CN108665844A - Display device and its driving method, driving device - Google Patents
Display device and its driving method, driving device Download PDFInfo
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- CN108665844A CN108665844A CN201810489238.3A CN201810489238A CN108665844A CN 108665844 A CN108665844 A CN 108665844A CN 201810489238 A CN201810489238 A CN 201810489238A CN 108665844 A CN108665844 A CN 108665844A
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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
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a kind of display device and its driving method, driving devices.Belong to display technology field.This method can provide power supply signal according to the first duty ratio when it is the display stage to detect the current driving stage for driving circuit；And when it is blanking period to detect the current driving stage, power supply signal is provided for driving circuit according to the second duty ratio less than first duty ratio.And due in the blanking period, driving circuit is without the pixel transmission image data into display panel, it is not necessarily to drive scanning element, driving circuit is of less demanding to the power supply characteristic of power supply signal, therefore in the blanking period according to smaller duty ratio power supply signal is provided for driving circuit, the power consumption of display device can be reduced under the premise of not influencing the display effect of display device.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of display devices and its driving method, driving device.
Background technology
Display device needs to use power management integrated circuit (Power Management when showing image
Integrated Circuit, PMIC) it charges to the driving circuit in display device.Driving circuit is in driving display device
The process that display image is shown generally may include transmission stage (showing the stage) and the blanking period of image data.
In the related technology, in the transmission stage of the image data and blanking period, the analog power supply signal of PMIC offers
Sequential it is identical, and the size of voltage value is identical.The power consumption of display device is larger.
Invention content
The present invention provides a kind of display device and its driving method, driving device, can solve to show in the related technology
The larger problem of the power consumption of device.The technical solution is as follows：
In a first aspect, providing a kind of driving method of display device, the display device includes driving circuit, the side
Method includes：
During driving the display device to show image by the driving circuit, the current driving stage is detected
Whether it is blanking period, the driving stage includes display stage and the blanking period；
When it is the display stage to detect the current driving stage, electricity is provided for the driving circuit according to the first duty ratio
Source signal；
When it is blanking period to detect the current driving stage, electricity is provided for the driving circuit according to the second duty ratio
Source signal；
Wherein, second duty ratio is less than first duty ratio.
Optionally, whether the detection current driving stage is blanking period, including：
Obtain data enable signal；
When it is the first current potential to detect the current potential of the data enable signal, determine that the current driving stage is display rank
Section；
When it is the second current potential to detect the current potential of the data enable signal, determine that the current driving stage is blanking rank
Section.
Optionally, whether the detection current driving stage is blanking period, including：
Detect whether the current driving stage is blanking period by sequential control circuit；
It is described when detect the current driving stage be the display stage when, according to the first duty ratio be the driving circuit carry
Power supply source signal, including：
When detecting that the current driving stage is the display stage by the sequential control circuit, pass through the sequential control
Circuit processed provides the control signal of first duty ratio to power driving circuit；
By the power driving circuit power supply signal is provided to the driving circuit according to first duty ratio；
It is described when detect the current driving stage be blanking period when, according to the second duty ratio be the driving circuit carry
Power supply source signal, including：
When detecting that the current driving stage is blanking period by the sequential control circuit, pass through the sequential control
Circuit processed provides the control signal of second duty ratio to the power driving circuit；
By the power driving circuit power supply signal is provided to the driving circuit according to second duty ratio.
Optionally, the blanking period includes horizontal blanking stage and vertical blanking period.
Optionally, according to the variation model for the current potential that first duty ratio is the power supply signal that the driving circuit provides
It encloses, more than the variation range according to the current potential that second duty ratio is the power supply signal that the driving circuit provides.
Second aspect, provides a kind of driving device of display device, and the driving device includes：Sequential control circuit with
And the power driving circuit being connect with the sequential control circuit；
The sequential control circuit, for during driving display device to show image by driving circuit, detecting
Whether the current driving stage is blanking period, and the driving stage includes display stage and the blanking period；
The power driving circuit, for detecting that the current driving stage is the display stage when the sequential control circuit
When, power supply signal is provided for the driving circuit according to the first duty ratio, and when the sequential control circuit detects currently
The driving stage be blanking period when, provide power supply signal according to the second duty ratio for the driving circuit；
Wherein, second duty ratio is less than first duty ratio.
Optionally, the sequential control circuit, is used for：
Obtain data enable signal；
When it is the first current potential to detect the data enable signal, determine that the current driving stage is the display stage；
When it is the second current potential to detect the data enable signal, determine that the current driving stage is blanking period.
Optionally, the sequential control circuit, for when it is the display stage to detect the current driving stage, to described
Power driving circuit provides the control signal of first duty ratio, and works as and detect that the current driving stage is blanking period
When, the control signal of second duty ratio is provided to the power driving circuit；
The power driving circuit, for the control signal according to first duty ratio, according to first duty ratio
There is provided power supply signal to driving circuit, and according to the control signal of second duty ratio, according to second duty ratio to
The driving circuit provides power supply signal.
Optionally, the power driving circuit includes：Current source, inductance, capacitance, resistance, transistor and diode；
One end of the current source is connect with first node, and the other end of the current source and one end of the inductance connect
It connects, the other end of the inductance is connect with second node；
One end of the diode is connect with the second node, and the other end is connect with third node；
One end of the resistance is connect with the first node, and the other end of the resistance is connect with the third node,
One end of the capacitance is connect with the first node, and the other end of the capacitance is connect with the third node；
The grid of the transistor is connect with the sequential control circuit, and the first pole of the transistor is saved with described second
Point connection, the second pole of the transistor is connect with power end.
The third aspect, provides a kind of display device, and the display device includes the driving device as described in second aspect.
The advantageous effect that technical solution provided by the invention is brought is：
In conclusion an embodiment of the present invention provides a kind of display device and its driving method, driving devices.This method can
When detecting that the current driving stage is the display stage, power supply signal is provided for driving circuit according to the first duty ratio；And
It is driving circuit according to the second duty ratio less than first duty ratio when it is blanking period to detect the current driving stage
Power supply signal is provided.And since in the blanking period, driving circuit is not necessarily to the pixel transmission image data into display panel,
I.e. be not necessarily to drive scanning element, driving circuit of less demanding to the power supply characteristic of power supply signal, therefore the blanking period according to
Smaller duty ratio provides power supply signal for driving circuit, can be dropped under the premise of not influencing the display effect of display device
The power consumption of low display device.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of flow chart of the driving method of display device provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the driving method of another display device provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of the driving device of display device provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of duty ratio of the control signal provided in an embodiment of the present invention in the different driving stage；
Fig. 5 is a kind of schematic diagram of duty ratio of the power supply signal provided in an embodiment of the present invention in the different driving stage；
Fig. 6 is a kind of structural schematic diagram of power driving circuit provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of flow chart of the driving method of display device provided in an embodiment of the present invention, which includes
Driving circuit, with reference to figure 1, this method may include：
Step 101, by driving circuit drive display device show image during, detect the current driving stage
Whether it is blanking period.
In embodiments of the present invention, which can be source electrode drive circuit, and source electrode drive circuit is shown in driving
Device shows that the driving stage of image generally may include display stage and blanking period.The blanking period may include that level disappears
Hidden stage (HBlank) and vertical blanking period (VBlank).Wherein, driving circuit driving one-row pixels scanning is accomplished to driving
Stage before next line picture element scan starts is the horizontal blanking stage；Driving circuit is shown in one frame image of driving is accomplished to drive
Dynamic next frame image starts the stage before display as vertical blanking period.
Step 102, when detect the current driving stage be the display stage when, carried for driving circuit according to the first duty ratio
Power supply source signal.
Wherein, duty ratio refers to the ratio shared by significant level within a pulse period.In embodiments of the present invention, exist
Display stage, driving device are that the power supply signal that driving circuit provides can be used for driving display panel aobvious according to the first duty ratio
Diagram picture.The power supply signal can be analog power supply signal AVDD, and analog power supply signal AVDD can be pulse width tune
Make (Pulse Width Modulation, PWM) signal.
Step 103, when detect the current driving stage be blanking period when, carried for driving circuit according to the second duty ratio
Power supply source signal.
Wherein, which is less than the first duty ratio.When driving device detects that the current driving stage is blanking
When the stage, power supply signal can be provided according to smaller duty ratio, be such as to drive according to the second duty ratio less than the first duty ratio
Dynamic circuit provides power supply signal, so as to effectively reduce the power consumption of display device.And since in the blanking period, driving is electric
Road is not necessarily to drive scanning element, driving circuit is to power supply signal without the pixel transmission image data into display panel
Power supply characteristic is of less demanding, therefore provides power supply signal according to smaller duty ratio in the blanking period, can not influence to show
Under the premise of the display effect of showing device, the power consumption of display device is reduced, the reliability of the driving method is higher.
In conclusion an embodiment of the present invention provides a kind of driving method of display device, this method can detect
When the current driving stage is the display stage, power supply signal is provided for driving circuit according to the first duty ratio；And work as detecting
When the preceding driving stage is blanking period, power supply letter is provided for driving circuit according to the second duty ratio less than first duty ratio
Number.And since in the blanking period, driving circuit is not necessarily to driving without the pixel transmission image data into display panel
Scanning element, driving circuit are of less demanding to the power supply characteristic of power supply signal, therefore in the blanking period according to smaller duty
Than providing power supply signal for driving circuit, display device can be reduced under the premise of not influencing the display effect of display device
Power consumption.
Fig. 2 is the flow chart of the driving method of another display device provided in an embodiment of the present invention, with reference to figure 2, the party
Method may include：
Step 201 obtains data enable signal, and detects the current potential of the data enable signal.
In embodiments of the present invention, driving circuit shows that the driving stage of image generally may include in driving display device
Display stage and blanking period.In the display stage, in order to realize that image is shown, on-chip integration system (System on Chip,
SOC) data enable signal (Data in the first current potential can be inputted to the pixel circuit of each pixel unit of display device
Enable, DE) signal, the pixel circuit in each pixel unit can be under the control of the DE signals of first current potential
Working condition.And in blanking period, display device is without driving the pixel in scanning display panel, and SOC can be to each picture at this time
DE signal of the pixel circuit input in the second current potential of plain unit, pixel circuit in each pixel unit can this
It is stopped under the control of the DE signals of two current potentials, and pixel electrode can be kept aobvious by the storage capacitance in pixel circuit
Show the voltage of stage write-in.Wherein, which can be effective current potential, and first current potential can relative to second current potential
Think high potential.
Therefore, in embodiments of the present invention, driving device can first obtain DE signals, and be believed by detecting the DE got
Number current potential determine whether the current driving stage is blanking period.
Step 202, when detect data enable signal current potential be the first current potential when, determine that the current driving stage is aobvious
Show the stage.
In embodiments of the present invention, when driving device detects that the current potential of the DE signals got is the first current potential, i.e.,
It can determine that the current driving stage is the display stage.Wherein, the display stage refers to that driving circuit carries out image data transmission, real
The stage that existing image is shown.At this point, in order to ensure that display device shows that the quality of image, driving device can execute following step
204。
Step 203, when detect data enable signal current potential be the second current potential when, determine the current driving stage be disappear
The hidden stage.
In embodiments of the present invention, when driving device detects that the current potential of DE signals is the second current potential, you can with determination
The current driving stage is blanking period.Wherein, blanking period may include horizontal blanking stage and vertical blanking period.Its
In, the stage that driving circuit driving one-row pixels scanning is accomplished to before driving next line picture element scan starts is horizontal blanking rank
Section；Driving circuit shows that the stage being accomplished to before driving next frame image starts display is vertical blanking in one frame image of driving
Stage.It that is to say, driving device can be according to the jump in potential moment of the DE signals detected, to determine the starting of blanking period
Moment and finish time.For example, when driving device detects that the current potentials of DE signals by the first jump in potential is the second current potential, i.e.,
It can determine that the moment is the initial time of blanking period；When driving device detects that the current potential of DE signals is jumped by the second current potential again
When becoming the first current potential, you can to determine the moment as the finish time of blanking period.
Further, since in blanking period, driving circuit is not necessarily to the pixel transmission image data into display panel,
It is not necessarily to drive scanning element, driving circuit of less demanding to the power supply characteristic of power supply signal, at this time in order to reduce display device
Power consumption, driving device can execute following step 205.
Step 204 provides power supply signal according to the first duty ratio for driving circuit.
