. The pixel circuit 11 is configured to generate a driving current based on at least the reference voltage VREF, the second power supply voltage E2, and the data voltage, and the light emitting element emits light based on the driving current; one of the first power voltage and the second power voltage is a fixed high potential, and the other is a fixed low potential; the electrical signal of the first signal terminal D1 is a reference voltage VREF, and is used to initialize the voltage reset of the node N0. The fixed potential V0 is a first power voltage E1, a second power voltage E2, or a reference voltage VREF. In this way, the fixed voltage signal in the multiplexing pixel circuit is used as the fixed potential V0 required by the second plate of the first storage capacitor C1, and thus, it is not necessary to increase the voltage signal separately, thereby reducing the number of signal lines in the display panel and facilitating the circuit layout in the display panel.
In the circuit diagrams of the above embodiments, the pixel transistors T are all P-type transistors, and the P-type transistors are turned on when the control electrode is at a low potential. If the conducting element 12 is selected as the protection transistor T0, the protection transistor T0 is also a P-type transistor at this time, so as to be conveniently manufactured in the same process as the pixel transistor T.
When the pixel transistors T are P-type transistors, the second electrode of the light emitting element P is an anode, the first electrode is a cathode, the first power voltage E1 is a fixed low voltage PVEE, and the second power voltage E2 is a fixed high voltage PVDD.
As shown in fig. 8, fig. 8 is a schematic structural diagram of a pixel circuit provided in the embodiment of the present application, and the pixel circuit 11 is shown in a 7T1C structure, that is, the pixel circuit 11 is formed by interconnecting 7 pixel transistors and 1 storage capacitor (i.e., the second storage capacitor C2). Obviously, in the embodiment of the present application, the pixel circuit 11 of the display panel is not limited to the 7T1C structure, and may also be other pixel circuit structures such as 2T1C or 6T1C, and is not limited to the implementation manner provided in the embodiment of the present application.
The pixel circuit 11 shown in fig. 8 includes:
a first transistor T1, a control electrode of the first transistor T1 inputting a first control signal S1, a first electrode inputting a reference voltage VREF through the first signal terminal D1, and a second electrode connected to an initialization node N0;
a second transistor T2, a control electrode of the second transistor T2 inputting a second control signal S2, a first electrode inputting a DATA signal DATA, a second electrode connecting to the first node N1;
a third transistor T3, a control electrode of which is inputted with the emission signal EM, a first electrode of which is connected with the first node N1, and a second electrode of which is inputted with the second power voltage E2;
a fourth transistor T4, a control electrode of the fourth transistor T4 being connected to the second node N2, a first electrode being connected to the first node N1, and a second electrode being connected to the third node N3;
a fifth transistor T5, wherein a control electrode of the fifth transistor T5 inputs the first control signal S1, a first electrode inputs the reference voltage VREF, and a second electrode is connected to the second node N2;
one polar plate of the second storage capacitor C2 is connected with the second node N2, and the other polar plate is input with a second power voltage E2;
a sixth transistor T6, wherein a control electrode of the sixth transistor T6 inputs the second control signal S2, a first electrode is connected to the second node N2, and a second electrode is connected to the third node N3;
a seventh transistor T7, a control electrode of the seventh transistor T7 inputs the emission signal EM, a first electrode is connected to the initialization node N0, and a second electrode is connected to the third node N3. In the embodiment shown in fig. 8, all the pixel transistors T are P-type transistors, and at this time, the first power voltage is at the fixed low voltage PVEE, and the second power voltage E2 is at the PVDD.
In the above embodiment, the pixel transistors T are all P-type transistors, and when all the pixel transistors T are all P-type transistors, the first electrode of the light-emitting element is a cathode and the second electrode is an anode. The driving current Id generated in the pixel circuit 11 sequentially passes through the second electrode and the first electrode of the subpixel P from the initialization node N0, and at this time, the second electrode is an anode and the first electrode is a cathode, so that the first power voltage is required to be the fixed low potential PVEE and the second power voltage E2 is required to be the PVDD.
In another mode, the pixel transistors T may be all N-type transistors (NMOS), and the N-type transistors are turned on when the control voltage is high. If the protection transistor T0 is used as the selective conduction element 12, the protection transistor T0 is the same as the pixel transistor T, and is an N-type transistor, so that the protection transistor T and the pixel transistor T can be conveniently manufactured in the same process.
As shown in fig. 9, fig. 9 is a schematic diagram illustrating the principle of selecting a conducting device to prevent abnormal light emission when two electrodes of the light emitting device are connected in reverse in the embodiment of the present invention, when the pixel circuit 11 is a P-type transistor, the first power voltage E1 is a fixed low voltage PVEE, and a current flows from the pixel circuit 11 to the light emitting device P during normal light emission display, if the two electrodes of the light emitting device P are connected in reverse as shown in fig. 9, as shown by a dotted arrow in the figure, a current flowing from the light emitting device P to the pixel circuit 11 is formed in a non-display stage, and the current in the direction is blocked by the selecting conducting device 12, so as to prevent abnormal light emission when the two electrodes of the light emitting device P are connected in reverse.
