CN111785203B - Driving method and driving device of light emitting circuit - Google Patents
Driving method and driving device of light emitting circuit Download PDFInfo
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- CN111785203B CN111785203B CN202010660602.5A CN202010660602A CN111785203B CN 111785203 B CN111785203 B CN 111785203B CN 202010660602 A CN202010660602 A CN 202010660602A CN 111785203 B CN111785203 B CN 111785203B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses a driving method and a driving device of a light-emitting circuit, before a preset time node in a display period of a frame of image, a low level signal can be provided for a light-emitting device of the light-emitting circuit through a high level signal line of the light-emitting circuit, so that partial charges in the light-emitting device in a turn-off state can be cleared by using the low level signal, and because the voltage difference between two ends of the light-emitting device is zero, no current flows through the light-emitting device, the light-emitting device is turned off, and abnormal display of a display panel of the light-emitting device can not be caused. After the preset time node, a high level signal is provided for the light-emitting device through the high level signal line, and the light-emitting device can be in a light-emitting state due to the voltage difference between two ends of the light-emitting device, so that the normal display of the display panel is ensured, and the display quality of the display panel is improved.
Description
Technical Field
The present disclosure relates to display technologies, and in particular, to a driving method and a driving apparatus for a light emitting circuit.
Background
Referring to fig. 1 and fig. 2, fig. 1 is an equivalent schematic diagram of a conventional light emitting circuit, and fig. 2 is a driving timing diagram thereof. The inventors have found that when the light emission driving circuit of fig. 1 operates according to the driving timing of fig. 2, there are the following problems: when the scan signal (scan) line and the data signal (date) line are simultaneously supplied with a high level, the light emitting device emits light and the storage capacitor is charged. However, when the Scan signal (Scan) line and the data signal (date) line are simultaneously supplied with the low level, the gate-source voltage difference of the transistor T2 is smaller than the threshold voltage thereof, and thus the transistor T2 is turned off. Since the storage capacitor stores charges, the gate-source voltage difference of the transistor T1 is greater than the threshold voltage thereof, and therefore the transistor T1 is still in the on state, so that the light emitting device continuously emits light, and therefore, when a low-level data signal is provided by a data signal line, the technical effect that the light emitting device is expected to be turned off cannot be achieved, which causes a problem of abnormal display of the display panel, and affects the display quality of the display panel.
Disclosure of Invention
In view of the above, the present application provides a driving method and a driving apparatus for a light emitting circuit, which can solve the problem of abnormal display of a display panel and improve the display quality of the display panel.
In a first aspect, a driving method of a light emitting circuit is provided, the driving method including:
before a preset time node in a display period of one frame of image, providing a low level signal to a light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit so as to clear partial charges in the light emitting device in an off state by using the low level signal;
and after the preset time node, providing a high-level signal to the light-emitting device through the high-level signal line so as to enable the light-emitting device to be in a light-emitting state.
In one embodiment, the driving method further includes:
before the preset time node, providing a first data signal to a control electrode of a first switch circuit of the light-emitting circuit through a second switch circuit of the light-emitting circuit so as to enable the first switch circuit to be in a conducting state when the high-level signal wire provides the low-level signal to the light-emitting device;
wherein a first pole of the first switching circuit is connected to the high level signal line, a second pole of the first switching circuit is connected to the low level signal line, and the light emitting device is connected to the first pole of the first switching circuit and the high level signal line, or the light emitting device is connected to the second pole of the first switching circuit and the low level signal line;
the first pole of the second switch circuit is connected with the control pole of the first switch circuit, the second pole of the second switch circuit is connected with the data signal line, and the control pole of the second switch circuit is connected with the scanning signal line.