Can be driving circuit according to the first duty ratio after driving device determines that the current driving stage is the display stage
Power supply signal is provided, so that the driving circuit can drive display device display figure according to the power supply signal of first duty ratio
Picture.
In embodiments of the present invention, as shown in figure 3, the driving device 00 of the display device may include sequential control circuit
(Timming Controler, TCON) 10 and the power driving circuit 20 being connect with the sequential control circuit 10, the driving device
00 can connect with the driving circuit 01 of display device.Such as driving circuit 01 shown in Fig. 3 can be source electrode drive circuit, it should
Power driving circuit 20 can be PMIC.If the display device is LCD, in the display stage, the PMIC is electric to source drive
The analog power supply signal AVDD that road provides can be used for that liquid crystal is driven to overturn to change the transmissivity of light, so that LCD is shown
Image.
Optionally, in above-mentioned steps 201, DE signals can be obtained by the sequential control circuit 10, and according to inspection
The current potential of the DE signals measured determines whether the current driving stage is blanking period.
Further, when detecting that the current driving stage is the display stage by sequential control circuit 10, Ke Yitong
Cross the control signal that the sequential control circuit 10 provides the first duty ratio to power driving circuit 20；It may then pass through the power supply
Driving circuit 20 provides power supply signal according to the first duty ratio to driving circuit 01.
Optionally, in embodiments of the present invention, which can be booster circuit (BOOST).Work as power supply
After driving circuit 20 receives the control signal of the first duty ratio, first it can be accounted for according to this under the control of the control signal
Sky to driving circuit 01 than providing power supply signal.
It is exemplary, as shown in figure 4, in display stage T1, sequential control circuit 10 can be provided to power driving circuit 20
The control signal that duty ratio is 50%.Correspondingly, as shown in figure 5, power driving circuit 20 can be in the control of the control signal
Under, according to 50% duty ratio D1 power supply signal is provided to driving circuit 01.
Optionally, power driving circuit 20 is according to the control signal received, to the power supply signal of the offer of driving circuit 01
The current potential V0 of AVDD can meet：V0=Vi/ (1-D), wherein Vi is the voltage at current source both ends in power driving circuit 20
Value, the duty ratio of D signals in order to control.From above-mentioned formula as can be seen that the size of the current potential Vi of power supply signal AVDD and the control
The size of the duty ratio D of signal is directly proportional.
It is exemplary, it is assumed that power driving circuit 20 has received the control signal that the first duty ratio D1 is 50%, and Vi is most
Big value VimaxFor 6 volts (V), minimum value ViminFor 2V.Then power driving circuit 20 is believed according to the control of first duty ratio D1
The maximum value of current potential V0 of number power supply signal AVDD provided to driving circuit 01 can be：V0max=Vimax/ (1-D1)=6/
(1-50%)=12V, minimum value are：V0min=Vimin/ (1-D1)=2/ (1-50%)=4V.
Step 205 provides power supply signal according to the second duty ratio for driving circuit.
Can be driving circuit according to the second duty ratio after driving device determines that the current driving stage is blanking period
Power supply signal is provided.Second duty ratio be less than the first duty ratio, so as to driving device can according to the smaller duty ratio to
Driving circuit provides potential change range smaller power supply signal, so as to effectively reduce the power consumption of display device.
Further, for driving device shown in Fig. 3, when detecting current driving rank by sequential control circuit 10
When section is blanking period, the control that can provide the second duty ratio to power driving circuit 20 by sequential control circuit 10 is believed
Number；It may then pass through the power driving circuit 20 and provide power supply signal to driving circuit 01 according to the second duty ratio.
Optionally, the control signal of second duty ratio D2 can be sequential control circuit 10 according to the image currently shown
Gray value suitably reduce the first duty ratio D1 after obtain, the reduction amplitude can with the gray value of the image currently shown at
It is negatively correlated.I.e. when detecting that the gray value of the image currently shown is higher, reduction amplitude is bigger, correspondingly, the second duty ratio
D2 is smaller.
Exemplary, as shown in figure 4, in blanking period T2, sequential control circuit 10 can be provided to power driving circuit 20
The control signal that duty ratio is 30%.Correspondingly, as shown in figure 5, power driving circuit 20 can be in the control of the control signal
Under, according to 30% duty ratio D2 power supply signal is provided to driving circuit 01.
Optionally, according to above-mentioned formula：V0=Vi/ (1-D) is it is found that when duty ratio D is smaller, according to the smaller duty
Potential change range than the analog power supply signal AVDD provided to driving circuit i.e. can be smaller.Correspondingly, source electrode drive circuit
It can also be become smaller accordingly according to the analog power supply signal AVDD DC power signals (such as VGH and VGL) generated, so as to
To reduce the power consumption of display device.
It is exemplary, it is assumed that power driving circuit 20 has received the control signal that the second duty ratio D2 is 30%, and Vi is most
Big value VimaxFor 6 volts (V), minimum value ViminFor 2V.Then power driving circuit 20 is believed according to the control of second duty ratio D2
The maximum value of current potential V0 of number power supply signal AVDD provided to driving circuit 01 can be：V0max=Vimax/ (1-D2)=6/
(1-30%) ≈ 8.5V, minimum value are：V0min=Vimin/ (1-D2)=2/ (1-30%) ≈ 2.8V.
In summary, when Vi is determined, the power supply that is provided to driving circuit according to the control signal of second duty ratio D2
The variation range of signal is less than the variation of the power supply signal provided to driving circuit according to the control signal of first duty ratio D1
Range.It that is to say, the maximum value of the power supply signal provided to driving circuit according to the control signal of second duty ratio D2 is less than
According to the maximum value for the power supply signal that the control signal of the first duty ratio D1 is provided to driving circuit；According to second duty ratio D2
The minimum value of power supply signal that is provided to driving circuit of control signal again smaller than the control signal according to the first duty ratio D1 to
The minimum value for the power supply signal that driving circuit provides.By in blanking period, being provided to driving circuit according to smaller duty ratio
Power supply signal can obtain the smaller power supply signal of variation range, so as to reduce the power consumption of display device.
Optionally, sequential control circuit 10 can be to second duty ratio D2 of the offer of power driving circuit 20 in blanking period
0 control signal.Correspondingly, the power supply signal that power driving circuit 20 is provided according to second duty ratio to driving circuit accounts for
For sky than being also 0, i.e., the current potential for the power supply signal that the power driving circuit 20 is provided in blanking period can remain invalid current potential.
It should be noted that providing power supply signal to driving circuit according to the second smaller duty ratio, this may be such that
The ripple value (ripple) of the output voltage of power supply signal increases.But due in the blanking period, driving circuit be not necessarily to
Pixel transmission image data in display panel is not necessarily to drive scanning element, power supply characteristic of the driving circuit to power supply signal
It is of less demanding, therefore the increase of the ripple value does not interfere with display device display effect.
It should also be noted that, the priority of the step of driving method of above-mentioned display device provided in an embodiment of the present invention is suitable
Sequence can be adjusted suitably, and step according to circumstances can also accordingly be increased and decreased.Any technology people for being familiar with the art
Member in the technical scope disclosed by the present invention, the method that variation can be readily occurred in, should all cover protection scope of the present invention it
It is interior, therefore repeat no more.
In conclusion an embodiment of the present invention provides a kind of driving method of display device, this method can detect
When the current driving stage is the display stage, power supply signal is provided for driving circuit according to the first duty ratio；And work as detecting
When the preceding driving stage is blanking period, power supply letter is provided for driving circuit according to the second duty ratio less than first duty ratio
Number.And since in the blanking period, driving circuit is not necessarily to driving without the pixel transmission image data into display panel
Scanning element, driving circuit are of less demanding to the power supply characteristic of power supply signal, therefore in the blanking period according to smaller duty
Than providing power supply signal for driving circuit, display device can be reduced under the premise of not influencing the display effect of display device
Power consumption.
The driving device of a kind of display device provided in an embodiment of the present invention, as shown in figure 3, the driving device 00 can wrap
The power driving circuit 20 for including sequential control circuit 10 and being connect with the sequential control circuit 10.
Sequential control circuit 10, for during driving display device to show image by driving circuit, detection to be worked as
Whether the preceding driving stage is blanking period, and the driving stage includes display stage and blanking period.
Power driving circuit 20, for when sequential control circuit 10 detect the current driving stage be the display stage when,
Power supply signal is provided for driving circuit according to the first duty ratio, and when sequential control circuit 10 detects the current driving stage
For blanking period when, provide power supply signal according to the second duty ratio for driving circuit.Wherein, the second duty ratio is less than the first duty
Than.
In conclusion an embodiment of the present invention provides a kind of driving device of display device, which may include
Sequential control circuit and power driving circuit.The power driving circuit can detect current driving in the sequential control circuit
When stage is the display stage, power supply signal is provided for driving circuit according to the first duty ratio；And the power driving circuit can be
When the sequential control circuit detects that the current driving stage is blanking period, according to the second duty less than first duty ratio
Than providing power supply signal for driving circuit.And since in the blanking period, driving circuit is without the pixel into display panel
Image data is transmitted, that is, is not necessarily to drive scanning element, driving circuit of less demanding to the power supply characteristic of power supply signal, therefore at this
Blanking period provides power supply signal according to smaller duty ratio for driving circuit, can be in the display effect for not influencing display device
Under the premise of, reduce the power consumption of display device.
Optionally, which can be used for：Obtain data enable signal.
When it is the first current potential to detect data enable signal, determine that the current driving stage is the display stage；Work as detection
To data enable signal be the second current potential when, determine the current driving stage be blanking period.
Optionally, which can be used for：
When it is the display stage to detect the current driving stage, the control of the first duty ratio is provided to power driving circuit 20
Signal processed, and when it is blanking period to detect the current driving stage, the second duty ratio is provided to power driving circuit 20
Control signal.
Correspondingly, the power driving circuit 20 can be used for the control signal according to first duty ratio, accounted for according to first
Sky to driving circuit than providing power supply signal, and according to the control signal of second duty ratio, according to the second duty ratio to drive
Dynamic circuit provides power supply signal.
Fig. 6 is a kind of structural schematic diagram of driving device provided in an embodiment of the present invention, as shown in fig. 6, the power drives
Circuit 20 may include：Current source Is, inductance L, capacitance C, resistance R, transistor M and diode E.
With reference to figure 6, one end of current source Is can be connect with first node P1, and the other end of current source Is can be with
One end of inductance L connects, and the other end of inductance L can be connect with second node P2.
One end of diode E can be connect with second node P2, and the other end can be connect with third node P3.The resistance
One end of R can be connect with first node P1, and the other end of resistance R can be connect with third node P3, one end of capacitance C
It can be connect with first node P1, the other end of capacitance C can be connect with third node P3.
The grid of transistor E can be connect with sequential control circuit TCON, and the first of transistor E extremely can be with second
Node P2 connections, the second of transistor E can extremely connect with power end.Such as power end can be ground terminal GND in Fig. 6.
In conclusion an embodiment of the present invention provides a kind of driving device of display device, which may include
Sequential control circuit and power driving circuit.The power driving circuit can detect current driving in the sequential control circuit
When stage is the display stage, power supply signal is provided for driving circuit according to the first duty ratio；And the power driving circuit can be
When the sequential control circuit detects that the current driving stage is blanking period, according to the second duty less than first duty ratio
Than providing power supply signal for driving circuit.And since in the blanking period, driving circuit is without the pixel into display panel
Image data is transmitted, that is, is not necessarily to drive scanning element, driving circuit of less demanding to the power supply characteristic of power supply signal, therefore at this
Blanking period provides power supply signal according to smaller duty ratio for driving circuit, can be in the display effect for not influencing display device
Under the premise of, reduce the power consumption of display device.
About the driving device in above-described embodiment, wherein modules execute the concrete mode operated and are somebody's turn to do related
It is described in detail in the embodiment of method, explanation will be not set forth in detail herein.
An embodiment of the present invention provides a kind of display device, which may include：As Fig. 3 or shown in fig. 6 is aobvious
The driving device of showing device.The display device can be：LCD panel, oled panel, AMOLED panel, mobile phone, is put down at Electronic Paper
Any product or portion with display function such as plate computer, television set, display, laptop, Digital Frame, navigator
Part.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of driving method of display device, which is characterized in that the display device includes driving circuit, the method packet
It includes：
During driving the display device to show image by the driving circuit, whether the current driving stage is detected
For blanking period, the driving stage includes display stage and blanking period；
When it is the display stage to detect the current driving stage, power supply letter is provided for the driving circuit according to the first duty ratio
Number；
When it is blanking period to detect the current driving stage, power supply letter is provided for the driving circuit according to the second duty ratio
Number；
Wherein, second duty ratio is less than first duty ratio.