In the above embodiment, the pixel transistors T are all P-type transistors, but in other embodiments, the pixel transistors P may be all N-type transistors. When the pixel transistors T are all N-type transistors, the first electrode of the light emitting element P is an anode, and the second electrode is a cathode. At this time, the circuit diagram in the display panel may be as shown in fig. 10.
As shown in fig. 10, fig. 10 is a schematic circuit structure diagram of another display panel provided in the embodiment of the present application, in which all the pixel transistors T in the pixel circuit 11 are N-type transistors. When the pixel transistors T are all N-type transistors, the second electrode of the light emitting element P is a cathode, the first electrode is an anode, and the first power voltage E1 is a fixed high voltage PVDD, and the second power voltage E2 is a fixed low voltage PVEE.
Based on the foregoing embodiment, another embodiment of the present application further provides a display device, where the display device is shown in fig. 11, fig. 11 is a schematic structural diagram of the display device provided in the embodiment of the present application, the display device includes a display panel 21, and the display panel 21 may be the display panel provided in the foregoing embodiment.
In the embodiment of the application, the display device can be a mobile phone, a tablet computer, a notebook computer or a wearable device with a display function, and the display device adopts the display panel, so that the problem of abnormal light emission of the light-emitting element due to the fact that the two electrodes are reversely connected can be avoided in a non-display stage.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. For the display device disclosed in the embodiment, since it corresponds to the display panel disclosed in the embodiment, the description is relatively simple, and the relevant points can be referred to the description of the relevant parts of the display panel.
It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in an article or device comprising the same element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A display panel, comprising:
a pixel circuit for driving the light emitting element to emit light;
the pixel circuit is electrically connected with the light-emitting element through an initialization node;
the pixel circuit comprises a first transistor, wherein a first electrode of the first transistor is connected to a first signal terminal, a second electrode of the first transistor is electrically connected with the initialization node, a control electrode of the first transistor is connected with a first control signal, and the first transistor is used for responding to the first control signal and transmitting an electric signal of the first signal terminal to the initialization node;
the light-emitting element comprises a first electrode and a second electrode, the first electrode is connected with a first power supply voltage, the second electrode is connected with the initialization node through a selective conduction element, the selective conduction element is used for enabling the light-emitting element to be conducted with the initialization node in a display stage, and enabling the light-emitting element to be disconnected with the initialization node in a non-display stage, so that light is prevented from emitting in the non-display stage when the first electrode and the second electrode of the light-emitting element are connected in an opposite direction; the selective conduction element is a protection transistor, a first pole of the protection transistor is connected with a control pole of the protection transistor, the first pole of the protection transistor is connected with the second pole, and a second pole of the protection transistor is connected with the initialization node;
the first electrode plate of the first storage capacitor is connected with the initialization node, the second electrode plate is connected with a fixed potential, the capacitance value of the first storage capacitor is larger than or equal to the capacitance value between the first electrode and the second electrode, when the initialization node is subjected to voltage reset through the first transistor, the first storage capacitor can store reset electric energy, and in a non-display stage after reset, the reset electric energy stored by the first storage capacitor can counteract leakage current of a transistor in the pixel circuit flowing through the initialization node.
2. The display panel according to claim 1, wherein the display panel has a plurality of conductive layers of different layers, one of the conductive layers comprises one plate of the first storage capacitor, and the other conductive layer comprises the other plate of the first storage capacitor.
3. The display panel according to claim 2, wherein the pixel circuit includes a second storage capacitor;
one polar plate of the first storage capacitor and one polar plate of the second storage capacitor are positioned on the same conductive layer, and the other polar plate of the first storage capacitor and the other polar plate of the second storage capacitor are positioned on the same conductive layer.
4. The display panel according to claim 1, wherein the pixel circuit includes a pixel transistor;
the active structure of the protection transistor is the same as that of the pixel transistor in layer and material; the first pole and the second pole of the protection transistor are the same as the first pole and the second pole of the pixel transistor in layer and are made of the same material; the control electrode of the protection transistor and the control electrode of the pixel transistor are in the same layer and are made of the same material.
5. The display panel according to claim 1, wherein the pixel circuit includes a plurality of pixel transistors and a second storage capacitor; the pixel transistor includes the first transistor; the pixel circuit is configured to generate a drive current based on at least a reference voltage, a second power supply voltage, and a data voltage, the light emitting element emitting light based on the drive current; one of the first power voltage and the second power voltage is a fixed high potential, and the other is a fixed low potential;
wherein the fixed potential is the first power voltage, the second power voltage or the reference voltage.
6. The display panel according to claim 5, wherein the pixel transistors are P-type transistors, the first power voltage is the fixed low potential, and the second power voltage is a fixed high potential.
7. The display panel according to claim 5, wherein the pixel transistors are N-type transistors, the first power voltage is the fixed high potential, and the second power voltage is a fixed low potential.