In one embodiment, the step of providing the first data signal to the control electrode of the first switch circuit through the second switch circuit before the preset time node comprises:
before the preset time node, providing a first scanning signal to a control electrode of the second switch circuit through a scanning signal line of the light-emitting circuit so as to enable a first electrode of the second switch circuit to be conducted with a second electrode of the second switch circuit;
providing a first data signal to a second pole of the second switch circuit to transmit the first data signal to a control pole of the first switch circuit when the second switch circuit is turned on, the first data signal for causing the first switch circuit to be in a turned-on state when the high-level signal line provides a low-level signal to the light emitting device.
In one embodiment, the driving method further includes:
and after the preset time node, providing a second data signal to a control electrode of the first switch circuit through the second switch circuit so as to enable the first switch circuit to be in a conducting state when the high-level signal is provided to the light-emitting device through the high-level signal line.
In one embodiment, the step of providing the second data signal to the control electrode of the first switching circuit through the second switching circuit after the preset time node comprises:
after the preset time node, providing a second scanning signal to a control electrode of the second switch circuit through the scanning signal line so as to enable the second switch circuit to be conducted;
providing a second data signal to a second pole of the second switch circuit to transmit the second data signal to a control pole of the first switch circuit when the second switch circuit is turned on, the data signal for causing the first switch circuit to be in a conductive state when the high-level signal line provides a high-level signal to the light emitting device.
In a second aspect, a driving apparatus of a light emitting circuit is also provided, the driving apparatus comprising:
the level signal providing module is used for providing a low level signal to a light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit before a preset time node in a display period of a frame of image so as to eliminate partial charges in the light emitting device in an off state by using the low level signal, and is used for providing a high level signal to the light emitting device through the high level signal line after the preset time node so as to enable the light emitting device to be in a light emitting state.
In one embodiment, the driving device further includes:
a control module, configured to provide a first data signal to a control electrode of a first switch circuit of the light emitting circuit through a second switch circuit of the light emitting circuit before the preset time node, so that the first switch circuit is in a conducting state when the high-level signal line provides the low-level signal to the light emitting device;
wherein a first pole of the first switching circuit is connected to the high level signal line, a second pole of the first switching circuit is connected to the low level signal line, and the light emitting device is connected to the first pole of the first switching circuit and the high level signal line, or the light emitting device is connected to the second pole of the first switching circuit and the low level signal line;
the first pole of the second switch circuit is connected with the control pole of the first switch circuit, the second pole of the second switch circuit is connected with the data signal line, and the control pole of the second switch circuit is connected with the scanning signal line.
In one embodiment, the control module is further configured to provide a first scan signal to the control electrode of the second switch circuit through the scan signal line of the light emitting circuit before the preset time node to turn on the second switch circuit, and provide a first data signal to the second electrode of the second switch circuit to transmit the first data signal to the control electrode of the first switch circuit when the second switch circuit is turned on, the first data signal being used to turn on the first switch circuit when the high-level signal line provides the low-level signal to the light emitting device.
In one embodiment, the control module is further configured to provide a second data signal to the control electrode of the first switch circuit through the second switch circuit after the preset time node, so that the first switch circuit is in a conducting state when the high-level signal is provided to the light emitting device by the high-level signal line.
In one embodiment, the control module is further configured to provide a second scan signal to the control electrode of the second switch circuit through the scan signal line after the preset time node to turn on the second switch circuit, and to provide a second data signal to the second electrode of the second switch circuit to transmit the second data signal to the control electrode of the first switch circuit when the second switch circuit is turned on, where the data signal is used to turn on the first switch circuit when the high-level signal line provides a high-level signal to the light emitting device.
When the driving method and the driving device of the light emitting circuit in the embodiment of the application are applied to the existing light emitting circuit, before a preset time node in a display period of a frame of image, a low level signal can be provided for the light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit, so that partial charges in the light emitting device in an off state can be eliminated by using the low level signal, and as the voltage difference between two ends of the light emitting device is zero, no current flows through the light emitting device, the light emitting device is off, and abnormal display of a display panel of the light emitting device cannot be caused. After the preset time node, a high level signal is provided for the light-emitting device through the high level signal line, and the light-emitting device can be in a light-emitting state due to the voltage difference between two ends of the light-emitting device, so that the normal display of the display panel is ensured, and the display quality of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an equivalent diagram of a conventional light-emitting circuit;
FIG. 2 is a waveform diagram illustrating a driving timing sequence of a conventional light-emitting circuit;
FIG. 3 is a flow chart illustrating a driving method of a light emitting circuit according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a light emitting circuit according to an embodiment of the present application;
fig. 5 is a waveform diagram illustrating a driving timing of a light emitting circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The following embodiments and their technical features may be combined with each other without conflict.
The embodiment of the application provides a driving method of a light-emitting circuit, which can solve the problem of abnormal display of a display panel and improve the display quality of the display panel.
As shown in fig. 3, the driving method includes the steps of:
s301, before a preset time node in a display period of one frame of image, providing a low level signal to a light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit, so as to clear a part of charges in the light emitting device in an off state by using the low level signal.
In the embodiment of the present application, a high-level data signal or a low-level data signal may be provided through the data signal line, a high-level scan signal or a low-level scan signal may be provided through the scan signal line, and a ground voltage may be provided through the low-level signal line.
It should be noted that, in the embodiment of the present application, the scan signal at the high level after the preset time node and the data signal at the high level are both referred to as pulse signals.
It should be noted that the preset time node in the embodiment of the present application refers to a time node at which a signal accessed by a high-level signal line changes from a low level to a high level.
In one embodiment, as shown in fig. 4, for a structural schematic diagram of the light emitting circuit, a first pole of the first switch circuit U1 is connected to the high level signal (VDD), a second pole of the first switch circuit U1 is connected to the low level signal line VSS, the light emitting device D1 is connected to the first pole of the first switch circuit U1 and the high level signal line, or the light emitting device D1 is connected to the second pole of the first switch circuit U1 and the low level signal (VSS); a first pole of the second switch circuit U2 is connected to the control pole of the first switch circuit U1, a second pole of the second switch circuit U2 is connected to the data signal (date) line, and a control pole of the second switch circuit U2 is connected to the scan signal line.
The driving method further includes:
before the preset time node, providing a first data signal to a control electrode of a first switching circuit U1 of the light emitting circuit through a second switching circuit U2 of the light emitting circuit to make the first switching circuit U1 in a conductive state when the high level signal line provides the low level signal to the light emitting device; the first data signal may be a high level signal.
Further, the step of providing the first data signal to the gate of the first switch circuit U1 through the second switch circuit U2 before the preset time node comprises:
before the preset time node, providing a first scan signal to a control electrode of the second switch circuit U2 through a scan signal line of the light emitting circuit to make the second switch circuit U2 conductive; a first data signal is provided to a second pole of the second switch circuit U2 to transmit the first data signal to a control pole of the first switch circuit U1 when the second switch circuit U2 is turned on, the first data signal being for causing the first switch circuit U1 to be in a turned-on state when the high-level signal line provides a low-level signal to the light emitting device. The first scan signal may be a high level signal.
And S302, after the preset time node, providing a high-level signal to the light-emitting device through the high-level signal line so as to enable the light-emitting device to be in a light-emitting state.
In one embodiment, the step of providing the second data signal to the gate of the first switch circuit U1 through the second switch circuit U2 after the preset time node comprises:
after the preset time node, providing a second scan signal to the control electrode of the second switch circuit U2 through the scan signal line to make the first electrode of the second switch circuit U2 and the second electrode of the second switch circuit U2 conductive;
a second data signal is provided to the second pole of the second switch circuit U2 to transmit the second data signal to the control pole of the first switch circuit U1 when the second switch circuit is turned on, the data signal being for causing the first pole of the first switch circuit U1 and the second pole of the first switch circuit U1 to be in a conductive state when the high level signal line provides a high level signal to the light emitting device. The second data signal may be a high level signal.
Further, the step of providing a second data signal to the gate of the first switch circuit U1 through the second switch circuit U2 after the preset time node comprises:
after the preset time node, providing a second scan signal to the control electrode of the second switch circuit U2 through the scan signal line to make the second switch circuit U2 conductive;
a second data signal is provided to a second pole of the second switch circuit U2 to transmit the second data signal to the control pole of the first switch circuit U1 when the second switch circuit U2 is turned on, the data signal being for causing the first switch circuit U1 to be in a conductive state when the high level signal line provides a high level signal to the light emitting device. The second scan signal may be a high level signal.
In the embodiment of the present application, as shown in fig. 5, the high-level data signal may be provided twice through the data signal line of the light emitting circuit in the display period of one frame of image, and the high-level scan signal may be provided twice through the scan signal line of the light emitting circuit, or the high-level data signal may be provided three times through the data signal line in the display period of one frame of image, and the high-level scan signal may be provided three times through the scan signal line, which is not limited herein.
It should be noted that the light emitting device D1 in the embodiment of the present application may be an LED, a Mini-LED, or an OLED, and is not limited herein. Mini-LEDs (Mini-LEDs), also known as sub-millimeter LEDs, mean LEDs with a grain size of about 100 microns, between conventional LEDs and Micro-LEDs. The Mini-LED has the characteristics of high contrast, high color rendering performance and the like which can be compared with Organic Light Emitting Diodes (OLEDs), the cost is only about six times of that of the OLED, the technical difficulty is lower compared with Micro-LEDs, OLEDs and Mini-LEDs, the mass production is easier to realize, the market of liquid crystal display backlight sources can be developed in a large quantity, the product economy is better, and therefore the Mini-LED becomes a hotspot for development and layout of various large panel manufacturers.
In the driving method of the light emitting circuit in the embodiment of the application, before a preset time node in a display period of one frame of image, a low level signal can be provided to the light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit, so that partial charges in the light emitting device in an off state can be cleared by using the low level signal, and since a voltage difference between two ends of the light emitting device is zero, no current flows through the light emitting device, the light emitting device is off, and abnormal display of a display panel of the light emitting device cannot be caused. After the preset time node, a high level signal is provided for the light-emitting device through the high level signal line, and the light-emitting device can be in a light-emitting state due to the voltage difference between two ends of the light-emitting device, so that the normal display of the display panel is ensured, and the display quality of the display panel is improved.
An embodiment of the present invention further provides a driving apparatus for a light emitting circuit, where the driving apparatus includes:
the level signal providing module is used for providing a low level signal to a light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit before a preset time node in a display period of a frame of image so as to eliminate partial charges in the light emitting device in an off state by using the low level signal, and is used for providing a high level signal to the light emitting device through the high level signal line after the preset time node so as to enable the light emitting device to be in a light emitting state.
In one embodiment, as shown in fig. 4, for a schematic structural diagram of the light emitting circuit, a first pole of the first switch circuit U1 is connected to the high level signal (VDD), a second pole of the first switch circuit U1 is connected to the low level signal line VSS, the light emitting device D1 is connected to the first pole of the first switch circuit U1 and the high level signal line, or the light emitting device D1 is connected to the second pole of the first switch circuit U1 and the low level signal (VSS); a first pole of the second switch circuit U2 is connected to the control pole of the first switch circuit U1, a second pole of the second switch circuit U2 is connected to the data signal (date) line, and a control pole of the second switch circuit U2 is connected to the scan signal line. The first data signal may be a high level signal.
The driving device further includes:
a control module for providing a first data signal to a control electrode of a first switching circuit U1 of the light emitting circuit through a second switching circuit U2 of the light emitting circuit before the preset time node to make the first switching circuit U1 in a conductive state when the high level signal line provides the low level signal to the light emitting device;
in one embodiment, the control module is further configured to provide a first scan signal to the control electrode of the second switch circuit U2 through the scan signal line of the light emitting circuit before the preset time node to turn on the second switch circuit U2, and to provide a first data signal to the second electrode of the second switch circuit U2 to transmit the first data signal to the control electrode of the first switch circuit U1 when the second switch circuit U2 is turned on, the first data signal being used to turn on the first switch circuit U1 when the high-level signal line provides the low-level signal to the light emitting device.
Further, the control module is further configured to provide a second data signal to the control electrode of the first switch circuit U1 through the second switch circuit U2 after the preset time node to enable the first switch circuit U1 to be in a conducting state when the high-level signal line provides the high-level signal to the light emitting device.
In one embodiment, the control module is further configured to provide a second scan signal to the control electrode of the second switch circuit U2 through the scan signal line after the preset time node to turn on the second switch circuit U2, and to provide a second data signal to the second electrode of the second switch circuit U2 to transmit the second data signal to the control electrode of the first switch circuit U1 when the second switch circuit U2 is turned on, the data signal being used to turn on the first switch circuit U1 when the high-level signal is provided to the light emitting device.
Specifically, as shown in fig. 4, the first switch circuit U1 is a first transistor T1, and the second switch circuit U2 is a second transistor T2; a gate of the first transistor T1 serves as a control electrode of the first switch circuit U1, a first electrode serves as a first electrode of the first switch circuit U1, and a second electrode serves as a second electrode of the second switch circuit U2; the gate of the second transistor serves as the control electrode of the second switch circuit U2, the first electrode serves as the first electrode of the second switch circuit U2, and the second electrode serves as the second electrode of the second switch circuit U2.
In one embodiment, as shown in fig. 4, a first pole of the first transistor T1 is connected to the high-level signal line through the light emitting device, wherein: a first electrode of the first transistor T1 is connected to an anode of the light emitting device, and a cathode of the light emitting device D1 is connected to the high level signal line.
In another embodiment, the second pole of the first transistor T1 is connected to the low level signal line through the light emitting device D1, wherein: the second electrode of the first transistor T1 is connected to the cathode of the light emitting device, and the anode of the light emitting device D1 is connected to the low level signal line.
It should be noted that the light emitting device D1 in the embodiment of the present application may be an LED, a Mini-LED, or an OLED, and is not limited herein. Mini-LEDs (Mini-LEDs), also known as sub-millimeter LEDs, mean LEDs with a grain size of about 100 microns, between conventional LEDs and Micro-LEDs. The Mini-LED has the characteristics of high contrast, high color rendering performance and the like which can be compared with Organic Light Emitting Diodes (OLEDs), the cost is only about six times of that of the OLED, the technical difficulty is lower compared with Micro-LEDs, OLEDs and Mini-LEDs, the mass production is easier to realize, the market of liquid crystal display backlight sources can be developed in a large quantity, the product economy is better, and therefore the Mini-LED becomes a hotspot for development and layout of various large panel manufacturers.
In addition, the first Transistor T1 may be a metal oxide semiconductor field effect Transistor (MESFET, abbreviated as MOS Transistor) or a Thin Film Transistor (TFT), and is not limited herein.
In the driving apparatus of the light emitting circuit in the embodiment of the present application, before a preset time node in a display period of a frame of image, a low level signal is provided to the light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit, so as to remove a part of charges in the light emitting device in an off state by using the low level signal, and since a voltage difference between two ends of the light emitting device is zero, no current flows through the light emitting device, the light emitting device is off, and abnormal display of the display panel of the light emitting device is not caused. After the preset time node, a high level signal is provided for the light-emitting device through the high level signal line, and the light-emitting device can be in a light-emitting state due to the voltage difference between two ends of the light-emitting device, so that the normal display of the display panel is ensured, and the display quality of the display panel is improved.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification.
That is, the above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, such as mutual combination of technical features between various embodiments, or direct or indirect application to other related technical fields, are included in the scope of the present application.