2. according to the method described in claim 1, it is characterized in that, described detect whether the current driving stage is blanking rank
Section, including：
Obtain data enable signal；
When it is the first current potential to detect the current potential of the data enable signal, determine that the current driving stage is the display stage；
When it is the second current potential to detect the current potential of the data enable signal, determine that the current driving stage is blanking period.
3. according to the method described in claim 2, it is characterized in that,
Whether the detection current driving stage is blanking period, including：
Detect whether the current driving stage is blanking period by sequential control circuit；
It is described when detect the current driving stage be the display stage when, provide electricity according to the first duty ratio for the driving circuit
Source signal, including：
When detecting that the current driving stage is the display stage by the sequential control circuit, pass through timing control electricity
Road direction power driving circuit provides the control signal of first duty ratio；
By the power driving circuit power supply signal is provided to the driving circuit according to first duty ratio；
It is described when detect the current driving stage be blanking period when, provide electricity according to the second duty ratio for the driving circuit
Source signal, including：
When detecting that the current driving stage is blanking period by the sequential control circuit, pass through timing control electricity
Power driving circuit described in road direction provides the control signal of second duty ratio；
By the power driving circuit power supply signal is provided to the driving circuit according to second duty ratio.
4. method according to any one of claims 1 to 3, which is characterized in that the blanking period includes the horizontal blanking stage
And vertical blanking period.
5. method according to any one of claims 1 to 3, which is characterized in that
According to the variation range for the current potential that first duty ratio is the power supply signal that the driving circuit provides, it is more than according to institute
State the variation range for the current potential that the second duty ratio is the power supply signal that the driving circuit provides.
6. a kind of driving device of display device, which is characterized in that the driving device includes：Sequential control circuit and with institute
State the power driving circuit of sequential control circuit connection；
The sequential control circuit, for during driving the display device to show image by driving circuit, detecting
Whether the current driving stage is blanking period, and the driving stage includes display stage and the blanking period；
The power driving circuit, for when the sequential control circuit detect the current driving stage be the display stage when,
Power supply signal is provided for the driving circuit according to the first duty ratio, and when the sequential control circuit detects current drive
When the dynamic stage is blanking period, power supply signal is provided for the driving circuit according to the second duty ratio；
Wherein, second duty ratio is less than first duty ratio.
7. device according to claim 6, which is characterized in that the sequential control circuit is used for：
Obtain data enable signal；
When it is the first current potential to detect the data enable signal, determine that the current driving stage is the display stage；
When it is the second current potential to detect the data enable signal, determine that the current driving stage is blanking period.
8. device according to claim 7, which is characterized in that
The sequential control circuit, for when detect the current driving stage be the display stage when, to the power drives electricity
Road provides the control signal of first duty ratio, and when it is blanking period to detect the current driving stage, to described
Power driving circuit provides the control signal of second duty ratio；
The power driving circuit, for according to the control signal of first duty ratio, according to first duty ratio to drive
Dynamic circuit provides power supply signal, and according to the control signal of second duty ratio, according to second duty ratio to described
Driving circuit provides power supply signal.
9. according to any device of claim 6 to 8, which is characterized in that the power driving circuit includes：Current source,
Inductance, capacitance, resistance, transistor and diode；
One end of the current source is connect with first node, and the other end of the current source is connect with one end of the inductance, institute
The other end for stating inductance is connect with second node；
One end of the diode is connect with the second node, and the other end is connect with third node；
One end of the resistance is connect with the first node, and the other end of the resistance is connect with the third node, described
One end of capacitance is connect with the first node, and the other end of the capacitance is connect with the third node；
The grid of the transistor is connect with the sequential control circuit, and the first pole and the second node of the transistor connect
It connects, the second pole of the transistor is connect with power end.
10. a kind of display device, which is characterized in that the display device includes：Display as described in claim 6 to 9 is any
The driving device of device.
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| CN201810489238.3A CN108665844B (en) | 2018-05-21 | 2018-05-21 | Display device, driving method thereof and driving device thereof |
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| CN108665844B (en) | 2021-05-14 |
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