8. The display panel according to claim 1, wherein the pixel circuit comprises:
the first transistor;
a second transistor, a control electrode of which inputs a second control signal, a first electrode of which inputs a data signal, and a second electrode of which is connected with a first node;
a third transistor having a control electrode to which a light emitting signal is input, a first electrode connected to the first node, and a second electrode to which a second power supply voltage is input;
a fourth transistor, a control electrode of which is connected with the second node, a first electrode of which is connected with the first node, and a second electrode of which is connected with the third node;
a fifth transistor, a control electrode of which inputs the first control signal, a first electrode of which inputs a reference voltage, and a second electrode of which is connected to the second node;
one polar plate of the second storage capacitor is connected with the second node, and the other polar plate of the second storage capacitor inputs the second power supply voltage;
a sixth transistor, a control electrode of which inputs the second control signal, a first electrode of which is connected to the second node, and a second electrode of which is connected to the third node;
and a seventh transistor having a control electrode to which the light emission signal is input, a first electrode connected to the initialization node, and a second electrode connected to the third node.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742837.3A CN113393806B (en) | 2021-06-30 | 2021-06-30 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742837.3A CN113393806B (en) | 2021-06-30 | 2021-06-30 | Display panel and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113393806A CN113393806A (en) | 2021-09-14 |
| CN113393806B true CN113393806B (en) | 2023-01-03 |
Family
ID=77624879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110742837.3A Active CN113393806B (en) | 2021-06-30 | 2021-06-30 | Display panel and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113393806B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115206242B (en) * | 2022-05-10 | 2023-10-20 | 重庆惠科金渝光电科技有限公司 | Pixel circuit and display device |
| CN115083345A (en) * | 2022-06-28 | 2022-09-20 | 武汉天马微电子有限公司 | Display panels and display devices |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3733023B2 (en) * | 2000-12-27 | 2006-01-11 | シャープ株式会社 | Driving circuit for light emitting device |
| JP4409200B2 (en) * | 2003-04-16 | 2010-02-03 | 株式会社コマデン | LED drive circuit for display |
| KR100673759B1 (en) * | 2004-08-30 | 2007-01-24 | 삼성에스디아이 주식회사 | Light emitting display |
| JP2017158307A (en) * | 2016-03-02 | 2017-09-07 | 株式会社電菱 | Input protection circuit |
| CN106940979B (en) * | 2017-05-23 | 2019-01-25 | 京东方科技集团股份有限公司 | Pixel compensation circuit and its driving method, display device |
| CN108806605A (en) * | 2018-06-15 | 2018-11-13 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel and display device |
| CN209232793U (en) * | 2018-12-13 | 2019-08-09 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN109817159B (en) * | 2019-03-29 | 2021-07-20 | 昆山国显光电有限公司 | Pixel driving circuit and display device |
| CN111105749B (en) * | 2020-01-15 | 2022-10-25 | 京东方科技集团股份有限公司 | Pixel circuit, pixel driving method and display device |
| CN111210772B (en) * | 2020-03-06 | 2021-03-09 | 京东方科技集团股份有限公司 | Display driving circuit, display panel and electronic equipment |
| CN113035133A (en) * | 2021-03-26 | 2021-06-25 | 昆山国显光电有限公司 | Pixel driving circuit, driving method of pixel driving circuit and display panel |
-
2021
- 2021-06-30 CN CN202110742837.3A patent/CN113393806B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113393806A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI699063B (en) | Esd protection circuit, related display panel with protection against esd, and esd protection structure | |
| US20230260453A1 (en) | Array substrate, display panel, spliced display panel and display driving method | |
| US10580360B2 (en) | Pixel circuit and driving method thereof, display device | |
| US10269300B2 (en) | Organic light-emitting display panel, driving method thereof, and organic light-emitting display device | |
| CN108039148B (en) | A kind of display panel and electronic equipment | |
| US10256226B2 (en) | Display device including electrostatic discharge circuit | |
| CN113078174B (en) | Array substrate, display panel and display device | |
| CN100525566C (en) | Organic light emitting display and method of fabricating the same | |
| JP7025213B2 (en) | Electronic circuits and drive methods, display panels, and display devices | |
| CN110690265A (en) | Display substrate, manufacturing method thereof and display device | |
| CN113393806B (en) | Display panel and display device | |
| CN109216425B (en) | Display panel and display device | |
| CN105427806A (en) | Pixel circuit, display substrate and method for driving the display substrate, and display apparatus | |
| CN211265478U (en) | Display substrate and display device | |
| CN114758624A (en) | Pixel circuit, driving method thereof, array substrate, display panel and display device | |
| CN113785400A (en) | Display device and method of manufacturing the same | |
| CN111564138B (en) | Pixel circuit, driving method thereof, display panel and display device | |
| CN110930941A (en) | Display module and display device | |
| CN110164364A (en) | Display panel and preparation method thereof, display device | |
| CN108766353B (en) | Pixel driving circuit and method and display device | |
| KR102623093B1 (en) | Pixel driving circuit and display panel | |
| CN114743504B (en) | Pixel circuit, display panel and display device | |
| CN110930949A (en) | Pixel circuit and display panel | |
| CN109904189A (en) | Pixel unit and array substrate, display device | |
| CN114299867B (en) | Display panel, driving method thereof and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |