CN116030750A - Driving method of display device and display device - Google Patents
Driving method of display device and display device Download PDFInfo
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Abstract
The invention discloses a driving method of a display device and the display device. The driving method of the display device includes receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame; comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result; and adjusting the initialization voltage transmitted on the initialization line according to the comparison result. The technical scheme provided by the embodiment of the invention solves the problem of charge waste of the display device in the initialization stage.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method of a display device and a display device.
Background
With the development of display technology, the requirements of people on the display technology are also increasing. The modular structure of the display panel is more and more complex, and in order to improve the display effect of the display device, each pixel of the display device needs to be initialized. In the conventional initialization method of the display device, each pixel circuit needs to be initialized before each data writing, which causes a great amount of charge waste.
Disclosure of Invention
The invention provides a driving method of a display device and the display device, which are used for solving the problem of charge waste of the display device in an initialization stage.
According to an aspect of the present invention, there is provided a driving method of a display device, including:
receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame;
comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result;
and adjusting the initialization voltage transmitted on the initialization line according to the comparison result.
Optionally, the receiving the data voltage includes:
the data voltage is received through the data comparator.
Optionally, the comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result includes:
and the data voltage of the current frame is differenced with the data voltage of the next frame through a data comparator, and a comparison result is generated.
Optionally, the adjusting the initialization voltage transmitted on the initialization line according to the comparison result includes:
when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, controlling the initialization line not to output the initialization voltage;
when the data voltage of the next frame is smaller than the data voltage of the current frame, determining a first initialization voltage according to the data voltage of the current frame and the data voltage of the next frame, and controlling the initialization line to output the first initialization voltage.
Optionally, the determining the first initialization voltage according to the data voltage of the current frame and the data voltage of the next frame includes:
the data voltage of the current frame and the data voltage of the next frame are subjected to difference, and the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit connected with the first initialization voltage is determined to be smaller than the first initialization voltage;
wherein each column of the pixel circuits shares one initializing line; the initialization lines employed by the pixel circuits of adjacent columns are different.
According to another aspect of the present invention, there is provided a display device for use in the driving method of the display device set forth in any of the first aspects,
the display device includes:
the data comparator is used for receiving the data voltage, comparing the data voltage of the current frame with the data voltage of the next frame and generating a comparison result; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame;
the control module is connected with the data comparator and is used for adjusting the initialization voltage transmitted on the initialization line according to the comparison result.
Optionally, the display device further includes:
a plurality of pixel circuits are provided in the array,
a plurality of initialization lines for transmitting an initialization voltage to the pixel circuits;
a plurality of data lines for transmitting data voltages to the pixel circuits;
the pixel circuit includes a driving circuit and a light emitting element; the driving circuit is connected with the light-emitting element and is used for driving the light-emitting element to emit light;
the driving circuit includes a driving transistor, and the initialization line is used for transmitting an initialization voltage to a gate of the driving transistor so that the data line writes the data voltage to an anode of the light emitting element.
Optionally, the control module is specifically configured to:
when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, the control module is used for controlling the initialization line not to output the initialization voltage;
when the data voltage of the next frame is smaller than the data voltage of the current frame, the control module is used for controlling the initialization line to output a first initialization voltage, wherein the first initialization voltage is determined according to the data voltage of the current frame and the data voltage of the next frame.
Optionally, the control module is specifically configured to:
when the data voltage of the next frame is smaller than the data voltage of the current frame, controlling the initialization line to output a first initialization voltage, wherein the first initialization voltage is smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit connected with the initialization line;
each column of the pixel circuits shares one initializing line; the initialization lines adopted by the pixel circuits of two adjacent columns are different;
preferably, the number of the initialization lines is equal to the number of the data lines.
Optionally, the display device further includes: a computing unit and a storage module;
the computing unit is connected with the storage module, and the storage module calls the data voltage of the current frame and the data voltage of the next frame from the computing unit;
the data comparator is connected with the storage module and is used for receiving the data voltage of the current frame and the data voltage of the next frame from the storage module.
According to the technical scheme, the data voltage of the current frame is compared with the data voltage of the next frame to generate a comparison result, and the initialization voltage transmitted on the initialization line is regulated according to the comparison result. The arrangement can better ensure the display effect of the display device and save the charge waste caused by the initialization voltage on the initialization line.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a driving method of a display device according to an embodiment of the present invention;
fig. 2 is a flowchart of another driving method of a display device according to an embodiment of the present invention;
fig. 3 is a flowchart of a driving method of a display device according to another embodiment of the present invention;
fig. 4 is a flowchart of a driving method of a display device according to another embodiment of the present invention;
fig. 5 is a flowchart of a driving method of a display device according to still another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of still another display device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As mentioned in the background art, in order to improve the display effect of the display device, it is necessary to initialize each pixel of the display device. In the conventional initialization method of the display device, each pixel circuit needs to be initialized before each data writing, which causes a great amount of charge waste. The inventor has long studied and found that the conventional pixel circuit operation in the existing display device is generally divided into three phases, namely a reset phase, a compensation phase and a lighting phase. In order to avoid the situation that the next frame data voltage cannot be written in, the prior display device needs to reset the potential of the gate of the driving transistor to the initialization voltage every time in the reset stage, but a great amount of charges are wasted.
Fig. 1 is a flowchart of a driving method of a display device according to an embodiment of the present invention. Referring to fig. 1, the driving method of the display device provided in this embodiment includes:
s101, receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame.
Specifically, a data voltage is acquired, the data voltage including a data voltage of a current frame and a data voltage of a next frame. The data voltage may be obtained directly by the computing unit or may be obtained by the data comparator.
S102, comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result.
Specifically, the data voltage of the next frame is compared with the data voltage of the current frame. For example, the data voltage of the next frame may be differenced or multiplied by the data voltage of the current frame, the magnitudes of the data voltage of the next frame and the data voltage of the current frame may be compared, and the comparison result may be generated.
S103, according to the comparison result, regulating the initialization voltage transmitted on the initialization line.
Specifically, according to the comparison result of the data voltage of the next frame and the data voltage of the current frame, the initialization voltage transmitted on the initialization line is adjusted, so that the initialization voltage transmitted on the initialization line is associated with the data voltage of the next frame of the pixel circuit, and when the data voltage of the next frame does not need to be initialized, the initialization voltage can not be transmitted on the initialization line, thereby better saving the waste of charges transmitted on the initialization line. When the data voltage of the next frame needs to be initialized, the initialization voltage may be transmitted to the pixel circuit on the initialization line. The arrangement can better ensure the display effect of the display device and save the charge waste caused by the initialization voltage on the initialization line.
The driving method of the display device provided by the embodiment of the invention is characterized in that the data voltage is received, the data voltage of the current frame of the received data voltage is compared with the data voltage of the next frame, a comparison result is generated, and the initialization voltage transmitted on the initialization line is regulated according to the comparison result. The arrangement can better ensure the display effect of the display device and save the charge waste caused by the initialization voltage on the initialization line.
Fig. 2 is a flowchart of another driving method of a display device according to an embodiment of the present invention. Referring to fig. 2, the driving method of the display device provided in this embodiment includes:
s201, receiving the data voltage through a data comparator.
Specifically, the data comparator may acquire the data voltage. The display device may include a computing unit and a control module and a storage module. The computing unit may be a central controller of the display device, the control module may be a driving chip, and the storage module may be a RAM (random access memory ). The memory module invokes the data voltage of the current frame and the data voltage of the next frame from the computing unit, and the data comparator can be integrated in the driving chip and receives the data voltage of the current frame and the data voltage of the next frame stored in the memory module.
S202, comparing the data voltage of the current frame with the data voltage of the next frame through a data comparator to generate a comparison result.
S103, according to the comparison result, regulating the initialization voltage transmitted on the initialization line.
Fig. 3 is a flowchart of a driving method of a display device according to another embodiment of the present invention. Referring to fig. 3, the driving method of the display device provided in this embodiment includes:
s101, receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame.
S301, the data voltage of the current frame and the data voltage of the next frame are subjected to difference through a data comparator, and a comparison result is generated.
In particular, such an arrangement may facilitate the data comparator to perform a fast calculation and output the comparison result. On the other hand, the magnitude of the difference between the data voltage of the current frame and the data voltage of the next frame is convenient, the basis for adjusting the initialization voltage transmitted on the initialization line is determined, and the calculation time is further saved.
S103, according to the comparison result, regulating the initialization voltage transmitted on the initialization line.
Fig. 4 is a flowchart of a driving method of a display device according to another embodiment of the present invention. Referring to fig. 4, the driving method of the display device provided in this embodiment includes:
s101, receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame.
S102, comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result.
S401, when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, the initialization line is controlled not to output the initialization voltage.
Specifically, when the data voltage of the next frame is greater than the data voltage of the current frame, the gate-source voltage of the driving transistor is the sum of the data voltage of the current frame and the threshold voltage of the driving transistor, and then the difference between the gate-source voltage of the driving transistor and the data voltage of the next frame is equal to or less than the threshold voltage of the driving transistor, the driving transistor can be turned on at this time, the gate of the driving transistor is not required to be reset, and the data voltage of the next frame can be written into the anode of the light emitting element. At this time, the initializing line is controlled not to output initializing voltage, so that unnecessary waste of charges transmitted on the initializing line can be well avoided.
When the data voltage of the next frame is equal to the data voltage of the current frame, the data voltage of the current frame can be written, the data voltage of the next frame which is equal to the data voltage of the current frame can be written continuously, the grid electrode of the driving transistor does not need to be reset, and the data voltage of the next frame can be written into the anode of the light-emitting element. At this time, the initializing line is controlled not to output initializing voltage, so that unnecessary waste of charges transmitted on the initializing line can be well avoided.
S402, when the data voltage of the next frame is smaller than the data voltage of the current frame, determining a first initialization voltage according to the data voltage of the current frame and the data voltage of the next frame, and controlling the initialization line to output the first initialization voltage.
Specifically, when the data voltage of the next frame is smaller than the data voltage of the current frame, the data voltage of the next frame can be written into the gate of the driving transistor because the gate of the driving transistor needs to be reset at this time. The control initialization line outputs a first initialization voltage at this time. The first initialization voltage is determined according to the data voltage of the current frame and the data voltage of the next frame, and the first initialization voltage is required to be smaller than the sum of the data voltage of the next frame and the threshold voltage of the driving transistor, so that the data voltage of the next frame can be smoothly written into the grid electrode of the driving transistor, the first initialization voltage of the initialization line uploading power is lower, and unnecessary waste of charges transmitted on the initialization line can be well avoided.
Fig. 5 is a flowchart of a driving method of a display device according to another embodiment of the present invention. Referring to fig. 5, the driving method of the display device provided in the present embodiment includes:
s101, receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame.
S102, comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result.
S401, when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, the initialization line is controlled not to output the initialization voltage.
S501, performing difference on the data voltage of the current frame and the data voltage of the next frame, and determining that the first initialization voltage is smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit connected with the initialization line; wherein each column of the pixel circuits shares one initializing line; the initialization lines employed by the pixel circuits of adjacent columns are different.
Specifically, since the sum of the data voltage of the current frame and the threshold value of the driving transistor and the initialization voltage, the difference between the data voltage of the current frame and the next frame needs to be smaller than the threshold value of the driving transistor, so that the next frame data voltage can be written into the anode of the driving transistor. That is, when the data voltage of the next frame is smaller than the data voltage of the current frame, the first initialization voltage outputted by the control module 5 controlling the initialization line Vref needs to be smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit 1 to which the initialization line Vref is connected. This arrangement can not only ensure the display effect of the display device 100, but also further save the charge waste caused by the initialization voltage on the initialization line Vref.
S502, when the data voltage of the next frame is smaller than the data voltage of the current frame, controlling the initialization line to output the first initialization voltage.
Fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention. The display device 100 provided in the embodiment of the invention includes:
a data comparator 4 for receiving the data voltage and comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame;
the control module 5 is connected with the data comparator 4, and the control module 5 is used for adjusting the initialization voltage transmitted on the initialization line according to the comparison result.
The display device provided by the embodiment of the invention receives the data voltage through the data comparator, compares the data voltage of the current frame with the data voltage of the next frame, and generates a comparison result; and adjusting the initialization voltage transmitted on the initialization line by the control module according to the comparison result. The arrangement can enable the control module to calculate accurate initialization voltage, ensure that the driving transistor can be turned on, ensure that data voltage of the next frame can be written in normally, better ensure the display effect of the display device, and save charge waste caused by the initialization voltage on the initialization line.
Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 7, a display device 100 according to an embodiment of the present invention includes a plurality of pixel circuits 1, a plurality of initialization lines Vref for transmitting initialization voltages to the pixel circuits 1; a plurality of data lines Vdata for transmitting data voltages to the pixel circuit 1. The data comparator 4 is used for receiving the data voltage and comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result; the data voltage comprises the data voltage of the current frame and the data voltage of the next frame; the control module 5, the control module 5 is connected with the data comparator 4, and the control module 5 is used for adjusting the initialization voltage transmitted on the initialization line Vref according to the comparison result.
Specifically, the display device 100 may include a substrate, and the pixel circuit 1 may be disposed on the substrate. The pixel circuits 1 may be arranged in an array, and the pixel circuits 1 are configured to emit light under the driving of the driving signal, so that the display device 100 displays a picture.
The data line Vdata is used for transmitting a data signal to the pixel circuit 1, and the pixel circuit 1 transmits a data voltage to the anode of the light emitting element D1 of the pixel circuit 1 according to a control signal such as a clock or a light emission control signal, so that the pixel circuit 1 can emit light to display a picture.
The initialization lines Vref are used for transmitting initialization voltages to the pixel circuits 1, and the number of the initialization lines Vref is set to be multiple, so that the magnitude of the initialization voltages transmitted on each initialization line Vref can be different, different initialization voltages can be transmitted by adopting different initialization lines Vref according to the needs of each pixel circuit 1, the initialization voltages can be transmitted to each pixel circuit 1 according to the needs, unnecessary initialization voltages are prevented from being transmitted to the pixel circuits 1 which do not need the initialization voltages by the initialization lines Vref because the pixel circuits 1 do not need the initialization voltages, charges on the initialization lines Vref are saved, the display effect of the display device 100 can be ensured, and the energy-saving effect of the display device 100 is improved.
The data comparator 4 may acquire a data voltage and compare the data voltage of the next frame with the data voltage of the current frame. The control module 5 adjusts the initialization voltage transmitted on the initialization line Vref according to the comparison result of the data voltage of the next frame and the data voltage of the current frame. The arrangement is such that the initialization voltage transmitted on the initialization line Vref is associated with the data voltage of the next frame of the pixel circuit 1, and when the data voltage of the next frame does not need to be initialized, the initialization voltage may not be transmitted on the initialization line Vref, so that waste of charges transmitted on the initialization line Vref may be better saved. When the data voltage of the next frame needs to be initialized, an initialization voltage can be transmitted to the pixel circuit 1 on the initialization line Vref. This arrangement can better ensure the display effect of the display device 100 and save the charge waste caused by the initialization voltage on the initialization line Vref.
The display device 100 according to the embodiment of the present invention is configured to transmit an initialization voltage to the pixel circuit 1 through the initialization line Vref, and transmit a data voltage to the pixel circuit 1 through the data line Vdata by providing the plurality of initialization lines Vref, the plurality of data lines Vdata, the data comparator 4, and the control module 5. The data voltage is received by the data comparator 4, and the data voltage of the current frame is compared with the data voltage of the next frame to generate a comparison result. The control module 5 adjusts the initialization voltage transmitted on the initialization line Vref according to the comparison result. This arrangement can better ensure the display effect of the display device 100 and save the charge waste caused by the initialization voltage on the initialization line Vref.
Optionally, fig. 8 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention. On the basis of the above-described embodiments, referring to fig. 7 and 8, the pixel circuit 1 of the display device 100 according to the embodiment of the present invention includes a driving circuit 11 and a light emitting element D1; the driving circuit 11 is connected to the light emitting element D1, and the driving circuit 11 is configured to drive the light emitting element D1 to emit light; the driving circuit 11 includes a driving transistor, and an initialization line Vref is used to transmit an initialization voltage to a gate of the driving transistor so that the data line Vdata writes a data voltage to an anode of the light emitting element D1.
Specifically, each light emitting element D1 may correspond to one driving circuit 11, and each driving circuit 11 is connected to the data line Vdata and the initialization line Vref, respectively. Fig. 1 exemplarily illustrates a case where the array substrate 100 is disposed in the display panel 300. The display device 100 may include a display panel 200 including a substrate and a plurality of light emitting elements D1 disposed on the substrate, each light emitting element D1 corresponding to one of the driving circuits 11. The display panel includes a first power line VDD, a second power line VSS, and a plurality of initialization lines Vref. Each of the driving circuits 11 is connected to a first power supply line VDD, a second power supply line VSS, and an initialization line Vref, respectively. The driving circuit 11 includes a plurality of thin film transistors and storage capacitors, and the thin film transistors may include a driving transistor T1 and a switching transistor, and the driving transistor T1 and the light emitting element D1 are sequentially connected between the first power line VDD and the second power line VSS. The driving transistor T1 may generate a driving current to drive the light emitting element D1 connected to the driving circuit 11 to emit light, and the switching transistor mainly plays a role of switching.
Referring to fig. 7, the substrate may further include a plurality of Scan lines Scan, a plurality of data lines Vdata, a plurality of light emission control lines EM, and a control module 5, the driving circuit 11 may be disposed in a region defined by the Scan lines Scan and the data lines Vdata, the Scan lines Scan input Scan signals to the corresponding driving circuit 11, the driving circuit 111 is connected to the data lines Vdata corresponding to the driving circuit 111 under the action of the Scan signals input by the Scan lines Scan electrically connected thereto, and the control module 5 inputs data signals to the corresponding driving circuit 111 through the data lines Vdata, wherein the voltage of the data signals corresponds to the driving voltage, so as to determine the light emission brightness of the light emitting element D1, that is, determine the display gray scale of the light emitting element D1. The driving transistor, the switching transistor, the storage capacitor, and the light emitting element D1 may form a plurality of types of pixel circuits 1 in a plurality of connection relations. The pixel circuit 1 shown in fig. 2 is only an example, and other forms of pixel circuits 1 are also possible, such as a 3T1C pixel circuit 1,7T1C pixel circuit 1 and an 8T2C pixel circuit 1, where T represents a transistor and C represents a capacitor. Fig. 3 exemplarily shows the case of the 7T1C pixel circuit 1, and is not limited to the pixel circuit 1.
Referring to fig. 7 and 8, the first power line VDD may be used to transmit a first power signal and the second power line VSS may be used to transmit a second power signal. The voltage on the first power line VDD is typically a high level voltage and the voltage on the second power line VSS is typically a low level voltage. In the light emitting stage, a first power signal on the first power line VDD is applied to a first pole of the driving transistor T1, a second power signal on the second power line VSS is applied to a second pole, e.g., a second pole is a cathode, of the light emitting element D1, and the first power signal and the second power signal serve as power sources for generating a driving current for the driving transistor T1, so that the driving transistor T1 generates the driving current to drive the light emitting element D1 to emit light. The first power supply line VDD may be a signal line directly connected to one pole (e.g., drain or source) of the driving transistor T1 in the pixel circuit 1, or a signal line indirectly connected to one pole of the driving transistor T1 in the pixel circuit 1 through a switching transistor (e.g., light emission control transistor), and the second power supply line VSS may be a signal line connected to the cathode of the light emitting element D1. The initialization line Vref may be used to transmit an initialization signal to the pixel circuit 1, for example, the initialization line Vref may be connected to the gate electrode and the storage capacitor of the driving transistor T1 through a switching transistor, an initialization voltage is written into the gate electrode and the storage capacitor Cst of the driving transistor T1 through the initialization line Vref and the switching transistor connected thereto, and the gate electrode and the storage capacitor Cst of the driving transistor T1 are initialized to remove residual charges of the current frame display screen, so as to avoid affecting the next frame display screen. The initialization line Vref can also be connected to the anode of the light emitting element D1 through a switching transistor, the initialization voltage is written into the anode of the light emitting element D1 through the initialization line Vref and the switching transistor connected with the initialization line Vref, and the potential of the anode of the light emitting element D1 is initialized so as to remove residual charges of the display picture of the current frame and avoid affecting the display picture of the next frame.
Optionally, on the basis of the above embodiment, with continued reference to fig. 7 and 8, when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, the control module 5 is configured to control the initialization line Vref not to output the initialization voltage; the control module 5 is configured to control the initialization line Vref to output a first initialization voltage when the data voltage of the next frame is smaller than the data voltage of the current frame, wherein the first initialization voltage is determined according to the data voltage of the current frame and the data voltage of the next frame.
Specifically, when the data voltage of the next frame is greater than the data voltage of the current frame, the gate-source voltage of the driving transistor is the sum of the data voltage of the current frame and the threshold voltage of the driving transistor, and the difference between the gate-source voltage of the driving transistor and the data voltage of the next frame is smaller than the threshold voltage of the driving transistor, so that the driving transistor can be turned on, the gate of the driving transistor does not need to be reset, and the data voltage of the next frame can be written into the anode of the light emitting element D1. At this time, the control module 5 controls the initialization line Vref not to output the initialization voltage, so that unnecessary waste of charges transmitted on the initialization line Vref can be well avoided.
When the data voltage of the next frame is equal to the data voltage of the current frame, the data voltage of the current frame can be written, the data voltage of the next frame which is equal to the data voltage of the current frame can be written continuously, the grid electrode of the driving transistor does not need to be reset, and the data voltage of the next frame can be written into the anode of the light emitting element D1. At this time, the control module 5 controls the initialization line Vref not to output the initialization voltage, so that unnecessary waste of charges transmitted on the initialization line Vref can be well avoided.
When the data voltage of the next frame is smaller than the data voltage of the current frame, the gate of the driving transistor can be written into the gate of the driving transistor only when the gate of the driving transistor needs to be reset at the moment. At this time, the control module 5 controls the initialization line Vref to output the first initialization voltage. The first initialization voltage is determined according to the data voltage of the current frame and the data voltage of the next frame, and the first initialization voltage needs to be smaller than the sum of the data voltage of the next frame and the threshold voltage of the driving transistor, so that the data voltage of the next frame can be smoothly written into the grid electrode of the driving transistor, the first initialization voltage for transmitting electricity on the initialization line Vref is lower, and unnecessary waste of charges transmitted on the initialization line Vref can be well avoided.
Optionally, fig. 9 is a schematic structural diagram of another display device according to an embodiment of the present invention. On the basis of the above-described embodiment, referring to fig. 9, each column of pixel circuits 1 shares one initialization line Vref; the initialization lines Vref employed by the pixel circuits 1 of the adjacent two columns are different.
Specifically, the number of the initialization lines Vref is increased, so that the corresponding initialization voltage is conveniently output or not transmitted according to the requirement of the next frame data voltage of the light emitting element D1 of the pixel circuit 1, the electric charge on the initialization lines Vref is further saved, and the unnecessary waste of the electric charge transmitted on the initialization lines Vref can be better avoided. Note that, the display device shown in fig. 9 includes N initialization lines, which are the first initialization line Vref1, the second initialization line Vref2, and the nth initialization line Vref N, respectively, and are not limited in any way.
Alternatively, with continued reference to fig. 9, the number of initialization lines Vref is equal to the number of data lines Vdata on the basis of the above-described embodiment.
Specifically, the initialization line Vref can independently control each pixel circuit 1, so that the initialization line Vref can output different initialization voltages according to the needs of each pixel circuit 1, the initialization signals of each pixel circuit 1 can be accurately controlled conveniently, the display effect of the display device 100 can be ensured, and the charge waste caused by the initialization voltages on the initialization line Vref can be further saved.
Alternatively, on the basis of the above-described embodiment, referring to fig. 9, when the data voltage of the next frame is smaller than the data voltage of the current frame, the control module 5 is configured to control the initialization line Vref to output a first initialization voltage, wherein the first initialization voltage is smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit 1 to which the initialization line Vref is connected.
Specifically, since the sum of the data voltage of the current frame and the threshold value of the driving transistor and the initialization voltage, the difference between the data voltage of the current frame and the next frame needs to be smaller than the threshold value of the driving transistor, so that the next frame data voltage can be written into the anode of the driving transistor. That is, when the data voltage of the next frame is smaller than the data voltage of the current frame, the first initialization voltage outputted by the control module 5 controlling the initialization line Vref needs to be smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit 1 to which the initialization line Vref is connected. This arrangement can not only ensure the display effect of the display device 100, but also further save the charge waste caused by the initialization voltage on the initialization line Vref.
Optionally, fig. 10 is a schematic structural diagram of still another display device according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 10, the display device 100 provided in the embodiment of the present invention may further include: a calculation unit 6 and a storage module 7; the computing unit 6 is connected with the storage module 7, and the storage module 7 calls the data voltage of the current frame and the data voltage of the next frame from the computing unit 6; the data comparator 4 is connected to the memory module 7, and the data comparator 4 is configured to receive the data voltage of the current frame and the data voltage of the next frame from the memory module 7.
Specifically, the computing unit 6 may be a central controller of the display device 100, the control module 5 may be a driving chip, and the storage module 7 may be a RAM (random access memory ). The storage module 7 invokes the data voltage of the current frame and the data voltage of the next frame from the computing unit 6, the data comparator 4 can be integrated in a driving chip, and the data comparator 4 receives the data voltage of the current frame and the data voltage of the next frame stored in the storage module 7, so that the data voltage of the current frame and the data voltage of the next frame can be conveniently compared, and a comparison result is generated.
The arrangement is such that the data comparison module can obtain the data voltage of the current frame and the data voltage of the next frame, so that the control module 5 can adjust the initialization voltage transmitted on the initialization line Vref according to the comparison result of the data voltage of the next frame and the data voltage of the current frame. When the data voltage of the next frame does not need to be initialized, the initialization voltage can not be transmitted on the initialization line Vref, so that the waste of the electric charges transmitted on the initialization line Vref can be well saved. When the data voltage of the next frame needs to be initialized, an initialization voltage can be transmitted to the pixel circuit 1 on the initialization line Vref. This arrangement can better ensure the display effect of the display device 100 and save the charge waste caused by the initialization voltage on the initialization line Vref.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A driving method of a display device, comprising:
receiving a data voltage; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame;
comparing the data voltage of the current frame with the data voltage of the next frame to generate a comparison result;
and adjusting the initialization voltage transmitted on the initialization line according to the comparison result.