In the foregoing description, various details have been set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (8)
1. A driving method of a light emitting circuit, the driving method comprising:
before a preset time node in a display period of a frame of image, providing a low level signal to a light emitting device of the light emitting circuit through a high level signal line of the light emitting circuit so as to clear partial charges in the light emitting device in an off state by using the low level signal;
before the preset time node, providing a first data signal to a control electrode of a first switch circuit of the light-emitting circuit through a second switch circuit of the light-emitting circuit to enable the first switch circuit to be in a conducting state when the high-level signal line provides the low-level signal to the light-emitting device, and providing a first scanning signal to a control electrode of the second switch circuit through a scanning signal line of the light-emitting circuit to enable the second switch circuit to be conducted;
wherein a first pole of the first switching circuit is connected to the high level signal line, a second pole of the first switching circuit is connected to the low level signal line, and the light emitting device is connected to the first pole of the first switching circuit and the high level signal line, or the light emitting device is connected to the second pole of the first switching circuit and the low level signal line;
a first pole of the second switch circuit is connected with a control pole of the first switch circuit, a second pole of the second switch circuit is connected with the data signal line, and the control pole of the second switch circuit is connected with the scanning signal line;
after the preset time node, providing a high-level signal to the light-emitting device through the high-level signal line so as to enable the light-emitting device to be in a light-emitting state;
before the preset time point, the first scanning signal is reduced from an output high level signal to an output low level signal.
2. The method of claim 1, wherein the step of providing the first data signal to the gate of the first switch circuit through the second switch circuit before the preset time node comprises: providing a first data signal to a second pole of the second switch circuit to transmit the first data signal to a control pole of the first switch circuit when the second switch circuit is turned on, the first data signal for causing the first switch circuit to be in a turned-on state when the high-level signal line provides a low-level signal to the light emitting device.
3. The method for driving a light-emitting circuit according to claim 1, further comprising:
and after the preset time node, providing a second data signal to a control electrode of the first switch circuit through the second switch circuit so as to enable the first switch circuit to be in a conducting state when the high-level signal is provided to the light-emitting device through the high-level signal line.
4. The method according to claim 3, wherein the step of providing the second data signal to the control electrode of the first switching circuit through the second switching circuit after the preset time node comprises:
after the preset time node, providing a second scanning signal to a control electrode of the second switch circuit through the scanning signal line so as to enable the second switch circuit to be conducted;
providing a second data signal to a second pole of the second switch circuit to transmit the second data signal to a control pole of the first switch circuit when the second switch circuit is turned on, the data signal for causing the first switch circuit to be in a conductive state when the high-level signal line provides a high-level signal to the light emitting device.
5. A driving apparatus of a light emitting circuit, the driving apparatus comprising: a level signal providing module, configured to provide a low level signal to a light emitting device of a light emitting circuit through a high level signal line of the light emitting circuit before a preset time node in a display period of one frame of image, so as to remove a part of charges in the light emitting device in an off state by using the low level signal, and to provide a high level signal to the light emitting device through the high level signal line after the preset time node, so as to enable the light emitting device to be in a light emitting state; and
a control module, configured to provide a first data signal to a control electrode of a first switch circuit of the light emitting circuit through a second switch circuit of the light emitting circuit before the preset time node, so as to enable the first switch circuit to be in a conducting state when the high-level signal line provides the low-level signal to the light emitting device, and provide a first scan signal to a control electrode of the second switch circuit through a scan signal line of the light emitting circuit, so as to enable the second switch circuit to be conducting;
wherein a first pole of the first switching circuit is connected to the high level signal line, a second pole of the first switching circuit is connected to the low level signal line, and the light emitting device is connected to the first pole of the first switching circuit and the high level signal line, or the light emitting device is connected to the second pole of the first switching circuit and the low level signal line; a first pole of the second switch circuit is connected with a control pole of the first switch circuit, a second pole of the second switch circuit is connected with the data signal line, and the control pole of the second switch circuit is connected with the scanning signal line;
before the preset time point, the first scanning signal is reduced from an output high level signal to an output low level signal.