2. The method of claim 1, wherein the receiving the data voltage comprises:
the data voltage is received through the data comparator.
3. The method of claim 1, wherein comparing the data voltage of the current frame with the data voltage of the next frame generates a comparison result, comprising:
and the data voltage of the current frame is differenced with the data voltage of the next frame through a data comparator, and a comparison result is generated.
4. The method of claim 1, wherein adjusting the initialization voltage transmitted on the initialization line based on the comparison result comprises:
when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, controlling the initialization line not to output the initialization voltage;
when the data voltage of the next frame is smaller than the data voltage of the current frame, determining a first initialization voltage according to the data voltage of the current frame and the data voltage of the next frame, and controlling the initialization line to output the first initialization voltage.
5. The method of claim 4, wherein determining the first initialization voltage based on the data voltage of the current frame and the data voltage of the next frame comprises:
the data voltage of the current frame and the data voltage of the next frame are subjected to difference, and the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit connected with the first initialization voltage is determined to be smaller than the first initialization voltage;
wherein each column of the pixel circuits shares one initializing line; the initialization lines employed by the pixel circuits of adjacent columns are different.
6. A display device characterized in that the display device is configured to perform the driving method of the display device according to any one of claims 1 to 5;
the display device includes:
the data comparator is used for receiving the data voltage, comparing the data voltage of the current frame with the data voltage of the next frame and generating a comparison result; wherein the data voltages include a data voltage of a current frame and a data voltage of a next frame;
the control module is connected with the data comparator and is used for adjusting the initialization voltage transmitted on the initialization line according to the comparison result.
7. The display device according to claim 6, characterized in that the display device further comprises:
a plurality of pixel circuits are provided in the array,
a plurality of initialization lines for transmitting an initialization voltage to the pixel circuits;
a plurality of data lines for transmitting data voltages to the pixel circuits;
the pixel circuit includes a driving circuit and a light emitting element; the driving circuit is connected with the light-emitting element and is used for driving the light-emitting element to emit light;
the driving circuit includes a driving transistor, and the initialization line is used for transmitting an initialization voltage to a gate of the driving transistor so that the data line writes the data voltage to an anode of the light emitting element.
8. The display device of claim 7, wherein the control module is specifically configured to:
when the data voltage of the next frame is greater than or equal to the data voltage of the current frame, the control module is used for controlling the initialization line not to output the initialization voltage;
when the data voltage of the next frame is smaller than the data voltage of the current frame, the control module is used for controlling the initialization line to output a first initialization voltage, wherein the first initialization voltage is determined according to the data voltage of the current frame and the data voltage of the next frame.
9. The display device of claim 8, wherein the control module is specifically configured to:
when the data voltage of the next frame is smaller than the data voltage of the current frame, controlling the initialization line to output a first initialization voltage, wherein the first initialization voltage is smaller than the absolute value of the difference between the data voltage of the current frame and the data voltage of the next frame of the pixel circuit connected with the initialization line;
each column of the pixel circuits shares one initializing line; the initialization lines adopted by the pixel circuits of two adjacent columns are different;
preferably, the number of the initialization lines is equal to the number of the data lines.
10. The display device according to claim 9, wherein the display device further comprises: a computing unit and a storage module;
the computing unit is connected with the storage module, and the storage module calls the data voltage of the current frame and the data voltage of the next frame from the computing unit;
the data comparator is connected with the storage module and is used for receiving the data voltage of the current frame and the data voltage of the next frame from the storage module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116741094A (en) * | 2023-06-28 | 2023-09-12 | 惠科股份有限公司 | Display panel, display driving method and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116741094A (en) * | 2023-06-28 | 2023-09-12 | 惠科股份有限公司 | Display panel, display driving method and display device |
| CN116741094B (en) * | 2023-06-28 | 2024-06-07 | 惠科股份有限公司 | Display panel, display driving method and display device |
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