6. The apparatus of claim 5, wherein the control module is further configured to provide a first data signal to the second pole of the second switch circuit before the predetermined time node to transmit the first data signal to the control pole of the first switch circuit when the second switch circuit is turned on, and the first data signal is configured to make the first switch circuit in a conducting state when the high-level signal line provides a low-level signal to the light emitting device.
7. The apparatus of claim 5, wherein the control module is further configured to provide a second data signal to the control electrode of the first switch circuit through the second switch circuit after the predetermined time node, so as to make the first switch circuit in a conducting state when the high-level signal is provided to the light emitting device by the high-level signal line.
8. The apparatus of claim 7, wherein the control module is further configured to provide a second scan signal to the control electrode of the second switch circuit via the scan signal line after the predetermined time node to turn on the second switch circuit, and to provide a second data signal to the second electrode of the second switch circuit to transmit the second data signal to the control electrode of the first switch circuit when the second switch circuit is turned on, the data signal being configured to turn on the first switch circuit when the high-level signal line provides a high-level signal to the light emitting device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660602.5A CN111785203B (en) | 2020-07-09 | 2020-07-09 | Driving method and driving device of light emitting circuit |
| PCT/CN2020/114722 WO2022007185A1 (en) | 2020-07-09 | 2020-09-11 | Driving method and apparatus for light-emitting circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010660602.5A CN111785203B (en) | 2020-07-09 | 2020-07-09 | Driving method and driving device of light emitting circuit |
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| CN111785203B true CN111785203B (en) | 2021-09-24 |
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| TW200641781A (en) * | 2005-05-26 | 2006-12-01 | Delta Optoelectronics Inc | Driving method and circuit for active matrix organic display |
| JP2008257086A (en) * | 2007-04-09 | 2008-10-23 | Sony Corp | Display device, manufacturing method of display device, and electronic equipment |
| JP5332232B2 (en) * | 2008-02-25 | 2013-11-06 | セイコーエプソン株式会社 | Pixel circuit, digital drive type electro-optical device and electronic apparatus |
| CN102044213B (en) * | 2009-10-21 | 2013-12-18 | 京东方科技集团股份有限公司 | Current-driven pixel circuit, drive method thereof and organic light emitting display device |
| CN102930820B (en) * | 2012-10-23 | 2015-04-29 | 京东方科技集团股份有限公司 | Pixel drive circuit, display device and drive method thereof |
| CN202838917U (en) * | 2012-10-23 | 2013-03-27 | 京东方科技集团股份有限公司 | Pixel drive circuit and display device |
| CN103681767B (en) * | 2013-12-19 | 2017-01-04 | 中国科学院上海高等研究院 | AMOLED pixel-driving circuit, driving method and array drive system |
| CN203760050U (en) * | 2014-03-31 | 2014-08-06 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN103943067B (en) * | 2014-03-31 | 2017-04-12 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN103956142B (en) * | 2014-05-15 | 2016-03-09 | 深圳市华星光电技术有限公司 | Panel drive circuit and panel driving method |
| CN104680982B (en) * | 2015-03-27 | 2017-03-08 | 深圳市华星光电技术有限公司 | AMOLED pixel-driving circuit and image element driving method |
| CN105654904B (en) * | 2016-03-24 | 2018-02-23 | 东南大学 | A kind of AMOLED pixel circuit and driving method |
| CN107103878B (en) * | 2017-05-26 | 2020-07-03 | 上海天马有机发光显示技术有限公司 | Array substrate, driving method thereof, organic light emitting display panel and display device |
| CN111369936A (en) * | 2020-04-10 | 2020-07-03 | 深圳市华星光电半导体显示技术有限公司 | Light-emitting drive circuit, drive method thereof and display panel |
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| WO2022007185A1 (en) | 2022-01-13 |
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